Subversion-Projekte lars-tiefland.ci

// CodeMirror, copyright (c) by Marijn Haverbeke and others

// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {

  if (typeof exports == "object" && typeof module == "object") // CommonJS

    mod(require("../../lib/codemirror"), require("./foldcode"));

  else if (typeof define == "function" && define.amd) // AMD

    define(["../../lib/codemirror", "./foldcode"], mod);

  else // Plain browser env

    mod(CodeMirror);

})(function(CodeMirror) {

  "use strict";

  CodeMirror.defineOption("foldGutter", false, function(cm, val, old) {

    if (old && old != CodeMirror.Init) {

      cm.clearGutter(cm.state.foldGutter.options.gutter);

      cm.state.foldGutter = null;

      cm.off("gutterClick", onGutterClick);

      cm.off("change", onChange);

      cm.off("viewportChange", onViewportChange);

      cm.off("fold", onFold);

      cm.off("unfold", onFold);

      cm.off("swapDoc", updateInViewport);

    }

    if (val) {

      cm.state.foldGutter = new State(parseOptions(val));

      updateInViewport(cm);

      cm.on("gutterClick", onGutterClick);

      cm.on("change", onChange);

      cm.on("viewportChange", onViewportChange);

      cm.on("fold", onFold);

      cm.on("unfold", onFold);

      cm.on("swapDoc", updateInViewport);

    }

  });

  var Pos = CodeMirror.Pos;

  function State(options) {

    this.options = options;

    this.from = this.to = 0;

  }

  function parseOptions(opts) {

    if (opts === true) opts = {};

    if (opts.gutter == null) opts.gutter = "CodeMirror-foldgutter";

    if (opts.indicatorOpen == null) opts.indicatorOpen = "CodeMirror-foldgutter-open";

    if (opts.indicatorFolded == null) opts.indicatorFolded = "CodeMirror-foldgutter-folded";

    return opts;

  }

  function isFolded(cm, line) {

    var marks = cm.findMarksAt(Pos(line));

    for (var i = 0; i < marks.length; ++i)

      if (marks[i].__isFold && marks[i].find().from.line == line) return marks[i];

  }

  function marker(spec) {

    if (typeof spec == "string") {

      var elt = document.createElement("div");

      elt.className = spec + " CodeMirror-guttermarker-subtle";

      return elt;

    } else {

      return spec.cloneNode(true);

    }

  }

  function updateFoldInfo(cm, from, to) {

    var opts = cm.state.foldGutter.options, cur = from;

    var minSize = cm.foldOption(opts, "minFoldSize");

    var func = cm.foldOption(opts, "rangeFinder");

    cm.eachLine(from, to, function(line) {

      var mark = null;

      if (isFolded(cm, cur)) {

        mark = marker(opts.indicatorFolded);

      } else {

        var pos = Pos(cur, 0);

        var range = func && func(cm, pos);

        if (range && range.to.line - range.from.line >= minSize)

          mark = marker(opts.indicatorOpen);

      }

      cm.setGutterMarker(line, opts.gutter, mark);

      ++cur;

    });

  }

  function updateInViewport(cm) {

    var vp = cm.getViewport(), state = cm.state.foldGutter;

    if (!state) return;

    cm.operation(function() {

      updateFoldInfo(cm, vp.from, vp.to);

    });

    state.from = vp.from; state.to = vp.to;

  }

  function onGutterClick(cm, line, gutter) {

    var state = cm.state.foldGutter;

    if (!state) return;

    var opts = state.options;

    if (gutter != opts.gutter) return;

    var folded = isFolded(cm, line);

    if (folded) folded.clear();

    else cm.foldCode(Pos(line, 0), opts.rangeFinder);

  }

  function onChange(cm) {

    var state = cm.state.foldGutter;

    if (!state) return;

    var opts = state.options;

    state.from = state.to = 0;

    clearTimeout(state.changeUpdate);

    state.changeUpdate = setTimeout(function() { updateInViewport(cm); }, opts.foldOnChangeTimeSpan || 600);

  }

  function onViewportChange(cm) {

    var state = cm.state.foldGutter;

    if (!state) return;

    var opts = state.options;

    clearTimeout(state.changeUpdate);

    state.changeUpdate = setTimeout(function() {

      var vp = cm.getViewport();

      if (state.from == state.to || vp.from - state.to > 20 || state.from - vp.to > 20) {

        updateInViewport(cm);

      } else {

        cm.operation(function() {

          if (vp.from < state.from) {

            updateFoldInfo(cm, vp.from, state.from);

            state.from = vp.from;

          }

          if (vp.to > state.to) {

            updateFoldInfo(cm, state.to, vp.to);

            state.to = vp.to;

          }

        });

      }

    }, opts.updateViewportTimeSpan || 400);

  }

  function onFold(cm, from) {

    var state = cm.state.foldGutter;

    if (!state) return;

    var line = from.line;

    if (line >= state.from && line < state.to)

      updateFoldInfo(cm, line, line + 1);

  }

});