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rulers.js (1915B)

      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) {
     15     if (cm.state.rulerDiv) {
     16       cm.state.rulerDiv.parentElement.removeChild(cm.state.rulerDiv)
     17       cm.state.rulerDiv = null
     18       cm.off("refresh", drawRulers)
     19     }
     20     if (val && val.length) {
     21       cm.state.rulerDiv = cm.display.lineSpace.parentElement.insertBefore(document.createElement("div"), cm.display.lineSpace)
     22       cm.state.rulerDiv.className = "CodeMirror-rulers"
     23       drawRulers(cm)
     24       cm.on("refresh", drawRulers)
     25     }
     26   });
     27 
     28   function drawRulers(cm) {
     29     cm.state.rulerDiv.textContent = ""
     30     var val = cm.getOption("rulers");
     31     var cw = cm.defaultCharWidth();
     32     var left = cm.charCoords(CodeMirror.Pos(cm.firstLine(), 0), "div").left;
     33     cm.state.rulerDiv.style.minHeight = (cm.display.scroller.offsetHeight + 30) + "px";
     34     for (var i = 0; i < val.length; i++) {
     35       var elt = document.createElement("div");
     36       elt.className = "CodeMirror-ruler";
     37       var col, conf = val[i];
     38       if (typeof conf == "number") {
     39         col = conf;
     40       } else {
     41         col = conf.column;
     42         if (conf.className) elt.className += " " + conf.className;
     43         if (conf.color) elt.style.borderColor = conf.color;
     44         if (conf.lineStyle) elt.style.borderLeftStyle = conf.lineStyle;
     45         if (conf.width) elt.style.borderLeftWidth = conf.width;
     46       }
     47       elt.style.left = (left + col * cw) + "px";
     48       cm.state.rulerDiv.appendChild(elt)
     49     }
     50   }
     51 });