Source/web/WebFrameImpl.cpp

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
frameContentAsPlainText
pluginContainerFromFrame
pluginContainerFromNode
m_printedPageWidth
begin
end
getPageShrink
spoolPage
spoolAllPagesWithBoundaries
computePageRects
pageCount
m_printParams
begin
end
getPageShrink
computePageRects
pageCount
spoolPage
DataSourceForDocLoader
instanceCount
frameForCurrentContext
frameForContext
fromFrameOwnerElement
close
uniqueName
assignedName
setName
iconURLs
setIsRemote
setRemoteWebLayer
setPermissionClient
setSharedWorkerRepositoryClient
scrollOffset
minimumScrollOffset
maximumScrollOffset
setScrollOffset
contentsSize
hasVisibleContent
visibleContentRect
hasHorizontalScrollbar
hasVerticalScrollbar
view
opener
setOpener
appendChild
removeChild
parent
top
previousSibling
nextSibling
firstChild
lastChild
traversePrevious
traverseNext
findChildByName
document
performance
dispatchBeforeUnloadEvent
dispatchUnloadEvent
windowObject
bindToWindowObject
bindToWindowObject
executeScript
executeScriptInIsolatedWorld
setIsolatedWorldSecurityOrigin
setIsolatedWorldContentSecurityPolicy
addMessageToConsole
collectGarbage
checkIfRunInsecureContent
executeScriptAndReturnValue
executeScriptInIsolatedWorld
callFunctionEvenIfScriptDisabled
mainWorldScriptContext
reload
reloadWithOverrideURL
loadRequest
loadHistoryItem
loadData
loadHTMLString
isLoading
stopLoading
provisionalDataSource
dataSource
previousHistoryItem
currentHistoryItem
enableViewSourceMode
isViewSourceModeEnabled
setReferrerForRequest
dispatchWillSendRequest
createAssociatedURLLoader
unloadListenerCount
replaceSelection
insertText
setMarkedText
unmarkText
hasMarkedText
markedRange
firstRectForCharacterRange
characterIndexForPoint
executeCommand
executeCommand
isCommandEnabled
enableContinuousSpellChecking
isContinuousSpellCheckingEnabled
requestTextChecking
replaceMisspelledRange
removeSpellingMarkers
hasSelection
selectionRange
selectionAsText
selectionAsMarkup
selectWordAroundPosition
selectWordAroundCaret
selectRange
selectRange
moveRangeSelection
moveCaretSelection
setEditableSelectionOffsets
setCompositionFromExistingText
extendSelectionAndDelete
setCaretVisible
visiblePositionForWindowPoint
focusedPluginIfInputMethodSupported
printBegin
getPrintPageShrink
printPage
printEnd
isPrintScalingDisabledForPlugin
hasCustomPageSizeStyle
isPageBoxVisible
pageSizeAndMarginsInPixels
pageProperty
find
stopFinding
scopeStringMatches
cancelPendingScopingEffort
increaseMatchCount
resetMatchCount
sendOrientationChangeEvent
dispatchMessageEventWithOriginCheck
findMatchMarkersVersion
selectNearestFindMatch
activeFindMatchRect
findMatchRects
setTickmarks
contentAsText
contentAsMarkup
renderTreeAsText
markerTextForListItem
printPagesWithBoundaries
selectionBoundsRect
selectionStartHasSpellingMarkerFor
layerTreeAsText
create
create
m_inputEventsScaleFactorForEmulation
setWebCoreFrame
initializeAsMainFrame
createChildFrame
didChangeContentsSize
createFrameView
fromFrame
fromFrameOwnerElement
viewImpl
dataSourceImpl
provisionalDataSourceImpl
setFindEndstateFocusAndSelection
didFail
setCanHaveScrollbars
setInputEventsTransformForEmulation
loadJavaScriptURL
willDetachParent
activeMatchFrame
activeMatch
ensureTextFinder
invalidateScrollbar
invalidateAll
/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// How ownership works
// -------------------
//
// Big oh represents a refcounted relationship: owner O--- ownee
//
// WebView (for the toplevel frame only)
//    O
//    |           WebFrame
//    |              O
//    |              |
//   Page O------- LocalFrame (m_mainFrame) O-------O FrameView
//                   ||
//                   ||
//               FrameLoader
//
// FrameLoader and LocalFrame are formerly one object that was split apart because
// it got too big. They basically have the same lifetime, hence the double line.
//
// From the perspective of the embedder, WebFrame is simply an object that it
// allocates by calling WebFrame::create() and must be freed by calling close().
// Internally, WebFrame is actually refcounted and it holds a reference to its
// corresponding LocalFrame in WebCore.
//
// How frames are destroyed
// ------------------------
//
// The main frame is never destroyed and is re-used. The FrameLoader is re-used
// and a reference to the main frame is kept by the Page.
//
// When frame content is replaced, all subframes are destroyed. This happens
// in FrameLoader::detachFromParent for each subframe in a pre-order depth-first
// traversal. Note that child node order may not match DOM node order!
// detachFromParent() calls FrameLoaderClient::detachedFromParent(), which calls
// WebFrame::frameDetached(). This triggers WebFrame to clear its reference to
// LocalFrame, and also notifies the embedder via WebFrameClient that the frame is
// detached. Most embedders will invoke close() on the WebFrame at this point,
// triggering its deletion unless something else is still retaining a reference.
//
// Thie client is expected to be set whenever the WebFrameImpl is attached to
// the DOM.

#include "config.h"
#include "WebFrameImpl.h"

#include <algorithm>
#include "AssociatedURLLoader.h"
#include "CompositionUnderlineVectorBuilder.h"
#include "EventListenerWrapper.h"
#include "FindInPageCoordinates.h"
#include "HTMLNames.h"
#include "PageOverlay.h"
#include "SharedWorkerRepositoryClientImpl.h"
#include "TextFinder.h"
#include "WebConsoleMessage.h"
#include "WebDOMEvent.h"
#include "WebDOMEventListener.h"
#include "WebDataSourceImpl.h"
#include "WebDevToolsAgentPrivate.h"
#include "WebDocument.h"
#include "WebFindOptions.h"
#include "WebFormElement.h"
#include "WebFrameClient.h"
#include "WebHistoryItem.h"
#include "WebIconURL.h"
#include "WebInputElement.h"
#include "WebNode.h"
#include "WebPerformance.h"
#include "WebPlugin.h"
#include "WebPluginContainerImpl.h"
#include "WebPrintParams.h"
#include "WebRange.h"
#include "WebScriptSource.h"
#include "WebSecurityOrigin.h"
#include "WebSerializedScriptValue.h"
#include "WebViewImpl.h"
#include "bindings/v8/DOMWrapperWorld.h"
#include "bindings/v8/ExceptionState.h"
#include "bindings/v8/ExceptionStatePlaceholder.h"
#include "bindings/v8/ScriptController.h"
#include "bindings/v8/ScriptSourceCode.h"
#include "bindings/v8/ScriptValue.h"
#include "bindings/v8/V8GCController.h"
#include "bindings/v8/V8PerIsolateData.h"
#include "core/dom/Document.h"
#include "core/dom/DocumentMarker.h"
#include "core/dom/DocumentMarkerController.h"
#include "core/dom/IconURL.h"
#include "core/dom/MessagePort.h"
#include "core/dom/Node.h"
#include "core/dom/NodeTraversal.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/editing/Editor.h"
#include "core/editing/FrameSelection.h"
#include "core/editing/InputMethodController.h"
#include "core/editing/PlainTextRange.h"
#include "core/editing/SpellChecker.h"
#include "core/editing/TextAffinity.h"
#include "core/editing/TextIterator.h"
#include "core/editing/htmlediting.h"
#include "core/editing/markup.h"
#include "core/frame/Console.h"
#include "core/frame/DOMWindow.h"
#include "core/frame/FrameView.h"
#include "core/html/HTMLCollection.h"
#include "core/html/HTMLFormElement.h"
#include "core/html/HTMLFrameElementBase.h"
#include "core/html/HTMLFrameOwnerElement.h"
#include "core/html/HTMLHeadElement.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/HTMLLinkElement.h"
#include "core/html/PluginDocument.h"
#include "core/inspector/InspectorController.h"
#include "core/inspector/ScriptCallStack.h"
#include "core/loader/DocumentLoader.h"
#include "core/loader/FrameLoadRequest.h"
#include "core/loader/FrameLoader.h"
#include "core/loader/HistoryItem.h"
#include "core/loader/SubstituteData.h"
#include "core/page/Chrome.h"
#include "core/page/EventHandler.h"
#include "core/page/FocusController.h"
#include "core/page/FrameTree.h"
#include "core/page/Page.h"
#include "core/page/PrintContext.h"
#include "core/frame/Settings.h"
#include "core/rendering/HitTestResult.h"
#include "core/rendering/RenderBox.h"
#include "core/rendering/RenderFrame.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderObject.h"
#include "core/rendering/RenderTreeAsText.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/style/StyleInheritedData.h"
#include "core/timing/Performance.h"
#include "platform/TraceEvent.h"
#include "platform/UserGestureIndicator.h"
#include "platform/clipboard/ClipboardUtilities.h"
#include "platform/fonts/FontCache.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/GraphicsLayerClient.h"
#include "platform/graphics/skia/SkiaUtils.h"
#include "platform/heap/Handle.h"
#include "platform/network/ResourceRequest.h"
#include "platform/scroll/ScrollbarTheme.h"
#include "platform/scroll/ScrollTypes.h"
#include "platform/weborigin/KURL.h"
#include "platform/weborigin/SchemeRegistry.h"
#include "platform/weborigin/SecurityPolicy.h"
#include "public/platform/Platform.h"
#include "public/platform/WebFloatPoint.h"
#include "public/platform/WebFloatRect.h"
#include "public/platform/WebLayer.h"
#include "public/platform/WebPoint.h"
#include "public/platform/WebRect.h"
#include "public/platform/WebSize.h"
#include "public/platform/WebURLError.h"
#include "public/platform/WebVector.h"
#include "wtf/CurrentTime.h"
#include "wtf/HashMap.h"

using namespace WebCore;

namespace blink {

static int frameCount = 0;

// Key for a StatsCounter tracking how many WebFrames are active.
static const char webFrameActiveCount[] = "WebFrameActiveCount";

static void frameContentAsPlainText(size_t maxChars, LocalFrame* frame, StringBuilder& output)
{
    Document* document = frame->document();
    if (!document)
        return;

    if (!frame->view())
        return;

    // TextIterator iterates over the visual representation of the DOM. As such,
    // it requires you to do a layout before using it (otherwise it'll crash).
    document->updateLayout();

    // Select the document body.
    RefPtrWillBeRawPtr<Range> range(document->createRange());
    TrackExceptionState exceptionState;
    range->selectNodeContents(document->body(), exceptionState);

    if (!exceptionState.hadException()) {
        // The text iterator will walk nodes giving us text. This is similar to
        // the plainText() function in core/editing/TextIterator.h, but we implement the maximum
        // size and also copy the results directly into a wstring, avoiding the
        // string conversion.
        for (TextIterator it(range.get()); !it.atEnd(); it.advance()) {
            it.appendTextToStringBuilder(output, 0, maxChars - output.length());
            if (output.length() >= maxChars)
                return; // Filled up the buffer.
        }
    }

    // The separator between frames when the frames are converted to plain text.
    const LChar frameSeparator[] = { '\n', '\n' };
    const size_t frameSeparatorLength = WTF_ARRAY_LENGTH(frameSeparator);

    // Recursively walk the children.
    const FrameTree& frameTree = frame->tree();
    for (LocalFrame* curChild = frameTree.firstChild(); curChild; curChild = curChild->tree().nextSibling()) {
        // Ignore the text of non-visible frames.
        RenderView* contentRenderer = curChild->contentRenderer();
        RenderPart* ownerRenderer = curChild->ownerRenderer();
        if (!contentRenderer || !contentRenderer->width() || !contentRenderer->height()
            || (contentRenderer->x() + contentRenderer->width() <= 0) || (contentRenderer->y() + contentRenderer->height() <= 0)
            || (ownerRenderer && ownerRenderer->style() && ownerRenderer->style()->visibility() != VISIBLE)) {
            continue;
        }

        // Make sure the frame separator won't fill up the buffer, and give up if
        // it will. The danger is if the separator will make the buffer longer than
        // maxChars. This will cause the computation above:
        //   maxChars - output->size()
        // to be a negative number which will crash when the subframe is added.
        if (output.length() >= maxChars - frameSeparatorLength)
            return;

        output.append(frameSeparator, frameSeparatorLength);
        frameContentAsPlainText(maxChars, curChild, output);
        if (output.length() >= maxChars)
            return; // Filled up the buffer.
    }
}

WebPluginContainerImpl* WebFrameImpl::pluginContainerFromFrame(LocalFrame* frame)
{
    if (!frame)
        return 0;
    if (!frame->document() || !frame->document()->isPluginDocument())
        return 0;
    PluginDocument* pluginDocument = toPluginDocument(frame->document());
    return toWebPluginContainerImpl(pluginDocument->pluginWidget());
}

WebPluginContainerImpl* WebFrameImpl::pluginContainerFromNode(WebCore::LocalFrame* frame, const WebNode& node)
{
    WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame);
    if (pluginContainer)
        return pluginContainer;
    return toWebPluginContainerImpl(node.pluginContainer());
}

// Simple class to override some of PrintContext behavior. Some of the methods
// made virtual so that they can be overridden by ChromePluginPrintContext.
class ChromePrintContext : public PrintContext {
    WTF_MAKE_NONCOPYABLE(ChromePrintContext);
public:
    ChromePrintContext(LocalFrame* frame)
        : PrintContext(frame)
        , m_printedPageWidth(0)
    {
    }

    virtual ~ChromePrintContext() { }

    virtual void begin(float width, float height)
    {
        ASSERT(!m_printedPageWidth);
        m_printedPageWidth = width;
        PrintContext::begin(m_printedPageWidth, height);
    }

    virtual void end()
    {
        PrintContext::end();
    }

    virtual float getPageShrink(int pageNumber) const
    {
        IntRect pageRect = m_pageRects[pageNumber];
        return m_printedPageWidth / pageRect.width();
    }

    // Spools the printed page, a subrect of frame(). Skip the scale step.
    // NativeTheme doesn't play well with scaling. Scaling is done browser side
    // instead. Returns the scale to be applied.
    // On Linux, we don't have the problem with NativeTheme, hence we let WebKit
    // do the scaling and ignore the return value.
    virtual float spoolPage(GraphicsContext& context, int pageNumber)
    {
        IntRect pageRect = m_pageRects[pageNumber];
        float scale = m_printedPageWidth / pageRect.width();

        context.save();
#if OS(POSIX) && !OS(MACOSX)
        context.scale(WebCore::FloatSize(scale, scale));
#endif
        context.translate(static_cast<float>(-pageRect.x()), static_cast<float>(-pageRect.y()));
        context.clip(pageRect);
        frame()->view()->paintContents(&context, pageRect);
        if (context.supportsURLFragments())
            outputLinkedDestinations(context, frame()->document(), pageRect);
        context.restore();
        return scale;
    }

    void spoolAllPagesWithBoundaries(GraphicsContext& graphicsContext, const FloatSize& pageSizeInPixels)
    {
        if (!frame()->document() || !frame()->view() || !frame()->document()->renderer())
            return;

        frame()->document()->updateLayout();

        float pageHeight;
        computePageRects(FloatRect(FloatPoint(0, 0), pageSizeInPixels), 0, 0, 1, pageHeight);

        const float pageWidth = pageSizeInPixels.width();
        size_t numPages = pageRects().size();
        int totalHeight = numPages * (pageSizeInPixels.height() + 1) - 1;

        // Fill the whole background by white.
        graphicsContext.setFillColor(Color::white);
        graphicsContext.fillRect(FloatRect(0, 0, pageWidth, totalHeight));

        int currentHeight = 0;
        for (size_t pageIndex = 0; pageIndex < numPages; pageIndex++) {
            // Draw a line for a page boundary if this isn't the first page.
            if (pageIndex > 0) {
                graphicsContext.save();
                graphicsContext.setStrokeColor(Color(0, 0, 255));
                graphicsContext.setFillColor(Color(0, 0, 255));
                graphicsContext.drawLine(IntPoint(0, currentHeight), IntPoint(pageWidth, currentHeight));
                graphicsContext.restore();
            }

            graphicsContext.save();

            graphicsContext.translate(0, currentHeight);
#if OS(WIN) || OS(MACOSX)
            // Account for the disabling of scaling in spoolPage. In the context
            // of spoolAllPagesWithBoundaries the scale HAS NOT been pre-applied.
            float scale = getPageShrink(pageIndex);
            graphicsContext.scale(WebCore::FloatSize(scale, scale));
#endif
            spoolPage(graphicsContext, pageIndex);
            graphicsContext.restore();

            currentHeight += pageSizeInPixels.height() + 1;
        }
    }

    virtual void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight)
    {
        PrintContext::computePageRects(printRect, headerHeight, footerHeight, userScaleFactor, outPageHeight);
    }

    virtual int pageCount() const
    {
        return PrintContext::pageCount();
    }

private:
    // Set when printing.
    float m_printedPageWidth;
};

// Simple class to override some of PrintContext behavior. This is used when
// the frame hosts a plugin that supports custom printing. In this case, we
// want to delegate all printing related calls to the plugin.
class ChromePluginPrintContext : public ChromePrintContext {
public:
    ChromePluginPrintContext(LocalFrame* frame, WebPluginContainerImpl* plugin, const WebPrintParams& printParams)
        : ChromePrintContext(frame), m_plugin(plugin), m_pageCount(0), m_printParams(printParams)
    {
    }

    virtual ~ChromePluginPrintContext() { }

    virtual void begin(float width, float height)
    {
    }

    virtual void end()
    {
        m_plugin->printEnd();
    }

    virtual float getPageShrink(int pageNumber) const
    {
        // We don't shrink the page (maybe we should ask the widget ??)
        return 1.0;
    }

    virtual void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight)
    {
        m_printParams.printContentArea = IntRect(printRect);
        m_pageCount = m_plugin->printBegin(m_printParams);
    }

    virtual int pageCount() const
    {
        return m_pageCount;
    }

    // Spools the printed page, a subrect of frame(). Skip the scale step.
    // NativeTheme doesn't play well with scaling. Scaling is done browser side
    // instead. Returns the scale to be applied.
    virtual float spoolPage(GraphicsContext& context, int pageNumber)
    {
        m_plugin->printPage(pageNumber, &context);
        return 1.0;
    }

private:
    // Set when printing.
    WebPluginContainerImpl* m_plugin;
    int m_pageCount;
    WebPrintParams m_printParams;

};

static WebDataSource* DataSourceForDocLoader(DocumentLoader* loader)
{
    return loader ? WebDataSourceImpl::fromDocumentLoader(loader) : 0;
}

// WebFrame -------------------------------------------------------------------

int WebFrame::instanceCount()
{
    return frameCount;
}

WebLocalFrame* WebFrame::frameForCurrentContext()
{
    v8::Handle<v8::Context> context = v8::Isolate::GetCurrent()->GetCurrentContext();
    if (context.IsEmpty())
        return 0;
    return frameForContext(context);
}

WebLocalFrame* WebFrame::frameForContext(v8::Handle<v8::Context> context)
{
   return WebFrameImpl::fromFrame(toFrameIfNotDetached(context));
}

WebLocalFrame* WebFrame::fromFrameOwnerElement(const WebElement& element)
{
    return WebFrameImpl::fromFrameOwnerElement(PassRefPtr<Element>(element).get());
}

void WebFrameImpl::close()
{
    m_client = 0;
    deref(); // Balances ref() acquired in WebFrame::create
}

WebString WebFrameImpl::uniqueName() const
{
    return frame()->tree().uniqueName();
}

WebString WebFrameImpl::assignedName() const
{
    return frame()->tree().name();
}

void WebFrameImpl::setName(const WebString& name)
{
    frame()->tree().setName(name);
}

WebVector<WebIconURL> WebFrameImpl::iconURLs(int iconTypesMask) const
{
    // The URL to the icon may be in the header. As such, only
    // ask the loader for the icon if it's finished loading.
    if (frame()->loader().state() == FrameStateComplete)
        return frame()->document()->iconURLs(iconTypesMask);
    return WebVector<WebIconURL>();
}

void WebFrameImpl::setIsRemote(bool isRemote)
{
    m_isRemote = isRemote;
    if (isRemote)
        client()->initializeChildFrame(frame()->view()->frameRect(), frame()->view()->visibleContentScaleFactor());
}

void WebFrameImpl::setRemoteWebLayer(WebLayer* webLayer)
{
    if (!frame())
        return;

    if (frame()->remotePlatformLayer())
        GraphicsLayer::unregisterContentsLayer(frame()->remotePlatformLayer());
    if (webLayer)
        GraphicsLayer::registerContentsLayer(webLayer);
    frame()->setRemotePlatformLayer(webLayer);
    frame()->ownerElement()->scheduleLayerUpdate();
}

void WebFrameImpl::setPermissionClient(WebPermissionClient* permissionClient)
{
    m_permissionClient = permissionClient;
}

void WebFrameImpl::setSharedWorkerRepositoryClient(WebSharedWorkerRepositoryClient* client)
{
    m_sharedWorkerRepositoryClient = SharedWorkerRepositoryClientImpl::create(client);
}

WebSize WebFrameImpl::scrollOffset() const
{
    FrameView* view = frameView();
    if (!view)
        return WebSize();
    return view->scrollOffset();
}

WebSize WebFrameImpl::minimumScrollOffset() const
{
    FrameView* view = frameView();
    if (!view)
        return WebSize();
    return toIntSize(view->minimumScrollPosition());
}

WebSize WebFrameImpl::maximumScrollOffset() const
{
    FrameView* view = frameView();
    if (!view)
        return WebSize();
    return toIntSize(view->maximumScrollPosition());
}

void WebFrameImpl::setScrollOffset(const WebSize& offset)
{
    if (FrameView* view = frameView())
        view->setScrollOffset(IntPoint(offset.width, offset.height));
}

WebSize WebFrameImpl::contentsSize() const
{
    return frame()->view()->contentsSize();
}

bool WebFrameImpl::hasVisibleContent() const
{
    return frame()->view()->visibleWidth() > 0 && frame()->view()->visibleHeight() > 0;
}

WebRect WebFrameImpl::visibleContentRect() const
{
    return frame()->view()->visibleContentRect();
}

bool WebFrameImpl::hasHorizontalScrollbar() const
{
    return frame() && frame()->view() && frame()->view()->horizontalScrollbar();
}

bool WebFrameImpl::hasVerticalScrollbar() const
{
    return frame() && frame()->view() && frame()->view()->verticalScrollbar();
}

WebView* WebFrameImpl::view() const
{
    return viewImpl();
}

WebFrame* WebFrameImpl::opener() const
{
    return m_opener;
}

void WebFrameImpl::setOpener(WebFrame* opener)
{
    WebFrameImpl* openerImpl = toWebFrameImpl(opener);
    if (m_opener && !openerImpl && m_client)
        m_client->didDisownOpener(this);

    if (m_opener)
        m_opener->m_openedFrames.remove(this);
    if (openerImpl)
        openerImpl->m_openedFrames.add(this);
    m_opener = openerImpl;

    ASSERT(m_frame);
    if (m_frame && m_frame->document())
        m_frame->document()->initSecurityContext();
}

void WebFrameImpl::appendChild(WebFrame* child)
{
    // FIXME: Original code asserts that the frames have the same Page. We
    // should add an equivalent check... figure out what.
    WebFrameImpl* childImpl = toWebFrameImpl(child);
    childImpl->m_parent = this;
    WebFrameImpl* oldLast = m_lastChild;
    m_lastChild = childImpl;

    if (oldLast) {
        childImpl->m_previousSibling = oldLast;
        oldLast->m_nextSibling = childImpl;
    } else {
        m_firstChild = childImpl;
    }
    // FIXME: Not sure if this is a legitimate assert.
    ASSERT(frame());
    frame()->tree().invalidateScopedChildCount();
}

void WebFrameImpl::removeChild(WebFrame* child)
{
    WebFrameImpl* childImpl = toWebFrameImpl(child);
    childImpl->m_parent = 0;

    if (m_firstChild == childImpl)
        m_firstChild = childImpl->m_nextSibling;
    else
        childImpl->m_previousSibling->m_nextSibling = childImpl->m_nextSibling;

    if (m_lastChild == childImpl)
        m_lastChild = childImpl->m_previousSibling;
    else
        childImpl->m_nextSibling->m_previousSibling = childImpl->m_previousSibling;

    childImpl->m_previousSibling = childImpl->m_nextSibling = 0;
    // FIXME: Not sure if this is a legitimate assert.
    ASSERT(frame());
    frame()->tree().invalidateScopedChildCount();
}

WebFrame* WebFrameImpl::parent() const
{
    return m_parent;
}

WebFrame* WebFrameImpl::top() const
{
    WebFrameImpl* frame = const_cast<WebFrameImpl*>(this);
    for (WebFrameImpl* parent = frame; parent; parent = parent->m_parent)
        frame = parent;
    return frame;
}

WebFrame* WebFrameImpl::previousSibling() const
{
    return m_previousSibling;
}

WebFrame* WebFrameImpl::nextSibling() const
{
    return m_nextSibling;
}

WebFrame* WebFrameImpl::firstChild() const
{
    return m_firstChild;
}

WebFrame* WebFrameImpl::lastChild() const
{
    return m_lastChild;
}

WebFrame* WebFrameImpl::traversePrevious(bool wrap) const
{
    if (!frame())
        return 0;
    return fromFrame(frame()->tree().traversePreviousWithWrap(wrap));
}

WebFrame* WebFrameImpl::traverseNext(bool wrap) const
{
    if (!frame())
        return 0;
    return fromFrame(frame()->tree().traverseNextWithWrap(wrap));
}

WebFrame* WebFrameImpl::findChildByName(const WebString& name) const
{
    if (!frame())
        return 0;
    return fromFrame(frame()->tree().child(name));
}

WebDocument WebFrameImpl::document() const
{
    if (!frame() || !frame()->document())
        return WebDocument();
    return WebDocument(frame()->document());
}

WebPerformance WebFrameImpl::performance() const
{
    if (!frame())
        return WebPerformance();
    return WebPerformance(&frame()->domWindow()->performance());
}

bool WebFrameImpl::dispatchBeforeUnloadEvent()
{
    if (!frame())
        return true;
    return frame()->loader().shouldClose();
}

void WebFrameImpl::dispatchUnloadEvent()
{
    if (!frame())
        return;
    frame()->loader().closeURL();
}

NPObject* WebFrameImpl::windowObject() const
{
    if (!frame())
        return 0;
    return frame()->script().windowScriptNPObject();
}

void WebFrameImpl::bindToWindowObject(const WebString& name, NPObject* object)
{
    bindToWindowObject(name, object, 0);
}

void WebFrameImpl::bindToWindowObject(const WebString& name, NPObject* object, void*)
{
    if (!frame() || !frame()->script().canExecuteScripts(NotAboutToExecuteScript))
        return;
    frame()->script().bindToWindowObject(frame(), String(name), object);
}

void WebFrameImpl::executeScript(const WebScriptSource& source)
{
    ASSERT(frame());
    TextPosition position(OrdinalNumber::fromOneBasedInt(source.startLine), OrdinalNumber::first());
    frame()->script().executeScriptInMainWorld(ScriptSourceCode(source.code, source.url, position));
}

void WebFrameImpl::executeScriptInIsolatedWorld(int worldID, const WebScriptSource* sourcesIn, unsigned numSources, int extensionGroup)
{
    ASSERT(frame());
    RELEASE_ASSERT(worldID > 0);
    RELEASE_ASSERT(worldID < EmbedderWorldIdLimit);

    Vector<ScriptSourceCode> sources;
    for (unsigned i = 0; i < numSources; ++i) {
        TextPosition position(OrdinalNumber::fromOneBasedInt(sourcesIn[i].startLine), OrdinalNumber::first());
        sources.append(ScriptSourceCode(sourcesIn[i].code, sourcesIn[i].url, position));
    }

    frame()->script().executeScriptInIsolatedWorld(worldID, sources, extensionGroup, 0);
}

void WebFrameImpl::setIsolatedWorldSecurityOrigin(int worldID, const WebSecurityOrigin& securityOrigin)
{
    ASSERT(frame());
    DOMWrapperWorld::setIsolatedWorldSecurityOrigin(worldID, securityOrigin.get());
}

void WebFrameImpl::setIsolatedWorldContentSecurityPolicy(int worldID, const WebString& policy)
{
    ASSERT(frame());
    DOMWrapperWorld::setIsolatedWorldContentSecurityPolicy(worldID, policy);
}

void WebFrameImpl::addMessageToConsole(const WebConsoleMessage& message)
{
    ASSERT(frame());

    MessageLevel webCoreMessageLevel;
    switch (message.level) {
    case WebConsoleMessage::LevelDebug:
        webCoreMessageLevel = DebugMessageLevel;
        break;
    case WebConsoleMessage::LevelLog:
        webCoreMessageLevel = LogMessageLevel;
        break;
    case WebConsoleMessage::LevelWarning:
        webCoreMessageLevel = WarningMessageLevel;
        break;
    case WebConsoleMessage::LevelError:
        webCoreMessageLevel = ErrorMessageLevel;
        break;
    default:
        ASSERT_NOT_REACHED();
        return;
    }

    frame()->document()->addConsoleMessage(OtherMessageSource, webCoreMessageLevel, message.text);
}

void WebFrameImpl::collectGarbage()
{
    if (!frame())
        return;
    if (!frame()->settings()->scriptEnabled())
        return;
    V8GCController::collectGarbage(v8::Isolate::GetCurrent());
}

bool WebFrameImpl::checkIfRunInsecureContent(const WebURL& url) const
{
    ASSERT(frame());
    return frame()->loader().mixedContentChecker()->canRunInsecureContent(frame()->document()->securityOrigin(), url);
}

v8::Handle<v8::Value> WebFrameImpl::executeScriptAndReturnValue(const WebScriptSource& source)
{
    ASSERT(frame());

    // FIXME: This fake user gesture is required to make a bunch of pyauto
    // tests pass. If this isn't needed in non-test situations, we should
    // consider removing this code and changing the tests.
    // http://code.google.com/p/chromium/issues/detail?id=86397
    UserGestureIndicator gestureIndicator(DefinitelyProcessingNewUserGesture);

    TextPosition position(OrdinalNumber::fromOneBasedInt(source.startLine), OrdinalNumber::first());
    return frame()->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(source.code, source.url, position)).v8Value();
}

void WebFrameImpl::executeScriptInIsolatedWorld(int worldID, const WebScriptSource* sourcesIn, unsigned numSources, int extensionGroup, WebVector<v8::Local<v8::Value> >* results)
{
    ASSERT(frame());
    RELEASE_ASSERT(worldID > 0);
    RELEASE_ASSERT(worldID < EmbedderWorldIdLimit);

    Vector<ScriptSourceCode> sources;

    for (unsigned i = 0; i < numSources; ++i) {
        TextPosition position(OrdinalNumber::fromOneBasedInt(sourcesIn[i].startLine), OrdinalNumber::first());
        sources.append(ScriptSourceCode(sourcesIn[i].code, sourcesIn[i].url, position));
    }

    if (results) {
        Vector<ScriptValue> scriptResults;
        frame()->script().executeScriptInIsolatedWorld(worldID, sources, extensionGroup, &scriptResults);
        WebVector<v8::Local<v8::Value> > v8Results(scriptResults.size());
        for (unsigned i = 0; i < scriptResults.size(); i++)
            v8Results[i] = v8::Local<v8::Value>::New(toIsolate(frame()), scriptResults[i].v8Value());
        results->swap(v8Results);
    } else {
        frame()->script().executeScriptInIsolatedWorld(worldID, sources, extensionGroup, 0);
    }
}

v8::Handle<v8::Value> WebFrameImpl::callFunctionEvenIfScriptDisabled(v8::Handle<v8::Function> function, v8::Handle<v8::Value> receiver, int argc, v8::Handle<v8::Value> argv[])
{
    ASSERT(frame());
    return frame()->script().callFunction(function, receiver, argc, argv);
}

v8::Local<v8::Context> WebFrameImpl::mainWorldScriptContext() const
{
    return toV8Context(V8PerIsolateData::mainThreadIsolate(), frame(), DOMWrapperWorld::mainWorld());
}

void WebFrameImpl::reload(bool ignoreCache)
{
    ASSERT(frame());
    frame()->loader().reload(ignoreCache ? EndToEndReload : NormalReload);
}

void WebFrameImpl::reloadWithOverrideURL(const WebURL& overrideUrl, bool ignoreCache)
{
    ASSERT(frame());
    frame()->loader().reload(ignoreCache ? EndToEndReload : NormalReload, overrideUrl);
}

void WebFrameImpl::loadRequest(const WebURLRequest& request)
{
    ASSERT(frame());
    ASSERT(!request.isNull());
    const ResourceRequest& resourceRequest = request.toResourceRequest();

    if (resourceRequest.url().protocolIs("javascript")) {
        loadJavaScriptURL(resourceRequest.url());
        return;
    }

    frame()->loader().load(FrameLoadRequest(0, resourceRequest));
}

void WebFrameImpl::loadHistoryItem(const WebHistoryItem& item, WebURLRequest::CachePolicy cachePolicy)
{
    ASSERT(frame());
    RefPtr<HistoryItem> historyItem = PassRefPtr<HistoryItem>(item);
    ASSERT(historyItem);
    frame()->page()->historyController().goToItem(historyItem.get(), static_cast<ResourceRequestCachePolicy>(cachePolicy));
}

void WebFrameImpl::loadData(const WebData& data, const WebString& mimeType, const WebString& textEncoding, const WebURL& baseURL, const WebURL& unreachableURL, bool replace)
{
    ASSERT(frame());

    // If we are loading substitute data to replace an existing load, then
    // inherit all of the properties of that original request.  This way,
    // reload will re-attempt the original request.  It is essential that
    // we only do this when there is an unreachableURL since a non-empty
    // unreachableURL informs FrameLoader::reload to load unreachableURL
    // instead of the currently loaded URL.
    ResourceRequest request;
    if (replace && !unreachableURL.isEmpty() && frame()->loader().provisionalDocumentLoader())
        request = frame()->loader().provisionalDocumentLoader()->originalRequest();
    request.setURL(baseURL);

    FrameLoadRequest frameRequest(0, request, SubstituteData(data, mimeType, textEncoding, unreachableURL));
    ASSERT(frameRequest.substituteData().isValid());
    frameRequest.setLockBackForwardList(replace);
    frame()->loader().load(frameRequest);
}

void WebFrameImpl::loadHTMLString(const WebData& data, const WebURL& baseURL, const WebURL& unreachableURL, bool replace)
{
    ASSERT(frame());
    loadData(data, WebString::fromUTF8("text/html"), WebString::fromUTF8("UTF-8"), baseURL, unreachableURL, replace);
}

bool WebFrameImpl::isLoading() const
{
    if (!frame())
        return false;
    return frame()->loader().isLoading();
}

void WebFrameImpl::stopLoading()
{
    if (!frame())
        return;
    // FIXME: Figure out what we should really do here.  It seems like a bug
    // that FrameLoader::stopLoading doesn't call stopAllLoaders.
    frame()->loader().stopAllLoaders();
}

WebDataSource* WebFrameImpl::provisionalDataSource() const
{
    ASSERT(frame());

    // We regard the policy document loader as still provisional.
    DocumentLoader* documentLoader = frame()->loader().provisionalDocumentLoader();
    if (!documentLoader)
        documentLoader = frame()->loader().policyDocumentLoader();

    return DataSourceForDocLoader(documentLoader);
}

WebDataSource* WebFrameImpl::dataSource() const
{
    ASSERT(frame());
    return DataSourceForDocLoader(frame()->loader().documentLoader());
}

WebHistoryItem WebFrameImpl::previousHistoryItem() const
{
    ASSERT(frame());
    // We use the previous item here because documentState (filled-out forms)
    // only get saved to history when it becomes the previous item.  The caller
    // is expected to query the history item after a navigation occurs, after
    // the desired history item has become the previous entry.
    return WebHistoryItem(frame()->page()->historyController().previousItemForExport());
}

WebHistoryItem WebFrameImpl::currentHistoryItem() const
{
    ASSERT(frame());

    // We're shutting down.
    if (!frame()->loader().documentLoader())
        return WebHistoryItem();

    // Lazily update the document state if it was dirtied. Doing it here
    // avoids synchronously serializing forms as they're changing.
    frame()->loader().saveDocumentState();

    return WebHistoryItem(frame()->page()->historyController().currentItemForExport());
}

void WebFrameImpl::enableViewSourceMode(bool enable)
{
    if (frame())
        frame()->setInViewSourceMode(enable);
}

bool WebFrameImpl::isViewSourceModeEnabled() const
{
    if (!frame())
        return false;
    return frame()->inViewSourceMode();
}

void WebFrameImpl::setReferrerForRequest(WebURLRequest& request, const WebURL& referrerURL)
{
    String referrer = referrerURL.isEmpty() ? frame()->document()->outgoingReferrer() : String(referrerURL.spec().utf16());
    referrer = SecurityPolicy::generateReferrerHeader(frame()->document()->referrerPolicy(), request.url(), referrer);
    if (referrer.isEmpty())
        return;
    request.setHTTPReferrer(referrer, static_cast<WebReferrerPolicy>(frame()->document()->referrerPolicy()));
}

void WebFrameImpl::dispatchWillSendRequest(WebURLRequest& request)
{
    ResourceResponse response;
    frame()->loader().client()->dispatchWillSendRequest(0, 0, request.toMutableResourceRequest(), response);
}

WebURLLoader* WebFrameImpl::createAssociatedURLLoader(const WebURLLoaderOptions& options)
{
    return new AssociatedURLLoader(this, options);
}

unsigned WebFrameImpl::unloadListenerCount() const
{
    return frame()->domWindow()->pendingUnloadEventListeners();
}

void WebFrameImpl::replaceSelection(const WebString& text)
{
    bool selectReplacement = false;
    bool smartReplace = true;
    frame()->editor().replaceSelectionWithText(text, selectReplacement, smartReplace);
}

void WebFrameImpl::insertText(const WebString& text)
{
    if (frame()->inputMethodController().hasComposition())
        frame()->inputMethodController().confirmComposition(text);
    else
        frame()->editor().insertText(text, 0);
}

void WebFrameImpl::setMarkedText(const WebString& text, unsigned location, unsigned length)
{
    Vector<CompositionUnderline> decorations;
    frame()->inputMethodController().setComposition(text, decorations, location, length);
}

void WebFrameImpl::unmarkText()
{
    frame()->inputMethodController().cancelComposition();
}

bool WebFrameImpl::hasMarkedText() const
{
    return frame()->inputMethodController().hasComposition();
}

WebRange WebFrameImpl::markedRange() const
{
    return frame()->inputMethodController().compositionRange();
}

bool WebFrameImpl::firstRectForCharacterRange(unsigned location, unsigned length, WebRect& rect) const
{
    if ((location + length < location) && (location + length))
        length = 0;

    Element* editable = frame()->selection().rootEditableElementOrDocumentElement();
    ASSERT(editable);
    RefPtrWillBeRawPtr<Range> range = PlainTextRange(location, location + length).createRange(*editable);
    if (!range)
        return false;
    IntRect intRect = frame()->editor().firstRectForRange(range.get());
    rect = WebRect(intRect);
    rect = frame()->view()->contentsToWindow(rect);
    return true;
}

size_t WebFrameImpl::characterIndexForPoint(const WebPoint& webPoint) const
{
    if (!frame())
        return kNotFound;

    IntPoint point = frame()->view()->windowToContents(webPoint);
    HitTestResult result = frame()->eventHandler().hitTestResultAtPoint(point, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent);
    RefPtrWillBeRawPtr<Range> range = frame()->rangeForPoint(result.roundedPointInInnerNodeFrame());
    if (!range)
        return kNotFound;
    Element* editable = frame()->selection().rootEditableElementOrDocumentElement();
    ASSERT(editable);
    return PlainTextRange::create(*editable, *range.get()).start();
}

bool WebFrameImpl::executeCommand(const WebString& name, const WebNode& node)
{
    ASSERT(frame());

    if (name.length() <= 2)
        return false;

    // Since we don't have NSControl, we will convert the format of command
    // string and call the function on Editor directly.
    String command = name;

    // Make sure the first letter is upper case.
    command.replace(0, 1, command.substring(0, 1).upper());

    // Remove the trailing ':' if existing.
    if (command[command.length() - 1] == UChar(':'))
        command = command.substring(0, command.length() - 1);

    WebPluginContainerImpl* pluginContainer = pluginContainerFromNode(frame(), node);
    if (pluginContainer && pluginContainer->executeEditCommand(name))
        return true;

    bool result = true;

    // Specially handling commands that Editor::execCommand does not directly
    // support.
    if (command == "DeleteToEndOfParagraph") {
        if (!frame()->editor().deleteWithDirection(DirectionForward, ParagraphBoundary, true, false))
            frame()->editor().deleteWithDirection(DirectionForward, CharacterGranularity, true, false);
    } else if (command == "Indent") {
        frame()->editor().indent();
    } else if (command == "Outdent") {
        frame()->editor().outdent();
    } else if (command == "DeleteBackward") {
        result = frame()->editor().command(AtomicString("BackwardDelete")).execute();
    } else if (command == "DeleteForward") {
        result = frame()->editor().command(AtomicString("ForwardDelete")).execute();
    } else if (command == "AdvanceToNextMisspelling") {
        // Wee need to pass false here or else the currently selected word will never be skipped.
        frame()->spellChecker().advanceToNextMisspelling(false);
    } else if (command == "ToggleSpellPanel") {
        frame()->spellChecker().showSpellingGuessPanel();
    } else {
        result = frame()->editor().command(command).execute();
    }
    return result;
}

bool WebFrameImpl::executeCommand(const WebString& name, const WebString& value, const WebNode& node)
{
    ASSERT(frame());
    String webName = name;

    WebPluginContainerImpl* pluginContainer = pluginContainerFromNode(frame(), node);
    if (pluginContainer && pluginContainer->executeEditCommand(name, value))
        return true;

    // moveToBeginningOfDocument and moveToEndfDocument are only handled by WebKit for editable nodes.
    if (!frame()->editor().canEdit() && webName == "moveToBeginningOfDocument")
        return viewImpl()->bubblingScroll(ScrollUp, ScrollByDocument);

    if (!frame()->editor().canEdit() && webName == "moveToEndOfDocument")
        return viewImpl()->bubblingScroll(ScrollDown, ScrollByDocument);

    if (webName == "showGuessPanel") {
        frame()->spellChecker().showSpellingGuessPanel();
        return true;
    }

    return frame()->editor().command(webName).execute(value);
}

bool WebFrameImpl::isCommandEnabled(const WebString& name) const
{
    ASSERT(frame());
    return frame()->editor().command(name).isEnabled();
}

void WebFrameImpl::enableContinuousSpellChecking(bool enable)
{
    if (enable == isContinuousSpellCheckingEnabled())
        return;
    frame()->spellChecker().toggleContinuousSpellChecking();
}

bool WebFrameImpl::isContinuousSpellCheckingEnabled() const
{
    return frame()->spellChecker().isContinuousSpellCheckingEnabled();
}

void WebFrameImpl::requestTextChecking(const WebElement& webElement)
{
    if (webElement.isNull())
        return;
    frame()->spellChecker().requestTextChecking(*webElement.constUnwrap<Element>());
}

void WebFrameImpl::replaceMisspelledRange(const WebString& text)
{
    // If this caret selection has two or more markers, this function replace the range covered by the first marker with the specified word as Microsoft Word does.
    if (pluginContainerFromFrame(frame()))
        return;
    RefPtrWillBeRawPtr<Range> caretRange = frame()->selection().toNormalizedRange();
    if (!caretRange)
        return;
    Vector<DocumentMarker*> markers = frame()->document()->markers().markersInRange(caretRange.get(), DocumentMarker::MisspellingMarkers());
    if (markers.size() < 1 || markers[0]->startOffset() >= markers[0]->endOffset())
        return;
    RefPtrWillBeRawPtr<Range> markerRange = Range::create(caretRange->ownerDocument(), caretRange->startContainer(), markers[0]->startOffset(), caretRange->endContainer(), markers[0]->endOffset());
    if (!markerRange)
        return;
    frame()->selection().setSelection(VisibleSelection(markerRange.get()), CharacterGranularity);
    frame()->editor().replaceSelectionWithText(text, false, false);
}

void WebFrameImpl::removeSpellingMarkers()
{
    frame()->document()->markers().removeMarkers(DocumentMarker::MisspellingMarkers());
}

bool WebFrameImpl::hasSelection() const
{
    WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame());
    if (pluginContainer)
        return pluginContainer->plugin()->hasSelection();

    // frame()->selection()->isNone() never returns true.
    return frame()->selection().start() != frame()->selection().end();
}

WebRange WebFrameImpl::selectionRange() const
{
    return frame()->selection().toNormalizedRange();
}

WebString WebFrameImpl::selectionAsText() const
{
    WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame());
    if (pluginContainer)
        return pluginContainer->plugin()->selectionAsText();

    RefPtrWillBeRawPtr<Range> range = frame()->selection().toNormalizedRange();
    if (!range)
        return WebString();

    String text = range->text();
#if OS(WIN)
    replaceNewlinesWithWindowsStyleNewlines(text);
#endif
    replaceNBSPWithSpace(text);
    return text;
}

WebString WebFrameImpl::selectionAsMarkup() const
{
    WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame());
    if (pluginContainer)
        return pluginContainer->plugin()->selectionAsMarkup();

    RefPtrWillBeRawPtr<Range> range = frame()->selection().toNormalizedRange();
    if (!range)
        return WebString();

    return createMarkup(range.get(), 0, AnnotateForInterchange, false, ResolveNonLocalURLs);
}

void WebFrameImpl::selectWordAroundPosition(LocalFrame* frame, VisiblePosition position)
{
    VisibleSelection selection(position);
    selection.expandUsingGranularity(WordGranularity);

    TextGranularity granularity = selection.isRange() ? WordGranularity : CharacterGranularity;
    frame->selection().setSelection(selection, granularity);
}

bool WebFrameImpl::selectWordAroundCaret()
{
    FrameSelection& selection = frame()->selection();
    ASSERT(!selection.isNone());
    if (selection.isNone() || selection.isRange())
        return false;
    selectWordAroundPosition(frame(), selection.selection().visibleStart());
    return true;
}

void WebFrameImpl::selectRange(const WebPoint& base, const WebPoint& extent)
{
    moveRangeSelection(base, extent);
}

void WebFrameImpl::selectRange(const WebRange& webRange)
{
    if (RefPtrWillBeRawPtr<Range> range = static_cast<PassRefPtrWillBeRawPtr<Range> >(webRange))
        frame()->selection().setSelectedRange(range.get(), WebCore::VP_DEFAULT_AFFINITY, false);
}

void WebFrameImpl::moveRangeSelection(const WebPoint& base, const WebPoint& extent)
{
    VisiblePosition basePosition = visiblePositionForWindowPoint(base);
    VisiblePosition extentPosition = visiblePositionForWindowPoint(extent);
    VisibleSelection newSelection = VisibleSelection(basePosition, extentPosition);
    frame()->selection().setSelection(newSelection, CharacterGranularity);
}

void WebFrameImpl::moveCaretSelection(const WebPoint& point)
{
    Element* editable = frame()->selection().rootEditableElement();
    if (!editable)
        return;

    VisiblePosition position = visiblePositionForWindowPoint(point);
    frame()->selection().moveTo(position, UserTriggered);
}

bool WebFrameImpl::setEditableSelectionOffsets(int start, int end)
{
    return frame()->inputMethodController().setEditableSelectionOffsets(PlainTextRange(start, end));
}

bool WebFrameImpl::setCompositionFromExistingText(int compositionStart, int compositionEnd, const WebVector<WebCompositionUnderline>& underlines)
{
    if (!frame()->editor().canEdit())
        return false;

    InputMethodController& inputMethodController = frame()->inputMethodController();
    inputMethodController.cancelComposition();

    if (compositionStart == compositionEnd)
        return true;

    inputMethodController.setCompositionFromExistingText(CompositionUnderlineVectorBuilder(underlines), compositionStart, compositionEnd);

    return true;
}

void WebFrameImpl::extendSelectionAndDelete(int before, int after)
{
    if (WebPlugin* plugin = focusedPluginIfInputMethodSupported()) {
        plugin->extendSelectionAndDelete(before, after);
        return;
    }
    frame()->inputMethodController().extendSelectionAndDelete(before, after);
}

void WebFrameImpl::setCaretVisible(bool visible)
{
    frame()->selection().setCaretVisible(visible);
}

VisiblePosition WebFrameImpl::visiblePositionForWindowPoint(const WebPoint& point)
{
    FloatPoint unscaledPoint(point);
    unscaledPoint.scale(1 / view()->pageScaleFactor(), 1 / view()->pageScaleFactor());

    HitTestRequest request = HitTestRequest::Move | HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::IgnoreClipping | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent;
    HitTestResult result(frame()->view()->windowToContents(roundedIntPoint(unscaledPoint)));
    frame()->document()->renderView()->layer()->hitTest(request, result);

    if (Node* node = result.targetNode())
        return frame()->selection().selection().visiblePositionRespectingEditingBoundary(result.localPoint(), node);
    return VisiblePosition();
}

WebPlugin* WebFrameImpl::focusedPluginIfInputMethodSupported()
{
    WebPluginContainerImpl* container = WebFrameImpl::pluginContainerFromNode(frame(), WebNode(frame()->document()->focusedElement()));
    if (container && container->supportsInputMethod())
        return container->plugin();
    return 0;
}

int WebFrameImpl::printBegin(const WebPrintParams& printParams, const WebNode& constrainToNode)
{
    ASSERT(!frame()->document()->isFrameSet());
    WebPluginContainerImpl* pluginContainer = 0;
    if (constrainToNode.isNull()) {
        // If this is a plugin document, check if the plugin supports its own
        // printing. If it does, we will delegate all printing to that.
        pluginContainer = pluginContainerFromFrame(frame());
    } else {
        // We only support printing plugin nodes for now.
        pluginContainer = toWebPluginContainerImpl(constrainToNode.pluginContainer());
    }

    if (pluginContainer && pluginContainer->supportsPaginatedPrint())
        m_printContext = adoptPtr(new ChromePluginPrintContext(frame(), pluginContainer, printParams));
    else
        m_printContext = adoptPtr(new ChromePrintContext(frame()));

    FloatRect rect(0, 0, static_cast<float>(printParams.printContentArea.width), static_cast<float>(printParams.printContentArea.height));
    m_printContext->begin(rect.width(), rect.height());
    float pageHeight;
    // We ignore the overlays calculation for now since they are generated in the
    // browser. pageHeight is actually an output parameter.
    m_printContext->computePageRects(rect, 0, 0, 1.0, pageHeight);

    return m_printContext->pageCount();
}

float WebFrameImpl::getPrintPageShrink(int page)
{
    ASSERT(m_printContext && page >= 0);
    return m_printContext->getPageShrink(page);
}

float WebFrameImpl::printPage(int page, WebCanvas* canvas)
{
#if ENABLE(PRINTING)
    ASSERT(m_printContext && page >= 0 && frame() && frame()->document());

    GraphicsContext graphicsContext(canvas);
    graphicsContext.setPrinting(true);
    return m_printContext->spoolPage(graphicsContext, page);
#else
    return 0;
#endif
}

void WebFrameImpl::printEnd()
{
    ASSERT(m_printContext);
    m_printContext->end();
    m_printContext.clear();
}

bool WebFrameImpl::isPrintScalingDisabledForPlugin(const WebNode& node)
{
    WebPluginContainerImpl* pluginContainer =  node.isNull() ? pluginContainerFromFrame(frame()) : toWebPluginContainerImpl(node.pluginContainer());

    if (!pluginContainer || !pluginContainer->supportsPaginatedPrint())
        return false;

    return pluginContainer->isPrintScalingDisabled();
}

bool WebFrameImpl::hasCustomPageSizeStyle(int pageIndex)
{
    return frame()->document()->styleForPage(pageIndex)->pageSizeType() != PAGE_SIZE_AUTO;
}

bool WebFrameImpl::isPageBoxVisible(int pageIndex)
{
    return frame()->document()->isPageBoxVisible(pageIndex);
}

void WebFrameImpl::pageSizeAndMarginsInPixels(int pageIndex, WebSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft)
{
    IntSize size = pageSize;
    frame()->document()->pageSizeAndMarginsInPixels(pageIndex, size, marginTop, marginRight, marginBottom, marginLeft);
    pageSize = size;
}

WebString WebFrameImpl::pageProperty(const WebString& propertyName, int pageIndex)
{
    ASSERT(m_printContext);
    return m_printContext->pageProperty(frame(), propertyName.utf8().data(), pageIndex);
}

bool WebFrameImpl::find(int identifier, const WebString& searchText, const WebFindOptions& options, bool wrapWithinFrame, WebRect* selectionRect)
{
    return ensureTextFinder().find(identifier, searchText, options, wrapWithinFrame, selectionRect);
}

void WebFrameImpl::stopFinding(bool clearSelection)
{
    if (m_textFinder) {
        if (!clearSelection)
            setFindEndstateFocusAndSelection();
        m_textFinder->stopFindingAndClearSelection();
    }
}

void WebFrameImpl::scopeStringMatches(int identifier, const WebString& searchText, const WebFindOptions& options, bool reset)
{
    ensureTextFinder().scopeStringMatches(identifier, searchText, options, reset);
}

void WebFrameImpl::cancelPendingScopingEffort()
{
    if (m_textFinder)
        m_textFinder->cancelPendingScopingEffort();
}

void WebFrameImpl::increaseMatchCount(int count, int identifier)
{
    // This function should only be called on the mainframe.
    ASSERT(!parent());
    ASSERT(m_textFinder);
    m_textFinder->increaseMatchCount(identifier, count);
}

void WebFrameImpl::resetMatchCount()
{
    ASSERT(m_textFinder);
    m_textFinder->resetMatchCount();
}

void WebFrameImpl::sendOrientationChangeEvent(int orientation)
{
    if (frame())
        frame()->sendOrientationChangeEvent(orientation);
}

void WebFrameImpl::dispatchMessageEventWithOriginCheck(const WebSecurityOrigin& intendedTargetOrigin, const WebDOMEvent& event)
{
    ASSERT(!event.isNull());
    frame()->domWindow()->dispatchMessageEventWithOriginCheck(intendedTargetOrigin.get(), event, nullptr);
}

int WebFrameImpl::findMatchMarkersVersion() const
{
    ASSERT(!parent());

    if (m_textFinder)
        return m_textFinder->findMatchMarkersVersion();
    return 0;
}

int WebFrameImpl::selectNearestFindMatch(const WebFloatPoint& point, WebRect* selectionRect)
{
    ASSERT(!parent());
    ASSERT(m_textFinder);
    return m_textFinder->selectNearestFindMatch(point, selectionRect);
}

WebFloatRect WebFrameImpl::activeFindMatchRect()
{
    ASSERT(!parent());

    if (m_textFinder)
        return m_textFinder->activeFindMatchRect();
    return WebFloatRect();
}

void WebFrameImpl::findMatchRects(WebVector<WebFloatRect>& outputRects)
{
    ASSERT(!parent());
    ASSERT(m_textFinder);
    m_textFinder->findMatchRects(outputRects);
}

void WebFrameImpl::setTickmarks(const WebVector<WebRect>& tickmarks)
{
    if (frameView()) {
        Vector<IntRect> tickmarksConverted(tickmarks.size());
        for (size_t i = 0; i < tickmarks.size(); ++i)
            tickmarksConverted[i] = tickmarks[i];
        frameView()->setTickmarks(tickmarksConverted);
        invalidateScrollbar();
    }
}

WebString WebFrameImpl::contentAsText(size_t maxChars) const
{
    if (!frame())
        return WebString();
    StringBuilder text;
    frameContentAsPlainText(maxChars, frame(), text);
    return text.toString();
}

WebString WebFrameImpl::contentAsMarkup() const
{
    if (!frame())
        return WebString();
    return createFullMarkup(frame()->document());
}

WebString WebFrameImpl::renderTreeAsText(RenderAsTextControls toShow) const
{
    RenderAsTextBehavior behavior = RenderAsTextBehaviorNormal;

    if (toShow & RenderAsTextDebug)
        behavior |= RenderAsTextShowCompositedLayers | RenderAsTextShowAddresses | RenderAsTextShowIDAndClass | RenderAsTextShowLayerNesting;

    if (toShow & RenderAsTextPrinting)
        behavior |= RenderAsTextPrintingMode;

    return externalRepresentation(frame(), behavior);
}

WebString WebFrameImpl::markerTextForListItem(const WebElement& webElement) const
{
    return WebCore::markerTextForListItem(const_cast<Element*>(webElement.constUnwrap<Element>()));
}

void WebFrameImpl::printPagesWithBoundaries(WebCanvas* canvas, const WebSize& pageSizeInPixels)
{
    ASSERT(m_printContext);

    GraphicsContext graphicsContext(canvas);
    graphicsContext.setPrinting(true);

    m_printContext->spoolAllPagesWithBoundaries(graphicsContext, FloatSize(pageSizeInPixels.width, pageSizeInPixels.height));
}

WebRect WebFrameImpl::selectionBoundsRect() const
{
    return hasSelection() ? WebRect(IntRect(frame()->selection().bounds(false))) : WebRect();
}

bool WebFrameImpl::selectionStartHasSpellingMarkerFor(int from, int length) const
{
    if (!frame())
        return false;
    return frame()->spellChecker().selectionStartHasMarkerFor(DocumentMarker::Spelling, from, length);
}

WebString WebFrameImpl::layerTreeAsText(bool showDebugInfo) const
{
    if (!frame())
        return WebString();

    return WebString(frame()->layerTreeAsText(showDebugInfo ? LayerTreeIncludesDebugInfo : LayerTreeNormal));
}

// WebFrameImpl public ---------------------------------------------------------

WebLocalFrame* WebFrame::create(WebFrameClient* client)
{
    return WebFrameImpl::create(client);
}

WebFrameImpl* WebFrameImpl::create(WebFrameClient* client)
{
    return adoptRef(new WebFrameImpl(client)).leakRef();
}

WebFrameImpl::WebFrameImpl(WebFrameClient* client)
    : m_frameLoaderClientImpl(this)
    , m_parent(0)
    , m_previousSibling(0)
    , m_nextSibling(0)
    , m_firstChild(0)
    , m_lastChild(0)
    , m_opener(0)
    , m_client(client)
    , m_permissionClient(0)
    , m_inputEventsScaleFactorForEmulation(1)
{
    blink::Platform::current()->incrementStatsCounter(webFrameActiveCount);
    frameCount++;
}

WebFrameImpl::~WebFrameImpl()
{
    HashSet<WebFrameImpl*>::iterator end = m_openedFrames.end();
    for (HashSet<WebFrameImpl*>::iterator it = m_openedFrames.begin(); it != end; ++it)
        (*it)->m_opener = 0;

    blink::Platform::current()->decrementStatsCounter(webFrameActiveCount);
    frameCount--;

    cancelPendingScopingEffort();
}

void WebFrameImpl::setWebCoreFrame(PassRefPtr<WebCore::LocalFrame> frame)
{
    m_frame = frame;
}

void WebFrameImpl::initializeAsMainFrame(WebCore::Page* page)
{
    setWebCoreFrame(LocalFrame::create(&m_frameLoaderClientImpl, &page->frameHost(), 0));

    // We must call init() after m_frame is assigned because it is referenced
    // during init().
    m_frame->init();
}

PassRefPtr<LocalFrame> WebFrameImpl::createChildFrame(const FrameLoadRequest& request, HTMLFrameOwnerElement* ownerElement)
{
    ASSERT(m_client);
    WebFrameImpl* webframe = toWebFrameImpl(m_client->createChildFrame(this, request.frameName()));
    if (!webframe)
        return nullptr;

    RefPtr<LocalFrame> childFrame = LocalFrame::create(&webframe->m_frameLoaderClientImpl, frame()->host(), ownerElement);
    webframe->setWebCoreFrame(childFrame);

    // FIXME: Using subResourceAttributeName as fallback is not a perfect
    // solution. subResourceAttributeName returns just one attribute name. The
    // element might not have the attribute, and there might be other attributes
    // which can identify the element.
    childFrame->tree().setName(request.frameName(), ownerElement->getAttribute(ownerElement->subResourceAttributeName()));

    // FIXME: This comment is not quite accurate anymore.
    // LocalFrame::init() can trigger onload event in the parent frame,
    // which may detach this frame and trigger a null-pointer access
    // in FrameTree::removeChild. Move init() after appendChild call
    // so that webframe->mFrame is in the tree before triggering
    // onload event handler.
    // Because the event handler may set webframe->mFrame to null,
    // it is necessary to check the value after calling init() and
    // return without loading URL.
    // NOTE: m_client will be null if this frame has been detached.
    // (b:791612)
    childFrame->init(); // create an empty document
    if (!childFrame->tree().parent())
        return nullptr;

    // If we're moving in the back/forward list, we might want to replace the content
    // of this child frame with whatever was there at that point.
    RefPtr<HistoryItem> childItem;
    if (isBackForwardLoadType(frame()->loader().loadType()) && !frame()->document()->loadEventFinished()) {
        childItem = PassRefPtr<HistoryItem>(webframe->client()->historyItemForNewChildFrame(webframe));
        if (!childItem)
            childItem = frame()->page()->historyController().itemForNewChildFrame(childFrame.get());
    }

    if (childItem)
        childFrame->loader().loadHistoryItem(childItem.get());
    else
        childFrame->loader().load(FrameLoadRequest(0, request.resourceRequest(), "_self"));

    // A synchronous navigation (about:blank) would have already processed
    // onload, so it is possible for the frame to have already been destroyed by
    // script in the page.
    // NOTE: m_client will be null if this frame has been detached.
    if (!childFrame->tree().parent())
        return nullptr;

    return childFrame.release();
}

void WebFrameImpl::didChangeContentsSize(const IntSize& size)
{
    // This is only possible on the main frame.
    if (m_textFinder && m_textFinder->totalMatchCount() > 0) {
        ASSERT(!parent());
        m_textFinder->increaseMarkerVersion();
    }
}

void WebFrameImpl::createFrameView()
{
    TRACE_EVENT0("webkit", "WebFrameImpl::createFrameView");

    ASSERT(frame()); // If frame() doesn't exist, we probably didn't init properly.

    WebViewImpl* webView = viewImpl();
    bool isMainFrame = webView->mainFrameImpl()->frame() == frame();
    if (isMainFrame)
        webView->suppressInvalidations(true);

    frame()->createView(webView->size(), webView->baseBackgroundColor(), webView->isTransparent());
    if (webView->shouldAutoResize() && isMainFrame)
        frame()->view()->enableAutoSizeMode(true, webView->minAutoSize(), webView->maxAutoSize());

    frame()->view()->setInputEventsTransformForEmulation(m_inputEventsOffsetForEmulation, m_inputEventsScaleFactorForEmulation);

    if (isMainFrame)
        webView->suppressInvalidations(false);
}

WebFrameImpl* WebFrameImpl::fromFrame(LocalFrame* frame)
{
    if (!frame)
        return 0;
    FrameLoaderClient* client = frame->loader().client();
    if (!client || !client->isFrameLoaderClientImpl())
        return 0;
    return toFrameLoaderClientImpl(client)->webFrame();
}

WebFrameImpl* WebFrameImpl::fromFrameOwnerElement(Element* element)
{
    // FIXME: Why do we check specifically for <iframe> and <frame> here? Why can't we get the WebFrameImpl from an <object> element, for example.
    if (!isHTMLFrameElementBase(element))
        return 0;
    return fromFrame(toLocalFrame(toHTMLFrameElementBase(element)->contentFrame()));
}

WebViewImpl* WebFrameImpl::viewImpl() const
{
    if (!frame())
        return 0;
    return WebViewImpl::fromPage(frame()->page());
}

WebDataSourceImpl* WebFrameImpl::dataSourceImpl() const
{
    return static_cast<WebDataSourceImpl*>(dataSource());
}

WebDataSourceImpl* WebFrameImpl::provisionalDataSourceImpl() const
{
    return static_cast<WebDataSourceImpl*>(provisionalDataSource());
}

void WebFrameImpl::setFindEndstateFocusAndSelection()
{
    WebFrameImpl* mainFrameImpl = viewImpl()->mainFrameImpl();

    if (this != mainFrameImpl->activeMatchFrame())
        return;

    if (Range* activeMatch = m_textFinder->activeMatch()) {
        // If the user has set the selection since the match was found, we
        // don't focus anything.
        VisibleSelection selection(frame()->selection().selection());
        if (!selection.isNone())
            return;

        // Try to find the first focusable node up the chain, which will, for
        // example, focus links if we have found text within the link.
        Node* node = activeMatch->firstNode();
        if (node && node->isInShadowTree()) {
            if (Node* host = node->shadowHost()) {
                if (isHTMLInputElement(*host) || isHTMLTextAreaElement(*host))
                    node = host;
            }
        }
        for (; node; node = node->parentNode()) {
            if (!node->isElementNode())
                continue;
            Element* element = toElement(node);
            if (element->isFocusable()) {
                // Found a focusable parent node. Set the active match as the
                // selection and focus to the focusable node.
                frame()->selection().setSelection(VisibleSelection(activeMatch));
                frame()->document()->setFocusedElement(element);
                return;
            }
        }

        // Iterate over all the nodes in the range until we find a focusable node.
        // This, for example, sets focus to the first link if you search for
        // text and text that is within one or more links.
        node = activeMatch->firstNode();
        for (; node && node != activeMatch->pastLastNode(); node = NodeTraversal::next(*node)) {
            if (!node->isElementNode())
                continue;
            Element* element = toElement(node);
            if (element->isFocusable()) {
                frame()->document()->setFocusedElement(element);
                return;
            }
        }

        // No node related to the active match was focusable, so set the
        // active match as the selection (so that when you end the Find session,
        // you'll have the last thing you found highlighted) and make sure that
        // we have nothing focused (otherwise you might have text selected but
        // a link focused, which is weird).
        frame()->selection().setSelection(VisibleSelection(activeMatch));
        frame()->document()->setFocusedElement(nullptr);

        // Finally clear the active match, for two reasons:
        // We just finished the find 'session' and we don't want future (potentially
        // unrelated) find 'sessions' operations to start at the same place.
        // The WebFrameImpl could get reused and the activeMatch could end up pointing
        // to a document that is no longer valid. Keeping an invalid reference around
        // is just asking for trouble.
        m_textFinder->resetActiveMatch();
    }
}

void WebFrameImpl::didFail(const ResourceError& error, bool wasProvisional)
{
    if (!client())
        return;
    WebURLError webError = error;
    if (wasProvisional)
        client()->didFailProvisionalLoad(this, webError);
    else
        client()->didFailLoad(this, webError);
}

void WebFrameImpl::setCanHaveScrollbars(bool canHaveScrollbars)
{
    frame()->view()->setCanHaveScrollbars(canHaveScrollbars);
}

void WebFrameImpl::setInputEventsTransformForEmulation(const IntSize& offset, float contentScaleFactor)
{
    m_inputEventsOffsetForEmulation = offset;
    m_inputEventsScaleFactorForEmulation = contentScaleFactor;
    if (frame()->view())
        frame()->view()->setInputEventsTransformForEmulation(m_inputEventsOffsetForEmulation, m_inputEventsScaleFactorForEmulation);
}

void WebFrameImpl::loadJavaScriptURL(const KURL& url)
{
    // This is copied from ScriptController::executeScriptIfJavaScriptURL.
    // Unfortunately, we cannot just use that method since it is private, and
    // it also doesn't quite behave as we require it to for bookmarklets.  The
    // key difference is that we need to suppress loading the string result
    // from evaluating the JS URL if executing the JS URL resulted in a
    // location change.  We also allow a JS URL to be loaded even if scripts on
    // the page are otherwise disabled.

    if (!frame()->document() || !frame()->page())
        return;

    RefPtr<Document> ownerDocument(frame()->document());

    // Protect privileged pages against bookmarklets and other javascript manipulations.
    if (SchemeRegistry::shouldTreatURLSchemeAsNotAllowingJavascriptURLs(frame()->document()->url().protocol()))
        return;

    String script = decodeURLEscapeSequences(url.string().substring(strlen("javascript:")));
    UserGestureIndicator gestureIndicator(DefinitelyProcessingNewUserGesture);
    ScriptValue result = frame()->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));

    String scriptResult;
    if (!result.getString(scriptResult))
        return;

    if (!frame()->navigationScheduler().locationChangePending())
        frame()->document()->loader()->replaceDocument(scriptResult, ownerDocument.get());
}

void WebFrameImpl::willDetachParent()
{
    // Do not expect string scoping results from any frames that got detached
    // in the middle of the operation.
    if (m_textFinder && m_textFinder->scopingInProgress()) {

        // There is a possibility that the frame being detached was the only
        // pending one. We need to make sure final replies can be sent.
        m_textFinder->flushCurrentScoping();

        m_textFinder->cancelPendingScopingEffort();
    }
}

WebFrameImpl* WebFrameImpl::activeMatchFrame() const
{
    ASSERT(!parent());

    if (m_textFinder)
        return m_textFinder->activeMatchFrame();
    return 0;
}

WebCore::Range* WebFrameImpl::activeMatch() const
{
    if (m_textFinder)
        return m_textFinder->activeMatch();
    return 0;
}

TextFinder& WebFrameImpl::ensureTextFinder()
{
    if (!m_textFinder)
        m_textFinder = TextFinder::create(*this);

    return *m_textFinder;
}

void WebFrameImpl::invalidateScrollbar() const
{
    ASSERT(frame() && frame()->view());
    FrameView* view = frame()->view();
    // Invalidate the vertical scroll bar region for the view.
    Scrollbar* scrollbar = view->verticalScrollbar();
    if (scrollbar)
        scrollbar->invalidate();
}

void WebFrameImpl::invalidateAll() const
{
    ASSERT(frame() && frame()->view());
    FrameView* view = frame()->view();
    view->invalidateRect(view->frameRect());
    invalidateScrollbar();
}

} // namespace blink
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root/Source/web/WebFrameImpl.cpp

DEFINITIONS
