File size: 2,235 Bytes
2fcec7b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | import isNode from 'detect-node';
import getDimensions from '../get-dimensions';
// TODO: There should be a way to define the default viewport size when rendering
// from server-side or any other env.
/**
* Create a handler for responsive functionalities.
* @param {Object} depencencies - Depencencies.
* @param {Function} depencencies.getTheme - Inject the theme settings.
* @param {Function} depencencies.getDimensions - Inject the get dimensions tool.
* @return {Object} - Handler.
*/
export default depencencies => {
const deps = {
getTheme: () => ({}),
getDimensions,
...depencencies
};
return {
/**
* Get the current responsive stats.
* @return {Object} { small: Boolean, medium: Boolean, large: Boolean }
*/
get () {
const theme = deps.getTheme();
const { width } = deps.getDimensions();
const { small, medium, large } = theme.responsive;
if (width <= small) {
return { small: true, status: 'small' };
}
else if (width <= medium) {
return { medium: true, status: 'medium' };
}
else if (width <= large) {
return { large: true, status: 'large' };
}
return { xlarge: true, status: 'xlarge' };
},
/**
* Register a on resize window callback to know when the current browser viewport
* dimentions make the breakpoint change.
* @param {Function} callback - It's called on every change on the breakpoint
* and receives and object defining the current viewport size.
* @return {Function} The event listener.
*/
on (callback) {
const current = this.get();
let state = current.status;
const onChange = () => {
const stats = this.get();
if (stats.status !== state) {
callback(stats);
state = stats.status;
}
};
if (!isNode) {
window.addEventListener('resize', onChange, false);
}
return onChange;
},
/**
* Turns off a window on resize callback previously created.
* @param {Function} - The event callback.
*/
off (onChange) {
if (!isNode) {
window.removeEventListener('resize', onChange, false);
}
}
};
};
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