/**
* @license
* Copyright 2016 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
const Aggregate = require('../aggregate');
const manifestExists = require('../../audits/manifest/exists');
const manifestName = require('../../audits/manifest/name');
const manifestBackgroundColor = require('../../audits/manifest/background-color');
const manifestThemeColor = require('../../audits/manifest/theme-color');
const manifestIconsMin192 = require('../../audits/manifest/icons-min-192');
class SplashScreen extends Aggregate {
/**
* @override
* @return {string}
*/
static get name() {
return 'Installed web app will launch with custom splash screen';
}
/**
* @override
* @return {string}
*/
static get description() {
return `A default splash screen will be constructed, but meeting these requirements guarantee a
high-quality and customizable <a href="https://developers.google.com/web/updates/2015/10/splashscreen?hl=en">splash screen</a>
the user sees between tapping the home screen icon and your app’s first paint.`;
}
/**
* @override
* @return {!AggregationType}
*/
static get type() {
return Aggregate.TYPES.PWA;
}
/**
* An app that was installed to homescreen can get a custom splash screen
* while launching.
* Chrome needs the following:
* - has valid manifest
* - manifest has valid name
* - manifest has valid background_color
* - manifest has valid theme_color
* - icon of size >= 192x192 (technically minimum is 48dp and ideal/non-scaled is 128dp)
* - while optional, icons at 256, 384 and 512 will be used when appropriate
* @see https://github.com/GoogleChrome/lighthouse/issues/24
*
* @override
* @return {!AggregationCriteria}
*/
static get criteria() {
const criteria = {};
criteria[manifestExists.meta.name] = {
value: true,
weight: 1
};
criteria[manifestName.meta.name] = {
value: true,
weight: 0
};
criteria[manifestBackgroundColor.meta.name] = {
value: true,
weight: 1
};
criteria[manifestThemeColor.meta.name] = {
value: true,
weight: 0
};
criteria[manifestIconsMin192.meta.name] = {
value: true,
weight: 1
};
return criteria;
}
}
module.exports = SplashScreen;
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