src/frontends/qt4/TocWidget.cpp

   1 /**
   2  * \file TocWidget.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Abdelrazak Younes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "TocWidget.h"
  15
  16 #include "GuiApplication.h"
  17 #include "GuiView.h"
  18 #include "qt_helpers.h"
  19 #include "TocModel.h"
  20
  21 #include "Buffer.h"
  22 #include "BufferView.h"
  23 #include "CutAndPaste.h"
  24 #include "FuncRequest.h"
  25 #include "FuncStatus.h"
  26 #include "LyX.h"
  27 #include "Menus.h"
  28 #include "TocBackend.h"
  29
  30 #include "insets/InsetCommand.h"
  31 #include "insets/InsetRef.h"
  32
  33 #include "support/debug.h"
  34 #include "support/lassert.h"
  35
  36 #include <QHeaderView>
  37 #include <QMenu>
  38 #include <QTimer>
  39
  40 #include <vector>
  41
  42 using namespace std;
  43
  44 namespace lyx {
  45 namespace frontend {
  46
  47 TocWidget::TocWidget(GuiView & gui_view, QWidget * parent)
  48         : QWidget(parent), depth_(0), persistent_(false), gui_view_(gui_view)
  49 {
  50         setupUi(this);
  51
  52         moveOutTB->setIcon(QIcon(getPixmap("images/", "promote", "png")));
  53         moveInTB->setIcon(QIcon(getPixmap("images/", "demote", "png")));
  54         moveUpTB->setIcon(QIcon(getPixmap("images/", "up", "png")));
  55         moveDownTB->setIcon(QIcon(getPixmap("images/", "down", "png")));
  56         updateTB->setIcon(QIcon(getPixmap("images/", "reload", "png")));
  57
  58         // avoid flickering
  59         tocTV->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  60
  61         tocTV->showColumn(0);
  62
  63         // hide the pointless QHeader for now
  64         // in the future, new columns may appear
  65         // like labels, bookmarks, etc...
  66         // tocTV->header()->hide();
  67         tocTV->header()->setVisible(false);
  68
  69         // Only one item selected at a time.
  70         tocTV->setSelectionMode(QAbstractItemView::SingleSelection);
  71
  72         // The toc types combo won't change its model.
  73         typeCO->setModel(gui_view_.tocModels().nameModel());
  74
  75         // Make sure the buttons are disabled when first shown without a loaded
  76         // Buffer.
  77         enableControls(false);
  78
  79         // make us responsible for the context menu of the tabbar
  80         setContextMenuPolicy(Qt::CustomContextMenu);
  81         connect(this, SIGNAL(customContextMenuRequested(const QPoint &)),
  82                 this, SLOT(showContextMenu(const QPoint &)));
  83         connect(tocTV, SIGNAL(customContextMenuRequested(const QPoint &)),
  84                 this, SLOT(showContextMenu(const QPoint &)));
  85         connect(filterLE, SIGNAL(textEdited(QString)),
  86                 this, SLOT(filterContents()));
  87
  88         init(QString());
  89 }
  90
  91
  92 void TocWidget::showContextMenu(const QPoint & pos)
  93 {
  94         std::string name = "context-toc-" + fromqstr(current_type_);
  95         QMenu * menu = guiApp->menus().menu(toqstr(name), gui_view_);
  96         if (!menu)
  97                 return;
  98         menu->exec(mapToGlobal(pos));
  99 }
 100
 101
 102 Inset * TocWidget::itemInset() const
 103 {
 104         QModelIndex const & index = tocTV->currentIndex();
 105         TocItem const & item =
 106                 gui_view_.tocModels().currentItem(current_type_, index);
 107         DocIterator const & dit = item.dit();
 108
 109         Inset * inset = 0;
 110         if (current_type_ == "label"
 111                   || current_type_ == "graphics"
 112                   || current_type_ == "citation"
 113                   || current_type_ == "child")
 114                 inset = dit.nextInset();
 115
 116         else if (current_type_ == "branch"
 117                          || current_type_ == "index"
 118                          || current_type_ == "change")
 119                 inset = &dit.inset();
 120
 121         else if (current_type_ == "table"
 122                      || current_type_ == "listing"
 123                      || current_type_ == "figure") {
 124                 DocIterator tmp_dit(dit);
 125                 tmp_dit.pop_back();
 126                 inset = &tmp_dit.inset();
 127         }
 128         return inset;
 129 }
 130
 131
 132 bool TocWidget::getStatus(Cursor & cur, FuncRequest const & cmd,
 133         FuncStatus & status) const
 134 {
 135         Inset * inset = itemInset();
 136         FuncRequest tmpcmd(cmd);
 137
 138         QModelIndex const & index = tocTV->currentIndex();
 139         TocItem const & item =
 140                 gui_view_.tocModels().currentItem(current_type_, index);
 141
 142         switch (cmd.action_)
 143         {
 144         case LFUN_CHANGE_ACCEPT:
 145         case LFUN_CHANGE_REJECT:
 146         case LFUN_OUTLINE_UP:
 147         case LFUN_OUTLINE_DOWN:
 148         case LFUN_OUTLINE_IN:
 149         case LFUN_OUTLINE_OUT:
 150         case LFUN_SECTION_SELECT:
 151                 status.setEnabled(true);
 152                 return true;
 153
 154         case LFUN_LABEL_COPY_AS_REF: {
 155                 // For labels in math, we need to supply the label as a string
 156                 FuncRequest label_copy(LFUN_LABEL_COPY_AS_REF, item.asString());
 157                 if (inset)
 158                         return inset->getStatus(cur, label_copy, status);
 159         }
 160
 161         default:
 162                 if (inset)
 163                         return inset->getStatus(cur, tmpcmd, status);
 164         }
 165
 166         return false;
 167 }
 168
 169
 170 void TocWidget::doDispatch(Cursor & cur, FuncRequest const & cmd)
 171 {
 172         Inset * inset = itemInset();
 173         FuncRequest tmpcmd(cmd);
 174
 175         QModelIndex const & index = tocTV->currentIndex();
 176         TocItem const & item =
 177                 gui_view_.tocModels().currentItem(current_type_, index);
 178
 179         // Start an undo group.
 180         cur.beginUndoGroup();
 181
 182         switch (cmd.action_)
 183         {
 184         case LFUN_CHANGE_ACCEPT:
 185         case LFUN_CHANGE_REJECT:
 186         case LFUN_SECTION_SELECT:
 187                 dispatch(item.action());
 188                 cur.dispatch(tmpcmd);
 189                 break;
 190
 191         case LFUN_LABEL_COPY_AS_REF: {
 192                 // For labels in math, we need to supply the label as a string
 193                 FuncRequest label_copy(LFUN_LABEL_COPY_AS_REF, item.asString());
 194                 if (inset)
 195                         inset->dispatch(cur, label_copy);
 196                 break;
 197         }
 198
 199         case LFUN_OUTLINE_UP:
 200         case LFUN_OUTLINE_DOWN:
 201         case LFUN_OUTLINE_IN:
 202         case LFUN_OUTLINE_OUT:
 203                 outline(cmd.action_);
 204                 break;
 205
 206         default:
 207                 if (inset)
 208                         inset->dispatch(cur, tmpcmd);
 209         }
 210         cur.endUndoGroup();
 211 }
 212
 213
 214 void TocWidget::on_tocTV_activated(QModelIndex const & index)
 215 {
 216         goTo(index);
 217 }
 218
 219
 220 void TocWidget::on_tocTV_pressed(QModelIndex const & index)
 221 {
 222         Qt::MouseButtons const button = QApplication::mouseButtons();
 223         if (button & Qt::LeftButton) {
 224                 goTo(index);
 225                 gui_view_.setFocus();
 226         }
 227 }
 228
 229
 230 void TocWidget::goTo(QModelIndex const & index)
 231 {
 232         LYXERR(Debug::GUI, "goto " << index.row()
 233                 << ", " << index.column());
 234
 235         gui_view_.tocModels().goTo(current_type_, index);
 236 }
 237
 238
 239 void TocWidget::on_updateTB_clicked()
 240 {
 241         // The backend update can take some time so we disable
 242         // the controls while waiting.
 243         enableControls(false);
 244         gui_view_.tocModels().updateBackend();
 245 }
 246
 247
 248 void TocWidget::on_sortCB_stateChanged(int state)
 249 {
 250         gui_view_.tocModels().sort(current_type_, state == Qt::Checked);
 251         updateView();
 252 }
 253
 254
 255 void TocWidget::on_persistentCB_stateChanged(int state)
 256 {
 257         persistent_ = state == Qt::Checked;
 258 }
 259
 260
 261 /* FIXME (Ugras 17/11/06):
 262 I have implemented a indexDepth function to get the model indices. In my
 263 opinion, somebody should derive a new qvariant class for tocModelItem
 264 which saves the string data and depth information. That will save the
 265 depth calculation.  */
 266
 267 static int indexDepth(QModelIndex const & index, int depth = -1)
 268 {
 269         ++depth;
 270         return index.parent() == QModelIndex()
 271                 ? depth : indexDepth(index.parent(), depth);
 272 }
 273
 274
 275 void TocWidget::on_depthSL_valueChanged(int depth)
 276 {
 277         if (depth == depth_)
 278                 return;
 279         setTreeDepth(depth);
 280         gui_view_.setFocus();
 281 }
 282
 283
 284 void TocWidget::setTreeDepth(int depth)
 285 {
 286         depth_ = depth;
 287         if (!tocTV->model())
 288                 return;
 289
 290 #if QT_VERSION >= 0x040300
 291         // this should be faster than our own code below
 292         if (depth == 0)
 293                 tocTV->collapseAll();
 294         else
 295                 tocTV->expandToDepth(depth - 1);
 296 #else
 297         // expanding and then collapsing is probably better,
 298         // but my qt 4.1.2 doesn't have expandAll()..
 299         //tocTV->expandAll();
 300         QModelIndexList indices = tocTV->model()->match(
 301                 tocTV->model()->index(0, 0),
 302                 Qt::DisplayRole, "*", -1,
 303                 Qt::MatchFlags(Qt::MatchWildcard|Qt::MatchRecursive));
 304
 305         int size = indices.size();
 306         for (int i = 0; i < size; i++) {
 307                 QModelIndex index = indices[i];
 308                 tocTV->setExpanded(index, indexDepth(index) < depth_);
 309         }
 310 #endif
 311 }
 312
 313
 314 void TocWidget::on_typeCO_currentIndexChanged(int index)
 315 {
 316         current_type_ = typeCO->itemData(index).toString();
 317         updateView();
 318         if (typeCO->hasFocus())
 319                 gui_view_.setFocus();
 320 }
 321
 322
 323 void TocWidget::outline(FuncCode func_code)
 324 {
 325         QModelIndexList const & list = tocTV->selectionModel()->selectedIndexes();
 326         if (list.isEmpty())
 327                 return;
 328         enableControls(false);
 329         goTo(list[0]);
 330         dispatch(FuncRequest(func_code));
 331         enableControls(true);
 332         gui_view_.setFocus();
 333 }
 334
 335
 336 void TocWidget::on_moveUpTB_clicked()
 337 {
 338         outline(LFUN_OUTLINE_UP);
 339 }
 340
 341
 342 void TocWidget::on_moveDownTB_clicked()
 343 {
 344         outline(LFUN_OUTLINE_DOWN);
 345 }
 346
 347
 348 void TocWidget::on_moveInTB_clicked()
 349 {
 350         outline(LFUN_OUTLINE_IN);
 351 }
 352
 353
 354 void TocWidget::on_moveOutTB_clicked()
 355 {
 356         outline(LFUN_OUTLINE_OUT);
 357 }
 358
 359
 360 void TocWidget::select(QModelIndex const & index)
 361 {
 362         if (!index.isValid()) {
 363                 LYXERR(Debug::GUI, "TocWidget::select(): QModelIndex is invalid!");
 364                 return;
 365         }
 366
 367         tocTV->scrollTo(index);
 368         tocTV->clearSelection();
 369         tocTV->setCurrentIndex(index);
 370 }
 371
 372
 373 void TocWidget::enableControls(bool enable)
 374 {
 375         updateTB->setEnabled(enable);
 376
 377         if (!canOutline())
 378                 enable = false;
 379
 380         moveUpTB->setEnabled(enable);
 381         moveDownTB->setEnabled(enable);
 382         moveInTB->setEnabled(enable);
 383         moveOutTB->setEnabled(enable);
 384 }
 385
 386
 387 void TocWidget::updateView()
 388 {
 389         if (!gui_view_.documentBufferView()) {
 390                 enableControls(false);
 391                 typeCO->setEnabled(false);
 392                 tocTV->setModel(0);
 393                 tocTV->setEnabled(false);
 394                 depthSL->setMaximum(0);
 395                 depthSL->setValue(0);
 396                 persistentCB->setEnabled(false);
 397                 sortCB->setEnabled(false);
 398                 depthSL->setEnabled(false);
 399                 return;
 400         }
 401         bool const is_sortable = isSortable();
 402         sortCB->setEnabled(is_sortable);
 403         depthSL->setEnabled(true);
 404         typeCO->setEnabled(true);
 405         tocTV->setEnabled(false);
 406         tocTV->setUpdatesEnabled(false);
 407
 408         QAbstractItemModel * toc_model =
 409                         gui_view_.tocModels().model(current_type_);
 410         if (tocTV->model() != toc_model) {
 411                 tocTV->setModel(toc_model);
 412                 tocTV->setEditTriggers(QAbstractItemView::NoEditTriggers);
 413                 if (persistent_)
 414                         setTreeDepth(depth_);
 415         }
 416
 417         sortCB->blockSignals(true);
 418         sortCB->setChecked(is_sortable
 419                 && gui_view_.tocModels().isSorted(current_type_));
 420         sortCB->blockSignals(false);
 421
 422         bool const can_navigate_ = canNavigate();
 423         persistentCB->setEnabled(can_navigate_);
 424
 425         bool controls_enabled = toc_model && toc_model->rowCount() > 0
 426                 && !gui_view_.documentBufferView()->buffer().isReadonly();
 427         enableControls(controls_enabled);
 428
 429         depthSL->setMaximum(gui_view_.tocModels().depth(current_type_));
 430         depthSL->setValue(depth_);
 431         if (!persistent_ && can_navigate_)
 432                 setTreeDepth(depth_);
 433         if (can_navigate_) {
 434                 persistentCB->setChecked(persistent_);
 435                 select(gui_view_.tocModels().currentIndex(current_type_));
 436         }
 437         filterContents();
 438         tocTV->setEnabled(true);
 439         tocTV->setUpdatesEnabled(true);
 440 }
 441
 442
 443 void TocWidget::filterContents()
 444 {
 445         if (!tocTV->model())
 446                 return;
 447
 448         QModelIndexList indices = tocTV->model()->match(
 449                 tocTV->model()->index(0, 0),
 450                 Qt::DisplayRole, "*", -1,
 451                 Qt::MatchFlags(Qt::MatchWildcard|Qt::MatchRecursive));
 452
 453         int size = indices.size();
 454         for (int i = 0; i < size; i++) {
 455                 QModelIndex index = indices[i];
 456                 bool const matches =
 457                         index.data().toString().contains(
 458                                 filterLE->text(), Qt::CaseSensitive);
 459                 tocTV->setRowHidden(index.row(), index.parent(), !matches);
 460         }
 461         // recursively unhide parents of unhidden children
 462         for (int i = size - 1; i >= 0; i--) {
 463                 QModelIndex index = indices[i];
 464                 if (!tocTV->isRowHidden(index.row(), index.parent())
 465                     && index.parent() != QModelIndex())
 466                         tocTV->setRowHidden(index.parent().row(),
 467                                             index.parent().parent(), false);
 468         }
 469 }
 470
 471
 472 static QString decodeType(QString const & str)
 473 {
 474         QString type = str;
 475         if (type.contains("tableofcontents")) {
 476                 type = "tableofcontents";
 477         } else if (type.contains("floatlist")) {
 478                 if (type.contains("\"figure"))
 479                         type = "figure";
 480                 else if (type.contains("\"table"))
 481                         type = "table";
 482                 else if (type.contains("\"algorithm"))
 483                         type = "algorithm";
 484         }
 485         return type;
 486 }
 487
 488
 489 void TocWidget::init(QString const & str)
 490 {
 491         int new_index;
 492         if (str.isEmpty())
 493                 new_index = typeCO->findData(current_type_);
 494         else
 495                 new_index = typeCO->findData(decodeType(str));
 496
 497         // If everything else fails, settle on the table of contents which is
 498         // guaranted to exist.
 499         if (new_index == -1) {
 500                 current_type_ = "tableofcontents";
 501                 new_index = typeCO->findData(current_type_);
 502         } else {
 503                 current_type_ = typeCO->itemData(new_index).toString();
 504         }
 505
 506         typeCO->blockSignals(true);
 507         typeCO->setCurrentIndex(new_index);
 508         typeCO->blockSignals(false);
 509 }
 510
 511 } // namespace frontend
 512 } // namespace lyx
 513
 514 #include "moc_TocWidget.cpp"