rosapps/smartpdf/poppler/poppler/Outline.cc

   1 //========================================================================
   2 //
   3 // Outline.cc
   4 //
   5 // Copyright 2002-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #include <config.h>
  10
  11 #ifdef USE_GCC_PRAGMAS
  12 #pragma implementation
  13 #endif
  14
  15 #include "goo/gmem.h"
  16 #include "goo/GooString.h"
  17 #include "goo/GooList.h"
  18 #include "Link.h"
  19 #include "PDFDocEncoding.h"
  20 #include "Outline.h"
  21 #include "UGooString.h"
  22
  23 //------------------------------------------------------------------------
  24
  25 Outline::Outline(Object *outlineObj, XRef *xref) {
  26   Object first, last;
  27
  28   items = NULL;
  29   if (!outlineObj->isDict()) {
  30     return;
  31   }
  32   items = OutlineItem::readItemList(outlineObj->dictLookupNF("First", &first),
  33                                     outlineObj->dictLookupNF("Last", &last),
  34                                     xref);
  35   first.free();
  36   last.free();
  37 }
  38
  39 Outline::~Outline() {
  40   if (items) {
  41     deleteGooList(items, OutlineItem);
  42   }
  43 }
  44
  45 //------------------------------------------------------------------------
  46
  47 OutlineItem::OutlineItem(Dict *dict, XRef *xrefA) {
  48   Object obj1;
  49   GooString *s;
  50   int i;
  51
  52   xref = xrefA;
  53   title = NULL;
  54   action = NULL;
  55   kids = NULL;
  56
  57   if (dict->lookup("Title", &obj1)->isString()) {
  58     s = obj1.getString();
  59     if ((s->getChar(0) & 0xff) == 0xfe &&
  60         (s->getChar(1) & 0xff) == 0xff) {
  61       titleLen = (s->getLength() - 2) / 2;
  62       title = (Unicode *)gmallocn(titleLen, sizeof(Unicode));
  63       for (i = 0; i < titleLen; ++i) {
  64         title[i] = ((s->getChar(2 + 2*i) & 0xff) << 8) |
  65                    (s->getChar(3 + 2*i) & 0xff);
  66       }
  67     } else {
  68       titleLen = s->getLength();
  69       title = (Unicode *)gmallocn(titleLen, sizeof(Unicode));
  70       for (i = 0; i < titleLen; ++i) {
  71         title[i] = pdfDocEncoding[s->getChar(i) & 0xff];
  72       }
  73     }
  74   } else {
  75     titleLen = 0;
  76   }
  77   obj1.free();
  78
  79   if (!dict->lookup("Dest", &obj1)->isNull()) {
  80     action = LinkAction::parseDest(&obj1);
  81   } else {
  82       obj1.free();
  83     if (!dict->lookup("A", &obj1)->isNull()) {
  84         action = LinkAction::parseAction(&obj1);
  85   }
  86   }
  87   obj1.free();
  88
  89   dict->lookupNF("First", &firstRef);
  90   dict->lookupNF("Last", &lastRef);
  91   dict->lookupNF("Next", &nextRef);
  92
  93   startsOpen = gFalse;
  94   if (dict->lookup("Count", &obj1)->isInt()) {
  95     if (obj1.getInt() > 0) {
  96       startsOpen = gTrue;
  97     }
  98   }
  99   obj1.free();
 100 }
 101
 102 OutlineItem::~OutlineItem() {
 103   close();
 104   if (title) {
 105     gfree(title);
 106   }
 107   if (action) {
 108     delete action;
 109   }
 110   firstRef.free();
 111   lastRef.free();
 112   nextRef.free();
 113 }
 114
 115 GooList *OutlineItem::readItemList(Object *firstItemRef, Object *lastItemRef,
 116                                  XRef *xrefA) {
 117   GooList *items;
 118   OutlineItem *item;
 119   Object obj;
 120   Object *p;
 121
 122   items = new GooList();
 123   p = firstItemRef;
 124   while (p->isRef()) {
 125     if (!p->fetch(xrefA, &obj)->isDict()) {
 126       obj.free();
 127       break;
 128     }
 129     item = new OutlineItem(obj.getDict(), xrefA);
 130     obj.free();
 131     items->append(item);
 132     if (p->getRef().num == lastItemRef->getRef().num &&
 133         p->getRef().gen == lastItemRef->getRef().gen) {
 134       break;
 135     }
 136     p = &item->nextRef;
 137   }
 138
 139   if (!items->getLength()) {
 140     delete items;
 141     items = NULL;
 142   }
 143
 144   return items;
 145 }
 146
 147 void OutlineItem::open() {
 148   if (!kids) {
 149     kids = readItemList(&firstRef, &lastRef, xref);
 150   }
 151 }
 152
 153 void OutlineItem::close() {
 154   if (kids) {
 155     deleteGooList(kids, OutlineItem);
 156     kids = NULL;
 157   }
 158 }