Initial import of kbookreader

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/kbookreader@1242482 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 138 insertions, 0 deletions

diff --git a/src/renderer.h b/src/renderer.h
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+/***************************************************************************
+*   Copyright (C) 2005 by Alexander Nemish   *
+*   atlanter@gmail.com   *
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+*   This program is distributed in the hope that it will be useful,       *
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+*   GNU General Public License for more details.                          *
+*                                                                         *
+*   You should have received a copy of the GNU General Public License     *
+*   along with this program; if not, write to the                         *
+*   Free Software Foundation, Inc.,                                       *
+*   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+***************************************************************************/
+#ifndef RENDERER_H
+#define RENDERER_H
+
+#include <qstringlist.h>
+#include <qfont.h>
+#include <qstring.h>
+#include <qobject.h>
+#include <qsize.h>
+#include <qtimer.h>
+#include <vector>
+#include <memory>
+class QStringList;
+
+class TextLine
+{
+public:
+	static const int PARA_NONE = 0;
+	static const int PARA_START = 1;
+	static const int PARA_END = 2;
+	static const int PARA_BOTH = 3;
+	
+	TextLine(int index, int begin, int end, int paraFlags = PARA_NONE):
+		m_paragraphFlags(paraFlags),
+		m_begin(begin),
+		m_end(end),
+		m_index(index)
+	{}
+	bool isParaStart() const { return m_paragraphFlags & PARA_START; }
+	bool isParaEnd() const { return m_paragraphFlags & PARA_END; }
+	void setParagraphFlags(int flags) { m_paragraphFlags = flags; }
+	const int paragraphFlags() const { return m_paragraphFlags; }
+	const int paragraphIndex() const { return m_index; }
+	const int begin() const { return m_begin; }
+	const int end() const { return m_end; }
+	const int size() const { return m_end - m_begin; }
+private:
+	int m_paragraphFlags;
+	int m_begin;
+	int m_end;
+	int m_index;
+};
+
+/**
+*   \brief Renders input text into list of word wrapped strings
+*	\author Alexandr Nemish <anemish@gmail.com>
+*/
+class Renderer : public QObject
+{
+	Q_OBJECT
+public:
+	Renderer();
+	~Renderer();
+
+	///	\brief Loads and renders list of strings
+	void load(const QStringList & list);
+	///	\brief Renders loaded list of strings
+	void render();
+	/// \brief Clears all rendered data
+	void clear();
+	/// \brief Draws page
+	void drawPage(QPainter & paint, QRect rect, int pageNumber);
+	//Getters
+	/// \brief Returns whether the text is empty
+	bool isEmpty() const { return m_text.empty(); };
+	/// \brief Returns current font
+	QFont font() const { return m_font; }
+	/// \brief Returns current paragraph offset in pixels
+	int paraOffset() const { return m_paraOffset; }
+	/// \brief Returns the number of pages
+	int pageCount() const { return m_pageCount; }
+	/// \brief Returns page size in pixels
+	QSize pageSize() const { return m_pageSize; }
+	//Setters
+	/// \brief Sets current font
+	void setFont(const QFont & font);
+	/// \brief Sets current paragraph offset in pixels
+	void setParaOffset(int offset);
+	/// \brief Sets size of a page
+	void setPageSize(const QSize & size);
+	
+	bool busy() const { return m_isRendering; }
+signals:
+	void renderingFinished();
+private slots:
+	void timeout();
+private:
+	typedef QStringList::const_iterator TStringIter;
+	typedef std::vector<QString> TParagraphs;
+	typedef TParagraphs::size_type TIndex;
+	typedef std::vector<TextLine> TLines;
+	//make it non-copyable		
+	Renderer(const Renderer &);
+	Renderer & operator = (const Renderer &);
+	/// \brief Renders input paragraph into list of wrapped lines
+	void parseParagraph(TIndex idx);
+	/// \brief Returns width of string in pixels
+	int width(const QString & a_string) const;
+	void addLine(TextLine line);
+	int wordAt(const QString & str, int len);
+	QString getWord(const QString & str, int idx);
+	/// \brief Draws justified string
+	void drawLine(QPainter& paint, int x, int y, const TLines::size_type idx);
+	void cancel();
+
+	TParagraphs m_text;
+	TLines m_lines;
+	int m_pageCount;
+	int m_linesPerPage;
+	int m_paraOffset;
+	QFont m_font;
+	std::auto_ptr<QFontMetrics> m_fontMetrics;
+	QSize m_pageSize;
+	bool m_isStartAdded;
+	TIndex m_curParagraph;
+	bool m_isRendering;
+	QTimer m_timer;
+};
+
+#endif