css_valueimpl.cpp

khtml在gtk上的移植版本

/**
 * This file is part of the DOM implementation for KDE.
 *
 * (C) 1999-2003 Lars Knoll ([e-mail])
 * Copyright (C) 2002 Apple Computer, Inc.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "dom/css_value.h"
#include "dom/dom_exception.h"
#include "dom/dom_string.h"

#include "css/css_valueimpl.h"
#include "css/css_ruleimpl.h"
#include "css/css_stylesheetimpl.h"
#include "css/cssparser.h"
#include "css/cssproperties.h"
#include "css/cssvalues.h"
#include "css/cssstyleselector.h"

#include "xml/dom_stringimpl.h"
#include "xml/dom_docimpl.h"

#include "misc/loader.h"

#include "rendering/font.h"
#include "rendering/render_style.h"

#include <kdebug.h>
#include <qregexp.h>
#include <qpaintdevice.h>
#include <qpaintdevicemetrics.h>

// Hack for debugging purposes
extern DOM::DOMString getPropertyName(unsigned short id);

using khtml::FontDef;
using khtml::CSSStyleSelector;

using namespace DOM;

CSSStyleDeclarationImpl::CSSStyleDeclarationImpl(CSSRuleImpl *parent)
    : StyleBaseImpl(parent)
{
    m_lstValues = 0;
    m_node = 0;
}

CSSStyleDeclarationImpl::CSSStyleDeclarationImpl(CSSRuleImpl *parent, QPtrList<CSSProperty> *lstValues)
    : StyleBaseImpl(parent)
{
    m_lstValues = lstValues;
    m_node = 0;
}

CSSStyleDeclarationImpl&  CSSStyleDeclarationImpl::operator= (const CSSStyleDeclarationImpl& o)
{
    // don't attach it to the same node, just leave the current m_node value
    delete m_lstValues;
    m_lstValues = 0;
    if (o.m_lstValues) {
        m_lstValues = new QPtrList<CSSProperty>;
        m_lstValues->setAutoDelete( true );

        QPtrListIterator<CSSProperty> lstValuesIt(*o.m_lstValues);
        for (lstValuesIt.toFirst(); lstValuesIt.current(); ++lstValuesIt)
            m_lstValues->append(new CSSProperty(*lstValuesIt.current()));
    }

    return *this;
}

CSSStyleDeclarationImpl::~CSSStyleDeclarationImpl()
{
    delete m_lstValues;
    // we don't use refcounting for m_node, to avoid cyclic references (see ElementImpl)
}

DOMString CSSStyleDeclarationImpl::getPropertyValue( int propertyID ) const
{
    if(!m_lstValues) return DOMString();

    CSSValueImpl* value = getPropertyCSSValue( propertyID );
    if ( value )
        return value->cssText();

    // Shorthand and 4-values properties
    switch ( propertyID ) {
    case CSS_PROP_BACKGROUND_POSITION:
    {
        // ## Is this correct? The code in cssparser.cpp is confusing
        const int properties[2] = { CSS_PROP_BACKGROUND_POSITION_X,
                                    CSS_PROP_BACKGROUND_POSITION_Y };
        return getShortHandValue( properties, 2 );
    }
    case CSS_PROP_BACKGROUND:
    {
        const int properties[5] = { CSS_PROP_BACKGROUND_IMAGE, CSS_PROP_BACKGROUND_REPEAT,
                                    CSS_PROP_BACKGROUND_ATTACHMENT, CSS_PROP_BACKGROUND_POSITION,
                                    CSS_PROP_BACKGROUND_COLOR };
        return getShortHandValue( properties, 5 );
    }
    case CSS_PROP_BORDER:
    {
        const int properties[3] = { CSS_PROP_BORDER_WIDTH, CSS_PROP_BORDER_STYLE,
                                    CSS_PROP_BORDER_COLOR };
        return getShortHandValue( properties, 3 );
    }
    case CSS_PROP_BORDER_TOP:
    {
        const int properties[3] = { CSS_PROP_BORDER_TOP_WIDTH, CSS_PROP_BORDER_TOP_STYLE,
                                    CSS_PROP_BORDER_TOP_COLOR};
        return getShortHandValue( properties, 3 );
    }
    case CSS_PROP_BORDER_RIGHT:
    {
        const int properties[3] = { CSS_PROP_BORDER_RIGHT_WIDTH, CSS_PROP_BORDER_RIGHT_STYLE,
                                    CSS_PROP_BORDER_RIGHT_COLOR};
        return getShortHandValue( properties, 3 );
    }
    case CSS_PROP_BORDER_BOTTOM:
    {
        const int properties[3] = { CSS_PROP_BORDER_BOTTOM_WIDTH, CSS_PROP_BORDER_BOTTOM_STYLE,
                                    CSS_PROP_BORDER_BOTTOM_COLOR};
        return getShortHandValue( properties, 3 );
    }
    case CSS_PROP_BORDER_LEFT:
    {
        const int properties[3] = { CSS_PROP_BORDER_LEFT_WIDTH, CSS_PROP_BORDER_LEFT_STYLE,
                                    CSS_PROP_BORDER_LEFT_COLOR};
        return getShortHandValue( properties, 3 );
    }
    case CSS_PROP_OUTLINE:
    {
        const int properties[3] = { CSS_PROP_OUTLINE_WIDTH, CSS_PROP_OUTLINE_STYLE,
                                    CSS_PROP_OUTLINE_COLOR };
        return getShortHandValue( properties, 3 );
    }
    case CSS_PROP_BORDER_COLOR:
    {
        const int properties[4] = { CSS_PROP_BORDER_TOP_COLOR, CSS_PROP_BORDER_RIGHT_COLOR,
                                    CSS_PROP_BORDER_BOTTOM_COLOR, CSS_PROP_BORDER_LEFT_COLOR };
        return get4Values( properties );
    }
    case CSS_PROP_BORDER_WIDTH:
    {
        const int properties[4] = { CSS_PROP_BORDER_TOP_WIDTH, CSS_PROP_BORDER_RIGHT_WIDTH,
                                    CSS_PROP_BORDER_BOTTOM_WIDTH, CSS_PROP_BORDER_LEFT_WIDTH };
        return get4Values( properties );
    }
    case CSS_PROP_BORDER_STYLE:
    {
        const int properties[4] = { CSS_PROP_BORDER_TOP_STYLE, CSS_PROP_BORDER_RIGHT_STYLE,
                                    CSS_PROP_BORDER_BOTTOM_STYLE, CSS_PROP_BORDER_LEFT_STYLE };
        return get4Values( properties );
    }
    case CSS_PROP_MARGIN:
    {
        const int properties[4] = { CSS_PROP_MARGIN_TOP, CSS_PROP_MARGIN_RIGHT,
                                    CSS_PROP_MARGIN_BOTTOM, CSS_PROP_MARGIN_LEFT };
        return get4Values( properties );
    }
    case CSS_PROP_PADDING:
    {
        const int properties[4] = { CSS_PROP_PADDING_TOP, CSS_PROP_PADDING_RIGHT,
                                    CSS_PROP_PADDING_BOTTOM, CSS_PROP_PADDING_LEFT };
        return get4Values( properties );
    }
    case CSS_PROP_LIST_STYLE:
    {
        const int properties[3] = { CSS_PROP_LIST_STYLE_TYPE, CSS_PROP_LIST_STYLE_POSITION,
                                    CSS_PROP_LIST_STYLE_IMAGE };
        return getShortHandValue( properties, 3 );
    }
    }
    //kdDebug() << k_funcinfo << "property not found:" << propertyID << endl;
    return DOMString();
}

DOMString CSSStyleDeclarationImpl::get4Values( const int* properties ) const
{
    DOMString res;
    for ( int i = 0 ; i < 4 ; ++i ) {
        CSSValueImpl* value = getPropertyCSSValue( properties[i] );
        if ( !value ) { // apparently all 4 properties must be specified.
            return DOMString();
        }
        if ( i > 0 )
            res += " ";
        res += value->cssText();
    }
    return res;
}

DOMString CSSStyleDeclarationImpl::getShortHandValue( const int* properties, int number ) const
{
    DOMString res;
    for ( int i = 0 ; i < number ; ++i ) {
        CSSValueImpl* value = getPropertyCSSValue( properties[i] );
        if ( value ) { // TODO provide default value if !value
            if ( !res.isNull() )
                res += " ";
            res += value->cssText();
        }
    }
    return res;
}

 CSSValueImpl *CSSStyleDeclarationImpl::getPropertyCSSValue( int propertyID ) const
{
    if(!m_lstValues) return 0;

    QPtrListIterator<CSSProperty> lstValuesIt(*m_lstValues);
    CSSProperty *current;
    for ( lstValuesIt.toLast(); (current = lstValuesIt.current()); --lstValuesIt )
        if (current->m_id == propertyID)
            return current->value();
    return 0;
}

DOMString CSSStyleDeclarationImpl::removeProperty(int propertyID, bool notifyChanged)
{
    if(!m_lstValues) return DOMString();
    DOMString value;

    QPtrListIterator<CSSProperty> lstValuesIt(*m_lstValues);
     CSSProperty *current;
     for ( lstValuesIt.toLast(); (current = lstValuesIt.current()); --lstValuesIt )
         if (current->m_id == propertyID) {
             value = current->value()->cssText();
             m_lstValues->removeRef(current);
             if (notifyChanged)
                 setChanged();
	     break;
        }

    return value;
}

void CSSStyleDeclarationImpl::setChanged()
{
    if (m_node) {
        m_node->setChanged();
        return;
    }

    // ### quick&dirty hack for KDE 3.0... make this MUCH better! (Dirk)
    for (StyleBaseImpl* stylesheet = this; stylesheet; stylesheet = stylesheet->parent())
        if (stylesheet->isCSSStyleSheet()) {
            static_cast<CSSStyleSheetImpl*>(stylesheet)->doc()->updateStyleSelector();
            break;
        }
}

bool CSSStyleDeclarationImpl::getPropertyPriority( int propertyID ) const
{
    if ( m_lstValues) {
	QPtrListIterator<CSSProperty> lstValuesIt(*m_lstValues);
	CSSProperty *current;
	for ( lstValuesIt.toFirst(); (current = lstValuesIt.current()); ++lstValuesIt ) {
	    if( propertyID == current->m_id )
		return current->m_bImportant;
	}
    }
    return false;
}

bool CSSStyleDeclarationImpl::setProperty(int id, const DOMString &value, bool important, bool notifyChanged)
{
    if(!m_lstValues) {
	m_lstValues = new QPtrList<CSSProperty>;
	m_lstValues->setAutoDelete(true);
    }
    removeProperty(id);

    CSSParser parser( strictParsing );
    bool success = parser.parseValue(this, id, value, important);
    if(!success)
	kdDebug( 6080 ) << "CSSStyleDeclarationImpl::setProperty invalid property: [" << getPropertyName(id).string()
			<< "] value: [" << value.string() << "]"<< endl;
    else if (notifyChanged)
        setChanged();
    return success;
}

void CSSStyleDeclarationImpl::setProperty(int id, int value, bool important, bool notifyChanged)
{
    if(!m_lstValues) {
	m_lstValues = new QPtrList<CSSProperty>;
	m_lstValues->setAutoDelete(true);
    }
    removeProperty(id);

    CSSValueImpl * cssValue = new CSSPrimitiveValueImpl(value);
    setParsedValue(id, cssValue, important, m_lstValues);
    if (notifyChanged)
        setChanged();
}

void CSSStyleDeclarationImpl::setStringProperty(int propertyId, const DOMString &value, CSSPrimitiveValue::UnitTypes type, bool important)
{
    if (!m_lstValues) {
	m_lstValues = new QPtrList<CSSProperty>;
	m_lstValues->setAutoDelete(true);
    }
    removeProperty(propertyId);
    setParsedValue(propertyId, new CSSPrimitiveValueImpl(value, type), important, m_lstValues);
    setChanged();
}

void CSSStyleDeclarationImpl::setImageProperty(int propertyId, const DOMString &URL, bool important)
{
    if (!m_lstValues) {
	m_lstValues = new QPtrList<CSSProperty>;
	m_lstValues->setAutoDelete(true);
    }
    removeProperty(propertyId);
    setParsedValue(propertyId, new CSSImageValueImpl(URL, this), important, m_lstValues);
    setChanged();
}

void CSSStyleDeclarationImpl::setProperty ( const DOMString &propertyString)
{
    if(!m_lstValues) {
	m_lstValues = new QPtrList<CSSProperty>;
	m_lstValues->setAutoDelete( true );
    }

    CSSParser parser(strictParsing);
    parser.parseDeclaration(this, propertyString);
    setChanged();
}

void CSSStyleDeclarationImpl::setLengthProperty(int id, const DOM::DOMString &value, bool important, bool _multiLength )
{
    bool parseMode = strictParsing;
    strictParsing = false;
    multiLength = _multiLength;
    setProperty( id, value, important);
    strictParsing = parseMode;
    multiLength = false;
}

unsigned long CSSStyleDeclarationImpl::length() const
{
    return m_lstValues ? m_lstValues->count() : 0;
}

DOMString CSSStyleDeclarationImpl::item( unsigned long /*index*/ )
{
    // ###
    //return m_lstValues->at(index);
    return DOMString();
}

CSSRuleImpl *CSSStyleDeclarationImpl::parentRule() const
{
    return (m_parent && m_parent->isRule() ) ?
	static_cast<CSSRuleImpl *>(m_parent) : 0;
}

DOM::DOMString CSSStyleDeclarationImpl::cssText() const
{
    DOMString result;
    
    if ( m_lstValues) {
	QPtrListIterator<CSSProperty> lstValuesIt(*m_lstValues);
	CSSProperty *current;
	for ( lstValuesIt.toFirst(); (current = lstValuesIt.current()); ++lstValuesIt )
	    result += current->cssText();
    }

    return result;
}

void CSSStyleDeclarationImpl::setCssText(const DOM::DOMString& text)
{
    if (m_lstValues)
        m_lstValues->clear();
    else {
	m_lstValues = new QPtrList<CSSProperty>;
	m_lstValues->setAutoDelete(true);
    }

    CSSParser parser(strictParsing);
    parser.parseDeclaration(this, text);
    setChanged();
}

bool CSSStyleDeclarationImpl::parseString( const DOMString &/*string*/, bool )
{
    return false;
    // ###
}

// --------------------------------------------------------------------------------------

CSSValueImpl::CSSValueImpl()
    : StyleBaseImpl()
{
}

CSSValueImpl::~CSSValueImpl()
{
}

unsigned short CSSInheritedValueImpl::cssValueType() const
{
    return CSSValue::CSS_INHERIT;
}

DOM::DOMString CSSInheritedValueImpl::cssText() const
{
    return DOMString("inherit");
}

unsigned short CSSInitialValueImpl::cssValueType() const
{ 
    return CSSValue::CSS_INITIAL; 
}

DOM::DOMString CSSInitialValueImpl::cssText() const
{
    return DOMString("initial");
}

// ----------------------------------------------------------------------------------------

CSSValueListImpl::CSSValueListImpl()
    : CSSValueImpl()
{
}

CSSValueListImpl::~CSSValueListImpl()
{
    CSSValueImpl *val = m_values.first();
    while( val ) {
	val->deref();
	val = m_values.next();
    }
}

unsigned short CSSValueListImpl::cssValueType() const
{
    return CSSValue::CSS_VALUE_LIST;
}

void CSSValueListImpl::append(CSSValueImpl *val)
{
    m_values.append(val);
    val->ref();
}

DOM::DOMString CSSValueListImpl::cssText() const
{
    DOMString result = "";

    for (QPtrListIterator<CSSValueImpl> iterator(m_values); iterator.current(); ++iterator) {
	result += iterator.current()->cssText();
    }
    
    return result;
}

// -------------------------------------------------------------------------------------

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl()
    : CSSValueImpl()
{
    m_type = 0;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(int ident)
    : CSSValueImpl()
{
    m_value.ident = ident;
    m_type = CSSPrimitiveValue::CSS_IDENT;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(double num, CSSPrimitiveValue::UnitTypes type)
{
    m_value.num = num;
    m_type = type;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(const DOMString &str, CSSPrimitiveValue::UnitTypes type)
{
    m_value.string = str.implementation();
    if(m_value.string) m_value.string->ref();
    m_type = type;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(const Counter &c)
{
    m_value.counter = c.handle();
    if (m_value.counter)
	m_value.counter->ref();
    m_type = CSSPrimitiveValue::CSS_COUNTER;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl( RectImpl *r)
{
    m_value.rect = r;
    if (m_value.rect)
	m_value.rect->ref();
    m_type = CSSPrimitiveValue::CSS_RECT;
}

CSSPrimitiveValueImpl::CSSPrimitiveValueImpl(QRgb color)
{
    m_value.rgbcolor = color;
    m_type = CSSPrimitiveValue::CSS_RGBCOLOR;
}

CSSPrimitiveValueImpl::~CSSPrimitiveValueImpl()
{
    cleanup();
}

void CSSPrimitiveValueImpl::cleanup()