gristlabs_grist-core/app/client/ui/UserImage.ts

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import {colors, theme} from 'app/client/ui2018/cssVars';
import {FullUser} from 'app/common/LoginSessionAPI';
import {dom, DomElementArg, styled} from 'grainjs';
export type Size = 'small' | 'medium' | 'large';
/**
* Returns a DOM element showing a circular icon with a user's picture, or the user's initials if
* picture is missing. Also varies the color of the circle when using initials.
*/
export function createUserImage(user: FullUser|null, size: Size, ...args: DomElementArg[]): HTMLElement {
let initials: string;
return cssUserImage(
cssUserImage.cls('-' + size),
(!user || user.anonymous) ? cssUserImage.cls('-anon') :
[
(user.picture ? cssUserPicture({src: user.picture}, dom.on('error', (ev, el) => dom.hideElem(el, true))) : null),
dom.style('background-color', pickColor(user)),
(initials = getInitials(user)).length > 1 ? cssUserImage.cls('-reduced') : null,
initials!,
],
...args,
);
}
/**
* Extracts initials from a user, e.g. a FullUser. E.g. "Foo Bar" is turned into "FB", and
* "foo@example.com" into just "f".
*
* Exported for testing.
*/
export function getInitials(user: {name?: string, email?: string}) {
const source = (user.name && user.name.trim()) || (user.email && user.email.trim()) || '';
return source.split(/\s+/, 2).map(p => p.slice(0, 1)).join('');
}
/**
* Hashes the username to return a color.
*/
function pickColor(user: FullUser): string {
let c = hashCode(user.name + ':' + user.email) % someColors.length;
if (c < 0) { c += someColors.length; }
return someColors[c];
}
/**
* Hash a string into an integer. From https://stackoverflow.com/a/7616484/328565.
*/
function hashCode(str: string): number {
let hash: number = 0;
for (let i = 0; i < str.length; i++) {
// tslint:disable-next-line:no-bitwise
hash = ((hash << 5) - hash + str.charCodeAt(i)) | 0;
}
return hash;
}
// These mostly come from https://clrs.cc/
const someColors = [
'#0B437D',
'#0074D9',
'#7FDBFF',
'#39CCCC',
'#16DD6D',
'#2ECC40',
'#16B378',
'#EFCC00',
'#FF851B',
'#FF4136',
'#85144b',
'#F012BE',
'#B10DC9',
];
export const cssUserImage = styled('div', `
position: relative;
text-align: center;
text-transform: uppercase;
user-select: none;
-moz-user-select: none;
color: white;
border-radius: 100px;
display: flex;
align-items: center;
justify-content: center;
&-small {
width: 24px;
height: 24px;
font-size: 13.5px;
--reduced-font-size: 12px;
}
&-medium {
width: 32px;
height: 32px;
font-size: 18px;
--reduced-font-size: 16px;
}
&-large {
width: 40px;
height: 40px;
font-size: 22.5px;
--reduced-font-size: 20px;
}
&-anon {
border: 1px solid ${colors.slate};
color: ${colors.slate};
}
&-anon::before {
content: "?"
}
&-reduced {
font-size: var(--reduced-font-size);
}
`);
const cssUserPicture = styled('img', `
position: absolute;
width: 100%;
height: 100%;
object-fit: cover;
background-color: ${theme.menuBg};
border-radius: 100px;
box-sizing: content-box; /* keep the border outside of the size of the image */
`);