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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 "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
// ### allow having children in text nodes for entities, comments etc.
Text::Text(Document *doc, const String &_text)
: CharacterData(doc, _text)
{
}
Text::Text(Document *doc)
: CharacterData(doc)
{
}
Text::~Text()
{
}
PassRefPtr<Text> Text::splitText(unsigned offset, ExceptionCode& ec)
{
ec = 0;
// FIXME: This does not copy markers
// 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;
}
// NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
if (isReadOnlyNode()) {
ec = NO_MODIFICATION_ALLOWED_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 (renderer())
static_cast<RenderText*>(renderer())->setText(m_data);
return newText.release();
}
String Text::nodeName() const
{
return textAtom.domString();
}
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() && renderer() && renderer()->isText())
static_cast<RenderText*>(renderer())->setText(m_data);
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);
}
String Text::toString() const
{
// FIXME: substitute entity references as needed!
return nodeValue();
}
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.deprecatedString().latin1(), length - 1);
}
#endif
} // namespace WebCore
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