src/app.cpp

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