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/*
* Copyright (C) 2006, 2007, 2008 Apple 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,
* 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 "TextDocument.h"
#include "DecodedDataDocumentParser.h"
#include "Element.h"
#include "HTMLNames.h"
#include "HTMLViewSourceDocument.h"
#include "SegmentedString.h"
#include "Text.h"
using namespace std;
namespace WebCore {
using namespace HTMLNames;
// FIXME: TextDocumentParser could just be an HTMLDocumentParser
// which started the Tokenizer in the PlainText state.
class TextDocumentParser : public DecodedDataDocumentParser {
public:
static PassRefPtr<TextDocumentParser> create(Document* document)
{
return adoptRef(new TextDocumentParser(document));
}
static PassRefPtr<TextDocumentParser> create(HTMLViewSourceDocument* document)
{
return adoptRef(new TextDocumentParser(document));
}
virtual ~TextDocumentParser();
private:
TextDocumentParser(Document*);
TextDocumentParser(HTMLViewSourceDocument*);
virtual void insert(const SegmentedString&);
virtual void append(const SegmentedString&);
virtual void finish();
virtual bool finishWasCalled();
inline void checkBuffer(int len = 10)
{
if ((m_dest - m_buffer) > m_size - len) {
// Enlarge buffer
int newSize = std::max(m_size * 2, m_size + len);
int oldOffset = m_dest - m_buffer;
m_buffer = static_cast<UChar*>(fastRealloc(m_buffer, newSize * sizeof(UChar)));
m_dest = m_buffer + oldOffset;
m_size = newSize;
}
}
private:
Element* m_preElement;
bool m_skipLF;
int m_size;
UChar* m_buffer;
UChar* m_dest;
};
TextDocumentParser::TextDocumentParser(Document* document)
: DecodedDataDocumentParser(document)
, m_preElement(0)
, m_skipLF(false)
{
// Allocate buffer
m_size = 254;
m_buffer = static_cast<UChar*>(fastMalloc(sizeof(UChar) * m_size));
m_dest = m_buffer;
}
TextDocumentParser::TextDocumentParser(HTMLViewSourceDocument* document)
: DecodedDataDocumentParser(document, true)
, m_preElement(0)
, m_skipLF(false)
{
// Allocate buffer
m_size = 254;
m_buffer = static_cast<UChar*>(fastMalloc(sizeof(UChar) * m_size));
m_dest = m_buffer;
}
TextDocumentParser::~TextDocumentParser()
{
// finish() should have been called to prevent any leaks
ASSERT(!m_buffer);
}
void TextDocumentParser::insert(const SegmentedString&)
{
ASSERT_NOT_REACHED();
}
void TextDocumentParser::append(const SegmentedString& s)
{
ExceptionCode ec;
m_dest = m_buffer;
SegmentedString str = s;
while (!str.isEmpty()) {
UChar c = *str;
if (c == '\r') {
*m_dest++ = '\n';
// possibly skip an LF in the case of an CRLF sequence
m_skipLF = true;
} else if (c == '\n') {
if (!m_skipLF)
*m_dest++ = c;
else
m_skipLF = false;
} else {
*m_dest++ = c;
m_skipLF = false;
}
str.advance();
// Maybe enlarge the buffer
checkBuffer();
}
if (!m_preElement && !inViewSourceMode()) {
RefPtr<Element> rootElement = document()->createElement(htmlTag, false);
document()->appendChild(rootElement, ec);
RefPtr<Element> body = document()->createElement(bodyTag, false);
rootElement->appendChild(body, ec);
RefPtr<Element> preElement = document()->createElement(preTag, false);
preElement->setAttribute("style", "word-wrap: break-word; white-space: pre-wrap;", ec);
body->appendChild(preElement, ec);
m_preElement = preElement.get();
}
String string = String(m_buffer, m_dest - m_buffer);
if (inViewSourceMode()) {
static_cast<HTMLViewSourceDocument*>(document())->addViewSourceText(string);
return;
}
unsigned charsLeft = string.length();
while (charsLeft) {
// split large text to nodes of manageable size
RefPtr<Text> text = Text::createWithLengthLimit(document(), string, charsLeft);
m_preElement->appendChild(text, ec);
}
}
void TextDocumentParser::finish()
{
if (!m_preElement)
append(SegmentedString()); // Create document structure for an empty text document.
m_preElement = 0;
fastFree(m_buffer);
m_buffer = 0;
m_dest = 0;
// FIXME: Should this call finishParsing even if m_parserStopped is true?
// See equivalent implementation in RawDataDocumentParser.
document()->finishedParsing();
}
bool TextDocumentParser::finishWasCalled()
{
// finish() always calls document()->finishedParsing() so we'll be deleted
// after finish().
return false;
}
TextDocument::TextDocument(Frame* frame, const KURL& url)
: HTMLDocument(frame, url)
{
}
PassRefPtr<DocumentParser> TextDocument::createParser()
{
return TextDocumentParser::create(this);
}
PassRefPtr<DocumentParser> createTextDocumentParser(HTMLViewSourceDocument* document)
{
return TextDocumentParser::create(document);
}
}
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