InsertTextCommand.cpp [plain text]
#include "config.h"
#include "InsertTextCommand.h"
#include "CharacterNames.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSMutableStyleDeclaration.h"
#include "CSSPropertyNames.h"
#include "Document.h"
#include "Element.h"
#include "EditingText.h"
#include "Editor.h"
#include "Frame.h"
#include "Logging.h"
#include "HTMLInterchange.h"
#include "htmlediting.h"
#include "TextIterator.h"
#include "TypingCommand.h"
#include "visible_units.h"
namespace WebCore {
InsertTextCommand::InsertTextCommand(Document *document)
: CompositeEditCommand(document), m_charactersAdded(0)
{
}
void InsertTextCommand::doApply()
{
}
Position InsertTextCommand::prepareForTextInsertion(const Position& p)
{
Position pos = p;
if (!pos.node()->isTextNode()) {
RefPtr<Node> textNode = document()->createEditingTextNode("");
insertNodeAt(textNode.get(), pos);
return Position(textNode.get(), 0);
}
if (isTabSpanTextNode(pos.node())) {
RefPtr<Node> textNode = document()->createEditingTextNode("");
insertNodeAtTabSpanPosition(textNode.get(), pos);
return Position(textNode.get(), 0);
}
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();
Position end = endingSelection().end();
if (start.node() != end.node() || !start.node()->isTextNode() || isTabSpanTextNode(start.node()))
return false;
replaceTextInNode(static_cast<Text*>(start.node()), start.offset(), end.offset() - start.offset(), text);
Position endPosition(start.node(), start.offset() + text.length());
Selection forcedEndingSelection;
forcedEndingSelection.setWithoutValidation(start, endPosition);
setEndingSelection(forcedEndingSelection);
if (!selectInsertedText)
setEndingSelection(Selection(endingSelection().visibleEnd()));
return true;
}
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())
text.replace(' ', noBreakSpace);
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(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();
if (placeholder.isNotNull())
removePlaceholderAt(placeholder);
m_charactersAdded += 1;
} else {
startPosition = prepareForTextInsertion(startPosition);
if (placeholder.isNotNull())
removePlaceholderAt(placeholder);
Text *textNode = static_cast<Text *>(startPosition.node());
int offset = startPosition.offset();
insertTextIntoNode(textNode, offset, text);
endPosition = Position(textNode, offset + text.length());
rebalanceWhitespaceAt(endPosition);
if (originalText != " ")
rebalanceWhitespaceAt(startPosition);
m_charactersAdded += text.length();
}
Selection forcedEndingSelection;
forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
setEndingSelection(forcedEndingSelection);
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()));
}
Position InsertTextCommand::insertTab(const Position& pos)
{
Position insertPos = VisiblePosition(pos, DOWNSTREAM).deepEquivalent();
Node *node = insertPos.node();
unsigned int offset = insertPos.offset();
if (isTabSpanTextNode(node)) {
insertTextIntoNode(static_cast<Text *>(node), offset, "\t");
return Position(node, offset + 1);
}
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 Position(spanNode->lastChild(), caretMaxOffset(spanNode->lastChild()));
}
bool InsertTextCommand::isInsertTextCommand() const
{
return true;
}
}