src/app.cpp

   1 /*
   2  * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "app.hpp"
  18 #include "json_helper.hpp"
  19 #include "layers.hpp"
  20 #include "layout.hpp"
  21 #include "util.hpp"
  22 #include "wayland.hpp"
  23
  24 #include <cstdio>
  25 #include <memory>
  26
  27 #include <cassert>
  28
  29 #include <json-c/json.h>
  30
  31 #include <algorithm>
  32 #include <bits/signum.h>
  33 #include <csignal>
  34 #include <fstream>
  35 #include <json.hpp>
  36 #include <regex>
  37 #include <thread>
  38
  39
  40 namespace wm {
  41
  42 namespace {
  43
  44 using nlohmann::json;
  45
  46 result<json> file_to_json(char const *filename) {
  47    json j;
  48    std::ifstream i(filename);
  49    if (i.fail()) {
  50       HMI_DEBUG("wm", "Could not open config file, so use default layer information");
  51       j = default_layers_json;
  52    }
  53    else {
  54       i >> j;
  55    }
  56
  57    return Ok(j);
  58 }
  59
  60 struct result<layer_map> load_layer_map(char const *filename) {
  61    HMI_DEBUG("wm", "loading IDs from %s", filename);
  62
  63    auto j = file_to_json(filename);
  64    if (j.is_err()) {
  65       return Err<layer_map>(j.unwrap_err());
  66    }
  67    json jids = j.unwrap();
  68
  69    return to_layer_map(jids);
  70 }
  71
  72 }  // namespace
  73
  74
  75 /**
  76  * App Impl
  77  */
  78 App::App(wl::display *d)
  79    : chooks{this},
  80      display{d},
  81      controller{},
  82      outputs(),
  83      config(),
  84      layers(),
  85      id_alloc{},
  86      pending_events(false),
  87      policy{} {
  88    try {
  89       {
  90          auto l = load_layer_map(
  91             this->config.get_string("layers.json").value().c_str());
  92          if (l.is_ok()) {
  93             this->layers = l.unwrap();
  94          } else {
  95             HMI_ERROR("wm", "%s", l.err().value());
  96          }
  97       }
  98    } catch (std::exception &e) {
  99       HMI_ERROR("wm", "Loading of configuration failed: %s", e.what());
 100    }
 101 }
 102
 103 int App::init() {
 104    if (!this->display->ok()) {
 105       return -1;
 106    }
 107
 108    if (this->layers.mapping.empty()) {
 109       HMI_ERROR("wm", "No surface -> layer mapping loaded");
 110       return -1;
 111    }
 112
 113    // Make afb event
 114    for (int i=Event_Val_Min; i<=Event_Val_Max; i++) {
 115       map_afb_event[kListEventName[i]] = afb_daemon_make_event(kListEventName[i]);
 116    }
 117
 118    this->display->add_global_handler(
 119       "wl_output", [this](wl_registry *r, uint32_t name, uint32_t v) {
 120          this->outputs.emplace_back(std::make_unique<wl::output>(r, name, v));
 121       });
 122
 123    this->display->add_global_handler(
 124       "ivi_controller", [this](wl_registry *r, uint32_t name, uint32_t v) {
 125          this->controller =
 126             std::make_unique<struct compositor::controller>(r, name, v);
 127
 128          // Init controller hooks
 129          this->controller->chooks = &this->chooks;
 130
 131          // This protocol needs the output, so lets just add our mapping here...
 132          this->controller->add_proxy_to_id_mapping(
 133             this->outputs.back()->proxy.get(),
 134             wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
 135                this->outputs.back()->proxy.get())));
 136       });
 137
 138    // First level objects
 139    this->display->roundtrip();
 140    // Second level objects
 141    this->display->roundtrip();
 142    // Third level objects
 143    this->display->roundtrip();
 144
 145    return init_layers();
 146 }
 147
 148 int App::dispatch_events() {
 149    if (this->dispatch_events() == 0) {
 150       return 0;
 151    }
 152
 153    int ret = this->display->dispatch();
 154    if (ret == -1) {
 155       HMI_ERROR("wm", "wl_display_dipatch() returned error %d",
 156                this->display->get_error());
 157       return -1;
 158    }
 159    this->display->flush();
 160
 161    return 0;
 162 }
 163
 164 int App::dispatch_pending_events() {
 165    if (this->pop_pending_events()) {
 166       this->display->dispatch_pending();
 167       return 0;
 168    }
 169    return -1;
 170 }
 171
 172 bool App::pop_pending_events() {
 173    bool x{true};
 174    return this->pending_events.compare_exchange_strong(
 175       x, false, std::memory_order_consume);
 176 }
 177
 178 void App::set_pending_events() {
 179    this->pending_events.store(true, std::memory_order_release);
 180 }
 181
 182 optional<int> App::lookup_id(char const *name) {
 183    return this->id_alloc.lookup(std::string(name));
 184 }
 185 optional<std::string> App::lookup_name(int id) {
 186    return this->id_alloc.lookup(id);
 187 }
 188
 189 /**
 190  * init_layers()
 191  */
 192 int App::init_layers() {
 193    if (!this->controller) {
 194       HMI_ERROR("wm", "ivi_controller global not available");
 195       return -1;
 196    }
 197
 198    if (this->outputs.empty()) {
 199       HMI_ERROR("wm", "no output was set up!");
 200       return -1;
 201    }
 202
 203    auto &c = this->controller;
 204
 205    auto &o = this->outputs.front();
 206    auto &s = c->screens.begin()->second;
 207    auto &layers = c->layers;
 208
 209    // Write output dimensions to ivi controller...
 210    c->output_size = compositor::size{uint32_t(o->width), uint32_t(o->height)};
 211
 212    // Clear scene
 213    layers.clear();
 214
 215    // Clear screen
 216    s->clear();
 217
 218    // Quick and dirty setup of layers
 219    for (auto const &i : this->layers.mapping) {
 220       c->layer_create(i.second.layer_id, o->width, o->height);
 221       auto &l = layers[i.second.layer_id];
 222       l->set_destination_rectangle(0, 0, o->width, o->height);
 223       l->set_visibility(1);
 224       HMI_DEBUG("wm", "Setting up layer %s (%d) for surface role match \"%s\"",
 225                i.second.name.c_str(), i.second.layer_id, i.second.role.c_str());
 226    }
 227
 228    // Add layers to screen
 229    s->set_render_order(this->layers.layers);
 230
 231    this->layout_commit();
 232
 233    return 0;
 234 }
 235
 236 void App::surface_set_layout(int surface_id, optional<int> sub_surface_id) {
 237    if (!this->controller->surface_exists(surface_id)) {
 238       HMI_ERROR("wm", "Surface %d does not exist", surface_id);
 239       return;
 240    }
 241
 242    auto o_layer_id = this->layers.get_layer_id(surface_id);
 243
 244    if (!o_layer_id) {
 245       HMI_ERROR("wm", "Surface %d is not associated with any layer!", surface_id);
 246       return;
 247    }
 248
 249    uint32_t layer_id = *o_layer_id;
 250
 251    auto const &layer = this->layers.get_layer(layer_id);
 252    auto rect = layer.value().rect;
 253    auto &s = this->controller->surfaces[surface_id];
 254
 255    int x = rect.x;
 256    int y = rect.y;
 257    int w = rect.w;
 258    int h = rect.h;
 259
 260    // less-than-0 values refer to MAX + 1 - $VALUE
 261    // e.g. MAX is either screen width or height
 262    if (w < 0) {
 263       w = this->controller->output_size.w + 1 + w;
 264    }
 265    if (h < 0) {
 266       h = this->controller->output_size.h + 1 + h;
 267    }
 268
 269    if (sub_surface_id) {
 270       if (o_layer_id != this->layers.get_layer_id(*sub_surface_id)) {
 271          HMI_ERROR("wm",
 272             "surface_set_layout: layers of surfaces (%d and %d) don't match!",
 273             surface_id, *sub_surface_id);
 274          return;
 275       }
 276
 277       int x_off = 0;
 278       int y_off = 0;
 279
 280       // split along major axis
 281       if (w > h) {
 282          w /= 2;
 283          x_off = w;
 284       } else {
 285          h /= 2;
 286          y_off = h;
 287       }
 288
 289       auto &ss = this->controller->surfaces[*sub_surface_id];
 290
 291       HMI_DEBUG("wm", "surface_set_layout for sub surface %u on layer %u",
 292                *sub_surface_id, layer_id);
 293
 294       // configure surface to wxh dimensions
 295       ss->set_configuration(w, h);
 296       // set source reactangle, even if we should not need to set it.
 297       ss->set_source_rectangle(0, 0, w, h);
 298       // set destination to the display rectangle
 299       ss->set_destination_rectangle(x + x_off, y + y_off, w, h);
 300
 301    }
 302
 303    HMI_DEBUG("wm", "surface_set_layout for surface %u on layer %u", surface_id,
 304             layer_id);
 305
 306    // configure surface to wxh dimensions
 307    s->set_configuration(w, h);
 308    // set source reactangle, even if we should not need to set it.
 309    s->set_source_rectangle(0, 0, w, h);
 310
 311    // set destination to the display rectangle
 312    s->set_destination_rectangle(x, y, w, h);
 313
 314    HMI_DEBUG("wm", "Surface %u now on layer %u with rect { %d, %d, %d, %d }",
 315             surface_id, layer_id, x, y, w, h);
 316 }
 317
 318 void App::layout_commit() {
 319    this->controller->commit_changes();
 320    this->display->flush();
 321 }
 322
 323 char const *App::api_activate_surface(char const *drawing_name, char const *drawing_area) {
 324    ST();
 325
 326    auto const &surface_id = this->lookup_id(drawing_name);
 327
 328    if (!surface_id) {
 329       return "Surface does not exist";
 330    }
 331
 332    if (!this->controller->surface_exists(*surface_id)) {
 333       return "Surface does not exist in controller!";
 334    }
 335
 336    auto layer_id = this->layers.get_layer_id(*surface_id);
 337
 338    if (!layer_id) {
 339       return "Surface is not on any layer!";
 340    }
 341
 342    auto o_state = *this->layers.get_layout_state(*surface_id);
 343
 344    if (o_state == nullptr) {
 345       return "Could not find layer for surface";
 346    }
 347
 348    struct LayoutState &state = *o_state;
 349
 350    // disable layers that are above our current layer
 351    for (auto const &l : this->layers.mapping) {
 352       if (l.second.layer_id <= *layer_id) {
 353          continue;
 354       }
 355
 356       bool flush = false;
 357       if (l.second.state.main != -1) {
 358          this->deactivate(l.second.state.main);
 359          l.second.state.main = -1;
 360          flush = true;
 361       }
 362
 363       if (l.second.state.sub != -1) {
 364          this->deactivate(l.second.state.sub);
 365          l.second.state.sub = -1;
 366          flush = true;
 367       }
 368
 369       if (flush) {
 370          this->layout_commit();
 371       }
 372    }
 373
 374    auto layer = this->layers.get_layer(*layer_id);
 375
 376    if (state.main == -1) {
 377       this->try_layout(
 378          state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 379             HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 380             this->surface_set_layout(*surface_id);
 381             state = nl;
 382
 383             // Commit for configuraton
 384             this->layout_commit();
 385
 386             if (!(layer->is_normal_layout_only)) {
 387                // Wait for configuration listener
 388                controller->is_configured = false;
 389                while (!(controller->is_configured)) {
 390                   dispatch_pending_events();
 391                }
 392             }
 393
 394             std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 395             this->emit_syncdraw(drawing_name, str_area.c_str());
 396             this->enqueue_flushdraw(state.main);
 397          });
 398    } else {
 399       if (0 == strcmp(drawing_name, "HomeScreen")) {
 400          this->try_layout(
 401             state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 402                HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 403                std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 404                this->emit_syncdraw(drawing_name, str_area.c_str());
 405                this->enqueue_flushdraw(state.main);
 406             });
 407       } else {
 408          bool can_split = this->can_split(state, *surface_id);
 409
 410          if (can_split) {
 411             this->try_layout(
 412                state,
 413                LayoutState{state.main, *surface_id},
 414                [&] (LayoutState const &nl) {
 415                   HMI_DEBUG("wm", "Layout: %s", kNameLayoutSplit);
 416                   std::string main =
 417                      std::move(*this->lookup_name(state.main));
 418
 419                   this->surface_set_layout(state.main, surface_id);
 420                   if (state.sub != *surface_id) {
 421                       if (state.sub != -1) {
 422                          this->deactivate(state.sub);
 423                       }
 424                   }
 425                   state = nl;
 426
 427                   // Commit for configuraton and visibility(0)
 428                   this->layout_commit();
 429
 430                   // Wait for configuration listener
 431                   controller->is_configured = false;
 432                   while (!(controller->is_configured)) {
 433                      dispatch_pending_events();
 434                   }
 435
 436                   std::string str_area_main = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaMain);
 437                   std::string str_area_sub = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaSub);
 438                   this->emit_syncdraw(main.c_str(), str_area_main.c_str());
 439                   this->emit_syncdraw(drawing_name, str_area_sub.c_str());
 440                   this->enqueue_flushdraw(state.main);
 441                   this->enqueue_flushdraw(state.sub);
 442                });
 443          } else {
 444             this->try_layout(
 445                state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 446                   HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 447
 448                   this->surface_set_layout(*surface_id);
 449                   if (state.main != *surface_id) {
 450                       this->deactivate(state.main);
 451                   }
 452                   if (state.sub != -1) {
 453                       if (state.sub != *surface_id) {
 454                          this->deactivate(state.sub);
 455                       }
 456                   }
 457                   state = nl;
 458
 459                   // Commit for configuraton and visibility(0)
 460                   this->layout_commit();
 461
 462                   if (!(layer->is_normal_layout_only)) {
 463                      // Wait for configuration listener
 464                      controller->is_configured = false;
 465                      while (!(controller->is_configured)) {
 466                         dispatch_pending_events();
 467                      }
 468                   }
 469
 470                   std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 471                   this->emit_syncdraw(drawing_name, str_area.c_str());
 472                   this->enqueue_flushdraw(state.main);
 473                });
 474          }
 475       }
 476    }
 477
 478    // no error
 479    return nullptr;
 480 }
 481
 482 char const *App::api_deactivate_surface(char const *drawing_name) {
 483    ST();
 484    auto const &surface_id = this->lookup_id(drawing_name);
 485
 486    if (!surface_id) {
 487          return "Surface does not exist";
 488       }
 489
 490    if (*surface_id == this->layers.main_surface) {
 491       return "Cannot deactivate main_surface";
 492    }
 493
 494    auto o_state = *this->layers.get_layout_state(*surface_id);
 495
 496    if (o_state == nullptr) {
 497       return "Could not find layer for surface";
 498    }
 499
 500    struct LayoutState &state = *o_state;
 501
 502    if (state.main == -1) {
 503       return "No surface active";
 504    }
 505
 506    // Check against main_surface, main_surface_name is the configuration item.
 507    if (*surface_id == this->layers.main_surface) {
 508       HMI_DEBUG("wm", "Refusing to deactivate main_surface %d", *surface_id);
 509       return nullptr;
 510    }
 511
 512    if (state.main == *surface_id) {
 513       if (state.sub != -1) {
 514          this->try_layout(
 515             state, LayoutState{state.sub, -1}, [&] (LayoutState const &nl) {
 516                std::string sub = std::move(*this->lookup_name(state.sub));
 517
 518                this->deactivate(*surface_id);
 519                this->surface_set_layout(state.sub);
 520                state = nl;
 521
 522                this->layout_commit();
 523                std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 524                this->emit_syncdraw(sub.c_str(), str_area.c_str());
 525                this->enqueue_flushdraw(state.sub);
 526             });
 527       } else {
 528          this->try_layout(state, LayoutState{-1, -1}, [&] (LayoutState const &nl) {
 529             this->deactivate(*surface_id);
 530             state = nl;
 531             this->layout_commit();
 532          });
 533       }
 534    } else if (state.sub == *surface_id) {
 535       this->try_layout(
 536          state, LayoutState{state.main, -1}, [&] (LayoutState const &nl) {
 537             std::string main = std::move(*this->lookup_name(state.main));
 538
 539             this->deactivate(*surface_id);
 540             this->surface_set_layout(state.main);
 541             state = nl;
 542
 543             this->layout_commit();
 544             std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 545             this->emit_syncdraw(main.c_str(), str_area.c_str());
 546             this->enqueue_flushdraw(state.main);
 547          });
 548    } else {
 549       return "Surface is not active";
 550    }
 551
 552    return nullptr;
 553 }
 554
 555 void App::enqueue_flushdraw(int surface_id) {
 556    this->check_flushdraw(surface_id);
 557    HMI_DEBUG("wm", "Enqueuing EndDraw for surface_id %d", surface_id);
 558    this->pending_end_draw.push_back(surface_id);
 559 }
 560
 561 void App::check_flushdraw(int surface_id) {
 562    auto i = std::find(std::begin(this->pending_end_draw),
 563                       std::end(this->pending_end_draw), surface_id);
 564    if (i != std::end(this->pending_end_draw)) {
 565       auto n = this->lookup_name(surface_id);
 566       HMI_ERROR("wm", "Application %s (%d) has pending EndDraw call(s)!",
 567                n ? n->c_str() : "unknown-name", surface_id);
 568       std::swap(this->pending_end_draw[std::distance(
 569                    std::begin(this->pending_end_draw), i)],
 570                 this->pending_end_draw.back());
 571       this->pending_end_draw.resize(this->pending_end_draw.size() - 1);
 572    }
 573 }
 574
 575 char const *App::api_enddraw(char const *drawing_name) {
 576    for (unsigned i = 0, iend = this->pending_end_draw.size(); i < iend; i++) {
 577       auto n = this->lookup_name(this->pending_end_draw[i]);
 578       if (n && *n == drawing_name) {
 579          std::swap(this->pending_end_draw[i], this->pending_end_draw[iend - 1]);
 580          this->pending_end_draw.resize(iend - 1);
 581          this->activate(this->pending_end_draw[i]);
 582          this->layout_commit();
 583          this->emit_flushdraw(drawing_name);
 584          return nullptr;
 585       }
 586    }
 587    return "No EndDraw pending for surface";
 588 }
 589
 590 void App::api_ping() { this->dispatch_pending_events(); }
 591
 592 void App::send_event(char const *evname, char const *label){
 593    HMI_DEBUG("wm", "%s: %s(%s)", __func__, evname, label);
 594
 595    json_object *j = json_object_new_object();
 596    json_object_object_add(j, kKeyDrawingName, json_object_new_string(label));
 597
 598    int ret = afb_event_push(this->map_afb_event[evname], j);
 599    if (ret != 0) {
 600       HMI_DEBUG("wm", "afb_event_push failed: %m");
 601    }
 602 }
 603
 604 void App::send_event(char const *evname, char const *label, char const *area){
 605    HMI_DEBUG("wm", "%s: %s(%s, %s)", __func__, evname, label, area);
 606
 607    json_object *j = json_object_new_object();
 608    json_object_object_add(j, kKeyDrawingName, json_object_new_string(label));
 609    json_object_object_add(j, kKeyDrawingArea, json_object_new_string(area));
 610
 611    int ret = afb_event_push(this->map_afb_event[evname], j);
 612    if (ret != 0) {
 613       HMI_DEBUG("wm", "afb_event_push failed: %m");
 614    }
 615 }
 616
 617 /**
 618  * proxied events
 619  */
 620 void App::surface_created(uint32_t surface_id) {
 621    auto layer_id = this->layers.get_layer_id(surface_id);
 622    if (!layer_id) {
 623       HMI_DEBUG("wm", "Newly created surfce %d is not associated with any layer!",
 624                surface_id);
 625       return;
 626    }
 627
 628    HMI_DEBUG("wm", "surface_id is %u, layer_id is %u", surface_id, *layer_id);
 629
 630    this->controller->layers[*layer_id]->add_surface(
 631       this->controller->surfaces[surface_id].get());
 632
 633    // activate the main_surface right away
 634    /*if (surface_id == static_cast<unsigned>(this->layers.main_surface)) {
 635       HMI_DEBUG("wm", "Activating main_surface (%d)", surface_id);
 636
 637       this->api_activate_surface(
 638          this->lookup_name(surface_id).value_or("unknown-name").c_str());
 639    }*/
 640 }
 641
 642 void App::surface_removed(uint32_t surface_id) {
 643    HMI_DEBUG("wm", "surface_id is %u", surface_id);
 644
 645    // We cannot normally deactivate the main_surface, so be explicit
 646    // about it:
 647    if (int(surface_id) == this->layers.main_surface) {
 648       this->deactivate_main_surface();
 649    } else {
 650       auto drawing_name = this->lookup_name(surface_id);
 651       if (drawing_name) {
 652          this->api_deactivate_surface(drawing_name->c_str());
 653       }
 654    }
 655
 656    this->id_alloc.remove_id(surface_id);
 657    this->layers.remove_surface(surface_id);
 658 }
 659
 660 void App::emit_activated(char const *label) {
 661    this->send_event(kListEventName[Event_Active], label);
 662 }
 663
 664 void App::emit_deactivated(char const *label) {
 665    this->send_event(kListEventName[Event_Inactive], label);
 666 }
 667
 668 void App::emit_syncdraw(char const *label, char const *area) {
 669     this->send_event(kListEventName[Event_SyncDraw], label, area);
 670 }
 671
 672 void App::emit_flushdraw(char const *label) {
 673    this->send_event(kListEventName[Event_FlushDraw], label);
 674 }
 675
 676 void App::emit_visible(char const *label, bool is_visible) {
 677    this->send_event(is_visible ? kListEventName[Event_Visible] : kListEventName[Event_Invisible], label);
 678 }
 679
 680 void App::emit_invisible(char const *label) {
 681    return emit_visible(label, false);
 682 }
 683
 684 void App::emit_visible(char const *label) { return emit_visible(label, true); }
 685
 686 result<int> App::api_request_surface(char const *drawing_name) {
 687    auto lid = this->layers.get_layer_id(std::string(drawing_name));
 688    if (!lid) {
 689       // TODO: Do we need to put these applications on the App layer?
 690       return Err<int>("Drawing name does not match any role");
 691    }
 692
 693    auto rname = this->lookup_id(drawing_name);
 694    if (!rname) {
 695       // name does not exist yet, allocate surface id...
 696       auto id = int(this->id_alloc.generate_id(drawing_name));
 697       this->layers.add_surface(id, *lid);
 698
 699       // set the main_surface[_name] here and now
 700       if (!this->layers.main_surface_name.empty() &&
 701           this->layers.main_surface_name == drawing_name) {
 702          this->layers.main_surface = id;
 703          HMI_DEBUG("wm", "Set main_surface id to %u", id);
 704       }
 705
 706       return Ok<int>(id);
 707    }
 708
 709    // Check currently registered drawing names if it is already there.
 710    return Err<int>("Surface already present");
 711 }
 712
 713 char const *App::api_request_surface(char const *drawing_name,
 714                                      char const *ivi_id) {
 715    ST();
 716
 717    auto lid = this->layers.get_layer_id(std::string(drawing_name));
 718    unsigned sid = std::stol(ivi_id);
 719
 720    if (!lid) {
 721        return "Drawing name does not match any role";
 722    }
 723
 724    auto rname = this->lookup_id(drawing_name);
 725
 726    if (rname) {
 727        return "Surface already present";
 728    }
 729
 730    // register pair drawing_name and ivi_id
 731    this->id_alloc.register_name_id(drawing_name, sid);
 732    this->layers.add_surface(sid, *lid);
 733
 734    // this surface is already created
 735    HMI_DEBUG("wm", "surface_id is %u, layer_id is %u", sid, *lid);
 736
 737    this->controller->layers[*lid]->add_surface(
 738        this->controller->surfaces[sid].get());
 739
 740    return nullptr;
 741 }
 742
 743 void App::activate(int id) {
 744    auto ip = this->controller->sprops.find(id);
 745    if (ip != this->controller->sprops.end()) {
 746       this->controller->surfaces[id]->set_visibility(0);
 747       this->layout_commit();
 748       this->controller->surfaces[id]->set_visibility(1);
 749       char const *label =
 750          this->lookup_name(id).value_or("unknown-name").c_str();
 751
 752       // FOR CES DEMO >>>
 753       if ((0 == strcmp(label, "Radio"))
 754           || (0 == strcmp(label, "MediaPlayer"))
 755           || (0 == strcmp(label, "Navigation"))) {
 756         for (auto i = surface_bg.begin(); i != surface_bg.end(); ++i) {
 757             if (id == *i) {
 758                // Remove id
 759                this->surface_bg.erase(i);
 760
 761                // Remove from BG layer (999)
 762                HMI_DEBUG("wm", "Remove %s(%d) from BG layer", label, id);
 763                this->controller->layers[999]->remove_surface(
 764                   this->controller->surfaces[id].get());
 765
 766                // Add to FG layer (1001)
 767                HMI_DEBUG("wm", "Add %s(%d) to FG layer", label, id);
 768                this->controller->layers[1001]->add_surface(
 769                   this->controller->surfaces[id].get());
 770
 771                for (int j : this->surface_bg) {
 772                  HMI_DEBUG("wm", "Stored id:%d", j);
 773                }
 774                break;
 775             }
 776          }
 777       }
 778       // <<< FOR CES DEMO
 779
 780       this->emit_visible(label);
 781       this->emit_activated(label);
 782    }
 783 }
 784
 785 void App::deactivate(int id) {
 786    auto ip = this->controller->sprops.find(id);
 787    if (ip != this->controller->sprops.end() && ip->second.visibility != 0) {
 788       char const *label =
 789          this->lookup_name(id).value_or("unknown-name").c_str();
 790
 791       // FOR CES DEMO >>>
 792       if ((0 == strcmp(label, "Radio"))
 793           || (0 == strcmp(label, "MediaPlayer"))
 794           || (0 == strcmp(label, "Navigation"))) {
 795
 796          // Store id
 797          this->surface_bg.push_back(id);
 798
 799          // Remove from FG layer (1001)
 800          HMI_DEBUG("wm", "Remove %s(%d) from FG layer", label, id);
 801          this->controller->layers[1001]->remove_surface(
 802             this->controller->surfaces[id].get());
 803
 804          // Add to BG layer (999)
 805          HMI_DEBUG("wm", "Add %s(%d) to BG layer", label, id);
 806          this->controller->layers[999]->add_surface(
 807             this->controller->surfaces[id].get());
 808
 809          for (int j : surface_bg) {
 810             HMI_DEBUG("wm", "Stored id:%d", j);
 811          }
 812       }
 813       else {
 814          this->controller->surfaces[id]->set_visibility(0);
 815       }
 816       // <<< FOR CES DEMO
 817
 818       this->emit_deactivated(label);
 819       this->emit_invisible(label);
 820    }
 821 }
 822
 823 void App::deactivate_main_surface() {
 824    this->layers.main_surface = -1;
 825    this->api_deactivate_surface(this->layers.main_surface_name.c_str());
 826 }
 827
 828 bool App::can_split(struct LayoutState const &state, int new_id) {
 829    if (state.main != -1 && state.main != new_id) {
 830       auto new_id_layer = this->layers.get_layer_id(new_id).value();
 831       auto current_id_layer = this->layers.get_layer_id(state.main).value();
 832
 833       // surfaces are on separate layers, don't bother.
 834       if (new_id_layer != current_id_layer) {
 835          return false;
 836       }
 837
 838       std::string const &new_id_str = this->lookup_name(new_id).value();
 839       std::string const &cur_id_str = this->lookup_name(state.main).value();
 840
 841       auto const &layer = this->layers.get_layer(new_id_layer);
 842
 843       HMI_DEBUG("wm", "layer info name: %s", layer->name.c_str());
 844
 845       if (layer->layouts.empty()) {
 846          return false;
 847       }
 848
 849       for (auto i = layer->layouts.cbegin(); i != layer->layouts.cend(); i++) {
 850          HMI_DEBUG("wm", "%d main_match '%s'", new_id_layer, i->main_match.c_str());
 851          auto rem = std::regex(i->main_match);
 852          if (std::regex_match(cur_id_str, rem)) {
 853             // build the second one only if the first already matched
 854             HMI_DEBUG("wm", "%d sub_match '%s'", new_id_layer, i->sub_match.c_str());
 855             auto res = std::regex(i->sub_match);
 856             if (std::regex_match(new_id_str, res)) {
 857                HMI_DEBUG("wm", "layout matched!");
 858                return true;
 859             }
 860          }
 861       }
 862    }
 863
 864    return false;
 865 }
 866
 867 void App::try_layout(struct LayoutState & /*state*/,
 868                      struct LayoutState const &new_layout,
 869                      std::function<void(LayoutState const &nl)> apply) {
 870    if (this->policy.layout_is_valid(new_layout)) {
 871       apply(new_layout);
 872    }
 873 }
 874
 875 /**
 876  * controller_hooks
 877  */
 878 void controller_hooks::surface_created(uint32_t surface_id) {
 879    this->app->surface_created(surface_id);
 880 }
 881
 882 void controller_hooks::surface_removed(uint32_t surface_id) {
 883    this->app->surface_removed(surface_id);
 884 }
 885
 886 void controller_hooks::surface_visibility(uint32_t /*surface_id*/,
 887                                           uint32_t /*v*/) {}
 888
 889 void controller_hooks::surface_destination_rectangle(uint32_t /*surface_id*/,
 890                                                      uint32_t /*x*/,
 891                                                      uint32_t /*y*/,
 892                                                      uint32_t /*w*/,
 893                                                      uint32_t /*h*/) {}
 894
 895 }  // namespace wm