fix: Modalの挙動と外観を修正

packages/react/src/components/Modal/ModalPlumbing.tsx

@@ -1,20 +1,32 @@
-import { ModalTitle } from '.'
-import styled from 'styled-components'
+import { BottomSheet, ModalContext, ModalTitle } from '.'
+import styled, { css } from 'styled-components'
 import { theme } from '../../styled'
+import { useContext } from 'react'
+import { maxWidth } from '@charcoal-ui/utils'
 
 export function ModalHeader() {
+  const modalCtx = useContext(ModalContext)
   return (
-    <ModalHeaderRoot>
+    <ModalHeaderRoot $bottomSheet={modalCtx.bottomSheet}>
       <StyledModalTitle />
     </ModalHeaderRoot>
   )
 }
 
-const ModalHeaderRoot = styled.div`
+const ModalHeaderRoot = styled.div<{
+  $bottomSheet: BottomSheet
+}>`
   height: 64px;
   display: grid;
   align-content: center;
   justify-content: center;
+  @media ${({ theme }) => maxWidth(theme.breakpoint.screen1)} {
+    ${(p) =>
+      p.$bottomSheet !== false &&
+      css`
+        height: 48px;
+      `}
+  }
 `
 
 const StyledModalTitle = styled(ModalTitle)`

packages/react/src/components/Modal/__stories__/InternalScrollStory.tsx

@@ -0,0 +1,75 @@
+import { Story } from '../../../_lib/compat'
+import Modal, { BottomSheet, ModalProps } from '..'
+import { OverlayProvider } from '@react-aria/overlays'
+import { useOverlayTriggerState } from 'react-stately'
+import Button from '../../Button'
+import { ModalBody, ModalButtons, ModalHeader } from '../ModalPlumbing'
+import styled, { css } from 'styled-components'
+import { maxWidth } from '@charcoal-ui/utils'
+
+export const InternalScrollStory: Story<ModalProps> = (args: ModalProps) => {
+  const state = useOverlayTriggerState({})
+  return (
+    <OverlayProvider>
+      <Button onClick={() => state.open()}>Open Modal</Button>
+
+      <Modal {...args} isOpen={state.isOpen} onClose={() => state.close()}>
+        <ModalHeader />
+        <ModalBody>
+          <ModalBodyOverflowDiv $offset={56} $bottomSheet={args.bottomSheet}>
+            <div
+              style={{
+                height: 1000,
+                background: `linear-gradient(#e66465, #9198e5)`,
+              }}
+            ></div>
+          </ModalBodyOverflowDiv>
+          <TopBorderButtons>
+            <Button fullWidth onClick={() => state.close()}>
+              Close
+            </Button>
+          </TopBorderButtons>
+        </ModalBody>
+      </Modal>
+    </OverlayProvider>
+  )
+}
+
+// underlay padding-top: 40px (desktop)
+// underlay padding-bottom: 40px (desktop)
+// modal header: 64px (desktop)
+// modal header: 48px (mobile-bottom-sheet)
+// modal padding-bottom: 40px
+// button and space: 56px
+const MAX_HEIGHT_OFFSET = 64 + 40 + 40 + 40
+const MAX_HEIGHT_OFFSET_MOBILE = MAX_HEIGHT_OFFSET - 40 * 2 - 16
+const ModalBodyOverflowDiv = styled.div<{
+  $offset: number
+  $bottomSheet?: BottomSheet
+}>`
+  overflow: auto;
+  max-height: calc(
+    100vh - ${MAX_HEIGHT_OFFSET}px - ${({ $offset }) => $offset}px
+  );
+  ${({ $bottomSheet, $offset }) =>
+    ($bottomSheet === true || $bottomSheet === 'full') &&
+    css`
+      @media ${({ theme }) => maxWidth(theme.breakpoint.screen1)} {
+        max-height: calc(100vh - ${MAX_HEIGHT_OFFSET_MOBILE}px - ${$offset}px);
+      }
+    `}
+`
+
+const TopBorderButtons = styled(ModalButtons)`
+  position: relative;
+  &::before {
+    content: '';
+    pointer-events: none;
+    border-top: 1px solid ${({ theme }) => theme.border.default.color};
+    position: absolute;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+  }
+`

packages/react/src/components/Modal/index.story.tsx

@@ -43,51 +43,52 @@ const DefaultStory = (args: ModalProps) => {
     // hidden from screen readers when a modal opens.
     <OverlayProvider>
       <Button onClick={() => state.open()}>Open Modal</Button>
-
-      <Modal
+      <M
         {...args}
+        isDismissable
         isOpen={state.isOpen}
         onClose={() => state.close()}
-        isDismissable
-      >
-        <ModalHeader />
-        <ModalBody>
-          <ModalVStack>
-            <StyledModalText>
-              Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod
-              placeat tenetur, necessitatibus laudantium cumque exercitationem
-              provident. Quaerat iure enim, eveniet dolores earum odio quo
-              possimus fugiat aspernatur, numquam, commodi repellat.
-            </StyledModalText>
-            <ModalAlign>
-              <TextField
-                showLabel
-                label="Name"
-                placeholder="Nagisa"
-              ></TextField>
-            </ModalAlign>
-            <ModalAlign>
-              <TextField
-                showLabel
-                label="Country"
-                placeholder="Tokyo"
-              ></TextField>
-            </ModalAlign>
-          </ModalVStack>
-          <ModalButtons>
-            <Button variant="Primary" onClick={() => state.close()} fullWidth>
-              Apply
-            </Button>
-            <Button onClick={() => state.close()} fullWidth>
-              Cancel
-            </Button>
-          </ModalButtons>
-        </ModalBody>
-      </Modal>
+      />
     </OverlayProvider>
   )
 }
 
+const M = (props: ModalProps) => {
+  return (
+    <Modal {...props}>
+      <ModalHeader />
+      <ModalBody>
+        <ModalVStack>
+          <StyledModalText>
+            Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod
+            placeat tenetur, necessitatibus laudantium cumque exercitationem
+            provident. Quaerat iure enim, eveniet dolores earum odio quo
+            possimus fugiat aspernatur, numquam, commodi repellat.
+          </StyledModalText>
+          <ModalAlign>
+            <TextField showLabel label="Name" placeholder="Nagisa"></TextField>
+          </ModalAlign>
+          <ModalAlign>
+            <TextField
+              showLabel
+              label="Country"
+              placeholder="Tokyo"
+            ></TextField>
+          </ModalAlign>
+        </ModalVStack>
+        <ModalButtons>
+          <Button variant="Primary" onClick={() => props.onClose()} fullWidth>
+            Apply
+          </Button>
+          <Button onClick={() => props.onClose()} fullWidth>
+            Cancel
+          </Button>
+        </ModalButtons>
+      </ModalBody>
+    </Modal>
+  )
+}
+
 const ModalVStack = styled.div`
   display: grid;
   gap: 24px;
@@ -192,3 +193,5 @@ const BottomSheetStory = (args: ModalProps) => {
 }
 
 export const BottomSheet: Story<ModalProps> = BottomSheetStory.bind({})
+
+export { InternalScrollStory as InternalScroll } from './__stories__/InternalScrollStory'