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codeworld.js
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/*
* Copyright 2020 The CodeWorld Authors. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { handleIncomingMessage as passMessageToCodeExplorer } from './codeExplorer.js';
import {
createFolder,
definePanelExtension,
deleteFolder_,
deleteProject_,
getNearestDirectory,
initDirectoryTree,
initializeLayoutContainer,
LAYOUT_CONTAINER_CLASSNAME,
loadProject,
loadSample,
loadTreeNodes,
markFailed,
onHover,
parseCompileErrors,
parseSymbolsFromCurrentCode,
printMessage,
registerStandardHints,
renderDeclaration,
run,
saveProjectBase,
saveProjectAsBase,
share,
shareFolder_,
toggleObsoleteCodeAlert,
updateDocumentTitle,
updateProjectChangeMark,
updateTreeOnNewProjectCreation,
warnIfUnsaved,
} from './codeworld_shared.js';
import * as Alert from './utils/alert.js';
import * as Auth from './utils/auth.js';
import * as DirTree from './utils/directoryTree.js';
import { sendHttp } from './utils/network.js';
import { onObjectPropertyChange } from './utils/object.js';
init();
function attachEventListeners() {
$('#signout').on('click', () => {
Auth.signOut(isEditorClean, clearWorkspace);
});
$('#signin').on('click', Auth.signIn);
$('#navButton').on('click', () => {
$(LAYOUT_CONTAINER_CLASSNAME).layout().toggle('west');
});
$('#newButton').on('click', newProject);
$('#newFolderButton').on('click', newFolder);
$('#deleteButton').on('click', deleteProject);
$('#saveButton').on('click', saveProject);
$('#saveAsButton').on('click', saveProjectAs);
$('#downloadButton').on('click', downloadProject);
$('#docButton').on('click', help);
$('#toggleThemeButton').on('click', toggleTheme);
$('#shareFolderButton').on('click', shareFolder);
$('#startRecButton').on('click', captureStart);
$('#stopRecButton').on('click', stopRecording);
$('#shareButton').on('click', share);
$('#inspectButton').on('click', inspect);
$('#runButton').on('click', compile);
$('#stopButton').on('click', stopRun);
$('#runner').on('load', toggleObsoleteCodeAlert);
}
function attachCustomEventListeners() {
$('#directoryTree').on(DirTree.events.SELECTION_CLEARED, () => {
$('#deleteButton').hide();
$('#saveButton').hide();
$('#shareFolderButton').hide();
$('#downloadButton').hide();
});
const $inspectButton = $('#inspectButton');
onObjectPropertyChange(window, 'debugAvailable', () => {
if (window.debugAvailable) {
$inspectButton.show();
} else {
$inspectButton.hide();
}
});
onObjectPropertyChange(window, 'debugActive', () => {
const activeClass = 'inspect-button__active';
if (window.debugActive) {
$inspectButton.addClass(activeClass);
} else {
$inspectButton.removeClass(activeClass);
}
});
onObjectPropertyChange(window, 'savedGeneration', () => {
updateDocumentTitle();
updateProjectChangeMark();
});
}
function initializeLayout() {
initializeLayoutContainer({
default: {},
west: {
initHidden: true,
minSize: 50,
enableCursorHotkey: false,
},
east: {
initHidden: true,
resizable: true,
size: 510,
enableCursorHotkey: false,
onresize: () => {
const $runner = $('#runner');
const runnerWidth = $runner.width();
$runner.css({
height: `${runnerWidth}px`,
});
},
},
});
let wasDraggingEast = false;
new MutationObserver(() => {
const isDraggingEast =
document.getElementsByClassName('ui-layout-resizer-east-dragging')
.length > 0;
const runner = $('#runner');
if (!wasDraggingEast && isDraggingEast) {
runner.css({
'pointer-events': 'none',
});
} else if (wasDraggingEast && !isDraggingEast) {
runner.css({
'pointer-events': 'auto',
});
runner.focus();
}
wasDraggingEast = isDraggingEast;
}).observe(document.querySelector('.ui-layout-container'), {
childList: true,
});
}
/*
* Initializes the programming environment. This is called after the
* entire document body and other JavaScript has loaded.
*/
async function init() {
await Alert.init();
await Auth.init(() => {
const autohelpEnabled = location.hash.length <= 2;
let isFirstSignin = true;
window.auth2.currentUser.listen(() => {
if (isFirstSignin && !Auth.signedIn() && autohelpEnabled) {
help();
}
isFirstSignin = false;
});
window.auth2.isSignedIn.listen(() => {
const layoutHandler = $(LAYOUT_CONTAINER_CLASSNAME).layout();
if (Auth.signedIn()) {
loadTreeNodes(DirTree.getRootNode());
$('#signin').hide();
$('#signout, #navButton').show();
layoutHandler.show('west');
} else {
$('#signin').show();
$(
'#signout, #saveButton, #navButton, #deleteButton, #shareFolderButton'
).hide();
layoutHandler.hide('west');
}
});
});
attachEventListeners();
attachCustomEventListeners();
initializeLayout();
// Keep the base bundle preloaded by retrying regularly.
function preloadBaseBundle() {
const request = new XMLHttpRequest();
request.open('GET', '/runBaseJS', true);
request.setRequestHeader('Cache-control', 'max-stale');
request.send();
}
preloadBaseBundle();
window.setInterval(preloadBaseBundle, 1000 * 60 * 60);
function loadProjectHandler(name, path) {
function successCallback(project) {
setCode(project.source, project.history);
}
loadProject(name, path, window.buildMode, successCallback);
}
initDirectoryTree(isEditorClean, loadProjectHandler, () => setCode(''));
window.savedGeneration = null;
window.runningGeneration = null;
window.debugAvailable = false;
window.debugActive = false;
if (window.location.pathname === '/haskell') {
window.buildMode = 'haskell';
window.projectEnv = 'haskell';
} else {
window.buildMode = 'codeworld';
window.projectEnv = 'codeworld';
}
document.documentElement.classList.add(window.buildMode);
window.cancelCompile = () => {};
window.clipboard = '';
definePanelExtension();
initCodeworld();
registerStandardHints(() => {
setMode(true);
parseSymbolsFromCurrentCode();
});
let hash = location.hash.slice(1);
if (hash.length > 0) {
if (hash.slice(-2) === '==') {
hash = hash.slice(0, -2);
}
if (hash[0] === 'F') {
sweetAlert({
title: Alert.title('Save As', 'mdi-cloud-upload'),
html: 'Enter a name for the shared folder:',
input: 'text',
confirmButtonText: 'Save',
showCancelButton: false,
}).then((result) => {
if (!result || !result.value) {
return;
}
const data = new FormData();
data.append('mode', window.buildMode);
data.append('shash', hash);
data.append('name', result.value);
sendHttp('POST', 'shareContent', data, (request) => {
window.location.hash = '';
if (request.status === 200) {
sweetAlert(
'Success!',
'The shared folder has been copied to your root directory.',
'success'
);
} else {
sweetAlert(
'Oops!',
'Could not load the shared directory. Please try again.',
'error'
);
}
loadTreeNodes(DirTree.getRootNode());
});
});
}
}
if (hash.length > 0) {
if (hash.slice(-2) === '==') {
hash = hash.slice(0, -2);
}
if (hash[0] === 'P') {
/*sendHttp(
'GET',
`loadSource?hash=${hash}&mode=${window.buildMode}`,
null,
(request) => {
if (request.status === 200) {
setCode(request.responseText, null, true);
}
}
);*/
setCode(localStorage.getItem(`${window.buildMode}-${hash}`) || '');
} else if (hash[0] !== 'F') {
setCode('');
}
} else {
if(window.buildMode === "codeworld") setCode(`import Prelude hiding (rotated, translated, colored, lettering,
scaled, polyline, Text, Number)
program = drawingOf(picture & coordinatePlane)
picture = ...
`);
}
}
function initCodeworld() {
const editor = document.getElementById('editor');
const darkMode = window.localStorage.getItem('darkMode') === 'true';
window.codeworldKeywords = {};
window.codeworldEditor = CodeMirror.fromTextArea(editor, {
mode: {
name: 'codeworld',
overrideKeywords: window.codeworldKeywords,
},
theme: darkMode ? 'ambiance' : 'default',
undoDepth: 50,
lineNumbers: true,
autofocus: true,
matchBrackets: true,
styleActiveLine: !WURFL || !WURFL.is_mobile,
showTrailingSpace: true,
indentWithTabs: false,
indentUnit: 2,
autoClearEmptyLines: true,
highlightSelectionMatches: {
showToken: /\w/,
annotateScrollbar: true,
},
rulers: [
{
column: 80,
color: '#bbb',
lineStyle: 'dashed',
},
],
extraKeys: {
'Ctrl-Space': 'autocomplete',
'Shift-Space': 'autocomplete',
Tab: 'indentMore',
'Shift-Tab': 'indentLess',
'Ctrl-Enter': compile,
'Ctrl-Up': changeFontSize(1),
'Ctrl-Down': changeFontSize(-1),
Backspace: backspace,
},
textHover: window.buildMode === 'codeworld' ? onHover : null,
gutters: ['CodeMirror-lint-markers'],
lint: {
getAnnotations: (text, callback) => {
if (text.trim() === '') {
callback([]);
return;
}
let request = null;
function cancelLintRequest() {
if (window.codeworldEditor) {
window.codeworldEditor.off('change', cancelLintRequest);
}
if (request) request.abort();
}
const data = new FormData();
data.append('source', text);
data.append('mode', window.buildMode);
request = sendHttp('POST', 'errorCheck', data, (request) => {
if (window.codeworldEditor) {
window.codeworldEditor.off('change', cancelLintRequest);
}
if (request.status === 400 || request.status === 200) {
const messages = parseCompileErrors(request.responseText);
callback(messages.filter((msg) => msg.from && msg.to));
} else if (request.status === 0) {
// Request was cancelled because of a later change. Do nothing.
} else {
console.log(
'Not expected behavior: don\'t know how to ' +
'handle request with status ',
request.status,
request
);
}
});
if (window.codeworldEditor) {
window.codeworldEditor.on('change', cancelLintRequest);
}
},
async: true,
},
buttons: [
{
class: 'cw-toolbar-button mdi mdi-file-outline',
label: '',
title: 'New',
callback: (cm) => newProject(),
},
{
class: 'cw-toolbar-button mdi mdi-file-find',
label: '',
title: 'Search',
callback: (cm) => cm.execCommand('find'),
},
{
class: 'cw-toolbar-button mdi mdi-file-replace',
label: '',
title: 'Replace',
callback: (cm) => cm.execCommand('replace'),
},
{
class: 'cw-toolbar-button mdi mdi-undo',
label: '',
title: 'Undo',
callback: (cm) => cm.undo(),
},
{
class: 'cw-toolbar-button mdi mdi-redo',
label: '',
title: 'Redo',
callback: (cm) => cm.redo(),
},
{
class: 'cw-toolbar-button mdi mdi-format-indent-increase',
label: '',
title: 'Indent',
callback: (cm) => cm.execCommand('indentMore'),
},
{
class: 'cw-toolbar-button mdi mdi-format-indent-decrease',
label: '',
title: 'Outdent',
callback: (cm) => cm.execCommand('indentLess'),
},
{
class: 'cw-toolbar-button mdi mdi-magnify-plus',
label: '',
title: 'Zoom in',
callback: (cm) => changeFontSize(1)(),
},
{
class: 'cw-toolbar-button mdi mdi-magnify-minus',
label: '',
title: 'Zoom out',
callback: (cm) => changeFontSize(-1)(),
},
{
class: 'cw-toolbar-button mdi mdi-content-cut',
label: '',
title: 'Cut',
callback: (cm) => {
if (cm.getSelection()) {
window.clipboard = cm.getSelection();
document.execCommand('copy');
cm.replaceSelection('');
}
},
},
{
class: 'cw-toolbar-button mdi mdi-content-copy',
label: '',
title: 'Copy',
callback: (cm) => {
if (cm.getSelection()) {
window.clipboard = cm.getSelection();
document.execCommand('copy');
}
},
},
{
class: 'cw-toolbar-button mdi mdi-content-paste',
label: '',
title: 'Paste',
callback: (cm) => cm.replaceSelection(window.clipboard),
},
{
class: 'cw-toolbar-button mdi mdi-stop',
label: '',
title: 'Stop',
callback: (cm) => stopRun(),
},
{
class: 'cw-toolbar-button mdi mdi-play',
label: '',
title: 'Run',
callback: (cm) => compile(),
},
{
class: 'cw-toolbar-button mdi mdi-auto-fix',
label: '',
title: 'Autocomplete',
callback: (cm) => cm.execCommand('autocomplete'),
},
],
});
CodeMirror.commands.indentMore = (cm) => changeIndent('add');
CodeMirror.commands.indentLess = (cm) => changeIndent('subtract');
window.codeworldEditor.refresh();
window.codeworldEditor.on('cursorActivity', updateArgHelp);
window.codeworldEditor.on('refresh', updateArgHelp);
if (window.localStorage.getItem('darkMode') === 'true') toggleTheme();
CodeMirror.commands.save = (cm) => {
saveProject();
};
document.onkeydown = (e) => {
if (e.ctrlKey && e.keyCode === 83) {
// Ctrl+S
saveProject();
return false;
}
if (e.ctrlKey && e.keyCode === 73) {
// Ctrl+I
formatSource();
return false;
}
};
window.reparseTimeoutId = null;
window.codeworldEditor.on('changes', ({ doc }, changes) => {
if (window.reparseTimeoutId) {
clearTimeout(window.reparseTimeoutId);
}
window.reparseTimeoutId = setTimeout(parseSymbolsFromCurrentCode, 1500);
updateDocumentTitle(isEditorClean);
updateProjectChangeMark(isEditorClean);
toggleObsoleteCodeAlert();
});
if (window.buildMode === 'codeworld') {
window.codeworldEditor.on('cursorActivity', () => {
if (window.codeworldEditor.getDoc().somethingSelected()) {
window.codeworldEditor.setOption('electricChars', false);
window.codeworldEditor.setOption('electricIndentLine', -1);
return;
}
const active = window.codeworldEditor.getOption('electricChars');
const oldLine =
window.codeworldEditor.getOption('electricIndentLine') || 0;
const line = window.codeworldEditor.getDoc().getCursor().line;
if (active || line !== oldLine) {
const { prev, smart } = getIndentsAt(line, 'smart');
window.codeworldEditor.setOption('electricChars', prev === smart);
window.codeworldEditor.setOption('electricIndentLine', line);
}
});
}
window.onbeforeunload = (event) => {
if (!isEditorClean()) {
const msg =
'There are unsaved changes to your project. ' +
'If you continue, they will be lost!';
if (event) event.returnValue = msg;
return msg;
}
};
window.onresize = () => {
if (window.resizeTimeoutId) clearTimeout(window.resizeTimeoutId);
window.resizeTimeoutId = setTimeout(() => {
window.codeworldEditor.setSize();
}, 1000);
};
}
function setCode(code, history, autostart) {
if (!window.codeworldEditor) {
return;
}
const doc = window.codeworldEditor.getDoc();
doc.setValue(code);
const nextDocGeneration = doc.changeGeneration(true);
window.savedGeneration = nextDocGeneration;
if (history) {
doc.setHistory(history);
} else {
doc.clearHistory();
}
window.codeworldEditor.focus();
parseSymbolsFromCurrentCode();
if (autostart) {
compile();
} else {
stopRun();
}
}
function isEditorClean() {
const doc = window.codeworldEditor.getDoc();
return window.savedGeneration
? doc.isClean(window.savedGeneration)
: Boolean(!doc.getValue());
}
function backspace() {
if (
window.buildMode === 'codeworld' &&
!window.codeworldEditor.somethingSelected()
) {
const cursor = window.codeworldEditor.getCursor();
const line = window.codeworldEditor.getDoc().getLine(cursor.line);
const prevIndent = /^[\s]*/.exec(line)[0].length;
if (cursor.ch > 0 && cursor.ch === prevIndent) {
// We ask the question: if this line were one space less
// indented, would this be the next indent point? If so,
// then backspace should delete the indent, rather than a
// single character.
const startToken = window.codeworldEditor.getTokenAt({
line: cursor.line,
ch: 0,
});
const smartIndent = getSmartIndent(
startToken.state,
line.slice(prevIndent),
cursor.ch - 1,
'add'
);
if (cursor.ch === smartIndent) {
window.codeworldEditor.execCommand('indentLess');
return;
}
}
}
window.codeworldEditor.execCommand('delCharBefore');
}
function changeIndent(how) {
if (window.buildMode === 'codeworld') {
const range = window.codeworldEditor.listSelections()[0];
const lineNum = Math.min(range.anchor.line, range.head.line);
const { prev, smart } = getIndentsAt(lineNum, how);
if (smart >= 0) {
window.codeworldEditor.indentSelection(smart - prev);
return;
}
}
window.codeworldEditor.indentSelection(how);
}
function getIndentsAt(lineNum, how) {
const lineStart = window.codeworldEditor.getTokenAt({
line: lineNum,
ch: 0,
});
if (!lineStart) return -1;
const line = window.codeworldEditor.getDoc().getLine(lineNum);
const prevIndent = /^[\s]*/.exec(line)[0].length;
const textAfter = line.slice(prevIndent);
return {
prev: prevIndent,
smart: getSmartIndent(lineStart.state, textAfter, prevIndent, how),
};
}
function getSmartIndent(state, textAfter, prevIndent, how) {
let dir;
switch (how) {
case 'add':
dir = {
start: 0,
end: state.contexts.length + 1,
inc: 1,
predicate: (n) => n > prevIndent,
};
break;
case 'subtract':
dir = {
start: state.contexts.length,
end: -1,
inc: -1,
predicate: (n) => n < prevIndent,
};
break;
case 'smart':
dir = {
start: state.contexts.length,
end: state.contexts.length + 1,
inc: 1,
predicate: (n) => n >= 0,
};
break;
default:
return -1;
}
const mode = window.codeworldEditor.getDoc().getMode();
for (let i = dir.start; i !== dir.end; i += dir.inc) {
const stateCopy = mode.copyState(state);
stateCopy.contexts = stateCopy.contexts.slice(0, i);
const detected = mode.indent(stateCopy, textAfter);
if (dir.predicate(detected)) return detected;
}
return -1;
}
function updateArgHelp() {
if (window.buildMode !== 'codeworld') {
return;
}
const prevDiv = document.getElementById('function-details');
if (prevDiv) prevDiv.remove();
const cursor = window.codeworldEditor.getCursor();
const currentToken = window.codeworldEditor.getTokenAt(cursor);
const functions = currentToken.state.contexts.filter(
(ctx) => ctx.functionName
);
if (!functions.length) return;
const { functionName, argIndex, ln, ch } = functions.pop();
const keywordData = window.codeWorldSymbols[functionName];
// don't show tooltip if function details or argument types are not known
if (!keywordData || keywordData.declaration === functionName) return;
const topDiv = document.createElement('div');
topDiv.title = functionName;
topDiv.id = 'function-details';
const docDiv = document.createElement('div');
docDiv.classList.add('function-tooltip-styling');
const annotation = document.createElement('div');
const returnedVal = renderDeclaration(
annotation,
keywordData,
9999,
argIndex
);
//TODO: Remove the if block once a better function parser is integrated.
if (returnedVal === null) {
annotation.remove();
topDiv.remove();
return;
}
annotation.className = 'hover-decl';
docDiv.appendChild(annotation);
topDiv.appendChild(docDiv);
const widgetPos = {
line: ln > 1 ? ln : cursor.line,
ch: ch - functionName.length,
};
window.codeworldEditor.addWidget(widgetPos, topDiv, false, 'above', 'near');
}
function captureStart() {
document.getElementById('runner').contentWindow.postMessage(
{
type: 'startRecord',
},
'*'
);
document.querySelector('#recordIcon').style.display = '';
document.querySelector('#startRecButton').style.display = 'none';
document.querySelector('#stopRecButton').style.display = '';
}
function stopRecording() {
document.getElementById('runner').contentWindow.postMessage(
{
type: 'stopRecord',
},
'*'
);
document.querySelector('#recordIcon').style.display = 'none';
document.querySelector('#startRecButton').style.display = '';
document.querySelector('#stopRecButton').style.display = 'none';
}
function setMode(force) {
if (window.buildMode === 'haskell') {
if (force || window.codeworldEditor.getMode().name !== 'haskell') {
window.codeworldEditor.setOption('mode', 'haskell');
}
} else {
if (force || window.codeworldEditor.getMode().name !== 'codeworld') {
window.codeworldEditor.setOption('mode', {
name: 'codeworld',
overrideKeywords: window.codeworldKeywords,
});
}
}
}
function toggleTheme() {
document.body.classList.toggle('dark-theme');
const dark = document.body.classList.contains('dark-theme');
window.codeworldEditor.setOption('theme', dark ? 'ambiance' : 'default');
window.localStorage.setItem('darkMode', dark);
}
function changeFontSize(incr) {
return () => {
const elem = window.codeworldEditor.getWrapperElement();
const style = window.getComputedStyle(elem);
const fontParts = style['font-size'].match(/^([0-9]+)(.*)$/);
let fontSize = 12;
let fontUnit = 'px';
if (fontParts.length >= 3) {
fontSize = parseInt(fontParts[1]);
fontUnit = fontParts[2];
}
fontSize += incr;
if (fontSize < 8) fontSize = 8;
elem.style.fontSize = fontSize + fontUnit;
elem.parentElement.style.fontSize = (4 / 3) * fontSize + fontUnit;
window.codeworldEditor.refresh();
};
}
function help() {
let url = `doc.html?shelf=help/${window.buildMode}.shelf`;
let customClass = 'helpdoc';
if (window.localStorage.getItem('darkMode') === 'true') {
url += '&theme=dark-theme';
customClass += ' dark-theme';
}
sweetAlert({
html: `<iframe id="doc" style="width: 100%; height: 100%" class="dropbox" src="${url}"></iframe>`,
customClass: customClass,
allowEscapeKey: true,
allowOutsideClick: true,
showConfirmButton: false,
}).then(() => {
const docIframe = document.getElementById('doc');
docIframe.contentWindow.savePosition();
});
}
function newProject() {
warnIfUnsaved(isEditorClean, () => {
updateTreeOnNewProjectCreation();
setCode('');
document.title = '(new) - CodeWorld';
});
}
function newFolder() {
function successCallback() {
setCode('');
}
createFolder(
isEditorClean,
getNearestDirectory(),
window.buildMode,
successCallback
);
}
function formatSource() {
if (window.buildMode === 'codeworld') {
reformatCodeWorld();
} else {
reformatHaskell();
}
}
function reformatCodeWorld() {
const { codeworldEditor } = window;
const doc = codeworldEditor.getDoc();
const getLevel = (lineNum) => {
const lineText = doc.getLine(lineNum);
const pos = {
line: lineNum,
ch: Math.min(lineText.length, /^[\s]*/.exec(lineText)[0].length + 1),
};
const token = codeworldEditor.getTokenAt(pos, true);
if (token.type === 'comment') return -1;
const isItem = (token.type || '').split(' ').indexOf('layout') >= 0;
if (isItem) {
return token.state.contexts.length;
} else {
return token.state.contexts.length + 0.5;
}
};
const oldLevel = [];
for (let line = 0; line < doc.lineCount(); ++line) {
oldLevel.push(getLevel(line));
}
for (let line = 0; line < doc.lineCount(); ++line) {
if (oldLevel[line] === -1) continue;
getLevel(line); // Forces an update to the token state.
codeworldEditor.indentLine(line);
while (getLevel(line) > oldLevel[line]) {
const { prev, smart } = getIndentsAt(line, 'subtract');
if (prev === 0) {
break;
} else if (smart >= 0 && smart !== prev) {
codeworldEditor.indentLine(line, smart - prev);
} else {
codeworldEditor.indentLine(line, 'subtract');
}
}
while (getLevel(line) < oldLevel[line]) {
const { prev, smart } = getIndentsAt(line, 'add');
if (smart >= 0 && smart !== prev) {
codeworldEditor.indentLine(line, smart - prev);
} else {
codeworldEditor.indentLine(line, 'add');
}
}
}
}
function reformatHaskell() {
const { codeworldEditor, buildMode } = window;
const doc = codeworldEditor.getDoc();
const src = doc.getValue();
const data = new FormData();
data.append('source', src);
data.append('mode', buildMode);
sendHttp('POST', 'indent', data, (request) => {
if (request.status === 200) {
const reformattedSrc = request.responseText;
if (reformattedSrc !== src) {
let index = 0;
const diffs = Diff.diffChars(src, reformattedSrc);
for (let i = 0; i < diffs.length; i++) {
const { value, count, added, removed } = diffs[i];
if (added) {
const pos = doc.posFromIndex(index);
doc.replaceRange(value, pos, null, '+format');
index += count;
} else if (removed) {
const fromPos = doc.posFromIndex(index);
const toPos = doc.posFromIndex(index + count);
doc.replaceRange('', fromPos, toPos, '+format');
} else {
index += count;
}
}
}
} else if (request.status === 500) {
sweetAlert(
'Oops!',
'Could not format your code. It may contains errors.',
'error'
);
}
});
}
window.addEventListener('message', (event) => {