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-
- (function() {
-
- var webkitStyles = '-webkit-transition' in document.documentElement.style
- var TRANSITION_CSSNAME = webkitStyles ? '-webkit-transition' : 'transition';
- var TRANSFORM_CSSNAME = webkitStyles ? '-webkit-transform' : 'transform';
- var TRANSITION_NAME = webkitStyles ? 'webkitTransition' : 'transition';
- var TRANSFORM_NAME = webkitStyles ? 'webkitTransform' : 'transform';
-
- var hasShadowDOMPolyfill = window.ShadowDOMPolyfill;
-
- Polymer('hero-transition',{
-
- go: function(scope, options) {
- var props = [
- 'border-radius',
- 'width',
- 'height',
- TRANSFORM_CSSNAME
- ];
-
- var duration = options && options.duration ||
- (CoreStyle.g.transitions.heroDuration ||
- CoreStyle.g.transitions.duration);
-
- scope._heroes.forEach(function(h) {
- var d = h.h0.hasAttribute('hero-delayed') ? CoreStyle.g.transitions.heroDelay : '';
- var wt = [];
- props.forEach(function(p) {
- wt.push(p + ' ' + duration + ' ' + options.easing + ' ' + d);
- });
-
- h.h1.style[TRANSITION_NAME] = wt.join(', ');
- h.h1.style.borderRadius = h.r1;
- h.h1.style[TRANSFORM_NAME] = '';
- });
-
- this.super(arguments);
-
- if (!scope._heroes.length) {
- this.completed = true;
- }
- },
-
- prepare: function(scope, options) {
- this.super(arguments);
- var src = options.src, dst = options.dst;
-
- if (scope._heroes && scope._heroes.length) {
- this.ensureComplete(scope);
- } else {
- scope._heroes = [];
- }
-
- // FIXME(yvonne): basic support for nested pages.
- // Look for heroes in the light DOM and one level of shadow DOM of the src and dst,
- // and also in src.selectedItem or dst.selectedItem, then transform the dst hero to src
- var ss = '[hero]';
- var h$ = this.findAllInShadows(src, ss);
- if (src.selectedItem) {
- hs$ = this.findAllInShadows(src.selectedItem, ss);
- hsa$ = [];
- // De-duplicate items
- Array.prototype.forEach.call(hs$, function(hs) {
- if (h$.indexOf(hs) === -1) {
- hsa$.push(hs);
- }
- })
- h$ = h$.concat(hsa$);
- }
-
- for (var i=0, h0; h0=h$[i]; i++) {
- var v = h0.getAttribute('hero-id');
- var ds = '[hero][hero-id="' + v + '"]';
- var h1 = this.findInShadows(dst, ds);
-
- if (!h1 && dst.selectedItem) {
- h1 = this.findInShadows(dst.selectedItem, ds);
- }
-
- // console.log('src', src);
- // console.log('dst', dst, dst.selectedItem);
- // console.log(v, h0, h1);
- if (v && h1) {
- var c0 = getComputedStyle(h0);
- var c1 = getComputedStyle(h1);
- var h = {
- h0: h0,
- b0: h0.getBoundingClientRect(),
- r0: c0.borderRadius,
- h1: h1,
- b1: h1.getBoundingClientRect(),
- r1: c1.borderRadius
- };
-
- var dl = h.b0.left - h.b1.left;
- var dt = h.b0.top - h.b1.top;
- var sw = h.b0.width / h.b1.width;
- var sh = h.b0.height / h.b1.height;
-
- // h.scaley = h.h0.hasAttribute('scaley');
- // if (!h.scaley && (sw !== 1 || sh !== 1)) {
- // sw = sh = 1;
- // h.h1.style.width = h.b0.width + 'px';
- // h.h1.style.height = h.b0.height + 'px';
- // }
-
- // Also animate the border-radius for the circle-to-square transition
- if (h.r0 !== h.r1) {
- h.h1.style.borderRadius = h.r0;
- }
-
- // console.log(h);
-
- h.h1.style[TRANSFORM_NAME] = 'translate(' + dl + 'px,' + dt + 'px)' + ' scale(' + sw + ',' + sh + ')';
- h.h1.style[TRANSFORM_NAME + 'Origin'] = '0 0';
-
- scope._heroes.push(h);
- }
- }
-
- },
-
- // carefully look into ::shadow with polyfill specific hack
- findInShadows: function(node, selector) {
- return node.querySelector(selector) || (hasShadowDOMPolyfill ?
- queryAllShadows(node, selector) :
- node.querySelector('::shadow ' + selector));
- },
-
- findAllInShadows: function(node, selector) {
- if (hasShadowDOMPolyfill) {
- var nodes = node.querySelectorAll(selector).array();
- var shadowNodes = queryAllShadows(node, selector, true);
- return nodes.concat(shadowNodes);
- } else {
- return node.querySelectorAll(selector).array().concat(node.shadowRoot ? node.shadowRoot.querySelectorAll(selector).array() : []);
- }
- },
-
- ensureComplete: function(scope) {
- this.super(arguments);
- if (scope._heroes) {
- scope._heroes.forEach(function(h) {
- h.h1.style[TRANSITION_NAME] = '';
- h.h1.style[TRANSFORM_NAME] = '';
- });
- scope._heroes = [];
- }
- },
-
- complete: function(scope, e) {
- // if (e.propertyName === TRANSFORM_CSSNAME) {
- var done = false;
- scope._heroes.forEach(function(h) {
- if (h.h1 === e.path[0]) {
- done = true;
- }
- });
-
- if (done) {
- this.super(arguments);
- }
- // }
- }
-
- });
-
-
- // utility method for searching through shadowRoots.
- function queryShadow(node, selector) {
- var m, el = node.firstElementChild;
- var shadows, sr, i;
- shadows = [];
- sr = node.shadowRoot;
- while(sr) {
- shadows.push(sr);
- sr = sr.olderShadowRoot;
- }
- for(i = shadows.length - 1; i >= 0; i--) {
- m = shadows[i].querySelector(selector);
- if (m) {
- return m;
- }
- }
- while(el) {
- m = queryShadow(el, selector);
- if (m) {
- return m;
- }
- el = el.nextElementSibling;
- }
- return null;
- }
-
- function _queryAllShadows(node, selector, results) {
- var el = node.firstElementChild;
- var temp, sr, shadows, i, j;
- shadows = [];
- sr = node.shadowRoot;
- while(sr) {
- shadows.push(sr);
- sr = sr.olderShadowRoot;
- }
- for (i = shadows.length - 1; i >= 0; i--) {
- temp = shadows[i].querySelectorAll(selector);
- for(j = 0; j < temp.length; j++) {
- results.push(temp[j]);
- }
- }
- while (el) {
- _queryAllShadows(el, selector, results);
- el = el.nextElementSibling;
- }
- return results;
- }
-
- queryAllShadows = function(node, selector, all) {
- if (all) {
- return _queryAllShadows(node, selector, []);
- } else {
- return queryShadow(node, selector);
- }
- };
-
- })();
-