InsertParagraphSeparatorCommand.cpp [plain text]
#include "config.h"
#include "InsertParagraphSeparatorCommand.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSMutableStyleDeclaration.h"
#include "CSSPropertyNames.h"
#include "Document.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "InsertLineBreakCommand.h"
#include "Logging.h"
#include "RenderObject.h"
#include "Text.h"
#include "htmlediting.h"
#include "visible_units.h"
#include "ApplyStyleCommand.h"
namespace WebCore {
using namespace HTMLNames;
InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(Document *document, bool mustUseDefaultParagraphElement)
: CompositeEditCommand(document)
, m_mustUseDefaultParagraphElement(mustUseDefaultParagraphElement)
{
}
bool InsertParagraphSeparatorCommand::preservesTypingStyle() const
{
return true;
}
void InsertParagraphSeparatorCommand::calculateStyleBeforeInsertion(const Position &pos)
{
VisiblePosition visiblePos(pos, VP_DEFAULT_AFFINITY);
if (!isStartOfParagraph(visiblePos) && !isEndOfParagraph(visiblePos))
return;
m_style = editingStyleAtPosition(pos, IncludeTypingStyle);
}
void InsertParagraphSeparatorCommand::applyStyleAfterInsertion(Node* originalEnclosingBlock)
{
if (originalEnclosingBlock->hasTagName(h1Tag) ||
originalEnclosingBlock->hasTagName(h2Tag) ||
originalEnclosingBlock->hasTagName(h3Tag) ||
originalEnclosingBlock->hasTagName(h4Tag) ||
originalEnclosingBlock->hasTagName(h5Tag))
return;
if (!m_style)
return;
prepareEditingStyleToApplyAt(m_style.get(), endingSelection().start());
if (m_style->length() > 0)
applyStyle(m_style.get());
}
bool InsertParagraphSeparatorCommand::shouldUseDefaultParagraphElement(Node* enclosingBlock) const
{
if (m_mustUseDefaultParagraphElement)
return true;
if (!isEndOfBlock(endingSelection().visibleStart()))
return false;
return enclosingBlock->hasTagName(h1Tag) ||
enclosingBlock->hasTagName(h2Tag) ||
enclosingBlock->hasTagName(h3Tag) ||
enclosingBlock->hasTagName(h4Tag) ||
enclosingBlock->hasTagName(h5Tag);
}
void InsertParagraphSeparatorCommand::getAncestorsInsideBlock(const Node* insertionNode, Element* outerBlock, Vector<Element*>& ancestors)
{
ancestors.clear();
if (insertionNode != outerBlock) {
for (Element* n = insertionNode->parentElement(); n && n != outerBlock; n = n->parentElement())
ancestors.append(n);
}
}
PassRefPtr<Element> InsertParagraphSeparatorCommand::cloneHierarchyUnderNewBlock(const Vector<Element*>& ancestors, PassRefPtr<Element> blockToInsert)
{
RefPtr<Element> parent = blockToInsert;
for (size_t i = ancestors.size(); i != 0; --i) {
RefPtr<Element> child = ancestors[i - 1]->cloneElementWithoutChildren();
appendNode(child, parent);
parent = child.release();
}
return parent.release();
}
void InsertParagraphSeparatorCommand::doApply()
{
bool splitText = false;
if (endingSelection().isNone())
return;
Position insertionPosition = endingSelection().start();
EAffinity affinity = endingSelection().affinity();
if (endingSelection().isRange()) {
calculateStyleBeforeInsertion(insertionPosition);
deleteSelection(false, true);
insertionPosition = endingSelection().start();
affinity = endingSelection().affinity();
}
Node* startBlockNode = enclosingBlock(rangeCompliantEquivalent(insertionPosition).node());
Position canonicalPos = VisiblePosition(insertionPosition).deepEquivalent();
Element* startBlock = static_cast<Element*>(startBlockNode);
if (!startBlockNode
|| !startBlockNode->isElementNode()
|| !startBlock->parentNode()
|| isTableCell(startBlock)
|| startBlock->hasTagName(formTag)
|| (canonicalPos.node()->renderer() && canonicalPos.node()->renderer()->isTable())
|| canonicalPos.node()->hasTagName(hrTag)) {
applyCommandToComposite(InsertLineBreakCommand::create(document()));
return;
}
insertionPosition = insertionPosition.upstream();
if (!insertionPosition.isCandidate())
insertionPosition = insertionPosition.downstream();
insertionPosition = positionAvoidingSpecialElementBoundary(insertionPosition);
VisiblePosition visiblePos(insertionPosition, affinity);
calculateStyleBeforeInsertion(insertionPosition);
if (breakOutOfEmptyListItem())
return;
bool isFirstInBlock = isStartOfBlock(visiblePos);
bool isLastInBlock = isEndOfBlock(visiblePos);
bool nestNewBlock = false;
RefPtr<Element> blockToInsert;
if (startBlock == startBlock->rootEditableElement()) {
blockToInsert = createDefaultParagraphElement(document());
nestNewBlock = true;
} else if (shouldUseDefaultParagraphElement(startBlock))
blockToInsert = createDefaultParagraphElement(document());
else
blockToInsert = startBlock->cloneElementWithoutChildren();
if (isLastInBlock) {
bool shouldApplyStyleAfterInsertion = true;
if (nestNewBlock) {
if (isFirstInBlock && !lineBreakExistsAtVisiblePosition(visiblePos)) {
RefPtr<Element> extraBlock = createDefaultParagraphElement(document());
appendNode(extraBlock, startBlock);
appendBlockPlaceholder(extraBlock);
}
appendNode(blockToInsert, startBlock);
} else {
if (Node* highestBlockquote = highestEnclosingNodeOfType(canonicalPos, &isMailBlockquote)) {
startBlock = static_cast<Element*>(highestBlockquote);
shouldApplyStyleAfterInsertion = false;
}
insertNodeAfter(blockToInsert, startBlock);
}
Vector<Element*> ancestors;
getAncestorsInsideBlock(insertionPosition.node(), startBlock, ancestors);
RefPtr<Element> parent = cloneHierarchyUnderNewBlock(ancestors, blockToInsert);
appendBlockPlaceholder(parent);
setEndingSelection(VisibleSelection(Position(parent.get(), 0), DOWNSTREAM));
return;
}
if (isFirstInBlock || !inSameBlock(visiblePos, visiblePos.previous())) {
Node *refNode;
if (isFirstInBlock && !nestNewBlock)
refNode = startBlock;
else if (insertionPosition.node() == startBlock && nestNewBlock) {
refNode = startBlock->childNode(insertionPosition.deprecatedEditingOffset());
ASSERT(refNode); } else
refNode = insertionPosition.node();
insertionPosition = insertionPosition.downstream();
insertNodeBefore(blockToInsert, refNode);
Vector<Element*> ancestors;
getAncestorsInsideBlock(positionAvoidingSpecialElementBoundary(insertionPosition).node(), startBlock, ancestors);
appendBlockPlaceholder(cloneHierarchyUnderNewBlock(ancestors, blockToInsert));
setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM));
return;
}
if (isStartOfParagraph(visiblePos)) {
RefPtr<Element> br = createBreakElement(document());
insertNodeAt(br.get(), insertionPosition);
insertionPosition = positionInParentAfterNode(br.get());
}
insertionPosition = insertionPosition.downstream();
insertionPosition = VisiblePosition(insertionPosition).deepEquivalent();
Vector<Element*> ancestors;
getAncestorsInsideBlock(insertionPosition.node(), startBlock, ancestors);
Position leadingWhitespace = insertionPosition.leadingWhitespacePosition(VP_DEFAULT_AFFINITY);
if (leadingWhitespace.isNotNull()) {
Text* textNode = static_cast<Text*>(leadingWhitespace.node());
ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace());
replaceTextInNode(textNode, leadingWhitespace.deprecatedEditingOffset(), 1, nonBreakingSpaceString());
}
if (insertionPosition.node()->isTextNode()) {
Text* textNode = static_cast<Text*>(insertionPosition.node());
bool atEnd = (unsigned)insertionPosition.deprecatedEditingOffset() >= textNode->length();
if (insertionPosition.deprecatedEditingOffset() > 0 && !atEnd) {
splitTextNode(textNode, insertionPosition.deprecatedEditingOffset());
insertionPosition.moveToOffset(0);
visiblePos = VisiblePosition(insertionPosition);
splitText = true;
}
}
if (nestNewBlock)
appendNode(blockToInsert.get(), startBlock);
else
insertNodeAfter(blockToInsert.get(), startBlock);
updateLayout();
RefPtr<Element> parent = cloneHierarchyUnderNewBlock(ancestors, blockToInsert);
if (isEndOfParagraph(visiblePos) && !lineBreakExistsAtVisiblePosition(visiblePos))
appendNode(createBreakElement(document()).get(), blockToInsert.get());
if (insertionPosition.node() != startBlock) {
Node* n = insertionPosition.node();
if (insertionPosition.deprecatedEditingOffset() >= caretMaxOffset(n))
n = n->nextSibling();
while (n && n != blockToInsert) {
Node *next = n->nextSibling();
removeNode(n);
appendNode(n, parent.get());
n = next;
}
}
if (!ancestors.isEmpty()) {
Element* leftParent = ancestors.first();
while (leftParent && leftParent != startBlock) {
parent = parent->parentElement();
if (!parent)
break;
Node* n = leftParent->nextSibling();
while (n && n != blockToInsert) {
Node* next = n->nextSibling();
removeNode(n);
appendNode(n, parent.get());
n = next;
}
leftParent = leftParent->parentElement();
}
}
if (splitText) {
updateLayout();
insertionPosition = Position(insertionPosition.node(), 0);
if (!insertionPosition.isRenderedCharacter()) {
ASSERT(insertionPosition.node()->isTextNode());
ASSERT(!insertionPosition.node()->renderer() || insertionPosition.node()->renderer()->style()->collapseWhiteSpace());
deleteInsignificantTextDownstream(insertionPosition);
insertTextIntoNode(static_cast<Text*>(insertionPosition.node()), 0, nonBreakingSpaceString());
}
}
setEndingSelection(VisibleSelection(Position(blockToInsert.get(), 0), DOWNSTREAM));
applyStyleAfterInsertion(startBlock);
}
}