openrat-cms

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active-line.js (2506B)


      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   var WRAP_CLASS = "CodeMirror-activeline";
     14   var BACK_CLASS = "CodeMirror-activeline-background";
     15   var GUTT_CLASS = "CodeMirror-activeline-gutter";
     16 
     17   CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
     18     var prev = old == CodeMirror.Init ? false : old;
     19     if (val == prev) return
     20     if (prev) {
     21       cm.off("beforeSelectionChange", selectionChange);
     22       clearActiveLines(cm);
     23       delete cm.state.activeLines;
     24     }
     25     if (val) {
     26       cm.state.activeLines = [];
     27       updateActiveLines(cm, cm.listSelections());
     28       cm.on("beforeSelectionChange", selectionChange);
     29     }
     30   });
     31 
     32   function clearActiveLines(cm) {
     33     for (var i = 0; i < cm.state.activeLines.length; i++) {
     34       cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
     35       cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
     36       cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
     37     }
     38   }
     39 
     40   function sameArray(a, b) {
     41     if (a.length != b.length) return false;
     42     for (var i = 0; i < a.length; i++)
     43       if (a[i] != b[i]) return false;
     44     return true;
     45   }
     46 
     47   function updateActiveLines(cm, ranges) {
     48     var active = [];
     49     for (var i = 0; i < ranges.length; i++) {
     50       var range = ranges[i];
     51       var option = cm.getOption("styleActiveLine");
     52       if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
     53         continue
     54       var line = cm.getLineHandleVisualStart(range.head.line);
     55       if (active[active.length - 1] != line) active.push(line);
     56     }
     57     if (sameArray(cm.state.activeLines, active)) return;
     58     cm.operation(function() {
     59       clearActiveLines(cm);
     60       for (var i = 0; i < active.length; i++) {
     61         cm.addLineClass(active[i], "wrap", WRAP_CLASS);
     62         cm.addLineClass(active[i], "background", BACK_CLASS);
     63         cm.addLineClass(active[i], "gutter", GUTT_CLASS);
     64       }
     65       cm.state.activeLines = active;
     66     });
     67   }
     68 
     69   function selectionChange(cm, sel) {
     70     updateActiveLines(cm, sel.ranges);
     71   }
     72 });