Docs: Added new banner

docs/docs-components/AppLayout.tsx

@@ -1,6 +1,6 @@
 import { Fragment, ReactNode, useEffect, useState } from 'react';
 import { useRouter } from 'next/router';
-import { Box, DeviceTypeProvider, Divider, FixedZIndex, Flex } from 'gestalt';
+import { Box, Button, DeviceTypeProvider, Divider, FixedZIndex, Flex, Icon, Text } from 'gestalt';
 import {
   TOKEN_COLOR_GRAY_ROBOFLOW_700,
   TOKEN_COLOR_ORANGE_FIRETINI_0,
@@ -13,9 +13,11 @@ import Header from './Header';
 import { useNavigationContext } from './navigationContext';
 import ResourcesFooter from './ResourcesFooter';
 import SkipToContent from './SkipToContent';
+import useBannerResize, { SM_BREAKPOINT } from './useBannerResize';
 
 export const CONTENT_MAX_WIDTH_PX = 1200;
 const HEADER_HEIGHT_WITH_MARGIN = 90;
+
 const fullWidthPages = ['home'];
 const fullBleedNoNavigationPages = ['integration-test'];
 
@@ -24,6 +26,64 @@ type Props = {
   colorScheme?: 'light' | 'dark';
 };
 
+function Banner() {
+  const { maxWidth: bannerTextMaxWidth, breakpoint } = useBannerResize();
+
+  const handleClick = () => {
+    window.location.href = 'https://gestalt.pinterest.systems';
+  };
+
+  const isSMBreakpoint = breakpoint === SM_BREAKPOINT;
+
+  return (
+    <Box
+      alignItems="end"
+      dangerouslySetInlineStyle={{
+        __style: { backgroundColor: '#EBEEFF' },
+      }}
+      direction="column"
+      display="flex"
+      justifyContent="between"
+      paddingX={4}
+      paddingY={4}
+      role="banner"
+      smAlignItems="center"
+      smDirection="row"
+      smPaddingX={8}
+      smPaddingY={6}
+    >
+      <Flex alignItems="start" direction="row" gap={isSMBreakpoint ? 1 : 4}>
+        <Icon
+          accessibilityLabel="Information"
+          color="info"
+          icon="circle-information-fill"
+          size={isSMBreakpoint ? 16 : 24}
+        />
+
+        <Flex direction="column" gap={1} maxWidth={bannerTextMaxWidth}>
+          <Text size={isSMBreakpoint ? '300' : '400'} weight="bold">
+            This is Gestalt’s legacy documentation
+          </Text>
+
+          <Text size={isSMBreakpoint ? '200' : '300'}>
+            Information might be outdated. For the latest documentation and support, visit Gestalt’s
+            new documentation website.
+          </Text>
+        </Flex>
+      </Flex>
+
+      <Box marginTop={4} smMarginTop={0}>
+        <Button
+          color="red"
+          onClick={handleClick}
+          size={isSMBreakpoint ? 'sm' : 'lg'}
+          text="Explore Gestalt 2.0"
+        />
+      </Box>
+    </Box>
+  );
+}
+
 export default function AppLayout({ children, colorScheme }: Props) {
   const { isMobile } = useDocsConfig();
   const { isSidebarOpen, setIsSidebarOpen } = useNavigationContext();
@@ -57,6 +117,7 @@ export default function AppLayout({ children, colorScheme }: Props) {
 
   let pageContent = (
     <Box color="default" minHeight="100vh">
+      <Banner />
       <SkipToContent />
       <Header />
       {isSidebarOpen && (

docs/docs-components/useBannerResize.ts

@@ -0,0 +1,61 @@
+import { useEffect, useState } from 'react';
+
+const BANNER_TEXT_MAX_WIDTH = 545;
+const BANNER_TEXT_MD_MAX_WIDTH = 450;
+
+const SM_BREAKPOINT_PX = 576;
+const MD_BREAKPOINT_PX = 768;
+const LG_BREAKPOINT_PX = 992;
+
+export const SM_BREAKPOINT = 'sm';
+export const MD_BREAKPOINT = 'md';
+export const LG_BREAKPOINT = 'lg';
+
+const useBannerResize = (): { maxWidth: number | string; breakpoint: string } => {
+  const [maxWidth, setMaxWidth] = useState<number | string>(BANNER_TEXT_MAX_WIDTH);
+  const [breakpoint, setBreakpoint] = useState<string>(LG_BREAKPOINT);
+
+  useEffect(() => {
+    const compute = () => {
+      if (typeof window === 'undefined') return;
+
+      const containerWidth = window.innerWidth;
+
+      if (containerWidth >= LG_BREAKPOINT_PX) {
+        setMaxWidth(BANNER_TEXT_MAX_WIDTH);
+      } else if (containerWidth >= MD_BREAKPOINT_PX) {
+        setMaxWidth(BANNER_TEXT_MD_MAX_WIDTH);
+      } else if (containerWidth > SM_BREAKPOINT_PX) {
+        setMaxWidth(450);
+      } else {
+        setMaxWidth('100%');
+      }
+
+      if (containerWidth <= SM_BREAKPOINT_PX) {
+        setBreakpoint(SM_BREAKPOINT);
+      } else if (containerWidth <= MD_BREAKPOINT_PX) {
+        setBreakpoint(MD_BREAKPOINT);
+      } else {
+        setBreakpoint(LG_BREAKPOINT);
+      }
+    };
+
+    // Initial evaluation
+    compute();
+
+    // Respond to viewport resizes
+    if (typeof window !== 'undefined') {
+      window.addEventListener('resize', compute);
+    }
+
+    return () => {
+      if (typeof window !== 'undefined') {
+        window.removeEventListener('resize', compute);
+      }
+    };
+  }, []);
+
+  return { maxWidth, breakpoint };
+};
+
+export default useBannerResize;