Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 243 insertions, 0 deletions

diff --git a/Source/WebCore/editing/InsertTextCommand.cpp b/Source/WebCore/editing/InsertTextCommand.cpp
new file mode 100644
index 0000000..fc18e91
--- /dev/null
+++ b/Source/WebCore/editing/InsertTextCommand.cpp
@@ -0,0 +1,243 @@
+/*
+ * 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)
+{
+}
+
+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') == notFound);
+
+    if (!endingSelection().isNonOrphanedCaretOrRange())
+        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);
+    } 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);
+    }
+
+    // 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.
+    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.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;
+}
+
+}