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-/*
- * Copyright (c) 2006, 2007, 2008, 2009, Google 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:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * 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.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 THE COPYRIGHT
- * OWNER 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 UniscribeHelperTextRun_h
-#define UniscribeHelperTextRun_h
-
-#include "platform/fonts/win/UniscribeHelper.h"
-#include "wtf/text/WTFString.h"
-
-namespace WebCore {
-
-class Font;
-class TextRun;
-
-// Wrapper around the Uniscribe helper that automatically sets it up with the
-// WebKit types we supply.
-class UniscribeHelperTextRun : public UniscribeHelper {
-public:
- // Regular constructor used for WebCore text run processing.
- UniscribeHelperTextRun(const TextRun&, const 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.
- UniscribeHelperTextRun(const wchar_t* input,
- int inputLength,
- bool isRtl,
- HFONT hfont,
- SCRIPT_CACHE*,
- SCRIPT_FONTPROPERTIES*);
-
-protected:
- virtual void tryToPreloadFont(HFONT);
-
-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&, SCRIPT_CACHE*&, SCRIPT_FONTPROPERTIES*&, int& ascent, WORD& spaceGlyph);
- virtual void resetFontIndex();
-
- // Reference to blink::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 Font* m_font;
-
- // When we have an 8 bit TestRun, we store the buffer of upconverted characters
- // in this string.
- String m_stringFor8BitRun;
-
- // 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.
- Vector<HFONT, kNumberOfFonts> m_hfonts;
- Vector<SCRIPT_CACHE*, kNumberOfFonts> m_scriptCaches;
- Vector<SCRIPT_FONTPROPERTIES*, kNumberOfFonts> m_fontProperties;
- Vector<int, kNumberOfFonts> m_ascents;
- Vector<WORD> m_spaceGlyphs;
-
- // Index of the fallback font we're currently using for NextWinFontData.
- int m_fontIndex;
-};
-
-} // namespace WebCore
-
-#endif // UniscribeHelperTextRun_h