Processing for html content css operations. More...

#include "utils/config.h"
#include <assert.h>
#include <ctype.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include "utils/nsoption.h"
#include "utils/corestrings.h"
#include "utils/log.h"
#include "netsurf/inttypes.h"
#include "netsurf/misc.h"
#include "netsurf/content.h"
#include "content/hlcache.h"
#include "css/css.h"
#include "desktop/gui_internal.h"
#include "html/html.h"
#include "html/private.h"
#include "html/css.h"

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Functions
static nserror	css_error_to_nserror (css_error error)
	Convert css error to netsurf error. More...

static nserror	html_convert_css_callback (hlcache_handle css, const hlcache_event event, void *pw)
	Callback for fetchcache() for stylesheets. More...

static nserror	html_stylesheet_from_domnode (html_content c, dom_node node, hlcache_handle **sheet)

static struct html_stylesheet *	html_create_style_element (html_content c, dom_node style)
	Process an inline stylesheet in the document. More...

static bool	html_css_process_modified_style (html_content c, struct html_stylesheet s)

static void	html_css_process_modified_styles (void *pw)
	process a stylesheet that has been modified. More...

bool	html_css_update_style (html_content c, dom_node style)
	process a css style dom node update More...

bool	html_css_process_style (html_content c, dom_node node)
	process a css style dom node More...

bool	html_css_process_link (html_content htmlc, dom_node node)
	process a css stylesheet dom LINK node More...

struct html_stylesheet *	html_get_stylesheets (hlcache_handle h, unsigned int n)
	Retrieve stylesheets used by HTML document. More...

bool	html_css_saw_insecure_stylesheets (html_content *html)
	determine if any of the stylesheets were loaded insecurely More...

nserror	html_css_free_stylesheets (html_content *html)
	Free all css stylesheets associated with an HTML content. More...

nserror	html_css_quirks_stylesheets (html_content *c)
	Initialise quirk stylesheets for a content. More...

nserror	html_css_new_stylesheets (html_content *c)
	Initialise core stylesheets for a content. More...

nserror	html_css_new_selection_context (html_content c, css_select_ctx *ret_select_ctx)
	create a new css selection context for an html content. More...

nserror	html_css_init (void)
	Initialise html content css handling. More...

void	html_css_fini (void)
	Finalise html content css handling. More...

Variables
static nsurl *	html_default_stylesheet_url

static nsurl *	html_adblock_stylesheet_url

static nsurl *	html_quirks_stylesheet_url

static nsurl *	html_user_stylesheet_url

Detailed Description

Processing for html content css operations.

Definition in file css.c.

Function Documentation

◆ css_error_to_nserror()

static nserror css_error_to_nserror ( css_error error )

static

Convert css error to netsurf error.

Definition at line 55 of file css.c.

References NSERROR_BAD_ENCODING, NSERROR_BAD_PARAMETER, NSERROR_CSS, NSERROR_INVALID, NSERROR_NEED_DATA, NSERROR_NOMEM, NSERROR_NOT_FOUND, and NSERROR_OK.

Referenced by html_css_new_selection_context().

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◆ html_convert_css_callback()

static nserror html_convert_css_callback	(	hlcache_handle *	css,
		const hlcache_event *	event,
		void *	pw
	)

static

Callback for fetchcache() for stylesheets.

Definition at line 93 of file css.c.

References CONTENT_MSG_DONE, CONTENT_MSG_ERROR, CONTENT_MSG_POINTER, hlcache_event::data, content_msg_data::errordata, content_msg_data::errormsg, hlcache_handle_get_url(), hlcache_handle_release(), html_begin_conversion(), html_can_begin_conversion(), NSERROR_OK, NSLOG, nsurl_access(), parent, html_stylesheet::sheet, and hlcache_event::type.

Referenced by html_css_new_stylesheets(), html_css_process_link(), html_css_quirks_stylesheets(), and html_stylesheet_from_domnode().

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◆ html_create_style_element()

static struct html_stylesheet * html_create_style_element	(	html_content *	c,
		dom_node *	style
	)

static

Process an inline stylesheet in the document.

Parameters

c	content structure
style	xml node of style element

Returns: true on success, false if an error occurred

Definition at line 210 of file css.c.

References html_content::base, content_broadcast_error(), html_stylesheet::modified, html_stylesheet::node, NSERROR_NOMEM, html_stylesheet::sheet, strcasestr(), html_content::stylesheet_count, html_content::stylesheets, and html_stylesheet::unused.

Referenced by html_css_update_style().

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◆ html_css_fini()

void html_css_fini ( void )

Finalise html content css handling.

Definition at line 747 of file css.c.

References html_adblock_stylesheet_url, html_default_stylesheet_url, html_quirks_stylesheet_url, html_user_stylesheet_url, and nsurl_unref().

Referenced by html_fini().

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◆ html_css_free_stylesheets()

nserror html_css_free_stylesheets ( struct html_content * html )

Free all css stylesheets associated with an HTML content.

Parameters

html	The HTML content to free stylesheets from.

Returns: NSERROR_OK on success or error code.

Definition at line 531 of file css.c.

References guit, hlcache_handle_release(), html_css_process_modified_styles(), netsurf_table::misc, html_stylesheet::node, NSERROR_OK, gui_misc_table::schedule, html_stylesheet::sheet, html_content::stylesheet_count, and html_content::stylesheets.

Referenced by html_destroy().

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◆ html_css_init()

nserror html_css_init ( void )

Initialise html content css handling.

Returns: NSERROR_OK on success else error code

Definition at line 716 of file css.c.

References html_adblock_stylesheet_url, html_css_fetcher_register(), html_default_stylesheet_url, html_quirks_stylesheet_url, html_user_stylesheet_url, NSERROR_OK, and nsurl_create().

Referenced by html_init().

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◆ html_css_new_selection_context()

nserror html_css_new_selection_context	(	struct html_content *	c,
		css_select_ctx **	select_ctx
	)

create a new css selection context for an html content.

Parameters

c	The html content to create css selction on.
select_ctx	A pointer to receive the new context.

Returns: NSERROR_OK on success and select_ctx updated else error code

Definition at line 653 of file css.c.

References css_error_to_nserror(), nscss_get_stylesheet(), NSERROR_CSS_BASE, NSERROR_OK, html_stylesheet::sheet, STYLESHEET_BASE, html_content::stylesheet_count, STYLESHEET_START, STYLESHEET_USER, html_content::stylesheets, and html_stylesheet::unused.

Referenced by html_finish_conversion().

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◆ html_css_new_stylesheets()

nserror html_css_new_stylesheets ( struct html_content * c )

Initialise core stylesheets for a content.

Parameters

c	content structure to update

Returns: NSERROR_OK on success or error code

Definition at line 581 of file css.c.

References content::active, html_content::base, hlcache_child_context::charset, CONTENT_CSS, content_get_url(), html_content::encoding, hlcache_handle_retrieve(), html_adblock_stylesheet_url, html_convert_css_callback(), html_default_stylesheet_url, html_user_stylesheet_url, NSERROR_NOMEM, NSERROR_OK, NSLOG, nsoption_bool, content::quirks, hlcache_child_context::quirks, html_stylesheet::sheet, STYLESHEET_ADBLOCK, STYLESHEET_BASE, html_content::stylesheet_count, STYLESHEET_QUIRKS, STYLESHEET_START, STYLESHEET_USER, and html_content::stylesheets.

Referenced by html_create().

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◆ html_css_process_link()

bool html_css_process_link	(	struct html_content *	htmlc,
		dom_node *	node
	)

process a css stylesheet dom LINK node

Parameters

htmlc	The HTML content.
node	the DOM link node to process.

Returns: true on success else false.

Definition at line 385 of file css.c.

References content::active, html_content::base, html_content::base_url, hlcache_child_context::charset, content_broadcast_error(), CONTENT_CSS, content_get_url(), html_content::encoding, hlcache_handle_retrieve(), html_convert_css_callback(), html_stylesheet::modified, html_stylesheet::node, NSERROR_NOMEM, NSERROR_OK, NSLOG, nsoption_bool, nsurl_access(), nsurl_join(), nsurl_unref(), content::quirks, hlcache_child_context::quirks, html_stylesheet::sheet, strcasestr(), html_content::stylesheet_count, html_content::stylesheets, and html_stylesheet::unused.

Referenced by html_process_inserted_link().

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◆ html_css_process_modified_style()

static bool html_css_process_modified_style	(	html_content *	c,
		struct html_stylesheet *	s
	)

static

Definition at line 262 of file css.c.

References content::active, html_content::base, content_broadcast_error(), content_get_status(), CONTENT_STATUS_DONE, hlcache_handle_abort(), hlcache_handle_release(), html_stylesheet_from_domnode(), html_stylesheet::modified, html_stylesheet::node, NSERROR_OK, NSLOG, and html_stylesheet::sheet.

Referenced by html_css_process_modified_styles().

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◆ html_css_process_modified_styles()

static void html_css_process_modified_styles ( void * pw )

static

process a stylesheet that has been modified.

Definition at line 302 of file css.c.

References guit, html_css_process_modified_style(), html_css_process_modified_styles(), netsurf_table::misc, html_stylesheet::modified, gui_misc_table::schedule, html_content::stylesheet_count, and html_content::stylesheets.

Referenced by html_css_free_stylesheets(), html_css_process_modified_styles(), and html_css_update_style().

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◆ html_css_process_style()

bool html_css_process_style	(	struct html_content *	htmlc,
		dom_node *	node
	)

process a css style dom node

Parameters

htmlc	The HTML content.
node	the DOM node to process.

Returns: true on success else false.

Definition at line 352 of file css.c.

References html_stylesheet::node, strcasestr(), html_content::stylesheet_count, html_content::stylesheets, and html_stylesheet::unused.

Referenced by dom_default_action_DOMNodeInserted_cb().

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◆ html_css_quirks_stylesheets()

nserror html_css_quirks_stylesheets ( struct html_content * c )

Initialise quirk stylesheets for a content.

Parameters

c	content structure to update

Returns: NSERROR_OK on success or error code

Definition at line 552 of file css.c.

References content::active, html_content::base, hlcache_child_context::charset, CONTENT_CSS, content_get_url(), html_content::encoding, hlcache_handle_retrieve(), html_convert_css_callback(), html_quirks_stylesheet_url, NSERROR_OK, NSLOG, content::quirks, html_content::quirks, hlcache_child_context::quirks, html_stylesheet::sheet, STYLESHEET_QUIRKS, and html_content::stylesheets.

Referenced by html_convert().

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◆ html_css_saw_insecure_stylesheets()

bool html_css_saw_insecure_stylesheets ( struct html_content * htmlc )

determine if any of the stylesheets were loaded insecurely

Parameters

htmlc The HTML content to check.

Returns: true if there were insecurely loadd stylesheets else false.

Definition at line 512 of file css.c.

References content_saw_insecure_objects(), html_stylesheet::sheet, and html_content::stylesheets.

Referenced by html_saw_insecure_objects().

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◆ html_css_update_style()

bool html_css_update_style	(	struct html_content *	htmlc,
		dom_node *	node
	)

process a css style dom node update

Parameters

htmlc	The HTML content.
node	the DOM node to process.

Returns: true on success else false.

Definition at line 323 of file css.c.

References guit, html_create_style_element(), html_css_process_modified_styles(), netsurf_table::misc, html_stylesheet::modified, html_stylesheet::node, NSLOG, gui_misc_table::schedule, html_content::stylesheet_count, and html_content::stylesheets.

Referenced by dom_default_action_DOMSubtreeModified_cb().

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◆ html_get_stylesheets()

struct html_stylesheet * html_get_stylesheets	(	struct hlcache_handle *	h,
		unsigned int *	n
	)

Retrieve stylesheets used by HTML document.

Parameters

h	Content to retrieve stylesheets from
n	Pointer to location to receive number of sheets

Returns: Pointer to array of stylesheets

Definition at line 498 of file css.c.

References hlcache_handle_get_content(), html_content::stylesheet_count, and html_content::stylesheets.

Referenced by browser_window_reload(), and save_complete_save_html_stylesheets().

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◆ html_stylesheet_from_domnode()

static nserror html_stylesheet_from_domnode	(	html_content *	c,
		dom_node *	node,
		hlcache_handle **	sheet
	)

static

Definition at line 148 of file css.c.

References content::active, html_content::base, html_content::base_url, hlcache_child_context::charset, CONTENT_CSS, content_get_url(), html_content::encoding, hlcache_handle_retrieve(), html_convert_css_callback(), html_css_fetcher_add_item(), html_stylesheet::node, NSERROR_OK, NSLOG, nsurl_create(), nsurl_unref(), content::quirks, hlcache_child_context::quirks, and html_stylesheet::sheet.

Referenced by html_css_process_modified_style().

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Variable Documentation

◆ html_adblock_stylesheet_url

nsurl* html_adblock_stylesheet_url

static

Definition at line 48 of file css.c.

Referenced by html_css_fini(), html_css_init(), and html_css_new_stylesheets().

◆ html_default_stylesheet_url

nsurl* html_default_stylesheet_url

static

Definition at line 47 of file css.c.

Referenced by html_css_fini(), html_css_init(), and html_css_new_stylesheets().

◆ html_quirks_stylesheet_url

nsurl* html_quirks_stylesheet_url

static

Definition at line 49 of file css.c.

Referenced by html_css_fini(), html_css_init(), and html_css_quirks_stylesheets().

◆ html_user_stylesheet_url

nsurl* html_user_stylesheet_url

static

Definition at line 50 of file css.c.

Referenced by html_css_fini(), html_css_init(), and html_css_new_stylesheets().

Functions

Variables

Detailed Description

Function Documentation

◆ css_error_to_nserror()

◆ html_convert_css_callback()

◆ html_create_style_element()

◆ html_css_fini()

◆ html_css_free_stylesheets()

◆ html_css_init()

◆ html_css_new_selection_context()

◆ html_css_new_stylesheets()

◆ html_css_process_link()

◆ html_css_process_modified_style()

◆ html_css_process_modified_styles()

◆ html_css_process_style()

◆ html_css_quirks_stylesheets()

◆ html_css_saw_insecure_stylesheets()

◆ html_css_update_style()

◆ html_get_stylesheets()

◆ html_stylesheet_from_domnode()

Variable Documentation

◆ html_adblock_stylesheet_url

◆ html_default_stylesheet_url

◆ html_quirks_stylesheet_url

◆ html_user_stylesheet_url