third_party/WebKit/WebCore/khtml/misc/helper.cpp - chromium/src - Git at Google

 /*
  * This file is part of the CSS implementation for KDE.
  *
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *
  * 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.
  *
  * $Id$
  */
 #include "helper.h"
 #include <qmap.h>
 #include <qpainter.h>
 #include <dom/dom_string.h>
 #include <xml/dom_stringimpl.h>
 #include <qlist.h>
 #include <khtmllayout.h>
 #include <kstaticdeleter.h>
 #include <kapp.h>
 #include <kconfig.h>
 #include <qtooltip.h>

 using namespace DOM;
 using namespace khtml;

 // ### make it const if possible...
  struct HTMLColors {
     QMap<QString,QColor> map;
     HTMLColors()
     {
         map["black"] = "#000000";
         map["green"] = "#008000";
         map["silver"] = "#c0c0c0";
         map["lime"] = "#00ff00";
         map["gray"] = "#808080";
         map["olive"] = "#808000";
         map["white"] = "#ffffff";
         map["yellow"] = "#ffff00";
         map["maroon"] = "#800000";
         map["navy"] = "#000080";
         map["red"] = "#ff0000";
         map["blue"] = "#0000ff";
         map["purple"] = "#800080";
         map["teal"] = "#008080";
         map["fuchsia"] = "#ff00ff";
         map["aqua"] = "#00ffff";
 	map["crimson"] = "#dc143c";
 	map["indigo"] = "#4b0082";
         // ### react to style changes
         // see http://www.richinstyle.com for details

 	/* Mapping system settings to CSS 2
 	 * Tried hard to get an appropriate mapping - schlpbch
 	 */

 	KConfig *globalConfig = KGlobal::config();
 	globalConfig->setGroup("WM");

 	QColorGroup cg = kapp->palette().active();

 	// Active window border.
         map["activeborder"] = globalConfig->readColorEntry( "background", &cg.light());
 	// Active window caption.
         map["activecaption"] = globalConfig->readColorEntry( "activeBackground", &cg.text());
         // Text in caption, size box, and scrollbar arrow box.
 	map["captiontext"] = globalConfig->readColorEntry( "activeForeground", &cg.text());

         cg = kapp->palette().inactive();

 	/* Don't know how to deal with buttons correctly */

 	// Face color for three-dimensional display elements.
         map["buttonface"] = cg.button();
 	// Dark shadow for three-dimensional display elements (for edges facing away from the light source).
         map["buttonhighlight"] = cg.light();
 	// Shadow color for three-dimensional display elements.
         map["buttonshadow"] = cg.shadow();
 	// Text on push buttons.
         map["buttontext"] = globalConfig->readColorEntry( "buttonForeground", &cg.buttonText());

 	// Dark shadow for three-dimensional display elements.
         map["threeddarkshadow"] = cg.dark();
 	// Face color for three-dimensional display elements.
         map["threedface"] = cg.button();
 	// Highlight color for three-dimensional display elements.
         map["threedhighlight"] = cg.light();
 	// Light color for three-dimensional display elements (for edges facing the light source).
         map["threedlightshadow"] = cg.midlight();
 	// Dark shadow for three-dimensional display elements.
         map["threedshadow"] = cg.shadow();

 	// InfoBackground
 #ifndef QT_NO_TOOLTIP
         map["infobackground"] = QToolTip::palette().inactive().background();
 	// InfoText
         map["infotext"] = QToolTip::palette().inactive().foreground();
 #endif

 	globalConfig->setGroup("General");
 	// Menu background
         map["menu"] = globalConfig->readColorEntry( "background", &cg.background());
 	// Text in menus
         map["menutext"] = globalConfig->readColorEntry( "foreground", &cg.background());

 	// Item(s) selected in a control.
         map["highlight"] = globalConfig->readColorEntry( "background", &cg.background()).light(110);
         // Text of item(s) selected in a control.
 	map["highlighttext"] = globalConfig->readColorEntry( "foreground", &cg.background());

 	// Background color of multiple document interface.
         map["appworkspace"] = globalConfig->readColorEntry( "background", &cg.text());

 	// Scroll bar gray area.
         map["scrollbar"] = globalConfig->readColorEntry( "background", &cg.background());

 	// Window background.
         map["window"] = globalConfig->readColorEntry( "windowBackground", &cg.background());
 	// Window frame.
         map["windowframe"] = globalConfig->readColorEntry( "windowBackground",&cg.background());
         // WindowText
 	map["windowtext"] = globalConfig->readColorEntry( "windowForeground", &cg.text());
         map["text"] = cg.text();

         cg = kapp->palette().disabled();
 	globalConfig->setGroup("WM");
 	// Inactive window border.
         map["inactiveborder"] = globalConfig->readColorEntry( "background", &cg.background());
 	// Inactive window caption.
         map["inactivecaption"] = globalConfig->readColorEntry( "inactiveBackground", &cg.background());
 	// Color of text in an inactive caption.
         map["inactivecaptiontext"] = globalConfig->readColorEntry( "inactiveForeground", &cg.text());
         map["graytext"] = cg.text();

 	KConfig *bckgrConfig = new KConfig("kdesktoprc"); // No multi-screen support
 	bckgrConfig->setGroup("Desktop0");
         // Desktop background.
 	map["background"] = bckgrConfig->readColorEntry("Color1", &cg.background());
 	delete bckgrConfig;
     };
 };

 static HTMLColors *htmlColors = 0L;

 static KStaticDeleter<HTMLColors> hcsd;

 void khtml::setNamedColor(QColor &color, const QString &_name)
 {
     if( !htmlColors )
         htmlColors = hcsd.setObject( new HTMLColors );

     int pos;
     QString name = _name;
     // remove white spaces for those broken websites out there :-(
     while ( ( pos = name.find( ' ' ) ) != -1 )  name.remove( pos, 1 );

     int len = name.length();

     if(len == 0 || (len == 11 && name.find("transparent", 0, false) == 0) )
     {
         color = QColor(); // invalid color == transparent
         return;
     }

     // also recognize "color=ffffff"
     if (len == 6)
     {
         bool ok;
         int val = name.toInt(&ok, 16);
         if(ok)
         {
             color.setRgb((0xff << 24) | val);
             return;
         }
         // recognize #12345 (duplicate the last character)
         if(name[0] == '#') {
             bool ok;
             int val = name.right(5).toInt(&ok, 16);
             if(ok) {
                 color.setRgb((0xff << 24) | (val * 16 + ( val&0xf )));
                 return;
             }
         }
         if ( !name[0].isLetter() ) {
 	    color = QColor();
 	    return;
 	}
     }

     // #fffffff as found on msdn.microsoft.com
     if ( name[0] == '#' && len > 7)
     {
         name = name.left(7);
     }

     if ( len > 4 && name[0].lower() == 'r' && name[1].lower() == 'g' &&
          name[2].lower() == 'b' && name[3] == '(' &&
          name[len-1] == ')')
     {
         // CSS like rgb(r, g, b) style
         DOMString rgb = name.mid(4, name.length()-5);
         QList<Length> *l = rgb.implementation()->toLengthList();
         if(l->count() != 3)
         {
 	    // transparent in case of an invalid color.
             color = QColor();
         } else {
 	    int r = l->at(0)->isUndefined() ? 0 : l->at(0)->width(255);
 	    if(r < 0) r = 0;
 	    if(r > 255) r = 255;
 	    int g = l->at(1)->isUndefined() ? 0 : l->at(1)->width(255);
 	    if(g < 0) g = 0;
 	    if(g > 255) g = 255;
 	    int b = l->at(2)->isUndefined() ? 0 : l->at(2)->width(255);
 	    if(b < 0) b = 0;
 	    if(b > 255) b = 255;

 	    color.setRgb(r, g, b);
 	}
         delete l;
     }
     else
     {
         QColor tc = htmlColors->map[name];
         if ( !tc.isValid() )
             tc = htmlColors->map[name.lower()];

         if (tc.isValid())
             color = tc;
         else {
             color.setNamedColor(name);
             if ( !color.isValid() )  color.setNamedColor( name.lower() );
             if(!color.isValid()) {
                 bool hasalpha = false;
                 for(unsigned int i = 0; i < name.length(); i++)
                     if(name[i].isLetterOrNumber()) {
                         hasalpha = true;
                         break;
                     }

                 if(!hasalpha)
                   color = Qt::black;
             }
         }
     }
 }

 QPainter *khtml::printpainter = 0;

 void khtml::setPrintPainter( QPainter *printer )
 {
     printpainter = printer;
 }

 QFontMetrics khtml::fontMetrics( const QFont &f )
 {
     if(printpainter) {
 	printpainter->setFont( f );
 	return printpainter->fontMetrics();
     }
     return QFontMetrics( f );
 }
	/*
	* This file is part of the CSS implementation for KDE.
	*
	* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
	*
	* 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.
	*
	* $Id$
	*/
	#include "helper.h"
	#include <qmap.h>
	#include <qpainter.h>
	#include <dom/dom_string.h>
	#include <xml/dom_stringimpl.h>
	#include <qlist.h>
	#include <khtmllayout.h>
	#include <kstaticdeleter.h>
	#include <kapp.h>
	#include <kconfig.h>
	#include <qtooltip.h>

	using namespace DOM;
	using namespace khtml;

	// ### make it const if possible...
	struct HTMLColors {
	QMap<QString,QColor> map;
	HTMLColors()
	{
	map["black"] = "#000000";
	map["green"] = "#008000";
	map["silver"] = "#c0c0c0";
	map["lime"] = "#00ff00";
	map["gray"] = "#808080";
	map["olive"] = "#808000";
	map["white"] = "#ffffff";
	map["yellow"] = "#ffff00";
	map["maroon"] = "#800000";
	map["navy"] = "#000080";
	map["red"] = "#ff0000";
	map["blue"] = "#0000ff";
	map["purple"] = "#800080";
	map["teal"] = "#008080";
	map["fuchsia"] = "#ff00ff";
	map["aqua"] = "#00ffff";
	map["crimson"] = "#dc143c";
	map["indigo"] = "#4b0082";
	// ### react to style changes
	// see http://www.richinstyle.com for details

	/* Mapping system settings to CSS 2
	* Tried hard to get an appropriate mapping - schlpbch
	*/

	KConfig *globalConfig = KGlobal::config();
	globalConfig->setGroup("WM");

	QColorGroup cg = kapp->palette().active();

	// Active window border.
	map["activeborder"] = globalConfig->readColorEntry( "background", &cg.light());
	// Active window caption.
	map["activecaption"] = globalConfig->readColorEntry( "activeBackground", &cg.text());
	// Text in caption, size box, and scrollbar arrow box.
	map["captiontext"] = globalConfig->readColorEntry( "activeForeground", &cg.text());

	cg = kapp->palette().inactive();

	/* Don't know how to deal with buttons correctly */

	// Face color for three-dimensional display elements.
	map["buttonface"] = cg.button();
	// Dark shadow for three-dimensional display elements (for edges facing away from the light source).
	map["buttonhighlight"] = cg.light();
	// Shadow color for three-dimensional display elements.
	map["buttonshadow"] = cg.shadow();
	// Text on push buttons.
	map["buttontext"] = globalConfig->readColorEntry( "buttonForeground", &cg.buttonText());

	// Dark shadow for three-dimensional display elements.
	map["threeddarkshadow"] = cg.dark();
	// Face color for three-dimensional display elements.
	map["threedface"] = cg.button();
	// Highlight color for three-dimensional display elements.
	map["threedhighlight"] = cg.light();
	// Light color for three-dimensional display elements (for edges facing the light source).
	map["threedlightshadow"] = cg.midlight();
	// Dark shadow for three-dimensional display elements.
	map["threedshadow"] = cg.shadow();

	// InfoBackground
	#ifndef QT_NO_TOOLTIP
	map["infobackground"] = QToolTip::palette().inactive().background();
	// InfoText
	map["infotext"] = QToolTip::palette().inactive().foreground();
	#endif

	globalConfig->setGroup("General");
	// Menu background
	map["menu"] = globalConfig->readColorEntry( "background", &cg.background());
	// Text in menus
	map["menutext"] = globalConfig->readColorEntry( "foreground", &cg.background());

	// Item(s) selected in a control.
	map["highlight"] = globalConfig->readColorEntry( "background", &cg.background()).light(110);
	// Text of item(s) selected in a control.
	map["highlighttext"] = globalConfig->readColorEntry( "foreground", &cg.background());

	// Background color of multiple document interface.
	map["appworkspace"] = globalConfig->readColorEntry( "background", &cg.text());

	// Scroll bar gray area.
	map["scrollbar"] = globalConfig->readColorEntry( "background", &cg.background());

	// Window background.
	map["window"] = globalConfig->readColorEntry( "windowBackground", &cg.background());
	// Window frame.
	map["windowframe"] = globalConfig->readColorEntry( "windowBackground",&cg.background());
	// WindowText
	map["windowtext"] = globalConfig->readColorEntry( "windowForeground", &cg.text());
	map["text"] = cg.text();

	cg = kapp->palette().disabled();
	globalConfig->setGroup("WM");
	// Inactive window border.
	map["inactiveborder"] = globalConfig->readColorEntry( "background", &cg.background());
	// Inactive window caption.
	map["inactivecaption"] = globalConfig->readColorEntry( "inactiveBackground", &cg.background());
	// Color of text in an inactive caption.
	map["inactivecaptiontext"] = globalConfig->readColorEntry( "inactiveForeground", &cg.text());
	map["graytext"] = cg.text();

	KConfig *bckgrConfig = new KConfig("kdesktoprc"); // No multi-screen support
	bckgrConfig->setGroup("Desktop0");
	// Desktop background.
	map["background"] = bckgrConfig->readColorEntry("Color1", &cg.background());
	delete bckgrConfig;
	};
	};

	static HTMLColors *htmlColors = 0L;

	static KStaticDeleter<HTMLColors> hcsd;

	void khtml::setNamedColor(QColor &color, const QString &_name)
	{
	if( !htmlColors )
	htmlColors = hcsd.setObject( new HTMLColors );

	int pos;
	QString name = _name;
	// remove white spaces for those broken websites out there :-(
	while ( ( pos = name.find( ' ' ) ) != -1 ) name.remove( pos, 1 );

	int len = name.length();

	if(len == 0 \|\| (len == 11 && name.find("transparent", 0, false) == 0) )
	{
	color = QColor(); // invalid color == transparent
	return;
	}

	// also recognize "color=ffffff"
	if (len == 6)
	{
	bool ok;
	int val = name.toInt(&ok, 16);
	if(ok)
	{
	color.setRgb((0xff << 24) \| val);
	return;
	}
	// recognize #12345 (duplicate the last character)
	if(name[0] == '#') {
	bool ok;
	int val = name.right(5).toInt(&ok, 16);
	if(ok) {
	color.setRgb((0xff << 24) \| (val * 16 + ( val&0xf )));
	return;
	}
	}
	if ( !name[0].isLetter() ) {
	color = QColor();
	return;
	}
	}

	// #fffffff as found on msdn.microsoft.com
	if ( name[0] == '#' && len > 7)
	{
	name = name.left(7);
	}

	if ( len > 4 && name[0].lower() == 'r' && name[1].lower() == 'g' &&
	name[2].lower() == 'b' && name[3] == '(' &&
	name[len-1] == ')')
	{
	// CSS like rgb(r, g, b) style
	DOMString rgb = name.mid(4, name.length()-5);
	QList<Length> *l = rgb.implementation()->toLengthList();
	if(l->count() != 3)
	{
	// transparent in case of an invalid color.
	color = QColor();
	} else {
	int r = l->at(0)->isUndefined() ? 0 : l->at(0)->width(255);
	if(r < 0) r = 0;
	if(r > 255) r = 255;
	int g = l->at(1)->isUndefined() ? 0 : l->at(1)->width(255);
	if(g < 0) g = 0;
	if(g > 255) g = 255;
	int b = l->at(2)->isUndefined() ? 0 : l->at(2)->width(255);
	if(b < 0) b = 0;
	if(b > 255) b = 255;

	color.setRgb(r, g, b);
	}
	delete l;
	}
	else
	{
	QColor tc = htmlColors->map[name];
	if ( !tc.isValid() )
	tc = htmlColors->map[name.lower()];

	if (tc.isValid())
	color = tc;
	else {
	color.setNamedColor(name);
	if ( !color.isValid() ) color.setNamedColor( name.lower() );
	if(!color.isValid()) {
	bool hasalpha = false;
	for(unsigned int i = 0; i < name.length(); i++)
	if(name[i].isLetterOrNumber()) {
	hasalpha = true;
	break;
	}

	if(!hasalpha)
	color = Qt::black;
	}
	}
	}
	}

	QPainter *khtml::printpainter = 0;

	void khtml::setPrintPainter( QPainter *printer )
	{
	printpainter = printer;
	}

	QFontMetrics khtml::fontMetrics( const QFont &f )
	{
	if(printpainter) {
	printpainter->setFont( f );
	return printpainter->fontMetrics();
	}
	return QFontMetrics( f );
	}