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// Because sometimes you need to style the cursor's line. |
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// |
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// Adds an option 'styleActiveLine' which, when enabled, gives the |
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// active line's wrapping <div> the CSS class "CodeMirror-activeline", |
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// and gives its background <div> the class "CodeMirror-activeline-background". |
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|
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(function() { |
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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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|
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CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) { |
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var prev = old && old != CodeMirror.Init; |
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if (val && !prev) { |
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updateActiveLine(cm); |
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cm.on("cursorActivity", updateActiveLine); |
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} else if (!val && prev) { |
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cm.off("cursorActivity", updateActiveLine); |
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clearActiveLine(cm); |
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delete cm.state.activeLine; |
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} |
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}); |
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|
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function clearActiveLine(cm) { |
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if ("activeLine" in cm.state) { |
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cm.removeLineClass(cm.state.activeLine, "wrap", WRAP_CLASS); |
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cm.removeLineClass(cm.state.activeLine, "background", BACK_CLASS); |
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} |
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} |
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|
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function updateActiveLine(cm) { |
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var line = cm.getLineHandleVisualStart(cm.getCursor().line); |
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if (cm.state.activeLine == line) return; |
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clearActiveLine(cm); |
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cm.addLineClass(line, "wrap", WRAP_CLASS); |
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cm.addLineClass(line, "background", BACK_CLASS); |
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cm.state.activeLine = line; |
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} |
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})(); |
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|
