/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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 * License.
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 * The Original Code is Oracle Corporation code.
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 * The Initial Developer of the Original Code is Oracle Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Stuart Parmenter <pavlov@pavlov.net>
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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 * ***** END LICENSE BLOCK ***** */

#ifndef GFX_TEXTRUN_H
#define GFX_TEXTRUN_H

#include "prtypes.h"
#include "gfxTypes.h"

class nsIFontMetrics;
class nsIAtom;

class gfxTextRun {
    // these do not copy the text
    gfxTextRun(const char* ASCII, int length, nsIFontMetrics* font, nsIAtom* language);
    gfxTextRun(const PRUnichar* unicode, int length, nsIFontMetrics* font, nsIAtom* language);
 
    enum { ClusterStart = 0x1 } CharFlags;
    // ClusterStart: character is the first character of a cluster/glyph
    void GetCharacterFlags(int pos, int len, CharFlags* flags);

    struct Dimensions {
        gfxFloat ascent, descent, width, leftBearing, rightBearing;
    };
    Dimensions MeasureText(int pos, int len);

    // Compute how many characters from this string starting at
    // character 'pos' and up to length 'len' fit
    // into the given width. 'breakflags' indicates our
    // preferences about where we allow breaks.
    // We will usually want to call MeasureText right afterwards,
    // the implementor could optimize for that.
    int GetCharsFit(int pos, int len, gfxFloat width, int breakflags);

    int GetPositionInString(gfxPoint& pt);
};

#endif