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Diffstat (limited to 'src/gui/text/qtexthtmlparser_p.h')
| -rw-r--r-- | src/gui/text/qtexthtmlparser_p.h | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/src/gui/text/qtexthtmlparser_p.h b/src/gui/text/qtexthtmlparser_p.h new file mode 100644 index 0000000000..a27b2f2ca1 --- /dev/null +++ b/src/gui/text/qtexthtmlparser_p.h @@ -0,0 +1,342 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QTEXTHTMLPARSER_P_H +#define QTEXTHTMLPARSER_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include "QtCore/qvector.h" +#include "QtGui/qbrush.h" +#include "QtGui/qcolor.h" +#include "QtGui/qfont.h" +#include "QtGui/qtextdocument.h" +#include "QtGui/qtextcursor.h" +#include "private/qtextformat_p.h" +#include "private/qtextdocument_p.h" +#include "private/qcssparser_p.h" + +#ifndef QT_NO_TEXTHTMLPARSER + +QT_BEGIN_NAMESPACE + +enum QTextHTMLElements { + Html_unknown = -1, + Html_qt = 0, + Html_body, + + Html_a, + Html_em, + Html_i, + Html_big, + Html_small, + Html_strong, + Html_b, + Html_cite, + Html_address, + Html_var, + Html_dfn, + + Html_h1, + Html_h2, + Html_h3, + Html_h4, + Html_h5, + Html_h6, + Html_p, + Html_center, + + Html_font, + + Html_ul, + Html_ol, + Html_li, + + Html_code, + Html_tt, + Html_kbd, + Html_samp, + + Html_img, + Html_br, + Html_hr, + + Html_sub, + Html_sup, + + Html_pre, + Html_blockquote, + Html_head, + Html_div, + Html_span, + Html_dl, + Html_dt, + Html_dd, + Html_u, + Html_s, + Html_nobr, + + // tables + Html_table, + Html_tr, + Html_td, + Html_th, + Html_thead, + Html_tbody, + Html_tfoot, + Html_caption, + + // misc... + Html_html, + Html_style, + Html_title, + Html_meta, + Html_link, + Html_script, + + Html_NumElements +}; + +struct QTextHtmlElement +{ + const char *name; + QTextHTMLElements id; + enum DisplayMode { DisplayBlock, DisplayInline, DisplayTable, DisplayNone } displayMode; +}; + +class QTextHtmlParser; + +struct QTextHtmlParserNode { + enum WhiteSpaceMode { + WhiteSpaceNormal, + WhiteSpacePre, + WhiteSpaceNoWrap, + WhiteSpacePreWrap, + WhiteSpaceModeUndefined = -1 + }; + + QTextHtmlParserNode(); + QString tag; + QString text; + QStringList attributes; + int parent; + QVector<int> children; + QTextHTMLElements id; + QTextCharFormat charFormat; + QTextBlockFormat blockFormat; + uint cssFloat : 2; + uint hasOwnListStyle : 1; + uint hasCssListIndent : 1; + uint isEmptyParagraph : 1; + uint isTextFrame : 1; + uint isRootFrame : 1; + uint displayMode : 3; // QTextHtmlElement::DisplayMode + uint hasHref : 1; + QTextListFormat::Style listStyle; + QString imageName; + qreal imageWidth; + qreal imageHeight; + QTextLength width; + QTextLength height; + qreal tableBorder; + int tableCellRowSpan; + int tableCellColSpan; + qreal tableCellSpacing; + qreal tableCellPadding; + QBrush borderBrush; + QTextFrameFormat::BorderStyle borderStyle; + int userState; + + int cssListIndent; + + WhiteSpaceMode wsm; + + inline bool isListStart() const + { return id == Html_ol || id == Html_ul; } + inline bool isTableCell() const + { return id == Html_td || id == Html_th; } + inline bool isBlock() const + { return displayMode == QTextHtmlElement::DisplayBlock; } + + inline bool isNotSelfNesting() const + { return id == Html_p || id == Html_li; } + + inline bool allowedInContext(int parentId) const + { + switch (id) { + case Html_dd: + case Html_dt: return (parentId == Html_dl); + case Html_tr: return (parentId == Html_table + || parentId == Html_thead + || parentId == Html_tbody + || parentId == Html_tfoot + ); + case Html_th: + case Html_td: return (parentId == Html_tr); + case Html_thead: + case Html_tbody: + case Html_tfoot: return (parentId == Html_table); + case Html_caption: return (parentId == Html_table); + case Html_body: return parentId != Html_head; + default: break; + } + return true; + } + + inline bool mayNotHaveChildren() const + { return id == Html_img || id == Html_hr || id == Html_br || id == Html_meta; } + + void initializeProperties(const QTextHtmlParserNode *parent, const QTextHtmlParser *parser); + + inline int uncollapsedMargin(int mar) const { return margin[mar]; } + + bool isNestedList(const QTextHtmlParser *parser) const; + + void parseStyleAttribute(const QString &value, const QTextDocument *resourceProvider); + +#ifndef QT_NO_CSSPARSER + void applyCssDeclarations(const QVector<QCss::Declaration> &declarations, const QTextDocument *resourceProvider); + + void setListStyle(const QVector<QCss::Value> &cssValues); +#endif + + void applyBackgroundImage(const QString &url, const QTextDocument *resourceProvider); + + bool hasOnlyWhitespace() const; + + int margin[4]; + int padding[4]; + + friend class QTextHtmlParser; +}; +Q_DECLARE_TYPEINFO(QTextHtmlParserNode, Q_MOVABLE_TYPE); + + +class QTextHtmlParser +{ +public: + enum Margin { + MarginTop, + MarginRight, + MarginBottom, + MarginLeft + }; + + inline const QTextHtmlParserNode &at(int i) const { return nodes.at(i); } + inline QTextHtmlParserNode &operator[](int i) { return nodes[i]; } + inline int count() const { return nodes.count(); } + inline int last() const { return nodes.count()-1; } + int depth(int i) const; + int topMargin(int i) const; + int bottomMargin(int i) const; + inline int leftMargin(int i) const { return margin(i, MarginLeft); } + inline int rightMargin(int i) const { return margin(i, MarginRight); } + + inline int topPadding(int i) const { return at(i).padding[MarginTop]; } + inline int bottomPadding(int i) const { return at(i).padding[MarginBottom]; } + inline int leftPadding(int i) const { return at(i).padding[MarginLeft]; } + inline int rightPadding(int i) const { return at(i).padding[MarginRight]; } + + void dumpHtml(); + + void parse(const QString &text, const QTextDocument *resourceProvider); + + static int lookupElement(const QString &element); +protected: + QTextHtmlParserNode *newNode(int parent); + QVector<QTextHtmlParserNode> nodes; + QString txt; + int pos, len; + + bool textEditMode; + + void parse(); + void parseTag(); + void parseCloseTag(); + void parseExclamationTag(); + QString parseEntity(); + QString parseWord(); + QTextHtmlParserNode *resolveParent(); + void resolveNode(); + QStringList parseAttributes(); + void applyAttributes(const QStringList &attributes); + void eatSpace(); + inline bool hasPrefix(QChar c, int lookahead = 0) const + {return pos + lookahead < len && txt.at(pos) == c; } + int margin(int i, int mar) const; + + bool nodeIsChildOf(int i, QTextHTMLElements id) const; + + +#ifndef QT_NO_CSSPARSER + QVector<QCss::Declaration> declarationsForNode(int node) const; + void resolveStyleSheetImports(const QCss::StyleSheet &sheet); + void importStyleSheet(const QString &href); + + struct ExternalStyleSheet + { + inline ExternalStyleSheet() {} + inline ExternalStyleSheet(const QString &_url, const QCss::StyleSheet &_sheet) + : url(_url), sheet(_sheet) {} + QString url; + QCss::StyleSheet sheet; + }; + QVector<ExternalStyleSheet> externalStyleSheets; + QVector<QCss::StyleSheet> inlineStyleSheets; +#endif + + const QTextDocument *resourceProvider; +}; + +QT_END_NAMESPACE + +#endif // QT_NO_TEXTHTMLPARSER + +#endif // QTEXTHTMLPARSER_P_H |