1 files changed, 98 insertions, 0 deletions
diff --git a/packages/website/ts/pages/shared/anchor_title.tsx b/packages/website/ts/pages/shared/anchor_title.tsx
new file mode 100644
index 000000000..dfa9401ae
--- /dev/null
+++ b/packages/website/ts/pages/shared/anchor_title.tsx
@@ -0,0 +1,98 @@
+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,
+        });
+    }
+}