src/minibuffer.C

   1 /* ###########################################################################
   2  *
   3  *                 The MiniBuffer Class
   4  *                 read minibuffer.h for more
   5  *                 information.
   6  *
   7  *           Copyright 1995 Matthias Ettrich
   8  *           Copyright 1995-2000 The LyX Team.
   9  *
  10  * ###########################################################################
  11  */
  12
  13 #include <config.h>
  14
  15 #include <iostream>
  16
  17 #ifdef __GNUG__
  18 #pragma implementation
  19 #endif
  20
  21 #include "minibuffer.h"
  22
  23 #include "support/lyxalgo.h"
  24 #include "support/filetools.h"
  25 #include "LyXView.h"
  26 #include "gettext.h"
  27 #include "LyXAction.h"
  28 #include "BufferView.h"
  29
  30
  31 using SigC::slot;
  32 using std::vector;
  33
  34 extern LyXAction lyxaction;
  35
  36
  37 namespace {
  38
  39 struct prefix {
  40         string p;
  41         prefix(string const & s)
  42                 : p(s) {}
  43         bool operator()(string const & s) const {
  44                 return prefixIs(s, p);
  45         }
  46 };
  47
  48 } // end of anon namespace
  49
  50
  51 MiniBuffer::MiniBuffer(LyXView * o, FL_Coord x, FL_Coord y,
  52                        FL_Coord h, FL_Coord w)
  53         : stored_(false), owner_(o), state_(spaces)
  54 {
  55         add(FL_NORMAL_INPUT, x, y, h, w);
  56         timer.setTimeout(6000);
  57         timer.timeout.connect(slot(this, &MiniBuffer::init));
  58         stored_timer.setTimeout(1500);
  59         stored_timer.timeout.connect(slot(this, &MiniBuffer::stored_slot));
  60         deactivate();
  61 }
  62
  63
  64 void MiniBuffer::stored_slot()
  65 {
  66         if (stored_) {
  67                 stored_ = false;
  68                 fl_set_input(the_buffer, stored_input.c_str());
  69         }
  70 }
  71
  72
  73 void MiniBuffer::stored_set(string const & str)
  74 {
  75         stored_input = str;
  76         stored_ = true;
  77         stored_timer.start();
  78 }
  79
  80
  81 int MiniBuffer::peek_event(FL_OBJECT * ob, int event, int key)
  82 {
  83         switch (event) {
  84         case FL_KEYBOARD:
  85         {
  86                 char const * tmp = fl_get_input(ob);
  87                 string input = tmp ? tmp : "";
  88                 if (stored_) {
  89                         stored_timer.stop();
  90                         input = stored_input;
  91                         fl_set_input(ob, input.c_str());
  92                         stored_ = false;
  93                 }
  94
  95                 switch (key) {
  96                 case XK_Down:
  97                         if (hist_iter != history_->end()) {
  98                                 ++hist_iter;
  99                         }
 100                         if (hist_iter == history_->end()) {
 101                                 // no further history
 102                                 stored_set(input);
 103                                 fl_set_input(ob, _("[End of history]"));
 104                         } else {
 105                                 fl_set_input(ob, (*hist_iter).c_str());
 106                         }
 107                         return 1;
 108                 case XK_Up:
 109                         if (hist_iter == history_->begin()) {
 110                                 // no further history
 111                                 stored_set(input);
 112                                 fl_set_input(ob, _("[Beginning of history]"));
 113                         } else {
 114                                 --hist_iter;
 115                                 fl_set_input(ob, (*hist_iter).c_str());
 116                         }
 117                         return 1;
 118                 case 9:
 119                 case XK_Tab:
 120                 {
 121                         // Completion handling.
 122
 123                         vector<string> comp;
 124                         lyx::copy_if(completion_.begin(),
 125                                      completion_.end(),
 126                                      std::back_inserter(comp), prefix(input));
 127
 128                         if (comp.empty()) {
 129                                 // No matches
 130                                 string const tmp = input + _(" [no match]");
 131                                 stored_set(input);
 132                                 fl_set_input(ob, tmp.c_str());
 133                         } else if (comp.size() == 1) {
 134                                 // Perfect match
 135                                 string const tmp =
 136                                         comp[0] + _(" [sole completion]");
 137                                 stored_set(comp[0]);
 138                                 fl_set_input(ob, tmp.c_str());
 139                         } else {
 140                                 // More that one match
 141                                 // Find maximal avaliable prefix
 142                                 string const tmp = comp[0];
 143                                 string test(input);
 144                                 test += tmp[test.length()];
 145                                 while (test.length() < tmp.length()) {
 146                                         vector<string> vtmp;
 147                                         lyx::copy_if(comp.begin(),
 148                                                      comp.end(),
 149                                                      std::back_inserter(vtmp),
 150                                                      prefix(test));
 151                                         if (vtmp.size() != comp.size()) {
 152                                                 test.erase(test.length() - 1);
 153                                                 break;
 154                                         }
 155                                         test += tmp[test.length()];
 156                                 }
 157                                 fl_set_input(ob, test.c_str());
 158
 159                                 // How should the possible matches
 160                                 // be visualized?
 161                                 std::copy(comp.begin(), comp.end(),
 162                                           std::ostream_iterator<string>(std::cerr, "\n"));
 163                         }
 164                         return 1;
 165                 }
 166                 case 27:
 167                 case XK_Escape:
 168                         // Abort
 169                         owner_->view()->focus(true);
 170                         init();
 171                         deactivate();
 172                         //escape.emit();
 173                         return 1;
 174                 case 13:
 175                 case XK_Return:
 176                 {
 177                         // First check for match
 178                         vector<string>::const_iterator cit =
 179                                 std::find(completion_.begin(),
 180                                           completion_.end(),
 181                                           input);
 182                         if (cit == completion_.end()) {
 183                                 // no such func/item
 184                                 stored_set(input);
 185                                 string const tmp = input + _(" [no match]");
 186                                 fl_set_input(ob, tmp.c_str());
 187                         } else {
 188                                 // Return the inputted string
 189                                 deactivate();
 190                                 owner_->view()->focus(true);
 191                                 history_->push_back(input);
 192                                 stringReady.emit(input);
 193                         }
 194                         return 1;
 195                 }
 196                 case XK_space:
 197                 {
 198                         // Depending on the input state spaces might not
 199                         // be allowed.
 200                         switch (state_) {
 201                         case spaces:
 202                                 return 0;
 203                         case nospaces:
 204                         {
 205                                 stored_set(input);
 206                                 string const tmp = input + _(" [no match]");
 207                                 fl_set_input(ob, tmp.c_str());
 208                                 return 1;
 209                         }
 210                         }
 211
 212                 }
 213
 214                 default:
 215                         return 0;
 216                 }
 217         }
 218         default:
 219                 //lyxerr << "Unhandled minibuffer event!" << endl;
 220                 break;
 221         }
 222
 223         return 0;
 224 }
 225
 226
 227 extern "C"
 228 int C_MiniBuffer_peek_event(FL_OBJECT * ob, int event,
 229                             FL_Coord, FL_Coord,
 230                             int key, void * /*xev*/)
 231 {
 232         MiniBuffer * mini = static_cast<MiniBuffer*>(ob->u_vdata);
 233         return mini->peek_event(ob, event, key);
 234 }
 235
 236
 237 void MiniBuffer::prepare()
 238 {
 239         text.erase();
 240         fl_set_input(the_buffer, "");
 241         activate();
 242         fl_set_focus_object(owner_->getForm(), the_buffer);
 243 }
 244
 245
 246 FL_OBJECT * MiniBuffer::add(int type, FL_Coord x, FL_Coord y,
 247                            FL_Coord w, FL_Coord h)
 248 {
 249         FL_OBJECT * obj;
 250
 251         the_buffer = obj = fl_add_input(type, x, y, w, h, text.c_str());
 252         fl_set_object_boxtype(obj, FL_DOWN_BOX);
 253         fl_set_object_resize(obj, FL_RESIZE_ALL);
 254         fl_set_object_gravity(obj, SouthWestGravity, SouthEastGravity);
 255         fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 256         fl_set_object_lsize(obj, FL_NORMAL_SIZE);
 257
 258         // To intercept Up, Down, Table for history
 259         fl_set_object_prehandler(obj, C_MiniBuffer_peek_event);
 260         obj->u_vdata = this;
 261         obj->wantkey = FL_KEY_TAB;
 262
 263         fl_set_input(the_buffer, text.c_str());
 264
 265         return obj;
 266 }
 267
 268
 269 void MiniBuffer::message(string const & str)
 270 {
 271         timer.restart();
 272         string const ntext = strip(str);
 273         if (!the_buffer->focus) {
 274                 fl_set_input(the_buffer, ntext.c_str());
 275                 text = ntext;
 276         }
 277 }
 278
 279
 280 void MiniBuffer::messagePush(string const & str)
 281 {
 282         text_stored = text;
 283         message(str);
 284 }
 285
 286
 287 void MiniBuffer::messagePop()
 288 {
 289         if (!text_stored.empty()) {
 290                 message(text_stored);
 291                 text_stored.erase();
 292         }
 293 }
 294
 295
 296 void MiniBuffer::addSet(string const & s1, string const & s2)
 297 {
 298         string const str = text + ' ' +  s1 + ' ' + s2;
 299         message(str);
 300 }
 301
 302
 303 void MiniBuffer::getString(State spaces,
 304                            vector<string> const & completion,
 305                            vector<string> & history)
 306 {
 307         state_ = spaces;
 308         completion_ = completion;
 309         history_ = &history;
 310         hist_iter = history_->end();
 311         prepare();
 312 }
 313
 314
 315 void MiniBuffer::init()
 316 {
 317         // If we have focus, we don't want to change anything.
 318         if (the_buffer->focus)
 319                 return;
 320
 321         timeout.emit();
 322         timer.stop();
 323 }
 324
 325
 326 void MiniBuffer::activate()
 327 {
 328         fl_activate_object(the_buffer);
 329         fl_redraw_object(the_buffer);
 330 }
 331
 332
 333 void MiniBuffer::deactivate()
 334 {
 335         fl_redraw_object(the_buffer);
 336         fl_deactivate_object(the_buffer);
 337 }
 338
 339
 340 void MiniBuffer::redraw()
 341 {
 342         fl_redraw_object(the_buffer);
 343 }