static int indexForPosition(HTMLElement* innerEditor, const Position& passedPosition)
{
if (!innerEditor || !innerEditor->contains(passedPosition.anchorNode()) || passedPosition.isNull())
return 0;
if (positionBeforeNode(innerEditor) == passedPosition)
return 0;
int index = 0;
Node* startNode = passedPosition.computeNodeBeforePosition();
if (!startNode)
startNode = passedPosition.computeContainerNode();
ASSERT(startNode);
ASSERT(innerEditor->contains(startNode));
for (Node* node = startNode; node; node = NodeTraversal::previous(*node, innerEditor)) {
if (node->isTextNode()) {
int length = toText(*node).length();
if (node == passedPosition.computeContainerNode())
index += std::min(length, passedPosition.offsetInContainerNode());
else
index += length;
} else if (node->hasTagName(brTag)) {
++index;
}
}
ASSERT(index >= 0);
return index;
}
static Position positionForIndex(HTMLElement* innerEditor, int index)
{
ASSERT(index >= 0);
if (index == 0) {
Node* node = NodeTraversal::next(*innerEditor, innerEditor);
if (node && node->isTextNode())
return Position(node, 0);
return Position(innerEditor, 0);
}
int remainingCharactersToMoveForward = index;
Node* lastBrOrText = innerEditor;
for (Node& node : NodeTraversal::descendantsOf(*innerEditor)) {
ASSERT(remainingCharactersToMoveForward >= 0);
if (node.hasTagName(brTag)) {
if (remainingCharactersToMoveForward == 0)
return positionBeforeNode(&node);
--remainingCharactersToMoveForward;
lastBrOrText = &node;
continue;
}
if (node.isTextNode()) {
Text& text = toText(node);
if (remainingCharactersToMoveForward < static_cast<int>(text.length()))
return Position(&text, remainingCharactersToMoveForward);
remainingCharactersToMoveForward -= text.length();
lastBrOrText = &node;
continue;
}
ASSERT_NOT_REACHED();
}
return lastPositionInOrAfterNode(lastBrOrText);
}
static Position adjustPositionForStart(const Position& currentPosition, Node* endContainerNode)
{
TreeScope& treeScope = endContainerNode->treeScope();
ASSERT(¤tPosition.containerNode()->treeScope() != &treeScope);
if (Node* ancestor = treeScope.ancestorInThisScope(currentPosition.containerNode())) {
if (ancestor->contains(endContainerNode))
return positionBeforeNode(ancestor);
return positionAfterNode(ancestor);
}
if (Node* firstChild = treeScope.rootNode().firstChild())
return positionBeforeNode(firstChild);
return Position();
}
static Position adjustPositionForEnd(const Position& currentPosition, Node* startContainerNode)
{
TreeScope& treeScope = startContainerNode->treeScope();
ASSERT(currentPosition.containerNode()->treeScope() != treeScope);
if (Node* ancestor = treeScope.ancestorInThisScope(currentPosition.containerNode())) {
if (ancestor->contains(startContainerNode))
return positionAfterNode(ancestor);
return positionBeforeNode(ancestor);
}
if (Node* lastChild = treeScope.rootNode().lastChild())
return positionAfterNode(lastChild);
return Position();
}
void CreateLinkCommand::doApply()
{
if (endingSelection().isNone())
return;
RefPtr<HTMLAnchorElement> anchorElement = new HTMLAnchorElement(document());
anchorElement->setHref(m_url);
if (endingSelection().isRange()) {
pushPartiallySelectedAnchorElementsDown();
applyStyledElement(anchorElement.get());
} else {
insertNodeAt(anchorElement.get(), endingSelection().start());
RefPtr<Text> textNode = new Text(document(), m_url);
appendNode(textNode.get(), anchorElement.get());
setEndingSelection(Selection(positionBeforeNode(anchorElement.get()), positionAfterNode(anchorElement.get()), DOWNSTREAM));
}
}
static Position positionForIndex(TextControlInnerTextElement* innerText, unsigned index)
{
unsigned remainingCharactersToMoveForward = index;
Node* lastBrOrText = innerText;
for (Node* node = innerText; node; node = NodeTraversal::next(*node, innerText)) {
if (node->hasTagName(brTag)) {
if (!remainingCharactersToMoveForward)
return positionBeforeNode(node);
remainingCharactersToMoveForward--;
lastBrOrText = node;
} else if (is<Text>(*node)) {
Text& text = downcast<Text>(*node);
if (remainingCharactersToMoveForward < text.length())
return Position(&text, remainingCharactersToMoveForward);
remainingCharactersToMoveForward -= text.length();
lastBrOrText = node;
}
}
return lastPositionInOrAfterNode(lastBrOrText);
}
void VisibleSelection::adjustSelectionToAvoidCrossingShadowBoundaries()
{
if (m_base.isNull() || m_start.isNull() || m_end.isNull())
return;
Node* startRootNode = m_start.anchorNode()->shadowTreeRootNode();
Node* endRootNode = m_end.anchorNode()->shadowTreeRootNode();
if (!startRootNode && !endRootNode)
return;
if (startRootNode == endRootNode)
return;
if (m_baseIsFirst) {
m_extent = startRootNode ? lastPositionInNode(startRootNode) : positionBeforeNode(endRootNode->shadowHost());
m_end = m_extent;
} else {
m_extent = endRootNode ? firstPositionInNode(endRootNode) : positionAfterNode(startRootNode->shadowHost());
m_start = m_extent;
}
}
unsigned HTMLTextFormControlElement::indexForPosition(const Position& passedPosition) const
{
TextControlInnerTextElement* innerText = innerTextElement();
if (!innerText || !innerText->contains(passedPosition.anchorNode()) || passedPosition.isNull())
return 0;
if (positionBeforeNode(innerText) == passedPosition)
return 0;
unsigned index = 0;
Node* startNode = passedPosition.computeNodeBeforePosition();
if (!startNode)
startNode = passedPosition.containerNode();
ASSERT(startNode);
ASSERT(innerText->contains(startNode));
for (Node* node = startNode; node; node = NodeTraversal::previous(*node, innerText)) {
if (is<Text>(*node)) {
unsigned length = downcast<Text>(*node).length();
if (node == passedPosition.containerNode())
index += std::min<unsigned>(length, passedPosition.offsetInContainerNode());
else
index += length;
} else if (is<HTMLBRElement>(*node))
++index;
}
unsigned length = innerTextValue().length();
index = std::min(index, length); // FIXME: We shouldn't have to call innerTextValue() just to ignore the last LF. See finishText.
#ifndef ASSERT_DISABLED
VisiblePosition visiblePosition = passedPosition;
unsigned indexComputedByVisiblePosition = 0;
if (visiblePosition.isNotNull())
indexComputedByVisiblePosition = WebCore::indexForVisiblePosition(innerText, visiblePosition, false /* forSelectionPreservation */);
ASSERT(index == indexComputedByVisiblePosition);
#endif
return index;
}
Position toPositionInDOMTree(const PositionInComposedTree& position)
{
if (position.isNull())
return Position();
Node* anchorNode = position.anchorNode();
switch (position.anchorType()) {
case PositionAnchorType::AfterChildren:
// FIXME: When anchorNode is <img>, assertion fails in the constructor.
return Position(anchorNode, PositionAnchorType::AfterChildren);
case PositionAnchorType::AfterAnchor:
return positionAfterNode(anchorNode);
case PositionAnchorType::BeforeChildren:
return Position(anchorNode, PositionAnchorType::BeforeChildren);
case PositionAnchorType::BeforeAnchor:
return positionBeforeNode(anchorNode);
case PositionAnchorType::OffsetInAnchor: {
int offset = position.offsetInContainerNode();
if (anchorNode->offsetInCharacters())
return Position(anchorNode, offset);
Node* child = ComposedTreeTraversal::childAt(*anchorNode, offset);
if (child)
return Position(child->parentNode(), child->nodeIndex());
if (!position.offsetInContainerNode())
return Position(anchorNode, PositionAnchorType::BeforeChildren);
// |child| is null when the position is at the end of the children.
// <div>foo|</div>
return Position(anchorNode, PositionAnchorType::AfterChildren);
}
default:
ASSERT_NOT_REACHED();
return Position();
}
}
void VisibleSelection::adjustSelectionToAvoidCrossingEditingBoundaries()
{
if (m_base.isNull() || m_start.isNull() || m_end.isNull())
return;
// Early return in the caret case (the state hasn't actually been set yet, so we can't use isCaret()) to avoid the
// expense of computing highestEditableRoot.
if (m_base == m_start && m_base == m_end)
return;
Node* baseRoot = highestEditableRoot(m_base);
Node* startRoot = highestEditableRoot(m_start);
Node* endRoot = highestEditableRoot(m_end);
Node* baseEditableAncestor = lowestEditableAncestor(m_base.containerNode());
// The base, start and end are all in the same region. No adjustment necessary.
if (baseRoot == startRoot && baseRoot == endRoot)
return;
// The selection is based in editable content.
if (baseRoot) {
// If the start is outside the base's editable root, cap it at the start of that root.
// If the start is in non-editable content that is inside the base's editable root, put it
// at the first editable position after start inside the base's editable root.
if (startRoot != baseRoot) {
VisiblePosition first = firstEditablePositionAfterPositionInRoot(m_start, baseRoot);
m_start = first.deepEquivalent();
if (m_start.isNull()) {
ASSERT_NOT_REACHED();
m_start = m_end;
}
}
// If the end is outside the base's editable root, cap it at the end of that root.
// If the end is in non-editable content that is inside the base's root, put it
// at the last editable position before the end inside the base's root.
if (endRoot != baseRoot) {
VisiblePosition last = lastEditablePositionBeforePositionInRoot(m_end, baseRoot);
m_end = last.deepEquivalent();
if (m_end.isNull())
m_end = m_start;
}
// The selection is based in non-editable content.
} else {
// FIXME: Non-editable pieces inside editable content should be atomic, in the same way that editable
// pieces in non-editable content are atomic.
// The selection ends in editable content or non-editable content inside a different editable ancestor,
// move backward until non-editable content inside the same lowest editable ancestor is reached.
Node* endEditableAncestor = lowestEditableAncestor(m_end.containerNode());
if (endRoot || endEditableAncestor != baseEditableAncestor) {
Position p = previousVisuallyDistinctCandidate(m_end);
Node* shadowAncestor = endRoot ? endRoot->shadowHost() : 0;
if (p.isNull() && shadowAncestor)
p = positionAfterNode(shadowAncestor);
while (p.isNotNull() && !(lowestEditableAncestor(p.containerNode()) == baseEditableAncestor && !isEditablePosition(p))) {
Node* root = editableRootForPosition(p);
shadowAncestor = root ? root->shadowHost() : 0;
p = isAtomicNode(p.containerNode()) ? positionInParentBeforeNode(p.containerNode()) : previousVisuallyDistinctCandidate(p);
if (p.isNull() && shadowAncestor)
p = positionAfterNode(shadowAncestor);
}
VisiblePosition previous(p);
if (previous.isNull()) {
// The selection crosses an Editing boundary. This is a
// programmer error in the editing code. Happy debugging!
ASSERT_NOT_REACHED();
m_base = Position();
m_extent = Position();
validate();
return;
}
m_end = previous.deepEquivalent();
}
// The selection starts in editable content or non-editable content inside a different editable ancestor,
// move forward until non-editable content inside the same lowest editable ancestor is reached.
Node* startEditableAncestor = lowestEditableAncestor(m_start.containerNode());
if (startRoot || startEditableAncestor != baseEditableAncestor) {
Position p = nextVisuallyDistinctCandidate(m_start);
Node* shadowAncestor = startRoot ? startRoot->shadowHost() : 0;
if (p.isNull() && shadowAncestor)
p = positionBeforeNode(shadowAncestor);
while (p.isNotNull() && !(lowestEditableAncestor(p.containerNode()) == baseEditableAncestor && !isEditablePosition(p))) {
Node* root = editableRootForPosition(p);
shadowAncestor = root ? root->shadowHost() : 0;
p = isAtomicNode(p.containerNode()) ? positionInParentAfterNode(p.containerNode()) : nextVisuallyDistinctCandidate(p);
if (p.isNull() && shadowAncestor)
p = positionBeforeNode(shadowAncestor);
}
VisiblePosition next(p);
if (next.isNull()) {
// The selection crosses an Editing boundary. This is a
// programmer error in the editing code. Happy debugging!
ASSERT_NOT_REACHED();
m_base = Position();
m_extent = Position();
validate();
return;
}
m_start = next.deepEquivalent();
}
}
// Correct the extent if necessary.
if (baseEditableAncestor != lowestEditableAncestor(m_extent.containerNode()))
m_extent = m_baseIsFirst ? m_end : m_start;
}
void InsertParagraphSeparatorCommand::doApply()
{
if (!endingSelection().isNonOrphanedCaretOrRange())
return;
Position insertionPosition = endingSelection().start();
EAffinity affinity = endingSelection().affinity();
// Delete the current selection.
if (endingSelection().isRange()) {
calculateStyleBeforeInsertion(insertionPosition);
deleteSelection(false, true);
insertionPosition = endingSelection().start();
affinity = endingSelection().affinity();
}
// FIXME: The parentAnchoredEquivalent conversion needs to be moved into enclosingBlock.
RefPtr<Element> startBlock = enclosingBlock(insertionPosition.parentAnchoredEquivalent().containerNode());
Position canonicalPos = VisiblePosition(insertionPosition).deepEquivalent();
if (!startBlock
|| !startBlock->nonShadowBoundaryParentNode()
// FIXME: If the node is hidden, we don't have a canonical position so we will do the wrong thing for tables and <hr>. https://bugs.webkit.org/show_bug.cgi?id=40342
|| (!canonicalPos.isNull() && isRenderedTableElement(canonicalPos.deprecatedNode()))) {
applyCommandToComposite(InsertLineBreakCommand::create(document()));
return;
}
// Use the leftmost candidate.
insertionPosition = insertionPosition.upstream();
if (!insertionPosition.isCandidate())
insertionPosition = insertionPosition.downstream();
// Adjust the insertion position after the delete
insertionPosition = positionAvoidingSpecialElementBoundary(insertionPosition);
VisiblePosition visiblePos(insertionPosition, affinity);
calculateStyleBeforeInsertion(insertionPosition);
//---------------------------------------------------------------------
// Handle special case of typing return on an empty list item
if (breakOutOfEmptyListItem())
return;
//---------------------------------------------------------------------
// Prepare for more general cases.
bool isFirstInBlock = isStartOfBlock(visiblePos);
bool isLastInBlock = isEndOfBlock(visiblePos);
bool nestNewBlock = false;
// Create block to be inserted.
RefPtr<Element> blockToInsert = nullptr;
if (startBlock->isRootEditableElement()) {
blockToInsert = createDefaultParagraphElement(document());
nestNewBlock = true;
} else if (shouldUseDefaultParagraphElement(startBlock.get())) {
blockToInsert = createDefaultParagraphElement(document());
} else {
blockToInsert = startBlock->cloneElementWithoutChildren();
}
//---------------------------------------------------------------------
// Handle case when position is in the last visible position in its block,
// including when the block is empty.
if (isLastInBlock) {
if (nestNewBlock) {
if (isFirstInBlock && !lineBreakExistsAtVisiblePosition(visiblePos)) {
// The block is empty. Create an empty block to
// represent the paragraph that we're leaving.
RefPtr<HTMLElement> extraBlock = createDefaultParagraphElement(document());
appendNode(extraBlock, startBlock);
}
appendNode(blockToInsert, startBlock);
} else {
// Most of the time we want to stay at the nesting level of the startBlock (e.g., when nesting within lists). However,
// for div nodes, this can result in nested div tags that are hard to break out of.
Element* siblingElement = startBlock.get();
insertNodeAfter(blockToInsert, siblingElement);
}
// Recreate the same structure in the new paragraph.
Vector<RefPtr<Element> > ancestors;
getAncestorsInsideBlock(positionOutsideTabSpan(insertionPosition).deprecatedNode(), startBlock.get(), ancestors);
RefPtr<Element> parent = cloneHierarchyUnderNewBlock(ancestors, blockToInsert);
setEndingSelection(VisibleSelection(firstPositionInNode(parent.get()), DOWNSTREAM, endingSelection().isDirectional()));
return;
}
//---------------------------------------------------------------------
// Handle case when position is in the first visible position in its block, and
// similar case where previous position is in another, presumeably nested, block.
if (isFirstInBlock || !inSameBlock(visiblePos, visiblePos.previous())) {
Node* refNode = 0;
insertionPosition = positionOutsideTabSpan(insertionPosition);
if (isFirstInBlock && !nestNewBlock) {
refNode = startBlock.get();
} else if (isFirstInBlock && nestNewBlock) {
// startBlock should always have children, otherwise isLastInBlock would be true and it's handled above.
ASSERT(startBlock->hasChildren());
refNode = startBlock->firstChild();
}
else if (insertionPosition.deprecatedNode() == startBlock && nestNewBlock) {
refNode = NodeTraversal::childAt(*startBlock, insertionPosition.deprecatedEditingOffset());
ASSERT(refNode); // must be true or we'd be in the end of block case
} else
refNode = insertionPosition.deprecatedNode();
// find ending selection position easily before inserting the paragraph
insertionPosition = insertionPosition.downstream();
if (refNode)
insertNodeBefore(blockToInsert, refNode);
// Recreate the same structure in the new paragraph.
Vector<RefPtr<Element> > ancestors;
getAncestorsInsideBlock(positionAvoidingSpecialElementBoundary(positionOutsideTabSpan(insertionPosition)).deprecatedNode(), startBlock.get(), ancestors);
// In this case, we need to set the new ending selection.
setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM, endingSelection().isDirectional()));
return;
}
//---------------------------------------------------------------------
// Handle the (more complicated) general case,
// Move downstream. Typing style code will take care of carrying along the
// style of the upstream position.
insertionPosition = insertionPosition.downstream();
// At this point, the insertionPosition's node could be a container, and we want to make sure we include
// all of the correct nodes when building the ancestor list. So this needs to be the deepest representation of the position
// before we walk the DOM tree.
insertionPosition = positionOutsideTabSpan(VisiblePosition(insertionPosition).deepEquivalent());
// If the returned position lies either at the end or at the start of an element that is ignored by editing
// we should move to its upstream or downstream position.
if (editingIgnoresContent(insertionPosition.deprecatedNode())) {
if (insertionPosition.atLastEditingPositionForNode())
insertionPosition = insertionPosition.downstream();
else if (insertionPosition.atFirstEditingPositionForNode())
insertionPosition = insertionPosition.upstream();
}
// Make sure we do not cause a rendered space to become unrendered.
// FIXME: We need the affinity for pos, but pos.downstream() does not give it
Position leadingWhitespace = leadingWhitespacePosition(insertionPosition, VP_DEFAULT_AFFINITY);
// FIXME: leadingWhitespacePosition is returning the position before preserved newlines for positions
// after the preserved newline, causing the newline to be turned into a nbsp.
if (leadingWhitespace.isNotNull() && leadingWhitespace.deprecatedNode()->isTextNode()) {
Text* textNode = toText(leadingWhitespace.deprecatedNode());
ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace());
replaceTextInNodePreservingMarkers(textNode, leadingWhitespace.deprecatedEditingOffset(), 1, nonBreakingSpaceString());
}
// Split at pos if in the middle of a text node.
Position positionAfterSplit;
if (insertionPosition.anchorType() == Position::PositionIsOffsetInAnchor && insertionPosition.containerNode()->isTextNode()) {
RefPtr<Text> textNode = toText(insertionPosition.containerNode());
bool atEnd = static_cast<unsigned>(insertionPosition.offsetInContainerNode()) >= textNode->length();
if (insertionPosition.deprecatedEditingOffset() > 0 && !atEnd) {
splitTextNode(textNode, insertionPosition.offsetInContainerNode());
positionAfterSplit = firstPositionInNode(textNode.get());
insertionPosition.moveToPosition(textNode->previousSibling(), insertionPosition.offsetInContainerNode());
visiblePos = VisiblePosition(insertionPosition);
}
}
// If we got detached due to mutation events, just bail out.
if (!startBlock->parentNode())
return;
// Put the added block in the tree.
if (nestNewBlock) {
appendNode(blockToInsert.get(), startBlock);
} else {
insertNodeAfter(blockToInsert.get(), startBlock);
}
document().updateLayoutIgnorePendingStylesheets();
// Move the start node and the siblings of the start node.
if (VisiblePosition(insertionPosition) != VisiblePosition(positionBeforeNode(blockToInsert.get()))) {
Node* n;
if (insertionPosition.containerNode() == startBlock)
n = insertionPosition.computeNodeAfterPosition();
else {
Node* splitTo = insertionPosition.containerNode();
if (splitTo->isTextNode() && insertionPosition.offsetInContainerNode() >= caretMaxOffset(splitTo))
splitTo = NodeTraversal::next(*splitTo, startBlock.get());
ASSERT(splitTo);
splitTreeToNode(splitTo, startBlock.get());
for (n = startBlock->firstChild(); n; n = n->nextSibling()) {
VisiblePosition beforeNodePosition(positionBeforeNode(n));
if (!beforeNodePosition.isNull() && comparePositions(VisiblePosition(insertionPosition), beforeNodePosition) <= 0)
break;
}
}
moveRemainingSiblingsToNewParent(n, blockToInsert.get(), blockToInsert);
}
// Handle whitespace that occurs after the split
if (positionAfterSplit.isNotNull()) {
document().updateLayoutIgnorePendingStylesheets();
if (!positionAfterSplit.isRenderedCharacter()) {
// Clear out all whitespace and insert one non-breaking space
ASSERT(!positionAfterSplit.containerNode()->renderer() || positionAfterSplit.containerNode()->renderer()->style()->collapseWhiteSpace());
deleteInsignificantTextDownstream(positionAfterSplit);
if (positionAfterSplit.deprecatedNode()->isTextNode())
insertTextIntoNode(toText(positionAfterSplit.containerNode()), 0, nonBreakingSpaceString());
}
}
setEndingSelection(VisibleSelection(firstPositionInNode(blockToInsert.get()), DOWNSTREAM, endingSelection().isDirectional()));
}
void Selection::adjustForEditableContent()
{
if (m_base.isNull() || m_start.isNull() || m_end.isNull())
return;
Node* baseRoot = highestEditableRoot(m_base);
Node* startRoot = highestEditableRoot(m_start);
Node* endRoot = highestEditableRoot(m_end);
Node* baseEditableAncestor = lowestEditableAncestor(m_base.node());
// The base, start and end are all in the same region. No adjustment necessary.
if (baseRoot == startRoot && baseRoot == endRoot)
return;
// The selection is based in editable content.
if (baseRoot) {
// If the start is outside the base's editable root, cap it at the start of that root.
// If the start is in non-editable content that is inside the base's editable root, put it
// at the first editable position after start inside the base's editable root.
if (startRoot != baseRoot) {
VisiblePosition first = firstEditablePositionAfterPositionInRoot(m_start, baseRoot);
m_start = first.deepEquivalent();
if (m_start.isNull()) {
ASSERT_NOT_REACHED();
m_start = m_end;
}
}
// If the end is outside the base's editable root, cap it at the end of that root.
// If the end is in non-editable content that is inside the base's root, put it
// at the last editable position before the end inside the base's root.
if (endRoot != baseRoot) {
VisiblePosition last = lastEditablePositionBeforePositionInRoot(m_end, baseRoot);
m_end = last.deepEquivalent();
if (m_end.isNull()) {
ASSERT_NOT_REACHED();
m_end = m_start;
}
}
// The selection is based in non-editable content.
} else {
// FIXME: Non-editable pieces inside editable content should be atomic, in the same way that editable
// pieces in non-editable content are atomic.
// The selection ends in editable content or non-editable content inside a different editable ancestor,
// move backward until non-editable content inside the same lowest editable ancestor is reached.
Node* endEditableAncestor = lowestEditableAncestor(m_end.node());
if (endRoot || endEditableAncestor != baseEditableAncestor) {
Position p = previousVisuallyDistinctCandidate(m_end);
Node* shadowAncestor = endRoot ? endRoot->shadowAncestorNode() : 0;
if (p.isNull() && endRoot && (shadowAncestor != endRoot))
p = Position(shadowAncestor, maxDeepOffset(shadowAncestor));
while (p.isNotNull() && !(lowestEditableAncestor(p.node()) == baseEditableAncestor && !isEditablePosition(p))) {
Node* root = editableRootForPosition(p);
shadowAncestor = root ? root->shadowAncestorNode() : 0;
p = isAtomicNode(p.node()) ? positionBeforeNode(p.node()) : previousVisuallyDistinctCandidate(p);
if (p.isNull() && (shadowAncestor != root))
p = Position(shadowAncestor, maxDeepOffset(shadowAncestor));
}
VisiblePosition previous(p);
if (previous.isNull()) {
ASSERT_NOT_REACHED();
m_base = Position();
m_extent = Position();
validate();
return;
}
m_end = previous.deepEquivalent();
}
// The selection starts in editable content or non-editable content inside a different editable ancestor,
// move forward until non-editable content inside the same lowest editable ancestor is reached.
Node* startEditableAncestor = lowestEditableAncestor(m_start.node());
if (startRoot || startEditableAncestor != baseEditableAncestor) {
Position p = nextVisuallyDistinctCandidate(m_start);
Node* shadowAncestor = startRoot ? startRoot->shadowAncestorNode() : 0;
if (p.isNull() && startRoot && (shadowAncestor != startRoot))
p = Position(shadowAncestor, 0);
while (p.isNotNull() && !(lowestEditableAncestor(p.node()) == baseEditableAncestor && !isEditablePosition(p))) {
Node* root = editableRootForPosition(p);
shadowAncestor = root ? root->shadowAncestorNode() : 0;
p = isAtomicNode(p.node()) ? positionAfterNode(p.node()) : nextVisuallyDistinctCandidate(p);
if (p.isNull() && (shadowAncestor != root))
p = Position(shadowAncestor, 0);
}
VisiblePosition next(p);
if (next.isNull()) {
ASSERT_NOT_REACHED();
m_base = Position();
m_extent = Position();
validate();
return;
}
m_start = next.deepEquivalent();
}
}
// Correct the extent if necessary.
if (baseEditableAncestor != lowestEditableAncestor(m_extent.node()))
m_extent = m_baseIsFirst ? m_end : m_start;
}
static void adjustPositionForUserSelectAll(VisiblePosition& pos, bool isForward)
{
if (Node* rootUserSelectAll = EditingStrategy::rootUserSelectAllForNode(pos.deepEquivalent().anchorNode()))
pos = createVisiblePosition(isForward ? mostForwardCaretPosition(positionAfterNode(rootUserSelectAll), CanCrossEditingBoundary) : mostBackwardCaretPosition(positionBeforeNode(rootUserSelectAll), CanCrossEditingBoundary));
}
void InsertTextCommand::input(const String& originalText, bool selectInsertedText)
{
String text = originalText;
ASSERT(text.find('\n') == -1);
if (endingSelection().isNone())
return;
if (RenderObject* renderer = endingSelection().start().node()->renderer())
if (renderer->style()->collapseWhiteSpace())
// Turn all spaces into non breaking spaces, to make sure that they are treated
// literally, and aren't collapsed after insertion. They will be rebalanced
// (turned into a sequence of regular and non breaking spaces) below.
text.replace(' ', noBreakSpace);
// Delete the current selection.
// FIXME: This delete operation blows away the typing style.
if (endingSelection().isRange()) {
if (performTrivialReplace(text, selectInsertedText))
return;
deleteSelection(false, true, true, false);
}
// Insert the character at the leftmost candidate.
Position startPosition = endingSelection().start().upstream();
// It is possible for the node that contains startPosition to contain only unrendered whitespace,
// and so deleteInsignificantText could remove it. Save the position before the node in case that happens.
Position positionBeforeStartNode(positionBeforeNode(startPosition.node()));
deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
if (!startPosition.node()->inDocument())
startPosition = positionBeforeStartNode;
if (!startPosition.isCandidate())
startPosition = startPosition.downstream();
startPosition = positionAvoidingSpecialElementBoundary(startPosition);
Position endPosition;
if (text == "\t") {
endPosition = insertTab(startPosition);
startPosition = endPosition.previous();
removePlaceholderAt(VisiblePosition(startPosition));
m_charactersAdded += 1;
} else {
// Make sure the document is set up to receive text
startPosition = prepareForTextInsertion(startPosition);
removePlaceholderAt(VisiblePosition(startPosition));
Text *textNode = static_cast<Text *>(startPosition.node());
int offset = startPosition.offset();
insertTextIntoNode(textNode, offset, text);
endPosition = Position(textNode, offset + text.length());
// The insertion may require adjusting adjacent whitespace, if it is present.
rebalanceWhitespaceAt(endPosition);
// Rebalancing on both sides isn't necessary if we've inserted a space.
if (originalText != " ")
rebalanceWhitespaceAt(startPosition);
m_charactersAdded += text.length();
}
// We could have inserted a part of composed character sequence,
// so we are basically treating ending selection as a range to avoid validation.
// <http://bugs.webkit.org/show_bug.cgi?id=15781>
Selection forcedEndingSelection;
forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
setEndingSelection(forcedEndingSelection);
// Handle the case where there is a typing style.
CSSMutableStyleDeclaration* typingStyle = document()->frame()->typingStyle();
RefPtr<CSSComputedStyleDeclaration> endingStyle = endPosition.computedStyle();
RefPtr<CSSValue> unicodeBidi;
RefPtr<CSSValue> direction;
if (typingStyle) {
unicodeBidi = typingStyle->getPropertyCSSValue(CSSPropertyUnicodeBidi);
direction = typingStyle->getPropertyCSSValue(CSSPropertyDirection);
}
endingStyle->diff(typingStyle);
if (typingStyle && unicodeBidi) {
ASSERT(unicodeBidi->isPrimitiveValue());
typingStyle->setProperty(CSSPropertyUnicodeBidi, static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent());
if (direction) {
ASSERT(direction->isPrimitiveValue());
typingStyle->setProperty(CSSPropertyDirection, static_cast<CSSPrimitiveValue*>(direction.get())->getIdent());
}
}
if (typingStyle && typingStyle->length())
applyStyle(typingStyle);
if (!selectInsertedText)
setEndingSelection(Selection(endingSelection().end(), endingSelection().affinity()));
}