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import * as React from 'react';
import {Styles, HeaderSizes} from 'ts/types';
import {utils} from 'ts/utils/utils';
import {constants} from 'ts/utils/constants';
import {Link as ScrollLink} from 'react-scroll';
const headerSizeToScrollOffset: {[headerSize: string]: number} = {
h2: -20,
h3: 0,
};
interface AnchorTitleProps {
title: string|React.ReactNode;
id: string;
headerSize: HeaderSizes;
shouldShowAnchor: boolean;
}
interface AnchorTitleState {
isHovering: boolean;
}
const styles: Styles = {
anchor: {
fontSize: 20,
transform: 'rotate(45deg)',
cursor: 'pointer',
},
headers: {
WebkitMarginStart: 0,
WebkitMarginEnd: 0,
fontWeight: 'bold',
display: 'block',
},
h1: {
fontSize: '1.8em',
WebkitMarginBefore: '0.83em',
WebkitMarginAfter: '0.83em',
},
h2: {
fontSize: '1.5em',
WebkitMarginBefore: '0.83em',
WebkitMarginAfter: '0.83em',
},
h3: {
fontSize: '1.17em',
WebkitMarginBefore: '1em',
WebkitMarginAfter: '1em',
},
};
export class AnchorTitle extends React.Component<AnchorTitleProps, AnchorTitleState> {
constructor(props: AnchorTitleProps) {
super(props);
this.state = {
isHovering: false,
};
}
public render() {
let opacity = 0;
if (this.props.shouldShowAnchor) {
if (this.state.isHovering) {
opacity = 0.6;
} else {
opacity = 1;
}
}
return (
<div className="relative flex" style={{...styles[this.props.headerSize], ...styles.headers}}>
<div
className="inline-block"
style={{paddingRight: 4}}
>
{this.props.title}
</div>
<ScrollLink
to={this.props.id}
offset={headerSizeToScrollOffset[this.props.headerSize]}
duration={constants.DOCS_SCROLL_DURATION_MS}
containerId={constants.DOCS_CONTAINER_ID}
>
<i
className="zmdi zmdi-link"
onClick={utils.setUrlHash.bind(utils, this.props.id)}
style={{...styles.anchor, opacity}}
onMouseOver={this.setHoverState.bind(this, true)}
onMouseOut={this.setHoverState.bind(this, false)}
/>
</ScrollLink>
</div>
);
}
private setHoverState(isHovering: boolean) {
this.setState({
isHovering,
});
}
}
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