src/event-log.cpp

   1 /*
   2  * Author:
   3  *   Gustav Broberg <broberg@kth.se>
   4  *
   5  * Copyright (c) 2006, 2007 Authors
   6  *
   7  * Released under GNU GPL, read the file 'COPYING' for more information
   8  */
   9
  10 #include <glibmm/i18n.h>
  11
  12 #include "desktop.h"
  13 #include "event-log.h"
  14 #include "inkscape.h"
  15 #include "util/ucompose.hpp"
  16 #include "document.h"
  17 #include "xml/repr.h"
  18 #include "sp-object.h"
  19
  20 namespace Inkscape {
  21
  22 EventLog::EventLog(SPDocument* document) :
  23     UndoStackObserver(),
  24     _connected (false),
  25     _document (document),
  26     _event_list_store (Gtk::TreeStore::create(_columns)),
  27     _event_list_selection (NULL),
  28     _event_list_view (NULL),
  29     _curr_event_parent (NULL),
  30     _notifications_blocked (false),
  31     _callback_connections (NULL)
  32 {
  33     // add initial pseudo event
  34     Gtk::TreeRow curr_row = *(_event_list_store->append());
  35     _curr_event = _last_saved = _last_event = curr_row;
  36
  37     curr_row[_columns.description] = _("[Unchanged]");
  38     curr_row[_columns.type] = SP_VERB_FILE_NEW;
  39 }
  40
  41 EventLog::~EventLog() { }
  42
  43 void
  44 EventLog::notifyUndoEvent(Event* log)
  45 {
  46     if ( !_notifications_blocked ) {
  47
  48         // make sure the supplied event matches the next undoable event
  49         g_return_if_fail ( _getUndoEvent() && (*(_getUndoEvent()))[_columns.event] == log );
  50
  51         // if we're on the first child event...
  52         if ( _curr_event->parent() &&
  53              _curr_event == _curr_event->parent()->children().begin() )
  54         {
  55             // ...back up to the parent
  56             _curr_event = _curr_event->parent();
  57             _curr_event_parent = (iterator)NULL;
  58
  59         } else {
  60
  61             // if we're about to leave a branch, collapse it
  62             if ( !_curr_event->children().empty() && _connected ) {
  63                 (*_callback_connections)[CALLB_COLLAPSE].block();
  64                 _event_list_view->collapse_row(_event_list_store->get_path(_curr_event));
  65                 (*_callback_connections)[CALLB_COLLAPSE].block(false);
  66             }
  67
  68             --_curr_event;
  69
  70             // if we're entering a branch, move to the end of it
  71             if (!_curr_event->children().empty()) {
  72                 _curr_event_parent = _curr_event;
  73                 _curr_event = _curr_event->children().end();
  74                 --_curr_event;
  75             }
  76         }
  77
  78         checkForVirginity();
  79
  80         // update the view
  81         if (_connected) {
  82             (*_callback_connections)[CALLB_SELECTION_CHANGE].block();
  83             (*_callback_connections)[CALLB_EXPAND].block();
  84
  85             Gtk::TreePath curr_path = _event_list_store->get_path(_curr_event);
  86             _event_list_view->expand_to_path(curr_path);
  87             _event_list_selection->select(curr_path);
  88             _event_list_view->scroll_to_row(curr_path);
  89
  90             (*_callback_connections)[CALLB_EXPAND].block(false);
  91             (*_callback_connections)[CALLB_SELECTION_CHANGE].block(false);
  92         }
  93
  94         updateUndoVerbs();
  95     }
  96
  97 }
  98
  99 void
 100 EventLog::notifyRedoEvent(Event* log)
 101 {
 102     if ( !_notifications_blocked ) {
 103
 104         // make sure the supplied event matches the next redoable event
 105         g_return_if_fail ( _getRedoEvent() && (*(_getRedoEvent()))[_columns.event] == log );
 106
 107         // if we're on a parent event...
 108         if ( !_curr_event->children().empty() ) {
 109
 110             // ...move to its first child
 111             _curr_event_parent = _curr_event;
 112             _curr_event = _curr_event->children().begin();
 113
 114         } else {
 115
 116             ++_curr_event;
 117
 118             // if we are about to leave a branch...
 119             if ( _curr_event->parent() &&
 120                  _curr_event == _curr_event->parent()->children().end() )
 121             {
 122
 123                 // ...collapse it
 124                 if (_connected) {
 125                     (*_callback_connections)[CALLB_SELECTION_CHANGE].block();
 126                     (*_callback_connections)[CALLB_COLLAPSE].block();
 127                     _event_list_view->collapse_row(_event_list_store->get_path(_curr_event->parent()));
 128                     (*_callback_connections)[CALLB_COLLAPSE].block(false);
 129                     (*_callback_connections)[CALLB_SELECTION_CHANGE].block(false);
 130                 }
 131
 132                 // ...and move to the next event at parent level
 133                 _curr_event = _curr_event->parent();
 134                 _curr_event_parent = (iterator)NULL;
 135
 136                 ++_curr_event;
 137             }
 138         }
 139
 140         checkForVirginity();
 141
 142         // update the view
 143         if (_connected) {
 144             Gtk::TreePath curr_path = _event_list_store->get_path(_curr_event);
 145
 146             (*_callback_connections)[CALLB_SELECTION_CHANGE].block();
 147             (*_callback_connections)[CALLB_EXPAND].block();
 148
 149             _event_list_view->expand_to_path(curr_path);
 150             _event_list_selection->select(curr_path);
 151             _event_list_view->scroll_to_row(curr_path);
 152
 153             (*_callback_connections)[CALLB_EXPAND].block(false);
 154             (*_callback_connections)[CALLB_SELECTION_CHANGE].block(false);
 155         }
 156
 157         updateUndoVerbs();
 158     }
 159
 160 }
 161
 162 void
 163 EventLog::notifyUndoCommitEvent(Event* log)
 164 {
 165     _clearRedo();
 166
 167     const unsigned int event_type = log->type;
 168
 169     Gtk::TreeRow curr_row;
 170
 171     // if the new event is of the same type as the previous then create a new branch
 172     if ( event_type == (*_curr_event)[_columns.type] ) {
 173         if ( !_curr_event_parent ) {
 174             _curr_event_parent = _curr_event;
 175         }
 176         curr_row = *(_event_list_store->append(_curr_event_parent->children()));
 177         (*_curr_event_parent)[_columns.child_count] = _curr_event_parent->children().size() + 1;
 178     } else {
 179         curr_row = *(_event_list_store->append());
 180         curr_row[_columns.child_count] = 1;
 181
 182         _curr_event = _last_event = curr_row;
 183
 184         // collapse if we're leaving a branch
 185         if (_curr_event_parent && _connected) {
 186             (*_callback_connections)[CALLB_COLLAPSE].block();
 187             _event_list_view->collapse_row(_event_list_store->get_path(_curr_event_parent));
 188             (*_callback_connections)[CALLB_COLLAPSE].block(false);
 189         }
 190
 191         _curr_event_parent = (iterator)(NULL);
 192     }
 193
 194     _curr_event = _last_event = curr_row;
 195
 196     curr_row[_columns.event] = log;
 197     curr_row[_columns.type] = event_type;
 198     curr_row[_columns.description] = log->description;
 199
 200     checkForVirginity();
 201
 202     // update the view
 203     if (_connected) {
 204         Gtk::TreePath curr_path = _event_list_store->get_path(_curr_event);
 205
 206         (*_callback_connections)[CALLB_SELECTION_CHANGE].block();
 207         (*_callback_connections)[CALLB_EXPAND].block();
 208
 209         _event_list_view->expand_to_path(curr_path);
 210         _event_list_selection->select(curr_path);
 211         _event_list_view->scroll_to_row(curr_path);
 212
 213         (*_callback_connections)[CALLB_EXPAND].block(false);
 214         (*_callback_connections)[CALLB_SELECTION_CHANGE].block(false);
 215     }
 216
 217     updateUndoVerbs();
 218 }
 219
 220 void
 221 EventLog::notifyClearUndoEvent()
 222 {
 223     _clearUndo();
 224     updateUndoVerbs();
 225 }
 226
 227 void
 228 EventLog::notifyClearRedoEvent()
 229 {
 230     _clearRedo();
 231     updateUndoVerbs();
 232 }
 233
 234 void
 235 EventLog::connectWithDialog(Gtk::TreeView *event_list_view, CallbackMap *callback_connections)
 236 {
 237     _event_list_view = event_list_view;
 238     _event_list_selection = event_list_view->get_selection();
 239     _event_list_selection->set_mode(Gtk::SELECTION_SINGLE);
 240
 241     _callback_connections = callback_connections;
 242
 243     (*_callback_connections)[CALLB_SELECTION_CHANGE].block();
 244     (*_callback_connections)[CALLB_EXPAND].block();
 245
 246     _event_list_view->expand_to_path(_event_list_store->get_path(_curr_event));
 247     _event_list_selection->select(_curr_event);
 248
 249     (*_callback_connections)[CALLB_EXPAND].block(false);
 250     (*_callback_connections)[CALLB_SELECTION_CHANGE].block(false);
 251
 252     _connected = true;
 253 }
 254
 255 void
 256 EventLog::updateUndoVerbs()
 257 {
 258     if(_document) {
 259
 260         if(_getUndoEvent()) {
 261             Inkscape::Verb::get(SP_VERB_EDIT_UNDO)->sensitive(_document, true);
 262
 263             Inkscape::Verb::get(SP_VERB_EDIT_UNDO)->name(_document, String::ucompose("%1: %2",
 264                       Glib::ustring(_("_Undo")),
 265                       Glib::ustring((*_getUndoEvent())[_columns.description])));
 266         } else {
 267             Inkscape::Verb::get(SP_VERB_EDIT_UNDO)->name(_document, _("_Undo"));
 268             Inkscape::Verb::get(SP_VERB_EDIT_UNDO)->sensitive(_document, false);
 269         }
 270
 271         if(_getRedoEvent()) {
 272             Inkscape::Verb::get(SP_VERB_EDIT_REDO)->sensitive(_document, true);
 273             Inkscape::Verb::get(SP_VERB_EDIT_REDO)->name(_document, String::ucompose("%1: %2",
 274                       Glib::ustring(_("_Redo")),
 275                       Glib::ustring((*_getRedoEvent())[_columns.description])));
 276
 277         } else {
 278             Inkscape::Verb::get(SP_VERB_EDIT_REDO)->name(_document, _("_Redo"));
 279             Inkscape::Verb::get(SP_VERB_EDIT_REDO)->sensitive(_document, false);
 280         }
 281
 282     }
 283
 284 }
 285
 286
 287 EventLog::const_iterator
 288 EventLog::_getUndoEvent() const
 289 {
 290     const_iterator undo_event = (const_iterator)NULL;
 291     if( _curr_event != _event_list_store->children().begin() )
 292         undo_event = _curr_event;
 293     return undo_event;
 294 }
 295
 296 EventLog::const_iterator
 297 EventLog::_getRedoEvent() const
 298 {
 299     const_iterator redo_event = (const_iterator)NULL;
 300
 301     if ( _curr_event != _last_event ) {
 302
 303         if ( !_curr_event->children().empty() )
 304             redo_event = _curr_event->children().begin();
 305         else  {
 306             redo_event = _curr_event;
 307             ++redo_event;
 308
 309             if ( redo_event->parent() &&
 310                  redo_event == redo_event->parent()->children().end() ) {
 311
 312                 redo_event = redo_event->parent();
 313                 ++redo_event;
 314
 315             }
 316         }
 317
 318     }
 319
 320     return redo_event;
 321 }
 322
 323 void
 324 EventLog::_clearUndo()
 325 {
 326     // TODO: Implement when needed
 327 }
 328
 329 void
 330 EventLog::_clearRedo()
 331 {
 332     if ( _last_event != _curr_event ) {
 333
 334         _last_event = _curr_event;
 335
 336         if ( !_last_event->children().empty() ) {
 337             _last_event = _last_event->children().begin();
 338         } else {
 339             ++_last_event;
 340         }
 341
 342         while ( _last_event != _event_list_store->children().end() ) {
 343
 344             if (_last_event->parent()) {
 345                 while ( _last_event != _last_event->parent()->children().end() ) {
 346                     _last_event = _event_list_store->erase(_last_event);
 347                 }
 348                 _last_event = _last_event->parent();
 349
 350                 (*_last_event)[_columns.child_count] = _last_event->children().size() + 1;
 351
 352                 ++_last_event;
 353             } else {
 354                 _last_event = _event_list_store->erase(_last_event);
 355             }
 356
 357         }
 358
 359     }
 360 }
 361
 362 /* mark document as untouched if we reach a state where the document was previously saved */
 363 void
 364 EventLog::checkForVirginity() {
 365     g_return_if_fail (_document);
 366     if (_curr_event == _last_saved) {
 367         _document->setModifiedSinceSave(false);
 368     }
 369 }
 370
 371 } // namespace Inkscape
 372
 373
 374 /*
 375   Local Variables:
 376   mode:c++
 377   c-file-style:"stroustrup"
 378   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 379   indent-tabs-mode:nil
 380   fill-column:99
 381   End:
 382 */
 383 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :