cssstyleselector.cpp

来自「konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版」· C++ 代码 · 共 1,879 行 · 第 1/5 页

/**
 * This file is part of the CSS implementation for KDE.
 *
 * Copyright (C) 1999-2003 Lars Knoll ([e-mail])
 *           (C) 2003-2004 Apple Computer, Inc.
 *           (C) 2004-2005 Allan Sandfeld Jensen ([e-mail])
 *           (C) 2004 Germain Garand ([e-mail])
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "css/cssstyleselector.h"
#include "rendering/render_style.h"
#include "css/css_stylesheetimpl.h"
#include "css/css_ruleimpl.h"
#include "css/css_valueimpl.h"
#include "css/csshelper.h"
#include "rendering/render_object.h"
#include "html/html_documentimpl.h"
#include "html/html_elementimpl.h"
#include "xml/dom_elementimpl.h"
#include "dom/css_rule.h"
#include "dom/css_value.h"
#include "khtml_factory.h"
#include "khtmlpart_p.h"
using namespace khtml;
using namespace DOM;

#include "css/cssproperties.h"
#include "css/cssvalues.h"

#include "misc/khtmllayout.h"
#include "khtml_settings.h"
#include "misc/htmlhashes.h"
#include "misc/helper.h"
#include "misc/loader.h"

#include "rendering/font.h"

#include "khtmlview.h"
#include "khtml_part.h"

#include <kstandarddirs.h>
#include <kcharsets.h>
#include <kglobal.h>
#include <kconfig.h>
#include <qfile.h>
#include <qvaluelist.h>
#include <qstring.h>
#include <qtooltip.h>
#include <kdebug.h>
#include <kurl.h>
#include <assert.h>
#include <qpaintdevicemetrics.h>
#include <stdlib.h>

#define HANDLE_INHERIT(prop, Prop) \
if (isInherit) \
{\
    style->set##Prop(parentStyle->prop());\
    return;\
}

#define HANDLE_INHERIT_AND_INITIAL(prop, Prop) \
HANDLE_INHERIT(prop, Prop) \
else if (isInitial) \
{\
    style->set##Prop(RenderStyle::initial##Prop());\
    return;\
}

#define HANDLE_INHERIT_AND_INITIAL_WITH_VALUE(prop, Prop, Value) \
HANDLE_INHERIT(prop, Prop) \
else if (isInitial) \
{\
    style->set##Prop(RenderStyle::initial##Value());\
    return;\
}

#define HANDLE_BACKGROUND_INHERIT_AND_INITIAL(prop, Prop) \
if (isInherit) { \
    BackgroundLayer* currChild = style->accessBackgroundLayers(); \
    BackgroundLayer* prevChild = 0; \
    const BackgroundLayer* currParent = parentStyle->backgroundLayers(); \
    while (currParent && currParent->is##Prop##Set()) { \
        if (!currChild) { \
            /* Need to make a new layer.*/ \
            currChild = new BackgroundLayer(); \
            prevChild->setNext(currChild); \
        } \
        currChild->set##Prop(currParent->prop()); \
        prevChild = currChild; \
        currChild = prevChild->next(); \
        currParent = currParent->next(); \
    } \
    \
    while (currChild) { \
        /* Reset any remaining layers to not have the property set. */ \
        currChild->clear##Prop(); \
        currChild = currChild->next(); \
    } \
    return; \
} \
if (isInitial) { \
    BackgroundLayer* currChild = style->accessBackgroundLayers(); \
    currChild->set##Prop(RenderStyle::initial##Prop()); \
    for (currChild = currChild->next(); currChild; currChild = currChild->next()) \
        currChild->clear##Prop(); \
    return; \
}

#define HANDLE_BACKGROUND_VALUE(prop, Prop, value) { \
HANDLE_BACKGROUND_INHERIT_AND_INITIAL(prop, Prop) \
if (!value->isPrimitiveValue() && !value->isValueList()) \
    return; \
BackgroundLayer* currChild = style->accessBackgroundLayers(); \
BackgroundLayer* prevChild = 0; \
if (value->isPrimitiveValue()) { \
    map##Prop(currChild, value); \
    currChild = currChild->next(); \
} \
else { \
    /* Walk each value and put it into a layer, creating new layers as needed. */ \
    CSSValueListImpl* valueList = static_cast<CSSValueListImpl*>(value); \
    for (unsigned int i = 0; i < valueList->length(); i++) { \
        if (!currChild) { \
            /* Need to make a new layer to hold this value */ \
            currChild = new BackgroundLayer(); \
            prevChild->setNext(currChild); \
        } \
        map##Prop(currChild, valueList->item(i)); \
        prevChild = currChild; \
        currChild = currChild->next(); \
    } \
} \
while (currChild) { \
    /* Reset all remaining layers to not have the property set. */ \
    currChild->clear##Prop(); \
    currChild = currChild->next(); \
} }

#define HANDLE_INHERIT_COND(propID, prop, Prop) \
if (id == propID) \
{\
    style->set##Prop(parentStyle->prop());\
    return;\
}

#define HANDLE_INITIAL_COND(propID, Prop) \
if (id == propID) \
{\
    style->set##Prop(RenderStyle::initial##Prop());\
    return;\
}

#define HANDLE_INITIAL_COND_WITH_VALUE(propID, Prop, Value) \
if (id == propID) \
{\
    style->set##Prop(RenderStyle::initial##Value());\
    return;\
}

namespace khtml {

CSSStyleSelectorList *CSSStyleSelector::s_defaultStyle;
CSSStyleSelectorList *CSSStyleSelector::s_defaultQuirksStyle;
CSSStyleSelectorList *CSSStyleSelector::s_defaultPrintStyle;
CSSStyleSheetImpl *CSSStyleSelector::s_defaultSheet;
RenderStyle* CSSStyleSelector::styleNotYetAvailable;
CSSStyleSheetImpl *CSSStyleSelector::s_quirksSheet;

enum PseudoState { PseudoUnknown, PseudoNone, PseudoLink, PseudoVisited};
static PseudoState pseudoState;


CSSStyleSelector::CSSStyleSelector( DocumentImpl* doc, QString userStyleSheet, StyleSheetListImpl *styleSheets,
                                    const KURL &url, bool _strictParsing )
{
    KHTMLView* view = doc->view();

    init(view ? view->part()->settings() : 0);

    strictParsing = _strictParsing;
    m_medium = view ? view->mediaType() : QString("all");

    selectors = 0;
    selectorCache = 0;
    properties = 0;
    userStyle = 0;
    userSheet = 0;
    paintDeviceMetrics = doc->paintDeviceMetrics();

    if(paintDeviceMetrics) // this may be null, not everyone uses khtmlview (Niko)
        computeFontSizes(paintDeviceMetrics, view ? view->part()->zoomFactor() : 100);

    if ( !userStyleSheet.isEmpty() ) {
        userSheet = new DOM::CSSStyleSheetImpl(doc);
        userSheet->parseString( DOMString( userStyleSheet ) );

        userStyle = new CSSStyleSelectorList();
        userStyle->append( userSheet, m_medium );
    }

    // add stylesheets from document
    authorStyle = new CSSStyleSelectorList();


    QPtrListIterator<StyleSheetImpl> it( styleSheets->styleSheets );
    for ( ; it.current(); ++it ) {
        if ( it.current()->isCSSStyleSheet() && !it.current()->disabled()) {
            authorStyle->append( static_cast<CSSStyleSheetImpl*>( it.current() ), m_medium );
        }
    }

    buildLists();

    //kdDebug( 6080 ) << "number of style sheets in document " << authorStyleSheets.count() << endl;
    //kdDebug( 6080 ) << "CSSStyleSelector: author style has " << authorStyle->count() << " elements"<< endl;

    KURL u = url;

    u.setQuery( QString::null );
    u.setRef( QString::null );
    encodedurl.file = u.url();
    int pos = encodedurl.file.findRev('/');
    encodedurl.path = encodedurl.file;
    if ( pos > 0 ) {
	encodedurl.path.truncate( pos );
	encodedurl.path += '/';
    }
    u.setPath( QString::null );
    encodedurl.host = u.url();

    //kdDebug() << "CSSStyleSelector::CSSStyleSelector encoded url " << encodedurl.path << endl;
}

CSSStyleSelector::CSSStyleSelector( CSSStyleSheetImpl *sheet )
{
    init(0L);

    KHTMLView *view = sheet->doc()->view();
    m_medium = view ? view->mediaType() : "screen";

    authorStyle = new CSSStyleSelectorList();
    authorStyle->append( sheet, m_medium );
}

void CSSStyleSelector::init(const KHTMLSettings* _settings)
{
    element = 0;
    settings = _settings;
    paintDeviceMetrics = 0;
    propsToApply = (CSSOrderedProperty **)malloc(128*sizeof(CSSOrderedProperty *));
    pseudoProps = (CSSOrderedProperty **)malloc(128*sizeof(CSSOrderedProperty *));
    propsToApplySize = 128;
    pseudoPropsSize = 128;
    if(!s_defaultStyle) loadDefaultStyle(settings);

    defaultStyle = s_defaultStyle;
    defaultPrintStyle = s_defaultPrintStyle;
    defaultQuirksStyle = s_defaultQuirksStyle;
}

CSSStyleSelector::~CSSStyleSelector()
{
    clearLists();
    delete authorStyle;
    delete userStyle;
    delete userSheet;
    free(propsToApply);
    free(pseudoProps);
}

void CSSStyleSelector::addSheet( CSSStyleSheetImpl *sheet )
{
    KHTMLView *view = sheet->doc()->view();
    m_medium = view ? view->mediaType() : "screen";
    authorStyle->append( sheet, m_medium );
}

void CSSStyleSelector::loadDefaultStyle(const KHTMLSettings *s)
{
    if(s_defaultStyle) return;

    {
	QFile f(locate( "data", "khtml/css/html4.css" ) );
	f.open(IO_ReadOnly);

	QCString file( f.size()+1 );
	int readbytes = f.readBlock( file.data(), f.size() );
	f.close();
	if ( readbytes >= 0 )
	    file[readbytes] = '\0';

	QString style = QString::fromLatin1( file.data() );
	if(s)
	    style += s->settingsToCSS();
	DOMString str(style);

	s_defaultSheet = new DOM::CSSStyleSheetImpl((DOM::CSSStyleSheetImpl * ) 0);
	s_defaultSheet->parseString( str );

	// Collect only strict-mode rules.
	s_defaultStyle = new CSSStyleSelectorList();
	s_defaultStyle->append( s_defaultSheet, "screen" );

	s_defaultPrintStyle = new CSSStyleSelectorList();
	s_defaultPrintStyle->append( s_defaultSheet, "print" );
    }
    {
	QFile f(locate( "data", "khtml/css/quirks.css" ) );
	f.open(IO_ReadOnly);

	QCString file( f.size()+1 );
	int readbytes = f.readBlock( file.data(), f.size() );
	f.close();
	if ( readbytes >= 0 )
	    file[readbytes] = '\0';

	QString style = QString::fromLatin1( file.data() );
	DOMString str(style);

	s_quirksSheet = new DOM::CSSStyleSheetImpl((DOM::CSSStyleSheetImpl * ) 0);
	s_quirksSheet->parseString( str );

	// Collect only quirks-mode rules.
	s_defaultQuirksStyle = new CSSStyleSelectorList();
	s_defaultQuirksStyle->append( s_quirksSheet, "screen" );
    }

    //kdDebug() << "CSSStyleSelector: default style has " << defaultStyle->count() << " elements"<< endl;
}

void CSSStyleSelector::clear()
{
    delete s_defaultStyle;
    delete s_defaultQuirksStyle;
    delete s_defaultPrintStyle;
    delete s_defaultSheet;
    delete styleNotYetAvailable;
    s_defaultStyle = 0;
    s_defaultQuirksStyle = 0;
    s_defaultPrintStyle = 0;
    s_defaultSheet = 0;
    styleNotYetAvailable = 0;
}

void CSSStyleSelector::reparseConfiguration()
{
    // nice leak, but best we can do right now. hopefully its only rare.
    s_defaultStyle = 0;
    s_defaultQuirksStyle = 0;
    s_defaultPrintStyle = 0;
    s_defaultSheet = 0;
}

#define MAXFONTSIZES 8

void CSSStyleSelector::computeFontSizes(QPaintDeviceMetrics* paintDeviceMetrics,  int zoomFactor)
{
    computeFontSizesFor(paintDeviceMetrics, zoomFactor, m_fontSizes, false);
    computeFontSizesFor(paintDeviceMetrics, zoomFactor, m_fixedFontSizes, true);
}