C++ Frame::tree方法代码示例

static void printFrames(const WebCore::Frame& frame, const WebCore::Frame* targetFrame, int indent)
{
    if (&frame == targetFrame) {
        printf("--> ");
        printIndent(indent - 1);
    } else
        printIndent(indent);

    WebCore::FrameView* view = frame.view();
    printf("Frame %p %dx%d\n", &frame, view ? view->width() : 0, view ? view->height() : 0);
    printIndent(indent);
    printf("  ownerElement=%p\n", frame.ownerElement());
    printIndent(indent);
    printf("  frameView=%p (needs layout %d)\n", view, view ? view->needsLayout() : false);
    printIndent(indent);
    printf("  renderView=%p\n", view ? view->renderView() : nullptr);
    printIndent(indent);
    printf("  ownerRenderer=%p\n", frame.ownerRenderer());
    printIndent(indent);
    printf("  document=%p (needs style recalc %d)\n", frame.document(), frame.document() ? frame.document()->childNeedsStyleRecalc() : false);
    printIndent(indent);
    printf("  uri=%s\n", frame.document()->documentURI().utf8().data());

    for (WebCore::Frame* child = frame.tree().firstChild(); child; child = child->tree().nextSibling())
        printFrames(*child, targetFrame, indent + 1);
}

PassRefPtr<Frame> FrameLoaderClientEfl::createFrame(const URL& url, const String& name, HTMLFrameOwnerElement* ownerElement, const String& referrer, bool /*allowsScrolling*/, int /*marginWidth*/, int /*marginHeight*/)
{
    ASSERT(m_frame);
    ASSERT(m_view);

    Evas_Object* subFrame = ewk_frame_child_add(m_frame, name, ownerElement);
    if (!subFrame)
        return 0;

    WebCore::Frame* coreSubFrame = EWKPrivate::coreFrame(subFrame);
    ASSERT(coreSubFrame);

    // The creation of the frame may have run arbitrary JavaScript that removed it from the page already.
    if (!coreSubFrame->page()) {
        evas_object_del(subFrame);
        return 0;
    }

    evas_object_smart_callback_call(m_view, "frame,created", subFrame);
    EWKPrivate::coreFrame(m_frame)->loader().loadURLIntoChildFrame(url, referrer, coreSubFrame);

    // The frame's onload handler may have removed it from the document.
    // See fast/dom/null-page-show-modal-dialog-crash.html for an example.
    if (!coreSubFrame->tree().parent()) {
        evas_object_del(subFrame);
        return 0;
    }

    ewk_view_frame_rect_changed(m_view);

    return coreSubFrame;
}

bool ViewNavigationDelegate::ClickElementsByIdOrClass(const char* idOrClassName)
{
	EAW_ASSERT(idOrClassName);
	if(!idOrClassName || !idOrClassName[0])
		return false;

	IOverlayInputClient* pOverlayInputClient = mView->GetOverlayInputClient();

	if(pOverlayInputClient)
		pOverlayInputClient->OnFocusChangeEvent(false);

	bool elementClicked = false;

	WebCore::Frame* pFrame = mView->GetFrame();
	while(pFrame)
	{
		WebCore::Document* document = pFrame->document();
		EAW_ASSERT(document);

		ClickElementsByIdOrClassDelegate delegate(idOrClassName, true);
		DOMWalker<ClickElementsByIdOrClassDelegate> walker(document, delegate);	
		elementClicked = delegate.GetReturnValue();

		if(elementClicked)
			break;

		pFrame = pFrame->tree()->traverseNext();
	}

	return elementClicked;
}

bool ViewNavigationDelegate::JumpToId(const char* jumpToId)
{
	WebCore::Frame* pFrame = mView->GetFrame();
	// Search for the desired element in all the frames
	while(pFrame)
	{
		WebCore::Document* document = pFrame->document();
		EAW_ASSERT(document);

		if (document)
		{
			JumpToElementWithIdDelegate delegate1(mView, jumpToId);

			DOMWalker<JumpToElementWithIdDelegate> walker(document, delegate1);		
			WebCore::Element* element = delegate1.FoundElement();
			if (element)
			{
				return true;
			}
		}
		pFrame = pFrame->tree()->traverseNext();
	}

	return false;
}

WebFrame* WebFrame::traverseNext(bool wrap) const
{
    WebCore::Frame* frame = toWebCoreFrame(this);
    if (!frame)
        return 0;
    return fromFrame(frame->tree().traverseNextWithWrap(wrap));
}

// SAMSUNG CHANGE : CopyImage >>
// Copy Image Issue on Nested Frame
CachedResource *retrieveCachedResource(Frame* frame,  String imageUrl)
{
	if (NULL == frame || imageUrl.isEmpty())
		return NULL;

	FrameTree *frameTree = frame->tree();
	if (!frameTree)
		return frame->document()->cachedResourceLoader()->cachedResource(imageUrl);
	
	WebCore::Frame *childFrame = frameTree->firstChild();
	Document *childFrameDocument = NULL;
	CachedResource* cachedResource = NULL;
	while (childFrame)
	{
		childFrameDocument = 	childFrame->document();
		if (childFrameDocument)
		{
			cachedResource = childFrameDocument->cachedResourceLoader()->cachedResource(imageUrl);
			if (cachedResource)
				break;
		}
		cachedResource = retrieveCachedResource(childFrame, imageUrl);
		if (cachedResource)
			break;
		childFrame = childFrame->tree()->nextSibling();
	}

	if (cachedResource)
		return cachedResource;
	else
		return frame->document()->cachedResourceLoader()->cachedResource(imageUrl);
}

WebFrame* WebFrame::findChildByName(const WebString& name) const
{
    WebCore::Frame* frame = toWebCoreFrame(this);
    if (!frame)
        return 0;
    // FIXME: It's not clear this should ever be called to find a remote frame.
    // Perhaps just disallow that completely?
    return fromFrame(frame->tree().child(name));
}

WebCore::Frame* DumpRenderTreeSupportEfl::frameParent(const Evas_Object* ewkFrame)
{
    WebCore::Frame* frame = EWKPrivate::coreFrame(ewkFrame);

    if (!frame)
        return 0;

    return frame->tree()->parent();
}

static void printFrames(const WebCore::Frame& frame, const WebCore::Frame* targetFrame, int indent)
{
    if (&frame == targetFrame) {
        printf("--> ");
        printIndent(indent - 1);
    } else
        printIndent(indent);

    WebCore::FrameView* view = frame.view();
    printf("Frame %p %dx%d\n", &frame, view ? view->width() : 0, view ? view->height() : 0);
    printIndent(indent);
    printf("  ownerElement=%p\n", frame.ownerElement());
    printIndent(indent);
    printf("  frameView=%p\n", view);
    printIndent(indent);
    printf("  document=%p\n", frame.document());
    printIndent(indent);
    printf("  uri=%s\n\n", frame.document()->documentURI().utf8().data());

    for (WebCore::Frame* child = frame.tree().firstChild(); child; child = child->tree().nextSibling())
        printFrames(*child, targetFrame, indent + 1);
}

String DumpRenderTree::dumpFramesAsText(WebCore::Frame* frame)
{
    String s;
    WebCore::Element* documentElement = frame->document()->documentElement();
    if (!documentElement)
        return s.utf8().data();

    if (frame->tree()->parent())
        s = String::format("\n--------\nFrame: '%s'\n--------\n", frame->tree()->uniqueName().string().utf8().data());

    s = s + documentElement->innerText() + "\n";

    if (gTestRunner->dumpChildFramesAsText()) {
        WebCore::FrameTree* tree = frame->tree();
        for (WebCore::Frame* child = tree->firstChild(); child; child = child->tree()->nextSibling())
            s = s + dumpFramesAsText(child);
    }
    return s;
}

bool ViewNavigationDelegate::ClickElementById(const char* id)
{
	EAW_ASSERT(id);
	if(!id || !id[0])
		return false;

	IOverlayInputClient* pOverlayInputClient = mView->GetOverlayInputClient();


	if(pOverlayInputClient)
		pOverlayInputClient->OnFocusChangeEvent(false);


	bool elementClicked = false;

	WebCore::Frame* pFrame = mView->GetFrame();
	while(pFrame)
	{
		WebCore::Document* document = pFrame->document();
		EAW_ASSERT(document);

		if (document)
		{
			WebCore::Element* element = document->getElementById(id);

			if (element && element->isHTMLElement())
			{    
				WebCore::HTMLElement* htmlElement = (WebCore::HTMLElement*)element;
				htmlElement->click();
				elementClicked = true;
			}
		}

		if(elementClicked)
			break;

		pFrame = pFrame->tree()->traverseNext();
	}

	return elementClicked;
}

Eina_List* DumpRenderTreeSupportEfl::frameChildren(const Evas_Object* ewkFrame)
{
    WebCore::Frame* frame = EWKPrivate::coreFrame(ewkFrame);

    if (!frame)
        return 0;

    Eina_List* childFrames = 0;

    for (unsigned index = 0; index < frame->tree()->childCount(); index++) {
        WebCore::Frame *childFrame = frame->tree()->child(index);
        WebCore::FrameLoaderClientEfl *client = static_cast<WebCore::FrameLoaderClientEfl*>(childFrame->loader()->client());

        if (!client)
            continue;

        childFrames = eina_list_append(childFrames, client->webFrame());
    }

    return childFrames;
}

static void WebHistoryClose(JNIEnv* env, jobject obj, jint frame)
{
    LOG_ASSERT(frame, "Close needs a valid Frame pointer!");
    WebCore::Frame* pFrame = (WebCore::Frame*)frame;

    WebCore::BackForwardList* list = pFrame->page()->backForwardList();
    RefPtr<WebCore::HistoryItem> current = list->currentItem();
    // Remove each item instead of using close(). close() is intended to be used
    // right before the list is deleted.
    WebCore::HistoryItemVector& entries = list->entries();
    int size = entries.size();
    for (int i = size - 1; i >= 0; --i)
        list->removeItem(entries[i].get());
    // Add the current item back to the list.
    if (current) {
        current->setBridge(0);
        // addItem will update the children to match the newly created bridge
        list->addItem(current);

        /*
         * The Grand Prix site uses anchor navigations to change the display.
         * WebKit tries to be smart and not load child frames that have the
         * same history urls during an anchor navigation. This means that the
         * current history item stored in the child frame's loader does not
         * match the item found in the history tree. If we remove all the
         * entries in the back/foward list, we have to restore the entire tree
         * or else a HistoryItem might have a deleted parent.
         *
         * In order to restore the history tree correctly, we have to look up
         * all the frames first and then look up the history item. We do this
         * because the history item in the tree may be null at this point.
         * Unfortunately, a HistoryItem can only search its immediately
         * children so we do a breadth-first rebuild of the tree.
         */

        // Keep a small list of child frames to traverse.
        WTF::Vector<WebCore::Frame*> frameQueue;
        // Fix the top-level item.
        pFrame->loader()->history()->setCurrentItem(current.get());
        WebCore::Frame* child = pFrame->tree()->firstChild();
        // Remember the parent history item so we can search for a child item.
        RefPtr<WebCore::HistoryItem> parent = current;
        while (child) {
            // Use the old history item since the current one may have a
            // deleted parent.
            WebCore::HistoryItem* item = parent->childItemWithTarget(child->tree()->name());
            child->loader()->history()->setCurrentItem(item);
            // Append the first child to the queue if it exists. If there is no
            // item, then we do not need to traverse the children since there
            // will be no parent history item.
            WebCore::Frame* firstChild;
            if (item && (firstChild = child->tree()->firstChild()))
                frameQueue.append(firstChild);
            child = child->tree()->nextSibling();
            // If we don't have a sibling for this frame and the queue isn't
            // empty, use the next entry in the queue.
            if (!child && !frameQueue.isEmpty()) {
                child = frameQueue.at(0);
                frameQueue.remove(0);
                // Figure out the parent history item used when searching for
                // the history item to use.
                parent = child->tree()->parent()->loader()->history()->currentItem();
            }
        }
    }
}

//.........这里部分代码省略.........
	float currentRadialDistance = FLT_MAX; // A high value to start with so that the max distance between any two elements in the surface is under it.
	WebCore::Node* currentBestNode = NULL;
	while(pFrame)
	{
		WebCore::Document* document = pFrame->document();
		EAW_ASSERT(document);

		if(document)
		{
			WebCore::FrameView* pFrameView = document->view();
			WebCore::IntPoint scrollOffset;
			if(pFrameView)
			{
 				scrollOffset.setX(pFrameView->scrollOffset().width());
 				scrollOffset.setY(pFrameView->scrollOffset().height());
			}

			// We figure out the start position(It is center of the currently hovered element almost all the time but can be slightly different 
			// due to scroll sometimes).
			mCentreX = lastX + scrollOffset.x();
			mCentreY = lastY + scrollOffset.y();

			DocumentNavigator navigator(mView, document, direction, WebCore::IntPoint(mCentreX, mCentreY), mBestNodeX, mBestNodeY, mBestNodeWidth, mBestNodeHeight, mJumpNavigationParams.mNavigationTheta, mJumpNavigationParams.mStrictAxesCheck, currentRadialDistance);
			navigator.FindBestNode(document);

			if(navigator.GetBestNode())
			{
				currentBestNode			= navigator.GetBestNode();
				currentRadialDistance	= navigator.GetBestNodeRadialDistance();
			}

		}

		pFrame = pFrame->tree()->traverseNext();
	}

	bool foundSomething = false;
	if (currentBestNode) //We found the node to navigate. Move the cursor and we are done.
	{
		foundSomething = true;
		MoveMouseCursorToNode(currentBestNode, false);
	}
	else if(scrollIfElementNotFound)// Node is not found. 
	{
		// Based on the intended direction of movement, scroll so that some newer elements are visible.
		
		int cursorPosBeforeScrollX, cursorPosBeforeScrollY;
		mView->GetCursorPosition(cursorPosBeforeScrollX, cursorPosBeforeScrollY);

		switch(direction)
		{
		case EA::WebKit::JumpDown:
			{
				ScrollOnJump(true, -120, mJumpNavigationParams.mNumLinesToAutoScroll);
				break;
			}

		case EA::WebKit::JumpUp:
			{
				ScrollOnJump(true, 120, mJumpNavigationParams.mNumLinesToAutoScroll);
				break;
			}
		case EA::WebKit::JumpRight:
			{
				ScrollOnJump(false, -120, mJumpNavigationParams.mNumLinesToAutoScroll);
				break;

static char*
_dumpFramesAsText(LayoutTestController* controller, WebCore::Frame* in_core_frame, bool is_main_frame)
{
    WTF::String result("");

    // Add header for all but the main frame.

    WebCore::FrameView* view = in_core_frame->view();

    if (view && view->layoutPending())
        view->layout();

    WebCore::Element* document_element = in_core_frame->document()->documentElement();
    WTF::String inner_text = document_element->innerText();

    if (!is_main_frame) {
        WTF::String frame_name(in_core_frame->tree().name());
        result.append("\n--------\nFrame: '");
        result.append(frame_name);
        result.append("'\n--------\n");
    }
    result.append(inner_text);
    result.append("\n");

    if (controller->dumpChildFramesAsText()) {
        for (WebCore::Frame* child = in_core_frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
            char* tmp = _dumpFramesAsText(controller, child, false);
            result.append(tmp);
            free(tmp);
        }
    }

    return strdup(result.utf8().data());
}