From bd72ecd0e5069d72c48b79e1f87e98b9dfb6d3e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joaqu=C3=ADn=20S=C3=A1nchez?= <userquin@gmail.com>
Date: Sun, 1 Jan 2023 20:59:31 +0100
Subject: [PATCH] feat: image preview gestures (#668)

---
 components/modal/ModalMediaPreview.vue |  22 ++++-
 composables/gestures/index.ts          |  77 ++++++++++++++++++
 package.json                           |   2 +
 pnpm-lock.yaml                         | 106 +++++++++++++++++++++++++
 4 files changed, 206 insertions(+), 1 deletion(-)
 create mode 100644 composables/gestures/index.ts

diff --git a/components/modal/ModalMediaPreview.vue b/components/modal/ModalMediaPreview.vue
index 82041a6d..55b44fa7 100644
--- a/components/modal/ModalMediaPreview.vue
+++ b/components/modal/ModalMediaPreview.vue
@@ -1,10 +1,27 @@
 <script setup lang="ts">
+import { useImageGesture } from '~/composables/gestures'
+
 const emit = defineEmits(['close'])
 
+const img = ref()
+
 const current = computed(() => mediaPreviewList.value[mediaPreviewIndex.value])
 const hasNext = computed(() => mediaPreviewIndex.value < mediaPreviewList.value.length - 1)
 const hasPrev = computed(() => mediaPreviewIndex.value > 0)
 
+useImageGesture(img, {
+  hasNext,
+  hasPrev,
+  onNext() {
+    if (hasNext.value)
+      mediaPreviewIndex.value++
+  },
+  onPrev() {
+    if (hasPrev.value)
+      mediaPreviewIndex.value--
+  },
+})
+
 const keys = useMagicKeys()
 
 whenever(keys.arrowLeft, prev)
@@ -45,7 +62,10 @@ function onClick(e: MouseEvent) {
       <div i-ri:arrow-left-s-line text-white />
     </button>
     <img
-      :src="current.url || current.previewUrl" :alt="current.description || ''" max-h-full max-w-full ma
+      ref="img"
+      :src="current.url || current.previewUrl"
+      :alt="current.description || ''"
+      max-h-full max-w-full ma
     >
 
     <div absolute top-0 w-full flex justify-between>
diff --git a/composables/gestures/index.ts b/composables/gestures/index.ts
new file mode 100644
index 00000000..2b04ae5b
--- /dev/null
+++ b/composables/gestures/index.ts
@@ -0,0 +1,77 @@
+import type { PermissiveMotionProperties } from '@vueuse/motion'
+import type { Handlers } from '@vueuse/gesture'
+import { useMotionProperties, useSpring } from '@vueuse/motion'
+import { useGesture } from '@vueuse/gesture'
+import type { MaybeRef } from '@vueuse/core'
+
+export interface CarouselOptions {
+  hasNext: MaybeRef<boolean>
+  hasPrev: MaybeRef<boolean>
+  onPrev: () => void
+  onNext: () => void
+}
+
+export const useImageGesture = (
+  domTarget: MaybeRef<HTMLElement>,
+  carouselOptions?: CarouselOptions,
+) => {
+  const { motionProperties } = useMotionProperties(domTarget, {
+    cursor: 'grab',
+    scale: 1,
+    x: 0,
+    y: 0,
+  })
+
+  const { set } = useSpring(motionProperties as Partial<PermissiveMotionProperties>)
+
+  // @ts-expect-error we need to fix types: just suppress it for now
+  const handlers: Handlers = {
+    onPinch({ offset: [d] }) {
+      set({ scale: 1 + d / 200 })
+    },
+    onDragStart() {
+      set({ cursor: 'grabbing' })
+    },
+    onDrag({ movement: [x, y], pinching }) {
+      if (!pinching)
+        set({ x, y, cursor: 'grabbing' })
+    },
+    onDragEnd({ vxvy: [vx], pinching }) {
+      if (pinching)
+        return
+
+      set({ cursor: 'grab' })
+      if (carouselOptions) {
+        const isSwipe = Math.abs(vx) > 0.25
+        if (isSwipe) {
+          if (vx > 0 && unref(carouselOptions.hasPrev))
+            carouselOptions.onPrev()
+
+          else if (vx < 0 && unref(carouselOptions.hasNext))
+            carouselOptions.onNext()
+        }
+      }
+      set({ x: 0, y: 0 })
+    },
+    onMove({ movement: [x, y], dragging, pinching }) {
+      if (dragging && !pinching)
+        set({ x, y })
+    },
+    onWheel({ event, dragging, pinching }) {
+      if (!dragging && !pinching && event.altKey) {
+        event.preventDefault()
+        // @ts-expect-error why is ts complaining here (motionProperties.scale)?
+        set({ scale: motionProperties.scale + event.deltaY * 0.001 })
+      }
+    },
+    onDblclick() {
+      set({ scale: 1 })
+    },
+    onTouchstart(event) {
+      if (event.touches === 2)
+        set({ scale: 1 })
+    },
+  }
+
+  useGesture(handlers, { domTarget })
+}
diff --git a/package.json b/package.json
index 696cdb39..d56fdf9a 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,9 @@
     "@tiptap/suggestion": "2.0.0-beta.204",
     "@tiptap/vue-3": "2.0.0-beta.204",
     "@vueuse/core": "^9.9.0",
+    "@vueuse/gesture": "2.0.0-beta.1",
     "@vueuse/integrations": "^9.9.0",
+    "@vueuse/motion": "2.0.0-beta.12",
     "blurhash": "^2.0.4",
     "browser-fs-access": "^0.31.1",
     "floating-vue": "2.0.0-beta.20",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7275f5c0..d742a4b9 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -33,7 +33,9 @@ specifiers:
   '@vitejs/plugin-vue': ^3.2.0
   '@vue-macros/nuxt': ^0.2.2
   '@vueuse/core': ^9.9.0
+  '@vueuse/gesture': 2.0.0-beta.1
   '@vueuse/integrations': ^9.9.0
+  '@vueuse/motion': 2.0.0-beta.12
   '@vueuse/nuxt': ^9.9.0
   blurhash: ^2.0.4
   browser-fs-access: ^0.31.1
@@ -94,7 +96,9 @@ dependencies:
   '@tiptap/suggestion': 2.0.0-beta.204
   '@tiptap/vue-3': 2.0.0-beta.204
   '@vueuse/core': 9.9.0
+  '@vueuse/gesture': 2.0.0-beta.1
   '@vueuse/integrations': 9.9.0_ha7ivgav6uqpoo2b5thfugqwjq
+  '@vueuse/motion': 2.0.0-beta.12
   blurhash: 2.0.4
   browser-fs-access: 0.31.1
   floating-vue: 2.0.0-beta.20
@@ -2708,6 +2712,10 @@ packages:
     resolution: {integrity: sha512-PBjIUxZHOuj0R15/xuwJYjFi+KZdNFrehocChv4g5hu6aFroHue8m0lBP0POdK2nKzbw0cgV1mws8+V/JAcEkQ==}
     dev: true
 
+  /@types/web-bluetooth/0.0.14:
+    resolution: {integrity: sha512-5d2RhCard1nQUC3aHcq/gHzWYO6K0WJmAbjO7mQJgCQKtZpgXxv1rOM6O/dBDhDYYVutk1sciOgNSe+5YyfM8A==}
+    dev: false
+
   /@types/web-bluetooth/0.0.16:
     resolution: {integrity: sha512-oh8q2Zc32S6gd/j50GowEjKLoOVOwHP/bWVjKJInBwQqdOYMdPrf1oVlelTlyfFK3CKxL1uahMDAr+vy8T7yMQ==}
 
@@ -3498,6 +3506,23 @@ packages:
     resolution: {integrity: sha512-Ewzq5Yhimg7pSztDV+RH1UDKBzmtqieXQlpTVm2AwraoRL/Rks96mvd8Vgi7Lj+h+TH8dv7mXD3FRZR3TUvbSg==}
     dev: true
 
+  /@vueuse/core/8.9.4:
+    resolution: {integrity: sha512-B/Mdj9TK1peFyWaPof+Zf/mP9XuGAngaJZBwPaXBvU3aCTZlx3ltlrFFFyMV4iGBwsjSCeUCgZrtkEj9dS2Y3Q==}
+    peerDependencies:
+      '@vue/composition-api': ^1.1.0
+      vue: ^2.6.0 || ^3.2.0
+    peerDependenciesMeta:
+      '@vue/composition-api':
+        optional: true
+      vue:
+        optional: true
+    dependencies:
+      '@types/web-bluetooth': 0.0.14
+      '@vueuse/metadata': 8.9.4
+      '@vueuse/shared': 8.9.4
+      vue-demi: 0.13.11
+    dev: false
+
   /@vueuse/core/9.9.0:
     resolution: {integrity: sha512-JdDb7TrE0imZnwBhMF4+0PCJqGD3AxzH8S2sfk54P0rqvklK+EAtAR/mPb1HwV/JPujQFQJhghQ190Yq03YpVw==}
     dependencies:
@@ -3509,6 +3534,21 @@ packages:
       - '@vue/composition-api'
       - vue
 
+  /@vueuse/gesture/2.0.0-beta.1:
+    resolution: {integrity: sha512-HTLibLy3bh6TjRnDAbMAvHSsEmrkRituMj2x+mHwmp1EnM8A8CDRTfNJEr8d/hIairnPPp5Va2KWYVmyP/zvkA==}
+    peerDependencies:
+      '@vue/composition-api': ^1.4.1
+      vue: ^2.0.0 || >=3.0.0-rc.0
+    peerDependenciesMeta:
+      '@vue/composition-api':
+        optional: true
+    dependencies:
+      chokidar: 3.5.3
+      consola: 2.15.3
+      upath: 2.0.1
+      vue-demi: 0.13.11
+    dev: false
+
   /@vueuse/head/1.0.19_vue@3.2.45:
     resolution: {integrity: sha512-UB8Vij9fjLS+VIL8VnRxkkkX1dosQEgdfq7kyHNev5tMzAlUc1BwIRlSU5PtJv9+Zk46BhTNdh/Btp+dEinWFQ==}
     peerDependencies:
@@ -3570,9 +3610,30 @@ packages:
       - vue
     dev: false
 
+  /@vueuse/metadata/8.9.4:
+    resolution: {integrity: sha512-IwSfzH80bnJMzqhaapqJl9JRIiyQU0zsRGEgnxN6jhq7992cPUJIRfV+JHRIZXjYqbwt07E1gTEp0R0zPJ1aqw==}
+    dev: false
+
   /@vueuse/metadata/9.9.0:
     resolution: {integrity: sha512-pgxsUJv/d7IjKpLeB6TthggEsaBwM3ffc5jPrr5TmxAm/fup0mGR5VTzrdA/PSx85tpb+CIvP92D+55qBNc8ag==}
 
+  /@vueuse/motion/2.0.0-beta.12:
+    resolution: {integrity: sha512-cAZqXexLX6xo+H1N1Mv+wBSSqG4wB+BdjIuHQ50jwlelXCDxSi8gj0K/9nDS+aUZtWh6YMwS6UGCKg58jMVglA==}
+    peerDependencies:
+      '@vue/composition-api': ^1.4.1
+      vue: ^2.0.0 || >=3.0.0-rc.0
+    peerDependenciesMeta:
+      '@vue/composition-api':
+        optional: true
+    dependencies:
+      '@vueuse/core': 8.9.4
+      '@vueuse/shared': 8.9.4
+      framesync: 6.1.2
+      popmotion: 11.0.5
+      style-value-types: 5.1.2
+      vue-demi: 0.13.11
+    dev: false
+
   /@vueuse/nuxt/9.9.0_nuxt@3.0.0:
     resolution: {integrity: sha512-bhvHsy3vM38WWRhFgyjbDP/tfn0AMP7z1KeaWt5+ysxGHZ1EHMsY4lcFbpcFlQ6K9TKMcYvzzcBSzYxlWanMnQ==}
     peerDependencies:
@@ -3591,6 +3652,20 @@ packages:
       - vue
     dev: true
 
+  /@vueuse/shared/8.9.4:
+    resolution: {integrity: sha512-wt+T30c4K6dGRMVqPddexEVLa28YwxW5OFIPmzUHICjphfAuBFTTdDoyqREZNDOFJZ44ARH1WWQNCUK8koJ+Ag==}
+    peerDependencies:
+      '@vue/composition-api': ^1.1.0
+      vue: ^2.6.0 || ^3.2.0
+    peerDependenciesMeta:
+      '@vue/composition-api':
+        optional: true
+      vue:
+        optional: true
+    dependencies:
+      vue-demi: 0.13.11
+    dev: false
+
   /@vueuse/shared/9.9.0:
     resolution: {integrity: sha512-+D0XFwHG0T+uaIbCSlROBwm1wzs71B7n3KyDOxnvfEMMHDOzl09rYKwaE2AENmYwYPXfHPbSBRDD2gBVHbvTcg==}
     dependencies:
@@ -5763,6 +5838,12 @@ packages:
     resolution: {integrity: sha512-MhLuK+2gUcnZe8ZHlaaINnQLl0xRIGRfcGk2yl8xoQAfHrSsL3rYu6FCmBdkdbhc9EPlwyGHewaRsvwRMJtAlA==}
     dev: true
 
+  /framesync/6.1.2:
+    resolution: {integrity: sha512-jBTqhX6KaQVDyus8muwZbBeGGP0XgujBRbQ7gM7BRdS3CadCZIHiawyzYLnafYcvZIh5j8WE7cxZKFn7dXhu9g==}
+    dependencies:
+      tslib: 2.4.0
+    dev: false
+
   /fresh/0.5.2:
     resolution: {integrity: sha512-zJ2mQYM18rEFOudeV4GShTGIQ7RbzA7ozbU9I/XBpm7kqgMywgmylMwXHxZJmkVoYkna9d2pVXVXPdYTP9ej8Q==}
     engines: {node: '>= 0.6'}
@@ -6093,6 +6174,10 @@ packages:
       tslib: 2.4.1
     dev: false
 
+  /hey-listen/1.0.8:
+    resolution: {integrity: sha512-COpmrF2NOg4TBWUJ5UVyaCU2A88wEMkUPK4hNqyCkqHbxT92BbvfjoSozkAIIm6XhicGlJHhFdullInrdhwU8Q==}
+    dev: false
+
   /hookable/5.4.2:
     resolution: {integrity: sha512-6rOvaUiNKy9lET1X0ECnyZ5O5kSV0PJbtA5yZUgdEF7fGJEVwSLSislltyt7nFwVVALYHQJtfGeAR2Y0A0uJkg==}
     dev: true
@@ -7826,6 +7911,15 @@ packages:
     engines: {node: '>=4'}
     dev: true
 
+  /popmotion/11.0.5:
+    resolution: {integrity: sha512-la8gPM1WYeFznb/JqF4GiTkRRPZsfaj2+kCxqQgr2MJylMmIKUwBfWW8Wa5fml/8gmtlD5yI01MP1QCZPWmppA==}
+    dependencies:
+      framesync: 6.1.2
+      hey-listen: 1.0.8
+      style-value-types: 5.1.2
+      tslib: 2.4.0
+    dev: false
+
   /postcss-calc/8.2.4_postcss@8.4.19:
     resolution: {integrity: sha512-SmWMSJmB8MRnnULldx0lQIyhSNvuDl9HfrZkaqqE/WHAhToYsAvDq+yAsA/kIyINDszOp3Rh0GFoNuH5Ypsm3Q==}
     peerDependencies:
@@ -9032,6 +9126,13 @@ packages:
     dependencies:
       acorn: 8.8.1
 
+  /style-value-types/5.1.2:
+    resolution: {integrity: sha512-Vs9fNreYF9j6W2VvuDTP7kepALi7sk0xtk2Tu8Yxi9UoajJdEVpNpCov0HsLTqXvNGKX+Uv09pkozVITi1jf3Q==}
+    dependencies:
+      hey-listen: 1.0.8
+      tslib: 2.4.0
+    dev: false
+
   /stylehacks/5.1.1_postcss@8.4.19:
     resolution: {integrity: sha512-sBpcd5Hx7G6seo7b1LkpttvTz7ikD0LlH5RmdcBNb6fFR0Fl7LQwHDFr300q4cwUqi+IYrFGmsIHieMBfnN/Bw==}
     engines: {node: ^10 || ^12 || >=14.0}
@@ -9692,6 +9793,11 @@ packages:
     engines: {node: '>=4'}
     dev: true
 
+  /upath/2.0.1:
+    resolution: {integrity: sha512-1uEe95xksV1O0CYKXo8vQvN1JEbtJp7lb7C5U9HMsIp6IVwntkH/oNUzyVNQSd4S1sYk2FpSSW44FqMc8qee5w==}
+    engines: {node: '>=4'}
+    dev: false
+
   /update-browserslist-db/1.0.10_browserslist@4.21.4:
     resolution: {integrity: sha512-OztqDenkfFkbSG+tRxBeAnCVPckDBcvibKd35yDONx6OU8N7sqgwc7rCbkJ/WcYtVRZ4ba68d6byhC21GFh7sQ==}
     hasBin: true