apple2js/js/main2.js

1014 lines
27 KiB
JavaScript

import MicroModal from 'micromodal';
import Apple2IO from './apple2io';
import ApplesoftDump from './applesoft/decompiler';
import { HiresPage, LoresPage, VideoModes } from './canvas';
import CPU6502 from './cpu6502';
import Prefs from './prefs';
import RAM from './ram';
import { debug, gup, hup } from './util';
import Audio from './ui/audio';
import DriveLights from './ui/drive_lights';
import { gamepad, configGamepad, initGamepad, processGamepad } from './ui/gamepad';
import KeyBoard from './ui/keyboard';
import Printer from './ui/printer';
import Tape, { TAPE_TYPES } from './ui/tape';
import DiskII, { DISK_TYPES } from './cards/disk2';
import LanguageCard from './cards/langcard';
import Parallel from './cards/parallel';
import RAMFactor from './cards/ramfactor';
import Thunderclock from './cards/thunderclock';
import Videoterm from './cards/videoterm';
import apple2_charset from './roms/apple2_char';
import apple2j_charset from './roms/apple2j_char';
import apple2lc_charset from './roms/apple2lc_char';
import pigfont_charset from './roms/pigfont_char';
import Apple2ROM from './roms/fpbasic';
import Apple2jROM from './roms/apple2j_char';
import IntBASIC from './roms/intbasic';
import OriginalROM from './roms/original';
import SYMBOLS from './symbols';
var kHz = 1023;
var focused = false;
var startTime = Date.now();
var lastCycles = 0;
var renderedFrames = 0, lastFrames = 0;
var paused = false;
var hashtag;
var DEBUG = false;
var TRACE = false;
var MAX_TRACE = 256;
var trace = [];
var disk_categories = {'Local Saves': []};
var disk_sets = {};
var disk_cur_name = [];
var disk_cur_cat = [];
var _currentDrive = 1;
export function openLoad(drive, event)
{
_currentDrive = parseInt(drive, 10);
if (event.metaKey) {
openLoadHTTP(drive);
} else {
if (disk_cur_cat[drive]) {
document.querySelector('#category_select').value = disk_cur_cat[drive];
selectCategory();
}
MicroModal.show('load-modal');
}
}
export function openSave(drive, event)
{
_currentDrive = parseInt(drive, 10);
var mimetype = 'application/octet-stream';
var data = disk2.getBinary(drive);
var a = document.querySelector('#local_save_link');
var blob = new Blob([data], { 'type': mimetype });
a.href = window.URL.createObjectURL(blob);
a.download = drivelights.label(drive) + '.dsk';
if (event.metaKey) {
dumpDisk(drive);
} else {
document.querySelector('#save_name').value = drivelights.label(drive);
MicroModal.show('save-modal');
}
}
export function handleDragOver(drive, event) {
event.preventDefault();
event.dataTransfer.dropEffect = 'copy';
}
export function handleDragEnd(drive, event) {
var dt = event.dataTransfer;
if (dt.items) {
for (var i = 0; i < dt.items.length; i++) {
dt.items.remove(i);
}
} else {
event.dataTransfer.clearData();
}
}
export function handleDrop(drive, event) {
event.preventDefault();
event.stopPropagation();
if (drive < 1) {
if (!disk2.getMetadata(1)) {
drive = 1;
} else if (!disk2.getMetadata(2)) {
drive = 2;
} else {
drive = 1;
}
}
var dt = event.dataTransfer;
if (dt.files.length == 1) {
doLoadLocal(drive, dt.files[0]);
} else if (dt.files.length == 2) {
doLoadLocal(1, dt.files[0]);
doLoadLocal(2, dt.files[1]);
} else {
for (var idx = 0; idx < dt.items.length; idx++) {
if (dt.items[idx].type === 'text/uri-list') {
dt.items[idx].getAsString(function(url) {
var parts = document.location.hash.split('|');
parts[drive - 1] = url;
document.location.hash = parts.join('|');
});
}
}
}
}
var loading = false;
function loadAjax(drive, url) {
loading = true;
MicroModal.show('loading-modal');
fetch(url).then(function(response) {
return response.json();
}).then(function(data) {
if (data.type == 'binary') {
loadBinary(drive, data);
} else if (DISK_TYPES.includes(data.type)) {
loadDisk(drive, data);
}
initGamepad(data.gamepad);
MicroModal.close('loading-modal');
loading = false;
}).catch(function(error) {
window.alert(error || status);
MicroModal.close('loading-modal');
loading = false;
});
}
export function doLoad() {
MicroModal.close('load-modal');
var urls = document.querySelector('#disk_select').value, url;
if (urls && urls.length) {
if (typeof(urls) == 'string') {
url = urls;
} else {
url = urls[0];
}
}
var files = document.querySelector('#local_file').files;
if (files.length == 1) {
doLoadLocal(_currentDrive, files[0]);
} else if (url) {
var filename;
MicroModal.close('load-modal');
if (url.substr(0,6) == 'local:') {
filename = url.substr(6);
if (filename == '__manage') {
openManage();
} else {
loadLocalStorage(_currentDrive, filename);
}
} else {
var r1 = /json\/disks\/(.*).json$/.exec(url);
if (r1) {
filename = r1[1];
} else {
filename = url;
}
var parts = document.location.hash.split('|');
parts[_currentDrive - 1] = filename;
document.location.hash = parts.join('|');
}
}
}
export function doSave() {
var name = document.querySelector('#save_name').value;
saveLocalStorage(_currentDrive, name);
MicroModal.close('save-modal');
}
export function doDelete(name) {
if (window.confirm('Delete ' + name + '?')) {
deleteLocalStorage(name);
}
}
function doLoadLocal(drive, file) {
var parts = file.name.split('.');
var ext = parts[parts.length - 1].toLowerCase();
if (DISK_TYPES.includes(ext)) {
doLoadLocalDisk(drive, file);
} else if ($.inArray(ext, TAPE_TYPES) >= 0) {
tape.doLoadLocalTape(file, function() {
MicroModal.close('load-modal');
});
} else {
window.alert('Unknown file type: ' + ext);
MicroModal.close('load-modal');
}
}
function doLoadLocalDisk(drive, file) {
var fileReader = new FileReader();
fileReader.onload = function() {
var parts = file.name.split('.');
var ext = parts.pop().toLowerCase();
var name = parts.join('.');
if (disk2.setBinary(drive, name, ext, this.result)) {
drivelights.label(drive, name);
MicroModal.close('load-modal');
initGamepad();
}
};
fileReader.readAsArrayBuffer(file);
}
function doLoadHTTP(drive, _url) {
var url = _url || document.querySelector('#http_url').value;
if (url) {
var req = new XMLHttpRequest();
req.open('GET', url, true);
req.responseType = 'arraybuffer';
req.onload = function() {
var urlParts = url.split('/');
var file = urlParts.pop();
var fileParts = file.split('.');
var ext = fileParts.pop().toLowerCase();
var name = decodeURIComponent(fileParts.join('.'));
if (disk2.setBinary(drive, name, ext, req.response)) {
drivelights.label(drive, name);
MicroModal.close('http-modal');
initGamepad();
}
};
req.send(null);
}
}
function openLoadHTTP(drive) {
_currentDrive = parseInt(drive, 10);
MicroModal.show('http-modal');
}
function openManage() {
MicroModal.show('manage-modal');
}
var prefs = new Prefs();
var romVersion = prefs.readPref('computer_type2');
var multiScreen = false;
var rom;
var char_rom = apple2_charset;
switch (romVersion) {
case 'apple2':
rom = new IntBASIC();
break;
case 'original':
rom = new OriginalROM();
break;
case 'apple2jplus':
rom = new Apple2jROM();
char_rom = apple2j_charset;
break;
case 'apple2pig':
rom = new Apple2ROM();
char_rom = pigfont_charset;
break;
case 'apple2lc':
rom = new Apple2ROM();
char_rom = apple2lc_charset;
break;
default:
rom = new Apple2ROM();
}
var runTimer = null;
var cpu = new CPU6502();
var context1, context2, context3, context4;
var canvas1 = document.getElementById('screen');
var canvas2 = document.getElementById('screen2');
var canvas3 = document.getElementById('screen3');
var canvas4 = document.getElementById('screen4');
context1 = canvas1.getContext('2d');
if (canvas4) {
multiScreen = true;
context2 = canvas2.getContext('2d');
context3 = canvas3.getContext('2d');
context4 = canvas4.getContext('2d');
} else if (canvas2) {
multiScreen = true;
context2 = context1;
context3 = canvas2.getContext('2d');
context4 = context3;
} else {
context2 = context1;
context3 = context1;
context4 = context1;
}
var gr = new LoresPage(1, char_rom, false, context1);
var gr2 = new LoresPage(2, char_rom, false, context2);
var hgr = new HiresPage(1, context3);
var hgr2 = new HiresPage(2, context4);
var ram1 = new RAM(0x00, 0x03),
ram2 = new RAM(0x0C, 0x1F),
ram3 = new RAM(0x60, 0xBF);
var vm = new VideoModes(gr, hgr, gr2, hgr2, false);
vm.multiScreen(multiScreen);
var dumper = new ApplesoftDump(cpu);
var drivelights = new DriveLights();
var io = new Apple2IO(cpu, vm);
var keyboard = new KeyBoard(cpu, io);
var audio = new Audio(io);
var tape = new Tape(io);
var printer = new Printer('#printer-modal .paper');
var lc = new LanguageCard(io, 0, rom);
var parallel = new Parallel(io, 1, printer);
var slinky = new RAMFactor(io, 2, 1024 * 1024);
var videoterm = new Videoterm(io, 3, context1);
var disk2 = new DiskII(io, 6, drivelights);
var clock = new Thunderclock(io, 7);
cpu.addPageHandler(ram1);
cpu.addPageHandler(gr);
cpu.addPageHandler(gr2);
cpu.addPageHandler(ram2);
cpu.addPageHandler(hgr);
cpu.addPageHandler(hgr2);
cpu.addPageHandler(ram3);
cpu.addPageHandler(io);
cpu.addPageHandler(lc);
io.setSlot(0, lc);
io.setSlot(1, parallel);
io.setSlot(2, slinky);
io.setSlot(3, videoterm);
io.setSlot(6, disk2);
io.setSlot(7, clock);
var showFPS = false;
function updateKHz() {
var now = Date.now();
var ms = now - startTime;
var cycles = cpu.cycles();
var delta;
if (showFPS) {
delta = renderedFrames - lastFrames;
var fps = parseInt(delta/(ms/1000), 10);
document.querySelector('#khz').innerText = fps + 'fps';
} else {
delta = cycles - lastCycles;
var khz = parseInt(delta/ms);
document.querySelector('#khz').innerText = khz + 'KHz';
}
startTime = now;
lastCycles = cycles;
lastFrames = renderedFrames;
}
export function toggleShowFPS() {
showFPS = !showFPS;
}
export function updateSound() {
var on = document.querySelector('#enable_sound').checked;
var label = document.querySelector('#toggle-sound i');
audio.enable(on);
if (on) {
label.classList.remove('fa-volume-off');
label.classList.add('fa-volume-up');
} else {
label.classList.remove('fa-volume-up');
label.classList.add('fa-volume-off');
}
};
function dumpDisk(drive) {
var wind = window.open('', '_blank');
wind.document.title = drivelights.label(drive);
wind.document.write('<pre>');
wind.document.write(disk2.getJSON(drive, true));
wind.document.write('</pre>');
wind.document.close();
}
export function dumpProgram() {
var wind = window.open('', '_blank');
wind.document.title = 'Program Listing';
wind.document.write('<pre>');
wind.document.write(dumper.toString());
wind.document.write('</pre>');
wind.document.close();
}
export function step()
{
if (runTimer) {
clearInterval(runTimer);
}
runTimer = null;
cpu.step(function() {
debug(cpu.dumpRegisters());
debug(cpu.dumpPC());
});
}
var accelerated = false;
export function updateCPU()
{
accelerated = document.querySelector('#accelerator_toggle').checked;
kHz = accelerated ? 4092 : 1023;
io.updateHz(kHz * 1000);
if (runTimer) {
run();
}
};
var _requestAnimationFrame =
window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.msRequestAnimationFrame;
function run(pc) {
if (runTimer) {
clearInterval(runTimer);
}
if (pc) {
cpu.setPC(pc);
}
var ival = 30;
var now, last = Date.now();
var runFn = function() {
now = Date.now();
var step = (now - last) * kHz, stepMax = kHz * ival;
last = now;
if (step > stepMax) {
step = stepMax;
}
if (document.location.hash != hashtag) {
hashtag = document.location.hash;
var hash = hup();
if (hash) {
processHash(hash);
}
}
if (!loading) {
if (DEBUG) {
cpu.stepCyclesDebug(TRACE ? 1 : step, function() {
var line = cpu.dumpRegisters() + ' ' +
cpu.dumpPC(undefined, SYMBOLS);
if (TRACE) {
debug(line);
} else {
trace.push(line);
if (trace.length > MAX_TRACE) {
trace.shift();
}
}
});
} else {
cpu.stepCycles(step);
}
if (io.annunciator(0)) {
if (multiScreen) {
vm.blit();
}
if (videoterm.blit()) {
renderedFrames++;
}
} else {
if (vm.blit()) {
renderedFrames++;
}
}
io.tick();
}
processGamepad(io);
if (!paused && _requestAnimationFrame) {
_requestAnimationFrame(runFn);
}
};
if (_requestAnimationFrame) {
_requestAnimationFrame(runFn);
} else {
runTimer = setInterval(runFn, ival);
}
}
function stop() {
if (runTimer) {
clearInterval(runTimer);
}
runTimer = null;
}
var state = null;
function storeStateLocal() {
window.localStorage['apple2.state'] = JSON.stringify(state);
}
function restoreStateLocal() {
var data = window.localStorage['apple2.state'];
if (data) {
state = JSON.parse(data);
}
}
function saveState() {
if (state && !window.confirm('Overwrite Saved State?')) {
return;
}
state = {
cpu: cpu.getState(),
ram1: ram1.getState(),
ram2: ram2.getState(),
ram3: ram3.getState(),
io: io.getState(),
lc: lc.getState(),
vm: vm.getState(),
disk2: disk2.getState(),
drivelights: drivelights.getState()
};
if (slinky) {
state.slinky = slinky.getState();
}
if (window.localStorage) {
storeStateLocal();
}
}
function restoreState() {
if (window.localStorage) {
restoreStateLocal();
}
if (!state) {
return;
}
cpu.setState(state.cpu);
ram1.setState(state.ram1);
ram2.setState(state.ram2);
ram3.setState(state.ram3);
io.setState(state.io);
lc.setState(state.lc);
vm.setState(state.vm);
disk2.setState(state.disk2);
drivelights.setState(state.drivelights);
if (slinky && state.slinky) {
slinky.setState(state.slinky);
}
}
function loadBinary(bin) {
stop();
for (var idx = 0; idx < bin.length; idx++) {
var pos = bin.start + idx;
cpu.write(pos >> 8, pos & 0xff, bin.data[idx]);
}
run(bin.start);
}
export function selectCategory() {
document.querySelector('#disk_select').innerHTML = '';
var cat = disk_categories[document.querySelector('#category_select').value];
if (cat) {
for (var idx = 0; idx < cat.length; idx++) {
var file = cat[idx], name = file.name;
if (file.disk) {
name += ' - ' + file.disk;
}
var option = document.createElement('option');
option.value = file.filename;
option.innerText = name;
document.querySelector('#disk_select').append(option);
if (disk_cur_name[_currentDrive] == name) {
option.selected = true;
}
}
}
}
export function selectDisk() {
document.querySelector('#local_file').value = '';
}
export function clickDisk() {
doLoad();
}
function loadDisk(drive, disk) {
var name = disk.name;
var category = disk.category;
if (disk.disk) {
name += ' - ' + disk.disk;
}
disk_cur_cat[drive] = category;
disk_cur_name[drive] = name;
drivelights.label(drive, name);
disk2.setDisk(drive, disk);
initGamepad(disk.gamepad);
}
/*
* LocalStorage Disk Storage
*/
function updateLocalStorage() {
var diskIndex = JSON.parse(window.localStorage.diskIndex || '{}');
var names = [], name, cat;
for (name in diskIndex) {
if (diskIndex.hasOwnProperty(name)) {
names.push(name);
}
}
cat = disk_categories['Local Saves'] = [];
document.querySelector('#manage-modal-content').innerHTML = '';
names.forEach(function(name) {
cat.push({
'category': 'Local Saves',
'name': name,
'filename': 'local:' + name
});
document.querySelector('#manage-modal-content').innerHTML =
'<span class="local_save">' +
name +
' <a href="#" onclick="doDelete(\'' +
name +
'\')">Delete</a><br /></span>';
});
cat.push({
'category': 'Local Saves',
'name': 'Manage Saves...',
'filename': 'local:__manage'
});
}
function saveLocalStorage(drive, name) {
var diskIndex = JSON.parse(window.localStorage.diskIndex || '{}');
var json = disk2.getJSON(drive);
diskIndex[name] = json;
window.localStorage.diskIndex = JSON.stringify(diskIndex);
window.alert('Saved');
drivelights.label(drive, name);
drivelights.dirty(drive, false);
updateLocalStorage();
}
function deleteLocalStorage(name) {
var diskIndex = JSON.parse(window.localStorage.diskIndex || '{}');
if (diskIndex[name]) {
delete diskIndex[name];
window.alert('Deleted');
}
window.localStorage.diskIndex = JSON.stringify(diskIndex);
updateLocalStorage();
}
function loadLocalStorage(drive, name) {
var diskIndex = JSON.parse(window.localStorage.diskIndex || '{}');
if (diskIndex[name]) {
disk2.setJSON(drive, diskIndex[name]);
drivelights.label(drive, name);
drivelights.dirty(drive, false);
}
}
function processHash(hash) {
var files = hash.split('|');
for (var idx = 0; idx < files.length; idx++) {
var file = files[idx];
if (file.indexOf('://') > 0) {
var parts = file.split('.');
var ext = parts[parts.length - 1].toLowerCase();
if (ext == 'json') {
loadAjax(idx + 1, file);
} else {
doLoadHTTP(idx + 1, file);
}
} else {
loadAjax(idx + 1, 'json/disks/' + file + '.json');
}
}
}
/*
* Keyboard/Gamepad routines
*/
function _keydown(evt) {
if (!focused && (!evt.metaKey || evt.ctrlKey)) {
evt.preventDefault();
var key = keyboard.mapKeyEvent(evt);
if (key != 0xff) {
io.keyDown(key);
}
}
if (evt.keyCode === 112) { // F1 - Reset
cpu.reset();
evt.preventDefault(); // prevent launching help
} else if (evt.keyCode === 113) { // F2 - Full Screen
var elem = document.getElementById('screen');
if (evt.shiftKey) { // Full window, but not full screen
document.querySelector('#display').classList.toggle('zoomwindow');
document.querySelector('#display > div').classList.toggle('overscan');
document.querySelector('#display > div').classList.toggle('flexbox-centering');
document.querySelector('#screen').classList.toggle('maxhw');
document.querySelector('#header').classList.toggle('hidden');
document.querySelectorAll('.inset').forEach((el) => el.classList.toggle('hidden'));
} else if (document.webkitCancelFullScreen) {
if (document.webkitIsFullScreen) {
document.webkitCancelFullScreen();
} else {
if (Element.ALLOW_KEYBOARD_INPUT) {
elem.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
} else {
elem.webkitRequestFullScreen();
}
}
} else if (document.mozCancelFullScreen) {
if (document.mozIsFullScreen) {
document.mozCancelFullScreen();
} else {
elem.mozRequestFullScreen();
}
}
} else if (evt.keyCode === 114) { // F3
io.keyDown(0x1b);
} else if (evt.keyCode === 117) { // F6 Quick Save
saveState();
} else if (evt.keyCode === 120) { // F9 Quick Restore
restoreState();
} else if (evt.keyCode == 16) { // Shift
keyboard.shiftKey(true);
} else if (evt.keyCode == 17) { // Control
keyboard.controlKey(true);
}
}
function _keyup(evt) {
if (!focused)
io.keyUp();
if (evt.keyCode == 16) { // Shift
keyboard.shiftKey(false);
} else if (evt.keyCode == 17) { // Control
keyboard.controlKey(false);
}
}
export function updateScreen() {
var green = document.querySelector('#green_screen').checked;
var scanlines = document.querySelector('#show_scanlines').checked;
vm.green(green);
vm.scanlines(scanlines);
};
var disableMouseJoystick = false;
var flipX = false;
var flipY = false;
var swapXY = false;
export function updateJoystick() {
disableMouseJoystick = document.querySelector('#disable_mouse').checked;
flipX = document.querySelector('#flip_x').checked;
flipY = document.querySelector('#flip_y').checked;
swapXY = document.querySelector('#swap_x_y').checked;
configGamepad(flipX, flipY);
if (disableMouseJoystick) {
io.paddle(0, 0.5);
io.paddle(1, 0.5);
return;
}
}
function _mousemove(evt) {
if (gamepad || disableMouseJoystick) {
return;
}
var s = document.querySelector('#screen');
var offset = { top: s.clientTop, left: s.clientLeft };
var x = (evt.pageX - offset.left) / s.clientWidth,
y = (evt.pageY - offset.top) / s.clientHeight,
z = x;
if (swapXY) {
x = y;
y = z;
}
io.paddle(0, flipX ? 1 - x : x);
io.paddle(1, flipY ? 1 - y : y);
}
export function pauseRun() {
var label = document.querySelector('#pause-run i');
if (paused) {
run();
label.classList.remove('fa-play');
label.classList.add('fa-pause');
} else {
stop();
label.classList.remove('fa-pause');
label.classList.add('fa-play');
}
paused = !paused;
}
export function toggleSound() {
var enableSound = document.querySelector('#enable_sound');
enableSound.checked = !enableSound.checked;
updateSound();
}
export function openOptions() {
MicroModal.show('options-modal');
};
export function openPrinterModal() {
MicroModal.show('printer-modal');
};
MicroModal.init();
document.addEventListener('DOMContentLoaded', function() {
hashtag = document.location.hash;
/*
* Input Handling
*/
window.addEventListener('keydown', _keydown);
window.addEventListener('keyup', _keyup);
window.addEventListener('mousedown', function() { audio.autoStart(); });
document.querySelectorAll('canvas').forEach(function(canvas) {
canvas.addEventListener('mousedown', function(evt) {
if (!gamepad) {
io.buttonDown(evt.which == 1 ? 0 : 1);
}
evt.preventDefault();
});
canvas.addEventListener('mouseup', function(evt) {
if (!gamepad) {
io.buttonUp(evt.which == 1 ? 0 : 1);
}
});
});
document.body.addEventListener('mousemove', _mousemove);
document.querySelectorAll('input,textarea').forEach(function(input) {
input.addEventListener('input', function() { focused = true; });
input.addEventListener('blur', function() { focused = false; });
});
keyboard.create('#keyboard');
if (prefs.havePrefs()) {
document.querySelectorAll('#options-modal input[type=checkbox]').forEach(function(el) {
var val = prefs.readPref(el.id);
if (val) {
el.checked = JSON.parse(val);
}
el.addEventListener('change', function() {
prefs.writePref(el.id, JSON.stringify(el.checked));
});
});
document.querySelectorAll('#options-modal select').forEach(function(el) {
var val = prefs.readPref(el.id);
if (val) {
el.value = val;
}
el.addEventListener('change', function() {
prefs.writePref(el.id, el.value);
});
});
}
cpu.reset();
setInterval(updateKHz, 1000);
updateSound();
updateScreen();
updateCPU();
if (window.localStorage !== undefined) {
document.querySelectorAll('.disksave').forEach(function (el) { el.style.display = 'inline-block';});
}
var oldcat = '';
var option;
for (var idx = 0; idx < window.disk_index.length; idx++) {
var file = window.disk_index[idx];
var cat = file.category;
var name = file.name, disk = file.disk;
if (file.e) {
continue;
}
if (cat != oldcat) {
option = document.createElement('option');
option.value = cat;
option.innerText = cat;
document.querySelector('#category_select').append(option);
disk_categories[cat] = [];
oldcat = cat;
}
disk_categories[cat].push(file);
if (disk) {
if (!disk_sets[name]) {
disk_sets[name] = [];
}
disk_sets[name].push(file);
}
}
option = document.createElement('option');
option.innerText = 'Local Saves';
document.querySelector('#category_select').append(option);
updateLocalStorage();
initGamepad();
// Check for disks in hashtag
var hash = gup('disk') || hup();
if (hash) {
processHash(hash);
}
if (navigator.standalone) {
document.body.classList.add('standalone');
}
var reptKey = document.querySelector('.key-REPT');
reptKey.addEventListener('click', function() {
document.querySelector('#keyboard').style.display = 'none';
document.querySelector('#textarea').style.display = 'block';
document.querySelector.focus();
});
document.querySelector('#text_input').addEventListener('keydown', function() {
focused = document.querySelector('#buffering').checked;
});
document.querySelector('#text_input').addEventListener('keyup', function() {
focused = document.querySelector('#buffering').checked;
});
run();
});