Remove clips where we can show that they are unnecessary.

Source/core/rendering/RenderOverflowTest.cpp

+/*
+ * Copyright (C) 2013 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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.
+ */
+
+#include "config.h"
+#include "core/rendering/RenderOverflow.h"
+
+#include "core/platform/graphics/LayoutRect.h"
+
+#include <gtest/gtest.h>
+
+using namespace WebCore;
+
+namespace WebCore {
+
+// FIXME: Move this somewhere more generic.
+void PrintTo(const LayoutRect& rect, std::ostream* os)
+{
+    *os << "LayoutRect("
+        << rect.x().toFloat() << ", "
+        << rect.y().toFloat() << ", "
+        << rect.width().toFloat() << ", "
+        << rect.height().toFloat() << ")";
+}
+
+} // namespace WebCore
+
+namespace {
+
+LayoutRect initialLayoutOverflow()
+{
+    return LayoutRect(10, 10, 80, 80);
+}
+
+LayoutRect initialVisualOverflow()
+{
+    return LayoutRect(0, 0, 100, 100);
+}
+
+class RenderOverflowTest : public testing::Test {
+protected:
+    RenderOverflowTest() : m_overflow(initialLayoutOverflow(), initialVisualOverflow()) { }
+    RenderOverflow m_overflow;
+};
+
+TEST_F(RenderOverflowTest, InitialOverflowRects)
+{
+    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
+    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
+    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
+}
+
+TEST_F(RenderOverflowTest, AddLayoutOverflowOutsideExpandsRect)
+{
+    m_overflow.addLayoutOverflow(LayoutRect(0, 10, 30, 10));
+    EXPECT_EQ(LayoutRect(0, 10, 90, 80), m_overflow.layoutOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddLayoutOverflowInsideDoesNotAffectRect)
+{
+    m_overflow.addLayoutOverflow(LayoutRect(50, 50, 10, 20));
+    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddLayoutOverflowEmpty)
+{
+    // This test documents the existing behavior so that we are aware when/if
+    // it changes. It would also be reasonable for addLayoutOverflow to be
+    // a no-op in this situation.
+    m_overflow.addLayoutOverflow(LayoutRect(200, 200, 0, 0));
+    EXPECT_EQ(LayoutRect(10, 10, 190, 190), m_overflow.layoutOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddLayoutOverflowDoesNotAffectVisualOverflow)
+{
+    m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
+    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddLayoutOverflowDoesNotAffectContentsVisualOverflow)
+{
+    m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
+    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
+}
+
+TEST_F(RenderOverflowTest, AddVisualOverflowOutsideExpandsRect)
+{
+    m_overflow.addVisualOverflow(LayoutRect(150, -50, 10, 10));
+    EXPECT_EQ(LayoutRect(0, -50, 160, 150), m_overflow.visualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddVisualOverflowInsideDoesNotAffectRect)
+{
+    m_overflow.addVisualOverflow(LayoutRect(0, 10, 90, 90));
+    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddVisualOverflowEmpty)
+{
+    // This test documents the existing behavior so that we are aware when/if
+    // it changes. It would also be reasonable for addVisualOverflow to be
+    // a no-op in this situation.
+    m_overflow.addVisualOverflow(LayoutRect(200, 200, 0, 0));
+    EXPECT_EQ(LayoutRect(0, 0, 200, 200), m_overflow.visualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddVisualOverflowDoesNotAffectLayoutOverflow)
+{
+    m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
+    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddVisualOverflowDoesNotAffectContentsVisualOverflow)
+{
+    m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
+    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
+}
+
+TEST_F(RenderOverflowTest, AddContentsVisualOverflowFirstCall)
+{
+    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
+    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddContentsVisualOverflowUnitesRects)
+{
+    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
+    m_overflow.addContentsVisualOverflow(LayoutRect(80, 80, 10, 10));
+    EXPECT_EQ(LayoutRect(0, 0, 90, 90), m_overflow.contentsVisualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddContentsVisualOverflowRectWithinRect)
+{
+    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
+    m_overflow.addContentsVisualOverflow(LayoutRect(2, 2, 5, 5));
+    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, AddContentsVisualOverflowEmpty)
+{
+    // This test documents the existing behavior so that we are aware when/if
+    // it changes. It would also be reasonable for addContentsVisualOverflow to
+    // expand in this situation.
+    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
+    m_overflow.addContentsVisualOverflow(LayoutRect(20, 20, 0, 0));
+    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, MoveAffectsLayoutOverflow)
+{
+    m_overflow.move(500, 100);
+    EXPECT_EQ(LayoutRect(510, 110, 80, 80), m_overflow.layoutOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, MoveAffectsVisualOverflow)
+{
+    m_overflow.move(500, 100);
+    EXPECT_EQ(LayoutRect(500, 100, 100, 100), m_overflow.visualOverflowRect());
+}
+
+TEST_F(RenderOverflowTest, MoveAffectsContentsVisualOverflow)
+{
+    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
+    m_overflow.move(500, 100);
+    EXPECT_EQ(LayoutRect(500, 100, 10, 10), m_overflow.contentsVisualOverflowRect());
+}
+
+} // namespace