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don't pass temporary string objects as parameters
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1 /**
2  * \file TocBackend.C
3  * This file is part of LyX, the document processor.
4  * Licence details can be found in the file COPYING.
5  *
6  * \author Jean-Marc Lasgouttes
7  * \author Angus Leeming
8  * \author Abdelrazak Younes
9  *
10  * Full author contact details are available in file CREDITS.
11  */
12
13 #include <config.h>
14
15 #include "TocBackend.h"
16
17 #include "buffer.h"
18 #include "bufferparams.h"
19 #include "FloatList.h"
20 #include "funcrequest.h"
21 #include "LyXAction.h"
22 #include "paragraph.h"
23 #include "debug.h"
24
25 #include "insets/insetoptarg.h"
26
27 #include "support/convert.h"
28
29
30 namespace lyx {
31
32 using std::vector;
33 using std::string;
34
35
36 ///////////////////////////////////////////////////////////////////////////
37 // TocItem implementation
38
39 TocItem::TocItem(ParConstIterator const & par_it, int d,
40                 docstring const & s)
41                 : par_it_(par_it), depth_(d), str_(s)
42 {
43 /*
44         if (!uid_.empty())
45                 return;
46
47         size_t pos = s.find(" ");
48         if (pos == string::npos) {
49                 // Non labelled item
50                 uid_ = s;
51                 return;
52         }
53
54         string s2 = s.substr(0, pos);
55
56         if (s2 == "Chapter" || s2 == "Part") {
57                 size_t pos2 = s.find(" ", pos + 1);
58                 if (pos2 == string::npos) {
59                         // Unnumbered Chapter?? This should not happen.
60                         uid_ = s.substr(pos + 1);
61                         return;
62                 }
63                 // Chapter or Part
64                 uid_ = s.substr(pos2 + 1);
65                 return;
66         }
67         // Numbered Item.
68         uid_ = s.substr(pos + 1);
69         */
70 }
71
72 bool const TocItem::isValid() const
73 {
74         return depth_ != -1;
75 }
76
77
78 int const TocItem::id() const
79 {
80         return par_it_->id();
81 }
82
83
84 int const TocItem::depth() const
85 {
86         return depth_;
87 }
88
89
90 docstring const & TocItem::str() const
91 {
92         return str_;
93 }
94
95
96 docstring const TocItem::asString() const
97 {
98         return docstring(4 * depth_, ' ') + str_;
99 }
100
101
102 FuncRequest TocItem::action() const
103 {
104         return FuncRequest(LFUN_PARAGRAPH_GOTO, convert<string>(id()));
105 }
106
107
108
109
110
111 ///////////////////////////////////////////////////////////////////////////
112 // TocBackend implementation
113
114 Toc const & TocBackend::toc(std::string const & type) const
115 {
116         // Is the type already supported?
117         TocList::const_iterator it = tocs_.find(type);
118         BOOST_ASSERT(it != tocs_.end());
119
120         return it->second;
121 }
122
123
124 bool TocBackend::addType(std::string const & type)
125 {
126         // Is the type already supported?
127         TocList::iterator toclist_it = tocs_.find(type);
128         if (toclist_it != tocs_.end())
129                 return false;
130
131         tocs_.insert(make_pair(type, Toc()));
132         types_.push_back(type);
133
134         return true;
135 }
136
137
138 void TocBackend::update()
139 {
140         tocs_.clear();
141         types_.clear();
142
143         BufferParams const & bufparams = buffer_->params();
144         const int min_toclevel = bufparams.getLyXTextClass().min_toclevel();
145
146         ParConstIterator pit = buffer_->par_iterator_begin();
147         ParConstIterator end = buffer_->par_iterator_end();
148         for (; pit != end; ++pit) {
149
150                 // the string that goes to the toc (could be the optarg)
151                 docstring tocstring;
152
153                 // For each paragraph, traverse its insets and let them add
154                 // their toc items
155                 InsetList::const_iterator it = pit->insetlist.begin();
156                 InsetList::const_iterator end = pit->insetlist.end();
157                 for (; it != end; ++it) {
158                         it->inset->addToToc(tocs_, *buffer_);
159                         switch (it->inset->lyxCode()) {
160                         case InsetBase::OPTARG_CODE: {
161                                 if (!tocstring.empty())
162                                         break;
163                                 Paragraph const & par = *static_cast<InsetOptArg*>(it->inset)->paragraphs().begin();
164                                 if (!pit->getLabelstring().empty())
165                                         tocstring = pit->getLabelstring() + ' ';
166                                 tocstring += par.asString(*buffer_, false);
167                                 break;
168                         }
169                         default:
170                                 break;
171                         }
172                 }
173
174                 /// now the toc entry for the paragraph
175                 int const toclevel = pit->layout()->toclevel;
176                 if (toclevel != LyXLayout::NOT_IN_TOC
177                     && toclevel >= min_toclevel
178                     && toclevel <= bufparams.tocdepth) {
179                         // insert this into the table of contents
180                         if (tocstring.empty())
181                                 tocstring = pit->asString(*buffer_, true);
182                         TocItem const item(pit, toclevel - min_toclevel, tocstring);
183                         tocs_["tableofcontents"].push_back(item);
184                 }
185         }
186
187         TocList::iterator it = tocs_.begin();
188         for (; it != tocs_.end(); ++it)
189                 types_.push_back(it->first);
190 }
191
192
193 TocIterator const TocBackend::item(
194         std::string const & type, ParConstIterator const & par_it) const
195 {
196         TocList::const_iterator toclist_it = tocs_.find(type);
197         // Is the type supported?
198         BOOST_ASSERT(toclist_it != tocs_.end());
199
200         Toc const & toc_vector = toclist_it->second;
201         TocIterator last = toc_vector.begin();
202         TocIterator it = toc_vector.end();
203         --it;
204
205         for (; it != last; --it) {
206                 
207                 // A good solution for Items inside insets would be to do:
208                 //
209                 //if (std::distance(it->par_it_, current) <= 0)
210                 //      return it;
211                 //
212                 // But for an unknown reason, std::distance(current, it->par_it_) always
213                 // returns  a positive value and std::distance(it->par_it_, current) takes forever...
214                 // So for now, we do:
215                 if (it->par_it_.pit() <= par_it.pit())
216                         return it;
217         }
218
219         // We are before the first Toc Item:
220         return last;
221 }
222
223
224 void TocBackend::asciiTocList(string const & type, odocstream & os) const
225 {
226         TocList::const_iterator cit = tocs_.find(type);
227         if (cit != tocs_.end()) {
228                 TocIterator ccit = cit->second.begin();
229                 TocIterator end = cit->second.end();
230                 for (; ccit != end; ++ccit)
231                         os << ccit->asString() << '\n';
232         }
233 }
234
235
236 } // namespace lyx