Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 256 insertions, 0 deletions

diff --git a/Source/WebCore/dom/MouseRelatedEvent.cpp b/Source/WebCore/dom/MouseRelatedEvent.cpp
new file mode 100644
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+++ b/Source/WebCore/dom/MouseRelatedEvent.cpp
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+/*
+ * Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
+ * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
+ * Copyright (C) 2003, 2005, 2006, 2008 Apple 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.
+ */
+
+#include "config.h"
+#include "MouseRelatedEvent.h"
+
+#include "DOMWindow.h"
+#include "Document.h"
+#include "Frame.h"
+#include "FrameView.h"
+#include "RenderLayer.h"
+#include "RenderObject.h"
+
+namespace WebCore {
+
+MouseRelatedEvent::MouseRelatedEvent()
+    : m_isSimulated(false)
+    , m_hasCachedRelativePosition(false)
+{
+}
+
+static LayoutSize contentsScrollOffset(AbstractView* abstractView)
+{
+    if (!abstractView)
+        return LayoutSize();
+    Frame* frame = abstractView->frame();
+    if (!frame)
+        return LayoutSize();
+    FrameView* frameView = frame->view();
+    if (!frameView)
+        return LayoutSize();
+    float scaleFactor = frame->pageZoomFactor() * frame->frameScaleFactor();
+    return LayoutSize(frameView->scrollX() / scaleFactor, frameView->scrollY() / scaleFactor);
+}
+
+MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtr<AbstractView> abstractView,
+                                     int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
+#if ENABLE(POINTER_LOCK)
+                                     const IntPoint& movementDelta,
+#endif
+                                     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated)
+    : UIEventWithKeyState(eventType, canBubble, cancelable, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey)
+    , m_screenLocation(screenLocation)
+#if ENABLE(POINTER_LOCK)
+    , m_movementDelta(movementDelta)
+#endif
+    , m_isSimulated(isSimulated)
+{
+    LayoutPoint adjustedPageLocation;
+    LayoutPoint scrollPosition;
+
+    Frame* frame = view() ? view()->frame() : 0;
+    if (frame && !isSimulated) {
+        if (FrameView* frameView = frame->view()) {
+            scrollPosition = frameView->scrollPosition();
+            adjustedPageLocation = frameView->windowToContents(windowLocation);
+            float scaleFactor = frame->pageZoomFactor() * frame->frameScaleFactor();
+            if (scaleFactor != 1.0f) {
+                // Adjust our pageX and pageY to account for the page zoom.
+                adjustedPageLocation.scale(1 / scaleFactor, 1 / scaleFactor);
+
+                // FIXME: Change this to use float math and proper rounding (or
+                // better yet, use LayoutPoint::scale).
+                scrollPosition.setX(scrollPosition.x() / scaleFactor);
+                scrollPosition.setY(scrollPosition.y() / scaleFactor);
+            }
+        }
+    }
+
+    m_clientLocation = adjustedPageLocation - toLayoutSize(scrollPosition);
+    m_pageLocation = adjustedPageLocation;
+
+    initCoordinates();
+}
+
+void MouseRelatedEvent::initCoordinates()
+{
+    // Set up initial values for coordinates.
+    // Correct values are computed lazily, see computeRelativePosition.
+    m_layerLocation = m_pageLocation;
+    m_offsetLocation = m_pageLocation;
+
+    computePageLocation();
+    m_hasCachedRelativePosition = false;
+}
+
+void MouseRelatedEvent::initCoordinates(const LayoutPoint& clientLocation)
+{
+    // Set up initial values for coordinates.
+    // Correct values are computed lazily, see computeRelativePosition.
+    m_clientLocation = clientLocation;
+    m_pageLocation = clientLocation + contentsScrollOffset(view());
+
+    m_layerLocation = m_pageLocation;
+    m_offsetLocation = m_pageLocation;
+
+    computePageLocation();
+    m_hasCachedRelativePosition = false;
+}
+
+static float pageZoomFactor(const UIEvent* event)
+{
+    DOMWindow* window = event->view();
+    if (!window)
+        return 1;
+    Frame* frame = window->frame();
+    if (!frame)
+        return 1;
+    return frame->pageZoomFactor();
+}
+
+static float frameScaleFactor(const UIEvent* event)
+{
+    DOMWindow* window = event->view();
+    if (!window)
+        return 1;
+    Frame* frame = window->frame();
+    if (!frame)
+        return 1;
+    return frame->frameScaleFactor();
+}
+
+void MouseRelatedEvent::computePageLocation()
+{
+    float scaleFactor = pageZoomFactor(this) * frameScaleFactor(this);
+    setAbsoluteLocation(roundedLayoutPoint(FloatPoint(pageX() * scaleFactor, pageY() * scaleFactor)));
+}
+
+void MouseRelatedEvent::receivedTarget()
+{
+    m_hasCachedRelativePosition = false;
+}
+
+void MouseRelatedEvent::computeRelativePosition()
+{
+    Node* targetNode = target() ? target()->toNode() : 0;
+    if (!targetNode)
+        return;
+
+    // Compute coordinates that are based on the target.
+    m_layerLocation = m_pageLocation;
+    m_offsetLocation = m_pageLocation;
+
+    // Must have an updated render tree for this math to work correctly.
+    targetNode->document()->updateStyleIfNeeded();
+
+    // Adjust offsetLocation to be relative to the target's position.
+    if (!isSimulated()) {
+        if (RenderObject* r = targetNode->renderer()) {
+            FloatPoint localPos = r->absoluteToLocal(absoluteLocation(), false, true);
+            m_offsetLocation = roundedLayoutPoint(localPos);
+            float scaleFactor = 1 / (pageZoomFactor(this) * frameScaleFactor(this));
+            if (scaleFactor != 1.0f)
+                m_offsetLocation.scale(scaleFactor, scaleFactor);
+        }
+    }
+
+    // Adjust layerLocation to be relative to the layer.
+    // FIXME: We're pretty sure this is the wrong definition of "layer."
+    // Our RenderLayer is a more modern concept, and layerX/Y is some
+    // other notion about groups of elements (left over from the Netscape 4 days?);
+    // we should test and fix this.
+    Node* n = targetNode;
+    while (n && !n->renderer())
+        n = n->parentNode();
+
+    RenderLayer* layer;
+    if (n && (layer = n->renderer()->enclosingLayer())) {
+        layer->updateLayerPosition();
+        for (; layer; layer = layer->parent()) {
+            m_layerLocation -= toLayoutSize(layer->location());
+        }
+    }
+
+    m_hasCachedRelativePosition = true;
+}
+
+int MouseRelatedEvent::layerX()
+{
+    warnDeprecatedLayerXYUsage();
+    if (!m_hasCachedRelativePosition)
+        computeRelativePosition();
+    return m_layerLocation.x();
+}
+
+int MouseRelatedEvent::layerY()
+{
+    warnDeprecatedLayerXYUsage();
+    if (!m_hasCachedRelativePosition)
+        computeRelativePosition();
+    return m_layerLocation.y();
+}
+
+int MouseRelatedEvent::offsetX()
+{
+    if (!m_hasCachedRelativePosition)
+        computeRelativePosition();
+    return m_offsetLocation.x();
+}
+
+int MouseRelatedEvent::offsetY()
+{
+    if (!m_hasCachedRelativePosition)
+        computeRelativePosition();
+    return m_offsetLocation.y();
+}
+
+int MouseRelatedEvent::pageX() const
+{
+    return m_pageLocation.x();
+}
+
+int MouseRelatedEvent::pageY() const
+{
+    return m_pageLocation.y();
+}
+
+const LayoutPoint& MouseRelatedEvent::pageLocation() const
+{
+    return m_pageLocation;
+}
+
+int MouseRelatedEvent::x() const
+{
+    // FIXME: This is not correct.
+    // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>.
+    return m_clientLocation.x();
+}
+
+int MouseRelatedEvent::y() const
+{
+    // FIXME: This is not correct.
+    // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>.
+    return m_clientLocation.y();
+}
+
+} // namespace WebCore