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diff .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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/demo/btree.html Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,83 @@ +<!doctype html> + +<title>CodeMirror: B-Tree visualization</title> +<meta charset="utf-8"/> +<link rel=stylesheet href="../doc/docs.css"> + +<link rel="stylesheet" href="../lib/codemirror.css"> +<script src="../lib/codemirror.js"></script> +<style> + .lineblock { display: inline-block; margin: 1px; height: 5px; } + .CodeMirror {border: 1px solid #aaa; height: 400px} + </style> +<div id=nav> + <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a> + + <ul> + <li><a href="../index.html">Home</a> + <li><a href="../doc/manual.html">Manual</a> + <li><a href="https://github.com/codemirror/codemirror5">Code</a> + </ul> + <ul> + <li><a class=active href="#">B-Tree visualization</a> + </ul> +</div> + +<article> +<h2>B-Tree visualization</h2> +<form><textarea id="code" name="code">type here, see a summary of the document b-tree below</textarea></form> + <div style="display: inline-block; height: 402px; overflow-y: auto" id="output"></div> + + <script id="me"> +var editor = CodeMirror.fromTextArea(document.getElementById("code"), { + lineNumbers: true, + lineWrapping: true +}); +var updateTimeout; +editor.on("change", function(cm) { + clearTimeout(updateTimeout); + updateTimeout = setTimeout(updateVisual, 200); +}); +updateVisual(); + +function updateVisual() { + var out = document.getElementById("output"); + out.innerHTML = ""; + + function drawTree(out, node) { + if (node.lines) { + out.appendChild(document.createElement("div")).innerHTML = + "<b>leaf</b>: " + node.lines.length + " lines, " + Math.round(node.height) + " px"; + var lines = out.appendChild(document.createElement("div")); + lines.style.lineHeight = "6px"; lines.style.marginLeft = "10px"; + for (var i = 0; i < node.lines.length; ++i) { + var line = node.lines[i], lineElt = lines.appendChild(document.createElement("div")); + lineElt.className = "lineblock"; + var gray = Math.min(line.text.length * 3, 230), col = gray.toString(16); + if (col.length == 1) col = "0" + col; + lineElt.style.background = "#" + col + col + col; + lineElt.style.width = Math.max(Math.round(line.height / 3), 1) + "px"; + } + } else { + out.appendChild(document.createElement("div")).innerHTML = + "<b>node</b>: " + node.size + " lines, " + Math.round(node.height) + " px"; + var sub = out.appendChild(document.createElement("div")); + sub.style.paddingLeft = "20px"; + for (var i = 0; i < node.children.length; ++i) + drawTree(sub, node.children[i]); + } + } + drawTree(out, editor.getDoc()); +} + +function fillEditor() { + var sc = document.getElementById("me"); + var doc = (sc.textContent || sc.innerText || sc.innerHTML).replace(/^\s*/, "") + "\n"; + doc += doc; doc += doc; doc += doc; doc += doc; doc += doc; doc += doc; + editor.setValue(doc); +} + </script> + +<p><button onclick="fillEditor()">Add a lot of content</button></p> + + </article>