auto import from //depot/cupcake/@135843

1 files changed, 2074 insertions, 0 deletions

diff --git a/WebCore/editing/Editor.cpp b/WebCore/editing/Editor.cpp
new file mode 100644
index 0000000..1890338
--- /dev/null
+++ b/WebCore/editing/Editor.cpp
@@ -0,0 +1,2074 @@
+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "Editor.h"
+
+#include "AXObjectCache.h"
+#include "ApplyStyleCommand.h"
+#include "CSSComputedStyleDeclaration.h"
+#include "CSSProperty.h"
+#include "CSSPropertyNames.h"
+#include "ClipboardEvent.h"
+#include "DeleteButtonController.h"
+#include "DeleteSelectionCommand.h"
+#include "DocLoader.h"
+#include "DocumentFragment.h"
+#include "EditorClient.h"
+#include "EventHandler.h"
+#include "EventNames.h"
+#include "FocusController.h"
+#include "Frame.h"
+#include "FrameTree.h"
+#include "FrameView.h"
+#include "HTMLInputElement.h"
+#include "HTMLTextAreaElement.h"
+#include "HitTestResult.h"
+#include "IndentOutdentCommand.h"
+#include "InsertListCommand.h"
+#include "KeyboardEvent.h"
+#include "ModifySelectionListLevel.h"
+#include "Page.h"
+#include "Pasteboard.h"
+#include "RemoveFormatCommand.h"
+#include "RenderBlock.h"
+#include "RenderPart.h"
+#include "ReplaceSelectionCommand.h"
+#include "Sound.h"
+#include "Text.h"
+#include "TextIterator.h"
+#include "TypingCommand.h"
+#include "htmlediting.h"
+#include "markup.h"
+#include "visible_units.h"
+
+namespace WebCore {
+
+using namespace std;
+using namespace HTMLNames;
+
+// When an event handler has moved the selection outside of a text control
+// we should use the target control's selection for this editing operation.
+Selection Editor::selectionForCommand(Event* event)
+{
+    Selection selection = m_frame->selection()->selection();
+    if (!event)
+        return selection;
+    // If the target is a text control, and the current selection is outside of its shadow tree,
+    // then use the saved selection for that text control.
+    Node* target = event->target()->toNode();
+    Node* selectionStart = selection.start().node();
+    if (target && (!selectionStart || target->shadowAncestorNode() != selectionStart->shadowAncestorNode())) {
+        if (target->hasTagName(inputTag) && static_cast<HTMLInputElement*>(target)->isTextField())
+            return static_cast<HTMLInputElement*>(target)->selection();
+        if (target->hasTagName(textareaTag))
+            return static_cast<HTMLTextAreaElement*>(target)->selection();
+    }
+    return selection;
+}
+
+EditorClient* Editor::client() const
+{
+    if (Page* page = m_frame->page())
+        return page->editorClient();
+    return 0;
+}
+
+void Editor::handleKeyboardEvent(KeyboardEvent* event)
+{
+    if (EditorClient* c = client())
+        if (selectionForCommand(event).isContentEditable())
+            c->handleKeyboardEvent(event);
+}
+
+void Editor::handleInputMethodKeydown(KeyboardEvent* event)
+{
+    if (EditorClient* c = client())
+        if (selectionForCommand(event).isContentEditable())
+            c->handleInputMethodKeydown(event);
+}
+
+bool Editor::canEdit() const
+{
+    return m_frame->selection()->isContentEditable();
+}
+
+bool Editor::canEditRichly() const
+{
+    return m_frame->selection()->isContentRichlyEditable();
+}
+
+// WinIE uses onbeforecut and onbeforepaste to enables the cut and paste menu items.  They
+// also send onbeforecopy, apparently for symmetry, but it doesn't affect the menu items.
+// We need to use onbeforecopy as a real menu enabler because we allow elements that are not
+// normally selectable to implement copy/paste (like divs, or a document body).
+
+bool Editor::canDHTMLCut()
+{
+    return !m_frame->selection()->isInPasswordField() && !dispatchCPPEvent(eventNames().beforecutEvent, ClipboardNumb);
+}
+
+bool Editor::canDHTMLCopy()
+{
+    return !m_frame->selection()->isInPasswordField() && !dispatchCPPEvent(eventNames().beforecopyEvent, ClipboardNumb);
+}
+
+bool Editor::canDHTMLPaste()
+{
+    return !dispatchCPPEvent(eventNames().beforepasteEvent, ClipboardNumb);
+}
+
+bool Editor::canCut() const
+{
+    return canCopy() && canDelete();
+}
+
+static HTMLImageElement* imageElementFromImageDocument(Document* document)
+{
+    if (!document)
+        return 0;
+    if (!document->isImageDocument())
+        return 0;
+    
+    HTMLElement* body = document->body();
+    if (!body)
+        return 0;
+    
+    Node* node = body->firstChild();
+    if (!node)
+        return 0;    
+    if (!node->hasTagName(imgTag))
+        return 0;
+    return static_cast<HTMLImageElement*>(node);
+}
+
+bool Editor::canCopy() const
+{
+    if (imageElementFromImageDocument(m_frame->document()))
+        return true;
+    SelectionController* selection = m_frame->selection();
+    return selection->isRange() && !selection->isInPasswordField();
+}
+
+bool Editor::canPaste() const
+{
+    return canEdit();
+}
+
+bool Editor::canDelete() const
+{
+    SelectionController* selection = m_frame->selection();
+    return selection->isRange() && selection->isContentEditable();
+}
+
+bool Editor::canDeleteRange(Range* range) const
+{
+    ExceptionCode ec = 0;
+    Node* startContainer = range->startContainer(ec);
+    Node* endContainer = range->endContainer(ec);
+    if (!startContainer || !endContainer)
+        return false;
+    
+    if (!startContainer->isContentEditable() || !endContainer->isContentEditable())
+        return false;
+    
+    if (range->collapsed(ec)) {
+        VisiblePosition start(startContainer, range->startOffset(ec), DOWNSTREAM);
+        VisiblePosition previous = start.previous();
+        // FIXME: We sometimes allow deletions at the start of editable roots, like when the caret is in an empty list item.
+        if (previous.isNull() || previous.deepEquivalent().node()->rootEditableElement() != startContainer->rootEditableElement())
+            return false;
+    }
+    return true;
+}
+
+bool Editor::smartInsertDeleteEnabled()
+{   
+    return client() && client()->smartInsertDeleteEnabled();
+}
+    
+bool Editor::canSmartCopyOrDelete()
+{
+    return client() && client()->smartInsertDeleteEnabled() && m_frame->selectionGranularity() == WordGranularity;
+}
+
+bool Editor::deleteWithDirection(SelectionController::EDirection direction, TextGranularity granularity, bool killRing, bool isTypingAction)
+{
+    // Delete the selection, if there is one.
+    // If not, make a selection using the passed-in direction and granularity.
+
+    if (!canEdit())
+        return false;
+
+    if (m_frame->selection()->isRange()) {
+        if (killRing)
+            addToKillRing(selectedRange().get(), false);
+        if (isTypingAction) {
+            if (m_frame->document()) {
+                TypingCommand::deleteKeyPressed(m_frame->document(), canSmartCopyOrDelete(), granularity);
+                revealSelectionAfterEditingOperation();
+            }
+        } else {
+            deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
+            // Implicitly calls revealSelectionAfterEditingOperation().
+        }
+    } else {
+        SelectionController selectionToDelete;
+        selectionToDelete.setSelection(m_frame->selection()->selection());
+        selectionToDelete.modify(SelectionController::EXTEND, direction, granularity);
+        if (killRing && selectionToDelete.isCaret() && granularity != CharacterGranularity)
+            selectionToDelete.modify(SelectionController::EXTEND, direction, CharacterGranularity);
+
+        RefPtr<Range> range = selectionToDelete.toRange();
+
+        if (killRing)
+            addToKillRing(range.get(), false);
+
+        if (!m_frame->selection()->setSelectedRange(range.get(), DOWNSTREAM, (granularity != CharacterGranularity)))
+            return true;
+
+        switch (direction) {
+            case SelectionController::FORWARD:
+            case SelectionController::RIGHT:
+                if (m_frame->document())
+                    TypingCommand::forwardDeleteKeyPressed(m_frame->document(), false, granularity);
+                break;
+            case SelectionController::BACKWARD:
+            case SelectionController::LEFT:
+                if (m_frame->document())
+                    TypingCommand::deleteKeyPressed(m_frame->document(), false, granularity);
+                break;
+        }
+        revealSelectionAfterEditingOperation();
+    }
+
+    // clear the "start new kill ring sequence" setting, because it was set to true
+    // when the selection was updated by deleting the range
+    if (killRing)
+        setStartNewKillRingSequence(false);
+
+    return true;
+}
+
+void Editor::deleteSelectionWithSmartDelete(bool smartDelete)
+{
+    if (m_frame->selection()->isNone())
+        return;
+    
+    applyCommand(DeleteSelectionCommand::create(m_frame->document(), smartDelete));
+}
+
+void Editor::pasteAsPlainTextWithPasteboard(Pasteboard* pasteboard)
+{
+    String text = pasteboard->plainText(m_frame);
+    if (client() && client()->shouldInsertText(text, selectedRange().get(), EditorInsertActionPasted))
+        replaceSelectionWithText(text, false, canSmartReplaceWithPasteboard(pasteboard));
+}
+
+void Editor::pasteWithPasteboard(Pasteboard* pasteboard, bool allowPlainText)
+{
+    RefPtr<Range> range = selectedRange();
+    bool chosePlainText;
+    RefPtr<DocumentFragment> fragment = pasteboard->documentFragment(m_frame, range, allowPlainText, chosePlainText);
+    if (fragment && shouldInsertFragment(fragment, range, EditorInsertActionPasted))
+        replaceSelectionWithFragment(fragment, false, canSmartReplaceWithPasteboard(pasteboard), chosePlainText);
+}
+
+bool Editor::canSmartReplaceWithPasteboard(Pasteboard* pasteboard)
+{
+    return client() && client()->smartInsertDeleteEnabled() && pasteboard->canSmartReplace();
+}
+
+bool Editor::shouldInsertFragment(PassRefPtr<DocumentFragment> fragment, PassRefPtr<Range> replacingDOMRange, EditorInsertAction givenAction)
+{
+    if (!client())
+        return false;
+        
+    Node* child = fragment->firstChild();
+    if (child && fragment->lastChild() == child && child->isCharacterDataNode())
+        return client()->shouldInsertText(static_cast<CharacterData*>(child)->data(), replacingDOMRange.get(), givenAction);
+
+    return client()->shouldInsertNode(fragment.get(), replacingDOMRange.get(), givenAction);
+}
+
+void Editor::replaceSelectionWithFragment(PassRefPtr<DocumentFragment> fragment, bool selectReplacement, bool smartReplace, bool matchStyle)
+{
+    if (m_frame->selection()->isNone() || !fragment)
+        return;
+    
+    applyCommand(ReplaceSelectionCommand::create(m_frame->document(), fragment, selectReplacement, smartReplace, matchStyle));
+    revealSelectionAfterEditingOperation();
+}
+
+void Editor::replaceSelectionWithText(const String& text, bool selectReplacement, bool smartReplace)
+{
+    replaceSelectionWithFragment(createFragmentFromText(selectedRange().get(), text), selectReplacement, smartReplace, true); 
+}
+
+PassRefPtr<Range> Editor::selectedRange()
+{
+    if (!m_frame)
+        return 0;
+    return m_frame->selection()->toRange();
+}
+
+bool Editor::shouldDeleteRange(Range* range) const
+{
+    ExceptionCode ec;
+    if (!range || range->collapsed(ec))
+        return false;
+    
+    if (!canDeleteRange(range))
+        return false;
+
+    return client() && client()->shouldDeleteRange(range);
+}
+
+bool Editor::tryDHTMLCopy()
+{   
+    if (m_frame->selection()->isInPasswordField())
+        return false;
+
+    // Must be done before oncopy adds types and data to the pboard,
+    // also done for security, as it erases data from the last copy/paste.
+    Pasteboard::generalPasteboard()->clear();
+
+    return !dispatchCPPEvent(eventNames().copyEvent, ClipboardWritable);
+}
+
+bool Editor::tryDHTMLCut()
+{
+    if (m_frame->selection()->isInPasswordField())
+        return false;
+
+    // Must be done before oncut adds types and data to the pboard,
+    // also done for security, as it erases data from the last copy/paste.
+    Pasteboard::generalPasteboard()->clear();
+
+    return !dispatchCPPEvent(eventNames().cutEvent, ClipboardWritable);
+}
+
+bool Editor::tryDHTMLPaste()
+{
+    return !dispatchCPPEvent(eventNames().pasteEvent, ClipboardReadable);
+}
+
+void Editor::writeSelectionToPasteboard(Pasteboard* pasteboard)
+{
+    pasteboard->writeSelection(selectedRange().get(), canSmartCopyOrDelete(), m_frame);
+}
+
+bool Editor::shouldInsertText(const String& text, Range* range, EditorInsertAction action) const
+{
+    return client() && client()->shouldInsertText(text, range, action);
+}
+
+bool Editor::shouldShowDeleteInterface(HTMLElement* element) const
+{
+    return client() && client()->shouldShowDeleteInterface(element);
+}
+
+void Editor::respondToChangedSelection(const Selection& oldSelection)
+{
+    if (client())
+        client()->respondToChangedSelection();
+    m_deleteButtonController->respondToChangedSelection(oldSelection);
+}
+
+void Editor::respondToChangedContents(const Selection& endingSelection)
+{
+    if (AXObjectCache::accessibilityEnabled()) {
+        Node* node = endingSelection.start().node();
+        if (node)
+            m_frame->document()->axObjectCache()->postNotification(node->renderer(), "AXValueChanged");
+    }
+    
+    if (client())
+        client()->respondToChangedContents();  
+}
+
+const SimpleFontData* Editor::fontForSelection(bool& hasMultipleFonts) const
+{
+#if !PLATFORM(QT)
+    hasMultipleFonts = false;
+
+    if (!m_frame->selection()->isRange()) {
+        Node* nodeToRemove;
+        RenderStyle* style = m_frame->styleForSelectionStart(nodeToRemove); // sets nodeToRemove
+
+        const SimpleFontData* result = 0;
+        if (style)
+            result = style->font().primaryFont();
+        
+        if (nodeToRemove) {
+            ExceptionCode ec;
+            nodeToRemove->remove(ec);
+            ASSERT(ec == 0);
+        }
+
+        return result;
+    }
+
+    const SimpleFontData* font = 0;
+
+    RefPtr<Range> range = m_frame->selection()->toRange();
+    Node* startNode = range->editingStartPosition().node();
+    if (startNode) {
+        Node* pastEnd = range->pastLastNode();
+        // In the loop below, n should eventually match pastEnd and not become nil, but we've seen at least one
+        // unreproducible case where this didn't happen, so check for nil also.
+        for (Node* n = startNode; n && n != pastEnd; n = n->traverseNextNode()) {
+            RenderObject *renderer = n->renderer();
+            if (!renderer)
+                continue;
+            // FIXME: Are there any node types that have renderers, but that we should be skipping?
+            const SimpleFontData* f = renderer->style()->font().primaryFont();
+            if (!font)
+                font = f;
+            else if (font != f) {
+                hasMultipleFonts = true;
+                break;
+            }
+        }
+    }
+
+    return font;
+#else
+    return 0;
+#endif
+}
+
+TriState Editor::selectionUnorderedListState() const
+{
+    if (m_frame->selection()->isCaret()) {
+        if (enclosingNodeWithTag(m_frame->selection()->selection().start(), ulTag))
+            return TrueTriState;
+    } else if (m_frame->selection()->isRange()) {
+        Node* startNode = enclosingNodeWithTag(m_frame->selection()->selection().start(), ulTag);
+        Node* endNode = enclosingNodeWithTag(m_frame->selection()->selection().end(), ulTag);
+        if (startNode && endNode && startNode == endNode)
+            return TrueTriState;
+    }
+
+    return FalseTriState;
+}
+
+TriState Editor::selectionOrderedListState() const
+{
+    if (m_frame->selection()->isCaret()) {
+        if (enclosingNodeWithTag(m_frame->selection()->selection().start(), olTag))
+            return TrueTriState;
+    } else if (m_frame->selection()->isRange()) {
+        Node* startNode = enclosingNodeWithTag(m_frame->selection()->selection().start(), olTag);
+        Node* endNode = enclosingNodeWithTag(m_frame->selection()->selection().end(), olTag);
+        if (startNode && endNode && startNode == endNode)
+            return TrueTriState;
+    }
+
+    return FalseTriState;
+}
+
+PassRefPtr<Node> Editor::insertOrderedList()
+{
+    if (!canEditRichly())
+        return 0;
+        
+    RefPtr<Node> newList = InsertListCommand::insertList(m_frame->document(), InsertListCommand::OrderedList);
+    revealSelectionAfterEditingOperation();
+    return newList;
+}
+
+PassRefPtr<Node> Editor::insertUnorderedList()
+{
+    if (!canEditRichly())
+        return 0;
+        
+    RefPtr<Node> newList = InsertListCommand::insertList(m_frame->document(), InsertListCommand::UnorderedList);
+    revealSelectionAfterEditingOperation();
+    return newList;
+}
+
+bool Editor::canIncreaseSelectionListLevel()
+{
+    return canEditRichly() && IncreaseSelectionListLevelCommand::canIncreaseSelectionListLevel(m_frame->document());
+}
+
+bool Editor::canDecreaseSelectionListLevel()
+{
+    return canEditRichly() && DecreaseSelectionListLevelCommand::canDecreaseSelectionListLevel(m_frame->document());
+}
+
+PassRefPtr<Node> Editor::increaseSelectionListLevel()
+{
+    if (!canEditRichly() || m_frame->selection()->isNone())
+        return 0;
+    
+    RefPtr<Node> newList = IncreaseSelectionListLevelCommand::increaseSelectionListLevel(m_frame->document());
+    revealSelectionAfterEditingOperation();
+    return newList;
+}
+
+PassRefPtr<Node> Editor::increaseSelectionListLevelOrdered()
+{
+    if (!canEditRichly() || m_frame->selection()->isNone())
+        return 0;
+    
+    PassRefPtr<Node> newList = IncreaseSelectionListLevelCommand::increaseSelectionListLevelOrdered(m_frame->document());
+    revealSelectionAfterEditingOperation();
+    return newList;
+}
+
+PassRefPtr<Node> Editor::increaseSelectionListLevelUnordered()
+{
+    if (!canEditRichly() || m_frame->selection()->isNone())
+        return 0;
+    
+    PassRefPtr<Node> newList = IncreaseSelectionListLevelCommand::increaseSelectionListLevelUnordered(m_frame->document());
+    revealSelectionAfterEditingOperation();
+    return newList;
+}
+
+void Editor::decreaseSelectionListLevel()
+{
+    if (!canEditRichly() || m_frame->selection()->isNone())
+        return;
+    
+    DecreaseSelectionListLevelCommand::decreaseSelectionListLevel(m_frame->document());
+    revealSelectionAfterEditingOperation();
+}
+
+void Editor::removeFormattingAndStyle()
+{
+    applyCommand(RemoveFormatCommand::create(m_frame->document()));
+}
+
+void Editor::clearLastEditCommand() 
+{
+    m_lastEditCommand.clear();
+}
+
+// Returns whether caller should continue with "the default processing", which is the same as 
+// the event handler NOT setting the return value to false
+bool Editor::dispatchCPPEvent(const AtomicString &eventType, ClipboardAccessPolicy policy)
+{
+    Node* target = m_frame->selection()->start().element();
+    if (!target && m_frame->document())
+        target = m_frame->document()->body();
+    if (!target)
+        return true;
+    target = target->shadowAncestorNode();
+    
+    RefPtr<Clipboard> clipboard = newGeneralClipboard(policy);
+
+    ExceptionCode ec = 0;
+    RefPtr<Event> evt = ClipboardEvent::create(eventType, true, true, clipboard);
+    EventTargetNodeCast(target)->dispatchEvent(evt, ec);
+    bool noDefaultProcessing = evt->defaultPrevented();
+
+    // invalidate clipboard here for security
+    clipboard->setAccessPolicy(ClipboardNumb);
+    
+    return !noDefaultProcessing;
+}
+
+void Editor::applyStyle(CSSStyleDeclaration* style, EditAction editingAction)
+{
+    switch (m_frame->selection()->state()) {
+        case Selection::NONE:
+            // do nothing
+            break;
+        case Selection::CARET:
+            m_frame->computeAndSetTypingStyle(style, editingAction);
+            break;
+        case Selection::RANGE:
+            if (m_frame->document() && style)
+                applyCommand(ApplyStyleCommand::create(m_frame->document(), style, editingAction));
+            break;
+    }
+}
+    
+bool Editor::shouldApplyStyle(CSSStyleDeclaration* style, Range* range)
+{   
+    return client()->shouldApplyStyle(style, range);
+}
+    
+void Editor::applyParagraphStyle(CSSStyleDeclaration* style, EditAction editingAction)
+{
+    switch (m_frame->selection()->state()) {
+        case Selection::NONE:
+            // do nothing
+            break;
+        case Selection::CARET:
+        case Selection::RANGE:
+            if (m_frame->document() && style)
+                applyCommand(ApplyStyleCommand::create(m_frame->document(), style, editingAction, ApplyStyleCommand::ForceBlockProperties));
+            break;
+    }
+}
+
+void Editor::applyStyleToSelection(CSSStyleDeclaration* style, EditAction editingAction)
+{
+    if (!style || style->length() == 0 || !canEditRichly())
+        return;
+
+    if (client() && client()->shouldApplyStyle(style, m_frame->selection()->toRange().get()))
+        applyStyle(style, editingAction);
+}
+
+void Editor::applyParagraphStyleToSelection(CSSStyleDeclaration* style, EditAction editingAction)
+{
+    if (!style || style->length() == 0 || !canEditRichly())
+        return;
+    
+    if (client() && client()->shouldApplyStyle(style, m_frame->selection()->toRange().get()))
+        applyParagraphStyle(style, editingAction);
+}
+
+bool Editor::clientIsEditable() const
+{
+    return client() && client()->isEditable();
+}
+
+bool Editor::selectionStartHasStyle(CSSStyleDeclaration* style) const
+{
+    Node* nodeToRemove;
+    RefPtr<CSSComputedStyleDeclaration> selectionStyle = m_frame->selectionComputedStyle(nodeToRemove);
+    if (!selectionStyle)
+        return false;
+    
+    RefPtr<CSSMutableStyleDeclaration> mutableStyle = style->makeMutable();
+    
+    bool match = true;
+    DeprecatedValueListConstIterator<CSSProperty> end;
+    for (DeprecatedValueListConstIterator<CSSProperty> it = mutableStyle->valuesIterator(); it != end; ++it) {
+        int propertyID = (*it).id();
+        if (!equalIgnoringCase(mutableStyle->getPropertyValue(propertyID), selectionStyle->getPropertyValue(propertyID))) {
+            match = false;
+            break;
+        }
+    }
+    
+    if (nodeToRemove) {
+        ExceptionCode ec = 0;
+        nodeToRemove->remove(ec);
+        ASSERT(ec == 0);
+    }
+    
+    return match;
+}
+
+static void updateState(CSSMutableStyleDeclaration* desiredStyle, CSSComputedStyleDeclaration* computedStyle, bool& atStart, TriState& state)
+{
+    DeprecatedValueListConstIterator<CSSProperty> end;
+    for (DeprecatedValueListConstIterator<CSSProperty> it = desiredStyle->valuesIterator(); it != end; ++it) {
+        int propertyID = (*it).id();
+        String desiredProperty = desiredStyle->getPropertyValue(propertyID);
+        String computedProperty = computedStyle->getPropertyValue(propertyID);
+        TriState propertyState = equalIgnoringCase(desiredProperty, computedProperty)
+            ? TrueTriState : FalseTriState;
+        if (atStart) {
+            state = propertyState;
+            atStart = false;
+        } else if (state != propertyState) {
+            state = MixedTriState;
+            break;
+        }
+    }
+}
+
+TriState Editor::selectionHasStyle(CSSStyleDeclaration* style) const
+{
+    bool atStart = true;
+    TriState state = FalseTriState;
+
+    RefPtr<CSSMutableStyleDeclaration> mutableStyle = style->makeMutable();
+
+    if (!m_frame->selection()->isRange()) {
+        Node* nodeToRemove;
+        RefPtr<CSSComputedStyleDeclaration> selectionStyle = m_frame->selectionComputedStyle(nodeToRemove);
+        if (!selectionStyle)
+            return FalseTriState;
+        updateState(mutableStyle.get(), selectionStyle.get(), atStart, state);
+        if (nodeToRemove) {
+            ExceptionCode ec = 0;
+            nodeToRemove->remove(ec);
+            ASSERT(ec == 0);
+        }
+    } else {
+        for (Node* node = m_frame->selection()->start().node(); node; node = node->traverseNextNode()) {
+            RefPtr<CSSComputedStyleDeclaration> nodeStyle = computedStyle(node);
+            if (nodeStyle)
+                updateState(mutableStyle.get(), nodeStyle.get(), atStart, state);
+            if (state == MixedTriState)
+                break;
+            if (node == m_frame->selection()->end().node())
+                break;
+        }
+    }
+
+    return state;
+}
+void Editor::indent()
+{
+    applyCommand(IndentOutdentCommand::create(m_frame->document(), IndentOutdentCommand::Indent));
+}
+
+void Editor::outdent()
+{
+    applyCommand(IndentOutdentCommand::create(m_frame->document(), IndentOutdentCommand::Outdent));
+}
+
+static void dispatchEditableContentChangedEvents(const EditCommand& command)
+{
+    Element* startRoot = command.startingRootEditableElement();
+    Element* endRoot = command.endingRootEditableElement();
+    ExceptionCode ec;
+    if (startRoot)
+        startRoot->dispatchEvent(Event::create(eventNames().webkitEditableContentChangedEvent, false, false), ec);
+    if (endRoot && endRoot != startRoot)
+        endRoot->dispatchEvent(Event::create(eventNames().webkitEditableContentChangedEvent, false, false), ec);
+}
+
+void Editor::appliedEditing(PassRefPtr<EditCommand> cmd)
+{
+    dispatchEditableContentChangedEvents(*cmd);
+    
+    Selection newSelection(cmd->endingSelection());
+    // If there is no selection change, don't bother sending shouldChangeSelection, but still call setSelection,
+    // because there is work that it must do in this situation.
+    // The old selection can be invalid here and calling shouldChangeSelection can produce some strange calls.
+    // See <rdar://problem/5729315> Some shouldChangeSelectedDOMRange contain Ranges for selections that are no longer valid
+    // Don't clear the typing style or removedAnchor with this selection change.  We do those things elsewhere if necessary.
+    if (newSelection == m_frame->selection()->selection() || m_frame->shouldChangeSelection(newSelection))
+        m_frame->selection()->setSelection(newSelection, false, false);
+        
+    if (!cmd->preservesTypingStyle())
+        m_frame->setTypingStyle(0);
+    
+    // Command will be equal to last edit command only in the case of typing
+    if (m_lastEditCommand.get() == cmd)
+        ASSERT(cmd->isTypingCommand());
+    else {
+        // Only register a new undo command if the command passed in is
+        // different from the last command
+        m_lastEditCommand = cmd;
+        if (client())
+            client()->registerCommandForUndo(m_lastEditCommand);
+    }
+    respondToChangedContents(newSelection);    
+}
+
+void Editor::unappliedEditing(PassRefPtr<EditCommand> cmd)
+{
+    dispatchEditableContentChangedEvents(*cmd);
+    
+    Selection newSelection(cmd->startingSelection());
+    // If there is no selection change, don't bother sending shouldChangeSelection, but still call setSelection,
+    // because there is work that it must do in this situation.
+    // The old selection can be invalid here and calling shouldChangeSelection can produce some strange calls.
+    // See <rdar://problem/5729315> Some shouldChangeSelectedDOMRange contain Ranges for selections that are no longer valid
+    if (newSelection == m_frame->selection()->selection() || m_frame->shouldChangeSelection(newSelection))
+        m_frame->selection()->setSelection(newSelection, true);
+    
+    m_lastEditCommand = 0;
+    if (client())
+        client()->registerCommandForRedo(cmd);
+    respondToChangedContents(newSelection);    
+}
+
+void Editor::reappliedEditing(PassRefPtr<EditCommand> cmd)
+{
+    dispatchEditableContentChangedEvents(*cmd);
+    
+    Selection newSelection(cmd->endingSelection());
+    // If there is no selection change, don't bother sending shouldChangeSelection, but still call setSelection,
+    // because there is work that it must do in this situation.
+    // The old selection can be invalid here and calling shouldChangeSelection can produce some strange calls.
+    // See <rdar://problem/5729315> Some shouldChangeSelectedDOMRange contain Ranges for selections that are no longer valid
+    if (newSelection == m_frame->selection()->selection() || m_frame->shouldChangeSelection(newSelection))
+        m_frame->selection()->setSelection(newSelection, true);
+    
+    m_lastEditCommand = 0;
+    if (client())
+        client()->registerCommandForUndo(cmd);
+    respondToChangedContents(newSelection);    
+}
+
+Editor::Editor(Frame* frame)
+    : m_frame(frame)
+    , m_deleteButtonController(new DeleteButtonController(frame))
+    , m_ignoreCompositionSelectionChange(false)
+    , m_shouldStartNewKillRingSequence(false)
+{ 
+}
+
+Editor::~Editor()
+{
+}
+
+void Editor::clear()
+{
+    m_compositionNode = 0;
+    m_customCompositionUnderlines.clear();
+}
+
+bool Editor::insertText(const String& text, Event* triggeringEvent)
+{
+    return m_frame->eventHandler()->handleTextInputEvent(text, triggeringEvent);
+}
+
+bool Editor::insertTextWithoutSendingTextEvent(const String& text, bool selectInsertedText, Event* triggeringEvent)
+{
+    if (text.isEmpty())
+        return false;
+
+    Selection selection = selectionForCommand(triggeringEvent);
+    if (!selection.isContentEditable())
+        return false;
+    RefPtr<Range> range = selection.toRange();
+
+    if (!shouldInsertText(text, range.get(), EditorInsertActionTyped))
+        return true;
+
+    // Get the selection to use for the event that triggered this insertText.
+    // If the event handler changed the selection, we may want to use a different selection
+    // that is contained in the event target.
+    selection = selectionForCommand(triggeringEvent);
+    if (selection.isContentEditable()) {
+        if (Node* selectionStart = selection.start().node()) {
+            RefPtr<Document> document = selectionStart->document();
+            
+            // Insert the text
+            TypingCommand::insertText(document.get(), text, selection, selectInsertedText);
+
+            // Reveal the current selection 
+            if (Frame* editedFrame = document->frame())
+                if (Page* page = editedFrame->page())
+                    page->focusController()->focusedOrMainFrame()->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
+        }
+    }
+
+    return true;
+}
+
+bool Editor::insertLineBreak()
+{
+    if (!canEdit())
+        return false;
+
+    if (!shouldInsertText("\n", m_frame->selection()->toRange().get(), EditorInsertActionTyped))
+        return true;
+
+    TypingCommand::insertLineBreak(m_frame->document());
+    revealSelectionAfterEditingOperation();
+    return true;
+}
+
+bool Editor::insertParagraphSeparator()
+{
+    if (!canEdit())
+        return false;
+
+    if (!canEditRichly())
+        return insertLineBreak();
+
+    if (!shouldInsertText("\n", m_frame->selection()->toRange().get(), EditorInsertActionTyped))
+        return true;
+
+    TypingCommand::insertParagraphSeparator(m_frame->document());
+    revealSelectionAfterEditingOperation();
+    return true;
+}
+
+void Editor::cut()
+{
+    if (tryDHTMLCut())
+        return; // DHTML did the whole operation
+    if (!canCut()) {
+        systemBeep();
+        return;
+    }
+    RefPtr<Range> selection = selectedRange();
+    if (shouldDeleteRange(selection.get())) {
+        Pasteboard::generalPasteboard()->writeSelection(selection.get(), canSmartCopyOrDelete(), m_frame);
+        didWriteSelectionToPasteboard();
+        deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
+    }
+}
+
+void Editor::copy()
+{
+    if (tryDHTMLCopy())
+        return; // DHTML did the whole operation
+    if (!canCopy()) {
+        systemBeep();
+        return;
+    }
+    
+    Document* document = m_frame->document();
+    if (HTMLImageElement* imageElement = imageElementFromImageDocument(document))
+        Pasteboard::generalPasteboard()->writeImage(imageElement, document->url(), document->title());
+    else
+        Pasteboard::generalPasteboard()->writeSelection(selectedRange().get(), canSmartCopyOrDelete(), m_frame);
+    
+    didWriteSelectionToPasteboard();
+}
+
+#if !PLATFORM(MAC)
+
+void Editor::paste()
+{
+    ASSERT(m_frame->document());
+    if (tryDHTMLPaste())
+        return;     // DHTML did the whole operation
+    if (!canPaste())
+        return;
+    DocLoader* loader = m_frame->document()->docLoader();
+    loader->setAllowStaleResources(true);
+    if (m_frame->selection()->isContentRichlyEditable())
+        pasteWithPasteboard(Pasteboard::generalPasteboard(), true);
+    else
+        pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
+    loader->setAllowStaleResources(false);
+}
+
+#endif
+
+void Editor::pasteAsPlainText()
+{
+   if (!canPaste())
+        return;
+   pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
+}
+
+void Editor::performDelete()
+{
+    if (!canDelete()) {
+        systemBeep();
+        return;
+    }
+
+    addToKillRing(selectedRange().get(), false);
+    deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
+
+    // clear the "start new kill ring sequence" setting, because it was set to true
+    // when the selection was updated by deleting the range
+    setStartNewKillRingSequence(false);
+}
+
+void Editor::copyURL(const KURL& url, const String& title)
+{
+    Pasteboard::generalPasteboard()->writeURL(url, title, m_frame);
+}
+
+void Editor::copyImage(const HitTestResult& result)
+{
+    KURL url = result.absoluteLinkURL();
+    if (url.isEmpty())
+        url = result.absoluteImageURL();
+
+    Pasteboard::generalPasteboard()->writeImage(result.innerNonSharedNode(), url, result.altDisplayString());
+}
+
+bool Editor::isContinuousSpellCheckingEnabled()
+{
+    return client() && client()->isContinuousSpellCheckingEnabled();
+}
+
+void Editor::toggleContinuousSpellChecking()
+{
+    if (client())
+        client()->toggleContinuousSpellChecking();
+}
+
+bool Editor::isGrammarCheckingEnabled()
+{
+    return client() && client()->isGrammarCheckingEnabled();
+}
+
+void Editor::toggleGrammarChecking()
+{
+    if (client())
+        client()->toggleGrammarChecking();
+}
+
+int Editor::spellCheckerDocumentTag()
+{
+    return client() ? client()->spellCheckerDocumentTag() : 0;
+}
+
+bool Editor::shouldEndEditing(Range* range)
+{
+    return client() && client()->shouldEndEditing(range);
+}
+
+bool Editor::shouldBeginEditing(Range* range)
+{
+    return client() && client()->shouldBeginEditing(range);
+}
+
+void Editor::clearUndoRedoOperations()
+{
+    if (client())
+        client()->clearUndoRedoOperations();
+}
+
+bool Editor::canUndo()
+{
+    return client() && client()->canUndo();
+}
+
+void Editor::undo()
+{
+    if (client())
+        client()->undo();
+}
+
+bool Editor::canRedo()
+{
+    return client() && client()->canRedo();
+}
+
+void Editor::redo()
+{
+    if (client())
+        client()->redo();
+}
+
+void Editor::didBeginEditing()
+{
+    if (client())
+        client()->didBeginEditing();
+}
+
+void Editor::didEndEditing()
+{
+    if (client())
+        client()->didEndEditing();
+}
+
+void Editor::didWriteSelectionToPasteboard()
+{
+    if (client())
+        client()->didWriteSelectionToPasteboard();
+}
+
+void Editor::toggleBold()
+{
+    command("ToggleBold").execute();
+}
+
+void Editor::toggleUnderline()
+{
+    command("ToggleUnderline").execute();
+}
+
+void Editor::setBaseWritingDirection(WritingDirection direction)
+{
+    Node* focusedNode = frame()->document()->focusedNode();
+    if (focusedNode && (focusedNode->hasTagName(textareaTag)
+                        || focusedNode->hasTagName(inputTag) && (static_cast<HTMLInputElement*>(focusedNode)->inputType() == HTMLInputElement::TEXT
+                                                                || static_cast<HTMLInputElement*>(focusedNode)->inputType() == HTMLInputElement::SEARCH))) {
+        if (direction == NaturalWritingDirection)
+            return;
+        static_cast<HTMLElement*>(focusedNode)->setAttribute(dirAttr, direction == LeftToRightWritingDirection ? "ltr" : "rtl");
+        frame()->document()->updateRendering();
+        return;
+    }
+
+    RefPtr<CSSMutableStyleDeclaration> style = CSSMutableStyleDeclaration::create();
+    style->setProperty(CSSPropertyDirection, direction == LeftToRightWritingDirection ? "ltr" : direction == RightToLeftWritingDirection ? "rtl" : "inherit", false);
+    applyParagraphStyleToSelection(style.get(), EditActionSetWritingDirection);
+}
+
+void Editor::selectComposition()
+{
+    RefPtr<Range> range = compositionRange();
+    if (!range)
+        return;
+    
+    // The composition can start inside a composed character sequence, so we have to override checks.
+    // See <http://bugs.webkit.org/show_bug.cgi?id=15781>
+    Selection selection;
+    selection.setWithoutValidation(range->startPosition(), range->endPosition());
+    m_frame->selection()->setSelection(selection, false, false);
+}
+
+void Editor::confirmComposition()
+{
+    if (!m_compositionNode)
+        return;
+    confirmComposition(m_compositionNode->data().substring(m_compositionStart, m_compositionEnd - m_compositionStart), false);
+}
+
+void Editor::confirmCompositionWithoutDisturbingSelection()
+{
+    if (!m_compositionNode)
+        return;
+    confirmComposition(m_compositionNode->data().substring(m_compositionStart, m_compositionEnd - m_compositionStart), true);
+}
+
+void Editor::confirmComposition(const String& text)
+{
+    confirmComposition(text, false);
+}
+
+void Editor::confirmComposition(const String& text, bool preserveSelection)
+{
+    setIgnoreCompositionSelectionChange(true);
+
+    Selection oldSelection = m_frame->selection()->selection();
+
+    selectComposition();
+
+    if (m_frame->selection()->isNone()) {
+        setIgnoreCompositionSelectionChange(false);
+        return;
+    }
+    
+    // If text is empty, then delete the old composition here.  If text is non-empty, InsertTextCommand::input
+    // will delete the old composition with an optimized replace operation.
+    if (text.isEmpty())
+        TypingCommand::deleteSelection(m_frame->document(), false);
+
+    m_compositionNode = 0;
+    m_customCompositionUnderlines.clear();
+
+    insertText(text, 0);
+
+    if (preserveSelection)
+        m_frame->selection()->setSelection(oldSelection, false, false);
+
+    setIgnoreCompositionSelectionChange(false);
+}
+
+void Editor::setComposition(const String& text, const Vector<CompositionUnderline>& underlines, unsigned selectionStart, unsigned selectionEnd)
+{
+    setIgnoreCompositionSelectionChange(true);
+
+    selectComposition();
+
+    if (m_frame->selection()->isNone()) {
+        setIgnoreCompositionSelectionChange(false);
+        return;
+    }
+    
+    // If text is empty, then delete the old composition here.  If text is non-empty, InsertTextCommand::input
+    // will delete the old composition with an optimized replace operation.
+    if (text.isEmpty())
+        TypingCommand::deleteSelection(m_frame->document(), false);
+
+    m_compositionNode = 0;
+    m_customCompositionUnderlines.clear();
+
+    if (!text.isEmpty()) {
+        TypingCommand::insertText(m_frame->document(), text, true, true);
+
+        Node* baseNode = m_frame->selection()->base().node();
+        unsigned baseOffset = m_frame->selection()->base().offset();
+        Node* extentNode = m_frame->selection()->extent().node();
+        unsigned extentOffset = m_frame->selection()->extent().offset();
+
+        if (baseNode && baseNode == extentNode && baseNode->isTextNode() && baseOffset + text.length() == extentOffset) {
+            m_compositionNode = static_cast<Text*>(baseNode);
+            m_compositionStart = baseOffset;
+            m_compositionEnd = extentOffset;
+            m_customCompositionUnderlines = underlines;
+            size_t numUnderlines = m_customCompositionUnderlines.size();
+            for (size_t i = 0; i < numUnderlines; ++i) {
+                m_customCompositionUnderlines[i].startOffset += baseOffset;
+                m_customCompositionUnderlines[i].endOffset += baseOffset;
+            }
+            if (baseNode->renderer())
+                baseNode->renderer()->repaint();
+
+            unsigned start = min(baseOffset + selectionStart, extentOffset);
+            unsigned end = min(max(start, baseOffset + selectionEnd), extentOffset);
+            RefPtr<Range> selectedRange = Range::create(baseNode->document(), baseNode, start, baseNode, end);                
+            m_frame->selection()->setSelectedRange(selectedRange.get(), DOWNSTREAM, false);
+        }
+    }
+
+    setIgnoreCompositionSelectionChange(false);
+}
+
+void Editor::ignoreSpelling()
+{
+    if (!client())
+        return;
+        
+    RefPtr<Range> selectedRange = frame()->selection()->toRange();
+    if (selectedRange)
+        frame()->document()->removeMarkers(selectedRange.get(), DocumentMarker::Spelling);
+
+    String text = frame()->selectedText();
+    ASSERT(text.length() != 0);
+    client()->ignoreWordInSpellDocument(text);
+}
+
+void Editor::learnSpelling()
+{
+    if (!client())
+        return;
+        
+    // FIXME: We don't call this on the Mac, and it should remove misppelling markers around the 
+    // learned word, see <rdar://problem/5396072>.
+
+    String text = frame()->selectedText();
+    ASSERT(text.length() != 0);
+    client()->learnWord(text);
+}
+
+static String findFirstMisspellingInRange(EditorClient* client, Range* searchRange, int& firstMisspellingOffset, bool markAll)
+{
+    ASSERT_ARG(client, client);
+    ASSERT_ARG(searchRange, searchRange);
+    
+    WordAwareIterator it(searchRange);
+    firstMisspellingOffset = 0;
+    
+    String firstMisspelling;
+    int currentChunkOffset = 0;
+
+    while (!it.atEnd()) {
+        const UChar* chars = it.characters();
+        int len = it.length();
+        
+        // Skip some work for one-space-char hunks
+        if (!(len == 1 && chars[0] == ' ')) {
+            
+            int misspellingLocation = -1;
+            int misspellingLength = 0;
+            client->checkSpellingOfString(chars, len, &misspellingLocation, &misspellingLength);
+
+            // 5490627 shows that there was some code path here where the String constructor below crashes.
+            // We don't know exactly what combination of bad input caused this, so we're making this much
+            // more robust against bad input on release builds.
+            ASSERT(misspellingLength >= 0);
+            ASSERT(misspellingLocation >= -1);
+            ASSERT(misspellingLength == 0 || misspellingLocation >= 0);
+            ASSERT(misspellingLocation < len);
+            ASSERT(misspellingLength <= len);
+            ASSERT(misspellingLocation + misspellingLength <= len);
+            
+            if (misspellingLocation >= 0 && misspellingLength > 0 && misspellingLocation < len && misspellingLength <= len && misspellingLocation + misspellingLength <= len) {
+                
+                // Remember first-encountered misspelling and its offset
+                if (!firstMisspelling) {
+                    firstMisspellingOffset = currentChunkOffset + misspellingLocation;
+                    firstMisspelling = String(chars + misspellingLocation, misspellingLength);
+                }
+                
+                // Mark this instance if we're marking all instances. Otherwise bail out because we found the first one.
+                if (!markAll)
+                    break;
+                
+                // Compute range of misspelled word
+                RefPtr<Range> misspellingRange = TextIterator::subrange(searchRange, currentChunkOffset + misspellingLocation, misspellingLength);
+                
+                // Store marker for misspelled word
+                ExceptionCode ec = 0;
+                misspellingRange->startContainer(ec)->document()->addMarker(misspellingRange.get(), DocumentMarker::Spelling);
+                ASSERT(ec == 0);
+            }
+        }
+        
+        currentChunkOffset += len;
+        it.advance();
+    }
+    
+    return firstMisspelling;
+}
+
+#ifndef BUILDING_ON_TIGER
+
+static PassRefPtr<Range> paragraphAlignedRangeForRange(Range* arbitraryRange, int& offsetIntoParagraphAlignedRange, String& paragraphString)
+{
+    ASSERT_ARG(arbitraryRange, arbitraryRange);
+    
+    ExceptionCode ec = 0;
+    
+    // Expand range to paragraph boundaries
+    RefPtr<Range> paragraphRange = arbitraryRange->cloneRange(ec);
+    setStart(paragraphRange.get(), startOfParagraph(arbitraryRange->startPosition()));
+    setEnd(paragraphRange.get(), endOfParagraph(arbitraryRange->endPosition()));
+    
+    // Compute offset from start of expanded range to start of original range
+    RefPtr<Range> offsetAsRange = Range::create(paragraphRange->startContainer(ec)->document(), paragraphRange->startPosition(), arbitraryRange->startPosition());
+    offsetIntoParagraphAlignedRange = TextIterator::rangeLength(offsetAsRange.get());
+    
+    // Fill in out parameter with string representing entire paragraph range.
+    // Someday we might have a caller that doesn't use this, but for now all callers do.
+    paragraphString = plainText(paragraphRange.get());
+
+    return paragraphRange;
+}
+
+static int findFirstGrammarDetailInRange(const Vector<GrammarDetail>& grammarDetails, int badGrammarPhraseLocation, int badGrammarPhraseLength, Range *searchRange, int startOffset, int endOffset, bool markAll)
+{
+    // Found some bad grammar. Find the earliest detail range that starts in our search range (if any).
+    // Optionally add a DocumentMarker for each detail in the range.
+    int earliestDetailLocationSoFar = -1;
+    int earliestDetailIndex = -1;
+    for (unsigned i = 0; i < grammarDetails.size(); i++) {
+        const GrammarDetail* detail = &grammarDetails[i];
+        ASSERT(detail->length > 0 && detail->location >= 0);
+        
+        int detailStartOffsetInParagraph = badGrammarPhraseLocation + detail->location;
+        
+        // Skip this detail if it starts before the original search range
+        if (detailStartOffsetInParagraph < startOffset)
+            continue;
+        
+        // Skip this detail if it starts after the original search range
+        if (detailStartOffsetInParagraph >= endOffset)
+            continue;
+        
+        if (markAll) {
+            RefPtr<Range> badGrammarRange = TextIterator::subrange(searchRange, badGrammarPhraseLocation - startOffset + detail->location, detail->length);
+            ExceptionCode ec = 0;
+            badGrammarRange->startContainer(ec)->document()->addMarker(badGrammarRange.get(), DocumentMarker::Grammar, detail->userDescription);
+            ASSERT(ec == 0);
+        }
+        
+        // Remember this detail only if it's earlier than our current candidate (the details aren't in a guaranteed order)
+        if (earliestDetailIndex < 0 || earliestDetailLocationSoFar > detail->location) {
+            earliestDetailIndex = i;
+            earliestDetailLocationSoFar = detail->location;
+        }
+    }
+    
+    return earliestDetailIndex;
+}
+    
+static String findFirstBadGrammarInRange(EditorClient* client, Range* searchRange, GrammarDetail& outGrammarDetail, int& outGrammarPhraseOffset, bool markAll)
+{
+    ASSERT_ARG(client, client);
+    ASSERT_ARG(searchRange, searchRange);
+    
+    // Initialize out parameters; these will be updated if we find something to return.
+    outGrammarDetail.location = -1;
+    outGrammarDetail.length = 0;
+    outGrammarDetail.guesses.clear();
+    outGrammarDetail.userDescription = "";
+    outGrammarPhraseOffset = 0;
+    
+    String firstBadGrammarPhrase;
+
+    // Expand the search range to encompass entire paragraphs, since grammar checking needs that much context.
+    // Determine the character offset from the start of the paragraph to the start of the original search range,
+    // since we will want to ignore results in this area.
+    int searchRangeStartOffset;
+    String paragraphString;
+    RefPtr<Range> paragraphRange = paragraphAlignedRangeForRange(searchRange, searchRangeStartOffset, paragraphString);
+        
+    // Determine the character offset from the start of the paragraph to the end of the original search range, 
+    // since we will want to ignore results in this area also.
+    int searchRangeEndOffset = searchRangeStartOffset + TextIterator::rangeLength(searchRange);
+        
+    // Start checking from beginning of paragraph, but skip past results that occur before the start of the original search range.
+    int startOffset = 0;
+    while (startOffset < searchRangeEndOffset) {
+        Vector<GrammarDetail> grammarDetails;
+        int badGrammarPhraseLocation = -1;
+        int badGrammarPhraseLength = 0;
+        client->checkGrammarOfString(paragraphString.characters() + startOffset, paragraphString.length() - startOffset, grammarDetails, &badGrammarPhraseLocation, &badGrammarPhraseLength);
+        
+        if (badGrammarPhraseLength == 0) {
+            ASSERT(badGrammarPhraseLocation == -1);
+            return String();
+        }
+
+        ASSERT(badGrammarPhraseLocation >= 0);
+        badGrammarPhraseLocation += startOffset;
+
+        
+        // Found some bad grammar. Find the earliest detail range that starts in our search range (if any).
+        int badGrammarIndex = findFirstGrammarDetailInRange(grammarDetails, badGrammarPhraseLocation, badGrammarPhraseLength, searchRange, searchRangeStartOffset, searchRangeEndOffset, markAll);
+        if (badGrammarIndex >= 0) {
+            ASSERT(static_cast<unsigned>(badGrammarIndex) < grammarDetails.size());
+            outGrammarDetail = grammarDetails[badGrammarIndex];
+        }
+
+        // If we found a detail in range, then we have found the first bad phrase (unless we found one earlier but
+        // kept going so we could mark all instances).
+        if (badGrammarIndex >= 0 && firstBadGrammarPhrase.isEmpty()) {
+            outGrammarPhraseOffset = badGrammarPhraseLocation - searchRangeStartOffset;
+            firstBadGrammarPhrase = paragraphString.substring(badGrammarPhraseLocation, badGrammarPhraseLength);
+            
+            // Found one. We're done now, unless we're marking each instance.
+            if (!markAll)
+                break;
+        }
+
+        // These results were all between the start of the paragraph and the start of the search range; look
+        // beyond this phrase.
+        startOffset = badGrammarPhraseLocation + badGrammarPhraseLength;
+    }
+    
+    return firstBadGrammarPhrase;
+}
+    
+#endif /* not BUILDING_ON_TIGER */
+
+void Editor::advanceToNextMisspelling(bool startBeforeSelection)
+{
+    ExceptionCode ec = 0;
+
+    // The basic approach is to search in two phases - from the selection end to the end of the doc, and
+    // then we wrap and search from the doc start to (approximately) where we started.
+    
+    // Start at the end of the selection, search to edge of document.  Starting at the selection end makes
+    // repeated "check spelling" commands work.
+    Selection selection(frame()->selection()->selection());
+    RefPtr<Range> spellingSearchRange(rangeOfContents(frame()->document()));
+    bool startedWithSelection = false;
+    if (selection.start().node()) {
+        startedWithSelection = true;
+        if (startBeforeSelection) {
+            VisiblePosition start(selection.visibleStart());
+            // We match AppKit's rule: Start 1 character before the selection.
+            VisiblePosition oneBeforeStart = start.previous();
+            setStart(spellingSearchRange.get(), oneBeforeStart.isNotNull() ? oneBeforeStart : start);
+        } else
+            setStart(spellingSearchRange.get(), selection.visibleEnd());
+    }
+
+    Position position = spellingSearchRange->startPosition();
+    if (!isEditablePosition(position)) {
+        // This shouldn't happen in very often because the Spelling menu items aren't enabled unless the
+        // selection is editable.
+        // This can happen in Mail for a mix of non-editable and editable content (like Stationary), 
+        // when spell checking the whole document before sending the message.
+        // In that case the document might not be editable, but there are editable pockets that need to be spell checked.
+
+        position = firstEditablePositionAfterPositionInRoot(position, frame()->document()->documentElement()).deepEquivalent();
+        if (position.isNull())
+            return;
+        
+        Position rangeCompliantPosition = rangeCompliantEquivalent(position);
+        spellingSearchRange->setStart(rangeCompliantPosition.node(), rangeCompliantPosition.offset(), ec);
+        startedWithSelection = false;   // won't need to wrap
+    }
+    
+    // topNode defines the whole range we want to operate on 
+    Node* topNode = highestEditableRoot(position);
+    spellingSearchRange->setEnd(topNode, maxDeepOffset(topNode), ec);
+
+    // If spellingSearchRange starts in the middle of a word, advance to the next word so we start checking
+    // at a word boundary. Going back by one char and then forward by a word does the trick.
+    if (startedWithSelection) {
+        VisiblePosition oneBeforeStart = startVisiblePosition(spellingSearchRange.get(), DOWNSTREAM).previous();
+        if (oneBeforeStart.isNotNull()) {
+            setStart(spellingSearchRange.get(), endOfWord(oneBeforeStart));
+        } // else we were already at the start of the editable node
+    }
+    
+    if (spellingSearchRange->collapsed(ec))
+        return;       // nothing to search in
+    
+    // Get the spell checker if it is available
+    if (!client())
+        return;
+        
+    // We go to the end of our first range instead of the start of it, just to be sure
+    // we don't get foiled by any word boundary problems at the start.  It means we might
+    // do a tiny bit more searching.
+    Node *searchEndNodeAfterWrap = spellingSearchRange->endContainer(ec);
+    int searchEndOffsetAfterWrap = spellingSearchRange->endOffset(ec);
+    
+    int misspellingOffset;
+    String misspelledWord = findFirstMisspellingInRange(client(), spellingSearchRange.get(), misspellingOffset, false);
+    
+    String badGrammarPhrase;
+
+#ifndef BUILDING_ON_TIGER
+    int grammarPhraseOffset = 0;
+    GrammarDetail grammarDetail;
+
+    // Search for bad grammar that occurs prior to the next misspelled word (if any)
+    RefPtr<Range> grammarSearchRange = spellingSearchRange->cloneRange(ec);
+    if (!misspelledWord.isEmpty()) {
+        // Stop looking at start of next misspelled word
+        CharacterIterator chars(grammarSearchRange.get());
+        chars.advance(misspellingOffset);
+        grammarSearchRange->setEnd(chars.range()->startContainer(ec), chars.range()->startOffset(ec), ec);
+    }
+    
+    if (isGrammarCheckingEnabled())
+        badGrammarPhrase = findFirstBadGrammarInRange(client(), grammarSearchRange.get(), grammarDetail, grammarPhraseOffset, false);
+#endif
+    
+    // If we found neither bad grammar nor a misspelled word, wrap and try again (but don't bother if we started at the beginning of the
+    // block rather than at a selection).
+    if (startedWithSelection && !misspelledWord && !badGrammarPhrase) {
+        spellingSearchRange->setStart(topNode, 0, ec);
+        // going until the end of the very first chunk we tested is far enough
+        spellingSearchRange->setEnd(searchEndNodeAfterWrap, searchEndOffsetAfterWrap, ec);
+        
+        misspelledWord = findFirstMisspellingInRange(client(), spellingSearchRange.get(), misspellingOffset, false);
+
+#ifndef BUILDING_ON_TIGER
+        grammarSearchRange = spellingSearchRange->cloneRange(ec);
+        if (!misspelledWord.isEmpty()) {
+            // Stop looking at start of next misspelled word
+            CharacterIterator chars(grammarSearchRange.get());
+            chars.advance(misspellingOffset);
+            grammarSearchRange->setEnd(chars.range()->startContainer(ec), chars.range()->startOffset(ec), ec);
+        }
+        if (isGrammarCheckingEnabled())
+            badGrammarPhrase = findFirstBadGrammarInRange(client(), grammarSearchRange.get(), grammarDetail, grammarPhraseOffset, false);
+#endif
+    }
+    
+    if (!badGrammarPhrase.isEmpty()) {
+#ifdef BUILDING_ON_TIGER
+        ASSERT_NOT_REACHED();
+#else
+        // We found bad grammar. Since we only searched for bad grammar up to the first misspelled word, the bad grammar
+        // takes precedence and we ignore any potential misspelled word. Select the grammar detail, update the spelling
+        // panel, and store a marker so we draw the green squiggle later.
+        
+        ASSERT(badGrammarPhrase.length() > 0);
+        ASSERT(grammarDetail.location != -1 && grammarDetail.length > 0);
+        
+        // FIXME 4859190: This gets confused with doubled punctuation at the end of a paragraph
+        RefPtr<Range> badGrammarRange = TextIterator::subrange(grammarSearchRange.get(), grammarPhraseOffset + grammarDetail.location, grammarDetail.length);
+        frame()->selection()->setSelection(Selection(badGrammarRange.get(), SEL_DEFAULT_AFFINITY));
+        frame()->revealSelection();
+        
+        client()->updateSpellingUIWithGrammarString(badGrammarPhrase, grammarDetail);
+        frame()->document()->addMarker(badGrammarRange.get(), DocumentMarker::Grammar, grammarDetail.userDescription);
+#endif        
+    } else if (!misspelledWord.isEmpty()) {
+        // We found a misspelling, but not any earlier bad grammar. Select the misspelling, update the spelling panel, and store
+        // a marker so we draw the red squiggle later.
+        
+        RefPtr<Range> misspellingRange = TextIterator::subrange(spellingSearchRange.get(), misspellingOffset, misspelledWord.length());
+        frame()->selection()->setSelection(Selection(misspellingRange.get(), DOWNSTREAM));
+        frame()->revealSelection();
+        
+        client()->updateSpellingUIWithMisspelledWord(misspelledWord);
+        frame()->document()->addMarker(misspellingRange.get(), DocumentMarker::Spelling);
+    }
+}
+
+bool Editor::isSelectionMisspelled()
+{
+    String selectedString = frame()->selectedText();
+    int length = selectedString.length();
+    if (length == 0)
+        return false;
+
+    if (!client())
+        return false;
+    
+    int misspellingLocation = -1;
+    int misspellingLength = 0;
+    client()->checkSpellingOfString(selectedString.characters(), length, &misspellingLocation, &misspellingLength);
+    
+    // The selection only counts as misspelled if the selected text is exactly one misspelled word
+    if (misspellingLength != length)
+        return false;
+    
+    // Update the spelling panel to be displaying this error (whether or not the spelling panel is on screen).
+    // This is necessary to make a subsequent call to [NSSpellChecker ignoreWord:inSpellDocumentWithTag:] work
+    // correctly; that call behaves differently based on whether the spelling panel is displaying a misspelling
+    // or a grammar error.
+    client()->updateSpellingUIWithMisspelledWord(selectedString);
+    
+    return true;
+}
+
+#ifndef BUILDING_ON_TIGER
+static bool isRangeUngrammatical(EditorClient* client, Range *range, Vector<String>& guessesVector)
+{
+    if (!client)
+        return false;
+
+    ExceptionCode ec;
+    if (!range || range->collapsed(ec))
+        return false;
+    
+    // Returns true only if the passed range exactly corresponds to a bad grammar detail range. This is analogous
+    // to isSelectionMisspelled. It's not good enough for there to be some bad grammar somewhere in the range,
+    // or overlapping the range; the ranges must exactly match.
+    guessesVector.clear();
+    int grammarPhraseOffset;
+    
+    GrammarDetail grammarDetail;
+    String badGrammarPhrase = findFirstBadGrammarInRange(client, range, grammarDetail, grammarPhraseOffset, false);    
+    
+    // No bad grammar in these parts at all.
+    if (badGrammarPhrase.isEmpty())
+        return false;
+    
+    // Bad grammar, but phrase (e.g. sentence) starts beyond start of range.
+    if (grammarPhraseOffset > 0)
+        return false;
+    
+    ASSERT(grammarDetail.location >= 0 && grammarDetail.length > 0);
+    
+    // Bad grammar, but start of detail (e.g. ungrammatical word) doesn't match start of range
+    if (grammarDetail.location + grammarPhraseOffset != 0)
+        return false;
+    
+    // Bad grammar at start of range, but end of bad grammar is before or after end of range
+    if (grammarDetail.length != TextIterator::rangeLength(range))
+        return false;
+    
+    // Update the spelling panel to be displaying this error (whether or not the spelling panel is on screen).
+    // This is necessary to make a subsequent call to [NSSpellChecker ignoreWord:inSpellDocumentWithTag:] work
+    // correctly; that call behaves differently based on whether the spelling panel is displaying a misspelling
+    // or a grammar error.
+    client->updateSpellingUIWithGrammarString(badGrammarPhrase, grammarDetail);
+    
+    return true;
+}
+#endif
+
+bool Editor::isSelectionUngrammatical()
+{
+#ifdef BUILDING_ON_TIGER
+    return false;
+#else
+    Vector<String> ignoredGuesses;
+    return isRangeUngrammatical(client(), frame()->selection()->toRange().get(), ignoredGuesses);
+#endif
+}
+
+Vector<String> Editor::guessesForUngrammaticalSelection()
+{
+#ifdef BUILDING_ON_TIGER
+    return Vector<String>();
+#else
+    Vector<String> guesses;
+    // Ignore the result of isRangeUngrammatical; we just want the guesses, whether or not there are any
+    isRangeUngrammatical(client(), frame()->selection()->toRange().get(), guesses);
+    return guesses;
+#endif
+}
+
+Vector<String> Editor::guessesForMisspelledSelection()
+{
+    String selectedString = frame()->selectedText();
+    ASSERT(selectedString.length() != 0);
+
+    Vector<String> guesses;
+    if (client())
+        client()->getGuessesForWord(selectedString, guesses);
+    return guesses;
+}
+
+void Editor::showSpellingGuessPanel()
+{
+    if (!client()) {
+        LOG_ERROR("No NSSpellChecker");
+        return;
+    }
+
+#ifndef BUILDING_ON_TIGER
+    // Post-Tiger, this menu item is a show/hide toggle, to match AppKit. Leave Tiger behavior alone
+    // to match rest of OS X.
+    if (client()->spellingUIIsShowing()) {
+        client()->showSpellingUI(false);
+        return;
+    }
+#endif
+    
+    advanceToNextMisspelling(true);
+    client()->showSpellingUI(true);
+}
+
+bool Editor::spellingPanelIsShowing()
+{
+    if (!client())
+        return false;
+    return client()->spellingUIIsShowing();
+}
+
+void Editor::markMisspellingsAfterTypingToPosition(const VisiblePosition &p)
+{
+    if (!isContinuousSpellCheckingEnabled())
+        return;
+    
+    // Check spelling of one word
+    markMisspellings(Selection(startOfWord(p, LeftWordIfOnBoundary), endOfWord(p, RightWordIfOnBoundary)));
+    
+    if (!isGrammarCheckingEnabled())
+        return;
+    
+    // Check grammar of entire sentence
+    markBadGrammar(Selection(startOfSentence(p), endOfSentence(p)));
+}
+
+static void markAllMisspellingsInRange(EditorClient* client, Range* searchRange)
+{
+    // Use the "markAll" feature of findFirstMisspellingInRange. Ignore the return value and the "out parameter";
+    // all we need to do is mark every instance.
+    int ignoredOffset;
+    findFirstMisspellingInRange(client, searchRange, ignoredOffset, true);
+}
+
+#ifndef BUILDING_ON_TIGER
+static void markAllBadGrammarInRange(EditorClient* client, Range* searchRange)
+{
+    // Use the "markAll" feature of findFirstBadGrammarInRange. Ignore the return value and "out parameters"; all we need to
+    // do is mark every instance.
+    GrammarDetail ignoredGrammarDetail;
+    int ignoredOffset;
+    findFirstBadGrammarInRange(client, searchRange, ignoredGrammarDetail, ignoredOffset, true);
+}
+#endif
+    
+static void markMisspellingsOrBadGrammar(Editor* editor, const Selection& selection, bool checkSpelling)
+{
+    // This function is called with a selection already expanded to word boundaries.
+    // Might be nice to assert that here.
+    
+    // This function is used only for as-you-type checking, so if that's off we do nothing. Note that
+    // grammar checking can only be on if spell checking is also on.
+    if (!editor->isContinuousSpellCheckingEnabled())
+        return;
+    
+    RefPtr<Range> searchRange(selection.toRange());
+    if (!searchRange)
+        return;
+    
+    // If we're not in an editable node, bail.
+    Node* editableNode = searchRange->startContainer();
+    if (!editableNode || !editableNode->isContentEditable())
+        return;
+    
+    // Get the spell checker if it is available
+    if (!editor->client())
+        return;
+    
+    if (checkSpelling)
+        markAllMisspellingsInRange(editor->client(), searchRange.get());
+    else {
+#ifdef BUILDING_ON_TIGER
+        ASSERT_NOT_REACHED();
+#else
+        if (editor->isGrammarCheckingEnabled())
+            markAllBadGrammarInRange(editor->client(), searchRange.get());
+#endif
+    }    
+}
+
+void Editor::markMisspellings(const Selection& selection)
+{
+    markMisspellingsOrBadGrammar(this, selection, true);
+}
+    
+void Editor::markBadGrammar(const Selection& selection)
+{
+#ifndef BUILDING_ON_TIGER
+    markMisspellingsOrBadGrammar(this, selection, false);
+#endif
+}
+
+PassRefPtr<Range> Editor::rangeForPoint(const IntPoint& windowPoint)
+{
+    Document* document = m_frame->documentAtPoint(windowPoint);
+    if (!document)
+        return 0;
+    
+    Frame* frame = document->frame();
+    ASSERT(frame);
+    FrameView* frameView = frame->view();
+    if (!frameView)
+        return 0;
+    IntPoint framePoint = frameView->windowToContents(windowPoint);
+    Selection selection(frame->visiblePositionForPoint(framePoint));
+    return avoidIntersectionWithNode(selection.toRange().get(), deleteButtonController() ? deleteButtonController()->containerElement() : 0);
+}
+
+void Editor::revealSelectionAfterEditingOperation()
+{
+    if (m_ignoreCompositionSelectionChange)
+        return;
+
+    m_frame->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
+}
+
+void Editor::setIgnoreCompositionSelectionChange(bool ignore)
+{
+    if (m_ignoreCompositionSelectionChange == ignore)
+        return;
+
+    m_ignoreCompositionSelectionChange = ignore;
+    if (!ignore)
+        revealSelectionAfterEditingOperation();
+}
+
+PassRefPtr<Range> Editor::compositionRange() const
+{
+    if (!m_compositionNode)
+        return 0;
+    unsigned length = m_compositionNode->length();
+    unsigned start = min(m_compositionStart, length);
+    unsigned end = min(max(start, m_compositionEnd), length);
+    if (start >= end)
+        return 0;
+    return Range::create(m_compositionNode->document(), m_compositionNode.get(), start, m_compositionNode.get(), end);
+}
+
+bool Editor::getCompositionSelection(unsigned& selectionStart, unsigned& selectionEnd) const
+{
+    if (!m_compositionNode)
+        return false;
+    Position start = m_frame->selection()->start();
+    if (start.node() != m_compositionNode)
+        return false;
+    Position end = m_frame->selection()->end();
+    if (end.node() != m_compositionNode)
+        return false;
+
+    if (static_cast<unsigned>(start.offset()) < m_compositionStart)
+        return false;
+    if (static_cast<unsigned>(end.offset()) > m_compositionEnd)
+        return false;
+
+    selectionStart = start.offset() - m_compositionStart;
+    selectionEnd = start.offset() - m_compositionEnd;
+    return true;
+}
+
+void Editor::transpose()
+{
+    if (!canEdit())
+        return;
+
+     Selection selection = m_frame->selection()->selection();
+     if (!selection.isCaret())
+         return;
+
+    // Make a selection that goes back one character and forward two characters.
+    VisiblePosition caret = selection.visibleStart();
+    VisiblePosition next = isEndOfParagraph(caret) ? caret : caret.next();
+    VisiblePosition previous = next.previous();
+    if (next == previous)
+        return;
+    previous = previous.previous();
+    if (!inSameParagraph(next, previous))
+        return;
+    RefPtr<Range> range = makeRange(previous, next);
+    if (!range)
+        return;
+    Selection newSelection(range.get(), DOWNSTREAM);
+
+    // Transpose the two characters.
+    String text = plainText(range.get());
+    if (text.length() != 2)
+        return;
+    String transposed = text.right(1) + text.left(1);
+
+    // Select the two characters.
+    if (newSelection != m_frame->selection()->selection()) {
+        if (!m_frame->shouldChangeSelection(newSelection))
+            return;
+        m_frame->selection()->setSelection(newSelection);
+    }
+
+    // Insert the transposed characters.
+    if (!shouldInsertText(transposed, range.get(), EditorInsertActionTyped))
+        return;
+    replaceSelectionWithText(transposed, false, false);
+}
+
+void Editor::addToKillRing(Range* range, bool prepend)
+{
+    if (m_shouldStartNewKillRingSequence)
+        startNewKillRingSequence();
+
+    String text = plainText(range);
+    text.replace('\\', m_frame->backslashAsCurrencySymbol());
+    if (prepend)
+        prependToKillRing(text);
+    else
+        appendToKillRing(text);
+    m_shouldStartNewKillRingSequence = false;
+}
+
+#if !PLATFORM(MAC)
+
+void Editor::appendToKillRing(const String&)
+{
+}
+
+void Editor::prependToKillRing(const String&)
+{
+}
+
+String Editor::yankFromKillRing()
+{
+    return String();
+}
+
+void Editor::startNewKillRingSequence()
+{
+}
+
+void Editor::setKillRingToYankedState()
+{
+}
+
+#endif
+
+bool Editor::insideVisibleArea(const IntPoint& point) const
+{
+    if (m_frame->excludeFromTextSearch())
+        return false;
+    
+    // Right now, we only check the visibility of a point for disconnected frames. For all other
+    // frames, we assume visibility.
+    Frame* frame = m_frame->isDisconnected() ? m_frame : m_frame->tree()->top(true);
+    if (!frame->isDisconnected())
+        return true;
+    
+    RenderPart* renderer = frame->ownerRenderer();
+    RenderBlock* container = renderer->containingBlock();
+    if (!(container->style()->overflowX() == OHIDDEN || container->style()->overflowY() == OHIDDEN))
+        return true;
+
+    IntRect rectInPageCoords = container->getOverflowClipRect(0, 0);
+    IntRect rectInFrameCoords = IntRect(renderer->xPos() * -1, renderer->yPos() * -1,
+                                    rectInPageCoords.width(), rectInPageCoords.height());
+
+    return rectInFrameCoords.contains(point);
+}
+
+bool Editor::insideVisibleArea(Range* range) const
+{
+    if (!range)
+        return true;
+
+    if (m_frame->excludeFromTextSearch())
+        return false;
+    
+    // Right now, we only check the visibility of a range for disconnected frames. For all other
+    // frames, we assume visibility.
+    Frame* frame = m_frame->isDisconnected() ? m_frame : m_frame->tree()->top(true);
+    if (!frame->isDisconnected())
+        return true;
+    
+    RenderPart* renderer = frame->ownerRenderer();
+    RenderBlock* container = renderer->containingBlock();
+    if (!(container->style()->overflowX() == OHIDDEN || container->style()->overflowY() == OHIDDEN))
+        return true;
+
+    IntRect rectInPageCoords = container->getOverflowClipRect(0, 0);
+    IntRect rectInFrameCoords = IntRect(renderer->xPos() * -1, renderer->yPos() * -1,
+                                    rectInPageCoords.width(), rectInPageCoords.height());
+    IntRect resultRect = range->boundingBox();
+    
+    return rectInFrameCoords.contains(resultRect);
+}
+
+PassRefPtr<Range> Editor::firstVisibleRange(const String& target, bool caseFlag)
+{
+    RefPtr<Range> searchRange(rangeOfContents(m_frame->document()));
+    RefPtr<Range> resultRange = findPlainText(searchRange.get(), target, true, caseFlag);
+    ExceptionCode ec = 0;
+
+    while (!insideVisibleArea(resultRange.get())) {
+        searchRange->setStartAfter(resultRange->endContainer(), ec);
+        if (searchRange->startContainer() == searchRange->endContainer())
+            return Range::create(m_frame->document());
+        resultRange = findPlainText(searchRange.get(), target, true, caseFlag);
+    }
+    
+    return resultRange;
+}
+
+PassRefPtr<Range> Editor::lastVisibleRange(const String& target, bool caseFlag)
+{
+    RefPtr<Range> searchRange(rangeOfContents(m_frame->document()));
+    RefPtr<Range> resultRange = findPlainText(searchRange.get(), target, false, caseFlag);
+    ExceptionCode ec = 0;
+
+    while (!insideVisibleArea(resultRange.get())) {
+        searchRange->setEndBefore(resultRange->startContainer(), ec);
+        if (searchRange->startContainer() == searchRange->endContainer())
+            return Range::create(m_frame->document());
+        resultRange = findPlainText(searchRange.get(), target, false, caseFlag);
+    }
+    
+    return resultRange;
+}
+
+PassRefPtr<Range> Editor::nextVisibleRange(Range* currentRange, const String& target, bool forward, bool caseFlag, bool wrapFlag)
+{
+    if (m_frame->excludeFromTextSearch())
+        return Range::create(m_frame->document());
+
+    RefPtr<Range> resultRange = currentRange;
+    RefPtr<Range> searchRange(rangeOfContents(m_frame->document()));
+    ExceptionCode ec = 0;
+    
+    for ( ; !insideVisibleArea(resultRange.get()); resultRange = findPlainText(searchRange.get(), target, forward, caseFlag)) {
+        if (resultRange->collapsed(ec)) {
+            if (!resultRange->startContainer()->isInShadowTree())
+                break;
+            searchRange = rangeOfContents(m_frame->document());
+            if (forward)
+                searchRange->setStartAfter(resultRange->startContainer()->shadowAncestorNode(), ec);
+            else
+                searchRange->setEndBefore(resultRange->startContainer()->shadowAncestorNode(), ec);
+            continue;
+        }
+
+        if (forward)
+            searchRange->setStartAfter(resultRange->endContainer(), ec);
+        else
+            searchRange->setEndBefore(resultRange->startContainer(), ec);
+
+        Node* shadowTreeRoot = searchRange->shadowTreeRootNode();
+        if (searchRange->collapsed(ec) && shadowTreeRoot) {
+            if (forward)
+                searchRange->setEnd(shadowTreeRoot, shadowTreeRoot->childNodeCount(), ec);
+            else
+                searchRange->setStartBefore(shadowTreeRoot, ec);
+        }
+        
+        if (searchRange->startContainer()->isDocumentNode() && searchRange->endContainer()->isDocumentNode())
+            break;
+    }
+    
+    if (insideVisibleArea(resultRange.get()))
+        return resultRange;
+    
+    if (!wrapFlag)
+        return Range::create(m_frame->document());
+
+    if (forward)
+        return firstVisibleRange(target, caseFlag);
+
+    return lastVisibleRange(target, caseFlag);
+}
+
+} // namespace WebCore