--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/InsertTextCommand.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2005 Apple Computer, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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;
+ // Prepare for text input by looking at the specified position.
+ // It may be necessary to insert a text node to receive characters.
+ 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;
+}
+
+// This avoids the expense of a full fledged delete operation, and avoids a layout that typically results
+// from text removal.
+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.deprecatedEditingOffset(), end.deprecatedEditingOffset() - start.deprecatedEditingOffset(), text);
+
+ Position endPosition(start.node(), start.deprecatedEditingOffset() + 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>
+ VisibleSelection forcedEndingSelection;
+ forcedEndingSelection.setWithoutValidation(start, endPosition);
+ setEndingSelection(forcedEndingSelection);
+
+ if (!selectInsertedText)
+ setEndingSelection(VisibleSelection(endingSelection().visibleEnd()));
+
+ return true;
+}
+
+void InsertTextCommand::input(const String& text, bool selectInsertedText)
+{
+
+ ASSERT(text.find('\n') == -1);
+
+ if (endingSelection().isNone())
+ return;
+
+ // 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);
+ }
+
+ Position startPosition(endingSelection().start());
+
+ Position placeholder;
+ // We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content
+ // is inserted just before them.
+ // FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
+ // If the caret is just before a placeholder, downstream will normalize the caret to it.
+ Position downstream(startPosition.downstream());
+ if (lineBreakExistsAtPosition(downstream)) {
+ // FIXME: This doesn't handle placeholders at the end of anonymous blocks.
+ VisiblePosition caret(startPosition);
+ if (isEndOfBlock(caret) && isStartOfParagraph(caret))
+ placeholder = downstream;
+ // Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
+ // we get a chance to insert into it. We check for a placeholder now, though, because doing so requires
+ // the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
+ }
+
+ // Insert the character at the leftmost candidate.
+ startPosition = startPosition.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(positionInParentBeforeNode(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 {
+ // Make sure the document is set up to receive text
+ startPosition = prepareForTextInsertion(startPosition);
+ if (placeholder.isNotNull())
+ removePlaceholderAt(placeholder);
+ Text *textNode = static_cast<Text *>(startPosition.node());
+ int offset = startPosition.deprecatedEditingOffset();
+
+ 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 (text != " ")
+ 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>
+ VisibleSelection 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(VisibleSelection(endingSelection().end(), endingSelection().affinity()));
+}
+
+Position InsertTextCommand::insertTab(const Position& pos)
+{
+ Position insertPos = VisiblePosition(pos, DOWNSTREAM).deepEquivalent();
+
+ Node *node = insertPos.node();
+ unsigned int offset = insertPos.deprecatedEditingOffset();
+
+ // keep tabs coalesced in tab span
+ if (isTabSpanTextNode(node)) {
+ insertTextIntoNode(static_cast<Text *>(node), offset, "\t");
+ return Position(node, offset + 1);
+ }
+
+ // create new tab span
+ RefPtr<Element> spanNode = createTabSpanElement(document());
+
+ // place it
+ if (!node->isTextNode()) {
+ insertNodeAt(spanNode.get(), insertPos);
+ } else {
+ Text *textNode = static_cast<Text *>(node);
+ if (offset >= textNode->length()) {
+ insertNodeAfter(spanNode.get(), textNode);
+ } else {
+ // split node to make room for the span
+ // NOTE: splitTextNode uses textNode for the
+ // second node in the split, so we need to
+ // insert the span before it.
+ if (offset > 0)
+ splitTextNode(textNode, offset);
+ insertNodeBefore(spanNode, textNode);
+ }
+ }
+
+ // return the position following the new tab
+ return Position(spanNode->lastChild(), caretMaxOffset(spanNode->lastChild()));
+}
+
+bool InsertTextCommand::isInsertTextCommand() const
+{
+ return true;
+}
+
+}