~ubuntu-branches/ubuntu/raring/qtwebkit-source/raring-proposed

ClipboardAccessPolicy policy = (!m_documentUnderMouse || m_documentUnderMouse->securityOrigin()->isLocal()) ? ClipboardReadable : ClipboardTypesReadable;

193

RefPtr<Clipboard> clipboard = Clipboard::create(policy, dragData, mainFrame);

194

clipboard->setSourceOperation(dragData->draggingSourceOperationMask());

195

mainFrame->eventHandler()->cancelDragAndDrop(createMouseEvent(dragData), clipboard.get());

196

clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard here for security

197

}

198

mouseMovedIntoDocument(0);

199

if (m_fileInputElementUnderMouse)

200

m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);

201

m_fileInputElementUnderMouse = 0;

202

}

203

204

DragSession DragController::dragUpdated(DragData* dragData)

205

{

206

return dragEnteredOrUpdated(dragData);

207

}

208

209

bool DragController::performDrag(DragData* dragData)

210

{

211

ASSERT(dragData);

212

m_documentUnderMouse = m_page->mainFrame()->documentAtPoint(dragData->clientPosition());

213

if ((m_dragDestinationAction & DragDestinationActionDHTML) && m_documentIsHandlingDrag) {

214

m_client->willPerformDragDestinationAction(DragDestinationActionDHTML, dragData);

215

RefPtr<Frame> mainFrame = m_page->mainFrame();

216

bool preventedDefault = false;

217

if (mainFrame->view()) {

218

// Sending an event can result in the destruction of the view and part.

219

RefPtr<Clipboard> clipboard = Clipboard::create(ClipboardReadable, dragData, mainFrame.get());

220

clipboard->setSourceOperation(dragData->draggingSourceOperationMask());

221

preventedDefault = mainFrame->eventHandler()->performDragAndDrop(createMouseEvent(dragData), clipboard.get());

222

clipboard->setAccessPolicy(ClipboardNumb); // Invalidate clipboard here for security

223

}

224

if (preventedDefault) {

225

m_documentUnderMouse = 0;

226

return true;

227

}

228

}

229

230

if ((m_dragDestinationAction & DragDestinationActionEdit) && concludeEditDrag(dragData)) {

231

m_documentUnderMouse = 0;

232

return true;

233

}

234

235

m_documentUnderMouse = 0;

236

237

if (operationForLoad(dragData) == DragOperationNone)

238

return false;

239

240

m_client->willPerformDragDestinationAction(DragDestinationActionLoad, dragData);

241

m_page->mainFrame()->loader()->load(FrameLoadRequest(m_page->mainFrame(), ResourceRequest(dragData->asURL(m_page->mainFrame()))));

242

return true;

243

}

244

245

void DragController::mouseMovedIntoDocument(Document* newDocument)

246

{

247

if (m_documentUnderMouse == newDocument)

248

return;

249

250

// If we were over another document clear the selection

251

if (m_documentUnderMouse)

252

cancelDrag();

253

m_documentUnderMouse = newDocument;

254

}

255

256

DragSession DragController::dragEnteredOrUpdated(DragData* dragData)

257

{

258

ASSERT(dragData);

259

ASSERT(m_page->mainFrame());

260

mouseMovedIntoDocument(m_page->mainFrame()->documentAtPoint(dragData->clientPosition()));

261

262

m_dragDestinationAction = m_client->actionMaskForDrag(dragData);

263

if (m_dragDestinationAction == DragDestinationActionNone) {

264

cancelDrag(); // FIXME: Why not call mouseMovedIntoDocument(0)?

265

return DragSession();

266

}

267

268

DragSession dragSession;

269

m_documentIsHandlingDrag = tryDocumentDrag(dragData, m_dragDestinationAction, dragSession);

270

if (!m_documentIsHandlingDrag && (m_dragDestinationAction & DragDestinationActionLoad))

271

dragSession.operation = operationForLoad(dragData);

272

return dragSession;

273

}

274

275

static HTMLInputElement* asFileInput(Node* node)

276

{

277

ASSERT(node);

278

279

HTMLInputElement* inputElement = node->toInputElement();

280

281

// If this is a button inside of the a file input, move up to the file input.

282

if (inputElement && inputElement->isTextButton() && inputElement->treeScope()->rootNode()->isShadowRoot())

283

inputElement = toShadowRoot(inputElement->treeScope()->rootNode())->host()->toInputElement();

284

285

return inputElement && inputElement->isFileUpload() ? inputElement : 0;

286

}

287

288

// This can return null if an empty document is loaded.

289

static Element* elementUnderMouse(Document* documentUnderMouse, const IntPoint& p)

290

{

291

Frame* frame = documentUnderMouse->frame();

292

float zoomFactor = frame ? frame->pageZoomFactor() : 1;

293

LayoutPoint point = roundedLayoutPoint(FloatPoint(p.x() * zoomFactor, p.y() * zoomFactor));

294

295

HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);

296

HitTestResult result(point);

297

documentUnderMouse->renderView()->hitTest(request, result);

298

299

Node* n = result.innerNode();

300

while (n && !n->isElementNode())

301

n = n->parentNode();

302

if (n)

303

n = n->shadowAncestorNode();

304

305

return static_cast<Element*>(n);

306

}

307

308

bool DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask, DragSession& dragSession)

309

{

310

ASSERT(dragData);

311

312

if (!m_documentUnderMouse)

313

return false;

314

315

if (m_dragInitiator && !m_documentUnderMouse->securityOrigin()->canReceiveDragData(m_dragInitiator->securityOrigin()))

316

return false;

317

318

bool isHandlingDrag = false;

319

if (actionMask & DragDestinationActionDHTML) {

320

isHandlingDrag = tryDHTMLDrag(dragData, dragSession.operation);

321

// Do not continue if m_documentUnderMouse has been reset by tryDHTMLDrag.

322

// tryDHTMLDrag fires dragenter event. The event listener that listens

323

// to this event may create a nested message loop (open a modal dialog),

324

// which could process dragleave event and reset m_documentUnderMouse in

325

// dragExited.

326

if (!m_documentUnderMouse)

327

return false;

328

}

329

330

// It's unclear why this check is after tryDHTMLDrag.

331

// We send drag events in tryDHTMLDrag and that may be the reason.

332

RefPtr<FrameView> frameView = m_documentUnderMouse->view();

333

if (!frameView)

334

return false;

335

336

if (isHandlingDrag) {

337

m_page->dragCaretController()->clear();

338

return true;

339

}

340

341

if ((actionMask & DragDestinationActionEdit) && canProcessDrag(dragData)) {

342

if (dragData->containsColor()) {

343

dragSession.operation = DragOperationGeneric;

344

return true;

345

}

346

347

IntPoint point = frameView->windowToContents(dragData->clientPosition());

348

Element* element = elementUnderMouse(m_documentUnderMouse.get(), point);

349

if (!element)

350

return false;

351

352

HTMLInputElement* elementAsFileInput = asFileInput(element);

353

if (m_fileInputElementUnderMouse != elementAsFileInput) {

354

if (m_fileInputElementUnderMouse)

355

m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);

356

m_fileInputElementUnderMouse = elementAsFileInput;

357

}

358

359

if (!m_fileInputElementUnderMouse)

360

m_page->dragCaretController()->setCaretPosition(m_documentUnderMouse->frame()->visiblePositionForPoint(point));

361

362

Frame* innerFrame = element->document()->frame();

363

dragSession.operation = dragIsMove(innerFrame->selection(), dragData) ? DragOperationMove : DragOperationCopy;

364

dragSession.mouseIsOverFileInput = m_fileInputElementUnderMouse;

365

dragSession.numberOfItemsToBeAccepted = 0;

366

367

unsigned numberOfFiles = dragData->numberOfFiles();

368

if (m_fileInputElementUnderMouse) {

369

if (m_fileInputElementUnderMouse->disabled())

370

dragSession.numberOfItemsToBeAccepted = 0;

371

else if (m_fileInputElementUnderMouse->multiple())

372

dragSession.numberOfItemsToBeAccepted = numberOfFiles;

373

else if (numberOfFiles > 1)

374

dragSession.numberOfItemsToBeAccepted = 0;

375

else

376

dragSession.numberOfItemsToBeAccepted = 1;

377

378

if (!dragSession.numberOfItemsToBeAccepted)

379

dragSession.operation = DragOperationNone;

380

m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(dragSession.numberOfItemsToBeAccepted);

381

} else {

382

// We are not over a file input element. The dragged item(s) will only

383

// be loaded into the view the number of dragged items is 1.

384

dragSession.numberOfItemsToBeAccepted = numberOfFiles != 1 ? 0 : 1;

385

}

386

387

return true;

388

}

389

390

// We are not over an editable region. Make sure we're clearing any prior drag cursor.

391

m_page->dragCaretController()->clear();

392

if (m_fileInputElementUnderMouse)

393

m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);

394

m_fileInputElementUnderMouse = 0;

395

return false;

396

}

397

398

DragSourceAction DragController::delegateDragSourceAction(const IntPoint& rootViewPoint)

399

{

400

m_dragSourceAction = m_client->dragSourceActionMaskForPoint(rootViewPoint);

401

return m_dragSourceAction;

402

}

403

404

DragOperation DragController::operationForLoad(DragData* dragData)

405

{

406

ASSERT(dragData);

407

Document* doc = m_page->mainFrame()->documentAtPoint(dragData->clientPosition());

408

if (doc && (m_didInitiateDrag || doc->isPluginDocument() || doc->rendererIsEditable()))

409

return DragOperationNone;

410

return dragOperation(dragData);

411

}

412

413

static bool setSelectionToDragCaret(Frame* frame, VisibleSelection& dragCaret, RefPtr<Range>& range, const IntPoint& point)

414

{

415

frame->selection()->setSelection(dragCaret);

416

if (frame->selection()->isNone()) {

417

dragCaret = frame->visiblePositionForPoint(point);

418

frame->selection()->setSelection(dragCaret);

419

range = dragCaret.toNormalizedRange();

420

}

421

return !frame->selection()->isNone() && frame->selection()->isContentEditable();

422

}

423

424

bool DragController::dispatchTextInputEventFor(Frame* innerFrame, DragData* dragData)

425

{

426

ASSERT(m_page->dragCaretController()->hasCaret());

427

String text = m_page->dragCaretController()->isContentRichlyEditable() ? "" : dragData->asPlainText(innerFrame);

428

Node* target = innerFrame->editor()->findEventTargetFrom(m_page->dragCaretController()->caretPosition());

429

ExceptionCode ec = 0;

430

return target->dispatchEvent(TextEvent::createForDrop(innerFrame->document()->domWindow(), text), ec);

431

}

432

433

bool DragController::concludeEditDrag(DragData* dragData)

434

{

435

ASSERT(dragData);

436

437

RefPtr<HTMLInputElement> fileInput = m_fileInputElementUnderMouse;

438

if (m_fileInputElementUnderMouse) {

439

m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);

440

m_fileInputElementUnderMouse = 0;

441

}

442

443

if (!m_documentUnderMouse)

444

return false;

445

446

IntPoint point = m_documentUnderMouse->view()->windowToContents(dragData->clientPosition());

447

Element* element = elementUnderMouse(m_documentUnderMouse.get(), point);

448

if (!element)

449

return false;

450

RefPtr<Frame> innerFrame = element->ownerDocument()->frame();

451

ASSERT(innerFrame);

452

453

if (m_page->dragCaretController()->hasCaret() && !dispatchTextInputEventFor(innerFrame.get(), dragData))

454

return true;

455

456

if (dragData->containsColor()) {

457

Color color = dragData->asColor();

458

if (!color.isValid())

459

return false;

460

RefPtr<Range> innerRange = innerFrame->selection()->toNormalizedRange();

461

RefPtr<StylePropertySet> style = StylePropertySet::create();

462

style->setProperty(CSSPropertyColor, color.serialized(), false);

463

if (!innerFrame->editor()->shouldApplyStyle(style.get(), innerRange.get()))

464

return false;

465

m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);

466

innerFrame->editor()->applyStyle(style.get(), EditActionSetColor);

467

return true;

468

}

469

470

if (dragData->containsFiles() && fileInput) {

471

// fileInput should be the element we hit tested for, unless it was made

472

// display:none in a drop event handler.

473

ASSERT(fileInput == element || !fileInput->renderer());

474

if (fileInput->disabled())

475

return false;

476

477

return fileInput->receiveDroppedFiles(dragData);

478

}

479

480

if (!m_page->dragController()->canProcessDrag(dragData)) {

481

m_page->dragCaretController()->clear();

482

return false;

483

}

484

485

VisibleSelection dragCaret = m_page->dragCaretController()->caretPosition();

486

m_page->dragCaretController()->clear();

487

RefPtr<Range> range = dragCaret.toNormalizedRange();

488

RefPtr<Element> rootEditableElement = innerFrame->selection()->rootEditableElement();

489

490

// For range to be null a WebKit client must have done something bad while

491

// manually controlling drag behaviour

492

if (!range)

493

return false;

494

CachedResourceLoader* cachedResourceLoader = range->ownerDocument()->cachedResourceLoader();

495

ResourceCacheValidationSuppressor validationSuppressor(cachedResourceLoader);

496

if (dragIsMove(innerFrame->selection(), dragData) || dragCaret.isContentRichlyEditable()) {

497

bool chosePlainText = false;

498

RefPtr<DocumentFragment> fragment = documentFragmentFromDragData(dragData, innerFrame.get(), range, true, chosePlainText);

499

if (!fragment || !innerFrame->editor()->shouldInsertFragment(fragment, range, EditorInsertActionDropped)) {

500

return false;

501

}

502

503

m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);

504

if (dragIsMove(innerFrame->selection(), dragData)) {

505

// NSTextView behavior is to always smart delete on moving a selection,

506

// but only to smart insert if the selection granularity is word granularity.

507

bool smartDelete = innerFrame->editor()->smartInsertDeleteEnabled();

508

bool smartInsert = smartDelete && innerFrame->selection()->granularity() == WordGranularity && dragData->canSmartReplace();

509

applyCommand(MoveSelectionCommand::create(fragment, dragCaret.base(), smartInsert, smartDelete));

510

} else {

511

if (setSelectionToDragCaret(innerFrame.get(), dragCaret, range, point)) {

512

ReplaceSelectionCommand::CommandOptions options = ReplaceSelectionCommand::SelectReplacement | ReplaceSelectionCommand::PreventNesting;

513

if (dragData->canSmartReplace())

514

options |= ReplaceSelectionCommand::SmartReplace;

515

if (chosePlainText)

516

options |= ReplaceSelectionCommand::MatchStyle;

517

applyCommand(ReplaceSelectionCommand::create(m_documentUnderMouse.get(), fragment, options));

518

}

519

}

520

} else {

521

String text = dragData->asPlainText(innerFrame.get());

522

if (text.isEmpty() || !innerFrame->editor()->shouldInsertText(text, range.get(), EditorInsertActionDropped)) {

523

return false;

524

}

525

526

m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dragData);

527

if (setSelectionToDragCaret(innerFrame.get(), dragCaret, range, point))

528

applyCommand(ReplaceSelectionCommand::create(m_documentUnderMouse.get(), createFragmentFromText(range.get(), text), ReplaceSelectionCommand::SelectReplacement | ReplaceSelectionCommand::MatchStyle | ReplaceSelectionCommand::PreventNesting));

529

}

530

531

if (rootEditableElement) {

532

if (Frame* frame = rootEditableElement->document()->frame())

533

frame->eventHandler()->updateDragStateAfterEditDragIfNeeded(rootEditableElement.get());

534

}

535

536

return true;

537

}

538

539

bool DragController::canProcessDrag(DragData* dragData)

540

{

541

ASSERT(dragData);

542

543

if (!dragData->containsCompatibleContent())

544

return false;

545

546

IntPoint point = m_page->mainFrame()->view()->windowToContents(dragData->clientPosition());

547

HitTestResult result = HitTestResult(point);

548

if (!m_page->mainFrame()->contentRenderer())

549

return false;

550

551

result = m_page->mainFrame()->eventHandler()->hitTestResultAtPoint(point, true);

552

553

if (!result.innerNonSharedNode())

554

return false;

555

556

if (dragData->containsFiles() && asFileInput(result.innerNonSharedNode()))

557

return true;

558

559

if (result.innerNonSharedNode()->isPluginElement()) {

560

HTMLPlugInElement* plugin = static_cast<HTMLPlugInElement*>(result.innerNonSharedNode());

561

if (!plugin->canProcessDrag() && !result.innerNonSharedNode()->rendererIsEditable())

562

return false;

563

} else if (!result.innerNonSharedNode()->rendererIsEditable())

564

return false;

565

566

if (m_didInitiateDrag && m_documentUnderMouse == m_dragInitiator && result.isSelected())

567

return false;

568

569

return true;

570

}

571

572

static DragOperation defaultOperationForDrag(DragOperation srcOpMask)

573

{

574

// This is designed to match IE's operation fallback for the case where

575

// the page calls preventDefault() in a drag event but doesn't set dropEffect.

576

if (srcOpMask == DragOperationEvery)

577

return DragOperationCopy;

578

if (srcOpMask == DragOperationNone)

579

return DragOperationNone;

580

if (srcOpMask & DragOperationMove || srcOpMask & DragOperationGeneric)

581

return DragOperationMove;

582

if (srcOpMask & DragOperationCopy)

583

return DragOperationCopy;

584

if (srcOpMask & DragOperationLink)

585

return DragOperationLink;

586

587

// FIXME: Does IE really return "generic" even if no operations were allowed by the source?

588

return DragOperationGeneric;

589

}

590

591

bool DragController::tryDHTMLDrag(DragData* dragData, DragOperation& operation)

592

{

593

ASSERT(dragData);

594

ASSERT(m_documentUnderMouse);

595

RefPtr<Frame> mainFrame = m_page->mainFrame();

596

RefPtr<FrameView> viewProtector = mainFrame->view();

597

if (!viewProtector)

598

return false;

599

600

ClipboardAccessPolicy policy = m_documentUnderMouse->securityOrigin()->isLocal() ? ClipboardReadable : ClipboardTypesReadable;

601

RefPtr<Clipboard> clipboard = Clipboard::create(policy, dragData, mainFrame.get());

602

DragOperation srcOpMask = dragData->draggingSourceOperationMask();

603

clipboard->setSourceOperation(srcOpMask);

604

605

PlatformMouseEvent event = createMouseEvent(dragData);

606

if (!mainFrame->eventHandler()->updateDragAndDrop(event, clipboard.get())) {

607

clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard here for security

608

return false;

609

}

610

611

operation = clipboard->destinationOperation();

612

if (clipboard->dropEffectIsUninitialized())

613

operation = defaultOperationForDrag(srcOpMask);

614

else if (!(srcOpMask & operation)) {

615

// The element picked an operation which is not supported by the source

616

operation = DragOperationNone;

617

}

618

619

clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard here for security

620

return true;

621

}

622

623

Node* DragController::draggableNode(const Frame* src, Node* startNode, const IntPoint& dragOrigin, DragState& state) const

624

{

625

state.m_dragType = (src->selection()->contains(dragOrigin)) ? DragSourceActionSelection : DragSourceActionNone;

626

627

for (const RenderObject* renderer = startNode->renderer(); renderer; renderer = renderer->parent()) {

628

Node* node = renderer->node();

629

if (!node)

630

// Anonymous render blocks don't correspond to actual DOM nodes, so we skip over them

631

// for the purposes of finding a draggable node.

632

continue;

633

if (!(state.m_dragType & DragSourceActionSelection) && node->isTextNode() && node->canStartSelection())

634

// In this case we have a click in the unselected portion of text. If this text is

635

// selectable, we want to start the selection process instead of looking for a parent

636

// to try to drag.

637

return 0;

638

if (node->isElementNode()) {

639

EUserDrag dragMode = renderer->style()->userDrag();

640

if ((m_dragSourceAction & DragSourceActionDHTML) && dragMode == DRAG_ELEMENT) {

641

state.m_dragType = static_cast<DragSourceAction>(state.m_dragType | DragSourceActionDHTML);

642

return node;

643

}

644

if (dragMode == DRAG_AUTO) {

645

if ((m_dragSourceAction & DragSourceActionImage)

646

&& node->hasTagName(HTMLNames::imgTag)

647

&& src->settings()

648

&& src->settings()->loadsImagesAutomatically()) {

649

state.m_dragType = static_cast<DragSourceAction>(state.m_dragType | DragSourceActionImage);

650

return node;

651

}

652

if ((m_dragSourceAction & DragSourceActionLink)

653

&& node->hasTagName(HTMLNames::aTag)

654

&& static_cast<HTMLAnchorElement*>(node)->isLiveLink()) {

655

state.m_dragType = static_cast<DragSourceAction>(state.m_dragType | DragSourceActionLink);

656

return node;

657

}

658

}

659

}

660

}

661

662

// We either have nothing to drag or we have a selection and we're not over a draggable element.

663

return (state.m_dragType & DragSourceActionSelection) ? startNode : 0;

664

}

665

666

static CachedImage* getCachedImage(Element* element)

667

{

668

ASSERT(element);

669

RenderObject* renderer = element->renderer();

670

if (!renderer || !renderer->isImage())

671

return 0;

672

RenderImage* image = toRenderImage(renderer);

673

return image->cachedImage();

674

}

675

676

static Image* getImage(Element* element)

677

{

678

ASSERT(element);

679

CachedImage* cachedImage = getCachedImage(element);

680

// Don't use cachedImage->imageForRenderer() here as that may return BitmapImages for cached SVG Images.

681

// Users of getImage() want access to the SVGImage, in order to figure out the filename extensions,

682

// which would be empty when asking the cached BitmapImages.

683

return (cachedImage && !cachedImage->errorOccurred()) ?

684

cachedImage->image() : 0;

685

}

686

687

static void prepareClipboardForImageDrag(Frame* source, Clipboard* clipboard, Element* node, const KURL& linkURL, const KURL& imageURL, const String& label)

688

{

689

if (node->isContentRichlyEditable()) {

690

RefPtr<Range> range = source->document()->createRange();

691

ExceptionCode ec = 0;

692

range->selectNode(node, ec);

693

ASSERT(!ec);

694

source->selection()->setSelection(VisibleSelection(range.get(), DOWNSTREAM));

695

}

696

clipboard->declareAndWriteDragImage(node, !linkURL.isEmpty() ? linkURL : imageURL, label, source);

697

}

698

699

static IntPoint dragLocForDHTMLDrag(const IntPoint& mouseDraggedPoint, const IntPoint& dragOrigin, const IntPoint& dragImageOffset, bool isLinkImage)

700

{

701

// dragImageOffset is the cursor position relative to the lower-left corner of the image.

702

#if PLATFORM(MAC)

703

// We add in the Y dimension because we are a flipped view, so adding moves the image down.

704

const int yOffset = dragImageOffset.y();

705

#else

706

const int yOffset = -dragImageOffset.y();

707

#endif

708

709

if (isLinkImage)

710

return IntPoint(mouseDraggedPoint.x() - dragImageOffset.x(), mouseDraggedPoint.y() + yOffset);

711

712

return IntPoint(dragOrigin.x() - dragImageOffset.x(), dragOrigin.y() + yOffset);

713

}

714

715

static IntPoint dragLocForSelectionDrag(Frame* src)

716

{

717

IntRect draggingRect = enclosingIntRect(src->selection()->bounds());

718

int xpos = draggingRect.maxX();

719

xpos = draggingRect.x() < xpos ? draggingRect.x() : xpos;

720

int ypos = draggingRect.maxY();

721

#if PLATFORM(MAC)

722

// Deal with flipped coordinates on Mac

723

ypos = draggingRect.y() > ypos ? draggingRect.y() : ypos;

724

#else

725

ypos = draggingRect.y() < ypos ? draggingRect.y() : ypos;

726

#endif

727

return IntPoint(xpos, ypos);

728

}

729

730

bool DragController::startDrag(Frame* src, const DragState& state, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin)

731

{

732

ASSERT(src);

733

734

if (!src->view() || !src->contentRenderer())

735

return false;

736

737

HitTestResult hitTestResult = src->eventHandler()->hitTestResultAtPoint(dragOrigin, true);

738

if (!state.m_dragSrc->contains(hitTestResult.innerNode()))

739

// The original node being dragged isn't under the drag origin anymore... maybe it was

740

// hidden or moved out from under the cursor. Regardless, we don't want to start a drag on

741

// something that's not actually under the drag origin.

742

return false;

743

KURL linkURL = hitTestResult.absoluteLinkURL();

744

KURL imageURL = hitTestResult.absoluteImageURL();

745

746

IntPoint mouseDraggedPoint = src->view()->windowToContents(dragEvent.position());

747

748

m_draggingImageURL = KURL();

749

m_sourceDragOperation = srcOp;

750

751

DragImageRef dragImage = 0;

752

IntPoint dragLoc(0, 0);

753

IntPoint dragImageOffset(0, 0);

754

755

Clipboard* clipboard = state.m_dragClipboard.get();

756

if (state.m_dragType == DragSourceActionDHTML)

757

dragImage = clipboard->createDragImage(dragImageOffset);

758

if (state.m_dragType == DragSourceActionSelection || !imageURL.isEmpty() || !linkURL.isEmpty())

759

// Selection, image, and link drags receive a default set of allowed drag operations that

760

// follows from:

761

// http://trac.webkit.org/browser/trunk/WebKit/mac/WebView/WebHTMLView.mm?rev=48526#L3430

762

m_sourceDragOperation = static_cast<DragOperation>(m_sourceDragOperation | DragOperationGeneric | DragOperationCopy);

763

764

// We allow DHTML/JS to set the drag image, even if its a link, image or text we're dragging.

765

// This is in the spirit of the IE API, which allows overriding of pasteboard data and DragOp.

766

if (dragImage) {

767

dragLoc = dragLocForDHTMLDrag(mouseDraggedPoint, dragOrigin, dragImageOffset, !linkURL.isEmpty());

768

m_dragOffset = dragImageOffset;

769

}

770

771

bool startedDrag = true; // optimism - we almost always manage to start the drag

772

773

Node* node = state.m_dragSrc.get();

774

775

Image* image = getImage(static_cast<Element*>(node));

776

if (state.m_dragType == DragSourceActionSelection) {

777

if (!clipboard->hasData()) {

778

if (enclosingTextFormControl(src->selection()->start()))

779

clipboard->writePlainText(src->editor()->selectedText());

780

else {

781

RefPtr<Range> selectionRange = src->selection()->toNormalizedRange();

782

ASSERT(selectionRange);

783

784

clipboard->writeRange(selectionRange.get(), src);

785

}

786

}

787

m_client->willPerformDragSourceAction(DragSourceActionSelection, dragOrigin, clipboard);

788

if (!dragImage) {

789

dragImage = createDragImageForSelection(src);

790

dragLoc = dragLocForSelectionDrag(src);

791

m_dragOffset = IntPoint(dragOrigin.x() - dragLoc.x(), dragOrigin.y() - dragLoc.y());

792

}

793

doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);

794

} else if (!imageURL.isEmpty() && node && node->isElementNode() && image && !image->isNull()

795

&& (m_dragSourceAction & DragSourceActionImage)) {

796

// We shouldn't be starting a drag for an image that can't provide an extension.

797

// This is an early detection for problems encountered later upon drop.

798

ASSERT(!image->filenameExtension().isEmpty());

799

Element* element = static_cast<Element*>(node);

800

if (!clipboard->hasData()) {

801

m_draggingImageURL = imageURL;

802

prepareClipboardForImageDrag(src, clipboard, element, linkURL, imageURL, hitTestResult.altDisplayString());

803

}

804

805

m_client->willPerformDragSourceAction(DragSourceActionImage, dragOrigin, clipboard);

806

807

if (!dragImage) {

808

IntRect imageRect = hitTestResult.imageRect();

809

imageRect.setLocation(m_page->mainFrame()->view()->rootViewToContents(src->view()->contentsToRootView(imageRect.location())));

810

doImageDrag(element, dragOrigin, hitTestResult.imageRect(), clipboard, src, m_dragOffset);

811

} else

812

// DHTML defined drag image

813

doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);

814

815

} else if (!linkURL.isEmpty() && (m_dragSourceAction & DragSourceActionLink)) {

816

if (!clipboard->hasData())

817

// Simplify whitespace so the title put on the clipboard resembles what the user sees

818

// on the web page. This includes replacing newlines with spaces.

819

clipboard->writeURL(linkURL, hitTestResult.textContent().simplifyWhiteSpace(), src);

820

821

if (src->selection()->isCaret() && src->selection()->isContentEditable()) {

822

// a user can initiate a drag on a link without having any text

823

// selected. In this case, we should expand the selection to

824

// the enclosing anchor element

825

Position pos = src->selection()->base();

826

Node* node = enclosingAnchorElement(pos);

827

if (node)

828

src->selection()->setSelection(VisibleSelection::selectionFromContentsOfNode(node));

829

}

830

831

m_client->willPerformDragSourceAction(DragSourceActionLink, dragOrigin, clipboard);

832

if (!dragImage) {

833

dragImage = createDragImageForLink(linkURL, hitTestResult.textContent(), src);

834

IntSize size = dragImageSize(dragImage);

835

m_dragOffset = IntPoint(-size.width() / 2, -LinkDragBorderInset);

836

dragLoc = IntPoint(mouseDraggedPoint.x() + m_dragOffset.x(), mouseDraggedPoint.y() + m_dragOffset.y());

837

}

838

doSystemDrag(dragImage, dragLoc, mouseDraggedPoint, clipboard, src, true);

839

} else if (state.m_dragType == DragSourceActionDHTML) {

840

ASSERT(m_dragSourceAction & DragSourceActionDHTML);

841

m_client->willPerformDragSourceAction(DragSourceActionDHTML, dragOrigin, clipboard);

842

doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);

843

} else {

844

// draggableNode() determined an image or link node was draggable, but it turns out the

845

// image or link had no URL, so there is nothing to drag.

846

startedDrag = false;

847

}

848

849

if (dragImage)

850

deleteDragImage(dragImage);

851

return startedDrag;

852

}

853

854

void DragController::doImageDrag(Element* element, const IntPoint& dragOrigin, const IntRect& rect, Clipboard* clipboard, Frame* frame, IntPoint& dragImageOffset)

855

{

856

IntPoint mouseDownPoint = dragOrigin;

857

DragImageRef dragImage;

858

IntPoint origin;

859

860

Image* image = getImage(element);

861

if (image && image->size().height() * image->size().width() <= MaxOriginalImageArea

862

&& (dragImage = createDragImageFromImage(image, element->renderer() ? element->renderer()->shouldRespectImageOrientation() : DoNotRespectImageOrientation))) {

863

IntSize originalSize = rect.size();

864

origin = rect.location();

865

866

dragImage = fitDragImageToMaxSize(dragImage, rect.size(), maxDragImageSize());

867

dragImage = dissolveDragImageToFraction(dragImage, DragImageAlpha);

868

IntSize newSize = dragImageSize(dragImage);

869

870

// Properly orient the drag image and orient it differently if it's smaller than the original

871

float scale = newSize.width() / (float)originalSize.width();

872

float dx = origin.x() - mouseDownPoint.x();

873

dx *= scale;

874

origin.setX((int)(dx + 0.5));

875

#if PLATFORM(MAC)

876

//Compensate for accursed flipped coordinates in cocoa

877

origin.setY(origin.y() + originalSize.height());

878

#endif

879

float dy = origin.y() - mouseDownPoint.y();

880

dy *= scale;

881

origin.setY((int)(dy + 0.5));

882

} else {

883

dragImage = createDragImageIconForCachedImage(getCachedImage(element));

884

if (dragImage)

885

origin = IntPoint(DragIconRightInset - dragImageSize(dragImage).width(), DragIconBottomInset);

886

}

887

888

dragImageOffset = mouseDownPoint + origin;

889

doSystemDrag(dragImage, dragImageOffset, dragOrigin, clipboard, frame, false);

890

891

deleteDragImage(dragImage);

892

}

893

894

void DragController::doSystemDrag(DragImageRef image, const IntPoint& dragLoc, const IntPoint& eventPos, Clipboard* clipboard, Frame* frame, bool forLink)

895

{

896

m_didInitiateDrag = true;

897

m_dragInitiator = frame->document();

898

// Protect this frame and view, as a load may occur mid drag and attempt to unload this frame

899

RefPtr<Frame> frameProtector = m_page->mainFrame();

900

RefPtr<FrameView> viewProtector = frameProtector->view();

901

m_client->startDrag(image, viewProtector->rootViewToContents(frame->view()->contentsToRootView(dragLoc)),

902

viewProtector->rootViewToContents(frame->view()->contentsToRootView(eventPos)), clipboard, frameProtector.get(), forLink);

903

// DragClient::startDrag can cause our Page to dispear, deallocating |this|.

904

if (!frameProtector->page())

905

return;

906

907

cleanupAfterSystemDrag();

908

}

909

910

// Manual drag caret manipulation

911

void DragController::placeDragCaret(const IntPoint& windowPoint)

912

{

913

mouseMovedIntoDocument(m_page->mainFrame()->documentAtPoint(windowPoint));

914

if (!m_documentUnderMouse)

915

return;

916

Frame* frame = m_documentUnderMouse->frame();

917

FrameView* frameView = frame->view();

918

if (!frameView)

919

return;

920

IntPoint framePoint = frameView->windowToContents(windowPoint);

921

922

m_page->dragCaretController()->setCaretPosition(frame->visiblePositionForPoint(framePoint));

923

}

924

925

} // namespace WebCore

926

927

#endif // ENABLE(DRAG_SUPPORT)

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