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diff .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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--- /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>