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foldgutter.js
147 lines
| 1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others |
| 2 | // Distributed under an MIT license: http://codemirror.net/LICENSE |
| 3 | |
| 4 | (function(mod) { |
| 5 | if (typeof exports == "object" && typeof module == "object") // CommonJS |
| 6 | mod(require("../../lib/codemirror"), require("./foldcode")); |
| 7 | else if (typeof define == "function" && define.amd) // AMD |
| 8 | define(["../../lib/codemirror", "./foldcode"], mod); |
| 9 | else // Plain browser env |
| 10 | mod(CodeMirror); |
| 11 | })(function(CodeMirror) { |
| 12 | "use strict"; |
| 13 | |
| 14 | CodeMirror.defineOption("foldGutter", false, function(cm, val, old) { |
| 15 | if (old && old != CodeMirror.Init) { |
| 16 | cm.clearGutter(cm.state.foldGutter.options.gutter); |
| 17 | cm.state.foldGutter = null; |
| 18 | cm.off("gutterClick", onGutterClick); |
| 19 | cm.off("change", onChange); |
| 20 | cm.off("viewportChange", onViewportChange); |
| 21 | cm.off("fold", onFold); |
| 22 | cm.off("unfold", onFold); |
| 23 | cm.off("swapDoc", updateInViewport); |
| 24 | } |
| 25 | if (val) { |
| 26 | cm.state.foldGutter = new State(parseOptions(val)); |
| 27 | updateInViewport(cm); |
| 28 | cm.on("gutterClick", onGutterClick); |
| 29 | cm.on("change", onChange); |
| 30 | cm.on("viewportChange", onViewportChange); |
| 31 | cm.on("fold", onFold); |
| 32 | cm.on("unfold", onFold); |
| 33 | cm.on("swapDoc", updateInViewport); |
| 34 | } |
| 35 | }); |
| 36 | |
| 37 | var Pos = CodeMirror.Pos; |
| 38 | |
| 39 | function State(options) { |
| 40 | this.options = options; |
| 41 | this.from = this.to = 0; |
| 42 | } |
| 43 | |
| 44 | function parseOptions(opts) { |
| 45 | if (opts === true) opts = {}; |
| 46 | if (opts.gutter == null) opts.gutter = "CodeMirror-foldgutter"; |
| 47 | if (opts.indicatorOpen == null) opts.indicatorOpen = "CodeMirror-foldgutter-open"; |
| 48 | if (opts.indicatorFolded == null) opts.indicatorFolded = "CodeMirror-foldgutter-folded"; |
| 49 | return opts; |
| 50 | } |
| 51 | |
| 52 | function isFolded(cm, line) { |
| 53 | var marks = cm.findMarksAt(Pos(line)); |
| 54 | for (var i = 0; i < marks.length; ++i) |
| 55 | if (marks[i].__isFold && marks[i].find().from.line == line) return marks[i]; |
| 56 | } |
| 57 | |
| 58 | function marker(spec) { |
| 59 | if (typeof spec == "string") { |
| 60 | var elt = document.createElement("div"); |
| 61 | elt.className = spec + " CodeMirror-guttermarker-subtle"; |
| 62 | return elt; |
| 63 | } else { |
| 64 | return spec.cloneNode(true); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | function updateFoldInfo(cm, from, to) { |
| 69 | var opts = cm.state.foldGutter.options, cur = from; |
| 70 | var minSize = cm.foldOption(opts, "minFoldSize"); |
| 71 | var func = cm.foldOption(opts, "rangeFinder"); |
| 72 | cm.eachLine(from, to, function(line) { |
| 73 | var mark = null; |
| 74 | if (isFolded(cm, cur)) { |
| 75 | mark = marker(opts.indicatorFolded); |
| 76 | } else { |
| 77 | var pos = Pos(cur, 0); |
| 78 | var range = func && func(cm, pos); |
| 79 | if (range && range.to.line - range.from.line >= minSize) |
| 80 | mark = marker(opts.indicatorOpen); |
| 81 | } |
| 82 | cm.setGutterMarker(line, opts.gutter, mark); |
| 83 | ++cur; |
| 84 | }); |
| 85 | } |
| 86 | |
| 87 | function updateInViewport(cm) { |
| 88 | var vp = cm.getViewport(), state = cm.state.foldGutter; |
| 89 | if (!state) return; |
| 90 | cm.operation(function() { |
| 91 | updateFoldInfo(cm, vp.from, vp.to); |
| 92 | }); |
| 93 | state.from = vp.from; state.to = vp.to; |
| 94 | } |
| 95 | |
| 96 | function onGutterClick(cm, line, gutter) { |
| 97 | var state = cm.state.foldGutter; |
| 98 | if (!state) return; |
| 99 | var opts = state.options; |
| 100 | if (gutter != opts.gutter) return; |
| 101 | var folded = isFolded(cm, line); |
| 102 | if (folded) folded.clear(); |
| 103 | else cm.foldCode(Pos(line, 0), opts.rangeFinder); |
| 104 | } |
| 105 | |
| 106 | function onChange(cm) { |
| 107 | var state = cm.state.foldGutter; |
| 108 | if (!state) return; |
| 109 | var opts = state.options; |
| 110 | state.from = state.to = 0; |
| 111 | clearTimeout(state.changeUpdate); |
| 112 | state.changeUpdate = setTimeout(function() { updateInViewport(cm); }, opts.foldOnChangeTimeSpan || 600); |
| 113 | } |
| 114 | |
| 115 | function onViewportChange(cm) { |
| 116 | var state = cm.state.foldGutter; |
| 117 | if (!state) return; |
| 118 | var opts = state.options; |
| 119 | clearTimeout(state.changeUpdate); |
| 120 | state.changeUpdate = setTimeout(function() { |
| 121 | var vp = cm.getViewport(); |
| 122 | if (state.from == state.to || vp.from - state.to > 20 || state.from - vp.to > 20) { |
| 123 | updateInViewport(cm); |
| 124 | } else { |
| 125 | cm.operation(function() { |
| 126 | if (vp.from < state.from) { |
| 127 | updateFoldInfo(cm, vp.from, state.from); |
| 128 | state.from = vp.from; |
| 129 | } |
| 130 | if (vp.to > state.to) { |
| 131 | updateFoldInfo(cm, state.to, vp.to); |
| 132 | state.to = vp.to; |
| 133 | } |
| 134 | }); |
| 135 | } |
| 136 | }, opts.updateViewportTimeSpan || 400); |
| 137 | } |
| 138 | |
| 139 | function onFold(cm, from) { |
| 140 | var state = cm.state.foldGutter; |
| 141 | if (!state) return; |
| 142 | var line = from.line; |
| 143 | if (line >= state.from && line < state.to) |
| 144 | updateFoldInfo(cm, line, line + 1); |
| 145 | } |
| 146 | }); |
| 147 |