forked from KolibriOS/kolibrios
294 lines
8.4 KiB
C
294 lines
8.4 KiB
C
/*
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* This file is part of LibCSS.
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* Licensed under the MIT License,
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* http://www.opensource.org/licenses/mit-license.php
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* Copyright 2008 John-Mark Bell <jmb@netsurf-browser.org>
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*/
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#ifndef css_stylesheet_h_
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#define css_stylesheet_h_
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#include <inttypes.h>
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#include <stdio.h>
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#include <libwapcaplet/libwapcaplet.h>
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#include <libcss/errors.h>
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#include <libcss/functypes.h>
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#include <libcss/stylesheet.h>
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#include <libcss/types.h>
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#include "bytecode/bytecode.h"
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#include "parse/parse.h"
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#include "select/hash.h"
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typedef struct css_rule css_rule;
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typedef struct css_selector css_selector;
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typedef struct css_style {
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css_code_t *bytecode; /**< Pointer to bytecode */
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uint32_t used; /**< number of code entries used */
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uint32_t allocated; /**< number of allocated code entries */
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struct css_stylesheet *sheet; /**< containing sheet */
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} css_style;
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typedef enum css_selector_type {
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CSS_SELECTOR_ELEMENT,
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CSS_SELECTOR_CLASS,
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CSS_SELECTOR_ID,
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CSS_SELECTOR_PSEUDO_CLASS,
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CSS_SELECTOR_PSEUDO_ELEMENT,
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CSS_SELECTOR_ATTRIBUTE,
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CSS_SELECTOR_ATTRIBUTE_EQUAL,
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CSS_SELECTOR_ATTRIBUTE_DASHMATCH,
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CSS_SELECTOR_ATTRIBUTE_INCLUDES,
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CSS_SELECTOR_ATTRIBUTE_PREFIX,
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CSS_SELECTOR_ATTRIBUTE_SUFFIX,
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CSS_SELECTOR_ATTRIBUTE_SUBSTRING
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} css_selector_type;
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typedef enum css_combinator {
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CSS_COMBINATOR_NONE,
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CSS_COMBINATOR_ANCESTOR,
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CSS_COMBINATOR_PARENT,
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CSS_COMBINATOR_SIBLING,
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CSS_COMBINATOR_GENERIC_SIBLING
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} css_combinator;
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typedef enum css_selector_detail_value_type {
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CSS_SELECTOR_DETAIL_VALUE_STRING,
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CSS_SELECTOR_DETAIL_VALUE_NTH
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} css_selector_detail_value_type;
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typedef union css_selector_detail_value {
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lwc_string *string; /**< Interned string, or NULL */
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struct {
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int32_t a;
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int32_t b;
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} nth; /**< Data for x = an + b */
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} css_selector_detail_value;
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typedef struct css_selector_detail {
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css_qname qname; /**< Interned name */
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css_selector_detail_value value; /**< Detail value */
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unsigned int type : 4, /**< Type of selector */
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comb : 3, /**< Type of combinator */
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next : 1, /**< Another selector detail
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* follows */
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value_type : 1, /**< Type of value field */
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negate : 1; /**< Detail match is inverted */
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} css_selector_detail;
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struct css_selector {
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css_selector *combinator; /**< Combining selector */
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css_rule *rule; /**< Owning rule */
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#define CSS_SPECIFICITY_A 0x01000000
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#define CSS_SPECIFICITY_B 0x00010000
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#define CSS_SPECIFICITY_C 0x00000100
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#define CSS_SPECIFICITY_D 0x00000001
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uint32_t specificity; /**< Specificity of selector */
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css_selector_detail data; /**< Selector data */
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};
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typedef enum css_rule_type {
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CSS_RULE_UNKNOWN,
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CSS_RULE_SELECTOR,
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CSS_RULE_CHARSET,
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CSS_RULE_IMPORT,
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CSS_RULE_MEDIA,
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CSS_RULE_FONT_FACE,
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CSS_RULE_PAGE
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} css_rule_type;
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typedef enum css_rule_parent_type {
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CSS_RULE_PARENT_STYLESHEET,
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CSS_RULE_PARENT_RULE
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} css_rule_parent_type;
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struct css_rule {
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void *parent; /**< containing rule or owning
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* stylesheet (defined by ptype)
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*/
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css_rule *next; /**< next in list */
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css_rule *prev; /**< previous in list */
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unsigned int type : 4, /**< css_rule_type */
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index : 16, /**< index in sheet */
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items : 8, /**< # items in rule */
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ptype : 1; /**< css_rule_parent_type */
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} extern _ALIGNED;
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typedef struct css_rule_selector {
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css_rule base;
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css_selector **selectors;
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css_style *style;
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} css_rule_selector;
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typedef struct css_rule_media {
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css_rule base;
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uint64_t media;
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css_rule *first_child;
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css_rule *last_child;
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} css_rule_media;
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typedef struct css_rule_font_face {
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css_rule base;
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css_font_face *font_face;
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} css_rule_font_face;
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typedef struct css_rule_page {
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css_rule base;
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css_selector *selector;
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css_style *style;
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} css_rule_page;
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typedef struct css_rule_import {
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css_rule base;
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lwc_string *url;
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uint64_t media;
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css_stylesheet *sheet;
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} css_rule_import;
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typedef struct css_rule_charset {
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css_rule base;
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lwc_string *encoding; /** \todo use MIB enum? */
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} css_rule_charset;
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struct css_stylesheet {
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css_selector_hash *selectors; /**< Hashtable of selectors */
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uint32_t rule_count; /**< Number of rules in sheet */
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css_rule *rule_list; /**< List of rules in sheet */
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css_rule *last_rule; /**< Last rule in list */
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bool disabled; /**< Whether this sheet is
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* disabled */
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char *url; /**< URL of this sheet */
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char *title; /**< Title of this sheet */
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css_language_level level; /**< Language level of sheet */
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css_parser *parser; /**< Core parser for sheet */
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void *parser_frontend; /**< Frontend parser */
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lwc_string **propstrings; /**< Property strings, for parser */
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bool quirks_allowed; /**< Quirks permitted */
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bool quirks_used; /**< Quirks actually used */
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bool inline_style; /**< Is an inline style */
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size_t size; /**< Size, in bytes */
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css_import_notification_fn import; /**< Import notification function */
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void *import_pw; /**< Private word */
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css_url_resolution_fn resolve; /**< URL resolution function */
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void *resolve_pw; /**< Private word */
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css_color_resolution_fn color; /**< Colour resolution function */
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void *color_pw; /**< Private word */
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/** System font resolution function */
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css_font_resolution_fn font;
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void *font_pw; /**< Private word */
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css_allocator_fn alloc; /**< Allocation function */
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void *pw; /**< Private word */
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css_style *cached_style; /**< Cache for style parsing */
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lwc_string **string_vector; /**< Bytecode string vector */
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uint32_t string_vector_l; /**< The string vector allocated
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* length in entries */
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uint32_t string_vector_c; /**< The number of string
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* vector entries used */
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};
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css_error css__stylesheet_style_create(css_stylesheet *sheet,
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css_style **style);
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css_error css__stylesheet_style_append(css_style *style, css_code_t code);
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css_error css__stylesheet_style_vappend(css_style *style, uint32_t style_count,
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...);
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css_error css__stylesheet_style_destroy(css_style *style);
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css_error css__stylesheet_merge_style(css_style *target, css_style *style);
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/** Helper function to avoid distinct buildOPV call */
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static inline css_error css__stylesheet_style_appendOPV(css_style *style,
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opcode_t opcode, uint8_t flags, uint16_t value)
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{
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return css__stylesheet_style_append(style,
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buildOPV(opcode, flags, value));
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}
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/** Helper function to set inherit flag */
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static inline css_error css_stylesheet_style_inherit(css_style *style,
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opcode_t opcode)
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{
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return css__stylesheet_style_append(style,
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buildOPV(opcode, FLAG_INHERIT, 0));
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}
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css_error css__stylesheet_selector_create(css_stylesheet *sheet,
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css_qname *qname, css_selector **selector);
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css_error css__stylesheet_selector_destroy(css_stylesheet *sheet,
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css_selector *selector);
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css_error css__stylesheet_selector_detail_init(css_stylesheet *sheet,
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css_selector_type type, css_qname *qname,
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css_selector_detail_value value,
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css_selector_detail_value_type value_type,
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bool negate, css_selector_detail *detail);
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css_error css__stylesheet_selector_append_specific(css_stylesheet *sheet,
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css_selector **parent, const css_selector_detail *specific);
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css_error css__stylesheet_selector_combine(css_stylesheet *sheet,
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css_combinator type, css_selector *a, css_selector *b);
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css_error css__stylesheet_rule_create(css_stylesheet *sheet, css_rule_type type,
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css_rule **rule);
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css_error css__stylesheet_rule_destroy(css_stylesheet *sheet, css_rule *rule);
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css_error css__stylesheet_rule_add_selector(css_stylesheet *sheet,
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css_rule *rule, css_selector *selector);
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css_error css__stylesheet_rule_append_style(css_stylesheet *sheet,
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css_rule *rule, css_style *style);
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css_error css__stylesheet_rule_set_charset(css_stylesheet *sheet,
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css_rule *rule, lwc_string *charset);
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css_error css__stylesheet_rule_set_nascent_import(css_stylesheet *sheet,
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css_rule *rule, lwc_string *url, uint64_t media);
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css_error css__stylesheet_rule_set_media(css_stylesheet *sheet,
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css_rule *rule, uint64_t media);
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css_error css__stylesheet_rule_set_page_selector(css_stylesheet *sheet,
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css_rule *rule, css_selector *sel);
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css_error css__stylesheet_add_rule(css_stylesheet *sheet, css_rule *rule,
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css_rule *parent);
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css_error css__stylesheet_remove_rule(css_stylesheet *sheet, css_rule *rule);
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css_error css__stylesheet_string_get(css_stylesheet *sheet,
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uint32_t string_number, lwc_string **string);
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css_error css__stylesheet_string_add(css_stylesheet *sheet,
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lwc_string *string, uint32_t *string_number);
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#endif
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