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							- // CodeMirror, copyright (c) by Marijn Haverbeke and others
 
- // Distributed under an MIT license: https://codemirror.net/LICENSE
 
- (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";
 
-   CodeMirror.defineExtension("annotateScrollbar", function(options) {
 
-     if (typeof options == "string") options = {className: options};
 
-     return new Annotation(this, options);
 
-   });
 
-   CodeMirror.defineOption("scrollButtonHeight", 0);
 
-   function Annotation(cm, options) {
 
-     this.cm = cm;
 
-     this.options = options;
 
-     this.buttonHeight = options.scrollButtonHeight || cm.getOption("scrollButtonHeight");
 
-     this.annotations = [];
 
-     this.doRedraw = this.doUpdate = null;
 
-     this.div = cm.getWrapperElement().appendChild(document.createElement("div"));
 
-     this.div.style.cssText = "position: absolute; right: 0; top: 0; z-index: 7; pointer-events: none";
 
-     this.computeScale();
 
-     function scheduleRedraw(delay) {
 
-       clearTimeout(self.doRedraw);
 
-       self.doRedraw = setTimeout(function() { self.redraw(); }, delay);
 
-     }
 
-     var self = this;
 
-     cm.on("refresh", this.resizeHandler = function() {
 
-       clearTimeout(self.doUpdate);
 
-       self.doUpdate = setTimeout(function() {
 
-         if (self.computeScale()) scheduleRedraw(20);
 
-       }, 100);
 
-     });
 
-     cm.on("markerAdded", this.resizeHandler);
 
-     cm.on("markerCleared", this.resizeHandler);
 
-     if (options.listenForChanges !== false)
 
-       cm.on("changes", this.changeHandler = function() {
 
-         scheduleRedraw(250);
 
-       });
 
-   }
 
-   Annotation.prototype.computeScale = function() {
 
-     var cm = this.cm;
 
-     var hScale = (cm.getWrapperElement().clientHeight - cm.display.barHeight - this.buttonHeight * 2) /
 
-       cm.getScrollerElement().scrollHeight
 
-     if (hScale != this.hScale) {
 
-       this.hScale = hScale;
 
-       return true;
 
-     }
 
-   };
 
-   Annotation.prototype.update = function(annotations) {
 
-     this.annotations = annotations;
 
-     this.redraw();
 
-   };
 
-   Annotation.prototype.redraw = function(compute) {
 
-     if (compute !== false) this.computeScale();
 
-     var cm = this.cm, hScale = this.hScale;
 
-     var frag = document.createDocumentFragment(), anns = this.annotations;
 
-     var wrapping = cm.getOption("lineWrapping");
 
-     var singleLineH = wrapping && cm.defaultTextHeight() * 1.5;
 
-     var curLine = null, curLineObj = null;
 
-     function getY(pos, top) {
 
-       if (curLine != pos.line) {
 
-         curLine = pos.line
 
-         curLineObj = cm.getLineHandle(pos.line)
 
-         var visual = cm.getLineHandleVisualStart(curLineObj)
 
-         if (visual != curLineObj) {
 
-           curLine = cm.getLineNumber(visual)
 
-           curLineObj = visual
 
-         }
 
-       }
 
-       if ((curLineObj.widgets && curLineObj.widgets.length) ||
 
-           (wrapping && curLineObj.height > singleLineH))
 
-         return cm.charCoords(pos, "local")[top ? "top" : "bottom"];
 
-       var topY = cm.heightAtLine(curLineObj, "local");
 
-       return topY + (top ? 0 : curLineObj.height);
 
-     }
 
-     var lastLine = cm.lastLine()
 
-     if (cm.display.barWidth) for (var i = 0, nextTop; i < anns.length; i++) {
 
-       var ann = anns[i];
 
-       if (ann.to.line > lastLine) continue;
 
-       var top = nextTop || getY(ann.from, true) * hScale;
 
-       var bottom = getY(ann.to, false) * hScale;
 
-       while (i < anns.length - 1) {
 
-         if (anns[i + 1].to.line > lastLine) break;
 
-         nextTop = getY(anns[i + 1].from, true) * hScale;
 
-         if (nextTop > bottom + .9) break;
 
-         ann = anns[++i];
 
-         bottom = getY(ann.to, false) * hScale;
 
-       }
 
-       if (bottom == top) continue;
 
-       var height = Math.max(bottom - top, 3);
 
-       var elt = frag.appendChild(document.createElement("div"));
 
-       elt.style.cssText = "position: absolute; right: 0px; width: " + Math.max(cm.display.barWidth - 1, 2) + "px; top: "
 
-         + (top + this.buttonHeight) + "px; height: " + height + "px";
 
-       elt.className = this.options.className;
 
-       if (ann.id) {
 
-         elt.setAttribute("annotation-id", ann.id);
 
-       }
 
-     }
 
-     this.div.textContent = "";
 
-     this.div.appendChild(frag);
 
-   };
 
-   Annotation.prototype.clear = function() {
 
-     this.cm.off("refresh", this.resizeHandler);
 
-     this.cm.off("markerAdded", this.resizeHandler);
 
-     this.cm.off("markerCleared", this.resizeHandler);
 
-     if (this.changeHandler) this.cm.off("changes", this.changeHandler);
 
-     this.div.parentNode.removeChild(this.div);
 
-   };
 
- });
 
 
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