This class provides the glue between HTML parser and CSS subsystem. More...

#include <styleengine.hh>

Classes
struct	Node

Public Member Functions
	StyleEngine (dw::core::Layout layout, const DilloUrl pageUrl, const DilloUrl *baseUrl, float zoom)

	~StyleEngine ()

void	parse (DilloHtml html, DilloUrl url, const char *buf, int buflen, CssOrigin origin)

void	startElement (int tag, BrowserWindow *bw)
	tell the styleEngine that a new html element has started.

void	startElement (const char tagname, BrowserWindow bw)

void	setId (const char *id)

const char *	getId ()

void	setClass (const char *klass)

void	setStyle (const char *style)

void	endElement (int tag)
	tell the styleEngine that a html element has ended.

void	setPseudoLink ()
	set the CSS pseudo class :link.

void	setPseudoVisited ()
	set the CSS pseudo class :visited.

void	setNonCssHint (CssPropertyName name, CssValueType type, int value)

void	setNonCssHint (CssPropertyName name, CssValueType type, const char *value)

void	setNonCssHint (CssPropertyName name, CssValueType type, CssLength value)

void	inheritNonCssHints ()
	Instruct StyleEngine to use the nonCssHints from parent element This is only used for tables where nonCssHints on the TABLE-element (e.g.

void	clearNonCssHints ()

void	restyle (BrowserWindow *bw)
	Recompute all style information from scratch This is used to take into account CSS styles for the HTML-element.

void	inheritBackgroundColor ()
	Use of the background color of the parent style as default.

dw::core::style::Style *	backgroundStyle (BrowserWindow *bw)
	Similar to StyleEngine::style(), but with backgroundColor set.

dw::core::style::Color *	backgroundColor ()

dw::core::style::StyleImage *	backgroundImage (dw::core::style::BackgroundRepeat bgRepeat, dw::core::style::BackgroundAttachment bgAttachment, dw::core::style::Length bgPositionX, dw::core::style::Length bgPositionY)

dw::core::style::Style *	style (BrowserWindow *bw)

dw::core::style::Style *	wordStyle (BrowserWindow *bw)

Static Public Member Functions
static void	init ()
	Create the user agent style.

Private Member Functions
void	stackPush ()

void	stackPop ()

void	buildUserStyle ()

dw::core::style::Style *	style0 (int i, BrowserWindow *bw)
	Create a new style object based on the previously opened / closed HTML elements and the nonCssProperties that have been set.

dw::core::style::Style *	wordStyle0 (BrowserWindow *bw)

void	setNonCssHint (CssPropertyName name, CssValueType type, CssPropertyValue value)

void	preprocessAttrs (dw::core::style::StyleAttrs *attrs)

void	postprocessAttrs (dw::core::style::StyleAttrs *attrs)

void	apply (int i, dw::core::style::StyleAttrs attrs, CssPropertyList props, BrowserWindow *bw)
	Make changes to StyleAttrs attrs according to CssPropertyList props.

bool	computeValue (int dest, CssLength value, dw::core::style::Font font)
	Resolve relative lengths to absolute values.

bool	computeValue (int dest, CssLength value, dw::core::style::Font font, int percentageBase)

bool	computeLength (dw::core::style::Length dest, CssLength value, dw::core::style::Font font)

void	computeBorderWidth (int dest, CssProperty p, dw::core::style::Font *font)

Private Attributes
dw::core::Layout *	layout

lout::misc::SimpleVector< Node > *	stack

CssContext *	cssContext

Doctree *	doctree

int	importDepth

float	dpmm

float	zoom

DilloUrl *	pageUrl

DilloUrl *	baseUrl

Detailed Description

This class provides the glue between HTML parser and CSS subsystem.

It maintains a document tree and creates and caches style objects for use by the HTML parser. The HTML parser in turn informs StyleEngine about opened or closed HTML elements and their attributes via the startElement() / endElement() methods.

Definition at line 32 of file styleengine.hh.

Constructor & Destructor Documentation

◆ StyleEngine()

StyleEngine::StyleEngine	(	dw::core::Layout *	layout,
		const DilloUrl *	pageUrl,
		const DilloUrl *	baseUrl,
		float	zoom
	)

Definition at line 62 of file styleengine.cc.

References a_Url_dup(), dw::core::style::StyleAttrs::backgroundColor, baseUrl, DilloPrefs::bg_color, buildUserStyle(), dw::core::style::StyleAttrs::color, dw::core::style::Font::create(), dw::core::style::Color::create(), dw::core::style::Style::create(), cssContext, doctree, dw::core::Layout::dpiX(), dpmm, dw::core::style::StyleAttrs::font, DilloPrefs::font_factor, DilloPrefs::font_max_size, DilloPrefs::font_min_size, DilloPrefs::font_sans_serif, dw::core::style::FONT_STYLE_NORMAL, dw::core::style::FONT_VARIANT_NORMAL, dw::core::style::FontAttrs::fontVariant, importDepth, dw::core::style::StyleAttrs::initValues(), layout, dw::core::style::FontAttrs::letterSpacing, dw::core::style::FontAttrs::name, pageUrl, prefs, lout::misc::roundInt(), dw::core::style::FontAttrs::size, stack, stackPush(), dw::core::style::FontAttrs::style, StyleEngine::Node::style, dw::core::style::FontAttrs::weight, and zoom.

◆ ~StyleEngine()

StyleEngine::~StyleEngine ( )

Definition at line 102 of file styleengine.cc.

References a_Url_free(), baseUrl, cssContext, doctree, DoctreeNode::element, endElement(), pageUrl, stack, stackPop(), and Doctree::top().

Member Function Documentation

◆ apply()

void StyleEngine::apply	(	int	i,
		dw::core::style::StyleAttrs *	attrs,
		CssPropertyList *	props,
		BrowserWindow *	bw
	)

private

Make changes to StyleAttrs attrs according to CssPropertyList props.

Definition at line 364 of file styleengine.cc.

Referenced by style0().

◆ backgroundColor()

dw::core::style::Color * StyleEngine::backgroundColor ( )

Definition at line 249 of file styleengine.cc.

References dw::core::style::StyleAttrs::backgroundColor, stack, and StyleEngine::Node::style.

Referenced by Html_tag_open_body().

◆ backgroundImage()

dw::core::style::StyleImage * StyleEngine::backgroundImage	(	dw::core::style::BackgroundRepeat *	bgRepeat,
		dw::core::style::BackgroundAttachment *	bgAttachment,
		dw::core::style::Length *	bgPositionX,
		dw::core::style::Length *	bgPositionY
	)

Definition at line 260 of file styleengine.cc.

References dw::core::style::StyleAttrs::backgroundAttachment, dw::core::style::StyleAttrs::backgroundImage, dw::core::style::StyleAttrs::backgroundPositionX, dw::core::style::StyleAttrs::backgroundPositionY, dw::core::style::StyleAttrs::backgroundRepeat, stack, and StyleEngine::Node::style.

Referenced by Html_tag_open_body().

◆ backgroundStyle()

Style * StyleEngine::backgroundStyle ( BrowserWindow * bw )

Similar to StyleEngine::style(), but with backgroundColor set.

A normal style might have backgroundColor == NULL to indicate a transparent background. This method ensures that backgroundColor is set.

Definition at line 900 of file styleengine.cc.

References dw::core::style::StyleAttrs::backgroundColor, dw::core::style::Style::create(), stack, and style().

Referenced by DilloHtml::backgroundStyle().

◆ buildUserStyle()

void StyleEngine::buildUserStyle ( )

private

Definition at line 1081 of file styleengine.cc.

References a_Misc_file2dstr(), CSS_ORIGIN_USER, cssContext, dFree(), dGethomedir(), dStr_free(), dStrconcat(), CssParser::parse(), and style().

Referenced by StyleEngine().

◆ clearNonCssHints()

void StyleEngine::clearNonCssHints ( )

Definition at line 232 of file styleengine.cc.

References StyleEngine::Node::nonCssProperties, and stack.

Referenced by Html_tag_open_table().

◆ computeBorderWidth()

void StyleEngine::computeBorderWidth	(	int *	dest,
		CssProperty *	p,
		dw::core::style::Font *	font
	)

private

Definition at line 874 of file styleengine.cc.

References computeValue(), CSS_BORDER_WIDTH_MEDIUM, CSS_BORDER_WIDTH_THICK, CSS_BORDER_WIDTH_THIN, CSS_TYPE_ENUM, CssPropertyValue::intVal, CssPropertyValue::lenVal, CssProperty::type, and CssProperty::value.

Referenced by apply().

◆ computeLength()

bool StyleEngine::computeLength	(	dw::core::style::Length *	dest,
		CssLength	value,
		dw::core::style::Font *	font
	)

private

Definition at line 856 of file styleengine.cc.

References computeValue(), dw::core::style::createAbsLength(), dw::core::style::createPerLength(), CSS_LENGTH_TYPE(), CSS_LENGTH_TYPE_AUTO, CSS_LENGTH_TYPE_PERCENTAGE, CSS_LENGTH_VALUE(), and dw::core::style::LENGTH_AUTO.

Referenced by apply().

◆ computeValue() [1/2]

bool StyleEngine::computeValue	(	int *	dest,
		CssLength	value,
		dw::core::style::Font *	font
	)

private

Resolve relative lengths to absolute values.

Definition at line 791 of file styleengine.cc.

References CSS_LENGTH_TYPE(), CSS_LENGTH_TYPE_CH, CSS_LENGTH_TYPE_EM, CSS_LENGTH_TYPE_EX, CSS_LENGTH_TYPE_MM, CSS_LENGTH_TYPE_NONE, CSS_LENGTH_TYPE_PX, CSS_LENGTH_TYPE_REM, CSS_LENGTH_TYPE_VH, CSS_LENGTH_TYPE_VMAX, CSS_LENGTH_TYPE_VMIN, CSS_LENGTH_TYPE_VW, CSS_LENGTH_VALUE(), dpmm, dw::core::style::StyleAttrs::font, dw::core::Layout::getHeightViewport(), dw::core::Layout::getWidthViewport(), layout, MAX, MIN, lout::misc::roundInt(), dw::core::style::FontAttrs::size, stack, dw::core::style::Font::xHeight, dw::core::style::Font::zeroWidth, and zoom.

Referenced by apply(), computeBorderWidth(), computeLength(), and computeValue().

◆ computeValue() [2/2]

bool StyleEngine::computeValue	(	int *	dest,
		CssLength	value,
		dw::core::style::Font *	font,
		int	percentageBase
	)

private

Definition at line 847 of file styleengine.cc.

References computeValue(), CSS_LENGTH_TYPE(), CSS_LENGTH_TYPE_PERCENTAGE, CSS_LENGTH_VALUE(), and lout::misc::roundInt().

◆ endElement()

void StyleEngine::endElement ( int tag )

tell the styleEngine that a html element has ended.

Definition at line 299 of file styleengine.cc.

References doctree, DoctreeNode::element, Doctree::pop(), stackPop(), and Doctree::top().

Referenced by Html_real_pop_tag(), Html_tag_open_body(), and ~StyleEngine().

◆ getId()

const char * StyleEngine::getId ( )

inline

Definition at line 93 of file styleengine.hh.

References doctree, DoctreeNode::id, and Doctree::top().

Referenced by Html_process_tag(), and Html_tag_open_a().

◆ inheritBackgroundColor()

void StyleEngine::inheritBackgroundColor ( )

Use of the background color of the parent style as default.

This is only used in table code to allow for colors specified for table rows as table rows are currently no widgets and therefore don't draw any background.

Definition at line 245 of file styleengine.cc.

References lout::misc::SimpleVector< T >::getRef(), and stack.

Referenced by Html_tag_open_a(), Html_tag_open_abbr(), Html_tag_open_default(), Html_tag_open_dir(), Html_tag_open_dl(), Html_tag_open_dt(), Html_tag_open_pre(), Html_tag_open_q(), Html_tag_open_span(), and Html_tag_open_tr().

◆ inheritNonCssHints()

void StyleEngine::inheritNonCssHints ( )

Instruct StyleEngine to use the nonCssHints from parent element This is only used for tables where nonCssHints on the TABLE-element (e.g.

border=1) also affect child elements like TD.

Definition at line 216 of file styleengine.cc.

References CssPropertyList::apply(), StyleEngine::Node::nonCssProperties, and stack.

Referenced by Html_tag_open_table_cell(), and Html_tag_open_tr().

◆ init()

void StyleEngine::init ( )

static

Create the user agent style.

The user agent style defines how dillo renders HTML in the absence of author or user styles.

Definition at line 1020 of file styleengine.cc.

References CSS_ORIGIN_USER_AGENT, and CssParser::parse().

Referenced by main().

◆ parse()

void StyleEngine::parse	(	DilloHtml *	html,
		DilloUrl *	url,
		const char *	buf,
		int	buflen,
		CssOrigin	origin
	)

Definition at line 1002 of file styleengine.cc.

References cssContext, importDepth, MSG_WARN, and CssParser::parse().

Referenced by a_Html_load_stylesheet(), and Html_tag_close_style().

◆ postprocessAttrs()

void StyleEngine::postprocessAttrs ( dw::core::style::StyleAttrs * attrs )

private

Definition at line 335 of file styleengine.cc.

References dw::core::style::BORDER_HIDDEN, dw::core::style::BORDER_NONE, dw::core::style::StyleAttrs::borderColor, dw::core::style::StyleAttrs::borderStyle, dw::core::style::StyleAttrs::borderWidth, dw::core::style::Box::bottom, dw::core::style::StyleAttrs::bottom, dw::core::style::StyleAttrs::color, dw::core::style::Box::left, dw::core::style::StyleAttrs::left, dw::core::style::Box::right, dw::core::style::StyleAttrs::right, dw::core::style::Box::top, and dw::core::style::StyleAttrs::top.

Referenced by style0().

◆ preprocessAttrs()

void StyleEngine::preprocessAttrs ( dw::core::style::StyleAttrs * attrs )

private

◆ restyle()

void StyleEngine::restyle ( BrowserWindow * bw )

Recompute all style information from scratch This is used to take into account CSS styles for the HTML-element.

The CSS data is only completely available after parsing the HEAD-section and thereby after the HTML-element has been opened. Note that restyle() does not change any styles in the widget tree.

Definition at line 982 of file styleengine.cc.

References StyleEngine::Node::backgroundStyle, stack, StyleEngine::Node::style, style0(), dw::core::style::Style::unref(), and StyleEngine::Node::wordStyle.

Referenced by DilloHtml::restyle().