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    c->physical_size = compositor::size{uint32_t(o->physical_width),
 213                                        uint32_t(o->physical_height)};
 214
 215    // Clear scene
 216    layers.clear();
 217
 218    // Clear screen
 219    s->clear();
 220
 221    // Quick and dirty setup of layers
 222    for (auto const &i : this->layers.mapping) {
 223       c->layer_create(i.second.layer_id, o->width, o->height);
 224       auto &l = layers[i.second.layer_id];
 225       l->set_destination_rectangle(0, 0, o->width, o->height);
 226       l->set_visibility(1);
 227       HMI_DEBUG("wm", "Setting up layer %s (%d) for surface role match \"%s\"",
 228                i.second.name.c_str(), i.second.layer_id, i.second.role.c_str());
 229    }
 230
 231    // Add layers to screen
 232    s->set_render_order(this->layers.layers);
 233
 234    this->layout_commit();
 235
 236    return 0;
 237 }
 238
 239 void App::surface_set_layout(int surface_id, optional<int> sub_surface_id) {
 240    if (!this->controller->surface_exists(surface_id)) {
 241       HMI_ERROR("wm", "Surface %d does not exist", surface_id);
 242       return;
 243    }
 244
 245    auto o_layer_id = this->layers.get_layer_id(surface_id);
 246
 247    if (!o_layer_id) {
 248       HMI_ERROR("wm", "Surface %d is not associated with any layer!", surface_id);
 249       return;
 250    }
 251
 252    uint32_t layer_id = *o_layer_id;
 253
 254    auto const &layer = this->layers.get_layer(layer_id);
 255    auto rect = layer.value().rect;
 256    auto &s = this->controller->surfaces[surface_id];
 257
 258    int x = rect.x;
 259    int y = rect.y;
 260    int w = rect.w;
 261    int h = rect.h;
 262
 263    // less-than-0 values refer to MAX + 1 - $VALUE
 264    // e.g. MAX is either screen width or height
 265    if (w < 0) {
 266       w = this->controller->output_size.w + 1 + w;
 267    }
 268    if (h < 0) {
 269       h = this->controller->output_size.h + 1 + h;
 270    }
 271
 272    if (sub_surface_id) {
 273       if (o_layer_id != this->layers.get_layer_id(*sub_surface_id)) {
 274          HMI_ERROR("wm",
 275             "surface_set_layout: layers of surfaces (%d and %d) don't match!",
 276             surface_id, *sub_surface_id);
 277          return;
 278       }
 279
 280       int x_off = 0;
 281       int y_off = 0;
 282
 283       // split along major axis
 284       if (w > h) {
 285          w /= 2;
 286          x_off = w;
 287       } else {
 288          h /= 2;
 289          y_off = h;
 290       }
 291
 292       auto &ss = this->controller->surfaces[*sub_surface_id];
 293
 294       HMI_DEBUG("wm", "surface_set_layout for sub surface %u on layer %u",
 295                *sub_surface_id, layer_id);
 296
 297       // configure surface to wxh dimensions
 298       ss->set_configuration(w, h);
 299       // set source reactangle, even if we should not need to set it.
 300       ss->set_source_rectangle(0, 0, w, h);
 301       // set destination to the display rectangle
 302       ss->set_destination_rectangle(x + x_off, y + y_off, w, h);
 303
 304       this->area_info[*sub_surface_id].x = x;
 305       this->area_info[*sub_surface_id].y = y;
 306       this->area_info[*sub_surface_id].w = w;
 307       this->area_info[*sub_surface_id].h = h;
 308    }
 309
 310    HMI_DEBUG("wm", "surface_set_layout for surface %u on layer %u", surface_id,
 311             layer_id);
 312
 313    // configure surface to wxh dimensions
 314    s->set_configuration(w, h);
 315    // set source reactangle, even if we should not need to set it.
 316    s->set_source_rectangle(0, 0, w, h);
 317
 318    // set destination to the display rectangle
 319    s->set_destination_rectangle(x, y, w, h);
 320
 321    // update area information
 322    this->area_info[surface_id].x = x;
 323    this->area_info[surface_id].y = y;
 324    this->area_info[surface_id].w = w;
 325    this->area_info[surface_id].h = h;
 326
 327    HMI_DEBUG("wm", "Surface %u now on layer %u with rect { %d, %d, %d, %d }",
 328             surface_id, layer_id, x, y, w, h);
 329 }
 330
 331 void App::layout_commit() {
 332    this->controller->commit_changes();
 333    this->display->flush();
 334 }
 335
 336 char const *App::api_activate_surface(char const *drawing_name, char const *drawing_area) {
 337    ST();
 338
 339    auto const &surface_id = this->lookup_id(drawing_name);
 340
 341    if (!surface_id) {
 342       return "Surface does not exist";
 343    }
 344
 345    if (!this->controller->surface_exists(*surface_id)) {
 346       return "Surface does not exist in controller!";
 347    }
 348
 349    auto layer_id = this->layers.get_layer_id(*surface_id);
 350
 351    if (!layer_id) {
 352       return "Surface is not on any layer!";
 353    }
 354
 355    auto o_state = *this->layers.get_layout_state(*surface_id);
 356
 357    if (o_state == nullptr) {
 358       return "Could not find layer for surface";
 359    }
 360
 361    struct LayoutState &state = *o_state;
 362
 363    // disable layers that are above our current layer
 364    for (auto const &l : this->layers.mapping) {
 365       if (l.second.layer_id <= *layer_id) {
 366          continue;
 367       }
 368
 369       bool flush = false;
 370       if (l.second.state.main != -1) {
 371          this->deactivate(l.second.state.main);
 372          l.second.state.main = -1;
 373          flush = true;
 374       }
 375
 376       if (l.second.state.sub != -1) {
 377          this->deactivate(l.second.state.sub);
 378          l.second.state.sub = -1;
 379          flush = true;
 380       }
 381
 382       if (flush) {
 383          this->layout_commit();
 384       }
 385    }
 386
 387    auto layer = this->layers.get_layer(*layer_id);
 388
 389    if (state.main == -1) {
 390       this->try_layout(
 391          state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 392             HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 393             this->surface_set_layout(*surface_id);
 394             state = nl;
 395
 396             // Commit for configuraton
 397             this->layout_commit();
 398
 399             if (!(layer->is_normal_layout_only)) {
 400                // Wait for configuration listener
 401                controller->is_configured = false;
 402                while (!(controller->is_configured)) {
 403                   dispatch_pending_events();
 404                }
 405             }
 406
 407             std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 408             compositor::rect area_rect = this->area_info[*surface_id];
 409             this->emit_syncdraw(drawing_name, str_area.c_str(),
 410                                 area_rect.x, area_rect.y, area_rect.w, area_rect.h);
 411             this->enqueue_flushdraw(state.main);
 412          });
 413    } else {
 414       if (0 == strcmp(drawing_name, "HomeScreen")) {
 415          this->try_layout(
 416             state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 417                HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 418                std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 419                compositor::rect area_rect = this->area_info[*surface_id];
 420                this->emit_syncdraw(drawing_name, str_area.c_str(),
 421                                    area_rect.x, area_rect.y, area_rect.w, area_rect.h);
 422                this->enqueue_flushdraw(state.main);
 423             });
 424       } else {
 425          bool can_split = this->can_split(state, *surface_id);
 426
 427          if (can_split) {
 428             this->try_layout(
 429                state,
 430                LayoutState{state.main, *surface_id},
 431                [&] (LayoutState const &nl) {
 432                   HMI_DEBUG("wm", "Layout: %s", kNameLayoutSplit);
 433                   std::string main =
 434                      std::move(*this->lookup_name(state.main));
 435
 436                   this->surface_set_layout(state.main, surface_id);
 437                   if (state.sub != *surface_id) {
 438                       if (state.sub != -1) {
 439                          this->deactivate(state.sub);
 440                       }
 441                   }
 442                   state = nl;
 443
 444                   // Commit for configuration and visibility(0)
 445                   this->layout_commit();
 446
 447                   // Wait for configuration listener
 448                   controller->is_configured = false;
 449                   while (!(controller->is_configured)) {
 450                      dispatch_pending_events();
 451                   }
 452
 453                   std::string str_area_main = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaMain);
 454                   std::string str_area_sub = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaSub);
 455                   compositor::rect area_rect_main = this->area_info[state.main];
 456                   compositor::rect area_rect_sub = this->area_info[*surface_id];
 457                   this->emit_syncdraw(main.c_str(), str_area_main.c_str(),
 458                                       area_rect_main.x, area_rect_main.y,
 459                                       area_rect_main.w, area_rect_main.h);
 460                   this->emit_syncdraw(drawing_name, str_area_sub.c_str(),
 461                                       area_rect_sub.x, area_rect_sub.y,
 462                                       area_rect_sub.w, area_rect_sub.h);
 463                   this->enqueue_flushdraw(state.main);
 464                   this->enqueue_flushdraw(state.sub);
 465                });
 466          } else {
 467             this->try_layout(
 468                state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
 469                   HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
 470
 471                   this->surface_set_layout(*surface_id);
 472                   if (state.main != *surface_id) {
 473                       this->deactivate(state.main);
 474                   }
 475                   if (state.sub != -1) {
 476                       if (state.sub != *surface_id) {
 477                          this->deactivate(state.sub);
 478                       }
 479                   }
 480                   state = nl;
 481
 482                   // Commit for configuraton and visibility(0)
 483                   this->layout_commit();
 484
 485                   if (!(layer->is_normal_layout_only)) {
 486                      // Wait for configuration listener
 487                      controller->is_configured = false;
 488                      while (!(controller->is_configured)) {
 489                         dispatch_pending_events();
 490                      }
 491                   }
 492
 493                   std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 494                   compositor::rect area_rect = this->area_info[*surface_id];
 495                   this->emit_syncdraw(drawing_name, str_area.c_str(),
 496                                       area_rect.x, area_rect.y, area_rect.w, area_rect.h);
 497                   this->enqueue_flushdraw(state.main);
 498                });
 499          }
 500       }
 501    }
 502
 503    // no error
 504    return nullptr;
 505 }
 506
 507 char const *App::api_deactivate_surface(char const *drawing_name) {
 508    ST();
 509    auto const &surface_id = this->lookup_id(drawing_name);
 510
 511    if (!surface_id) {
 512          return "Surface does not exist";
 513       }
 514
 515    if (*surface_id == this->layers.main_surface) {
 516       return "Cannot deactivate main_surface";
 517    }
 518
 519    auto o_state = *this->layers.get_layout_state(*surface_id);
 520
 521    if (o_state == nullptr) {
 522       return "Could not find layer for surface";
 523    }
 524
 525    struct LayoutState &state = *o_state;
 526
 527    if (state.main == -1) {
 528       return "No surface active";
 529    }
 530
 531    // Check against main_surface, main_surface_name is the configuration item.
 532    if (*surface_id == this->layers.main_surface) {
 533       HMI_DEBUG("wm", "Refusing to deactivate main_surface %d", *surface_id);
 534       return nullptr;
 535    }
 536
 537    if (state.main == *surface_id) {
 538       if (state.sub != -1) {
 539          this->try_layout(
 540             state, LayoutState{state.sub, -1}, [&] (LayoutState const &nl) {
 541                std::string sub = std::move(*this->lookup_name(state.sub));
 542
 543                this->deactivate(*surface_id);
 544                this->surface_set_layout(state.sub);
 545                state = nl;
 546
 547                this->layout_commit();
 548                std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 549                compositor::rect area_rect = this->area_info[state.sub];
 550                this->emit_syncdraw(sub.c_str(), str_area.c_str(),
 551                                    area_rect.x, area_rect.y, area_rect.w, area_rect.h);
 552                this->enqueue_flushdraw(state.sub);
 553             });
 554       } else {
 555          this->try_layout(state, LayoutState{-1, -1}, [&] (LayoutState const &nl) {
 556             this->deactivate(*surface_id);
 557             state = nl;
 558             this->layout_commit();
 559          });
 560       }
 561    } else if (state.sub == *surface_id) {
 562       this->try_layout(
 563          state, LayoutState{state.main, -1}, [&] (LayoutState const &nl) {
 564             std::string main = std::move(*this->lookup_name(state.main));
 565
 566             this->deactivate(*surface_id);
 567             this->surface_set_layout(state.main);
 568             state = nl;
 569
 570             this->layout_commit();
 571             std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
 572             compositor::rect area_rect = this->area_info[state.main];
 573             this->emit_syncdraw(main.c_str(), str_area.c_str(),
 574                                 area_rect.x, area_rect.y, area_rect.w, area_rect.h);
 575             this->enqueue_flushdraw(state.main);
 576          });
 577    } else {
 578       return "Surface is not active";
 579    }
 580
 581    return nullptr;
 582 }
 583
 584 void App::enqueue_flushdraw(int surface_id) {
 585    this->check_flushdraw(surface_id);
 586    HMI_DEBUG("wm", "Enqueuing EndDraw for surface_id %d", surface_id);
 587    this->pending_end_draw.push_back(surface_id);
 588 }
 589
 590 void App::check_flushdraw(int surface_id) {
 591    auto i = std::find(std::begin(this->pending_end_draw),
 592                       std::end(this->pending_end_draw), surface_id);
 593    if (i != std::end(this->pending_end_draw)) {
 594       auto n = this->lookup_name(surface_id);
 595       HMI_ERROR("wm", "Application %s (%d) has pending EndDraw call(s)!",
 596                n ? n->c_str() : "unknown-name", surface_id);
 597       std::swap(this->pending_end_draw[std::distance(
 598                    std::begin(this->pending_end_draw), i)],
 599                 this->pending_end_draw.back());
 600       this->pending_end_draw.resize(this->pending_end_draw.size() - 1);
 601    }
 602 }
 603
 604 char const *App::api_enddraw(char const *drawing_name) {
 605    for (unsigned i = 0, iend = this->pending_end_draw.size(); i < iend; i++) {
 606       auto n = this->lookup_name(this->pending_end_draw[i]);
 607       if (n && *n == drawing_name) {
 608          std::swap(this->pending_end_draw[i], this->pending_end_draw[iend - 1]);
 609          this->pending_end_draw.resize(iend - 1);
 610          this->activate(this->pending_end_draw[i]);
 611          this->layout_commit();
 612          this->emit_flushdraw(drawing_name);
 613          return nullptr;
 614       }
 615    }
 616    return "No EndDraw pending for surface";
 617 }
 618
 619 void App::api_ping() { this->dispatch_pending_events(); }
 620
 621 /**
 622  * proxied events
 623  */
 624 void App::surface_created(uint32_t surface_id) {
 625    auto layer_id = this->layers.get_layer_id(surface_id);
 626    if (!layer_id) {
 627       HMI_DEBUG("wm", "Newly created surfce %d is not associated with any layer!",
 628                surface_id);
 629       return;
 630    }
 631
 632    HMI_DEBUG("wm", "surface_id is %u, layer_id is %u", surface_id, *layer_id);
 633
 634    this->controller->layers[*layer_id]->add_surface(
 635       this->controller->surfaces[surface_id].get());
 636
 637    // activate the main_surface right away
 638    /*if (surface_id == static_cast<unsigned>(this->layers.main_surface)) {
 639       HMI_DEBUG("wm", "Activating main_surface (%d)", surface_id);
 640
 641       this->api_activate_surface(
 642          this->lookup_name(surface_id).value_or("unknown-name").c_str());
 643    }*/
 644 }
 645
 646 void App::surface_removed(uint32_t surface_id) {
 647    HMI_DEBUG("wm", "surface_id is %u", surface_id);
 648
 649    // We cannot normally deactivate the main_surface, so be explicit
 650    // about it:
 651    if (int(surface_id) == this->layers.main_surface) {
 652       this->deactivate_main_surface();
 653    } else {
 654       auto drawing_name = this->lookup_name(surface_id);
 655       if (drawing_name) {
 656          this->api_deactivate_surface(drawing_name->c_str());
 657       }
 658    }
 659
 660    this->id_alloc.remove_id(surface_id);
 661    this->layers.remove_surface(surface_id);
 662 }
 663
 664 void App::emit_activated(char const *label) {
 665    this->api.send_event(kListEventName[Event_Active], label);
 666 }
 667
 668 void App::emit_deactivated(char const *label) {
 669    this->api.send_event(kListEventName[Event_Inactive], label);
 670 }
 671
 672 void App::emit_syncdraw(char const *label, char const *area, int x, int y, int w, int h) {
 673    this->api.send_event(kListEventName[Event_SyncDraw], label, area, x, y, w, h);
 674 }
 675
 676 void App::emit_flushdraw(char const *label) {
 677    this->api.send_event(kListEventName[Event_FlushDraw], label);
 678 }
 679
 680 void App::emit_visible(char const *label, bool is_visible) {
 681    this->api.send_event(is_visible ? kListEventName[Event_Visible] : kListEventName[Event_Invisible], label);
 682 }
 683
 684 void App::emit_invisible(char const *label) {
 685    return emit_visible(label, false);
 686 }
 687
 688 void App::emit_visible(char const *label) { return emit_visible(label, true); }
 689
 690 result<int> App::api_request_surface(char const *drawing_name) {
 691    auto lid = this->layers.get_layer_id(std::string(drawing_name));
 692    if (!lid) {
 693       // TODO: Do we need to put these applications on the App layer?
 694       return Err<int>("Drawing name does not match any role");
 695    }
 696
 697    auto rname = this->lookup_id(drawing_name);
 698    if (!rname) {
 699       // name does not exist yet, allocate surface id...
 700       auto id = int(this->id_alloc.generate_id(drawing_name));
 701       this->layers.add_surface(id, *lid);
 702
 703       // set the main_surface[_name] here and now
 704       if (!this->layers.main_surface_name.empty() &&
 705           this->layers.main_surface_name == drawing_name) {
 706          this->layers.main_surface = id;
 707          HMI_DEBUG("wm", "Set main_surface id to %u", id);
 708       }
 709
 710       return Ok<int>(id);
 711    }
 712
 713    // Check currently registered drawing names if it is already there.
 714    return Err<int>("Surface already present");
 715 }
 716
 717 result<json_object *> App::api_get_display_info() {
 718    // Check controller
 719    if (!this->controller) {
 720       return Err<json_object *>("ivi_controller global not available");
 721    }
 722
 723    // Set display info
 724    compositor::size o_size = this->controller->output_size;
 725    compositor::size p_size = this->controller->physical_size;
 726
 727    json_object *object = json_object_new_object();
 728    json_object_object_add(object, kKeyWidthPixel,  json_object_new_int(o_size.w));
 729    json_object_object_add(object, kKeyHeightPixel, json_object_new_int(o_size.h));
 730    json_object_object_add(object, kKeyWidthMm,     json_object_new_int(p_size.w));
 731    json_object_object_add(object, kKeyHeightMm,    json_object_new_int(p_size.h));
 732
 733    return Ok<json_object *>(object);
 734 }
 735
 736 result<json_object *> App::api_get_area_info(char const *drawing_name) {
 737    HMI_DEBUG("wm", "called");
 738
 739    // Check drawing name, surface/layer id
 740    auto const &surface_id = this->lookup_id(drawing_name);
 741    if (!surface_id) {
 742       return Err<json_object *>("Surface does not exist");
 743    }
 744
 745    if (!this->controller->surface_exists(*surface_id)) {
 746       return Err<json_object *>("Surface does not exist in controller!");
 747    }
 748
 749    auto layer_id = this->layers.get_layer_id(*surface_id);
 750    if (!layer_id) {
 751       return Err<json_object *>("Surface is not on any layer!");
 752    }
 753
 754    auto o_state = *this->layers.get_layout_state(*surface_id);
 755    if (o_state == nullptr) {
 756       return Err<json_object *>("Could not find layer for surface");
 757    }
 758
 759    struct LayoutState &state = *o_state;
 760    if ((state.main != *surface_id) && (state.sub != *surface_id)) {
 761       return Err<json_object *>("Surface is inactive");
 762    }
 763
 764    // Set area rectangle
 765    compositor::rect area_info = this->area_info[*surface_id];
 766    json_object *object = json_object_new_object();
 767    json_object_object_add(object, kKeyX,      json_object_new_int(area_info.x));
 768    json_object_object_add(object, kKeyY,      json_object_new_int(area_info.y));
 769    json_object_object_add(object, kKeyWidth,  json_object_new_int(area_info.w));
 770    json_object_object_add(object, kKeyHeight, json_object_new_int(area_info.h));
 771
 772    return Ok<json_object *>(object);
 773 }
 774
 775 void App::activate(int id) {
 776    auto ip = this->controller->sprops.find(id);
 777    if (ip != this->controller->sprops.end()) {
 778       this->controller->surfaces[id]->set_visibility(0);
 779       this->layout_commit();
 780       this->controller->surfaces[id]->set_visibility(1);
 781       char const *label =
 782          this->lookup_name(id).value_or("unknown-name").c_str();
 783       this->emit_visible(label);
 784       this->emit_activated(label);
 785    }
 786 }
 787
 788 void App::deactivate(int id) {
 789    auto ip = this->controller->sprops.find(id);
 790    if (ip != this->controller->sprops.end() && ip->second.visibility != 0) {
 791       this->controller->surfaces[id]->set_visibility(0);
 792       char const *label =
 793          this->lookup_name(id).value_or("unknown-name").c_str();
 794       this->emit_deactivated(label);
 795       this->emit_invisible(label);
 796    }
 797 }
 798
 799 void App::deactivate_main_surface() {
 800    this->layers.main_surface = -1;
 801    this->api_deactivate_surface(this->layers.main_surface_name.c_str());
 802 }
 803
 804 bool App::can_split(struct LayoutState const &state, int new_id) {
 805    if (state.main != -1 && state.main != new_id) {
 806       auto new_id_layer = this->layers.get_layer_id(new_id).value();
 807       auto current_id_layer = this->layers.get_layer_id(state.main).value();
 808
 809       // surfaces are on separate layers, don't bother.
 810       if (new_id_layer != current_id_layer) {
 811          return false;
 812       }
 813
 814       std::string const &new_id_str = this->lookup_name(new_id).value();
 815       std::string const &cur_id_str = this->lookup_name(state.main).value();
 816
 817       auto const &layer = this->layers.get_layer(new_id_layer);
 818
 819       HMI_DEBUG("wm", "layer info name: %s", layer->name.c_str());
 820
 821       if (layer->layouts.empty()) {
 822          return false;
 823       }
 824
 825       for (auto i = layer->layouts.cbegin(); i != layer->layouts.cend(); i++) {
 826          HMI_DEBUG("wm", "%d main_match '%s'", new_id_layer, i->main_match.c_str());
 827          auto rem = std::regex(i->main_match);
 828          if (std::regex_match(cur_id_str, rem)) {
 829             // build the second one only if the first already matched
 830             HMI_DEBUG("wm", "%d sub_match '%s'", new_id_layer, i->sub_match.c_str());
 831             auto res = std::regex(i->sub_match);
 832             if (std::regex_match(new_id_str, res)) {
 833                HMI_DEBUG("wm", "layout matched!");
 834                return true;
 835             }
 836          }
 837       }
 838    }
 839
 840    return false;
 841 }
 842
 843 void App::try_layout(struct LayoutState & /*state*/,
 844                      struct LayoutState const &new_layout,
 845                      std::function<void(LayoutState const &nl)> apply) {
 846    if (this->policy.layout_is_valid(new_layout)) {
 847       apply(new_layout);
 848    }
 849 }
 850
 851 /**
 852  * controller_hooks
 853  */
 854 void controller_hooks::surface_created(uint32_t surface_id) {
 855    this->app->surface_created(surface_id);
 856 }
 857
 858 void controller_hooks::surface_removed(uint32_t surface_id) {
 859    this->app->surface_removed(surface_id);
 860 }
 861
 862 void controller_hooks::surface_visibility(uint32_t /*surface_id*/,
 863                                           uint32_t /*v*/) {}
 864
 865 void controller_hooks::surface_destination_rectangle(uint32_t /*surface_id*/,
 866                                                      uint32_t /*x*/,
 867                                                      uint32_t /*y*/,
 868                                                      uint32_t /*w*/,
 869                                                      uint32_t /*h*/) {}
 870
 871 }  // namespace wm