diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/HitTestResult.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/HitTestResult.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,424 @@
+/*
+ * Copyright (C) 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 "HitTestResult.h"
+
+#include "Frame.h"
+#include "FrameTree.h"
+#include "HTMLAnchorElement.h"
+#include "HTMLImageElement.h"
+#include "HTMLInputElement.h"
+#include "HTMLMediaElement.h"
+#include "HTMLNames.h"
+#include "RenderImage.h"
+#include "Scrollbar.h"
+#include "SelectionController.h"
+
+#if ENABLE(SVG)
+#include "SVGNames.h"
+#include "XLinkNames.h"
+#endif
+
+#if ENABLE(WML)
+#include "WMLImageElement.h"
+#include "WMLNames.h"
+#endif
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+HitTestResult::HitTestResult(const IntPoint& point)
+    : m_point(point)
+    , m_isOverWidget(false)
+    , m_isRectBased(false)
+{
+}
+
+HitTestResult::HitTestResult(const IntPoint& centerPoint, const IntSize& padding)
+    : m_point(centerPoint)
+    , m_isOverWidget(false)
+{
+    // If a zero padding is passed in or either width or height is negative, then it
+    // is not a valid padding and hence not a rect based hit test.
+    m_isRectBased = !(padding.isZero() || (padding.width() < 0 || padding.height() < 0));
+    m_padding = m_isRectBased ? padding : IntSize();
+}
+
+HitTestResult::HitTestResult(const HitTestResult& other)
+    : m_innerNode(other.innerNode())
+    , m_innerNonSharedNode(other.innerNonSharedNode())
+    , m_point(other.point())
+    , m_localPoint(other.localPoint())
+    , m_innerURLElement(other.URLElement())
+    , m_scrollbar(other.scrollbar())
+    , m_isOverWidget(other.isOverWidget())
+{
+    // Only copy the padding and ListHashSet in case of rect hit test.
+    // Copying the later is rather expensive.
+    if ((m_isRectBased = other.isRectBasedTest())) {
+        m_padding = other.padding();
+        m_rectBasedTestResult = other.rectBasedTestResult();
+    }
+}
+
+HitTestResult::~HitTestResult()
+{
+}
+
+HitTestResult& HitTestResult::operator=(const HitTestResult& other)
+{
+    m_innerNode = other.innerNode();
+    m_innerNonSharedNode = other.innerNonSharedNode();
+    m_point = other.point();
+    m_localPoint = other.localPoint();
+    m_innerURLElement = other.URLElement();
+    m_scrollbar = other.scrollbar();
+    m_isOverWidget = other.isOverWidget();
+    // Only copy the padding and ListHashSet in case of rect hit test.
+    // Copying the later is rather expensive.
+    if ((m_isRectBased = other.isRectBasedTest())) {
+        m_padding = other.padding();
+        m_rectBasedTestResult = other.rectBasedTestResult();
+    }
+    return *this;
+}
+
+void HitTestResult::setToNonShadowAncestor()
+{
+    Node* node = innerNode();
+    if (node)
+        node = node->shadowAncestorNode();
+    setInnerNode(node);
+    node = innerNonSharedNode();
+    if (node)
+        node = node->shadowAncestorNode();
+    setInnerNonSharedNode(node);
+}
+
+void HitTestResult::setInnerNode(Node* n)
+{
+    m_innerNode = n;
+}
+    
+void HitTestResult::setInnerNonSharedNode(Node* n)
+{
+    m_innerNonSharedNode = n;
+}
+
+void HitTestResult::setURLElement(Element* n) 
+{ 
+    m_innerURLElement = n; 
+}
+
+void HitTestResult::setScrollbar(Scrollbar* s)
+{
+    m_scrollbar = s;
+}
+
+Frame* HitTestResult::targetFrame() const
+{
+    if (!m_innerURLElement)
+        return 0;
+
+    Frame* frame = m_innerURLElement->document()->frame();
+    if (!frame)
+        return 0;
+
+    return frame->tree()->find(m_innerURLElement->target());
+}
+
+bool HitTestResult::isSelected() const
+{
+    if (!m_innerNonSharedNode)
+        return false;
+
+    Frame* frame = m_innerNonSharedNode->document()->frame();
+    if (!frame)
+        return false;
+
+    return frame->selection()->contains(m_point);
+}
+
+String HitTestResult::spellingToolTip(TextDirection& dir) const
+{
+    dir = LTR;
+    // Return the tool tip string associated with this point, if any. Only markers associated with bad grammar
+    // currently supply strings, but maybe someday markers associated with misspelled words will also.
+    if (!m_innerNonSharedNode)
+        return String();
+    
+    DocumentMarker* marker = m_innerNonSharedNode->document()->markerContainingPoint(m_point, DocumentMarker::Grammar);
+    if (!marker)
+        return String();
+
+    if (RenderObject* renderer = m_innerNonSharedNode->renderer())
+        dir = renderer->style()->direction();
+    return marker->description;
+}
+
+String HitTestResult::replacedString() const
+{
+    // Return the replaced string associated with this point, if any. This marker is created when a string is autocorrected, 
+    // and is used for generating a contextual menu item that allows it to easily be changed back if desired.
+    if (!m_innerNonSharedNode)
+        return String();
+    
+    DocumentMarker* marker = m_innerNonSharedNode->document()->markerContainingPoint(m_point, DocumentMarker::Replacement);
+    if (!marker)
+        return String();
+    
+    return marker->description;
+}    
+    
+String HitTestResult::title(TextDirection& dir) const
+{
+    dir = LTR;
+    // Find the title in the nearest enclosing DOM node.
+    // For <area> tags in image maps, walk the tree for the <area>, not the <img> using it.
+    for (Node* titleNode = m_innerNode.get(); titleNode; titleNode = titleNode->parentNode()) {
+        if (titleNode->isElementNode()) {
+            String title = static_cast<Element*>(titleNode)->title();
+            if (!title.isEmpty()) {
+                if (RenderObject* renderer = titleNode->renderer())
+                    dir = renderer->style()->direction();
+                return title;
+            }
+        }
+    }
+    return String();
+}
+
+String displayString(const String& string, const Node* node)
+{
+    if (!node)
+        return string;
+    return node->document()->displayStringModifiedByEncoding(string);
+}
+
+String HitTestResult::altDisplayString() const
+{
+    if (!m_innerNonSharedNode)
+        return String();
+    
+    if (m_innerNonSharedNode->hasTagName(imgTag)) {
+        HTMLImageElement* image = static_cast<HTMLImageElement*>(m_innerNonSharedNode.get());
+        return displayString(image->getAttribute(altAttr), m_innerNonSharedNode.get());
+    }
+    
+    if (m_innerNonSharedNode->hasTagName(inputTag)) {
+        HTMLInputElement* input = static_cast<HTMLInputElement*>(m_innerNonSharedNode.get());
+        return displayString(input->alt(), m_innerNonSharedNode.get());
+    }
+
+#if ENABLE(WML)
+    if (m_innerNonSharedNode->hasTagName(WMLNames::imgTag)) {
+        WMLImageElement* image = static_cast<WMLImageElement*>(m_innerNonSharedNode.get());
+        return displayString(image->altText(), m_innerNonSharedNode.get());
+    }
+#endif
+
+    return String();
+}
+
+Image* HitTestResult::image() const
+{
+    if (!m_innerNonSharedNode)
+        return 0;
+    
+    RenderObject* renderer = m_innerNonSharedNode->renderer();
+    if (renderer && renderer->isImage()) {
+        RenderImage* image = static_cast<WebCore::RenderImage*>(renderer);
+        if (image->cachedImage() && !image->cachedImage()->errorOccurred())
+            return image->cachedImage()->image();
+    }
+
+    return 0;
+}
+
+IntRect HitTestResult::imageRect() const
+{
+    if (!image())
+        return IntRect();
+    return m_innerNonSharedNode->renderBox()->absoluteContentQuad().enclosingBoundingBox();
+}
+
+KURL HitTestResult::absoluteImageURL() const
+{
+    if (!(m_innerNonSharedNode && m_innerNonSharedNode->document()))
+        return KURL();
+
+    if (!(m_innerNonSharedNode->renderer() && m_innerNonSharedNode->renderer()->isImage()))
+        return KURL();
+
+    AtomicString urlString;
+    if (m_innerNonSharedNode->hasTagName(embedTag)
+        || m_innerNonSharedNode->hasTagName(imgTag)
+        || m_innerNonSharedNode->hasTagName(inputTag)
+        || m_innerNonSharedNode->hasTagName(objectTag)    
+#if ENABLE(SVG)
+        || m_innerNonSharedNode->hasTagName(SVGNames::imageTag)
+#endif
+#if ENABLE(WML)
+        || m_innerNonSharedNode->hasTagName(WMLNames::imgTag)
+#endif
+       ) {
+        Element* element = static_cast<Element*>(m_innerNonSharedNode.get());
+        urlString = element->getAttribute(element->imageSourceAttributeName());
+    } else
+        return KURL();
+
+    return m_innerNonSharedNode->document()->completeURL(deprecatedParseURL(urlString));
+}
+
+KURL HitTestResult::absoluteMediaURL() const
+{
+#if ENABLE(VIDEO)
+    if (!(m_innerNonSharedNode && m_innerNonSharedNode->document()))
+        return KURL();
+
+    if (!(m_innerNonSharedNode->renderer() && m_innerNonSharedNode->renderer()->isMedia()))
+        return KURL();
+
+    AtomicString urlString;
+    if (m_innerNonSharedNode->hasTagName(HTMLNames::videoTag) || m_innerNonSharedNode->hasTagName(HTMLNames::audioTag)) {
+        HTMLMediaElement* mediaElement = static_cast<HTMLMediaElement*>(m_innerNonSharedNode.get());
+        urlString = mediaElement->currentSrc();
+    } else
+        return KURL();
+
+    return m_innerNonSharedNode->document()->completeURL(deprecatedParseURL(urlString));
+#else
+    return KURL();
+#endif
+}
+
+KURL HitTestResult::absoluteLinkURL() const
+{
+    if (!(m_innerURLElement && m_innerURLElement->document()))
+        return KURL();
+
+    AtomicString urlString;
+    if (m_innerURLElement->hasTagName(aTag) || m_innerURLElement->hasTagName(areaTag) || m_innerURLElement->hasTagName(linkTag))
+        urlString = m_innerURLElement->getAttribute(hrefAttr);
+#if ENABLE(SVG)
+    else if (m_innerURLElement->hasTagName(SVGNames::aTag))
+        urlString = m_innerURLElement->getAttribute(XLinkNames::hrefAttr);
+#endif
+#if ENABLE(WML)
+    else if (m_innerURLElement->hasTagName(WMLNames::aTag))
+        urlString = m_innerURLElement->getAttribute(hrefAttr);
+#endif
+    else
+        return KURL();
+
+    return m_innerURLElement->document()->completeURL(deprecatedParseURL(urlString));
+}
+
+bool HitTestResult::isLiveLink() const
+{
+    if (!(m_innerURLElement && m_innerURLElement->document()))
+        return false;
+
+    if (m_innerURLElement->hasTagName(aTag))
+        return static_cast<HTMLAnchorElement*>(m_innerURLElement.get())->isLiveLink();
+#if ENABLE(SVG)
+    if (m_innerURLElement->hasTagName(SVGNames::aTag))
+        return m_innerURLElement->isLink();
+#endif
+#if ENABLE(WML)
+    if (m_innerURLElement->hasTagName(WMLNames::aTag))
+        return m_innerURLElement->isLink();
+#endif
+
+    return false;
+}
+
+String HitTestResult::titleDisplayString() const
+{
+    if (!m_innerURLElement)
+        return String();
+    
+    return displayString(m_innerURLElement->title(), m_innerURLElement.get());
+}
+
+String HitTestResult::textContent() const
+{
+    if (!m_innerURLElement)
+        return String();
+    return m_innerURLElement->textContent();
+}
+
+// FIXME: This function needs a better name and may belong in a different class. It's not
+// really isContentEditable(); it's more like needsEditingContextMenu(). In many ways, this
+// function would make more sense in the ContextMenu class, except that WebElementDictionary 
+// hooks into it. Anyway, we should architect this better. 
+bool HitTestResult::isContentEditable() const
+{
+    if (!m_innerNonSharedNode)
+        return false;
+
+    if (m_innerNonSharedNode->hasTagName(textareaTag) || m_innerNonSharedNode->hasTagName(isindexTag))
+        return true;
+
+    if (m_innerNonSharedNode->hasTagName(inputTag))
+        return static_cast<HTMLInputElement*>(m_innerNonSharedNode.get())->isTextField();
+
+    return m_innerNonSharedNode->isContentEditable();
+}
+
+bool HitTestResult::addNodeToRectBasedTestResult(Node* node, int x, int y, const IntRect& rect)
+{
+    // If it is not a rect-based hit test, this method has to be no-op.
+    // Return false, so the hit test stops.
+    if (!isRectBasedTest())
+        return false;
+
+    // If node is null, return true so the hit test can continue.
+    if (!node)
+        return true;
+
+    node = node->shadowAncestorNode();
+    m_rectBasedTestResult.add(node);
+
+    return !rect.contains(rectFromPoint(x, y));
+}
+
+void HitTestResult::append(const HitTestResult& other)
+{
+    ASSERT(isRectBasedTest() && other.isRectBasedTest());
+
+    if (!m_innerNode && other.innerNode()) {
+        m_innerNode = other.innerNode();
+        m_innerNonSharedNode = other.innerNonSharedNode();
+        m_localPoint = other.localPoint();
+        m_innerURLElement = other.URLElement();
+        m_scrollbar = other.scrollbar();
+        m_isOverWidget = other.isOverWidget();
+    }
+
+    const ListHashSet<RefPtr<Node> >& list = other.rectBasedTestResult();
+    ListHashSet<RefPtr<Node> >::const_iterator last = list.end();
+    for (ListHashSet<RefPtr<Node> >::const_iterator it = list.begin(); it != last; ++it)
+        m_rectBasedTestResult.add(it->get());
+}
+
+} // namespace WebCore