diff options
Diffstat (limited to 'content/handlers/html/box_construct.c')
| -rw-r--r-- | content/handlers/html/box_construct.c | 2783 |
1 files changed, 531 insertions, 2252 deletions
diff --git a/content/handlers/html/box_construct.c b/content/handlers/html/box_construct.c index f0d68ac2e..559d207cd 100644 --- a/content/handlers/html/box_construct.c +++ b/content/handlers/html/box_construct.c @@ -25,35 +25,29 @@ * 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 <dom/dom.h> -#include "utils/config.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 "utils/nsurl.h" +#include "utils/utils.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/private.h" +#include "html/object.h" #include "html/box.h" -#include "html/box_textarea.h" +#include "html/box_manipulate.h" +#include "html/box_construct.h" +#include "html/box_special.h" +#include "html/box_normalise.h" #include "html/form_internal.h" -#include "html/html_internal.h" /** * Context for box tree construction @@ -77,7 +71,7 @@ struct box_construct_props { /** Style from which to inherit, or NULL if none */ const css_computed_style *parent_style; /** Current link target, or NULL if none */ - nsurl *href; + struct nsurl *href; /** Current frame target, or NULL if none */ const char *target; /** Current title attribute, or NULL if none */ @@ -93,159 +87,39 @@ struct box_construct_props { static const content_type image_types = CONTENT_IMAGE; -/* the strings are not important, since we just compare the pointers */ -const char *TARGET_SELF = "_self"; -const char *TARGET_PARENT = "_parent"; -const char *TARGET_TOP = "_top"; -const char *TARGET_BLANK = "_blank"; - -static void convert_xml_to_box(struct box_construct_ctx *ctx); -static bool box_construct_element(struct box_construct_ctx *ctx, - bool *convert_children); -static void box_construct_element_after(dom_node *n, html_content *content); -static bool box_construct_text(struct box_construct_ctx *ctx); -static css_select_results * box_get_style(html_content *c, - const css_computed_style *parent_style, - const css_computed_style *root_style, dom_node *n); -static void box_text_transform(char *s, unsigned int len, - enum css_text_transform_e tt); -#define BOX_SPECIAL_PARAMS dom_node *n, html_content *content, \ - struct box *box, bool *convert_children -static bool box_a(BOX_SPECIAL_PARAMS); -static bool box_body(BOX_SPECIAL_PARAMS); -static bool box_br(BOX_SPECIAL_PARAMS); -static bool box_image(BOX_SPECIAL_PARAMS); -static bool box_textarea(BOX_SPECIAL_PARAMS); -static bool box_select(BOX_SPECIAL_PARAMS); -static bool box_input(BOX_SPECIAL_PARAMS); -static bool box_button(BOX_SPECIAL_PARAMS); -static bool box_frameset(BOX_SPECIAL_PARAMS); -static bool box_create_frameset(struct content_html_frames *f, dom_node *n, - html_content *content); -static bool box_select_add_option(struct form_control *control, dom_node *n); -static bool box_noscript(BOX_SPECIAL_PARAMS); -static bool box_object(BOX_SPECIAL_PARAMS); -static bool box_embed(BOX_SPECIAL_PARAMS); -static bool box_pre(BOX_SPECIAL_PARAMS); -static bool box_iframe(BOX_SPECIAL_PARAMS); -static bool box_get_attribute(dom_node *n, const char *attribute, - void *context, char **value); - -/* element_table must be sorted by name */ -struct element_entry { - char name[10]; /* element type */ - bool (*convert)(BOX_SPECIAL_PARAMS); -}; -static const struct element_entry element_table[] = { - {"a", box_a}, - {"body", box_body}, - {"br", box_br}, - {"button", box_button}, - {"embed", box_embed}, - {"frameset", box_frameset}, - {"iframe", box_iframe}, - {"img", box_image}, - {"input", box_input}, - {"noscript", box_noscript}, - {"object", box_object}, - {"pre", box_pre}, - {"select", box_select}, - {"textarea", box_textarea} -}; -#define ELEMENT_TABLE_COUNT (sizeof(element_table) / sizeof(element_table[0])) - -/** - * Construct a box tree from an xml tree and stylesheets. - * - * \param n xml tree - * \param c content of type CONTENT_HTML to construct box tree in - * \param cb callback to report conversion completion - * \return netsurf error code indicating status of call - */ - -nserror dom_to_box(dom_node *n, html_content *c, box_construct_complete_cb cb, void **box_conversion_context) -{ - struct box_construct_ctx *ctx; - - assert(box_conversion_context != NULL); - - if (c->bctx == NULL) { - /* create a context allocation for this box tree */ - c->bctx = talloc_zero(0, int); - if (c->bctx == NULL) { - return NSERROR_NOMEM; - } - } - - ctx = malloc(sizeof(*ctx)); - if (ctx == NULL) { - return NSERROR_NOMEM; - } - - ctx->content = c; - ctx->n = dom_node_ref(n); - ctx->root_box = NULL; - ctx->cb = cb; - ctx->bctx = c->bctx; - - *box_conversion_context = ctx; - - return guit->misc->schedule(0, (void *)convert_xml_to_box, ctx); -} - -nserror cancel_dom_to_box(void *box_conversion_context) -{ - struct box_construct_ctx *ctx = box_conversion_context; - nserror err; - - err = guit->misc->schedule(-1, (void *)convert_xml_to_box, ctx); - if (err != NSERROR_OK) { - return err; - } - - dom_node_unref(ctx->n); - free(ctx); - - return NSERROR_OK; -} - - /* mapping from CSS display to box type * this table must be in sync with libcss' css_display enum */ static const box_type box_map[] = { - 0, /*CSS_DISPLAY_INHERIT,*/ - BOX_INLINE, /*CSS_DISPLAY_INLINE,*/ - BOX_BLOCK, /*CSS_DISPLAY_BLOCK,*/ - BOX_BLOCK, /*CSS_DISPLAY_LIST_ITEM,*/ - BOX_INLINE, /*CSS_DISPLAY_RUN_IN,*/ - BOX_INLINE_BLOCK, /*CSS_DISPLAY_INLINE_BLOCK,*/ - BOX_TABLE, /*CSS_DISPLAY_TABLE,*/ - BOX_TABLE, /*CSS_DISPLAY_INLINE_TABLE,*/ - BOX_TABLE_ROW_GROUP, /*CSS_DISPLAY_TABLE_ROW_GROUP,*/ - BOX_TABLE_ROW_GROUP, /*CSS_DISPLAY_TABLE_HEADER_GROUP,*/ - BOX_TABLE_ROW_GROUP, /*CSS_DISPLAY_TABLE_FOOTER_GROUP,*/ - BOX_TABLE_ROW, /*CSS_DISPLAY_TABLE_ROW,*/ - BOX_NONE, /*CSS_DISPLAY_TABLE_COLUMN_GROUP,*/ - BOX_NONE, /*CSS_DISPLAY_TABLE_COLUMN,*/ - BOX_TABLE_CELL, /*CSS_DISPLAY_TABLE_CELL,*/ - BOX_INLINE, /*CSS_DISPLAY_TABLE_CAPTION,*/ - BOX_NONE /*CSS_DISPLAY_NONE*/ + BOX_BLOCK, /* CSS_DISPLAY_INHERIT */ + BOX_INLINE, /* CSS_DISPLAY_INLINE */ + BOX_BLOCK, /* CSS_DISPLAY_BLOCK */ + BOX_BLOCK, /* CSS_DISPLAY_LIST_ITEM */ + BOX_INLINE, /* CSS_DISPLAY_RUN_IN */ + BOX_INLINE_BLOCK, /* CSS_DISPLAY_INLINE_BLOCK */ + BOX_TABLE, /* CSS_DISPLAY_TABLE */ + BOX_TABLE, /* CSS_DISPLAY_INLINE_TABLE */ + BOX_TABLE_ROW_GROUP, /* CSS_DISPLAY_TABLE_ROW_GROUP */ + BOX_TABLE_ROW_GROUP, /* CSS_DISPLAY_TABLE_HEADER_GROUP */ + BOX_TABLE_ROW_GROUP, /* CSS_DISPLAY_TABLE_FOOTER_GROUP */ + BOX_TABLE_ROW, /* CSS_DISPLAY_TABLE_ROW */ + BOX_NONE, /* CSS_DISPLAY_TABLE_COLUMN_GROUP */ + BOX_NONE, /* CSS_DISPLAY_TABLE_COLUMN */ + BOX_TABLE_CELL, /* CSS_DISPLAY_TABLE_CELL */ + BOX_INLINE, /* CSS_DISPLAY_TABLE_CAPTION */ + BOX_NONE, /* CSS_DISPLAY_NONE */ + BOX_FLEX, /* CSS_DISPLAY_FLEX */ + BOX_INLINE_FLEX, /* CSS_DISPLAY_INLINE_FLEX */ + BOX_BLOCK, /* CSS_DISPLAY_GRID */ + BOX_INLINE_BLOCK, /* CSS_DISPLAY_INLINE_GRID */ }; -/* Exported function, see box.h */ -struct box *box_for_node(dom_node *n) -{ - struct box *box = NULL; - dom_exception err; - - err = dom_node_get_user_data(n, corestring_dom___ns_key_box_node_data, - (void *) &box); - if (err != DOM_NO_ERR) - return NULL; - - return box; -} +/** + * 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; @@ -272,207 +146,215 @@ static inline bool box_is_root(dom_node *n) } /** - * Find the next node in the DOM tree, completing - * element construction where appropriate. - * - * \param n Current node - * \param content Containing content - * \param convert_children Whether to consider children of \a n - * \return Next node to process, or NULL if complete + * Extract transient construction properties * - * \note \a n will be unreferenced + * \param n Current DOM node to convert + * \param props Property object to populate */ -static dom_node *next_node(dom_node *n, html_content *content, - bool convert_children) +static void +box_extract_properties(dom_node *n, struct box_construct_props *props) { - dom_node *next = NULL; - bool has_children; - dom_exception err; - - err = dom_node_has_child_nodes(n, &has_children); - if (err != DOM_NO_ERR) { - dom_node_unref(n); - return NULL; - } - - if (convert_children && has_children) { - err = dom_node_get_first_child(n, &next); - if (err != DOM_NO_ERR) { - dom_node_unref(n); - return NULL; - } - dom_node_unref(n); - } else { - err = dom_node_get_next_sibling(n, &next); - if (err != DOM_NO_ERR) { - dom_node_unref(n); - return NULL; - } - - if (next != NULL) { - if (box_for_node(n) != NULL) - box_construct_element_after(n, content); - dom_node_unref(n); - } else { - if (box_for_node(n) != NULL) - box_construct_element_after(n, content); - - while (box_is_root(n) == false) { - dom_node *parent = NULL; - dom_node *parent_next = NULL; + memset(props, 0, sizeof(*props)); - err = dom_node_get_parent_node(n, &parent); - if (err != DOM_NO_ERR) { - dom_node_unref(n); - return NULL; - } + props->node_is_root = box_is_root(n); - assert(parent != NULL); + /* Extract properties from containing DOM node */ + if (props->node_is_root == false) { + dom_node *current_node = n; + dom_node *parent_node = NULL; + struct box *parent_box; + dom_exception err; - err = dom_node_get_next_sibling(parent, - &parent_next); - if (err != DOM_NO_ERR) { - dom_node_unref(parent); - dom_node_unref(n); - return NULL; - } + /* Find ancestor node containing parent box */ + while (true) { + err = dom_node_get_parent_node(current_node, + &parent_node); + if (err != DOM_NO_ERR || parent_node == NULL) + break; - if (parent_next != NULL) { - dom_node_unref(parent_next); - dom_node_unref(parent); - break; - } + parent_box = box_for_node(parent_node); - dom_node_unref(n); - n = parent; - parent = NULL; + if (parent_box != NULL) { + props->parent_style = parent_box->style; + props->href = parent_box->href; + props->target = parent_box->target; + props->title = parent_box->title; - if (box_for_node(n) != NULL) { - box_construct_element_after( - n, content); - } + dom_node_unref(parent_node); + break; + } else { + if (current_node != n) + dom_node_unref(current_node); + current_node = parent_node; + parent_node = NULL; } + } - if (box_is_root(n) == false) { - dom_node *parent = NULL; + /* Find containing block (may be parent) */ + while (true) { + struct box *b; - err = dom_node_get_parent_node(n, &parent); - if (err != DOM_NO_ERR) { - dom_node_unref(n); - return NULL; - } + err = dom_node_get_parent_node(current_node, + &parent_node); + if (err != DOM_NO_ERR || parent_node == NULL) { + if (current_node != n) + dom_node_unref(current_node); + break; + } - assert(parent != NULL); + if (current_node != n) + dom_node_unref(current_node); - err = dom_node_get_next_sibling(parent, &next); - if (err != DOM_NO_ERR) { - dom_node_unref(parent); - dom_node_unref(n); - return NULL; - } + b = box_for_node(parent_node); - if (box_for_node(parent) != NULL) { - box_construct_element_after(parent, - content); - } + /* Children of nodes that created an inline box + * will generate boxes which are attached as + * _siblings_ of the box generated for their + * parent node. Note, however, that we'll still + * use the parent node's styling as the parent + * style, above. */ + if (b != NULL && b->type != BOX_INLINE && + b->type != BOX_BR) { + props->containing_block = b; - dom_node_unref(parent); + dom_node_unref(parent_node); + break; + } else { + current_node = parent_node; + parent_node = NULL; } - - dom_node_unref(n); } } - return next; + /* Compute current inline container, if any */ + if (props->containing_block != NULL && + props->containing_block->last != NULL && + props->containing_block->last->type == + BOX_INLINE_CONTAINER) + props->inline_container = props->containing_block->last; } + /** - * Convert an ELEMENT node to a box tree fragment, - * then schedule conversion of the next ELEMENT node + * Get the style for an element. + * + * \param c content of type CONTENT_HTML that is being processed + * \param parent_style style at this point in xml tree, or NULL for root + * \param root_style root node's style, or NULL for root + * \param n node in xml tree + * \return the new style, or NULL on memory exhaustion */ -void convert_xml_to_box(struct box_construct_ctx *ctx) +static css_select_results * +box_get_style(html_content *c, + const css_computed_style *parent_style, + const css_computed_style *root_style, + dom_node *n) { - dom_node *next; - bool convert_children; - uint32_t num_processed = 0; - const uint32_t max_processed_before_yield = 10; - - do { - convert_children = true; - - assert(ctx->n != NULL); + dom_string *s = NULL; + css_stylesheet *inline_style = NULL; + css_select_results *styles; + nscss_select_ctx ctx; - if (box_construct_element(ctx, &convert_children) == false) { - ctx->cb(ctx->content, false); - dom_node_unref(ctx->n); - free(ctx); - return; + /* Firstly, construct inline stylesheet, if any */ + if (nsoption_bool(author_level_css)) { + dom_exception err; + err = dom_element_get_attribute(n, corestring_dom_style, &s); + if (err != DOM_NO_ERR) { + return NULL; } + } - /* Find next element to process, converting text nodes as we go */ - next = next_node(ctx->n, ctx->content, convert_children); - while (next != NULL) { - dom_node_type type; - dom_exception err; + if (s != NULL) { + inline_style = nscss_create_inline_style( + (const uint8_t *) dom_string_data(s), + dom_string_byte_length(s), + c->encoding, + nsurl_access(c->base_url), + c->quirks != DOM_DOCUMENT_QUIRKS_MODE_NONE); - err = dom_node_get_node_type(next, &type); - if (err != DOM_NO_ERR) { - ctx->cb(ctx->content, false); - dom_node_unref(next); - free(ctx); - return; - } + dom_string_unref(s); - if (type == DOM_ELEMENT_NODE) - break; + if (inline_style == NULL) + return NULL; + } - if (type == DOM_TEXT_NODE) { - ctx->n = next; - if (box_construct_text(ctx) == false) { - ctx->cb(ctx->content, false); - dom_node_unref(ctx->n); - free(ctx); - return; - } - } + /* Populate selection context */ + ctx.ctx = c->select_ctx; + ctx.quirks = (c->quirks == DOM_DOCUMENT_QUIRKS_MODE_FULL); + ctx.base_url = c->base_url; + ctx.universal = c->universal; + ctx.root_style = root_style; + ctx.parent_style = parent_style; - next = next_node(next, ctx->content, true); - } + /* Select style for element */ + styles = nscss_get_style(&ctx, n, &c->media, &c->unit_len_ctx, + inline_style); - ctx->n = next; + /* No longer need inline style */ + if (inline_style != NULL) + css_stylesheet_destroy(inline_style); - if (next == NULL) { - /* Conversion complete */ - struct box root; + return styles; +} - memset(&root, 0, sizeof(root)); - root.type = BOX_BLOCK; - root.children = root.last = ctx->root_box; - root.children->parent = &root; +/** + * Construct the box required for a generated element. + * + * \param n XML node of type XML_ELEMENT_NODE + * \param content Content of type CONTENT_HTML that is being processed + * \param box Box which may have generated content + * \param style Complete computed style for pseudo element, or NULL + * + * \todo This is currently incomplete. It just does enough to support + * the clearfix hack. (http://www.positioniseverything.net/easyclearing.html ) + */ +static void +box_construct_generate(dom_node *n, + html_content *content, + struct box *box, + const css_computed_style *style) +{ + struct box *gen = NULL; + enum css_display_e computed_display; + const css_computed_content_item *c_item; - /** \todo Remove box_normalise_block */ - if (box_normalise_block(&root, ctx->root_box, - ctx->content) == false) { - ctx->cb(ctx->content, false); - } else { - ctx->content->layout = root.children; - ctx->content->layout->parent = NULL; + /* Nothing to generate if the parent box is not a block */ + if (box->type != BOX_BLOCK) + return; - ctx->cb(ctx->content, true); - } + /* To determine if an element has a pseudo element, we select + * for it and test to see if the returned style's content + * property is set to normal. */ + if (style == NULL || + css_computed_content(style, &c_item) == + CSS_CONTENT_NORMAL) { + /* No pseudo element */ + return; + } - assert(ctx->n == NULL); + /* create box for this element */ + computed_display = ns_computed_display(style, box_is_root(n)); + if (computed_display == CSS_DISPLAY_BLOCK || + computed_display == CSS_DISPLAY_TABLE) { + /* currently only support block level boxes */ - free(ctx); + /** \todo Not wise to drop const from the computed style */ + gen = box_create(NULL, (css_computed_style *) style, + false, NULL, NULL, NULL, NULL, content->bctx); + if (gen == NULL) { return; } - } while (++num_processed < max_processed_before_yield); - /* More work to do: schedule a continuation */ - guit->misc->schedule(0, (void *)convert_xml_to_box, ctx); + /* set box type from computed display */ + gen->type = box_map[ns_computed_display( + style, box_is_root(n))]; + + box_add_child(box, gen); + } } + /** * Construct a list marker box * @@ -482,11 +364,15 @@ void convert_xml_to_box(struct box_construct_ctx *ctx) * \param parent Current block-level container * \return true on success, false on memory exhaustion */ -static bool box_construct_marker(struct box *box, const char *title, - struct box_construct_ctx *ctx, struct box *parent) +static bool +box_construct_marker(struct box *box, + const char *title, + struct box_construct_ctx *ctx, + struct box *parent) { lwc_string *image_uri; struct box *marker; + enum css_list_style_type_e list_style_type; marker = box_create(NULL, box->style, false, NULL, NULL, title, NULL, ctx->bctx); @@ -495,81 +381,33 @@ static bool box_construct_marker(struct box *box, const char *title, marker->type = BOX_BLOCK; + list_style_type = css_computed_list_style_type(box->style); + /** \todo marker content (list-style-type) */ - switch (css_computed_list_style_type(box->style)) { + switch (list_style_type) { case CSS_LIST_STYLE_TYPE_DISC: /* 2022 BULLET */ marker->text = (char *) "\342\200\242"; marker->length = 3; break; + case CSS_LIST_STYLE_TYPE_CIRCLE: /* 25CB WHITE CIRCLE */ marker->text = (char *) "\342\227\213"; marker->length = 3; break; + case CSS_LIST_STYLE_TYPE_SQUARE: /* 25AA BLACK SMALL SQUARE */ marker->text = (char *) "\342\226\252"; marker->length = 3; break; - case CSS_LIST_STYLE_TYPE_DECIMAL: - case CSS_LIST_STYLE_TYPE_LOWER_ALPHA: - case CSS_LIST_STYLE_TYPE_LOWER_ROMAN: - case CSS_LIST_STYLE_TYPE_UPPER_ALPHA: - case CSS_LIST_STYLE_TYPE_UPPER_ROMAN: - default: - if (parent->last) { - struct box *last = parent->last; - - /* Drill down into last child of parent - * to find the list marker (if any) - * - * Floated list boxes end up as: - * - * parent - * BOX_INLINE_CONTAINER - * BOX_FLOAT_{LEFT,RIGHT} - * BOX_BLOCK <-- list box - * ... - */ - while (last != NULL && last->list_marker == NULL) { - struct box *last_inner = last; - - while (last_inner != NULL) { - if (last_inner->list_marker != NULL) - break; - if (last_inner->type == - BOX_INLINE_CONTAINER || - last_inner->type == - BOX_FLOAT_LEFT || - last_inner->type == - BOX_FLOAT_RIGHT) { - last_inner = last_inner->last; - } else { - last_inner = NULL; - } - } - if (last_inner != NULL) { - last = last_inner; - } else { - last = last->prev; - } - } - if (last && last->list_marker) { - marker->rows = last->list_marker->rows + 1; - } - } - - marker->text = talloc_array(ctx->bctx, char, 20); - if (marker->text == NULL) - return false; - - snprintf(marker->text, 20, "%u.", marker->rows); - marker->length = strlen(marker->text); - break; + default: + /* Numerical list counters get handled in layout. */ + /* Fall through. */ case CSS_LIST_STYLE_TYPE_NONE: - marker->text = 0; + marker->text = NULL; marker->length = 0; break; } @@ -588,9 +426,11 @@ static bool box_construct_marker(struct box *box, const char *title, if (error != NSERROR_OK) return false; - if (html_fetch_object(ctx->content, url, marker, image_types, - ctx->content->base.available_width, 1000, false) == - false) { + if (html_fetch_object(ctx->content, + url, + marker, + image_types, + false) == false) { nsurl_unref(url); return false; } @@ -603,147 +443,22 @@ static bool box_construct_marker(struct box *box, const char *title, return true; } -/** - * Construct the box required for a generated element. - * - * \param n XML node of type XML_ELEMENT_NODE - * \param content Content of type CONTENT_HTML that is being processed - * \param box Box which may have generated content - * \param style Complete computed style for pseudo element, or NULL - * - * TODO: - * This is currently incomplete. It just does enough to support the clearfix - * hack. ( http://www.positioniseverything.net/easyclearing.html ) - */ -static void box_construct_generate(dom_node *n, html_content *content, - struct box *box, const css_computed_style *style) +static inline bool box__style_is_float(const struct box *box) { - struct box *gen = NULL; - enum css_display_e computed_display; - const css_computed_content_item *c_item; - - /* Nothing to generate if the parent box is not a block */ - if (box->type != BOX_BLOCK) - return; - - /* To determine if an element has a pseudo element, we select - * for it and test to see if the returned style's content - * property is set to normal. */ - if (style == NULL || - css_computed_content(style, &c_item) == - CSS_CONTENT_NORMAL) { - /* No pseudo element */ - return; - } - - /* create box for this element */ - computed_display = ns_computed_display(style, box_is_root(n)); - if (computed_display == CSS_DISPLAY_BLOCK || - computed_display == CSS_DISPLAY_TABLE) { - /* currently only support block level boxes */ - - /** \todo Not wise to drop const from the computed style */ - gen = box_create(NULL, (css_computed_style *) style, - false, NULL, NULL, NULL, NULL, content->bctx); - if (gen == NULL) { - return; - } - - /* set box type from computed display */ - gen->type = box_map[ns_computed_display( - style, box_is_root(n))]; - - box_add_child(box, gen); - } + return css_computed_float(box->style) == CSS_FLOAT_LEFT || + css_computed_float(box->style) == CSS_FLOAT_RIGHT; } -/** - * Extract transient construction properties - * - * \param n Current DOM node to convert - * \param props Property object to populate - */ -static void box_extract_properties(dom_node *n, - struct box_construct_props *props) +static inline bool box__is_flex(const struct box *box) { - memset(props, 0, sizeof(*props)); - - props->node_is_root = box_is_root(n); - - /* Extract properties from containing DOM node */ - if (props->node_is_root == false) { - dom_node *current_node = n; - dom_node *parent_node = NULL; - struct box *parent_box; - dom_exception err; - - /* Find ancestor node containing parent box */ - while (true) { - err = dom_node_get_parent_node(current_node, - &parent_node); - if (err != DOM_NO_ERR || parent_node == NULL) - break; - - parent_box = box_for_node(parent_node); - - if (parent_box != NULL) { - props->parent_style = parent_box->style; - props->href = parent_box->href; - props->target = parent_box->target; - props->title = parent_box->title; - - dom_node_unref(parent_node); - break; - } else { - if (current_node != n) - dom_node_unref(current_node); - current_node = parent_node; - parent_node = NULL; - } - } - - /* Find containing block (may be parent) */ - while (true) { - struct box *b; - - err = dom_node_get_parent_node(current_node, - &parent_node); - if (err != DOM_NO_ERR || parent_node == NULL) { - if (current_node != n) - dom_node_unref(current_node); - break; - } - - if (current_node != n) - dom_node_unref(current_node); - - b = box_for_node(parent_node); - - /* Children of nodes that created an inline box - * will generate boxes which are attached as - * _siblings_ of the box generated for their - * parent node. Note, however, that we'll still - * use the parent node's styling as the parent - * style, above. */ - if (b != NULL && b->type != BOX_INLINE && - b->type != BOX_BR) { - props->containing_block = b; - - dom_node_unref(parent_node); - break; - } else { - current_node = parent_node; - parent_node = NULL; - } - } - } + return box->type == BOX_FLEX || box->type == BOX_INLINE_FLEX; +} - /* Compute current inline container, if any */ - if (props->containing_block != NULL && - props->containing_block->last != NULL && - props->containing_block->last->type == - BOX_INLINE_CONTAINER) - props->inline_container = props->containing_block->last; +static inline bool box__containing_block_is_flex( + const struct box_construct_props *props) +{ + return props->containing_block != NULL && + box__is_flex(props->containing_block); } /** @@ -753,15 +468,14 @@ static void box_extract_properties(dom_node *n, * \param convert_children Whether to convert children * \return true on success, false on memory exhaustion */ - -bool box_construct_element(struct box_construct_ctx *ctx, - bool *convert_children) +static bool +box_construct_element(struct box_construct_ctx *ctx, bool *convert_children) { dom_string *title0, *s; lwc_string *id = NULL; + enum css_display_e css_display; struct box *box = NULL, *old_box; css_select_results *styles = NULL; - struct element_entry *element; lwc_string *bgimage_uri; dom_exception err; struct box_construct_props props; @@ -839,8 +553,9 @@ bool box_construct_element(struct box_construct_ctx *ctx, if (s != NULL) { const char *val = dom_string_data(s); + /* Convert to a number, clamping to [1,1000] according to 4.9.11 */ if ('0' <= val[0] && val[0] <= '9') - box->columns = strtol(val, NULL, 10); + box->columns = clamp(strtol(val, NULL, 10), 1, 1000); dom_string_unref(s); } @@ -852,22 +567,22 @@ bool box_construct_element(struct box_construct_ctx *ctx, if (s != NULL) { const char *val = dom_string_data(s); + /* Convert to a number, clamping to [0,65534] according to 4.9.11 */ if ('0' <= val[0] && val[0] <= '9') - box->rows = strtol(val, NULL, 10); + box->rows = clamp(strtol(val, NULL, 10), 0, 65534); dom_string_unref(s); } + css_display = ns_computed_display_static(box->style); + /* Set box type from computed display */ if ((css_computed_position(box->style) == CSS_POSITION_ABSOLUTE || - css_computed_position(box->style) == - CSS_POSITION_FIXED) && - (ns_computed_display_static(box->style) == - CSS_DISPLAY_INLINE || - ns_computed_display_static(box->style) == - CSS_DISPLAY_INLINE_BLOCK || - ns_computed_display_static(box->style) == - CSS_DISPLAY_INLINE_TABLE)) { + css_computed_position(box->style) == CSS_POSITION_FIXED) && + (css_display == CSS_DISPLAY_INLINE || + css_display == CSS_DISPLAY_INLINE_BLOCK || + css_display == CSS_DISPLAY_INLINE_TABLE || + css_display == CSS_DISPLAY_INLINE_FLEX)) { /* Special case for absolute positioning: make absolute inlines * into inline block so that the boxes are constructed in an * inline container as if they were not absolutely positioned. @@ -881,24 +596,28 @@ bool box_construct_element(struct box_construct_ctx *ctx, /* Normal mapping */ box->type = box_map[ns_computed_display(box->style, props.node_is_root)]; + + if (props.containing_block->type == BOX_FLEX || + props.containing_block->type == BOX_INLINE_FLEX) { + /* Blockification */ + switch (box->type) { + case BOX_INLINE_FLEX: + box->type = BOX_FLEX; + break; + case BOX_INLINE_BLOCK: + box->type = BOX_BLOCK; + break; + default: + break; + } + } } - err = dom_node_get_node_name(ctx->n, &s); - if (err != DOM_NO_ERR || s == NULL) + if (convert_special_elements(ctx->n, + ctx->content, + box, + convert_children) == false) { return false; - - /* Special elements */ - element = bsearch(dom_string_data(s), element_table, - ELEMENT_TABLE_COUNT, sizeof(element_table[0]), - (int (*)(const void *, const void *)) strcasecmp); - - dom_string_unref(s); - - if (element != NULL) { - /* A special convert function exists for this element */ - if (element->convert(ctx->n, ctx->content, box, - convert_children) == false) - return false; } /* Handle the :before pseudo element */ @@ -944,8 +663,9 @@ bool box_construct_element(struct box_construct_ctx *ctx, (box->type == BOX_INLINE || box->type == BOX_BR || box->type == BOX_INLINE_BLOCK || - css_computed_float(box->style) == CSS_FLOAT_LEFT || - css_computed_float(box->style) == CSS_FLOAT_RIGHT) && + box->type == BOX_INLINE_FLEX || + (box__style_is_float(box) && + !box__containing_block_is_flex(&props))) && props.node_is_root == false) { /* Found an inline child of a block without a current container * (i.e. this box is the first child of its parent, or was @@ -977,10 +697,11 @@ bool box_construct_element(struct box_construct_ctx *ctx, error = nsurl_create(lwc_string_data(bgimage_uri), &url); if (error == NSERROR_OK) { /* Fetch image if we got a valid URL */ - if (html_fetch_object(ctx->content, url, box, - image_types, - ctx->content->base.available_width, - 1000, true) == false) { + if (html_fetch_object(ctx->content, + url, + box, + image_types, + true) == false) { nsurl_unref(url); return false; } @@ -992,6 +713,7 @@ bool box_construct_element(struct box_construct_ctx *ctx, box->flags |= CONVERT_CHILDREN; if (box->type == BOX_INLINE || box->type == BOX_BR || + box->type == BOX_INLINE_FLEX || box->type == BOX_INLINE_BLOCK) { /* Inline container must exist, as we'll have * created it above if it didn't */ @@ -1008,6 +730,7 @@ bool box_construct_element(struct box_construct_ctx *ctx, } if (props.node_is_root == false && + box__containing_block_is_flex(&props) == false && (css_computed_float(box->style) == CSS_FLOAT_LEFT || css_computed_float(box->style) == @@ -1038,6 +761,7 @@ bool box_construct_element(struct box_construct_ctx *ctx, return true; } + /** * Complete construction of the box tree for an element. * @@ -1046,7 +770,7 @@ bool box_construct_element(struct box_construct_ctx *ctx, * * This will be called after all children of an element have been processed */ -void box_construct_element_after(dom_node *n, html_content *content) +static void box_construct_element_after(dom_node *n, html_content *content) { struct box_construct_props props; struct box *box = box_for_node(n); @@ -1105,14 +829,168 @@ void box_construct_element_after(dom_node *n, html_content *content) } } + +/** + * Find the next node in the DOM tree, completing element construction + * where appropriate. + * + * \param n Current node + * \param content Containing content + * \param convert_children Whether to consider children of \a n + * \return Next node to process, or NULL if complete + * + * \note \a n will be unreferenced + */ +static dom_node * +next_node(dom_node *n, html_content *content, bool convert_children) +{ + dom_node *next = NULL; + bool has_children; + dom_exception err; + + err = dom_node_has_child_nodes(n, &has_children); + if (err != DOM_NO_ERR) { + dom_node_unref(n); + return NULL; + } + + if (convert_children && has_children) { + err = dom_node_get_first_child(n, &next); + if (err != DOM_NO_ERR) { + dom_node_unref(n); + return NULL; + } + dom_node_unref(n); + } else { + err = dom_node_get_next_sibling(n, &next); + if (err != DOM_NO_ERR) { + dom_node_unref(n); + return NULL; + } + + if (next != NULL) { + if (box_for_node(n) != NULL) + box_construct_element_after(n, content); + dom_node_unref(n); + } else { + if (box_for_node(n) != NULL) + box_construct_element_after(n, content); + + while (box_is_root(n) == false) { + dom_node *parent = NULL; + dom_node *parent_next = NULL; + + err = dom_node_get_parent_node(n, &parent); + if (err != DOM_NO_ERR) { + dom_node_unref(n); + return NULL; + } + + assert(parent != NULL); + + err = dom_node_get_next_sibling(parent, + &parent_next); + if (err != DOM_NO_ERR) { + dom_node_unref(parent); + dom_node_unref(n); + return NULL; + } + + if (parent_next != NULL) { + dom_node_unref(parent_next); + dom_node_unref(parent); + break; + } + + dom_node_unref(n); + n = parent; + parent = NULL; + + if (box_for_node(n) != NULL) { + box_construct_element_after( + n, content); + } + } + + if (box_is_root(n) == false) { + dom_node *parent = NULL; + + err = dom_node_get_parent_node(n, &parent); + if (err != DOM_NO_ERR) { + dom_node_unref(n); + return NULL; + } + + assert(parent != NULL); + + err = dom_node_get_next_sibling(parent, &next); + if (err != DOM_NO_ERR) { + dom_node_unref(parent); + dom_node_unref(n); + return NULL; + } + + if (box_for_node(parent) != NULL) { + box_construct_element_after(parent, + content); + } + + dom_node_unref(parent); + } + + dom_node_unref(n); + } + } + + return next; +} + + +/** + * Apply the CSS text-transform property to given text for its ASCII chars. + * + * \param s string to transform + * \param len length of s + * \param tt transform type + */ +static void +box_text_transform(char *s, unsigned int len, enum css_text_transform_e tt) +{ + unsigned int i; + if (len == 0) + return; + switch (tt) { + case CSS_TEXT_TRANSFORM_UPPERCASE: + for (i = 0; i < len; ++i) + if ((unsigned char) s[i] < 0x80) + s[i] = ascii_to_upper(s[i]); + break; + case CSS_TEXT_TRANSFORM_LOWERCASE: + for (i = 0; i < len; ++i) + if ((unsigned char) s[i] < 0x80) + s[i] = ascii_to_lower(s[i]); + break; + case CSS_TEXT_TRANSFORM_CAPITALIZE: + if ((unsigned char) s[0] < 0x80) + s[0] = ascii_to_upper(s[0]); + for (i = 1; i < len; ++i) + if ((unsigned char) s[i] < 0x80 && + ascii_is_space(s[i - 1])) + s[i] = ascii_to_upper(s[i]); + break; + default: + break; + } +} + + /** * Construct the box tree for an XML text node. * * \param ctx Tree construction context * \return true on success, false on memory exhaustion */ - -bool box_construct_text(struct box_construct_ctx *ctx) +static bool box_construct_text(struct box_construct_ctx *ctx) { struct box_construct_props props; struct box *box = NULL; @@ -1348,1763 +1226,164 @@ bool box_construct_text(struct box_construct_ctx *ctx) return true; } -/** - * Get the style for an element. - * - * \param c content of type CONTENT_HTML that is being processed - * \param parent_style style at this point in xml tree, or NULL for root - * \param root_style root node's style, or NULL for root - * \param n node in xml tree - * \return the new style, or NULL on memory exhaustion - */ -css_select_results *box_get_style(html_content *c, - const css_computed_style *parent_style, - const css_computed_style *root_style, dom_node *n) -{ - dom_string *s; - dom_exception err; - css_stylesheet *inline_style = NULL; - css_select_results *styles; - nscss_select_ctx ctx; - - /* Firstly, construct inline stylesheet, if any */ - err = dom_element_get_attribute(n, corestring_dom_style, &s); - if (err != DOM_NO_ERR) - return NULL; - - if (s != NULL) { - inline_style = nscss_create_inline_style( - (const uint8_t *) dom_string_data(s), - dom_string_byte_length(s), - c->encoding, - nsurl_access(c->base_url), - c->quirks != DOM_DOCUMENT_QUIRKS_MODE_NONE); - - dom_string_unref(s); - - if (inline_style == NULL) - return NULL; - } - - /* Populate selection context */ - ctx.ctx = c->select_ctx; - ctx.quirks = (c->quirks == DOM_DOCUMENT_QUIRKS_MODE_FULL); - ctx.base_url = c->base_url; - ctx.universal = c->universal; - ctx.root_style = root_style; - ctx.parent_style = parent_style; - - /* Select style for element */ - styles = nscss_get_style(&ctx, n, &c->media, inline_style); - - /* No longer need inline style */ - if (inline_style != NULL) - css_stylesheet_destroy(inline_style); - - return styles; -} - - -/** - * Apply the CSS text-transform property to given text for its ASCII chars. - * - * \param s string to transform - * \param len length of s - * \param tt transform type - */ - -void box_text_transform(char *s, unsigned int len, enum css_text_transform_e tt) -{ - unsigned int i; - if (len == 0) - return; - switch (tt) { - case CSS_TEXT_TRANSFORM_UPPERCASE: - for (i = 0; i < len; ++i) - if ((unsigned char) s[i] < 0x80) - s[i] = toupper(s[i]); - break; - case CSS_TEXT_TRANSFORM_LOWERCASE: - for (i = 0; i < len; ++i) - if ((unsigned char) s[i] < 0x80) - s[i] = tolower(s[i]); - break; - case CSS_TEXT_TRANSFORM_CAPITALIZE: - if ((unsigned char) s[0] < 0x80) - s[0] = toupper(s[0]); - for (i = 1; i < len; ++i) - if ((unsigned char) s[i] < 0x80 && - isspace(s[i - 1])) - s[i] = toupper(s[i]); - break; - default: - break; - } -} - - -/** - * \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. - * - * \{ - */ - -/** - * Document body [7.5.1]. - */ - -bool box_body(BOX_SPECIAL_PARAMS) -{ - 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; -} - - -/** - * Forced line break [9.3.2]. - */ - -bool box_br(BOX_SPECIAL_PARAMS) -{ - box->type = BOX_BR; - return true; -} - -/** - * Preformatted text [9.3.4]. - */ - -bool box_pre(BOX_SPECIAL_PARAMS) -{ - box->flags |= PRE_STRIP; - return true; -} - -/** - * Anchor [12.2]. - */ - -bool box_a(BOX_SPECIAL_PARAMS) -{ - 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; -} - - -/** - * Embedded image [13.2]. - */ - -bool box_image(BOX_SPECIAL_PARAMS) -{ - 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; -} - - -/** - * Noscript element - */ - -bool box_noscript(BOX_SPECIAL_PARAMS) -{ - /* If scripting is enabled, do not display the contents of noscript */ - if (content->enable_scripting) - *convert_children = false; - - return true; -} - - -/** - * Destructor for object_params, for <object> 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; -} /** - * Generic embedded object [13.3]. + * Convert an ELEMENT node to a box tree fragment, + * then schedule conversion of the next ELEMENT node */ - -bool box_object(BOX_SPECIAL_PARAMS) +static void convert_xml_to_box(struct box_construct_ctx *ctx) { - 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, - ¶ms->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, ¶ms->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, ¶ms->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, - ¶ms->codetype) == false) - return false; - if (box_get_attribute(n, "type", params, ¶ms->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); - } + dom_node *next; + bool convert_children; + uint32_t num_processed = 0; + const uint32_t max_processed_before_yield = 10; - /* add parameters to linked list */ - err = dom_node_get_first_child(n, &c); - if (err != DOM_NO_ERR) - return false; + do { + convert_children = true; - while (c != NULL) { - dom_node *next; - dom_node_type type; + assert(ctx->n != NULL); - err = dom_node_get_node_type(c, &type); - if (err != DOM_NO_ERR) { - dom_node_unref(c); - return false; + if (box_construct_element(ctx, &convert_children) == false) { + ctx->cb(ctx->content, false); + dom_node_unref(ctx->n); + free(ctx); + return; } - if (type == DOM_ELEMENT_NODE) { - dom_string *name; + /* Find next element to process, converting text nodes as we go */ + next = next_node(ctx->n, ctx->content, convert_children); + while (next != NULL) { + dom_node_type type; + dom_exception err; - err = dom_node_get_node_name(c, &name); + err = dom_node_get_node_type(next, &type); if (err != DOM_NO_ERR) { - dom_node_unref(c); - return false; + ctx->cb(ctx->content, false); + dom_node_unref(next); + free(ctx); + return; } - 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_node_unref(c); + if (type == DOM_ELEMENT_NODE) break; - } - - 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, - ¶m->name) == false) { - dom_node_unref(c); - return false; - } - - if (box_get_attribute(c, "value", param, - ¶m->value) == false) { - dom_node_unref(c); - return false; - } - - if (box_get_attribute(c, "type", param, - ¶m->type) == false) { - dom_node_unref(c); - return false; - } - - if (box_get_attribute(c, "valuetype", param, - ¶m->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; + if (type == DOM_TEXT_NODE) { + ctx->n = next; + if (box_construct_text(ctx) == false) { + ctx->cb(ctx->content, false); + dom_node_unref(ctx->n); + free(ctx); + return; } } - 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; -} - - -/** - * Window subdivision [16.2.1]. - */ - -bool box_frameset(BOX_SPECIAL_PARAMS) -{ - 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; -} - - -/** - * 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; -} - - -/** - * 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; -} - - -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; + next = next_node(next, ctx->content, true); } - } - 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); - } + ctx->n = next; - 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); - } + if (next == NULL) { + /* Conversion complete */ + struct box root; - err = dom_element_get_attribute(c, corestring_dom_bordercolor, - &s); - if (err == DOM_NO_ERR && s != NULL) { - css_color color; + memset(&root, 0, sizeof(root)); - if (nscss_parse_colour(dom_string_data(s), - &color)) - frame->border_colour = - nscss_color_to_ns(color); + root.type = BOX_BLOCK; + root.children = root.last = ctx->root_box; + root.children->parent = &root; - dom_string_unref(s); - } + /** \todo Remove box_normalise_block */ + if (box_normalise_block(&root, ctx->root_box, + ctx->content) == false) { + ctx->cb(ctx->content, false); + } else { + ctx->content->layout = root.children; + ctx->content->layout->parent = NULL; - /* advance */ - err = dom_node_get_next_sibling(c, &next); - if (err != DOM_NO_ERR) { - dom_node_unref(c); - return false; + ctx->cb(ctx->content, true); } - 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 <iframe> 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; -} - - -/** - * Inline subwindow [16.5]. - */ - -bool box_iframe(BOX_SPECIAL_PARAMS) -{ - 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; -} - - -/** - * 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); -} - - -/** - * Form control [17.4]. - */ - -bool box_input(BOX_SPECIAL_PARAMS) -{ - 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; - } - + assert(ctx->n == NULL); - 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); - } + free(ctx); + return; } - } 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; -} - - -/** - * Push button [17.5]. - */ - -bool box_button(BOX_SPECIAL_PARAMS) -{ - 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 */ + } while (++num_processed < max_processed_before_yield); - return true; + /* More work to do: schedule a continuation */ + guit->misc->schedule(0, (void *)convert_xml_to_box, ctx); } -/** - * Option selector [17.6]. - */ - -bool box_select(BOX_SPECIAL_PARAMS) +/* exported function documented in html/box_construct.h */ +nserror +dom_to_box(dom_node *n, + html_content *c, + box_construct_complete_cb cb, + void **box_conversion_context) { - 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; - } + struct box_construct_ctx *ctx; - dom_node_unref(c2); - c2 = next2; - } - } else { - dom_string_unref(name); - } + assert(box_conversion_context != NULL); - err = dom_node_get_next_sibling(c, &next); - if (err != DOM_NO_ERR) { - dom_node_unref(c); - form_free_control(gadget); - return false; + if (c->bctx == NULL) { + /* create a context allocation for this box tree */ + c->bctx = talloc_zero(0, int); + if (c->bctx == NULL) { + return NSERROR_NOMEM; } - - 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; -} - - -/** - * Add an option to a form select control (helper function for box_select()). - * - * \param control select containing the <option> - * \param n xml element node for <option> - * \return true on success, false on memory exhaustion - */ - -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; + ctx = malloc(sizeof(*ctx)); + if (ctx == NULL) { + return NSERROR_NOMEM; } - /* 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; -} - - -/** - * Multi-line text field [17.7]. - */ - -bool box_textarea(BOX_SPECIAL_PARAMS) -{ - /* 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; + ctx->content = c; + ctx->n = dom_node_ref(n); + ctx->root_box = NULL; + ctx->cb = cb; + ctx->bctx = c->bctx; - if (!box_input_text(content, box, n)) - return false; + *box_conversion_context = ctx; - *convert_children = false; - return true; + return guit->misc->schedule(0, (void *)convert_xml_to_box, ctx); } -/** - * Embedded object (not in any HTML specification: - * see http://wp.netscape.com/assist/net_sites/new_html3_prop.html ) - */ - -bool box_embed(BOX_SPECIAL_PARAMS) +/* exported function documented in html/box_construct.h */ +nserror cancel_dom_to_box(void *box_conversion_context) { - 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, - ¶ms->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_namednodemap_unref(attrs); - return false; - } - - if (dom_string_caseless_lwc_isequal(name, corestring_lwc_src)) { - dom_string_unref(name); - continue; - } - - err = dom_attr_get_value(attr, &value); - if (err != DOM_NO_ERR) { - dom_string_unref(name); - dom_namednodemap_unref(attrs); - return false; - } - - param = talloc(content->bctx, struct object_param); - if (param == NULL) { - 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); - - if (param->name == NULL || param->value == NULL || - param->valuetype == NULL) { - dom_namednodemap_unref(attrs); - return false; - } + struct box_construct_ctx *ctx = box_conversion_context; + nserror err; - param->next = params->params; - params->params = param; + err = guit->misc->schedule(-1, (void *)convert_xml_to_box, ctx); + if (err != NSERROR_OK) { + return err; } - dom_namednodemap_unref(attrs); - - box->object_params = params; + dom_node_unref(ctx->n); + free(ctx); - /* start fetch */ - box->flags |= IS_REPLACED; - return html_fetch_object(content, params->data, box, CONTENT_ANY, - content->base.available_width, 1000, false); + return NSERROR_OK; } -/** - * \} - */ - -/** - * Get the value of an XML element's attribute. - * - * \param n xmlNode, of type XML_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 that returning true does not imply that the attribute was found. If the - * attribute was not found, *value will be unchanged. - */ - -bool box_get_attribute(dom_node *n, const char *attribute, - void *context, char **value) +/* exported function documented in html/box_construct.h */ +struct box *box_for_node(dom_node *n) { - char *result; - dom_string *attr, *attr_name; + struct box *box = NULL; dom_exception err; - err = dom_string_create_interned((const uint8_t *) attribute, - strlen(attribute), &attr_name); + err = dom_node_get_user_data(n, corestring_dom___ns_key_box_node_data, + (void *) &box); 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 NULL; - return true; + return box; } - -/* exported function documented in html/box.h */ +/* exported function documented in html/box_construct.h */ bool box_extract_link(const html_content *content, const dom_string *dsrel, |