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301 lines
9.7 KiB
301 lines
9.7 KiB
//
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// Class: dviRenderer
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//
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// Class for rendering TeX DVI files.
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// Part of KDVI- A previewer for TeX DVI files.
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//
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// (C) 2001-2005 Stefan Kebekus. Distributed under the GPL.
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#ifndef _dvirenderer_h_
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#define _dvirenderer_h_
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#include "bigEndianByteReader.h"
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#include "documentRenderer.h"
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#include "fontpool.h"
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#include <kurl.h>
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#include <tqintdict.h>
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#include <tqpointarray.h>
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#include <tqtimer.h>
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#include <tqvaluestack.h>
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#include <tqvaluevector.h>
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class Anchor;
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class DocumentWidget;
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class dviRenderer;
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class fontProgressDialog;
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class ghostscript_interface;
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class infoDialog;
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class TDEAction;
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class KDVIMultiPage;
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class KPrinter;
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class TDEProcess;
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class KProgressDialog;
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class KShellProcess;
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class PreBookmark;
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class TeXFontDefinition;
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extern const int MFResolutions[];
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class DVI_SourceFileAnchor {
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public:
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DVI_SourceFileAnchor() {}
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DVI_SourceFileAnchor(const TQString& name, TQ_UINT32 ln, TQ_UINT32 pg, const Length& _distance_from_top)
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: fileName(name), line(ln), page(pg),
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distance_from_top(_distance_from_top) {}
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TQString fileName;
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TQ_UINT32 line;
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TQ_UINT32 page;
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Length distance_from_top;
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};
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/** Compound of registers, as defined in section 2.6.2 of the DVI
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driver standard, Level 0, published by the TUG DVI driver
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standards committee. */
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struct framedata {
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long dvi_h;
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long dvi_v;
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long w;
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long x;
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long y;
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long z;
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int pxl_v;
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};
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/* this information is saved when using virtual fonts */
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typedef void (dviRenderer::*set_char_proc)(unsigned int, unsigned int);
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typedef void (dviRenderer::*parseSpecials)(char *, TQ_UINT8 *);
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struct drawinf {
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struct framedata data;
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TeXFontDefinition *fontp;
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set_char_proc set_char_p;
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TQIntDict<TeXFontDefinition> *fonttable;
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TeXFontDefinition *_virtual;
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};
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class dviRenderer : public DocumentRenderer, bigEndianByteReader
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{
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TQ_OBJECT
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public:
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dviRenderer(TQWidget *parent);
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~dviRenderer();
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virtual bool setFile(const TQString &fname, const KURL &base);
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class dvifile *dviFile;
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void setPrefs(bool flag_showPS, const TQString &editorCommand, bool useFontHints );
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virtual bool supportsTextSearch() const {return true;}
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bool showPS() { return _postscript; }
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int curr_page() { return current_page+1; }
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virtual bool isValidFile(const TQString& fileName) const;
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/** This method will try to parse the reference part of the DVI
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file's URL, (either a number, which is supposed to be a page
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number, or src:<line><filename>) and see if a corresponding
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section of the DVI file can be found. If so, it returns an
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anchor to that section. If not, it returns an invalid anchor. */
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virtual Anchor parseReference(const TQString &reference);
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// These should not be public... only for the moment
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void read_postamble();
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void draw_part(double current_dimconv, bool is_vfmacro);
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void set_vf_char(unsigned int cmd, unsigned int ch);
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void set_char(unsigned int cmd, unsigned int ch);
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void set_empty_char(unsigned int cmd, unsigned int ch);
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void set_no_char(unsigned int cmd, unsigned int ch);
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void applicationDoSpecial(char * cp);
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void special(long nbytes);
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void printErrorMsgForSpecials(const TQString& msg);
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void color_special(const TQString& cp);
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void html_href_special(const TQString& cp);
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void html_anchor_end();
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void draw_page();
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public slots:
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void exportPS(const TQString& fname = TQString(), const TQString& options = TQString(), KPrinter* printer = 0);
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void exportPDF();
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void showInfo();
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void handleSRCLink(const TQString &linkText, TQMouseEvent *e, DocumentWidget *widget);
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void embedPostScript();
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void abortExternalProgramm();
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/** simply emits "setStatusBarText( TQString() )". This is used
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in dviRenderer::mouseMoveEvent(), see the explanation there. */
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void clearStatusBar();
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virtual void drawPage(double res, RenderedDocumentPage *page);
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virtual void getText(RenderedDocumentPage* page);
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/** Slots used in conjunction with external programs */
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void dvips_output_receiver(TDEProcess *, char *buffer, int buflen);
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void dvips_terminated(TDEProcess *);
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void editorCommand_terminated(TDEProcess *);
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signals:
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/** Passed through to the top-level kpart. */
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// void setStatusBarText( const TQString& );
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private slots:
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/** This method shows a dialog that tells the user that source
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information is present, and gives the opportunity to open the
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manual and learn more about forward and inverse search */
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void showThatSourceInformationIsPresent();
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private:
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/** URL to the DVI file
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This field is initialized by the setFile() method. See the
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explanation there. */
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KURL baseURL;
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/** This method parses a color specification of type "gray 0.5", "rgb
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0.5 0.7 1.0", "hsb ...", "cmyk .." or "PineGreen". See the source
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code for details. */
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TQColor parseColorSpecification(const TQString& colorSpec);
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/** This map contains the colors which are known by name. This field
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is initialized in the method parseColorSpecification() as soon as
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it is needed. */
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TQMap<TQString, TQColor> namedColors;
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/* This method locates special PDF characters in a string and
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replaces them by UTF8. See Section 3.2.3 of the PDF reference
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guide for information */
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TQString PDFencodingToTQString(const TQString& pdfstring);
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void setResolution(double resolution_in_DPI);
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fontPool font_pool;
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infoDialog *info;
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double resolutionInDPI;
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// @@@ explanation
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void prescan(parseSpecials specialParser);
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void prescan_embedPS(char *cp, TQ_UINT8 *);
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void prescan_removePageSizeInfo(char *cp, TQ_UINT8 *);
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void prescan_parseSpecials(char *cp, TQ_UINT8 *);
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void prescan_ParsePapersizeSpecial(const TQString& cp);
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void prescan_ParseBackgroundSpecial(const TQString& cp);
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void prescan_ParseHTMLAnchorSpecial(const TQString& cp);
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void prescan_ParsePSHeaderSpecial(const TQString& cp);
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void prescan_ParsePSBangSpecial(const TQString& cp);
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void prescan_ParsePSQuoteSpecial(const TQString& cp);
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void prescan_ParsePSSpecial(const TQString& cp);
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void prescan_ParsePSFileSpecial(const TQString& cp);
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void prescan_ParseSourceSpecial(const TQString& cp);
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void prescan_setChar(unsigned int ch);
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/* */
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TQValueVector<PreBookmark> prebookmarks;
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/** Utility fields used by the embedPostScript method*/
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KProgressDialog *embedPS_progress;
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TQ_UINT16 embedPS_numOfProgressedFiles;
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/** Shrink factor. Units are not quite clear */
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double shrinkfactor;
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TQString errorMsg;
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/** Methods which handle certain special commands. */
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void epsf_special(const TQString& cp);
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void source_special(const TQString& cp);
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/** TPIC specials */
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void TPIC_setPen_special(const TQString& cp);
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void TPIC_addPath_special(const TQString& cp);
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void TPIC_flushPath_special();
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/** This timer is used to delay clearing of the statusbar. Clearing
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the statusbar is delayed to avoid awful flickering when the
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mouse moves over a block of text that contains source
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hyperlinks. The signal timeout() is connected to the method
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clearStatusBar() of *this. */
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TQTimer clearStatusBarTimer;
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// List of source-hyperlinks on all pages. This vector is generated
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// when the DVI-file is first loaded, i.e. when draw_part is called
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// with PostScriptOutPutString != NULL
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TQValueVector<DVI_SourceFileAnchor> sourceHyperLinkAnchors;
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// If not NULL, the text currently drawn represents a source
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// hyperlink to the (relative) URL given in the string;
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TQString *source_href;
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// If not NULL, the text currently drawn represents a hyperlink to
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// the (relative) URL given in the string;
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TQString *HTML_href;
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TQString editorCommand;
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/** Stack for register compounds, used for the DVI-commands PUSH/POP
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as explained in section 2.5 and 2.6.2 of the DVI driver standard,
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Level 0, published by the TUG DVI driver standards committee. */
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TQValueStack<struct framedata> stack;
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/** A stack where color are stored, according to the documentation of
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DVIPS */
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TQValueStack<TQColor> colorStack;
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/** The global color is to be used when the color stack is empty */
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TQColor globalColor;
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/** If PostScriptOutPutFile is non-zero, then no rendering takes
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place. Instead, the PostScript code which is generated by the
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\special-commands is written to the PostScriptString */
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TQString *PostScriptOutPutString;
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ghostscript_interface *PS_interface;
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/** true, if gs should be used, otherwise, only bounding boxes are
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drawn. */
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bool _postscript;
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/** This flag is used when rendering a dvi-page. It is set to "true"
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when any dvi-command other than "set" or "put" series of commands
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is encountered. This is considered to mark the end of a word. */
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bool line_boundary_encountered;
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bool word_boundary_encountered;
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unsigned int current_page;
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/** Used to run and to show the progress of dvips and friends. */
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fontProgressDialog *progress;
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KShellProcess *proc;
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KPrinter *export_printer;
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TQString export_fileName;
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TQString export_tmpFileName;
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TQString export_errorString;
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/** Data required for handling TPIC specials */
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float penWidth_in_mInch;
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TQPointArray TPIC_path;
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TQ_UINT16 number_of_elements_in_path;
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struct drawinf currinf;
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RenderedDocumentPage* currentlyDrawnPage;
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};
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#endif
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