CasperSecurity
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<title>CodeMirror: Code Folding Demo</title>
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color: red;
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<a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../html/logo.png"></a>
<ul>
<li><a href="../index.html">Home</a>
<li><a href="../html/manual.html">Manual</a>
<li><a href="https://github.com/codemirror/codemirror">Code</a>
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<ul>
<li><a class=active href="#">Code Folding</a>
</ul>
</div>
<article>
<h2>Code Folding Demo</h2>
<form>
<div style="max-width: 50em; margin-bottom: 1em">JavaScript:<br>
<textarea id="code" name="code"></textarea></div>
<div style="max-width: 50em; margin-bottom: 1em">HTML:<br>
<textarea id="code-html" name="code-html"></textarea></div>
<div style="max-width: 50em; margin-bottom: 1em">JSON with custom widget:<br>
<textarea id="code-json" name="code-json">
{
"menu": {
"id": "file",
"value": "File",
"popup": {
"menuitem": [
{"value": "New", "onclick": "CreateNewDoc()"},
{"value": "Open", "onclick": "OpenDoc()"},
{"value": "Close", "onclick": "CloseDoc()"}
]
}
}
}
</textarea></div>
<div style="max-width: 50em">Python:<br>
<textarea id="code-python" name="code">
def foo():
do_some_stuff()
here
return None
class Bar:
__init__(self):
if True:
print("True")
else:
print("False")
this_code_makes_no_sense():
pass
# A comment</textarea></div>
<div style="max-width: 50em">Markdown:<br>
<textarea id="code-markdown" name="code"></textarea></div>
</form>
<script id="script">
/*
* Demonstration of code folding
*/
window.onload = function() {
var te = document.getElementById("code");
var sc = document.getElementById("script");
te.value = (sc.textContent || sc.innerText || sc.innerHTML).replace(/^\s*/, "");
sc.innerHTML = "";
var te_html = document.getElementById("code-html");
te_html.value = document.documentElement.innerHTML;
var te_python = document.getElementById("code-python");
var te_markdown = document.getElementById("code-markdown");
te_markdown.value = "# Foo\n## Bar\n\nblah blah\n\n## Baz\n\nblah blah\n\n# Quux\n\nblah blah\n"
var te_json = document.getElementById("code-json");
window.editor = CodeMirror.fromTextArea(te, {
mode: "javascript",
lineNumbers: true,
lineWrapping: true,
extraKeys: {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
foldGutter: true,
gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"]
});
editor.foldCode(CodeMirror.Pos(13, 0));
window.editor_json = CodeMirror.fromTextArea(te_json, {
mode: {name: "javascript", json: true},
lineNumbers: true,
lineWrapping: true,
extraKeys: {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
foldGutter: true,
gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"],
foldOptions: {
widget: (from, to) => {
var count = undefined;
// Get open / close token
var startToken = '{', endToken = '}';
var prevLine = window.editor_json.getLine(from.line);
if (prevLine.lastIndexOf('[') > prevLine.lastIndexOf('{')) {
startToken = '[', endToken = ']';
}
// Get json content
var internal = window.editor_json.getRange(from, to);
var toParse = startToken + internal + endToken;
// Get key count
try {
var parsed = JSON.parse(toParse);
count = Object.keys(parsed).length;
} catch(e) { }
return count ? `\u21A4${count}\u21A6` : '\u2194';
}
}
});
editor_json.foldCode(CodeMirror.Pos(5, 0));
window.editor_html = CodeMirror.fromTextArea(te_html, {
mode: "text/html",
lineNumbers: true,
lineWrapping: true,
extraKeys: {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
foldGutter: true,
gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"]
});
editor_html.foldCode(CodeMirror.Pos(0, 0));
editor_html.foldCode(CodeMirror.Pos(34, 0));
window.editor_python = CodeMirror.fromTextArea(te_python, {
mode: "python",
lineNumbers: true,
extraKeys: {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
foldGutter: true,
gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"]
});
window.editor_markdown = CodeMirror.fromTextArea(te_markdown, {
mode: "markdown",
lineNumbers: true,
lineWrapping: true,
extraKeys: {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
foldGutter: true,
gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"]
});
};
</script>
</article>
</body>