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/*
* This file is part of LibCSS.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2008 John-Mark Bell <jmb@netsurf-browser.org>
*/
#ifndef libcss_stylesheet_h_
#define libcss_stylesheet_h_
#ifdef __cplusplus
extern "C"
{
#endif
#include <libcss/errors.h>
#include <libcss/types.h>
#include <libcss/properties.h>
/**
* Callback to resolve an URL
*
* \param pw Client data
* \param dict String internment context
* \param base Base URI (absolute)
* \param rel URL to resolve, either absolute or relative to base
* \param abs Pointer to location to receive result
* \return CSS_OK on success, appropriate error otherwise.
*/
typedef css_error (*css_url_resolution_fn)(void *pw,
const char *base, lwc_string *rel, lwc_string **abs);
/**
* Callback to be notified of the need for an imported stylesheet
*
* \param pw Client data
* \param parent Stylesheet requesting the import
* \param url URL of the imported sheet
* \param media Applicable media for the imported sheet
* \return CSS_OK on success, appropriate error otherwise
*
* \note This function will be invoked for notification purposes
* only. The client may use this to trigger a parallel fetch
* of the imported stylesheet. The imported sheet must be
* registered with its parent using the post-parse import
* registration API.
*/
typedef css_error (*css_import_notification_fn)(void *pw,
css_stylesheet *parent, lwc_string *url, uint64_t media);
/**
* Callback use to resolve system colour names to RGB values
*
* \param pw Client data
* \param name System colour name
* \param color Pointer to location to receive color value
* \return CSS_OK on success,
* CSS_INVALID if the name is unknown.
*/
typedef css_error (*css_color_resolution_fn)(void *pw,
lwc_string *name, css_color *color);
/** System font callback result data. */
typedef struct css_system_font {
enum css_font_style_e style;
enum css_font_variant_e variant;
enum css_font_weight_e weight;
struct {
css_fixed size;
css_unit unit;
} size;
struct {
css_fixed size;
css_unit unit;
} line_height;
/* Note: must be a single family name only */
lwc_string *family;
} css_system_font;
/**
* Callback use to resolve system font names to font values
*
* \param pw Client data
* \param name System font identifier
* \param system_font Pointer to system font descriptor to be filled
* \return CSS_OK on success,
* CSS_INVALID if the name is unknown.
*/
typedef css_error (*css_font_resolution_fn)(void *pw,
lwc_string *name, css_system_font *system_font);
typedef enum css_stylesheet_params_version {
CSS_STYLESHEET_PARAMS_VERSION_1 = 1
} css_stylesheet_params_version;
/**
* Parameter block for css_stylesheet_create()
*/
typedef struct css_stylesheet_params {
/** ABI version of this structure */
uint32_t params_version;
/** The language level of the stylesheet */
css_language_level level;
/** The charset of the stylesheet data, or NULL to detect */
const char *charset;
/** URL of stylesheet */
const char *url;
/** Title of stylesheet */
const char *title;
/** Permit quirky parsing of stylesheet */
bool allow_quirks;
/** This stylesheet is an inline style */
bool inline_style;
/** URL resolution function */
css_url_resolution_fn resolve;
/** Client private data for resolve */
void *resolve_pw;
/** Import notification function */
css_import_notification_fn import;
/** Client private data for import */
void *import_pw;
/** Colour resolution function */
css_color_resolution_fn color;
/** Client private data for color */
void *color_pw;
/** Font resolution function */
css_font_resolution_fn font;
/** Client private data for font */
void *font_pw;
} css_stylesheet_params;
css_error css_stylesheet_create(const css_stylesheet_params *params,
css_allocator_fn alloc, void *alloc_pw,
css_stylesheet **stylesheet);
css_error css_stylesheet_destroy(css_stylesheet *sheet);
css_error css_stylesheet_append_data(css_stylesheet *sheet,
const uint8_t *data, size_t len);
css_error css_stylesheet_data_done(css_stylesheet *sheet);
css_error css_stylesheet_next_pending_import(css_stylesheet *parent,
lwc_string **url, uint64_t *media);
css_error css_stylesheet_register_import(css_stylesheet *parent,
css_stylesheet *child);
css_error css_stylesheet_get_language_level(css_stylesheet *sheet,
css_language_level *level);
css_error css_stylesheet_get_url(css_stylesheet *sheet, const char **url);
css_error css_stylesheet_get_title(css_stylesheet *sheet, const char **title);
css_error css_stylesheet_quirks_allowed(css_stylesheet *sheet, bool *allowed);
css_error css_stylesheet_used_quirks(css_stylesheet *sheet, bool *quirks);
css_error css_stylesheet_get_disabled(css_stylesheet *sheet, bool *disabled);
css_error css_stylesheet_set_disabled(css_stylesheet *sheet, bool disabled);
css_error css_stylesheet_size(css_stylesheet *sheet, size_t *size);
#ifdef __cplusplus
}
#endif
#endif
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