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import { getRect, css, matrix, isRectEqual, indexOfObject } from './utils.js';
import Sortable from './Sortable.js';
export default function AnimationStateManager() {
let animationStates = [],
animationCallbackId;
return {
captureAnimationState() {
animationStates = [];
if (!this.options.animation) return;
let children = [].slice.call(this.el.children);
children.forEach(child => {
if (css(child, 'display') === 'none' || child === Sortable.ghost) return;
animationStates.push({
target: child,
rect: getRect(child)
});
let fromRect = { ...animationStates[animationStates.length - 1].rect };
// If animating: compensate for current animation
if (child.thisAnimationDuration) {
let childMatrix = matrix(child, true);
if (childMatrix) {
fromRect.top -= childMatrix.f;
fromRect.left -= childMatrix.e;
}
}
child.fromRect = fromRect;
});
},
addAnimationState(state) {
animationStates.push(state);
},
removeAnimationState(target) {
animationStates.splice(indexOfObject(animationStates, { target }), 1);
},
animateAll(callback) {
if (!this.options.animation) {
clearTimeout(animationCallbackId);
if (typeof(callback) === 'function') callback();
return;
}
let animating = false,
animationTime = 0;
animationStates.forEach((state) => {
let time = 0,
animatingThis = false,
target = state.target,
fromRect = target.fromRect,
toRect = getRect(target),
prevFromRect = target.prevFromRect,
prevToRect = target.prevToRect,
animatingRect = state.rect,
targetMatrix = matrix(target, true);
if (targetMatrix) {
// Compensate for current animation
toRect.top -= targetMatrix.f;
toRect.left -= targetMatrix.e;
}
target.toRect = toRect;
if (target.thisAnimationDuration) {
// Could also check if animatingRect is between fromRect and toRect
if (
isRectEqual(prevFromRect, toRect) &&
!isRectEqual(fromRect, toRect) &&
// Make sure animatingRect is on line between toRect & fromRect
(animatingRect.top - toRect.top) /
(animatingRect.left - toRect.left) ===
(fromRect.top - toRect.top) /
(fromRect.left - toRect.left)
) {
// If returning to same place as started from animation and on same axis
time = calculateRealTime(animatingRect, prevFromRect, prevToRect, this.options);
}
}
// if fromRect != toRect: animate
if (!isRectEqual(toRect, fromRect)) {
target.prevFromRect = fromRect;
target.prevToRect = toRect;
if (!time) {
time = this.options.animation;
}
this.animate(
target,
animatingRect,
toRect,
time
);
}
if (time) {
animating = true;
animationTime = Math.max(animationTime, time);
clearTimeout(target.animationResetTimer);
target.animationResetTimer = setTimeout(function() {
target.animationTime = 0;
target.prevFromRect = null;
target.fromRect = null;
target.prevToRect = null;
target.thisAnimationDuration = null;
}, time);
target.thisAnimationDuration = time;
}
});
clearTimeout(animationCallbackId);
if (!animating) {
if (typeof(callback) === 'function') callback();
} else {
animationCallbackId = setTimeout(function() {
if (typeof(callback) === 'function') callback();
}, animationTime);
}
animationStates = [];
},
animate(target, currentRect, toRect, duration) {
if (duration) {
css(target, 'transition', '');
css(target, 'transform', '');
let elMatrix = matrix(this.el),
scaleX = elMatrix && elMatrix.a,
scaleY = elMatrix && elMatrix.d,
translateX = (currentRect.left - toRect.left) / (scaleX || 1),
translateY = (currentRect.top - toRect.top) / (scaleY || 1);
target.animatingX = !!translateX;
target.animatingY = !!translateY;
css(target, 'transform', 'translate3d(' + translateX + 'px,' + translateY + 'px,0)');
this.forRepaintDummy = repaint(target); // repaint
css(target, 'transition', 'transform ' + duration + 'ms' + (this.options.easing ? ' ' + this.options.easing : ''));
css(target, 'transform', 'translate3d(0,0,0)');
(typeof target.animated === 'number') && clearTimeout(target.animated);
target.animated = setTimeout(function () {
css(target, 'transition', '');
css(target, 'transform', '');
target.animated = false;
target.animatingX = false;
target.animatingY = false;
}, duration);
}
}
};
}
function repaint(target) {
return target.offsetWidth;
}
function calculateRealTime(animatingRect, fromRect, toRect, options) {
return (
Math.sqrt(Math.pow(fromRect.top - animatingRect.top, 2) + Math.pow(fromRect.left - animatingRect.left, 2)) /
Math.sqrt(Math.pow(fromRect.top - toRect.top, 2) + Math.pow(fromRect.left - toRect.left, 2))
) * options.animation;
}
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