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// prev/next buttons
( function( window, factory ) {
// universal module definition
/* jshint strict: false */
if ( typeof define == 'function' && define.amd ) {
// AMD
define( [
'./flickity',
'tap-listener/tap-listener',
'fizzy-ui-utils/utils'
], function( Flickity, TapListener, utils ) {
return factory( window, Flickity, TapListener, utils );
});
} else if ( typeof module == 'object' && module.exports ) {
// CommonJS
module.exports = factory(
window,
require('./flickity'),
require('tap-listener'),
require('fizzy-ui-utils')
);
} else {
// browser global
factory(
window,
window.Flickity,
window.TapListener,
window.fizzyUIUtils
);
}
}( window, function factory( window, Flickity, TapListener, utils ) {
'use strict';
var svgURI = 'http://www.w3.org/2000/svg';
// -------------------------- PrevNextButton -------------------------- //
function PrevNextButton( direction, parent ) {
this.direction = direction;
this.parent = parent;
this._create();
}
PrevNextButton.prototype = new TapListener();
PrevNextButton.prototype._create = function() {
// properties
this.isEnabled = true;
this.isPrevious = this.direction == -1;
var leftDirection = this.parent.options.rightToLeft ? 1 : -1;
this.isLeft = this.direction == leftDirection;
var element = this.element = document.createElement('button');
element.className = 'flickity-prev-next-button';
element.className += this.isPrevious ? ' previous' : ' next';
// prevent button from submitting form http://stackoverflow.com/a/10836076/182183
element.setAttribute( 'type', 'button' );
// init as disabled
this.disable();
element.setAttribute( 'aria-label', this.isPrevious ? 'previous' : 'next' );
// create arrow
var svg = this.createSVG();
element.appendChild( svg );
// events
this.on( 'tap', this.onTap );
this.parent.on( 'select', this.update.bind( this ) );
this.on( 'pointerDown', this.parent.childUIPointerDown.bind( this.parent ) );
};
PrevNextButton.prototype.activate = function() {
this.bindTap( this.element );
// click events from keyboard
this.element.addEventListener( 'click', this );
// add to DOM
this.parent.element.appendChild( this.element );
};
PrevNextButton.prototype.deactivate = function() {
// remove from DOM
this.parent.element.removeChild( this.element );
// do regular TapListener destroy
TapListener.prototype.destroy.call( this );
// click events from keyboard
this.element.removeEventListener( 'click', this );
};
PrevNextButton.prototype.createSVG = function() {
var svg = document.createElementNS( svgURI, 'svg');
svg.setAttribute( 'viewBox', '0 0 100 100' );
var path = document.createElementNS( svgURI, 'path');
var pathMovements = getArrowMovements( this.parent.options.arrowShape );
path.setAttribute( 'd', pathMovements );
path.setAttribute( 'class', 'arrow' );
// rotate arrow
if ( !this.isLeft ) {
path.setAttribute( 'transform', 'translate(100, 100) rotate(180) ' );
}
svg.appendChild( path );
return svg;
};
// get SVG path movmement
function getArrowMovements( shape ) {
// use shape as movement if string
if ( typeof shape == 'string' ) {
return shape;
}
// create movement string
return 'M ' + shape.x0 + ',50' +
' L ' + shape.x1 + ',' + ( shape.y1 + 50 ) +
' L ' + shape.x2 + ',' + ( shape.y2 + 50 ) +
' L ' + shape.x3 + ',50 ' +
' L ' + shape.x2 + ',' + ( 50 - shape.y2 ) +
' L ' + shape.x1 + ',' + ( 50 - shape.y1 ) +
' Z';
}
PrevNextButton.prototype.onTap = function() {
if ( !this.isEnabled ) {
return;
}
this.parent.uiChange();
var method = this.isPrevious ? 'previous' : 'next';
this.parent[ method ]();
};
PrevNextButton.prototype.handleEvent = utils.handleEvent;
PrevNextButton.prototype.onclick = function() {
// only allow clicks from keyboard
var focused = document.activeElement;
if ( focused && focused == this.element ) {
this.onTap();
}
};
// ----- ----- //
PrevNextButton.prototype.enable = function() {
if ( this.isEnabled ) {
return;
}
this.element.disabled = false;
this.isEnabled = true;
};
PrevNextButton.prototype.disable = function() {
if ( !this.isEnabled ) {
return;
}
this.element.disabled = true;
this.isEnabled = false;
};
PrevNextButton.prototype.update = function() {
// index of first or last slide, if previous or next
var slides = this.parent.slides;
// enable is wrapAround and at least 2 slides
if ( this.parent.options.wrapAround && slides.length > 1 ) {
this.enable();
return;
}
var lastIndex = slides.length ? slides.length - 1 : 0;
var boundIndex = this.isPrevious ? 0 : lastIndex;
var method = this.parent.selectedIndex == boundIndex ? 'disable' : 'enable';
this[ method ]();
};
PrevNextButton.prototype.destroy = function() {
this.deactivate();
};
// -------------------------- Flickity prototype -------------------------- //
utils.extend( Flickity.defaults, {
prevNextButtons: true,
arrowShape: {
x0: 10,
x1: 60, y1: 50,
x2: 70, y2: 40,
x3: 30
}
});
Flickity.createMethods.push('_createPrevNextButtons');
var proto = Flickity.prototype;
proto._createPrevNextButtons = function() {
if ( !this.options.prevNextButtons ) {
return;
}
this.prevButton = new PrevNextButton( -1, this );
this.nextButton = new PrevNextButton( 1, this );
this.on( 'activate', this.activatePrevNextButtons );
};
proto.activatePrevNextButtons = function() {
this.prevButton.activate();
this.nextButton.activate();
this.on( 'deactivate', this.deactivatePrevNextButtons );
};
proto.deactivatePrevNextButtons = function() {
this.prevButton.deactivate();
this.nextButton.deactivate();
this.off( 'deactivate', this.deactivatePrevNextButtons );
};
// -------------------------- -------------------------- //
Flickity.PrevNextButton = PrevNextButton;
return Flickity;
}));
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