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move a few things away in to-be-integrated/
[myslice.git] / to-be-integrated / third-party / codemirror-3.15 / demo / btree.html
diff --git a/to-be-integrated/third-party/codemirror-3.15/demo/btree.html b/to-be-integrated/third-party/codemirror-3.15/demo/btree.html
new file mode 100644 (file)
index 0000000..5e5ce0a
--- /dev/null
+++ b/to-be-integrated/third-party/codemirror-3.15/demo/btree.html
@@ -0,0 +1,87 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>CodeMirror: B-Tree visualization</title>
+    <link rel="stylesheet" href="../lib/codemirror.css">
+    <script src="../lib/codemirror.js"></script>
+    <link rel="stylesheet" href="../doc/docs.css">
+
+    <style type="text/css">
+      .lineblock { display: inline-block; margin: 1px; height: 5px; }
+      .CodeMirror {border: 1px solid #aaa; height: 400px}
+    </style>
+  </head>
+  <body>
+    <h1>CodeMirror: B-Tree visualization</h1>
+
+    <p>Shows a visual representation of the b-tree that CodeMirror
+    uses to store its document. See
+    the <a href="http://marijnhaverbeke.nl/blog/codemirror-line-tree.html">corresponding
+    blog post</a> for a description of this format. The gray blocks
+    under each leaf show the lines it holds (with their width
+    representing the line height). Add and remove content to see how
+    the nodes are split and merged to keep the tree balanced.</p>
+
+    <div style="position: relative">
+      <div style="width: 60%; display: inline-block; vertical-align: top">
+        <form><textarea id="code" name="code">type here, see a summary of the document b-tree to the right</textarea></form>
+      </div>
+      <div style="display: inline-block; height: 402px; overflow-y: auto" id="output"></div>
+    </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;
+                          console.log(line.height, line);
+        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>
+
+  </body>
+</html>
myslice (django)