paper-spinner-styles.html
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<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<dom-module id="paper-spinner-styles">
<template>
<style>
/*
/**************************/
/* STYLES FOR THE SPINNER */
/**************************/
/*
* Constants:
* STROKEWIDTH = 3px
* ARCSIZE = 270 degrees (amount of circle the arc takes up)
* ARCTIME = 1333ms (time it takes to expand and contract arc)
* ARCSTARTROT = 216 degrees (how much the start location of the arc
* should rotate each time, 216 gives us a
* 5 pointed star shape (it's 360/5 * 3).
* For a 7 pointed star, we might do
* 360/7 * 3 = 154.286)
* CONTAINERWIDTH = 28px
* SHRINK_TIME = 400ms
*/
:host {
display: inline-block;
position: relative;
width: 28px; /* CONTAINERWIDTH */
height: 28px; /* CONTAINERWIDTH */
}
#spinnerContainer {
width: 100%;
height: 100%;
/* The spinner does not have any contents that would have to be
* flipped if the direction changes. Always use ltr so that the
* style works out correctly in both cases. */
direction: ltr;
}
#spinnerContainer.active {
/* duration: 360 * ARCTIME / (ARCSTARTROT + (360-ARCSIZE)) */
-webkit-animation: container-rotate 1568ms linear infinite;
animation: container-rotate 1568ms linear infinite;
}
@-webkit-keyframes container-rotate {
to { -webkit-transform: rotate(360deg) }
}
@keyframes container-rotate {
to { transform: rotate(360deg) }
}
.spinner-layer {
position: absolute;
width: 100%;
height: 100%;
opacity: 0;
white-space: nowrap;
border-color: var(--paper-spinner-color, --google-blue-500);
}
.layer-1 {
border-color: var(--paper-spinner-layer-1-color, --google-blue-500);
}
.layer-2 {
border-color: var(--paper-spinner-layer-2-color, --google-red-500);
}
.layer-3 {
border-color: var(--paper-spinner-layer-3-color, --google-yellow-500);
}
.layer-4 {
border-color: var(--paper-spinner-layer-4-color, --google-green-500);
}
/**
* IMPORTANT NOTE ABOUT CSS ANIMATION PROPERTIES (keanulee):
*
* iOS Safari (tested on iOS 8.1) does not handle animation-delay very well - it doesn't
* guarantee that the animation will start _exactly_ after that value. So we avoid using
* animation-delay and instead set custom keyframes for each color (as layer-2undant as it
* seems).
*
* We write out each animation in full (instead of separating animation-name,
* animation-duration, etc.) because under the polyfill, Safari does not recognize those
* specific properties properly, treats them as -webkit-animation, and overrides the
* other animation rules. See https://github.com/Polymer/platform/issues/53.
*/
.active .spinner-layer {
/* durations: 4 * ARCTIME */
-webkit-animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
opacity: 1;
}
.active .spinner-layer.layer-1 {
/* durations: 4 * ARCTIME */
-webkit-animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-1-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-1-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
}
.active .spinner-layer.layer-2 {
/* durations: 4 * ARCTIME */
-webkit-animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-2-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-2-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
}
.active .spinner-layer.layer-3 {
/* durations: 4 * ARCTIME */
-webkit-animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-3-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-3-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
}
.active .spinner-layer.layer-4 {
/* durations: 4 * ARCTIME */
-webkit-animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-4-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: fill-unfill-rotate 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both, layer-4-fade-in-out 5332ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
}
@-webkit-keyframes fill-unfill-rotate {
12.5% { -webkit-transform: rotate(135deg); } /* 0.5 * ARCSIZE */
25% { -webkit-transform: rotate(270deg); } /* 1 * ARCSIZE */
37.5% { -webkit-transform: rotate(405deg); } /* 1.5 * ARCSIZE */
50% { -webkit-transform: rotate(540deg); } /* 2 * ARCSIZE */
62.5% { -webkit-transform: rotate(675deg); } /* 2.5 * ARCSIZE */
75% { -webkit-transform: rotate(810deg); } /* 3 * ARCSIZE */
87.5% { -webkit-transform: rotate(945deg); } /* 3.5 * ARCSIZE */
to { -webkit-transform: rotate(1080deg); } /* 4 * ARCSIZE */
}
@keyframes fill-unfill-rotate {
12.5% { transform: rotate(135deg); } /* 0.5 * ARCSIZE */
25% { transform: rotate(270deg); } /* 1 * ARCSIZE */
37.5% { transform: rotate(405deg); } /* 1.5 * ARCSIZE */
50% { transform: rotate(540deg); } /* 2 * ARCSIZE */
62.5% { transform: rotate(675deg); } /* 2.5 * ARCSIZE */
75% { transform: rotate(810deg); } /* 3 * ARCSIZE */
87.5% { transform: rotate(945deg); } /* 3.5 * ARCSIZE */
to { transform: rotate(1080deg); } /* 4 * ARCSIZE */
}
/**
* HACK: Even though the intention is to have the current .spinner-layer at
* `opacity: 1`, we set it to `opacity: 0.99` instead since this forces Chrome
* to do proper subpixel rendering for the elements being animated. This is
* especially visible in Chrome 39 on Ubuntu 14.04. See:
*
* - https://github.com/Polymer/paper-spinner/issues/9
* - https://code.google.com/p/chromium/issues/detail?id=436255
*/
@-webkit-keyframes layer-1-fade-in-out {
from { opacity: 0.99; }
25% { opacity: 0.99; }
26% { opacity: 0; }
89% { opacity: 0; }
90% { opacity: 0.99; }
100% { opacity: 0.99; }
}
@keyframes layer-1-fade-in-out {
from { opacity: 0.99; }
25% { opacity: 0.99; }
26% { opacity: 0; }
89% { opacity: 0; }
90% { opacity: 0.99; }
100% { opacity: 0.99; }
}
@-webkit-keyframes layer-2-fade-in-out {
from { opacity: 0; }
15% { opacity: 0; }
25% { opacity: 0.99; }
50% { opacity: 0.99; }
51% { opacity: 0; }
}
@keyframes layer-2-fade-in-out {
from { opacity: 0; }
15% { opacity: 0; }
25% { opacity: 0.99; }
50% { opacity: 0.99; }
51% { opacity: 0; }
}
@-webkit-keyframes layer-3-fade-in-out {
from { opacity: 0; }
40% { opacity: 0; }
50% { opacity: 0.99; }
75% { opacity: 0.99; }
76% { opacity: 0; }
}
@keyframes layer-3-fade-in-out {
from { opacity: 0; }
40% { opacity: 0; }
50% { opacity: 0.99; }
75% { opacity: 0.99; }
76% { opacity: 0; }
}
@-webkit-keyframes layer-4-fade-in-out {
from { opacity: 0; }
65% { opacity: 0; }
75% { opacity: 0.99; }
90% { opacity: 0.99; }
100% { opacity: 0; }
}
@keyframes layer-4-fade-in-out {
from { opacity: 0; }
65% { opacity: 0; }
75% { opacity: 0.99; }
90% { opacity: 0.99; }
100% { opacity: 0; }
}
/**
* Patch the gap that appear between the two adjacent div.circle-clipper while the
* spinner is rotating (appears on Chrome 38, Safari 7.1, and IE 11).
*
* Update: the gap no longer appears on Chrome when .spinner-layer's opacity is 0.99,
* but still does on Safari and IE.
*/
.gap-patch {
position: absolute;
box-sizing: border-box;
top: 0;
left: 45%;
width: 10%;
height: 100%;
overflow: hidden;
border-color: inherit;
}
.gap-patch .circle {
width: 1000%;
left: -450%;
}
.circle-clipper {
display: inline-block;
position: relative;
width: 50%;
height: 100%;
overflow: hidden;
border-color: inherit;
}
.circle-clipper .circle {
width: 200%;
}
.circle {
box-sizing: border-box;
height: 100%;
border-width: 3px; /* STROKEWIDTH */
border-style: solid;
border-color: inherit;
border-bottom-color: transparent !important;
border-radius: 50%;
-webkit-animation: none;
animation: none;
@apply(--layout-fit);
}
.circle-clipper.left .circle {
border-right-color: transparent !important;
-webkit-transform: rotate(129deg);
transform: rotate(129deg);
}
.circle-clipper.right .circle {
left: -100%;
border-left-color: transparent !important;
-webkit-transform: rotate(-129deg);
transform: rotate(-129deg);
}
.active .circle-clipper.left .circle {
/* duration: ARCTIME */
-webkit-animation: left-spin 1333ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: left-spin 1333ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
}
.active .circle-clipper.right .circle {
/* duration: ARCTIME */
-webkit-animation: right-spin 1333ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
animation: right-spin 1333ms cubic-bezier(0.4, 0.0, 0.2, 1) infinite both;
}
@-webkit-keyframes left-spin {
from { -webkit-transform: rotate(130deg); }
50% { -webkit-transform: rotate(-5deg); }
to { -webkit-transform: rotate(130deg); }
}
@keyframes left-spin {
from { transform: rotate(130deg); }
50% { transform: rotate(-5deg); }
to { transform: rotate(130deg); }
}
@-webkit-keyframes right-spin {
from { -webkit-transform: rotate(-130deg); }
50% { -webkit-transform: rotate(5deg); }
to { -webkit-transform: rotate(-130deg); }
}
@keyframes right-spin {
from { transform: rotate(-130deg); }
50% { transform: rotate(5deg); }
to { transform: rotate(-130deg); }
}
#spinnerContainer.cooldown {
/* duration: SHRINK_TIME */
-webkit-animation: container-rotate 1568ms linear infinite, fade-out 400ms cubic-bezier(0.4, 0.0, 0.2, 1);
animation: container-rotate 1568ms linear infinite, fade-out 400ms cubic-bezier(0.4, 0.0, 0.2, 1);
}
@-webkit-keyframes fade-out {
from { opacity: 0.99; }
to { opacity: 0; }
}
@keyframes fade-out {
from { opacity: 0.99; }
to { opacity: 0; }
}
</style>
</template>
</dom-module>