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// ==========================================================================
// Style utils
// ==========================================================================
import is from './is';
export function validateRatio(input) {
if (!is.array(input) && (!is.string(input) || !input.includes(':'))) {
return false;
}
const ratio = is.array(input) ? input : input.split(':');
return ratio.map(Number).every(is.number);
}
export function reduceAspectRatio(ratio) {
if (!is.array(ratio) || !ratio.every(is.number)) {
return null;
}
const [width, height] = ratio;
const getDivider = (w, h) => (h === 0 ? w : getDivider(h, w % h));
const divider = getDivider(width, height);
return [width / divider, height / divider];
}
export function getAspectRatio(input) {
const parse = ratio => (validateRatio(ratio) ? ratio.split(':').map(Number) : null);
// Try provided ratio
let ratio = parse(input);
// Get from config
if (ratio === null) {
ratio = parse(this.config.ratio);
}
// Get from embed
if (ratio === null && !is.empty(this.embed) && is.array(this.embed.ratio)) {
({ ratio } = this.embed);
}
// Get from HTML5 video
if (ratio === null && this.isHTML5) {
const { videoWidth, videoHeight } = this.media;
ratio = reduceAspectRatio([videoWidth, videoHeight]);
}
return ratio;
}
// Set aspect ratio for responsive container
export function setAspectRatio(input) {
if (!this.isVideo) {
return {};
}
const { wrapper } = this.elements;
const ratio = getAspectRatio.call(this, input);
const [w, h] = is.array(ratio) ? ratio : [0, 0];
const padding = (100 / w) * h;
wrapper.style.paddingBottom = `${padding}%`;
// For Vimeo we have an extra <div> to hide the standard controls and UI
if (this.isVimeo && this.supported.ui) {
const height = 240;
const offset = (height - padding) / (height / 50);
this.media.style.transform = `translateY(-${offset}%)`;
} else if (this.isHTML5) {
wrapper.classList.toggle(this.config.classNames.videoFixedRatio, ratio !== null);
}
return { padding, ratio };
}
export default { setAspectRatio };
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