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(function() { |
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"use strict"; |
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|
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CodeMirror.defineOption("foldGutter", false, function(cm, val, old) { |
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if (old && old != CodeMirror.Init) { |
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cm.clearGutter(cm.state.foldGutter.options.gutter); |
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cm.state.foldGutter = null; |
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cm.off("gutterClick", onGutterClick); |
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cm.off("change", onChange); |
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cm.off("viewportChange", onViewportChange); |
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cm.off("fold", onFold); |
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cm.off("unfold", onFold); |
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} |
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if (val) { |
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cm.state.foldGutter = new State(parseOptions(val)); |
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updateInViewport(cm); |
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cm.on("gutterClick", onGutterClick); |
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cm.on("change", onChange); |
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cm.on("viewportChange", onViewportChange); |
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cm.on("fold", onFold); |
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cm.on("unfold", onFold); |
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} |
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}); |
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|
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var Pos = CodeMirror.Pos; |
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|
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function State(options) { |
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this.options = options; |
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this.from = this.to = 0; |
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} |
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|
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function parseOptions(opts) { |
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if (opts === true) opts = {}; |
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if (opts.gutter == null) opts.gutter = "CodeMirror-foldgutter"; |
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if (opts.indicatorOpen == null) opts.indicatorOpen = "CodeMirror-foldgutter-open"; |
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if (opts.indicatorFolded == null) opts.indicatorFolded = "CodeMirror-foldgutter-folded"; |
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return opts; |
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} |
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|
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function isFolded(cm, line) { |
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var marks = cm.findMarksAt(Pos(line)); |
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for (var i = 0; i < marks.length; ++i) |
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if (marks[i].__isFold && marks[i].find().from.line == line) return true; |
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} |
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|
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function marker(spec) { |
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if (typeof spec == "string") { |
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var elt = document.createElement("div"); |
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elt.className = spec; |
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return elt; |
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} else { |
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return spec.cloneNode(true); |
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} |
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} |
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|
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function updateFoldInfo(cm, from, to) { |
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var opts = cm.state.foldGutter.options, cur = from; |
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cm.eachLine(from, to, function(line) { |
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var mark = null; |
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if (isFolded(cm, cur)) { |
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mark = marker(opts.indicatorFolded); |
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} else { |
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var pos = Pos(cur, 0), func = opts.rangeFinder || cm.getHelper(pos, "fold"); |
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var range = func && func(cm, pos); |
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if (range && range.from.line + 1 < range.to.line) |
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mark = marker(opts.indicatorOpen); |
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} |
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cm.setGutterMarker(line, opts.gutter, mark); |
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++cur; |
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}); |
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} |
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|
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function updateInViewport(cm) { |
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var vp = cm.getViewport(), state = cm.state.foldGutter; |
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if (!state) return; |
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cm.operation(function() { |
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updateFoldInfo(cm, vp.from, vp.to); |
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}); |
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state.from = vp.from; state.to = vp.to; |
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} |
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|
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function onGutterClick(cm, line, gutter) { |
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var opts = cm.state.foldGutter.options; |
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if (gutter != opts.gutter) return; |
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cm.foldCode(Pos(line, 0), opts.rangeFinder); |
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} |
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|
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function onChange(cm) { |
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var state = cm.state.foldGutter; |
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state.from = state.to = 0; |
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clearTimeout(state.changeUpdate); |
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state.changeUpdate = setTimeout(function() { updateInViewport(cm); }, 600); |
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} |
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|
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function onViewportChange(cm) { |
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var state = cm.state.foldGutter; |
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clearTimeout(state.changeUpdate); |
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state.changeUpdate = setTimeout(function() { |
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var vp = cm.getViewport(); |
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if (state.from == state.to || vp.from - state.to > 20 || state.from - vp.to > 20) { |
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updateInViewport(cm); |
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} else { |
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cm.operation(function() { |
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if (vp.from < state.from) { |
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updateFoldInfo(cm, vp.from, state.from); |
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state.from = vp.from; |
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} |
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if (vp.to > state.to) { |
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updateFoldInfo(cm, state.to, vp.to); |
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state.to = vp.to; |
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} |
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}); |
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} |
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}, 400); |
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} |
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|
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function onFold(cm, from) { |
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var state = cm.state.foldGutter, line = from.line; |
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if (line >= state.from && line < state.to) |
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updateFoldInfo(cm, line, line + 1); |
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} |
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})(); |
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|
