github.com/elliott5/community@v0.14.1-0.20160709191136-823126fb026a/app/public/codemirror/addon/display/rulers.js (about)

     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"));
     7    else if (typeof define == "function" && define.amd) // AMD
     8      define(["../../lib/codemirror"], mod);
     9    else // Plain browser env
    10      mod(CodeMirror);
    11  })(function(CodeMirror) {
    12    "use strict";
    13  
    14    CodeMirror.defineOption("rulers", false, function(cm, val, old) {
    15      if (old && old != CodeMirror.Init) {
    16        clearRulers(cm);
    17        cm.off("refresh", refreshRulers);
    18      }
    19      if (val && val.length) {
    20        setRulers(cm);
    21        cm.on("refresh", refreshRulers);
    22      }
    23    });
    24  
    25    function clearRulers(cm) {
    26      for (var i = cm.display.lineSpace.childNodes.length - 1; i >= 0; i--) {
    27        var node = cm.display.lineSpace.childNodes[i];
    28        if (/(^|\s)CodeMirror-ruler($|\s)/.test(node.className))
    29          node.parentNode.removeChild(node);
    30      }
    31    }
    32  
    33    function setRulers(cm) {
    34      var val = cm.getOption("rulers");
    35      var cw = cm.defaultCharWidth();
    36      var left = cm.charCoords(CodeMirror.Pos(cm.firstLine(), 0), "div").left;
    37      var minH = cm.display.scroller.offsetHeight + 30;
    38      for (var i = 0; i < val.length; i++) {
    39        var elt = document.createElement("div");
    40        elt.className = "CodeMirror-ruler";
    41        var col, conf = val[i];
    42        if (typeof conf == "number") {
    43          col = conf;
    44        } else {
    45          col = conf.column;
    46          if (conf.className) elt.className += " " + conf.className;
    47          if (conf.color) elt.style.borderColor = conf.color;
    48          if (conf.lineStyle) elt.style.borderLeftStyle = conf.lineStyle;
    49          if (conf.width) elt.style.borderLeftWidth = conf.width;
    50        }
    51        elt.style.left = (left + col * cw) + "px";
    52        elt.style.top = "-50px";
    53        elt.style.bottom = "-20px";
    54        elt.style.minHeight = minH + "px";
    55        cm.display.lineSpace.insertBefore(elt, cm.display.cursorDiv);
    56      }
    57    }
    58  
    59    function refreshRulers(cm) {
    60      clearRulers(cm);
    61      setRulers(cm);
    62    }
    63  });