Remove ViewportAnchor.

sky/engine/web/ViewportAnchor.cpp

Index: sky/engine/web/ViewportAnchor.cpp
diff --git a/sky/engine/web/ViewportAnchor.cpp b/sky/engine/web/ViewportAnchor.cpp
deleted file mode 100644
index 4a6a3d40164d5d6fb0f61dfd69c1936e049087c7..0000000000000000000000000000000000000000
--- a/sky/engine/web/ViewportAnchor.cpp
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * 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 "web/ViewportAnchor.h"
-
-#include "core/dom/ContainerNode.h"
-#include "core/dom/Node.h"
-#include "core/page/EventHandler.h"
-#include "core/rendering/HitTestResult.h"
-
-namespace blink {
-
-namespace {
-
-static const float viewportAnchorRelativeEpsilon = 0.1f;
-static const int viewportToNodeMaxRelativeArea = 2;
-
-template <typename RectType>
-int area(const RectType& rect) {
-    return rect.width() * rect.height();
-}
-
-Node* findNonEmptyAnchorNode(const IntPoint& point, const IntRect& viewRect, EventHandler* eventHandler)
-{
-    Node* node = eventHandler->hitTestResultAtPoint(point, HitTestRequest::ReadOnly | HitTestRequest::Active).innerNode();
-
-    // If the node bounding box is sufficiently large, make a single attempt to
-    // find a smaller node; the larger the node bounds, the greater the
-    // variability under resize.
-    const int maxNodeArea = area(viewRect) * viewportToNodeMaxRelativeArea;
-    if (node && area(node->boundingBox()) > maxNodeArea) {
-        IntSize pointOffset = viewRect.size();
-        pointOffset.scale(viewportAnchorRelativeEpsilon);
-        node = eventHandler->hitTestResultAtPoint(point + pointOffset, HitTestRequest::ReadOnly | HitTestRequest::Active).innerNode();
-    }
-
-    while (node && node->boundingBox().isEmpty())
-        node = node->parentNode();
-
-    return node;
-}
-
-} // namespace
-
-ViewportAnchor::ViewportAnchor(EventHandler* eventHandler)
-    : m_eventHandler(eventHandler) { }
-
-void ViewportAnchor::setAnchor(const IntRect& viewRect, const FloatSize& anchorInViewCoords)
-{
-    m_viewRect = viewRect;
-    m_anchorNode.clear();
-    m_anchorNodeBounds = LayoutRect();
-    m_anchorInNodeCoords = FloatSize();
-    m_anchorInViewCoords = anchorInViewCoords;
-
-    if (viewRect.isEmpty())
-        return;
-
-    // Preserve origins at the absolute screen origin
-    if (viewRect.location() == IntPoint::zero())
-        return;
-
-    FloatSize anchorOffset = viewRect.size();
-    anchorOffset.scale(anchorInViewCoords.width(), anchorInViewCoords.height());
-    const FloatPoint anchorPoint = FloatPoint(viewRect.location()) + anchorOffset;
-
-    Node* node = findNonEmptyAnchorNode(flooredIntPoint(anchorPoint), viewRect, m_eventHandler);
-    if (!node)
-        return;
-
-    m_anchorNode = node;
-    m_anchorNodeBounds = node->boundingBox();
-    m_anchorInNodeCoords = anchorPoint - m_anchorNodeBounds.location();
-    m_anchorInNodeCoords.scale(1.f / m_anchorNodeBounds.width(), 1.f / m_anchorNodeBounds.height());
-}
-
-IntPoint ViewportAnchor::computeOrigin(const IntSize& currentViewSize) const
-{
-    if (!m_anchorNode || !m_anchorNode->inDocument())
-        return m_viewRect.location();
-
-    const LayoutRect currentNodeBounds = m_anchorNode->boundingBox();
-    if (m_anchorNodeBounds == currentNodeBounds)
-        return m_viewRect.location();
-
-    // Compute the new anchor point relative to the node position
-    FloatSize anchorOffsetFromNode = currentNodeBounds.size();
-    anchorOffsetFromNode.scale(m_anchorInNodeCoords.width(), m_anchorInNodeCoords.height());
-    FloatPoint anchorPoint = currentNodeBounds.location() + anchorOffsetFromNode;
-
-    // Compute the new origin point relative to the new anchor point
-    FloatSize anchorOffsetFromOrigin = currentViewSize;
-    anchorOffsetFromOrigin.scale(m_anchorInViewCoords.width(), m_anchorInViewCoords.height());
-    return flooredIntPoint(anchorPoint - anchorOffsetFromOrigin);
-}
-
-} // namespace blink