wcfsetup/install/files/js/3rdParty/codemirror/addon/selection/active-line.js

   1 // Because sometimes you need to style the cursor's line.
   2 //
   3 // Adds an option 'styleActiveLine' which, when enabled, gives the
   4 // active line's wrapping <div> the CSS class "CodeMirror-activeline",
   5 // and gives its background <div> the class "CodeMirror-activeline-background".
   6
   7 (function() {
   8   "use strict";
   9   var WRAP_CLASS = "CodeMirror-activeline";
  10   var BACK_CLASS = "CodeMirror-activeline-background";
  11
  12   CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
  13     var prev = old && old != CodeMirror.Init;
  14     if (val && !prev) {
  15       updateActiveLine(cm);
  16       cm.on("cursorActivity", updateActiveLine);
  17     } else if (!val && prev) {
  18       cm.off("cursorActivity", updateActiveLine);
  19       clearActiveLine(cm);
  20       delete cm.state.activeLine;
  21     }
  22   });
  23
  24   function clearActiveLine(cm) {
  25     if ("activeLine" in cm.state) {
  26       cm.removeLineClass(cm.state.activeLine, "wrap", WRAP_CLASS);
  27       cm.removeLineClass(cm.state.activeLine, "background", BACK_CLASS);
  28     }
  29   }
  30
  31   function updateActiveLine(cm) {
  32     var line = cm.getLineHandle(cm.getCursor().line);
  33     if (cm.state.activeLine == line) return;
  34     clearActiveLine(cm);
  35     cm.addLineClass(line, "wrap", WRAP_CLASS);
  36     cm.addLineClass(line, "background", BACK_CLASS);
  37     cm.state.activeLine = line;
  38   }
  39 })();