/src/xpdf-4.06/xpdf/Outline.cc
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1 | | //======================================================================== |
2 | | // |
3 | | // Outline.cc |
4 | | // |
5 | | // Copyright 2002-2013 Glyph & Cog, LLC |
6 | | // |
7 | | //======================================================================== |
8 | | |
9 | | #include <aconf.h> |
10 | | |
11 | | #include "gmem.h" |
12 | | #include "gmempp.h" |
13 | | #include "GString.h" |
14 | | #include "GList.h" |
15 | | #include "Error.h" |
16 | | #include "Link.h" |
17 | | #include "TextString.h" |
18 | | #include "Outline.h" |
19 | | |
20 | | //------------------------------------------------------------------------ |
21 | | |
22 | 3.71k | Outline::Outline(Object *outlineObj, XRef *xref) { |
23 | 3.71k | Object first, last; |
24 | | |
25 | 3.71k | items = NULL; |
26 | 3.71k | if (!outlineObj->isDict()) { |
27 | 3.40k | return; |
28 | 3.40k | } |
29 | 308 | outlineObj->dictLookupNF("First", &first); |
30 | 308 | outlineObj->dictLookupNF("Last", &last); |
31 | 308 | if (first.isRef() && last.isRef()) { |
32 | 304 | items = OutlineItem::readItemList(&first, &last, NULL, xref); |
33 | 304 | } |
34 | 308 | first.free(); |
35 | 308 | last.free(); |
36 | 308 | } |
37 | | |
38 | 3.71k | Outline::~Outline() { |
39 | 3.71k | if (items) { |
40 | 304 | deleteGList(items, OutlineItem); |
41 | 304 | } |
42 | 3.71k | } |
43 | | |
44 | | //------------------------------------------------------------------------ |
45 | | |
46 | | OutlineItem::OutlineItem(Object *itemRefA, Dict *dict, |
47 | 928 | OutlineItem *parentA, XRef *xrefA) { |
48 | 928 | Object obj1; |
49 | | |
50 | 928 | xref = xrefA; |
51 | 928 | title = NULL; |
52 | 928 | action = NULL; |
53 | 928 | kids = NULL; |
54 | 928 | parent = parentA; |
55 | | |
56 | 928 | if (dict->lookup("Title", &obj1)->isString()) { |
57 | 194 | title = new TextString(obj1.getString()); |
58 | 194 | } |
59 | 928 | obj1.free(); |
60 | | |
61 | 928 | if (!dict->lookup("Dest", &obj1)->isNull()) { |
62 | 440 | action = LinkAction::parseDest(&obj1); |
63 | 488 | } else { |
64 | 488 | obj1.free(); |
65 | 488 | if (!dict->lookup("A", &obj1)->isNull()) { |
66 | 460 | action = LinkAction::parseAction(&obj1); |
67 | 460 | } |
68 | 488 | } |
69 | 928 | obj1.free(); |
70 | | |
71 | 928 | itemRefA->copy(&itemRef); |
72 | 928 | dict->lookupNF("First", &firstRef); |
73 | 928 | dict->lookupNF("Last", &lastRef); |
74 | 928 | dict->lookupNF("Next", &nextRef); |
75 | | |
76 | 928 | startsOpen = gFalse; |
77 | 928 | if (dict->lookup("Count", &obj1)->isInt()) { |
78 | 174 | if (obj1.getInt() > 0) { |
79 | 140 | startsOpen = gTrue; |
80 | 140 | } |
81 | 174 | } |
82 | 928 | obj1.free(); |
83 | | |
84 | 928 | pageNum = -1; |
85 | 928 | } |
86 | | |
87 | 928 | OutlineItem::~OutlineItem() { |
88 | 928 | close(); |
89 | 928 | if (title) { |
90 | 194 | delete title; |
91 | 194 | } |
92 | 928 | if (action) { |
93 | 480 | delete action; |
94 | 480 | } |
95 | 928 | itemRef.free(); |
96 | 928 | firstRef.free(); |
97 | 928 | lastRef.free(); |
98 | 928 | nextRef.free(); |
99 | 928 | } |
100 | | |
101 | | GList *OutlineItem::readItemList(Object *firstItemRef, Object *lastItemRef, |
102 | 304 | OutlineItem *parentA, XRef *xrefA) { |
103 | 304 | GList *items; |
104 | 304 | OutlineItem *item, *sibling; |
105 | 304 | Object obj; |
106 | 304 | Object *p; |
107 | 304 | OutlineItem *ancestor; |
108 | 304 | int i; |
109 | | |
110 | 304 | items = new GList(); |
111 | 304 | if (!firstItemRef->isRef() || !lastItemRef->isRef()) { |
112 | 0 | return items; |
113 | 0 | } |
114 | 304 | p = firstItemRef; |
115 | 976 | do { |
116 | 976 | if (!p->fetch(xrefA, &obj)->isDict()) { |
117 | 48 | obj.free(); |
118 | 48 | break; |
119 | 48 | } |
120 | 928 | item = new OutlineItem(p, obj.getDict(), parentA, xrefA); |
121 | 928 | obj.free(); |
122 | | |
123 | | // check for loops with parents |
124 | 928 | for (ancestor = parentA; ancestor; ancestor = ancestor->parent) { |
125 | 0 | if (p->getRefNum() == ancestor->itemRef.getRefNum() && |
126 | 0 | p->getRefGen() == ancestor->itemRef.getRefGen()) { |
127 | 0 | error(errSyntaxError, -1, "Loop detected in outline"); |
128 | 0 | break; |
129 | 0 | } |
130 | 0 | } |
131 | 928 | if (ancestor) { |
132 | 0 | delete item; |
133 | 0 | break; |
134 | 0 | } |
135 | | |
136 | | // check for loops with siblings |
137 | 1.99k | for (i = 0; i < items->getLength(); ++i) { |
138 | 1.21k | sibling = (OutlineItem *)items->get(i); |
139 | 1.21k | if (p->getRefNum() == sibling->itemRef.getRefNum() && |
140 | 144 | p->getRefGen() == sibling->itemRef.getRefGen()) { |
141 | 144 | error(errSyntaxError, -1, "Loop detected in outline"); |
142 | 144 | break; |
143 | 144 | } |
144 | 1.21k | } |
145 | 928 | if (i < items->getLength()) { |
146 | 144 | delete item; |
147 | 144 | break; |
148 | 144 | } |
149 | | |
150 | 784 | items->append(item); |
151 | 784 | if (p->getRefNum() == lastItemRef->getRef().num && |
152 | 4 | p->getRefGen() == lastItemRef->getRef().gen) { |
153 | 3 | break; |
154 | 3 | } |
155 | 781 | p = &item->nextRef; |
156 | 781 | if (!p->isRef()) { |
157 | 109 | break; |
158 | 109 | } |
159 | 781 | } while (p); |
160 | 304 | return items; |
161 | 304 | } |
162 | | |
163 | 0 | void OutlineItem::open() { |
164 | 0 | if (!kids) { |
165 | 0 | kids = readItemList(&firstRef, &lastRef, this, xref); |
166 | 0 | } |
167 | 0 | } |
168 | | |
169 | 928 | void OutlineItem::close() { |
170 | 928 | if (kids) { |
171 | 0 | deleteGList(kids, OutlineItem); |
172 | 0 | kids = NULL; |
173 | 0 | } |
174 | 928 | } |
175 | | |
176 | 0 | Unicode *OutlineItem::getTitle() { |
177 | 0 | return title ? title->getUnicode() : (Unicode *)NULL; |
178 | 0 | } |
179 | | |
180 | 0 | int OutlineItem::getTitleLength() { |
181 | 0 | return title ? title->getLength() : 0; |
182 | 0 | } |