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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/*
* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef UniscribeStateTextRun_H
#define UniscribeStateTextRun_H
#include "base/gfx/uniscribe.h"
namespace WebCore {
class Font;
class TextRun;
}
// Wrapper around the Uniscribe state that automatically sets it up with the
// WebKit types we supply.
class UniscribeStateTextRun : public gfx::UniscribeState {
public:
// Regular constructor used for WebCore text run processing.
UniscribeStateTextRun(const WebCore::TextRun& run,
const WebCore::Font& font);
// Constructor with the same interface as the gfx::UniscribeState. Using
// this constructor will not give you font fallback, but it will provide
// the ability to load fonts that may not be in the OS cache
// ("TryToPreloadFont") if the caller does not have a TextRun/Font.
UniscribeStateTextRun(const wchar_t* input,
int input_length,
bool is_rtl,
HFONT hfont,
SCRIPT_CACHE* script_cache,
SCRIPT_FONTPROPERTIES* font_properties);
protected:
virtual void TryToPreloadFont(HFONT font);
private:
// This function retrieves the Windows font data (HFONT, etc)
// for the next WebKit font in the list. If the font data
// corresponding to font_index_ has been obtained before,
// returns the values stored in our internal vectors (hfonts_, etc).
// Otherwise, it gets next SimpleFontData from WebKit and adds them to
// in hfonts_ and friends so that font data can be returned
// quickly next time they're requested.
virtual bool NextWinFontData(HFONT* hfont,
SCRIPT_CACHE** script_cache,
SCRIPT_FONTPROPERTIES** font_properties,
int* ascent);
virtual void ResetFontIndex();
// Reference to WebKit::Font that contains all the information
// about fonts we can use to render this input run of text.
// It is used in NextWinFontData to retrieve Windows font data
// for a series of non-primary fonts.
//
// This pointer can be NULL for no font fallback handling.
const WebCore::Font* font_;
// It's rare that many fonts are listed in stylesheets.
// Four would be large enough in most cases.
const static size_t kNumberOfFonts = 4;
// These vectors are used to store Windows font data for
// non-primary fonts.
StackVector<HFONT, kNumberOfFonts> hfonts_;
StackVector<SCRIPT_CACHE*, kNumberOfFonts> script_caches_;
StackVector<SCRIPT_FONTPROPERTIES*, kNumberOfFonts> font_properties_;
StackVector<int, kNumberOfFonts> ascents_;
//
int font_index_;
};
#endif // UniscribeStateTextRun_H
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