css.c File Reference

#include <string.h>
#include <assert.h>
#include <libwapcaplet/libwapcaplet.h>
#include <dom/dom.h>
#include "utils/errors.h"
#include "utils/corestrings.h"
#include "utils/utils.h"
#include "utils/http.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "content/content_protected.h"
#include "content/content_factory.h"
#include "content/fetch.h"
#include "content/hlcache.h"
#include "desktop/system_colour.h"
#include "css/css.h"
#include "css/hints.h"
#include "css/internal.h"

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Data Structures
struct	content_css_data
	CSS content data. More...
struct	nscss_content
	CSS content data. More...
struct	nscss_import_ctx
	Context for import fetches. More...

Typedefs
typedef void(*	nscss_done_callback) (struct content_css_data *css, void *pw)
	Type of callback called when a CSS object has finished. More...
typedef struct nscss_content	nscss_content
	CSS content data. More...

Functions
static bool	nscss_convert (struct content *c)
	Convert a CSS content ready for use. More...
static void	nscss_destroy (struct content *c)
	Clean up a CSS content. More...
static nserror	nscss_clone (const struct content *old, struct content **newc)
static bool	nscss_matches_quirks (const struct content *c, bool quirks)
static content_type	nscss_content_type (void)
	Compute the type of a content. More...
static nserror	nscss_create_css_data (struct content_css_data *c, const char *url, const char *charset, bool quirks, nscss_done_callback done, void *pw)
	Create a struct content_css_data, creating a stylesheet object. More...
static css_error	nscss_process_css_data (struct content_css_data *c, const char *data, unsigned int size)
	Process CSS data. More...
static css_error	nscss_convert_css_data (struct content_css_data *c)
	Convert CSS data ready for use. More...
static void	nscss_destroy_css_data (struct content_css_data *c)
	Clean up CSS data. More...
static void	nscss_content_done (struct content_css_data *css, void *pw)
	Handle notification that a CSS object is done. More...
static css_error	nscss_handle_import (void *pw, css_stylesheet *parent, lwc_string *url)
	Handle notification of the need for an imported stylesheet. More...
static nserror	nscss_import (hlcache_handle *handle, const hlcache_event *event, void *pw)
	Handler for imported stylesheet events. More...
static css_error	nscss_import_complete (nscss_import_ctx *ctx)
	Handle an imported stylesheet completing. More...
static css_error	nscss_register_imports (struct content_css_data *c)
	Register imports with a stylesheet. More...
static css_error	nscss_register_import (struct content_css_data *c, const hlcache_handle *import)
	Register an import with a stylesheet. More...
static nserror	nscss_create (const content_handler *handler, lwc_string *imime_type, const http_parameter *params, llcache_handle *llcache, const char *fallback_charset, bool quirks, struct content **c)
	Initialise a CSS content. More...
static bool	nscss_process_data (struct content *c, const char *data, unsigned int size)
	Process CSS source data. More...
css_stylesheet *	nscss_get_stylesheet (struct hlcache_handle *h)
	Retrieve the stylesheet object associated with a CSS content. More...
struct nscss_import *	nscss_get_imports (hlcache_handle *h, uint32_t *n)
	Retrieve imported stylesheets. More...
static void	nscss_fini (void)
	Clean up after the CSS content handler. More...
nserror	nscss_init (void)
	Initialise the CSS content handler. More...

Variables
css_fixed	nscss_screen_dpi = F_90
	Screen DPI in fixed point units: defaults to 90, which RISC OS uses. More...
static css_stylesheet *	blank_import
static const content_handler	css_content_handler

Typedef Documentation

nscss_content

typedef struct nscss_content nscss_content

CSS content data.

nscss_done_callback

typedef void(* nscss_done_callback) (struct content_css_data *css, void *pw)

Type of callback called when a CSS object has finished.

Parameters

css	CSS object that has completed
pw	Client-specific data

Definition at line 54 of file css.c.

Function Documentation

nscss_clone()

nserror nscss_clone ( const struct content *  old, struct content **  newc  )

static

Definition at line 378 of file css.c.

References nscss_content::base, content_css_data::charset, content__clone(), content__get_source_data(), content_destroy(), content_get_url(), CONTENT_STATUS_DONE, CONTENT_STATUS_READY, nscss_content::data, nscss_content_done(), nscss_convert(), nscss_create_css_data(), nscss_process_data(), NSERROR_CLONE_FAILED, NSERROR_NOMEM, NSERROR_OK, nsurl_access(), content::quirks, content::size, and content::status.

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nscss_content_done()

void nscss_content_done ( struct content_css_data *  css, void *  pw  )

static

Handle notification that a CSS object is done.

Parameters

css	CSS object
pw	Private data

Definition at line 479 of file css.c.

References nscss_import::c, content_broadcast_error(), content_set_done(), content_set_error(), content_set_ready(), hlcache_handle_get_content(), content_css_data::import_count, content_css_data::imports, NSERROR_CSS, content_css_data::sheet, and content::size.

Referenced by nscss_clone(), and nscss_create().

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nscss_content_type()

content_type nscss_content_type ( void  )

static

Compute the type of a content.

Returns

CONTENT_CSS

Definition at line 464 of file css.c.

References CONTENT_CSS.

nscss_convert()

bool nscss_convert ( struct content *  c )

static

Convert a CSS content ready for use.

Parameters

c	Content to convert

Returns

true on success, false on failure

Definition at line 287 of file css.c.

References content_broadcast_error(), nscss_content::data, nscss_convert_css_data(), and NSERROR_CSS.

Referenced by nscss_clone().

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nscss_convert_css_data()

static css_error nscss_convert_css_data ( struct content_css_data *  c )

static

Convert CSS data ready for use.

Parameters

c	CSS data to convert

Returns

CSS error

Definition at line 307 of file css.c.

References content_css_data::done, content_css_data::next_to_register, nscss_register_imports(), NSLOG, content_css_data::pw, and content_css_data::sheet.

Referenced by nscss_convert().

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nscss_create()

static nserror nscss_create ( const content_handler *  handler, lwc_string *  imime_type, const http_parameter *  params, llcache_handle *  llcache, const char *  fallback_charset, bool  quirks, struct content **  c  )

static

Initialise a CSS content.

Parameters

handler	content handler
imime_type	mime-type
params	Content-Type parameters
llcache	handle to content
fallback_charset	The character set to fallback to.
quirks	allow quirks
c	Content to initialise

Returns

NSERROR_OK or error cod eon faliure

Todo:

libcss will take this as gospel, which is wrong

Definition at line 131 of file css.c.

References content_css_data::charset, content__init(), content_broadcast_error(), content_get_url(), http_parameter_list_find_item(), llcache, llcache_handle_get_header(), nscss_content_done(), nscss_create_css_data(), NSERROR_NOMEM, NSERROR_OK, nsurl_access(), and result.

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nscss_create_css_data()

static nserror nscss_create_css_data ( struct content_css_data *  c, const char *  url, const char *  charset, bool  quirks, nscss_done_callback  done, void *  pw  )

static

Create a struct content_css_data, creating a stylesheet object.

Parameters

c	Struct to populate
url	URL of stylesheet
charset	Stylesheet charset
quirks	Stylesheet quirks mode
done	Callback to call when content has completed
pw	Client data for done

Returns

NSERROR_OK on success, NSERROR_NOMEM on memory exhaustion

Definition at line 203 of file css.c.

References content_css_data::charset, content_css_data::done, content_css_data::import_count, content_css_data::imports, content_css_data::next_to_register, ns_system_colour(), nscss_handle_import(), nscss_resolve_url(), NSERROR_NOMEM, NSERROR_OK, content_css_data::pw, content::quirks, and content_css_data::sheet.

Referenced by nscss_clone(), and nscss_create().

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nscss_destroy()

void nscss_destroy ( struct content *  c )

static

Clean up a CSS content.

Parameters

c	Content to clean up

Definition at line 345 of file css.c.

References nscss_content::data, and nscss_destroy_css_data().

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nscss_destroy_css_data()

static void nscss_destroy_css_data ( struct content_css_data *  c )

static

Clean up CSS data.

Parameters

c	CSS data to clean up

Definition at line 357 of file css.c.

References nscss_import::c, content_css_data::charset, hlcache_handle_release(), content_css_data::import_count, content_css_data::imports, and content_css_data::sheet.

Referenced by nscss_destroy().

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nscss_fini()

static void nscss_fini ( void  )

static

Clean up after the CSS content handler.

Definition at line 794 of file css.c.

References blank_import, and css_hint_fini().

Referenced by nscss_init().

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nscss_get_imports()

struct nscss_import * nscss_get_imports	(	struct hlcache_handle *	h,
		uint32_t *	n
	)

Retrieve imported stylesheets.

Parameters

h	Stylesheet containing imports
n	Pointer to location to receive number of imports

Returns

Pointer to array of imported stylesheets

Definition at line 447 of file css.c.

References nscss_import::c, and hlcache_handle_get_content().

Referenced by save_complete_save_stylesheet().

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nscss_get_stylesheet()

css_stylesheet * nscss_get_stylesheet

(

struct hlcache_handle *

h

)

Retrieve the stylesheet object associated with a CSS content.

Parameters

h	Stylesheet content

Returns

Pointer to stylesheet object

Definition at line 437 of file css.c.

References nscss_content::data, hlcache_handle_get_content(), and content_css_data::sheet.

Referenced by html_css_new_selection_context().

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nscss_handle_import()

css_error nscss_handle_import ( void *  pw, css_stylesheet *  parent, lwc_string *  url  )

static

Handle notification of the need for an imported stylesheet.

Parameters

pw	CSS object requesting the import
parent	Stylesheet requesting the import
url	URL of the imported sheet

Returns

CSS_OK on success, appropriate error otherwise

Todo:

fallback charset

Todo:

Why aren't we getting a relative url part, to join?

Todo:

Constructing nsurl for referer here is silly, avoid

Definition at line 524 of file css.c.

References nscss_import::c, hlcache_child_context::charset, CONTENT_CSS, nscss_import_ctx::css, hlcache_handle_retrieve(), nscss_import_ctx::index, NSERROR_OK, NSLOG, nsurl_compare(), NSURL_COMPLETE, nsurl_create(), nsurl_unref(), parent, content_css_data::pw, and hlcache_child_context::quirks.

Referenced by nscss_create_css_data().

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nscss_import()

nserror nscss_import ( hlcache_handle *  handle, const hlcache_event *  event, void *  pw  )

static

Handler for imported stylesheet events.

Parameters

handle	Handle for stylesheet
event	Event object
pw	Callback context

Returns

NSERROR_OK on success, appropriate error otherwise

Definition at line 626 of file css.c.

References nscss_import::c, CONTENT_MSG_DONE, CONTENT_MSG_ERROR, nscss_import_ctx::css, hlcache_handle_release(), content_css_data::imports, nscss_import_ctx::index, nscss_import_complete(), NSERROR_NOMEM, NSERROR_OK, NSLOG, and hlcache_event::type.

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nscss_import_complete()

css_error nscss_import_complete ( nscss_import_ctx *  ctx )

static

Handle an imported stylesheet completing.

Parameters

ctx	Import context

Returns

CSS_OK on success, appropriate error otherwise

Definition at line 664 of file css.c.

References nscss_import_ctx::css, nscss_import_ctx::index, content_css_data::next_to_register, nscss_register_imports(), and NSLOG.

Referenced by nscss_import().

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nscss_init()

nserror nscss_init

(

void

)

Initialise the CSS content handler.

Returns

NSERROR_OK on success or error code on faliure

Definition at line 816 of file css.c.

References content_factory_register_handler(), css_content_handler, css_hint_init(), nscss_fini(), and NSERROR_OK.

Referenced by netsurf_init().

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nscss_matches_quirks()

bool nscss_matches_quirks ( const struct content *  c, bool  quirks  )

static

Definition at line 431 of file css.c.

References content::quirks.

nscss_process_css_data()

static css_error nscss_process_css_data ( struct content_css_data *  c, const char *  data, unsigned int  size  )

static

Process CSS data.

Parameters

c	CSS content object
data	Data to process
size	Number of bytes to process

Returns

CSS_OK on success, appropriate error otherwise

Definition at line 274 of file css.c.

References content_css_data::sheet, and content::size.

Referenced by nscss_process_data().

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nscss_process_data()

static bool nscss_process_data ( struct content *  c, const char *  data, unsigned int  size  )

static

Process CSS source data.

Parameters

c	Content structure
data	Data to process
size	Number of bytes to process

Returns

true on success, false on failure

Definition at line 253 of file css.c.

References content_broadcast_error(), nscss_content::data, nscss_process_css_data(), NSERROR_CSS, and content::size.

Referenced by nscss_clone().

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nscss_register_import()

css_error nscss_register_import ( struct content_css_data *  c, const hlcache_handle *  import  )

static

Register an import with a stylesheet.

Parameters

c	CSS object that requested the import
import	Cache handle of import, or NULL for blank

Returns

CSS_OK on success, appropriate error otherwise

Definition at line 737 of file css.c.

References blank_import, nscss_import::c, nscss_content::data, hlcache_handle_get_content(), ns_system_colour(), nscss_resolve_url(), and content_css_data::sheet.

Referenced by nscss_register_imports().

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nscss_register_imports()

css_error nscss_register_imports ( struct content_css_data *  c )

static

Register imports with a stylesheet.

Parameters

c	CSS object containing the imports

Returns

CSS_OK on success, appropriate error otherwise

Definition at line 693 of file css.c.

References nscss_import::c, content_get_status(), CONTENT_STATUS_DONE, nscss_register_import(), and hlcache_handle::pw.

Referenced by nscss_convert_css_data(), and nscss_import_complete().

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Variable Documentation

blank_import

css_stylesheet* blank_import

static

Definition at line 115 of file css.c.

Referenced by nscss_fini(), and nscss_register_import().

css_content_handler

const content_handler css_content_handler

static

Initial value:

= {
        .fini = nscss_fini,
        .create = nscss_create,
        .process_data = nscss_process_data,
        .data_complete = nscss_convert,
        .destroy = nscss_destroy,
        .clone = nscss_clone,
        .matches_quirks = nscss_matches_quirks,
        .type = nscss_content_type,
        .no_share = false,
}

Definition at line 803 of file css.c.

Referenced by nscss_init().

nscss_screen_dpi

css_fixed nscss_screen_dpi = F_90

Screen DPI in fixed point units: defaults to 90, which RISC OS uses.

DPI of the screen, in fixed point units.

Definition at line 44 of file css.c.

Referenced by browser_get_dpi(), browser_set_dpi(), html_get_dimensions(), page_info__measure_text_entry(), textarea_create(), textarea_setup_text_offsets(), textplain_line_height(), and treeview_init().