// 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"; var GUTT_CLASS = "CodeMirror-activeline-gutter"; 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); cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_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.addLineClass(active[i], "gutter", GUTT_CLASS); } cm.state.activeLines = active; }); } function selectionChange(cm, sel) { updateActiveLines(cm, sel.ranges); } });