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1 /**
2  * \file bufferlist.C
3  * This file is part of LyX, the document processor.
4  * Licence details can be found in the file COPYING.
5  *
6  * \author Lars Gullik Bjønnes
7  *
8  * Full author contact details are available in file CREDITS
9  */
10
11 #include <config.h>
12
13 #include "bufferlist.h"
14 #include "lyx_main.h"
15 #include "lastfiles.h"
16 #include "debug.h"
17 #include "lyxrc.h"
18 #include "lyxtext.h"
19 #include "lyx_cb.h"
20 #include "bufferview_funcs.h"
21 #include "BufferView.h"
22 #include "gettext.h"
23 #include "frontends/LyXView.h"
24 #include "vc-backend.h"
25 #include "TextCache.h"
26 #include "lyxlex.h"
27
28 #include "frontends/Alert.h"
29
30 #include "support/FileInfo.h"
31 #include "support/filetools.h"
32 #include "support/lyxmanip.h"
33 #include "support/lyxfunctional.h"
34 #include "support/LAssert.h"
35
36 #include <boost/bind.hpp>
37
38 #include <cassert>
39 #include <algorithm>
40 #include <functional>
41
42
43 using std::vector;
44 using std::find;
45 using std::endl;
46 using std::find_if;
47 using std::for_each;
48 using std::mem_fun;
49
50 extern BufferView * current_view;
51
52
53 BufferList::BufferList()
54 {}
55
56
57 bool BufferList::empty() const
58 {
59         return bstore.empty();
60 }
61
62
63 bool BufferList::quitWriteBuffer(Buffer * buf)
64 {
65         string file;
66         if (buf->isUnnamed())
67                 file = OnlyFilename(buf->fileName());
68         else
69                 file = MakeDisplayPath(buf->fileName(), 30);
70
71         string text = bformat(_("The document %1$s has unsaved changes.\n\n"
72                 "Do you want to save the document?"), file);
73         int const ret = Alert::prompt(_("Save changed document?"),
74                 text, 0, 2, _("&Save Changes"), _("&Discard Changes"), _("&Cancel"));
75
76         if (ret == 0) {
77                 // FIXME: WriteAs can be asynch !
78                 // but not right now...maybe we should remove that
79
80                 bool succeeded;
81
82                 if (buf->isUnnamed())
83                         succeeded = WriteAs(current_view, buf);
84                 else
85                         succeeded = MenuWrite(current_view, buf);
86
87                 if (!succeeded)
88                         return false;
89         } else if (ret == 1) {
90                 // if we crash after this we could
91                 // have no autosave file but I guess
92                 // this is really inprobable (Jug)
93                 if (buf->isUnnamed())
94                         removeAutosaveFile(buf->fileName());
95
96         } else {
97                 return false;
98         }
99
100         return true;
101 }
102
103
104 bool BufferList::quitWriteAll()
105 {
106         BufferStorage::iterator it = bstore.begin();
107         BufferStorage::iterator end = bstore.end();
108         for (; it != end; ++it) {
109                 if ((*it)->isClean())
110                         continue;
111
112                 if (!quitWriteBuffer(*it))
113                         return false;
114         }
115
116         return true;
117 }
118
119
120 void BufferList::release(Buffer * buf)
121 {
122         lyx::Assert(buf);
123         BufferStorage::iterator it = find(bstore.begin(), bstore.end(), buf);
124         if (it != bstore.end()) {
125                 // Make sure that we don't store a LyXText in
126                 // the textcache that points to the buffer
127                 // we just deleted.
128                 Buffer * tmp = (*it);
129                 bstore.erase(it);
130                 textcache.removeAllWithBuffer(tmp);
131                 delete tmp;
132         }
133 }
134
135
136 Buffer * BufferList::newBuffer(string const & s, bool ronly)
137 {
138         Buffer * tmpbuf = new Buffer(s, ronly);
139         tmpbuf->params.useClassDefaults();
140         lyxerr[Debug::INFO] << "Assigning to buffer "
141                             << bstore.size() << endl;
142         bstore.push_back(tmpbuf);
143         return tmpbuf;
144 }
145
146
147 void BufferList::closeAll()
148 {
149         // Since we are closing we can just as well delete all
150         // in the textcache this will also speed the closing/quiting up a bit.
151         textcache.clear();
152
153         while (!bstore.empty()) {
154                 close(bstore.front(), false);
155         }
156 }
157
158
159 bool BufferList::close(Buffer * buf, bool ask)
160 {
161         lyx::Assert(buf);
162
163         // FIXME: is the quitting check still necessary ?
164         if (!ask || buf->isClean() || quitting || buf->paragraphs.empty()) {
165                 release(buf);
166                 return true;
167         }
168
169         string fname;
170         if (buf->isUnnamed())
171                 fname = OnlyFilename(buf->fileName());
172         else
173                 fname = MakeDisplayPath(buf->fileName(), 30);
174
175         string text = bformat(_("The document %1$s has unsaved changes.\n\n"
176                 "Do you want to save the document?"), fname);
177         int const ret = Alert::prompt(_("Save changed document?"),
178                 text, 0, 2, _("&Save Changes"), _("&Discard Changes"), _("&Cancel"));
179
180         if (ret == 0) {
181                 if (buf->isUnnamed()) {
182                         if (!WriteAs(current_view, buf))
183                                 return false;
184                 } else if (buf->save()) {
185                         lastfiles->newFile(buf->fileName());
186                 } else {
187                         return false;
188                 }
189         } else if (ret == 2) {
190                 return false;
191         }
192
193         if (buf->isUnnamed()) {
194                 removeAutosaveFile(buf->fileName());
195         }
196
197         release(buf);
198         return true;
199 }
200
201
202 vector<string> const BufferList::getFileNames() const
203 {
204         vector<string> nvec;
205         std::copy(bstore.begin(), bstore.end(),
206                   lyx::back_inserter_fun(nvec, &Buffer::fileName));
207         return nvec;
208 }
209
210
211 Buffer * BufferList::first()
212 {
213         if (bstore.empty())
214                 return 0;
215         return bstore.front();
216 }
217
218
219 Buffer * BufferList::getBuffer(unsigned int choice)
220 {
221         if (choice >= bstore.size())
222                 return 0;
223         return bstore[choice];
224 }
225
226
227 void BufferList::updateIncludedTeXfiles(string const & mastertmpdir)
228 {
229         BufferStorage::iterator it = bstore.begin();
230         BufferStorage::iterator end = bstore.end();
231         for (; it != end; ++it) {
232                 if (!(*it)->isDepClean(mastertmpdir)) {
233                         string writefile = mastertmpdir;
234                         writefile += '/';
235                         writefile += (*it)->getLatexName();
236                         (*it)->makeLaTeXFile(writefile, mastertmpdir,
237                                              false, true);
238                         (*it)->markDepClean(mastertmpdir);
239                 }
240         }
241 }
242
243
244 void BufferList::emergencyWriteAll()
245 {
246         for_each(bstore.begin(), bstore.end(),
247                  boost::bind(&BufferList::emergencyWrite, this, _1));
248 }
249
250
251 void BufferList::emergencyWrite(Buffer * buf)
252 {
253         // assert(buf) // this is not good since C assert takes an int
254                        // and a pointer is a long (JMarc)
255         assert(buf != 0); // use c assert to avoid a loop
256
257
258         // No need to save if the buffer has not changed.
259         if (buf->isClean())
260                 return;
261
262         string const doc = buf->isUnnamed()
263                 ? OnlyFilename(buf->fileName()) : buf->fileName();
264
265         lyxerr << bformat(_("LyX: Attempting to save document %1$s"), doc) << endl;
266
267         // We try to save three places:
268         // 1) Same place as document. Unless it is an unnamed doc.
269         if (!buf->isUnnamed()) {
270                 string s = buf->fileName();
271                 s += ".emergency";
272                 lyxerr << "  " << s << endl;
273                 if (buf->writeFile(s)) {
274                         buf->markClean();
275                         lyxerr << _("  Save seems successful. Phew.") << endl;
276                         return;
277                 } else {
278                         lyxerr << _("  Save failed! Trying...") << endl;
279                 }
280         }
281
282         // 2) In HOME directory.
283         string s = AddName(GetEnvPath("HOME"), buf->fileName());
284         s += ".emergency";
285         lyxerr << ' ' << s << endl;
286         if (buf->writeFile(s)) {
287                 buf->markClean();
288                 lyxerr << _("  Save seems successful. Phew.") << endl;
289                 return;
290         }
291
292         lyxerr << _("  Save failed! Trying...") << endl;
293
294         // 3) In "/tmp" directory.
295         // MakeAbsPath to prepend the current
296         // drive letter on OS/2
297         s = AddName(MakeAbsPath("/tmp/"), buf->fileName());
298         s += ".emergency";
299         lyxerr << ' ' << s << endl;
300         if (buf->writeFile(s)) {
301                 buf->markClean();
302                 lyxerr << _("  Save seems successful. Phew.") << endl;
303                 return;
304         }
305         lyxerr << _("  Save failed! Bummer. Document is lost.") << endl;
306 }
307
308
309
310 Buffer * BufferList::readFile(string const & s, bool ronly)
311 {
312         string ts(s);
313         string e = OnlyPath(s);
314         string a = e;
315         // File information about normal file
316         FileInfo fileInfo2(s);
317
318         if (!fileInfo2.exist()) {
319                 string const file = MakeDisplayPath(s, 50);
320                 string text = bformat(_("The specified document\n%1$s"
321                         "\ncould not be read."),        file);
322                 Alert::error(_("Could not read document"), text);
323                 return 0;
324         }
325
326         Buffer * b = newBuffer(s, ronly);
327
328         // Check if emergency save file exists and is newer.
329         e += OnlyFilename(s) + ".emergency";
330         FileInfo fileInfoE(e);
331
332         bool use_emergency = false;
333
334         if (fileInfoE.exist() && fileInfo2.exist()) {
335                 if (fileInfoE.getModificationTime()
336                     > fileInfo2.getModificationTime()) {
337                         string const file = MakeDisplayPath(s, 20);
338                         string text = bformat(_("An emergency save of the document %1$s exists.\n"
339                                 "\nRecover emergency save?"), file);
340                         int const ret = Alert::prompt(_("Load emergency save?"),
341                                 text, 0, 1, _("&Recover"), _("&Load Original"));
342
343                         if (ret == 0) {
344                                 ts = e;
345                                 // the file is not saved if we load the
346                                 // emergency file.
347                                 b->markDirty();
348                                 use_emergency = true;
349                         }
350                 }
351         }
352
353         if (!use_emergency) {
354                 // Now check if autosave file is newer.
355                 a += '#';
356                 a += OnlyFilename(s);
357                 a += '#';
358                 FileInfo fileInfoA(a);
359                 if (fileInfoA.exist() && fileInfo2.exist()) {
360                         if (fileInfoA.getModificationTime()
361                             > fileInfo2.getModificationTime()) {
362                                 string const file = MakeDisplayPath(s, 20);
363                                 string text = bformat(_("The backup of the document %1$s is newer.\n\n" 
364                                         "Load the backup instead?"), file);
365                                 int const ret = Alert::prompt(_("Load backup?"),
366                                         text, 0, 1, _("&Load backup"), _("Load &original"));
367
368                                 if (ret == 0) {
369                                         ts = a;
370                                         // the file is not saved if we load the
371                                         // autosave file.
372                                         b->markDirty();
373                                 } else {
374                                         // Here, we should delete the autosave
375                                         lyx::unlink(a);
376                                 }
377                         }
378                 }
379         }
380         // not sure if this is the correct place to begin LyXLex
381         LyXLex lex(0, 0);
382         lex.setFile(ts);
383         if (b->readFile(lex, ts))
384                 return b;
385         else {
386                 release(b);
387                 return 0;
388         }
389 }
390
391
392 bool BufferList::exists(string const & s) const
393 {
394         return find_if(bstore.begin(), bstore.end(),
395                        lyx::compare_memfun(&Buffer::fileName, s))
396                 != bstore.end();
397 }
398
399
400 bool BufferList::isLoaded(Buffer const * b) const
401 {
402         lyx::Assert(b);
403
404         BufferStorage::const_iterator cit =
405                 find(bstore.begin(), bstore.end(), b);
406         return cit != bstore.end();
407 }
408
409
410 Buffer * BufferList::getBuffer(string const & s)
411 {
412         BufferStorage::iterator it =
413                 find_if(bstore.begin(), bstore.end(),
414                         lyx::compare_memfun(&Buffer::fileName, s));
415         return it != bstore.end() ? (*it) : 0;
416 }
417
418
419 Buffer * BufferList::newFile(string const & name, string tname, bool isNamed)
420 {
421         // get a free buffer
422         Buffer * b = newBuffer(name);
423
424         // use defaults.lyx as a default template if it exists.
425         if (tname.empty()) {
426                 tname = LibFileSearch("templates", "defaults.lyx");
427         }
428         if (!tname.empty()) {
429                 bool templateok = false;
430                 LyXLex lex(0, 0);
431                 lex.setFile(tname);
432                 if (lex.isOK()) {
433                         if (b->readFile(lex, tname)) {
434                                 templateok = true;
435                         }
436                 }
437                 if (!templateok) {
438                         string const file = MakeDisplayPath(tname, 50);
439                         string text  = bformat(_("The specified document template\n%1$s\n"
440                                 "could not be read."), file);
441                         Alert::error(_("Could not read template"), text);
442                         // no template, start with empty buffer
443                         b->paragraphs.push_back(new Paragraph);
444                         b->paragraphs.begin()->layout(b->params.getLyXTextClass().defaultLayout());
445                 }
446         } else {  // start with empty buffer
447                 b->paragraphs.push_back(new Paragraph);
448                 b->paragraphs.begin()->layout(b->params.getLyXTextClass().defaultLayout());
449         }
450
451         if (!isNamed) {
452                 b->setUnnamed();
453                 b->setFileName(name);
454         }
455
456         b->setReadonly(false);
457         b->updateDocLang(b->params.language);
458
459         return b;
460 }
461
462
463 Buffer * BufferList::loadLyXFile(string const & filename, bool tolastfiles)
464 {
465         // get absolute path of file and add ".lyx" to the filename if
466         // necessary
467         string s = FileSearch(string(), filename, "lyx");
468         if (s.empty()) {
469                 s = filename;
470         }
471
472         // file already open?
473         if (exists(s)) {
474                 string const file = MakeDisplayPath(s, 20);
475                 string text = bformat(_("The document %1$s is already loaded.\n\n"
476                         "Do you want to revert to the saved version?"), file);
477                 int const ret = Alert::prompt(_("Revert to saved document?"),
478                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
479
480                 if (ret == 0) {
481                         // FIXME: should be LFUN_REVERT
482                         if (!close(getBuffer(s), false)) {
483                                 return 0;
484                         }
485                         // Fall through to new load. (Asger)
486                 } else {
487                         // Here, we pretend that we just loaded the
488                         // open document
489                         return getBuffer(s);
490                 }
491         }
492
493         Buffer * b = 0;
494         bool ro = false;
495         switch (IsFileWriteable(s)) {
496         case 0:
497                 ro = true;
498                 // Fall through
499         case 1:
500                 b = readFile(s, ro);
501                 if (b) {
502                         b->lyxvc.file_found_hook(s);
503                 }
504                 break; //fine- it's r/w
505         case -1: {
506                 string const file = MakeDisplayPath(s, 20);
507                 // Here we probably should run
508                 if (LyXVC::file_not_found_hook(s)) {
509                         string text = bformat(_("Do you want to retrieve the document"
510                                 " %1$s from version control?"), file);
511                         int const ret = Alert::prompt(_("Retrieve from version control?"),
512                                 text, 0, 1, _("&Retrieve"), _("&Cancel"));
513
514                         if (ret == 0) {
515                                 // How can we know _how_ to do the checkout?
516                                 // With the current VC support it has to be,
517                                 // a RCS file since CVS do not have special ,v files.
518                                 RCS::retrieve(s);
519                                 return loadLyXFile(filename, tolastfiles);
520                         }
521                 }
522
523                 string text = bformat(_("The document %1$s does not yet exist.\n\n"
524                         "Do you want to create a new document?"), file);
525                 int const ret = Alert::prompt(_("Create new document?"),
526                         text, 0, 1, _("&Create"), _("Cancel"));
527
528                 if (ret == 0)
529                         b = newFile(s, string(), true);
530
531                 break;
532                 }
533         }
534
535         if (b && tolastfiles)
536                 lastfiles->newFile(b->fileName());
537
538         return b;
539 }
540
541
542 void BufferList::setCurrentAuthor(string const & name, string const & email)
543 {
544         BufferStorage::iterator it = bstore.begin();
545         BufferStorage::iterator end = bstore.end();
546         for (; it != end; ++it) {
547                 (*it)->authors().record(0, Author(name, email));
548         }
549 }