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1 <!doctype html>
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2
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3 <title>CodeMirror: Multiple Buffer & Split View Demo</title>
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4 <meta charset="utf-8"/>
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5 <link rel=stylesheet href="../doc/docs.css">
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6
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7 <link rel="stylesheet" href="../lib/codemirror.css">
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8 <script src="../lib/codemirror.js"></script>
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9 <script src="../mode/javascript/javascript.js"></script>
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10 <script src="../mode/css/css.js"></script>
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11 <style id=style>
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12 .CodeMirror {border: 1px solid black; height: 250px;}
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13 </style>
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14 <div id=nav>
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15 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a>
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16
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17 <ul>
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18 <li><a href="../index.html">Home</a>
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19 <li><a href="../doc/manual.html">Manual</a>
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20 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
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21 </ul>
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22 <ul>
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23 <li><a class=active href="#">Multiple Buffer & Split View</a>
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24 </ul>
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25 </div>
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26
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27 <article>
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28 <h2>Multiple Buffer & Split View Demo</h2>
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29
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30
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31 <div id=code_top></div>
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32 <div>
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33 Select buffer: <select id=buffers_top></select>
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34 <button onclick="newBuf('top')">New buffer</button>
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35 </div>
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36 <div id=code_bot></div>
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37 <div>
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38 Select buffer: <select id=buffers_bot></select>
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39 <button onclick="newBuf('bot')">New buffer</button>
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40 </div>
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41
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42 <script id=script>
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43 var sel_top = document.getElementById("buffers_top");
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44 CodeMirror.on(sel_top, "change", function() {
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45 selectBuffer(ed_top, sel_top.options[sel_top.selectedIndex].value);
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46 });
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47
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48 var sel_bot = document.getElementById("buffers_bot");
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49 CodeMirror.on(sel_bot, "change", function() {
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50 selectBuffer(ed_bot, sel_bot.options[sel_bot.selectedIndex].value);
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51 });
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52
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53 var buffers = {};
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54
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55 function openBuffer(name, text, mode) {
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56 buffers[name] = CodeMirror.Doc(text, mode);
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57 var opt = document.createElement("option");
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58 opt.appendChild(document.createTextNode(name));
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59 sel_top.appendChild(opt);
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60 sel_bot.appendChild(opt.cloneNode(true));
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61 }
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62
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63 function newBuf(where) {
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64 var name = prompt("Name for the buffer", "*scratch*");
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65 if (name == null) return;
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66 if (buffers.hasOwnProperty(name)) {
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67 alert("There's already a buffer by that name.");
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68 return;
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69 }
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70 openBuffer(name, "", "javascript");
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71 selectBuffer(where == "top" ? ed_top : ed_bot, name);
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72 var sel = where == "top" ? sel_top : sel_bot;
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73 sel.value = name;
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74 }
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75
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76 function selectBuffer(editor, name) {
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77 var buf = buffers[name];
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78 if (buf.getEditor()) buf = buf.linkedDoc({sharedHist: true});
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79 var old = editor.swapDoc(buf);
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80 var linked = old.iterLinkedDocs(function(doc) {linked = doc;});
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81 if (linked) {
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82 // Make sure the document in buffers is the one the other view is looking at
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83 for (var name in buffers) if (buffers[name] == old) buffers[name] = linked;
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84 old.unlinkDoc(linked);
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85 }
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86 editor.focus();
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87 }
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88
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89 function nodeContent(id) {
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90 var node = document.getElementById(id), val = node.textContent || node.innerText;
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91 val = val.slice(val.match(/^\s*/)[0].length, val.length - val.match(/\s*$/)[0].length) + "\n";
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92 return val;
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93 }
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94 openBuffer("js", nodeContent("script"), "javascript");
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95 openBuffer("css", nodeContent("style"), "css");
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96
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97 var ed_top = CodeMirror(document.getElementById("code_top"), {lineNumbers: true});
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98 selectBuffer(ed_top, "js");
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99 var ed_bot = CodeMirror(document.getElementById("code_bot"), {lineNumbers: true});
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100 selectBuffer(ed_bot, "js");
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101 </script>
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102
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103 <p>Demonstration of
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104 using <a href="../doc/manual.html#linkedDoc">linked documents</a>
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105 to provide a split view on a document, and
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106 using <a href="../doc/manual.html#swapDoc"><code>swapDoc</code></a>
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107 to use a single editor to display multiple documents.</p>
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108
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109 </article>
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