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// CodeMirror, copyright (c) by Marijn Haverbeke and others |
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// Distributed under an MIT license: http://codemirror.net/LICENSE |
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|
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(function(mod) { |
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if (typeof exports == "object" && typeof module == "object") // CommonJS |
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mod(require("../../lib/codemirror")); |
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else if (typeof define == "function" && define.amd) // AMD |
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define(["../../lib/codemirror"], mod); |
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else // Plain browser env |
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mod(CodeMirror); |
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})(function(CodeMirror) { |
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"use strict"; |
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var WRAP_CLASS = "CodeMirror-activeline"; |
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var BACK_CLASS = "CodeMirror-activeline-background"; |
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var GUTT_CLASS = "CodeMirror-activeline-gutter"; |
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|
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CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) { |
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var prev = old == CodeMirror.Init ? false : old; |
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if (val == prev) return |
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if (prev) { |
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cm.off("beforeSelectionChange", selectionChange); |
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clearActiveLines(cm); |
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delete cm.state.activeLines; |
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} |
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if (val) { |
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cm.state.activeLines = []; |
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updateActiveLines(cm, cm.listSelections()); |
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cm.on("beforeSelectionChange", selectionChange); |
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} |
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}); |
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|
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function clearActiveLines(cm) { |
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for (var i = 0; i < cm.state.activeLines.length; i++) { |
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cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS); |
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cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS); |
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cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS); |
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} |
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} |
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|
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function sameArray(a, b) { |
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if (a.length != b.length) return false; |
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for (var i = 0; i < a.length; i++) |
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if (a[i] != b[i]) return false; |
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return true; |
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} |
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|
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function updateActiveLines(cm, ranges) { |
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var active = []; |
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for (var i = 0; i < ranges.length; i++) { |
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var range = ranges[i]; |
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var option = cm.getOption("styleActiveLine"); |
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if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty()) |
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continue |
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var line = cm.getLineHandleVisualStart(range.head.line); |
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if (active[active.length - 1] != line) active.push(line); |
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} |
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if (sameArray(cm.state.activeLines, active)) return; |
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cm.operation(function() { |
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clearActiveLines(cm); |
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for (var i = 0; i < active.length; i++) { |
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cm.addLineClass(active[i], "wrap", WRAP_CLASS); |
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cm.addLineClass(active[i], "background", BACK_CLASS); |
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cm.addLineClass(active[i], "gutter", GUTT_CLASS); |
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} |
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cm.state.activeLines = active; |
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}); |
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} |
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|
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function selectionChange(cm, sel) { |
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updateActiveLines(cm, sel.ranges); |
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} |
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}); |
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