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| 1 | |
| 2 (function() { | |
| 3 | |
| 4 Polymer({ | |
| 5 | |
| 6 is: 'neon-animated-pages', | |
| 7 | |
| 8 behaviors: [ | |
| 9 Polymer.IronResizableBehavior, | |
| 10 Polymer.IronSelectableBehavior, | |
| 11 Polymer.NeonAnimationRunnerBehavior | |
| 12 ], | |
| 13 | |
| 14 properties: { | |
| 15 | |
| 16 activateEvent: { | |
| 17 type: String, | |
| 18 value: '' | |
| 19 }, | |
| 20 | |
| 21 // if true, the initial page selection will also be animated according to
its animation config. | |
| 22 animateInitialSelection: { | |
| 23 type: Boolean, | |
| 24 value: false | |
| 25 } | |
| 26 | |
| 27 }, | |
| 28 | |
| 29 observers: [ | |
| 30 '_selectedChanged(selected)' | |
| 31 ], | |
| 32 | |
| 33 listeners: { | |
| 34 'neon-animation-finish': '_onNeonAnimationFinish' | |
| 35 }, | |
| 36 | |
| 37 _selectedChanged: function(selected) { | |
| 38 | |
| 39 var selectedPage = this.selectedItem; | |
| 40 var oldPage = this._prevSelected || false; | |
| 41 this._prevSelected = selectedPage; | |
| 42 | |
| 43 // on initial load and if animateInitialSelection is negated, simply displ
ay selectedPage. | |
| 44 if (!oldPage && !this.animateInitialSelection) { | |
| 45 this._completeSelectedChanged(); | |
| 46 return; | |
| 47 } | |
| 48 | |
| 49 // insert safari fix. | |
| 50 this.animationConfig = [{ | |
| 51 name: 'opaque-animation', | |
| 52 node: selectedPage | |
| 53 }]; | |
| 54 | |
| 55 // configure selectedPage animations. | |
| 56 if (this.entryAnimation) { | |
| 57 this.animationConfig.push({ | |
| 58 name: this.entryAnimation, | |
| 59 node: selectedPage | |
| 60 }); | |
| 61 } else { | |
| 62 if (selectedPage.getAnimationConfig) { | |
| 63 this.animationConfig.push({ | |
| 64 animatable: selectedPage, | |
| 65 type: 'entry' | |
| 66 }); | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 // configure oldPage animations iff exists. | |
| 71 if (oldPage) { | |
| 72 | |
| 73 // cancel the currently running animation if one is ongoing. | |
| 74 if (oldPage.classList.contains('neon-animating')) { | |
| 75 this._squelchNextFinishEvent = true; | |
| 76 this.cancelAnimation(); | |
| 77 this._completeSelectedChanged(); | |
| 78 } | |
| 79 | |
| 80 // configure the animation. | |
| 81 if (this.exitAnimation) { | |
| 82 this.animationConfig.push({ | |
| 83 name: this.exitAnimation, | |
| 84 node: oldPage | |
| 85 }); | |
| 86 } else { | |
| 87 if (oldPage.getAnimationConfig) { | |
| 88 this.animationConfig.push({ | |
| 89 animatable: oldPage, | |
| 90 type: 'exit' | |
| 91 }); | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 // display the oldPage during the transition. | |
| 96 oldPage.classList.add('neon-animating'); | |
| 97 } | |
| 98 | |
| 99 // display the selectedPage during the transition. | |
| 100 selectedPage.classList.add('neon-animating'); | |
| 101 | |
| 102 // actually run the animations. | |
| 103 if (this.animationConfig.length > 1) { | |
| 104 | |
| 105 // on first load, ensure we run animations only after element is attache
d. | |
| 106 if (!this.isAttached) { | |
| 107 this.async(function () { | |
| 108 this.playAnimation(null, { | |
| 109 fromPage: null, | |
| 110 toPage: selectedPage | |
| 111 }); | |
| 112 }); | |
| 113 | |
| 114 } else { | |
| 115 this.playAnimation(null, { | |
| 116 fromPage: oldPage, | |
| 117 toPage: selectedPage | |
| 118 }); | |
| 119 } | |
| 120 | |
| 121 } else { | |
| 122 this._completeSelectedChanged(oldPage, selectedPage); | |
| 123 } | |
| 124 }, | |
| 125 | |
| 126 _completeSelectedChanged: function(oldPage, selectedPage) { | |
| 127 if (selectedPage) { | |
| 128 selectedPage.classList.remove('neon-animating'); | |
| 129 } | |
| 130 if (oldPage) { | |
| 131 oldPage.classList.remove('neon-animating'); | |
| 132 } | |
| 133 if (!selectedPage || !oldPage) { | |
| 134 var nodes = Polymer.dom(this.$.content).getDistributedNodes(); | |
| 135 for (var node, index = 0; node = nodes[index]; index++) { | |
| 136 node.classList && node.classList.remove('neon-animating'); | |
| 137 } | |
| 138 } | |
| 139 this.async(this.notifyResize); | |
| 140 }, | |
| 141 | |
| 142 _onNeonAnimationFinish: function(event) { | |
| 143 if (this._squelchNextFinishEvent) { | |
| 144 this._squelchNextFinishEvent = false; | |
| 145 return; | |
| 146 } | |
| 147 this._completeSelectedChanged(event.detail.fromPage, event.detail.toPage); | |
| 148 } | |
| 149 | |
| 150 }) | |
| 151 | |
| 152 })(); | |
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