src/frontends/xforms/FormForks.C

   1 /**
   2  * \file FormForks.C
   3  * Copyright 2001 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author Angus Leeming
   7  * \date 2001-10-22
   8  */
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "xformsBC.h"
  17 #include "FormForks.h"
  18 #include "ControlForks.h"
  19 #include "form_forks.h"
  20 #include "gettext.h"
  21 #include "helper_funcs.h"
  22 #include "xforms_helpers.h"
  23 #include "support/lstrings.h"
  24
  25 using std::vector;
  26 using std::find;
  27 using std::find_if;
  28
  29 typedef FormCB<ControlForks, FormDB<FD_form_forks> > base_class;
  30
  31 FormForks::FormForks(ControlForks & c)
  32         : base_class(c, _("Child processes"))
  33 {}
  34
  35
  36 void FormForks::build() {
  37         dialog_.reset(build_forks());
  38
  39         // It appears that the browsers aren't initialised properly.
  40         // This fudge fixes tings.
  41         fl_add_browser_line(dialog_->browser_children, " ");
  42         fl_add_browser_line(dialog_->browser_kill, " ");
  43         fl_clear_browser(dialog_->browser_children);
  44         fl_clear_browser(dialog_->browser_kill);
  45
  46         // Manage the ok, apply, restore and cancel/close buttons
  47         bc().setOK(dialog_->button_ok);
  48         bc().setApply(dialog_->button_apply);
  49         bc().setCancel(dialog_->button_close);
  50         bc().invalid();
  51
  52         // Set up the tooltip mechanism
  53         setTooltipHandler(dialog_->browser_children);
  54         setTooltipHandler(dialog_->browser_kill);
  55         setTooltipHandler(dialog_->button_all);
  56         setTooltipHandler(dialog_->button_add);
  57         setTooltipHandler(dialog_->button_remove);
  58 }
  59
  60
  61 void FormForks::update()
  62 {
  63         if (!form())
  64                 return;
  65
  66         string const current_pid_str =
  67                 getSelectedStringFromBrowser(dialog_->browser_kill);
  68         pid_t const current_pid = strToInt(current_pid_str);
  69
  70         vector<pid_t> pids = controller().getPIDs();
  71
  72         // No child processes.
  73         if (pids.empty()) {
  74                 if (fl_get_browser_maxline(dialog_->browser_kill) > 0)
  75                         fl_clear_browser(dialog_->browser_kill);
  76                 if (fl_get_browser_maxline(dialog_->browser_children) > 0)
  77                         fl_clear_browser(dialog_->browser_children);
  78
  79                 setEnabled(dialog_->browser_children, false);
  80                 setEnabled(dialog_->browser_kill,     false);
  81                 setEnabled(dialog_->button_all,       false);
  82                 setEnabled(dialog_->button_add,       false);
  83                 setEnabled(dialog_->button_remove,    false);
  84
  85                 return;
  86         }
  87
  88         // Remove any processes from the kill browser that aren't in the
  89         // vector of existing PIDs.
  90         for (int i = 1; i <= fl_get_browser_maxline(dialog_->browser_kill);
  91              ++i) {
  92                 string const pid_str =
  93                         getStringFromBrowser(dialog_->browser_kill, i);
  94                 pid_t const pid = strToInt(pid_str);
  95                 vector<pid_t>::const_iterator it =
  96                         find(pids.begin(), pids.end(), pid);
  97                 if (it == pids.end())
  98                         fl_delete_browser_line(dialog_->browser_kill, i);
  99         }
 100
 101         // Build the children browser from scratch.
 102         if (fl_get_browser_maxline(dialog_->browser_children) > 0)
 103                 fl_clear_browser(dialog_->browser_children);
 104         int i = 1;
 105         for (vector<pid_t>::const_iterator it = pids.begin();
 106              it != pids.end(); ++it) {
 107                 string const pid_str = tostr(*it);
 108                 string const command = controller().getCommand(*it);
 109                 string const line = pid_str + '\t' + command;
 110
 111                 fl_add_browser_line(dialog_->browser_children, line.c_str());
 112
 113                 if (*it == current_pid)
 114                         fl_select_browser_line(dialog_->browser_children, i);
 115                 ++i;
 116         }
 117
 118         setEnabled(dialog_->browser_children, true);
 119         setEnabled(dialog_->button_all,       true);
 120         setEnabled(dialog_->button_add,       true);
 121 }
 122
 123
 124 void FormForks::apply()
 125 {
 126         // Get the list of all processes to kill.
 127         vector<string> const kill_vec =
 128                 getVectorFromBrowser(dialog_->browser_kill);
 129
 130         if (kill_vec.empty())
 131                 return;
 132
 133         // Remove these items from the vector of child processes.
 134         for (int i = 1; i <= fl_get_browser_maxline(dialog_->browser_children);
 135              ++i) {
 136                 string const selection =
 137                         getStringFromBrowser(dialog_->browser_children, i);
 138                 string pid_str;
 139                 split(selection, pid_str, '\t');
 140
 141                 vector<string>::const_iterator it =
 142                         find(kill_vec.begin(), kill_vec.end(), pid_str);
 143
 144                 if (it != kill_vec.end())
 145                         fl_delete_browser_line(dialog_->browser_children, i);
 146         }
 147
 148         // Clear the kill browser and deactivate appropriately.
 149         fl_clear_browser(dialog_->browser_kill);
 150         setEnabled(dialog_->browser_kill,  false);
 151         setEnabled(dialog_->button_remove, false);
 152
 153         // Pass these pids to the controller for destruction.
 154         for (vector<string>::const_iterator it = kill_vec.begin();
 155              it != kill_vec.end(); ++it) {
 156                 pid_t const pid = strToInt(*it);
 157                 controller().kill(pid);
 158         }
 159
 160 }
 161
 162
 163 ButtonPolicy::SMInput FormForks::input(FL_OBJECT * ob, long)
 164 {
 165         ButtonPolicy::SMInput activate = ButtonPolicy::SMI_NOOP;
 166
 167         if (ob == dialog_->browser_children) {
 168                 activate = input_browser_children();
 169
 170         } else if (ob == dialog_->browser_kill) {
 171                 activate = input_browser_kill();
 172
 173         } else if (ob == dialog_->button_all) {
 174                 activate = input_button_all();
 175
 176         } else if (ob == dialog_->button_add) {
 177                 activate = input_button_add();
 178
 179         } else if (ob == dialog_->button_remove) {
 180                 activate = input_button_remove();
 181         }
 182
 183         return activate;
 184 }
 185
 186 ButtonPolicy::SMInput FormForks::input_browser_children()
 187 {
 188         // Selected an item in the browser containing a list of all child
 189         // processes.
 190
 191         // 1. Highlight this item in the browser of processes to kill
 192         //    if it is already there.
 193
 194         // 2. If it is there, enable the remove button so that it can
 195         //    be removed from this list, if so desired.
 196
 197         // 3. If it isn't there, activate the add button so that it can
 198         //    be added to this list if so desired.
 199
 200         string const selection =
 201                 getSelectedStringFromBrowser(dialog_->browser_children);
 202         string pid_str;
 203         split(selection, pid_str, '\t');
 204
 205         vector<string> const kill_vec =
 206                 getVectorFromBrowser(dialog_->browser_kill);
 207
 208         vector<string>::const_iterator it =
 209                 find(kill_vec.begin(), kill_vec.end(), pid_str);
 210
 211         fl_deselect_browser(dialog_->browser_kill);
 212         if (it != kill_vec.end()) {
 213                 int const n = int(it - kill_vec.begin());
 214                 fl_select_browser_line(dialog_->browser_kill, n+1);
 215                 fl_set_browser_topline(dialog_->browser_kill, n+1);
 216         }
 217
 218         setEnabled(dialog_->button_remove, it != kill_vec.end());
 219         setEnabled(dialog_->button_add,    it == kill_vec.end());
 220
 221         return ButtonPolicy::SMI_NOOP;
 222 }
 223
 224
 225 namespace {
 226
 227 class FindPID {
 228 public:
 229         FindPID(string const & pid) : pid_(pid) {}
 230         bool operator()(string const & line)
 231         {
 232                 if (line.empty())
 233                         return false;
 234
 235                 string pid_str;
 236                 split(line, pid_str, '\t');
 237                 return pid_str == pid_;
 238         }
 239
 240 private:
 241         string pid_;
 242 };
 243
 244 } // namespace anon
 245
 246
 247 ButtonPolicy::SMInput FormForks::input_browser_kill()
 248 {
 249         // Selected an item in the browser containing a list of processes
 250         // to kill.
 251
 252         // 1. Highlight this item in the browser of all child processes.
 253
 254         // 2. Enable the remove button so that it can removed from this list,
 255         //    if so desired.
 256
 257         // 3. Disable the add button.
 258
 259         string const pid_str =
 260                 getSelectedStringFromBrowser(dialog_->browser_kill);
 261
 262         // Find this string in the list of all child processes
 263         vector<string> const child_vec =
 264                 getVectorFromBrowser(dialog_->browser_children);
 265
 266         vector<string>::const_iterator it =
 267                 find_if(child_vec.begin(), child_vec.end(), FindPID(pid_str));
 268
 269         fl_deselect_browser(dialog_->browser_children);
 270         if (it != child_vec.end()) {
 271                 int const n = int(it - child_vec.begin());
 272                 fl_select_browser_line(dialog_->browser_children, n+1);
 273                 fl_set_browser_topline(dialog_->browser_children, n+1);
 274         }
 275
 276         setEnabled(dialog_->button_remove, true);
 277         setEnabled(dialog_->button_add,    false);
 278
 279         return ButtonPolicy::SMI_NOOP;
 280 }
 281
 282
 283 namespace {
 284
 285 vector<string> const getPIDvector(FL_OBJECT * ob)
 286 {
 287         vector<string> vec = getVectorFromBrowser(ob);
 288         if (vec.empty())
 289                 return vec;
 290
 291         for (vector<string>::iterator it = vec.begin(); it != vec.end(); ++it) {
 292                 string pid_str;
 293                 split(*it, pid_str, '\t');
 294                 *it = pid_str;
 295         }
 296
 297         return vec;
 298 }
 299
 300 } // namespace anon
 301
 302
 303 ButtonPolicy::SMInput FormForks::input_button_all()
 304 {
 305         // Pressed the "All" button.
 306
 307         // 1. Check that the browser of processes to kill doesn't already
 308         //    contain the entire list.
 309
 310         // 2. If it doesn't, copy the PIDs of all child processes into the
 311         //    browser of processes to kill.
 312
 313         // 3. Deactivate the "children" browser and the "add" and "all" buttons
 314
 315         // 4. Activate the "kill" browser and the "remove" button"
 316
 317         ButtonPolicy::SMInput activate = ButtonPolicy::SMI_NOOP;
 318
 319         vector<string> const pid_vec = getPIDvector(dialog_->browser_children);
 320
 321         // to resolve a warning about comparison between signed and unsigned.
 322         int const pid_vec_size = int(pid_vec.size());
 323
 324         if (fl_get_browser_maxline(dialog_->browser_kill) != pid_vec_size) {
 325                 activate = ButtonPolicy::SMI_VALID;
 326
 327                 fl_clear_browser(dialog_->browser_kill);
 328                 for (vector<string>::const_iterator it = pid_vec.begin();
 329                      it != pid_vec.end(); ++it) {
 330                         fl_add_browser_line(dialog_->browser_kill, it->c_str());
 331                 }
 332
 333                 if (fl_get_browser_maxline(dialog_->browser_kill) >= 1)
 334                         fl_set_browser_topline(dialog_->browser_kill, 1);
 335         }
 336
 337         setEnabled(dialog_->browser_children, false);
 338         setEnabled(dialog_->button_add,       false);
 339         setEnabled(dialog_->button_all,       false);
 340         setEnabled(dialog_->browser_kill,     true);
 341         setEnabled(dialog_->button_remove,    true);
 342
 343         return activate;
 344 }
 345
 346
 347 ButtonPolicy::SMInput FormForks::input_button_add()
 348 {
 349         // Pressed the "Add" button.
 350
 351         // 1. Copy the PID of the selected item in the browser of all child
 352         //    processes over into the browser of processes to kill.
 353
 354         // 2. Activate the "kill" browser and the "remove" button.
 355
 356         // 3. Deactivate the "add" button.
 357
 358         string const selection =
 359                 getSelectedStringFromBrowser(dialog_->browser_children);
 360         string pid_str;
 361         split(selection, pid_str, '\t');
 362
 363         vector<string> const kill_vec =
 364                 getVectorFromBrowser(dialog_->browser_kill);
 365
 366         vector<string>::const_iterator it =
 367                 find(kill_vec.begin(), kill_vec.end(), pid_str);
 368
 369         if (it == kill_vec.end()) {
 370                 fl_add_browser_line(dialog_->browser_kill, pid_str.c_str());
 371                 int const n = fl_get_browser_maxline(dialog_->browser_kill);
 372                 fl_select_browser_line(dialog_->browser_kill, n);
 373         }
 374
 375         setEnabled(dialog_->browser_kill,  true);
 376         setEnabled(dialog_->button_remove, true);
 377         setEnabled(dialog_->button_add,    false);
 378
 379         return ButtonPolicy::SMI_VALID;
 380 }
 381
 382
 383 ButtonPolicy::SMInput FormForks::input_button_remove()
 384 {
 385         // Pressed the "Remove" button.
 386
 387         // 1. Remove the selected item in the browser of processes to kill.
 388
 389         // 2. Activate the "add" button and "all" buttons.
 390
 391         // 3. Deactivate the "remove" button.
 392
 393         int const sel = fl_get_browser(dialog_->browser_kill);
 394         fl_delete_browser_line(dialog_->browser_kill, sel);
 395
 396         setEnabled(dialog_->button_add,    true);
 397         setEnabled(dialog_->button_all,    true);
 398         setEnabled(dialog_->button_remove, false);
 399
 400         return ButtonPolicy::SMI_VALID;
 401 }
 402
 403
 404 string const FormForks::getVerboseTooltip(FL_OBJECT const * ob) const
 405 {
 406         string str;
 407
 408         if (ob == dialog_->browser_children) {
 409                 str = _("All currently running child processes forked by LyX.");
 410         } else if (ob == dialog_->browser_kill) {
 411                 str = _("A list of all child processes to kill.");
 412         } else if (ob == dialog_->button_all) {
 413                 str = _("Add all processes to the list of processes to kill.");
 414         } else if (ob == dialog_->button_add) {
 415                 str = _("Add the currently selected child process to the list of processes to kill.");
 416         } else if (ob == dialog_->button_remove) {
 417                 str = _("Remove the currently selected item from the list of processes to kill.");
 418         }
 419
 420         return str;
 421 }
 422
 423