/
amp-context.js
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/
amp-context.js
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/**
* Copyright 2019 The AMP HTML Authors. 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.
*/
const {
useContext,
} = preactHooks;
/**
* - renderable: whether this vDOM area is renderable. Analogous to
* `display-locking` CSS.
* - playable: whether the playback is allowed in this vDOM area. If playback
* is not allow, the component must immediately stop the playback.
*/
export const AmpContext = preact.createContext({
renderable: true,
playable: true,
});
/**
* A wrapper-component that recalculates and propagates AmpContext properties.
*/
export function withAmpContext(props) {
const parent = useContext(AmpContext);
const current = {
renderable: parent.renderable && props.renderable,
playable: parent.playable && props.playable,
};
return preact.createElement(
AmpContext.Provider,
{
...props,
value: current,
}
);
}