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Diffstat (limited to 'external/jquery-mousewheel/jquery.mousewheel.js')
| -rw-r--r-- | external/jquery-mousewheel/jquery.mousewheel.js | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/external/jquery-mousewheel/jquery.mousewheel.js b/external/jquery-mousewheel/jquery.mousewheel.js new file mode 100644 index 000000000..aec55baf8 --- /dev/null +++ b/external/jquery-mousewheel/jquery.mousewheel.js @@ -0,0 +1,242 @@ +/*! + * jQuery Mousewheel 3.2.2 + * Copyright OpenJS Foundation and other contributors + */ + +( function( factory ) { + "use strict"; + + if ( typeof define === "function" && define.amd ) { + + // AMD. Register as an anonymous module. + define( [ "jquery" ], factory ); + } else if ( typeof exports === "object" ) { + + // Node/CommonJS style for Browserify + module.exports = factory; + } else { + + // Browser globals + factory( jQuery ); + } +} )( function( $ ) { + "use strict"; + + var nullLowestDeltaTimeout, lowestDelta, + modernEvents = !!$.fn.on, + toFix = [ "wheel", "mousewheel", "DOMMouseScroll", "MozMousePixelScroll" ], + toBind = ( "onwheel" in window.document || window.document.documentMode >= 9 ) ? + [ "wheel" ] : [ "mousewheel", "DomMouseScroll", "MozMousePixelScroll" ], + slice = Array.prototype.slice; + + if ( $.event.fixHooks ) { + for ( var i = toFix.length; i; ) { + $.event.fixHooks[ toFix[ --i ] ] = $.event.mouseHooks; + } + } + + var special = $.event.special.mousewheel = { + version: "3.2.2", + + setup: function() { + if ( this.addEventListener ) { + for ( var i = toBind.length; i; ) { + this.addEventListener( toBind[ --i ], handler, false ); + } + } else { + this.onmousewheel = handler; + } + + // Store the line height and page height for this particular element + $.data( this, "mousewheel-line-height", special.getLineHeight( this ) ); + $.data( this, "mousewheel-page-height", special.getPageHeight( this ) ); + }, + + teardown: function() { + if ( this.removeEventListener ) { + for ( var i = toBind.length; i; ) { + this.removeEventListener( toBind[ --i ], handler, false ); + } + } else { + this.onmousewheel = null; + } + + // Clean up the data we added to the element + $.removeData( this, "mousewheel-line-height" ); + $.removeData( this, "mousewheel-page-height" ); + }, + + getLineHeight: function( elem ) { + var $elem = $( elem ), + $parent = $elem[ "offsetParent" in $.fn ? "offsetParent" : "parent" ](); + if ( !$parent.length ) { + $parent = $( "body" ); + } + return parseInt( $parent.css( "fontSize" ), 10 ) || + parseInt( $elem.css( "fontSize" ), 10 ) || 16; + }, + + getPageHeight: function( elem ) { + return $( elem ).height(); + }, + + settings: { + adjustOldDeltas: true, // see shouldAdjustOldDeltas() below + normalizeOffset: true // calls getBoundingClientRect for each event + } + }; + + $.fn.extend( { + mousewheel: function( fn ) { + return fn ? + this[ modernEvents ? "on" : "bind" ]( "mousewheel", fn ) : + this.trigger( "mousewheel" ); + }, + + unmousewheel: function( fn ) { + return this[ modernEvents ? "off" : "unbind" ]( "mousewheel", fn ); + } + } ); + + + function handler( event ) { + var orgEvent = event || window.event, + args = slice.call( arguments, 1 ), + delta = 0, + deltaX = 0, + deltaY = 0, + absDelta = 0; + event = $.event.fix( orgEvent ); + event.type = "mousewheel"; + + // Old school scrollwheel delta + if ( "detail" in orgEvent ) { + deltaY = orgEvent.detail * -1; + } + if ( "wheelDelta" in orgEvent ) { + deltaY = orgEvent.wheelDelta; + } + if ( "wheelDeltaY" in orgEvent ) { + deltaY = orgEvent.wheelDeltaY; + } + if ( "wheelDeltaX" in orgEvent ) { + deltaX = orgEvent.wheelDeltaX * -1; + } + + // Firefox < 17 horizontal scrolling related to DOMMouseScroll event + if ( "axis" in orgEvent && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) { + deltaX = deltaY * -1; + deltaY = 0; + } + + // Set delta to be deltaY or deltaX if deltaY is 0 for backwards compatability + delta = deltaY === 0 ? deltaX : deltaY; + + // New school wheel delta (wheel event) + if ( "deltaY" in orgEvent ) { + deltaY = orgEvent.deltaY * -1; + delta = deltaY; + } + if ( "deltaX" in orgEvent ) { + deltaX = orgEvent.deltaX; + if ( deltaY === 0 ) { + delta = deltaX * -1; + } + } + + // No change actually happened, no reason to go any further + if ( deltaY === 0 && deltaX === 0 ) { + return; + } + + // Need to convert lines and pages to pixels if we aren't already in pixels + // There are three delta modes: + // * deltaMode 0 is by pixels, nothing to do + // * deltaMode 1 is by lines + // * deltaMode 2 is by pages + if ( orgEvent.deltaMode === 1 ) { + var lineHeight = $.data( this, "mousewheel-line-height" ); + delta *= lineHeight; + deltaY *= lineHeight; + deltaX *= lineHeight; + } else if ( orgEvent.deltaMode === 2 ) { + var pageHeight = $.data( this, "mousewheel-page-height" ); + delta *= pageHeight; + deltaY *= pageHeight; + deltaX *= pageHeight; + } + + // Store lowest absolute delta to normalize the delta values + absDelta = Math.max( Math.abs( deltaY ), Math.abs( deltaX ) ); + + if ( !lowestDelta || absDelta < lowestDelta ) { + lowestDelta = absDelta; + + // Adjust older deltas if necessary + if ( shouldAdjustOldDeltas( orgEvent, absDelta ) ) { + lowestDelta /= 40; + } + } + + // Adjust older deltas if necessary + if ( shouldAdjustOldDeltas( orgEvent, absDelta ) ) { + + // Divide all the things by 40! + delta /= 40; + deltaX /= 40; + deltaY /= 40; + } + + // Get a whole, normalized value for the deltas + delta = Math[ delta >= 1 ? "floor" : "ceil" ]( delta / lowestDelta ); + deltaX = Math[ deltaX >= 1 ? "floor" : "ceil" ]( deltaX / lowestDelta ); + deltaY = Math[ deltaY >= 1 ? "floor" : "ceil" ]( deltaY / lowestDelta ); + + // Normalise offsetX and offsetY properties + if ( special.settings.normalizeOffset && this.getBoundingClientRect ) { + var boundingRect = this.getBoundingClientRect(); + event.offsetX = event.clientX - boundingRect.left; + event.offsetY = event.clientY - boundingRect.top; + } + + // Add information to the event object + event.deltaX = deltaX; + event.deltaY = deltaY; + event.deltaFactor = lowestDelta; + + // Go ahead and set deltaMode to 0 since we converted to pixels + // Although this is a little odd since we overwrite the deltaX/Y + // properties with normalized deltas. + event.deltaMode = 0; + + // Add event and delta to the front of the arguments + args.unshift( event, delta, deltaX, deltaY ); + + // Clear out lowestDelta after sometime to better + // handle multiple device types that give different + // a different lowestDelta + // Ex: trackpad = 3 and mouse wheel = 120 + if ( nullLowestDeltaTimeout ) { + window.clearTimeout( nullLowestDeltaTimeout ); + } + nullLowestDeltaTimeout = window.setTimeout( function() { + lowestDelta = null; + }, 200 ); + + return ( $.event.dispatch || $.event.handle ).apply( this, args ); + } + + function shouldAdjustOldDeltas( orgEvent, absDelta ) { + + // If this is an older event and the delta is divisible by 120, + // then we are assuming that the browser is treating this as an + // older mouse wheel event and that we should divide the deltas + // by 40 to try and get a more usable deltaFactor. + // Side note, this actually impacts the reported scroll distance + // in older browsers and can cause scrolling to be slower than native. + // Turn this off by setting $.event.special.mousewheel.settings.adjustOldDeltas to false. + return special.settings.adjustOldDeltas && orgEvent.type === "mousewheel" && + absDelta % 120 === 0; + } + +} ); |