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76 lines
2.8 KiB
76 lines
2.8 KiB
// The MIT License (MIT)
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//
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// Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import UIKit
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class MatchPreprocessor: BasePreprocessor {
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override func process(fromViews: [UIView], toViews: [UIView]) {
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for tv in toViews {
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guard let id = tv.hero.id, let fv = context.sourceView(for: id) else { continue }
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var tvState = context[tv] ?? HeroTargetState()
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var fvState = context[fv] ?? HeroTargetState()
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// match is just a two-way source effect
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tvState.source = id
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fvState.source = id
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fvState.arc = tvState.arc
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fvState.duration = tvState.duration
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fvState.timingFunction = tvState.timingFunction
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fvState.delay = tvState.delay
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fvState.spring = tvState.spring
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let forceNonFade = tvState.nonFade || fvState.nonFade
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let isNonOpaque = !fv.isOpaque || fv.alpha < 1 || !tv.isOpaque || tv.alpha < 1
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if context.insertToViewFirst {
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fvState.opacity = 0
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if !forceNonFade && isNonOpaque {
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tvState.opacity = 0
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} else {
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tvState.opacity = nil
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if !tv.layer.masksToBounds && tvState.displayShadow {
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fvState.displayShadow = false
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}
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}
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} else {
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tvState.opacity = 0
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if !forceNonFade && isNonOpaque {
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// cross fade if from/toViews are not opaque
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fvState.opacity = 0
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} else {
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// no cross fade in this case, fromView is always displayed during the transition.
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fvState.opacity = nil
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// we dont want two shadows showing up. Therefore we disable toView's shadow when fromView is able to display its shadow
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if !fv.layer.masksToBounds && fvState.displayShadow {
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tvState.displayShadow = false
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}
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}
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}
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context[tv] = tvState
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context[fv] = fvState
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}
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}
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}
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