Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 84 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderTextFragment.h b/Source/WebCore/rendering/RenderTextFragment.h
new file mode 100644
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--- /dev/null
+++ b/Source/WebCore/rendering/RenderTextFragment.h
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+/*
+ * (C) 1999 Lars Knoll (knoll@kde.org)
+ * (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef RenderTextFragment_h
+#define RenderTextFragment_h
+
+#include "RenderText.h"
+
+namespace WebCore {
+
+// Used to represent a text substring of an element, e.g., for text runs that are split because of
+// first letter and that must therefore have different styles (and positions in the render tree).
+// We cache offsets so that text transformations can be applied in such a way that we can recover
+// the original unaltered string from our corresponding DOM node.
+class RenderTextFragment : public RenderText {
+public:
+    RenderTextFragment(Node*, StringImpl*, int startOffset, int length);
+    RenderTextFragment(Node*, StringImpl*);
+    virtual ~RenderTextFragment();
+
+    virtual bool isTextFragment() const { return true; }
+
+    virtual void destroy();
+
+    unsigned start() const { return m_start; }
+    unsigned end() const { return m_end; }
+
+    RenderObject* firstLetter() const { return m_firstLetter; }
+    void setFirstLetter(RenderObject* firstLetter) { m_firstLetter = firstLetter; }
+
+    StringImpl* contentString() const { return m_contentString.get(); }
+    virtual PassRefPtr<StringImpl> originalText() const;
+
+protected:
+    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
+
+private:
+    virtual void setTextInternal(PassRefPtr<StringImpl>);
+    virtual UChar previousCharacter() const;
+    RenderBlock* blockForAccompanyingFirstLetter() const;
+
+    unsigned m_start;
+    unsigned m_end;
+    RefPtr<StringImpl> m_contentString;
+    RenderObject* m_firstLetter;
+};
+
+inline RenderTextFragment* toRenderTextFragment(RenderObject* object)
+{ 
+    ASSERT(!object || toRenderText(object)->isTextFragment());
+    return static_cast<RenderTextFragment*>(object);
+}
+
+inline const RenderTextFragment* toRenderTextFragment(const RenderObject* object)
+{ 
+    ASSERT(!object || toRenderText(object)->isTextFragment());
+    return static_cast<const RenderTextFragment*>(object);
+}
+
+// This will catch anyone doing an unnecessary cast.
+void toRenderTextFragment(const RenderTextFragment*);
+
+} // namespace WebCore
+
+#endif // RenderTextFragment_h