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