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    : api{this},
  80      chooks{this},
  81      display{d},
  82      controller{},
  83      outputs(),
  84      config(),
  85      layers(),
  86      id_alloc{},
  87      pending_events(false),
  88      policy{} {
  89    try {
  90       {
  91          auto l = load_layer_map(
  92             this->config.get_string("layers.json").value().c_str());
  93          if (l.is_ok()) {
  94             this->layers = l.unwrap();
  95          } else {
  96             HMI_ERROR("wm", "%s", l.err().value());
  97          }
  98       }
  99    } catch (std::exception &e) {
 100       HMI_ERROR("wm", "Loading of configuration failed: %s", e.what());
 101    }
 102 }
 103
 104 int App::init() {
 105    if (!this->display->ok()) {
 106       return -1;
 107    }
 108
 109    if (this->layers.mapping.empty()) {
 110       HMI_ERROR("wm", "No surface -> layer mapping loaded");
 111       return -1;
 112    }
 113
 114    // Make afb event
 115    for (int i=Event_Val_Min; i<=Event_Val_Max; i++) {
 116       map_afb_event[kListEventName[i]] = afb_daemon_make_event(kListEventName[i]);
 117    }
 118
 119    this->display->add_global_handler(
 120       "wl_output", [this](wl_registry *r, uint32_t name, uint32_t v) {
 121          this->outputs.emplace_back(std::make_unique<wl::output>(r, name, v));
 122       });
 123
 124    this->display->add_global_handler(
 125       "ivi_controller", [this](wl_registry *r, uint32_t name, uint32_t v) {
 126          this->controller =
 127             std::make_unique<struct compositor::controller>(r, name, v);
 128
 129          // Init controller hooks
 130          this->controller->chooks = &this->chooks;
 131
 132          // This protocol needs the output, so lets just add our mapping here...
 133          this->controller->add_proxy_to_id_mapping(
 134             this->outputs.back()->proxy.get(),
 135             wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
 136                this->outputs.back()->proxy.get())));
 137       });
 138
 139    // First level objects
 140    this->display->roundtrip();
 141    // Second level objects
 142    this->display->roundtrip();
 143    // Third level objects
 144    this->display->roundtrip();
 145
 146    return init_layers();
 147 }
 148
 149 int App::dispatch_events() {
 150    if (this->dispatch_events() == 0) {
 151       return 0;
 152    }
 153
 154    int ret = this->display->dispatch();
 155    if (ret == -1) {
 156       HMI_ERROR("wm", "wl_display_dipatch() returned error %d",
 157                this->display->get_error());
 158       return -1;
 159    }
 160    this->display->flush();
 161
 162    return 0;
 163 }
 164
 165 int App::dispatch_pending_events() {
 166    if (this->pop_pending_events()) {
 167       this->display->dispatch_pending();
 168       return 0;
 169    }
 170    return -1;
 171 }
 172
 173 bool App::pop_pending_events() {
 174    bool x{true};
 175    return this->pending_events.compare_exchange_strong(
 176       x, false, std::memory_order_consume);
 177 }
 178
 179 void App::set_pending_events() {
 180    this->pending_events.store(true, std::memory_order_release);
 181 }
 182
 183 optional<int> App::lookup_id(char const *name) {
 184    return this->id_alloc.lookup(std::string(name));
 185 }
 186 optional<std::string> App::lookup_name(int id) {
 187    return this->id_alloc.lookup(id);
 188 }
 189
 190 /**
 191  * init_layers()
 192  */
 193 int App::init_layers() {
 194    if (!this->controller) {
 195       HMI_ERROR("wm", "ivi_controller global not available");
 196       return -1;
 197    }
 198
 199    if (this->outputs.empty()) {
 200       HMI_ERROR("wm", "no output was set up!");
 201       return -1;
 202    }
 203
 204    auto &c = this->controller;
 205
 206    auto &o = this->outputs.front();
 207    auto &s = c->screens.begin()->second;
 208    auto &layers = c->layers;
 209
 210    // Write output dimensions to ivi controller...
 211    c->output_size = compositor::size{uint32_t(o->width), uint32_t(o->height)};
 212
 213    // Clear scene
 214    layers.clear();
 215
 216    // Clear screen
 217    s->clear();
 218
 219    // Quick and dirty setup of layers
 220    for (auto const &i : this->layers.mapping) {
 221       c->layer_create(i.second.layer_id, o->width, o->height);
 222       auto &l = layers[i.second.layer_id];
 223       l->set_destination_rectangle(0, 0, o->width, o->height);
 224       l->set_visibility(1);
 225       HMI_DEBUG("wm", "Setting up layer %s (%d) for surface role match \"%s\"",
 226                i.second.name.c_str(), i.second.layer_id, i.second.role.c_str());
 227    }
 228
 229    // Add layers to screen
 230    s->set_render_order(this->layers.layers);
 231
 232    this->layout_commit();
 233
 234    return 0;
 235 }
 236
 237 void App::surface_set_layout(int surface_id, optional<int> sub_surface_id) {
 238    if (!this->controller->surface_exists(surface_id)) {
 239       HMI_ERROR("wm", "Surface %d does not exist", surface_id);
 240       return;
 241    }
 242
 243    auto o_layer_id = this->layers.get_layer_id(surface_id);
 244
 245    if (!o_layer_id) {
 246       HMI_ERROR("wm", "Surface %d is not associated with any layer!", surface_id);
 247       return;
 248    }
 249
 250    uint32_t layer_id = *o_layer_id;
 251
 252    auto const &layer = this->layers.get_layer(layer_id);
 253    auto rect = layer.value().rect;
 254    auto &s = this->controller->surfaces[surface_id];
 255
 256    int x = rect.x;
 257    int y = rect.y;
 258    int w = rect.w;
 259    int h = rect.h;
 260
 261    // less-than-0 values refer to MAX + 1 - $VALUE
 262    // e.g. MAX is either screen width or height
 263    if (w < 0) {
 264       w = this->controller->output_size.w + 1 + w;
 265    }
 266    if (h < 0) {
 267       h = this->controller->output_size.h + 1 + h;
 268    }
 269
 270    if (sub_surface_id) {
 271       if (o_layer_id != this->layers.get_layer_id(*sub_surface_id)) {
 272          HMI_ERROR("wm",
 273             "surface_set_layout: layers of surfaces (%d and %d) don't match!",
 274             surface_id, *sub_surface_id);
 275          return;
 276       }
 277
 278       int x_off = 0;
 279       int y_off = 0;
 280
 281       // split along major axis
 282       if (w > h) {
 283          w /= 2;
 284          x_off = w;
 285       } else {
 286          h /= 2;
 287          y_off = h;
 288       }
 289
 290       auto &ss = this->controller->surfaces[*sub_surface_id];
 291
 292       HMI_DEBUG("wm", "surface_set_layout for sub surface %u on layer %u",
 293                *sub_surface_id, layer_id);
 294
 295       // configure surface to wxh dimensions
 296       ss->set_configuration(w, h);
 297       // set source reactangle, even if we should not need to set it.
 298       ss->set_source_rectangle(0, 0, w, h);
 299       // set destination to the display rectangle
 300       ss->set_destination_rectangle(x + x_off, y + y_off, w, h);
 301
 302    }
 303
 304    HMI_DEBUG("wm", "surface_set_layout for surface %u on layer %u", surface_id,
 305             layer_id);
 306
 307    // configure surface to wxh dimensions
 308    s->set_configuration(w, h);
 309    // set source reactangle, even if we should not need to set it.
 310    s->set_source_rectangle(0, 0, w, h);
 311
 312    // set destination to the display rectangle
 313    s->set_destination_rectangle(x, y, w, h);
 314
 315    HMI_DEBUG("wm", "Surface %u now on layer %u with rect { %d, %d, %d, %d }",
 316             surface_id, layer_id, x, y, w, h);
 317 }
 318
 319 void App::layout_commit() {
 320    this->controller->commit_changes();
 321    this->display->flush();
 322 }
 323
 324 char const *App::api_activate_surface(char const *drawing_name, char const *drawing_area) {
 325    ST();
 326
 327    auto const &surface_id = this->lookup_id(drawing_name);
 328
 329    if (!surface_id) {
 330       return "Surface does not exist";
 331    }
 332
 333    if (!this->controller->surface_exists(*surface_id)) {
 334       return "Surface does not exist in controller!";
 335    }
 336
 337    auto layer_id = this->layers.get_layer_id(*surface_id);
 338
 339    if (!layer_id) {
 340       return "Surface is not on any layer!";
 341    }
 342
 343    auto o_state = *this->layers.get_layout_state(*surface_id);
 344
 345    if (o_state == nullptr) {
 346       return "Could not find layer for surface";
 347    }
 348
 349    struct LayoutState &state = *o_state;
 350
 351    // disable layers that are above our current layer
 352    for (auto const &l : this->layers.mapping) {
 353       if (l.second.layer_id <= *layer_id) {
 354          continue;
 355       }
 356
 357       bool flush = false;
 358       if (l.second.state.main != -1) {
 359          this->deactivate(l.second.state.main);
 360          l.second.state.main = -1;
 361          flush = true;
 362       }
 363
 364       if (l.second.state.sub != -1) {
 365          this->deactivate(l.second.state.sub);
 366          l.second.state.sub = -1;
 367          flush = true;
 368       }
 369
 370       if (flush) {
 371          this->layout_commit();
 372       }
 373    }
 374
 375    auto layer = this->layers.get_layer(*layer_id);
 376
 377    if (state.main == -1) {
 378       this->try_layout(
 379          state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 380             HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 381             this->surface_set_layout(*surface_id);
 382             state = nl;
 383
 384             // Commit for configuraton
 385             this->layout_commit();
 386
 387             if (!(layer->is_normal_layout_only)) {
 388                // Wait for configuration listener
 389                controller->is_configured = false;
 390                while (!(controller->is_configured)) {
 391                   dispatch_pending_events();
 392                }
 393             }
 394
 395             std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 396             this->emit_syncdraw(drawing_name, str_area.c_str());
 397             this->enqueue_flushdraw(state.main);
 398          });
 399    } else {
 400       if (0 == strcmp(drawing_name, "HomeScreen")) {
 401          this->try_layout(
 402             state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 403                HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 404                std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 405                this->emit_syncdraw(drawing_name, str_area.c_str());
 406                this->enqueue_flushdraw(state.main);
 407             });
 408       } else {
 409          bool can_split = this->can_split(state, *surface_id);
 410
 411          if (can_split) {
 412             this->try_layout(
 413                state,
 414                LayoutState{state.main, *surface_id},
 415                [&] (LayoutState const &nl) {
 416                   HMI_DEBUG("wm", "Layout: %s", kNameLayoutSplit);
 417                   std::string main =
 418                      std::move(*this->lookup_name(state.main));
 419
 420                   this->surface_set_layout(state.main, surface_id);
 421                   if (state.sub != *surface_id) {
 422                       if (state.sub != -1) {
 423                          this->deactivate(state.sub);
 424                       }
 425                   }
 426                   state = nl;
 427
 428                   // Commit for configuraton and visibility(0)
 429                   this->layout_commit();
 430
 431                   // Wait for configuration listener
 432                   controller->is_configured = false;
 433                   while (!(controller->is_configured)) {
 434                      dispatch_pending_events();
 435                   }
 436
 437                   std::string str_area_main = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaMain);
 438                   std::string str_area_sub = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaSub);
 439                   this->emit_syncdraw(main.c_str(), str_area_main.c_str());
 440                   this->emit_syncdraw(drawing_name, str_area_sub.c_str());
 441                   this->enqueue_flushdraw(state.main);
 442                   this->enqueue_flushdraw(state.sub);
 443                });
 444          } else {
 445             this->try_layout(
 446                state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 447                   HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 448
 449                   this->surface_set_layout(*surface_id);
 450                   if (state.main != *surface_id) {
 451                       this->deactivate(state.main);
 452                   }
 453                   if (state.sub != -1) {
 454                       if (state.sub != *surface_id) {
 455                          this->deactivate(state.sub);
 456                       }
 457                   }
 458                   state = nl;
 459
 460                   // Commit for configuraton and visibility(0)
 461                   this->layout_commit();
 462
 463                   if (!(layer->is_normal_layout_only)) {
 464                      // Wait for configuration listener
 465                      controller->is_configured = false;
 466                      while (!(controller->is_configured)) {
 467                         dispatch_pending_events();
 468                      }
 469                   }
 470
 471                   std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 472                   this->emit_syncdraw(drawing_name, str_area.c_str());
 473                   this->enqueue_flushdraw(state.main);
 474                });
 475          }
 476       }
 477    }
 478
 479    // no error
 480    return nullptr;
 481 }
 482
 483 char const *App::api_deactivate_surface(char const *drawing_name) {
 484    ST();
 485    auto const &surface_id = this->lookup_id(drawing_name);
 486
 487    if (!surface_id) {
 488          return "Surface does not exist";
 489       }
 490
 491    if (*surface_id == this->layers.main_surface) {
 492       return "Cannot deactivate main_surface";
 493    }
 494
 495    auto o_state = *this->layers.get_layout_state(*surface_id);
 496
 497    if (o_state == nullptr) {
 498       return "Could not find layer for surface";
 499    }
 500
 501    struct LayoutState &state = *o_state;
 502
 503    if (state.main == -1) {
 504       return "No surface active";
 505    }
 506
 507    // XXX: check against main_surface, main_surface_name is the configuration
 508    // item.
 509    if (*surface_id == this->layers.main_surface) {
 510       HMI_DEBUG("wm", "Refusing to deactivate main_surface %d", *surface_id);
 511       return nullptr;
 512    }
 513
 514    if (state.main == *surface_id) {
 515       if (state.sub != -1) {
 516          this->try_layout(
 517             state, LayoutState{state.sub, -1}, [&] (LayoutState const &nl) {
 518                std::string sub = std::move(*this->lookup_name(state.sub));
 519
 520                this->deactivate(*surface_id);
 521                this->surface_set_layout(state.sub);
 522                state = nl;
 523
 524                this->layout_commit();
 525                std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 526                this->emit_syncdraw(sub.c_str(), str_area.c_str());
 527                this->enqueue_flushdraw(state.sub);
 528             });
 529       } else {
 530          this->try_layout(state, LayoutState{-1, -1}, [&] (LayoutState const &nl) {
 531             this->deactivate(*surface_id);
 532             state = nl;
 533             this->layout_commit();
 534          });
 535       }
 536    } else if (state.sub == *surface_id) {
 537       this->try_layout(
 538          state, LayoutState{state.main, -1}, [&] (LayoutState const &nl) {
 539             std::string main = std::move(*this->lookup_name(state.main));
 540
 541             this->deactivate(*surface_id);
 542             this->surface_set_layout(state.main);
 543             state = nl;
 544
 545             this->layout_commit();
 546             std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 547             this->emit_syncdraw(main.c_str(), str_area.c_str());
 548             this->enqueue_flushdraw(state.main);
 549          });
 550    } else {
 551       return "Surface is not active";
 552    }
 553
 554    return nullptr;
 555 }
 556
 557 void App::enqueue_flushdraw(int surface_id) {
 558    this->check_flushdraw(surface_id);
 559    HMI_DEBUG("wm", "Enqueuing EndDraw for surface_id %d", surface_id);
 560    this->pending_end_draw.push_back(surface_id);
 561 }
 562
 563 void App::check_flushdraw(int surface_id) {
 564    auto i = std::find(std::begin(this->pending_end_draw),
 565                       std::end(this->pending_end_draw), surface_id);
 566    if (i != std::end(this->pending_end_draw)) {
 567       auto n = this->lookup_name(surface_id);
 568       HMI_ERROR("wm", "Application %s (%d) has pending EndDraw call(s)!",
 569                n ? n->c_str() : "unknown-name", surface_id);
 570       std::swap(this->pending_end_draw[std::distance(
 571                    std::begin(this->pending_end_draw), i)],
 572                 this->pending_end_draw.back());
 573       this->pending_end_draw.resize(this->pending_end_draw.size() - 1);
 574    }
 575 }
 576
 577 char const *App::api_enddraw(char const *drawing_name) {
 578    for (unsigned i = 0, iend = this->pending_end_draw.size(); i < iend; i++) {
 579       auto n = this->lookup_name(this->pending_end_draw[i]);
 580       if (n && *n == drawing_name) {
 581          std::swap(this->pending_end_draw[i], this->pending_end_draw[iend - 1]);
 582          this->pending_end_draw.resize(iend - 1);
 583          // XXX: Please tell the compositor to thaw the surface...
 584          this->activate(this->pending_end_draw[i]);
 585          this->layout_commit();
 586          this->emit_flushdraw(drawing_name);
 587          return nullptr;
 588       }
 589    }
 590    return "No EndDraw pending for surface";
 591 }
 592
 593 void App::api_ping() { this->dispatch_pending_events(); }
 594
 595 /**
 596  * proxied events
 597  */
 598 void App::surface_created(uint32_t surface_id) {
 599    auto layer_id = this->layers.get_layer_id(surface_id);
 600    if (!layer_id) {
 601       HMI_DEBUG("wm", "Newly created surfce %d is not associated with any layer!",
 602                surface_id);
 603       return;
 604    }
 605
 606    HMI_DEBUG("wm", "surface_id is %u, layer_id is %u", surface_id, *layer_id);
 607
 608    this->controller->layers[*layer_id]->add_surface(
 609       this->controller->surfaces[surface_id].get());
 610
 611    // activate the main_surface right away
 612    /*if (surface_id == static_cast<unsigned>(this->layers.main_surface)) {
 613       HMI_DEBUG("wm", "Activating main_surface (%d)", surface_id);
 614
 615       this->api_activate_surface(
 616          this->lookup_name(surface_id).value_or("unknown-name").c_str());
 617    }*/
 618 }
 619
 620 void App::surface_removed(uint32_t surface_id) {
 621    HMI_DEBUG("wm", "surface_id is %u", surface_id);
 622
 623    // We cannot normally deactivate the main_surface, so be explicit
 624    // about it:
 625    if (int(surface_id) == this->layers.main_surface) {
 626       this->deactivate_main_surface();
 627    } else {
 628       auto drawing_name = this->lookup_name(surface_id);
 629       if (drawing_name) {
 630          this->api_deactivate_surface(drawing_name->c_str());
 631       }
 632    }
 633
 634    this->id_alloc.remove_id(surface_id);
 635    this->layers.remove_surface(surface_id);
 636 }
 637
 638 void App::emit_activated(char const *label) {
 639    this->api.send_event(kListEventName[Event_Active], label);
 640 }
 641
 642 void App::emit_deactivated(char const *label) {
 643    this->api.send_event(kListEventName[Event_Inactive], label);
 644 }
 645
 646 void App::emit_syncdraw(char const *label, char const *area) {
 647     this->api.send_event(kListEventName[Event_SyncDraw], label, area);
 648 }
 649
 650 void App::emit_flushdraw(char const *label) {
 651    this->api.send_event(kListEventName[Event_FlushDraw], label);
 652 }
 653
 654 void App::emit_visible(char const *label, bool is_visible) {
 655    this->api.send_event(is_visible ? kListEventName[Event_Visible] : kListEventName[Event_Invisible], label);
 656 }
 657
 658 void App::emit_invisible(char const *label) {
 659    return emit_visible(label, false);
 660 }
 661
 662 void App::emit_visible(char const *label) { return emit_visible(label, true); }
 663
 664 result<int> App::api_request_surface(char const *drawing_name) {
 665    auto lid = this->layers.get_layer_id(std::string(drawing_name));
 666    if (!lid) {
 667       // TODO: Do we need to put these applications on the App layer?
 668       return Err<int>("Drawing name does not match any role");
 669    }
 670
 671    auto rname = this->lookup_id(drawing_name);
 672    if (!rname) {
 673       // name does not exist yet, allocate surface id...
 674       auto id = int(this->id_alloc.generate_id(drawing_name));
 675       this->layers.add_surface(id, *lid);
 676
 677       // set the main_surface[_name] here and now
 678       if (!this->layers.main_surface_name.empty() &&
 679           this->layers.main_surface_name == drawing_name) {
 680          this->layers.main_surface = id;
 681          HMI_DEBUG("wm", "Set main_surface id to %u", id);
 682       }
 683
 684       return Ok<int>(id);
 685    }
 686
 687    // Check currently registered drawing names if it is already there.
 688    return Err<int>("Surface already present");
 689 }
 690
 691 void App::activate(int id) {
 692    auto ip = this->controller->sprops.find(id);
 693    if (ip != this->controller->sprops.end()) {
 694       this->controller->surfaces[id]->set_visibility(0);
 695       this->layout_commit();
 696       this->controller->surfaces[id]->set_visibility(1);
 697       char const *label =
 698          this->lookup_name(id).value_or("unknown-name").c_str();
 699       this->emit_visible(label);
 700       this->emit_activated(label);
 701    }
 702 }
 703
 704 void App::deactivate(int id) {
 705    auto ip = this->controller->sprops.find(id);
 706    if (ip != this->controller->sprops.end() && ip->second.visibility != 0) {
 707       this->controller->surfaces[id]->set_visibility(0);
 708       char const *label =
 709          this->lookup_name(id).value_or("unknown-name").c_str();
 710       this->emit_deactivated(label);
 711       this->emit_invisible(label);
 712    }
 713 }
 714
 715 void App::deactivate_main_surface() {
 716    this->layers.main_surface = -1;
 717    this->api_deactivate_surface(this->layers.main_surface_name.c_str());
 718 }
 719
 720 bool App::can_split(struct LayoutState const &state, int new_id) {
 721    if (state.main != -1 && state.main != new_id) {
 722       auto new_id_layer = this->layers.get_layer_id(new_id).value();
 723       auto current_id_layer = this->layers.get_layer_id(state.main).value();
 724
 725       // surfaces are on separate layers, don't bother.
 726       if (new_id_layer != current_id_layer) {
 727          return false;
 728       }
 729
 730       std::string const &new_id_str = this->lookup_name(new_id).value();
 731       std::string const &cur_id_str = this->lookup_name(state.main).value();
 732
 733       auto const &layer = this->layers.get_layer(new_id_layer);
 734
 735       HMI_DEBUG("wm", "layer info name: %s", layer->name.c_str());
 736
 737       if (layer->layouts.empty()) {
 738          return false;
 739       }
 740
 741       for (auto i = layer->layouts.cbegin(); i != layer->layouts.cend(); i++) {
 742          HMI_DEBUG("wm", "%d main_match '%s'", new_id_layer, i->main_match.c_str());
 743          auto rem = std::regex(i->main_match);
 744          if (std::regex_match(cur_id_str, rem)) {
 745             // build the second one only if the first already matched
 746             HMI_DEBUG("wm", "%d sub_match '%s'", new_id_layer, i->sub_match.c_str());
 747             auto res = std::regex(i->sub_match);
 748             if (std::regex_match(new_id_str, res)) {
 749                HMI_DEBUG("wm", "layout matched!");
 750                return true;
 751             }
 752          }
 753       }
 754    }
 755
 756    return false;
 757 }
 758
 759 void App::try_layout(struct LayoutState & /*state*/,
 760                      struct LayoutState const &new_layout,
 761                      std::function<void(LayoutState const &nl)> apply) {
 762    if (this->policy.layout_is_valid(new_layout)) {
 763       apply(new_layout);
 764    }
 765 }
 766
 767 /**
 768  * controller_hooks
 769  */
 770 void controller_hooks::surface_created(uint32_t surface_id) {
 771    this->app->surface_created(surface_id);
 772 }
 773
 774 void controller_hooks::surface_removed(uint32_t surface_id) {
 775    this->app->surface_removed(surface_id);
 776 }
 777
 778 void controller_hooks::surface_visibility(uint32_t /*surface_id*/,
 779                                           uint32_t /*v*/) {}
 780
 781 void controller_hooks::surface_destination_rectangle(uint32_t /*surface_id*/,
 782                                                      uint32_t /*x*/,
 783                                                      uint32_t /*y*/,
 784                                                      uint32_t /*w*/,
 785                                                      uint32_t /*h*/) {}
 786
 787 }  // namespace wm