wcfsetup/install/files/js/3rdParty/codemirror/addon/fold/foldgutter.js

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