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React from \"react\";\n\nconst config = {\n ROMS: {\n NesTest: {\n name: \"LD44\",\n description: \"LD44 - The life of Cirkat\",\n url: \"http://cloud.weirdfox.com/GameJam/LD44.nes\"\n }\n }\n};\n\nexport default config;","const pFileReader = function(file) {\n return new Promise((resolve, reject) => {\n var reader = new FileReader();\n reader.onload = resolve;\n reader.readAsBinaryString(file);\n });\n};\n\nconst hashFile = function(byteString) {\n const asHex = buffer => {\n return Array.from(new Uint8Array(buffer))\n .map(b => b.toString(16).padStart(2, \"0\"))\n .join(\"\");\n };\n\n const ab = new ArrayBuffer(byteString.length);\n var ia = new Uint8Array(ab);\n\n for (var i = 0; i < byteString.length; i++) {\n ia[i] = byteString.charCodeAt(i);\n }\n\n return crypto.subtle.digest(\"SHA-1\", ab).then(asHex);\n};\n\nconst RomLibrary = {\n getRomInfoByHash: function(hash) {\n return this.load().find(rom => rom.hash === hash);\n },\n save: function(file) {\n return pFileReader(file)\n .then(function(readFile) {\n const byteString = readFile.target.result;\n return hashFile(byteString).then(hash => {\n return { hash, byteString };\n });\n })\n .then(({ hash, byteString }) => {\n const savedRomInfo = localStorage.getItem(\"savedRomInfo\");\n const existingLibrary = savedRomInfo ? JSON.parse(savedRomInfo) : [];\n\n const rom = {\n name: file.name,\n hash: hash,\n added: Date.now()\n };\n\n const newRomInfo = JSON.stringify(existingLibrary.concat([rom]));\n\n localStorage.setItem(\"savedRomInfo\", newRomInfo);\n localStorage.setItem(\"blob-\" + hash, byteString);\n\n return rom;\n });\n },\n load: function() {\n const localData = localStorage.getItem(\"savedRomInfo\");\n if (!localData) return [];\n const savedRomInfo = JSON.parse(localStorage.getItem(\"savedRomInfo\"));\n return savedRomInfo || [];\n },\n delete: function(hash) {\n const existingLibrary = this.load();\n localStorage.removeItem(\"blob-\" + hash);\n localStorage.setItem(\n \"savedRomInfo\",\n JSON.stringify(existingLibrary.filter(rom => rom.hash !== hash))\n );\n }\n};\n\nexport default RomLibrary;\n","import React, { Component } from \"react\";\nimport \"./ListPage.css\";\nimport { ListGroup, Button } from \"reactstrap\";\nimport { Link } from \"react-router-dom\";\nimport config from \"./config\";\n\nimport RomLibrary from \"./RomLibrary\";\n\nclass ListPage extends Component {\n constructor(props) {\n super(props);\n this.state = {\n romLibrary: RomLibrary.load()\n };\n }\n render() {\n return (\n \n
\n
\n
\n

JSNES

\n

\n A JavaScript NES emulator.{\" \"}\n Source on GitHub.\n

\n
\n\n \n {Object.keys(config.ROMS)\n .sort()\n .map(key => (\n \n {config.ROMS[key][\"name\"]}\n ›\n \n ))}\n \n\n {this.state.romLibrary.length > 0 ? (\n
\n

Previously played:

\n\n \n {this.state.romLibrary\n .sort((a, b) => new Date(b.added) - new Date(a.added))\n .map(rom => (\n \n {rom.name}\n {\n e.preventDefault();\n this.deleteRom(rom.hash);\n }}\n className=\"delete\"\n title=\"Delete\"\n >\n ×\n \n ›\n \n ))}\n \n
\n ) : null}\n
\n
\n \n );\n }\n\n deleteRom = hash => {\n RomLibrary.delete(hash);\n this.updateLibrary();\n };\n\n updateLibrary = () => {\n this.setState({ romLibrary: RomLibrary.load() });\n };\n\n handleDragOver = e => {\n e.preventDefault();\n e.dataTransfer.dropEffect = \"copy\";\n };\n\n handleDrop = e => {\n e.preventDefault();\n\n const file = e.dataTransfer.items\n ? e.dataTransfer.items[0].getAsFile()\n : e.dataTransfer.files[0];\n\n RomLibrary.save(file).then(rom => {\n this.updateLibrary();\n this.props.history.push({ pathname: \"run/local-\" + rom.hash });\n });\n };\n}\n\nexport default ListPage;\n","import React, { Component } from \"react\";\n\nclass ControlMapperRow extends Component {\n constructor(props) {\n super(props);\n this.state = {\n playerOneButton: \"\",\n playerTwoButton: \"\",\n waitingForKey: 0\n };\n this.handleClick = this.handleClick.bind(this);\n }\n\n componentDidMount() {\n var keys = this.props.keys;\n var button = this.props.button;\n var playerButtons = [];\n for (var key in keys) {\n if (keys[key][0] === 1 && keys[key][1] === button) {\n playerButtons[0] = keys[key][2];\n console.log(playerButtons[0]);\n } else if (keys[key][0] === 2 && keys[key][1] === button) {\n playerButtons[1] = keys[key][2];\n }\n }\n this.setState({\n playerOneButton: playerButtons[0],\n playerTwoButton: playerButtons[1]\n });\n }\n\n componentDidUpdate(prevProps, prevState) {\n var keys = this.props.keys;\n var button = this.props.button;\n var playerButtons = [];\n var gamepadButton;\n var newButton;\n\n for (var key in keys) {\n if (keys[key][0] === 1 && keys[key][1] === button) {\n playerButtons[0] = keys[key][2];\n console.log(playerButtons[0]);\n } else if (keys[key][0] === 2 && keys[key][1] === button) {\n playerButtons[1] = keys[key][2];\n }\n }\n\n var searchButton = (gamepadConfig, buttonId) => {\n return gamepadConfig.buttons.filter(b => b.buttonId === buttonId)[0];\n };\n\n var searchNewButton = (prevGamepadConfig, gamepadConfig) => {\n return gamepadConfig.buttons.filter(b => {\n return (\n !prevGamepadConfig ||\n !prevGamepadConfig.buttons.some(b2 => b2.buttonId === b.buttonId)\n );\n })[0];\n };\n\n var waitingForKey = 0;\n var waitingForKeyPlayer = 0;\n\n var gamepadButtonName = gamepadButton => {\n if (gamepadButton.type === \"button\") return \"Btn-\" + gamepadButton.code;\n if (gamepadButton.type === \"axis\")\n return \"Axis-\" + gamepadButton.code + \" \" + gamepadButton.value;\n };\n\n if (this.props.gamepadConfig && this.props.gamepadConfig.playerGamepadId) {\n const playerGamepadId = this.props.gamepadConfig.playerGamepadId;\n if (playerGamepadId[0]) {\n playerButtons[0] = \"\";\n gamepadButton = searchButton(\n this.props.gamepadConfig.configs[playerGamepadId[0]],\n button\n );\n newButton = searchNewButton(\n prevProps.gamepadConfig.configs[playerGamepadId[0]],\n this.props.gamepadConfig.configs[playerGamepadId[0]]\n );\n if (gamepadButton) {\n playerButtons[0] = gamepadButtonName(gamepadButton);\n } else {\n if (newButton && newButton.buttonId === this.props.prevButton) {\n if (!waitingForKey) {\n waitingForKey = 1;\n waitingForKeyPlayer = 1;\n }\n }\n }\n }\n\n if (playerGamepadId[1]) {\n playerButtons[1] = \"\";\n gamepadButton = searchButton(\n this.props.gamepadConfig.configs[playerGamepadId[1]],\n button\n );\n newButton = searchNewButton(\n prevProps.gamepadConfig.configs[playerGamepadId[1]],\n this.props.gamepadConfig.configs[playerGamepadId[1]]\n );\n if (gamepadButton) {\n playerButtons[1] = gamepadButtonName(gamepadButton);\n } else {\n if (newButton && newButton.buttonId === this.props.prevButton) {\n if (!waitingForKey) {\n waitingForKey = 2;\n waitingForKeyPlayer = 2;\n }\n }\n }\n }\n }\n\n var newState = {};\n\n if (waitingForKey) {\n this.props.handleClick([waitingForKeyPlayer, this.props.button]);\n }\n // Prevent setState being called repeatedly\n if (\n prevState.playerOneButton !== playerButtons[0] ||\n prevState.playerTwoButton !== playerButtons[1]\n ) {\n newState.playerOneButton = playerButtons[0];\n newState.playerTwoButton = playerButtons[1];\n }\n\n if (waitingForKey) {\n newState.waitingForKey = waitingForKey;\n } else if (prevState.waitingForKey === 1) {\n if (this.props.currentPromptButton !== this.props.button) {\n newState.waitingForKey = 0;\n }\n } else if (prevState.waitingForKey === 2) {\n if (this.props.currentPromptButton !== this.props.button) {\n newState.waitingForKey = 0;\n }\n }\n\n if (Object.keys(newState).length > 0) {\n this.setState(newState);\n }\n }\n\n handleClick(player) {\n this.props.handleClick([player, this.props.button]);\n this.setState({\n waitingForKey: player\n });\n }\n\n render() {\n const waitingText = \"Press key or button...\";\n return (\n \n {this.props.buttonName}\n this.handleClick(1)}>\n {this.state.waitingForKey === 1\n ? waitingText\n : this.state.playerOneButton}\n \n this.handleClick(2)}>\n {this.state.waitingForKey === 2\n ? waitingText\n : this.state.playerTwoButton}\n \n \n );\n }\n}\n\nexport default ControlMapperRow;\n","import React, { Component } from \"react\";\nimport {\n Button,\n Modal,\n ModalHeader,\n ModalBody,\n ModalFooter,\n Table\n} from \"reactstrap\";\nimport { Controller } from \"jsnes\";\nimport ControlMapperRow from \"./ControlMapperRow\";\n\nconst GAMEPAD_ICON = \"../img/nes_controller.png\";\nconst KEYBOARD_ICON = \"../img/keyboard.png\";\n\nclass ControlsModal extends Component {\n constructor(props) {\n super(props);\n this.state = {\n gamepadConfig: props.gamepadConfig,\n keys: props.keys,\n button: undefined,\n modified: false\n };\n this.handleKeyDown = this.handleKeyDown.bind(this);\n this.handleGamepadButtonDown = this.handleGamepadButtonDown.bind(this);\n this.listenForKey = this.listenForKey.bind(this);\n\n this.state.gamepadConfig = this.state.gamepadConfig || {};\n this.state.gamepadConfig.playerGamepadId = this.state.gamepadConfig\n .playerGamepadId || [null, null];\n this.state.gamepadConfig.configs = this.state.gamepadConfig.configs || {};\n\n this.state.controllerIcon = this.state.gamepadConfig.playerGamepadId.map(\n gamepadId => (gamepadId ? GAMEPAD_ICON : KEYBOARD_ICON)\n );\n this.state.controllerIconAlt = this.state.gamepadConfig.playerGamepadId.map(\n gamepadId => (gamepadId ? \"gamepad\" : \"keyboard\")\n );\n this.state.currentPromptButton = -1;\n }\n\n componentWillUnmount() {\n if (this.state.modified) {\n this.props.setKeys(this.state.keys);\n this.props.setGamepadConfig(this.state.gamepadConfig);\n }\n this.removeKeyListener();\n }\n\n listenForKey(button) {\n var currentPromptButton = button[1];\n\n this.removeKeyListener();\n this.setState({ button, currentPromptButton });\n this.props.promptButton(this.handleGamepadButtonDown);\n document.addEventListener(\"keydown\", this.handleKeyDown);\n }\n\n handleGamepadButtonDown(buttonInfo) {\n this.removeKeyListener();\n\n var button = this.state.button;\n\n const playerId = button[0];\n const buttonId = button[1];\n\n const gamepadId = buttonInfo.gamepadId;\n const gamepadConfig = this.state.gamepadConfig;\n\n // link player to gamepad\n const playerGamepadId = gamepadConfig.playerGamepadId.slice(0);\n const newConfig = {};\n\n playerGamepadId[playerId - 1] = gamepadId;\n\n const rejectButtonId = b => {\n return b.buttonId !== buttonId;\n };\n\n const newButton = {\n code: buttonInfo.code,\n type: buttonInfo.type,\n buttonId: buttonId,\n value: buttonInfo.value\n };\n newConfig[gamepadId] = {\n buttons: (gamepadConfig.configs[gamepadId] || { buttons: [] }).buttons\n .filter(rejectButtonId)\n .concat([newButton])\n };\n\n const configs = Object.assign({}, gamepadConfig.configs, newConfig);\n\n this.setState({\n gamepadConfig: {\n configs: configs,\n playerGamepadId: playerGamepadId\n },\n currentPromptButton: -1,\n controllerIcon: playerGamepadId.map(gamepadId =>\n gamepadId ? GAMEPAD_ICON : KEYBOARD_ICON\n ),\n modified: true\n });\n }\n\n handleKeyDown(event) {\n this.removeKeyListener();\n\n var button = this.state.button;\n var keys = this.state.keys;\n var newKeys = {};\n for (var key in keys) {\n if (keys[key][0] !== button[0] || keys[key][1] !== button[1]) {\n newKeys[key] = keys[key];\n }\n }\n\n const playerGamepadId = this.state.gamepadConfig.playerGamepadId.slice(0);\n const playerId = button[0];\n playerGamepadId[playerId - 1] = null;\n\n this.setState({\n keys: {\n ...newKeys,\n [event.keyCode]: [\n ...button.slice(0, 2),\n event.key.length > 1 ? event.key : String(event.key).toUpperCase()\n ]\n },\n button: undefined,\n gamepadConfig: {\n configs: this.state.gamepadConfig.configs,\n playerGamepadId: playerGamepadId\n },\n currentPromptButton: -1,\n controllerIcon: playerGamepadId.map(gamepadId =>\n gamepadId ? GAMEPAD_ICON : KEYBOARD_ICON\n ),\n controllerIconAlt: playerGamepadId.map(gamepadId =>\n gamepadId ? \"gamepad\" : \"keyboard\"\n ),\n modified: true\n });\n }\n\n removeKeyListener() {\n this.props.promptButton(null);\n document.removeEventListener(\"keydown\", this.handleKeyDown);\n }\n\n render() {\n return (\n \n Controls\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
Button\n Player 1\n \n \n Player 2\n \n
\n \n \n \n \n \n );\n }\n}\n\nexport default ControlsModal;\n","const FPS = 60.098;\n\nexport default class FrameTimer {\n constructor(props) {\n // Run at 60 FPS\n this.onGenerateFrame = props.onGenerateFrame;\n // Run on animation frame\n this.onWriteFrame = props.onWriteFrame;\n this.onAnimationFrame = this.onAnimationFrame.bind(this);\n this.running = true;\n this.interval = 1e3 / FPS;\n this.lastFrameTime = false;\n }\n\n start() {\n this.running = true;\n this.requestAnimationFrame();\n }\n\n stop() {\n this.running = false;\n if (this._requestID) window.cancelAnimationFrame(this._requestID);\n this.lastFrameTime = false;\n }\n\n requestAnimationFrame() {\n this._requestID = window.requestAnimationFrame(this.onAnimationFrame);\n }\n\n generateFrame() {\n this.onGenerateFrame();\n this.lastFrameTime += this.interval;\n }\n\n onAnimationFrame = time => {\n this.requestAnimationFrame();\n // how many ms after 60fps frame time\n let excess = time % this.interval;\n\n // newFrameTime is the current time aligned to 60fps intervals.\n // i.e. 16.6, 33.3, etc ...\n let newFrameTime = time - excess;\n\n // first frame, do nothing\n if (!this.lastFrameTime) {\n this.lastFrameTime = newFrameTime;\n return;\n }\n\n let numFrames = Math.round(\n (newFrameTime - this.lastFrameTime) / this.interval\n );\n\n // This can happen a lot on a 144Hz display\n if (numFrames === 0) {\n //console.log(\"WOAH, no frames\");\n return;\n }\n\n // update display on first frame only\n this.generateFrame();\n this.onWriteFrame();\n\n // we generate additional frames evenly before the next\n // onAnimationFrame call.\n // additional frames are generated but not displayed\n // until next frame draw\n let timeToNextFrame = this.interval - excess;\n for (let i = 1; i < numFrames; i++) {\n setTimeout(() => {\n this.generateFrame();\n }, (i * timeToNextFrame) / numFrames);\n }\n if (numFrames > 1) console.log(\"SKIP\", numFrames - 1, this.lastFrameTime);\n };\n}\n","export default class GamepadController {\n constructor(options) {\n this.onButtonDown = options.onButtonDown;\n this.onButtonUp = options.onButtonUp;\n this.gamepadState = [];\n this.buttonCallback = null;\n }\n\n disableIfGamepadEnabled = callback => {\n var self = this;\n return (playerId, buttonId) => {\n if (!self.gamepadConfig) {\n return callback(playerId, buttonId);\n }\n\n var playerGamepadId = self.gamepadConfig.playerGamepadId;\n if (!playerGamepadId || !playerGamepadId[playerId - 1]) {\n // allow callback only if player is not associated to any gamepad\n return callback(playerId, buttonId);\n }\n };\n };\n\n _getPlayerNumberFromGamepad = gamepad => {\n if (this.gamepadConfig.playerGamepadId[0] === gamepad.id) {\n return 1;\n }\n\n if (this.gamepadConfig.playerGamepadId[1] === gamepad.id) {\n return 2;\n }\n\n return 1;\n };\n\n poll = () => {\n const gamepads = navigator.getGamepads\n ? navigator.getGamepads()\n : navigator.webkitGetGamepads();\n\n const usedPlayers = [];\n\n for (let gamepadIndex = 0; gamepadIndex < gamepads.length; gamepadIndex++) {\n const gamepad = gamepads[gamepadIndex];\n const previousGamepad = this.gamepadState[gamepadIndex];\n\n if (!gamepad) {\n continue;\n }\n\n if (!previousGamepad) {\n this.gamepadState[gamepadIndex] = gamepad;\n continue;\n }\n\n const buttons = gamepad.buttons;\n const previousButtons = previousGamepad.buttons;\n\n if (this.buttonCallback) {\n for (let code = 0; code < gamepad.axes.length; code++) {\n const axis = gamepad.axes[code];\n const previousAxis = previousGamepad.axes[code];\n\n if (axis === -1 && previousAxis !== -1) {\n this.buttonCallback({\n gamepadId: gamepad.id,\n type: \"axis\",\n code: code,\n value: axis\n });\n }\n\n if (axis === 1 && previousAxis !== 1) {\n this.buttonCallback({\n gamepadId: gamepad.id,\n type: \"axis\",\n code: code,\n value: axis\n });\n }\n }\n\n for (let code = 0; code < buttons.length; code++) {\n const button = buttons[code];\n const previousButton = previousButtons[code];\n if (button.pressed && !previousButton.pressed) {\n this.buttonCallback({\n gamepadId: gamepad.id,\n type: \"button\",\n code: code\n });\n }\n }\n } else if (this.gamepadConfig) {\n let playerNumber = this._getPlayerNumberFromGamepad(gamepad);\n if (usedPlayers.length < 2) {\n if (usedPlayers.indexOf(playerNumber) !== -1) {\n playerNumber++;\n if (playerNumber > 2) playerNumber = 1;\n }\n usedPlayers.push(playerNumber);\n\n if (this.gamepadConfig.configs[gamepad.id]) {\n const configButtons = this.gamepadConfig.configs[gamepad.id]\n .buttons;\n\n for (let i = 0; i < configButtons.length; i++) {\n const configButton = configButtons[i];\n if (configButton.type === \"button\") {\n const code = configButton.code;\n const button = buttons[code];\n const previousButton = previousButtons[code];\n\n if (button.pressed && !previousButton.pressed) {\n this.onButtonDown(playerNumber, configButton.buttonId);\n } else if (!button.pressed && previousButton.pressed) {\n this.onButtonUp(playerNumber, configButton.buttonId);\n }\n } else if (configButton.type === \"axis\") {\n const code = configButton.code;\n const axis = gamepad.axes[code];\n const previousAxis = previousGamepad.axes[code];\n\n if (\n axis === configButton.value &&\n previousAxis !== configButton.value\n ) {\n this.onButtonDown(playerNumber, configButton.buttonId);\n }\n\n if (\n axis !== configButton.value &&\n previousAxis === configButton.value\n ) {\n this.onButtonUp(playerNumber, configButton.buttonId);\n }\n }\n }\n }\n }\n }\n\n this.gamepadState[gamepadIndex] = {\n buttons: buttons.map(b => {\n return { pressed: b.pressed };\n }),\n axes: gamepad.axes.slice(0)\n };\n }\n };\n\n promptButton = f => {\n if (!f) {\n this.buttonCallback = f;\n } else {\n this.buttonCallback = buttonInfo => {\n this.buttonCallback = null;\n f(buttonInfo);\n };\n }\n };\n\n loadGamepadConfig = () => {\n var gamepadConfig;\n try {\n gamepadConfig = localStorage.getItem(\"gamepadConfig\");\n if (gamepadConfig) {\n gamepadConfig = JSON.parse(gamepadConfig);\n }\n } catch (e) {\n console.log(\"Failed to get gamepadConfig from localStorage.\", e);\n }\n\n this.gamepadConfig = gamepadConfig;\n };\n\n setGamepadConfig = gamepadConfig => {\n try {\n localStorage.setItem(\"gamepadConfig\", JSON.stringify(gamepadConfig));\n this.gamepadConfig = gamepadConfig;\n } catch (e) {\n console.log(\"Failed to set gamepadConfig in localStorage\");\n }\n };\n\n startPolling = () => {\n if (!(navigator.getGamepads || navigator.webkitGetGamepads)) {\n return { stop: () => {} };\n }\n\n let stopped = false;\n const loop = () => {\n if (stopped) return;\n\n this.poll();\n requestAnimationFrame(loop);\n };\n requestAnimationFrame(loop);\n\n return {\n stop: () => {\n stopped = true;\n }\n };\n };\n}\n","import { Controller } from \"jsnes\";\n\n// Mapping keyboard code to [controller, button]\nconst KEYS = {\n 88: [1, Controller.BUTTON_A, \"X\"], // X\n 89: [1, Controller.BUTTON_B, \"Y\"], // Y (Central European keyboard)\n 90: [1, Controller.BUTTON_B, \"Z\"], // Z\n 17: [1, Controller.BUTTON_SELECT, \"Right Ctrl\"], // Right Ctrl\n 13: [1, Controller.BUTTON_START, \"Enter\"], // Enter\n 38: [1, Controller.BUTTON_UP, \"Up\"], // Up\n 40: [1, Controller.BUTTON_DOWN, \"Down\"], // Down\n 37: [1, Controller.BUTTON_LEFT, \"Left\"], // Left\n 39: [1, Controller.BUTTON_RIGHT, \"Right\"], // Right\n 103: [2, Controller.BUTTON_A, \"Num-7\"], // Num-7\n 105: [2, Controller.BUTTON_B, \"Num-9\"], // Num-9\n 99: [2, Controller.BUTTON_SELECT, \"Num-3\"], // Num-3\n 97: [2, Controller.BUTTON_START, \"Num-1\"], // Num-1\n 104: [2, Controller.BUTTON_UP, \"Num-8\"], // Num-8\n 98: [2, Controller.BUTTON_DOWN, \"Num-2\"], // Num-2\n 100: [2, Controller.BUTTON_LEFT, \"Num-4\"], // Num-4\n 102: [2, Controller.BUTTON_RIGHT, \"Num-6\"] // Num-6\n};\n\nexport default class KeyboardController {\n constructor(options) {\n this.onButtonDown = options.onButtonDown;\n this.onButtonUp = options.onButtonUp;\n }\n\n loadKeys = () => {\n var keys;\n try {\n keys = localStorage.getItem(\"keys\");\n if (keys) {\n keys = JSON.parse(keys);\n }\n } catch (e) {\n console.log(\"Failed to get keys from localStorage.\", e);\n }\n\n this.keys = keys || KEYS;\n };\n\n setKeys = newKeys => {\n try {\n localStorage.setItem(\"keys\", JSON.stringify(newKeys));\n this.keys = newKeys;\n } catch (e) {\n console.log(\"Failed to set keys in localStorage\");\n }\n };\n\n handleKeyDown = e => {\n var key = this.keys[e.keyCode];\n if (key) {\n this.onButtonDown(key[0], key[1]);\n e.preventDefault();\n }\n };\n\n handleKeyUp = e => {\n var key = this.keys[e.keyCode];\n if (key) {\n this.onButtonUp(key[0], key[1]);\n e.preventDefault();\n }\n };\n\n handleKeyPress = e => {\n e.preventDefault();\n };\n}\n","import React, { Component } from \"react\";\nimport \"./Screen.css\";\n\nconst SCREEN_WIDTH = 256;\nconst SCREEN_HEIGHT = 240;\n\nclass Screen extends Component {\n render() {\n return (\n {\n this.canvas = canvas;\n }}\n />\n );\n }\n\n componentDidMount() {\n this.initCanvas();\n }\n\n componentDidUpdate() {\n this.initCanvas();\n }\n\n initCanvas() {\n this.context = this.canvas.getContext(\"2d\");\n this.imageData = this.context.getImageData(\n 0,\n 0,\n SCREEN_WIDTH,\n SCREEN_HEIGHT\n );\n\n this.context.fillStyle = \"black\";\n // set alpha to opaque\n this.context.fillRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);\n\n // buffer to write on next animation frame\n this.buf = new ArrayBuffer(this.imageData.data.length);\n // Get the canvas buffer in 8bit and 32bit\n this.buf8 = new Uint8ClampedArray(this.buf);\n this.buf32 = new Uint32Array(this.buf);\n\n // Set alpha\n for (var i = 0; i < this.buf32.length; ++i) {\n this.buf32[i] = 0xff000000;\n }\n }\n\n setBuffer = buffer => {\n var i = 0;\n for (var y = 0; y < SCREEN_HEIGHT; ++y) {\n for (var x = 0; x < SCREEN_WIDTH; ++x) {\n i = y * 256 + x;\n // Convert pixel from NES BGR to canvas ABGR\n this.buf32[i] = 0xff000000 | buffer[i]; // Full alpha\n }\n }\n };\n\n writeBuffer = () => {\n this.imageData.data.set(this.buf8);\n this.context.putImageData(this.imageData, 0, 0);\n };\n\n fitInParent = () => {\n let parent = this.canvas.parentNode;\n // @ts-ignore\n let parentWidth = parent.clientWidth;\n // @ts-ignore\n let parentHeight = parent.clientHeight;\n let parentRatio = parentWidth / parentHeight;\n let desiredRatio = SCREEN_WIDTH / SCREEN_HEIGHT;\n if (desiredRatio < parentRatio) {\n this.canvas.style.width = `${Math.round(parentHeight * desiredRatio)}px`;\n this.canvas.style.height = `${parentHeight}px`;\n } else {\n this.canvas.style.width = `${parentWidth}px`;\n this.canvas.style.height = `${Math.round(parentWidth / desiredRatio)}px`;\n }\n };\n\n screenshot() {\n var img = new Image();\n img.src = this.canvas.toDataURL(\"image/png\");\n return img;\n }\n\n handleMouseDown = e => {\n if (!this.props.onMouseDown) return;\n // Make coordinates unscaled\n let scale = SCREEN_WIDTH / parseFloat(this.canvas.style.width);\n let rect = this.canvas.getBoundingClientRect();\n let x = Math.round((e.clientX - rect.left) * scale);\n let y = Math.round((e.clientY - rect.top) * scale);\n this.props.onMouseDown(x, y);\n };\n}\n\nexport default Screen;\n","import Raven from \"raven-js\";\n\nexport const handleError = (error, errorInfo) => {\n console.error(error);\n Raven.captureException(error, { extra: errorInfo });\n};\n","import RingBuffer from \"ringbufferjs\";\nimport { handleError } from \"./utils\";\n\nexport default class Speakers {\n constructor({ onBufferUnderrun }) {\n this.onBufferUnderrun = onBufferUnderrun;\n this.bufferSize = 8192;\n this.buffer = new RingBuffer(this.bufferSize * 2);\n }\n\n getSampleRate() {\n if (!window.AudioContext) {\n return 44100;\n }\n let myCtx = new window.AudioContext();\n let sampleRate = myCtx.sampleRate;\n myCtx.close();\n return sampleRate;\n }\n\n start() {\n // Audio is not supported\n if (!window.AudioContext) {\n return;\n }\n this.audioCtx = new window.AudioContext();\n this.scriptNode = this.audioCtx.createScriptProcessor(1024, 0, 2);\n this.scriptNode.onaudioprocess = this.onaudioprocess;\n this.scriptNode.connect(this.audioCtx.destination);\n }\n\n stop() {\n if (this.scriptNode) {\n this.scriptNode.disconnect(this.audioCtx.destination);\n this.scriptNode.onaudioprocess = null;\n this.scriptNode = null;\n }\n if (this.audioCtx) {\n this.audioCtx.close().catch(handleError);\n this.audioCtx = null;\n }\n }\n\n writeSample = (left, right) => {\n if (this.buffer.size() / 2 >= this.bufferSize) {\n console.log(`Buffer overrun`);\n this.buffer.deqN(this.bufferSize / 2);\n }\n this.buffer.enq(left);\n this.buffer.enq(right);\n };\n\n onaudioprocess = e => {\n var left = e.outputBuffer.getChannelData(0);\n var right = e.outputBuffer.getChannelData(1);\n var size = left.length;\n\n // We're going to buffer underrun. Attempt to fill the buffer.\n if (this.buffer.size() < size * 2 && this.onBufferUnderrun) {\n this.onBufferUnderrun(this.buffer.size(), size * 2);\n }\n\n try {\n var samples = this.buffer.deqN(size * 2);\n } catch (e) {\n // onBufferUnderrun failed to fill the buffer, so handle a real buffer\n // underrun\n\n // ignore empty buffers... assume audio has just stopped\n var bufferSize = this.buffer.size() / 2;\n if (bufferSize > 0) {\n console.log(`Buffer underrun (needed ${size}, got ${bufferSize})`);\n }\n for (var j = 0; j < size; j++) {\n left[j] = 0;\n right[j] = 0;\n }\n return;\n }\n for (var i = 0; i < size; i++) {\n left[i] = samples[i * 2];\n right[i] = samples[i * 2 + 1];\n }\n };\n}\n","import Raven from \"raven-js\";\nimport React, { Component } from \"react\";\nimport PropTypes from \"prop-types\";\nimport { NES } from \"jsnes\";\n\nimport FrameTimer from \"./FrameTimer\";\nimport GamepadController from \"./GamepadController\";\nimport KeyboardController from \"./KeyboardController\";\nimport Screen from \"./Screen\";\nimport Speakers from \"./Speakers\";\n\n/*\n * Runs the emulator.\n *\n * The only UI is a canvas element. It assumes it is a singleton in various ways\n * (binds to window, keyboard, speakers, etc).\n */\nclass Emulator extends Component {\n render() {\n return (\n {\n this.screen = screen;\n }}\n onGenerateFrame={() => {\n this.nes.frame();\n }}\n onMouseDown={(x, y) => {\n this.nes.zapperMove(x, y);\n this.nes.zapperFireDown();\n }}\n onMouseUp={() => {\n this.nes.zapperFireUp();\n }}\n />\n );\n }\n\n componentDidMount() {\n // Initial layout\n this.fitInParent();\n\n this.speakers = new Speakers({\n onBufferUnderrun: (actualSize, desiredSize) => {\n if (this.props.paused) {\n return;\n }\n // Skip a video frame so audio remains consistent. This happens for\n // a variety of reasons:\n // - Frame rate is not quite 60fps, so sometimes buffer empties\n // - Page is not visible, so requestAnimationFrame doesn't get fired.\n // In this case emulator still runs at full speed, but timing is\n // done by audio instead of requestAnimationFrame.\n // - System can't run emulator at full speed. In this case it'll stop\n // firing requestAnimationFrame.\n console.log(\n \"Buffer underrun, running another frame to try and catch up\"\n );\n\n this.frameTimer.generateFrame();\n // desiredSize will be 2048, and the NES produces 1468 samples on each\n // frame so we might need a second frame to be run. Give up after that\n // though -- the system is not catching up\n if (this.speakers.buffer.size() < desiredSize) {\n console.log(\"Still buffer underrun, running a second frame\");\n this.frameTimer.generateFrame();\n }\n }\n });\n\n this.nes = new NES({\n onFrame: this.screen.setBuffer,\n onStatusUpdate: console.log,\n onAudioSample: this.speakers.writeSample,\n sampleRate: this.speakers.getSampleRate()\n });\n\n // For debugging. ([\"nes\"] instead of .nes to avoid VS Code type errors.)\n window[\"nes\"] = this.nes;\n\n this.frameTimer = new FrameTimer({\n onGenerateFrame: Raven.wrap(this.nes.frame),\n onWriteFrame: Raven.wrap(this.screen.writeBuffer)\n });\n\n // Set up gamepad and keyboard\n this.gamepadController = new GamepadController({\n onButtonDown: this.nes.buttonDown,\n onButtonUp: this.nes.buttonUp\n });\n\n this.gamepadController.loadGamepadConfig();\n this.gamepadPolling = this.gamepadController.startPolling();\n\n this.keyboardController = new KeyboardController({\n onButtonDown: this.gamepadController.disableIfGamepadEnabled(\n this.nes.buttonDown\n ),\n onButtonUp: this.gamepadController.disableIfGamepadEnabled(\n this.nes.buttonUp\n )\n });\n\n // Load keys from localStorage (if they exist)\n this.keyboardController.loadKeys();\n\n document.addEventListener(\"keydown\", this.keyboardController.handleKeyDown);\n document.addEventListener(\"keyup\", this.keyboardController.handleKeyUp);\n document.addEventListener(\n \"keypress\",\n this.keyboardController.handleKeyPress\n );\n\n this.nes.loadROM(this.props.romData);\n this.start();\n }\n\n componentWillUnmount() {\n this.stop();\n\n // Unbind keyboard\n document.removeEventListener(\n \"keydown\",\n this.keyboardController.handleKeyDown\n );\n document.removeEventListener(\"keyup\", this.keyboardController.handleKeyUp);\n document.removeEventListener(\n \"keypress\",\n this.keyboardController.handleKeyPress\n );\n\n // Stop gamepad\n this.gamepadPolling.stop();\n\n window[\"nes\"] = undefined;\n }\n\n componentDidUpdate(prevProps) {\n if (this.props.paused !== prevProps.paused) {\n if (this.props.paused) {\n this.stop();\n } else {\n this.start();\n }\n }\n\n // TODO: handle changing romData\n }\n\n start = () => {\n this.frameTimer.start();\n this.speakers.start();\n this.fpsInterval = setInterval(() => {\n console.log(`FPS: ${this.nes.getFPS()}`);\n }, 1000);\n };\n\n stop = () => {\n this.frameTimer.stop();\n this.speakers.stop();\n clearInterval(this.fpsInterval);\n };\n\n /*\n * Fill parent element with screen. Typically called if parent element changes size.\n */\n fitInParent() {\n this.screen.fitInParent();\n }\n}\n\nEmulator.propTypes = {\n paused: PropTypes.bool,\n romData: PropTypes.string.isRequired\n};\n\nexport default Emulator;\n","import React, { Component } from \"react\";\nimport { Button, Progress } from \"reactstrap\";\nimport { Link } from \"react-router-dom\";\n\nimport config from \"./config\";\nimport ControlsModal from \"./ControlsModal\";\nimport Emulator from \"./Emulator\";\nimport RomLibrary from \"./RomLibrary\";\n\nimport \"./RunPage.css\";\n\nfunction loadBinary(path, callback, handleProgress) {\n var req = new XMLHttpRequest();\n req.open(\"GET\", path);\n req.overrideMimeType(\"text/plain; charset=x-user-defined\");\n req.onload = function() {\n if (this.status === 200) {\n if (req.responseText.match(/^/i)) {\n // Got HTML back, so it is probably falling back to index.html due to 404\n return callback(new Error(\"Page not found\"));\n }\n\n callback(null, this.responseText);\n } else if (this.status === 0) {\n // Aborted, so ignore error\n } else {\n callback(new Error(req.statusText));\n }\n };\n req.onerror = function() {\n callback(new Error(req.statusText));\n };\n req.onprogress = handleProgress;\n req.send();\n return req;\n}\n\n/*\n * The UI for the emulator. Also responsible for loading ROM from URL or file.\n */\nclass RunPage extends Component {\n constructor(props) {\n super(props);\n this.state = {\n romName: null,\n romData: null,\n running: false,\n paused: false,\n controlsModalOpen: false,\n loading: true,\n loadedPercent: 3,\n error: null\n };\n }\n\n render() {\n return (\n
\n {\n this.navbar = el;\n }}\n >\n
    \n
  • \n \n ‹ Back\n \n
    • \n
\n
    \n
  • \n {this.state.romName}\n
    • \n
\n
    \n
  • \n \n Controls\n \n
    • \n
\n \n\n {this.state.error ? (\n this.state.error\n ) : (\n {\n this.screenContainer = el;\n }}\n >\n {this.state.loading ? (\n \n ) : this.state.romData ? (\n {\n this.emulator = emulator;\n }}\n />\n ) : null}\n\n {/* TODO: lift keyboard and gamepad state up */}\n {this.state.controlsModalOpen && (\n \n )}\n
\n )}\n \n );\n }\n\n componentDidMount() {\n window.addEventListener(\"resize\", this.layout);\n this.layout();\n this.load();\n }\n\n componentWillUnmount() {\n window.removeEventListener(\"resize\", this.layout);\n if (this.currentRequest) {\n this.currentRequest.abort();\n }\n }\n\n load = () => {\n if (this.props.match.params.slug) {\n const slug = this.props.match.params.slug;\n const isLocalROM = /^local-/.test(slug);\n const romHash = slug.split(\"-\")[1];\n const romInfo = isLocalROM\n ? RomLibrary.getRomInfoByHash(romHash)\n : config.ROMS[slug];\n\n if (!romInfo) {\n this.setState({ error: `No such ROM: ${slug}` });\n return;\n }\n\n if (isLocalROM) {\n this.setState({ romName: romInfo.name });\n const localROMData = localStorage.getItem(\"blob-\" + romHash);\n this.handleLoaded(localROMData);\n } else {\n this.setState({ romName: romInfo.description });\n this.currentRequest = loadBinary(\n romInfo.url,\n (err, data) => {\n if (err) {\n this.setState({ error: `Error loading ROM: ${err.message}` });\n } else {\n this.handleLoaded(data);\n }\n },\n this.handleProgress\n );\n }\n } else if (this.props.location.state && this.props.location.state.file) {\n let reader = new FileReader();\n reader.readAsBinaryString(this.props.location.state.file);\n reader.onload = e => {\n this.currentRequest = null;\n this.handleLoaded(reader.result);\n };\n } else {\n this.setState({ error: \"No ROM provided\" });\n }\n };\n\n handleProgress = e => {\n if (e.lengthComputable) {\n this.setState({ loadedPercent: (e.loaded / e.total) * 100 });\n }\n };\n\n handleLoaded = data => {\n this.setState({ running: true, loading: false, romData: data });\n };\n\n handlePauseResume = () => {\n this.setState({ paused: !this.state.paused });\n };\n\n layout = () => {\n let navbarHeight = parseFloat(window.getComputedStyle(this.navbar).height);\n this.screenContainer.style.height = `${window.innerHeight -\n navbarHeight}px`;\n if (this.emulator) {\n this.emulator.fitInParent();\n }\n };\n\n toggleControlsModal = () => {\n this.setState({ controlsModalOpen: !this.state.controlsModalOpen });\n };\n}\n\nexport default RunPage;\n","import React, { Component } from \"react\";\nimport GoogleAnalytics from \"react-ga\";\nimport { BrowserRouter, Route } from \"react-router-dom\";\nimport ListPage from \"./ListPage\";\nimport RunPage from \"./RunPage\";\nimport config from \"./config\";\nimport { handleError } from \"./utils\";\nimport \"./App.css\";\n\nclass App extends Component {\n constructor(props) {\n super(props);\n this.state = { error: null };\n if (config.GOOGLE_ANALYTICS_CODE) {\n GoogleAnalytics.initialize(config.GOOGLE_ANALYTICS_CODE);\n }\n }\n\n render() {\n if (this.state.error) {\n return (\n
\n
\n
\n Oops - there has been an error. It has been logged to the console.\n
\n
\n
\n );\n }\n return (\n \n
\n \n \n \n \n
\n \n );\n }\n\n componentDidCatch(error, errorInfo) {\n this.setState({ error });\n handleError(error, errorInfo);\n }\n\n recordPageview = ({ location }) => {\n GoogleAnalytics.pageview(location.pathname);\n return null;\n };\n}\n\nexport default App;\n","import Raven from \"raven-js\";\nimport React from \"react\";\nimport ReactDOM from \"react-dom\";\nimport App from \"./App\";\nimport config from \"./config\";\nimport \"./index.scss\";\n\nif (config.SENTRY_URI) {\n Raven.config(config.SENTRY_URI).install();\n}\n\nRaven.context(function() {\n ReactDOM.render(, document.getElementById(\"root\"));\n});\n"],"sourceRoot":""}