TextDocumentParser.cpp   [plain text]

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "TextDocumentParser.h"

#include "HTMLDocument.h"
#include "HTMLNames.h"
#include "HTMLTokenizer.h"
#include "HTMLTreeBuilder.h"

namespace WebCore {

using namespace HTMLNames;

TextDocumentParser::TextDocumentParser(HTMLDocument* document)
    : HTMLDocumentParser(document, false)
    , m_haveInsertedFakePreElement(false)
{
    tokenizer()->setState(HTMLTokenizerState::PLAINTEXTState);
}

TextDocumentParser::~TextDocumentParser()
{
}

void TextDocumentParser::append(const SegmentedString& text)
{
    if (!m_haveInsertedFakePreElement)
        insertFakePreElement();
    HTMLDocumentParser::append(text);
}

void TextDocumentParser::insertFakePreElement()
{
    // In principle, we should create a specialized tree builder for
    // TextDocuments, but instead we re-use the existing HTMLTreeBuilder.
    // We create a fake token and give it to the tree builder rather than
    // sending fake bytes through the front-end of the parser to avoid
    // distrubing the line/column number calculations.

    Vector<Attribute> attributes;
    attributes.append(Attribute(styleAttr, "word-wrap: break-word; white-space: pre-wrap;"));
    AtomicHTMLToken fakePre(HTMLTokenTypes::StartTag, preTag.localName(), attributes);

    treeBuilder()->constructTreeFromAtomicToken(fakePre);
    // Normally we would skip the first \n after a <pre> element, but we don't
    // want to skip the first \n for text documents!
    treeBuilder()->setShouldSkipLeadingNewline(false);

    m_haveInsertedFakePreElement = true;
}

}