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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QTEXTHTMLPARSER_P_H
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#define QTEXTHTMLPARSER_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "QtCore/qvector.h"
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#include "QtGui/qbrush.h"
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#include "QtGui/qcolor.h"
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#include "QtGui/qfont.h"
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#include "QtGui/qtextdocument.h"
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#include "QtGui/qtextcursor.h"
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#include "private/qtextformat_p.h"
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#include "private/qtextdocument_p.h"
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#include "private/qcssparser_p.h"
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#ifndef QT_NO_TEXTHTMLPARSER
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QT_BEGIN_NAMESPACE
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enum QTextHTMLElements {
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Html_unknown = -1,
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Html_qt = 0,
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Html_body,
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Html_a,
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Html_em,
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Html_i,
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Html_big,
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Html_small,
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Html_strong,
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Html_b,
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Html_cite,
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Html_address,
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Html_var,
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Html_dfn,
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Html_h1,
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Html_h2,
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Html_h3,
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Html_h4,
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Html_h5,
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Html_h6,
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Html_p,
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Html_center,
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Html_font,
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Html_ul,
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Html_ol,
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Html_li,
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Html_code,
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Html_tt,
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Html_kbd,
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Html_samp,
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Html_img,
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Html_br,
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Html_hr,
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Html_sub,
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Html_sup,
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Html_pre,
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Html_blockquote,
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Html_head,
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Html_div,
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Html_span,
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Html_dl,
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Html_dt,
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Html_dd,
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Html_u,
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Html_s,
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Html_nobr,
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// tables
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Html_table,
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Html_tr,
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Html_td,
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Html_th,
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Html_thead,
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Html_tbody,
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Html_tfoot,
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Html_caption,
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// misc...
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Html_html,
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Html_style,
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Html_title,
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Html_meta,
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Html_link,
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Html_script,
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Html_NumElements
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};
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struct QTextHtmlElement
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{
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const char *name;
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QTextHTMLElements id;
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enum DisplayMode { DisplayBlock, DisplayInline, DisplayTable, DisplayNone } displayMode;
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};
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class QTextHtmlParser;
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struct QTextHtmlParserNode {
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enum WhiteSpaceMode {
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WhiteSpaceNormal,
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WhiteSpacePre,
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WhiteSpaceNoWrap,
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WhiteSpacePreWrap,
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WhiteSpaceModeUndefined = -1
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};
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QTextHtmlParserNode();
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QString tag;
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QString text;
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QStringList attributes;
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int parent;
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QVector<int> children;
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QTextHTMLElements id;
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QTextCharFormat charFormat;
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QTextBlockFormat blockFormat;
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uint cssFloat : 2;
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uint hasOwnListStyle : 1;
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uint hasCssListIndent : 1;
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uint isEmptyParagraph : 1;
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uint isTextFrame : 1;
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uint isRootFrame : 1;
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uint displayMode : 3; // QTextHtmlElement::DisplayMode
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uint hasHref : 1;
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QTextListFormat::Style listStyle;
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QString imageName;
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qreal imageWidth;
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qreal imageHeight;
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QTextLength width;
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QTextLength height;
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qreal tableBorder;
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int tableCellRowSpan;
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int tableCellColSpan;
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qreal tableCellSpacing;
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qreal tableCellPadding;
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QBrush borderBrush;
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QTextFrameFormat::BorderStyle borderStyle;
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int userState;
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int cssListIndent;
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WhiteSpaceMode wsm;
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inline bool isListStart() const
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{ return id == Html_ol || id == Html_ul; }
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inline bool isTableCell() const
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{ return id == Html_td || id == Html_th; }
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inline bool isBlock() const
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{ return displayMode == QTextHtmlElement::DisplayBlock; }
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inline bool isNotSelfNesting() const
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{ return id == Html_p || id == Html_li; }
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inline bool allowedInContext(int parentId) const
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{
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switch (id) {
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case Html_dd:
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case Html_dt: return (parentId == Html_dl);
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case Html_tr: return (parentId == Html_table
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|| parentId == Html_thead
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|| parentId == Html_tbody
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|| parentId == Html_tfoot
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);
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case Html_th:
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case Html_td: return (parentId == Html_tr);
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case Html_thead:
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case Html_tbody:
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case Html_tfoot: return (parentId == Html_table);
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case Html_caption: return (parentId == Html_table);
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case Html_body: return parentId != Html_head;
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default: break;
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}
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return true;
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}
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inline bool mayNotHaveChildren() const
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{ return id == Html_img || id == Html_hr || id == Html_br || id == Html_meta; }
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void initializeProperties(const QTextHtmlParserNode *parent, const QTextHtmlParser *parser);
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inline int uncollapsedMargin(int mar) const { return margin[mar]; }
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bool isNestedList(const QTextHtmlParser *parser) const;
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void parseStyleAttribute(const QString &value, const QTextDocument *resourceProvider);
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#ifndef QT_NO_CSSPARSER
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void applyCssDeclarations(const QVector<QCss::Declaration> &declarations, const QTextDocument *resourceProvider);
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void setListStyle(const QVector<QCss::Value> &cssValues);
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#endif
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void applyBackgroundImage(const QString &url, const QTextDocument *resourceProvider);
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bool hasOnlyWhitespace() const;
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int margin[4];
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int padding[4];
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friend class QTextHtmlParser;
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};
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Q_DECLARE_TYPEINFO(QTextHtmlParserNode, Q_MOVABLE_TYPE);
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class QTextHtmlParser
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{
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public:
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enum Margin {
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MarginTop,
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MarginRight,
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MarginBottom,
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MarginLeft
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};
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inline const QTextHtmlParserNode &at(int i) const { return nodes.at(i); }
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inline QTextHtmlParserNode &operator[](int i) { return nodes[i]; }
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inline int count() const { return nodes.count(); }
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inline int last() const { return nodes.count()-1; }
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int depth(int i) const;
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int topMargin(int i) const;
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int bottomMargin(int i) const;
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inline int leftMargin(int i) const { return margin(i, MarginLeft); }
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inline int rightMargin(int i) const { return margin(i, MarginRight); }
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inline int topPadding(int i) const { return at(i).padding[MarginTop]; }
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inline int bottomPadding(int i) const { return at(i).padding[MarginBottom]; }
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inline int leftPadding(int i) const { return at(i).padding[MarginLeft]; }
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inline int rightPadding(int i) const { return at(i).padding[MarginRight]; }
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void dumpHtml();
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void parse(const QString &text, const QTextDocument *resourceProvider);
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static int lookupElement(const QString &element);
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protected:
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QTextHtmlParserNode *newNode(int parent);
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QVector<QTextHtmlParserNode> nodes;
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QString txt;
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int pos, len;
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bool textEditMode;
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void parse();
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void parseTag();
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void parseCloseTag();
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void parseExclamationTag();
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QString parseEntity();
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QString parseWord();
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QTextHtmlParserNode *resolveParent();
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void resolveNode();
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QStringList parseAttributes();
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void applyAttributes(const QStringList &attributes);
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void eatSpace();
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inline bool hasPrefix(QChar c, int lookahead = 0) const
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{return pos + lookahead < len && txt.at(pos) == c; }
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int margin(int i, int mar) const;
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bool nodeIsChildOf(int i, QTextHTMLElements id) const;
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#ifndef QT_NO_CSSPARSER
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QVector<QCss::Declaration> declarationsForNode(int node) const;
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void resolveStyleSheetImports(const QCss::StyleSheet &sheet);
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void importStyleSheet(const QString &href);
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struct ExternalStyleSheet
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{
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inline ExternalStyleSheet() {}
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inline ExternalStyleSheet(const QString &_url, const QCss::StyleSheet &_sheet)
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: url(_url), sheet(_sheet) {}
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QString url;
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QCss::StyleSheet sheet;
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};
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QVector<ExternalStyleSheet> externalStyleSheets;
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QVector<QCss::StyleSheet> inlineStyleSheets;
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#endif
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const QTextDocument *resourceProvider;
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};
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QT_END_NAMESPACE
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#endif // QT_NO_TEXTHTMLPARSER
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#endif // QTEXTHTMLPARSER_P_H
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