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28 #include "core/editing/InputMethodController.h"
30 #include "core/events/CompositionEvent.h"
31 #include "core/dom/Document.h"
32 #include "core/dom/Element.h"
33 #include "core/dom/Range.h"
34 #include "core/dom/Text.h"
35 #include "core/editing/Editor.h"
36 #include "core/editing/TypingCommand.h"
37 #include "core/frame/LocalFrame.h"
38 #include "core/html/HTMLTextAreaElement.h"
39 #include "core/page/Chrome.h"
40 #include "core/page/ChromeClient.h"
41 #include "core/page/EventHandler.h"
42 #include "core/rendering/RenderObject.h"
46 InputMethodController::SelectionOffsetsScope::SelectionOffsetsScope(InputMethodController* inputMethodController)
47 : m_inputMethodController(inputMethodController)
48 , m_offsets(inputMethodController->getSelectionOffsets())
52 InputMethodController::SelectionOffsetsScope::~SelectionOffsetsScope()
54 m_inputMethodController->setSelectionOffsets(m_offsets);
57 // ----------------------------
59 PassOwnPtr<InputMethodController> InputMethodController::create(LocalFrame& frame)
61 return adoptPtr(new InputMethodController(frame));
64 InputMethodController::InputMethodController(LocalFrame& frame)
66 , m_compositionStart(0)
71 InputMethodController::~InputMethodController()
75 bool InputMethodController::hasComposition() const
77 return m_compositionNode && m_compositionNode->isContentEditable();
80 inline Editor& InputMethodController::editor() const
82 return m_frame.editor();
85 void InputMethodController::clear()
87 m_compositionNode = nullptr;
88 m_customCompositionUnderlines.clear();
91 bool InputMethodController::insertTextForConfirmedComposition(const String& text)
93 return m_frame.eventHandler().handleTextInputEvent(text, 0, TextEventInputComposition);
96 void InputMethodController::selectComposition() const
98 RefPtrWillBeRawPtr<Range> range = compositionRange();
102 // The composition can start inside a composed character sequence, so we have to override checks.
103 // See <http://bugs.webkit.org/show_bug.cgi?id=15781>
104 VisibleSelection selection;
105 selection.setWithoutValidation(range->startPosition(), range->endPosition());
106 m_frame.selection().setSelection(selection, 0);
109 bool InputMethodController::confirmComposition()
111 if (!hasComposition())
113 return finishComposition(m_compositionNode->data().substring(m_compositionStart, m_compositionEnd - m_compositionStart), ConfirmComposition);
116 bool InputMethodController::confirmComposition(const String& text)
118 return finishComposition(text, ConfirmComposition);
121 bool InputMethodController::confirmCompositionOrInsertText(const String& text, ConfirmCompositionBehavior confirmBehavior)
123 if (!hasComposition()) {
126 editor().insertText(text, 0);
131 confirmComposition(text);
135 if (confirmBehavior != KeepSelection)
136 return confirmComposition();
138 SelectionOffsetsScope selectionOffsetsScope(this);
139 return confirmComposition();
142 void InputMethodController::confirmCompositionAndResetState()
144 if (!hasComposition())
147 // ChromeClient::willSetInputMethodState() resets input method and the composition string is committed.
148 m_frame.chromeClient().willSetInputMethodState();
151 void InputMethodController::cancelComposition()
153 finishComposition(emptyString(), CancelComposition);
156 void InputMethodController::cancelCompositionIfSelectionIsInvalid()
158 if (!hasComposition() || editor().preventRevealSelection())
161 // Check if selection start and selection end are valid.
162 Position start = m_frame.selection().start();
163 Position end = m_frame.selection().end();
164 if (start.containerNode() == m_compositionNode
165 && end.containerNode() == m_compositionNode
166 && static_cast<unsigned>(start.computeOffsetInContainerNode()) >= m_compositionStart
167 && static_cast<unsigned>(end.computeOffsetInContainerNode()) <= m_compositionEnd)
171 m_frame.chromeClient().didCancelCompositionOnSelectionChange();
174 bool InputMethodController::finishComposition(const String& text, FinishCompositionMode mode)
176 if (!hasComposition())
179 ASSERT(mode == ConfirmComposition || mode == CancelComposition);
181 Editor::RevealSelectionScope revealSelectionScope(&editor());
183 if (mode == CancelComposition)
184 ASSERT(text == emptyString());
188 if (m_frame.selection().isNone())
191 // Dispatch a compositionend event to the focused node.
192 // We should send this event before sending a TextEvent as written in Section 6.2.2 and 6.2.3 of
193 // the DOM Event specification.
194 if (Element* target = m_frame.document()->focusedElement()) {
195 unsigned baseOffset = m_frame.selection().base().downstream().deprecatedEditingOffset();
196 Vector<CompositionUnderline> underlines;
197 for (size_t i = 0; i < m_customCompositionUnderlines.size(); ++i) {
198 CompositionUnderline underline = m_customCompositionUnderlines[i];
199 underline.startOffset -= baseOffset;
200 underline.endOffset -= baseOffset;
201 underlines.append(underline);
203 RefPtrWillBeRawPtr<CompositionEvent> event = CompositionEvent::create(EventTypeNames::compositionend, m_frame.domWindow(), text, underlines);
204 target->dispatchEvent(event, IGNORE_EXCEPTION);
207 // If text is empty, then delete the old composition here. If text is non-empty, InsertTextCommand::input
208 // will delete the old composition with an optimized replace operation.
209 if (text.isEmpty() && mode != CancelComposition) {
210 ASSERT(m_frame.document());
211 TypingCommand::deleteSelection(*m_frame.document(), 0);
214 m_compositionNode = nullptr;
215 m_customCompositionUnderlines.clear();
217 insertTextForConfirmedComposition(text);
219 if (mode == CancelComposition) {
220 // An open typing command that disagrees about current selection would cause issues with typing later on.
221 TypingCommand::closeTyping(&m_frame);
227 void InputMethodController::setComposition(const String& text, const Vector<CompositionUnderline>& underlines, unsigned selectionStart, unsigned selectionEnd)
229 Editor::RevealSelectionScope revealSelectionScope(&editor());
231 // Updates styles before setting selection for composition to prevent
232 // inserting the previous composition text into text nodes oddly.
233 // See https://bugs.webkit.org/show_bug.cgi?id=46868
234 m_frame.document()->updateRenderTreeIfNeeded();
238 if (m_frame.selection().isNone())
241 if (Element* target = m_frame.document()->focusedElement()) {
242 // Dispatch an appropriate composition event to the focused node.
243 // We check the composition status and choose an appropriate composition event since this
244 // function is used for three purposes:
245 // 1. Starting a new composition.
246 // Send a compositionstart and a compositionupdate event when this function creates
247 // a new composition node, i.e.
248 // m_compositionNode == 0 && !text.isEmpty().
249 // Sending a compositionupdate event at this time ensures that at least one
250 // compositionupdate event is dispatched.
251 // 2. Updating the existing composition node.
252 // Send a compositionupdate event when this function updates the existing composition
253 // node, i.e. m_compositionNode != 0 && !text.isEmpty().
254 // 3. Canceling the ongoing composition.
255 // Send a compositionend event when function deletes the existing composition node, i.e.
256 // m_compositionNode != 0 && test.isEmpty().
257 RefPtrWillBeRawPtr<CompositionEvent> event = nullptr;
258 if (!hasComposition()) {
259 // We should send a compositionstart event only when the given text is not empty because this
260 // function doesn't create a composition node when the text is empty.
261 if (!text.isEmpty()) {
262 target->dispatchEvent(CompositionEvent::create(EventTypeNames::compositionstart, m_frame.domWindow(), m_frame.selectedText(), underlines));
263 event = CompositionEvent::create(EventTypeNames::compositionupdate, m_frame.domWindow(), text, underlines);
267 event = CompositionEvent::create(EventTypeNames::compositionupdate, m_frame.domWindow(), text, underlines);
269 event = CompositionEvent::create(EventTypeNames::compositionend, m_frame.domWindow(), text, underlines);
272 target->dispatchEvent(event, IGNORE_EXCEPTION);
275 // If text is empty, then delete the old composition here. If text is non-empty, InsertTextCommand::input
276 // will delete the old composition with an optimized replace operation.
277 if (text.isEmpty()) {
278 ASSERT(m_frame.document());
279 TypingCommand::deleteSelection(*m_frame.document(), TypingCommand::PreventSpellChecking);
282 m_compositionNode = nullptr;
283 m_customCompositionUnderlines.clear();
285 if (!text.isEmpty()) {
286 ASSERT(m_frame.document());
287 TypingCommand::insertText(*m_frame.document(), text, TypingCommand::SelectInsertedText | TypingCommand::PreventSpellChecking, TypingCommand::TextCompositionUpdate);
289 // Find out what node has the composition now.
290 Position base = m_frame.selection().base().downstream();
291 Position extent = m_frame.selection().extent();
292 Node* baseNode = base.deprecatedNode();
293 unsigned baseOffset = base.deprecatedEditingOffset();
294 Node* extentNode = extent.deprecatedNode();
295 unsigned extentOffset = extent.deprecatedEditingOffset();
297 if (baseNode && baseNode == extentNode && baseNode->isTextNode() && baseOffset + text.length() == extentOffset) {
298 m_compositionNode = toText(baseNode);
299 m_compositionStart = baseOffset;
300 m_compositionEnd = extentOffset;
301 m_customCompositionUnderlines = underlines;
302 size_t numUnderlines = m_customCompositionUnderlines.size();
303 for (size_t i = 0; i < numUnderlines; ++i) {
304 m_customCompositionUnderlines[i].startOffset += baseOffset;
305 m_customCompositionUnderlines[i].endOffset += baseOffset;
307 if (baseNode->renderer())
308 baseNode->renderer()->paintInvalidationForWholeRenderer();
310 unsigned start = std::min(baseOffset + selectionStart, extentOffset);
311 unsigned end = std::min(std::max(start, baseOffset + selectionEnd), extentOffset);
312 RefPtrWillBeRawPtr<Range> selectedRange = Range::create(baseNode->document(), baseNode, start, baseNode, end);
313 m_frame.selection().setSelectedRange(selectedRange.get(), DOWNSTREAM, FrameSelection::NonDirectional, NotUserTriggered);
318 void InputMethodController::setCompositionFromExistingText(const Vector<CompositionUnderline>& underlines, unsigned compositionStart, unsigned compositionEnd)
320 Element* editable = m_frame.selection().rootEditableElement();
321 Position base = m_frame.selection().base().downstream();
322 Node* baseNode = base.anchorNode();
323 if (editable->firstChild() == baseNode && editable->lastChild() == baseNode && baseNode->isTextNode()) {
324 m_compositionNode = nullptr;
325 m_customCompositionUnderlines.clear();
327 if (base.anchorType() != Position::PositionIsOffsetInAnchor)
329 if (!baseNode || baseNode != m_frame.selection().extent().anchorNode())
332 m_compositionNode = toText(baseNode);
333 RefPtrWillBeRawPtr<Range> range = PlainTextRange(compositionStart, compositionEnd).createRange(*editable);
337 m_compositionStart = range->startOffset();
338 m_compositionEnd = range->endOffset();
339 m_customCompositionUnderlines = underlines;
340 size_t numUnderlines = m_customCompositionUnderlines.size();
341 for (size_t i = 0; i < numUnderlines; ++i) {
342 m_customCompositionUnderlines[i].startOffset += m_compositionStart;
343 m_customCompositionUnderlines[i].endOffset += m_compositionStart;
345 if (baseNode->renderer())
346 baseNode->renderer()->paintInvalidationForWholeRenderer();
350 Editor::RevealSelectionScope revealSelectionScope(&editor());
351 SelectionOffsetsScope selectionOffsetsScope(this);
352 setSelectionOffsets(PlainTextRange(compositionStart, compositionEnd));
353 setComposition(m_frame.selectedText(), underlines, 0, 0);
356 PassRefPtrWillBeRawPtr<Range> InputMethodController::compositionRange() const
358 if (!hasComposition())
360 unsigned length = m_compositionNode->length();
361 unsigned start = std::min(m_compositionStart, length);
362 unsigned end = std::min(std::max(start, m_compositionEnd), length);
365 return Range::create(m_compositionNode->document(), m_compositionNode.get(), start, m_compositionNode.get(), end);
368 PlainTextRange InputMethodController::getSelectionOffsets() const
370 RefPtrWillBeRawPtr<Range> range = m_frame.selection().selection().firstRange();
372 return PlainTextRange();
373 ContainerNode* editable = m_frame.selection().rootEditableElementOrTreeScopeRootNode();
375 return PlainTextRange::create(*editable, *range.get());
378 bool InputMethodController::setSelectionOffsets(const PlainTextRange& selectionOffsets)
380 if (selectionOffsets.isNull())
382 Element* rootEditableElement = m_frame.selection().rootEditableElement();
383 if (!rootEditableElement)
386 RefPtrWillBeRawPtr<Range> range = selectionOffsets.createRange(*rootEditableElement);
390 return m_frame.selection().setSelectedRange(range.get(), VP_DEFAULT_AFFINITY, FrameSelection::NonDirectional, FrameSelection::CloseTyping);
393 bool InputMethodController::setEditableSelectionOffsets(const PlainTextRange& selectionOffsets)
395 if (!editor().canEdit())
397 return setSelectionOffsets(selectionOffsets);
400 void InputMethodController::extendSelectionAndDelete(int before, int after)
402 if (!editor().canEdit())
404 PlainTextRange selectionOffsets(getSelectionOffsets());
405 if (selectionOffsets.isNull())
408 // A common call of before=1 and after=0 will fail if the last character
409 // is multi-code-word UTF-16, including both multi-16bit code-points and
410 // Unicode combining character sequences of multiple single-16bit code-
411 // points (officially called "compositions"). Try more until success.
412 // http://crbug.com/355995
414 // FIXME: Note that this is not an ideal solution when this function is
415 // called to implement "backspace". In that case, there should be some call
416 // that will not delete a full multi-code-point composition but rather
417 // only the last code-point so that it's possible for a user to correct
418 // a composition without starting it from the beginning.
419 // http://crbug.com/37993
421 if (!setSelectionOffsets(PlainTextRange(std::max(static_cast<int>(selectionOffsets.start()) - before, 0), selectionOffsets.end() + after)))
426 } while (m_frame.selection().start() == m_frame.selection().end() && before <= static_cast<int>(selectionOffsets.start()));
427 TypingCommand::deleteSelection(*m_frame.document());