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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * ***** BEGIN LICENSE BLOCK *****
 * 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
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Foundation code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@mozilla.com>
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * 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"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef GFX_PANGOFONTS_H
#define GFX_PANGOFONTS_H

#include "cairo.h"
#include "gfxTypes.h"
#include "gfxFont.h"

#include "nsAutoRef.h"
#include "nsTArray.h"

#include <pango/pango.h>

class gfxFcFontSet;
class gfxFcFont;
class gfxProxyFontEntry;
typedef struct _FcPattern FcPattern;
typedef struct FT_FaceRec_* FT_Face;
typedef struct FT_LibraryRec_  *FT_Library;

class THEBES_API gfxPangoFontGroup : public gfxFontGroup {
public:
    gfxPangoFontGroup (const nsAString& families,
                       const gfxFontStyle *aStyle,
                       gfxUserFontSet *aUserFontSet);
    virtual ~gfxPangoFontGroup ();

    virtual gfxFontGroup *Copy(const gfxFontStyle *aStyle);

    virtual gfxFont *GetFontAt(PRInt32 i);

    virtual void UpdateFontList();

    virtual already_AddRefed<gfxFont>
        FindFontForChar(PRUint32 aCh, PRUint32 aPrevCh, PRInt32 aRunScript,
                        gfxFont *aPrevMatchedFont,
                        PRUint8 *aMatchType);

    static void Shutdown();

    // Used for @font-face { src: local(); }
    static gfxFontEntry *NewFontEntry(const gfxProxyFontEntry &aProxyEntry,
                                      const nsAString &aFullname);
    // Used for @font-face { src: url(); }
    static gfxFontEntry *NewFontEntry(const gfxProxyFontEntry &aProxyEntry,
                                      const PRUint8 *aFontData,
                                      PRUint32 aLength);

    // Interfaces used internally
    // (but public so that they can be accessed from non-member functions):

    // A language guessed from the gfxFontStyle
    PangoLanguage *GetPangoLanguage() { return mPangoLanguage; }

private:
    // @param aLang [in] language to use for pref fonts and system default font
    //        selection, or NULL for the language guessed from the gfxFontStyle.
    // The FontGroup holds a reference to this set.
    gfxFcFontSet *GetFontSet(PangoLanguage *aLang = NULL);

    class FontSetByLangEntry {
    public:
        FontSetByLangEntry(PangoLanguage *aLang, gfxFcFontSet *aFontSet);
        PangoLanguage *mLang;
        nsRefPtr<gfxFcFontSet> mFontSet;
    };
    // There is only one of entry in this array unless characters from scripts
    // of other languages are measured.
    nsAutoTArray<FontSetByLangEntry,1> mFontSets;

    gfxFloat mSizeAdjustFactor;
    PangoLanguage *mPangoLanguage;

    void GetFcFamilies(nsTArray<nsString> *aFcFamilyList,
                       nsIAtom *aLanguage);

    // @param aLang [in] language to use for pref fonts and system font
    //        resolution, or NULL to guess a language from the gfxFontStyle.
    // @param aMatchPattern [out] if non-NULL, will return the pattern used.
    already_AddRefed<gfxFcFontSet>
    MakeFontSet(PangoLanguage *aLang, gfxFloat aSizeAdjustFactor,
                nsAutoRef<FcPattern> *aMatchPattern = NULL);

    gfxFcFontSet *GetBaseFontSet();
    gfxFcFont *GetBaseFont();

    gfxFloat GetSizeAdjustFactor()
    {
        if (mFontSets.Length() == 0)
            GetBaseFontSet();
        return mSizeAdjustFactor;
    }

    static FT_Library GetFTLibrary();
};

#endif /* GFX_PANGOFONTS_H */