From 39a2383b8cb89c90040745d19cae447cde7318be Mon Sep 17 00:00:00 2001
From: EnixCoda <enixcoda@gmail.com>
Date: Mon, 15 Jul 2024 12:51:48 +0800
Subject: [PATCH] feat: sidebar on the right side

---
 src/components/ResizeHandler.tsx            |   8 +-
 src/components/SideBar.tsx                  |  32 +++++--
 src/components/SideBarResizeHandler.tsx     |  10 +-
 src/components/ToggleShowButton.tsx         |   7 +-
 src/components/settings/SidebarSettings.tsx |  20 ++++
 src/styles/gitee.scss                       |   8 +-
 src/styles/github.scss                      |  10 +-
 src/styles/index.scss                       | 101 ++++++++++++++++----
 src/utils/DOMHelper.ts                      |  16 +++-
 src/utils/config/helper.ts                  |   3 +
 src/utils/hooks/useResizeHandler.ts         |  22 +++--
 11 files changed, 190 insertions(+), 47 deletions(-)

diff --git a/src/components/ResizeHandler.tsx b/src/components/ResizeHandler.tsx
index 76be3b6..521338f 100644
--- a/src/components/ResizeHandler.tsx
+++ b/src/components/ResizeHandler.tsx
@@ -1,19 +1,19 @@
 import { GrabberIcon } from '@primer/octicons-react'
 import { Icon } from 'components/Icon'
 import * as React from 'react'
-import { ResizeState, useResizeHandler } from '../utils/hooks/useResizeHandler'
+import { ResizeHandlerOptions, useResizeHandler } from '../utils/hooks/useResizeHandler'
 import { Size2D } from './Size'
 
 type Props = {
   size: Size2D
   onResize(size: Size2D): void
   onResetSize?(): void
-  onResizeStateChange?(state: ResizeState): void
+  options?: ResizeHandlerOptions
   style?: React.CSSProperties
 }
 
-export function ResizeHandler({ onResize, onResetSize, onResizeStateChange, size, style }: Props) {
-  const { onPointerDown } = useResizeHandler(size, onResize, { onResizeStateChange })
+export function ResizeHandler({ onResize, onResetSize, options, size, style }: Props) {
+  const { onPointerDown } = useResizeHandler(size, onResize, options)
 
   return (
     <div
diff --git a/src/components/SideBar.tsx b/src/components/SideBar.tsx
index 1f7d9ed..fa59de9 100644
--- a/src/components/SideBar.tsx
+++ b/src/components/SideBar.tsx
@@ -63,6 +63,8 @@ export function SideBar() {
 
   const sidebarContextValue = React.useMemo(() => ({ pendingFocusTarget }), [pendingFocusTarget])
 
+  const placement = configContext.value.sidebarPlacement
+
   return (
     <Theme>
       <ToggleShowButtonWrapper
@@ -73,15 +75,23 @@ export function SideBar() {
       <SidebarContext.Provider value={sidebarContextValue}>
         <div className={'gitako-side-bar'}>
           <div
-            className={cx('gitako-side-bar-body-wrapper', `toggle-mode-${sidebarToggleMode}`, {
-              collapsed: error || !shouldExpand,
-            })}
+            className={cx(
+              'gitako-side-bar-body-wrapper',
+              `toggle-mode-${sidebarToggleMode}`,
+              `placement-${placement}`,
+              {
+                collapsed: error || !shouldExpand,
+              },
+            )}
             style={{ height: heightForSafari }}
             onMouseLeave={() => {
               if (blockLeaveRef.current) return
               if (sidebarToggleMode === 'float') setShouldExpand(false)
             }}
           >
+            {features.resize && placement === 'right' && (
+              <SideBarResizeHandler onResizeStateChange={onResizeStateChange} />
+            )}
             <div className={'gitako-side-bar-body'}>
               <div className={'gitako-side-bar-content'}>
                 <div className={'header'}>
@@ -156,7 +166,9 @@ export function SideBar() {
                 }}
               </IIFC>
             </div>
-            {features.resize && <SideBarResizeHandler onResizeStateChange={onResizeStateChange} />}
+            {features.resize && placement === 'left' && (
+              <SideBarResizeHandler onResizeStateChange={onResizeStateChange} />
+            )}
           </div>
         </div>
       </SidebarContext.Provider>
@@ -220,17 +232,17 @@ function useLogoContainerElement() {
 }
 
 function useUpdateBodyIndentOnStateUpdate(shouldExpand: boolean) {
-  const { sidebarToggleMode } = useConfigs().value
+  const { sidebarToggleMode, sidebarPlacement } = useConfigs().value
   React.useEffect(() => {
     if (!(sidebarToggleMode === 'persistent' && shouldExpand)) return
 
     const detach = DOMHelper.attachStickyBodyIndent()
-    DOMHelper.setBodyIndent(true)
+    DOMHelper.setBodyIndent(sidebarPlacement)
     return () => {
       detach()
       DOMHelper.setBodyIndent(false)
     }
-  }, [sidebarToggleMode, shouldExpand])
+  }, [sidebarToggleMode, shouldExpand, sidebarPlacement])
 }
 
 const getDerivedExpansion = ({
@@ -252,7 +264,7 @@ function useGetDerivedExpansion() {
 }
 
 function useUpdateBodyIndentAfterRedirect(update: (shouldExpand: boolean) => void) {
-  const { intelligentToggle, sidebarToggleMode } = useConfigs().value
+  const { intelligentToggle, sidebarToggleMode, sidebarPlacement } = useConfigs().value
   useAfterRedirect(
     React.useCallback(() => {
       // check and update expand state if pinned and auto-expand checked
@@ -260,9 +272,9 @@ function useUpdateBodyIndentAfterRedirect(update: (shouldExpand: boolean) => voi
         const shouldExpand = getDerivedExpansion({ intelligentToggle, sidebarToggleMode })
         update(shouldExpand)
         // Below DOM mutation cannot be omitted, if do, body indent may get lost when shouldExpand is true for both before & after redirecting
-        DOMHelper.setBodyIndent(shouldExpand)
+        DOMHelper.setBodyIndent(sidebarPlacement)
       }
-    }, [update, sidebarToggleMode, intelligentToggle]),
+    }, [update, sidebarToggleMode, intelligentToggle, sidebarPlacement]),
   )
 }
 
diff --git a/src/components/SideBarResizeHandler.tsx b/src/components/SideBarResizeHandler.tsx
index 4d91b2a..a876be2 100644
--- a/src/components/SideBarResizeHandler.tsx
+++ b/src/components/SideBarResizeHandler.tsx
@@ -4,6 +4,7 @@ import { useDebounce, useLatest, useWindowSize } from 'react-use'
 import { getDefaultConfigs } from 'utils/config/helper'
 import * as DOMHelper from 'utils/DOMHelper'
 import { useAfterRedirect } from 'utils/hooks/useFastRedirect'
+import { ResizeHandlerOptions } from 'utils/hooks/useResizeHandler'
 import { getSafeWidth } from '../utils/getSafeWidth'
 import { ResizeHandler } from './ResizeHandler'
 import { Size, Size2D } from './Size'
@@ -41,7 +42,7 @@ function useSidebarWidth() {
 
 export function SideBarResizeHandler({
   onResizeStateChange,
-}: Pick<React.ComponentProps<typeof ResizeHandler>, 'onResizeStateChange'>) {
+}: Pick<ResizeHandlerOptions, 'onResizeStateChange'>) {
   const [width, setWidth] = useSidebarWidth()
   const { width: windowWidth } = useWindowSize()
   const onResize = React.useMemo(() => {
@@ -71,11 +72,16 @@ export function SideBarResizeHandler({
 
   const dummySize: Size2D = React.useMemo(() => [width, 0], [width])
 
+  const placement = useConfigs().value.sidebarPlacement
+
   return (
     <ResizeHandler
       onResize={onResize}
       onResetSize={onResetSize}
-      onResizeStateChange={onResizeStateChange}
+      options={{
+        onResizeStateChange,
+        direction: placement === 'left' ? 'right' : 'left',
+      }}
       size={dummySize}
     />
   )
diff --git a/src/components/ToggleShowButton.tsx b/src/components/ToggleShowButton.tsx
index 11f83b4..0b563ec 100644
--- a/src/components/ToggleShowButton.tsx
+++ b/src/components/ToggleShowButton.tsx
@@ -63,8 +63,13 @@ export function ToggleShowButton({ className, onClick, onHover }: Props) {
     { onClick },
   )
 
+  const placement = config.value.sidebarPlacement
+
   return (
-    <div ref={ref} className={cx('gitako-toggle-show-button-wrapper', className)}>
+    <div
+      ref={ref}
+      className={cx('gitako-toggle-show-button-wrapper', `placement-${placement}`, className)}
+    >
       <button
         className={cx('gitako-toggle-show-button', {
           error,
diff --git a/src/components/settings/SidebarSettings.tsx b/src/components/settings/SidebarSettings.tsx
index ff8b0f2..6c40924 100644
--- a/src/components/settings/SidebarSettings.tsx
+++ b/src/components/settings/SidebarSettings.tsx
@@ -4,6 +4,7 @@ import * as React from 'react'
 import { subIO } from 'utils/general'
 import { KeyboardShortcutSetting } from './KeyboardShortcutSetting'
 import { SettingsSection } from './SettingsSection'
+import { SimpleConfigFieldSelect } from './SimpleConfigField/SelectInput'
 
 export function SidebarSettings() {
   const { sidebarToggleMode } = useConfigs().value
@@ -18,6 +19,25 @@ export function SidebarSettings() {
         label={'Keyboard shortcut for focus search input'}
         {...subIO(useConfigs(), 'focusSearchInputShortcut')}
       />
+      <SimpleConfigFieldSelect
+        field={{
+          key: 'sidebarPlacement',
+          label: 'Sidebar placement',
+          tooltip: 'Change the position of the sidebar',
+        }}
+        options={[
+          {
+            key: 'left',
+            value: 'left',
+            label: 'Left',
+          },
+          {
+            key: 'right',
+            value: 'right',
+            label: 'Right',
+          },
+        ]}
+      />
       <SimpleConfigFieldCheckbox
         field={{
           key: 'intelligentToggle',
diff --git a/src/styles/gitee.scss b/src/styles/gitee.scss
index 232342d..e596453 100644
--- a/src/styles/gitee.scss
+++ b/src/styles/gitee.scss
@@ -29,13 +29,19 @@ $gitee-header-z-index: 1002;
       }
     }
 
-    &[data-with-gitako-spacing='true'] {
+    &[data-with-gitako-spacing='left'] {
       body {
         width: auto; // shrink width
         .site-content {
           min-width: 1040px;
         }
       }
+
+      &[data-with-gitako-spacing='right'] {
+        body {
+          min-width: calc(1040px + var(--gitako-width));
+        }
+      }
     }
   }
 }
diff --git a/src/styles/github.scss b/src/styles/github.scss
index 0063545..ae976fc 100644
--- a/src/styles/github.scss
+++ b/src/styles/github.scss
@@ -1,9 +1,15 @@
 @mixin github($github-content-width) {
-  [data-gitako-platform='GitHub'] {
-    @media (min-width: $github-content-width) {
+  @media (min-width: $github-content-width) {
+    [data-gitako-platform='GitHub'] {
       body {
         min-width: $github-content-width;
       }
+
+      &[data-with-gitako-spacing='right'] {
+        body {
+          min-width: calc(#{$github-content-width} + var(--gitako-width));
+        }
+      }
     }
   }
 }
diff --git a/src/styles/index.scss b/src/styles/index.scss
index 9cc5a42..299cadc 100644
--- a/src/styles/index.scss
+++ b/src/styles/index.scss
@@ -40,12 +40,23 @@ $minimal-z-index: max(
   }
 }
 
-html[data-with-gitako-spacing='true'] {
-  body,
+html {
+  &[data-with-gitako-spacing='left'] {
+    body,
   .AppHeader deferred-side-panel div[data-modal-dialog-overlay] // side panel opened via clicking github top-left icon in global navigation mode
-  {
-    @media screen {
-      margin-left: var(--gitako-width);
+    {
+      @media screen {
+        margin-left: var(--gitako-width);
+      }
+    }
+  }
+
+  &[data-with-gitako-spacing='right'] {
+    body,
+    .AppHeader deferred-side-panel div[data-modal-dialog-overlay] {
+      @media screen {
+        margin-right: var(--gitako-width);
+      }
     }
   }
 }
@@ -72,13 +83,55 @@ html[data-with-gitako-spacing='true'] {
   z-index: $minimal-z-index;
   position: fixed;
   top: 124px; // align with GitHub's navbar items
-  left: 0px;
   display: inline-flex;
   align-items: center;
-  transition: left 0.25s linear;
+  transition: all 0.25s linear;
+  transition-property: left, right;
 
-  &.hidden {
-    left: -40px;
+  &.placement-left {
+    left: 0px;
+
+    &.hidden {
+      left: -40px;
+    }
+
+    .#{$name}-toggle-show-button {
+      left: -8px;
+
+      .tentacle {
+        transform: translateX(-8px);
+      }
+
+      &:active,
+      &:hover {
+        .tentacle {
+          transform: translateX(-4px);
+        }
+      }
+    }
+  }
+
+  &.placement-right {
+    right: 0;
+
+    &.hidden {
+      right: -40px;
+    }
+
+    .#{$name}-toggle-show-button {
+      left: 8px;
+
+      .tentacle {
+        transform: translateX(8px) scale(-1, 1);
+      }
+
+      &:active,
+      &:hover {
+        .tentacle {
+          transform: translateX(4px) scale(-1, 1);
+        }
+      }
+    }
   }
 
   .#{$name}-toggle-show-button {
@@ -87,7 +140,6 @@ html[data-with-gitako-spacing='true'] {
     border: none;
     padding: 0;
     position: relative;
-    left: -8px;
 
     &.error {
       cursor: not-allowed;
@@ -98,13 +150,11 @@ html[data-with-gitako-spacing='true'] {
       height: 40px;
       object-fit: contain;
       transition: all ease 0.4s;
-      transform: translateX(-8px);
       filter: drop-shadow(0 0 1px var(--color-primer-canvas-backdrop));
     }
     &:active,
     &:hover {
       .tentacle {
-        transform: translateX(-4px);
         filter: drop-shadow(0 0 2px var(--color-primer-canvas-backdrop));
       }
     }
@@ -136,11 +186,32 @@ html[data-with-gitako-spacing='true'] {
   .#{$name}-side-bar-body-wrapper {
     position: fixed;
     top: 0;
-    left: 0;
     height: 100vh;
     z-index: $minimal-z-index;
     display: flex;
 
+    &.placement-left {
+      left: 0;
+
+      &.toggle-mode-float {
+        left: 0;
+        &.collapsed {
+          left: calc(0px - #{$resizeHandlerWidth} - var(--gitako-width));
+        }
+      }
+    }
+
+    &.placement-right {
+      right: 0;
+
+      &.toggle-mode-float {
+        right: 0;
+        &.collapsed {
+          right: calc(0px - #{$resizeHandlerWidth} - var(--gitako-width));
+        }
+      }
+    }
+
     &.toggle-mode-persistent {
       &.collapsed {
         @extend %hidden;
@@ -148,11 +219,7 @@ html[data-with-gitako-spacing='true'] {
     }
 
     &.toggle-mode-float {
-      left: 0;
       transition: all 0.25s cubic-bezier(0.55, 0.06, 0.68, 0.19); // values from Chrome devtools
-      &.collapsed {
-        left: calc(0px - #{$resizeHandlerWidth} - var(--gitako-width));
-      }
     }
   }
   .#{$name}-resize-handler {
diff --git a/src/utils/DOMHelper.ts b/src/utils/DOMHelper.ts
index 1eecfdf..d821ce7 100644
--- a/src/utils/DOMHelper.ts
+++ b/src/utils/DOMHelper.ts
@@ -4,6 +4,7 @@
 
 import { platformName } from 'platforms'
 import { $ } from './$'
+import { Config } from './config/helper'
 
 export const rootElementID = 'gitako-root'
 export const gitakoDescriptionTarget = document.documentElement
@@ -82,10 +83,19 @@ export function markGitakoPlatform() {
 const spacingAttributeName = 'data-with-gitako-spacing'
 export const attachStickyBodyIndent = () =>
   attachStickyDataAttribute(gitakoDescriptionTarget, spacingAttributeName, ({ oldValue }) =>
-    setBodyIndent(oldValue === 'true'),
+    setBodyIndent(
+      (oldValue &&
+        (
+          {
+            left: 'left',
+            right: 'right',
+          } as const
+        )[oldValue]) ||
+        'left',
+    ),
   )
-export function setBodyIndent(shouldShowGitako: boolean) {
-  gitakoDescriptionTarget.setAttribute(spacingAttributeName, `${shouldShowGitako}`)
+export function setBodyIndent(placement: Config['sidebarPlacement'] | false) {
+  gitakoDescriptionTarget.setAttribute(spacingAttributeName, `${placement}`)
 }
 
 /**
diff --git a/src/utils/config/helper.ts b/src/utils/config/helper.ts
index 6b11989..ac46372 100644
--- a/src/utils/config/helper.ts
+++ b/src/utils/config/helper.ts
@@ -22,6 +22,7 @@ export type Config = {
   restoreExpandedFolders: boolean
   pjaxMode: 'native' | 'pjax-api'
   showDiffInText: boolean
+  sidebarPlacement: 'left' | 'right'
   __showInspector?: boolean
 }
 
@@ -46,6 +47,7 @@ enum configKeys {
   restoreExpandedFolders = 'restoreExpandedFolders',
   pjaxMode = 'pjaxMode',
   showDiffInText = 'showDiffInText',
+  sidebarPlacement = 'sidebarPlacement',
   __showInspector = '__showInspector',
 }
 
@@ -72,6 +74,7 @@ export const getDefaultConfigs: () => Config = () => ({
   restoreExpandedFolders: true,
   pjaxMode: platformName === 'GitHub' ? 'native' : 'pjax-api', // use native on GitHub
   showDiffInText: false,
+  sidebarPlacement: 'left',
 })
 
 const configKeyArray = Object.values(configKeys)
diff --git a/src/utils/hooks/useResizeHandler.ts b/src/utils/hooks/useResizeHandler.ts
index 678a19e..cec3142 100644
--- a/src/utils/hooks/useResizeHandler.ts
+++ b/src/utils/hooks/useResizeHandler.ts
@@ -3,6 +3,13 @@ import { Size2D } from '../../components/Size'
 
 export type ResizeState = 'idle' | 'resizing'
 
+export type ResizeHandlerOptions = Partial<{
+  onResizeStateChange: (state: ResizeState) => void
+  onClick: (e: PointerEvent) => void
+  distanceTolerance: number
+  direction: 'right' | 'left'
+}>
+
 export function useResizeHandler(
   size: Size2D,
   onResize: (size: Size2D) => void,
@@ -10,17 +17,18 @@ export function useResizeHandler(
     onResizeStateChange,
     onClick,
     distanceTolerance = 2,
-  }: Partial<{
-    onResizeStateChange: (state: ResizeState) => void
-    onClick: (e: PointerEvent) => void
-    distanceTolerance: number
-  }> = {},
+    direction = 'right',
+  }: ResizeHandlerOptions = {},
 ) {
   const pointerDown = React.useRef(false)
   const pointerMoved = React.useRef(false)
   const initialSizeRef = React.useRef([0, 0])
   const baseSize = React.useRef(size)
   const latestPropSize = React.useRef(size)
+  const fix = {
+    left: -1,
+    right: 1,
+  }[direction]
 
   React.useEffect(() => {
     latestPropSize.current = size
@@ -34,11 +42,11 @@ export function useResizeHandler(
       pointerMoved.current =
         pointerMoved.current || (clientX - x0) ** 2 + (clientY - y0) ** 2 > distanceTolerance ** 2
       const [x1, y1] = baseSize.current
-      onResize([x1 + clientX - x0, y1 + clientY - y0])
+      onResize([x1 + (clientX - x0) * fix, y1 + (clientY - y0) * fix])
     }
     window.addEventListener('pointermove', onPointerMove)
     return () => window.removeEventListener('pointermove', onPointerMove)
-  }, [onResize, distanceTolerance])
+  }, [onResize, distanceTolerance, fix])
 
   React.useEffect(() => {
     const onPointerUp = (e: PointerEvent) => {