scratch – Rev 117
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/*=========================
Keyboard Control
===========================*/
function handleKeyboard(e) {
if (e.originalEvent) e = e.originalEvent; //jquery fix
var kc = e.keyCode || e.charCode;
// Directions locks
if (!s.params.allowSwipeToNext && (s.isHorizontal() && kc === 39 || !s.isHorizontal() && kc === 40)) {
return false;
}
if (!s.params.allowSwipeToPrev && (s.isHorizontal() && kc === 37 || !s.isHorizontal() && kc === 38)) {
return false;
}
if (e.shiftKey || e.altKey || e.ctrlKey || e.metaKey) {
return;
}
if (document.activeElement && document.activeElement.nodeName && (document.activeElement.nodeName.toLowerCase() === 'input' || document.activeElement.nodeName.toLowerCase() === 'textarea')) {
return;
}
if (kc === 37 || kc === 39 || kc === 38 || kc === 40) {
var inView = false;
//Check that swiper should be inside of visible area of window
if (s.container.parents('.' + s.params.slideClass).length > 0 && s.container.parents('.' + s.params.slideActiveClass).length === 0) {
return;
}
var windowScroll = {
left: window.pageXOffset,
top: window.pageYOffset
};
var windowWidth = window.innerWidth;
var windowHeight = window.innerHeight;
var swiperOffset = s.container.offset();
if (s.rtl) swiperOffset.left = swiperOffset.left - s.container[0].scrollLeft;
var swiperCoord = [
[swiperOffset.left, swiperOffset.top],
[swiperOffset.left + s.width, swiperOffset.top],
[swiperOffset.left, swiperOffset.top + s.height],
[swiperOffset.left + s.width, swiperOffset.top + s.height]
];
for (var i = 0; i < swiperCoord.length; i++) {
var point = swiperCoord[i];
if (
point[0] >= windowScroll.left && point[0] <= windowScroll.left + windowWidth &&
point[1] >= windowScroll.top && point[1] <= windowScroll.top + windowHeight
) {
inView = true;
}
}
if (!inView) return;
}
if (s.isHorizontal()) {
if (kc === 37 || kc === 39) {
if (e.preventDefault) e.preventDefault();
else e.returnValue = false;
}
if ((kc === 39 && !s.rtl) || (kc === 37 && s.rtl)) s.slideNext();
if ((kc === 37 && !s.rtl) || (kc === 39 && s.rtl)) s.slidePrev();
}
else {
if (kc === 38 || kc === 40) {
if (e.preventDefault) e.preventDefault();
else e.returnValue = false;
}
if (kc === 40) s.slideNext();
if (kc === 38) s.slidePrev();
}
s.emit('onKeyPress', s, kc);
}
s.disableKeyboardControl = function () {
s.params.keyboardControl = false;
$(document).off('keydown', handleKeyboard);
};
s.enableKeyboardControl = function () {
s.params.keyboardControl = true;
$(document).on('keydown', handleKeyboard);
};