607 lignes
20 KiB
JavaScript
607 lignes
20 KiB
JavaScript
/* Copyright (c) 2012 HyeonJe Jun (http://github.com/noraesae)
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* Licensed under the MIT License
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*/
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(function (factory) {
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'use strict';
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['jquery'], factory);
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} else if (typeof exports === 'object') {
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// Node/CommonJS
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factory(require('jquery'));
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} else {
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// Browser globals
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factory(jQuery);
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}
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}(function ($) {
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'use strict';
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// The default settings for the plugin
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var defaultSettings = {
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wheelSpeed: 80,
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wheelPropagation: false,
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minScrollbarLength: null,
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useBothWheelAxes: false,
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useKeyboard: true,
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suppressScrollX: true,
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suppressScrollY: false,
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scrollXMarginOffset: 0,
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scrollYMarginOffset: 0,
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includePadding: true
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};
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var getEventClassName = (function () {
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var incrementingId = 0;
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return function () {
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var id = incrementingId;
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incrementingId += 1;
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return '.perfect-scrollbar-' + id;
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};
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}());
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$.fn.perfectScrollbar = function (suppliedSettings, option) {
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return this.each(function () {
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// Use the default settings
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var settings = $.extend(true, {}, defaultSettings),
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$this = $(this);
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if (typeof suppliedSettings === "object") {
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// But over-ride any supplied
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$.extend(true, settings, suppliedSettings);
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} else {
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// If no settings were supplied, then the first param must be the option
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option = suppliedSettings;
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}
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// Catch options
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if (option === 'update') {
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if ($this.data('perfect-scrollbar-update')) {
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$this.data('perfect-scrollbar-update')();
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}
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return $this;
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}
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else if (option === 'destroy') {
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if ($this.data('perfect-scrollbar-destroy')) {
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$this.data('perfect-scrollbar-destroy')();
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}
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return $this;
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}
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if ($this.data('perfect-scrollbar')) {
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// if there's already perfect-scrollbar
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return $this.data('perfect-scrollbar');
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}
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// Or generate new perfectScrollbar
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// Set class to the container
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$this.addClass('ps-container');
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var $scrollbarXRail = $("<div class='ps-scrollbar-x-rail'></div>").appendTo($this),
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$scrollbarYRail = $("<div class='ps-scrollbar-y-rail'></div>").appendTo($this),
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$scrollbarX = $("<div class='ps-scrollbar-x'></div>").appendTo($scrollbarXRail),
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$scrollbarY = $("<div class='ps-scrollbar-y'></div>").appendTo($scrollbarYRail),
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scrollbarXActive,
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scrollbarYActive,
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containerWidth,
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containerHeight,
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contentWidth,
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contentHeight,
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scrollbarXWidth,
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scrollbarXLeft,
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scrollbarXBottom = parseInt($scrollbarXRail.css('bottom'), 10),
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scrollbarYHeight,
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scrollbarYTop,
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scrollbarYRight = parseInt($scrollbarYRail.css('right'), 10),
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eventClassName = getEventClassName();
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var updateContentScrollTop = function (currentTop, deltaY) {
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var newTop = currentTop + deltaY,
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maxTop = containerHeight - scrollbarYHeight-10;
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if (newTop < 0) {
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scrollbarYTop = 0;
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}
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else if (newTop > maxTop) {
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scrollbarYTop = maxTop;
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}
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else {
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scrollbarYTop = newTop;
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}
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var scrollTop = parseInt(scrollbarYTop * (contentHeight - containerHeight) / (containerHeight - scrollbarYHeight), 10);
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$this.scrollTop(scrollTop);
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$scrollbarXRail.css({bottom: scrollbarXBottom - scrollTop});
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};
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var updateContentScrollLeft = function (currentLeft, deltaX) {
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var newLeft = currentLeft + deltaX,
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maxLeft = containerWidth - scrollbarXWidth;
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if (newLeft < 0) {
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scrollbarXLeft = 0;
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}
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else if (newLeft > maxLeft) {
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scrollbarXLeft = maxLeft;
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}
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else {
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scrollbarXLeft = newLeft;
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}
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var scrollLeft = parseInt(scrollbarXLeft * (contentWidth - containerWidth) / (containerWidth - scrollbarXWidth), 10);
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$this.scrollLeft(scrollLeft);
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$scrollbarYRail.css({right: scrollbarYRight - scrollLeft});
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};
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var getSettingsAdjustedThumbSize = function (thumbSize) {
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if (settings.minScrollbarLength) {
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thumbSize = Math.max(thumbSize, settings.minScrollbarLength);
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}
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return thumbSize;
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};
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var updateScrollbarCss = function () {
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$scrollbarXRail.css({left: $this.scrollLeft(), bottom: scrollbarXBottom - $this.scrollTop(), width: containerWidth, display: scrollbarXActive ? "inherit": "none"});
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$scrollbarYRail.css({top: $this.scrollTop(), right: scrollbarYRight - $this.scrollLeft(), height: containerHeight, display: scrollbarYActive ? "inherit": "none"});
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$scrollbarX.css({left: scrollbarXLeft, width: scrollbarXWidth});
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$scrollbarY.css({top: scrollbarYTop, height: scrollbarYHeight});
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};
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var updateBarSizeAndPosition = function () {
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var paddingdifferencewidth=($this.outerWidth()-$this.width())/2;
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var paddingdifferenceheight=($this.outerHeight()-$this.height())/2;
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containerWidth = settings.includePadding ? $this.outerWidth()-paddingdifferencewidth : $this.width();
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containerHeight = settings.includePadding ? $this.outerHeight()-paddingdifferenceheight : $this.height();
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contentWidth = $this.prop('scrollWidth')-paddingdifferencewidth;
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contentHeight = $this.prop('scrollHeight')-paddingdifferenceheight;
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if (!settings.suppressScrollX && containerWidth + settings.scrollXMarginOffset < contentWidth) {
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scrollbarXActive = true;
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scrollbarXWidth = getSettingsAdjustedThumbSize(parseInt(containerWidth * containerWidth / contentWidth, 10));
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scrollbarXLeft = parseInt($this.scrollLeft() * (containerWidth - scrollbarXWidth) / (contentWidth - containerWidth), 10);
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}
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else {
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scrollbarXActive = false;
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scrollbarXWidth = 0;
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scrollbarXLeft = 0;
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$this.scrollLeft(0);
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}
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if (!settings.suppressScrollY && containerHeight + settings.scrollYMarginOffset < contentHeight) {
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scrollbarYActive = true;
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scrollbarYHeight = getSettingsAdjustedThumbSize(parseInt(containerHeight * containerHeight / contentHeight, 10));
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scrollbarYTop = parseInt($this.scrollTop() * (containerHeight - scrollbarYHeight) / (contentHeight - containerHeight), 10);
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}
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else {
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scrollbarYActive = false;
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scrollbarYHeight = 0;
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scrollbarYTop = 0;
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$this.scrollTop(0);
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}
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if (scrollbarYTop >= containerHeight - scrollbarYHeight) {
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scrollbarYTop = containerHeight - scrollbarYHeight;
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}
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if (scrollbarXLeft >= containerWidth - scrollbarXWidth) {
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scrollbarXLeft = containerWidth - scrollbarXWidth;
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}
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updateScrollbarCss();
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};
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var bindMouseScrollXHandler = function () {
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var currentLeft,
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currentPageX;
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$scrollbarX.bind('mousedown' + eventClassName, function (e) {
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currentPageX = e.pageX;
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currentLeft = $scrollbarX.position().left;
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$scrollbarXRail.addClass('in-scrolling');
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e.stopPropagation();
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e.preventDefault();
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});
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$(document).bind('mousemove' + eventClassName, function (e) {
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if ($scrollbarXRail.hasClass('in-scrolling')) {
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updateContentScrollLeft(currentLeft, e.pageX - currentPageX);
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e.stopPropagation();
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e.preventDefault();
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}
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});
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$(document).bind('mouseup' + eventClassName, function (e) {
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if ($scrollbarXRail.hasClass('in-scrolling')) {
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$scrollbarXRail.removeClass('in-scrolling');
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}
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});
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currentLeft =
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currentPageX = null;
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};
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var bindMouseScrollYHandler = function () {
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var currentTop,
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currentPageY;
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$scrollbarY.bind('mousedown' + eventClassName, function (e) {
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currentPageY = e.pageY;
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currentTop = $scrollbarY.position().top;
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$scrollbarYRail.addClass('in-scrolling');
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e.stopPropagation();
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e.preventDefault();
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});
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$(document).bind('mousemove' + eventClassName, function (e) {
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if ($scrollbarYRail.hasClass('in-scrolling')) {
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updateContentScrollTop(currentTop, e.pageY - currentPageY);
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e.stopPropagation();
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e.preventDefault();
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}
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});
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$(document).bind('mouseup' + eventClassName, function (e) {
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if ($scrollbarYRail.hasClass('in-scrolling')) {
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$scrollbarYRail.removeClass('in-scrolling');
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}
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});
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currentTop =
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currentPageY = null;
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};
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// check if the default scrolling should be prevented.
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var shouldPreventDefault = function (deltaX, deltaY) {
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var scrollTop = $this.scrollTop();
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if (deltaX === 0) {
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if (!scrollbarYActive) {
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return false;
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}
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if ((scrollTop === 0 && deltaY > 0) || (scrollTop >= contentHeight - containerHeight && deltaY < 0)) {
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return !settings.wheelPropagation;
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}
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}
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var scrollLeft = $this.scrollLeft();
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if (deltaY === 0) {
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if (!scrollbarXActive) {
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return false;
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}
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if ((scrollLeft === 0 && deltaX < 0) || (scrollLeft >= contentWidth - containerWidth && deltaX > 0)) {
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return !settings.wheelPropagation;
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}
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}
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return true;
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};
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// bind handlers
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var bindMouseWheelHandler = function () {
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var shouldPrevent = false;
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$this.bind('mousewheel' + eventClassName, function (e, deprecatedDelta, deprecatedDeltaX, deprecatedDeltaY) {
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var deltaX = e.deltaX || deprecatedDeltaX,
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deltaY = e.deltaY || deprecatedDeltaY;
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if (!settings.useBothWheelAxes) {
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// deltaX will only be used for horizontal scrolling and deltaY will
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// only be used for vertical scrolling - this is the default
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$this.scrollTop($this.scrollTop() - (deltaY * settings.wheelSpeed));
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$this.scrollLeft($this.scrollLeft() + (deltaX * settings.wheelSpeed));
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} else if (scrollbarYActive && !scrollbarXActive) {
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// only vertical scrollbar is active and useBothWheelAxes option is
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// active, so let's scroll vertical bar using both mouse wheel axes
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if (deltaY) {
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$this.scrollTop($this.scrollTop() - (deltaY * settings.wheelSpeed));
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} else {
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$this.scrollTop($this.scrollTop() + (deltaX * settings.wheelSpeed));
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}
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} else if (scrollbarXActive && !scrollbarYActive) {
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// useBothWheelAxes and only horizontal bar is active, so use both
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// wheel axes for horizontal bar
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if (deltaX) {
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$this.scrollLeft($this.scrollLeft() + (deltaX * settings.wheelSpeed));
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} else {
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$this.scrollLeft($this.scrollLeft() - (deltaY * settings.wheelSpeed));
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}
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}
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// update bar position
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updateBarSizeAndPosition();
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shouldPrevent = shouldPreventDefault(deltaX, deltaY);
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if (shouldPrevent) {
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e.preventDefault();
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}
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});
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// fix Firefox scroll problem
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$this.bind('MozMousePixelScroll' + eventClassName, function (e) {
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if (shouldPrevent) {
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e.preventDefault();
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}
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});
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};
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var bindKeyboardHandler = function () {
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var hovered = false;
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$this.bind('mouseenter' + eventClassName, function (e) {
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hovered = true;
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});
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$this.bind('mouseleave' + eventClassName, function (e) {
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hovered = false;
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});
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var shouldPrevent = false;
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$(document).bind('keydown' + eventClassName, function (e) {
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if (!hovered || $(document.activeElement).is(":input,[contenteditable]")) {
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return;
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}
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var deltaX = 0,
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deltaY = 0;
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switch (e.which) {
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case 37: // left
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deltaX = -3;
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break;
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case 38: // up
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deltaY = 3;
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break;
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case 39: // right
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deltaX = 3;
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break;
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case 40: // down
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deltaY = -3;
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break;
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case 33: // page up
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deltaY = 9;
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break;
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case 32: // space bar
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case 34: // page down
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deltaY = -9;
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break;
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case 35: // end
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deltaY = -containerHeight;
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break;
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case 36: // home
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deltaY = containerHeight;
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break;
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default:
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return;
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}
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$this.scrollTop($this.scrollTop() - (deltaY * settings.wheelSpeed));
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$this.scrollLeft($this.scrollLeft() + (deltaX * settings.wheelSpeed));
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shouldPrevent = shouldPreventDefault(deltaX, deltaY);
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if (shouldPrevent) {
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e.preventDefault();
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}
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});
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};
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var bindRailClickHandler = function () {
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var stopPropagation = function (e) { e.stopPropagation(); };
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$scrollbarY.bind('click' + eventClassName, stopPropagation);
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$scrollbarYRail.bind('click' + eventClassName, function (e) {
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var halfOfScrollbarLength = parseInt(scrollbarYHeight / 2, 10),
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positionTop = e.pageY - $scrollbarYRail.offset().top - halfOfScrollbarLength,
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maxPositionTop = containerHeight - scrollbarYHeight,
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positionRatio = positionTop / maxPositionTop;
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if (positionRatio < 0) {
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positionRatio = 0;
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} else if (positionRatio > 1) {
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positionRatio = 1;
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}
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$this.scrollTop((contentHeight - containerHeight) * positionRatio);
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});
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$scrollbarX.bind('click' + eventClassName, stopPropagation);
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$scrollbarXRail.bind('click' + eventClassName, function (e) {
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var halfOfScrollbarLength = parseInt(scrollbarXWidth / 2, 10),
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positionLeft = e.pageX - $scrollbarXRail.offset().left - halfOfScrollbarLength,
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maxPositionLeft = containerWidth - scrollbarXWidth,
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positionRatio = positionLeft / maxPositionLeft;
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if (positionRatio < 0) {
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positionRatio = 0;
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} else if (positionRatio > 1) {
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positionRatio = 1;
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}
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$this.scrollLeft((contentWidth - containerWidth) * positionRatio);
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});
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};
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// bind mobile touch handler
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var bindMobileTouchHandler = function () {
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var applyTouchMove = function (differenceX, differenceY) {
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$this.scrollTop($this.scrollTop() - differenceY);
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$this.scrollLeft($this.scrollLeft() - differenceX);
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// update bar position
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updateBarSizeAndPosition();
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};
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var startCoords = {},
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startTime = 0,
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speed = {},
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breakingProcess = null,
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inGlobalTouch = false;
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$(window).bind("touchstart" + eventClassName, function (e) {
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inGlobalTouch = true;
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});
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$(window).bind("touchend" + eventClassName, function (e) {
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inGlobalTouch = false;
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});
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$this.bind("touchstart" + eventClassName, function (e) {
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var touch = e.originalEvent.targetTouches[0];
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startCoords.pageX = touch.pageX;
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startCoords.pageY = touch.pageY;
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startTime = (new Date()).getTime();
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if (breakingProcess !== null) {
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clearInterval(breakingProcess);
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}
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e.stopPropagation();
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});
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$this.bind("touchmove" + eventClassName, function (e) {
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if (!inGlobalTouch && e.originalEvent.targetTouches.length === 1) {
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var touch = e.originalEvent.targetTouches[0];
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var currentCoords = {};
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currentCoords.pageX = touch.pageX;
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currentCoords.pageY = touch.pageY;
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var differenceX = currentCoords.pageX - startCoords.pageX,
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differenceY = currentCoords.pageY - startCoords.pageY;
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applyTouchMove(differenceX, differenceY);
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startCoords = currentCoords;
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var currentTime = (new Date()).getTime();
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var timeGap = currentTime - startTime;
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if (timeGap > 0) {
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speed.x = differenceX / timeGap;
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speed.y = differenceY / timeGap;
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startTime = currentTime;
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}
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e.preventDefault();
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}
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});
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$this.bind("touchend" + eventClassName, function (e) {
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clearInterval(breakingProcess);
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breakingProcess = setInterval(function () {
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if (Math.abs(speed.x) < 0.01 && Math.abs(speed.y) < 0.01) {
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clearInterval(breakingProcess);
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return;
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}
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applyTouchMove(speed.x * 30, speed.y * 30);
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speed.x *= 0.8;
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speed.y *= 0.8;
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}, 10);
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});
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};
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var bindScrollHandler = function () {
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$this.bind('scroll' + eventClassName, function (e) {
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updateBarSizeAndPosition();
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});
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};
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var destroy = function () {
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$this.unbind(eventClassName);
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$(window).unbind(eventClassName);
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$(document).unbind(eventClassName);
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$this.data('perfect-scrollbar', null);
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$this.data('perfect-scrollbar-update', null);
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$this.data('perfect-scrollbar-destroy', null);
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$scrollbarX.remove();
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$scrollbarY.remove();
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$scrollbarXRail.remove();
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$scrollbarYRail.remove();
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// clean all variables
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$scrollbarX =
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$scrollbarY =
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containerWidth =
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containerHeight =
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contentWidth =
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contentHeight =
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scrollbarXWidth =
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scrollbarXLeft =
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scrollbarXBottom =
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scrollbarYHeight =
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scrollbarYTop =
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scrollbarYRight = null;
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};
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var ieSupport = function (version) {
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$this.addClass('ie').addClass('ie' + version);
|
|
|
|
var bindHoverHandlers = function () {
|
|
var mouseenter = function () {
|
|
$(this).addClass('hover');
|
|
|
|
};
|
|
var mouseleave = function () {
|
|
$(this).removeClass('hover');
|
|
};
|
|
$this.bind('mouseenter' + eventClassName, mouseenter).bind('mouseleave' + eventClassName, mouseleave);
|
|
$scrollbarXRail.bind('mouseenter' + eventClassName, mouseenter).bind('mouseleave' + eventClassName, mouseleave);
|
|
$scrollbarYRail.bind('mouseenter' + eventClassName, mouseenter).bind('mouseleave' + eventClassName, mouseleave);
|
|
$scrollbarX.bind('mouseenter' + eventClassName, mouseenter).bind('mouseleave' + eventClassName, mouseleave);
|
|
$scrollbarY.bind('mouseenter' + eventClassName, mouseenter).bind('mouseleave' + eventClassName, mouseleave);
|
|
};
|
|
|
|
var fixIe6ScrollbarPosition = function () {
|
|
updateScrollbarCss = function () {
|
|
$scrollbarX.css({left: scrollbarXLeft + $this.scrollLeft(), bottom: scrollbarXBottom, width: scrollbarXWidth});
|
|
$scrollbarY.css({top: scrollbarYTop + $this.scrollTop(), right: scrollbarYRight, height: scrollbarYHeight});
|
|
$scrollbarX.hide().show();
|
|
$scrollbarY.hide().show();
|
|
};
|
|
};
|
|
|
|
if (version === 6) {
|
|
bindHoverHandlers();
|
|
fixIe6ScrollbarPosition();
|
|
}
|
|
};
|
|
|
|
var supportsTouch = (('ontouchstart' in window) || window.DocumentTouch && document instanceof window.DocumentTouch);
|
|
|
|
var initialize = function () {
|
|
var ieMatch = navigator.userAgent.toLowerCase().match(/(msie) ([\w.]+)/);
|
|
if (ieMatch && ieMatch[1] === 'msie') {
|
|
// must be executed at first, because 'ieSupport' may addClass to the container
|
|
ieSupport(parseInt(ieMatch[2], 10));
|
|
}
|
|
|
|
updateBarSizeAndPosition();
|
|
bindScrollHandler();
|
|
bindMouseScrollXHandler();
|
|
bindMouseScrollYHandler();
|
|
bindRailClickHandler();
|
|
if (supportsTouch) {
|
|
bindMobileTouchHandler();
|
|
}
|
|
if ($this.mousewheel) {
|
|
bindMouseWheelHandler();
|
|
}
|
|
if (settings.useKeyboard) {
|
|
bindKeyboardHandler();
|
|
}
|
|
$this.data('perfect-scrollbar', $this);
|
|
$this.data('perfect-scrollbar-update', updateBarSizeAndPosition);
|
|
$this.data('perfect-scrollbar-destroy', destroy);
|
|
};
|
|
|
|
// initialize
|
|
initialize();
|
|
|
|
return $this;
|
|
});
|
|
};
|
|
})); |