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WPXContentListener.h

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00001 /* libwpd
00002  * Copyright (C) 2006 Fridrich Strba (fridrich.strba@bluewin.ch)
00003  *
00004  * This library is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Library General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2 of the License, or (at your option) any later version.
00008  *
00009  * This library is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Library General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Library General Public
00015  * License along with this library; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
00017  *
00018  * For further information visit http://libwpd.sourceforge.net
00019  */
00020 
00021 /* "This product is not manufactured, approved, or supported by
00022  * Corel Corporation or Corel Corporation Limited."
00023  */
00024 
00025 #ifndef WPXCONTENTLISTENER_H
00026 #define WPXCONTENTLISTENER_H
00027 
00028 #include "WPXHLListenerImpl.h"
00029 #include "WPXTable.h"
00030 #include "WPXPropertyListVector.h"
00031 #include "libwpd_internal.h"
00032 #include "WPXSubDocument.h"
00033 #include "WPXPageSpan.h"
00034 #include "WPXListener.h"
00035 #include <vector>
00036 #include <list>
00037 #include <set>
00038 
00039 typedef struct _WPXTableDefinition WPXTableDefinition;
00040 struct _WPXTableDefinition
00041 {
00042         uint8_t m_positionBits;
00043         float m_leftOffset;
00044         std::vector < WPXColumnDefinition > columns;
00045         std::vector < WPXColumnProperties > columnsProperties;
00046 };
00047 
00048 typedef struct _WPXContentParsingState WPXContentParsingState;
00049 struct _WPXContentParsingState
00050 {
00051         _WPXContentParsingState();
00052         ~_WPXContentParsingState();
00053 
00054         uint32_t m_textAttributeBits;
00055         float m_fontSize;
00056         WPXString *m_fontName;
00057         RGBSColor *m_fontColor;
00058         RGBSColor *m_highlightColor;
00059 
00060         bool m_isParagraphColumnBreak;
00061         bool m_isParagraphPageBreak;
00062         uint8_t m_paragraphJustification;
00063         uint8_t m_tempParagraphJustification; // TODO: remove this one after the tabs are properly implemented
00064         float m_paragraphLineSpacing;
00065 
00066         bool m_isDocumentStarted;
00067         bool m_isPageSpanOpened;
00068         bool m_isSectionOpened;
00069         bool m_isPageSpanBreakDeferred;
00070         bool m_isHeaderFooterWithoutParagraph;
00071 
00072         bool m_isSpanOpened;
00073         bool m_isParagraphOpened;
00074         bool m_isListElementOpened;
00075 
00076         std::vector<unsigned int> m_numRowsToSkip;
00077         WPXTableDefinition m_tableDefinition;
00078         int m_currentTableCol;
00079         int m_currentTableRow;
00080         int m_currentTableCellNumberInRow;
00081         bool m_isTableOpened;
00082         bool m_isTableRowOpened;
00083         bool m_isTableColumnOpened;
00084         bool m_isTableCellOpened;
00085         bool m_wasHeaderRow;
00086         bool m_isCellWithoutParagraph;
00087         uint32_t m_cellAttributeBits;
00088         uint8_t m_paragraphJustificationBeforeTable;
00089         
00090         std::list<WPXPageSpan>::iterator m_nextPageSpanIter;
00091         int m_numPagesRemainingInSpan;
00092 
00093         bool m_sectionAttributesChanged;
00094         int m_numColumns;
00095         std::vector < WPXColumnDefinition > m_textColumns;
00096         bool m_isTextColumnWithoutParagraph;
00097 
00098         float m_pageFormLength;
00099         float m_pageFormWidth;
00100         WPXFormOrientation m_pageFormOrientation;
00101 
00102         float m_pageMarginLeft;
00103         float m_pageMarginRight;
00104         float m_paragraphMarginLeft;  // resulting paragraph margin that is one of the paragraph
00105         float m_paragraphMarginRight; // properties
00106         float m_paragraphMarginTop;
00107         float m_paragraphMarginBottom;
00108         float m_leftMarginByPageMarginChange;  // part of the margin due to the PAGE margin change
00109         float m_rightMarginByPageMarginChange; // inside a page that already has content.
00110         float m_sectionMarginLeft;  // In multicolumn sections, the above two will be rather interpreted
00111         float m_sectionMarginRight; // as section margin change 
00112         float m_leftMarginByParagraphMarginChange;  // part of the margin due to the PARAGRAPH
00113         float m_rightMarginByParagraphMarginChange; // margin change (in WP6)
00114         float m_leftMarginByTabs;  // part of the margin due to the LEFT or LEFT/RIGHT Indent; the
00115         float m_rightMarginByTabs; // only part of the margin that is reset at the end of a paragraph
00116 
00117         float m_listReferencePosition; // position from the left page margin of the list number/bullet
00118         float m_listBeginPosition; // position from the left page margin of the beginning of the list
00119 
00120         float m_paragraphTextIndent; // resulting first line indent that is one of the paragraph properties
00121         float m_textIndentByParagraphIndentChange; // part of the indent due to the PARAGRAPH indent (WP6???)
00122         float m_textIndentByTabs; // part of the indent due to the "Back Tab" or "Left Tab"
00123 
00124         uint8_t m_currentListLevel;
00125         
00126         uint16_t m_alignmentCharacter;
00127         std::vector<WPXTabStop> m_tabStops;
00128         bool m_isTabPositionRelative;
00129 
00130         std::set <const WPXSubDocument *> m_subDocuments;
00131 
00132         bool m_inSubDocument;
00133         bool m_isNote;
00134 };
00135 
00136 class WPXContentListener : public WPXListener
00137 {
00138 protected:
00139         WPXContentListener(std::list<WPXPageSpan> &pageList, WPXHLListenerImpl *listenerImpl);
00140         virtual ~WPXContentListener();
00141 
00142         virtual void startDocument();
00143         void handleSubDocument(const WPXSubDocument *subDocument, const bool isHeaderFooter, WPXTableList tableList, int nextTableIndice);
00144         virtual void insertBreak(const uint8_t breakType);
00145         virtual void lineSpacingChange(const float lineSpacing);
00146         virtual void justificationChange(const uint8_t justification);
00147 
00148         WPXContentParsingState *m_ps; // parse state
00149         WPXHLListenerImpl * m_listenerImpl;
00150         WPXPropertyList m_metaData;
00151         std::list <WPXPageSpan> &m_pageList;
00152 
00153         virtual void _handleSubDocument(const WPXSubDocument *subDocument, const bool isHeaderFooter, WPXTableList tableList, int nextTableIndice) = 0;
00154         virtual void _flushText() = 0;
00155         virtual void _changeList() = 0;
00156 
00157         void _openSection();
00158         void _closeSection();
00159 
00160         void _openPageSpan();
00161         void _closePageSpan();
00162 
00163         virtual void _appendParagraphProperties(WPXPropertyList &propList, const bool isListElement=false);
00164         virtual void _getTabStops(WPXPropertyListVector &tabStops);
00165         virtual void _appendJustification(WPXPropertyList &propList, int justification);
00166         virtual void _resetParagraphState(const bool isListElement=false);
00167         virtual void _openParagraph();
00168         void _closeParagraph();
00169 
00170         void _openListElement();
00171         void _closeListElement();
00172 
00173         void _openSpan();
00174         void _closeSpan();
00175 
00176         void _openTable();
00177         void _closeTable();
00178         void _openTableRow(const float height, const bool isMinimumHeight, const bool isHeaderRow);
00179         void _closeTableRow();
00180         void _openTableCell(const uint8_t colSpan, const uint8_t rowSpan, const uint8_t borderBits, 
00181                                 const RGBSColor * cellFgColor, const RGBSColor * cellBgColor,
00182                                 const RGBSColor * cellBorderColor,
00183                                 const WPXVerticalAlignment cellVerticalAlignment);
00184         void _closeTableCell();
00185 
00186         float _movePositionToFirstColumn(float position);
00187 
00188 private:
00189         WPXString _colorToString(const RGBSColor * color);
00190         WPXString _mergeColorsToString(const RGBSColor *fgColor, const RGBSColor *bgColor);
00191 };
00192 
00193 #endif /* WPXCONTENTLISTENER_H */

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