mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-12-26 02:21:51 +00:00
72 lines
2.4 KiB
JavaScript
72 lines
2.4 KiB
JavaScript
|
// CodeMirror, copyright (c) by Marijn Haverbeke and others
|
||
|
|
// Distributed under an MIT license: http://codemirror.net/LICENSE
|
||
|
|
|
||
|
|
// Because sometimes you need to style the cursor's line.
|
||
|
|
//
|
||
|
|
// Adds an option 'styleActiveLine' which, when enabled, gives the
|
||
|
|
// active line's wrapping <div> the CSS class "CodeMirror-activeline",
|
||
|
|
// and gives its background <div> the class "CodeMirror-activeline-background".
|
||
|
|
|
||
|
|
(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) {
|
||
|
|
"use strict";
|
||
|
|
var WRAP_CLASS = "CodeMirror-activeline";
|
||
|
|
var BACK_CLASS = "CodeMirror-activeline-background";
|
||
|
|
|
||
|
|
CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
|
||
|
|
var prev = old && old != CodeMirror.Init;
|
||
|
|
if (val && !prev) {
|
||
|
|
cm.state.activeLines = [];
|
||
|
|
updateActiveLines(cm, cm.listSelections());
|
||
|
|
cm.on("beforeSelectionChange", selectionChange);
|
||
|
|
} else if (!val && prev) {
|
||
|
|
cm.off("beforeSelectionChange", selectionChange);
|
||
|
|
clearActiveLines(cm);
|
||
|
|
delete cm.state.activeLines;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
function clearActiveLines(cm) {
|
||
|
|
for (var i = 0; i < cm.state.activeLines.length; i++) {
|
||
|
|
cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
|
||
|
|
cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function sameArray(a, b) {
|
||
|
|
if (a.length != b.length) return false;
|
||
|
|
for (var i = 0; i < a.length; i++)
|
||
|
|
if (a[i] != b[i]) return false;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
function updateActiveLines(cm, ranges) {
|
||
|
|
var active = [];
|
||
|
|
for (var i = 0; i < ranges.length; i++) {
|
||
|
|
var range = ranges[i];
|
||
|
|
if (!range.empty()) continue;
|
||
|
|
var line = cm.getLineHandleVisualStart(range.head.line);
|
||
|
|
if (active[active.length - 1] != line) active.push(line);
|
||
|
|
}
|
||
|
|
if (sameArray(cm.state.activeLines, active)) return;
|
||
|
|
cm.operation(function() {
|
||
|
|
clearActiveLines(cm);
|
||
|
|
for (var i = 0; i < active.length; i++) {
|
||
|
|
cm.addLineClass(active[i], "wrap", WRAP_CLASS);
|
||
|
|
cm.addLineClass(active[i], "background", BACK_CLASS);
|
||
|
|
}
|
||
|
|
cm.state.activeLines = active;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function selectionChange(cm, sel) {
|
||
|
|
updateActiveLines(cm, sel.ranges);
|
||
|
|
}
|
||
|
|
});
|