mirror of
https://github.com/Jermolene/TiddlyWiki5
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115 lines
3.0 KiB
JavaScript
115 lines
3.0 KiB
JavaScript
/*\
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title: $:/core/modules/macros/scrollable.js
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type: application/javascript
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module-type: macro
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Creates a scrollable frame around its content
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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exports.info = {
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name: "scrollable",
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params: {
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width: {byName: true, type: "text"},
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height: {byName: true, type: "text"},
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"class": {byName: true, type: "text"}
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}
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};
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exports.executeMacro = function() {
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var innerClasses = ["tw-scrollable-inner"],
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innerAttributes = {
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"class": innerClasses,
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style: {
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overflow: "visible",
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position: "relative"
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}
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},
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outerClasses = ["tw-scrollable","tw-scrollable-outer"],
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outerAttributes = {
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"class": outerClasses,
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style: {
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overflow: "auto",
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"-webkit-overflow-scrolling": "touch",
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"white-space": "nowrap"
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}
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};
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if(this.hasParameter("class")) {
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outerClasses.push(this.params["class"]);
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}
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if(this.classes) {
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$tw.utils.pushTop(outerClasses,this.classes);
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}
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if(this.hasParameter("width")) {
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outerAttributes.style.width = this.params.width;
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}
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if(this.hasParameter("height")) {
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outerAttributes.style.height = this.params.height;
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}
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this.innerFrame = $tw.Tree.Element("div",innerAttributes,this.content);
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this.outerFrame = $tw.Tree.Element("div",outerAttributes,[this.innerFrame],{
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events: ["tw-scroll"],
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eventHandler: this
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});
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this.outerFrame.execute(this.parents,this.tiddlerTitle);
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return this.outerFrame;
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};
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exports.handleEvent = function(event) {
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if(event.type === "tw-scroll") {
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return this.handleScrollEvent(event);
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}
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return true;
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}
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exports.handleScrollEvent = function(event) {
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var domNode = event.target,
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bounds = {
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left: domNode.offsetLeft,
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top: domNode.offsetTop,
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width: domNode.offsetWidth,
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height: domNode.offsetHeight
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};
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// Walk up the tree adjusting the offset bounds by each offsetParent
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while(domNode.offsetParent && domNode.offsetParent !== this.innerFrame.domNode) {
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domNode = domNode.offsetParent;
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bounds.left += domNode.offsetLeft;
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bounds.top += domNode.offsetTop;
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}
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this.cancelScroll();
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this.startTime = new Date();
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this.startX = this.child.domNode.scrollLeft;
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this.startY = this.child.domNode.scrollTop;
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this.endX = bounds.left;
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this.endY = bounds.top;
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if((this.endX < this.startX) || (this.endX > (this.startX + this.child.domNode.offsetWidth)) || (this.endY < this.startY) || (this.endY > (this.startY + this.child.domNode.offsetHeight))) {
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var self = this;
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this.scrollTimerId = window.setInterval(function() {
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var t = ((new Date()) - self.startTime) / $tw.config.preferences.animationDuration;
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if(t >= 1) {
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self.cancelScroll();
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t = 1;
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}
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t = $tw.utils.slowInSlowOut(t);
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self.child.domNode.scrollLeft = self.startX + (self.endX - self.startX) * t;
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self.child.domNode.scrollTop = self.startY + (self.endY - self.startY) * t;
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}, 10);
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}
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event.stopPropagation();
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return false;
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};
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exports.cancelScroll = function() {
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if(this.scrollTimerId) {
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window.clearInterval(this.scrollTimerId);
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this.scrollTimerId = null;
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}
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};
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})();
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