src/ui/ui.cpp

   1 #include "ClientController.hpp"
   2 #include "DirectInput.hpp"
   3 #include "HUD.hpp"
   4 #include "InteractiveManipulator.hpp"
   5 #include "Interface.hpp"
   6 #include "Keymap.hpp"
   7 #include "PlayerController.hpp"
   8
   9 #include "../app/Assets.hpp"
  10 #include "../app/Config.hpp"
  11 #include "../app/Environment.hpp"
  12 #include "../app/FrameCounter.hpp"
  13 #include "../app/init.hpp"
  14 #include "../audio/Audio.hpp"
  15 #include "../graphics/Font.hpp"
  16 #include "../graphics/Viewport.hpp"
  17 #include "../io/TokenStreamReader.hpp"
  18 #include "../model/shapes.hpp"
  19 #include "../world/BlockLookup.hpp"
  20 #include "../world/World.hpp"
  21 #include "../world/WorldManipulator.hpp"
  22
  23 #include <algorithm>
  24 #include <cmath>
  25 #include <iostream>
  26 #include <map>
  27 #include <sstream>
  28 #include <glm/gtc/matrix_transform.hpp>
  29 #include <glm/gtx/rotate_vector.hpp>
  30 #include <glm/gtx/io.hpp>
  31
  32
  33 namespace blank {
  34
  35 PlayerController::PlayerController(World &world, Player &player)
  36 : world(world)
  37 , player(player)
  38 , move_dir(0.0f)
  39 , pitch(0.0f)
  40 , yaw(0.0f)
  41 , dirty(true)
  42 , aim_world()
  43 , aim_entity() {
  44
  45 }
  46
  47 void PlayerController::SetMovement(const glm::vec3 &m) noexcept {
  48         if (dot(m, m) > 1.0f) {
  49                 move_dir = normalize(m);
  50         } else {
  51                 move_dir = m;
  52         }
  53         Invalidate();
  54 }
  55
  56 void PlayerController::TurnHead(float dp, float dy) noexcept {
  57         pitch += dp;
  58         if (pitch > PI / 2) {
  59                 pitch = PI / 2;
  60         } else if (pitch < -PI / 2) {
  61                 pitch = -PI / 2;
  62         }
  63         yaw += dy;
  64         if (yaw > PI) {
  65                 yaw -= PI * 2;
  66         } else if (yaw < -PI) {
  67                 yaw += PI * 2;
  68         }
  69         Invalidate();
  70 }
  71
  72 void PlayerController::SelectInventory(int i) noexcept {
  73         player.SetInventorySlot(i);
  74 }
  75
  76 int PlayerController::InventorySlot() const noexcept {
  77         return player.GetInventorySlot();
  78 }
  79
  80 void PlayerController::Invalidate() noexcept {
  81         dirty = true;
  82 }
  83
  84 void PlayerController::UpdatePlayer() noexcept {
  85         constexpr float max_vel = 0.005f;
  86         if (dirty) {
  87                 player.GetEntity().Orientation(glm::quat(glm::vec3(pitch, yaw, 0.0f)));
  88                 player.GetEntity().Velocity(glm::rotateY(move_dir * max_vel, yaw));
  89
  90                 Ray aim = player.Aim();
  91                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity().ChunkCoords(), aim_world)) {
  92                         aim_world = WorldCollision();
  93                 }
  94                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity(), aim_entity)) {
  95                         aim_entity = EntityCollision();
  96                 }
  97                 if (aim_world && aim_entity) {
  98                         // got both, pick the closest one
  99                         if (aim_world.depth < aim_entity.depth) {
 100                                 aim_entity = EntityCollision();
 101                         } else {
 102                                 aim_world = WorldCollision();
 103                         }
 104                 }
 105                 dirty = false;
 106         }
 107 }
 108
 109
 110 DirectInput::DirectInput(World &world, Player &player, WorldManipulator &manip)
 111 : PlayerController(world, player)
 112 , manip(manip)
 113 , place_timer(256)
 114 , remove_timer(256) {
 115
 116 }
 117
 118 void DirectInput::Update(int dt) {
 119         Invalidate(); // world has changed in the meantime
 120         UpdatePlayer();
 121
 122         remove_timer.Update(dt);
 123         if (remove_timer.Hit()) {
 124                 RemoveBlock();
 125         }
 126
 127         place_timer.Update(dt);
 128         if (place_timer.Hit()) {
 129                 PlaceBlock();
 130         }
 131 }
 132
 133 void DirectInput::StartPrimaryAction() {
 134         if (!remove_timer.Running()) {
 135                 RemoveBlock();
 136                 remove_timer.Start();
 137         }
 138 }
 139
 140 void DirectInput::StopPrimaryAction() {
 141         remove_timer.Stop();
 142 }
 143
 144 void DirectInput::StartSecondaryAction() {
 145         if (!place_timer.Running()) {
 146                 PlaceBlock();
 147                 place_timer.Start();
 148         }
 149 }
 150
 151 void DirectInput::StopSecondaryAction() {
 152         place_timer.Stop();
 153 }
 154
 155 void DirectInput::StartTertiaryAction() {
 156         PickBlock();
 157 }
 158
 159 void DirectInput::StopTertiaryAction() {
 160         // nothing
 161 }
 162
 163 void DirectInput::PickBlock() {
 164         UpdatePlayer();
 165         if (!BlockFocus()) return;
 166         SelectInventory(BlockFocus().GetBlock().type - 1);
 167 }
 168
 169 void DirectInput::PlaceBlock() {
 170         UpdatePlayer();
 171         if (!BlockFocus()) return;
 172
 173         BlockLookup next_block(BlockFocus().chunk, BlockFocus().BlockPos(), Block::NormalFace(BlockFocus().normal));
 174         if (!next_block) {
 175                 return;
 176         }
 177         manip.SetBlock(next_block.GetChunk(), next_block.GetBlockIndex(), Block(InventorySlot() + 1));
 178         Invalidate();
 179 }
 180
 181 void DirectInput::RemoveBlock() {
 182         UpdatePlayer();
 183         if (!BlockFocus()) return;
 184         manip.SetBlock(BlockFocus().GetChunk(), BlockFocus().block, Block(0));
 185         Invalidate();
 186 }
 187
 188
 189 HUD::HUD(Environment &env, Config &config, const Player &player)
 190 : env(env)
 191 , config(config)
 192 , player(player)
 193 // block focus
 194 , outline()
 195 , outline_transform(1.0f)
 196 , outline_visible(false)
 197 // "inventory"
 198 , block()
 199 , block_buf()
 200 , block_transform(1.0f)
 201 , block_label()
 202 , block_visible(false)
 203 // debug overlay
 204 , counter_text()
 205 , position_text()
 206 , orientation_text()
 207 , block_text()
 208 , show_block(false)
 209 , show_entity(false)
 210 // message box
 211 , messages(env.assets.small_ui_font)
 212 , msg_timer(5000)
 213 // crosshair
 214 , crosshair() {
 215         // "inventory"
 216         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
 217         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
 218         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
 219         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
 220         block_label.Position(
 221                 glm::vec3(50.0f, 85.0f, 0.0f),
 222                 Gravity::NORTH_WEST,
 223                 Gravity::NORTH
 224         );
 225         block_label.Foreground(glm::vec4(1.0f));
 226         block_label.Background(glm::vec4(0.5f));
 227
 228         // debug overlay
 229         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 230         counter_text.Foreground(glm::vec4(1.0f));
 231         counter_text.Background(glm::vec4(0.5f));
 232         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 233         position_text.Foreground(glm::vec4(1.0f));
 234         position_text.Background(glm::vec4(0.5f));
 235         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 236         orientation_text.Foreground(glm::vec4(1.0f));
 237         orientation_text.Background(glm::vec4(0.5f));
 238         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 239         block_text.Foreground(glm::vec4(1.0f));
 240         block_text.Background(glm::vec4(0.5f));
 241         block_text.Set(env.assets.small_ui_font, "Block: none");
 242         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 243         entity_text.Foreground(glm::vec4(1.0f));
 244         entity_text.Background(glm::vec4(0.5f));
 245         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 246
 247         // message box
 248         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 249         messages.Foreground(glm::vec4(1.0f));
 250         messages.Background(glm::vec4(0.5f));
 251
 252         // crosshair
 253         OutlineModel::Buffer buf;
 254         buf.vertices = std::vector<glm::vec3>({
 255                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
 256                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
 257         });
 258         buf.indices = std::vector<OutlineModel::Index>({
 259                 0, 1, 2, 3
 260         });
 261         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f });
 262         crosshair.Update(buf);
 263 }
 264
 265 namespace {
 266
 267 OutlineModel::Buffer outl_buf;
 268
 269 }
 270
 271 void HUD::FocusBlock(const Chunk &chunk, int index) {
 272         const Block &block = chunk.BlockAt(index);
 273         const BlockType &type = chunk.Type(index);
 274         outl_buf.Clear();
 275         type.FillOutlineModel(outl_buf);
 276         outline.Update(outl_buf);
 277         outline_transform = chunk.Transform(player.GetEntity().ChunkCoords());
 278         outline_transform *= chunk.ToTransform(Chunk::ToPos(index), index);
 279         outline_transform *= glm::scale(glm::vec3(1.005f));
 280         outline_visible = true;
 281         {
 282                 std::stringstream s;
 283                 s << "Block: "
 284                         << type.label
 285                         << ", face: " << block.GetFace()
 286                         << ", turn: " << block.GetTurn();
 287                 block_text.Set(env.assets.small_ui_font, s.str());
 288         }
 289         show_block = true;
 290         show_entity = false;
 291 }
 292
 293 void HUD::FocusEntity(const Entity &entity) {
 294         {
 295                 std::stringstream s;
 296                 s << "Entity: " << entity.Name();
 297                 entity_text.Set(env.assets.small_ui_font, s.str());
 298         }
 299         show_block = false;
 300         show_entity = true;
 301 }
 302
 303 void HUD::FocusNone() {
 304         outline_visible = false;
 305         show_block = false;
 306         show_entity = false;
 307 }
 308
 309 void HUD::DisplayNone() {
 310         block_visible = false;
 311 }
 312
 313 void HUD::Display(const BlockType &type) {
 314         block_buf.Clear();
 315         type.FillEntityModel(block_buf);
 316         block.Update(block_buf);
 317
 318         block_label.Set(env.assets.small_ui_font, type.label);
 319
 320         block_visible = type.visible;
 321 }
 322
 323
 324 void HUD::UpdateDebug() {
 325         UpdateCounter();
 326         UpdatePosition();
 327         UpdateOrientation();
 328 }
 329
 330 void HUD::UpdateCounter() {
 331         std::stringstream s;
 332         s << std::setprecision(3) <<
 333                 "avg: " << env.counter.Average().running << "ms, "
 334                 "peak: " << env.counter.Peak().running << "ms";
 335         std::string text = s.str();
 336         counter_text.Set(env.assets.small_ui_font, text);
 337 }
 338
 339 void HUD::UpdatePosition() {
 340         std::stringstream s;
 341         s << std::setprecision(3) << "pos: " << player.GetEntity().AbsolutePosition();
 342         position_text.Set(env.assets.small_ui_font, s.str());
 343 }
 344
 345 void HUD::UpdateOrientation() {
 346         //std::stringstream s;
 347         //s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 348         //      << ", yaw: " << rad2deg(ctrl.Yaw());
 349         //orientation_text.Set(env.assets.small_ui_font, s.str());
 350 }
 351
 352 void HUD::PostMessage(const char *msg) {
 353         messages.PushLine(msg);
 354         msg_timer.Reset();
 355         msg_timer.Start();
 356         std::cout << msg << std::endl;
 357 }
 358
 359
 360 void HUD::Update(int dt) {
 361         msg_timer.Update(dt);
 362         if (msg_timer.HitOnce()) {
 363                 msg_timer.Stop();
 364         }
 365
 366         if (config.video.debug) {
 367                 if (env.counter.Changed()) {
 368                         UpdateCounter();
 369                 }
 370                 UpdatePosition();
 371                 UpdateOrientation();
 372         }
 373 }
 374
 375 void HUD::Render(Viewport &viewport) noexcept {
 376         // block focus
 377         if (outline_visible && config.video.world) {
 378                 PlainColor &outline_prog = viewport.WorldOutlineProgram();
 379                 outline_prog.SetM(outline_transform);
 380                 outline.Draw();
 381         }
 382
 383         // clear depth buffer so everything renders above the world
 384         viewport.ClearDepth();
 385
 386         if (config.video.hud) {
 387                 // "inventory"
 388                 if (block_visible) {
 389                         DirectionalLighting &world_prog = viewport.HUDProgram();
 390                         world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
 391                         // disable distance fog
 392                         world_prog.SetFogDensity(0.0f);
 393
 394                         viewport.DisableBlending();
 395                         world_prog.SetM(block_transform);
 396                         block.Draw();
 397                         block_label.Render(viewport);
 398                 }
 399
 400                 // message box
 401                 if (msg_timer.Running()) {
 402                         messages.Render(viewport);
 403                 }
 404
 405                 // crosshair
 406                 PlainColor &outline_prog = viewport.HUDOutlineProgram();
 407                 viewport.EnableInvertBlending();
 408                 viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
 409                 outline_prog.SetM(viewport.Cursor());
 410                 crosshair.Draw();
 411         }
 412
 413         // debug overlay
 414         if (config.video.debug) {
 415                 counter_text.Render(viewport);
 416                 position_text.Render(viewport);
 417                 orientation_text.Render(viewport);
 418                 if (show_block) {
 419                         block_text.Render(viewport);
 420                 } else if (show_entity) {
 421                         entity_text.Render(viewport);
 422                 }
 423         }
 424 }
 425
 426
 427 InteractiveManipulator::InteractiveManipulator(Environment &env, Entity &player)
 428 : player(player)
 429 , audio(env.audio)
 430 , place_sound(env.loader.LoadSound("thump"))
 431 , remove_sound(env.loader.LoadSound("plop")) {
 432
 433 }
 434
 435 void InteractiveManipulator::SetBlock(Chunk &chunk, int index, const Block &block) {
 436         chunk.SetBlock(index, block);
 437         glm::vec3 coords = chunk.ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(index));
 438         // TODO: get sound effect from block type
 439         if (block.type == 0) {
 440                 audio.Play(remove_sound, coords);
 441         } else {
 442                 audio.Play(place_sound, coords);
 443         }
 444 }
 445
 446
 447 Interface::Interface(
 448         Config &config,
 449         const Keymap &keymap,
 450         PlayerController &pc,
 451         ClientController &cc)
 452 : config(config)
 453 , keymap(keymap)
 454 , player_ctrl(pc)
 455 , client_ctrl(cc)
 456 , fwd(0)
 457 , rev(0)
 458 , slot(0)
 459 , num_slots(10) {
 460
 461 }
 462
 463
 464 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 465         if (!config.input.keyboard) return;
 466
 467         Keymap::Action action = keymap.Lookup(event);
 468         switch (action) {
 469                 case Keymap::MOVE_FORWARD:
 470                         rev.z = 1;
 471                         UpdateMovement();
 472                         break;
 473                 case Keymap::MOVE_BACKWARD:
 474                         fwd.z = 1;
 475                         UpdateMovement();
 476                         break;
 477                 case Keymap::MOVE_LEFT:
 478                         rev.x = 1;
 479                         UpdateMovement();
 480                         break;
 481                 case Keymap::MOVE_RIGHT:
 482                         fwd.x = 1;
 483                         UpdateMovement();
 484                         break;
 485                 case Keymap::MOVE_UP:
 486                         fwd.y = 1;
 487                         UpdateMovement();
 488                         break;
 489                 case Keymap::MOVE_DOWN:
 490                         rev.y = 1;
 491                         UpdateMovement();
 492                         break;
 493
 494                 case Keymap::PRIMARY:
 495                         player_ctrl.StartPrimaryAction();
 496                         break;
 497                 case Keymap::SECONDARY:
 498                         player_ctrl.StartSecondaryAction();
 499                         break;
 500                 case Keymap::TERTIARY:
 501                         player_ctrl.StartTertiaryAction();
 502                         break;
 503
 504                 case Keymap::INV_NEXT:
 505                         InvRel(1);
 506                         break;
 507                 case Keymap::INV_PREVIOUS:
 508                         InvRel(-1);
 509                         break;
 510                 case Keymap::INV_1:
 511                 case Keymap::INV_2:
 512                 case Keymap::INV_3:
 513                 case Keymap::INV_4:
 514                 case Keymap::INV_5:
 515                 case Keymap::INV_6:
 516                 case Keymap::INV_7:
 517                 case Keymap::INV_8:
 518                 case Keymap::INV_9:
 519                 case Keymap::INV_10:
 520                         InvAbs(action - Keymap::INV_1);
 521                         break;
 522
 523                 case Keymap::EXIT:
 524                         client_ctrl.Exit();
 525                         break;
 526
 527                 case Keymap::TOGGLE_AUDIO:
 528                         config.audio.enabled = !config.audio.enabled;
 529                         client_ctrl.SetAudio(config.audio.enabled);
 530                         break;
 531                 case Keymap::TOGGLE_VIDEO:
 532                         config.video.world = !config.video.world;
 533                         client_ctrl.SetVideo(config.video.world);
 534                         break;
 535                 case Keymap::TOGGLE_HUD:
 536                         config.video.hud = !config.video.hud;
 537                         client_ctrl.SetHUD(config.video.hud);
 538                         break;
 539                 case Keymap::TOGGLE_DEBUG:
 540                         config.video.debug = !config.video.debug;
 541                         client_ctrl.SetDebug(config.video.debug);
 542                         break;
 543
 544                 default:
 545                         break;
 546         }
 547 }
 548
 549 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 550         if (!config.input.keyboard) return;
 551
 552         switch (keymap.Lookup(event)) {
 553                 case Keymap::MOVE_FORWARD:
 554                         rev.z = 0;
 555                         UpdateMovement();
 556                         break;
 557                 case Keymap::MOVE_BACKWARD:
 558                         fwd.z = 0;
 559                         UpdateMovement();
 560                         break;
 561                 case Keymap::MOVE_LEFT:
 562                         rev.x = 0;
 563                         UpdateMovement();
 564                         break;
 565                 case Keymap::MOVE_RIGHT:
 566                         fwd.x = 0;
 567                         UpdateMovement();
 568                         break;
 569                 case Keymap::MOVE_UP:
 570                         fwd.y = 0;
 571                         UpdateMovement();
 572                         break;
 573                 case Keymap::MOVE_DOWN:
 574                         rev.y = 0;
 575                         UpdateMovement();
 576                         break;
 577
 578                 case Keymap::PRIMARY:
 579                         player_ctrl.StopPrimaryAction();
 580                         break;
 581                 case Keymap::SECONDARY:
 582                         player_ctrl.StopSecondaryAction();
 583                         break;
 584                 case Keymap::TERTIARY:
 585                         player_ctrl.StopTertiaryAction();
 586                         break;
 587
 588                 default:
 589                         break;
 590         }
 591 }
 592
 593 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 594         if (!config.input.mouse) return;
 595         player_ctrl.TurnHead(
 596                 event.yrel * config.input.pitch_sensitivity,
 597                 event.xrel * config.input.yaw_sensitivity);
 598 }
 599
 600 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 601         if (!config.input.mouse) return;
 602
 603         switch (event.button) {
 604                 case SDL_BUTTON_LEFT:
 605                         player_ctrl.StartPrimaryAction();
 606                         break;
 607                 case SDL_BUTTON_RIGHT:
 608                         player_ctrl.StartSecondaryAction();
 609                         break;
 610                 case SDL_BUTTON_MIDDLE:
 611                         player_ctrl.StartTertiaryAction();
 612                         break;
 613         }
 614 }
 615
 616 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 617         if (!config.input.mouse) return;
 618
 619         switch (event.button) {
 620                 case SDL_BUTTON_LEFT:
 621                         player_ctrl.StopPrimaryAction();
 622                         break;
 623                 case SDL_BUTTON_RIGHT:
 624                         player_ctrl.StopSecondaryAction();
 625                         break;
 626                 case SDL_BUTTON_MIDDLE:
 627                         player_ctrl.StopTertiaryAction();
 628                         break;
 629         }
 630 }
 631
 632
 633 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 634         if (!config.input.mouse) return;
 635
 636         if (event.y < 0) {
 637                 InvRel(1);
 638         } else if (event.y > 0) {
 639                 InvRel(-1);
 640         }
 641 }
 642
 643 void Interface::UpdateMovement() {
 644         player_ctrl.SetMovement(glm::vec3(fwd - rev));
 645 }
 646
 647 void Interface::InvAbs(int s) {
 648         slot = s % num_slots;
 649         while (slot < 0) {
 650                 slot += num_slots;
 651         }
 652         player_ctrl.SelectInventory(slot);
 653 }
 654
 655 void Interface::InvRel(int delta) {
 656         InvAbs(slot + delta);
 657 }
 658
 659
 660 Keymap::Keymap()
 661 : codemap{ NONE } {
 662
 663 }
 664
 665 void Keymap::Map(SDL_Scancode scancode, Action action) {
 666         if (scancode > MAX_SCANCODE) {
 667                 throw std::runtime_error("refusing to map scancode: too damn high");
 668         }
 669         codemap[scancode] = action;
 670 }
 671
 672 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) const {
 673         if (scancode < NUM_SCANCODES) {
 674                 return codemap[scancode];
 675         } else {
 676                 return NONE;
 677         }
 678 }
 679
 680
 681 void Keymap::LoadDefault() {
 682         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 683         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 684         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 685         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 686         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 687         Map(SDL_SCANCODE_A, MOVE_LEFT);
 688         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 689         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 690         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 691         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 692         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 693         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 694         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 695
 696         Map(SDL_SCANCODE_TAB, INV_NEXT);
 697         Map(SDL_SCANCODE_RIGHTBRACKET, INV_NEXT);
 698         Map(SDL_SCANCODE_LEFTBRACKET, INV_PREVIOUS);
 699         Map(SDL_SCANCODE_1, INV_1);
 700         Map(SDL_SCANCODE_2, INV_2);
 701         Map(SDL_SCANCODE_3, INV_3);
 702         Map(SDL_SCANCODE_4, INV_4);
 703         Map(SDL_SCANCODE_5, INV_5);
 704         Map(SDL_SCANCODE_6, INV_6);
 705         Map(SDL_SCANCODE_7, INV_7);
 706         Map(SDL_SCANCODE_8, INV_8);
 707         Map(SDL_SCANCODE_9, INV_9);
 708         Map(SDL_SCANCODE_0, INV_10);
 709
 710         Map(SDL_SCANCODE_INSERT, SECONDARY);
 711         Map(SDL_SCANCODE_RETURN, SECONDARY);
 712         Map(SDL_SCANCODE_MENU, TERTIARY);
 713         Map(SDL_SCANCODE_DELETE, PRIMARY);
 714         Map(SDL_SCANCODE_BACKSPACE, PRIMARY);
 715
 716         Map(SDL_SCANCODE_F1, TOGGLE_HUD);
 717         Map(SDL_SCANCODE_F2, TOGGLE_VIDEO);
 718         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 719         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 720
 721         Map(SDL_SCANCODE_ESCAPE, EXIT);
 722 }
 723
 724
 725 void Keymap::Load(std::istream &is) {
 726         TokenStreamReader in(is);
 727         std::string key_name;
 728         std::string action_name;
 729         SDL_Scancode key;
 730         Action action;
 731         while (in.HasMore()) {
 732                 if (in.Peek().type == Token::STRING) {
 733                         in.ReadString(key_name);
 734                         key = SDL_GetScancodeFromName(key_name.c_str());
 735                 } else {
 736                         key = SDL_Scancode(in.GetInt());
 737                 }
 738                 in.Skip(Token::EQUALS);
 739                 in.ReadIdentifier(action_name);
 740                 action = StringToAction(action_name);
 741                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 742                         in.Skip(Token::SEMICOLON);
 743                 }
 744                 Map(key, action);
 745         }
 746 }
 747
 748 void Keymap::Save(std::ostream &out) {
 749         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 750                 if (codemap[i] == NONE) continue;
 751
 752                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 753                 if (str && *str) {
 754                         out << '"';
 755                         while (*str) {
 756                                 if (*str == '"') {
 757                                         out << "\\\"";
 758                                 } else {
 759                                         out << *str;
 760                                 }
 761                                 ++str;
 762                         }
 763                         out << '"';
 764                 } else {
 765                         out << i;
 766                 }
 767
 768                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 769         }
 770 }
 771
 772
 773 namespace {
 774
 775 std::map<std::string, Keymap::Action> action_map = {
 776         { "none", Keymap::NONE },
 777         { "move_forward", Keymap::MOVE_FORWARD },
 778         { "move_backward", Keymap::MOVE_BACKWARD },
 779         { "move_left", Keymap::MOVE_LEFT },
 780         { "move_right", Keymap::MOVE_RIGHT },
 781         { "move_up", Keymap::MOVE_UP },
 782         { "move_down", Keymap::MOVE_DOWN },
 783
 784         { "primary", Keymap::PRIMARY },
 785         { "secondary", Keymap::SECONDARY },
 786         { "tertiary", Keymap::TERTIARY },
 787
 788         { "inventory_next", Keymap::INV_NEXT },
 789         { "inventory_prev", Keymap::INV_PREVIOUS },
 790         { "inventory_1", Keymap::INV_1 },
 791         { "inventory_2", Keymap::INV_2 },
 792         { "inventory_3", Keymap::INV_3 },
 793         { "inventory_4", Keymap::INV_4 },
 794         { "inventory_5", Keymap::INV_5 },
 795         { "inventory_6", Keymap::INV_6 },
 796         { "inventory_7", Keymap::INV_7 },
 797         { "inventory_8", Keymap::INV_8 },
 798         { "inventory_9", Keymap::INV_9 },
 799         { "inventory_10", Keymap::INV_10 },
 800
 801         { "toggle_audio", Keymap::TOGGLE_AUDIO },
 802         { "toggle_video", Keymap::TOGGLE_VIDEO },
 803         { "toggle_hud", Keymap::TOGGLE_HUD },
 804         { "toggle_debug", Keymap::TOGGLE_DEBUG },
 805
 806         { "exit", Keymap::EXIT },
 807 };
 808
 809 }
 810
 811 const char *Keymap::ActionToString(Action action) {
 812         for (const auto &entry : action_map) {
 813                 if (action == entry.second) {
 814                         return entry.first.c_str();
 815                 }
 816         }
 817         return "none";
 818 }
 819
 820 Keymap::Action Keymap::StringToAction(const std::string &str) {
 821         auto entry = action_map.find(str);
 822         if (entry != action_map.end()) {
 823                 return entry->second;
 824         } else {
 825                 std::cerr << "unknown action \"" << str << '"' << std::endl;
 826                 return NONE;
 827         }
 828 }
 829
 830 }