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32 #include "core/editing/DOMSelection.h"
34 #include "bindings/core/v8/ExceptionMessages.h"
35 #include "bindings/core/v8/ExceptionState.h"
36 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
37 #include "core/dom/Document.h"
38 #include "core/dom/ExceptionCode.h"
39 #include "core/dom/Node.h"
40 #include "core/dom/Range.h"
41 #include "core/dom/TreeScope.h"
42 #include "core/editing/FrameSelection.h"
43 #include "core/editing/TextIterator.h"
44 #include "core/editing/htmlediting.h"
45 #include "core/frame/LocalFrame.h"
46 #include "core/inspector/ConsoleMessage.h"
47 #include "wtf/text/WTFString.h"
51 static Node* selectionShadowAncestor(LocalFrame* frame)
53 Node* node = frame->selection().selection().base().anchorNode();
57 if (!node->isInShadowTree())
60 return frame->document()->ancestorInThisScope(node);
63 DOMSelection::DOMSelection(const TreeScope* treeScope)
64 : DOMWindowProperty(treeScope->rootNode().document().frame())
65 , m_treeScope(treeScope)
69 void DOMSelection::clearTreeScope()
71 m_treeScope = nullptr;
74 const VisibleSelection& DOMSelection::visibleSelection() const
77 return m_frame->selection().selection();
80 static Position anchorPosition(const VisibleSelection& selection)
82 Position anchor = selection.isBaseFirst() ? selection.start() : selection.end();
83 return anchor.parentAnchoredEquivalent();
86 static Position focusPosition(const VisibleSelection& selection)
88 Position focus = selection.isBaseFirst() ? selection.end() : selection.start();
89 return focus.parentAnchoredEquivalent();
92 static Position basePosition(const VisibleSelection& selection)
94 return selection.base().parentAnchoredEquivalent();
97 static Position extentPosition(const VisibleSelection& selection)
99 return selection.extent().parentAnchoredEquivalent();
102 Node* DOMSelection::anchorNode() const
107 return shadowAdjustedNode(anchorPosition(visibleSelection()));
110 int DOMSelection::anchorOffset() const
115 return shadowAdjustedOffset(anchorPosition(visibleSelection()));
118 Node* DOMSelection::focusNode() const
123 return shadowAdjustedNode(focusPosition(visibleSelection()));
126 int DOMSelection::focusOffset() const
131 return shadowAdjustedOffset(focusPosition(visibleSelection()));
134 Node* DOMSelection::baseNode() const
139 return shadowAdjustedNode(basePosition(visibleSelection()));
142 int DOMSelection::baseOffset() const
147 return shadowAdjustedOffset(basePosition(visibleSelection()));
150 Node* DOMSelection::extentNode() const
155 return shadowAdjustedNode(extentPosition(visibleSelection()));
158 int DOMSelection::extentOffset() const
163 return shadowAdjustedOffset(extentPosition(visibleSelection()));
166 bool DOMSelection::isCollapsed() const
168 if (!m_frame || selectionShadowAncestor(m_frame))
170 return !m_frame->selection().isRange();
173 String DOMSelection::type() const
178 FrameSelection& selection = m_frame->selection();
180 // This is a WebKit DOM extension, incompatible with an IE extension
181 // IE has this same attribute, but returns "none", "text" and "control"
182 // http://msdn.microsoft.com/en-us/library/ms534692(VS.85).aspx
183 if (selection.isNone())
185 if (selection.isCaret())
190 int DOMSelection::rangeCount() const
194 return m_frame->selection().isNone() ? 0 : 1;
197 void DOMSelection::collapse(Node* node, int offset, ExceptionState& exceptionState)
203 m_frame->selection().clear();
208 exceptionState.throwDOMException(IndexSizeError, String::number(offset) + " is not a valid offset.");
212 if (!isValidForPosition(node))
214 RefPtrWillBeRawPtr<Range> range = Range::create(node->document());
215 range->setStart(node, offset, exceptionState);
216 if (exceptionState.hadException())
218 range->setEnd(node, offset, exceptionState);
219 if (exceptionState.hadException())
221 m_frame->selection().setSelectedRange(range.get(), DOWNSTREAM, m_frame->selection().isDirectional() ? FrameSelection::Directional : FrameSelection::NonDirectional);
224 void DOMSelection::collapseToEnd(ExceptionState& exceptionState)
229 const VisibleSelection& selection = m_frame->selection().selection();
231 if (selection.isNone()) {
232 exceptionState.throwDOMException(InvalidStateError, "there is no selection.");
236 m_frame->selection().moveTo(VisiblePosition(selection.end(), DOWNSTREAM));
239 void DOMSelection::collapseToStart(ExceptionState& exceptionState)
244 const VisibleSelection& selection = m_frame->selection().selection();
246 if (selection.isNone()) {
247 exceptionState.throwDOMException(InvalidStateError, "there is no selection.");
251 m_frame->selection().moveTo(VisiblePosition(selection.start(), DOWNSTREAM));
254 void DOMSelection::empty()
258 m_frame->selection().clear();
261 void DOMSelection::setBaseAndExtent(Node* baseNode, int baseOffset, Node* extentNode, int extentOffset, ExceptionState& exceptionState)
266 if (baseOffset < 0) {
267 exceptionState.throwDOMException(IndexSizeError, String::number(baseOffset) + " is not a valid base offset.");
271 if (extentOffset < 0) {
272 exceptionState.throwDOMException(IndexSizeError, String::number(extentOffset) + " is not a valid extent offset.");
276 if (!isValidForPosition(baseNode) || !isValidForPosition(extentNode))
279 // FIXME: Eliminate legacy editing positions
280 VisiblePosition visibleBase = VisiblePosition(createLegacyEditingPosition(baseNode, baseOffset), DOWNSTREAM);
281 VisiblePosition visibleExtent = VisiblePosition(createLegacyEditingPosition(extentNode, extentOffset), DOWNSTREAM);
283 m_frame->selection().moveTo(visibleBase, visibleExtent);
286 void DOMSelection::modify(const String& alterString, const String& directionString, const String& granularityString)
291 FrameSelection::EAlteration alter;
292 if (equalIgnoringCase(alterString, "extend"))
293 alter = FrameSelection::AlterationExtend;
294 else if (equalIgnoringCase(alterString, "move"))
295 alter = FrameSelection::AlterationMove;
299 SelectionDirection direction;
300 if (equalIgnoringCase(directionString, "forward"))
301 direction = DirectionForward;
302 else if (equalIgnoringCase(directionString, "backward"))
303 direction = DirectionBackward;
304 else if (equalIgnoringCase(directionString, "left"))
305 direction = DirectionLeft;
306 else if (equalIgnoringCase(directionString, "right"))
307 direction = DirectionRight;
311 TextGranularity granularity;
312 if (equalIgnoringCase(granularityString, "character"))
313 granularity = CharacterGranularity;
314 else if (equalIgnoringCase(granularityString, "word"))
315 granularity = WordGranularity;
316 else if (equalIgnoringCase(granularityString, "sentence"))
317 granularity = SentenceGranularity;
318 else if (equalIgnoringCase(granularityString, "line"))
319 granularity = LineGranularity;
320 else if (equalIgnoringCase(granularityString, "paragraph"))
321 granularity = ParagraphGranularity;
322 else if (equalIgnoringCase(granularityString, "lineboundary"))
323 granularity = LineBoundary;
324 else if (equalIgnoringCase(granularityString, "sentenceboundary"))
325 granularity = SentenceBoundary;
326 else if (equalIgnoringCase(granularityString, "paragraphboundary"))
327 granularity = ParagraphBoundary;
328 else if (equalIgnoringCase(granularityString, "documentboundary"))
329 granularity = DocumentBoundary;
333 m_frame->selection().modify(alter, direction, granularity);
336 void DOMSelection::extend(Node* node, int offset, ExceptionState& exceptionState)
344 exceptionState.throwDOMException(IndexSizeError, String::number(offset) + " is not a valid offset.");
347 if (offset > (node->offsetInCharacters() ? caretMaxOffset(node) : (int)node->countChildren())) {
348 exceptionState.throwDOMException(IndexSizeError, String::number(offset) + " is larger than the given node's length.");
352 if (!isValidForPosition(node))
355 // FIXME: Eliminate legacy editing positions
356 m_frame->selection().setExtent(VisiblePosition(createLegacyEditingPosition(node, offset), DOWNSTREAM));
359 PassRefPtrWillBeRawPtr<Range> DOMSelection::getRangeAt(int index, ExceptionState& exceptionState)
364 if (index < 0 || index >= rangeCount()) {
365 exceptionState.throwDOMException(IndexSizeError, String::number(index) + " is not a valid index.");
369 // If you're hitting this, you've added broken multi-range selection support
370 ASSERT(rangeCount() == 1);
372 if (Node* shadowAncestor = selectionShadowAncestor(m_frame)) {
373 ASSERT(!shadowAncestor->isShadowRoot());
374 ContainerNode* container = shadowAncestor->parentOrShadowHostNode();
375 int offset = shadowAncestor->nodeIndex();
376 return Range::create(shadowAncestor->document(), container, offset, container, offset);
379 return m_frame->selection().firstRange();
382 void DOMSelection::removeAllRanges()
386 m_frame->selection().clear();
389 void DOMSelection::addRange(Range* newRange)
394 // FIXME: Should we throw DOMException for error cases below?
396 addConsoleError("The given range is null.");
400 if (!newRange->startContainer()) {
401 addConsoleError("The given range has no container. Perhaps 'detach()' has been invoked on it?");
405 FrameSelection& selection = m_frame->selection();
407 if (selection.isNone()) {
408 selection.setSelectedRange(newRange, VP_DEFAULT_AFFINITY);
412 RefPtrWillBeRawPtr<Range> originalRange = selection.firstRange();
414 if (originalRange->startContainer()->document() != newRange->startContainer()->document()) {
415 addConsoleError("The given range does not belong to the current selection's document.");
418 if (originalRange->startContainer()->treeScope() != newRange->startContainer()->treeScope()) {
419 addConsoleError("The given range and the current selection belong to two different document fragments.");
423 if (originalRange->compareBoundaryPoints(Range::START_TO_END, newRange, ASSERT_NO_EXCEPTION) < 0
424 || newRange->compareBoundaryPoints(Range::START_TO_END, originalRange.get(), ASSERT_NO_EXCEPTION) < 0) {
425 addConsoleError("Discontiguous selection is not supported.");
429 // FIXME: "Merge the ranges if they intersect" is Blink-specific behavior; other browsers supporting discontiguous
430 // selection (obviously) keep each Range added and return it in getRangeAt(). But it's unclear if we can really
431 // do the same, since we don't support discontiguous selection. Further discussions at
432 // <https://code.google.com/p/chromium/issues/detail?id=353069>.
434 Range* start = originalRange->compareBoundaryPoints(Range::START_TO_START, newRange, ASSERT_NO_EXCEPTION) < 0 ? originalRange.get() : newRange;
435 Range* end = originalRange->compareBoundaryPoints(Range::END_TO_END, newRange, ASSERT_NO_EXCEPTION) < 0 ? newRange : originalRange.get();
436 RefPtrWillBeRawPtr<Range> merged = Range::create(originalRange->startContainer()->document(), start->startContainer(), start->startOffset(), end->endContainer(), end->endOffset());
437 EAffinity affinity = selection.selection().affinity();
438 selection.setSelectedRange(merged.get(), affinity);
441 void DOMSelection::deleteFromDocument()
446 FrameSelection& selection = m_frame->selection();
448 if (selection.isNone())
451 RefPtrWillBeRawPtr<Range> selectedRange = selection.selection().toNormalizedRange();
455 selectedRange->deleteContents(ASSERT_NO_EXCEPTION);
457 setBaseAndExtent(selectedRange->startContainer(), selectedRange->startOffset(), selectedRange->startContainer(), selectedRange->startOffset(), ASSERT_NO_EXCEPTION);
460 bool DOMSelection::containsNode(const Node* n, bool allowPartial) const
465 FrameSelection& selection = m_frame->selection();
467 if (!n || m_frame->document() != n->document() || selection.isNone())
470 unsigned nodeIndex = n->nodeIndex();
471 RefPtrWillBeRawPtr<Range> selectedRange = selection.selection().toNormalizedRange();
473 ContainerNode* parentNode = n->parentNode();
477 TrackExceptionState exceptionState;
478 bool nodeFullySelected = Range::compareBoundaryPoints(parentNode, nodeIndex, selectedRange->startContainer(), selectedRange->startOffset(), exceptionState) >= 0 && !exceptionState.hadException()
479 && Range::compareBoundaryPoints(parentNode, nodeIndex + 1, selectedRange->endContainer(), selectedRange->endOffset(), exceptionState) <= 0 && !exceptionState.hadException();
480 if (exceptionState.hadException())
482 if (nodeFullySelected)
485 bool nodeFullyUnselected = (Range::compareBoundaryPoints(parentNode, nodeIndex, selectedRange->endContainer(), selectedRange->endOffset(), exceptionState) > 0 && !exceptionState.hadException())
486 || (Range::compareBoundaryPoints(parentNode, nodeIndex + 1, selectedRange->startContainer(), selectedRange->startOffset(), exceptionState) < 0 && !exceptionState.hadException());
487 ASSERT(!exceptionState.hadException());
488 if (nodeFullyUnselected)
491 return allowPartial || n->isTextNode();
494 void DOMSelection::selectAllChildren(Node* n, ExceptionState& exceptionState)
499 // This doesn't (and shouldn't) select text node characters.
500 setBaseAndExtent(n, 0, n, n->countChildren(), exceptionState);
503 String DOMSelection::toString()
509 if (m_frame->selection().selection().toNormalizedPositions(start, end))
510 return plainText(start, end);
511 return emptyString();
514 Node* DOMSelection::shadowAdjustedNode(const Position& position) const
516 if (position.isNull())
519 Node* containerNode = position.containerNode();
520 Node* adjustedNode = m_treeScope->ancestorInThisScope(containerNode);
525 if (containerNode == adjustedNode)
526 return containerNode;
528 ASSERT(!adjustedNode->isShadowRoot());
529 return adjustedNode->parentOrShadowHostNode();
532 int DOMSelection::shadowAdjustedOffset(const Position& position) const
534 if (position.isNull())
537 Node* containerNode = position.containerNode();
538 Node* adjustedNode = m_treeScope->ancestorInThisScope(containerNode);
543 if (containerNode == adjustedNode)
544 return position.computeOffsetInContainerNode();
546 return adjustedNode->nodeIndex();
549 bool DOMSelection::isValidForPosition(Node* node) const
554 return node->document() == m_frame->document();
557 void DOMSelection::addConsoleError(const String& message)
560 m_treeScope->document().addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message));
563 void DOMSelection::trace(Visitor* visitor)
565 visitor->trace(m_treeScope);
566 DOMWindowProperty::trace(visitor);