src/wx/screens_panel.cc

   1 /*
   2     Copyright (C) 2015-2022 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 #include "cinema_dialog.h"
  23 #include "dcpomatic_button.h"
  24 #include "screen_dialog.h"
  25 #include "screens_panel.h"
  26 #include "wx_util.h"
  27 #include "lib/cinema.h"
  28 #include "lib/config.h"
  29 #include "lib/scope_guard.h"
  30 #include "lib/screen.h"
  31 #include "lib/timer.h"
  32 #include <unicode/putil.h>
  33 #include <unicode/ucol.h>
  34 #include <unicode/uiter.h>
  35 #include <unicode/utypes.h>
  36 #include <unicode/ustring.h>
  37
  38
  39 using std::cout;
  40 using std::make_pair;
  41 using std::make_shared;
  42 using std::map;
  43 using std::pair;
  44 using std::shared_ptr;
  45 using std::string;
  46 using std::vector;
  47 using boost::optional;
  48 using namespace dcpomatic;
  49
  50
  51 ScreensPanel::ScreensPanel (wxWindow* parent)
  52         : wxPanel (parent, wxID_ANY)
  53 {
  54         auto sizer = new wxBoxSizer (wxVERTICAL);
  55
  56         _search = new wxSearchCtrl (this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(200, search_ctrl_height()));
  57 #ifndef __WXGTK3__
  58         /* The cancel button seems to be strangely broken in GTK3; clicking on it twice sometimes works */
  59         _search->ShowCancelButton (true);
  60 #endif
  61         sizer->Add (_search, 0, wxBOTTOM, DCPOMATIC_SIZER_GAP);
  62
  63         auto targets = new wxBoxSizer (wxHORIZONTAL);
  64         _targets = new wxTreeListCtrl (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTL_MULTIPLE | wxTL_3STATE | wxTL_NO_HEADER);
  65         _targets->AppendColumn (wxT("foo"));
  66
  67         targets->Add (_targets, 1, wxEXPAND | wxRIGHT, DCPOMATIC_SIZER_GAP);
  68
  69         add_cinemas ();
  70
  71         auto side_buttons = new wxBoxSizer (wxVERTICAL);
  72
  73         auto target_buttons = new wxBoxSizer (wxVERTICAL);
  74
  75         _add_cinema = new Button (this, _("Add Cinema..."));
  76         target_buttons->Add (_add_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  77         _edit_cinema = new Button (this, _("Edit Cinema..."));
  78         target_buttons->Add (_edit_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  79         _remove_cinema = new Button (this, _("Remove Cinema"));
  80         target_buttons->Add (_remove_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  81         _add_screen = new Button (this, _("Add Screen..."));
  82         target_buttons->Add (_add_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  83         _edit_screen = new Button (this, _("Edit Screen..."));
  84         target_buttons->Add (_edit_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  85         _remove_screen = new Button (this, _("Remove Screen"));
  86         target_buttons->Add (_remove_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  87
  88         side_buttons->Add (target_buttons, 0, 0);
  89
  90         auto check_buttons = new wxBoxSizer (wxVERTICAL);
  91
  92         _check_all = new Button (this, _("Check all"));
  93         check_buttons->Add (_check_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  94         _uncheck_all = new Button (this, _("Uncheck all"));
  95         check_buttons->Add (_uncheck_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  96
  97         side_buttons->Add (check_buttons, 1, wxEXPAND | wxTOP, DCPOMATIC_BUTTON_STACK_GAP * 8);
  98
  99         targets->Add (side_buttons, 0, 0);
 100
 101         sizer->Add (targets, 1, wxEXPAND);
 102
 103         _search->Bind        (wxEVT_TEXT, boost::bind (&ScreensPanel::search_changed, this));
 104         _targets->Bind       (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 105         _targets->Bind       (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 106
 107         _add_cinema->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_cinema_clicked, this));
 108         _edit_cinema->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_cinema_clicked, this));
 109         _remove_cinema->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_cinema_clicked, this));
 110
 111         _add_screen->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_screen_clicked, this));
 112         _edit_screen->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_screen_clicked, this));
 113         _remove_screen->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_screen_clicked, this));
 114
 115         _check_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::check_all, this));
 116         _uncheck_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::uncheck_all, this));
 117
 118         SetSizer (sizer);
 119
 120         UErrorCode status = U_ZERO_ERROR;
 121         _collator = ucol_open(nullptr, &status);
 122         if (_collator) {
 123                 ucol_setAttribute(_collator, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
 124                 ucol_setAttribute(_collator, UCOL_STRENGTH, UCOL_PRIMARY, &status);
 125                 ucol_setAttribute(_collator, UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, &status);
 126         }
 127 }
 128
 129
 130 ScreensPanel::~ScreensPanel ()
 131 {
 132         _targets->Unbind (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 133         _targets->Unbind (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 134
 135         if (_collator) {
 136                 ucol_close (_collator);
 137         }
 138 }
 139
 140
 141 void
 142 ScreensPanel::check_all ()
 143 {
 144         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 145                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 146                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 147                         _targets->CheckItem(screen, wxCHK_CHECKED);
 148                         set_screen_checked(screen, true);
 149                 }
 150         }
 151 }
 152
 153
 154 void
 155 ScreensPanel::uncheck_all ()
 156 {
 157         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 158                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 159                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 160                         _targets->CheckItem(screen, wxCHK_UNCHECKED);
 161                         set_screen_checked(screen, false);
 162                 }
 163         }
 164 }
 165
 166
 167 void
 168 ScreensPanel::setup_sensitivity ()
 169 {
 170         bool const sc = _selected_cinemas.size() == 1;
 171         bool const ss = _selected_screens.size() == 1;
 172
 173         _edit_cinema->Enable (sc || ss);
 174         _remove_cinema->Enable (_selected_cinemas.size() >= 1);
 175
 176         _add_screen->Enable (sc || ss);
 177         _edit_screen->Enable (ss);
 178         _remove_screen->Enable (_selected_screens.size() >= 1);
 179 }
 180
 181
 182 optional<wxTreeListItem>
 183 ScreensPanel::add_cinema (shared_ptr<Cinema> cinema, wxTreeListItem previous)
 184 {
 185         auto search = wx_to_std (_search->GetValue ());
 186         transform (search.begin(), search.end(), search.begin(), ::tolower);
 187
 188         if (!search.empty ()) {
 189                 auto name = cinema->name;
 190                 transform (name.begin(), name.end(), name.begin(), ::tolower);
 191                 if (name.find (search) == string::npos) {
 192                         return {};
 193                 }
 194         }
 195
 196         auto id = _targets->InsertItem(_targets->GetRootItem(), previous, std_to_wx(cinema->name));
 197
 198         _item_to_cinema[id] = cinema;
 199         _cinema_to_item[cinema] = id;
 200
 201         for (auto screen: cinema->screens()) {
 202                 add_screen (cinema, screen);
 203         }
 204
 205         return id;
 206 }
 207
 208
 209 optional<wxTreeListItem>
 210 ScreensPanel::add_screen (shared_ptr<Cinema> cinema, shared_ptr<Screen> screen)
 211 {
 212         auto item = cinema_to_item(cinema);
 213         if (!item) {
 214                 return {};
 215         }
 216
 217         auto id = _targets->AppendItem(*item, std_to_wx(screen->name));
 218
 219         _item_to_screen[id] = screen;
 220         _screen_to_item[screen] = id;
 221
 222         return item;
 223 }
 224
 225
 226 void
 227 ScreensPanel::add_cinema_clicked ()
 228 {
 229         auto dialog = new CinemaDialog (GetParent(), _("Add Cinema"));
 230         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 231
 232         if (dialog->ShowModal() == wxID_OK) {
 233                 auto cinema = make_shared<Cinema>(dialog->name(), dialog->emails(), dialog->notes(), dialog->utc_offset_hour(), dialog->utc_offset_minute());
 234
 235                 auto cinemas = Config::instance()->cinemas();
 236                 cinemas.sort(
 237                         [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return compare(a->name, b->name) < 0; }
 238                         );
 239
 240                 optional<wxTreeListItem> item;
 241                 for (auto existing_cinema: cinemas) {
 242                         if (!item && compare(dialog->name(), existing_cinema->name) < 0) {
 243                                 if (auto existing_item = cinema_to_item(existing_cinema)) {
 244                                         item = add_cinema (cinema, *existing_item);
 245                                 }
 246                         }
 247                 }
 248
 249                 if (!item) {
 250                         item = add_cinema (cinema, wxTLI_LAST);
 251                 }
 252
 253                 if (item) {
 254                         _targets->UnselectAll ();
 255                         _targets->Select (*item);
 256                 }
 257
 258                 Config::instance()->add_cinema (cinema);
 259         }
 260
 261         selection_changed ();
 262 }
 263
 264
 265 shared_ptr<Cinema>
 266 ScreensPanel::cinema_for_operation () const
 267 {
 268         if (_selected_cinemas.size() == 1) {
 269                 return _selected_cinemas[0];
 270         } else if (_selected_screens.size() == 1) {
 271                 return _selected_screens[0]->cinema;
 272         }
 273
 274         return {};
 275 }
 276
 277
 278 void
 279 ScreensPanel::edit_cinema_clicked ()
 280 {
 281         auto cinema = cinema_for_operation ();
 282         if (!cinema) {
 283                 return;
 284         }
 285
 286         auto dialog = new CinemaDialog(
 287                 GetParent(), _("Edit cinema"), cinema->name, cinema->emails, cinema->notes, cinema->utc_offset_hour(), cinema->utc_offset_minute()
 288                 );
 289         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 290
 291         if (dialog->ShowModal() == wxID_OK) {
 292                 cinema->name = dialog->name();
 293                 cinema->emails = dialog->emails();
 294                 cinema->notes = dialog->notes();
 295                 cinema->set_utc_offset_hour(dialog->utc_offset_hour());
 296                 cinema->set_utc_offset_minute(dialog->utc_offset_minute());
 297                 auto item = cinema_to_item(cinema);
 298                 DCPOMATIC_ASSERT(item);
 299                 _targets->SetItemText (*item, std_to_wx(dialog->name()));
 300                 Config::instance()->changed (Config::CINEMAS);
 301         }
 302 }
 303
 304
 305 void
 306 ScreensPanel::remove_cinema_clicked ()
 307 {
 308         if (_selected_cinemas.size() == 1) {
 309                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the cinema '%s'?"), std_to_wx(_selected_cinemas[0]->name)))) {
 310                         return;
 311                 }
 312         } else {
 313                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d cinemas?"), int(_selected_cinemas.size())))) {
 314                         return;
 315                 }
 316         }
 317
 318         for (auto const& cinema: _selected_cinemas) {
 319                 Config::instance()->remove_cinema(cinema);
 320                 auto item = cinema_to_item(cinema);
 321                 DCPOMATIC_ASSERT(item);
 322                 _targets->DeleteItem(*item);
 323         }
 324
 325         selection_changed ();
 326 }
 327
 328
 329 void
 330 ScreensPanel::add_screen_clicked ()
 331 {
 332         auto cinema = cinema_for_operation ();
 333         if (!cinema) {
 334                 return;
 335         }
 336
 337         auto dialog = new ScreenDialog(GetParent(), _("Add Screen"));
 338         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 339
 340         if (dialog->ShowModal () != wxID_OK) {
 341                 return;
 342         }
 343
 344         for (auto screen: cinema->screens()) {
 345                 if (screen->name == dialog->name()) {
 346                         error_dialog (
 347                                 GetParent(),
 348                                 wxString::Format (
 349                                         _("You cannot add a screen called '%s' as the cinema already has a screen with this name."),
 350                                         std_to_wx(dialog->name()).data()
 351                                         )
 352                                 );
 353                         return;
 354                 }
 355         }
 356
 357         auto screen = std::make_shared<Screen>(dialog->name(), dialog->notes(), dialog->recipient(), dialog->recipient_file(), dialog->trusted_devices());
 358         cinema->add_screen (screen);
 359         auto id = add_screen (cinema, screen);
 360         if (id) {
 361                 _targets->Expand (id.get ());
 362         }
 363
 364         Config::instance()->changed (Config::CINEMAS);
 365 }
 366
 367
 368 void
 369 ScreensPanel::edit_screen_clicked ()
 370 {
 371         if (_selected_screens.size() != 1) {
 372                 return;
 373         }
 374
 375         auto edit_screen = _selected_screens[0];
 376
 377         auto dialog = new ScreenDialog(
 378                 GetParent(), _("Edit screen"),
 379                 edit_screen->name,
 380                 edit_screen->notes,
 381                 edit_screen->recipient,
 382                 edit_screen->recipient_file,
 383                 edit_screen->trusted_devices
 384                 );
 385         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 386
 387         if (dialog->ShowModal() != wxID_OK) {
 388                 return;
 389         }
 390
 391         auto cinema = edit_screen->cinema;
 392         for (auto screen: cinema->screens()) {
 393                 if (screen != edit_screen && screen->name == dialog->name()) {
 394                         error_dialog (
 395                                 GetParent(),
 396                                 wxString::Format (
 397                                         _("You cannot change this screen's name to '%s' as the cinema already has a screen with this name."),
 398                                         std_to_wx(dialog->name()).data()
 399                                         )
 400                                 );
 401                         return;
 402                 }
 403         }
 404
 405         edit_screen->name = dialog->name();
 406         edit_screen->notes = dialog->notes();
 407         edit_screen->recipient = dialog->recipient();
 408         edit_screen->recipient_file = dialog->recipient_file();
 409         edit_screen->trusted_devices = dialog->trusted_devices();
 410         auto item = screen_to_item(edit_screen);
 411         DCPOMATIC_ASSERT (item);
 412         _targets->SetItemText (*item, std_to_wx(dialog->name()));
 413         Config::instance()->changed (Config::CINEMAS);
 414 }
 415
 416
 417 void
 418 ScreensPanel::remove_screen_clicked ()
 419 {
 420         if (_selected_screens.size() == 1) {
 421                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the screen '%s'?"), std_to_wx(_selected_screens[0]->name)))) {
 422                         return;
 423                 }
 424         } else {
 425                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d screens?"), int(_selected_screens.size())))) {
 426                         return;
 427                 }
 428         }
 429
 430         for (auto const& screen: _selected_screens) {
 431                 screen->cinema->remove_screen(screen);
 432                 auto item = screen_to_item(screen);
 433                 DCPOMATIC_ASSERT(item);
 434                 _targets->DeleteItem(*item);
 435         }
 436
 437         Config::instance()->changed (Config::CINEMAS);
 438 }
 439
 440
 441 vector<shared_ptr<Screen>>
 442 ScreensPanel::screens () const
 443 {
 444         vector<shared_ptr<Screen>> output;
 445         std::copy (_checked_screens.begin(), _checked_screens.end(), std::back_inserter(output));
 446         return output;
 447 }
 448
 449
 450 void
 451 ScreensPanel::selection_changed_shim (wxTreeListEvent &)
 452 {
 453         selection_changed ();
 454 }
 455
 456
 457 void
 458 ScreensPanel::selection_changed ()
 459 {
 460         if (_ignore_selection_change) {
 461                 return;
 462         }
 463
 464         wxTreeListItems selection;
 465         _targets->GetSelections (selection);
 466
 467         _selected_cinemas.clear ();
 468         _selected_screens.clear ();
 469
 470         for (size_t i = 0; i < selection.size(); ++i) {
 471                 if (auto cinema = item_to_cinema(selection[i])) {
 472                         _selected_cinemas.push_back(cinema);
 473                 }
 474                 if (auto screen = item_to_screen(selection[i])) {
 475                         _selected_screens.push_back(screen);
 476                 }
 477         }
 478
 479         setup_sensitivity ();
 480 }
 481
 482
 483 void
 484 ScreensPanel::add_cinemas ()
 485 {
 486         auto cinemas = Config::instance()->cinemas();
 487         cinemas.sort(
 488                 [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return compare(a->name, b->name) < 0; }
 489                 );
 490
 491         for (auto cinema: cinemas) {
 492                 add_cinema (cinema, wxTLI_LAST);
 493         }
 494 }
 495
 496
 497 void
 498 ScreensPanel::search_changed ()
 499 {
 500         _targets->DeleteAllItems ();
 501
 502         _item_to_cinema.clear ();
 503         _cinema_to_item.clear ();
 504         _item_to_screen.clear ();
 505         _screen_to_item.clear ();
 506
 507         add_cinemas ();
 508
 509         _ignore_selection_change = true;
 510
 511         for (auto const& selection: _selected_cinemas) {
 512                 if (auto item = cinema_to_item(selection)) {
 513                         _targets->Select (*item);
 514                 }
 515         }
 516
 517         for (auto const& selection: _selected_screens) {
 518                 if (auto item = screen_to_item(selection)) {
 519                         _targets->Select (*item);
 520                 }
 521         }
 522
 523         _ignore_selection_change = false;
 524
 525         _ignore_check_change = true;
 526
 527         for (auto const& checked: _checked_screens) {
 528                 if (auto item = screen_to_item(checked)) {
 529                         _targets->CheckItem(*item, wxCHK_CHECKED);
 530                         setup_cinema_checked_state(*item);
 531                 }
 532         }
 533
 534         _ignore_check_change = false;
 535 }
 536
 537
 538 void
 539 ScreensPanel::set_screen_checked (wxTreeListItem item, bool checked)
 540 {
 541         auto screen = item_to_screen(item);
 542         DCPOMATIC_ASSERT(screen);
 543         if (checked) {
 544                 _checked_screens.insert(screen);
 545         } else {
 546                 _checked_screens.erase(screen);
 547         }
 548 }
 549
 550
 551 void
 552 ScreensPanel::setup_cinema_checked_state (wxTreeListItem screen)
 553 {
 554         auto cinema = _targets->GetItemParent(screen);
 555         DCPOMATIC_ASSERT (cinema.IsOk());
 556         int checked = 0;
 557         int unchecked = 0;
 558         for (auto child = _targets->GetFirstChild(cinema); child.IsOk(); child = _targets->GetNextSibling(child)) {
 559                 if (_targets->GetCheckedState(child) == wxCHK_CHECKED) {
 560                     ++checked;
 561                 } else {
 562                     ++unchecked;
 563                 }
 564         }
 565         if (checked == 0) {
 566                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 567         } else if (unchecked == 0) {
 568                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 569         } else {
 570                 _targets->CheckItem(cinema, wxCHK_UNDETERMINED);
 571         }
 572 }
 573
 574
 575 void
 576 ScreensPanel::checkbox_changed (wxTreeListEvent& ev)
 577 {
 578         if (_ignore_check_change) {
 579                 return;
 580         }
 581
 582         if (item_to_cinema(ev.GetItem())) {
 583                 /* Cinema: check/uncheck all children */
 584                 auto const checked = _targets->GetCheckedState(ev.GetItem());
 585                 for (auto child = _targets->GetFirstChild(ev.GetItem()); child.IsOk(); child = _targets->GetNextSibling(child)) {
 586                         _targets->CheckItem(child, checked);
 587                         set_screen_checked(child, checked);
 588                 }
 589         } else {
 590                 set_screen_checked(ev.GetItem(), _targets->GetCheckedState(ev.GetItem()));
 591                 setup_cinema_checked_state(ev.GetItem());
 592         }
 593
 594         ScreensChanged ();
 595 }
 596
 597
 598 shared_ptr<Cinema>
 599 ScreensPanel::item_to_cinema (wxTreeListItem item) const
 600 {
 601         auto iter = _item_to_cinema.find (item);
 602         if (iter == _item_to_cinema.end()) {
 603                 return {};
 604         }
 605
 606         return iter->second;
 607 }
 608
 609
 610 shared_ptr<Screen>
 611 ScreensPanel::item_to_screen (wxTreeListItem item) const
 612 {
 613         auto iter = _item_to_screen.find (item);
 614         if (iter == _item_to_screen.end()) {
 615                 return {};
 616         }
 617
 618         return iter->second;
 619 }
 620
 621
 622 optional<wxTreeListItem>
 623 ScreensPanel::cinema_to_item (shared_ptr<Cinema> cinema) const
 624 {
 625         auto iter = _cinema_to_item.find (cinema);
 626         if (iter == _cinema_to_item.end()) {
 627                 return {};
 628         }
 629
 630         return iter->second;
 631 }
 632
 633
 634 optional<wxTreeListItem>
 635 ScreensPanel::screen_to_item (shared_ptr<Screen> screen) const
 636 {
 637         auto iter = _screen_to_item.find (screen);
 638         if (iter == _screen_to_item.end()) {
 639                 return {};
 640         }
 641
 642         return iter->second;
 643 }
 644
 645
 646 int
 647 ScreensPanel::compare (string const& utf8_a, string const& utf8_b)
 648 {
 649         if (_collator) {
 650                 UErrorCode error = U_ZERO_ERROR;
 651                 boost::scoped_array<uint16_t> utf16_a(new uint16_t[utf8_a.size() + 1]);
 652                 u_strFromUTF8(reinterpret_cast<UChar*>(utf16_a.get()), utf8_a.size() + 1, nullptr, utf8_a.c_str(), -1, &error);
 653                 boost::scoped_array<uint16_t> utf16_b(new uint16_t[utf8_b.size() + 1]);
 654                 u_strFromUTF8(reinterpret_cast<UChar*>(utf16_b.get()), utf8_b.size() + 1, nullptr, utf8_b.c_str(), -1, &error);
 655                 return ucol_strcoll(_collator, reinterpret_cast<UChar*>(utf16_a.get()), -1, reinterpret_cast<UChar*>(utf16_b.get()), -1);
 656         } else {
 657                 return strcoll(utf8_a.c_str(), utf8_b.c_str());
 658         }
 659 }