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+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ * (C) 1999 Antti Koivisto (koivisto@kde.org)
+ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+#include "Text.h"
+
+#include "CString.h"
+#include "Document.h"
+#include "ExceptionCode.h"
+#include "RenderText.h"
+#include "TextBreakIterator.h"
+
+#if ENABLE(SVG)
+#include "RenderSVGInlineText.h"
+#endif // ENABLE(SVG)
+
+namespace WebCore {
+
+// DOM Section 1.1.1
+
+Text::Text(Document* document, const String& text)
+ : CharacterData(document, text)
+{
+}
+
+Text::Text(Document* document)
+ : CharacterData(document)
+{
+}
+
+Text::~Text()
+{
+}
+
+PassRefPtr<Text> Text::splitText(unsigned offset, ExceptionCode& ec)
+{
+ ec = 0;
+
+ // INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than
+ // the number of 16-bit units in data.
+ if (offset > m_data->length()) {
+ ec = INDEX_SIZE_ERR;
+ return 0;
+ }
+
+ RefPtr<StringImpl> oldStr = m_data;
+ RefPtr<Text> newText = createNew(oldStr->substring(offset));
+ m_data = oldStr->substring(0, offset);
+
+ dispatchModifiedEvent(oldStr.get());
+
+ if (parentNode())
+ parentNode()->insertBefore(newText.get(), nextSibling(), ec);
+ if (ec)
+ return 0;
+
+ if (parentNode())
+ document()->textNodeSplit(this);
+
+ if (renderer())
+ static_cast<RenderText*>(renderer())->setText(m_data);
+
+ return newText.release();
+}
+
+static const Text* earliestLogicallyAdjacentTextNode(const Text* t)
+{
+ const Node* n = t;
+ while ((n = n->previousSibling())) {
+ Node::NodeType type = n->nodeType();
+ if (type == Node::TEXT_NODE || type == Node::CDATA_SECTION_NODE) {
+ t = static_cast<const Text*>(n);
+ continue;
+ }
+
+ // We would need to visit EntityReference child text nodes if they existed
+ ASSERT(type != Node::ENTITY_REFERENCE_NODE || !n->hasChildNodes());
+ break;
+ }
+ return t;
+}
+
+static const Text* latestLogicallyAdjacentTextNode(const Text* t)
+{
+ const Node* n = t;
+ while ((n = n->nextSibling())) {
+ Node::NodeType type = n->nodeType();
+ if (type == Node::TEXT_NODE || type == Node::CDATA_SECTION_NODE) {
+ t = static_cast<const Text*>(n);
+ continue;
+ }
+
+ // We would need to visit EntityReference child text nodes if they existed
+ ASSERT(type != Node::ENTITY_REFERENCE_NODE || !n->hasChildNodes());
+ break;
+ }
+ return t;
+}
+
+String Text::wholeText() const
+{
+ const Text* startText = earliestLogicallyAdjacentTextNode(this);
+ const Text* endText = latestLogicallyAdjacentTextNode(this);
+
+ Vector<UChar> result;
+ Node* onePastEndText = endText->nextSibling();
+ for (const Node* n = startText; n != onePastEndText; n = n->nextSibling()) {
+ if (!n->isTextNode())
+ continue;
+ const Text* t = static_cast<const Text*>(n);
+ const String& data = t->data();
+ result.append(data.characters(), data.length());
+ }
+
+ return String::adopt(result);
+}
+
+PassRefPtr<Text> Text::replaceWholeText(const String& newText, ExceptionCode&)
+{
+ // Remove all adjacent text nodes, and replace the contents of this one.
+
+ // Protect startText and endText against mutation event handlers removing the last ref
+ RefPtr<Text> startText = const_cast<Text*>(earliestLogicallyAdjacentTextNode(this));
+ RefPtr<Text> endText = const_cast<Text*>(latestLogicallyAdjacentTextNode(this));
+
+ RefPtr<Text> protectedThis(this); // Mutation event handlers could cause our last ref to go away
+ Node* parent = parentNode(); // Protect against mutation handlers moving this node during traversal
+ ExceptionCode ignored = 0;
+ for (RefPtr<Node> n = startText; n && n != this && n->isTextNode() && n->parentNode() == parent;) {
+ RefPtr<Node> nodeToRemove(n.release());
+ n = nodeToRemove->nextSibling();
+ parent->removeChild(nodeToRemove.get(), ignored);
+ }
+
+ if (this != endText) {
+ Node* onePastEndText = endText->nextSibling();
+ for (RefPtr<Node> n = nextSibling(); n && n != onePastEndText && n->isTextNode() && n->parentNode() == parent;) {
+ RefPtr<Node> nodeToRemove(n.release());
+ n = nodeToRemove->nextSibling();
+ parent->removeChild(nodeToRemove.get(), ignored);
+ }
+ }
+
+ if (newText.isEmpty()) {
+ if (parent && parentNode() == parent)
+ parent->removeChild(this, ignored);
+ return 0;
+ }
+
+ setData(newText, ignored);
+ return protectedThis.release();
+}
+
+String Text::nodeName() const
+{
+ return textAtom.string();
+}
+
+Node::NodeType Text::nodeType() const
+{
+ return TEXT_NODE;
+}
+
+PassRefPtr<Node> Text::cloneNode(bool /*deep*/)
+{
+ return document()->createTextNode(m_data);
+}
+
+bool Text::rendererIsNeeded(RenderStyle *style)
+{
+ if (!CharacterData::rendererIsNeeded(style))
+ return false;
+
+ bool onlyWS = containsOnlyWhitespace();
+ if (!onlyWS)
+ return true;
+
+ RenderObject *par = parentNode()->renderer();
+
+ if (par->isTable() || par->isTableRow() || par->isTableSection() || par->isTableCol() || par->isFrameSet())
+ return false;
+
+ if (style->preserveNewline()) // pre/pre-wrap/pre-line always make renderers.
+ return true;
+
+ RenderObject *prev = previousRenderer();
+ if (prev && prev->isBR()) // <span><br/> <br/></span>
+ return false;
+
+ if (par->isInlineFlow()) {
+ // <span><div/> <div/></span>
+ if (prev && !prev->isInline())
+ return false;
+ } else {
+ if (par->isRenderBlock() && !par->childrenInline() && (!prev || !prev->isInline()))
+ return false;
+
+ RenderObject *first = par->firstChild();
+ while (first && first->isFloatingOrPositioned())
+ first = first->nextSibling();
+ RenderObject *next = nextRenderer();
+ if (!first || next == first)
+ // Whitespace at the start of a block just goes away. Don't even
+ // make a render object for this text.
+ return false;
+ }
+
+ return true;
+}
+
+RenderObject *Text::createRenderer(RenderArena *arena, RenderStyle *style)
+{
+#if ENABLE(SVG)
+ if (parentNode()->isSVGElement())
+ return new (arena) RenderSVGInlineText(this, m_data);
+#endif // ENABLE(SVG)
+
+ return new (arena) RenderText(this, m_data);
+}
+
+void Text::attach()
+{
+ createRendererIfNeeded();
+ CharacterData::attach();
+}
+
+void Text::recalcStyle(StyleChange change)
+{
+ if (change != NoChange && parentNode()) {
+ if (renderer())
+ renderer()->setStyle(parentNode()->renderer()->style());
+ }
+ if (changed()) {
+ if (renderer()) {
+ if (renderer()->isText())
+ static_cast<RenderText*>(renderer())->setText(m_data);
+ } else {
+ if (attached())
+ detach();
+ attach();
+ }
+ }
+ setChanged(NoStyleChange);
+}
+
+// DOM Section 1.1.1
+bool Text::childTypeAllowed(NodeType)
+{
+ return false;
+}
+
+PassRefPtr<Text> Text::createNew(PassRefPtr<StringImpl> string)
+{
+ return new Text(document(), string);
+}
+
+PassRefPtr<Text> Text::createWithLengthLimit(Document* doc, const String& text, unsigned& charsLeft, unsigned maxChars)
+{
+ if (charsLeft == text.length() && charsLeft <= maxChars) {
+ charsLeft = 0;
+ return new Text(doc, text);
+ }
+
+ unsigned start = text.length() - charsLeft;
+ unsigned end = start + std::min(charsLeft, maxChars);
+
+ // check we are not on an unbreakable boundary
+ TextBreakIterator* it = characterBreakIterator(text.characters(), text.length());
+ if (end < text.length() && !isTextBreak(it, end))
+ end = textBreakPreceding(it, end);
+
+ // maxChars of unbreakable characters could lead to infinite loop
+ if (end <= start)
+ end = text.length();
+
+ String nodeText = text.substring(start, end - start);
+ charsLeft = text.length() - end;
+
+ return new Text(doc, nodeText);
+}
+
+#ifndef NDEBUG
+void Text::formatForDebugger(char *buffer, unsigned length) const
+{
+ String result;
+ String s;
+
+ s = nodeName();
+ if (s.length() > 0) {
+ result += s;
+ }
+
+ s = nodeValue();
+ if (s.length() > 0) {
+ if (result.length() > 0)
+ result += "; ";
+ result += "value=";
+ result += s;
+ }
+
+ strncpy(buffer, result.utf8().data(), length - 1);
+}
+#endif
+
+} // namespace WebCore