From 0a63208da76f96820654ee7238366887feccd5a3 Mon Sep 17 00:00:00 2001
From: Tusooa Zhu <tusooa@kazv.moe>
Date: Mon, 2 Aug 2021 17:42:10 -0400
Subject: [PATCH] Use pinch-zoom-element for pinch zoom functionality

---
 package.json                               |  1 +
 src/components/media_modal/media_modal.js  |  9 ++-
 src/components/media_modal/media_modal.vue | 64 +++++++++++++++++-----
 src/components/pinch_zoom/pinch_zoom.js    |  6 ++
 src/components/pinch_zoom/pinch_zoom.vue   | 11 ++++
 src/main.js                                |  2 +
 yarn.lock                                  | 11 ++++
 7 files changed, 89 insertions(+), 15 deletions(-)
 create mode 100644 src/components/pinch_zoom/pinch_zoom.js
 create mode 100644 src/components/pinch_zoom/pinch_zoom.vue

diff --git a/package.json b/package.json
index 99301266..d4d52023 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "@fortawesome/free-regular-svg-icons": "^5.15.1",
     "@fortawesome/free-solid-svg-icons": "^5.15.1",
     "@fortawesome/vue-fontawesome": "^2.0.0",
+    "@kazvmoe-infra/pinch-zoom-element": "https://lily.kazv.moe/infra/pinch-zoom-element.git",
     "body-scroll-lock": "^2.6.4",
     "chromatism": "^3.0.0",
     "cropperjs": "^1.4.3",
diff --git a/src/components/media_modal/media_modal.js b/src/components/media_modal/media_modal.js
index c53eeccd..ca271f32 100644
--- a/src/components/media_modal/media_modal.js
+++ b/src/components/media_modal/media_modal.js
@@ -1,9 +1,9 @@
 import StillImage from '../still-image/still-image.vue'
 import VideoAttachment from '../video_attachment/video_attachment.vue'
 import Modal from '../modal/modal.vue'
+import PinchZoom from '../pinch_zoom/pinch_zoom.vue'
 import fileTypeService from '../../services/file_type/file_type.service.js'
 import GestureService from '../../services/gesture_service/gesture_service'
-import Vuex from 'vuex'
 import { library } from '@fortawesome/fontawesome-svg-core'
 import {
   faChevronLeft,
@@ -23,6 +23,7 @@ const MediaModal = {
   components: {
     StillImage,
     VideoAttachment,
+    PinchZoom,
     Modal
   },
   computed: {
@@ -54,6 +55,12 @@ const MediaModal = {
       return `translate(${this.offsets[0]}px, ${this.offsets[1]}px) scale(${this.scaling}, ${this.scaling})`
     }
   },
+  data () {
+    return {
+      pinchZoomOptions: {
+      }
+    }
+  },
   created () {
     this.mediaGesture = new GestureService.SwipeAndScaleGesture({
       direction: GestureService.DIRECTION_LEFT,
diff --git a/src/components/media_modal/media_modal.vue b/src/components/media_modal/media_modal.vue
index c115fa63..48087534 100644
--- a/src/components/media_modal/media_modal.vue
+++ b/src/components/media_modal/media_modal.vue
@@ -4,18 +4,27 @@
     class="media-modal-view"
     @backdropClicked="hide"
   >
-    <img
-      v-if="type === 'image'"
-      class="modal-image"
-      :src="currentMedia.url"
-      :alt="currentMedia.description"
-      :title="currentMedia.description"
-      :style="{ transform }"
-      @touchstart.stop.prevent="mediaTouchStart"
-      @touchmove.stop.prevent="mediaTouchMove"
-      @touchend.stop.prevent="mediaTouchEnd"
-      @click="hide"
-    >
+    <div class="modal-image-container">
+      <PinchZoom
+        options="pinchZoomOptions"
+        class="modal-image-container-inner"
+        selector=".modal-image"
+        allow-pan-min-scale="1"
+        min-scale="1"
+        reset-to-min-scale-limit="1.2"
+        reach-min-scale-strategy="reset"
+        stop-propagate-handled="stop-propgate-handled"
+        :inner-class="'modal-image-container-inner'"
+      >
+        <img
+          v-if="type === 'image'"
+          class="modal-image"
+          :src="currentMedia.url"
+          :alt="currentMedia.description"
+          :title="currentMedia.description"
+        >
+      </PinchZoom>
+    </div>
     <VideoAttachment
       v-if="type === 'video'"
       class="modal-image"
@@ -73,6 +82,7 @@
       opacity: 1;
     }
   }
+  overflow: hidden;
 }
 
 @keyframes media-fadein {
@@ -84,14 +94,40 @@
   }
 }
 
-.modal-image {
+.modal-image-container {
+  display: flex;
+  overflow: hidden;
+  align-items: center;
+  flex-direction: column;
   max-width: 90%;
-  max-height: 90%;
+  max-height: 95%;
+  flex-grow: 1;
+
+  &-inner {
+    width: 100%;
+    height: 100%;
+    flex-grow: 1;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+  }
+}
+
+.modal-image {
+  max-width: 100%;
+  max-height: 100%;
+  min-width: 0;
+  min-height: 0;
   box-shadow: 0px 5px 15px 0 rgba(0, 0, 0, 0.5);
   image-orientation: from-image; // NOTE: only FF supports this
   animation: 0.1s cubic-bezier(0.7, 0, 1, 0.6) media-fadein;
 }
 
+//.modal-image {
+//  height: 90vh;
+//  width: 100%;
+//}
+
 .modal-view-button-arrow {
   position: absolute;
   display: block;
diff --git a/src/components/pinch_zoom/pinch_zoom.js b/src/components/pinch_zoom/pinch_zoom.js
new file mode 100644
index 00000000..75bb6082
--- /dev/null
+++ b/src/components/pinch_zoom/pinch_zoom.js
@@ -0,0 +1,6 @@
+import PinchZoom from '@kazvmoe-infra/pinch-zoom-element'
+
+export default {
+  props: {
+  }
+}
diff --git a/src/components/pinch_zoom/pinch_zoom.vue b/src/components/pinch_zoom/pinch_zoom.vue
new file mode 100644
index 00000000..18d69719
--- /dev/null
+++ b/src/components/pinch_zoom/pinch_zoom.vue
@@ -0,0 +1,11 @@
+<template>
+  <pinch-zoom
+    class="pinch-zoom-parent"
+    v-bind="$attrs"
+    v-on="$listeners"
+  >
+    <slot />
+  </pinch-zoom>
+</template>
+
+<script src="./pinch_zoom.js"></script>
diff --git a/src/main.js b/src/main.js
index 3895da89..03493525 100644
--- a/src/main.js
+++ b/src/main.js
@@ -45,6 +45,8 @@ Vue.use(VueClickOutside)
 Vue.use(PortalVue)
 Vue.use(VBodyScrollLock)
 
+Vue.config.ignoredElements = ['pinch-zoom']
+
 Vue.component('FAIcon', FontAwesomeIcon)
 Vue.component('FALayers', FontAwesomeLayers)
 
diff --git a/yarn.lock b/yarn.lock
index 23cc895b..cecac65f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -915,6 +915,12 @@
   resolved "https://registry.yarnpkg.com/@fortawesome/vue-fontawesome/-/vue-fontawesome-2.0.0.tgz#63da3e459147cebb0a8d58eed81d6071db9f5973"
   integrity sha512-N3VKw7KzRfOm8hShUVldpinlm13HpvLBQgT63QS+aCrIRLwjoEUXY5Rcmttbfb6HkzZaeqjLqd/aZCQ53UjQpg==
 
+"@kazvmoe-infra/pinch-zoom-element@https://lily.kazv.moe/infra/pinch-zoom-element.git":
+  version "1.1.1"
+  resolved "https://lily.kazv.moe/infra/pinch-zoom-element.git#de150c01057f0de0c3ef669917399fe370e36f40"
+  dependencies:
+    pointer-tracker "^2.0.3"
+
 "@nodelib/fs.scandir@2.1.3":
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz#3a582bdb53804c6ba6d146579c46e52130cf4a3b"
@@ -6941,6 +6947,11 @@ pngjs@^3.3.0:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/pngjs/-/pngjs-3.3.3.tgz#85173703bde3edac8998757b96e5821d0966a21b"
 
+pointer-tracker@^2.0.3:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/pointer-tracker/-/pointer-tracker-2.4.0.tgz#78721c2d2201486db11ec1094377f03023b621b3"
+  integrity sha512-pWI2tpaM/XNtc9mUTv42Rmjf6mkHvE8LT5DDEq0G7baPNhxNM9E3CepubPplSoSLk9E5bwQrAMyDcPVmJyTW4g==
+
 portal-vue@^2.1.4:
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/portal-vue/-/portal-vue-2.1.4.tgz#1fc679d77e294dc8d026f1eb84aa467de11b392e"