mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-25 23:08:41 +00:00
86 lines
2.9 KiB
HTML
86 lines
2.9 KiB
HTML
|
<!doctype html>
|
||
|
|
|
||
|
|
<title>CodeMirror: Automatically derive odd wrapping behavior for your browser</title>
|
||
|
|
<meta charset="utf-8"/>
|
||
|
|
<link rel=stylesheet href="../doc/docs.css">
|
||
|
|
|
||
|
|
<div id=nav>
|
||
|
|
<a href="http://codemirror.net"><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/marijnh/codemirror">Code</a>
|
||
|
|
</ul>
|
||
|
|
<ul>
|
||
|
|
<li><a class=active href="#">Automatically derive odd wrapping behavior for your browser</a>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<article>
|
||
|
|
<h2>Automatically derive odd wrapping behavior for your browser</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p>This is a hack to automatically derive
|
||
|
|
a <code>spanAffectsWrapping</code> regexp for a browser. See the
|
||
|
|
comments above that variable
|
||
|
|
in <a href="../lib/codemirror.js"><code>lib/codemirror.js</code></a>
|
||
|
|
for some more details.</p>
|
||
|
|
|
||
|
|
<div style="white-space: pre-wrap; width: 50px;" id="area"></div>
|
||
|
|
<pre id="output"></pre>
|
||
|
|
|
||
|
|
<script id="script">
|
||
|
|
var a = document.getElementById("area"), bad = Object.create(null);
|
||
|
|
var chars = "a~`!@#$%^&*()-_=+}{[]\\|'\"/?.>,<:;", l = chars.length;
|
||
|
|
for (var x = 0; x < l; ++x) for (var y = 0; y < l; ++y) {
|
||
|
|
var s1 = "foooo" + chars.charAt(x), s2 = chars.charAt(y) + "br";
|
||
|
|
a.appendChild(document.createTextNode(s1 + s2));
|
||
|
|
var h1 = a.offsetHeight;
|
||
|
|
a.innerHTML = "";
|
||
|
|
a.appendChild(document.createElement("span")).appendChild(document.createTextNode(s1));
|
||
|
|
a.appendChild(document.createElement("span")).appendChild(document.createTextNode(s2));
|
||
|
|
if (a.offsetHeight != h1)
|
||
|
|
bad[chars.charAt(x)] = (bad[chars.charAt(x)] || "") + chars.charAt(y);
|
||
|
|
a.innerHTML = "";
|
||
|
|
}
|
||
|
|
|
||
|
|
var re = "";
|
||
|
|
function toREElt(str) {
|
||
|
|
if (str.length > 1) {
|
||
|
|
var invert = false;
|
||
|
|
if (str.length > chars.length * .6) {
|
||
|
|
invert = true;
|
||
|
|
var newStr = "";
|
||
|
|
for (var i = 0; i < l; ++i) if (str.indexOf(chars.charAt(i)) == -1) newStr += chars.charAt(i);
|
||
|
|
str = newStr;
|
||
|
|
}
|
||
|
|
str = str.replace(/[\-\.\]\"\'\\\/\^a]/g, function(orig) { return orig == "a" ? "\\w" : "\\" + orig; });
|
||
|
|
return "[" + (invert ? "^" : "") + str + "]";
|
||
|
|
} else if (str == "a") {
|
||
|
|
return "\\w";
|
||
|
|
} else if (/[?$*()+{}[\]\.|/\'\"]/.test(str)) {
|
||
|
|
return "\\" + str;
|
||
|
|
} else {
|
||
|
|
return str;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var newRE = "";
|
||
|
|
for (;;) {
|
||
|
|
var left = null;
|
||
|
|
for (var left in bad) break;
|
||
|
|
if (left == null) break;
|
||
|
|
var right = bad[left];
|
||
|
|
delete bad[left];
|
||
|
|
for (var other in bad) if (bad[other] == right) {
|
||
|
|
left += other;
|
||
|
|
delete bad[other];
|
||
|
|
}
|
||
|
|
newRE += (newRE ? "|" : "") + toREElt(left) + toREElt(right);
|
||
|
|
}
|
||
|
|
|
||
|
|
document.getElementById("output").appendChild(document.createTextNode("Your regexp is: " + (newRE || "^$")));
|
||
|
|
</script>
|
||
|
|
</article>
|