Created
May 14, 2018 19:11
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Rich text editor sketch
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Rich text editor demo</title> | |
| <script src="./rich.js" defer></script> | |
| <style> | |
| #editor[contentEditable=true] { | |
| padding: 0.5em; | |
| margin: 1em; | |
| } | |
| #editor[contentEditable=true] { | |
| background-color: #ffc; | |
| border: 1px solid #ccc; | |
| } | |
| #tools { | |
| margin: 1em; | |
| } | |
| #tools span { | |
| display: inline-block; | |
| border-radius: 0.25em; | |
| margin: 0.1em 0.25em; | |
| padding: 0.25em; | |
| color: #ccc; | |
| cursor: not-allowed; | |
| } | |
| #tools span.separator { | |
| color: black; | |
| } | |
| #tools .enabled { | |
| color: black; | |
| cursor: pointer; | |
| } | |
| #tools .active { | |
| background-color: #aaa; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Rich text editor demo</h1> | |
| <div id="tools"></div> | |
| <div id="editor"><p>Hello, wonderful world!</p></div> | |
| </body> | |
| </html> |
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| (function () { | |
| 'use strict'; | |
| var toolbar = ['bold', 'italic', 'strikeThrough', 'underline', '|', 'subscript', 'superscript', '|', 'increaseFontSize', 'decreaseFontSize', '|', | |
| 'createLink', 'unlink', '|', 'insertParagraph', 'insertOrderedList', 'insertUnorderedList', 'insertImage', 'insertHorizontalRule', 'insertHTML', 'insertText', '|', | |
| 'undo', 'redo', 'copy', 'cut', 'delete', 'forwardDelete', 'paste', 'selectAll', '|', 'foreColor', 'backColor', 'hiliteColor', 'fontName', 'fontSize', 'heading', '|', | |
| 'indent', 'outdent', 'justifyRight', 'justifyCenter', 'justifyLeft', 'justifyFull', '|', 'formatBlock', 'removeFormat']; | |
| var commandDict = {}; | |
| function refreshState () { | |
| toolbar.filter(function (cmd) { return cmd !== '|'; }).forEach(function (cmd) { | |
| var supported = document.queryCommandSupported(cmd), | |
| enabled = document.queryCommandEnabled(cmd), | |
| state = document.queryCommandState(cmd); | |
| commandDict[cmd] = (supported ? 1 : 0) + (enabled ? 2 : 0) + (state ? 4 : 0); | |
| }); | |
| } | |
| function updateState (selector) { | |
| refreshState(); | |
| Array.prototype.slice.call(document.querySelector(selector).querySelectorAll('[command]')).forEach(function (element) { | |
| var cmd = element.getAttribute('command'); | |
| if (!isNaN(commandDict[cmd])) { | |
| if (commandDict[cmd] & 1) { | |
| element.classList.remove('unsupported'); | |
| element.classList.add('supported'); | |
| } else { | |
| element.classList.remove('supported'); | |
| element.classList.add('unsupported'); | |
| } | |
| if (commandDict[cmd] & 2) { | |
| element.classList.remove('disabled'); | |
| element.classList.add('enabled'); | |
| } else { | |
| element.classList.remove('enabled'); | |
| element.classList.add('disabled'); | |
| } | |
| if (commandDict[cmd] & 4) { | |
| element.classList.remove('inactive'); | |
| element.classList.add('active'); | |
| } else { | |
| element.classList.remove('active'); | |
| element.classList.add('inactive'); | |
| } | |
| } | |
| }); | |
| } | |
| document.addEventListener('DOMContentLoaded', function () { | |
| // setup tools | |
| refreshState(); | |
| var tools = document.getElementById('tools'), nonEmptyTool = false; | |
| toolbar.forEach(function (cmd) { | |
| if (cmd === '|') { | |
| if (nonEmptyTool) { | |
| nonEmptyTool = false; | |
| var tool = document.createElement('span'); | |
| tool.className = 'separator'; | |
| tool.appendChild(document.createTextNode('|')); | |
| tools.appendChild(tool); | |
| } | |
| return; | |
| } | |
| if (!(commandDict[cmd] & 1)) { | |
| return; | |
| } | |
| nonEmptyTool = true; | |
| var tool = document.createElement('span'); | |
| tool.setAttribute('command', cmd); | |
| tool.classList.add(commandDict[cmd] & 2 ? 'enabled' : 'disabled'); | |
| tool.classList.add(commandDict[cmd] & 4 ? 'active' : 'inactive'); | |
| tool.appendChild(document.createTextNode(cmd)); | |
| tools.appendChild(tool); | |
| }); | |
| if (commandDict.styleWithCSS & 1) { | |
| document.execCommand('styleWithCSS', false, 'true'); | |
| } | |
| if (commandDict.defaultParagraphSeparator & 1) { | |
| document.execCommand('defaultParagraphSeparator', false, 'p'); | |
| } | |
| tools.addEventListener('mousedown', function (evt) { | |
| evt.stopPropagation(); | |
| evt.preventDefault(); | |
| for (var element = evt.target; element !== tools; element = element.parentElement) { | |
| if (element.getAttribute) { | |
| var cmd = element.getAttribute('command'); | |
| if (cmd) { | |
| if (element.classList.contains('enabled')) { | |
| document.execCommand(cmd, false, null); | |
| updateState('#tools'); | |
| } | |
| break; | |
| } | |
| } | |
| } | |
| }); | |
| // setup the editor | |
| var editor = document.getElementById('editor'); | |
| editor.contentEditable = 'true'; | |
| editor.addEventListener('click', function () { updateState('#tools'); }); | |
| editor.addEventListener('focus', function () { updateState('#tools'); }); | |
| editor.addEventListener('keyup', function () { updateState('#tools'); }); | |
| }); | |
| })(); |
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