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Migrate scrollHelper to ES6

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MrTimscampi 2020-07-26 22:52:55 +02:00
parent 8fb8dacdf1
commit 4fce7f8be5
18 changed files with 150 additions and 128 deletions
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250
src/scripts/scrollHelper.js
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@ -1,137 +1,137 @@
define(['focusManager', 'dom', 'scrollStyles'], function (focusManager, dom) {
'use strict';
import focusManager from 'focusManager';
import dom from 'dom';
import 'scrollStyles';
function getBoundingClientRect(elem) {
function getBoundingClientRect(elem) {
// Support: BlackBerry 5, iOS 3 (original iPhone)
// If we don't have gBCR, just use 0,0 rather than error
if (elem.getBoundingClientRect) {
return elem.getBoundingClientRect();
} else {
return { top: 0, left: 0 };
}
// Support: BlackBerry 5, iOS 3 (original iPhone)
// If we don't have gBCR, just use 0,0 rather than error
if (elem.getBoundingClientRect) {
return elem.getBoundingClientRect();
} else {
return { top: 0, left: 0 };
}
}
export function getPosition(scrollContainer, item, horizontal) {
const slideeOffset = getBoundingClientRect(scrollContainer);
const itemOffset = getBoundingClientRect(item);
let offset = horizontal ? itemOffset.left - slideeOffset.left : itemOffset.top - slideeOffset.top;
let size = horizontal ? itemOffset.width : itemOffset.height;
if (!size && size !== 0) {
size = item[horizontal ? 'offsetWidth' : 'offsetHeight'];
}
function getPosition(scrollContainer, item, horizontal) {
const currentStart = horizontal ? scrollContainer.scrollLeft : scrollContainer.scrollTop;
var slideeOffset = getBoundingClientRect(scrollContainer);
var itemOffset = getBoundingClientRect(item);
offset += currentStart;
var offset = horizontal ? itemOffset.left - slideeOffset.left : itemOffset.top - slideeOffset.top;
var size = horizontal ? itemOffset.width : itemOffset.height;
if (!size && size !== 0) {
size = item[horizontal ? 'offsetWidth' : 'offsetHeight'];
}
const frameSize = horizontal ? scrollContainer.offsetWidth : scrollContainer.offsetHeight;
var currentStart = horizontal ? scrollContainer.scrollLeft : scrollContainer.scrollTop;
const currentEnd = currentStart + frameSize;
offset += currentStart;
var frameSize = horizontal ? scrollContainer.offsetWidth : scrollContainer.offsetHeight;
var currentEnd = currentStart + frameSize;
var isVisible = offset >= currentStart && (offset + size) <= currentEnd;
return {
start: offset,
center: (offset - (frameSize / 2) + (size / 2)),
end: offset - frameSize + size,
size: size,
isVisible: isVisible
};
}
function toCenter(container, elem, horizontal, skipWhenVisible) {
var pos = getPosition(container, elem, horizontal);
if (skipWhenVisible && pos.isVisible) {
return;
}
if (container.scrollTo) {
if (horizontal) {
container.scrollTo(pos.center, 0);
} else {
container.scrollTo(0, pos.center);
}
} else {
if (horizontal) {
container.scrollLeft = Math.round(pos.center);
} else {
container.scrollTop = Math.round(pos.center);
}
}
}
function toStart(container, elem, horizontal, skipWhenVisible) {
var pos = getPosition(container, elem, horizontal);
if (skipWhenVisible && pos.isVisible) {
return;
}
if (container.scrollTo) {
if (horizontal) {
container.scrollTo(pos.start, 0);
} else {
container.scrollTo(0, pos.start);
}
} else {
if (horizontal) {
container.scrollLeft = Math.round(pos.start);
} else {
container.scrollTop = Math.round(pos.start);
}
}
}
function centerOnFocus(e, scrollSlider, horizontal) {
var focused = focusManager.focusableParent(e.target);
if (focused) {
toCenter(scrollSlider, focused, horizontal);
}
}
function centerOnFocusHorizontal(e) {
centerOnFocus(e, this, true);
}
function centerOnFocusVertical(e) {
centerOnFocus(e, this, false);
}
const isVisible = offset >= currentStart && (offset + size) <= currentEnd;
return {
getPosition: getPosition,
centerFocus: {
on: function (element, horizontal) {
if (horizontal) {
dom.addEventListener(element, 'focus', centerOnFocusHorizontal, {
capture: true,
passive: true
});
} else {
dom.addEventListener(element, 'focus', centerOnFocusVertical, {
capture: true,
passive: true
});
}
},
off: function (element, horizontal) {
if (horizontal) {
dom.removeEventListener(element, 'focus', centerOnFocusHorizontal, {
capture: true,
passive: true
});
} else {
dom.removeEventListener(element, 'focus', centerOnFocusVertical, {
capture: true,
passive: true
});
}
start: offset,
center: (offset - (frameSize / 2) + (size / 2)),
end: offset - frameSize + size,
size: size,
isVisible: isVisible
};
}
export function toCenter(container, elem, horizontal, skipWhenVisible) {
const pos = getPosition(container, elem, horizontal);
if (skipWhenVisible && pos.isVisible) {
return;
}
if (container.scrollTo) {
if (horizontal) {
container.scrollTo(pos.center, 0);
} else {
container.scrollTo(0, pos.center);
}
} else {
if (horizontal) {
container.scrollLeft = Math.round(pos.center);
} else {
container.scrollTop = Math.round(pos.center);
}
}
}
export function toStart(container, elem, horizontal, skipWhenVisible) {
const pos = getPosition(container, elem, horizontal);
if (skipWhenVisible && pos.isVisible) {
return;
}
if (container.scrollTo) {
if (horizontal) {
container.scrollTo(pos.start, 0);
} else {
container.scrollTo(0, pos.start);
}
} else {
if (horizontal) {
container.scrollLeft = Math.round(pos.start);
} else {
container.scrollTop = Math.round(pos.start);
}
}
}
function centerOnFocus(e, scrollSlider, horizontal) {
const focused = focusManager.focusableParent(e.target);
if (focused) {
toCenter(scrollSlider, focused, horizontal);
}
}
function centerOnFocusHorizontal(e) {
centerOnFocus(e, this, true);
}
function centerOnFocusVertical(e) {
centerOnFocus(e, this, false);
}
export default {
getPosition: getPosition,
centerFocus: {
on: function (element, horizontal) {
if (horizontal) {
dom.addEventListener(element, 'focus', centerOnFocusHorizontal, {
capture: true,
passive: true
});
} else {
dom.addEventListener(element, 'focus', centerOnFocusVertical, {
capture: true,
passive: true
});
}
},
toCenter: toCenter,
toStart: toStart
};
});
off: function (element, horizontal) {
if (horizontal) {
dom.removeEventListener(element, 'focus', centerOnFocusHorizontal, {
capture: true,
passive: true
});
} else {
dom.removeEventListener(element, 'focus', centerOnFocusVertical, {
capture: true,
passive: true
});
}
}
},
toCenter: toCenter,
toStart: toStart
};