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/screen.h"
  30 #include "lib/timer.h"
  31 #include <unicode/putil.h>
  32 #include <unicode/ucol.h>
  33 #include <unicode/uiter.h>
  34 #include <unicode/utypes.h>
  35 #include <unicode/ustring.h>
  36
  37
  38 using std::cout;
  39 using std::make_pair;
  40 using std::make_shared;
  41 using std::map;
  42 using std::pair;
  43 using std::shared_ptr;
  44 using std::string;
  45 using std::vector;
  46 using boost::optional;
  47 using namespace dcpomatic;
  48
  49
  50 ScreensPanel::ScreensPanel (wxWindow* parent)
  51         : wxPanel (parent, wxID_ANY)
  52 {
  53         auto sizer = new wxBoxSizer (wxVERTICAL);
  54
  55         _search = new wxSearchCtrl (this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(200, search_ctrl_height()));
  56 #ifndef __WXGTK3__
  57         /* The cancel button seems to be strangely broken in GTK3; clicking on it twice sometimes works */
  58         _search->ShowCancelButton (true);
  59 #endif
  60         sizer->Add (_search, 0, wxBOTTOM, DCPOMATIC_SIZER_GAP);
  61
  62         auto targets = new wxBoxSizer (wxHORIZONTAL);
  63         _targets = new wxTreeListCtrl (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTL_MULTIPLE | wxTL_3STATE | wxTL_NO_HEADER);
  64         _targets->AppendColumn (wxT("foo"));
  65
  66         targets->Add (_targets, 1, wxEXPAND | wxRIGHT, DCPOMATIC_SIZER_GAP);
  67
  68         add_cinemas ();
  69
  70         auto side_buttons = new wxBoxSizer (wxVERTICAL);
  71
  72         auto target_buttons = new wxBoxSizer (wxVERTICAL);
  73
  74         _add_cinema = new Button (this, _("Add Cinema..."));
  75         target_buttons->Add (_add_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  76         _edit_cinema = new Button (this, _("Edit Cinema..."));
  77         target_buttons->Add (_edit_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  78         _remove_cinema = new Button (this, _("Remove Cinema"));
  79         target_buttons->Add (_remove_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  80         _add_screen = new Button (this, _("Add Screen..."));
  81         target_buttons->Add (_add_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  82         _edit_screen = new Button (this, _("Edit Screen..."));
  83         target_buttons->Add (_edit_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  84         _remove_screen = new Button (this, _("Remove Screen"));
  85         target_buttons->Add (_remove_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  86
  87         side_buttons->Add (target_buttons, 0, 0);
  88
  89         auto check_buttons = new wxBoxSizer (wxVERTICAL);
  90
  91         _check_all = new Button (this, _("Check all"));
  92         check_buttons->Add (_check_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  93         _uncheck_all = new Button (this, _("Uncheck all"));
  94         check_buttons->Add (_uncheck_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  95
  96         side_buttons->Add (check_buttons, 1, wxEXPAND | wxTOP, DCPOMATIC_BUTTON_STACK_GAP * 8);
  97
  98         targets->Add (side_buttons, 0, 0);
  99
 100         sizer->Add (targets, 1, wxEXPAND);
 101
 102         _search->Bind        (wxEVT_TEXT, boost::bind (&ScreensPanel::search_changed, this));
 103         _targets->Bind       (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 104         _targets->Bind       (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 105
 106         _add_cinema->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_cinema_clicked, this));
 107         _edit_cinema->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_cinema_clicked, this));
 108         _remove_cinema->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_cinema_clicked, this));
 109
 110         _add_screen->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_screen_clicked, this));
 111         _edit_screen->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_screen_clicked, this));
 112         _remove_screen->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_screen_clicked, this));
 113
 114         _check_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::check_all, this));
 115         _uncheck_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::uncheck_all, this));
 116
 117         SetSizer (sizer);
 118
 119         UErrorCode status = U_ZERO_ERROR;
 120         _collator = ucol_open(nullptr, &status);
 121         if (_collator) {
 122                 ucol_setAttribute(_collator, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
 123                 ucol_setAttribute(_collator, UCOL_STRENGTH, UCOL_PRIMARY, &status);
 124                 ucol_setAttribute(_collator, UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, &status);
 125         }
 126 }
 127
 128
 129 ScreensPanel::~ScreensPanel ()
 130 {
 131         _targets->Unbind (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 132         _targets->Unbind (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 133
 134         if (_collator) {
 135                 ucol_close (_collator);
 136         }
 137 }
 138
 139
 140 void
 141 ScreensPanel::check_all ()
 142 {
 143         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 144                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 145                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 146                         _targets->CheckItem(screen, wxCHK_CHECKED);
 147                         set_screen_checked(screen, true);
 148                 }
 149         }
 150 }
 151
 152
 153 void
 154 ScreensPanel::uncheck_all ()
 155 {
 156         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 157                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 158                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 159                         _targets->CheckItem(screen, wxCHK_UNCHECKED);
 160                         set_screen_checked(screen, false);
 161                 }
 162         }
 163 }
 164
 165
 166 void
 167 ScreensPanel::setup_sensitivity ()
 168 {
 169         bool const sc = _selected_cinemas.size() == 1;
 170         bool const ss = _selected_screens.size() == 1;
 171
 172         _edit_cinema->Enable (sc || ss);
 173         _remove_cinema->Enable (_selected_cinemas.size() >= 1);
 174
 175         _add_screen->Enable (sc || ss);
 176         _edit_screen->Enable (ss);
 177         _remove_screen->Enable (_selected_screens.size() >= 1);
 178 }
 179
 180
 181 optional<wxTreeListItem>
 182 ScreensPanel::add_cinema (shared_ptr<Cinema> cinema, wxTreeListItem previous)
 183 {
 184         auto search = wx_to_std (_search->GetValue ());
 185         transform (search.begin(), search.end(), search.begin(), ::tolower);
 186
 187         if (!search.empty ()) {
 188                 auto name = cinema->name;
 189                 transform (name.begin(), name.end(), name.begin(), ::tolower);
 190                 if (name.find (search) == string::npos) {
 191                         return {};
 192                 }
 193         }
 194
 195         auto id = _targets->InsertItem(_targets->GetRootItem(), previous, std_to_wx(cinema->name));
 196
 197         _item_to_cinema[id] = cinema;
 198         _cinema_to_item[cinema] = id;
 199
 200         for (auto screen: cinema->screens()) {
 201                 add_screen (cinema, screen);
 202         }
 203
 204         return id;
 205 }
 206
 207
 208 optional<wxTreeListItem>
 209 ScreensPanel::add_screen (shared_ptr<Cinema> cinema, shared_ptr<Screen> screen)
 210 {
 211         auto item = cinema_to_item(cinema);
 212         if (!item) {
 213                 return {};
 214         }
 215
 216         auto id = _targets->AppendItem(*item, std_to_wx(screen->name));
 217
 218         _item_to_screen[id] = screen;
 219         _screen_to_item[screen] = id;
 220
 221         return item;
 222 }
 223
 224
 225 void
 226 ScreensPanel::add_cinema_clicked ()
 227 {
 228         auto d = new CinemaDialog (GetParent(), _("Add Cinema"));
 229         if (d->ShowModal () == wxID_OK) {
 230                 auto cinema = make_shared<Cinema>(d->name(), d->emails(), d->notes(), d->utc_offset_hour(), d->utc_offset_minute());
 231
 232                 auto cinemas = Config::instance()->cinemas();
 233                 cinemas.sort(
 234                         [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return compare(a->name, b->name) < 0; }
 235                         );
 236
 237                 optional<wxTreeListItem> item;
 238                 for (auto existing_cinema: cinemas) {
 239                         if (!item && compare(d->name(), existing_cinema->name) < 0) {
 240                                 if (auto existing_item = cinema_to_item(existing_cinema)) {
 241                                         item = add_cinema (cinema, *existing_item);
 242                                 }
 243                         }
 244                 }
 245
 246                 if (!item) {
 247                         item = add_cinema (cinema, wxTLI_LAST);
 248                 }
 249
 250                 if (item) {
 251                         _targets->UnselectAll ();
 252                         _targets->Select (*item);
 253                 }
 254
 255                 Config::instance()->add_cinema (cinema);
 256         }
 257
 258         d->Destroy ();
 259
 260         selection_changed ();
 261 }
 262
 263
 264 shared_ptr<Cinema>
 265 ScreensPanel::cinema_for_operation () const
 266 {
 267         if (_selected_cinemas.size() == 1) {
 268                 return _selected_cinemas[0];
 269         } else if (_selected_screens.size() == 1) {
 270                 return _selected_screens[0]->cinema;
 271         }
 272
 273         return {};
 274 }
 275
 276
 277 void
 278 ScreensPanel::edit_cinema_clicked ()
 279 {
 280         auto cinema = cinema_for_operation ();
 281         if (!cinema) {
 282                 return;
 283         }
 284
 285         auto d = new CinemaDialog (
 286                 GetParent(), _("Edit cinema"), cinema->name, cinema->emails, cinema->notes, cinema->utc_offset_hour(), cinema->utc_offset_minute()
 287                 );
 288
 289         if (d->ShowModal() == wxID_OK) {
 290                 cinema->name = d->name();
 291                 cinema->emails = d->emails();
 292                 cinema->notes = d->notes();
 293                 cinema->set_utc_offset_hour(d->utc_offset_hour());
 294                 cinema->set_utc_offset_minute(d->utc_offset_minute());
 295                 auto item = cinema_to_item(cinema);
 296                 DCPOMATIC_ASSERT(item);
 297                 _targets->SetItemText (*item, std_to_wx(d->name()));
 298                 Config::instance()->changed (Config::CINEMAS);
 299         }
 300
 301         d->Destroy ();
 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 d = new ScreenDialog (GetParent(), _("Add Screen"));
 338         if (d->ShowModal () != wxID_OK) {
 339                 d->Destroy ();
 340                 return;
 341         }
 342
 343         for (auto screen: cinema->screens()) {
 344                 if (screen->name == d->name()) {
 345                         error_dialog (
 346                                 GetParent(),
 347                                 wxString::Format (
 348                                         _("You cannot add a screen called '%s' as the cinema already has a screen with this name."),
 349                                         std_to_wx(d->name()).data()
 350                                         )
 351                                 );
 352                         return;
 353                 }
 354         }
 355
 356         auto screen = std::make_shared<Screen>(d->name(), d->notes(), d->recipient(), d->recipient_file(), d->trusted_devices());
 357         cinema->add_screen (screen);
 358         auto id = add_screen (cinema, screen);
 359         if (id) {
 360                 _targets->Expand (id.get ());
 361         }
 362
 363         Config::instance()->changed (Config::CINEMAS);
 364
 365         d->Destroy ();
 366 }
 367
 368
 369 void
 370 ScreensPanel::edit_screen_clicked ()
 371 {
 372         if (_selected_screens.size() != 1) {
 373                 return;
 374         }
 375
 376         auto edit_screen = _selected_screens[0];
 377
 378         auto d = new ScreenDialog (
 379                 GetParent(), _("Edit screen"),
 380                 edit_screen->name,
 381                 edit_screen->notes,
 382                 edit_screen->recipient,
 383                 edit_screen->recipient_file,
 384                 edit_screen->trusted_devices
 385                 );
 386
 387         if (d->ShowModal() != wxID_OK) {
 388                 d->Destroy ();
 389                 return;
 390         }
 391
 392         auto cinema = edit_screen->cinema;
 393         for (auto screen: cinema->screens()) {
 394                 if (screen != edit_screen && screen->name == d->name()) {
 395                         error_dialog (
 396                                 GetParent(),
 397                                 wxString::Format (
 398                                         _("You cannot change this screen's name to '%s' as the cinema already has a screen with this name."),
 399                                         std_to_wx(d->name()).data()
 400                                         )
 401                                 );
 402                         return;
 403                 }
 404         }
 405
 406         edit_screen->name = d->name();
 407         edit_screen->notes = d->notes();
 408         edit_screen->recipient = d->recipient();
 409         edit_screen->recipient_file = d->recipient_file();
 410         edit_screen->trusted_devices = d->trusted_devices();
 411         auto item = screen_to_item(edit_screen);
 412         DCPOMATIC_ASSERT (item);
 413         _targets->SetItemText (*item, std_to_wx(d->name()));
 414         Config::instance()->changed (Config::CINEMAS);
 415
 416         d->Destroy ();
 417 }
 418
 419
 420 void
 421 ScreensPanel::remove_screen_clicked ()
 422 {
 423         if (_selected_screens.size() == 1) {
 424                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the screen '%s'?"), std_to_wx(_selected_screens[0]->name)))) {
 425                         return;
 426                 }
 427         } else {
 428                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d screens?"), int(_selected_screens.size())))) {
 429                         return;
 430                 }
 431         }
 432
 433         for (auto const& screen: _selected_screens) {
 434                 screen->cinema->remove_screen(screen);
 435                 auto item = screen_to_item(screen);
 436                 DCPOMATIC_ASSERT(item);
 437                 _targets->DeleteItem(*item);
 438         }
 439
 440         Config::instance()->changed (Config::CINEMAS);
 441 }
 442
 443
 444 vector<shared_ptr<Screen>>
 445 ScreensPanel::screens () const
 446 {
 447         vector<shared_ptr<Screen>> output;
 448         std::copy (_checked_screens.begin(), _checked_screens.end(), std::back_inserter(output));
 449         return output;
 450 }
 451
 452
 453 void
 454 ScreensPanel::selection_changed_shim (wxTreeListEvent &)
 455 {
 456         selection_changed ();
 457 }
 458
 459
 460 void
 461 ScreensPanel::selection_changed ()
 462 {
 463         if (_ignore_selection_change) {
 464                 return;
 465         }
 466
 467         wxTreeListItems selection;
 468         _targets->GetSelections (selection);
 469
 470         _selected_cinemas.clear ();
 471         _selected_screens.clear ();
 472
 473         for (size_t i = 0; i < selection.size(); ++i) {
 474                 if (auto cinema = item_to_cinema(selection[i])) {
 475                         _selected_cinemas.push_back(cinema);
 476                 }
 477                 if (auto screen = item_to_screen(selection[i])) {
 478                         _selected_screens.push_back(screen);
 479                 }
 480         }
 481
 482         setup_sensitivity ();
 483 }
 484
 485
 486 void
 487 ScreensPanel::add_cinemas ()
 488 {
 489         auto cinemas = Config::instance()->cinemas();
 490         cinemas.sort(
 491                 [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return compare(a->name, b->name) < 0; }
 492                 );
 493
 494         for (auto cinema: cinemas) {
 495                 add_cinema (cinema, wxTLI_LAST);
 496         }
 497 }
 498
 499
 500 void
 501 ScreensPanel::search_changed ()
 502 {
 503         _targets->DeleteAllItems ();
 504
 505         _item_to_cinema.clear ();
 506         _cinema_to_item.clear ();
 507         _item_to_screen.clear ();
 508         _screen_to_item.clear ();
 509
 510         add_cinemas ();
 511
 512         _ignore_selection_change = true;
 513
 514         for (auto const& selection: _selected_cinemas) {
 515                 if (auto item = cinema_to_item(selection)) {
 516                         _targets->Select (*item);
 517                 }
 518         }
 519
 520         for (auto const& selection: _selected_screens) {
 521                 if (auto item = screen_to_item(selection)) {
 522                         _targets->Select (*item);
 523                 }
 524         }
 525
 526         _ignore_selection_change = false;
 527
 528         _ignore_check_change = true;
 529
 530         for (auto const& checked: _checked_screens) {
 531                 if (auto item = screen_to_item(checked)) {
 532                         _targets->CheckItem(*item, wxCHK_CHECKED);
 533                         setup_cinema_checked_state(*item);
 534                 }
 535         }
 536
 537         _ignore_check_change = false;
 538 }
 539
 540
 541 void
 542 ScreensPanel::set_screen_checked (wxTreeListItem item, bool checked)
 543 {
 544         auto screen = item_to_screen(item);
 545         DCPOMATIC_ASSERT(screen);
 546         if (checked) {
 547                 _checked_screens.insert(screen);
 548         } else {
 549                 _checked_screens.erase(screen);
 550         }
 551 }
 552
 553
 554 void
 555 ScreensPanel::setup_cinema_checked_state (wxTreeListItem screen)
 556 {
 557         auto cinema = _targets->GetItemParent(screen);
 558         DCPOMATIC_ASSERT (cinema.IsOk());
 559         int checked = 0;
 560         int unchecked = 0;
 561         for (auto child = _targets->GetFirstChild(cinema); child.IsOk(); child = _targets->GetNextSibling(child)) {
 562                 if (_targets->GetCheckedState(child) == wxCHK_CHECKED) {
 563                     ++checked;
 564                 } else {
 565                     ++unchecked;
 566                 }
 567         }
 568         if (checked == 0) {
 569                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 570         } else if (unchecked == 0) {
 571                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 572         } else {
 573                 _targets->CheckItem(cinema, wxCHK_UNDETERMINED);
 574         }
 575 }
 576
 577
 578 void
 579 ScreensPanel::checkbox_changed (wxTreeListEvent& ev)
 580 {
 581         if (_ignore_check_change) {
 582                 return;
 583         }
 584
 585         if (item_to_cinema(ev.GetItem())) {
 586                 /* Cinema: check/uncheck all children */
 587                 auto const checked = _targets->GetCheckedState(ev.GetItem());
 588                 for (auto child = _targets->GetFirstChild(ev.GetItem()); child.IsOk(); child = _targets->GetNextSibling(child)) {
 589                         _targets->CheckItem(child, checked);
 590                         set_screen_checked(child, checked);
 591                 }
 592         } else {
 593                 set_screen_checked(ev.GetItem(), _targets->GetCheckedState(ev.GetItem()));
 594                 setup_cinema_checked_state(ev.GetItem());
 595         }
 596
 597         ScreensChanged ();
 598 }
 599
 600
 601 shared_ptr<Cinema>
 602 ScreensPanel::item_to_cinema (wxTreeListItem item) const
 603 {
 604         auto iter = _item_to_cinema.find (item);
 605         if (iter == _item_to_cinema.end()) {
 606                 return {};
 607         }
 608
 609         return iter->second;
 610 }
 611
 612
 613 shared_ptr<Screen>
 614 ScreensPanel::item_to_screen (wxTreeListItem item) const
 615 {
 616         auto iter = _item_to_screen.find (item);
 617         if (iter == _item_to_screen.end()) {
 618                 return {};
 619         }
 620
 621         return iter->second;
 622 }
 623
 624
 625 optional<wxTreeListItem>
 626 ScreensPanel::cinema_to_item (shared_ptr<Cinema> cinema) const
 627 {
 628         auto iter = _cinema_to_item.find (cinema);
 629         if (iter == _cinema_to_item.end()) {
 630                 return {};
 631         }
 632
 633         return iter->second;
 634 }
 635
 636
 637 optional<wxTreeListItem>
 638 ScreensPanel::screen_to_item (shared_ptr<Screen> screen) const
 639 {
 640         auto iter = _screen_to_item.find (screen);
 641         if (iter == _screen_to_item.end()) {
 642                 return {};
 643         }
 644
 645         return iter->second;
 646 }
 647
 648
 649 int
 650 ScreensPanel::compare (string const& utf8_a, string const& utf8_b)
 651 {
 652         if (_collator) {
 653                 UErrorCode error = U_ZERO_ERROR;
 654                 boost::scoped_array<uint16_t> utf16_a(new uint16_t[utf8_a.size() + 1]);
 655                 u_strFromUTF8(reinterpret_cast<UChar*>(utf16_a.get()), utf8_a.size() + 1, nullptr, utf8_a.c_str(), -1, &error);
 656                 boost::scoped_array<uint16_t> utf16_b(new uint16_t[utf8_b.size() + 1]);
 657                 u_strFromUTF8(reinterpret_cast<UChar*>(utf16_b.get()), utf8_b.size() + 1, nullptr, utf8_b.c_str(), -1, &error);
 658                 return ucol_strcoll(_collator, reinterpret_cast<UChar*>(utf16_a.get()), -1, reinterpret_cast<UChar*>(utf16_b.get()), -1);
 659         } else {
 660                 return strcoll(utf8_a.c_str(), utf8_b.c_str());
 661         }
 662 }