#include <string.h>
#include <strings.h>
#include "utils/nsoption.h"
#include "utils/corestrings.h"
#include "utils/log.h"
#include "utils/nsurl.h"
#include "utils/utils.h"
#include "css/hints.h"
#include "css/select.h"

Include dependency graph for hints.c:

Data Structures
struct	colour_map
	Mapping of colour name to CSS color. More...

struct	css_hint_ctx

Macros
#define	LOG_STATS

#define	MAX_HINTS_PER_ELEMENT 32

Functions
static bool	isWhitespace (char c)
	Determine if a given character is whitespace. More...

static bool	isHex (char c)
	Determine if a given character is a valid hex digit. More...

static uint8_t	charToHex (char c)
	Convert a character representing a hex digit to the corresponding hex value. More...

static bool	parse_number (const char data, bool maybe_negative, bool real, css_fixed value, size_t *consumed)
	Parse a number string. More...

static bool	parse_dimension (const char data, bool strict, css_fixed length, css_unit *unit)
	Parse a dimension string. More...

static int	cmp_colour_name (const void a, const void b)
	Name comparator for named colour matching. More...

static bool	parse_named_colour (const char name, css_color result)
	Parse a named colour. More...

bool	nscss_parse_colour (const char data, css_color result)
	Parser for colours specified in attribute values. More...

static bool	parse_font_size (const char size, uint8_t val, css_fixed len, css_unit unit)
	Parse a font @size attribute. More...

nserror	css_hint_init (void)

void	css_hint_fini (void)

static void	css_hint_clean (void)

static void	css_hint_advance (struct css_hint **hint)

static void	css_hint_get_hints (struct css_hint *hints, uint32_t nhints)

static void	css_hint_table_cell_border_padding (nscss_select_ctx ctx, dom_node node)

static void	css_hint_vertical_align_table_cells (nscss_select_ctx ctx, dom_node node)

static void	css_hint_vertical_align_replaced (nscss_select_ctx ctx, dom_node node)

static void	css_hint_text_align_normal (nscss_select_ctx ctx, dom_node node)

static void	css_hint_text_align_center (nscss_select_ctx ctx, dom_node node)

static void	css_hint_margin_left_right_align_center (nscss_select_ctx ctx, dom_node node)

static void	css_hint_text_align_special (nscss_select_ctx ctx, dom_node node)

static void	css_hint_text_align_table_special (nscss_select_ctx ctx, dom_node node)

static void	css_hint_margin_hspace_vspace (nscss_select_ctx ctx, dom_node node)

static void	css_hint_margin_left_right_hr (nscss_select_ctx ctx, dom_node node)

static void	css_hint_table_spacing_border (nscss_select_ctx ctx, dom_node node)

static void	css_hint_height (nscss_select_ctx ctx, dom_node node)

static void	css_hint_width (nscss_select_ctx ctx, dom_node node)

static void	css_hint_height_width_textarea (nscss_select_ctx ctx, dom_node node)

static void	css_hint_height_width_canvas (nscss_select_ctx ctx, dom_node node)

static void	css_hint_width_input (nscss_select_ctx ctx, dom_node node)

static void	css_hint_anchor_color (nscss_select_ctx ctx, dom_node node)

static void	css_hint_body_color (nscss_select_ctx ctx, dom_node node)

static void	css_hint_color (nscss_select_ctx ctx, dom_node node)

static void	css_hint_font_size (nscss_select_ctx ctx, dom_node node)

static void	css_hint_float (nscss_select_ctx ctx, dom_node node)

static void	css_hint_caption_side (nscss_select_ctx ctx, dom_node node)

static void	css_hint_bg_color (nscss_select_ctx ctx, dom_node node)

static void	css_hint_bg_image (nscss_select_ctx ctx, dom_node node)

static void	css_hint_white_space_nowrap (nscss_select_ctx ctx, dom_node node)

static void	css_hint_list (nscss_select_ctx ctx, dom_node node)

css_error	node_presentational_hint (void pw, void node, uint32_t nhints, css_hint *hints)
	Callback to retrieve presentational hints for a node. More...

Variables
struct css_hint_ctx	hint_ctx

Macro Definition Documentation

◆ LOG_STATS

#define LOG_STATS

Definition at line 31 of file hints.c.

◆ MAX_HINTS_PER_ELEMENT

#define MAX_HINTS_PER_ELEMENT 32

Definition at line 579 of file hints.c.

Function Documentation

◆ charToHex()

static uint8_t charToHex ( char c )

static

Convert a character representing a hex digit to the corresponding hex value.

Parameters

c	Character to convert

Returns: Hex value represented by character

Note: This function assumes an ASCII-compatible character set

Definition at line 69 of file hints.c.

Referenced by nscss_parse_colour().

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◆ cmp_colour_name()

static int cmp_colour_name	(	const void *	a,
		const void *	b
	)

static

Name comparator for named colour matching.

Parameters

a	Name to match
b	Colour map entry to consider

Returns: 0 on match, < 0 if a < b, > 0 if b > a.

Definition at line 266 of file hints.c.

References colour_map::name.

Referenced by parse_named_colour().

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◆ css_hint_advance()

static void css_hint_advance ( struct css_hint ** hint )

inlinestatic

Definition at line 610 of file hints.c.

References hint_ctx, css_hint_ctx::len, and MAX_HINTS_PER_ELEMENT.

Referenced by css_hint_anchor_color(), css_hint_bg_color(), css_hint_bg_image(), css_hint_body_color(), css_hint_caption_side(), css_hint_color(), css_hint_float(), css_hint_font_size(), css_hint_height(), css_hint_height_width_canvas(), css_hint_height_width_textarea(), css_hint_list(), css_hint_margin_hspace_vspace(), css_hint_margin_left_right_align_center(), css_hint_margin_left_right_hr(), css_hint_table_cell_border_padding(), css_hint_table_spacing_border(), css_hint_text_align_center(), css_hint_text_align_normal(), css_hint_text_align_special(), css_hint_text_align_table_special(), css_hint_vertical_align_replaced(), css_hint_vertical_align_table_cells(), css_hint_white_space_nowrap(), css_hint_width(), and css_hint_width_input().

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◆ css_hint_anchor_color()

static void css_hint_anchor_color	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1348 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, named_ancestor_node(), node_is_visited(), and nscss_parse_colour().

Referenced by node_presentational_hint().

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◆ css_hint_bg_color()

static void css_hint_bg_color	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1512 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and nscss_parse_colour().

Referenced by node_presentational_hint().

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◆ css_hint_bg_image()

static void css_hint_bg_image	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1534 of file hints.c.

References nscss_select_ctx::base_url, css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, NSERROR_OK, nsurl_access(), nsurl_join(), nsurl_length(), and nsurl_unref().

Referenced by node_presentational_hint().

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◆ css_hint_body_color()

static void css_hint_body_color	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1400 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and nscss_parse_colour().

Referenced by node_presentational_hint().

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◆ css_hint_caption_side()

static void css_hint_caption_side	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1492 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_clean()

static void css_hint_clean ( void )

static

Definition at line 605 of file hints.c.

References hint_ctx, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_color()

static void css_hint_color	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1422 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and nscss_parse_colour().

Referenced by node_presentational_hint().

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◆ css_hint_fini()

void css_hint_fini ( void )

Definition at line 599 of file hints.c.

References hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by nscss_fini().

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◆ css_hint_float()

static void css_hint_float	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1466 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_font_size()

static void css_hint_font_size	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1444 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_font_size().

Referenced by node_presentational_hint().

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◆ css_hint_get_hints()

static void css_hint_get_hints	(	struct css_hint **	hints,
		uint32_t *	nhints
	)

static

Definition at line 618 of file hints.c.

References hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_height()

static void css_hint_height	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1147 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_height_width_canvas()

static void css_hint_height_width_canvas	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1236 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_height_width_textarea()

static void css_hint_height_width_textarea	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1195 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_init()

nserror css_hint_init ( void )

Definition at line 588 of file hints.c.

References hint_ctx, css_hint_ctx::hints, MAX_HINTS_PER_ELEMENT, NSERROR_NOMEM, and NSERROR_OK.

Referenced by nscss_init().

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◆ css_hint_list()

static void css_hint_list	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1582 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and type.

Referenced by node_presentational_hint().

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◆ css_hint_margin_hspace_vspace()

static void css_hint_margin_hspace_vspace	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 959 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_margin_left_right_align_center()

static void css_hint_margin_left_right_align_center	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 875 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_margin_left_right_hr()

static void css_hint_margin_left_right_hr	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1016 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_table_cell_border_padding()

static void css_hint_table_cell_border_padding	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 629 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, named_ancestor_node(), nscss_parse_colour(), and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_table_spacing_border()

static void css_hint_table_spacing_border	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1067 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, nscss_parse_colour(), and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_text_align_center()

static void css_hint_text_align_center	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 864 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_text_align_normal()

static void css_hint_text_align_normal	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 825 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_text_align_special()

static void css_hint_text_align_special	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 908 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_text_align_table_special()

static void css_hint_text_align_table_special	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 948 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_vertical_align_replaced()

static void css_hint_vertical_align_replaced	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 781 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_vertical_align_table_cells()

static void css_hint_vertical_align_table_cells	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 739 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_white_space_nowrap()

static void css_hint_white_space_nowrap	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1566 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, and css_hint_ctx::len.

Referenced by node_presentational_hint().

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◆ css_hint_width()

static void css_hint_width	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1171 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_dimension().

Referenced by node_presentational_hint().

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◆ css_hint_width_input()

static void css_hint_width_input	(	nscss_select_ctx *	ctx,
		dom_node *	node
	)

static

Definition at line 1298 of file hints.c.

References css_hint_advance(), hint_ctx, css_hint_ctx::hints, css_hint_ctx::len, and parse_dimension().

Referenced by node_presentational_hint().

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◆ isHex()

static bool isHex ( char c )

static

Determine if a given character is a valid hex digit.

Parameters

c	Character to consider

Returns: true if character is a valid hex digit, false otherwise

Definition at line 55 of file hints.c.

Referenced by nscss_parse_colour().

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◆ isWhitespace()

static bool isWhitespace ( char c )

static

Determine if a given character is whitespace.

Parameters

c	Character to consider

Returns: true if character is whitespace, false otherwise

Definition at line 44 of file hints.c.

Referenced by parse_font_size(), and parse_number().

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◆ node_presentational_hint()

css_error node_presentational_hint	(	void *	pw,
		void *	node,
		uint32_t *	nhints,
		css_hint **	hints
	)

Callback to retrieve presentational hints for a node.

Parameters

[in]	pw	HTML document
[in]	node	DOM node
[out]	nhints	number of hints retrieved
[out]	hints	retrieved hints

Returns: CSS_OK on success, CSS_PROPERTY_NOT_SET if there is no hint for the requested property, CSS_NOMEM on memory exhaustion.

Definition at line 1628 of file hints.c.

References css_hint_anchor_color(), css_hint_bg_color(), css_hint_bg_image(), css_hint_body_color(), css_hint_caption_side(), css_hint_clean(), css_hint_color(), css_hint_float(), css_hint_font_size(), css_hint_get_hints(), css_hint_height(), css_hint_height_width_canvas(), css_hint_height_width_textarea(), css_hint_list(), css_hint_margin_hspace_vspace(), css_hint_margin_left_right_align_center(), css_hint_margin_left_right_hr(), css_hint_table_cell_border_padding(), css_hint_table_spacing_border(), css_hint_text_align_center(), css_hint_text_align_normal(), css_hint_text_align_special(), css_hint_text_align_table_special(), css_hint_vertical_align_replaced(), css_hint_vertical_align_table_cells(), css_hint_white_space_nowrap(), css_hint_width(), css_hint_width_input(), fallthrough, hint_ctx, css_hint_ctx::len, NSLOG, and nsoption_bool.

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◆ nscss_parse_colour()

bool nscss_parse_colour	(	const char *	data,
		css_color *	result
	)

Parser for colours specified in attribute values.

Parameters

data	Data to parse (NUL-terminated)
result	Pointer to location to receive resulting css_color

Returns: true on success, false on invalid input

Todo:: Implement HTML5's utterly insane legacy colour parsing

Definition at line 449 of file hints.c.

References charToHex(), isHex(), parse_named_colour(), result, and SLEN.

Referenced by box_create_frameset(), box_iframe(), css_hint_anchor_color(), css_hint_bg_color(), css_hint_body_color(), css_hint_color(), css_hint_table_cell_border_padding(), and css_hint_table_spacing_border().

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◆ parse_dimension()

static bool parse_dimension	(	const char *	data,
		bool	strict,
		css_fixed *	length,
		css_unit *	unit
	)

static

Parse a dimension string.

Parameters

data	Data to parse (NUL-terminated)
strict	Whether to enforce strict parsing rules
length	Pointer to location to receive dimension's length
unit	Pointer to location to receive dimension's unit

Returns: true on success, false on invalid input

Definition at line 224 of file hints.c.

References parse_number().

Referenced by css_hint_height(), css_hint_height_width_canvas(), css_hint_height_width_textarea(), css_hint_margin_hspace_vspace(), css_hint_table_cell_border_padding(), css_hint_table_spacing_border(), css_hint_width(), and css_hint_width_input().

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◆ parse_font_size()

static bool parse_font_size	(	const char *	size,
		uint8_t *	val,
		css_fixed *	len,
		css_unit *	unit
	)

static

Parse a font @size attribute.

Parameters

size	Data to parse (NUL-terminated)
val	Pointer to location to receive enum value
len	Pointer to location to receive length
unit	Pointer to location to receive unit

Returns: True on success, false on failure

Definition at line 509 of file hints.c.

References isWhitespace(), mode, and nsoption_int.

Referenced by css_hint_font_size().

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◆ parse_named_colour()

static bool parse_named_colour	(	const char *	name,
		css_color *	result
	)

static

Parse a named colour.

Parameters

name	Name to parse
result	Pointer to location to receive css_color

Returns: true on success, false on invalid input

Definition at line 281 of file hints.c.

References cmp_colour_name(), colour_map::color, colour_map::name, and result.

Referenced by nscss_parse_colour().

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◆ parse_number()

static bool parse_number	(	const char *	data,
		bool	maybe_negative,
		bool	real,
		css_fixed *	value,
		size_t *	consumed
	)

static

Parse a number string.

Parameters

data	Data to parse (NUL-terminated)
maybe_negative	Negative numbers permitted
real	Floating point numbers permitted
value	Pointer to location to receive numeric value
consumed	Pointer to location to receive number of input bytes consumed

Returns: true on success, false on invalid input

Definition at line 101 of file hints.c.

References isWhitespace().

Referenced by parse_dimension().

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Variable Documentation

◆ hint_ctx

struct css_hint_ctx hint_ctx

Definition at line 586 of file hints.c.

Referenced by css_hint_advance(), css_hint_anchor_color(), css_hint_bg_color(), css_hint_bg_image(), css_hint_body_color(), css_hint_caption_side(), css_hint_clean(), css_hint_color(), css_hint_fini(), css_hint_float(), css_hint_font_size(), css_hint_get_hints(), css_hint_height(), css_hint_height_width_canvas(), css_hint_height_width_textarea(), css_hint_init(), css_hint_list(), css_hint_margin_hspace_vspace(), css_hint_margin_left_right_align_center(), css_hint_margin_left_right_hr(), css_hint_table_cell_border_padding(), css_hint_table_spacing_border(), css_hint_text_align_center(), css_hint_text_align_normal(), css_hint_text_align_special(), css_hint_text_align_table_special(), css_hint_vertical_align_replaced(), css_hint_vertical_align_table_cells(), css_hint_white_space_nowrap(), css_hint_width(), css_hint_width_input(), and node_presentational_hint().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ LOG_STATS

◆ MAX_HINTS_PER_ELEMENT

Function Documentation

◆ charToHex()

◆ cmp_colour_name()

◆ css_hint_advance()

◆ css_hint_anchor_color()

◆ css_hint_bg_color()

◆ css_hint_bg_image()

◆ css_hint_body_color()

◆ css_hint_caption_side()

◆ css_hint_clean()

◆ css_hint_color()

◆ css_hint_fini()

◆ css_hint_float()

◆ css_hint_font_size()

◆ css_hint_get_hints()

◆ css_hint_height()

◆ css_hint_height_width_canvas()

◆ css_hint_height_width_textarea()

◆ css_hint_init()

◆ css_hint_list()

◆ css_hint_margin_hspace_vspace()

◆ css_hint_margin_left_right_align_center()

◆ css_hint_margin_left_right_hr()

◆ css_hint_table_cell_border_padding()

◆ css_hint_table_spacing_border()

◆ css_hint_text_align_center()

◆ css_hint_text_align_normal()

◆ css_hint_text_align_special()

◆ css_hint_text_align_table_special()

◆ css_hint_vertical_align_replaced()

◆ css_hint_vertical_align_table_cells()

◆ css_hint_white_space_nowrap()

◆ css_hint_width()

◆ css_hint_width_input()

◆ isHex()

◆ isWhitespace()

◆ node_presentational_hint()

◆ nscss_parse_colour()

◆ parse_dimension()

◆ parse_font_size()

◆ parse_named_colour()

◆ parse_number()

Variable Documentation

◆ hint_ctx