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Fixes #71

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Fixes #71

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255 changes: 148 additions & 107 deletions js/mylibs/enscroll.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,14 @@
* http://enscrollplugin.com/license.html
**/


/**
* Updated many times by: Mohammad AlBanna
* Website: MBanna.me
**/
;(function( $, win, doc, undefined ) {


var defaultSettings = {
verticalScrolling: true,
horizontalScrolling: false,
Expand Down Expand Up @@ -113,6 +119,7 @@
},

showScrollbars = function( scheduleHide ) {

var data = $( this ).data( 'enscroll' ),
that = this,
settings = data.settings,
Expand Down Expand Up @@ -171,6 +178,7 @@
},

scrollHorizontal = function( pane, dx ) {

var $pane = $( pane ),
data = $pane.data( 'enscroll' ),
x0 = $pane.scrollLeft();
Expand All @@ -182,100 +190,6 @@
}
},

scrollAnimate = function( $pane ) {
var data = $pane.data( 'enscroll' ),
d = data._duration,
c, curPos, t;

if ( data._scrollingX === true ) {
c = data._endX - data._startX;
if ( c === 0 ) {
data._scrollingX = false;
} else {
curPos = $pane.scrollLeft();
t = timeFromPosition( data._startX, c, d, curPos );
if ( c > 0 ) {
if ( curPos >= data._endX || curPos < data._startX ) {
data._scrollingX = false;
} else {
scrollHorizontal( $pane,
Math.max( 1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
} else {
if ( curPos <= data._endX || curPos > data._startX ) {
data._scrollingX = false;
} else {
scrollHorizontal( $pane,
Math.min( -1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
}
}
}

if ( data._scrollingY === true ) {
c = data._endY - data._startY;
if ( c === 0 ) {
data._scrollingY = false;
} else {
curPos = $pane.scrollTop();
t = timeFromPosition( data._startY, c, d, curPos );
if ( c > 0 ) {
if ( curPos >= data._endY || curPos < data._startY ) {
data._scrollingY = false;
} else {
scrollVertical( $pane,
Math.max( 1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
} else {
if ( curPos <= data._endY || curPos > data._startY ) {
data._scrollingY = false;
} else {
scrollVertical( $pane,
Math.min( -1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
}
}
}
},

paneScrolled = function() {
var $this = $( this ),
data = $this.data( 'enscroll' ),
handle, track, pct;

if ( data ) {
if ( data.settings.verticalScrolling ) {
track = $( data.verticalTrackWrapper ).find( '.enscroll-track' )[0];
handle = track.firstChild;
pct = $this.scrollTop() / ( this.scrollHeight - (data._scrollHeightNoPadding ? $this.height() : $this.innerHeight()));
pct = isNaN( pct ) ? 0 : pct;

handle.style.top = ( pct * ( $( track ).height() - $( handle ).outerHeight() )) + 'px';
}

if ( data.settings.horizontalScrolling ) {
track = $( data.horizontalTrackWrapper ).find( '.enscroll-track' )[0];
handle = track.firstChild;
pct = $this.scrollLeft() / ( this.scrollWidth - $this.innerWidth() );
pct = isNaN( pct ) ? 0 : pct;

handle.style.left = ( pct * ( $( track ).width() - $( handle ).innerWidth() )) + 'px';
}
}
},

startVerticalDrag = function( event ) {
// only handle events for left mouse button dragging
if ( event.which !== 1 ) {
Expand Down Expand Up @@ -454,6 +368,7 @@
handle = $track.children().first()[0];
handleX = parseInt( handle.style.left, 10 );
paneDiff = pane.scrollWidth - $( pane ).innerWidth();

mouseXOffset = event.clientX - $( handle ).offset().left;
trackDiff = $track.width() - $( handle ).outerWidth();
trackXOffset = $track.offset().left;
Expand Down Expand Up @@ -485,11 +400,81 @@

},

scrollAnimate = function( $pane ) {
var data = $pane.data( 'enscroll' ),
d = data._duration,
c, curPos, t;

if ( data._scrollingX === true ) {
c = data._endX - data._startX;
if ( c === 0 ) {
data._scrollingX = false;
} else {
curPos = $pane.scrollLeft();
t = timeFromPosition( data._startX, c, d, curPos );
if ( c > 0 ) {
if ( curPos >= data._endX || curPos < data._startX ) {
data._scrollingX = false;
} else {
scrollHorizontal( $pane,
Math.max( 1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
} else {
if ( curPos <= data._endX || curPos > data._startX ) {
data._scrollingX = false;
} else {
scrollHorizontal( $pane,
Math.min( -1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
}
}
}

if ( data._scrollingY === true ) {
c = data._endY - data._startY;
if ( c === 0 ) {
data._scrollingY = false;
} else {
curPos = $pane.scrollTop();
t = timeFromPosition( data._startY, c, d, curPos );
if ( c > 0 ) {
if ( curPos >= data._endY || curPos < data._startY ) {
data._scrollingY = false;
} else {
scrollVertical( $pane,
Math.max( 1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
} else {
if ( curPos <= data._endY || curPos > data._startY ) {
data._scrollingY = false;
} else {
scrollVertical( $pane,
Math.min( -1, easeOutSin( c, d, t )));
reqAnimFrame( function() {
scrollAnimate( $pane );
});
}
}
}
}

},

scrollAnimateHorizontal = function( $pane, delta ) {
var data = $pane.data( 'enscroll' ),
curPos = $pane.scrollLeft(),
scrollMax = $pane[0].scrollWidth - $pane.innerWidth();


if ( !data.settings.horizontalScrolling || data._scrollingY ) {
return false;
}
Expand Down Expand Up @@ -546,19 +531,45 @@
0,
delta;

if ( Math.abs( deltaX ) > Math.abs( deltaY ) && deltaX !== 0 ) {
if ( Math.abs( deltaX ) > Math.abs( deltaY )) {
delta = ( deltaX > 0 ? -scrollIncrement : scrollIncrement ) << 2;
if ( scrollAnimateHorizontal( $pane, delta ) || !data.settings.propagateWheelEvent ) {
preventDefault( event );
}
} else if ( deltaY !== 0 ) {
} else {
delta = ( deltaY > 0 ? -scrollIncrement : scrollIncrement ) << 2;
if ( scrollAnimateVertical( $pane, delta ) || !data.settings.propagateWheelEvent ) {
if (deltaY != 0 && (scrollAnimateVertical( $pane, delta ) || !data.settings.propagateWheelEvent) ) {
preventDefault( event );
}
}
},

paneScrolled = function() {
var $this = $( this ),
data = $this.data( 'enscroll' ),
handle, track, pct;

if ( data ) {
if ( data.settings.verticalScrolling ) {
track = $( data.verticalTrackWrapper ).find( '.enscroll-track' )[0];
handle = track.firstChild;
pct = $this.scrollTop() / ( this.scrollHeight - (data._scrollHeightNoPadding ? $this.height() : $this.innerHeight()));
pct = isNaN( pct ) ? 0 : pct;

handle.style.top = ( pct * ( $( track ).height() - $( handle ).outerHeight() )) + 'px';
}

if ( data.settings.horizontalScrolling ) {
track = $( data.horizontalTrackWrapper ).find( '.enscroll-track' )[0];
handle = track.firstChild;
pct = $this.scrollLeft() / ( this.scrollWidth - $this.innerWidth() );
pct = isNaN( pct ) ? 0 : pct;

handle.style.left = ( pct * ( $( track ).width() - $( handle ).innerWidth() )) + 'px';
}
}
},

keyHandler = function( event ) {
var $this = $( this ),
data = $this.data( 'enscroll' ),
Expand Down Expand Up @@ -789,12 +800,24 @@
track = $( trackWrapper ).find( '.enscroll-track' )[0];
$scrollUpBtn = $( trackWrapper ).find( '.' + settings.scrollUpButtonClass );
$scrollDownBtn = $(trackWrapper).find( '.' + settings.scrollDownButtonClass );

//Updated by Mohammad AlBanna
//MBanna.me
//Check if the array has elements, empty array returns undefined value when trying to get width/height in jQuery >= 3.0
//**********//
$scrollUpBtnHeight = 0;
$scrollDownBtnHeight = 0;

if($scrollUpBtn.length != 0){
$scrollUpBtnHeight = $scrollUpBtn[0].outerHeight();
}
if($scrollDownBtn.length != 0){
$scrollDownBtnHeight = $scrollDownBtn[0].outerHeight();
}

trackHeight = settings.horizontalScrolling ?
paneHeight - $( data.horizontalTrackWrapper ).find( '.enscroll-track' ).outerHeight() :
paneHeight;
trackHeight -= $( track ).outerHeight() - $( track ).height() + $scrollUpBtn.outerHeight() + $scrollDownBtn.outerHeight();

trackHeight = paneHeight;
trackHeight -= $( track ).outerHeight() - $( track ).height() + $scrollUpBtnHeight + $scrollDownBtnHeight;
//**********//
handle = track.firstChild;
handleHeight = Math.max( pct * trackHeight,
settings.minScrollbarLength );
Expand All @@ -821,11 +844,25 @@
$scrollLeftBtn = $( trackWrapper ).find( '.' + settings.scrollLeftButtonClass );
$scrollRightBtn = $( trackWrapper ).find( '.' + settings.scrollRightButtonClass );

//Updated by Mohammad AlBanna
//MBanna.me
//Check if the array has elements, empty array returns undefined value when trying to get width/height in jQuery >= 3.0
//**********//
$scrollLeftBtnWidth = 0;
$scrollRightBtnWidth = 0;

if($scrollUpBtn.length != 0){
$scrollLeftBtnWidth = $scrollUpBtn[0].outerWidth();
}
if($scrollDownBtn.length != 0){
$scrollRightBtnWidth = $scrollDownBtn[0].outerWidth();
}

trackWidth = settings.verticalScrolling ?
paneWidth - $( data.verticalTrackWrapper ).find( '.enscroll-track' ).outerWidth() :
paneWidth;
trackWidth -= $( track ).outerWidth() - $( track ).width() + $scrollLeftBtn.outerWidth() + $scrollRightBtn.outerWidth();

trackWidth -= $( track ).outerWidth() - $( track ).width() + $scrollLeftBtnWidth + $scrollRightBtnWidth;
//**********//
handle = track.firstChild;
handleWidth = Math.max( pct * trackWidth,
settings.minScrollbarLength);
Expand All @@ -843,9 +880,12 @@

if ( data._prybar ) {
prybar = data._prybar;
this.removeChild( prybar );
if (prybar.parentNode != null) {
prybar.parentNode.removeChild(prybar);
}

if ( settings.verticalScrolling ) {
prybar.style.width = ( this.scrollWidth + $( data.verticalTrackWrapper ).find( '.enscroll-track' ).outerWidth()) + 'px';
prybar.style.width = ( this.scrollWidth) + 'px';
this.appendChild( prybar );
}
}
Expand Down Expand Up @@ -1170,6 +1210,7 @@
// if we want horizontal scrolling, create the elements for and
// initialize the horizontal track and handle
if ( settings.horizontalScrolling ) {

horizontalTrackWrapper = doc.createElement( 'div' );
horizontalTrack = doc.createElement( 'div' );
horizontalHandle = doc.createElement( 'a' );
Expand Down Expand Up @@ -1370,4 +1411,4 @@

};

}( jQuery, window, document ));
}( jQuery, window, document ));