From ddeadd1c02880367ad786b113d352a519f45ec73 Mon Sep 17 00:00:00 2001
From: John Mark Bell <jmb@netsurf-browser.org>
Date: Thu, 23 Jul 2009 23:05:34 +0000
Subject: Merge LibCSS port to trunk.

svn path=/trunk/netsurf/; revision=8752
---
 css/css.h | 705 ++------------------------------------------------------------
 1 file changed, 19 insertions(+), 686 deletions(-)

(limited to 'css/css.h')

diff --git a/css/css.h b/css/css.h
index 11aa6a195..e20d2dd9f 100644
--- a/css/css.h
+++ b/css/css.h
@@ -1,6 +1,5 @@
 /*
- * Copyright 2004 James Bursa <bursa@users.sourceforge.net>
- * Copyright 2004 John M Bell <jmb202@ecs.soton.ac.uk>
+ * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
  *
  * This file is part of NetSurf, http://www.netsurf-browser.org/
  *
@@ -17,700 +16,34 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** \file
- * CSS handling (interface).
- *
- * This module aims to implement CSS 2.1.
- *
- * CSS stylesheets are held in a struct ::content with type CONTENT_CSS.
- * Creation and parsing should be carried out via the content_* functions.
- *
- * Styles are stored in a struct ::css_style, which can be retrieved from a
- * content using css_get_style().
- *
- * css_parse_property_list() constructs a struct ::css_style from a CSS
- * property list, as found in HTML style attributes.
- */
-
-#ifndef _NETSURF_CSS_CSS_H_
-#define _NETSURF_CSS_CSS_H_
-
-#include <stdint.h>
-#include <stdbool.h>
-#include <libxml/HTMLparser.h>
-#include "css/css_enum.h"
-
-
-typedef uint32_t colour;  /* 0xbbggrr */
-#define NS_TRANSPARENT 0x1000000
-#define CSS_COLOR_INHERIT 0x2000000
-#define CSS_COLOR_NONE 0x3000000
-#define CSS_COLOR_NOT_SET 0x4000000
-#define TOP 0
-#define RIGHT 1
-#define BOTTOM 2
-#define LEFT 3
-#define CSS_SPECIFICITY_UA 0x0000000
-#define CSS_SPECIFICITY_USER 0x1000000
-#define CSS_SPECIFICITY_AUTHOR 0x2000000
-#define CSS_SPECIFICITY_ID 0x10000
-#define CSS_SPECIFICITY_CLASS 0x100
-#define CSS_SPECIFICITY_ATTR 0x100
-#define CSS_SPECIFICITY_ELEMENT 0x1
-
-
-struct css_working_stylesheet;
-
-
-/** Representation of a CSS 2 length. */
-struct css_length {
-	float value;
-	css_unit unit;
-};
-
-typedef enum {
-	CSS_TEXT_DECORATION_NONE = 0x0,
-	CSS_TEXT_DECORATION_INHERIT = 0x1,
-	CSS_TEXT_DECORATION_UNDERLINE = 0x2,
-	CSS_TEXT_DECORATION_BLINK = 0x4,
-	CSS_TEXT_DECORATION_LINE_THROUGH = 0x8,
-	CSS_TEXT_DECORATION_OVERLINE = 0x10,
-	CSS_TEXT_DECORATION_UNKNOWN = 0x1000,
-	CSS_TEXT_DECORATION_NOT_SET = 0x2000
-} css_text_decoration;
-
-typedef enum {
-	CSS_BACKGROUND_IMAGE_NONE,
-	CSS_BACKGROUND_IMAGE_INHERIT,
-	CSS_BACKGROUND_IMAGE_URI,
-	CSS_BACKGROUND_IMAGE_NOT_SET
-} css_background_image_type;
-
-/** Part of struct css_style, for convenience. */
-struct css_background_position {
-	enum {
-		CSS_BACKGROUND_POSITION_LENGTH,
-		CSS_BACKGROUND_POSITION_PERCENT,
-		CSS_BACKGROUND_POSITION_INHERIT,
-		CSS_BACKGROUND_POSITION_NOT_SET
-	} pos;
-	union {
-		float percent;
-		struct css_length length;
-	} value;
-};
-
-struct css_border_width {
-	enum { CSS_BORDER_WIDTH_INHERIT,
-	       CSS_BORDER_WIDTH_LENGTH,
-	       CSS_BORDER_WIDTH_NOT_SET } width;
-	struct css_length value;
-};
-
-struct css_border {
-	colour color;
-	struct css_border_width width;
-	css_border_style style;
-};
-
-typedef enum {
-	CSS_CONTENT_STRING,
-	CSS_CONTENT_URI,
-	CSS_CONTENT_COUNTER,
-	CSS_CONTENT_ATTR,
-	CSS_CONTENT_OPEN_QUOTE,
-	CSS_CONTENT_CLOSE_QUOTE,
-	CSS_CONTENT_NO_OPEN_QUOTE,
-	CSS_CONTENT_NO_CLOSE_QUOTE
-} css_content_type_generated;
-
-typedef enum {
-	CSS_LIST_STYLE_IMAGE_INHERIT,
-	CSS_LIST_STYLE_IMAGE_NONE,
-	CSS_LIST_STYLE_IMAGE_URI,
-	CSS_LIST_STYLE_IMAGE_NOT_SET
-} css_list_style_image_type;
-
-typedef enum {
-	CSS_OUTLINE_COLOR_INHERIT,
-	CSS_OUTLINE_COLOR_COLOR,
-	CSS_OUTLINE_COLOR_INVERT,
-	CSS_OUTLINE_COLOR_NOT_SET
-} css_outline_color_type;
-
-typedef enum {
-	CSS_VERTICAL_ALIGN_INHERIT,
-	CSS_VERTICAL_ALIGN_BASELINE,
-	CSS_VERTICAL_ALIGN_SUB,
-	CSS_VERTICAL_ALIGN_SUPER,
-	CSS_VERTICAL_ALIGN_TOP,
-	CSS_VERTICAL_ALIGN_TEXT_TOP,
-	CSS_VERTICAL_ALIGN_MIDDLE,
-	CSS_VERTICAL_ALIGN_BOTTOM,
-	CSS_VERTICAL_ALIGN_TEXT_BOTTOM,
-	CSS_VERTICAL_ALIGN_LENGTH,
-	CSS_VERTICAL_ALIGN_PERCENT,
-	CSS_VERTICAL_ALIGN_NOT_SET
-} css_vertical_align_type;
-
-typedef enum {
-	CSS_FONT_SIZE_INHERIT,
-	CSS_FONT_SIZE_ABSOLUTE,
-	CSS_FONT_SIZE_LENGTH,
-	CSS_FONT_SIZE_PERCENT,
-	CSS_FONT_SIZE_NOT_SET
-} css_font_size_type;
-
-struct css_counter_control {
-	char *name;
-	int value;
-	struct css_counter_control *next;
-};
-
-struct css_counter {
-  	char *name;
-  	css_list_style_type style;
-  	char *separator; /** NULL for counter() */
-};
-
-struct css_content {
-  	css_content_type_generated type;
-  	union {
-  	  	char *string;
-  	  	char *uri;
-  		struct css_counter counter;
-  		char *attr;
-  	} data;
-  	struct css_content *next;
-};
-
-/** Representation of a complete CSS 2 style. */
-struct css_style {
-	/* background properties */
-	css_background_attachment background_attachment;
-	colour background_color;
-	struct {
-		css_background_image_type type;
-		char *uri;
-	} background_image;
-	struct {
-		struct css_background_position horz;
-		struct css_background_position vert;
-	} background_position;
-	css_background_repeat background_repeat;
-
-	/* borders */
-	struct css_border border[4];  /**< top, right, bottom, left */
-	css_border_collapse border_collapse;
-	struct {
-		enum { CSS_BORDER_SPACING_INHERIT,
-		       CSS_BORDER_SPACING_LENGTH,
-		       CSS_BORDER_SPACING_NOT_SET } border_spacing;
-		struct css_length horz;
-		struct css_length vert;
-	} border_spacing;
-
-	css_caption_side caption_side;
-	css_clear clear;
-
-	struct {
-		enum { CSS_CLIP_INHERIT,
-		       CSS_CLIP_AUTO,
-		       CSS_CLIP_RECT,
-		       CSS_CLIP_NOT_SET } clip;
-		struct {
-			enum { CSS_CLIP_RECT_AUTO,
-			       CSS_CLIP_RECT_LENGTH } rect;
-			struct css_length value;
-		} rect[4]; /**< top, right, bottom, left */
-	} clip;
-
-	colour color;
-
-	/* generated content */
-	struct {
-		enum {
- 		 	CSS_CONTENT_NORMAL,
-			CSS_CONTENT_INHERIT,
-			CSS_CONTENT_INTERPRET,
-			CSS_CONTENT_NOT_SET } type;
-		struct css_content *content;
-	} content;
-
-	/* counter controls */
-	struct {
-		enum {
-			CSS_COUNTER_RESET_NONE,
-			CSS_COUNTER_RESET_INHERIT,
-			CSS_COUNTER_RESET_INTERPRET,
-			CSS_COUNTER_RESET_NOT_SET } type;
-		struct css_counter_control *data;
-	} counter_reset;
-	struct {
-		enum {
-			CSS_COUNTER_INCREMENT_NONE,
-			CSS_COUNTER_INCREMENT_INHERIT,
-			CSS_COUNTER_INCREMENT_INTERPRET,
-			CSS_COUNTER_INCREMENT_NOT_SET } type;
-		struct css_counter_control *data;
-	} counter_increment;
-
-	css_cursor cursor;
-	css_direction direction;
-	css_display display;
-	css_empty_cells empty_cells;
-	css_float float_;
-
-	/* font properties */
-	css_font_family font_family;
-	struct {
-		css_font_size_type size;
-		union {
-			struct css_length length;
-			float absolute;
-			float percent;
-		} value;
-	} font_size;
-	css_font_style font_style;
-	css_font_variant font_variant;
-	css_font_weight font_weight;
-
-	struct {
-		enum { CSS_HEIGHT_INHERIT,
-		       CSS_HEIGHT_AUTO,
-		       CSS_HEIGHT_LENGTH,
-		       CSS_HEIGHT_PERCENT,
-		       CSS_HEIGHT_NOT_SET } height;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} height;
-
-	struct {
-		enum { CSS_LETTER_SPACING_INHERIT,
-		       CSS_LETTER_SPACING_NORMAL,
-		       CSS_LETTER_SPACING_LENGTH,
-		       CSS_LETTER_SPACING_NOT_SET } letter_spacing;
-		struct css_length length;
-	} letter_spacing;
-
-	struct {
-		enum { CSS_LINE_HEIGHT_INHERIT,
-		       CSS_LINE_HEIGHT_ABSOLUTE,
-		       CSS_LINE_HEIGHT_LENGTH,
-		       CSS_LINE_HEIGHT_PERCENT,
-		       CSS_LINE_HEIGHT_NOT_SET } size;
-		union {
-			float absolute;
-			struct css_length length;
-			float percent;
-		} value;
-	} line_height;
-
-	/* list properties */
-	struct {
-		css_list_style_image_type type;
-		char *uri;
-	} list_style_image;
-	css_list_style_position list_style_position;
-	css_list_style_type list_style_type;
-
-	/* margins */
-	struct {
-		enum { CSS_MARGIN_INHERIT,
-		       CSS_MARGIN_LENGTH,
-		       CSS_MARGIN_PERCENT,
-		       CSS_MARGIN_AUTO,
-		       CSS_MARGIN_NOT_SET } margin;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} margin[4];  /**< top, right, bottom, left */
-
-	/* min/max width/height */
-	struct {
-		enum { CSS_MAX_HEIGHT_INHERIT,
-		       CSS_MAX_HEIGHT_NONE,
-		       CSS_MAX_HEIGHT_LENGTH,
-		       CSS_MAX_HEIGHT_PERCENT,
-		       CSS_MAX_HEIGHT_NOT_SET } max_height;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} max_height;
-	struct {
-		enum { CSS_MAX_WIDTH_INHERIT,
-		       CSS_MAX_WIDTH_NONE,
-		       CSS_MAX_WIDTH_LENGTH,
-		       CSS_MAX_WIDTH_PERCENT,
-		       CSS_MAX_WIDTH_NOT_SET } max_width;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} max_width;
-	struct {
-		enum { CSS_MIN_HEIGHT_INHERIT,
-		       CSS_MIN_HEIGHT_LENGTH,
-		       CSS_MIN_HEIGHT_PERCENT,
-		       CSS_MIN_HEIGHT_NOT_SET } min_height;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} min_height;
-	struct {
-		enum { CSS_MIN_WIDTH_INHERIT,
-		       CSS_MIN_WIDTH_LENGTH,
-		       CSS_MIN_WIDTH_PERCENT,
-		       CSS_MIN_WIDTH_NOT_SET } min_width;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} min_width;
-
-	struct {
-		enum { CSS_ORPHANS_INHERIT,
-		       CSS_ORPHANS_INTEGER,
-		       CSS_ORPHANS_NOT_SET } orphans;
-		int value;
-	} orphans;
-
-	struct {
-		struct {
-			css_outline_color_type color;
-			colour value;
-		} color;
-		struct css_border_width width;
-		css_border_style style;
-	} outline;
-
-	css_overflow overflow;
-
-	/* padding */
-	struct {
-		enum { CSS_PADDING_INHERIT,
-		       CSS_PADDING_LENGTH,
-		       CSS_PADDING_PERCENT,
-		       CSS_PADDING_NOT_SET } padding;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} padding[4];  /**< top, right, bottom, left */
+#ifndef netsurf_css_css_h_
+#define netsurf_css_css_h_
 
-	css_page_break_after page_break_after;
-	css_page_break_before page_break_before;
-	css_page_break_inside page_break_inside;
+#include <libcss/libcss.h>
 
-	struct {
-		enum { CSS_POS_INHERIT,
-		       CSS_POS_AUTO,
-		       CSS_POS_PERCENT,
-		       CSS_POS_LENGTH,
-		       CSS_POS_NOT_SET } pos;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} pos[4]; /**< top, right, bottom, left */
-
-	css_position position;
-
-	/** \todo quotes */
-
-	css_table_layout table_layout;
-
-	/* text properties */
-	css_text_align text_align;
-	css_text_decoration text_decoration;
-	struct {
-		enum { CSS_TEXT_INDENT_INHERIT,
-		       CSS_TEXT_INDENT_LENGTH,
-		       CSS_TEXT_INDENT_PERCENT,
-		       CSS_TEXT_INDENT_NOT_SET } size;
-		union {
-		       struct css_length length;
-		       float percent;
-		} value ;
-	} text_indent;
-	css_text_transform text_transform;
-
-	css_unicode_bidi unicode_bidi;
-
-	struct {
-		css_vertical_align_type type;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} vertical_align;
-
-	css_visibility visibility;
-
-	css_white_space white_space;
-
-	struct {
-		enum { CSS_WIDOWS_INHERIT,
-		       CSS_WIDOWS_INTEGER,
-		       CSS_WIDOWS_NOT_SET } widows;
-		int value;
-	} widows;
-
-	struct {
-		enum { CSS_WIDTH_INHERIT,
-		       CSS_WIDTH_AUTO,
-		       CSS_WIDTH_LENGTH,
-		       CSS_WIDTH_PERCENT,
-		       CSS_WIDTH_NOT_SET } width;
-		union {
-			struct css_length length;
-			float percent;
-		} value;
-	} width;
-
-	struct {
-		enum { CSS_WORD_SPACING_INHERIT,
-		       CSS_WORD_SPACING_NORMAL,
-		       CSS_WORD_SPACING_LENGTH,
-		       CSS_WORD_SPACING_NOT_SET } word_spacing;
-		struct css_length length;
-	} word_spacing;
-
-	struct {
-		enum { CSS_Z_INDEX_INHERIT,
-		       CSS_Z_INDEX_AUTO,
-		       CSS_Z_INDEX_INTEGER,
-		       CSS_Z_INDEX_NOT_SET } z_index;
-		int value;
-	} z_index;
-};
-
-/** Author level CSS importance info for properties that may be set in HTML */
-struct css_importance {
-	/* background properties */
-	bool background_color;
-	bool background_image;
-
-	/* borders */
-	bool border_style[4];  /**< top, right, bottom, left */
-	bool border_color[4];
-	bool border_width[4];
-	bool border_spacing;
-
-	bool color;
-
-	bool height;
-
-	/* margins */
-	bool margin[4];  /**< top, right, bottom, left */
-
-	/* padding */
-	bool padding[4];  /**< top, right, bottom, left */
-
-	bool width;
-};
-
-struct css_stylesheet;
-
-typedef enum {
-	CSS_ORIGIN_AUTHOR,
-	CSS_ORIGIN_USER,
-	CSS_ORIGIN_UA
-} css_origin;
-
-/** Data specific to CONTENT_CSS. */
-struct content_css_data {
-	struct css_stylesheet *css;	/**< Opaque stylesheet data. */
-	unsigned int import_count;	/**< Number of entries in import_url. */
-	struct content **import_content; /**< Imported stylesheet contents. */
-	css_origin origin;		/**< Origin of stylesheet. */
-};
-
-
-extern const struct css_style css_base_style;
-extern const struct css_style css_empty_style;
-extern const struct css_style css_blank_style;
-extern float css_screen_dpi;
-
-
-#ifdef CSS_INTERNALS
-
-/** Type of a css_selector. */
-typedef enum {
-	CSS_SELECTOR_ELEMENT,
-	CSS_SELECTOR_ID,
-	CSS_SELECTOR_CLASS,
-	CSS_SELECTOR_ATTRIB,
-	CSS_SELECTOR_ATTRIB_EQ,
-	CSS_SELECTOR_ATTRIB_INC,
-	CSS_SELECTOR_ATTRIB_DM,
-	CSS_SELECTOR_ATTRIB_PRE,
-	CSS_SELECTOR_ATTRIB_SUF,
-	CSS_SELECTOR_ATTRIB_SUB,
-	CSS_SELECTOR_PSEUDO,
-} css_selector_type;
-
-/** Relationship to combiner in a css_selector. */
-typedef enum {
-	CSS_COMB_NONE,
-	CSS_COMB_ANCESTOR,
-	CSS_COMB_PARENT,
-	CSS_COMB_PRECEDED,
-} css_combinator;
-
-/** Representation of a CSS selector. */
-struct css_selector {
-	css_selector_type type;
-	const char *data;
-	unsigned int data_length;
-	const char *data2;
-	unsigned int data2_length;
-	struct css_selector *detail;
-	struct css_selector *combiner;
-	struct css_selector *next;
-	css_combinator comb;
-	struct css_style *style;
-	unsigned long specificity;
-};
-
-/** Type of a css_node. */
-typedef enum {
-	CSS_NODE_DECLARATION,
-	CSS_NODE_IDENT,
-	CSS_NODE_NUMBER,
-	CSS_NODE_PERCENTAGE,
-	CSS_NODE_DIMENSION,
-	CSS_NODE_STRING,
-	CSS_NODE_DELIM,
-	CSS_NODE_URI,
-	CSS_NODE_HASH,
-	CSS_NODE_UNICODE_RANGE,
-	CSS_NODE_INCLUDES,
-	CSS_NODE_FUNCTION,
-	CSS_NODE_DASHMATCH,
-	CSS_NODE_PREFIX,
-	CSS_NODE_SUFFIX,
-	CSS_NODE_SUBSTR,
-	CSS_NODE_COLON,
-	CSS_NODE_COMMA,
-	CSS_NODE_DOT,
-	CSS_NODE_PLUS,
-	CSS_NODE_GT,
-	CSS_NODE_PAREN,
-	CSS_NODE_BRAC,
-} css_node_type;
-
-/** A node in a CSS parse tree. */
-struct css_node {
-	css_node_type type;
-	const char *data;
-	unsigned int data_length;
-	struct css_node *value;
-	struct css_node *next;
-	css_combinator comb;
-	struct css_style *style;
-	unsigned long specificity;
-	struct content *stylesheet;
-};
-
-
-#define HASH_SIZE (47 + 1)
+struct content;
 
-/** Representation of a CSS 2 style sheet. */
-struct css_stylesheet {
-	struct css_selector *rule[HASH_SIZE];
-};
+/**
+ * CSS content data
+ */
+struct content_css_data
+{
+	lwc_context *dict;		/**< Dictionary to intern strings in */
 
-/** Parameters to and results from the CSS parser. */
-struct css_parser_params {
-	bool ruleset_only;
-	struct content *stylesheet;
-	struct css_node *declaration;
-	bool syntax_error;
-	bool memory_error;
-	bool had_ruleset;
-};
+	css_stylesheet *sheet;		/**< Stylesheet object */
 
-/** Token type for the CSS parser. */
-struct css_parser_token {
-	const char *text;
-	unsigned int length;
+	uint32_t import_count;		/**< Number of sheets imported */
+	struct content **imports;	/**< Array of imported sheets */
 };
 
-#endif
-
-
-struct content;
+bool nscss_create(struct content *c, struct content *parent, 
+		const char *params[]);
 
-bool css_convert(struct content *c, int width, int height);
-void css_destroy(struct content *c);
+bool nscss_process_data(struct content *c, char *data, unsigned int size);
 
-#ifdef CSS_INTERNALS
+bool nscss_convert(struct content *c, int w, int h);
 
-struct css_node * css_new_node(struct content *stylesheet,
-		css_node_type type,
-		const char *data, unsigned int data_length);
-void css_free_node(struct css_node *node);
-struct css_selector * css_new_selector(css_selector_type type,
-		const char *data, unsigned int data_length);
-void css_free_selector(struct css_selector *node);
-void css_atimport(struct content *c, struct css_node *node);
-void css_add_ruleset(struct content *c,
-		struct css_selector *selector,
-		struct css_node *declaration);
-void css_add_declarations(struct css_style *style,
-		struct css_node *declaration);
-unsigned int css_hash(const char *s, int length);
-
-int css_tokenise(unsigned char **buffer, unsigned char *end,
-		unsigned char **token_text);
-
-void css_parser_Trace(FILE *TraceFILE, char *zTracePrompt);
-void *css_parser_Alloc(void *(*mallocProc)(size_t));
-void css_parser_Free(void *p, void (*freeProc)(void*));
-void css_parser_(void *yyp, int yymajor, struct css_parser_token yyminor,
-		struct css_parser_params *param);
-const char *css_parser_TokenName(int tokenType);
+void nscss_destroy(struct content *c);
 
 #endif
 
-void css_set_origin(struct content *c, css_origin origin);
-struct css_working_stylesheet *css_make_working_stylesheet(
-		struct content **stylesheet_content,
-		unsigned int stylesheet_count);
-void css_get_style(struct css_working_stylesheet *working_stylesheet,
-		xmlNode *element, struct css_style *style,
-		struct css_importance *author);
-struct css_style *css_duplicate_style(const struct css_style * const style);
-void css_free_style(struct css_style *style);
-void css_deep_free_content(struct css_content *content);
-void css_deep_free_counter_control(struct css_counter_control *control);
-void css_cascade(struct css_style * const style,
-		const struct css_style * const apply,
-		struct css_importance * const author);
-void css_merge(struct css_style * const style,
-		const struct css_style * const apply,
-		const unsigned long specificity,
-		struct css_importance * const author);
-void css_parse_property_list(struct content *c, struct css_style * style,
-		char * str);
-colour named_colour(const char *name);
-colour hex_colour(const char *text, int length);
-
-void css_dump_style(FILE *stream, const struct css_style * const style);
-void css_dump_stylesheet(const struct css_stylesheet * stylesheet);
-
-float css_len2px(const struct css_length *length,
-		const struct css_style *style);
-float css_len2pt(const struct css_length *length,
-		const struct css_style *style);
-struct css_border *css_eyecatching_border(struct css_border *test1,
-		struct css_style *style1, struct css_border *test2,
-		struct css_style *style2);
-
-#endif
-- 
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