| /* |
| * Copyright (C) 2007, 2009, 2010 Apple 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: |
| * 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 "DragController.h" |
| |
| #if ENABLE(DRAG_SUPPORT) |
| #include "Clipboard.h" |
| #include "ClipboardAccessPolicy.h" |
| #include "CachedResourceLoader.h" |
| #include "Document.h" |
| #include "DocumentFragment.h" |
| #include "DragActions.h" |
| #include "DragClient.h" |
| #include "DragData.h" |
| #include "DragSession.h" |
| #include "Editor.h" |
| #include "EditorClient.h" |
| #include "Element.h" |
| #include "EventHandler.h" |
| #include "FloatRect.h" |
| #include "Frame.h" |
| #include "FrameLoader.h" |
| #include "FrameSelection.h" |
| #include "FrameView.h" |
| #include "HTMLAnchorElement.h" |
| #include "HTMLInputElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLPlugInElement.h" |
| #include "HitTestRequest.h" |
| #include "HitTestResult.h" |
| #include "Image.h" |
| #include "ImageOrientation.h" |
| #include "MoveSelectionCommand.h" |
| #include "Node.h" |
| #include "Page.h" |
| #include "PlatformKeyboardEvent.h" |
| #include "RenderFileUploadControl.h" |
| #include "RenderImage.h" |
| #include "RenderView.h" |
| #include "ReplaceSelectionCommand.h" |
| #include "ResourceRequest.h" |
| #include "SecurityOrigin.h" |
| #include "Settings.h" |
| #include "ShadowRoot.h" |
| #include "StylePropertySet.h" |
| #include "Text.h" |
| #include "TextEvent.h" |
| #include "htmlediting.h" |
| #include "markup.h" |
| #include <wtf/CurrentTime.h> |
| #include <wtf/RefPtr.h> |
| |
| namespace WebCore { |
| |
| static PlatformMouseEvent createMouseEvent(DragData* dragData) |
| { |
| bool shiftKey, ctrlKey, altKey, metaKey; |
| shiftKey = ctrlKey = altKey = metaKey = false; |
| int keyState = dragData->modifierKeyState(); |
| shiftKey = static_cast<bool>(keyState & PlatformEvent::ShiftKey); |
| ctrlKey = static_cast<bool>(keyState & PlatformEvent::CtrlKey); |
| altKey = static_cast<bool>(keyState & PlatformEvent::AltKey); |
| metaKey = static_cast<bool>(keyState & PlatformEvent::MetaKey); |
| |
| return PlatformMouseEvent(dragData->clientPosition(), dragData->globalPosition(), |
| LeftButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey, |
| metaKey, currentTime()); |
| } |
| |
| DragController::DragController(Page* page, DragClient* client) |
| : m_page(page) |
| , m_client(client) |
| , m_documentUnderMouse(0) |
| , m_dragInitiator(0) |
| , m_fileInputElementUnderMouse(0) |
| , m_documentIsHandlingDrag(false) |
| , m_dragDestinationAction(DragDestinationActionNone) |
| , m_dragSourceAction(DragSourceActionNone) |
| , m_didInitiateDrag(false) |
| , m_sourceDragOperation(DragOperationNone) |
| { |
| ASSERT(m_client); |
| } |
| |
| DragController::~DragController() |
| { |
| m_client->dragControllerDestroyed(); |
| } |
| |
| PassOwnPtr<DragController> DragController::create(Page* page, DragClient* client) |
| { |
| return adoptPtr(new DragController(page, client)); |
| } |
| |
| static PassRefPtr<DocumentFragment> documentFragmentFromDragData(DragData* dragData, Frame* frame, RefPtr<Range> context, |
| bool allowPlainText, bool& chosePlainText) |
| { |
| ASSERT(dragData); |
| chosePlainText = false; |
| |
| Document* document = context->ownerDocument(); |
| ASSERT(document); |
| if (document && dragData->containsCompatibleContent()) { |
| if (PassRefPtr<DocumentFragment> fragment = dragData->asFragment(frame, context, allowPlainText, chosePlainText)) |
| return fragment; |
| |
| if (dragData->containsURL(frame, DragData::DoNotConvertFilenames)) { |
| String title; |
| String url = dragData->asURL(frame, DragData::DoNotConvertFilenames, &title); |
| if (!url.isEmpty()) { |
| RefPtr<HTMLAnchorElement> anchor = HTMLAnchorElement::create(document); |
| anchor->setHref(url); |
| if (title.isEmpty()) { |
| // Try the plain text first because the url might be normalized or escaped. |
| if (dragData->containsPlainText()) |
| title = dragData->asPlainText(frame); |
| if (title.isEmpty()) |
| title = url; |
| } |
| RefPtr<Node> anchorText = document->createTextNode(title); |
| ExceptionCode ec; |
| anchor->appendChild(anchorText, ec); |
| RefPtr<DocumentFragment> fragment = document->createDocumentFragment(); |
| fragment->appendChild(anchor, ec); |
| return fragment.get(); |
| } |
| } |
| } |
| if (allowPlainText && dragData->containsPlainText()) { |
| chosePlainText = true; |
| return createFragmentFromText(context.get(), dragData->asPlainText(frame)).get(); |
| } |
| |
| return 0; |
| } |
| |
| bool DragController::dragIsMove(FrameSelection* selection, DragData* dragData) |
| { |
| return m_documentUnderMouse == m_dragInitiator && selection->isContentEditable() && selection->isRange() && !isCopyKeyDown(dragData); |
| } |
| |
| // FIXME: This method is poorly named. We're just clearing the selection from the document this drag is exiting. |
| void DragController::cancelDrag() |
| { |
| m_page->dragCaretController()->clear(); |
| } |
| |
| void DragController::dragEnded() |
| { |
| m_dragInitiator = 0; |
| m_didInitiateDrag = false; |
| m_page->dragCaretController()->clear(); |
| |
| m_client->dragEnded(); |
| } |
| |
| DragSession DragController::dragEntered(DragData* dragData) |
| { |
| return dragEnteredOrUpdated(dragData); |
| } |
| |
| void DragController::dragExited(DragData* dragData) |
| { |
| ASSERT(dragData); |
| Frame* mainFrame = m_page->mainFrame(); |
| |
| if (RefPtr<FrameView> v = mainFrame->view()) { |
| ClipboardAccessPolicy policy = (!m_documentUnderMouse || m_documentUnderMouse->securityOrigin()->isLocal()) ? ClipboardReadable : ClipboardTypesReadable; |
| RefPtr<Clipboard> clipboard = Clipboard::create(policy, dragData, mainFrame); |
| clipboard->setSourceOperation(dragData->draggingSourceOperationMask()); |
| mainFrame->eventHandler()->cancelDragAndDrop(createMouseEvent(dragData), clipboard.get()); |
| clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard here for security |
| } |
| mouseMovedIntoDocument(0); |
| if (m_fileInputElementUnderMouse) |
| m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false); |
| m_fileInputElementUnderMouse = 0; |
| } |
| |
| DragSession DragController::dragUpdated(DragData* dragData) |
| { |
| return dragEnteredOrUpdated(dragData); |
| } |
| |
| bool DragController::performDrag(DragData* dragData) |
| { |
| ASSERT(dragData); |
| m_documentUnderMouse = m_page->mainFrame()->documentAtPoint(dragData->clientPosition()); |
| if ((m_dragDestinationAction & DragDestinationActionDHTML) && m_documentIsHandlingDrag) { |
| m_client->willPerformDragDestinationAction(DragDestinationActionDHTML, dragData); |
| RefPtr<Frame> mainFrame = m_page->mainFrame(); |
| bool preventedDefault = false; |
| if (mainFrame->view()) { |
| // Sending an event can result in the destruction of the view and part. |
| RefPtr<Clipboard> clipboard = Clipboard::create(ClipboardReadable, dragData, mainFrame.get()); |
| clipboard->setSourceOperation(dragData->draggingSourceOperationMask()); |
| preventedDefault = mainFrame->eventHandler()->performDragAndDrop(createMouseEvent(dragData), clipboard.get()); |
| clipboard->setAccessPolicy(ClipboardNumb); // Invalidate clipboard here for security |
| } |
| if (preventedDefault) { |
| m_documentUnderMouse = 0; |
| return true; |
| } |
| } |
| |
| if ((m_dragDestinationAction & DragDestinationActionEdit) && concludeEditDrag(dragData)) { |
| m_documentUnderMouse = 0; |
| return true; |
| } |
| |
| m_documentUnderMouse = 0; |
| |
| if (operationForLoad(dragData) == DragOperationNone) |
| return false; |
| |
| m_client->willPerformDragDestinationAction(DragDestinationActionLoad, dragData); |
| m_page->mainFrame()->loader()->load(ResourceRequest(dragData->asURL(m_page->mainFrame())), false); |
| return true; |
| } |
| |
| void DragController::mouseMovedIntoDocument(Document* newDocument) |
| { |
| if (m_documentUnderMouse == newDocument) |
| return; |
| |
| // If we were over another document clear the selection |
| if (m_documentUnderMouse) |
| cancelDrag(); |
| m_documentUnderMouse = newDocument; |
| } |
| |
| DragSession DragController::dragEnteredOrUpdated(DragData* dragData) |
| { |
| ASSERT(dragData); |
| ASSERT(m_page->mainFrame()); |
| mouseMovedIntoDocument(m_page->mainFrame()->documentAtPoint(dragData->clientPosition())); |
| |
| m_dragDestinationAction = m_client->actionMaskForDrag(dragData); |
| if (m_dragDestinationAction == DragDestinationActionNone) { |
| cancelDrag(); // FIXME: Why not call mouseMovedIntoDocument(0)? |
| return DragSession(); |
| } |
| |
| DragSession dragSession; |
| m_documentIsHandlingDrag = tryDocumentDrag(dragData, m_dragDestinationAction, dragSession); |
| if (!m_documentIsHandlingDrag && (m_dragDestinationAction & DragDestinationActionLoad)) |
| dragSession.operation = operationForLoad(dragData); |
| return dragSession; |
| } |
| |
| static HTMLInputElement* asFileInput(Node* node) |
| { |
| ASSERT(node); |
| |
| HTMLInputElement* inputElement = node->toInputElement(); |
| |
| // If this is a button inside of the a file input, move up to the file input. |
| if (inputElement && inputElement->isTextButton() && inputElement->treeScope()->rootNode()->isShadowRoot()) |
| inputElement = toShadowRoot(inputElement->treeScope()->rootNode())->host()->toInputElement(); |
| |
| return inputElement && inputElement->isFileUpload() ? inputElement : 0; |
| } |
| |
| // This can return null if an empty document is loaded. |
| static Element* elementUnderMouse(Document* documentUnderMouse, const IntPoint& p) |
| { |
| Frame* frame = documentUnderMouse->frame(); |
| float zoomFactor = frame ? frame->pageZoomFactor() : 1; |
| LayoutPoint point = roundedLayoutPoint(FloatPoint(p.x() * zoomFactor, p.y() * zoomFactor)); |
| |
| HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); |
| HitTestResult result(point); |
| documentUnderMouse->renderView()->hitTest(request, result); |
| |
| Node* n = result.innerNode(); |
| while (n && !n->isElementNode()) |
| n = n->parentNode(); |
| if (n) |
| n = n->shadowAncestorNode(); |
| |
| return static_cast<Element*>(n); |
| } |
| |
| bool DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask, DragSession& dragSession) |
| { |
| ASSERT(dragData); |
| |
| if (!m_documentUnderMouse) |
| return false; |
| |
| if (m_dragInitiator && !m_documentUnderMouse->securityOrigin()->canReceiveDragData(m_dragInitiator->securityOrigin())) |
| return false; |
| |
| bool isHandlingDrag = false; |
| if (actionMask & DragDestinationActionDHTML) { |
| isHandlingDrag = tryDHTMLDrag(dragData, dragSession.operation); |
| // Do not continue if m_documentUnderMouse has been reset by tryDHTMLDrag. |
| // tryDHTMLDrag fires dragenter event. The event listener that listens |
| // to this event may create a nested message loop (open a modal dialog), |
| // which could process dragleave event and reset m_documentUnderMouse in |
| // dragExited. |
| if (!m_documentUnderMouse) |
| return false; |
| } |
| |
| // It's unclear why this check is after tryDHTMLDrag. |
| // We send drag events in tryDHTMLDrag and that may be the reason. |
| RefPtr<FrameView> frameView = m_documentUnderMouse->view(); |
| if (!frameView) |
| return false; |
| |
| if (isHandlingDrag) { |
| m_page->dragCaretController()->clear(); |
| return true; |
| } |
| |
| if ((actionMask & DragDestinationActionEdit) && canProcessDrag(dragData)) { |
| if (dragData->containsColor()) { |
| dragSession.operation = DragOperationGeneric; |
| return true; |
| } |
| |
| IntPoint point = frameView->windowToContents(dragData->clientPosition()); |
| Element* element = elementUnderMouse(m_documentUnderMouse.get(), point); |
| if (!element) |
| return false; |
| |
| HTMLInputElement* elementAsFileInput = asFileInput(element); |
| if (m_fileInputElementUnderMouse != elementAsFileInput) { |
| if (m_fileInputElementUnderMouse) |
| m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false); |
| m_fileInputElementUnderMouse = elementAsFileInput; |
| } |
| |
| if (!m_fileInputElementUnderMouse) |
| m_page->dragCaretController()->setCaretPosition(m_documentUnderMouse->frame()->visiblePositionForPoint(point)); |
| |
| Frame* innerFrame = element->document()->frame(); |
| dragSession.operation = dragIsMove(innerFrame->selection(), dragData) ? DragOperationMove : DragOperationCopy; |
| dragSession.mouseIsOverFileInput = m_fileInputElementUnderMouse; |
| dragSession.numberOfItemsToBeAccepted = 0; |
| |
| unsigned numberOfFiles = dragData->numberOfFiles(); |
| if (m_fileInputElementUnderMouse) { |
| if (m_fileInputElementUnderMouse->disabled()) |
| dragSession.numberOfItemsToBeAccepted = 0; |
| else if (m_fileInputElementUnderMouse->multiple()) |
| dragSession.numberOfItemsToBeAccepted = numberOfFiles; |
| else if (numberOfFiles > 1) |
| dragSession.numberOfItemsToBeAccepted = 0; |
| else |
| dragSession.numberOfItemsToBeAccepted = 1; |
| |
| if (!dragSession.numberOfItemsToBeAccepted) |
| dragSession.operation = DragOperationNone; |
| m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(dragSession.numberOfItemsToBeAccepted); |
| } else { |
| // We are not over a file input element. The dragged item(s) will only |
| // be loaded into the view the number of dragged items is 1. |
| dragSession.numberOfItemsToBeAccepted = numberOfFiles != 1 ? 0 : 1; |
| } |
| |
| return true; |
| } |
| |
| // We are not over an editable region. Make sure we're clearing any prior drag cursor. |
| m_page->dragCaretController()->clear(); |
| if (m_fileInputElementUnderMouse) |
| m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false); |
| m_fileInputElementUnderMouse = 0; |
| return false; |
| } |
| |
| DragSourceAction DragController::delegateDragSourceAction(const IntPoint& rootViewPoint) |
| { |
| m_dragSourceAction = m_client->dragSourceActionMaskForPoint(rootViewPoint); |
| return m_dragSourceAction; |
| } |
| |
| DragOperation DragController::operationForLoad(DragData* dragData) |
| { |
| ASSERT(dragData); |
| Document* doc = m_page->mainFrame()->documentAtPoint(dragData->clientPosition()); |
| if (doc && (m_didInitiateDrag || doc->isPluginDocument() || doc->rendererIsEditable())) |
| return DragOperationNone; |
| return dragOperation(dragData); |
| } |
| |
| static bool setSelectionToDragCaret(Frame* frame, VisibleSelection& dragCaret, RefPtr<Range>& range, const IntPoint& point) |
| { |
| frame->selection()->setSelection(dragCaret); |
| if (frame->selection()->isNone()) { |
| dragCaret = frame->visiblePositionForPoint(point); |
| frame->selection()->setSelection(dragCaret); |
| range = dragCaret.toNormalizedRange(); |
| } |
| return !frame->selection()->isNone() && frame->selection()->isContentEditable(); |
| } |
| |
| bool DragController::dispatchTextInputEventFor(Frame* innerFrame, DragData* dragData) |
| { |
| ASSERT(m_page->dragCaretController()->hasCaret()); |
| String text = m_page->dragCaretController()->isContentRichlyEditable() ? "" : dragData->asPlainText(innerFrame); |
| Node* target = innerFrame->editor()->findEventTargetFrom(m_page->dragCaretController()->caretPosition()); |
| ExceptionCode ec = 0; |
| return target->dispatchEvent(TextEvent::createForDrop(innerFrame->document()->domWindow(), text), ec); |
| } |
| |
| bool DragController::concludeEditDrag(DragData* dragData) |
| { |
| ASSERT(dragData); |
| |
| RefPtr<HTMLInputElement> fileInput = m_fileInputElementUnderMouse; |
| if (m_fileInputElementUnderMouse) { |
| m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false); |
| m_fileInputElementUnderMouse = 0; |
| } |
| |
| if (!m_documentUnderMouse) |
| return false; |
| |
| IntPoint point = m_documentUnderMouse->view()->windowToContents(dragData->clientPosition()); |
| Element* element = elementUnderMouse(m_documentUnderMouse.get(), point); |
| if (!element) |
| return false; |
| RefPtr<Frame> innerFrame = element->ownerDocument()->frame(); |
| ASSERT(innerFrame); |
| |
| if (m_page->dragCaretController()->hasCaret() && !dispatchTextInputEventFor(innerFrame.get(), dragData)) |
| return true; |
| |
| if (dragData->containsColor()) { |
| Color color = dragData->asColor(); |
| if (!color.isValid()) |
| return false; |
| RefPtr<Range> innerRange = innerFrame->selection()->toNormalizedRange(); |
| RefPtr<StylePropertySet> style = StylePropertySet::create(); |
| style->setProperty(CSSPropertyColor, color.serialized(), false); |
| if (!innerFrame->editor()->shouldApplyStyle(style.get(), innerRange.get())) |
| return false; |
| m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData); |
| innerFrame->editor()->applyStyle(style.get(), EditActionSetColor); |
| return true; |
| } |
| |
| if (dragData->containsFiles() && fileInput) { |
| // fileInput should be the element we hit tested for, unless it was made |
| // display:none in a drop event handler. |
| ASSERT(fileInput == element || !fileInput->renderer()); |
| if (fileInput->disabled()) |
| return false; |
| |
| return fileInput->receiveDroppedFiles(dragData); |
| } |
| |
| if (!m_page->dragController()->canProcessDrag(dragData)) { |
| m_page->dragCaretController()->clear(); |
| return false; |
| } |
| |
| VisibleSelection dragCaret = m_page->dragCaretController()->caretPosition(); |
| m_page->dragCaretController()->clear(); |
| RefPtr<Range> range = dragCaret.toNormalizedRange(); |
| RefPtr<Element> rootEditableElement = innerFrame->selection()->rootEditableElement(); |
| |
| // For range to be null a WebKit client must have done something bad while |
| // manually controlling drag behaviour |
| if (!range) |
| return false; |
| CachedResourceLoader* cachedResourceLoader = range->ownerDocument()->cachedResourceLoader(); |
| ResourceCacheValidationSuppressor validationSuppressor(cachedResourceLoader); |
| if (dragIsMove(innerFrame->selection(), dragData) || dragCaret.isContentRichlyEditable()) { |
| bool chosePlainText = false; |
| RefPtr<DocumentFragment> fragment = documentFragmentFromDragData(dragData, innerFrame.get(), range, true, chosePlainText); |
| if (!fragment || !innerFrame->editor()->shouldInsertFragment(fragment, range, EditorInsertActionDropped)) { |
| return false; |
| } |
| |
| m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData); |
| if (dragIsMove(innerFrame->selection(), dragData)) { |
| // NSTextView behavior is to always smart delete on moving a selection, |
| // but only to smart insert if the selection granularity is word granularity. |
| bool smartDelete = innerFrame->editor()->smartInsertDeleteEnabled(); |
| bool smartInsert = smartDelete && innerFrame->selection()->granularity() == WordGranularity && dragData->canSmartReplace(); |
| applyCommand(MoveSelectionCommand::create(fragment, dragCaret.base(), smartInsert, smartDelete)); |
| } else { |
| if (setSelectionToDragCaret(innerFrame.get(), dragCaret, range, point)) { |
| ReplaceSelectionCommand::CommandOptions options = ReplaceSelectionCommand::SelectReplacement | ReplaceSelectionCommand::PreventNesting; |
| if (dragData->canSmartReplace()) |
| options |= ReplaceSelectionCommand::SmartReplace; |
| if (chosePlainText) |
| options |= ReplaceSelectionCommand::MatchStyle; |
| applyCommand(ReplaceSelectionCommand::create(m_documentUnderMouse.get(), fragment, options)); |
| } |
| } |
| } else { |
| String text = dragData->asPlainText(innerFrame.get()); |
| if (text.isEmpty() || !innerFrame->editor()->shouldInsertText(text, range.get(), EditorInsertActionDropped)) { |
| return false; |
| } |
| |
| m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData); |
| if (setSelectionToDragCaret(innerFrame.get(), dragCaret, range, point)) |
| applyCommand(ReplaceSelectionCommand::create(m_documentUnderMouse.get(), createFragmentFromText(range.get(), text), ReplaceSelectionCommand::SelectReplacement | ReplaceSelectionCommand::MatchStyle | ReplaceSelectionCommand::PreventNesting)); |
| } |
| |
| if (rootEditableElement) { |
| if (Frame* frame = rootEditableElement->document()->frame()) |
| frame->eventHandler()->updateDragStateAfterEditDragIfNeeded(rootEditableElement.get()); |
| } |
| |
| return true; |
| } |
| |
| bool DragController::canProcessDrag(DragData* dragData) |
| { |
| ASSERT(dragData); |
| |
| if (!dragData->containsCompatibleContent()) |
| return false; |
| |
| IntPoint point = m_page->mainFrame()->view()->windowToContents(dragData->clientPosition()); |
| HitTestResult result = HitTestResult(point); |
| if (!m_page->mainFrame()->contentRenderer()) |
| return false; |
| |
| result = m_page->mainFrame()->eventHandler()->hitTestResultAtPoint(point, true); |
| |
| if (!result.innerNonSharedNode()) |
| return false; |
| |
| if (dragData->containsFiles() && asFileInput(result.innerNonSharedNode())) |
| return true; |
| |
| if (result.innerNonSharedNode()->isPluginElement()) { |
| HTMLPlugInElement* plugin = static_cast<HTMLPlugInElement*>(result.innerNonSharedNode()); |
| if (!plugin->canProcessDrag() && !result.innerNonSharedNode()->rendererIsEditable()) |
| return false; |
| } else if (!result.innerNonSharedNode()->rendererIsEditable()) |
| return false; |
| |
| if (m_didInitiateDrag && m_documentUnderMouse == m_dragInitiator && result.isSelected()) |
| return false; |
| |
| return true; |
| } |
| |
| static DragOperation defaultOperationForDrag(DragOperation srcOpMask) |
| { |
| // This is designed to match IE's operation fallback for the case where |
| // the page calls preventDefault() in a drag event but doesn't set dropEffect. |
| if (srcOpMask == DragOperationEvery) |
| return DragOperationCopy; |
| if (srcOpMask == DragOperationNone) |
| return DragOperationNone; |
| if (srcOpMask & DragOperationMove || srcOpMask & DragOperationGeneric) |
| return DragOperationMove; |
| if (srcOpMask & DragOperationCopy) |
| return DragOperationCopy; |
| if (srcOpMask & DragOperationLink) |
| return DragOperationLink; |
| |
| // FIXME: Does IE really return "generic" even if no operations were allowed by the source? |
| return DragOperationGeneric; |
| } |
| |
| bool DragController::tryDHTMLDrag(DragData* dragData, DragOperation& operation) |
| { |
| ASSERT(dragData); |
| ASSERT(m_documentUnderMouse); |
| RefPtr<Frame> mainFrame = m_page->mainFrame(); |
| RefPtr<FrameView> viewProtector = mainFrame->view(); |
| if (!viewProtector) |
| return false; |
| |
| ClipboardAccessPolicy policy = m_documentUnderMouse->securityOrigin()->isLocal() ? ClipboardReadable : ClipboardTypesReadable; |
| RefPtr<Clipboard> clipboard = Clipboard::create(policy, dragData, mainFrame.get()); |
| DragOperation srcOpMask = dragData->draggingSourceOperationMask(); |
| clipboard->setSourceOperation(srcOpMask); |
| |
| PlatformMouseEvent event = createMouseEvent(dragData); |
| if (!mainFrame->eventHandler()->updateDragAndDrop(event, clipboard.get())) { |
| clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard here for security |
| return false; |
| } |
| |
| operation = clipboard->destinationOperation(); |
| if (clipboard->dropEffectIsUninitialized()) |
| operation = defaultOperationForDrag(srcOpMask); |
| else if (!(srcOpMask & operation)) { |
| // The element picked an operation which is not supported by the source |
| operation = DragOperationNone; |
| } |
| |
| clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard here for security |
| return true; |
| } |
| |
| Node* DragController::draggableNode(const Frame* src, Node* startNode, const IntPoint& dragOrigin, DragState& state) const |
| { |
| state.m_dragType = (src->selection()->contains(dragOrigin)) ? DragSourceActionSelection : DragSourceActionNone; |
| |
| for (const RenderObject* renderer = startNode->renderer(); renderer; renderer = renderer->parent()) { |
| Node* node = renderer->node(); |
| if (!node) |
| // Anonymous render blocks don't correspond to actual DOM nodes, so we skip over them |
| // for the purposes of finding a draggable node. |
| continue; |
| if (!(state.m_dragType & DragSourceActionSelection) && node->isTextNode() && node->canStartSelection()) |
| // In this case we have a click in the unselected portion of text. If this text is |
| // selectable, we want to start the selection process instead of looking for a parent |
| // to try to drag. |
| return 0; |
| if (node->isElementNode()) { |
| EUserDrag dragMode = renderer->style()->userDrag(); |
| if ((m_dragSourceAction & DragSourceActionDHTML) && dragMode == DRAG_ELEMENT) { |
| state.m_dragType = static_cast<DragSourceAction>(state.m_dragType | DragSourceActionDHTML); |
| return node; |
| } |
| if (dragMode == DRAG_AUTO) { |
| if ((m_dragSourceAction & DragSourceActionImage) |
| && node->hasTagName(HTMLNames::imgTag) |
| && src->settings() |
| && src->settings()->loadsImagesAutomatically()) { |
| state.m_dragType = static_cast<DragSourceAction>(state.m_dragType | DragSourceActionImage); |
| return node; |
| } |
| if ((m_dragSourceAction & DragSourceActionLink) |
| && node->hasTagName(HTMLNames::aTag) |
| && static_cast<HTMLAnchorElement*>(node)->isLiveLink()) { |
| state.m_dragType = static_cast<DragSourceAction>(state.m_dragType | DragSourceActionLink); |
| return node; |
| } |
| } |
| } |
| } |
| |
| // We either have nothing to drag or we have a selection and we're not over a draggable element. |
| return (state.m_dragType & DragSourceActionSelection) ? startNode : 0; |
| } |
| |
| static CachedImage* getCachedImage(Element* element) |
| { |
| ASSERT(element); |
| RenderObject* renderer = element->renderer(); |
| if (!renderer || !renderer->isImage()) |
| return 0; |
| RenderImage* image = toRenderImage(renderer); |
| return image->cachedImage(); |
| } |
| |
| static Image* getImage(Element* element) |
| { |
| ASSERT(element); |
| CachedImage* cachedImage = getCachedImage(element); |
| // Don't use cachedImage->imageForRenderer() here as that may return BitmapImages for cached SVG Images. |
| // Users of getImage() want access to the SVGImage, in order to figure out the filename extensions, |
| // which would be empty when asking the cached BitmapImages. |
| return (cachedImage && !cachedImage->errorOccurred()) ? |
| cachedImage->image() : 0; |
| } |
| |
| static void prepareClipboardForImageDrag(Frame* source, Clipboard* clipboard, Element* node, const KURL& linkURL, const KURL& imageURL, const String& label) |
| { |
| if (node->isContentRichlyEditable()) { |
| RefPtr<Range> range = source->document()->createRange(); |
| ExceptionCode ec = 0; |
| range->selectNode(node, ec); |
| ASSERT(!ec); |
| source->selection()->setSelection(VisibleSelection(range.get(), DOWNSTREAM)); |
| } |
| clipboard->declareAndWriteDragImage(node, !linkURL.isEmpty() ? linkURL : imageURL, label, source); |
| } |
| |
| static IntPoint dragLocForDHTMLDrag(const IntPoint& mouseDraggedPoint, const IntPoint& dragOrigin, const IntPoint& dragImageOffset, bool isLinkImage) |
| { |
| // dragImageOffset is the cursor position relative to the lower-left corner of the image. |
| #if PLATFORM(MAC) |
| // We add in the Y dimension because we are a flipped view, so adding moves the image down. |
| const int yOffset = dragImageOffset.y(); |
| #else |
| const int yOffset = -dragImageOffset.y(); |
| #endif |
| |
| if (isLinkImage) |
| return IntPoint(mouseDraggedPoint.x() - dragImageOffset.x(), mouseDraggedPoint.y() + yOffset); |
| |
| return IntPoint(dragOrigin.x() - dragImageOffset.x(), dragOrigin.y() + yOffset); |
| } |
| |
| static IntPoint dragLocForSelectionDrag(Frame* src) |
| { |
| IntRect draggingRect = enclosingIntRect(src->selection()->bounds()); |
| int xpos = draggingRect.maxX(); |
| xpos = draggingRect.x() < xpos ? draggingRect.x() : xpos; |
| int ypos = draggingRect.maxY(); |
| #if PLATFORM(MAC) |
| // Deal with flipped coordinates on Mac |
| ypos = draggingRect.y() > ypos ? draggingRect.y() : ypos; |
| #else |
| ypos = draggingRect.y() < ypos ? draggingRect.y() : ypos; |
| #endif |
| return IntPoint(xpos, ypos); |
| } |
| |
| bool DragController::startDrag(Frame* src, const DragState& state, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin) |
| { |
| ASSERT(src); |
| |
| if (!src->view() || !src->contentRenderer()) |
| return false; |
| |
| HitTestResult hitTestResult = src->eventHandler()->hitTestResultAtPoint(dragOrigin, true); |
| if (!state.m_dragSrc->contains(hitTestResult.innerNode())) |
| // The original node being dragged isn't under the drag origin anymore... maybe it was |
| // hidden or moved out from under the cursor. Regardless, we don't want to start a drag on |
| // something that's not actually under the drag origin. |
| return false; |
| KURL linkURL = hitTestResult.absoluteLinkURL(); |
| KURL imageURL = hitTestResult.absoluteImageURL(); |
| |
| IntPoint mouseDraggedPoint = src->view()->windowToContents(dragEvent.position()); |
| |
| m_draggingImageURL = KURL(); |
| m_sourceDragOperation = srcOp; |
| |
| DragImageRef dragImage = 0; |
| IntPoint dragLoc(0, 0); |
| IntPoint dragImageOffset(0, 0); |
| |
| Clipboard* clipboard = state.m_dragClipboard.get(); |
| if (state.m_dragType == DragSourceActionDHTML) |
| dragImage = clipboard->createDragImage(dragImageOffset); |
| if (state.m_dragType == DragSourceActionSelection || !imageURL.isEmpty() || !linkURL.isEmpty()) |
| // Selection, image, and link drags receive a default set of allowed drag operations that |
| // follows from: |
| // http://trac.webkit.org/browser/trunk/WebKit/mac/WebView/WebHTMLView.mm?rev=48526#L3430 |
| m_sourceDragOperation = static_cast<DragOperation>(m_sourceDragOperation | DragOperationGeneric | DragOperationCopy); |
| |
| // We allow DHTML/JS to set the drag image, even if its a link, image or text we're dragging. |
| // This is in the spirit of the IE API, which allows overriding of pasteboard data and DragOp. |
| if (dragImage) { |
| dragLoc = dragLocForDHTMLDrag(mouseDraggedPoint, dragOrigin, dragImageOffset, !linkURL.isEmpty()); |
| m_dragOffset = dragImageOffset; |
| } |
| |
| bool startedDrag = true; // optimism - we almost always manage to start the drag |
| |
| Node* node = state.m_dragSrc.get(); |
| |
| Image* image = getImage(static_cast<Element*>(node)); |
| if (state.m_dragType == DragSourceActionSelection) { |
| if (!clipboard->hasData()) { |
| if (enclosingTextFormControl(src->selection()->start())) |
| clipboard->writePlainText(src->editor()->selectedText()); |
| else { |
| RefPtr<Range> selectionRange = src->selection()->toNormalizedRange(); |
| ASSERT(selectionRange); |
| |
| clipboard->writeRange(selectionRange.get(), src); |
| } |
| } |
| m_client->willPerformDragSourceAction(DragSourceActionSelection, dragOrigin, clipboard); |
| if (!dragImage) { |
| dragImage = createDragImageForSelection(src); |
| dragLoc = dragLocForSelectionDrag(src); |
| m_dragOffset = IntPoint(dragOrigin.x() - dragLoc.x(), dragOrigin.y() - dragLoc.y()); |
| } |
| doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false); |
| } else if (!imageURL.isEmpty() && node && node->isElementNode() && image && !image->isNull() |
| && (m_dragSourceAction & DragSourceActionImage)) { |
| // We shouldn't be starting a drag for an image that can't provide an extension. |
| // This is an early detection for problems encountered later upon drop. |
| ASSERT(!image->filenameExtension().isEmpty()); |
| Element* element = static_cast<Element*>(node); |
| if (!clipboard->hasData()) { |
| m_draggingImageURL = imageURL; |
| prepareClipboardForImageDrag(src, clipboard, element, linkURL, imageURL, hitTestResult.altDisplayString()); |
| } |
| |
| m_client->willPerformDragSourceAction(DragSourceActionImage, dragOrigin, clipboard); |
| |
| if (!dragImage) { |
| IntRect imageRect = hitTestResult.imageRect(); |
| imageRect.setLocation(m_page->mainFrame()->view()->rootViewToContents(src->view()->contentsToRootView(imageRect.location()))); |
| doImageDrag(element, dragOrigin, hitTestResult.imageRect(), clipboard, src, m_dragOffset); |
| } else |
| // DHTML defined drag image |
| doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false); |
| |
| } else if (!linkURL.isEmpty() && (m_dragSourceAction & DragSourceActionLink)) { |
| if (!clipboard->hasData()) |
| // Simplify whitespace so the title put on the clipboard resembles what the user sees |
| // on the web page. This includes replacing newlines with spaces. |
| clipboard->writeURL(linkURL, hitTestResult.textContent().simplifyWhiteSpace(), src); |
| |
| if (src->selection()->isCaret() && src->selection()->isContentEditable()) { |
| // a user can initiate a drag on a link without having any text |
| // selected. In this case, we should expand the selection to |
| // the enclosing anchor element |
| Position pos = src->selection()->base(); |
| Node* node = enclosingAnchorElement(pos); |
| if (node) |
| src->selection()->setSelection(VisibleSelection::selectionFromContentsOfNode(node)); |
| } |
| |
| m_client->willPerformDragSourceAction(DragSourceActionLink, dragOrigin, clipboard); |
| if (!dragImage) { |
| dragImage = createDragImageForLink(linkURL, hitTestResult.textContent(), src); |
| IntSize size = dragImageSize(dragImage); |
| m_dragOffset = IntPoint(-size.width() / 2, -LinkDragBorderInset); |
| dragLoc = IntPoint(mouseDraggedPoint.x() + m_dragOffset.x(), mouseDraggedPoint.y() + m_dragOffset.y()); |
| } |
| doSystemDrag(dragImage, dragLoc, mouseDraggedPoint, clipboard, src, true); |
| } else if (state.m_dragType == DragSourceActionDHTML) { |
| ASSERT(m_dragSourceAction & DragSourceActionDHTML); |
| m_client->willPerformDragSourceAction(DragSourceActionDHTML, dragOrigin, clipboard); |
| doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false); |
| } else { |
| // draggableNode() determined an image or link node was draggable, but it turns out the |
| // image or link had no URL, so there is nothing to drag. |
| startedDrag = false; |
| } |
| |
| if (dragImage) |
| deleteDragImage(dragImage); |
| return startedDrag; |
| } |
| |
| void DragController::doImageDrag(Element* element, const IntPoint& dragOrigin, const IntRect& rect, Clipboard* clipboard, Frame* frame, IntPoint& dragImageOffset) |
| { |
| IntPoint mouseDownPoint = dragOrigin; |
| DragImageRef dragImage; |
| IntPoint origin; |
| |
| Image* image = getImage(element); |
| if (image && image->size().height() * image->size().width() <= MaxOriginalImageArea |
| && (dragImage = createDragImageFromImage(image, element->renderer() ? element->renderer()->shouldRespectImageOrientation() : DoNotRespectImageOrientation))) { |
| IntSize originalSize = rect.size(); |
| origin = rect.location(); |
| |
| dragImage = fitDragImageToMaxSize(dragImage, rect.size(), maxDragImageSize()); |
| dragImage = dissolveDragImageToFraction(dragImage, DragImageAlpha); |
| IntSize newSize = dragImageSize(dragImage); |
| |
| // Properly orient the drag image and orient it differently if it's smaller than the original |
| float scale = newSize.width() / (float)originalSize.width(); |
| float dx = origin.x() - mouseDownPoint.x(); |
| dx *= scale; |
| origin.setX((int)(dx + 0.5)); |
| #if PLATFORM(MAC) |
| //Compensate for accursed flipped coordinates in cocoa |
| origin.setY(origin.y() + originalSize.height()); |
| #endif |
| float dy = origin.y() - mouseDownPoint.y(); |
| dy *= scale; |
| origin.setY((int)(dy + 0.5)); |
| } else { |
| dragImage = createDragImageIconForCachedImage(getCachedImage(element)); |
| if (dragImage) |
| origin = IntPoint(DragIconRightInset - dragImageSize(dragImage).width(), DragIconBottomInset); |
| } |
| |
| dragImageOffset = mouseDownPoint + origin; |
| doSystemDrag(dragImage, dragImageOffset, dragOrigin, clipboard, frame, false); |
| |
| deleteDragImage(dragImage); |
| } |
| |
| void DragController::doSystemDrag(DragImageRef image, const IntPoint& dragLoc, const IntPoint& eventPos, Clipboard* clipboard, Frame* frame, bool forLink) |
| { |
| m_didInitiateDrag = true; |
| m_dragInitiator = frame->document(); |
| // Protect this frame and view, as a load may occur mid drag and attempt to unload this frame |
| RefPtr<Frame> frameProtector = m_page->mainFrame(); |
| RefPtr<FrameView> viewProtector = frameProtector->view(); |
| m_client->startDrag(image, viewProtector->rootViewToContents(frame->view()->contentsToRootView(dragLoc)), |
| viewProtector->rootViewToContents(frame->view()->contentsToRootView(eventPos)), clipboard, frameProtector.get(), forLink); |
| // DragClient::startDrag can cause our Page to dispear, deallocating |this|. |
| if (!frameProtector->page()) |
| return; |
| |
| cleanupAfterSystemDrag(); |
| } |
| |
| // Manual drag caret manipulation |
| void DragController::placeDragCaret(const IntPoint& windowPoint) |
| { |
| mouseMovedIntoDocument(m_page->mainFrame()->documentAtPoint(windowPoint)); |
| if (!m_documentUnderMouse) |
| return; |
| Frame* frame = m_documentUnderMouse->frame(); |
| FrameView* frameView = frame->view(); |
| if (!frameView) |
| return; |
| IntPoint framePoint = frameView->windowToContents(windowPoint); |
| |
| m_page->dragCaretController()->setCaretPosition(frame->visiblePositionForPoint(framePoint)); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(DRAG_SUPPORT) |
