| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128 | // 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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