csshelper.h

monqueror一个很具有参考价值的源玛

/*
 * This file is part of the CSS implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * $Id: csshelper.h,v 1.1.1.1 2002/01/16 10:39:55 ymwei Exp $
 */
#ifndef css_helper_h
#define css_helper_h

//#include <qcolor.h>

#include "dom_string.h"

class MGHTMLPart;

namespace DOM
{
    class CSSPrimitiveValueImpl;
};

namespace khtml
{
    class RenderStyle;

    enum Metrics
    {
	MetricScreen,
	MetricPrinter
    };

    /*
     * computes a length in pixels out of the given CSSValue. Need the RenderStyle to get
     * the fontinfo in case val is defined in em or ex.
     *
     * The metrics have to be a bit different for screen and printer output.
     * For screen output we assume 1 inch == 72 px, for printer we assume 300 dpi
     *
     * this is screen/printer dependent, so we probably need a config option for this,
     * and some tool to calibrate.
     */
    int computeLength(DOM::CSSPrimitiveValueImpl *val, RenderStyle *style, MGHTMLPart* part = NULL, Metrics m = MetricScreen);

    /*
     * mostly just removes the url("...") brace
     */
    DOM::DOMString parseURL(const DOM::DOMString &url);
};



#endif