src/event-log.cpp

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