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-rw-r--r--content/handlers/html/Makefile26
-rw-r--r--content/handlers/html/box.h258
-rw-r--r--content/handlers/html/box_construct.c1857
-rw-r--r--content/handlers/html/box_construct.h48
-rw-r--r--content/handlers/html/box_inspect.c (renamed from content/handlers/html/box.c)868
-rw-r--r--content/handlers/html/box_inspect.h143
-rw-r--r--content/handlers/html/box_manipulate.c350
-rw-r--r--content/handlers/html/box_manipulate.h106
-rw-r--r--content/handlers/html/box_normalise.c1
-rw-r--r--content/handlers/html/box_normalise.h15
-rw-r--r--content/handlers/html/box_special.c1916
-rw-r--r--content/handlers/html/box_special.h35
-rw-r--r--content/handlers/html/box_textarea.c1
-rw-r--r--content/handlers/html/form.c1
-rw-r--r--content/handlers/html/html.c1
-rw-r--r--content/handlers/html/html_object.c1
-rw-r--r--content/handlers/html/html_redraw.c2
-rw-r--r--content/handlers/html/interaction.c1
-rw-r--r--content/handlers/html/layout.c1
-rw-r--r--content/handlers/html/search.c1
-rw-r--r--desktop/frames.c1
-rw-r--r--desktop/scrollbar.h1
-rw-r--r--desktop/selection.c1
23 files changed, 2961 insertions, 2674 deletions
diff --git a/content/handlers/html/Makefile b/content/handlers/html/Makefile
index 6b4c1e8ee..19766247d 100644
--- a/content/handlers/html/Makefile
+++ b/content/handlers/html/Makefile
@@ -1,7 +1,23 @@
# HTML content handler sources
-S_HTML := box.c box_construct.c box_normalise.c box_textarea.c \
- font.c form.c imagemap.c layout.c search.c table.c \
- html.c html_css.c html_css_fetcher.c html_script.c \
- interaction.c html_redraw.c html_redraw_border.c \
- html_forms.c html_object.c
+S_HTML := box_construct.c \
+ box_inspect.c \
+ box_manipulate.c \
+ box_normalise.c \
+ box_special.c \
+ box_textarea.c \
+ font.c \
+ form.c \
+ imagemap.c \
+ layout.c \
+ search.c \
+ table.c \
+ html.c \
+ html_css.c \
+ html_css_fetcher.c \
+ html_script.c \
+ interaction.c \
+ html_redraw.c \
+ html_redraw_border.c \
+ html_forms.c \
+ html_object.c
diff --git a/content/handlers/html/box.h b/content/handlers/html/box.h
index 1781d1332..b4da031f1 100644
--- a/content/handlers/html/box.h
+++ b/content/handlers/html/box.h
@@ -1,6 +1,7 @@
/*
* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
@@ -19,69 +20,8 @@
/**
* \file
- * Box tree construction and manipulation interface.
+ * Box interface.
*
- * This stage of rendering converts a tree of dom_nodes (produced by libdom)
- * to a tree of struct box. The box tree represents the structure of the
- * document as given by the CSS display and float properties.
- *
- * For example, consider the following HTML:
- * \code
- * <h1>Example Heading</h1>
- * <p>Example paragraph <em>with emphasised text</em> etc.</p> \endcode
- *
- * This would produce approximately the following box tree with default CSS
- * rules:
- * \code
- * BOX_BLOCK (corresponds to h1)
- * BOX_INLINE_CONTAINER
- * BOX_INLINE "Example Heading"
- * BOX_BLOCK (p)
- * BOX_INLINE_CONTAINER
- * BOX_INLINE "Example paragraph "
- * BOX_INLINE "with emphasised text" (em)
- * BOX_INLINE "etc." \endcode
- *
- * Note that the em has been collapsed into the INLINE_CONTAINER.
- *
- * If these CSS rules were applied:
- * \code
- * h1 { display: table-cell }
- * p { display: table-cell }
- * em { float: left; width: 5em } \endcode
- *
- * then the box tree would instead look like this:
- * \code
- * BOX_TABLE
- * BOX_TABLE_ROW_GROUP
- * BOX_TABLE_ROW
- * BOX_TABLE_CELL (h1)
- * BOX_INLINE_CONTAINER
- * BOX_INLINE "Example Heading"
- * BOX_TABLE_CELL (p)
- * BOX_INLINE_CONTAINER
- * BOX_INLINE "Example paragraph "
- * BOX_FLOAT_LEFT (em)
- * BOX_BLOCK
- * BOX_INLINE_CONTAINER
- * BOX_INLINE "with emphasised text"
- * BOX_INLINE "etc." \endcode
- *
- * Here implied boxes have been added and a float is present.
- *
- * A box tree is "normalized" if the following is satisfied:
- * \code
- * parent permitted child nodes
- * BLOCK, INLINE_BLOCK BLOCK, INLINE_CONTAINER, TABLE
- * INLINE_CONTAINER INLINE, INLINE_BLOCK, FLOAT_LEFT, FLOAT_RIGHT, BR, TEXT,
- * INLINE_END
- * INLINE none
- * TABLE at least 1 TABLE_ROW_GROUP
- * TABLE_ROW_GROUP at least 1 TABLE_ROW
- * TABLE_ROW at least 1 TABLE_CELL
- * TABLE_CELL BLOCK, INLINE_CONTAINER, TABLE (same as BLOCK)
- * FLOAT_(LEFT|RIGHT) exactly 1 BLOCK or TABLE
- * \endcode
*/
#ifndef NETSURF_HTML_BOX_H
@@ -89,7 +29,6 @@
#include <limits.h>
#include <stdbool.h>
-#include <stdio.h>
#include <libcss/libcss.h>
#include "content/handlers/css/utils.h"
@@ -517,197 +456,4 @@ extern const char *TARGET_TOP;
extern const char *TARGET_BLANK;
-/**
- * Create a box tree node.
- *
- * \param styles selection results for the box, or NULL
- * \param style computed style for the box (not copied), or 0
- * \param style_owned whether style is owned by this box
- * \param href href for the box (copied), or 0
- * \param target target for the box (not copied), or 0
- * \param title title for the box (not copied), or 0
- * \param id id for the box (not copied), or 0
- * \param context context for allocations
- * \return allocated and initialised box, or 0 on memory exhaustion
- *
- * styles is always owned by the box, if it is set.
- * style is only owned by the box in the case of implied boxes.
- */
-struct box * box_create(css_select_results *styles, css_computed_style *style, bool style_owned, struct nsurl *href, const char *target, const char *title, lwc_string *id, void *context);
-
-
-/**
- * Add a child to a box tree node.
- *
- * \param parent box giving birth
- * \param child box to link as last child of parent
- */
-void box_add_child(struct box *parent, struct box *child);
-
-
-/**
- * Insert a new box as a sibling to a box in a tree.
- *
- * \param box box already in tree
- * \param new_box box to link into tree as next sibling
- */
-void box_insert_sibling(struct box *box, struct box *new_box);
-
-
-/**
- * Unlink a box from the box tree and then free it recursively.
- *
- * \param box box to unlink and free recursively.
- */
-void box_unlink_and_free(struct box *box);
-
-
-/**
- * Free a box tree recursively.
- *
- * \param box box to free recursively
- *
- * The box and all its children is freed.
- */
-void box_free(struct box *box);
-
-
-/**
- * Free the data in a single box structure.
- *
- * \param box box to free
- */
-void box_free_box(struct box *box);
-
-
-/**
- * Find the absolute coordinates of a box.
- *
- * \param box the box to calculate coordinates of
- * \param x updated to x coordinate
- * \param y updated to y coordinate
- */
-void box_coords(struct box *box, int *x, int *y);
-
-
-/**
- * Find the bounds of a box.
- *
- * \param box the box to calculate bounds of
- * \param r receives bounds
- */
-void box_bounds(struct box *box, struct rect *r);
-
-
-/**
- * Find the boxes at a point.
- *
- * \param len_ctx CSS length conversion context for document.
- * \param box box to search children of
- * \param x point to find, in global document coordinates
- * \param y point to find, in global document coordinates
- * \param box_x position of box, in global document coordinates, updated
- * to position of returned box, if any
- * \param box_y position of box, in global document coordinates, updated
- * to position of returned box, if any
- * \return box at given point, or 0 if none found
- *
- * To find all the boxes in the hierarchy at a certain point, use code like
- * this:
- * \code
- * struct box *box = top_of_document_to_search;
- * int box_x = 0, box_y = 0;
- *
- * while ((box = box_at_point(len_ctx, box, x, y, &box_x, &box_y))) {
- * // process box
- * }
- * \endcode
- */
-struct box *box_at_point(const nscss_len_ctx *len_ctx, struct box *box, const int x, const int y, int *box_x, int *box_y);
-
-
-/**
- * Peform pick text on browser window contents to locate the box under
- * the mouse pointer, or nearest in the given direction if the pointer is
- * not over a text box.
- *
- * \param html an HTML content
- * \param x coordinate of mouse
- * \param y coordinate of mouse
- * \param dir direction to search (-1 = above-left, +1 = below-right)
- * \param dx receives x ordinate of mouse relative to text box
- * \param dy receives y ordinate of mouse relative to text box
- */
-struct box *box_pick_text_box(struct html_content *html, int x, int y, int dir, int *dx, int *dy);
-
-
-/**
- * Find a box based upon its id attribute.
- *
- * \param box box tree to search
- * \param id id to look for
- * \return the box or 0 if not found
- */
-struct box *box_find_by_id(struct box *box, lwc_string *id);
-
-
-/**
- * Determine if a box is visible when the tree is rendered.
- *
- * \param box box to check
- * \return true iff the box is rendered
- */
-bool box_visible(struct box *box);
-
-
-/**
- * Print a box tree to a file.
- */
-void box_dump(FILE *stream, struct box *box, unsigned int depth, bool style);
-
-
-/**
- * Applies the given scroll setup to a box. This includes scroll
- * creation/deletion as well as scroll dimension updates.
- *
- * \param c content in which the box is located
- * \param box the box to handle the scrolls for
- * \param bottom whether the horizontal scrollbar should be present
- * \param right whether the vertical scrollbar should be present
- * \return true on success false otherwise
- */
-nserror box_handle_scrollbars(struct content *c, struct box *box,
- bool bottom, bool right);
-
-
-/**
- * Determine if a box has a vertical scrollbar.
- *
- * \param box scrolling box
- * \return the box has a vertical scrollbar
- */
-bool box_vscrollbar_present(const struct box *box);
-
-
-/**
- * Determine if a box has a horizontal scrollbar.
- *
- * \param box scrolling box
- * \return the box has a horizontal scrollbar
- */
-bool box_hscrollbar_present(const struct box *box);
-
-
-/**
- * Check if layout box is a first child.
- *
- * \param[in] b Box to check.
- * \return true iff box is first child.
- */
-static inline bool box_is_first_child(struct box *b)
-{
- return (b->parent == NULL || b == b->parent->children);
-}
-
-
#endif
diff --git a/content/handlers/html/box_construct.c b/content/handlers/html/box_construct.c
index a83330240..1637c0fb1 100644
--- a/content/handlers/html/box_construct.c
+++ b/content/handlers/html/box_construct.c
@@ -25,37 +25,25 @@
* Implementation of conversion from DOM tree to box tree.
*/
-#include <assert.h>
-#include <stdio.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <strings.h>
-
-#include "utils/config.h"
+#include <dom/dom.h>
+
+#include "utils/errors.h"
#include "utils/nsoption.h"
#include "utils/corestrings.h"
-#include "utils/log.h"
-#include "utils/messages.h"
#include "utils/talloc.h"
#include "utils/string.h"
#include "utils/ascii.h"
-#include "netsurf/css.h"
#include "netsurf/misc.h"
-#include "netsurf/plot_style.h"
-#include "content/content_protected.h"
-#include "css/hints.h"
#include "css/select.h"
-#include "css/utils.h"
#include "desktop/gui_internal.h"
-#include "html/html.h"
+#include "html/html_internal.h"
#include "html/box.h"
+#include "html/box_manipulate.h"
#include "html/box_construct.h"
+#include "html/box_special.h"
#include "html/box_normalise.h"
-#include "html/box_textarea.h"
#include "html/form_internal.h"
-#include "html/html_internal.h"
/**
* Context for box tree construction
@@ -159,1752 +147,6 @@ static inline bool box_is_root(dom_node *n)
/**
- * Destructor for object_params, for &lt;object&gt; elements
- *
- * \param o The object params being destroyed.
- * \return 0 to allow talloc to continue destroying the tree.
- */
-static int box_object_talloc_destructor(struct object_params *o)
-{
- if (o->codebase != NULL)
- nsurl_unref(o->codebase);
- if (o->classid != NULL)
- nsurl_unref(o->classid);
- if (o->data != NULL)
- nsurl_unref(o->data);
-
- return 0;
-}
-
-
-/**
- * Parse a multi-length-list, as defined by HTML 4.01.
- *
- * \param ds dom string to parse
- * \param count updated to number of entries
- * \return array of struct box_multi_length, or 0 on memory exhaustion
- */
-static struct frame_dimension *
-box_parse_multi_lengths(const dom_string *ds, unsigned int *count)
-{
- char *end;
- unsigned int i, n;
- struct frame_dimension *length;
- const char *s;
-
- s = dom_string_data(ds);
-
- for (i = 0, n = 1; s[i]; i++)
- if (s[i] == ',')
- n++;
-
- length = calloc(n, sizeof(struct frame_dimension));
- if (!length)
- return NULL;
-
- for (i = 0; i != n; i++) {
- while (ascii_is_space(*s)) {
- s++;
- }
- length[i].value = strtof(s, &end);
- if (length[i].value <= 0) {
- length[i].value = 1;
- }
- s = end;
- switch (*s) {
- case '%':
- length[i].unit = FRAME_DIMENSION_PERCENT;
- break;
- case '*':
- length[i].unit = FRAME_DIMENSION_RELATIVE;
- break;
- default:
- length[i].unit = FRAME_DIMENSION_PIXELS;
- break;
- }
- while (*s && *s != ',') {
- s++;
- }
- if (*s == ',') {
- s++;
- }
- }
-
- *count = n;
- return length;
-}
-
-
-/**
- * Destructor for content_html_frames, for frame elements
- *
- * \param f The frame params being destroyed.
- * \return 0 to allow talloc to continue destroying the tree.
- */
-static int box_frames_talloc_destructor(struct content_html_frames *f)
-{
- if (f->url != NULL) {
- nsurl_unref(f->url);
- f->url = NULL;
- }
-
- return 0;
-}
-
-
-/**
- * create a frameset box tree
- */
-static bool
-box_create_frameset(struct content_html_frames *f,
- dom_node *n,
- html_content *content)
-{
- unsigned int row, col, index, i;
- unsigned int rows = 1, cols = 1;
- dom_string *s;
- dom_exception err;
- nsurl *url;
- struct frame_dimension *row_height = 0, *col_width = 0;
- dom_node *c, *next;
- struct content_html_frames *frame;
- bool default_border = true;
- colour default_border_colour = 0x000000;
-
- /* parse rows and columns */
- err = dom_element_get_attribute(n, corestring_dom_rows, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- row_height = box_parse_multi_lengths(s, &rows);
- dom_string_unref(s);
- if (row_height == NULL)
- return false;
- } else {
- row_height = calloc(1, sizeof(struct frame_dimension));
- if (row_height == NULL)
- return false;
- row_height->value = 100;
- row_height->unit = FRAME_DIMENSION_PERCENT;
- }
-
- err = dom_element_get_attribute(n, corestring_dom_cols, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- col_width = box_parse_multi_lengths(s, &cols);
- dom_string_unref(s);
- if (col_width == NULL) {
- free(row_height);
- return false;
- }
- } else {
- col_width = calloc(1, sizeof(struct frame_dimension));
- if (col_width == NULL) {
- free(row_height);
- return false;
- }
- col_width->value = 100;
- col_width->unit = FRAME_DIMENSION_PERCENT;
- }
-
- /* common extension: border="0|1" to control all children */
- err = dom_element_get_attribute(n, corestring_dom_border, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- if ((dom_string_data(s)[0] == '0') &&
- (dom_string_data(s)[1] == '\0'))
- default_border = false;
- dom_string_unref(s);
- }
-
- /* common extension: frameborder="yes|no" to control all children */
- err = dom_element_get_attribute(n, corestring_dom_frameborder, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc_no) == 0)
- default_border = false;
- dom_string_unref(s);
- }
-
- /* common extension: bordercolor="#RRGGBB|<named colour>" to control
- *all children */
- err = dom_element_get_attribute(n, corestring_dom_bordercolor, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- css_color color;
-
- if (nscss_parse_colour(dom_string_data(s), &color))
- default_border_colour = nscss_color_to_ns(color);
-
- dom_string_unref(s);
- }
-
- /* update frameset and create default children */
- f->cols = cols;
- f->rows = rows;
- f->scrolling = BW_SCROLLING_NO;
- f->children = talloc_array(content->bctx, struct content_html_frames,
- (rows * cols));
-
- talloc_set_destructor(f->children, box_frames_talloc_destructor);
-
- for (row = 0; row < rows; row++) {
- for (col = 0; col < cols; col++) {
- index = (row * cols) + col;
- frame = &f->children[index];
- frame->cols = 0;
- frame->rows = 0;
- frame->width = col_width[col];
- frame->height = row_height[row];
- frame->margin_width = 0;
- frame->margin_height = 0;
- frame->name = NULL;
- frame->url = NULL;
- frame->no_resize = false;
- frame->scrolling = BW_SCROLLING_AUTO;
- frame->border = default_border;
- frame->border_colour = default_border_colour;
- frame->children = NULL;
- }
- }
- free(col_width);
- free(row_height);
-
- /* create the frameset windows */
- err = dom_node_get_first_child(n, &c);
- if (err != DOM_NO_ERR)
- return false;
-
- for (row = 0; c != NULL && row < rows; row++) {
- for (col = 0; c != NULL && col < cols; col++) {
- while (c != NULL) {
- dom_node_type type;
- dom_string *name;
-
- err = dom_node_get_node_type(c, &type);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- err = dom_node_get_node_name(c, &name);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- if (type != DOM_ELEMENT_NODE ||
- (!dom_string_caseless_lwc_isequal(
- name,
- corestring_lwc_frame) &&
- !dom_string_caseless_lwc_isequal(
- name,
- corestring_lwc_frameset
- ))) {
- err = dom_node_get_next_sibling(c,
- &next);
- if (err != DOM_NO_ERR) {
- dom_string_unref(name);
- dom_node_unref(c);
- return false;
- }
-
- dom_string_unref(name);
- dom_node_unref(c);
- c = next;
- } else {
- /* Got a FRAME or FRAMESET element */
- dom_string_unref(name);
- break;
- }
- }
-
- if (c == NULL)
- break;
-
- /* get current frame */
- index = (row * cols) + col;
- frame = &f->children[index];
-
- /* nest framesets */
- err = dom_node_get_node_name(c, &s);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc_frameset)) {
- dom_string_unref(s);
- frame->border = 0;
- if (box_create_frameset(frame, c,
- content) == false) {
- dom_node_unref(c);
- return false;
- }
-
- err = dom_node_get_next_sibling(c, &next);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- dom_node_unref(c);
- c = next;
- continue;
- }
-
- dom_string_unref(s);
-
- /* get frame URL (not required) */
- url = NULL;
- err = dom_element_get_attribute(c, corestring_dom_src, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- box_extract_link(content, s, content->base_url,
- &url);
- dom_string_unref(s);
- }
-
- /* copy url */
- if (url != NULL) {
- /* no self-references */
- if (nsurl_compare(content->base_url, url,
- NSURL_COMPLETE) == false)
- frame->url = url;
- url = NULL;
- }
-
- /* fill in specified values */
- err = dom_element_get_attribute(c, corestring_dom_name, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- frame->name = talloc_strdup(content->bctx,
- dom_string_data(s));
- dom_string_unref(s);
- }
-
- if (dom_element_has_attribute(c, corestring_dom_noresize,
- &frame->no_resize) != DOM_NO_ERR) {
- /* If we can't read the attribute for some reason,
- * assume we didn't have it.
- */
- frame->no_resize = false;
- }
-
- err = dom_element_get_attribute(c, corestring_dom_frameborder,
- &s);
- if (err == DOM_NO_ERR && s != NULL) {
- i = atoi(dom_string_data(s));
- frame->border = (i != 0);
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(c, corestring_dom_scrolling, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc_yes))
- frame->scrolling = BW_SCROLLING_YES;
- else if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc_no))
- frame->scrolling = BW_SCROLLING_NO;
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(c, corestring_dom_marginwidth,
- &s);
- if (err == DOM_NO_ERR && s != NULL) {
- frame->margin_width = atoi(dom_string_data(s));
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(c, corestring_dom_marginheight,
- &s);
- if (err == DOM_NO_ERR && s != NULL) {
- frame->margin_height = atoi(dom_string_data(s));
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(c, corestring_dom_bordercolor,
- &s);
- if (err == DOM_NO_ERR && s != NULL) {
- css_color color;
-
- if (nscss_parse_colour(dom_string_data(s),
- &color))
- frame->border_colour =
- nscss_color_to_ns(color);
-
- dom_string_unref(s);
- }
-
- /* advance */
- err = dom_node_get_next_sibling(c, &next);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- dom_node_unref(c);
- c = next;
- }
- }
-
- /* If the last child wasn't a frame, we still need to unref it */
- if (c != NULL) {
- dom_node_unref(c);
- }
-
- return true;
-}
-
-
-/**
- * Destructor for content_html_iframe, for &lt;iframe&gt; elements
- *
- * \param f The iframe params being destroyed.
- * \return 0 to allow talloc to continue destroying the tree.
- */
-static int box_iframes_talloc_destructor(struct content_html_iframe *f)
-{
- if (f->url != NULL) {
- nsurl_unref(f->url);
- f->url = NULL;
- }
-
- return 0;
-}
-
-
-/**
- * Get the value of a dom node element's attribute.
- *
- * \param n dom element node
- * \param attribute name of attribute
- * \param context talloc context for result buffer
- * \param value updated to value, if the attribute is present
- * \return true on success, false if attribute present but memory exhausted
- *
- * \note returning true does not imply that the attribute was found. If the
- * attribute was not found, *value will be unchanged.
- */
-static bool
-box_get_attribute(dom_node *n,
- const char *attribute,
- void *context,
- char **value)
-{
- char *result;
- dom_string *attr, *attr_name;
- dom_exception err;
-
- err = dom_string_create_interned((const uint8_t *) attribute,
- strlen(attribute), &attr_name);
- if (err != DOM_NO_ERR)
- return false;
-
- err = dom_element_get_attribute(n, attr_name, &attr);
- if (err != DOM_NO_ERR) {
- dom_string_unref(attr_name);
- return false;
- }
-
- dom_string_unref(attr_name);
-
- if (attr != NULL) {
- result = talloc_strdup(context, dom_string_data(attr));
-
- dom_string_unref(attr);
-
- if (result == NULL)
- return false;
-
- *value = result;
- }
-
- return true;
-}
-
-
-/**
- * Helper function for adding textarea widget to box.
- *
- * This is a load of hacks to ensure boxes replaced with textareas
- * can be handled by the layout code.
- */
-static bool
-box_input_text(html_content *html, struct box *box, struct dom_node *node)
-{
- struct box *inline_container, *inline_box;
-
- box->type = BOX_INLINE_BLOCK;
-
- inline_container = box_create(NULL, 0, false, 0, 0, 0, 0, html->bctx);
- if (!inline_container)
- return false;
- inline_container->type = BOX_INLINE_CONTAINER;
- inline_box = box_create(NULL, box->style, false, 0, 0, box->title, 0,
- html->bctx);
- if (!inline_box)
- return false;
- inline_box->type = BOX_TEXT;
- inline_box->text = talloc_strdup(html->bctx, "");
-
- box_add_child(inline_container, inline_box);
- box_add_child(box, inline_container);
-
- return box_textarea_create_textarea(html, box, node);
-}
-
-
-/**
- * Add an option to a form select control (helper function for box_select()).
- *
- * \param control select containing the &lt;option&gt;
- * \param n xml element node for &lt;option&gt;
- * \return true on success, false on memory exhaustion
- */
-static bool box_select_add_option(struct form_control *control, dom_node *n)
-{
- char *value = NULL;
- char *text = NULL;
- char *text_nowrap = NULL;
- bool selected;
- dom_string *content, *s;
- dom_exception err;
-
- err = dom_node_get_text_content(n, &content);
- if (err != DOM_NO_ERR)
- return false;
-
- if (content != NULL) {
- text = squash_whitespace(dom_string_data(content));
- dom_string_unref(content);
- } else {
- text = strdup("");
- }
-
- if (text == NULL)
- goto no_memory;
-
- err = dom_element_get_attribute(n, corestring_dom_value, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- value = strdup(dom_string_data(s));
- dom_string_unref(s);
- } else {
- value = strdup(text);
- }
-
- if (value == NULL)
- goto no_memory;
-
- if (dom_element_has_attribute(n, corestring_dom_selected, &selected) != DOM_NO_ERR) {
- /* Assume not selected if we can't read the attribute presence */
- selected = false;
- }
-
- /* replace spaces/TABs with hard spaces to prevent line wrapping */
- text_nowrap = cnv_space2nbsp(text);
- if (text_nowrap == NULL)
- goto no_memory;
-
- if (form_add_option(control, value, text_nowrap, selected, n) == false)
- goto no_memory;
-
- free(text);
-
- return true;
-
-no_memory:
- free(value);
- free(text);
- free(text_nowrap);
- return false;
-}
-
-
-/**
- * \name Special case element handlers
- *
- * These functions are called by box_construct_element() when an element is
- * being converted, according to the entries in element_table.
- *
- * The parameters are the xmlNode, the content for the document, and a partly
- * filled in box structure for the element.
- *
- * Return true on success, false on memory exhaustion. Set *convert_children
- * to false if children of this element in the XML tree should be skipped (for
- * example, if they have been processed in some special way already).
- *
- * Elements ordered as in the HTML 4.01 specification. Section numbers in
- * brackets [] refer to the spec.
- *
- * \{
- */
-
-/**
- * special element handler for Anchor [12.2].
- */
-static bool
-box_a(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- bool ok;
- nsurl *url;
- dom_string *s;
- dom_exception err;
-
- err = dom_element_get_attribute(n, corestring_dom_href, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- ok = box_extract_link(content, s, content->base_url, &url);
- dom_string_unref(s);
- if (!ok)
- return false;
- if (url) {
- if (box->href != NULL)
- nsurl_unref(box->href);
- box->href = url;
- }
- }
-
- /* name and id share the same namespace */
- err = dom_element_get_attribute(n, corestring_dom_name, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- lwc_string *lwc_name;
-
- err = dom_string_intern(s, &lwc_name);
-
- dom_string_unref(s);
-
- if (err == DOM_NO_ERR) {
- /* name replaces existing id
- * TODO: really? */
- if (box->id != NULL)
- lwc_string_unref(box->id);
-
- box->id = lwc_name;
- }
- }
-
- /* target frame [16.3] */
- err = dom_element_get_attribute(n, corestring_dom_target, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc__blank))
- box->target = TARGET_BLANK;
- else if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc__top))
- box->target = TARGET_TOP;
- else if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc__parent))
- box->target = TARGET_PARENT;
- else if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc__self))
- /* the default may have been overridden by a
- * <base target=...>, so this is different to 0 */
- box->target = TARGET_SELF;
- else {
- /* 6.16 says that frame names must begin with [a-zA-Z]
- * This doesn't match reality, so just take anything */
- box->target = talloc_strdup(content->bctx,
- dom_string_data(s));
- if (!box->target) {
- dom_string_unref(s);
- return false;
- }
- }
- dom_string_unref(s);
- }
-
- return true;
-}
-
-
-/**
- * Document body special element handler [7.5.1].
- */
-static bool
-box_body(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- css_color color;
-
- css_computed_background_color(box->style, &color);
- if (nscss_color_is_transparent(color)) {
- content->background_colour = NS_TRANSPARENT;
- } else {
- content->background_colour = nscss_color_to_ns(color);
- }
-
- return true;
-}
-
-
-/**
- * special element handler for forced line break [9.3.2].
- */
-static bool
-box_br(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- box->type = BOX_BR;
- return true;
-}
-
-
-/**
- * special element handler for Push button [17.5].
- */
-static bool
-box_button(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- struct form_control *gadget;
-
- gadget = html_forms_get_control_for_node(content->forms, n);
- if (!gadget)
- return false;
-
- gadget->html = content;
- box->gadget = gadget;
- box->flags |= IS_REPLACED;
- gadget->box = box;
-
- box->type = BOX_INLINE_BLOCK;
-
- /* Just render the contents */
-
- return true;
-}
-
-
-/**
- * Canvas element
- */
-static bool
-box_canvas(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- /* If scripting is not enabled display the contents of canvas */
- if (!content->enable_scripting) {
- return true;
- }
- *convert_children = false;
-
- return true;
-}
-
-
-/**
- * Embedded object (not in any HTML specification:
- * see http://wp.netscape.com/assist/net_sites/new_html3_prop.html )
- */
-static bool
-box_embed(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- struct object_params *params;
- struct object_param *param;
- dom_namednodemap *attrs;
- unsigned long idx;
- uint32_t num_attrs;
- dom_string *src;
- dom_exception err;
-
- if (box->style &&
- ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
- return true;
-
- params = talloc(content->bctx, struct object_params);
- if (params == NULL)
- return false;
-
- talloc_set_destructor(params, box_object_talloc_destructor);
-
- params->data = NULL;
- params->type = NULL;
- params->codetype = NULL;
- params->codebase = NULL;
- params->classid = NULL;
- params->params = NULL;
-
- /* src is a URL */
- err = dom_element_get_attribute(n, corestring_dom_src, &src);
- if (err != DOM_NO_ERR || src == NULL)
- return true;
- if (box_extract_link(content, src, content->base_url,
- &params->data) == false) {
- dom_string_unref(src);
- return false;
- }
-
- dom_string_unref(src);
-
- if (params->data == NULL)
- return true;
-
- /* Don't include ourself */
- if (nsurl_compare(content->base_url, params->data, NSURL_COMPLETE))
- return true;
-
- /* add attributes as parameters to linked list */
- err = dom_node_get_attributes(n, &attrs);
- if (err != DOM_NO_ERR)
- return false;
-
- err = dom_namednodemap_get_length(attrs, &num_attrs);
- if (err != DOM_NO_ERR) {
- dom_namednodemap_unref(attrs);
- return false;
- }
-
- for (idx = 0; idx < num_attrs; idx++) {
- dom_attr *attr;
- dom_string *name, *value;
-
- err = dom_namednodemap_item(attrs, idx, (void *) &attr);
- if (err != DOM_NO_ERR) {
- dom_namednodemap_unref(attrs);
- return false;
- }
-
- err = dom_attr_get_name(attr, &name);
- if (err != DOM_NO_ERR) {
- dom_node_unref(attr);
- dom_namednodemap_unref(attrs);
- return false;
- }
-
- if (dom_string_caseless_lwc_isequal(name, corestring_lwc_src)) {
- dom_node_unref(attr);
- dom_string_unref(name);
- continue;
- }
-
- err = dom_attr_get_value(attr, &value);
- if (err != DOM_NO_ERR) {
- dom_node_unref(attr);
- dom_string_unref(name);
- dom_namednodemap_unref(attrs);
- return false;
- }
-
- param = talloc(content->bctx, struct object_param);
- if (param == NULL) {
- dom_node_unref(attr);
- dom_string_unref(value);
- dom_string_unref(name);
- dom_namednodemap_unref(attrs);
- return false;
- }
-
- param->name = talloc_strdup(content->bctx, dom_string_data(name));
- param->value = talloc_strdup(content->bctx, dom_string_data(value));
- param->type = NULL;
- param->valuetype = talloc_strdup(content->bctx, "data");
- param->next = NULL;
-
- dom_string_unref(value);
- dom_string_unref(name);
- dom_node_unref(attr);
-
- if (param->name == NULL || param->value == NULL ||
- param->valuetype == NULL) {
- dom_namednodemap_unref(attrs);
- return false;
- }
-
- param->next = params->params;
- params->params = param;
- }
-
- dom_namednodemap_unref(attrs);
-
- box->object_params = params;
-
- /* start fetch */
- box->flags |= IS_REPLACED;
- return html_fetch_object(content, params->data, box, CONTENT_ANY,
- content->base.available_width, 1000, false);
-}
-
-
-/**
- * Window subdivision [16.2.1].
- */
-static bool
-box_frameset(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- bool ok;
-
- if (content->frameset) {
- NSLOG(netsurf, INFO, "Error: multiple framesets in document.");
- /* Don't convert children */
- if (convert_children)
- *convert_children = false;
- /* And ignore this spurious frameset */
- box->type = BOX_NONE;
- return true;
- }
-
- content->frameset = talloc_zero(content->bctx,
- struct content_html_frames);
- if (!content->frameset) {
- return false;
- }
-
- ok = box_create_frameset(content->frameset, n, content);
- if (ok) {
- box->type = BOX_NONE;
- }
-
- if (convert_children) {
- *convert_children = false;
- }
- return ok;
-}
-
-
-/**
- * Inline subwindow [16.5].
- */
-static bool
-box_iframe(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- nsurl *url;
- dom_string *s;
- dom_exception err;
- struct content_html_iframe *iframe;
- int i;
-
- if (box->style &&
- ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
- return true;
-
- if (box->style &&
- css_computed_visibility(box->style) == CSS_VISIBILITY_HIDDEN) {
- /* Don't create iframe discriptors for invisible iframes
- * TODO: handle hidden iframes at browser_window generation
- * time instead? */
- return true;
- }
-
- /* get frame URL */
- err = dom_element_get_attribute(n, corestring_dom_src, &s);
- if (err != DOM_NO_ERR || s == NULL)
- return true;
- if (box_extract_link(content, s, content->base_url, &url) == false) {
- dom_string_unref(s);
- return false;
- }
- dom_string_unref(s);
- if (url == NULL)
- return true;
-
- /* don't include ourself */
- if (nsurl_compare(content->base_url, url, NSURL_COMPLETE)) {
- nsurl_unref(url);
- return true;
- }
-
- /* create a new iframe */
- iframe = talloc(content->bctx, struct content_html_iframe);
- if (iframe == NULL) {
- nsurl_unref(url);
- return false;
- }
-
- talloc_set_destructor(iframe, box_iframes_talloc_destructor);
-
- iframe->box = box;
- iframe->margin_width = 0;
- iframe->margin_height = 0;
- iframe->name = NULL;
- iframe->url = url;
- iframe->scrolling = BW_SCROLLING_AUTO;
- iframe->border = true;
-
- /* Add this iframe to the linked list of iframes */
- iframe->next = content->iframe;
- content->iframe = iframe;
-
- /* fill in specified values */
- err = dom_element_get_attribute(n, corestring_dom_name, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- iframe->name = talloc_strdup(content->bctx, dom_string_data(s));
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(n, corestring_dom_frameborder, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- i = atoi(dom_string_data(s));
- iframe->border = (i != 0);
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(n, corestring_dom_bordercolor, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- css_color color;
-
- if (nscss_parse_colour(dom_string_data(s), &color))
- iframe->border_colour = nscss_color_to_ns(color);
-
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(n, corestring_dom_scrolling, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc_yes))
- iframe->scrolling = BW_SCROLLING_YES;
- else if (dom_string_caseless_lwc_isequal(s,
- corestring_lwc_no))
- iframe->scrolling = BW_SCROLLING_NO;
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(n, corestring_dom_marginwidth, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- iframe->margin_width = atoi(dom_string_data(s));
- dom_string_unref(s);
- }
-
- err = dom_element_get_attribute(n, corestring_dom_marginheight, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- iframe->margin_height = atoi(dom_string_data(s));
- dom_string_unref(s);
- }
-
- /* box */
- assert(box->style);
- box->flags |= IFRAME;
- box->flags |= IS_REPLACED;
-
- /* Showing iframe, so don't show alternate content */
- if (convert_children)
- *convert_children = false;
- return true;
-}
-
-
-/**
- * Embedded image [13.2].
- */
-static bool
-box_image(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- bool ok;
- dom_string *s;
- dom_exception err;
- nsurl *url;
- enum css_width_e wtype;
- enum css_height_e htype;
- css_fixed value = 0;
- css_unit wunit = CSS_UNIT_PX;
- css_unit hunit = CSS_UNIT_PX;
-
- if (box->style &&
- ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
- return true;
-
- /* handle alt text */
- err = dom_element_get_attribute(n, corestring_dom_alt, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- char *alt = squash_whitespace(dom_string_data(s));
- dom_string_unref(s);
- if (alt == NULL)
- return false;
- box->text = talloc_strdup(content->bctx, alt);
- free(alt);
- if (box->text == NULL)
- return false;
- box->length = strlen(box->text);
- }
-
- if (nsoption_bool(foreground_images) == false) {
- return true;
- }
-
- /* imagemap associated with this image */
- if (!box_get_attribute(n, "usemap", content->bctx, &box->usemap))
- return false;
- if (box->usemap && box->usemap[0] == '#')
- box->usemap++;
-
- /* get image URL */
- err = dom_element_get_attribute(n, corestring_dom_src, &s);
- if (err != DOM_NO_ERR || s == NULL)
- return true;
-
- if (box_extract_link(content, s, content->base_url, &url) == false) {
- dom_string_unref(s);
- return false;
- }
-
- dom_string_unref(s);
-
- if (url == NULL)
- return true;
-
- /* start fetch */
- box->flags |= IS_REPLACED;
- ok = html_fetch_object(content, url, box, image_types,
- content->base.available_width, 1000, false);
- nsurl_unref(url);
-
- wtype = css_computed_width(box->style, &value, &wunit);
- htype = css_computed_height(box->style, &value, &hunit);
-
- if (wtype == CSS_WIDTH_SET &&
- wunit != CSS_UNIT_PCT &&
- htype == CSS_HEIGHT_SET &&
- hunit != CSS_UNIT_PCT) {
- /* We know the dimensions the image will be shown at
- * before it's fetched. */
- box->flags |= REPLACE_DIM;
- }
-
- return ok;
-}
-
-
-/**
- * Form control [17.4].
- */
-static bool
-box_input(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- struct form_control *gadget;
- dom_string *type = NULL;
- dom_exception err;
- nsurl *url;
- nserror error;
-
- gadget = html_forms_get_control_for_node(content->forms, n);
- if (gadget == NULL) {
- return false;
- }
-
- box->gadget = gadget;
- box->flags |= IS_REPLACED;
- gadget->box = box;
- gadget->html = content;
-
- /* get entry type */
- err = dom_element_get_attribute(n, corestring_dom_type, &type);
- if ((err != DOM_NO_ERR) || (type == NULL)) {
- /* no type so "text" is assumed */
- if (box_input_text(content, box, n) == false) {
- return false;
- }
- *convert_children = false;
- return true;
- }
-
- if (dom_string_caseless_lwc_isequal(type, corestring_lwc_password)) {
- if (box_input_text(content, box, n) == false)
- goto no_memory;
-
- } else if (dom_string_caseless_lwc_isequal(type, corestring_lwc_file)) {
- box->type = BOX_INLINE_BLOCK;
-
- } else if (dom_string_caseless_lwc_isequal(type,
- corestring_lwc_hidden)) {
- /* no box for hidden inputs */
- box->type = BOX_NONE;
-
- } else if ((dom_string_caseless_lwc_isequal(type,
- corestring_lwc_checkbox) ||
- dom_string_caseless_lwc_isequal(type,
- corestring_lwc_radio))) {
-
- } else if (dom_string_caseless_lwc_isequal(type,
- corestring_lwc_submit) ||
- dom_string_caseless_lwc_isequal(type,
- corestring_lwc_reset) ||
- dom_string_caseless_lwc_isequal(type,
- corestring_lwc_button)) {
- struct box *inline_container, *inline_box;
-
- if (box_button(n, content, box, 0) == false)
- goto no_memory;
-
- inline_container = box_create(NULL, 0, false, 0, 0, 0, 0,
- content->bctx);
- if (inline_container == NULL)
- goto no_memory;
-
- inline_container->type = BOX_INLINE_CONTAINER;
-
- inline_box = box_create(NULL, box->style, false, 0, 0,
- box->title, 0, content->bctx);
- if (inline_box == NULL)
- goto no_memory;
-
- inline_box->type = BOX_TEXT;
-
- if (box->gadget->value != NULL)
- inline_box->text = talloc_strdup(content->bctx,
- box->gadget->value);
- else if (box->gadget->type == GADGET_SUBMIT)
- inline_box->text = talloc_strdup(content->bctx,
- messages_get("Form_Submit"));
- else if (box->gadget->type == GADGET_RESET)
- inline_box->text = talloc_strdup(content->bctx,
- messages_get("Form_Reset"));
- else
- inline_box->text = talloc_strdup(content->bctx,
- "Button");
-
- if (inline_box->text == NULL)
- goto no_memory;
-
- inline_box->length = strlen(inline_box->text);
-
- box_add_child(inline_container, inline_box);
-
- box_add_child(box, inline_container);
-
- } else if (dom_string_caseless_lwc_isequal(type,
- corestring_lwc_image)) {
- gadget->type = GADGET_IMAGE;
-
- if (box->style &&
- ns_computed_display(box->style,
- box_is_root(n)) != CSS_DISPLAY_NONE &&
- nsoption_bool(foreground_images) == true) {
- dom_string *s;
-
- err = dom_element_get_attribute(n, corestring_dom_src, &s);
- if (err == DOM_NO_ERR && s != NULL) {
- error = nsurl_join(content->base_url,
- dom_string_data(s), &url);
- dom_string_unref(s);
- if (error != NSERROR_OK)
- goto no_memory;
-
- /* if url is equivalent to the parent's url,
- * we've got infinite inclusion. stop it here
- */
- if (nsurl_compare(url, content->base_url,
- NSURL_COMPLETE) == false) {
- if (!html_fetch_object(content, url,
- box, image_types,
- content->base.
- available_width,
- 1000, false)) {
- nsurl_unref(url);
- goto no_memory;
- }
- }
- nsurl_unref(url);
- }
- }
- } else {
- /* unhandled type the default is "text" */
- if (box_input_text(content, box, n) == false)
- goto no_memory;
- }
-
- dom_string_unref(type);
-
- *convert_children = false;
-
- return true;
-
-no_memory:
- dom_string_unref(type);
-
- return false;
-}
-
-
-/**
- * Noscript element
- */
-static bool
-box_noscript(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- /* If scripting is enabled, do not display the contents of noscript */
- if (content->enable_scripting) {
- *convert_children = false;
- }
-
- return true;
-}
-
-
-/**
- * Generic embedded object [13.3].
- */
-static bool
-box_object(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- struct object_params *params;
- struct object_param *param;
- dom_string *codebase, *classid, *data;
- dom_node *c;
- dom_exception err;
-
- if (box->style &&
- ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
- return true;
-
- if (box_get_attribute(n, "usemap", content->bctx, &box->usemap) ==
- false)
- return false;
- if (box->usemap && box->usemap[0] == '#')
- box->usemap++;
-
- params = talloc(content->bctx, struct object_params);
- if (params == NULL)
- return false;
-
- talloc_set_destructor(params, box_object_talloc_destructor);
-
- params->data = NULL;
- params->type = NULL;
- params->codetype = NULL;
- params->codebase = NULL;
- params->classid = NULL;
- params->params = NULL;
-
- /* codebase, classid, and data are URLs
- * (codebase is the base for the other two) */
- err = dom_element_get_attribute(n, corestring_dom_codebase, &codebase);
- if (err == DOM_NO_ERR && codebase != NULL) {
- if (box_extract_link(content, codebase, content->base_url,
- &params->codebase) == false) {
- dom_string_unref(codebase);
- return false;
- }
- dom_string_unref(codebase);
- }
- if (params->codebase == NULL)
- params->codebase = nsurl_ref(content->base_url);
-
- err = dom_element_get_attribute(n, corestring_dom_classid, &classid);
- if (err == DOM_NO_ERR && classid != NULL) {
- if (box_extract_link(content, classid,
- params->codebase, &params->classid) == false) {
- dom_string_unref(classid);
- return false;
- }
- dom_string_unref(classid);
- }
-
- err = dom_element_get_attribute(n, corestring_dom_data, &data);
- if (err == DOM_NO_ERR && data != NULL) {
- if (box_extract_link(content, data,
- params->codebase, &params->data) == false) {
- dom_string_unref(data);
- return false;
- }
- dom_string_unref(data);
- }
-
- if (params->classid == NULL && params->data == NULL)
- /* nothing to embed; ignore */
- return true;
-
- /* Don't include ourself */
- if (params->classid != NULL && nsurl_compare(content->base_url,
- params->classid, NSURL_COMPLETE))
- return true;
-
- if (params->data != NULL && nsurl_compare(content->base_url,
- params->data, NSURL_COMPLETE))
- return true;
-
- /* codetype and type are MIME types */
- if (box_get_attribute(n, "codetype", params,
- &params->codetype) == false)
- return false;
- if (box_get_attribute(n, "type", params, &params->type) == false)
- return false;
-
- /* classid && !data => classid is used (consult codetype)
- * (classid || !classid) && data => data is used (consult type)
- * !classid && !data => invalid; ignored */
-
- if (params->classid != NULL && params->data == NULL &&
- params->codetype != NULL) {
- lwc_string *icodetype;
- lwc_error lerror;
-
- lerror = lwc_intern_string(params->codetype,
- strlen(params->codetype), &icodetype);
- if (lerror != lwc_error_ok)
- return false;
-
- if (content_factory_type_from_mime_type(icodetype) ==
- CONTENT_NONE) {
- /* can't handle this MIME type */
- lwc_string_unref(icodetype);
- return true;
- }
-
- lwc_string_unref(icodetype);
- }
-
- if (params->data != NULL && params->type != NULL) {
- lwc_string *itype;
- lwc_error lerror;
-
- lerror = lwc_intern_string(params->type, strlen(params->type),
- &itype);
- if (lerror != lwc_error_ok)
- return false;
-
- if (content_factory_type_from_mime_type(itype) ==
- CONTENT_NONE) {
- /* can't handle this MIME type */
- lwc_string_unref(itype);
- return true;
- }
-
- lwc_string_unref(itype);
- }
-
- /* add parameters to linked list */
- err = dom_node_get_first_child(n, &c);
- if (err != DOM_NO_ERR)
- return false;
-
- while (c != NULL) {
- dom_node *next;
- dom_node_type type;
-
- err = dom_node_get_node_type(c, &type);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- if (type == DOM_ELEMENT_NODE) {
- dom_string *name;
-
- err = dom_node_get_node_name(c, &name);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- if (!dom_string_caseless_lwc_isequal(name,
- corestring_lwc_param)) {
- /* The first non-param child is the start of
- * the alt html. Therefore, we should break
- * out of this loop. */
- dom_string_unref(name);
- dom_node_unref(c);
- break;
- }
- dom_string_unref(name);
-
- param = talloc(params, struct object_param);
- if (param == NULL) {
- dom_node_unref(c);
- return false;
- }
- param->name = NULL;
- param->value = NULL;
- param->type = NULL;
- param->valuetype = NULL;
- param->next = NULL;
-
- if (box_get_attribute(c, "name", param,
- &param->name) == false) {
- dom_node_unref(c);
- return false;
- }
-
- if (box_get_attribute(c, "value", param,
- &param->value) == false) {
- dom_node_unref(c);
- return false;
- }
-
- if (box_get_attribute(c, "type", param,
- &param->type) == false) {
- dom_node_unref(c);
- return false;
- }
-
- if (box_get_attribute(c, "valuetype", param,
- &param->valuetype) == false) {
- dom_node_unref(c);
- return false;
- }
-
- if (param->valuetype == NULL) {
- param->valuetype = talloc_strdup(param, "data");
- if (param->valuetype == NULL) {
- dom_node_unref(c);
- return false;
- }
- }
-
- param->next = params->params;
- params->params = param;
- }
-
- err = dom_node_get_next_sibling(c, &next);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- return false;
- }
-
- dom_node_unref(c);
- c = next;
- }
-
- box->object_params = params;
-
- /* start fetch (MIME type is ok or not specified) */
- box->flags |= IS_REPLACED;
- if (!html_fetch_object(content,
- params->data ? params->data : params->classid,
- box, CONTENT_ANY, content->base.available_width, 1000,
- false))
- return false;
-
- *convert_children = false;
- return true;
-}
-
-
-/**
- * Preformatted text [9.3.4].
- */
-static bool
-box_pre(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- box->flags |= PRE_STRIP;
- return true;
-}
-
-
-/**
- * Option selector [17.6].
- */
-static bool
-box_select(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- struct box *inline_container;
- struct box *inline_box;
- struct form_control *gadget;
- dom_node *c, *c2;
- dom_node *next, *next2;
- dom_exception err;
-
- gadget = html_forms_get_control_for_node(content->forms, n);
- if (gadget == NULL)
- return false;
-
- gadget->html = content;
- err = dom_node_get_first_child(n, &c);
- if (err != DOM_NO_ERR) {
- form_free_control(gadget);
- return false;
- }
-
- while (c != NULL) {
- dom_string *name;
-
- err = dom_node_get_node_name(c, &name);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
-
- if (dom_string_caseless_lwc_isequal(name,
- corestring_lwc_option)) {
- dom_string_unref(name);
-
- if (box_select_add_option(gadget, c) == false) {
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
- } else if (dom_string_caseless_lwc_isequal(name,
- corestring_lwc_optgroup)) {
- dom_string_unref(name);
-
- err = dom_node_get_first_child(c, &c2);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
-
- while (c2 != NULL) {
- dom_string *c2_name;
-
- err = dom_node_get_node_name(c2, &c2_name);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c2);
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
-
- if (dom_string_caseless_lwc_isequal(c2_name,
- corestring_lwc_option)) {
- dom_string_unref(c2_name);
-
- if (box_select_add_option(gadget,
- c2) == false) {
- dom_node_unref(c2);
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
- } else {
- dom_string_unref(c2_name);
- }
-
- err = dom_node_get_next_sibling(c2, &next2);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c2);
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
-
- dom_node_unref(c2);
- c2 = next2;
- }
- } else {
- dom_string_unref(name);
- }
-
- err = dom_node_get_next_sibling(c, &next);
- if (err != DOM_NO_ERR) {
- dom_node_unref(c);
- form_free_control(gadget);
- return false;
- }
-
- dom_node_unref(c);
- c = next;
- }
-
- if (gadget->data.select.num_items == 0) {
- /* no options: ignore entire select */
- form_free_control(gadget);
- return true;
- }
-
- box->type = BOX_INLINE_BLOCK;
- box->gadget = gadget;
- box->flags |= IS_REPLACED;
- gadget->box = box;
-
- inline_container = box_create(NULL, 0, false, 0, 0, 0, 0, content->bctx);
- if (inline_container == NULL)
- goto no_memory;
- inline_container->type = BOX_INLINE_CONTAINER;
- inline_box = box_create(NULL, box->style, false, 0, 0, box->title, 0,
- content->bctx);
- if (inline_box == NULL)
- goto no_memory;
- inline_box->type = BOX_TEXT;
- box_add_child(inline_container, inline_box);
- box_add_child(box, inline_container);
-
- if (gadget->data.select.multiple == false &&
- gadget->data.select.num_selected == 0) {
- gadget->data.select.current = gadget->data.select.items;
- gadget->data.select.current->initial_selected =
- gadget->data.select.current->selected = true;
- gadget->data.select.num_selected = 1;
- dom_html_option_element_set_selected(
- gadget->data.select.current->node, true);
- }
-
- if (gadget->data.select.num_selected == 0)
- inline_box->text = talloc_strdup(content->bctx,
- messages_get("Form_None"));
- else if (gadget->data.select.num_selected == 1)
- inline_box->text = talloc_strdup(content->bctx,
- gadget->data.select.current->text);
- else
- inline_box->text = talloc_strdup(content->bctx,
- messages_get("Form_Many"));
- if (inline_box->text == NULL)
- goto no_memory;
-
- inline_box->length = strlen(inline_box->text);
-
- *convert_children = false;
- return true;
-
-no_memory:
- return false;
-}
-
-
-/**
- * Multi-line text field [17.7].
- */
-static bool box_textarea(dom_node *n,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- /* Get the form_control for the DOM node */
- box->gadget = html_forms_get_control_for_node(content->forms, n);
- if (box->gadget == NULL)
- return false;
-
- box->flags |= IS_REPLACED;
- box->gadget->html = content;
- box->gadget->box = box;
-
- if (!box_input_text(content, box, n))
- return false;
-
- *convert_children = false;
- return true;
-}
-
-
-/**
- * \}
- */
-
-
-/**
* Extract transient construction properties
*
* \param n Current DOM node to convert
@@ -2245,93 +487,6 @@ box_construct_marker(struct box *box,
/**
- * call an elements special handler
- */
-static bool
-convert_special_elements(dom_node *node,
- html_content *content,
- struct box *box,
- bool *convert_children)
-{
- dom_exception exc;
- dom_html_element_type tag_type;
- bool res;
-
- exc = dom_html_element_get_tag_type(node, &tag_type);
- if (exc != DOM_NO_ERR) {
- tag_type = DOM_HTML_ELEMENT_TYPE__UNKNOWN;
- }
-
- switch (tag_type) {
- case DOM_HTML_ELEMENT_TYPE_A:
- res = box_a(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_BODY:
- res = box_body(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_BR:
- res = box_br(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_BUTTON:
- res = box_button(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_CANVAS:
- res = box_canvas(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_EMBED:
- res = box_embed(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_FRAMESET:
- res = box_frameset(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_IFRAME:
- res = box_iframe(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_IMG:
- res = box_image(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_INPUT:
- res = box_input(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_NOSCRIPT:
- res = box_noscript(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_OBJECT:
- res = box_object(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_PRE:
- res = box_pre(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_SELECT:
- res = box_select(node, content, box, convert_children);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_TEXTAREA:
- res = box_textarea(node, content, box, convert_children);
- break;
-
- default:
- res = true;
- }
-
- return res;
-}
-
-
-/**
* Construct the box tree for an XML element.
*
* \param ctx Tree construction context
diff --git a/content/handlers/html/box_construct.h b/content/handlers/html/box_construct.h
index e93f515e4..f4bd119b1 100644
--- a/content/handlers/html/box_construct.h
+++ b/content/handlers/html/box_construct.h
@@ -19,6 +19,54 @@
/**
* \file
* HTML Box tree construction interface.
+ *
+ * This stage of rendering converts a tree of dom_nodes (produced by libdom)
+ * to a tree of struct box. The box tree represents the structure of the
+ * document as given by the CSS display and float properties.
+ *
+ * For example, consider the following HTML:
+ * \code
+ * <h1>Example Heading</h1>
+ * <p>Example paragraph <em>with emphasised text</em> etc.</p> \endcode
+ *
+ * This would produce approximately the following box tree with default CSS
+ * rules:
+ * \code
+ * BOX_BLOCK (corresponds to h1)
+ * BOX_INLINE_CONTAINER
+ * BOX_INLINE "Example Heading"
+ * BOX_BLOCK (p)
+ * BOX_INLINE_CONTAINER
+ * BOX_INLINE "Example paragraph "
+ * BOX_INLINE "with emphasised text" (em)
+ * BOX_INLINE "etc." \endcode
+ *
+ * Note that the em has been collapsed into the INLINE_CONTAINER.
+ *
+ * If these CSS rules were applied:
+ * \code
+ * h1 { display: table-cell }
+ * p { display: table-cell }
+ * em { float: left; width: 5em } \endcode
+ *
+ * then the box tree would instead look like this:
+ * \code
+ * BOX_TABLE
+ * BOX_TABLE_ROW_GROUP
+ * BOX_TABLE_ROW
+ * BOX_TABLE_CELL (h1)
+ * BOX_INLINE_CONTAINER
+ * BOX_INLINE "Example Heading"
+ * BOX_TABLE_CELL (p)
+ * BOX_INLINE_CONTAINER
+ * BOX_INLINE "Example paragraph "
+ * BOX_FLOAT_LEFT (em)
+ * BOX_BLOCK
+ * BOX_INLINE_CONTAINER
+ * BOX_INLINE "with emphasised text"
+ * BOX_INLINE "etc." \endcode
+ *
+ * Here implied boxes have been added and a float is present.
*/
#ifndef NETSURF_HTML_BOX_CONSTRUCT_H
diff --git a/content/handlers/html/box.c b/content/handlers/html/box_inspect.c
index 0ad10619b..268ed3d95 100644
--- a/content/handlers/html/box.c
+++ b/content/handlers/html/box_inspect.c
@@ -1,8 +1,6 @@
/*
- * Copyright 2005-2007 James Bursa <bursa@users.sourceforge.net>
- * Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
- * Copyright 2005 John M Bell <jmb202@ecs.soton.ac.uk>
* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
@@ -21,276 +19,39 @@
/**
* \file
- * implementation of box tree manipulation.
+ * implementation of box tree inspection.
*/
-#include <assert.h>
-#include <stdbool.h>
#include <stdio.h>
-#include <string.h>
#include <dom/dom.h>
-#include "utils/nsoption.h"
-#include "utils/log.h"
-#include "utils/talloc.h"
#include "utils/nsurl.h"
-#include "netsurf/misc.h"
+#include "utils/errors.h"
+#include "netsurf/types.h"
#include "netsurf/content.h"
#include "netsurf/mouse.h"
#include "css/utils.h"
#include "css/dump.h"
#include "desktop/scrollbar.h"
-#include "desktop/gui_internal.h"
-#include "desktop/search.h"
#include "html/box.h"
-#include "html/form_internal.h"
+#include "html/box_inspect.h"
#include "html/html_internal.h"
-#include "html/interaction.h"
-
-#define box_is_float(box) (box->type == BOX_FLOAT_LEFT || \
- box->type == BOX_FLOAT_RIGHT)
/**
- * Destructor for box nodes which own styles
- *
- * \param b The box being destroyed.
- * \return 0 to allow talloc to continue destroying the tree.
+ * Direction to move in a box-tree walk
*/
-static int box_talloc_destructor(struct box *b)
-{
- struct html_scrollbar_data *data;
-
- if ((b->flags & STYLE_OWNED) && b->style != NULL) {
- css_computed_style_destroy(b->style);
- b->style = NULL;
- }
-
- if (b->styles != NULL) {
- css_select_results_destroy(b->styles);
- b->styles = NULL;
- }
-
- if (b->href != NULL)
- nsurl_unref(b->href);
-
- if (b->id != NULL) {
- lwc_string_unref(b->id);
- }
-
- if (b->node != NULL) {
- dom_node_unref(b->node);
- }
-
- if (b->scroll_x != NULL) {
- data = scrollbar_get_data(b->scroll_x);
- scrollbar_destroy(b->scroll_x);
- free(data);
- }
-
- if (b->scroll_y != NULL) {
- data = scrollbar_get_data(b->scroll_y);
- scrollbar_destroy(b->scroll_y);
- free(data);
- }
-
- return 0;
-}
-
-
-/* Exported function documented in html/box.h */
-struct box *
-box_create(css_select_results *styles,
- css_computed_style *style,
- bool style_owned,
- nsurl *href,
- const char *target,
- const char *title,
- lwc_string *id,
- void *context)
-{
- unsigned int i;
- struct box *box;
-
- box = talloc(context, struct box);
- if (!box) {
- return 0;
- }
-
- talloc_set_destructor(box, box_talloc_destructor);
-
- box->type = BOX_INLINE;
- box->flags = 0;
- box->flags = style_owned ? (box->flags | STYLE_OWNED) : box->flags;
- box->styles = styles;
- box->style = style;
- box->x = box->y = 0;
- box->width = UNKNOWN_WIDTH;
- box->height = 0;
- box->descendant_x0 = box->descendant_y0 = 0;
- box->descendant_x1 = box->descendant_y1 = 0;
- for (i = 0; i != 4; i++)
- box->margin[i] = box->padding[i] = box->border[i].width = 0;
- box->scroll_x = box->scroll_y = NULL;
- box->min_width = 0;
- box->max_width = UNKNOWN_MAX_WIDTH;
- box->byte_offset = 0;
- box->text = NULL;
- box->length = 0;
- box->space = 0;
- box->href = (href == NULL) ? NULL : nsurl_ref(href);
- box->target = target;
- box->title = title;
- box->columns = 1;
- box->rows = 1;
- box->start_column = 0;
- box->next = NULL;
- box->prev = NULL;
- box->children = NULL;
- box->last = NULL;
- box->parent = NULL;
- box->inline_end = NULL;
- box->float_children = NULL;
- box->float_container = NULL;
- box->next_float = NULL;
- box->cached_place_below_level = 0;
- box->list_marker = NULL;
- box->col = NULL;
- box->gadget = NULL;
- box->usemap = NULL;
- box->id = id;
- box->background = NULL;
- box->object = NULL;
- box->object_params = NULL;
- box->iframe = NULL;
- box->node = NULL;
-
- return box;
-}
-
-
-/* Exported function documented in html/box.h */
-void box_add_child(struct box *parent, struct box *child)
-{
- assert(parent);
- assert(child);
-
- if (parent->children != 0) { /* has children already */
- parent->last->next = child;
- child->prev = parent->last;
- } else { /* this is the first child */
- parent->children = child;
- child->prev = 0;
- }
-
- parent->last = child;
- child->parent = parent;
-}
-
-
-/* Exported function documented in html/box.h */
-void box_insert_sibling(struct box *box, struct box *new_box)
-{
- new_box->parent = box->parent;
- new_box->prev = box;
- new_box->next = box->next;
- box->next = new_box;
- if (new_box->next)
- new_box->next->prev = new_box;
- else if (new_box->parent)
- new_box->parent->last = new_box;
-}
-
-
-/* Exported function documented in html/box.h */
-void box_unlink_and_free(struct box *box)
-{
- struct box *parent = box->parent;
- struct box *next = box->next;
- struct box *prev = box->prev;
-
- if (parent) {
- if (parent->children == box)
- parent->children = next;
- if (parent->last == box)
- parent->last = next ? next : prev;
- }
-
- if (prev)
- prev->next = next;
- if (next)
- next->prev = prev;
-
- box_free(box);
-}
-
-
-/* Exported function documented in html/box.h */
-void box_free(struct box *box)
-{
- struct box *child, *next;
-
- /* free children first */
- for (child = box->children; child; child = next) {
- next = child->next;
- box_free(child);
- }
-
- /* last this box */
- box_free_box(box);
-}
-
-
-/* Exported function documented in html/box.h */
-void box_free_box(struct box *box)
-{
- if (!(box->flags & CLONE)) {
- if (box->gadget)
- form_free_control(box->gadget);
- if (box->scroll_x != NULL)
- scrollbar_destroy(box->scroll_x);
- if (box->scroll_y != NULL)
- scrollbar_destroy(box->scroll_y);
- if (box->styles != NULL)
- css_select_results_destroy(box->styles);
- }
-
- talloc_free(box);
-}
-
-
-/* Exported function documented in html/box.h */
-void box_coords(struct box *box, int *x, int *y)
-{
- *x = box->x;
- *y = box->y;
- while (box->parent) {
- if (box_is_float(box)) {
- assert(box->float_container);
- box = box->float_container;
- } else {
- box = box->parent;
- }
- *x += box->x - scrollbar_get_offset(box->scroll_x);
- *y += box->y - scrollbar_get_offset(box->scroll_y);
- }
-}
-
-
-/* Exported function documented in html/box.h */
-void box_bounds(struct box *box, struct rect *r)
-{
- int width, height;
-
- box_coords(box, &r->x0, &r->y0);
-
- width = box->padding[LEFT] + box->width + box->padding[RIGHT];
- height = box->padding[TOP] + box->height + box->padding[BOTTOM];
-
- r->x1 = r->x0 + width;
- r->y1 = r->y0 + height;
-}
+enum box_walk_dir {
+ BOX_WALK_CHILDREN,
+ BOX_WALK_PARENT,
+ BOX_WALK_NEXT_SIBLING,
+ BOX_WALK_FLOAT_CHILDREN,
+ BOX_WALK_NEXT_FLOAT_SIBLING,
+ BOX_WALK_FLOAT_CONTAINER
+};
+#define box_is_float(box) (box->type == BOX_FLOAT_LEFT || \
+ box->type == BOX_FLOAT_RIGHT)
/**
* Determine if a point lies within a box.
@@ -309,60 +70,61 @@ void box_bounds(struct box *box, struct rect *r)
*
* This is a helper function for box_at_point().
*/
-static bool box_contains_point(
- const nscss_len_ctx *len_ctx,
- const struct box *box,
- int x,
- int y,
- bool *physically)
+static bool
+box_contains_point(const nscss_len_ctx *len_ctx,
+ const struct box *box,
+ int x,
+ int y,
+ bool *physically)
{
css_computed_clip_rect css_rect;
if (box->style != NULL &&
- css_computed_position(box->style) ==
- CSS_POSITION_ABSOLUTE &&
- css_computed_clip(box->style, &css_rect) ==
- CSS_CLIP_RECT) {
+ css_computed_position(box->style) == CSS_POSITION_ABSOLUTE &&
+ css_computed_clip(box->style, &css_rect) == CSS_CLIP_RECT) {
/* We have an absolutly positioned box with a clip rect */
struct rect r = {
- .x0 = box->border[LEFT].width,
- .y0 = box->border[TOP].width,
- .x1 = box->padding[LEFT] + box->width +
- box->border[RIGHT].width +
- box->padding[RIGHT],
- .y1 = box->padding[TOP] + box->height +
- box->border[BOTTOM].width +
- box->padding[BOTTOM]
+ .x0 = box->border[LEFT].width,
+ .y0 = box->border[TOP].width,
+ .x1 = box->padding[LEFT] + box->width +
+ box->border[RIGHT].width +
+ box->padding[RIGHT],
+ .y1 = box->padding[TOP] + box->height +
+ box->border[BOTTOM].width +
+ box->padding[BOTTOM]
};
- if (x >= r.x0 && x < r.x1 && y >= r.y0 && y < r.y1)
+ if (x >= r.x0 && x < r.x1 && y >= r.y0 && y < r.y1) {
*physically = true;
- else
+ } else {
*physically = false;
+ }
/* Adjust rect to css clip region */
if (css_rect.left_auto == false) {
r.x0 += FIXTOINT(nscss_len2px(len_ctx,
- css_rect.left, css_rect.lunit,
- box->style));
+ css_rect.left,
+ css_rect.lunit,
+ box->style));
}
if (css_rect.top_auto == false) {
r.y0 += FIXTOINT(nscss_len2px(len_ctx,
- css_rect.top, css_rect.tunit,
- box->style));
+ css_rect.top,
+ css_rect.tunit,
+ box->style));
}
if (css_rect.right_auto == false) {
r.x1 = box->border[LEFT].width +
- FIXTOINT(nscss_len2px(len_ctx,
- css_rect.right,
- css_rect.runit,
- box->style));
+ FIXTOINT(nscss_len2px(len_ctx,
+ css_rect.right,
+ css_rect.runit,
+ box->style));
}
if (css_rect.bottom_auto == false) {
r.y1 = box->border[TOP].width +
- FIXTOINT(nscss_len2px(len_ctx,
- css_rect.bottom,
- css_rect.bunit,
- box->style));
+ FIXTOINT(nscss_len2px(len_ctx,
+ css_rect.bottom,
+ css_rect.bunit,
+ box->style));
}
/* Test if point is in clipped box */
@@ -375,43 +137,43 @@ static bool box_contains_point(
return false;
}
if (x >= -box->border[LEFT].width &&
- x < box->padding[LEFT] + box->width +
- box->padding[RIGHT] + box->border[RIGHT].width &&
- y >= -box->border[TOP].width &&
- y < box->padding[TOP] + box->height +
- box->padding[BOTTOM] + box->border[BOTTOM].width) {
+ x < box->padding[LEFT] + box->width +
+ box->padding[RIGHT] + box->border[RIGHT].width &&
+ y >= -box->border[TOP].width &&
+ y < box->padding[TOP] + box->height +
+ box->padding[BOTTOM] + box->border[BOTTOM].width) {
*physically = true;
return true;
}
if (box->list_marker && box->list_marker->x - box->x <= x +
- box->list_marker->border[LEFT].width &&
- x < box->list_marker->x - box->x +
- box->list_marker->padding[LEFT] +
- box->list_marker->width +
- box->list_marker->border[RIGHT].width +
- box->list_marker->padding[RIGHT] &&
- box->list_marker->y - box->y <= y +
- box->list_marker->border[TOP].width &&
- y < box->list_marker->y - box->y +
- box->list_marker->padding[TOP] +
- box->list_marker->height +
- box->list_marker->border[BOTTOM].width +
- box->list_marker->padding[BOTTOM]) {
+ box->list_marker->border[LEFT].width &&
+ x < box->list_marker->x - box->x +
+ box->list_marker->padding[LEFT] +
+ box->list_marker->width +
+ box->list_marker->border[RIGHT].width +
+ box->list_marker->padding[RIGHT] &&
+ box->list_marker->y - box->y <= y +
+ box->list_marker->border[TOP].width &&
+ y < box->list_marker->y - box->y +
+ box->list_marker->padding[TOP] +
+ box->list_marker->height +
+ box->list_marker->border[BOTTOM].width +
+ box->list_marker->padding[BOTTOM]) {
*physically = true;
return true;
}
if ((box->style && css_computed_overflow_x(box->style) ==
- CSS_OVERFLOW_VISIBLE) || !box->style) {
+ CSS_OVERFLOW_VISIBLE) || !box->style) {
if (box->descendant_x0 <= x &&
- x < box->descendant_x1) {
+ x < box->descendant_x1) {
*physically = false;
return true;
}
}
if ((box->style && css_computed_overflow_y(box->style) ==
- CSS_OVERFLOW_VISIBLE) || !box->style) {
+ CSS_OVERFLOW_VISIBLE) || !box->style) {
if (box->descendant_y0 <= y &&
- y < box->descendant_y1) {
+ y < box->descendant_y1) {
*physically = false;
return true;
}
@@ -421,25 +183,12 @@ static bool box_contains_point(
/**
- * Direction to move in a box-tree walk
- */
-enum box_walk_dir {
- BOX_WALK_CHILDREN,
- BOX_WALK_PARENT,
- BOX_WALK_NEXT_SIBLING,
- BOX_WALK_FLOAT_CHILDREN,
- BOX_WALK_NEXT_FLOAT_SIBLING,
- BOX_WALK_FLOAT_CONTAINER
-};
-
-
-/**
* Move from box to next box in given direction, adjusting for box coord change
*
- * \param b box to move from from
- * \param dir direction to move in
- * \param x box's global x-coord, updated to position of next box
- * \param y box's global y-coord, updated to position of next box
+ * \param b box to move from from
+ * \param dir direction to move in
+ * \param x box's global x-coord, updated to position of next box
+ * \param y box's global y-coord, updated to position of next box
*
* If no box can be found in given direction, NULL is returned.
*/
@@ -525,8 +274,8 @@ box_move_xy(struct box *b, enum box_walk_dir dir, int *x, int *y)
* This walks to a boxes float children before its children. When walking
* children, floating boxes are skipped.
*/
-static inline struct box *box_next_xy(struct box *b, int *x, int *y,
- bool skip_children)
+static inline struct box *
+box_next_xy(struct box *b, int *x, int *y, bool skip_children)
{
struct box *n;
int tx, ty;
@@ -546,7 +295,7 @@ static inline struct box *box_next_xy(struct box *b, int *x, int *y,
*y = ty;
return n;
}
-done_float_children:
+ done_float_children:
tx = *x; ty = *y;
n = box_move_xy(b, BOX_WALK_CHILDREN, &tx, &ty);
@@ -557,7 +306,7 @@ done_float_children:
return n;
}
-skip_children:
+ skip_children:
tx = *x; ty = *y;
n = box_move_xy(b, BOX_WALK_NEXT_FLOAT_SIBLING, &tx, &ty);
if (n) {
@@ -616,38 +365,6 @@ skip_children:
}
-/* Exported function documented in html/box.h */
-struct box *
-box_at_point(const nscss_len_ctx *len_ctx,
- struct box *box,
- const int x, const int y,
- int *box_x, int *box_y)
-{
- bool skip_children;
- bool physically;
-
- assert(box);
-
- skip_children = false;
- while ((box = box_next_xy(box, box_x, box_y, skip_children))) {
- if (box_contains_point(len_ctx, box, x - *box_x, y - *box_y,
- &physically)) {
- *box_x -= scrollbar_get_offset(box->scroll_x);
- *box_y -= scrollbar_get_offset(box->scroll_y);
-
- if (physically)
- return box;
-
- skip_children = false;
- } else {
- skip_children = true;
- }
- }
-
- return NULL;
-}
-
-
/**
* Check whether box is nearer mouse coordinates than current nearest box
*
@@ -746,9 +463,15 @@ box_nearer_text_box(struct box *box,
* updated if a descendant of box is nearer than old nearest
* \return true if mouse point is inside text_box
*/
-static bool box_nearest_text_box(struct box *box, int bx, int by,
- int fx, int fy, int x, int y, int dir, struct box **nearest,
- int *tx, int *ty, int *nr_xd, int *nr_yd)
+static bool
+box_nearest_text_box(struct box *box,
+ int bx, int by,
+ int fx, int fy,
+ int x, int y,
+ int dir,
+ struct box **nearest,
+ int *tx, int *ty,
+ int *nr_xd, int *nr_yd)
{
struct box *child = box->children;
int c_bx, c_by;
@@ -771,16 +494,16 @@ static bool box_nearest_text_box(struct box *box, int bx, int by,
while (child) {
if (child->type == BOX_FLOAT_LEFT ||
- child->type == BOX_FLOAT_RIGHT) {
+ child->type == BOX_FLOAT_RIGHT) {
c_bx = fx + child->x -
- scrollbar_get_offset(child->scroll_x);
+ scrollbar_get_offset(child->scroll_x);
c_by = fy + child->y -
- scrollbar_get_offset(child->scroll_y);
+ scrollbar_get_offset(child->scroll_y);
} else {
c_bx = bx + child->x -
- scrollbar_get_offset(child->scroll_x);
+ scrollbar_get_offset(child->scroll_x);
c_by = by + child->y -
- scrollbar_get_offset(child->scroll_y);
+ scrollbar_get_offset(child->scroll_y);
}
if (child->float_children) {
c_fx = c_bx;
@@ -791,8 +514,8 @@ static bool box_nearest_text_box(struct box *box, int bx, int by,
}
if (in_box && child->text && !child->object) {
if (box_nearer_text_box(child,
- c_bx, c_by, x, y, dir, nearest,
- tx, ty, nr_xd, nr_yd))
+ c_bx, c_by, x, y, dir, nearest,
+ tx, ty, nr_xd, nr_yd))
return true;
} else {
if (child->list_marker) {
@@ -805,8 +528,9 @@ static bool box_nearest_text_box(struct box *box, int bx, int by,
return true;
}
if (box_nearest_text_box(child, c_bx, c_by,
- c_fx, c_fy, x, y, dir, nearest, tx, ty,
- nr_xd, nr_yd))
+ c_fx, c_fy,
+ x, y, dir, nearest, tx, ty,
+ nr_xd, nr_yd))
return true;
}
child = child->next;
@@ -817,55 +541,67 @@ static bool box_nearest_text_box(struct box *box, int bx, int by,
/* Exported function documented in html/box.h */
-struct box *
-box_pick_text_box(struct html_content *html,
- int x, int y,
- int dir,
- int *dx, int *dy)
+void box_coords(struct box *box, int *x, int *y)
{
- struct box *text_box = NULL;
- struct box *box;
- int nr_xd, nr_yd;
- int bx, by;
- int fx, fy;
- int tx, ty;
+ *x = box->x;
+ *y = box->y;
+ while (box->parent) {
+ if (box_is_float(box)) {
+ assert(box->float_container);
+ box = box->float_container;
+ } else {
+ box = box->parent;
+ }
+ *x += box->x - scrollbar_get_offset(box->scroll_x);
+ *y += box->y - scrollbar_get_offset(box->scroll_y);
+ }
+}
- if (html == NULL)
- return NULL;
- box = html->layout;
- bx = box->margin[LEFT];
- by = box->margin[TOP];
- fx = bx;
- fy = by;
+/* Exported function documented in html/box.h */
+void box_bounds(struct box *box, struct rect *r)
+{
+ int width, height;
- if (!box_nearest_text_box(box, bx, by, fx, fy, x, y,
- dir, &text_box, &tx, &ty, &nr_xd, &nr_yd)) {
- if (text_box && text_box->text && !text_box->object) {
- int w = (text_box->padding[LEFT] +
- text_box->width +
- text_box->padding[RIGHT]);
- int h = (text_box->padding[TOP] +
- text_box->height +
- text_box->padding[BOTTOM]);
- int x1, y1;
+ box_coords(box, &r->x0, &r->y0);
- y1 = ty + h;
- x1 = tx + w;
+ width = box->padding[LEFT] + box->width + box->padding[RIGHT];
+ height = box->padding[TOP] + box->height + box->padding[BOTTOM];
- /* ensure point lies within the text box */
- if (x < tx) x = tx;
- if (y < ty) y = ty;
- if (y > y1) y = y1;
- if (x > x1) x = x1;
+ r->x1 = r->x0 + width;
+ r->y1 = r->y0 + height;
+}
+
+
+/* Exported function documented in html/box.h */
+struct box *
+box_at_point(const nscss_len_ctx *len_ctx,
+ struct box *box,
+ const int x, const int y,
+ int *box_x, int *box_y)
+{
+ bool skip_children;
+ bool physically;
+
+ assert(box);
+
+ skip_children = false;
+ while ((box = box_next_xy(box, box_x, box_y, skip_children))) {
+ if (box_contains_point(len_ctx, box, x - *box_x, y - *box_y,
+ &physically)) {
+ *box_x -= scrollbar_get_offset(box->scroll_x);
+ *box_y -= scrollbar_get_offset(box->scroll_y);
+
+ if (physically)
+ return box;
+
+ skip_children = false;
+ } else {
+ skip_children = true;
}
}
- /* return coordinates relative to box */
- *dx = x - tx;
- *dy = y - ty;
-
- return text_box;
+ return NULL;
}
@@ -876,13 +612,15 @@ struct box *box_find_by_id(struct box *box, lwc_string *id)
bool m;
if (box->id != NULL &&
- lwc_string_isequal(id, box->id, &m) == lwc_error_ok &&
- m == true)
+ lwc_string_isequal(id, box->id, &m) == lwc_error_ok &&
+ m == true) {
return box;
+ }
for (a = box->children; a; a = a->next) {
- if ((b = box_find_by_id(a, id)) != NULL)
+ if ((b = box_find_by_id(a, id)) != NULL) {
return b;
+ }
}
return NULL;
@@ -893,9 +631,10 @@ struct box *box_find_by_id(struct box *box, lwc_string *id)
bool box_visible(struct box *box)
{
/* visibility: hidden */
- if (box->style && css_computed_visibility(box->style) ==
- CSS_VISIBILITY_HIDDEN)
+ if (box->style &&
+ css_computed_visibility(box->style) == CSS_VISIBILITY_HIDDEN) {
return false;
+ }
return true;
}
@@ -907,50 +646,92 @@ void box_dump(FILE *stream, struct box *box, unsigned int depth, bool style)
unsigned int i;
struct box *c, *prev;
- for (i = 0; i != depth; i++)
+ for (i = 0; i != depth; i++) {
fprintf(stream, " ");
+ }
fprintf(stream, "%p ", box);
- fprintf(stream, "x%i y%i w%i h%i ", box->x, box->y,
- box->width, box->height);
- if (box->max_width != UNKNOWN_MAX_WIDTH)
+ fprintf(stream, "x%i y%i w%i h%i ",
+ box->x, box->y, box->width, box->height);
+ if (box->max_width != UNKNOWN_MAX_WIDTH) {
fprintf(stream, "min%i max%i ", box->min_width, box->max_width);
+ }
fprintf(stream, "(%i %i %i %i) ",
- box->descendant_x0, box->descendant_y0,
- box->descendant_x1, box->descendant_y1);
+ box->descendant_x0, box->descendant_y0,
+ box->descendant_x1, box->descendant_y1);
fprintf(stream, "m(%i %i %i %i) ",
- box->margin[TOP], box->margin[LEFT],
- box->margin[BOTTOM], box->margin[RIGHT]);
+ box->margin[TOP], box->margin[LEFT],
+ box->margin[BOTTOM], box->margin[RIGHT]);
switch (box->type) {
- case BOX_BLOCK: fprintf(stream, "BLOCK "); break;
- case BOX_INLINE_CONTAINER: fprintf(stream, "INLINE_CONTAINER "); break;
- case BOX_INLINE: fprintf(stream, "INLINE "); break;
- case BOX_INLINE_END: fprintf(stream, "INLINE_END "); break;
- case BOX_INLINE_BLOCK: fprintf(stream, "INLINE_BLOCK "); break;
- case BOX_TABLE: fprintf(stream, "TABLE [columns %i] ",
- box->columns); break;
- case BOX_TABLE_ROW: fprintf(stream, "TABLE_ROW "); break;
- case BOX_TABLE_CELL: fprintf(stream, "TABLE_CELL [columns %i, "
- "start %i, rows %i] ", box->columns,
- box->start_column, box->rows); break;
- case BOX_TABLE_ROW_GROUP: fprintf(stream, "TABLE_ROW_GROUP "); break;
- case BOX_FLOAT_LEFT: fprintf(stream, "FLOAT_LEFT "); break;
- case BOX_FLOAT_RIGHT: fprintf(stream, "FLOAT_RIGHT "); break;
- case BOX_BR: fprintf(stream, "BR "); break;
- case BOX_TEXT: fprintf(stream, "TEXT "); break;
- default: fprintf(stream, "Unknown box type ");
+ case BOX_BLOCK:
+ fprintf(stream, "BLOCK ");
+ break;
+
+ case BOX_INLINE_CONTAINER:
+ fprintf(stream, "INLINE_CONTAINER ");
+ break;
+
+ case BOX_INLINE:
+ fprintf(stream, "INLINE ");
+ break;
+
+ case BOX_INLINE_END:
+ fprintf(stream, "INLINE_END ");
+ break;
+
+ case BOX_INLINE_BLOCK:
+ fprintf(stream, "INLINE_BLOCK ");
+ break;
+
+ case BOX_TABLE:
+ fprintf(stream, "TABLE [columns %i] ", box->columns);
+ break;
+
+ case BOX_TABLE_ROW:
+ fprintf(stream, "TABLE_ROW ");
+ break;
+
+ case BOX_TABLE_CELL:
+ fprintf(stream, "TABLE_CELL [columns %i, start %i, rows %i] ",
+ box->columns,
+ box->start_column,
+ box->rows);
+ break;
+
+ case BOX_TABLE_ROW_GROUP:
+ fprintf(stream, "TABLE_ROW_GROUP ");
+ break;
+
+ case BOX_FLOAT_LEFT:
+ fprintf(stream, "FLOAT_LEFT ");
+ break;
+
+ case BOX_FLOAT_RIGHT:
+ fprintf(stream, "FLOAT_RIGHT ");
+ break;
+
+ case BOX_BR:
+ fprintf(stream, "BR ");
+ break;
+
+ case BOX_TEXT:
+ fprintf(stream, "TEXT ");
+ break;
+
+ default:
+ fprintf(stream, "Unknown box type ");
}
if (box->text)
fprintf(stream, "%li '%.*s' ", (unsigned long) box->byte_offset,
- (int) box->length, box->text);
+ (int) box->length, box->text);
if (box->space)
fprintf(stream, "space ");
if (box->object) {
fprintf(stream, "(object '%s') ",
- nsurl_access(hlcache_handle_get_url(box->object)));
+ nsurl_access(hlcache_handle_get_url(box->object)));
}
if (box->iframe) {
fprintf(stream, "(iframe) ");
@@ -977,16 +758,23 @@ void box_dump(FILE *stream, struct box *box, unsigned int depth, bool style)
fprintf(stream, " float_container %p", box->float_container);
if (box->col) {
fprintf(stream, " (columns");
- for (i = 0; i != box->columns; i++)
+ for (i = 0; i != box->columns; i++) {
fprintf(stream, " (%s %s %i %i %i)",
- ((const char *[]) {"UNKNOWN", "FIXED",
- "AUTO", "PERCENT", "RELATIVE"})
- [box->col[i].type],
- ((const char *[]) {"normal",
+ ((const char *[]) {
+ "UNKNOWN",
+ "FIXED",
+ "AUTO",
+ "PERCENT",
+ "RELATIVE"
+ })
+ [box->col[i].type],
+ ((const char *[]) {
+ "normal",
"positioned"})
- [box->col[i].positioned],
- box->col[i].width,
- box->col[i].min, box->col[i].max);
+ [box->col[i].positioned],
+ box->col[i].width,
+ box->col[i].min, box->col[i].max);
+ }
fprintf(stream, ")");
}
if (box->node != NULL) {
@@ -1009,133 +797,89 @@ void box_dump(FILE *stream, struct box *box, unsigned int depth, bool style)
;
if (box->last != c)
fprintf(stream, "warning: box->last %p (should be %p) "
- "(box %p)\n", box->last, c, box);
+ "(box %p)\n", box->last, c, box);
for (prev = 0, c = box->children; c; prev = c, c = c->next) {
if (c->parent != box)
fprintf(stream, "warning: box->parent %p (should be "
- "%p) (box on next line)\n",
- c->parent, box);
+ "%p) (box on next line)\n",
+ c->parent, box);
if (c->prev != prev)
fprintf(stream, "warning: box->prev %p (should be "
- "%p) (box on next line)\n",
- c->prev, prev);
+ "%p) (box on next line)\n",
+ c->prev, prev);
box_dump(stream, c, depth + 1, style);
}
}
/* exported interface documented in html/box.h */
-nserror
-box_handle_scrollbars(struct content *c,
- struct box *box,
- bool bottom,
- bool right)
+bool box_vscrollbar_present(const struct box * const box)
{
- struct html_scrollbar_data *data;
- int visible_width, visible_height;
- int full_width, full_height;
- nserror res;
-
- if (!bottom && box->scroll_x != NULL) {
- data = scrollbar_get_data(box->scroll_x);
- scrollbar_destroy(box->scroll_x);
- free(data);
- box->scroll_x = NULL;
- }
-
- if (!right && box->scroll_y != NULL) {
- data = scrollbar_get_data(box->scroll_y);
- scrollbar_destroy(box->scroll_y);
- free(data);
- box->scroll_y = NULL;
- }
-
- if (!bottom && !right) {
- return NSERROR_OK;
- }
-
- visible_width = box->width + box->padding[RIGHT] + box->padding[LEFT];
- visible_height = box->height + box->padding[TOP] + box->padding[BOTTOM];
-
- full_width = ((box->descendant_x1 - box->border[RIGHT].width) >
- visible_width) ?
- box->descendant_x1 + box->padding[RIGHT] :
- visible_width;
- full_height = ((box->descendant_y1 - box->border[BOTTOM].width) >
- visible_height) ?
- box->descendant_y1 + box->padding[BOTTOM] :
- visible_height;
-
- if (right) {
- if (box->scroll_y == NULL) {
- data = malloc(sizeof(struct html_scrollbar_data));
- if (data == NULL) {
- return NSERROR_NOMEM;
- }
- data->c = c;
- data->box = box;
- res = scrollbar_create(false,
- visible_height,
- full_height,
- visible_height,
- data,
- html_overflow_scroll_callback,
- &(box->scroll_y));
- if (res != NSERROR_OK) {
- return res;
- }
- } else {
- scrollbar_set_extents(box->scroll_y,
- visible_height,
- visible_height,
- full_height);
- }
- }
- if (bottom) {
- if (box->scroll_x == NULL) {
- data = malloc(sizeof(struct html_scrollbar_data));
- if (data == NULL) {
- return NSERROR_OK;
- }
- data->c = c;
- data->box = box;
- res = scrollbar_create(true,
- visible_width - (right ? SCROLLBAR_WIDTH : 0),
- full_width,
- visible_width,
- data,
- html_overflow_scroll_callback,
- &box->scroll_x);
- if (res != NSERROR_OK) {
- return res;
- }
- } else {
- scrollbar_set_extents(box->scroll_x,
- visible_width -
- (right ? SCROLLBAR_WIDTH : 0),
- visible_width, full_width);
- }
- }
-
- if (right && bottom) {
- scrollbar_make_pair(box->scroll_x, box->scroll_y);
- }
-
- return NSERROR_OK;
+ return box->padding[TOP] +
+ box->height +
+ box->padding[BOTTOM] +
+ box->border[BOTTOM].width < box->descendant_y1;
}
/* exported interface documented in html/box.h */
-bool box_vscrollbar_present(const struct box * const box)
+bool box_hscrollbar_present(const struct box * const box)
{
- return box->padding[TOP] + box->height + box->padding[BOTTOM] +
- box->border[BOTTOM].width < box->descendant_y1;
+ return box->padding[LEFT] +
+ box->width +
+ box->padding[RIGHT] +
+ box->border[RIGHT].width < box->descendant_x1;
}
-/* exported interface documented in html/box.h */
-bool box_hscrollbar_present(const struct box * const box)
+/* Exported function documented in html/box.h */
+struct box *
+box_pick_text_box(struct html_content *html,
+ int x, int y,
+ int dir,
+ int *dx, int *dy)
{
- return box->padding[LEFT] + box->width + box->padding[RIGHT] +
- box->border[RIGHT].width < box->descendant_x1;
+ struct box *text_box = NULL;
+ struct box *box;
+ int nr_xd, nr_yd;
+ int bx, by;
+ int fx, fy;
+ int tx, ty;
+
+ if (html == NULL)
+ return NULL;
+
+ box = html->layout;
+ bx = box->margin[LEFT];
+ by = box->margin[TOP];
+ fx = bx;
+ fy = by;
+
+ if (!box_nearest_text_box(box, bx, by, fx, fy, x, y,
+ dir, &text_box, &tx, &ty, &nr_xd, &nr_yd)) {
+ if (text_box && text_box->text && !text_box->object) {
+ int w = (text_box->padding[LEFT] +
+ text_box->width +
+ text_box->padding[RIGHT]);
+ int h = (text_box->padding[TOP] +
+ text_box->height +
+ text_box->padding[BOTTOM]);
+ int x1, y1;
+
+ y1 = ty + h;
+ x1 = tx + w;
+
+ /* ensure point lies within the text box */
+ if (x < tx) x = tx;
+ if (y < ty) y = ty;
+ if (y > y1) y = y1;
+ if (x > x1) x = x1;
+ }
+ }
+
+ /* return coordinates relative to box */
+ *dx = x - tx;
+ *dy = y - ty;
+
+ return text_box;
}
diff --git a/content/handlers/html/box_inspect.h b/content/handlers/html/box_inspect.h
new file mode 100644
index 000000000..d50b84813
--- /dev/null
+++ b/content/handlers/html/box_inspect.h
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * HTML Box tree inspection interface.
+ */
+
+#ifndef NETSURF_HTML_BOX_INSPECT_H
+#define NETSURF_HTML_BOX_INSPECT_H
+
+/**
+ * Find the absolute coordinates of a box.
+ *
+ * \param box the box to calculate coordinates of
+ * \param x updated to x coordinate
+ * \param y updated to y coordinate
+ */
+void box_coords(struct box *box, int *x, int *y);
+
+
+/**
+ * Find the bounds of a box.
+ *
+ * \param box the box to calculate bounds of
+ * \param r receives bounds
+ */
+void box_bounds(struct box *box, struct rect *r);
+
+
+/**
+ * Find the boxes at a point.
+ *
+ * \param len_ctx CSS length conversion context for document.
+ * \param box box to search children of
+ * \param x point to find, in global document coordinates
+ * \param y point to find, in global document coordinates
+ * \param box_x position of box, in global document coordinates, updated
+ * to position of returned box, if any
+ * \param box_y position of box, in global document coordinates, updated
+ * to position of returned box, if any
+ * \return box at given point, or 0 if none found
+ *
+ * To find all the boxes in the hierarchy at a certain point, use code like
+ * this:
+ * \code
+ * struct box *box = top_of_document_to_search;
+ * int box_x = 0, box_y = 0;
+ *
+ * while ((box = box_at_point(len_ctx, box, x, y, &box_x, &box_y))) {
+ * // process box
+ * }
+ * \endcode
+ */
+struct box *box_at_point(const nscss_len_ctx *len_ctx, struct box *box, const int x, const int y, int *box_x, int *box_y);
+
+
+/**
+ * Find a box based upon its id attribute.
+ *
+ * \param box box tree to search
+ * \param id id to look for
+ * \return the box or 0 if not found
+ */
+struct box *box_find_by_id(struct box *box, lwc_string *id);
+
+
+/**
+ * Determine if a box is visible when the tree is rendered.
+ *
+ * \param box box to check
+ * \return true iff the box is rendered
+ */
+bool box_visible(struct box *box);
+
+
+/**
+ * Print a box tree to a file.
+ */
+void box_dump(FILE *stream, struct box *box, unsigned int depth, bool style);
+
+
+/**
+ * Determine if a box has a vertical scrollbar.
+ *
+ * \param box scrolling box
+ * \return the box has a vertical scrollbar
+ */
+bool box_vscrollbar_present(const struct box *box);
+
+
+/**
+ * Determine if a box has a horizontal scrollbar.
+ *
+ * \param box scrolling box
+ * \return the box has a horizontal scrollbar
+ */
+bool box_hscrollbar_present(const struct box *box);
+
+
+/**
+ * Peform pick text on browser window contents to locate the box under
+ * the mouse pointer, or nearest in the given direction if the pointer is
+ * not over a text box.
+ *
+ * \param html an HTML content
+ * \param x coordinate of mouse
+ * \param y coordinate of mouse
+ * \param dir direction to search (-1 = above-left, +1 = below-right)
+ * \param dx receives x ordinate of mouse relative to text box
+ * \param dy receives y ordinate of mouse relative to text box
+ */
+struct box *box_pick_text_box(struct html_content *html, int x, int y, int dir, int *dx, int *dy);
+
+
+/**
+ * Check if layout box is a first child.
+ *
+ * \param[in] b Box to check.
+ * \return true iff box is first child.
+ */
+static inline bool box_is_first_child(struct box *b)
+{
+ return (b->parent == NULL || b == b->parent->children);
+}
+
+
+#endif
diff --git a/content/handlers/html/box_manipulate.c b/content/handlers/html/box_manipulate.c
new file mode 100644
index 000000000..0bc1c9fea
--- /dev/null
+++ b/content/handlers/html/box_manipulate.c
@@ -0,0 +1,350 @@
+/*
+ * Copyright 2005-2007 James Bursa <bursa@users.sourceforge.net>
+ * Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
+ * Copyright 2005 John M Bell <jmb202@ecs.soton.ac.uk>
+ * Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * implementation of box tree manipulation.
+ */
+
+
+#include "utils/errors.h"
+#include "utils/talloc.h"
+#include "netsurf/types.h"
+#include "netsurf/mouse.h"
+#include "desktop/scrollbar.h"
+
+#include "html/box.h"
+#include "html/box_manipulate.h"
+#include "html/form_internal.h"
+#include "html/html_internal.h"
+#include "html/interaction.h"
+
+
+/**
+ * Destructor for box nodes which own styles
+ *
+ * \param b The box being destroyed.
+ * \return 0 to allow talloc to continue destroying the tree.
+ */
+static int box_talloc_destructor(struct box *b)
+{
+ struct html_scrollbar_data *data;
+
+ if ((b->flags & STYLE_OWNED) && b->style != NULL) {
+ css_computed_style_destroy(b->style);
+ b->style = NULL;
+ }
+
+ if (b->styles != NULL) {
+ css_select_results_destroy(b->styles);
+ b->styles = NULL;
+ }
+
+ if (b->href != NULL)
+ nsurl_unref(b->href);
+
+ if (b->id != NULL) {
+ lwc_string_unref(b->id);
+ }
+
+ if (b->node != NULL) {
+ dom_node_unref(b->node);
+ }
+
+ if (b->scroll_x != NULL) {
+ data = scrollbar_get_data(b->scroll_x);
+ scrollbar_destroy(b->scroll_x);
+ free(data);
+ }
+
+ if (b->scroll_y != NULL) {
+ data = scrollbar_get_data(b->scroll_y);
+ scrollbar_destroy(b->scroll_y);
+ free(data);
+ }
+
+ return 0;
+}
+
+
+/* Exported function documented in html/box.h */
+struct box *
+box_create(css_select_results *styles,
+ css_computed_style *style,
+ bool style_owned,
+ nsurl *href,
+ const char *target,
+ const char *title,
+ lwc_string *id,
+ void *context)
+{
+ unsigned int i;
+ struct box *box;
+
+ box = talloc(context, struct box);
+ if (!box) {
+ return 0;
+ }
+
+ talloc_set_destructor(box, box_talloc_destructor);
+
+ box->type = BOX_INLINE;
+ box->flags = 0;
+ box->flags = style_owned ? (box->flags | STYLE_OWNED) : box->flags;
+ box->styles = styles;
+ box->style = style;
+ box->x = box->y = 0;
+ box->width = UNKNOWN_WIDTH;
+ box->height = 0;
+ box->descendant_x0 = box->descendant_y0 = 0;
+ box->descendant_x1 = box->descendant_y1 = 0;
+ for (i = 0; i != 4; i++)
+ box->margin[i] = box->padding[i] = box->border[i].width = 0;
+ box->scroll_x = box->scroll_y = NULL;
+ box->min_width = 0;
+ box->max_width = UNKNOWN_MAX_WIDTH;
+ box->byte_offset = 0;
+ box->text = NULL;
+ box->length = 0;
+ box->space = 0;
+ box->href = (href == NULL) ? NULL : nsurl_ref(href);
+ box->target = target;
+ box->title = title;
+ box->columns = 1;
+ box->rows = 1;
+ box->start_column = 0;
+ box->next = NULL;
+ box->prev = NULL;
+ box->children = NULL;
+ box->last = NULL;
+ box->parent = NULL;
+ box->inline_end = NULL;
+ box->float_children = NULL;
+ box->float_container = NULL;
+ box->next_float = NULL;
+ box->cached_place_below_level = 0;
+ box->list_marker = NULL;
+ box->col = NULL;
+ box->gadget = NULL;
+ box->usemap = NULL;
+ box->id = id;
+ box->background = NULL;
+ box->object = NULL;
+ box->object_params = NULL;
+ box->iframe = NULL;
+ box->node = NULL;
+
+ return box;
+}
+
+
+/* Exported function documented in html/box.h */
+void box_add_child(struct box *parent, struct box *child)
+{
+ assert(parent);
+ assert(child);
+
+ if (parent->children != 0) { /* has children already */
+ parent->last->next = child;
+ child->prev = parent->last;
+ } else { /* this is the first child */
+ parent->children = child;
+ child->prev = 0;
+ }
+
+ parent->last = child;
+ child->parent = parent;
+}
+
+
+/* Exported function documented in html/box.h */
+void box_insert_sibling(struct box *box, struct box *new_box)
+{
+ new_box->parent = box->parent;
+ new_box->prev = box;
+ new_box->next = box->next;
+ box->next = new_box;
+ if (new_box->next)
+ new_box->next->prev = new_box;
+ else if (new_box->parent)
+ new_box->parent->last = new_box;
+}
+
+
+/* Exported function documented in html/box.h */
+void box_unlink_and_free(struct box *box)
+{
+ struct box *parent = box->parent;
+ struct box *next = box->next;
+ struct box *prev = box->prev;
+
+ if (parent) {
+ if (parent->children == box)
+ parent->children = next;
+ if (parent->last == box)
+ parent->last = next ? next : prev;
+ }
+
+ if (prev)
+ prev->next = next;
+ if (next)
+ next->prev = prev;
+
+ box_free(box);
+}
+
+
+/* Exported function documented in html/box.h */
+void box_free(struct box *box)
+{
+ struct box *child, *next;
+
+ /* free children first */
+ for (child = box->children; child; child = next) {
+ next = child->next;
+ box_free(child);
+ }
+
+ /* last this box */
+ box_free_box(box);
+}
+
+
+/* Exported function documented in html/box.h */
+void box_free_box(struct box *box)
+{
+ if (!(box->flags & CLONE)) {
+ if (box->gadget)
+ form_free_control(box->gadget);
+ if (box->scroll_x != NULL)
+ scrollbar_destroy(box->scroll_x);
+ if (box->scroll_y != NULL)
+ scrollbar_destroy(box->scroll_y);
+ if (box->styles != NULL)
+ css_select_results_destroy(box->styles);
+ }
+
+ talloc_free(box);
+}
+
+
+/* exported interface documented in html/box.h */
+nserror
+box_handle_scrollbars(struct content *c,
+ struct box *box,
+ bool bottom,
+ bool right)
+{
+ struct html_scrollbar_data *data;
+ int visible_width, visible_height;
+ int full_width, full_height;
+ nserror res;
+
+ if (!bottom && box->scroll_x != NULL) {
+ data = scrollbar_get_data(box->scroll_x);
+ scrollbar_destroy(box->scroll_x);
+ free(data);
+ box->scroll_x = NULL;
+ }
+
+ if (!right && box->scroll_y != NULL) {
+ data = scrollbar_get_data(box->scroll_y);
+ scrollbar_destroy(box->scroll_y);
+ free(data);
+ box->scroll_y = NULL;
+ }
+
+ if (!bottom && !right) {
+ return NSERROR_OK;
+ }
+
+ visible_width = box->width + box->padding[RIGHT] + box->padding[LEFT];
+ visible_height = box->height + box->padding[TOP] + box->padding[BOTTOM];
+
+ full_width = ((box->descendant_x1 - box->border[RIGHT].width) >
+ visible_width) ?
+ box->descendant_x1 + box->padding[RIGHT] :
+ visible_width;
+ full_height = ((box->descendant_y1 - box->border[BOTTOM].width) >
+ visible_height) ?
+ box->descendant_y1 + box->padding[BOTTOM] :
+ visible_height;
+
+ if (right) {
+ if (box->scroll_y == NULL) {
+ data = malloc(sizeof(struct html_scrollbar_data));
+ if (data == NULL) {
+ return NSERROR_NOMEM;
+ }
+ data->c = c;
+ data->box = box;
+ res = scrollbar_create(false,
+ visible_height,
+ full_height,
+ visible_height,
+ data,
+ html_overflow_scroll_callback,
+ &(box->scroll_y));
+ if (res != NSERROR_OK) {
+ return res;
+ }
+ } else {
+ scrollbar_set_extents(box->scroll_y,
+ visible_height,
+ visible_height,
+ full_height);
+ }
+ }
+ if (bottom) {
+ if (box->scroll_x == NULL) {
+ data = malloc(sizeof(struct html_scrollbar_data));
+ if (data == NULL) {
+ return NSERROR_OK;
+ }
+ data->c = c;
+ data->box = box;
+ res = scrollbar_create(true,
+ visible_width - (right ? SCROLLBAR_WIDTH : 0),
+ full_width,
+ visible_width,
+ data,
+ html_overflow_scroll_callback,
+ &box->scroll_x);
+ if (res != NSERROR_OK) {
+ return res;
+ }
+ } else {
+ scrollbar_set_extents(box->scroll_x,
+ visible_width -
+ (right ? SCROLLBAR_WIDTH : 0),
+ visible_width, full_width);
+ }
+ }
+
+ if (right && bottom) {
+ scrollbar_make_pair(box->scroll_x, box->scroll_y);
+ }
+
+ return NSERROR_OK;
+}
+
+
diff --git a/content/handlers/html/box_manipulate.h b/content/handlers/html/box_manipulate.h
new file mode 100644
index 000000000..43a66a7d9
--- /dev/null
+++ b/content/handlers/html/box_manipulate.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2005 James Bursa <bursa@users.sourceforge.net>
+ * Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * Box tree manipulation interface.
+ */
+
+#ifndef NETSURF_HTML_BOX_MANIPULATE_H
+#define NETSURF_HTML_BOX_MANIPULATE_H
+
+
+/**
+ * Create a box tree node.
+ *
+ * \param styles selection results for the box, or NULL
+ * \param style computed style for the box (not copied), or 0
+ * \param style_owned whether style is owned by this box
+ * \param href href for the box (copied), or 0
+ * \param target target for the box (not copied), or 0
+ * \param title title for the box (not copied), or 0
+ * \param id id for the box (not copied), or 0
+ * \param context context for allocations
+ * \return allocated and initialised box, or 0 on memory exhaustion
+ *
+ * styles is always owned by the box, if it is set.
+ * style is only owned by the box in the case of implied boxes.
+ */
+struct box * box_create(css_select_results *styles, css_computed_style *style, bool style_owned, struct nsurl *href, const char *target, const char *title, lwc_string *id, void *context);
+
+
+/**
+ * Add a child to a box tree node.
+ *
+ * \param parent box giving birth
+ * \param child box to link as last child of parent
+ */
+void box_add_child(struct box *parent, struct box *child);
+
+
+/**
+ * Insert a new box as a sibling to a box in a tree.
+ *
+ * \param box box already in tree
+ * \param new_box box to link into tree as next sibling
+ */
+void box_insert_sibling(struct box *box, struct box *new_box);
+
+
+/**
+ * Unlink a box from the box tree and then free it recursively.
+ *
+ * \param box box to unlink and free recursively.
+ */
+void box_unlink_and_free(struct box *box);
+
+
+/**
+ * Free a box tree recursively.
+ *
+ * \param box box to free recursively
+ *
+ * The box and all its children is freed.
+ */
+void box_free(struct box *box);
+
+
+/**
+ * Free the data in a single box structure.
+ *
+ * \param box box to free
+ */
+void box_free_box(struct box *box);
+
+
+/**
+ * Applies the given scroll setup to a box. This includes scroll
+ * creation/deletion as well as scroll dimension updates.
+ *
+ * \param c content in which the box is located
+ * \param box the box to handle the scrolls for
+ * \param bottom whether the horizontal scrollbar should be present
+ * \param right whether the vertical scrollbar should be present
+ * \return true on success false otherwise
+ */
+nserror box_handle_scrollbars(struct content *c, struct box *box,
+ bool bottom, bool right);
+
+
+#endif
diff --git a/content/handlers/html/box_normalise.c b/content/handlers/html/box_normalise.c
index 03fe731b2..fbdb6cd05 100644
--- a/content/handlers/html/box_normalise.c
+++ b/content/handlers/html/box_normalise.c
@@ -33,6 +33,7 @@
#include "css/select.h"
#include "html/box.h"
+#include "html/box_manipulate.h"
#include "html/box_normalise.h"
#include "html/html_internal.h"
#include "html/table.h"
diff --git a/content/handlers/html/box_normalise.h b/content/handlers/html/box_normalise.h
index 60f259189..591feab8d 100644
--- a/content/handlers/html/box_normalise.h
+++ b/content/handlers/html/box_normalise.h
@@ -19,6 +19,21 @@
/**
* \file
* HTML Box tree normalise interface.
+ *
+ * A box tree is "normalized" if the following is satisfied:
+ * \code
+ * parent permitted child nodes
+ * BLOCK, INLINE_BLOCK BLOCK, INLINE_CONTAINER, TABLE
+ * INLINE_CONTAINER INLINE, INLINE_BLOCK, FLOAT_LEFT, FLOAT_RIGHT, BR, TEXT,
+ * INLINE_END
+ * INLINE none
+ * TABLE at least 1 TABLE_ROW_GROUP
+ * TABLE_ROW_GROUP at least 1 TABLE_ROW
+ * TABLE_ROW at least 1 TABLE_CELL
+ * TABLE_CELL BLOCK, INLINE_CONTAINER, TABLE (same as BLOCK)
+ * FLOAT_(LEFT|RIGHT) exactly 1 BLOCK or TABLE
+ * \endcode
+ *
*/
#ifndef NETSURF_HTML_BOX_NORMALISE_H
diff --git a/content/handlers/html/box_special.c b/content/handlers/html/box_special.c
new file mode 100644
index 000000000..38031ceb1
--- /dev/null
+++ b/content/handlers/html/box_special.c
@@ -0,0 +1,1916 @@
+/*
+ * Copyright 2005 James Bursa <bursa@users.sourceforge.net>
+ * Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
+ * Copyright 2005 John M Bell <jmb202@ecs.soton.ac.uk>
+ * Copyright 2006 Richard Wilson <info@tinct.net>
+ * Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * Implementation of special element handling conversion.
+ */
+
+#include <stdbool.h>
+#include <dom/dom.h>
+
+#include "utils/nsoption.h"
+#include "utils/corestrings.h"
+#include "utils/log.h"
+#include "utils/messages.h"
+#include "utils/talloc.h"
+#include "utils/string.h"
+#include "utils/ascii.h"
+#include "netsurf/plot_style.h"
+#include "css/hints.h"
+#include "desktop/frame_types.h"
+
+#include "html/html.h"
+#include "html/html_internal.h"
+#include "html/box.h"
+#include "html/box_manipulate.h"
+#include "html/box_construct.h"
+#include "html/box_special.h"
+#include "html/box_textarea.h"
+#include "html/form_internal.h"
+
+
+static const content_type image_types = CONTENT_IMAGE;
+
+
+/**
+ * determine if a box is the root node
+ *
+ * \param n node to check
+ * \return true if node is root else false.
+ */
+static inline bool box_is_root(dom_node *n)
+{
+ dom_node *parent;
+ dom_node_type type;
+ dom_exception err;
+
+ err = dom_node_get_parent_node(n, &parent);
+ if (err != DOM_NO_ERR)
+ return false;
+
+ if (parent != NULL) {
+ err = dom_node_get_node_type(parent, &type);
+
+ dom_node_unref(parent);
+
+ if (err != DOM_NO_ERR)
+ return false;
+
+ if (type != DOM_DOCUMENT_NODE)
+ return false;
+ }
+
+ return true;
+}
+
+
+/**
+ * Destructor for object_params, for &lt;object&gt; elements
+ *
+ * \param o The object params being destroyed.
+ * \return 0 to allow talloc to continue destroying the tree.
+ */
+static int box_object_talloc_destructor(struct object_params *o)
+{
+ if (o->codebase != NULL)
+ nsurl_unref(o->codebase);
+ if (o->classid != NULL)
+ nsurl_unref(o->classid);
+ if (o->data != NULL)
+ nsurl_unref(o->data);
+
+ return 0;
+}
+
+
+/**
+ * Parse a multi-length-list, as defined by HTML 4.01.
+ *
+ * \param ds dom string to parse
+ * \param count updated to number of entries
+ * \return array of struct box_multi_length, or 0 on memory exhaustion
+ */
+static struct frame_dimension *
+box_parse_multi_lengths(const dom_string *ds, unsigned int *count)
+{
+ char *end;
+ unsigned int i, n;
+ struct frame_dimension *length;
+ const char *s;
+
+ s = dom_string_data(ds);
+
+ for (i = 0, n = 1; s[i]; i++)
+ if (s[i] == ',')
+ n++;
+
+ length = calloc(n, sizeof(struct frame_dimension));
+ if (!length)
+ return NULL;
+
+ for (i = 0; i != n; i++) {
+ while (ascii_is_space(*s)) {
+ s++;
+ }
+ length[i].value = strtof(s, &end);
+ if (length[i].value <= 0) {
+ length[i].value = 1;
+ }
+ s = end;
+ switch (*s) {
+ case '%':
+ length[i].unit = FRAME_DIMENSION_PERCENT;
+ break;
+ case '*':
+ length[i].unit = FRAME_DIMENSION_RELATIVE;
+ break;
+ default:
+ length[i].unit = FRAME_DIMENSION_PIXELS;
+ break;
+ }
+ while (*s && *s != ',') {
+ s++;
+ }
+ if (*s == ',') {
+ s++;
+ }
+ }
+
+ *count = n;
+ return length;
+}
+
+
+/**
+ * Destructor for content_html_frames, for frame elements
+ *
+ * \param f The frame params being destroyed.
+ * \return 0 to allow talloc to continue destroying the tree.
+ */
+static int box_frames_talloc_destructor(struct content_html_frames *f)
+{
+ if (f->url != NULL) {
+ nsurl_unref(f->url);
+ f->url = NULL;
+ }
+
+ return 0;
+}
+
+
+/**
+ * create a frameset box tree
+ */
+static bool
+box_create_frameset(struct content_html_frames *f,
+ dom_node *n,
+ html_content *content)
+{
+ unsigned int row, col, index, i;
+ unsigned int rows = 1, cols = 1;
+ dom_string *s;
+ dom_exception err;
+ nsurl *url;
+ struct frame_dimension *row_height = 0, *col_width = 0;
+ dom_node *c, *next;
+ struct content_html_frames *frame;
+ bool default_border = true;
+ colour default_border_colour = 0x000000;
+
+ /* parse rows and columns */
+ err = dom_element_get_attribute(n, corestring_dom_rows, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ row_height = box_parse_multi_lengths(s, &rows);
+ dom_string_unref(s);
+ if (row_height == NULL)
+ return false;
+ } else {
+ row_height = calloc(1, sizeof(struct frame_dimension));
+ if (row_height == NULL)
+ return false;
+ row_height->value = 100;
+ row_height->unit = FRAME_DIMENSION_PERCENT;
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_cols, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ col_width = box_parse_multi_lengths(s, &cols);
+ dom_string_unref(s);
+ if (col_width == NULL) {
+ free(row_height);
+ return false;
+ }
+ } else {
+ col_width = calloc(1, sizeof(struct frame_dimension));
+ if (col_width == NULL) {
+ free(row_height);
+ return false;
+ }
+ col_width->value = 100;
+ col_width->unit = FRAME_DIMENSION_PERCENT;
+ }
+
+ /* common extension: border="0|1" to control all children */
+ err = dom_element_get_attribute(n, corestring_dom_border, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ if ((dom_string_data(s)[0] == '0') &&
+ (dom_string_data(s)[1] == '\0'))
+ default_border = false;
+ dom_string_unref(s);
+ }
+
+ /* common extension: frameborder="yes|no" to control all children */
+ err = dom_element_get_attribute(n, corestring_dom_frameborder, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc_no) == 0)
+ default_border = false;
+ dom_string_unref(s);
+ }
+
+ /* common extension: bordercolor="#RRGGBB|<named colour>" to control
+ *all children */
+ err = dom_element_get_attribute(n, corestring_dom_bordercolor, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ css_color color;
+
+ if (nscss_parse_colour(dom_string_data(s), &color))
+ default_border_colour = nscss_color_to_ns(color);
+
+ dom_string_unref(s);
+ }
+
+ /* update frameset and create default children */
+ f->cols = cols;
+ f->rows = rows;
+ f->scrolling = BW_SCROLLING_NO;
+ f->children = talloc_array(content->bctx, struct content_html_frames,
+ (rows * cols));
+
+ talloc_set_destructor(f->children, box_frames_talloc_destructor);
+
+ for (row = 0; row < rows; row++) {
+ for (col = 0; col < cols; col++) {
+ index = (row * cols) + col;
+ frame = &f->children[index];
+ frame->cols = 0;
+ frame->rows = 0;
+ frame->width = col_width[col];
+ frame->height = row_height[row];
+ frame->margin_width = 0;
+ frame->margin_height = 0;
+ frame->name = NULL;
+ frame->url = NULL;
+ frame->no_resize = false;
+ frame->scrolling = BW_SCROLLING_AUTO;
+ frame->border = default_border;
+ frame->border_colour = default_border_colour;
+ frame->children = NULL;
+ }
+ }
+ free(col_width);
+ free(row_height);
+
+ /* create the frameset windows */
+ err = dom_node_get_first_child(n, &c);
+ if (err != DOM_NO_ERR)
+ return false;
+
+ for (row = 0; c != NULL && row < rows; row++) {
+ for (col = 0; c != NULL && col < cols; col++) {
+ while (c != NULL) {
+ dom_node_type type;
+ dom_string *name;
+
+ err = dom_node_get_node_type(c, &type);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ err = dom_node_get_node_name(c, &name);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (type != DOM_ELEMENT_NODE ||
+ (!dom_string_caseless_lwc_isequal(
+ name,
+ corestring_lwc_frame) &&
+ !dom_string_caseless_lwc_isequal(
+ name,
+ corestring_lwc_frameset
+ ))) {
+ err = dom_node_get_next_sibling(c,
+ &next);
+ if (err != DOM_NO_ERR) {
+ dom_string_unref(name);
+ dom_node_unref(c);
+ return false;
+ }
+
+ dom_string_unref(name);
+ dom_node_unref(c);
+ c = next;
+ } else {
+ /* Got a FRAME or FRAMESET element */
+ dom_string_unref(name);
+ break;
+ }
+ }
+
+ if (c == NULL)
+ break;
+
+ /* get current frame */
+ index = (row * cols) + col;
+ frame = &f->children[index];
+
+ /* nest framesets */
+ err = dom_node_get_node_name(c, &s);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc_frameset)) {
+ dom_string_unref(s);
+ frame->border = 0;
+ if (box_create_frameset(frame, c,
+ content) == false) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ err = dom_node_get_next_sibling(c, &next);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ dom_node_unref(c);
+ c = next;
+ continue;
+ }
+
+ dom_string_unref(s);
+
+ /* get frame URL (not required) */
+ url = NULL;
+ err = dom_element_get_attribute(c, corestring_dom_src, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ box_extract_link(content, s, content->base_url,
+ &url);
+ dom_string_unref(s);
+ }
+
+ /* copy url */
+ if (url != NULL) {
+ /* no self-references */
+ if (nsurl_compare(content->base_url, url,
+ NSURL_COMPLETE) == false)
+ frame->url = url;
+ url = NULL;
+ }
+
+ /* fill in specified values */
+ err = dom_element_get_attribute(c, corestring_dom_name, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ frame->name = talloc_strdup(content->bctx,
+ dom_string_data(s));
+ dom_string_unref(s);
+ }
+
+ if (dom_element_has_attribute(c, corestring_dom_noresize,
+ &frame->no_resize) != DOM_NO_ERR) {
+ /* If we can't read the attribute for some reason,
+ * assume we didn't have it.
+ */
+ frame->no_resize = false;
+ }
+
+ err = dom_element_get_attribute(c, corestring_dom_frameborder,
+ &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ i = atoi(dom_string_data(s));
+ frame->border = (i != 0);
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(c, corestring_dom_scrolling, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc_yes))
+ frame->scrolling = BW_SCROLLING_YES;
+ else if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc_no))
+ frame->scrolling = BW_SCROLLING_NO;
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(c, corestring_dom_marginwidth,
+ &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ frame->margin_width = atoi(dom_string_data(s));
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(c, corestring_dom_marginheight,
+ &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ frame->margin_height = atoi(dom_string_data(s));
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(c, corestring_dom_bordercolor,
+ &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ css_color color;
+
+ if (nscss_parse_colour(dom_string_data(s),
+ &color))
+ frame->border_colour =
+ nscss_color_to_ns(color);
+
+ dom_string_unref(s);
+ }
+
+ /* advance */
+ err = dom_node_get_next_sibling(c, &next);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ dom_node_unref(c);
+ c = next;
+ }
+ }
+
+ /* If the last child wasn't a frame, we still need to unref it */
+ if (c != NULL) {
+ dom_node_unref(c);
+ }
+
+ return true;
+}
+
+
+/**
+ * Destructor for content_html_iframe, for &lt;iframe&gt; elements
+ *
+ * \param f The iframe params being destroyed.
+ * \return 0 to allow talloc to continue destroying the tree.
+ */
+static int box_iframes_talloc_destructor(struct content_html_iframe *f)
+{
+ if (f->url != NULL) {
+ nsurl_unref(f->url);
+ f->url = NULL;
+ }
+
+ return 0;
+}
+
+
+/**
+ * Get the value of a dom node element's attribute.
+ *
+ * \param n dom element node
+ * \param attribute name of attribute
+ * \param context talloc context for result buffer
+ * \param value updated to value, if the attribute is present
+ * \return true on success, false if attribute present but memory exhausted
+ *
+ * \note returning true does not imply that the attribute was found. If the
+ * attribute was not found, *value will be unchanged.
+ */
+static bool
+box_get_attribute(dom_node *n,
+ const char *attribute,
+ void *context,
+ char **value)
+{
+ char *result;
+ dom_string *attr, *attr_name;
+ dom_exception err;
+
+ err = dom_string_create_interned((const uint8_t *) attribute,
+ strlen(attribute), &attr_name);
+ if (err != DOM_NO_ERR)
+ return false;
+
+ err = dom_element_get_attribute(n, attr_name, &attr);
+ if (err != DOM_NO_ERR) {
+ dom_string_unref(attr_name);
+ return false;
+ }
+
+ dom_string_unref(attr_name);
+
+ if (attr != NULL) {
+ result = talloc_strdup(context, dom_string_data(attr));
+
+ dom_string_unref(attr);
+
+ if (result == NULL)
+ return false;
+
+ *value = result;
+ }
+
+ return true;
+}
+
+
+/**
+ * Helper function for adding textarea widget to box.
+ *
+ * This is a load of hacks to ensure boxes replaced with textareas
+ * can be handled by the layout code.
+ */
+static bool
+box_input_text(html_content *html, struct box *box, struct dom_node *node)
+{
+ struct box *inline_container, *inline_box;
+
+ box->type = BOX_INLINE_BLOCK;
+
+ inline_container = box_create(NULL, 0, false, 0, 0, 0, 0, html->bctx);
+ if (!inline_container)
+ return false;
+ inline_container->type = BOX_INLINE_CONTAINER;
+ inline_box = box_create(NULL, box->style, false, 0, 0, box->title, 0,
+ html->bctx);
+ if (!inline_box)
+ return false;
+ inline_box->type = BOX_TEXT;
+ inline_box->text = talloc_strdup(html->bctx, "");
+
+ box_add_child(inline_container, inline_box);
+ box_add_child(box, inline_container);
+
+ return box_textarea_create_textarea(html, box, node);
+}
+
+
+/**
+ * Add an option to a form select control (helper function for box_select()).
+ *
+ * \param control select containing the &lt;option&gt;
+ * \param n xml element node for &lt;option&gt;
+ * \return true on success, false on memory exhaustion
+ */
+static bool box_select_add_option(struct form_control *control, dom_node *n)
+{
+ char *value = NULL;
+ char *text = NULL;
+ char *text_nowrap = NULL;
+ bool selected;
+ dom_string *content, *s;
+ dom_exception err;
+
+ err = dom_node_get_text_content(n, &content);
+ if (err != DOM_NO_ERR)
+ return false;
+
+ if (content != NULL) {
+ text = squash_whitespace(dom_string_data(content));
+ dom_string_unref(content);
+ } else {
+ text = strdup("");
+ }
+
+ if (text == NULL)
+ goto no_memory;
+
+ err = dom_element_get_attribute(n, corestring_dom_value, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ value = strdup(dom_string_data(s));
+ dom_string_unref(s);
+ } else {
+ value = strdup(text);
+ }
+
+ if (value == NULL)
+ goto no_memory;
+
+ if (dom_element_has_attribute(n, corestring_dom_selected, &selected) != DOM_NO_ERR) {
+ /* Assume not selected if we can't read the attribute presence */
+ selected = false;
+ }
+
+ /* replace spaces/TABs with hard spaces to prevent line wrapping */
+ text_nowrap = cnv_space2nbsp(text);
+ if (text_nowrap == NULL)
+ goto no_memory;
+
+ if (form_add_option(control, value, text_nowrap, selected, n) == false)
+ goto no_memory;
+
+ free(text);
+
+ return true;
+
+no_memory:
+ free(value);
+ free(text);
+ free(text_nowrap);
+ return false;
+}
+
+
+/**
+ * \name Special case element handlers
+ *
+ * These functions are called by box_construct_element() when an element is
+ * being converted, according to the entries in element_table.
+ *
+ * The parameters are the xmlNode, the content for the document, and a partly
+ * filled in box structure for the element.
+ *
+ * Return true on success, false on memory exhaustion. Set *convert_children
+ * to false if children of this element in the XML tree should be skipped (for
+ * example, if they have been processed in some special way already).
+ *
+ * Elements ordered as in the HTML 4.01 specification. Section numbers in
+ * brackets [] refer to the spec.
+ *
+ * \{
+ */
+
+/**
+ * special element handler for Anchor [12.2].
+ */
+static bool
+box_a(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ bool ok;
+ nsurl *url;
+ dom_string *s;
+ dom_exception err;
+
+ err = dom_element_get_attribute(n, corestring_dom_href, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ ok = box_extract_link(content, s, content->base_url, &url);
+ dom_string_unref(s);
+ if (!ok)
+ return false;
+ if (url) {
+ if (box->href != NULL)
+ nsurl_unref(box->href);
+ box->href = url;
+ }
+ }
+
+ /* name and id share the same namespace */
+ err = dom_element_get_attribute(n, corestring_dom_name, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ lwc_string *lwc_name;
+
+ err = dom_string_intern(s, &lwc_name);
+
+ dom_string_unref(s);
+
+ if (err == DOM_NO_ERR) {
+ /* name replaces existing id
+ * TODO: really? */
+ if (box->id != NULL)
+ lwc_string_unref(box->id);
+
+ box->id = lwc_name;
+ }
+ }
+
+ /* target frame [16.3] */
+ err = dom_element_get_attribute(n, corestring_dom_target, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc__blank))
+ box->target = TARGET_BLANK;
+ else if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc__top))
+ box->target = TARGET_TOP;
+ else if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc__parent))
+ box->target = TARGET_PARENT;
+ else if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc__self))
+ /* the default may have been overridden by a
+ * <base target=...>, so this is different to 0 */
+ box->target = TARGET_SELF;
+ else {
+ /* 6.16 says that frame names must begin with [a-zA-Z]
+ * This doesn't match reality, so just take anything */
+ box->target = talloc_strdup(content->bctx,
+ dom_string_data(s));
+ if (!box->target) {
+ dom_string_unref(s);
+ return false;
+ }
+ }
+ dom_string_unref(s);
+ }
+
+ return true;
+}
+
+
+/**
+ * Document body special element handler [7.5.1].
+ */
+static bool
+box_body(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ css_color color;
+
+ css_computed_background_color(box->style, &color);
+ if (nscss_color_is_transparent(color)) {
+ content->background_colour = NS_TRANSPARENT;
+ } else {
+ content->background_colour = nscss_color_to_ns(color);
+ }
+
+ return true;
+}
+
+
+/**
+ * special element handler for forced line break [9.3.2].
+ */
+static bool
+box_br(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ box->type = BOX_BR;
+ return true;
+}
+
+
+/**
+ * special element handler for Push button [17.5].
+ */
+static bool
+box_button(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ struct form_control *gadget;
+
+ gadget = html_forms_get_control_for_node(content->forms, n);
+ if (!gadget)
+ return false;
+
+ gadget->html = content;
+ box->gadget = gadget;
+ box->flags |= IS_REPLACED;
+ gadget->box = box;
+
+ box->type = BOX_INLINE_BLOCK;
+
+ /* Just render the contents */
+
+ return true;
+}
+
+
+/**
+ * Canvas element
+ */
+static bool
+box_canvas(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ /* If scripting is not enabled display the contents of canvas */
+ if (!content->enable_scripting) {
+ return true;
+ }
+ *convert_children = false;
+
+ return true;
+}
+
+
+/**
+ * Embedded object (not in any HTML specification:
+ * see http://wp.netscape.com/assist/net_sites/new_html3_prop.html )
+ */
+static bool
+box_embed(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ struct object_params *params;
+ struct object_param *param;
+ dom_namednodemap *attrs;
+ unsigned long idx;
+ uint32_t num_attrs;
+ dom_string *src;
+ dom_exception err;
+
+ if (box->style &&
+ ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
+ return true;
+
+ params = talloc(content->bctx, struct object_params);
+ if (params == NULL)
+ return false;
+
+ talloc_set_destructor(params, box_object_talloc_destructor);
+
+ params->data = NULL;
+ params->type = NULL;
+ params->codetype = NULL;
+ params->codebase = NULL;
+ params->classid = NULL;
+ params->params = NULL;
+
+ /* src is a URL */
+ err = dom_element_get_attribute(n, corestring_dom_src, &src);
+ if (err != DOM_NO_ERR || src == NULL)
+ return true;
+ if (box_extract_link(content, src, content->base_url,
+ &params->data) == false) {
+ dom_string_unref(src);
+ return false;
+ }
+
+ dom_string_unref(src);
+
+ if (params->data == NULL)
+ return true;
+
+ /* Don't include ourself */
+ if (nsurl_compare(content->base_url, params->data, NSURL_COMPLETE))
+ return true;
+
+ /* add attributes as parameters to linked list */
+ err = dom_node_get_attributes(n, &attrs);
+ if (err != DOM_NO_ERR)
+ return false;
+
+ err = dom_namednodemap_get_length(attrs, &num_attrs);
+ if (err != DOM_NO_ERR) {
+ dom_namednodemap_unref(attrs);
+ return false;
+ }
+
+ for (idx = 0; idx < num_attrs; idx++) {
+ dom_attr *attr;
+ dom_string *name, *value;
+
+ err = dom_namednodemap_item(attrs, idx, (void *) &attr);
+ if (err != DOM_NO_ERR) {
+ dom_namednodemap_unref(attrs);
+ return false;
+ }
+
+ err = dom_attr_get_name(attr, &name);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(attr);
+ dom_namednodemap_unref(attrs);
+ return false;
+ }
+
+ if (dom_string_caseless_lwc_isequal(name, corestring_lwc_src)) {
+ dom_node_unref(attr);
+ dom_string_unref(name);
+ continue;
+ }
+
+ err = dom_attr_get_value(attr, &value);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(attr);
+ dom_string_unref(name);
+ dom_namednodemap_unref(attrs);
+ return false;
+ }
+
+ param = talloc(content->bctx, struct object_param);
+ if (param == NULL) {
+ dom_node_unref(attr);
+ dom_string_unref(value);
+ dom_string_unref(name);
+ dom_namednodemap_unref(attrs);
+ return false;
+ }
+
+ param->name = talloc_strdup(content->bctx, dom_string_data(name));
+ param->value = talloc_strdup(content->bctx, dom_string_data(value));
+ param->type = NULL;
+ param->valuetype = talloc_strdup(content->bctx, "data");
+ param->next = NULL;
+
+ dom_string_unref(value);
+ dom_string_unref(name);
+ dom_node_unref(attr);
+
+ if (param->name == NULL || param->value == NULL ||
+ param->valuetype == NULL) {
+ dom_namednodemap_unref(attrs);
+ return false;
+ }
+
+ param->next = params->params;
+ params->params = param;
+ }
+
+ dom_namednodemap_unref(attrs);
+
+ box->object_params = params;
+
+ /* start fetch */
+ box->flags |= IS_REPLACED;
+ return html_fetch_object(content, params->data, box, CONTENT_ANY,
+ content->base.available_width, 1000, false);
+}
+
+
+/**
+ * Window subdivision [16.2.1].
+ */
+static bool
+box_frameset(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ bool ok;
+
+ if (content->frameset) {
+ NSLOG(netsurf, INFO, "Error: multiple framesets in document.");
+ /* Don't convert children */
+ if (convert_children)
+ *convert_children = false;
+ /* And ignore this spurious frameset */
+ box->type = BOX_NONE;
+ return true;
+ }
+
+ content->frameset = talloc_zero(content->bctx,
+ struct content_html_frames);
+ if (!content->frameset) {
+ return false;
+ }
+
+ ok = box_create_frameset(content->frameset, n, content);
+ if (ok) {
+ box->type = BOX_NONE;
+ }
+
+ if (convert_children) {
+ *convert_children = false;
+ }
+ return ok;
+}
+
+
+/**
+ * Inline subwindow [16.5].
+ */
+static bool
+box_iframe(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ nsurl *url;
+ dom_string *s;
+ dom_exception err;
+ struct content_html_iframe *iframe;
+ int i;
+
+ if (box->style &&
+ ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
+ return true;
+
+ if (box->style &&
+ css_computed_visibility(box->style) == CSS_VISIBILITY_HIDDEN) {
+ /* Don't create iframe discriptors for invisible iframes
+ * TODO: handle hidden iframes at browser_window generation
+ * time instead? */
+ return true;
+ }
+
+ /* get frame URL */
+ err = dom_element_get_attribute(n, corestring_dom_src, &s);
+ if (err != DOM_NO_ERR || s == NULL)
+ return true;
+ if (box_extract_link(content, s, content->base_url, &url) == false) {
+ dom_string_unref(s);
+ return false;
+ }
+ dom_string_unref(s);
+ if (url == NULL)
+ return true;
+
+ /* don't include ourself */
+ if (nsurl_compare(content->base_url, url, NSURL_COMPLETE)) {
+ nsurl_unref(url);
+ return true;
+ }
+
+ /* create a new iframe */
+ iframe = talloc(content->bctx, struct content_html_iframe);
+ if (iframe == NULL) {
+ nsurl_unref(url);
+ return false;
+ }
+
+ talloc_set_destructor(iframe, box_iframes_talloc_destructor);
+
+ iframe->box = box;
+ iframe->margin_width = 0;
+ iframe->margin_height = 0;
+ iframe->name = NULL;
+ iframe->url = url;
+ iframe->scrolling = BW_SCROLLING_AUTO;
+ iframe->border = true;
+
+ /* Add this iframe to the linked list of iframes */
+ iframe->next = content->iframe;
+ content->iframe = iframe;
+
+ /* fill in specified values */
+ err = dom_element_get_attribute(n, corestring_dom_name, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ iframe->name = talloc_strdup(content->bctx, dom_string_data(s));
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_frameborder, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ i = atoi(dom_string_data(s));
+ iframe->border = (i != 0);
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_bordercolor, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ css_color color;
+
+ if (nscss_parse_colour(dom_string_data(s), &color))
+ iframe->border_colour = nscss_color_to_ns(color);
+
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_scrolling, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc_yes))
+ iframe->scrolling = BW_SCROLLING_YES;
+ else if (dom_string_caseless_lwc_isequal(s,
+ corestring_lwc_no))
+ iframe->scrolling = BW_SCROLLING_NO;
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_marginwidth, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ iframe->margin_width = atoi(dom_string_data(s));
+ dom_string_unref(s);
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_marginheight, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ iframe->margin_height = atoi(dom_string_data(s));
+ dom_string_unref(s);
+ }
+
+ /* box */
+ assert(box->style);
+ box->flags |= IFRAME;
+ box->flags |= IS_REPLACED;
+
+ /* Showing iframe, so don't show alternate content */
+ if (convert_children)
+ *convert_children = false;
+ return true;
+}
+
+
+/**
+ * Embedded image [13.2].
+ */
+static bool
+box_image(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ bool ok;
+ dom_string *s;
+ dom_exception err;
+ nsurl *url;
+ enum css_width_e wtype;
+ enum css_height_e htype;
+ css_fixed value = 0;
+ css_unit wunit = CSS_UNIT_PX;
+ css_unit hunit = CSS_UNIT_PX;
+
+ if (box->style &&
+ ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
+ return true;
+
+ /* handle alt text */
+ err = dom_element_get_attribute(n, corestring_dom_alt, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ char *alt = squash_whitespace(dom_string_data(s));
+ dom_string_unref(s);
+ if (alt == NULL)
+ return false;
+ box->text = talloc_strdup(content->bctx, alt);
+ free(alt);
+ if (box->text == NULL)
+ return false;
+ box->length = strlen(box->text);
+ }
+
+ if (nsoption_bool(foreground_images) == false) {
+ return true;
+ }
+
+ /* imagemap associated with this image */
+ if (!box_get_attribute(n, "usemap", content->bctx, &box->usemap))
+ return false;
+ if (box->usemap && box->usemap[0] == '#')
+ box->usemap++;
+
+ /* get image URL */
+ err = dom_element_get_attribute(n, corestring_dom_src, &s);
+ if (err != DOM_NO_ERR || s == NULL)
+ return true;
+
+ if (box_extract_link(content, s, content->base_url, &url) == false) {
+ dom_string_unref(s);
+ return false;
+ }
+
+ dom_string_unref(s);
+
+ if (url == NULL)
+ return true;
+
+ /* start fetch */
+ box->flags |= IS_REPLACED;
+ ok = html_fetch_object(content, url, box, image_types,
+ content->base.available_width, 1000, false);
+ nsurl_unref(url);
+
+ wtype = css_computed_width(box->style, &value, &wunit);
+ htype = css_computed_height(box->style, &value, &hunit);
+
+ if (wtype == CSS_WIDTH_SET &&
+ wunit != CSS_UNIT_PCT &&
+ htype == CSS_HEIGHT_SET &&
+ hunit != CSS_UNIT_PCT) {
+ /* We know the dimensions the image will be shown at
+ * before it's fetched. */
+ box->flags |= REPLACE_DIM;
+ }
+
+ return ok;
+}
+
+
+/**
+ * Form control [17.4].
+ */
+static bool
+box_input(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ struct form_control *gadget;
+ dom_string *type = NULL;
+ dom_exception err;
+ nsurl *url;
+ nserror error;
+
+ gadget = html_forms_get_control_for_node(content->forms, n);
+ if (gadget == NULL) {
+ return false;
+ }
+
+ box->gadget = gadget;
+ box->flags |= IS_REPLACED;
+ gadget->box = box;
+ gadget->html = content;
+
+ /* get entry type */
+ err = dom_element_get_attribute(n, corestring_dom_type, &type);
+ if ((err != DOM_NO_ERR) || (type == NULL)) {
+ /* no type so "text" is assumed */
+ if (box_input_text(content, box, n) == false) {
+ return false;
+ }
+ *convert_children = false;
+ return true;
+ }
+
+ if (dom_string_caseless_lwc_isequal(type, corestring_lwc_password)) {
+ if (box_input_text(content, box, n) == false)
+ goto no_memory;
+
+ } else if (dom_string_caseless_lwc_isequal(type, corestring_lwc_file)) {
+ box->type = BOX_INLINE_BLOCK;
+
+ } else if (dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_hidden)) {
+ /* no box for hidden inputs */
+ box->type = BOX_NONE;
+
+ } else if ((dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_checkbox) ||
+ dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_radio))) {
+
+ } else if (dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_submit) ||
+ dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_reset) ||
+ dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_button)) {
+ struct box *inline_container, *inline_box;
+
+ if (box_button(n, content, box, 0) == false)
+ goto no_memory;
+
+ inline_container = box_create(NULL, 0, false, 0, 0, 0, 0,
+ content->bctx);
+ if (inline_container == NULL)
+ goto no_memory;
+
+ inline_container->type = BOX_INLINE_CONTAINER;
+
+ inline_box = box_create(NULL, box->style, false, 0, 0,
+ box->title, 0, content->bctx);
+ if (inline_box == NULL)
+ goto no_memory;
+
+ inline_box->type = BOX_TEXT;
+
+ if (box->gadget->value != NULL)
+ inline_box->text = talloc_strdup(content->bctx,
+ box->gadget->value);
+ else if (box->gadget->type == GADGET_SUBMIT)
+ inline_box->text = talloc_strdup(content->bctx,
+ messages_get("Form_Submit"));
+ else if (box->gadget->type == GADGET_RESET)
+ inline_box->text = talloc_strdup(content->bctx,
+ messages_get("Form_Reset"));
+ else
+ inline_box->text = talloc_strdup(content->bctx,
+ "Button");
+
+ if (inline_box->text == NULL)
+ goto no_memory;
+
+ inline_box->length = strlen(inline_box->text);
+
+ box_add_child(inline_container, inline_box);
+
+ box_add_child(box, inline_container);
+
+ } else if (dom_string_caseless_lwc_isequal(type,
+ corestring_lwc_image)) {
+ gadget->type = GADGET_IMAGE;
+
+ if (box->style &&
+ ns_computed_display(box->style,
+ box_is_root(n)) != CSS_DISPLAY_NONE &&
+ nsoption_bool(foreground_images) == true) {
+ dom_string *s;
+
+ err = dom_element_get_attribute(n, corestring_dom_src, &s);
+ if (err == DOM_NO_ERR && s != NULL) {
+ error = nsurl_join(content->base_url,
+ dom_string_data(s), &url);
+ dom_string_unref(s);
+ if (error != NSERROR_OK)
+ goto no_memory;
+
+ /* if url is equivalent to the parent's url,
+ * we've got infinite inclusion. stop it here
+ */
+ if (nsurl_compare(url, content->base_url,
+ NSURL_COMPLETE) == false) {
+ if (!html_fetch_object(content, url,
+ box, image_types,
+ content->base.
+ available_width,
+ 1000, false)) {
+ nsurl_unref(url);
+ goto no_memory;
+ }
+ }
+ nsurl_unref(url);
+ }
+ }
+ } else {
+ /* unhandled type the default is "text" */
+ if (box_input_text(content, box, n) == false)
+ goto no_memory;
+ }
+
+ dom_string_unref(type);
+
+ *convert_children = false;
+
+ return true;
+
+no_memory:
+ dom_string_unref(type);
+
+ return false;
+}
+
+
+/**
+ * Noscript element
+ */
+static bool
+box_noscript(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ /* If scripting is enabled, do not display the contents of noscript */
+ if (content->enable_scripting) {
+ *convert_children = false;
+ }
+
+ return true;
+}
+
+
+/**
+ * Generic embedded object [13.3].
+ */
+static bool
+box_object(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ struct object_params *params;
+ struct object_param *param;
+ dom_string *codebase, *classid, *data;
+ dom_node *c;
+ dom_exception err;
+
+ if (box->style &&
+ ns_computed_display(box->style, box_is_root(n)) == CSS_DISPLAY_NONE)
+ return true;
+
+ if (box_get_attribute(n, "usemap", content->bctx, &box->usemap) ==
+ false)
+ return false;
+ if (box->usemap && box->usemap[0] == '#')
+ box->usemap++;
+
+ params = talloc(content->bctx, struct object_params);
+ if (params == NULL)
+ return false;
+
+ talloc_set_destructor(params, box_object_talloc_destructor);
+
+ params->data = NULL;
+ params->type = NULL;
+ params->codetype = NULL;
+ params->codebase = NULL;
+ params->classid = NULL;
+ params->params = NULL;
+
+ /* codebase, classid, and data are URLs
+ * (codebase is the base for the other two) */
+ err = dom_element_get_attribute(n, corestring_dom_codebase, &codebase);
+ if (err == DOM_NO_ERR && codebase != NULL) {
+ if (box_extract_link(content, codebase, content->base_url,
+ &params->codebase) == false) {
+ dom_string_unref(codebase);
+ return false;
+ }
+ dom_string_unref(codebase);
+ }
+ if (params->codebase == NULL)
+ params->codebase = nsurl_ref(content->base_url);
+
+ err = dom_element_get_attribute(n, corestring_dom_classid, &classid);
+ if (err == DOM_NO_ERR && classid != NULL) {
+ if (box_extract_link(content, classid,
+ params->codebase, &params->classid) == false) {
+ dom_string_unref(classid);
+ return false;
+ }
+ dom_string_unref(classid);
+ }
+
+ err = dom_element_get_attribute(n, corestring_dom_data, &data);
+ if (err == DOM_NO_ERR && data != NULL) {
+ if (box_extract_link(content, data,
+ params->codebase, &params->data) == false) {
+ dom_string_unref(data);
+ return false;
+ }
+ dom_string_unref(data);
+ }
+
+ if (params->classid == NULL && params->data == NULL)
+ /* nothing to embed; ignore */
+ return true;
+
+ /* Don't include ourself */
+ if (params->classid != NULL && nsurl_compare(content->base_url,
+ params->classid, NSURL_COMPLETE))
+ return true;
+
+ if (params->data != NULL && nsurl_compare(content->base_url,
+ params->data, NSURL_COMPLETE))
+ return true;
+
+ /* codetype and type are MIME types */
+ if (box_get_attribute(n, "codetype", params,
+ &params->codetype) == false)
+ return false;
+ if (box_get_attribute(n, "type", params, &params->type) == false)
+ return false;
+
+ /* classid && !data => classid is used (consult codetype)
+ * (classid || !classid) && data => data is used (consult type)
+ * !classid && !data => invalid; ignored */
+
+ if (params->classid != NULL && params->data == NULL &&
+ params->codetype != NULL) {
+ lwc_string *icodetype;
+ lwc_error lerror;
+
+ lerror = lwc_intern_string(params->codetype,
+ strlen(params->codetype), &icodetype);
+ if (lerror != lwc_error_ok)
+ return false;
+
+ if (content_factory_type_from_mime_type(icodetype) ==
+ CONTENT_NONE) {
+ /* can't handle this MIME type */
+ lwc_string_unref(icodetype);
+ return true;
+ }
+
+ lwc_string_unref(icodetype);
+ }
+
+ if (params->data != NULL && params->type != NULL) {
+ lwc_string *itype;
+ lwc_error lerror;
+
+ lerror = lwc_intern_string(params->type, strlen(params->type),
+ &itype);
+ if (lerror != lwc_error_ok)
+ return false;
+
+ if (content_factory_type_from_mime_type(itype) ==
+ CONTENT_NONE) {
+ /* can't handle this MIME type */
+ lwc_string_unref(itype);
+ return true;
+ }
+
+ lwc_string_unref(itype);
+ }
+
+ /* add parameters to linked list */
+ err = dom_node_get_first_child(n, &c);
+ if (err != DOM_NO_ERR)
+ return false;
+
+ while (c != NULL) {
+ dom_node *next;
+ dom_node_type type;
+
+ err = dom_node_get_node_type(c, &type);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (type == DOM_ELEMENT_NODE) {
+ dom_string *name;
+
+ err = dom_node_get_node_name(c, &name);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (!dom_string_caseless_lwc_isequal(name,
+ corestring_lwc_param)) {
+ /* The first non-param child is the start of
+ * the alt html. Therefore, we should break
+ * out of this loop. */
+ dom_string_unref(name);
+ dom_node_unref(c);
+ break;
+ }
+ dom_string_unref(name);
+
+ param = talloc(params, struct object_param);
+ if (param == NULL) {
+ dom_node_unref(c);
+ return false;
+ }
+ param->name = NULL;
+ param->value = NULL;
+ param->type = NULL;
+ param->valuetype = NULL;
+ param->next = NULL;
+
+ if (box_get_attribute(c, "name", param,
+ &param->name) == false) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (box_get_attribute(c, "value", param,
+ &param->value) == false) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (box_get_attribute(c, "type", param,
+ &param->type) == false) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (box_get_attribute(c, "valuetype", param,
+ &param->valuetype) == false) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ if (param->valuetype == NULL) {
+ param->valuetype = talloc_strdup(param, "data");
+ if (param->valuetype == NULL) {
+ dom_node_unref(c);
+ return false;
+ }
+ }
+
+ param->next = params->params;
+ params->params = param;
+ }
+
+ err = dom_node_get_next_sibling(c, &next);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ return false;
+ }
+
+ dom_node_unref(c);
+ c = next;
+ }
+
+ box->object_params = params;
+
+ /* start fetch (MIME type is ok or not specified) */
+ box->flags |= IS_REPLACED;
+ if (!html_fetch_object(content,
+ params->data ? params->data : params->classid,
+ box, CONTENT_ANY, content->base.available_width, 1000,
+ false))
+ return false;
+
+ *convert_children = false;
+ return true;
+}
+
+
+/**
+ * Preformatted text [9.3.4].
+ */
+static bool
+box_pre(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ box->flags |= PRE_STRIP;
+ return true;
+}
+
+
+/**
+ * Option selector [17.6].
+ */
+static bool
+box_select(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ struct box *inline_container;
+ struct box *inline_box;
+ struct form_control *gadget;
+ dom_node *c, *c2;
+ dom_node *next, *next2;
+ dom_exception err;
+
+ gadget = html_forms_get_control_for_node(content->forms, n);
+ if (gadget == NULL)
+ return false;
+
+ gadget->html = content;
+ err = dom_node_get_first_child(n, &c);
+ if (err != DOM_NO_ERR) {
+ form_free_control(gadget);
+ return false;
+ }
+
+ while (c != NULL) {
+ dom_string *name;
+
+ err = dom_node_get_node_name(c, &name);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+
+ if (dom_string_caseless_lwc_isequal(name,
+ corestring_lwc_option)) {
+ dom_string_unref(name);
+
+ if (box_select_add_option(gadget, c) == false) {
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+ } else if (dom_string_caseless_lwc_isequal(name,
+ corestring_lwc_optgroup)) {
+ dom_string_unref(name);
+
+ err = dom_node_get_first_child(c, &c2);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+
+ while (c2 != NULL) {
+ dom_string *c2_name;
+
+ err = dom_node_get_node_name(c2, &c2_name);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c2);
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+
+ if (dom_string_caseless_lwc_isequal(c2_name,
+ corestring_lwc_option)) {
+ dom_string_unref(c2_name);
+
+ if (box_select_add_option(gadget,
+ c2) == false) {
+ dom_node_unref(c2);
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+ } else {
+ dom_string_unref(c2_name);
+ }
+
+ err = dom_node_get_next_sibling(c2, &next2);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c2);
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+
+ dom_node_unref(c2);
+ c2 = next2;
+ }
+ } else {
+ dom_string_unref(name);
+ }
+
+ err = dom_node_get_next_sibling(c, &next);
+ if (err != DOM_NO_ERR) {
+ dom_node_unref(c);
+ form_free_control(gadget);
+ return false;
+ }
+
+ dom_node_unref(c);
+ c = next;
+ }
+
+ if (gadget->data.select.num_items == 0) {
+ /* no options: ignore entire select */
+ form_free_control(gadget);
+ return true;
+ }
+
+ box->type = BOX_INLINE_BLOCK;
+ box->gadget = gadget;
+ box->flags |= IS_REPLACED;
+ gadget->box = box;
+
+ inline_container = box_create(NULL, 0, false, 0, 0, 0, 0, content->bctx);
+ if (inline_container == NULL)
+ goto no_memory;
+ inline_container->type = BOX_INLINE_CONTAINER;
+ inline_box = box_create(NULL, box->style, false, 0, 0, box->title, 0,
+ content->bctx);
+ if (inline_box == NULL)
+ goto no_memory;
+ inline_box->type = BOX_TEXT;
+ box_add_child(inline_container, inline_box);
+ box_add_child(box, inline_container);
+
+ if (gadget->data.select.multiple == false &&
+ gadget->data.select.num_selected == 0) {
+ gadget->data.select.current = gadget->data.select.items;
+ gadget->data.select.current->initial_selected =
+ gadget->data.select.current->selected = true;
+ gadget->data.select.num_selected = 1;
+ dom_html_option_element_set_selected(
+ gadget->data.select.current->node, true);
+ }
+
+ if (gadget->data.select.num_selected == 0)
+ inline_box->text = talloc_strdup(content->bctx,
+ messages_get("Form_None"));
+ else if (gadget->data.select.num_selected == 1)
+ inline_box->text = talloc_strdup(content->bctx,
+ gadget->data.select.current->text);
+ else
+ inline_box->text = talloc_strdup(content->bctx,
+ messages_get("Form_Many"));
+ if (inline_box->text == NULL)
+ goto no_memory;
+
+ inline_box->length = strlen(inline_box->text);
+
+ *convert_children = false;
+ return true;
+
+no_memory:
+ return false;
+}
+
+
+/**
+ * Multi-line text field [17.7].
+ */
+static bool box_textarea(dom_node *n,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ /* Get the form_control for the DOM node */
+ box->gadget = html_forms_get_control_for_node(content->forms, n);
+ if (box->gadget == NULL)
+ return false;
+
+ box->flags |= IS_REPLACED;
+ box->gadget->html = content;
+ box->gadget->box = box;
+
+ if (!box_input_text(content, box, n))
+ return false;
+
+ *convert_children = false;
+ return true;
+}
+
+
+/**
+ * \}
+ */
+
+
+/* exported interface documented in html/box_special.h */
+bool
+convert_special_elements(dom_node *node,
+ html_content *content,
+ struct box *box,
+ bool *convert_children)
+{
+ dom_exception exc;
+ dom_html_element_type tag_type;
+ bool res;
+
+ exc = dom_html_element_get_tag_type(node, &tag_type);
+ if (exc != DOM_NO_ERR) {
+ tag_type = DOM_HTML_ELEMENT_TYPE__UNKNOWN;
+ }
+
+ switch (tag_type) {
+ case DOM_HTML_ELEMENT_TYPE_A:
+ res = box_a(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_BODY:
+ res = box_body(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_BR:
+ res = box_br(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_BUTTON:
+ res = box_button(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_CANVAS:
+ res = box_canvas(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_EMBED:
+ res = box_embed(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_FRAMESET:
+ res = box_frameset(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_IFRAME:
+ res = box_iframe(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_IMG:
+ res = box_image(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_INPUT:
+ res = box_input(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_NOSCRIPT:
+ res = box_noscript(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_OBJECT:
+ res = box_object(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_PRE:
+ res = box_pre(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_SELECT:
+ res = box_select(node, content, box, convert_children);
+ break;
+
+ case DOM_HTML_ELEMENT_TYPE_TEXTAREA:
+ res = box_textarea(node, content, box, convert_children);
+ break;
+
+ default:
+ res = true;
+ }
+
+ return res;
+}
diff --git a/content/handlers/html/box_special.h b/content/handlers/html/box_special.h
new file mode 100644
index 000000000..973ab976a
--- /dev/null
+++ b/content/handlers/html/box_special.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * HTML Box tree construction special element conversion interface.
+ */
+
+#ifndef NETSURF_HTML_BOX_SPECIAL_H
+#define NETSURF_HTML_BOX_SPECIAL_H
+
+
+/**
+ * call an elements special conversion handler
+ *
+ * \return true if box construction should continue else false on error.
+ */
+bool convert_special_elements(dom_node *node, html_content *content, struct box *box, bool *convert_children);
+
+#endif
diff --git a/content/handlers/html/box_textarea.c b/content/handlers/html/box_textarea.c
index e253e168d..476773f29 100644
--- a/content/handlers/html/box_textarea.c
+++ b/content/handlers/html/box_textarea.c
@@ -33,6 +33,7 @@
#include "html/html_internal.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "html/box_textarea.h"
#include "html/font.h"
#include "html/form_internal.h"
diff --git a/content/handlers/html/form.c b/content/handlers/html/form.c
index fd0f2fa3e..86c4196ed 100644
--- a/content/handlers/html/form.c
+++ b/content/handlers/html/form.c
@@ -53,6 +53,7 @@
#include "desktop/gui_internal.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "html/font.h"
#include "html/form_internal.h"
#include "html/html.h"
diff --git a/content/handlers/html/html.c b/content/handlers/html/html.c
index 9b4785839..01244cc35 100644
--- a/content/handlers/html/html.c
+++ b/content/handlers/html/html.c
@@ -61,6 +61,7 @@
#include "html/interaction.h"
#include "html/box.h"
#include "html/box_construct.h"
+#include "html/box_inspect.h"
#include "html/form_internal.h"
#include "html/imagemap.h"
#include "html/layout.h"
diff --git a/content/handlers/html/html_object.c b/content/handlers/html/html_object.c
index 3a60c47f1..587c48756 100644
--- a/content/handlers/html/html_object.c
+++ b/content/handlers/html/html_object.c
@@ -42,6 +42,7 @@
#include "html/html.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "html/html_internal.h"
/* break reference loop */
diff --git a/content/handlers/html/html_redraw.c b/content/handlers/html/html_redraw.c
index a60f44e28..ee6fab275 100644
--- a/content/handlers/html/html_redraw.c
+++ b/content/handlers/html/html_redraw.c
@@ -54,6 +54,8 @@
#include "desktop/gui_internal.h"
#include "html/box.h"
+#include "html/box_inspect.h"
+#include "html/box_manipulate.h"
#include "html/font.h"
#include "html/form_internal.h"
#include "html/html_internal.h"
diff --git a/content/handlers/html/interaction.c b/content/handlers/html/interaction.c
index 7c4d54f2c..e4ef2f123 100644
--- a/content/handlers/html/interaction.c
+++ b/content/handlers/html/interaction.c
@@ -50,6 +50,7 @@
#include "html/box.h"
#include "html/box_textarea.h"
+#include "html/box_inspect.h"
#include "html/font.h"
#include "html/form_internal.h"
#include "html/html_internal.h"
diff --git a/content/handlers/html/layout.c b/content/handlers/html/layout.c
index 611c77819..128b12c0b 100644
--- a/content/handlers/html/layout.c
+++ b/content/handlers/html/layout.c
@@ -60,6 +60,7 @@
#include "html/html_save.h"
#include "html/html_internal.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "html/font.h"
#include "html/form_internal.h"
#include "html/layout.h"
diff --git a/content/handlers/html/search.c b/content/handlers/html/search.c
index 981c80b11..864fac6dd 100644
--- a/content/handlers/html/search.c
+++ b/content/handlers/html/search.c
@@ -40,6 +40,7 @@
#include "text/textplain.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "html/html.h"
#include "html/html_internal.h"
#include "html/search.h"
diff --git a/desktop/frames.c b/desktop/frames.c
index 1ed114540..a03f86c8f 100644
--- a/desktop/frames.c
+++ b/desktop/frames.c
@@ -35,6 +35,7 @@
#include "content/hlcache.h"
#include "html/html.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "desktop/browser_private.h"
#include "desktop/frames.h"
diff --git a/desktop/scrollbar.h b/desktop/scrollbar.h
index fa5e167f2..796520724 100644
--- a/desktop/scrollbar.h
+++ b/desktop/scrollbar.h
@@ -38,6 +38,7 @@
#define SCROLL_BOTTOM INT_MAX
struct scrollbar;
+struct redraw_context;
/**
* scrollbar message types
diff --git a/desktop/selection.c b/desktop/selection.c
index c8edda7b1..6c8f5d798 100644
--- a/desktop/selection.c
+++ b/desktop/selection.c
@@ -33,6 +33,7 @@
#include "utils/utils.h"
#include "netsurf/form.h"
#include "html/box.h"
+#include "html/box_inspect.h"
#include "html/html_internal.h"
#include "html/font.h"
#include "text/textplain.h"