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