Revert of DevTools: Roll CodeMirror to 5.25.1

third_party/WebKit/Source/devtools/front_end/cm/activeline.js

 // CodeMirror, copyright (c) by Marijn Haverbeke and others
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
+// Because sometimes you need to style the cursor's line.
+//
+// Adds an option 'styleActiveLine' which, when enabled, gives the
+// active line's wrapping <div> the CSS class "CodeMirror-activeline",
+// and gives its background <div> the class "CodeMirror-activeline-background".
+
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
   "use strict";
   var WRAP_CLASS = "CodeMirror-activeline";
   var BACK_CLASS = "CodeMirror-activeline-background";
   var GUTT_CLASS = "CodeMirror-activeline-gutter";
 
   CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
-    var prev = old == CodeMirror.Init ? false : old;
-    if (val == prev) return
-    if (prev) {
+    var prev = old && old != CodeMirror.Init;
+    if (val && !prev) {
+      cm.state.activeLines = [];
+      updateActiveLines(cm, cm.listSelections());
+      cm.on("beforeSelectionChange", selectionChange);
+    } else if (!val && prev) {
       cm.off("beforeSelectionChange", selectionChange);
       clearActiveLines(cm);
       delete cm.state.activeLines;
     }
-    if (val) {
-      cm.state.activeLines = [];
-      updateActiveLines(cm, cm.listSelections());
-      cm.on("beforeSelectionChange", selectionChange);
-    }
   });
 
   function clearActiveLines(cm) {
     for (var i = 0; i < cm.state.activeLines.length; i++) {
       cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
       cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
       cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
     }
   }
 
   function sameArray(a, b) {
     if (a.length != b.length) return false;
     for (var i = 0; i < a.length; i++)
       if (a[i] != b[i]) return false;
     return true;
   }
 
   function updateActiveLines(cm, ranges) {
     var active = [];
     for (var i = 0; i < ranges.length; i++) {
       var range = ranges[i];
-      var option = cm.getOption("styleActiveLine");
-      if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
-        continue
+      if (!range.empty()) continue;
       var line = cm.getLineHandleVisualStart(range.head.line);
       if (active[active.length - 1] != line) active.push(line);
     }
     if (sameArray(cm.state.activeLines, active)) return;
     cm.operation(function() {
       clearActiveLines(cm);
       for (var i = 0; i < active.length; i++) {
         cm.addLineClass(active[i], "wrap", WRAP_CLASS);
         cm.addLineClass(active[i], "background", BACK_CLASS);
         cm.addLineClass(active[i], "gutter", GUTT_CLASS);
       }
       cm.state.activeLines = active;
     });
   }
 
   function selectionChange(cm, sel) {
     updateActiveLines(cm, sel.ranges);
   }
 });