From 23a310f9864e3339b23dac70acc70fa213354446 Mon Sep 17 00:00:00 2001
From: Julien Calixte <julienc@bam.tech>
Date: Sun, 14 Mar 2021 21:11:06 +0100
Subject: [PATCH] :sparkles: (stacked notes) smooth scroll to focused note

---
 src/constants/note-width.ts      |  1 +
 src/hooks/useNote.hook.ts        | 66 +++++++++++++++++++++++++++++---
 src/hooks/useNoteOverlay.hook.ts |  2 +-
 src/hooks/useOverlay.hook.ts     | 23 +++++++----
 src/styles/app.scss              |  1 +
 5 files changed, 78 insertions(+), 15 deletions(-)
 create mode 100644 src/constants/note-width.ts

diff --git a/src/constants/note-width.ts b/src/constants/note-width.ts
new file mode 100644
index 0000000..85a7bf3
--- /dev/null
+++ b/src/constants/note-width.ts
@@ -0,0 +1 @@
+export const NOTE_WIDTH = 620
diff --git a/src/hooks/useNote.hook.ts b/src/hooks/useNote.hook.ts
index f11b120..0e70096 100644
--- a/src/hooks/useNote.hook.ts
+++ b/src/hooks/useNote.hook.ts
@@ -1,10 +1,18 @@
 import { Ref, ref } from '@vue/reactivity'
-import { computed, nextTick, onUnmounted, watch } from '@vue/runtime-core'
+import {
+  computed,
+  nextTick,
+  onMounted,
+  onUnmounted,
+  watch
+} from '@vue/runtime-core'
 import { useRoute, useRouter } from 'vue-router'
 
 import { noteEventBus } from '@/bus/noteBusEvent'
 import { useLinks } from '@/hooks/useLinks.hook'
 import { useRepo } from '@/hooks/useRepo.hook'
+import { NOTE_WIDTH } from '@/constants/note-width'
+import { useOverlay } from '@/hooks/useOverlay.hook'
 
 const sanitizePath = (path: string) => {
   if (path.startsWith('./')) {
@@ -13,9 +21,15 @@ const sanitizePath = (path: string) => {
   return decodeURIComponent(path)
 }
 
-export const useNote = (user: Ref<string>, repo: Ref<string>) => {
+export const useNote = (
+  containerClass: string,
+  user: Ref<string>,
+  repo: Ref<string>
+) => {
   const { push } = useRouter()
   const { query } = useRoute()
+  const { scrollTo } = useOverlay(false)
+
   const stackedNotes = ref(
     query.stackedNotes
       ? Array.isArray(query.stackedNotes)
@@ -26,19 +40,38 @@ export const useNote = (user: Ref<string>, repo: Ref<string>) => {
 
   const { readme, notFound, tree } = useRepo(user, repo)
   const { listenToClick } = useLinks('note-display')
-  const titles = computed(() => {
-    return stackedNotes.value.reduce((obj: Record<string, string>, note) => {
+
+  const titles = computed(() =>
+    stackedNotes.value.reduce((obj: Record<string, string>, note) => {
       if (!note) {
         return obj
       }
       const filePath = tree.value.find((file) => file.sha === note)?.path ?? ''
+
       const fileNames = filePath.split('.')
+
       fileNames.pop()
-      obj[note] = fileNames.join('.')
+      obj[note] = fileNames
+        .join('.')
+        .split('/')
+        .filter((path) => !path.includes('README'))
+        .join('/')
 
       return obj
     }, {})
-  })
+  )
+
+  const scrollToFocusedNote = (sha?: string) => {
+    if (!sha) {
+      return
+    }
+    nextTick(() => {
+      const index = stackedNotes.value.findIndex((noteSHA) => noteSHA === sha)
+      const left = index * NOTE_WIDTH
+
+      scrollTo(left)
+    })
+  }
 
   const unsubscribe = noteEventBus.addEventBusListener(
     ({ path, currentNoteSHA }) => {
@@ -55,6 +88,7 @@ export const useNote = (user: Ref<string>, repo: Ref<string>) => {
       const file = tree.value.find((file) => file.path === finalPath)
 
       if (!file?.sha || stackedNotes.value.includes(file.sha)) {
+        scrollToFocusedNote(file?.sha)
         return
       }
 
@@ -92,6 +126,8 @@ export const useNote = (user: Ref<string>, repo: Ref<string>) => {
       })
 
       stackedNotes.value = newStackedNotes
+
+      scrollToFocusedNote(file.sha)
     }
   )
 
@@ -101,10 +137,28 @@ export const useNote = (user: Ref<string>, repo: Ref<string>) => {
     })
   })
 
+  const resizeContainer = () => {
+    const element = document.querySelector(
+      `.${containerClass}`
+    ) as HTMLElement | null
+    if (!element) {
+      return
+    }
+    element.style.width = `${NOTE_WIDTH * (stackedNotes.value.length + 1)}px`
+  }
+
+  onMounted(() => {
+    resizeContainer()
+  })
+
   onUnmounted(() => {
     unsubscribe()
   })
 
+  watch(stackedNotes, resizeContainer, {
+    immediate: true
+  })
+
   return {
     titles,
     readme,
diff --git a/src/hooks/useNoteOverlay.hook.ts b/src/hooks/useNoteOverlay.hook.ts
index 0456c49..82e69de 100644
--- a/src/hooks/useNoteOverlay.hook.ts
+++ b/src/hooks/useNoteOverlay.hook.ts
@@ -1,9 +1,9 @@
 import { computed, onMounted } from '@vue/runtime-core'
 
 import { useOverlay } from '@/hooks/useOverlay.hook'
+import { NOTE_WIDTH } from '@/constants/note-width'
 
 const BOOKMARK_WIDTH = 2
-const NOTE_WIDTH = 620
 
 export const useNoteOverlay = (className: string, index: number) => {
   const { x } = useOverlay()
diff --git a/src/hooks/useOverlay.hook.ts b/src/hooks/useOverlay.hook.ts
index af62c3e..1668051 100644
--- a/src/hooks/useOverlay.hook.ts
+++ b/src/hooks/useOverlay.hook.ts
@@ -1,15 +1,14 @@
-import { onMounted, ref } from 'vue'
+import { ref } from 'vue'
 
 import { useEventListener } from '@vueuse/core'
 
-export const useOverlay = () => {
+export const useOverlay = (listen = true) => {
   const x = ref(0)
+  const body = document.querySelector('body')
 
-  onMounted(() => {
-    const element = document.querySelector('body')
-
+  if (listen) {
     useEventListener(
-      element,
+      body,
       'scroll',
       (e) => {
         const target = e.target as HTMLElement
@@ -20,8 +19,16 @@ export const useOverlay = () => {
         capture: false
       }
     )
-  })
+  }
+
+  const scrollTo = (to: number) => {
+    body?.scroll({
+      left: to
+    })
+  }
+
   return {
-    x
+    x,
+    scrollTo
   }
 }
diff --git a/src/styles/app.scss b/src/styles/app.scss
index a104946..f57a13b 100644
--- a/src/styles/app.scss
+++ b/src/styles/app.scss
@@ -14,6 +14,7 @@ html {
 body {
   font-family: 'Courier Prime', monospace;
   height: 100vh;
+  scroll-behavior: smooth
 }
 
 @media screen and (min-width: 769px) {