Separate LineBreaker from RenderBlockLineLayout

Source/core/rendering/line/LineBreaker.h

+/*
+ * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
+ * Copyright (C) 2010 Google 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 LineBreaker_h
+#define LineBreaker_h
+
+#include "core/rendering/InlineIterator.h"
+#include "core/rendering/line/LineInfo.h"
+#include "platform/text/TextBreakIterator.h"
+#include "wtf/Vector.h"
+
+namespace WebCore {
+
+enum WhitespacePosition { LeadingWhitespace, TrailingWhitespace };
+
+class RenderText;
+
+struct RenderTextInfo {
+    RenderTextInfo();
+    ~RenderTextInfo();
+
+    RenderText* m_text;
+    LazyLineBreakIterator m_lineBreakIterator;
+    const Font* m_font;
+};
+
+class LineBreaker {
+public:
+    friend class BreakingContext;
+    LineBreaker(RenderBlockFlow* block)
+        : m_block(block)
+    {
+        reset();
+    }
+
+    InlineIterator nextLineBreak(InlineBidiResolver&, LineInfo&, RenderTextInfo&, FloatingObject* lastFloatFromPreviousLine, unsigned consecutiveHyphenatedLines, WordMeasurements&);
+
+    bool lineWasHyphenated() { return m_hyphenated; }
+    const Vector<RenderBox*>& positionedObjects() { return m_positionedObjects; }
+    EClear clear() { return m_clear; }
+private:
+    void reset();
+
+    InlineIterator nextSegmentBreak(InlineBidiResolver&, LineInfo&, RenderTextInfo&, FloatingObject* lastFloatFromPreviousLine, unsigned consecutiveHyphenatedLines, WordMeasurements&);
+    void skipLeadingWhitespace(InlineBidiResolver&, LineInfo&, FloatingObject* lastFloatFromPreviousLine, LineWidth&);
+
+    RenderBlockFlow* m_block;
+    bool m_hyphenated;
+    EClear m_clear;
+    Vector<RenderBox*> m_positionedObjects;
+};
+
+}
+
+#endif // LineBreaker_h