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comparison .cms/lib/codemirror/demo/btree.html @ 0:78edf6b517a0 draft
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author | Coffee CMS <info@coffee-cms.ru> |
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date | Fri, 11 Oct 2024 22:40:23 +0000 |
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-1:000000000000 | 0:78edf6b517a0 |
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1 <!doctype html> | |
2 | |
3 <title>CodeMirror: B-Tree visualization</title> | |
4 <meta charset="utf-8"/> | |
5 <link rel=stylesheet href="../doc/docs.css"> | |
6 | |
7 <link rel="stylesheet" href="../lib/codemirror.css"> | |
8 <script src="../lib/codemirror.js"></script> | |
9 <style> | |
10 .lineblock { display: inline-block; margin: 1px; height: 5px; } | |
11 .CodeMirror {border: 1px solid #aaa; height: 400px} | |
12 </style> | |
13 <div id=nav> | |
14 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a> | |
15 | |
16 <ul> | |
17 <li><a href="../index.html">Home</a> | |
18 <li><a href="../doc/manual.html">Manual</a> | |
19 <li><a href="https://github.com/codemirror/codemirror5">Code</a> | |
20 </ul> | |
21 <ul> | |
22 <li><a class=active href="#">B-Tree visualization</a> | |
23 </ul> | |
24 </div> | |
25 | |
26 <article> | |
27 <h2>B-Tree visualization</h2> | |
28 <form><textarea id="code" name="code">type here, see a summary of the document b-tree below</textarea></form> | |
29 <div style="display: inline-block; height: 402px; overflow-y: auto" id="output"></div> | |
30 | |
31 <script id="me"> | |
32 var editor = CodeMirror.fromTextArea(document.getElementById("code"), { | |
33 lineNumbers: true, | |
34 lineWrapping: true | |
35 }); | |
36 var updateTimeout; | |
37 editor.on("change", function(cm) { | |
38 clearTimeout(updateTimeout); | |
39 updateTimeout = setTimeout(updateVisual, 200); | |
40 }); | |
41 updateVisual(); | |
42 | |
43 function updateVisual() { | |
44 var out = document.getElementById("output"); | |
45 out.innerHTML = ""; | |
46 | |
47 function drawTree(out, node) { | |
48 if (node.lines) { | |
49 out.appendChild(document.createElement("div")).innerHTML = | |
50 "<b>leaf</b>: " + node.lines.length + " lines, " + Math.round(node.height) + " px"; | |
51 var lines = out.appendChild(document.createElement("div")); | |
52 lines.style.lineHeight = "6px"; lines.style.marginLeft = "10px"; | |
53 for (var i = 0; i < node.lines.length; ++i) { | |
54 var line = node.lines[i], lineElt = lines.appendChild(document.createElement("div")); | |
55 lineElt.className = "lineblock"; | |
56 var gray = Math.min(line.text.length * 3, 230), col = gray.toString(16); | |
57 if (col.length == 1) col = "0" + col; | |
58 lineElt.style.background = "#" + col + col + col; | |
59 lineElt.style.width = Math.max(Math.round(line.height / 3), 1) + "px"; | |
60 } | |
61 } else { | |
62 out.appendChild(document.createElement("div")).innerHTML = | |
63 "<b>node</b>: " + node.size + " lines, " + Math.round(node.height) + " px"; | |
64 var sub = out.appendChild(document.createElement("div")); | |
65 sub.style.paddingLeft = "20px"; | |
66 for (var i = 0; i < node.children.length; ++i) | |
67 drawTree(sub, node.children[i]); | |
68 } | |
69 } | |
70 drawTree(out, editor.getDoc()); | |
71 } | |
72 | |
73 function fillEditor() { | |
74 var sc = document.getElementById("me"); | |
75 var doc = (sc.textContent || sc.innerText || sc.innerHTML).replace(/^\s*/, "") + "\n"; | |
76 doc += doc; doc += doc; doc += doc; doc += doc; doc += doc; doc += doc; | |
77 editor.setValue(doc); | |
78 } | |
79 </script> | |
80 | |
81 <p><button onclick="fillEditor()">Add a lot of content</button></p> | |
82 | |
83 </article> |