arospdf/xpdf/Page.h

   1 //========================================================================
   2 //
   3 // Page.h
   4 //
   5 // Copyright 1996-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #ifndef PAGE_H
  10 #define PAGE_H
  11
  12 #include <aconf.h>
  13
  14 #ifdef USE_GCC_PRAGMAS
  15 #pragma interface
  16 #endif
  17
  18 #include "Object.h"
  19
  20 class Dict;
  21 class XRef;
  22 class OutputDev;
  23 class Links;
  24 class Catalog;
  25
  26 //------------------------------------------------------------------------
  27
  28 class PDFRectangle {
  29 public:
  30   double x1, y1, x2, y2;
  31
  32   PDFRectangle() { x1 = y1 = x2 = y2 = 0; }
  33   PDFRectangle(double x1A, double y1A, double x2A, double y2A)
  34     { x1 = x1A; y1 = y1A; x2 = x2A; y2 = y2A; }
  35   GBool isValid() { return x1 != 0 || y1 != 0 || x2 != 0 || y2 != 0; }
  36   void clipTo(PDFRectangle *rect);
  37 };
  38
  39 //------------------------------------------------------------------------
  40 // PageAttrs
  41 //------------------------------------------------------------------------
  42
  43 class PageAttrs {
  44 public:
  45
  46   // Construct a new PageAttrs xObject by merging a dictionary
  47   // (of type Pages or Page) into another PageAttrs xObject.  If
  48   // <attrs> is NULL, uses defaults.
  49   PageAttrs(PageAttrs *attrs, Dict *dict);
  50
  51   // Destructor.
  52   ~PageAttrs();
  53
  54   // Accessors.
  55   PDFRectangle *getMediaBox() { return &mediaBox; }
  56   PDFRectangle *getCropBox() { return &cropBox; }
  57   GBool isCropped() { return haveCropBox; }
  58   PDFRectangle *getBleedBox() { return &bleedBox; }
  59   PDFRectangle *getTrimBox() { return &trimBox; }
  60   PDFRectangle *getArtBox() { return &artBox; }
  61   int getRotate() { return rotate; }
  62   GString *getLastModified()
  63     { return lastModified.isString()
  64         ? lastModified.getString() : (GString *)NULL; }
  65   Dict *getBoxColorInfo()
  66     { return boxColorInfo.isDict() ? boxColorInfo.getDict() : (Dict *)NULL; }
  67   Dict *getGroup()
  68     { return group.isDict() ? group.getDict() : (Dict *)NULL; }
  69   Stream *getMetadata()
  70     { return metadata.isStream() ? metadata.getStream() : (Stream *)NULL; }
  71   Dict *getPieceInfo()
  72     { return pieceInfo.isDict() ? pieceInfo.getDict() : (Dict *)NULL; }
  73   Dict *getSeparationInfo()
  74     { return separationInfo.isDict()
  75         ? separationInfo.getDict() : (Dict *)NULL; }
  76   Dict *getResourceDict()
  77     { return resources.isDict() ? resources.getDict() : (Dict *)NULL; }
  78
  79 private:
  80
  81   GBool readBox(Dict *dict, char *key, PDFRectangle *box);
  82
  83   PDFRectangle mediaBox;
  84   PDFRectangle cropBox;
  85   GBool haveCropBox;
  86   PDFRectangle bleedBox;
  87   PDFRectangle trimBox;
  88   PDFRectangle artBox;
  89   int rotate;
  90   xObject lastModified;
  91   xObject boxColorInfo;
  92   xObject group;
  93   xObject metadata;
  94   xObject pieceInfo;
  95   xObject separationInfo;
  96   xObject resources;
  97 };
  98
  99 //------------------------------------------------------------------------
 100 // Page
 101 //------------------------------------------------------------------------
 102
 103 class Page {
 104 public:
 105
 106   // Constructor.
 107   Page(XRef *xrefA, int numA, Dict *pageDict, PageAttrs *attrsA);
 108
 109   // Destructor.
 110   ~Page();
 111
 112   // Is page valid?
 113   GBool isOk() { return ok; }
 114
 115   // Get page parameters.
 116   int getNum() { return num; }
 117   PDFRectangle *getMediaBox() { return attrs->getMediaBox(); }
 118   PDFRectangle *getCropBox() { return attrs->getCropBox(); }
 119   GBool isCropped() { return attrs->isCropped(); }
 120   double getMediaWidth()
 121     { return attrs->getMediaBox()->x2 - attrs->getMediaBox()->x1; }
 122   double getMediaHeight()
 123     { return attrs->getMediaBox()->y2 - attrs->getMediaBox()->y1; }
 124   double getCropWidth()
 125     { return attrs->getCropBox()->x2 - attrs->getCropBox()->x1; }
 126   double getCropHeight()
 127     { return attrs->getCropBox()->y2 - attrs->getCropBox()->y1; }
 128   PDFRectangle *getBleedBox() { return attrs->getBleedBox(); }
 129   PDFRectangle *getTrimBox() { return attrs->getTrimBox(); }
 130   PDFRectangle *getArtBox() { return attrs->getArtBox(); }
 131   int getRotate() { return attrs->getRotate(); }
 132   GString *getLastModified() { return attrs->getLastModified(); }
 133   Dict *getBoxColorInfo() { return attrs->getBoxColorInfo(); }
 134   Dict *getGroup() { return attrs->getGroup(); }
 135   Stream *getMetadata() { return attrs->getMetadata(); }
 136   Dict *getPieceInfo() { return attrs->getPieceInfo(); }
 137   Dict *getSeparationInfo() { return attrs->getSeparationInfo(); }
 138
 139   // Get resource dictionary.
 140   Dict *getResourceDict() { return attrs->getResourceDict(); }
 141
 142   // Get annotations array.
 143   xObject *getAnnots(xObject *obj) { return annots.fetch(xref, obj); }
 144
 145   // Return a list of links.
 146   Links *getLinks(Catalog *catalog);
 147
 148   // Get contents.
 149   xObject *getContents(xObject *obj) { return contents.fetch(xref, obj); }
 150
 151   // Display a page.
 152   void display(OutputDev *out, double hDPI, double vDPI,
 153                int rotate, GBool useMediaBox, GBool crop,
 154                GBool printing, Catalog *catalog,
 155                GBool (*abortCheckCbk)(void *data) = NULL,
 156                void *abortCheckCbkData = NULL);
 157
 158   // Display part of a page.
 159   void displaySlice(OutputDev *out, double hDPI, double vDPI,
 160                     int rotate, GBool useMediaBox, GBool crop,
 161                     int sliceX, int sliceY, int sliceW, int sliceH,
 162                     GBool printing, Catalog *catalog,
 163                     GBool (*abortCheckCbk)(void *data) = NULL,
 164                     void *abortCheckCbkData = NULL);
 165
 166   void makeBox(double hDPI, double vDPI, int rotate,
 167                GBool useMediaBox, GBool upsideDown,
 168                double sliceX, double sliceY, double sliceW, double sliceH,
 169                PDFRectangle *box, GBool *crop);
 170
 171   void processLinks(OutputDev *out, Catalog *catalog);
 172
 173   // Get the page's default CTM.
 174   void getDefaultCTM(double *ctm, double hDPI, double vDPI,
 175                      int rotate, GBool useMediaBox, GBool upsideDown);
 176
 177 private:
 178
 179   XRef *xref;                   // the xref table for this PDF file
 180   int num;                      // page number
 181   PageAttrs *attrs;             // page attributes
 182   xObject annots;               // annotations array
 183   xObject contents;             // page contents
 184   GBool ok;                     // true if page is valid
 185 };
 186
 187 #endif