bool DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask, DragOperation& operation)
{
ASSERT(dragData);
if (!m_documentUnderMouse)
return false;
m_isHandlingDrag = false;
if (actionMask & DragDestinationActionDHTML) {
m_isHandlingDrag = tryDHTMLDrag(dragData, 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 (m_isHandlingDrag) {
m_page->dragCaretController()->clear();
return true;
} else if ((actionMask & DragDestinationActionEdit) && canProcessDrag(dragData)) {
if (dragData->containsColor()) {
operation = DragOperationGeneric;
return true;
}
IntPoint point = frameView->windowToContents(dragData->clientPosition());
Element* element = elementUnderMouse(m_documentUnderMouse, point);
if (!asFileInput(element)) {
VisibleSelection dragCaret = m_documentUnderMouse->frame()->visiblePositionForPoint(point);
m_page->dragCaretController()->setSelection(dragCaret);
}
Frame* innerFrame = element->document()->frame();
operation = dragIsMove(innerFrame->selection()) ? DragOperationMove : DragOperationCopy;
return true;
}
// If we're not over an editable region, make sure we're clearing any prior drag cursor.
m_page->dragCaretController()->clear();
return false;
}
DragOperation DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask)
{
ASSERT(dragData);
if (!m_document)
return DragOperationNone;
DragOperation operation = DragOperationNone;
if (actionMask & DragDestinationActionDHTML)
operation = tryDHTMLDrag(dragData);
m_isHandlingDrag = operation != DragOperationNone;
RefPtr<FrameView> frameView = m_document->view();
if (!frameView)
return operation;
if ((actionMask & DragDestinationActionEdit) && !m_isHandlingDrag && canProcessDrag(dragData)) {
if (dragData->containsColor())
return DragOperationGeneric;
IntPoint dragPos = dragData->clientPosition();
IntPoint point = frameView->windowToContents(dragPos);
Element* element = m_document->elementFromPoint(point.x(), point.y());
ASSERT(element);
Frame* innerFrame = element->document()->frame();
ASSERT(innerFrame);
if (!asFileInput(element)) {
Selection dragCaret;
if (Frame* frame = m_document->frame())
dragCaret = frame->visiblePositionForPoint(point);
m_page->dragCaretController()->setSelection(dragCaret);
}
return dragIsMove(innerFrame->selection()) ? DragOperationMove : DragOperationCopy;
}
m_page->dragCaretController()->clear();
return operation;
}
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;
Frame* innerFrame = element->ownerDocument()->frame();
ASSERT(innerFrame);
if (m_page->dragCaretController()->hasCaret() && !dispatchTextInputEventFor(innerFrame, 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;
Vector<String> filenames;
dragData->asFilenames(filenames);
if (filenames.isEmpty())
return false;
fileInput->receiveDroppedFiles(filenames);
m_client->willPerformDragDestinationAction(DragDestinationActionUpload, dragData);
return true;
}
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, 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, 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);
if (text.isEmpty() || !innerFrame->editor()->shouldInsertText(text, range.get(), EditorInsertActionDropped)) {
return false;
}
m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);
if (setSelectionToDragCaret(innerFrame, 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::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;
m_isHandlingDrag = false;
if (actionMask & DragDestinationActionDHTML) {
m_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 (m_isHandlingDrag) {
m_page->dragCaretController()->clear();
return true;
} else 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;
}
bool DragController::concludeEditDrag(DragData* dragData)
{
ASSERT(dragData);
ASSERT(!m_isHandlingDrag);
if (!m_documentUnderMouse)
return false;
IntPoint point = m_documentUnderMouse->view()->windowToContents(dragData->clientPosition());
Element* element = elementUnderMouse(m_documentUnderMouse, point);
Frame* innerFrame = element->ownerDocument()->frame();
ASSERT(innerFrame);
if (dragData->containsColor()) {
Color color = dragData->asColor();
if (!color.isValid())
return false;
if (!innerFrame)
return false;
RefPtr<Range> innerRange = innerFrame->selection()->toNormalizedRange();
RefPtr<CSSStyleDeclaration> style = m_documentUnderMouse->createCSSStyleDeclaration();
ExceptionCode ec;
style->setProperty("color", color.name(), ec);
if (!innerFrame->editor()->shouldApplyStyle(style.get(), innerRange.get()))
return false;
m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);
innerFrame->editor()->applyStyle(style.get(), EditActionSetColor);
return true;
}
if (!m_page->dragController()->canProcessDrag(dragData)) {
m_page->dragCaretController()->clear();
return false;
}
if (HTMLInputElement* fileInput = asFileInput(element)) {
if (!fileInput->isEnabledFormControl())
return false;
if (!dragData->containsFiles())
return false;
Vector<String> filenames;
dragData->asFilenames(filenames);
if (filenames.isEmpty())
return false;
// Ugly. For security none of the APIs available to us can set the input value
// on file inputs. Even forcing a change in HTMLInputElement doesn't work as
// RenderFileUploadControl clears the file when doing updateFromElement().
RenderFileUploadControl* renderer = toRenderFileUploadControl(fileInput->renderer());
if (!renderer)
return false;
renderer->receiveDroppedFiles(filenames);
return true;
}
VisibleSelection dragCaret(m_page->dragCaretController()->selection());
m_page->dragCaretController()->clear();
RefPtr<Range> range = dragCaret.toNormalizedRange();
// For range to be null a WebKit client must have done something bad while
// manually controlling drag behaviour
if (!range)
return false;
DocLoader* loader = range->ownerDocument()->docLoader();
loader->setAllowStaleResources(true);
if (dragIsMove(innerFrame->selection()) || dragCaret.isContentRichlyEditable()) {
bool chosePlainText = false;
RefPtr<DocumentFragment> fragment = documentFragmentFromDragData(dragData, range, true, chosePlainText);
if (!fragment || !innerFrame->editor()->shouldInsertFragment(fragment, range, EditorInsertActionDropped)) {
loader->setAllowStaleResources(false);
return false;
}
m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);
if (dragIsMove(innerFrame->selection())) {
bool smartMove = innerFrame->selectionGranularity() == WordGranularity
&& innerFrame->editor()->smartInsertDeleteEnabled()
&& dragData->canSmartReplace();
applyCommand(MoveSelectionCommand::create(fragment, dragCaret.base(), smartMove));
} else {
if (setSelectionToDragCaret(innerFrame, dragCaret, range, point))
applyCommand(ReplaceSelectionCommand::create(m_documentUnderMouse, fragment, true, dragData->canSmartReplace(), chosePlainText));
}
} else {
String text = dragData->asPlainText();
if (text.isEmpty() || !innerFrame->editor()->shouldInsertText(text, range.get(), EditorInsertActionDropped)) {
loader->setAllowStaleResources(false);
return false;
}
m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);
if (setSelectionToDragCaret(innerFrame, dragCaret, range, point))
applyCommand(ReplaceSelectionCommand::create(m_documentUnderMouse, createFragmentFromText(range.get(), text), true, false, true));
}
loader->setAllowStaleResources(false);
return true;
}