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comparison .cms/lib/codemirror/demo/btree.html @ 0:78edf6b517a0 draft

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24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
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-1:000000000000 0:78edf6b517a0
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>