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import * as React from 'react';
import { Link as ScrollLink } from 'react-scroll';
import { HeaderSizes, Styles } from '../types';
import { colors } from '../utils/colors';
import { constants } from '../utils/constants';
const headerSizeToScrollOffset: { [headerSize: string]: number } = {
h2: -20,
h3: 0,
};
export interface AnchorTitleProps {
title: string | React.ReactNode;
id: string;
headerSize: HeaderSizes;
shouldShowAnchor: boolean;
isDisabled?: boolean;
}
export interface AnchorTitleState {
isHovering: boolean;
}
const styles: Styles = {
anchor: {
fontSize: 20,
transform: 'rotate(45deg)',
cursor: 'pointer',
},
h1: {
fontSize: '30px',
},
h2: {
fontSize: '1.5em',
fontWeight: 400,
},
h3: {
fontSize: '1.17em',
},
};
export class AnchorTitle extends React.Component<AnchorTitleProps, AnchorTitleState> {
public static defaultProps: Partial<AnchorTitleProps> = {
isDisabled: false,
};
constructor(props: AnchorTitleProps) {
super(props);
this.state = {
isHovering: false,
};
}
public render(): React.ReactNode {
let opacity = 0;
if (this.props.shouldShowAnchor) {
opacity = this.state.isHovering ? 0.6 : 1;
}
return (
<div
className="relative flex"
style={
{
...styles[this.props.headerSize],
fontWeight: 'bold',
display: 'block',
WebkitMarginStart: 0,
WebkitMarginEnd: 0,
} as any
}
>
<div className="inline-block" style={{ paddingRight: 4, color: colors.darkestGrey }}>
{this.props.title}
</div>
{!this.props.isDisabled && (
<ScrollLink
to={this.props.id}
hashSpy={true}
offset={headerSizeToScrollOffset[this.props.headerSize]}
duration={constants.DOCS_SCROLL_DURATION_MS}
containerId={constants.SCROLL_CONTAINER_ID}
>
<i
className="zmdi zmdi-link"
style={{ ...styles.anchor, opacity }}
onMouseOver={this._setHoverState.bind(this, true)}
onMouseOut={this._setHoverState.bind(this, false)}
/>
</ScrollLink>
)}
</div>
);
}
private _setHoverState(isHovering: boolean): void {
this.setState({
isHovering,
});
}
}
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