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+/*
+ * Copyright (C) 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.
+ * 3. Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 UniscribeController_h
+#define UniscribeController_h
+
+#include <usp10.h>
+#include "Font.h"
+#include "GlyphBuffer.h"
+#include "Vector.h"
+
+namespace WebCore {
+
+class UniscribeController {
+public:
+ UniscribeController(const Font*, const TextRun&);
+
+ // Advance and measure/place up to the specified character.
+ void advance(unsigned to, GlyphBuffer* = 0);
+
+ // Compute the character offset for a given x coordinate.
+ int offsetForPosition(int x, bool includePartialGlyphs);
+
+ // Returns the width of everything we've consumed so far.
+ float runWidthSoFar() const { return m_runWidthSoFar; }
+
+private:
+ void resetControlAndState();
+
+ void itemizeShapeAndPlace(const UChar*, unsigned length, const SimpleFontData*, GlyphBuffer*);
+ bool shapeAndPlaceItem(const UChar*, unsigned index, const SimpleFontData*, GlyphBuffer*);
+ bool shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData,
+ Vector<WORD>& glyphs, Vector<WORD>& clusters,
+ Vector<SCRIPT_VISATTR>& visualAttributes);
+
+ const Font& m_font;
+ const TextRun& m_run;
+
+ SCRIPT_CONTROL m_control;
+ SCRIPT_STATE m_state;
+ Vector<SCRIPT_ITEM> m_items;
+
+ unsigned m_currentCharacter;
+ int m_end;
+
+ float m_runWidthSoFar;
+ float m_padding;
+ float m_padPerSpace;
+
+ bool m_computingOffsetPosition;
+ bool m_includePartialGlyphs;
+ float m_offsetX;
+ int m_offsetPosition;
+};
+
+}
+#endif