1 files changed, 106 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/ClipRect.h b/Source/WebCore/rendering/ClipRect.h
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+++ b/Source/WebCore/rendering/ClipRect.h
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+/*
+ * Copyright (C) 2015 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
+ */
+
+#pragma once
+
+#include "LayoutRect.h"
+
+namespace WebCore {
+
+class HitTestLocation;
+
+class ClipRect {
+public:
+    ClipRect() = default;
+    
+    ClipRect(const LayoutRect& rect)
+        : m_rect(rect)
+    {
+    }
+    
+    const LayoutRect& rect() const { return m_rect; }
+
+    void reset() { m_rect = LayoutRect::infiniteRect(); }
+
+    bool affectedByRadius() const { return m_affectedByRadius; }
+    void setAffectedByRadius(bool affectedByRadius) { m_affectedByRadius = affectedByRadius; }
+    
+    bool operator==(const ClipRect& other) const { return rect() == other.rect() && affectedByRadius() == other.affectedByRadius(); }
+    bool operator!=(const ClipRect& other) const { return rect() != other.rect() || affectedByRadius() != other.affectedByRadius(); }
+    bool operator!=(const LayoutRect& otherRect) const { return rect() != otherRect; }
+    
+    void intersect(const LayoutRect& other);
+    void intersect(const ClipRect& other);
+    void move(LayoutUnit x, LayoutUnit y) { m_rect.move(x, y); }
+    void move(const LayoutSize& size) { m_rect.move(size); }
+    void moveBy(const LayoutPoint& point) { m_rect.moveBy(point); }
+    
+    bool intersects(const LayoutRect&) const;
+    bool intersects(const HitTestLocation&) const;
+
+    bool isEmpty() const { return m_rect.isEmpty(); }
+    bool isInfinite() const { return m_rect.isInfinite(); }
+
+    void inflateX(LayoutUnit dx) { m_rect.inflateX(dx); }
+    void inflateY(LayoutUnit dy) { m_rect.inflateY(dy); }
+    void inflate(LayoutUnit d) { inflateX(d); inflateY(d); }
+    
+private:
+    LayoutRect m_rect;
+    bool m_affectedByRadius = false;
+};
+
+inline void ClipRect::intersect(const LayoutRect& other)
+{
+    if (other.isInfinite())
+        return;
+    if (isInfinite())
+        m_rect = other;
+    else
+        m_rect.intersect(other);
+}
+
+inline void ClipRect::intersect(const ClipRect& other)
+{
+    intersect(other.rect());
+    if (other.affectedByRadius())
+        m_affectedByRadius = true;
+}
+    
+inline bool ClipRect::intersects(const LayoutRect& rect) const
+{
+    if (isInfinite() || rect.isInfinite())
+        return true;
+    return m_rect.intersects(rect);
+}
+
+inline ClipRect intersection(const ClipRect& a, const ClipRect& b)
+{
+    ClipRect c = a;
+    c.intersect(b);
+    return c;
+}
+
+} // namespace WebCore