1 files changed, 105 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/ExclusionShapeInsideInfo.h b/Source/WebCore/rendering/ExclusionShapeInsideInfo.h
new file mode 100644
index 000000000..9db1b101e
--- /dev/null
+++ b/Source/WebCore/rendering/ExclusionShapeInsideInfo.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2012 Adobe Systems Incorporated. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “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 HOLDER 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 ExclusionShapeInsideInfo_h
+#define ExclusionShapeInsideInfo_h
+
+#if ENABLE(CSS_EXCLUSIONS)
+
+#include "ExclusionShape.h"
+#include "FloatRect.h"
+#include "LayoutTypesInlineMethods.h"
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class RenderBlock;
+
+class ExclusionShapeInsideInfo {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    ~ExclusionShapeInsideInfo();
+
+    static PassOwnPtr<ExclusionShapeInsideInfo> create(RenderBlock* block) { return adoptPtr(new ExclusionShapeInsideInfo(block)); }
+    static ExclusionShapeInsideInfo* exclusionShapeInsideInfoForRenderBlock(const RenderBlock*);
+    static ExclusionShapeInsideInfo* ensureExclusionShapeInsideInfoForRenderBlock(RenderBlock*);
+    static void removeExclusionShapeInsideInfoForRenderBlock(const RenderBlock*);
+    static bool isExclusionShapeInsideInfoEnabledForRenderBlock(const RenderBlock*);
+
+    LayoutUnit shapeLogicalTop() const 
+    { 
+        ASSERT(m_shape);
+        return m_shape->shapeLogicalBoundingBox().y();
+    }
+    LayoutUnit shapeLogicalBottom() const
+    {
+        ASSERT(m_shape);
+        return m_shape->shapeLogicalBoundingBox().maxY();
+    }
+    bool hasSegments() const
+    {
+        return lineOverlapsShapeBounds() && m_segments.size();
+    }
+    const SegmentList& segments() const
+    {
+        ASSERT(hasSegments());
+        return m_segments;
+    }
+    bool computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineBottom);
+    bool lineOverlapsShapeBounds() const;
+    void computeShapeSize(LayoutUnit logicalWidth, LayoutUnit logicalHeight);
+    void dirtyShapeSize() { m_shapeSizeDirty = true; }
+
+private:
+    ExclusionShapeInsideInfo(RenderBlock*);
+
+    RenderBlock* m_block;
+    OwnPtr<ExclusionShape> m_shape;
+
+    LayoutUnit m_lineTop;
+    LayoutUnit m_lineBottom;
+    LayoutUnit m_logicalWidth;
+    LayoutUnit m_logicalHeight;
+
+    SegmentList m_segments;
+    bool m_shapeSizeDirty;
+};
+
+inline bool ExclusionShapeInsideInfo::lineOverlapsShapeBounds() const
+{
+    ASSERT(m_shape);
+    FloatRect shapeBounds = m_shape->shapeLogicalBoundingBox();
+    return m_lineTop <= shapeBounds.maxY() && m_lineBottom >= shapeBounds.y();
+}
+
+}
+#endif
+#endif