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netsurf/css/ruleset.c
John Mark Bell 4e6974b523 Fix background: parsing & lose potential memory leak 
svn path=/trunk/netsurf/; revision=2660
2006-06-28 15:38:46 +00:00

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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004 John M Bell <jmb202@ecs.soton.ac.uk>
*/
/** \file
* CSS ruleset parsing.
*
* This file implements the last stage of CSS parsing. It converts trees of
* struct css_node produced by the parser into struct style, and adds them to a
* stylesheet.
*
* This code is complicated by the CSS error handling rules. According to
* CSS 2.1 4.2 "Illegal values", the whole of a declaration must be legal for
* any of it to be used.
*/
#define _GNU_SOURCE /* for strndup */
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#define CSS_INTERNALS
#define NDEBUG
#include "netsurf/css/css.h"
#include "netsurf/content/content.h"
#include "netsurf/desktop/options.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/url.h"
#include "netsurf/utils/utils.h"
static bool css_compare_selectors(const struct css_selector *n0,
const struct css_selector *n1);
static int parse_length(struct css_length * const length,
const struct css_node * const v, bool non_negative);
static colour parse_colour(const struct css_node * const v);
static colour css_parse_rgb(struct css_node *v);
static bool parse_uri(const struct css_node *v, char **uri);
static struct css_content *parse_content_new(struct css_content **current, css_content_type_generated generated);
static bool parse_content_counter(struct css_content **current, struct css_node *t, bool counters);
bool parse_counter_control_data(struct css_counter_control **current, const struct css_node * v, int empty);
struct css_counter_control *parse_counter_control_new(struct css_counter_control **current);
static void parse_background(struct css_style * const s,
const struct css_node * v);
static void parse_background_attachment(struct css_style * const s, const struct css_node * const v);
static void parse_background_color(struct css_style * const s, const struct css_node * const v);
static void parse_background_image(struct css_style * const s,
const struct css_node * const v);
static bool css_background_image_parse(const struct css_node *v,
css_background_image_type *type, char **uri);
static struct css_background_entry *css_background_lookup(
const struct css_node *v);
static void parse_background_position(struct css_style * const s,
const struct css_node * const v);
static bool css_background_position_parse(const struct css_node **node,
struct css_background_position *horz,
struct css_background_position *vert);
static void parse_background_repeat(struct css_style * const s, const struct css_node * const v);
static void parse_border(struct css_style * const s, const struct css_node * v);
static void parse_border_bottom(struct css_style * const s, const struct css_node * v);
static void parse_border_bottom_color(struct css_style * const s, const struct css_node * v);
static void parse_border_bottom_style(struct css_style * const s, const struct css_node * v);
static void parse_border_bottom_width(struct css_style * const s, const struct css_node * v);
static void parse_border_collapse(struct css_style * const s, const struct css_node * v);
static void parse_border_color(struct css_style * const s, const struct css_node * v);
static void parse_border_color_side(struct css_style * const s,
const struct css_node * const v, unsigned int i);
static void parse_border_left(struct css_style * const s, const struct css_node * v);
static void parse_border_left_color(struct css_style * const s, const struct css_node * v);
static void parse_border_left_style(struct css_style * const s, const struct css_node * v);
static void parse_border_left_width(struct css_style * const s, const struct css_node * v);
static void parse_border_right(struct css_style * const s, const struct css_node * v);
static void parse_border_right_color(struct css_style * const s, const struct css_node * v);
static void parse_border_right_style(struct css_style * const s, const struct css_node * v);
static void parse_border_right_width(struct css_style * const s, const struct css_node * v);
static void parse_border_side(struct css_style * const s,
const struct css_node *v, unsigned int i);
static void parse_border_spacing(struct css_style * const s, const struct css_node * v);
static void parse_border_style(struct css_style * const s, const struct css_node * v);
static void parse_border_style_side(struct css_style * const s,
const struct css_node * const v, unsigned int i);
static void parse_border_top(struct css_style * const s, const struct css_node * v);
static void parse_border_top_color(struct css_style * const s, const struct css_node * v);
static void parse_border_top_style(struct css_style * const s, const struct css_node * v);
static void parse_border_top_width(struct css_style * const s, const struct css_node * v);
static void parse_border_width(struct css_style * const s, const struct css_node * v);
static void parse_border_width_side(struct css_style * const s,
const struct css_node * const v, unsigned int i);
static void parse_bottom(struct css_style * const s, const struct css_node * v);
static void parse_caption_side(struct css_style * const s, const struct css_node * v);
static void parse_clear(struct css_style * const s, const struct css_node * const v);
static void parse_clip(struct css_style * const s, const struct css_node * v);
static void parse_color(struct css_style * const s, const struct css_node * const v);
static void parse_content(struct css_style * const s, const struct css_node * v);
static void parse_counter_increment(struct css_style * const s, const struct css_node * v);
static void parse_counter_reset(struct css_style * const s, const struct css_node * v);
static void parse_cursor(struct css_style * const s, const struct css_node * v);
static void parse_direction(struct css_style * const s, const struct css_node * v);
static void parse_display(struct css_style * const s, const struct css_node * const v);
static void parse_empty_cells(struct css_style * const s, const struct css_node * v);
static void parse_float(struct css_style * const s, const struct css_node * const v);
static void parse_font(struct css_style * const s, const struct css_node * v);
static void parse_font_family(struct css_style * const s, const struct css_node * v);
static void parse_font_size(struct css_style * const s, const struct css_node * const v);
static void parse_font_style(struct css_style * const s, const struct css_node * const v);
static void parse_font_variant(struct css_style * const s, const struct css_node * const v);
static void parse_font_weight(struct css_style * const s, const struct css_node * const v);
static void parse_height(struct css_style * const s, const struct css_node * const v);
static void parse_left(struct css_style * const s, const struct css_node * v);
static void parse_letter_spacing(struct css_style * const s, const struct css_node * v);
static void parse_line_height(struct css_style * const s, const struct css_node * const v);
static void parse_list_style(struct css_style * const s, const struct css_node * v);
static void parse_list_style_image(struct css_style * const s, const struct css_node * v);
static bool css_list_style_image_parse(const struct css_node *v,
css_list_style_image_type *type, char **uri);
static void parse_list_style_position(struct css_style * const s, const struct css_node * v);
static void parse_list_style_type(struct css_style * const s, const struct css_node * v);
static void parse_margin(struct css_style * const s, const struct css_node * const v);
static void parse_margin_bottom(struct css_style * const s, const struct css_node * const v);
static void parse_margin_left(struct css_style * const s, const struct css_node * const v);
static void parse_margin_right(struct css_style * const s, const struct css_node * const v);
static void parse_margin_top(struct css_style * const s, const struct css_node * const v);
static void parse_margin_side(struct css_style * const s, const struct css_node * const v,
unsigned int i);
static void parse_max_height(struct css_style *const s, const struct css_node * v);
static void parse_max_width(struct css_style *const s, const struct css_node * v);
static void parse_min_height(struct css_style *const s, const struct css_node * v);
static void parse_min_width(struct css_style *const s, const struct css_node * v);
static void parse_orphans(struct css_style * const s, const struct css_node * const v);
static void parse_outline(struct css_style * const s, const struct css_node * v);
static void parse_outline_color(struct css_style * const s, const struct css_node * const v);
static void parse_outline_style(struct css_style * const s, const struct css_node * const v);
static void parse_outline_width(struct css_style * const s, const struct css_node * const v);
static bool css_outline_width_parse(const struct css_node * v, struct css_border_width * w);
static void parse_overflow(struct css_style * const s, const struct css_node * const v);
static void parse_padding(struct css_style * const s, const struct css_node * const v);
static void parse_padding_bottom(struct css_style * const s, const struct css_node * const v);
static void parse_padding_left(struct css_style * const s, const struct css_node * const v);
static void parse_padding_right(struct css_style * const s, const struct css_node * const v);
static void parse_padding_top(struct css_style * const s, const struct css_node * const v);
static void parse_padding_side(struct css_style * const s, const struct css_node * const v,
unsigned int i);
static void parse_page_break_after(struct css_style * const s, const struct css_node * v);
static void parse_page_break_before(struct css_style * const s, const struct css_node * v);
static void parse_page_break_inside(struct css_style * const s, const struct css_node * v);
static void parse_pos(struct css_style * const s, const struct css_node * v, unsigned int i);
static void parse_position(struct css_style * const s, const struct css_node * v);
static void parse_right(struct css_style * const s, const struct css_node * v);
static void parse_table_layout(struct css_style * const s, const struct css_node * v);
static void parse_text_align(struct css_style * const s, const struct css_node * const v);
static void parse_text_decoration(struct css_style * const s, const struct css_node * const v);
static void parse_text_indent(struct css_style * const s, const struct css_node * const v);
static void parse_text_transform(struct css_style * const s, const struct css_node * const v);
static void parse_top(struct css_style * const s, const struct css_node * v);
static void parse_unicode_bidi(struct css_style * const s, const struct css_node * const v);
static void parse_vertical_align(struct css_style * const s, const struct css_node * v);
static void parse_visibility(struct css_style * const s, const struct css_node * const v);
static void parse_widows(struct css_style * const s, const struct css_node * const v);
static void parse_width(struct css_style * const s, const struct css_node * const v);
static void parse_white_space(struct css_style * const s, const struct css_node * const v);
static void parse_word_spacing(struct css_style * const s, const struct css_node * v);
static void parse_z_index(struct css_style * const s, const struct css_node * const v);
static css_text_decoration css_text_decoration_parse(const char * const s,
int length);
/** An entry in css_property_table. */
struct css_property_entry {
const char name[25];
void (*parse) (struct css_style * const s,
const struct css_node * const v);
};
/** Table of property parsers. MUST be sorted by property name. */
static const struct css_property_entry css_property_table[] = {
{ "background", parse_background },
{ "background-attachment", parse_background_attachment },
{ "background-color", parse_background_color },
{ "background-image", parse_background_image },
{ "background-position", parse_background_position },
{ "background-repeat", parse_background_repeat },
{ "border", parse_border },
{ "border-bottom", parse_border_bottom },
{ "border-bottom-color", parse_border_bottom_color },
{ "border-bottom-style", parse_border_bottom_style },
{ "border-bottom-width", parse_border_bottom_width },
{ "border-collapse", parse_border_collapse },
{ "border-color", parse_border_color },
{ "border-left", parse_border_left },
{ "border-left-color", parse_border_left_color },
{ "border-left-style", parse_border_left_style },
{ "border-left-width", parse_border_left_width },
{ "border-right", parse_border_right },
{ "border-right-color", parse_border_right_color },
{ "border-right-style", parse_border_right_style },
{ "border-right-width", parse_border_right_width },
{ "border-spacing", parse_border_spacing },
{ "border-style", parse_border_style },
{ "border-top", parse_border_top },
{ "border-top-color", parse_border_top_color },
{ "border-top-style", parse_border_top_style },
{ "border-top-width", parse_border_top_width },
{ "border-width", parse_border_width },
{ "bottom", parse_bottom },
{ "caption-side", parse_caption_side },
{ "clear", parse_clear },
{ "clip", parse_clip },
{ "color", parse_color },
{ "content", parse_content },
{ "counter-increment", parse_counter_increment },
{ "counter-reset", parse_counter_reset },
{ "cursor", parse_cursor },
{ "direction", parse_direction },
{ "display", parse_display },
{ "empty-cells", parse_empty_cells },
{ "float", parse_float },
{ "font", parse_font },
{ "font-family", parse_font_family },
{ "font-size", parse_font_size },
{ "font-style", parse_font_style },
{ "font-variant", parse_font_variant },
{ "font-weight", parse_font_weight },
{ "height", parse_height },
{ "left", parse_left },
{ "letter-spacing", parse_letter_spacing },
{ "line-height", parse_line_height },
{ "list-style", parse_list_style },
{ "list-style-image", parse_list_style_image },
{ "list-style-position", parse_list_style_position },
{ "list-style-type", parse_list_style_type },
{ "margin", parse_margin },
{ "margin-bottom", parse_margin_bottom },
{ "margin-left", parse_margin_left },
{ "margin-right", parse_margin_right },
{ "margin-top", parse_margin_top },
{ "max-height", parse_max_height },
{ "max-width", parse_max_width },
{ "min-height", parse_min_height },
{ "min-width", parse_min_width },
{ "orphans", parse_orphans },
{ "outline", parse_outline },
{ "outline-color", parse_outline_color },
{ "outline-style", parse_outline_style },
{ "outline-width", parse_outline_width },
{ "overflow", parse_overflow },
{ "padding", parse_padding },
{ "padding-bottom", parse_padding_bottom },
{ "padding-left", parse_padding_left },
{ "padding-right", parse_padding_right },
{ "padding-top", parse_padding_top },
{ "page-break-after", parse_page_break_after },
{ "page-break-before", parse_page_break_before },
{ "page-break-inside", parse_page_break_inside },
{ "position", parse_position },
{ "right", parse_right },
{ "table-layout", parse_table_layout },
{ "text-align", parse_text_align },
{ "text-decoration", parse_text_decoration },
{ "text-indent", parse_text_indent },
{ "text-transform", parse_text_transform },
{ "top", parse_top },
{ "unicode-bidi", parse_unicode_bidi },
{ "vertical-align", parse_vertical_align },
{ "visibility", parse_visibility },
{ "white-space", parse_white_space },
{ "widows", parse_widows },
{ "width", parse_width },
{ "word-spacing", parse_word_spacing },
{ "z-index", parse_z_index }
};
/** An entry in css_colour_table. */
struct css_colour_entry {
const char name[21];
colour col;
};
/* Table of standard colour names. MUST be sorted by colour name.
* Note: colour is 0xbbggrr. */
static const struct css_colour_entry css_colour_table[] = {
{ "aliceblue", 0xfff8f0 },
{ "antiquewhite", 0xd7ebfa },
{ "aqua", 0xffff00 },
{ "aquamarine", 0xd4ff7f },
{ "azure", 0xfffff0 },
{ "beige", 0xdcf5f5 },
{ "bisque", 0xc4e4ff },
{ "black", 0x000000 },
{ "blanchedalmond", 0xcdebff },
{ "blue", 0xff0000 },
{ "blueviolet", 0xe22b8a },
{ "brown", 0x2a2aa5 },
{ "burlywood", 0x87b8de },
{ "cadetblue", 0xa09e5f },
{ "chartreuse", 0x00ff7f },
{ "chocolate", 0x1e69d2 },
{ "coral", 0x507fff },
{ "cornflowerblue", 0xed9564 },
{ "cornsilk", 0xdcf8ff },
{ "crimson", 0x3c14dc },
{ "cyan", 0xffff00 },
{ "darkblue", 0x8b0000 },
{ "darkcyan", 0x8b8b00 },
{ "darkgoldenrod", 0x0b86b8 },
{ "darkgray", 0xa9a9a9 },
{ "darkgreen", 0x006400 },
{ "darkgrey", 0xa9a9a9 },
{ "darkkhaki", 0x6bb7bd },
{ "darkmagenta", 0x8b008b },
{ "darkolivegreen", 0x2f6b55 },
{ "darkorange", 0x008cff },
{ "darkorchid", 0xcc3299 },
{ "darkred", 0x00008b },
{ "darksalmon", 0x7a96e9 },
{ "darkseagreen", 0x8fbc8f },
{ "darkslateblue", 0x8b3d48 },
{ "darkslategray", 0x4f4f2f },
{ "darkslategrey", 0x4f4f2f },
{ "darkturquoise", 0xd1ce00 },
{ "darkviolet", 0xd30094 },
{ "deeppink", 0x9314ff },
{ "deepskyblue", 0xffbf00 },
{ "dimgray", 0x696969 },
{ "dimgrey", 0x696969 },
{ "dodgerblue", 0xff901e },
{ "feldspar", 0x7592d1 }, /* not SVG-1.0 */
{ "firebrick", 0x2222b2 },
{ "floralwhite", 0xf0faff },
{ "forestgreen", 0x228b22 },
{ "fuchsia", 0xff00ff },
{ "gainsboro", 0xdcdcdc },
{ "ghostwhite", 0xfff8f8 },
{ "gold", 0x00d7ff },
{ "goldenrod", 0x20a5da },
{ "gray", 0x808080 },
{ "green", 0x008000 },
{ "greenyellow", 0x2fffad },
{ "grey", 0x808080 },
{ "honeydew", 0xf0fff0 },
{ "hotpink", 0xb469ff },
{ "indianred", 0x5c5ccd },
{ "indigo", 0x82004b },
{ "ivory", 0xf0ffff },
{ "khaki", 0x8ce6f0 },
{ "lavender", 0xfae6e6 },
{ "lavenderblush", 0xf5f0ff },
{ "lawngreen", 0x00fc7c },
{ "lemonchiffon", 0xcdfaff },
{ "lightblue", 0xe6d8ad },
{ "lightcoral", 0x8080f0 },
{ "lightcyan", 0xffffe0 },
{ "lightgoldenrodyellow", 0xd2fafa },
{ "lightgray", 0xd3d3d3 },
{ "lightgreen", 0x90ee90 },
{ "lightgrey", 0xd3d3d3 },
{ "lightpink", 0xc1b6ff },
{ "lightsalmon", 0x7aa0ff },
{ "lightseagreen", 0xaab220 },
{ "lightskyblue", 0xface87 },
{ "lightslateblue", 0xff7084 }, /* not SVG-1.0*/
{ "lightslategray", 0x998877 },
{ "lightslategrey", 0x998877 },
{ "lightsteelblue", 0xdec4b0 },
{ "lightyellow", 0xe0ffff },
{ "lime", 0x00ff00 },
{ "limegreen", 0x32cd32 },
{ "linen", 0xe6f0fa },
{ "magenta", 0xff00ff },
{ "maroon", 0x000080 },
{ "mediumaquamarine", 0xaacd66 },
{ "mediumblue", 0xcd0000 },
{ "mediumorchid", 0xd355ba },
{ "mediumpurple", 0xdb7093 },
{ "mediumseagreen", 0x71b33c },
{ "mediumslateblue", 0xee687b },
{ "mediumspringgreen", 0x9afa00 },
{ "mediumturquoise", 0xccd148 },
{ "mediumvioletred", 0x8515c7 },
{ "midnightblue", 0x701919 },
{ "mintcream", 0xfafff5 },
{ "mistyrose", 0xe1e4ff },
{ "moccasin", 0xb5e4ff },
{ "navajowhite", 0xaddeff },
{ "navy", 0x800000 },
{ "oldlace", 0xe6f5fd },
{ "olive", 0x008080 },
{ "olivedrab", 0x238e6b },
{ "orange", 0x00a5ff },
{ "orangered", 0x0045ff },
{ "orchid", 0xd670da },
{ "palegoldenrod", 0xaae8ee },
{ "palegreen", 0x98fb98 },
{ "paleturquoise", 0xeeeeaf },
{ "palevioletred", 0x9370db },
{ "papayawhip", 0xd5efff },
{ "peachpuff", 0xb9daff },
{ "peru", 0x3f85cd },
{ "pink", 0xcbc0ff },
{ "plum", 0xdda0dd },
{ "powderblue", 0xe6e0b0 },
{ "purple", 0x800080 },
{ "red", 0x0000ff },
{ "rosybrown", 0x8f8fbc },
{ "royalblue", 0xe16941 },
{ "saddlebrown", 0x13458b },
{ "salmon", 0x7280fa },
{ "sandybrown", 0x60a4f4 },
{ "seagreen", 0x578b2e },
{ "seashell", 0xeef5ff },
{ "sienna", 0x2d52a0 },
{ "silver", 0xc0c0c0 },
{ "skyblue", 0xebce87 },
{ "slateblue", 0xcd5a6a },
{ "slategray", 0x908070 },
{ "slategrey", 0x908070 },
{ "snow", 0xfafaff },
{ "springgreen", 0x7fff00 },
{ "steelblue", 0xb48246 },
{ "tan", 0x8cb4d2 },
{ "teal", 0x808000 },
{ "thistle", 0xd8bfd8 },
{ "tomato", 0x4763ff },
{ "transparent", TRANSPARENT },
{ "turquoise", 0xd0e040 },
{ "violet", 0xee82ee },
{ "violetred", 0x9020d0 }, /* not SVG-1.0*/
{ "wheat", 0xb3def5 },
{ "white", 0xffffff },
{ "whitesmoke", 0xf5f5f5 },
{ "yellow", 0x00ffff },
{ "yellowgreen", 0x32cd9a },
};
/** An entry in css_font_size_table. */
struct css_font_size_entry {
const char name[10];
float size;
};
/** Table of font sizes. MUST be sorted by name. */
#define SIZE_FACTOR 1.2
static const struct css_font_size_entry css_font_size_table[] = {
{ "large", 1.0 * SIZE_FACTOR },
{ "medium", 1.0 },
{ "small", 1.0 / SIZE_FACTOR },
{ "x-large", 1.0 * SIZE_FACTOR * SIZE_FACTOR },
{ "x-small", 1.0 / (SIZE_FACTOR * SIZE_FACTOR) },
{ "xx-large", 1.0 * SIZE_FACTOR * SIZE_FACTOR * SIZE_FACTOR },
{ "xx-small", 1.0 / (SIZE_FACTOR * SIZE_FACTOR * SIZE_FACTOR) },
};
/**
* Add a ruleset to a stylesheet.
*/
void css_add_ruleset(struct content *c,
struct css_selector *selector,
struct css_node *declaration)
{
bool found;
struct css_stylesheet *stylesheet = c->data.css.css;
struct css_selector *n, *sel, *next_sel, *prev;
struct css_style *style;
unsigned int hash;
for (sel = selector; sel != 0; sel = next_sel) {
next_sel = sel->next;
/* check if this selector is already present */
found = false;
prev = 0;
hash = css_hash(sel->data, sel->data_length);
/* selectors are ordered by specificity in the hash chain */
for (n = stylesheet->rule[hash];
n && n->specificity < sel->specificity;
n = n->next)
prev = n;
for ( ; n && n->specificity == sel->specificity;
n = n->next) {
prev = n;
if (css_compare_selectors(sel, n)) {
found = true;
break;
}
}
if (!found) {
/* not present: construct a new struct css_style */
LOG(("constructing new style"));
style = css_duplicate_style(&css_empty_style);
if (!style) {
/** \todo report to user */
css_free_selector(sel);
return;
}
sel->style = style;
sel->next = n;
if (prev)
prev->next = sel;
else
stylesheet->rule[hash] = sel;
c->size += sizeof(*style);
} else {
/* already exists: augument existing style */
LOG(("augumenting existing style"));
style = n->style;
sel->next = 0;
css_free_selector(sel);
}
/* fill in the declarations */
css_add_declarations(style, declaration);
}
}
/**
* Add declarations to a style.
*/
void css_add_declarations(struct css_style *style, struct css_node *declaration)
{
char name[25]; /* this must be the same length as p->name */
struct css_node *n;
for (n = declaration; n != 0; n = n->next) {
struct css_property_entry *p;
assert(n->type == CSS_NODE_DECLARATION && n->data && n->value);
if (24 < n->data_length)
continue;
strncpy(name, n->data, n->data_length);
name[n->data_length] = 0;
p = bsearch(name, css_property_table,
sizeof css_property_table /
sizeof css_property_table[0],
sizeof css_property_table[0],
(int (*)(const void *, const void *))
strcasecmp);
if (p == 0)
continue;
p->parse(style, n->value);
}
}
/**
* Compare two css_selectors.
*/
bool css_compare_selectors(const struct css_selector *n0,
const struct css_selector *n1)
{
struct css_selector *m0, *m1;
unsigned int count0 = 0, count1 = 0;
/* compare element name */
if (!((n0->data == 0 && n1->data == 0) ||
(n0->data != 0 && n1->data != 0 &&
n0->data_length == n1->data_length &&
strncmp(n0->data, n1->data, n0->data_length) == 0)))
return false;
if (n0->comb != n1->comb)
return false;
/* compare classes and ids */
for (m0 = n0->detail; m0 != 0; m0 = m0->next)
count0++;
for (m1 = n1->detail; m1 != 0; m1 = m1->next)
count1++;
if (count0 != count1)
return false;
for (m0 = n0->detail; m0 != 0; m0 = m0->next) {
bool found = false;
for (m1 = n1->detail; m1 != 0; m1 = m1->next) {
/* TODO: should this be case sensitive for IDs? */
if (m0->type == m1->type &&
m0->data_length == m1->data_length &&
strncasecmp(m0->data, m1->data,
m0->data_length) == 0 &&
((m0->data2 == 0 && m1->data2 == 0) ||
(m0->data2_length == m1->data2_length &&
strncasecmp(m0->data2, m1->data2,
m0->data2_length) == 0))) {
found = true;
break;
}
}
if (!found)
return false;
}
/* compare ancestors */
if (n0->comb == CSS_COMB_NONE)
return true;
return css_compare_selectors(n0->combiner, n1->combiner);
}
/*
* Property parsers.
*/
/* TODO: consider CSS_NODE_NUMBER whenever a value may be '0' */
int parse_length(struct css_length * const length,
const struct css_node * const v, bool non_negative)
{
css_unit u;
float value;
int num_length;
if (v->type == CSS_NODE_NUMBER && atof(v->data) == 0) {
length->unit = CSS_UNIT_PX;
length->value = 0;
return 0;
}
if (v->type != CSS_NODE_DIMENSION)
return 1;
num_length = strspn(v->data, "0123456789+-.");
u = css_unit_parse(v->data + num_length, v->data_length - num_length);
if (u == CSS_UNIT_UNKNOWN)
return 1;
value = atof(v->data);
if (non_negative && value < 0)
return 1;
length->unit = u;
length->value = value;
return 0;
}
colour named_colour(const char *name)
{
struct css_colour_entry *col;
unsigned int r, g, b;
col = bsearch(name, css_colour_table,
sizeof css_colour_table / sizeof css_colour_table[0],
sizeof css_colour_table[0],
(int (*)(const void *, const void *)) strcasecmp);
if (col == 0) {
/* A common error is the omission of the '#' from the
* start of a colour specified in #rrggbb format.
* This attempts to detect and recover from this.
*/
if (strlen(name) == 6 &&
sscanf(name, "%2x%2x%2x", &r, &g, &b) == 3) {
return (b << 16) | (g << 8) | r;
}
else
return TRANSPARENT;
}
return col->col;
}
colour parse_colour(const struct css_node * const v)
{
colour c = CSS_COLOR_NONE;
unsigned int r, g, b;
struct css_colour_entry *col;
char colour_name[21];
switch (v->type) {
case CSS_NODE_HASH:
if (v->data_length == 4) {
if (sscanf(v->data + 1, "%1x%1x%1x", &r, &g, &b) == 3)
c = (b << 20) | (b << 16) | (g << 12) | (g << 8) | (r << 4) | r;
} else if (v->data_length == 7) {
if (sscanf(v->data + 1, "%2x%2x%2x", &r, &g, &b) == 3)
c = (b << 16) | (g << 8) | r;
}
break;
case CSS_NODE_FUNCTION:
if (v->data_length == 4 &&
strncasecmp(v->data, "rgb", 3) == 0)
c = css_parse_rgb(v->value);
break;
case CSS_NODE_IDENT:
if (20 < v->data_length)
break;
strncpy(colour_name, v->data, v->data_length);
colour_name[v->data_length] = 0;
col = bsearch(colour_name, css_colour_table,
sizeof css_colour_table /
sizeof css_colour_table[0],
sizeof css_colour_table[0],
(int (*)(const void *, const void *))
strcasecmp);
if (col != 0)
c = col->col;
break;
default:
break;
}
return c;
}
/**
* Parse an RGB value in functional notation.
*/
colour css_parse_rgb(struct css_node *v)
{
unsigned int i;
int c[3];
/* we expect exactly the nodes
* X COMMA X COMMA X
* where X is NUMBER or PERCENTAGE
*/
for (i = 0; i != 3; i++) {
if (!v)
return CSS_COLOR_NONE;
if (v->type == CSS_NODE_NUMBER)
c[i] = atoi(v->data);
else if (v->type == CSS_NODE_PERCENTAGE)
c[i] = atoi(v->data) * 255 / 100;
else
return CSS_COLOR_NONE;
if (c[i] < 0)
c[i] = 0;
if (255 < c[i])
c[i] = 255;
v = v->next;
if (i == 2) {
if (v)
return CSS_COLOR_NONE;
} else {
if (!v || v->type != CSS_NODE_COMMA)
return CSS_COLOR_NONE;
v = v->next;
}
}
return (c[2] << 16) | (c[1] << 8) | c[0];
}
/**
* Parse a uri
*
* \param v node to parse
* \param uri updated to uri, if successful
* \return true on success, false on failure
*/
bool parse_uri(const struct css_node *v, char **uri)
{
bool string = false;
const char *u;
char *t, *url;
url_func_result res;
switch (v->type) {
case CSS_NODE_URI:
for (u = v->data + 4;
*u == ' ' || *u == '\t' || *u == '\r' ||
*u == '\n' || *u == '\f';
u++)
;
if (*u == '\'' || *u == '"') {
string = true;
u++;
}
url = strndup(u, v->data_length - (u - v->data));
if (!url)
return false;
for (t = url + strlen(url) - 2;
*t == ' ' || *t == '\t' || *t == '\r' ||
*t == '\n' || *t == '\f';
t--)
;
if (string)
*t = 0;
else
*(t + 1) = 0;
/* for inline style attributes, the stylesheet
* content is the parent HTML content
*/
if (v->stylesheet->type == CONTENT_HTML)
res = url_join(url, v->stylesheet->data.html.base_url, uri);
else
res = url_join(url, v->stylesheet->url, uri);
free(url);
if (res != URL_FUNC_OK)
return false;
break;
case CSS_NODE_STRING:
url = strndup(v->data, v->data_length);
if (!url)
return false;
if (v->stylesheet->type == CONTENT_HTML)
res = url_join(url, v->stylesheet->data.html.base_url, uri);
else
res = url_join(url, v->stylesheet->url, uri);
free(url);
if (res != URL_FUNC_OK)
return false;
break;
default:
return false;
}
return true;
}
/**
* \name Individual property parsers.
* \{
*/
void parse_background(struct css_style * const s,
const struct css_node * v)
{
colour c = TRANSPARENT, c2;
css_background_image_type bi = CSS_BACKGROUND_IMAGE_NONE, bi2;
char *bi_uri = 0;
css_background_repeat br = CSS_BACKGROUND_REPEAT_REPEAT, br2;
css_background_attachment ba = CSS_BACKGROUND_ATTACHMENT_SCROLL, ba2;
struct css_background_position horz =
{ CSS_BACKGROUND_POSITION_PERCENT, { 0 } };
struct css_background_position vert =
{ CSS_BACKGROUND_POSITION_PERCENT, { 0 } };
struct css_background_position horz2, vert2;
while (v) {
switch (v->type) {
case CSS_NODE_URI:
case CSS_NODE_STRING:
/* background-image */
if (!css_background_image_parse(v, &bi2,
&bi_uri))
goto error;
bi = bi2;
v = v->next;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
case CSS_NODE_PERCENTAGE:
/* background-position */
if (!css_background_position_parse(&v,
&horz2, &vert2))
goto error;
horz = horz2;
vert = vert2;
break;
case CSS_NODE_IDENT:
/* could be background-image: none */
if (v->data_length == 4 &&
strncasecmp(v->data, "none",
4) == 0) {
bi = CSS_BACKGROUND_IMAGE_NONE;
v = v->next;
break;
}
/* background-repeat */
br2 = css_background_repeat_parse(v->data,
v->data_length);
if (br2 != CSS_BACKGROUND_REPEAT_UNKNOWN) {
br = br2;
v = v->next;
break;
}
/* background-attachment */
ba2 = css_background_attachment_parse(v->data,
v->data_length);
if (ba2 != CSS_BACKGROUND_ATTACHMENT_UNKNOWN) {
ba = ba2;
v = v->next;
break;
}
/* background-position */
if (css_background_position_parse(&v,
&horz2, &vert2)) {
horz = horz2;
vert = vert2;
break;
}
/* fall through */
case CSS_NODE_HASH:
case CSS_NODE_FUNCTION:
/* background-color */
c2 = parse_colour(v);
if (c2 != CSS_COLOR_NONE) {
c = c2;
v = v->next;
break;
}
/* fall through */
default:
/* parsing failed */
goto error;
}
}
s->background_color = c;
s->background_image.type = bi;
if (s->background_image.type == CSS_BACKGROUND_IMAGE_URI)
free(s->background_image.uri);
s->background_image.uri = bi_uri;
s->background_repeat = br;
s->background_attachment = ba;
s->background_position.horz = horz;
s->background_position.vert = vert;
return;
error:
free(bi_uri);
}
void parse_background_attachment(struct css_style * const s,
const struct css_node * const v)
{
css_background_attachment z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_background_attachment_parse(v->data, v->data_length);
if (z != CSS_BACKGROUND_ATTACHMENT_UNKNOWN)
s->background_attachment = z;
}
void parse_background_color(struct css_style * const s,
const struct css_node * const v)
{
colour c;
if (v->next)
return;
c = parse_colour(v);
if (c != CSS_COLOR_NONE)
s->background_color = c;
}
void parse_background_image(struct css_style * const s,
const struct css_node * const v)
{
css_background_image_type type;
char *uri = 0;
if (v->next)
return;
if (!css_background_image_parse(v, &type, &uri))
return;
if (s->background_image.type == CSS_BACKGROUND_IMAGE_URI)
free(s->background_image.uri);
s->background_image.type = type;
s->background_image.uri = uri;
}
/**
* Parse a background-image property.
*
* \param node node to parse
* \param type updated to background image type
* \param uri updated to background image uri, if type is
* CSS_BACKGROUND_IMAGE_URI
* \return true on success, false on parse failure
*/
bool css_background_image_parse(const struct css_node *v,
css_background_image_type *type, char **uri)
{
switch (v->type) {
case CSS_NODE_URI:
case CSS_NODE_STRING:
if (!parse_uri(v, uri))
return false;
*type = CSS_BACKGROUND_IMAGE_URI;
break;
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
*type = CSS_BACKGROUND_IMAGE_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "none", 4) == 0)
*type = CSS_BACKGROUND_IMAGE_NONE;
break;
default:
return false;
}
return true;
}
/** An entry in css_background_table. */
struct css_background_entry {
const char *keyword;
unsigned int length;
float value;
bool horizontal;
bool vertical;
};
/** Lookup table for parsing background-postion. */
struct css_background_entry css_background_table[] = {
{ "left", 4, 0, true, false },
{ "right", 5, 100, true, false },
{ "top", 3, 0, false, true },
{ "bottom", 6, 100, false, true },
{ "center", 6, 50, false, false } /* true, true would be more
logical, but this actually simplifies the code */
};
#define CSS_BACKGROUND_TABLE_ENTRIES (sizeof css_background_table / \
sizeof css_background_table[0])
/**
* Lookup a background-position keyword in css_background_table.
*/
struct css_background_entry *css_background_lookup(
const struct css_node *v)
{
unsigned int i;
for (i = 0; i != CSS_BACKGROUND_TABLE_ENTRIES; i++)
if (css_background_table[i].length == v->data_length &&
strncasecmp(v->data,
css_background_table[i].keyword,
css_background_table[i].length) == 0)
break;
if (i == CSS_BACKGROUND_TABLE_ENTRIES)
return 0;
return &css_background_table[i];
}
void parse_background_position(struct css_style * const s,
const struct css_node * v)
{
const struct css_node *node = v;
struct css_background_position horz, vert;
if (v->next && v->next->next)
/* more than two nodes */
return;
if (!css_background_position_parse(&node, &horz, &vert))
return;
if (node)
/* didn't parse all the nodes */
return;
s->background_position.horz = horz;
s->background_position.vert = vert;
}
/**
* Parse a background-position property.
*
* \param node list of nodes, updated to first unused node
* \param horz updated to horizontal background position
* \param vert updated to vertical background position
* \return true on success, false on parse failure
*/
bool css_background_position_parse(const struct css_node **node,
struct css_background_position *horz,
struct css_background_position *vert)
{
const struct css_node *v = *node;
const struct css_node *w = v->next;
const struct css_node *n_temp = 0;
struct css_background_entry *bg = 0, *bg2 = 0, *b_temp = 0;
bool switched = false;
if (v->type == CSS_NODE_IDENT)
bg = css_background_lookup(v);
if (w && w->type == CSS_NODE_IDENT)
bg2 = css_background_lookup(w);
if (!(w && ((w->type == CSS_NODE_IDENT && bg2) ||
w->type == CSS_NODE_PERCENTAGE ||
w->type == CSS_NODE_DIMENSION ||
w->type == CSS_NODE_NUMBER))) {
/* only one value specified */
if (v->type == CSS_NODE_IDENT) {
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7)
== 0) {
horz->pos = vert->pos =
CSS_BACKGROUND_POSITION_INHERIT;
return false;
}
if (!bg)
return false;
horz->pos = vert->pos = CSS_BACKGROUND_POSITION_PERCENT;
horz->value.percent = bg->horizontal ? bg->value : 50;
vert->value.percent = bg->vertical ? bg->value : 50;
}
else if (v->type == CSS_NODE_PERCENTAGE) {
horz->pos = vert->pos = CSS_BACKGROUND_POSITION_PERCENT;
horz->value.percent = atof(v->data);
vert->value.percent = 50.0;
}
else if ((v->type == CSS_NODE_DIMENSION) ||
(v->type == CSS_NODE_NUMBER)) {
if (parse_length(&horz->value.
length, v, false) == 0) {
horz->pos = CSS_BACKGROUND_POSITION_LENGTH;
vert->pos = CSS_BACKGROUND_POSITION_PERCENT;
vert->value.percent = 50.0;
}
}
*node = w;
return true;
}
/* two values specified */
if (v->type == CSS_NODE_IDENT && w->type == CSS_NODE_IDENT) {
/* both keywords */
if (!bg || !bg2)
return false;
if ((bg->horizontal && bg2->horizontal) ||
(bg->vertical && bg2->vertical))
return false;
horz->pos = vert->pos = CSS_BACKGROUND_POSITION_PERCENT;
horz->value.percent = vert->value.percent = 50;
if (bg->horizontal)
horz->value.percent = bg->value;
else if (bg2->horizontal)
horz->value.percent = bg2->value;
if (bg->vertical)
vert->value.percent = bg->value;
else if (bg2->vertical)
vert->value.percent = bg2->value;
*node = w->next;
return true;
}
/* reverse specifiers such that idents are places in h, v order */
if ((v->type == CSS_NODE_IDENT && bg && bg->vertical) ||
(w->type == CSS_NODE_IDENT && bg2 && bg2->horizontal)) {
n_temp = v; v = w; w = n_temp;
b_temp = bg; bg = bg2; bg2 = b_temp;
switched = true;
}
if (v->type == CSS_NODE_IDENT) { /* horizontal value */
if (!bg || bg->vertical)
return false;
}
if (w->type == CSS_NODE_IDENT) { /* vertical value */
if (!bg2 || bg2->horizontal)
return false;
}
if (v->type == CSS_NODE_IDENT) { /* horizontal value */
horz->pos = CSS_BACKGROUND_POSITION_PERCENT;
horz->value.percent = bg->value;
} else if (v->type == CSS_NODE_PERCENTAGE) {
horz->pos = CSS_BACKGROUND_POSITION_PERCENT;
horz->value.percent = atof(v->data);
} else if ((v->type == CSS_NODE_DIMENSION) ||
(v->type == CSS_NODE_NUMBER)) {
if (parse_length(&horz->value.length,
v, false) == 0)
horz->pos = CSS_BACKGROUND_POSITION_LENGTH;
}
if (w->type == CSS_NODE_IDENT) { /* vertical value */
vert->pos = CSS_BACKGROUND_POSITION_PERCENT;
vert->value.percent = bg2->value;
} else if (w->type == CSS_NODE_PERCENTAGE) {
vert->pos = CSS_BACKGROUND_POSITION_PERCENT;
vert->value.percent = atof(w->data);
} else if ((w->type == CSS_NODE_DIMENSION) ||
(w->type == CSS_NODE_NUMBER)) {
if (parse_length(&vert->value.length,
w, false) == 0)
vert->pos = CSS_BACKGROUND_POSITION_LENGTH;
}
/* undo any switching we did */
if (switched) {
n_temp = v; v = w; w = n_temp;
b_temp = bg; bg = bg2; bg2 = b_temp;
}
*node = w->next;
return true;
}
void parse_background_repeat(struct css_style * const s,
const struct css_node * const v)
{
css_background_repeat z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_background_repeat_parse(v->data, v->data_length);
if (z != CSS_BACKGROUND_REPEAT_UNKNOWN)
s->background_repeat = z;
}
void parse_border_width(struct css_style * const s,
const struct css_node * const v)
{
unsigned int count = 0;
const struct css_node *w;
for (w = v; w; w = w->next, count++)
if (!((w->type == CSS_NODE_IDENT && (
(w->data_length == 7 &&
strncasecmp(w->data, "inherit", 7) == 0) ||
(w->data_length == 4 &&
strncasecmp(w->data, "thin", 4) == 0) ||
(w->data_length == 6 &&
strncasecmp(w->data, "medium", 6) == 0) ||
(w->data_length == 5 &&
strncasecmp(w->data, "thick", 5) == 0))) ||
(w->type == CSS_NODE_DIMENSION) ||
(w->type == CSS_NODE_NUMBER)))
return;
w = v;
switch (count) {
case 1: /* one value: applies to all sides */
parse_border_width_side(s, w, TOP);
parse_border_width_side(s, w, RIGHT);
parse_border_width_side(s, w, BOTTOM);
parse_border_width_side(s, w, LEFT);
break;
case 2: /* (top and bottom), (left and right) */
parse_border_width_side(s, w, TOP);
parse_border_width_side(s, w, BOTTOM);
w = w->next;
parse_border_width_side(s, w, RIGHT);
parse_border_width_side(s, w, LEFT);
break;
case 3: /* top, (left and right), bottom */
parse_border_width_side(s, w, TOP);
w = w->next;
parse_border_width_side(s, w, RIGHT);
parse_border_width_side(s, w, LEFT);
w = w->next;
parse_border_width_side(s, w, BOTTOM);
break;
case 4: /* top, right, bottom, left */
parse_border_width_side(s, w, TOP);
w = w->next;
parse_border_width_side(s, w, RIGHT);
w = w->next;
parse_border_width_side(s, w, BOTTOM);
w = w->next;
parse_border_width_side(s, w, LEFT);
break;
}
}
#define PARSE_BORDER_WIDTH(side, z) \
void parse_border_ ## side ## _width(struct css_style * const s, \
const struct css_node * const v) \
{ \
if (v->next != 0) \
return; \
parse_border_width_side(s, v, z); \
}
PARSE_BORDER_WIDTH(top, TOP)
PARSE_BORDER_WIDTH(right, RIGHT)
PARSE_BORDER_WIDTH(bottom, BOTTOM)
PARSE_BORDER_WIDTH(left, LEFT)
void parse_border_width_side(struct css_style * const s,
const struct css_node * const v, unsigned int i)
{
if (v->type == CSS_NODE_IDENT) {
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->border[i].width.width = CSS_BORDER_WIDTH_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "thin", 4) == 0) {
s->border[i].width.width = CSS_BORDER_WIDTH_LENGTH;
s->border[i].width.value.value = 1;
s->border[i].width.value.unit = CSS_UNIT_PX;
} else if (v->data_length == 6 &&
strncasecmp(v->data, "medium", 6) == 0) {
s->border[i].width.width = CSS_BORDER_WIDTH_LENGTH;
s->border[i].width.value.value = 2;
s->border[i].width.value.unit = CSS_UNIT_PX;
} else if (v->data_length == 5 &&
strncasecmp(v->data, "thick", 5) == 0) {
s->border[i].width.width = CSS_BORDER_WIDTH_LENGTH;
s->border[i].width.value.value = 4;
s->border[i].width.value.unit = CSS_UNIT_PX;
}
} else if ((v->type == CSS_NODE_DIMENSION ||
v->type == CSS_NODE_NUMBER) &&
parse_length(&s->border[i].width.value, v, true) == 0)
s->border[i].width.width = CSS_BORDER_WIDTH_LENGTH;
}
void parse_border_color(struct css_style * const s,
const struct css_node * const v)
{
unsigned int count = 0;
const struct css_node *w;
for (w = v; w; w = w->next, count++)
if (!(w->type == CSS_NODE_HASH ||
w->type == CSS_NODE_FUNCTION ||
w->type == CSS_NODE_IDENT))
return;
w = v;
switch (count) {
case 1: /* one value: applies to all sides */
parse_border_color_side(s, w, TOP);
parse_border_color_side(s, w, RIGHT);
parse_border_color_side(s, w, BOTTOM);
parse_border_color_side(s, w, LEFT);
break;
case 2: /* (top and bottom), (left and right) */
parse_border_color_side(s, w, TOP);
parse_border_color_side(s, w, BOTTOM);
w = w->next;
parse_border_color_side(s, w, RIGHT);
parse_border_color_side(s, w, LEFT);
break;
case 3: /* top, (left and right), bottom */
parse_border_color_side(s, w, TOP);
w = w->next;
parse_border_color_side(s, w, RIGHT);
parse_border_color_side(s, w, LEFT);
w = w->next;
parse_border_color_side(s, w, BOTTOM);
break;
case 4: /* top, right, bottom, left */
parse_border_color_side(s, w, TOP);
w = w->next;
parse_border_color_side(s, w, RIGHT);
w = w->next;
parse_border_color_side(s, w, BOTTOM);
w = w->next;
parse_border_color_side(s, w, LEFT);
break;
}
}
#define PARSE_BORDER_COLOR(side, z) \
void parse_border_ ## side ## _color(struct css_style * const s, \
const struct css_node * const v) \
{ \
if (v->next != 0) \
return; \
parse_border_color_side(s, v, z); \
}
PARSE_BORDER_COLOR(top, TOP)
PARSE_BORDER_COLOR(right, RIGHT)
PARSE_BORDER_COLOR(bottom, BOTTOM)
PARSE_BORDER_COLOR(left, LEFT)
void parse_border_color_side(struct css_style * const s,
const struct css_node * const v, unsigned int i)
{
colour c = parse_colour(v);
if (c != CSS_COLOR_NONE)
s->border[i].color = c;
}
void parse_border_style(struct css_style * const s,
const struct css_node * const v)
{
unsigned int count = 0;
const struct css_node *w;
for (w = v; w; w = w->next, count++)
if (w->type != CSS_NODE_IDENT)
return;
w = v;
switch (count) {
case 1: /* one value: applies to all sides */
parse_border_style_side(s, w, TOP);
parse_border_style_side(s, w, RIGHT);
parse_border_style_side(s, w, BOTTOM);
parse_border_style_side(s, w, LEFT);
break;
case 2: /* (top and bottom), (left and right) */
parse_border_style_side(s, w, TOP);
parse_border_style_side(s, w, BOTTOM);
w = w->next;
parse_border_style_side(s, w, RIGHT);
parse_border_style_side(s, w, LEFT);
break;
case 3: /* top, (left and right), bottom */
parse_border_style_side(s, w, TOP);
w = w->next;
parse_border_style_side(s, w, RIGHT);
parse_border_style_side(s, w, LEFT);
w = w->next;
parse_border_style_side(s, w, BOTTOM);
break;
case 4: /* top, right, bottom, left */
parse_border_style_side(s, w, TOP);
w = w->next;
parse_border_style_side(s, w, RIGHT);
w = w->next;
parse_border_style_side(s, w, BOTTOM);
w = w->next;
parse_border_style_side(s, w, LEFT);
break;
}
}
#define PARSE_BORDER_STYLE(side, z) \
void parse_border_ ## side ## _style(struct css_style * const s, \
const struct css_node * const v) \
{ \
if (v->next != 0 || v->type != CSS_NODE_IDENT) \
return; \
parse_border_style_side(s, v, z); \
}
PARSE_BORDER_STYLE(top, TOP)
PARSE_BORDER_STYLE(right, RIGHT)
PARSE_BORDER_STYLE(bottom, BOTTOM)
PARSE_BORDER_STYLE(left, LEFT)
void parse_border_style_side(struct css_style * const s,
const struct css_node * const v, unsigned int i)
{
css_border_style z = css_border_style_parse(v->data, v->data_length);
if (z != CSS_BORDER_STYLE_UNKNOWN)
s->border[i].style = z;
}
void parse_border(struct css_style * const s,
const struct css_node * const v)
{
parse_border_side(s, v, TOP);
parse_border_side(s, v, RIGHT);
parse_border_side(s, v, BOTTOM);
parse_border_side(s, v, LEFT);
}
#define PARSE_BORDER(side, z) \
void parse_border_ ## side(struct css_style * const s, \
const struct css_node * const v) \
{ \
parse_border_side(s, v, z); \
}
PARSE_BORDER(top, TOP)
PARSE_BORDER(right, RIGHT)
PARSE_BORDER(bottom, BOTTOM)
PARSE_BORDER(left, LEFT)
void parse_border_side(struct css_style * const s,
const struct css_node *v, unsigned int i)
{
colour c;
css_border_style z;
if (!v->next && v->type == CSS_NODE_IDENT &&
v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0) {
s->border[i].color = CSS_COLOR_INHERIT;
s->border[i].width.width = CSS_BORDER_WIDTH_INHERIT;
s->border[i].style = CSS_BORDER_STYLE_INHERIT;
return;
}
for (; v; v = v->next) {
c = parse_colour(v);
if (c != CSS_COLOR_NONE) {
s->border[i].color = c;
continue;
}
if (v->type == CSS_NODE_IDENT) {
z = css_border_style_parse(v->data, v->data_length);
if (z != CSS_BORDER_STYLE_UNKNOWN) {
s->border[i].style = z;
continue;
}
}
parse_border_width_side(s, v, i);
}
}
void parse_border_collapse(struct css_style * const s, const struct css_node * v)
{
css_border_collapse z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_border_collapse_parse(v->data, v->data_length);
if (z != CSS_BORDER_COLLAPSE_UNKNOWN)
s->border_collapse = z;
}
void parse_border_spacing(struct css_style * const s, const struct css_node * v)
{
if (v->next && v->next->next)
/* more than two nodes */
return;
if (!v->next) {
/* one node */
if (v->type == CSS_NODE_IDENT && v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->border_spacing.border_spacing =
CSS_BORDER_SPACING_INHERIT;
else if (v->type == CSS_NODE_DIMENSION ||
v->type == CSS_NODE_NUMBER) {
if (parse_length(&s->border_spacing.horz,
v, true) == 0 &&
parse_length(&s->border_spacing.vert,
v, true) == 0)
s->border_spacing.border_spacing =
CSS_BORDER_SPACING_LENGTH;
}
} else {
/* two nodes */
if ((v->type == CSS_NODE_DIMENSION ||
v->type == CSS_NODE_NUMBER) &&
(v->next->type == CSS_NODE_DIMENSION ||
v->next->type == CSS_NODE_NUMBER)) {
if (parse_length(&s->border_spacing.horz,
v, true) == 0 &&
parse_length(&s->border_spacing.vert,
v->next, true) == 0)
s->border_spacing.border_spacing =
CSS_BORDER_SPACING_LENGTH;
}
}
}
void parse_caption_side(struct css_style * const s, const struct css_node * v)
{
css_caption_side z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_caption_side_parse(v->data, v->data_length);
if (z != CSS_CAPTION_SIDE_UNKNOWN)
s->caption_side = z;
}
void parse_clear(struct css_style * const s, const struct css_node * const v)
{
css_clear z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_clear_parse(v->data, v->data_length);
if (z != CSS_CLEAR_UNKNOWN)
s->clear = z;
}
void parse_clip(struct css_style * const s, const struct css_node * v)
{
int i;
struct css_node *t;
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->clip.clip = CSS_CLIP_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "auto", 4) == 0)
s->clip.clip = CSS_CLIP_AUTO;
break;
case CSS_NODE_FUNCTION:
/* must be rect(X,X,X,X) */
if (v->data_length == 5 &&
strncasecmp(v->data, "rect", 4) == 0) {
struct {
enum { CSS_CLIP_RECT_AUTO,
CSS_CLIP_RECT_LENGTH } rect;
struct css_length value;
} rect[4];
t = v->value;
if (!t)
return;
for (i = 0; i != 4; i++) {
switch (t->type) {
case CSS_NODE_IDENT:
if (t->data_length == 4 &&
strncasecmp(t->data, "auto", 4) == 0) {
rect[i].rect = CSS_CLIP_AUTO;
}
else
return;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (parse_length(&rect[i].value,
t, false) != 0)
return;
rect[i].rect = CSS_CLIP_RECT_LENGTH;
break;
default:
return;
}
/* move to comma or end */
t = t->next;
if (i == 3 && t)
/* excess arguments - ignore rule */
return;
else {
if (!t || t->type != CSS_NODE_COMMA)
/* insufficient arguments or
* no comma - ignore rule */
return;
}
/* move to next argument */
t = t->next;
}
/* If we reach here, rule is valid, so apply to s */
for (i = 0; i != 4; i++) {
s->clip.rect[i].rect = rect[i].rect;
s->clip.rect[i].value.value =
rect[i].value.value;
s->clip.rect[i].value.unit =
rect[i].value.unit;
}
s->clip.clip = CSS_CLIP_RECT;
}
break;
default:
break;
}
}
void parse_color(struct css_style * const s, const struct css_node * const v)
{
colour c;
if (v->next)
return;
c = parse_colour(v);
if (c != CSS_COLOR_NONE)
s->color = c;
}
void parse_content(struct css_style * const s, const struct css_node * v)
{
struct css_content *new_content = NULL;
struct css_content *content;
struct css_node *t;
bool first = true;
for (; v; v = v->next) {
switch (v->type) {
case CSS_NODE_STRING:
content = parse_content_new(&new_content, CSS_CONTENT_STRING);
if (!content)
return;
content->data.string = strndup(v->data, v->data_length);
if (!content->data.string) {
css_deep_free_content(new_content);
return;
}
break;
case CSS_NODE_URI:
content = parse_content_new(&new_content, CSS_CONTENT_URI);
if (!content)
return;
if (!parse_uri(v, &content->data.uri)) {
css_deep_free_content(new_content);
return;
}
break;
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0) {
if ((!first) || (v->next))
return;
css_deep_free_content(s->content.content);
s->content.content = NULL;
s->content.type = CSS_CONTENT_INHERIT;
return;
} else if (v->data_length == 6 &&
strncasecmp(v->data, "normal", 6) == 0) {
if ((!first) || (v->next))
return;
css_deep_free_content(s->content.content);
s->content.content = NULL;
s->content.type = CSS_CONTENT_NORMAL;
return;
} else if (v->data_length == 10 &&
strncasecmp(v->data, "open-quote", 10) == 0) {
if (!parse_content_new(&new_content, CSS_CONTENT_OPEN_QUOTE))
return;
} else if (v->data_length == 11 &&
strncasecmp(v->data, "close-quote", 11) == 0) {
if (!parse_content_new(&new_content, CSS_CONTENT_CLOSE_QUOTE))
return;
} else if (v->data_length == 13 &&
strncasecmp(v->data, "no-open-quote", 13) == 0) {
if (!parse_content_new(&new_content, CSS_CONTENT_NO_OPEN_QUOTE))
return;
} else if (v->data_length == 14 &&
strncasecmp(v->data, "no-close-quote", 14) == 0) {
if (!parse_content_new(&new_content, CSS_CONTENT_NO_CLOSE_QUOTE))
return;
} else {
css_deep_free_content(new_content);
return;
}
break;
case CSS_NODE_FUNCTION:
if (v->data_length == 5 &&
strncasecmp(v->data, "attr", 4) == 0) {
content = parse_content_new(&new_content, CSS_CONTENT_URI);
if (!content)
return;
t = v->value;
if ((t->type == CSS_NODE_STRING) && (!t->next)) {
content->data.string = strndup(t->data, t->data_length);
if (!content->data.string) {
css_deep_free_content(new_content);
return;
}
} else {
css_deep_free_content(new_content);
return;
}
} else if (v->data_length == 8 &&
strncasecmp(v->data, "counter", 7) == 0) {
if (!parse_content_counter(&new_content, v->value, false))
return;
} else if (v->data_length == 9 &&
strncasecmp(v->data, "counters", 8) == 0) {
if (!parse_content_counter(&new_content, v->value, true))
return;
} else {
css_deep_free_content(new_content);
return;
}
default:
css_deep_free_content(new_content);
return;
}
first = false;
}
if (new_content) {
css_deep_free_content(s->content.content);
s->content.type = CSS_CONTENT_INTERPRET;
s->content.content = new_content;
}
}
struct css_content *parse_content_new(struct css_content **current, css_content_type_generated generated) {
struct css_content *content;
struct css_content *link;
content = (struct css_content *)calloc(1, sizeof(struct css_content));
if (!content) {
css_deep_free_content(*current);
return NULL;
}
content->type = generated;
if (!*current) {
*current = content;
} else {
for (link = *current; link->next; link = link->next);
link->next = content;
}
return content;
}
bool parse_content_counter(struct css_content **current, struct css_node *t, bool counters) {
struct css_content *content;
css_list_style_type z;
content = parse_content_new(current, CSS_CONTENT_COUNTER);
if ((!content) || (t->type != CSS_NODE_IDENT))
return false;
content->data.counter.name = strndup(t->data, t->data_length);
content->data.counter.style = CSS_LIST_STYLE_TYPE_DECIMAL;
t = t->next;
if (counters) {
if ((!t) || (t->type != CSS_NODE_STRING)) {
css_deep_free_content(*current);
return false;
}
content->data.counter.separator = strndup(t->data, t->data_length);
t = t->next;
}
if (!t)
return true;
if ((t->type != CSS_NODE_IDENT) || (t->next)) {
css_deep_free_content(*current);
return false;
}
z = css_list_style_type_parse(t->data, t->data_length);
if (z != CSS_LIST_STYLE_TYPE_UNKNOWN)
content->data.counter.style = z;
return true;
}
void parse_counter_reset(struct css_style * const s, const struct css_node * v) {
struct css_counter_control *counter = NULL;
if (!parse_counter_control_data(&counter, v, 0))
return;
if (counter) {
css_deep_free_counter_control(s->counter_reset.data);
s->counter_reset.type = CSS_COUNTER_RESET_INTERPRET;
s->counter_reset.data = counter;
}
}
void parse_counter_increment(struct css_style * const s, const struct css_node * v) {
struct css_counter_control *counter = NULL;
if (!parse_counter_control_data(&counter, v, 1))
return;
if (counter) {
css_deep_free_counter_control(s->counter_increment.data);
s->counter_increment.type = CSS_COUNTER_INCREMENT_INTERPRET;
s->counter_increment.data = counter;
}
}
bool parse_counter_control_data(struct css_counter_control **current, const struct css_node * v, int empty) {
struct css_counter_control *open = NULL;
for (; v; v = v->next) {
switch (v->type) {
case CSS_NODE_IDENT:
open = parse_counter_control_new(current);
if (!open)
return false;
open->name = strndup(v->data, v->data_length);
open->value = empty;
if (!open->name) {
css_deep_free_counter_control(*current);
return false;
}
break;
case CSS_NODE_NUMBER:
if (!open) {
css_deep_free_counter_control(*current);
return false;
}
open->value = atoi(v->data);
open = NULL;
break;
default:
css_deep_free_counter_control(*current);
return false;
}
}
return true;
}
struct css_counter_control *parse_counter_control_new(struct css_counter_control **current) {
struct css_counter_control *counter;
struct css_counter_control *link;
counter = (struct css_counter_control *)calloc(1, sizeof(struct css_counter_control));
if (!counter) {
css_deep_free_counter_control(*current);
return NULL;
}
if (!*current) {
*current = counter;
} else {
for (link = *current; link->next; link = link->next);
link->next = counter;
}
return counter;
}
void parse_cursor(struct css_style * const s, const struct css_node * v)
{
css_cursor z;
for (; v; v = v->next) {
switch (v->type) {
case CSS_NODE_IDENT:
z = css_cursor_parse(v->data, v->data_length);
if (z != CSS_CURSOR_UNKNOWN) {
s->cursor = z;
return;
}
break;
default:
break;
}
}
}
void parse_direction(struct css_style * const s, const struct css_node * v)
{
css_direction z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_direction_parse(v->data, v->data_length);
if (z != CSS_DIRECTION_UNKNOWN)
s->direction = z;
}
void parse_display(struct css_style * const s, const struct css_node * const v)
{
css_display z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_display_parse(v->data, v->data_length);
if (z != CSS_DISPLAY_UNKNOWN)
s->display = z;
}
void parse_empty_cells(struct css_style * const s, const struct css_node * v)
{
css_empty_cells z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_empty_cells_parse(v->data, v->data_length);
if (z != CSS_EMPTY_CELLS_UNKNOWN)
s->empty_cells = z;
}
void parse_float(struct css_style * const s, const struct css_node * const v)
{
css_float z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_float_parse(v->data, v->data_length);
if (z != CSS_FLOAT_UNKNOWN)
s->float_ = z;
}
void parse_font(struct css_style * const s, const struct css_node * v)
{
css_font_family ff;
css_font_style fs;
css_font_variant fv;
css_font_weight fw;
s->font_family = CSS_FONT_FAMILY_SANS_SERIF;
s->font_style = CSS_FONT_STYLE_NORMAL;
s->font_weight = CSS_FONT_WEIGHT_NORMAL;
s->line_height.size = CSS_LINE_HEIGHT_ABSOLUTE;
s->line_height.value.absolute = 1.3;
for (; v; v = v->next) {
switch (v->type) {
case CSS_NODE_IDENT:
/* font-family */
ff = css_font_family_parse(v->data,
v->data_length);
if (ff != CSS_FONT_FAMILY_UNKNOWN) {
s->font_family = ff;
break;
}
/* font-style, font-variant, or font-weight */
fs = css_font_style_parse(v->data,
v->data_length);
if (fs != CSS_FONT_STYLE_UNKNOWN) {
s->font_style = fs;
break;
}
fv = css_font_variant_parse(v->data,
v->data_length);
if (fv != CSS_FONT_VARIANT_UNKNOWN) {
s->font_variant = fv;
break;
}
fw = css_font_weight_parse(v->data,
v->data_length);
if (fw != CSS_FONT_WEIGHT_UNKNOWN) {
s->font_weight = fw;
break;
}
case CSS_NODE_PERCENTAGE:
case CSS_NODE_DIMENSION:
parse_font_size(s, v);
break;
case CSS_NODE_DELIM:
if (v->data[0] == '/' && v->data_length == 1 &&
v->next) {
v = v->next;
parse_line_height(s, v);
}
break;
default:
break;
}
}
}
void parse_font_family(struct css_style * const s, const struct css_node * v)
{
css_font_family z;
for (; v; v = v->next) {
switch (v->type) {
case CSS_NODE_IDENT:
z = css_font_family_parse(v->data,
v->data_length);
if (z != CSS_FONT_FAMILY_UNKNOWN) {
s->font_family = z;
return;
}
break;
default:
break;
}
}
}
void parse_font_size(struct css_style * const s, const struct css_node * const v)
{
char font_size_name[10];
struct css_font_size_entry *fs;
switch (v->type) {
case CSS_NODE_IDENT:
if (9 < v->data_length)
break;
strncpy(font_size_name, v->data, v->data_length);
font_size_name[v->data_length] = 0;
fs = bsearch(font_size_name, css_font_size_table,
sizeof css_font_size_table /
sizeof css_font_size_table[0],
sizeof css_font_size_table[0],
(int (*)(const void *, const void *))
strcasecmp);
if (fs != 0) {
s->font_size.size = CSS_FONT_SIZE_LENGTH;
s->font_size.value.length.unit = CSS_UNIT_PT;
s->font_size.value.length.value = fs->size *
option_font_size / 10;
} else if (v->data_length == 6 &&
strncasecmp(v->data, "larger", 6) == 0) {
s->font_size.size = CSS_FONT_SIZE_PERCENT;
s->font_size.value.percent = SIZE_FACTOR * 100;
} else if (v->data_length == 7 &&
strncasecmp(v->data, "smaller", 7) == 0) {
s->font_size.size = CSS_FONT_SIZE_PERCENT;
s->font_size.value.percent = 1 / SIZE_FACTOR * 100;
}
break;
case CSS_NODE_PERCENTAGE:
s->font_size.size = CSS_FONT_SIZE_PERCENT;
s->font_size.value.percent = atof(v->data);
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (parse_length(&s->font_size.value.length, v, true) == 0)
s->font_size.size = CSS_FONT_SIZE_LENGTH;
break;
default:
break;
}
}
void parse_font_style(struct css_style * const s, const struct css_node * const v)
{
css_font_style z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_font_style_parse(v->data, v->data_length);
if (z != CSS_FONT_STYLE_UNKNOWN)
s->font_style = z;
}
void parse_font_variant(struct css_style * const s, const struct css_node * const v)
{
css_font_variant z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_font_variant_parse(v->data, v->data_length);
if (z != CSS_FONT_VARIANT_UNKNOWN)
s->font_variant = z;
}
void parse_font_weight(struct css_style * const s, const struct css_node * const v)
{
css_font_weight z;
if ((v->type != CSS_NODE_IDENT && v->type != CSS_NODE_NUMBER) || v->next != 0)
return;
z = css_font_weight_parse(v->data, v->data_length);
if (z != CSS_FONT_WEIGHT_UNKNOWN)
s->font_weight = z;
}
void parse_height(struct css_style * const s, const struct css_node * const v)
{
if (v->type == CSS_NODE_IDENT && v->data_length == 4 &&
strncasecmp(v->data, "auto", 4) == 0)
s->height.height = CSS_HEIGHT_AUTO;
else if ((v->type == CSS_NODE_DIMENSION || v->type == CSS_NODE_NUMBER) &&
parse_length(&s->height.length, v, true) == 0)
s->height.height = CSS_HEIGHT_LENGTH;
}
void parse_letter_spacing(struct css_style * const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->letter_spacing.letter_spacing = CSS_LETTER_SPACING_INHERIT;
else if (v->data_length == 6 &&
strncasecmp(v->data, "normal", 6) == 0)
s->letter_spacing.letter_spacing = CSS_LETTER_SPACING_NORMAL;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (parse_length(&s->letter_spacing.length, v, false) == 0)
s->letter_spacing.letter_spacing = CSS_LETTER_SPACING_LENGTH;
break;
default:
break;
}
}
void parse_line_height(struct css_style * const s, const struct css_node * const v)
{
if (v->type == CSS_NODE_IDENT && v->data_length == 6 &&
strncasecmp(v->data, "normal", 6) == 0) {
s->line_height.size = CSS_LINE_HEIGHT_ABSOLUTE;
s->line_height.value.absolute = 1.3;
} else if (v->type == CSS_NODE_PERCENTAGE) {
s->line_height.size = CSS_LINE_HEIGHT_PERCENT;
s->line_height.value.percent = atof(v->data);
} else if (v->type == CSS_NODE_DIMENSION &&
parse_length(&s->line_height.value.length, v, true) == 0) {
s->line_height.size = CSS_LINE_HEIGHT_LENGTH;
} else if (v->type == CSS_NODE_NUMBER) {
s->line_height.size = CSS_LINE_HEIGHT_ABSOLUTE;
s->line_height.value.absolute = atof(v->data);
}
}
void parse_list_style(struct css_style * const s, const struct css_node * v)
{
css_list_style_type t = CSS_LIST_STYLE_TYPE_DISC, t2;
css_list_style_position p = CSS_LIST_STYLE_POSITION_OUTSIDE, p2;
css_list_style_image_type i = CSS_LIST_STYLE_IMAGE_NONE, i2;
char *lsi_uri = 0;
while (v) {
switch (v->type) {
case CSS_NODE_IDENT:
t2 = css_list_style_type_parse(v->data, v->data_length);
if (t2 != CSS_LIST_STYLE_TYPE_UNKNOWN) {
t = t2;
v = v->next;
break;
}
p2 = css_list_style_position_parse(v->data, v->data_length);
if (p2 != CSS_LIST_STYLE_POSITION_UNKNOWN) {
p = p2;
v = v->next;
break;
}
/* drop through */
case CSS_NODE_STRING:
case CSS_NODE_URI:
if (!css_list_style_image_parse(v, &i2, &lsi_uri))
return;
i = i2;
v = v->next;
break;
default:
return;
}
}
s->list_style_type = t;
s->list_style_position = p;
s->list_style_image.type = i;
s->list_style_image.uri = lsi_uri;
}
void parse_list_style_image(struct css_style * const s, const struct css_node * v)
{
css_list_style_image_type type;
char *uri;
if (v->next != 0)
return;
if (!css_list_style_image_parse(v, &type, &uri))
return;
if (s->list_style_image.type == CSS_LIST_STYLE_IMAGE_URI)
free(s->list_style_image.uri);
s->list_style_image.type = type;
s->list_style_image.uri = uri;
}
/**
* Parse a list-style-image property.
*
* \param node node to parse
* \param type updated to list-style-image type
* \param uri updated to image uri, if type is
* CSS_LIST_STYLE_IMAGE_URI
* \return true on success, false on parse failure
*/
bool css_list_style_image_parse(const struct css_node *v,
css_list_style_image_type *type, char **uri)
{
switch (v->type) {
case CSS_NODE_URI:
case CSS_NODE_STRING:
if (!parse_uri(v, uri))
return false;
*type = CSS_LIST_STYLE_IMAGE_URI;
break;
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
*type = CSS_LIST_STYLE_IMAGE_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "none", 4) == 0)
*type = CSS_LIST_STYLE_IMAGE_NONE;
break;
default:
return false;
}
return true;
}
void parse_list_style_position(struct css_style * const s, const struct css_node * v)
{
css_list_style_position z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_list_style_position_parse(v->data, v->data_length);
if (z != CSS_LIST_STYLE_POSITION_UNKNOWN)
s->list_style_position = z;
}
void parse_list_style_type(struct css_style * const s, const struct css_node * v)
{
css_list_style_type z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_list_style_type_parse(v->data, v->data_length);
if (z != CSS_LIST_STYLE_TYPE_UNKNOWN)
s->list_style_type = z;
}
void parse_margin(struct css_style * const s, const struct css_node * const v)
{
unsigned int count = 0;
const struct css_node *w;
for (w = v; w; w = w->next, count++)
if (!((w->type == CSS_NODE_IDENT && (
(w->data_length == 7 &&
strncasecmp(w->data, "inherit", 7) == 0) ||
(w->data_length == 4 &&
strncasecmp(w->data, "auto", 4) == 0))) ||
(w->type == CSS_NODE_PERCENTAGE) ||
(w->type == CSS_NODE_DIMENSION) ||
(w->type == CSS_NODE_NUMBER)))
return;
w = v;
switch (count) {
case 1: /* one value: applies to all sides */
parse_margin_side(s, w, TOP);
parse_margin_side(s, w, RIGHT);
parse_margin_side(s, w, BOTTOM);
parse_margin_side(s, w, LEFT);
break;
case 2: /* (top and bottom), (left and right) */
parse_margin_side(s, w, TOP);
parse_margin_side(s, w, BOTTOM);
w = w->next;
parse_margin_side(s, w, RIGHT);
parse_margin_side(s, w, LEFT);
break;
case 3: /* top, (left and right), bottom */
parse_margin_side(s, w, TOP);
w = w->next;
parse_margin_side(s, w, RIGHT);
parse_margin_side(s, w, LEFT);
w = w->next;
parse_margin_side(s, w, BOTTOM);
break;
case 4: /* top, right, bottom, left */
parse_margin_side(s, w, TOP);
w = w->next;
parse_margin_side(s, w, RIGHT);
w = w->next;
parse_margin_side(s, w, BOTTOM);
w = w->next;
parse_margin_side(s, w, LEFT);
break;
}
}
#define PARSE_MARGIN_(side, z) \
void parse_margin_ ## side(struct css_style * const s, \
const struct css_node * const v) \
{ \
if (v->next != 0) \
return; \
parse_margin_side(s, v, z); \
}
PARSE_MARGIN_(top, TOP)
PARSE_MARGIN_(right, RIGHT)
PARSE_MARGIN_(bottom, BOTTOM)
PARSE_MARGIN_(left, LEFT)
void parse_margin_side(struct css_style * const s, const struct css_node * const v,
unsigned int i)
{
if (v->type == CSS_NODE_IDENT && v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->margin[i].margin = CSS_MARGIN_INHERIT;
else if (v->type == CSS_NODE_IDENT && v->data_length == 4 &&
strncasecmp(v->data, "auto", 4) == 0)
s->margin[i].margin = CSS_MARGIN_AUTO;
else if (v->type == CSS_NODE_PERCENTAGE) {
s->margin[i].margin = CSS_MARGIN_PERCENT;
s->margin[i].value.percent = atof(v->data);
} else if ((v->type == CSS_NODE_DIMENSION || v->type == CSS_NODE_NUMBER) &&
parse_length(&s->margin[i].value.length, v, false) == 0) {
s->margin[i].margin = CSS_MARGIN_LENGTH;
}
}
void parse_max_height(struct css_style *const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->max_height.max_height = CSS_MAX_HEIGHT_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "none", 4) == 0)
s->max_height.max_height = CSS_MAX_HEIGHT_NONE;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (!parse_length(&s->max_height.value.length, v, true))
s->max_height.max_height = CSS_MAX_HEIGHT_LENGTH;
break;
case CSS_NODE_PERCENTAGE:
s->max_height.value.percent = atof(v->data);
s->max_height.max_height = CSS_MAX_HEIGHT_PERCENT;
break;
default:
break;
}
}
void parse_max_width(struct css_style *const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->max_width.max_width = CSS_MAX_WIDTH_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "none", 4) == 0)
s->max_width.max_width = CSS_MAX_WIDTH_NONE;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (!parse_length(&s->max_width.value.length, v, true))
s->max_width.max_width = CSS_MAX_WIDTH_LENGTH;
break;
case CSS_NODE_PERCENTAGE:
s->max_width.value.percent = atof(v->data);
s->max_width.max_width = CSS_MAX_WIDTH_PERCENT;
break;
default:
break;
}
}
void parse_min_height(struct css_style *const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->min_height.min_height = CSS_MIN_HEIGHT_INHERIT;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (!parse_length(&s->min_height.value.length, v, true))
s->min_height.min_height = CSS_MIN_HEIGHT_LENGTH;
break;
case CSS_NODE_PERCENTAGE:
s->min_height.value.percent = atof(v->data);
s->min_height.min_height = CSS_MIN_HEIGHT_PERCENT;
break;
default:
break;
}
}
void parse_min_width(struct css_style *const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->min_width.min_width = CSS_MIN_WIDTH_INHERIT;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (!parse_length(&s->min_width.value.length, v, true))
s->min_width.min_width = CSS_MIN_WIDTH_LENGTH;
break;
case CSS_NODE_PERCENTAGE:
s->min_width.value.percent = atof(v->data);
s->min_width.min_width = CSS_MIN_WIDTH_PERCENT;
break;
default:
break;
}
}
void parse_orphans(struct css_style * const s, const struct css_node * const v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->orphans.orphans = CSS_ORPHANS_INHERIT;
break;
case CSS_NODE_NUMBER:
s->orphans.value = atoi(v->data);
s->orphans.orphans = CSS_ORPHANS_INTEGER;
break;
default:
break;
}
}
void parse_outline(struct css_style * const s, const struct css_node * v)
{
css_outline_color_type c = CSS_OUTLINE_COLOR_INVERT;
colour col = 0, col2;
css_border_style b = CSS_BORDER_STYLE_NONE, b2;
struct css_border_width w = { CSS_BORDER_WIDTH_LENGTH, { 2, CSS_UNIT_PX } };
struct css_border_width w2;
while (v) {
switch (v->type) {
case CSS_NODE_HASH:
case CSS_NODE_FUNCTION:
case CSS_NODE_IDENT:
col2 = parse_colour(v);
if (col2 != CSS_COLOR_NONE) {
col = col2;
c = CSS_OUTLINE_COLOR_COLOR;
v = v->next;
break;
}
if (v->type == CSS_NODE_HASH ||
v->type == CSS_NODE_FUNCTION)
return;
/* could be inherit */
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0) {
c = CSS_OUTLINE_COLOR_INHERIT;
v = v->next;
break;
}
b2 = css_border_style_parse(v->data, v->data_length);
if (b2 != CSS_BORDER_STYLE_UNKNOWN) {
b = b2;
v = v->next;
break;
}
/* fall through */
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (css_outline_width_parse(v, &w2)) {
w = w2;
v = v->next;
break;
}
/* fall through */
default:
return;
}
}
s->outline.color.color = c;
s->outline.color.value = col;
s->outline.width = w;
s->outline.style = b;
}
void parse_outline_color(struct css_style * const s, const struct css_node * const v)
{
colour c;
if (v->next != 0)
return;
c = parse_colour(v);
if (c == CSS_COLOR_NONE && v->type == CSS_NODE_IDENT) {
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->outline.color.color = CSS_OUTLINE_COLOR_INHERIT;
else if (v->data_length == 6 &&
strncasecmp(v->data, "invert", 6) == 0)
s->outline.color.color = CSS_OUTLINE_COLOR_INVERT;
}
else {
s->outline.color.value = c;
s->outline.color.color = CSS_OUTLINE_COLOR_COLOR;
}
}
void parse_outline_style(struct css_style * const s, const struct css_node * const v)
{
css_border_style z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_border_style_parse(v->data, v->data_length);
if (z != CSS_BORDER_STYLE_UNKNOWN)
s->outline.style = z;
}
void parse_outline_width(struct css_style * const s, const struct css_node * const v)
{
struct css_border_width w;
if (v->next != 0)
return;
if (!css_outline_width_parse(v, &w))
return;
s->outline.width = w;
}
bool css_outline_width_parse(const struct css_node * v, struct css_border_width * w)
{
if (v->type == CSS_NODE_IDENT) {
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0) {
w->width = CSS_BORDER_WIDTH_INHERIT;
return true;
} else if (v->data_length == 4 &&
strncasecmp(v->data, "thin", 4) == 0) {
w->width = CSS_BORDER_WIDTH_LENGTH;
w->value.value = 1;
w->value.unit = CSS_UNIT_PX;
return true;
} else if (v->data_length == 6 &&
strncasecmp(v->data, "medium", 6) == 0) {
w->width = CSS_BORDER_WIDTH_LENGTH;
w->value.value = 2;
w->value.unit = CSS_UNIT_PX;
return true;
} else if (v->data_length == 5 &&
strncasecmp(v->data, "thick", 5) == 0) {
w->width = CSS_BORDER_WIDTH_LENGTH;
w->value.value = 4;
w->value.unit = CSS_UNIT_PX;
return true;
}
} else if ((v->type == CSS_NODE_DIMENSION ||
v->type == CSS_NODE_NUMBER) &&
parse_length(&w->value, v, true) == 0) {
w->width = CSS_BORDER_WIDTH_LENGTH;
return true;
}
return false;
}
void parse_overflow(struct css_style * const s, const struct css_node * const v)
{
css_overflow z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_overflow_parse(v->data, v->data_length);
if (z != CSS_OVERFLOW_UNKNOWN)
s->overflow = z;
}
void parse_padding(struct css_style * const s, const struct css_node * const v)
{
unsigned int count = 0;
const struct css_node *w;
for (w = v; w; w = w->next, count++)
if (!((w->type == CSS_NODE_IDENT && w->data_length == 7 &&
strncasecmp(w->data, "inherit", 7) == 0) ||
(w->type == CSS_NODE_PERCENTAGE) ||
(w->type == CSS_NODE_DIMENSION) ||
(w->type == CSS_NODE_NUMBER)))
return;
w = v;
switch (count) {
case 1: /* one value: applies to all sides */
parse_padding_side(s, w, TOP);
parse_padding_side(s, w, RIGHT);
parse_padding_side(s, w, BOTTOM);
parse_padding_side(s, w, LEFT);
break;
case 2: /* (top and bottom), (left and right) */
parse_padding_side(s, w, TOP);
parse_padding_side(s, w, BOTTOM);
w = w->next;
parse_padding_side(s, w, RIGHT);
parse_padding_side(s, w, LEFT);
break;
case 3: /* top, (left and right), bottom */
parse_padding_side(s, w, TOP);
w = w->next;
parse_padding_side(s, w, RIGHT);
parse_padding_side(s, w, LEFT);
w = w->next;
parse_padding_side(s, w, BOTTOM);
break;
case 4: /* top, right, bottom, left */
parse_padding_side(s, w, TOP);
w = w->next;
parse_padding_side(s, w, RIGHT);
w = w->next;
parse_padding_side(s, w, BOTTOM);
w = w->next;
parse_padding_side(s, w, LEFT);
break;
}
}
#define PARSE_PADDING_(side, z) \
void parse_padding_ ## side(struct css_style * const s, \
const struct css_node * const v) \
{ \
if (v->next != 0) \
return; \
parse_padding_side(s, v, z); \
}
PARSE_PADDING_(top, TOP)
PARSE_PADDING_(right, RIGHT)
PARSE_PADDING_(bottom, BOTTOM)
PARSE_PADDING_(left, LEFT)
void parse_padding_side(struct css_style * const s, const struct css_node * const v,
unsigned int i)
{
if (v->type == CSS_NODE_IDENT && v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0) {
s->padding[i].padding = CSS_PADDING_INHERIT;
} else if (v->type == CSS_NODE_PERCENTAGE) {
s->padding[i].padding = CSS_PADDING_PERCENT;
s->padding[i].value.percent = atof(v->data);
} else if ((v->type == CSS_NODE_DIMENSION || v->type == CSS_NODE_NUMBER) &&
parse_length(&s->padding[i].value.length, v, true) == 0) {
s->padding[i].padding = CSS_PADDING_LENGTH;
}
}
void parse_page_break_after(struct css_style * const s, const struct css_node * v)
{
css_page_break_after z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_page_break_after_parse(v->data, v->data_length);
if (z != CSS_PAGE_BREAK_AFTER_UNKNOWN)
s->page_break_after = z;
}
void parse_page_break_before(struct css_style * const s, const struct css_node * v)
{
css_page_break_before z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_page_break_before_parse(v->data, v->data_length);
if (z != CSS_PAGE_BREAK_BEFORE_UNKNOWN)
s->page_break_before = z;
}
void parse_page_break_inside(struct css_style * const s, const struct css_node * v)
{
css_page_break_inside z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_page_break_inside_parse(v->data, v->data_length);
if (z != CSS_PAGE_BREAK_INSIDE_UNKNOWN)
s->page_break_inside = z;
}
#define PARSE_POS(side, z) \
void parse_ ## side(struct css_style * const s, \
const struct css_node * const v) \
{ \
parse_pos(s, v, z); \
}
PARSE_POS(top, TOP)
PARSE_POS(right, RIGHT)
PARSE_POS(bottom, BOTTOM)
PARSE_POS(left, LEFT)
void parse_pos(struct css_style * const s, const struct css_node * v, unsigned int i)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->pos[i].pos = CSS_POS_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "auto", 4) == 0)
s->pos[i].pos = CSS_POS_AUTO;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (parse_length(&s->pos[i].value.length, v, false) == 0)
s->pos[i].pos = CSS_POS_LENGTH;
break;
case CSS_NODE_PERCENTAGE:
s->pos[i].pos = CSS_POS_PERCENT;
s->pos[i].value.percent = atof(v->data);
break;
default:
break;
}
}
void parse_position(struct css_style * const s, const struct css_node * v)
{
css_position z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_position_parse(v->data, v->data_length);
if (z != CSS_POSITION_UNKNOWN)
s->position = z;
}
void parse_table_layout(struct css_style * const s, const struct css_node * v)
{
css_table_layout z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_table_layout_parse(v->data, v->data_length);
if (z != CSS_TABLE_LAYOUT_UNKNOWN)
s->table_layout = z;
}
void parse_text_align(struct css_style * const s, const struct css_node * const v)
{
css_text_align z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_text_align_parse(v->data, v->data_length);
if (z != CSS_TEXT_ALIGN_UNKNOWN)
s->text_align = z;
}
void parse_text_indent(struct css_style * const s, const struct css_node * const v)
{
if (v->type == CSS_NODE_IDENT) {
return;
} else if (v->type == CSS_NODE_PERCENTAGE) {
s->text_indent.size = CSS_TEXT_INDENT_PERCENT;
s->text_indent.value.percent = atof(v->data);
} else if ((v->type == CSS_NODE_DIMENSION || v->type == CSS_NODE_NUMBER) &&
parse_length(&s->text_indent.value.length, v, false) == 0) {
s->text_indent.size = CSS_TEXT_INDENT_LENGTH;
}
}
void parse_text_decoration(struct css_style * const s, const struct css_node * const v)
{
struct css_node *temp;
css_text_decoration z;
if (v->type != CSS_NODE_IDENT)
return;
z = css_text_decoration_parse(v->data, v->data_length);
if (z == CSS_TEXT_DECORATION_INHERIT || z == CSS_TEXT_DECORATION_NONE) {
if (v->next != 0)
return;
s->text_decoration = z;
}
if (z != CSS_TEXT_DECORATION_UNKNOWN)
s->text_decoration |= z;
for (temp = v->next; temp; temp = temp->next) {
z = css_text_decoration_parse(temp->data, temp->data_length);
if (z != CSS_TEXT_DECORATION_UNKNOWN)
s->text_decoration |= z;
}
}
void parse_text_transform(struct css_style * const s, const struct css_node * const v)
{
css_text_transform z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_text_transform_parse(v->data, v->data_length);
if (z != CSS_TEXT_TRANSFORM_UNKNOWN)
s->text_transform = z;
}
void parse_unicode_bidi(struct css_style * const s, const struct css_node * const v)
{
css_unicode_bidi z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_unicode_bidi_parse(v->data, v->data_length);
if (z != CSS_UNICODE_BIDI_UNKNOWN)
s->unicode_bidi = z;
}
void parse_vertical_align(struct css_style * const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_INHERIT;
else if (v->data_length == 8 &&
strncasecmp(v->data, "baseline", 8) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_BASELINE;
else if (v->data_length == 3 &&
strncasecmp(v->data, "sub", 3) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_SUB;
else if (v->data_length == 5 &&
strncasecmp(v->data, "super", 5) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_SUPER;
else if (v->data_length == 3 &&
strncasecmp(v->data, "top", 3) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_TOP;
else if (v->data_length == 8 &&
strncasecmp(v->data, "text-top", 8) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_TEXT_TOP;
else if (v->data_length == 6 &&
strncasecmp(v->data, "middle", 6) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_MIDDLE;
else if (v->data_length == 6 &&
strncasecmp(v->data, "bottom", 6) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_BOTTOM;
else if (v->data_length == 11 &&
strncasecmp(v->data, "text-bottom", 11) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_TEXT_BOTTOM;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (parse_length(&s->vertical_align.value.length, v, false) == 0)
s->vertical_align.type = CSS_VERTICAL_ALIGN_LENGTH;
break;
case CSS_NODE_PERCENTAGE:
s->vertical_align.value.percent = atof(v->data);
s->vertical_align.type = CSS_VERTICAL_ALIGN_PERCENT;
break;
default:
break;
}
}
void parse_visibility(struct css_style * const s, const struct css_node * const v)
{
css_visibility z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_visibility_parse(v->data, v->data_length);
if (z != CSS_VISIBILITY_UNKNOWN)
s->visibility = z;
}
void parse_widows(struct css_style * const s, const struct css_node * const v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->widows.widows = CSS_WIDOWS_INHERIT;
break;
case CSS_NODE_NUMBER:
s->widows.value = atoi(v->data);
s->widows.widows = CSS_WIDOWS_INTEGER;
break;
default:
break;
}
}
void parse_width(struct css_style * const s, const struct css_node * const v)
{
if (v->type == CSS_NODE_IDENT && v->data_length == 4 &&
strncasecmp(v->data, "auto", 4) == 0)
s->width.width = CSS_WIDTH_AUTO;
else if (v->type == CSS_NODE_PERCENTAGE) {
s->width.width = CSS_WIDTH_PERCENT;
s->width.value.percent = atof(v->data);
} else if ((v->type == CSS_NODE_DIMENSION || v->type == CSS_NODE_NUMBER) &&
parse_length(&s->width.value.length, v, true) == 0)
s->width.width = CSS_WIDTH_LENGTH;
}
void parse_white_space(struct css_style * const s, const struct css_node * const v)
{
css_white_space z;
if (v->type != CSS_NODE_IDENT || v->next != 0)
return;
z = css_white_space_parse(v->data, v->data_length);
if (z != CSS_WHITE_SPACE_UNKNOWN)
s->white_space = z;
}
void parse_word_spacing(struct css_style * const s, const struct css_node * v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->word_spacing.word_spacing = CSS_WORD_SPACING_INHERIT;
else if (v->data_length == 6 &&
strncasecmp(v->data, "normal", 6) == 0)
s->word_spacing.word_spacing = CSS_WORD_SPACING_NORMAL;
break;
case CSS_NODE_DIMENSION:
case CSS_NODE_NUMBER:
if (parse_length(&s->word_spacing.length, v, false) == 0)
s->word_spacing.word_spacing = CSS_WORD_SPACING_LENGTH;
break;
default:
break;
}
}
void parse_z_index(struct css_style * const s, const struct css_node * const v)
{
if (v->next != 0)
return;
switch (v->type) {
case CSS_NODE_IDENT:
if (v->data_length == 7 &&
strncasecmp(v->data, "inherit", 7) == 0)
s->z_index.z_index = CSS_Z_INDEX_INHERIT;
else if (v->data_length == 4 &&
strncasecmp(v->data, "auto", 4) == 0)
s->z_index.z_index = CSS_Z_INDEX_AUTO;
break;
case CSS_NODE_NUMBER:
s->z_index.value = atoi(v->data);
s->z_index.z_index = CSS_Z_INDEX_INTEGER;
break;
default:
break;
}
}
css_text_decoration css_text_decoration_parse(const char * const s,
int length)
{
if (length == 7 && strncasecmp(s, "inherit", 7) == 0)
return CSS_TEXT_DECORATION_INHERIT;
if (length == 4 && strncasecmp(s, "none", 4) == 0)
return CSS_TEXT_DECORATION_NONE;
if (length == 5 && strncasecmp(s, "blink", 5) == 0)
return CSS_TEXT_DECORATION_BLINK;
if (length == 12 && strncasecmp(s, "line-through", 12) == 0)
return CSS_TEXT_DECORATION_LINE_THROUGH;
if (length == 8 && strncasecmp(s, "overline", 8) == 0)
return CSS_TEXT_DECORATION_OVERLINE;
if (length == 9 && strncasecmp(s, "underline", 9) == 0)
return CSS_TEXT_DECORATION_UNDERLINE;
return CSS_TEXT_DECORATION_UNKNOWN;
}
/** \} */
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