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1
2 /**
3  * \file GuiCitation.cpp
4  * This file is part of LyX, the document processor.
5  * Licence details can be found in the file COPYING.
6  *
7  * \author Angus Leeming
8  * \author Kalle Dalheimer
9  * \author Abdelrazak Younes
10  * \author Richard Heck
11  *
12  * Full author contact details are available in file CREDITS.
13  */
14
15 #include <config.h>
16
17 #include "GuiCitation.h"
18
19 #include "GuiSelectionManager.h"
20 #include "qt_helpers.h"
21
22 #include "Buffer.h"
23 #include "BiblioInfo.h"
24 #include "BufferParams.h"
25 #include "FuncRequest.h"
26
27 #include "insets/InsetCommand.h"
28
29 #include "support/debug.h"
30 #include "support/docstring.h"
31 #include "support/gettext.h"
32 #include "support/lstrings.h"
33
34 #include <QCloseEvent>
35 #include <QSettings>
36 #include <QShowEvent>
37 #include <QVariant>
38
39 #include <vector>
40 #include <string>
41
42 #undef KeyPress
43
44 #include <boost/regex.hpp>
45
46 #include <algorithm>
47 #include <string>
48 #include <vector>
49
50 using namespace std;
51 using namespace lyx::support;
52
53 namespace lyx {
54 namespace frontend {
55
56 static vector<CiteStyle> citeStyles_;
57
58
59 template<typename String>
60 static QStringList to_qstring_list(vector<String> const & v)
61 {
62         QStringList qlist;
63
64         for (size_t i = 0; i != v.size(); ++i) {
65                 if (v[i].empty())
66                         continue;
67                 qlist.append(lyx::toqstr(v[i]));
68         }
69         return qlist;
70 }
71
72
73 static vector<lyx::docstring> to_docstring_vector(QStringList const & qlist)
74 {
75         vector<lyx::docstring> v;
76         for (int i = 0; i != qlist.size(); ++i) {
77                 if (qlist[i].isEmpty())
78                         continue;
79                 v.push_back(lyx::qstring_to_ucs4(qlist[i]));
80         }
81         return v;
82 }
83
84
85 GuiCitation::GuiCitation(GuiView & lv)
86         : DialogView(lv, "citation", qt_("Citation")),
87           params_(insetCode("citation"))
88 {
89         setupUi(this);
90
91         connect(citationStyleCO, SIGNAL(activated(int)),
92                 this, SLOT(on_citationStyleCO_currentIndexChanged(int)));
93         connect(fulllistCB, SIGNAL(clicked()),
94                 this, SLOT(changed()));
95         connect(forceuppercaseCB, SIGNAL(clicked()),
96                 this, SLOT(changed()));
97         connect(textBeforeED, SIGNAL(textChanged(QString)),
98                 this, SLOT(changed()));
99         connect(textAfterED, SIGNAL(textChanged(QString)),
100                 this, SLOT(changed()));
101         connect(findLE, SIGNAL(returnPressed()), 
102                 this, SLOT(on_searchPB_clicked()));
103         connect(textBeforeED, SIGNAL(returnPressed()),
104                 this, SLOT(on_okPB_clicked()));
105         connect(textAfterED, SIGNAL(returnPressed()),
106                 this, SLOT(on_okPB_clicked()));
107
108         selectionManager = new GuiSelectionManager(availableLV, selectedLV, 
109                         addPB, deletePB, upPB, downPB, &available_model_, &selected_model_);
110         connect(selectionManager, SIGNAL(selectionChanged()),
111                 this, SLOT(setCitedKeys()));
112         connect(selectionManager, SIGNAL(updateHook()),
113                 this, SLOT(updateControls()));
114         connect(selectionManager, SIGNAL(okHook()),
115                 this, SLOT(on_okPB_clicked()));
116
117         // FIXME: the sizeHint() for this is _way_ too high
118         infoML->setFixedHeight(60);
119 }
120
121
122 GuiCitation::~GuiCitation()
123 {
124         delete selectionManager;
125 }
126
127
128 void GuiCitation::closeEvent(QCloseEvent * e)
129 {
130         clearSelection();
131         DialogView::closeEvent(e);
132 }
133
134
135 void GuiCitation::applyView()
136 {
137         int const choice = max(0, citationStyleCO->currentIndex());
138         style_ = choice;
139         bool const full  = fulllistCB->isChecked();
140         bool const force = forceuppercaseCB->isChecked();
141
142         QString const before = textBeforeED->text();
143         QString const after = textAfterED->text();
144
145         apply(choice, full, force, before, after);
146 }
147
148
149 void GuiCitation::showEvent(QShowEvent * e)
150 {
151         findLE->clear();
152         availableLV->setFocus();
153         DialogView::showEvent(e);
154 }
155
156
157 void GuiCitation::on_okPB_clicked()
158 {
159         applyView();
160         clearSelection();
161         hide();
162 }
163
164
165 void GuiCitation::on_cancelPB_clicked()
166 {
167         clearSelection();
168         hide();
169 }
170
171
172 void GuiCitation::on_applyPB_clicked()
173 {
174         applyView();
175 }
176
177
178 void GuiCitation::on_restorePB_clicked()
179 {
180         init();
181 }
182
183
184 void GuiCitation::updateControls()
185 {
186         BiblioInfo const & bi = bibInfo();
187         updateControls(bi);
188 }
189
190
191 // The main point of separating this out is that the fill*() methods
192 // called in update() do not need to be called for INTERNAL updates,
193 // such as when addPB is pressed, as the list of fields, entries, etc,
194 // will not have changed. At the moment, however, the division between
195 // fillStyles() and updateStyle() doesn't lend itself to dividing the
196 // two methods, though they should be divisible.
197 void GuiCitation::updateControls(BiblioInfo const & bi)
198 {
199         QModelIndex idx = selectionManager->getSelectedIndex();
200         updateInfo(bi, idx);
201         setButtons();
202
203         textBeforeED->setText(toqstr(params_["before"]));
204         textAfterED->setText(toqstr(params_["after"]));
205         fillStyles(bi);
206         updateStyle();
207 }
208
209
210 void GuiCitation::updateFormatting(CiteStyle currentStyle)
211 {
212         CiteEngine const engine = citeEngine();
213         bool const natbib_engine =
214                 engine == ENGINE_NATBIB_AUTHORYEAR ||
215                 engine == ENGINE_NATBIB_NUMERICAL;
216         bool const basic_engine = engine == ENGINE_BASIC;
217
218         bool const haveSelection = 
219                 selectedLV->model()->rowCount() > 0;
220
221         bool const isNocite = currentStyle == NOCITE;
222
223         bool const isCiteyear =
224                 currentStyle == CITEYEAR ||
225                 currentStyle == CITEYEARPAR;
226
227         fulllistCB->setEnabled(natbib_engine && haveSelection && !isNocite
228                 && !isCiteyear);
229         forceuppercaseCB->setEnabled(natbib_engine && haveSelection
230                 && !isNocite && !isCiteyear);
231         textBeforeED->setEnabled(!basic_engine && haveSelection && !isNocite);
232         textBeforeLA->setEnabled(!basic_engine && haveSelection && !isNocite);
233         textAfterED->setEnabled(haveSelection && !isNocite);
234         textAfterLA->setEnabled(haveSelection && !isNocite);
235         citationStyleCO->setEnabled(haveSelection);
236         citationStyleLA->setEnabled(haveSelection);
237 }
238
239
240 void GuiCitation::updateStyle()
241 {
242         string const & command = params_.getCmdName();
243
244         // Find the style of the citekeys
245         vector<CiteStyle> const & styles = citeStyles_;
246         CitationStyle const cs = citationStyleFromString(command);
247
248         vector<CiteStyle>::const_iterator cit =
249                 std::find(styles.begin(), styles.end(), cs.style);
250
251         // restore the latest natbib style
252         if (style_ >= 0 && style_ < citationStyleCO->count())
253                 citationStyleCO->setCurrentIndex(style_);
254         else
255                 citationStyleCO->setCurrentIndex(0);
256
257         if (cit != styles.end()) {
258                 int const i = int(cit - styles.begin());
259                 citationStyleCO->setCurrentIndex(i);
260                 fulllistCB->setChecked(cs.full);
261                 forceuppercaseCB->setChecked(cs.forceUpperCase);
262         } else {
263                 fulllistCB->setChecked(false);
264                 forceuppercaseCB->setChecked(false);
265         }
266         updateFormatting(cs.style);
267 }
268
269
270 // This one needs to be called whenever citationStyleCO needs
271 // to be updated---and this would be on anything that changes the
272 // selection in selectedLV, or on a general update.
273 void GuiCitation::fillStyles(BiblioInfo const & bi)
274 {
275         QStringList selected_keys = selected_model_.stringList();
276         int curr = selectedLV->model()->rowCount() - 1;
277
278         if (curr < 0 || selected_keys.empty()) {
279                 citationStyleCO->clear();
280                 citationStyleCO->setEnabled(false);
281                 citationStyleLA->setEnabled(false);
282                 return;
283         }
284
285         int const oldIndex = citationStyleCO->currentIndex();
286
287         if (!selectedLV->selectionModel()->selectedIndexes().empty())
288                 curr = selectedLV->selectionModel()->selectedIndexes()[0].row();
289
290         QStringList sty = citationStyles(bi, curr);
291         citationStyleCO->clear();
292
293         if (sty.isEmpty()) { 
294                 // some error
295                 citationStyleCO->setEnabled(false);
296                 citationStyleLA->setEnabled(false);
297                 return;
298         }
299         
300         citationStyleCO->insertItems(0, sty);
301         citationStyleCO->setEnabled(true);
302         citationStyleLA->setEnabled(true);
303
304         if (oldIndex != -1 && oldIndex < citationStyleCO->count())
305                 citationStyleCO->setCurrentIndex(oldIndex);
306 }
307
308
309 void GuiCitation::fillFields(BiblioInfo const & bi)
310 {
311         fieldsCO->blockSignals(true);
312         int const oldIndex = fieldsCO->currentIndex();
313         fieldsCO->clear();
314         QStringList const fields = to_qstring_list(bi.getFields());
315         fieldsCO->insertItem(0, qt_("All fields"));
316         fieldsCO->insertItem(1, qt_("Keys"));
317         fieldsCO->insertItems(2, fields);
318         if (oldIndex != -1 && oldIndex < fieldsCO->count())
319                 fieldsCO->setCurrentIndex(oldIndex);
320         fieldsCO->blockSignals(false);
321 }
322
323
324 void GuiCitation::fillEntries(BiblioInfo const & bi)
325 {
326         entriesCO->blockSignals(true);
327         int const oldIndex = entriesCO->currentIndex();
328         entriesCO->clear();
329         QStringList const entries = to_qstring_list(bi.getEntries());
330         entriesCO->insertItem(0, qt_("All entry types"));
331         entriesCO->insertItems(1, entries);
332         if (oldIndex != -1 && oldIndex < entriesCO->count())
333                 entriesCO->setCurrentIndex(oldIndex);
334         entriesCO->blockSignals(false);
335 }
336
337
338 bool GuiCitation::isSelected(QModelIndex const & idx)
339 {
340         QString const str = idx.data().toString();
341         return selected_model_.stringList().contains(str);
342 }
343
344
345 void GuiCitation::setButtons()
346 {
347         selectionManager->update();
348         int const srows = selectedLV->model()->rowCount();
349         applyPB->setEnabled(srows > 0);
350         okPB->setEnabled(srows > 0);
351 }
352
353
354 void GuiCitation::updateInfo(BiblioInfo const & bi, QModelIndex const & idx)
355 {
356         if (!idx.isValid() || bi.empty()) {
357                 infoML->document()->clear();
358                 return;
359         }
360
361         QString const keytxt = toqstr(
362                 bi.getInfo(qstring_to_ucs4(idx.data().toString())));
363         infoML->document()->setPlainText(keytxt);
364 }
365
366
367 void GuiCitation::findText(QString const & text, bool reset)
368 {
369         //"All Fields" and "Keys" are the first two
370         int index = fieldsCO->currentIndex() - 2; 
371         BiblioInfo const & bi = bibInfo();
372         vector<docstring> const & fields = bi.getFields();
373         docstring field;
374         
375         if (index <= -1 || index >= int(fields.size()))
376                 //either "All Fields" or "Keys" or an invalid value
377                 field = from_ascii("");
378         else
379                 field = fields[index];
380         
381         //Was it "Keys"?
382         bool const onlyKeys = index == -1;
383         
384         //"All Entry Types" is first.
385         index = entriesCO->currentIndex() - 1; 
386         vector<docstring> const & entries = bi.getEntries();
387         docstring entry_type;
388         if (index < 0 || index >= int(entries.size()))
389                 entry_type = from_ascii("");
390         else 
391                 entry_type = entries[index];
392         
393         bool const case_sentitive = caseCB->checkState();
394         bool const reg_exp = regexCB->checkState();
395         findKey(bi, text, onlyKeys, field, entry_type, 
396                        case_sentitive, reg_exp, reset);
397         //FIXME
398         //It'd be nice to save and restore the current selection in 
399         //availableLV. Currently, we get an automatic reset, since the
400         //model is reset.
401         
402         updateControls(bi);
403 }
404
405
406 void GuiCitation::on_fieldsCO_currentIndexChanged(int /*index*/)
407 {
408         findText(findLE->text(), true);
409 }
410
411
412 void GuiCitation::on_entriesCO_currentIndexChanged(int /*index*/)
413 {
414         findText(findLE->text(), true);
415 }
416
417
418 void GuiCitation::on_citationStyleCO_currentIndexChanged(int index)
419 {
420         if (index >= 0 && index < citationStyleCO->count()) {
421                 vector<CiteStyle> const & styles = citeStyles_;
422                 updateFormatting(styles[index]);
423         }
424 }
425
426
427 void GuiCitation::on_findLE_textChanged(const QString & text)
428 {
429         bool const searchAsWeGo = (asTypeCB->checkState() == Qt::Checked);
430         searchPB->setDisabled(text.isEmpty() || searchAsWeGo);
431         if (!text.isEmpty()) {
432                 if (searchAsWeGo)
433                         findText(findLE->text());
434                 return;
435         }
436         findText(findLE->text());
437         findLE->setFocus();
438 }
439
440 void GuiCitation::on_searchPB_clicked()
441 {
442         findText(findLE->text(), true);
443 }
444
445
446 void GuiCitation::on_caseCB_stateChanged(int)
447 {
448         findText(findLE->text());
449 }
450
451
452 void GuiCitation::on_regexCB_stateChanged(int)
453 {
454         findText(findLE->text());
455 }
456
457
458 void GuiCitation::on_asTypeCB_stateChanged(int)
459 {
460         bool const searchAsWeGo = (asTypeCB->checkState() == Qt::Checked);
461         searchPB->setDisabled(findLE->text().isEmpty() || searchAsWeGo);
462         if (searchAsWeGo)
463                 findText(findLE->text(), true);
464 }
465
466
467 void GuiCitation::changed()
468 {
469         setButtons();
470 }
471
472
473 void GuiCitation::apply(int const choice, bool full, bool force,
474         QString before, QString after)
475 {
476         if (cited_keys_.isEmpty())
477                 return;
478
479         vector<CiteStyle> const & styles = citeStyles_;
480         if (styles[choice] == NOCITE) {
481                 full = false;
482                 force = false;
483                 before.clear();
484                 after.clear();
485         }
486         
487         CitationStyle s;
488         s.style = styles[choice];
489         s.full = full;
490         s.forceUpperCase = force;
491         string const command = citationStyleToString(s);
492
493         params_.setCmdName(command);
494         params_["key"] = qstring_to_ucs4(cited_keys_.join(","));
495         params_["before"] = qstring_to_ucs4(before);
496         params_["after"] = qstring_to_ucs4(after);
497         dispatchParams();
498 }
499
500
501 void GuiCitation::clearSelection()
502 {
503         cited_keys_.clear();
504         selected_model_.setStringList(cited_keys_);
505 }
506
507
508 void GuiCitation::init()
509 {
510         // Make the list of all available bibliography keys
511         BiblioInfo const & bi = bibInfo();
512         all_keys_ = to_qstring_list(bi.getKeys());
513         available_model_.setStringList(all_keys_);
514
515         // Ditto for the keys cited in this inset
516         QString str = toqstr(params_["key"]);
517         if (str.isEmpty())
518                 cited_keys_.clear();
519         else
520                 cited_keys_ = str.split(",");
521         selected_model_.setStringList(cited_keys_);
522         if (selected_model_.rowCount()) {
523                 selectedLV->blockSignals(true);
524                 selectedLV->setFocus();
525                 QModelIndex idx = selected_model_.index(0, 0);
526                 selectedLV->selectionModel()->select(idx, 
527                                 QItemSelectionModel::ClearAndSelect);
528                 selectedLV->blockSignals(false);
529         } else
530                 availableLV->setFocus();
531         fillFields(bi);
532         fillEntries(bi);
533         updateControls(bi);
534 }
535
536
537 void GuiCitation::findKey(BiblioInfo const & bi,
538         QString const & str, bool only_keys,
539         docstring field, docstring entry_type,
540         bool case_sensitive, bool reg_exp, bool reset)
541 {
542         // Used for optimisation: store last searched string.
543         static QString last_searched_string;
544         // Used to disable the above optimisation.
545         static bool last_case_sensitive;
546         static bool last_reg_exp;
547         // Reset last_searched_string in case of changed option.
548         if (last_case_sensitive != case_sensitive
549                 || last_reg_exp != reg_exp) {
550                         LYXERR(Debug::GUI, "GuiCitation::findKey: optimisation disabled!");
551                 last_searched_string.clear();
552         }
553         // save option for next search.
554         last_case_sensitive = case_sensitive;
555         last_reg_exp = reg_exp;
556
557         Qt::CaseSensitivity qtcase = case_sensitive ?
558                         Qt::CaseSensitive: Qt::CaseInsensitive;
559         QStringList keys;
560         // If new string (str) contains the last searched one...
561         if (!reset &&
562                 !last_searched_string.isEmpty() &&
563                 str.size() > 1 &&
564                 str.contains(last_searched_string, qtcase))
565                 // ... then only search within already found list.
566                 keys = available_model_.stringList();
567         else
568                 // ... else search all keys.
569                 keys = all_keys_;
570         // save searched string for next search.
571         last_searched_string = str;
572
573         QStringList result;
574         
575         // First, filter by entry_type, which will be faster than 
576         // what follows, so we may get to do that on less.
577         vector<docstring> keyVector = to_docstring_vector(keys);
578         filterByEntryType(bi, keyVector, entry_type);
579         
580         if (str.isEmpty())
581                 result = to_qstring_list(keyVector);
582         else
583                 result = to_qstring_list(searchKeys(bi, keyVector, only_keys, 
584                         qstring_to_ucs4(str), field, case_sensitive, reg_exp));
585         
586         available_model_.setStringList(result);
587 }
588
589
590 QStringList GuiCitation::citationStyles(BiblioInfo const & bi, int sel)
591 {
592         docstring const key = qstring_to_ucs4(cited_keys_[sel]);
593         return to_qstring_list(bi.getCiteStrings(key, buffer()));
594 }
595
596
597 void GuiCitation::setCitedKeys() 
598 {
599         cited_keys_ = selected_model_.stringList();
600 }
601
602
603 bool GuiCitation::initialiseParams(string const & data)
604 {
605         InsetCommand::string2params("citation", data, params_);
606         CiteEngine const engine = buffer().params().citeEngine();
607         citeStyles_ = citeStyles(engine);
608         init();
609         return true;
610 }
611
612
613 void GuiCitation::clearParams()
614 {
615         params_.clear();
616 }
617
618
619 void GuiCitation::filterByEntryType(BiblioInfo const & bi,
620         vector<docstring> & keyVector, docstring entry_type) 
621 {
622         if (entry_type.empty())
623                 return;
624         
625         vector<docstring>::iterator it = keyVector.begin();
626         vector<docstring>::iterator end = keyVector.end();
627
628         vector<docstring> result;
629         for (; it != end; ++it) {
630                 docstring const key = *it;
631                 BiblioInfo::const_iterator cit = bi.find(key);
632                 if (cit == bi.end())
633                         continue;
634                 if (cit->second.entryType() == entry_type)
635                         result.push_back(key);
636         }
637         keyVector = result;
638 }
639
640
641 CiteEngine GuiCitation::citeEngine() const
642 {
643         return buffer().params().citeEngine();
644 }
645
646
647 // Escape special chars.
648 // All characters are literals except: '.|*?+(){}[]^$\'
649 // These characters are literals when preceded by a "\", which is done here
650 // @todo: This function should be moved to support, and then the test in tests
651 //        should be moved there as well.
652 static docstring escape_special_chars(docstring const & expr)
653 {
654         // Search for all chars '.|*?+(){}[^$]\'
655         // Note that '[' and '\' must be escaped.
656         // This is a limitation of boost::regex, but all other chars in BREs
657         // are assumed literal.
658         static const boost::regex reg("[].|*?+(){}^$\\[\\\\]");
659
660         // $& is a perl-like expression that expands to all
661         // of the current match
662         // The '$' must be prefixed with the escape character '\' for
663         // boost to treat it as a literal.
664         // Thus, to prefix a matched expression with '\', we use:
665         // FIXME: UNICODE
666         return from_utf8(boost::regex_replace(to_utf8(expr), reg, "\\\\$&"));
667 }
668
669
670 vector<docstring> GuiCitation::searchKeys(BiblioInfo const & bi,        
671         vector<docstring> const & keys_to_search, bool only_keys,
672         docstring const & search_expression, docstring field,
673         bool case_sensitive, bool regex)
674 {
675         vector<docstring> foundKeys;
676
677         docstring expr = trim(search_expression);
678         if (expr.empty())
679                 return foundKeys;
680
681         if (!regex)
682                 // We must escape special chars in the search_expr so that
683                 // it is treated as a simple string by boost::regex.
684                 expr = escape_special_chars(expr);
685
686         boost::regex reg_exp;
687         try {
688                 reg_exp.assign(to_utf8(expr), case_sensitive ?
689                         boost::regex_constants::normal : boost::regex_constants::icase);
690         } catch (boost::regex_error & e) {
691                 // boost::regex throws an exception if the regular expression is not
692                 // valid.
693                 LYXERR(Debug::GUI, e.what());
694                 return vector<docstring>();
695         }
696
697         vector<docstring>::const_iterator it = keys_to_search.begin();
698         vector<docstring>::const_iterator end = keys_to_search.end();
699         for (; it != end; ++it ) {
700                 BiblioInfo::const_iterator info = bi.find(*it);
701                 if (info == bi.end())
702                         continue;
703                 
704                 BibTeXInfo const & kvm = info->second;
705                 string data;
706                 if (only_keys)
707                         data = to_utf8(*it);
708                 else if (field.empty())
709                         data = to_utf8(*it) + ' ' + to_utf8(kvm.allData());
710                 else 
711                         data = to_utf8(kvm[field]);
712                 
713                 if (data.empty())
714                         continue;
715
716                 try {
717                         if (boost::regex_search(data, reg_exp))
718                                 foundKeys.push_back(*it);
719                 }
720                 catch (boost::regex_error & e) {
721                         LYXERR(Debug::GUI, e.what());
722                         return vector<docstring>();
723                 }
724         }
725         return foundKeys;
726 }
727
728
729 void GuiCitation::dispatchParams()
730 {
731         std::string const lfun = InsetCommand::params2string("citation", params_);
732         dispatch(FuncRequest(getLfun(), lfun));
733 }
734
735
736 BiblioInfo const & GuiCitation::bibInfo() const
737 {
738         buffer().checkBibInfoCache();
739         return buffer().masterBibInfo();
740 }
741
742
743 void GuiCitation::saveSession() const
744 {
745         Dialog::saveSession();
746         QSettings settings;
747         settings.setValue(
748                 sessionKey() + "/regex", regexCB->isChecked());
749         settings.setValue(
750                 sessionKey() + "/casesensitive", caseCB->isChecked());
751         settings.setValue(
752                 sessionKey() + "/autofind", asTypeCB->isChecked());
753 }
754
755
756 void GuiCitation::restoreSession()
757 {
758         Dialog::restoreSession();
759         QSettings settings;
760         regexCB->setChecked(
761                 settings.value(sessionKey() + "/regex").toBool());
762         caseCB->setChecked(
763                 settings.value(sessionKey() + "/casesensitive").toBool());
764         asTypeCB->setChecked(
765                 settings.value(sessionKey() + "/autofind").toBool());
766 }
767
768
769 Dialog * createGuiCitation(GuiView & lv) { return new GuiCitation(lv); }
770
771
772 } // namespace frontend
773 } // namespace lyx
774
775 #include "moc_GuiCitation.cpp"
776