Add next/prev chapter buttons for mobile devices

Also removes touch events as they interfere with continuous scrolling

src/plugins/bookPlayer/plugin.js

@@ -19,6 +19,8 @@ export class BookPlayer {
 
         this.onDialogClosed = this.onDialogClosed.bind(this);
         this.openTableOfContents = this.openTableOfContents.bind(this);
+        this.prevChapter = this.prevChapter.bind(this);
+        this.nextChapter = this.nextChapter.bind(this);
         this.onWindowKeyUp = this.onWindowKeyUp.bind(this);
     }
 
@@ -123,26 +125,6 @@ export class BookPlayer {
         }
     }
 
-    onTouchStart(e) {
-        // TODO: depending on the event this can be the document or the rendition itself
-        const rendition = this._rendition || this;
-        const book = rendition.book;
-
-        // check that the event is from the book or the document
-        if (!book || this._loaded === false) return;
-
-        // epubjs stores pages off the screen or something for preloading
-        // get the modulus of the touch event to account for the increased width
-        if (!e.touches || e.touches.length === 0) return;
-
-        const touch = e.touches[0].clientX % dom.getWindowSize().innerWidth;
-        if (touch < dom.getWindowSize().innerWidth / 2) {
-            book.package.metadata.direction === 'rtl' ? rendition.next() : rendition.prev();
-        } else {
-            book.package.metadata.direction === 'rtl' ? rendition.prev() : rendition.next();
-        }
-    }
-
     onDialogClosed() {
         this.stop();
     }
@@ -151,27 +133,33 @@ export class BookPlayer {
         const elem = this._mediaElement;
 
         elem.addEventListener('close', this.onDialogClosed, {once: true});
-        elem.querySelector('.btnBookplayerExit').addEventListener('click', this.onDialogClosed, {once: true});
+        elem.querySelector('#btnBookplayerExit').addEventListener('click', this.onDialogClosed, {once: true});
-        elem.querySelector('.btnBookplayerToc').addEventListener('click', this.openTableOfContents);
+        elem.querySelector('#btnBookplayerToc').addEventListener('click', this.openTableOfContents);
+        if (browser.mobile) {
+            elem.querySelector('#btnBookplayerPrev').addEventListener('click', this.prevChapter);
+            elem.querySelector('#btnBookplayerNext').addEventListener('click', this.nextChapter);
+        }
     }
 
     bindEvents() {
         this.bindMediaElementEvents();
 
         document.addEventListener('keyup', this.onWindowKeyUp);
-        document.addEventListener('touchstart', this.onTouchStart);
 
         // FIXME: I don't really get why document keyup event is not triggered when epub is in focus
         this._rendition.on('keyup', this.onWindowKeyUp);
-        this._rendition.on('touchstart', this.onTouchStart);
     }
 
     unbindMediaElementEvents() {
         const elem = this._mediaElement;
 
         elem.removeEventListener('close', this.onDialogClosed);
-        elem.querySelector('.btnBookplayerExit').removeEventListener('click', this.onDialogClosed);
+        elem.querySelector('#btnBookplayerExit').removeEventListener('click', this.onDialogClosed);
-        elem.querySelector('.btnBookplayerToc').removeEventListener('click', this.openTableOfContents);
+        elem.querySelector('#btnBookplayerToc').removeEventListener('click', this.openTableOfContents);
+        if (browser.mobile) {
+            elem.querySelector('#btnBookplayerPrev').removeEventListener('click', this.prevChapter);
+            elem.querySelector('#btnBookplayerNext').removeEventListener('click', this.nextChapter);
+        }
     }
 
     unbindEvents() {
@@ -180,11 +168,9 @@ export class BookPlayer {
         }
 
         document.removeEventListener('keyup', this.onWindowKeyUp);
-        document.removeEventListener('touchstart', this.onTouchStart);
 
         if (this._rendition) {
             this._rendition.off('keyup', this.onWindowKeyUp);
-            this._rendition.off('touchstart', this.onTouchStart);
         }
     }
 
@@ -194,6 +180,16 @@ export class BookPlayer {
         }
     }
 
+    prevChapter(e) {
+        this._rendition.prev();
+        e.preventDefault();
+    }
+
+    nextChapter(e) {
+        this._rendition.next();
+        e.preventDefault();
+    }
+
     createMediaElement() {
         let elem = this._mediaElement;
         if (elem) {
@@ -214,13 +210,22 @@ export class BookPlayer {
             elem.id = 'bookPlayer';
 
             let html = '';
-            html += '<div class="topRightActionButtons">';
+
-            html += '<button is="paper-icon-button-light" class="autoSize bookplayerButton btnBookplayerExit hide-mouse-idle-tv" tabindex="-1"><i class="material-icons bookplayerButtonIcon close"></i></button>';
+            if (browser.mobile) {
+                html += '<div class="button-wrapper top-button"><button id="btnBookplayerPrev" is="paper-icon-button-light" class="autoSize bookplayerButton hide-mouse-idle-tv"><i class="material-icons bookplayerButtonIcon navigate_before"></i> Prev</button></div>';
+            }
+
+            html += '<div id="viewer">';
+            html += '<div class="topButtons">';
+            html += '<button is="paper-icon-button-light" id="btnBookplayerToc" class="autoSize bookplayerButton hide-mouse-idle-tv" tabindex="-1"><i class="material-icons bookplayerButtonIcon toc"></i></button>';
+            html += '<button is="paper-icon-button-light" id="btnBookplayerExit" class="autoSize bookplayerButton hide-mouse-idle-tv" tabindex="-1"><i class="material-icons bookplayerButtonIcon close"></i></button>';
             html += '</div>';
-            html += '<div class="topLeftActionButtons">';
-            html += '<button is="paper-icon-button-light" class="autoSize bookplayerButton btnBookplayerToc hide-mouse-idle-tv" tabindex="-1"><i class="material-icons bookplayerButtonIcon toc"></i></button>';
             html += '</div>';
 
+            if (browser.mobile) {
+                html += '<div class="button-wrapper bottom-button"><button id="btnBookplayerNext" is="paper-icon-button-light" class="autoSize bookplayerButton hide-mouse-idle-tv">Next <i class="material-icons bookplayerButtonIcon navigate_next"></i></button></div>';
+            }
+
             elem.innerHTML = html;
 
             dialogHelper.open(elem);
@@ -236,9 +241,7 @@ export class BookPlayer {
             return book.renderTo(elem, {
                 width: '100%',
                 height: '100%',
-                manager: 'continuous',
+                flow: 'scrolled-doc'
-                flow: 'scrolled-doc',
-                offset: 0
             });
         } else {
             return book.renderTo(elem, {
@@ -266,7 +269,7 @@ export class BookPlayer {
             import('epubjs').then(({default: epubjs}) => {
                 const downloadHref = apiClient.getItemDownloadUrl(item.Id);
                 const book = epubjs(downloadHref, {openAs: 'epub'});
-                const rendition = this.render(elem, book);
+                const rendition = this.render('viewer', book);
 
                 this._currentSrc = downloadHref;
                 this._rendition = rendition;

src/plugins/bookPlayer/style.css

@@ -7,18 +7,20 @@
     background: #fff;
 }
 
-.topRightActionButtons {
+.topButtons {
-    right: 0.5vh;
     top: 0.5vh;
     z-index: 1002;
-    position: absolute;
+    position: sticky;
 }
 
-.topLeftActionButtons {
+#btnBookplayerToc {
-    left: 0.5vh;
+    float: left;
-    top: 0.5vh;
+    margin-left: 2vw;
-    z-index: 1002;
+}
-    position: absolute;
+
+#btnBookplayerExit {
+    float: right;
+    margin-right: 2vw;
 }
 
 .bookplayerButtonIcon {
@@ -37,3 +39,31 @@
 .bookplayerErrorMsg {
     text-align: center;
 }
+
+#viewer {
+    align-items: flex-start;
+}
+
+#btnBookplayerPrev {
+    margin: 0.5vh 0.5vh;
+    color: black;
+}
+
+#btnBookplayerNext {
+    margin: 0.5vh 0.5vh;
+    color: black;
+}
+
+.button-wrapper {
+    text-align: center;
+    position: relative;
+    height: 0;
+}
+
+.top-button {
+    margin: 0.5vh 2em;
+}
+
+.bottom-button {
+    margin: 2em 0.5vh;
+}