1 2(function() { 3 4 var webkitStyles = '-webkit-transition' in document.documentElement.style 5 var TRANSITION_CSSNAME = webkitStyles ? '-webkit-transition' : 'transition'; 6 var TRANSFORM_CSSNAME = webkitStyles ? '-webkit-transform' : 'transform'; 7 var TRANSITION_NAME = webkitStyles ? 'webkitTransition' : 'transition'; 8 var TRANSFORM_NAME = webkitStyles ? 'webkitTransform' : 'transform'; 9 10 var hasShadowDOMPolyfill = window.ShadowDOMPolyfill; 11 12 Polymer('hero-transition',{ 13 14 go: function(scope, options) { 15 var props = [ 16 'border-radius', 17 'width', 18 'height', 19 TRANSFORM_CSSNAME 20 ]; 21 22 var duration = options && options.duration || 23 (CoreStyle.g.transitions.heroDuration || 24 CoreStyle.g.transitions.duration); 25 26 scope._heroes.forEach(function(h) { 27 var d = h.h0.hasAttribute('hero-delayed') ? CoreStyle.g.transitions.heroDelay : ''; 28 var wt = []; 29 props.forEach(function(p) { 30 wt.push(p + ' ' + duration + ' ' + options.easing + ' ' + d); 31 }); 32 33 h.h1.style[TRANSITION_NAME] = wt.join(', '); 34 h.h1.style.borderRadius = h.r1; 35 h.h1.style[TRANSFORM_NAME] = 'none'; 36 }); 37 38 this.super(arguments); 39 40 if (!scope._heroes.length) { 41 this.completed = true; 42 } 43 }, 44 45 prepare: function(scope, options) { 46 this.super(arguments); 47 var src = options.src, dst = options.dst; 48 49 if (scope._heroes && scope._heroes.length) { 50 this.ensureComplete(scope); 51 } else { 52 scope._heroes = []; 53 } 54 55 // FIXME(yvonne): basic support for nested pages. 56 // Look for heroes in the light DOM and one level of shadow DOM of the src and dst, 57 // and also in src.selectedItem or dst.selectedItem, then transform the dst hero to src 58 var ss = '[hero]'; 59 var h$ = this.findAllInShadows(src, ss); 60 if (src.selectedItem) { 61 hs$ = this.findAllInShadows(src.selectedItem, ss); 62 hsa$ = []; 63 // De-duplicate items 64 Array.prototype.forEach.call(hs$, function(hs) { 65 if (h$.indexOf(hs) === -1) { 66 hsa$.push(hs); 67 } 68 }) 69 h$ = h$.concat(hsa$); 70 } 71 72 for (var i=0, h0; h0=h$[i]; i++) { 73 var v = h0.getAttribute('hero-id'); 74 var ds = '[hero][hero-id="' + v + '"]'; 75 var h1 = this.findInShadows(dst, ds); 76 77 if (!h1 && dst.selectedItem) { 78 h1 = this.findInShadows(dst.selectedItem, ds); 79 } 80 81 // console.log('src', src); 82 // console.log('dst', dst, dst.selectedItem); 83 // console.log(v, h0, h1); 84 if (v && h1) { 85 var c0 = getComputedStyle(h0); 86 var c1 = getComputedStyle(h1); 87 var h = { 88 h0: h0, 89 b0: h0.getBoundingClientRect(), 90 r0: c0.borderRadius, 91 h1: h1, 92 b1: h1.getBoundingClientRect(), 93 r1: c1.borderRadius 94 }; 95 96 var dl = h.b0.left - h.b1.left; 97 var dt = h.b0.top - h.b1.top; 98 var sw = h.b0.width / h.b1.width; 99 var sh = h.b0.height / h.b1.height; 100 101 // h.scaley = h.h0.hasAttribute('scaley'); 102 // if (!h.scaley && (sw !== 1 || sh !== 1)) { 103 // sw = sh = 1; 104 // h.h1.style.width = h.b0.width + 'px'; 105 // h.h1.style.height = h.b0.height + 'px'; 106 // } 107 108 // Also animate the border-radius for the circle-to-square transition 109 if (h.r0 !== h.r1) { 110 h.h1.style.borderRadius = h.r0; 111 } 112 113 // console.log(h); 114 115 h.h1.style[TRANSFORM_NAME] = 'translate(' + dl + 'px,' + dt + 'px)' + ' scale(' + sw + ',' + sh + ')'; 116 h.h1.style[TRANSFORM_NAME + 'Origin'] = '0 0'; 117 118 scope._heroes.push(h); 119 } 120 } 121 122 }, 123 124 // carefully look into ::shadow with polyfill specific hack 125 findInShadows: function(node, selector) { 126 return node.querySelector(selector) || (hasShadowDOMPolyfill ? 127 Platform.queryAllShadows(node, selector) : 128 node.querySelector('::shadow ' + selector)); 129 }, 130 131 findAllInShadows: function(node, selector) { 132 if (hasShadowDOMPolyfill) { 133 var nodes = node.querySelectorAll(selector).array(); 134 var shadowNodes = Platform.queryAllShadows(node, selector, true); 135 return nodes.concat(shadowNodes); 136 } else { 137 return node.querySelectorAll(selector).array().concat(node.shadowRoot ? node.shadowRoot.querySelectorAll(selector).array() : []); 138 } 139 }, 140 141 ensureComplete: function(scope) { 142 this.super(arguments); 143 if (scope._heroes) { 144 scope._heroes.forEach(function(h) { 145 h.h1.style[TRANSITION_NAME] = null; 146 h.h1.style[TRANSFORM_NAME] = null; 147 }); 148 scope._heroes = []; 149 } 150 }, 151 152 complete: function(scope, e) { 153 // if (e.propertyName === TRANSFORM_CSSNAME) { 154 var done = false; 155 scope._heroes.forEach(function(h) { 156 if (h.h1 === e.path[0]) { 157 done = true; 158 } 159 }); 160 161 if (done) { 162 this.super(arguments); 163 } 164 // } 165 } 166 167 }); 168 169})(); 170