Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/win/UniscribeHelperTextRun.h

-/*
- * 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.
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- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
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- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef UniscribeHelperTextRun_h
-#define UniscribeHelperTextRun_h
-
-#include "core/platform/graphics/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