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foldgutter.min.js (4631B)

      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", onChange);
     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", onChange);
     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.findMarks(Pos(line, 0), Pos(line + 1, 0));
     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 });