diff options
Diffstat (limited to 'render/box.c')
| -rw-r--r-- | render/box.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/render/box.c b/render/box.c new file mode 100644 index 000000000..dd3796e3d --- /dev/null +++ b/render/box.c @@ -0,0 +1,174 @@ +/** + * $Id: box.c,v 1.1 2002/05/04 19:57:18 bursa Exp $ + */ + +#include <assert.h> +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "libxml/HTMLparser.h" +#include "css.h" +#include "font.h" +#include "box.h" +#include "utils.h" + +/** + * internal functions + */ + +void box_add_child(struct box * parent, struct box * child); + + +/** + * add a child to a box tree node + */ + +void box_add_child(struct box * parent, struct box * child) +{ + if (parent->children) /* has children already */ + parent->last->next = child; + else /* this is the first child */ + parent->children = child; + + parent->last = child; + child->parent = parent; +} + + +/** + * make a box tree with style data from an xml tree + * + * arguments: + * n xml tree + * parent_style style at this point in xml tree + * stylesheet stylesheet to use + * selector element selector hierachy to this point + * depth depth in xml tree + * parent parent in box tree + * inline_container current inline container box, or 0 + * + * returns: + * updated current inline container + */ + +struct box * xml_to_box(xmlNode * n, struct css_style * parent_style, struct css_stylesheet * stylesheet, + struct css_selector ** selector, unsigned int depth, + struct box * parent, struct box * inline_container) +{ + struct box * box; + struct box * inline_container_c; + struct css_style * style; + xmlNode * c; + + if (n->type == XML_ELEMENT_NODE) { + /* work out the style for this element */ + *selector = xrealloc(*selector, (depth + 1) * sizeof(struct css_selector)); + (*selector)[depth].element = n->name; + (*selector)[depth].class = (*selector)[depth].id = 0; + + style = xcalloc(1, sizeof(struct css_style)); + memcpy(style, parent_style, sizeof(struct css_style)); + css_get_style(stylesheet, *selector, depth + 1, style); + + switch (style->display) { + case CSS_DISPLAY_BLOCK: /* blocks get a node in the box tree */ + box = xcalloc(1, sizeof(struct box)); + box->node = n; + box->type = BOX_BLOCK; + box->style = style; + box_add_child(parent, box); + inline_container_c = 0; + for (c = n->children; c != 0; c = c->next) + inline_container_c = xml_to_box(c, style, stylesheet, + selector, depth + 1, box, inline_container_c); + inline_container = 0; + break; + case CSS_DISPLAY_INLINE: /* inline elements get no box, but their children do */ + for (c = n->children; c != 0; c = c->next) + inline_container = xml_to_box(c, style, stylesheet, + selector, depth + 1, parent, inline_container); + break; + case CSS_DISPLAY_TABLE: + box = xcalloc(1, sizeof(struct box)); + box->node = n; + box->type = BOX_TABLE; + box->style = style; + box_add_child(parent, box); + for (c = n->children; c != 0; c = c->next) + xml_to_box(c, style, stylesheet, + selector, depth + 1, box, 0); + inline_container = 0; + break; + case CSS_DISPLAY_TABLE_ROW: + box = xcalloc(1, sizeof(struct box)); + box->node = n; + box->type = BOX_TABLE_ROW; + box->style = style; + box_add_child(parent, box); + for (c = n->children; c != 0; c = c->next) + xml_to_box(c, style, stylesheet, + selector, depth + 1, box, 0); + inline_container = 0; + break; + case CSS_DISPLAY_TABLE_CELL: + box = xcalloc(1, sizeof(struct box)); + box->node = n; + box->type = BOX_TABLE_CELL; + box->style = style; + box_add_child(parent, box); + inline_container_c = 0; + for (c = n->children; c != 0; c = c->next) + inline_container_c = xml_to_box(c, style, stylesheet, + selector, depth + 1, box, inline_container_c); + inline_container = 0; + break; + case CSS_DISPLAY_NONE: + default: + } + } else if (n->type == XML_TEXT_NODE) { + /* text nodes are converted to inline boxes, wrapped in an inline container block */ + if (inline_container == 0) { /* this is the first inline node: make a container */ + inline_container = xcalloc(1, sizeof(struct box)); + inline_container->type = BOX_INLINE_CONTAINER; + box_add_child(parent, inline_container); + } + box = calloc(1, sizeof(struct box)); + box->node = n; + box->type = BOX_INLINE; + box->text = n->content; + box_add_child(inline_container, box); + } + + return inline_container; +} + + +/* + * print a box tree to standard output + */ + +void box_dump(struct box * box, unsigned int depth) +{ + unsigned int i; + struct box * c; + + for (i = 0; i < depth; i++) + printf(" "); + + printf("x%li y%li w%li h%li ", box->x, box->y, box->width, box->height); + + switch (box->type) { + case BOX_BLOCK: printf("BOX_BLOCK <%s>\n", box->node->name); break; + case BOX_INLINE_CONTAINER: printf("BOX_INLINE_CONTAINER\n"); break; + case BOX_INLINE: printf("BOX_INLINE '%s'\n", box->text); break; + case BOX_TABLE: printf("BOX_TABLE <%s>\n", box->node->name); break; + case BOX_TABLE_ROW: printf("BOX_TABLE_ROW <%s>\n", box->node->name); break; + case BOX_TABLE_CELL: printf("BOX_TABLE_CELL <%s>\n", box->node->name); break; + default: printf("Unknown box type\n"); + } + + for (c = box->children; c != 0; c = c->next) + box_dump(c, depth + 1); +} + |