mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-29 23:46:21 +00:00
96d4a3ecf7
Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
// CodeMirror, copyright (c) by Marijn Haverbeke and others
|
|
// Distributed under an MIT license: http://codemirror.net/LICENSE
|
|
|
|
(function(mod) {
|
|
if (typeof exports == "object" && typeof module == "object") // CommonJS
|
|
mod(require("../../lib/codemirror"));
|
|
else if (typeof define == "function" && define.amd) // AMD
|
|
define(["../../lib/codemirror"], mod);
|
|
else // Plain browser env
|
|
mod(CodeMirror);
|
|
})(function(CodeMirror) {
|
|
CodeMirror.defineOption("placeholder", "", function(cm, val, old) {
|
|
var prev = old && old != CodeMirror.Init;
|
|
if (val && !prev) {
|
|
cm.on("blur", onBlur);
|
|
cm.on("change", onChange);
|
|
onChange(cm);
|
|
} else if (!val && prev) {
|
|
cm.off("blur", onBlur);
|
|
cm.off("change", onChange);
|
|
clearPlaceholder(cm);
|
|
var wrapper = cm.getWrapperElement();
|
|
wrapper.className = wrapper.className.replace(" CodeMirror-empty", "");
|
|
}
|
|
|
|
if (val && !cm.hasFocus()) onBlur(cm);
|
|
});
|
|
|
|
function clearPlaceholder(cm) {
|
|
if (cm.state.placeholder) {
|
|
cm.state.placeholder.parentNode.removeChild(cm.state.placeholder);
|
|
cm.state.placeholder = null;
|
|
}
|
|
}
|
|
function setPlaceholder(cm) {
|
|
clearPlaceholder(cm);
|
|
var elt = cm.state.placeholder = document.createElement("pre");
|
|
elt.style.cssText = "height: 0; overflow: visible";
|
|
elt.className = "CodeMirror-placeholder";
|
|
elt.appendChild(document.createTextNode(cm.getOption("placeholder")));
|
|
cm.display.lineSpace.insertBefore(elt, cm.display.lineSpace.firstChild);
|
|
}
|
|
|
|
function onBlur(cm) {
|
|
if (isEmpty(cm)) setPlaceholder(cm);
|
|
}
|
|
function onChange(cm) {
|
|
var wrapper = cm.getWrapperElement(), empty = isEmpty(cm);
|
|
wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "");
|
|
|
|
if (empty) setPlaceholder(cm);
|
|
else clearPlaceholder(cm);
|
|
}
|
|
|
|
function isEmpty(cm) {
|
|
return (cm.lineCount() === 1) && (cm.getLine(0) === "");
|
|
}
|
|
});
|