From d2e084449376707ea0ab746ec1657a11238546fa Mon Sep 17 00:00:00 2001
From: advplyr <advplyr@protonmail.com>
Date: Sun, 26 Mar 2023 14:44:59 -0500
Subject: [PATCH] Epub reader updates for mobile

---
 client/components/readers/EpubReader.vue | 42 +++++++++++++++++++++---
 client/components/readers/Reader.vue     | 12 +++++--
 2 files changed, 46 insertions(+), 8 deletions(-)

diff --git a/client/components/readers/EpubReader.vue b/client/components/readers/EpubReader.vue
index 351850e2..20b8f203 100644
--- a/client/components/readers/EpubReader.vue
+++ b/client/components/readers/EpubReader.vue
@@ -1,13 +1,13 @@
 <template>
   <div class="h-full w-full">
-    <div class="h-full flex items-center">
-      <div style="width: 100px; max-width: 100px" class="h-full flex items-center overflow-x-hidden justify-center">
+    <div class="h-full flex items-center justify-center">
+      <div style="width: 100px; max-width: 100px" class="h-full hidden sm:flex items-center overflow-x-hidden justify-center">
         <span v-if="hasPrev" class="material-icons text-white text-opacity-50 hover:text-opacity-80 cursor-pointer text-6xl" @mousedown.prevent @click="prev">chevron_left</span>
       </div>
       <div id="frame" class="w-full" style="height: 80%">
         <div id="viewer"></div>
       </div>
-      <div style="width: 100px; max-width: 100px" class="h-full flex items-center justify-center overflow-x-hidden">
+      <div style="width: 100px; max-width: 100px" class="h-full hidden sm:flex items-center justify-center overflow-x-hidden">
         <span v-if="hasNext" class="material-icons text-white text-opacity-50 hover:text-opacity-80 cursor-pointer text-6xl" @mousedown.prevent @click="next">chevron_right</span>
       </div>
     </div>
@@ -32,6 +32,7 @@ export default {
   },
   data() {
     return {
+      windowWidth: 0,
       /** @type {ePub.Book} */
       book: null,
       /** @type {ePub.Rendition} */
@@ -59,6 +60,10 @@ export default {
     },
     localStorageLocationsKey() {
       return `ebookLocations-${this.libraryItemId}`
+    },
+    readerWidth() {
+      if (this.windowWidth < 640) return this.windowWidth
+      return this.windowWidth - 200
     }
   },
   methods: {
@@ -197,13 +202,13 @@ export default {
 
       /** @type {ePub.Book} */
       reader.book = new ePub(reader.url, {
-        width: window.innerWidth - 200,
+        width: this.readerWidth,
         height: window.innerHeight - 50
       })
 
       /** @type {ePub.Rendition} */
       reader.rendition = reader.book.renderTo('viewer', {
-        width: window.innerWidth - 200,
+        width: this.readerWidth,
         height: window.innerHeight * 0.8
       })
 
@@ -218,6 +223,23 @@ export default {
         reader.rendition.on('relocated', reader.relocated)
         reader.rendition.on('keydown', reader.keyUp)
 
+        let touchStart = 0
+        let touchEnd = 0
+        reader.rendition.on('touchstart', (event) => {
+          touchStart = event.changedTouches[0].screenX
+        })
+
+        reader.rendition.on('touchend', (event) => {
+          touchEnd = event.changedTouches[0].screenX
+          const touchDistanceX = Math.abs(touchEnd - touchStart)
+          if (touchStart < touchEnd && touchDistanceX > 120) {
+            this.next()
+          }
+          if (touchStart > touchEnd && touchDistanceX > 120) {
+            this.prev()
+          }
+        })
+
         // load ebook cfi locations
         const savedLocations = this.loadLocations()
         if (savedLocations) {
@@ -228,9 +250,19 @@ export default {
           })
         }
       })
+    },
+    resize() {
+      this.windowWidth = window.innerWidth
+      this.rendition?.resize(this.readerWidth, window.innerHeight * 0.8)
     }
   },
+  beforeDestroy() {
+    window.removeEventListener('resize', this.resize)
+    this.book?.destroy()
+  },
   mounted() {
+    this.windowWidth = window.innerWidth
+    window.addEventListener('resize', this.resize)
     this.initEpub()
   }
 }
diff --git a/client/components/readers/Reader.vue b/client/components/readers/Reader.vue
index a7383fb7..e99cfe30 100644
--- a/client/components/readers/Reader.vue
+++ b/client/components/readers/Reader.vue
@@ -5,7 +5,7 @@
     </div>
 
     <div class="absolute top-4 left-1/2 transform -translate-x-1/2">
-      <h1 class="text-2xl mb-1" style="line-height: 1.15; font-weight: 100">
+      <h1 class="text-lg sm:text-xl md:text-2xl mb-1" style="line-height: 1.15; font-weight: 100">
         <span style="font-weight: 600">{{ abTitle }}</span>
         <span v-if="abAuthor" style="display: inline"> – </span>
         <span v-if="abAuthor">{{ abAuthor }}</span>
@@ -150,13 +150,19 @@ export default {
       if (!this.$refs.readerComponent) return
 
       if (action === this.$hotkeys.EReader.NEXT_PAGE) {
-        if (this.$refs.readerComponent.next) this.$refs.readerComponent.next()
+        this.next()
       } else if (action === this.$hotkeys.EReader.PREV_PAGE) {
-        if (this.$refs.readerComponent.prev) this.$refs.readerComponent.prev()
+        this.prev()
       } else if (action === this.$hotkeys.EReader.CLOSE) {
         this.close()
       }
     },
+    next() {
+      if (this.$refs.readerComponent?.next) this.$refs.readerComponent.next()
+    },
+    prev() {
+      if (this.$refs.readerComponent?.prev) this.$refs.readerComponent.prev()
+    },
     registerListeners() {
       this.$eventBus.$on('reader-hotkey', this.hotkey)
     },