InsertTextCommand.cpp [plain text]
#include "config.h"
#include "InsertTextCommand.h"
#include "Document.h"
#include "Element.h"
#include "EditingText.h"
#include "Editor.h"
#include "Frame.h"
#include "HTMLInterchange.h"
#include "htmlediting.h"
#include "visible_units.h"
#include <wtf/unicode/CharacterNames.h>
namespace WebCore {
InsertTextCommand::InsertTextCommand(Document *document)
: CompositeEditCommand(document)
{
}
void InsertTextCommand::doApply()
{
}
Position InsertTextCommand::positionInsideTextNode(const Position& p)
{
Position pos = p;
if (isTabSpanTextNode(pos.anchorNode())) {
RefPtr<Node> textNode = document()->createEditingTextNode("");
insertNodeAtTabSpanPosition(textNode.get(), pos);
return firstPositionInNode(textNode.get());
}
if (!pos.containerNode()->isTextNode()) {
RefPtr<Node> textNode = document()->createEditingTextNode("");
insertNodeAt(textNode.get(), pos);
return firstPositionInNode(textNode.get());
}
return pos;
}
bool InsertTextCommand::performTrivialReplace(const String& text, bool selectInsertedText)
{
if (!endingSelection().isRange())
return false;
if (text.contains('\t') || text.contains(' ') || text.contains('\n'))
return false;
Position start = endingSelection().start().parentAnchoredEquivalent();
Position end = endingSelection().end().parentAnchoredEquivalent();
ASSERT(start.anchorType() == Position::PositionIsOffsetInAnchor);
ASSERT(end.anchorType() == Position::PositionIsOffsetInAnchor);
if (start.containerNode() != end.containerNode() || !start.containerNode()->isTextNode() || isTabSpanTextNode(start.containerNode()))
return false;
replaceTextInNode(static_cast<Text*>(start.containerNode()), start.offsetInContainerNode(), end.offsetInContainerNode() - start.offsetInContainerNode(), text);
Position endPosition(start.containerNode(), start.offsetInContainerNode() + text.length());
VisibleSelection forcedEndingSelection;
forcedEndingSelection.setWithoutValidation(start, endPosition);
setEndingSelection(forcedEndingSelection);
if (!selectInsertedText)
setEndingSelection(VisibleSelection(endingSelection().visibleEnd()));
return true;
}
void InsertTextCommand::input(const String& text, bool selectInsertedText, RebalanceType whitespaceRebalance)
{
ASSERT(text.find('\n') == notFound);
if (!endingSelection().isNonOrphanedCaretOrRange())
return;
if (endingSelection().isRange()) {
if (performTrivialReplace(text, selectInsertedText))
return;
deleteSelection(false, true, true, false);
}
Position startPosition(endingSelection().start());
Position placeholder;
Position downstream(startPosition.downstream());
if (lineBreakExistsAtPosition(downstream)) {
VisiblePosition caret(startPosition);
if (isEndOfBlock(caret) && isStartOfParagraph(caret))
placeholder = downstream;
}
startPosition = startPosition.upstream();
Position positionBeforeStartNode(positionInParentBeforeNode(startPosition.containerNode()));
deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
if (!startPosition.anchorNode()->inDocument())
startPosition = positionBeforeStartNode;
if (!startPosition.isCandidate())
startPosition = startPosition.downstream();
startPosition = positionAvoidingSpecialElementBoundary(startPosition);
Position endPosition;
if (text == "\t") {
endPosition = insertTab(startPosition);
startPosition = endPosition.previous();
if (placeholder.isNotNull())
removePlaceholderAt(placeholder);
} else {
startPosition = positionInsideTextNode(startPosition);
ASSERT(startPosition.anchorType() == Position::PositionIsOffsetInAnchor);
ASSERT(startPosition.containerNode());
ASSERT(startPosition.containerNode()->isTextNode());
if (placeholder.isNotNull())
removePlaceholderAt(placeholder);
Text* textNode = static_cast<Text*>(startPosition.containerNode());
const unsigned offset = startPosition.offsetInContainerNode();
insertTextIntoNode(textNode, offset, text);
endPosition = Position(textNode, offset + text.length(), Position::PositionIsOffsetInAnchor);
if (whitespaceRebalance == RebalanceLeadingAndTrailingWhitespaces) {
rebalanceWhitespaceAt(endPosition);
if (!shouldRebalanceLeadingWhitespaceFor(text))
rebalanceWhitespaceAt(startPosition);
} else {
ASSERT(whitespaceRebalance == RebalanceAllWhitespaces);
if (canRebalance(startPosition) && canRebalance(endPosition))
rebalanceWhitespaceOnTextSubstring(textNode, startPosition.offsetInContainerNode(), endPosition.offsetInContainerNode());
}
}
VisibleSelection forcedEndingSelection;
forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
setEndingSelection(forcedEndingSelection);
if (RefPtr<EditingStyle> typingStyle = document()->frame()->selection()->typingStyle()) {
typingStyle->prepareToApplyAt(endPosition, EditingStyle::PreserveWritingDirection);
if (!typingStyle->isEmpty())
applyStyle(typingStyle.get());
}
if (!selectInsertedText)
setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity()));
}
Position InsertTextCommand::insertTab(const Position& pos)
{
Position insertPos = VisiblePosition(pos, DOWNSTREAM).deepEquivalent();
Node* node = insertPos.deprecatedNode();
unsigned int offset = insertPos.deprecatedEditingOffset();
if (isTabSpanTextNode(node)) {
insertTextIntoNode(static_cast<Text *>(node), offset, "\t");
return Position(node, offset + 1, Position::PositionIsOffsetInAnchor);
}
RefPtr<Element> spanNode = createTabSpanElement(document());
if (!node->isTextNode()) {
insertNodeAt(spanNode.get(), insertPos);
} else {
Text *textNode = static_cast<Text *>(node);
if (offset >= textNode->length()) {
insertNodeAfter(spanNode.get(), textNode);
} else {
if (offset > 0)
splitTextNode(textNode, offset);
insertNodeBefore(spanNode, textNode);
}
}
return lastPositionInNode(spanNode.get());
}
bool InsertTextCommand::isInsertTextCommand() const
{
return true;
}
}