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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://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("change", 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(curLine);
}
if (wrapping && curLineObj.height > singleLineH)
return cm.charCoords(pos, "local")[top ? "top" : "bottom"];
var topY = cm.heightAtLine(curLineObj, "local");
return topY + (top ? 0 : curLineObj.height);
}
if (cm.display.barWidth) for (var i = 0, nextTop; i < anns.length; i++) {
var ann = anns[i];
var top = nextTop || getY(ann.from, true) * hScale;
var bottom = getY(ann.to, false) * hScale;
while (i < anns.length - 1) {
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 * 1.5, 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("change", this.changeHandler);
this.div.parentNode.removeChild(this.div);
};
});
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