Make Document::caretRangeFromPoint() to work with :first-letter style

Source/core/rendering/HitTestResult.cpp

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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,
@@ skipping 25 matching lines @@
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLTextAreaElement.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/page/Frame.h"
 #include "core/page/FrameTree.h"
 #include "core/platform/Scrollbar.h"
 #include "core/rendering/HitTestLocation.h"
 #include "core/rendering/RenderImage.h"
+#include "core/rendering/RenderTextFragment.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 HitTestResult::HitTestResult()
     : m_isOverWidget(false)
     , m_allowPseudoElements(false)
+    , m_isFirstLetter(false)
 {
 }
 
 HitTestResult::HitTestResult(const LayoutPoint& point)
     : m_hitTestLocation(point)
     , m_pointInInnerNodeFrame(point)
     , m_isOverWidget(false)
     , m_allowPseudoElements(false)
+    , m_isFirstLetter(false)
 {
 }
 
 HitTestResult::HitTestResult(const LayoutPoint& centerPoint, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding)
     : m_hitTestLocation(centerPoint, topPadding, rightPadding, bottomPadding, leftPadding)
     , m_pointInInnerNodeFrame(centerPoint)
+    , m_isFirstLetter(false)
     , m_isOverWidget(false)
     , m_allowPseudoElements(false)
 {
 }
 
 HitTestResult::HitTestResult(const HitTestLocation& other)
     : m_hitTestLocation(other)
     , m_pointInInnerNodeFrame(m_hitTestLocation.point())
+    , m_isFirstLetter(false)
     , m_isOverWidget(false)
     , m_allowPseudoElements(false)
 {
 }
 
 HitTestResult::HitTestResult(const HitTestResult& other)
     : m_hitTestLocation(other.m_hitTestLocation)
     , m_innerNode(other.m_innerNode)
     , m_innerNonSharedNode(other.m_innerNonSharedNode)
     , m_pointInInnerNodeFrame(other.m_pointInInnerNodeFrame)
     , m_localPoint(other.localPoint())
     , m_innerURLElement(other.URLElement())
     , m_scrollbar(other.scrollbar())
+    , m_isFirstLetter(other.m_isFirstLetter)
     , m_isOverWidget(other.isOverWidget())
     , m_allowPseudoElements(other.m_allowPseudoElements)
 {
     // Only copy the NodeSet in case of rect hit test.
     m_rectBasedTestResult = adoptPtr(other.m_rectBasedTestResult ? new NodeSet(*other.m_rectBasedTestResult) : 0);
 }
 
 HitTestResult::~HitTestResult()
 {
 }
 
 HitTestResult& HitTestResult::operator=(const HitTestResult& other)
 {
     m_hitTestLocation = other.m_hitTestLocation;
     m_innerNode = other.m_innerNode;
     m_innerNonSharedNode = other.m_innerNonSharedNode;
     m_pointInInnerNodeFrame = other.m_pointInInnerNodeFrame;
     m_localPoint = other.localPoint();
     m_innerURLElement = other.URLElement();
     m_scrollbar = other.scrollbar();
+    m_isFirstLetter = other.m_isFirstLetter;
     m_isOverWidget = other.isOverWidget();
     m_allowPseudoElements |= other.m_allowPseudoElements; // Do not lose the pseudo element tracking if allowed.
 
     // Only copy the NodeSet in case of rect hit test.
     m_rectBasedTestResult = adoptPtr(other.m_rectBasedTestResult ? new NodeSet(*other.m_rectBasedTestResult) : 0);
 
     return *this;
 }
 
+RenderObject* HitTestResult::renderer() const
+{
+    if (!m_innerNode)
+        return 0;
+    RenderObject* renderer = m_innerNode->renderer();
+    if (!m_isFirstLetter || !renderer || !renderer->isText() || !toRenderText(renderer)->isTextFragment())
+        return renderer;
+    return toRenderTextFragment(renderer)->firstRenderTextInFirstLetter();
+}
+
 void HitTestResult::setToNodesInDocumentTreeScope()
 {
     if (Node* node = innerNode()) {
         node = node->document().ancestorInThisScope(node);
         setInnerNode(node);
     }
 
     if (Node* node = innerNonSharedNode()) {
         node = node->document().ancestorInThisScope(node);
         setInnerNonSharedNode(node);
@@ skipping 370 matching lines @@
 Element* HitTestResult::innerElement() const
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(node))
         if (node->isElementNode())
             return toElement(node);
 
     return 0;
 }
 
 } // namespace WebCore