increase version to v1.4.5

pairdrop-cli: add fallback if navigator.clipboard.readText() is not available

README.md

@@ -6,7 +6,7 @@
   <h1>PairDrop</h1>
 
   <p>
-    Local file sharing in your browser. Inspired by Apple's Airdrop.
+    Local file sharing in your browser. Inspired by Apple's AirDrop.
     <br />
     <a href="https://pairdrop.net"><strong>Explore  »</strong></a>
     <br />

docs/faq.md

@@ -58,8 +58,11 @@ If your devices are paired and behind a NAT, the public TURN Server from [Open R
 Yes. Your files are sent using WebRTC, which encrypts them on transit. To ensure the connection is secure and there is no MITM, compare the security number shown under the device name on both devices. The security number is different for every connection.
 
 ### Transferring many files with paired devices takes too long
-Naturally, if traffic needs to be routed through the turn server transfer speed decreases.
-As a workaround you can open a hotspot on one of your devices to bridge the connection which makes transfers much faster.
+Naturally, if traffic needs to be routed through the turn server because your devices are behind different NATs, transfer speed decreases.
+
+As the public TURN server used is not super fast, you can easily [specify to use your own TURN server](https://github.com/schlagmichdoch/PairDrop/blob/master/docs/host-your-own.md#specify-stunturn-servers) if you host your own instance.
+
+Alternatively, you can open a hotspot on one of your devices to bridge the connection which makes transfers much faster as no TURN server is needed.
 
 - [How to open a hotspot on Windows](https://support.microsoft.com/en-us/windows/use-your-windows-pc-as-a-mobile-hotspot-c89b0fad-72d5-41e8-f7ea-406ad9036b85#WindowsVersion=Windows_11)
 - [How to open a hotspot on Mac](https://support.apple.com/guide/mac-help/share-internet-connection-mac-network-users-mchlp1540/mac)

index.js

@@ -368,6 +368,10 @@ class PairDropServer {
         // delete the peer
         delete this._rooms[room][peer.id];
 
+        if (roomType === 'ip') {
+            peer.socket.terminate();
+        }
+
         //if room is empty, delete the room
         if (!Object.keys(this._rooms[room]).length) {
             delete this._rooms[room];

package-lock.json

@@ -1,17 +1,17 @@
 {
   "name": "pairdrop",
-  "version": "1.4.0",
+  "version": "1.4.5",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "pairdrop",
-      "version": "1.4.0",
+      "version": "1.4.5",
       "license": "ISC",
       "dependencies": {
         "express": "^4.18.2",
         "express-rate-limit": "^6.7.0",
-        "ua-parser-js": "^1.0.33",
+        "ua-parser-js": "^1.0.34",
         "unique-names-generator": "^4.3.0",
         "ws": "^8.12.1"
       },
@@ -583,9 +583,9 @@
       }
     },
     "node_modules/ua-parser-js": {
-      "version": "1.0.33",
-      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-1.0.33.tgz",
-      "integrity": "sha512-RqshF7TPTE0XLYAqmjlu5cLLuGdKrNu9O1KLA/qp39QtbZwuzwv1dT46DZSopoUMsYgXpB3Cv8a03FI8b74oFQ==",
+      "version": "1.0.34",
+      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-1.0.34.tgz",
+      "integrity": "sha512-K9mwJm/DaB6mRLZfw6q8IMXipcrmuT6yfhYmwhAkuh+81sChuYstYA+znlgaflUPaYUa3odxKPKGw6Vw/lANew==",
       "funding": [
         {
           "type": "opencollective",
@@ -1070,9 +1070,9 @@
       }
     },
     "ua-parser-js": {
-      "version": "1.0.33",
-      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-1.0.33.tgz",
-      "integrity": "sha512-RqshF7TPTE0XLYAqmjlu5cLLuGdKrNu9O1KLA/qp39QtbZwuzwv1dT46DZSopoUMsYgXpB3Cv8a03FI8b74oFQ=="
+      "version": "1.0.34",
+      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-1.0.34.tgz",
+      "integrity": "sha512-K9mwJm/DaB6mRLZfw6q8IMXipcrmuT6yfhYmwhAkuh+81sChuYstYA+znlgaflUPaYUa3odxKPKGw6Vw/lANew=="
     },
     "unique-names-generator": {
       "version": "4.7.1",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pairdrop",
-  "version": "1.4.0",
+  "version": "1.4.5",
   "description": "",
   "main": "index.js",
   "scripts": {
@@ -12,7 +12,7 @@
   "dependencies": {
     "express": "^4.18.2",
     "express-rate-limit": "^6.7.0",
-    "ua-parser-js": "^1.0.33",
+    "ua-parser-js": "^1.0.34",
     "unique-names-generator": "^4.3.0",
     "ws": "^8.12.1"
   },

public/index.html

@@ -122,7 +122,7 @@
                     <div class="font-subheading center text-center">Enter key from another device to continue.</div>
                     <div class="center row-reverse">
                         <button class="button" type="submit" disabled>Pair</button>
-                        <button class="button" close>Cancel</button>
+                        <button class="button" type="button" close>Cancel</button>
                     </div>
                 </x-paper>
             </x-background>
@@ -137,7 +137,7 @@
                     <div class="font-subheading center text-center">Are you sure to unpair all devices?</div>
                     <div class="center row-reverse">
                         <button class="button" type="submit">Unpair Devices</button>
-                        <button class="button" close>Cancel</button>
+                        <button class="button" type="button" close>Cancel</button>
                     </div>
                 </x-paper>
             </x-background>
@@ -209,7 +209,7 @@
                     <div id="text-input" class="textarea" role="textbox" autocapitalize="none" spellcheck="false" autofocus contenteditable></div>
                     <div class="center row-reverse">
                         <button class="button" type="submit" title="STR + ENTER" disabled close>Send</button>
-                        <button class="button" title="ESCAPE" close>Cancel</button>
+                        <button class="button" type="button" title="ESCAPE" close>Cancel</button>
                     </div>
                 </x-paper>
             </x-background>
@@ -238,6 +238,7 @@
         <x-background class="full center">
             <x-paper shadow="2">
                 <button class="button center" id="base64-paste-btn" title="Paste">Tap here to paste files</button>
+                <div class="textarea" placeholder="Paste here to send files" title="CMD/⌘ + V" contenteditable hidden></div>
                 <button class="button center" close>Close</button>
             </x-paper>
         </x-background>

public/scripts/network.js

@@ -8,7 +8,6 @@ class ServerConnection {
     constructor() {
         this._connect();
         Events.on('pagehide', _ => this._disconnect());
-        Events.on('beforeunload', _ => this._onBeforeUnload());
         document.addEventListener('visibilitychange', _ => this._onVisibilityChange());
         if (navigator.connection) navigator.connection.addEventListener('change', _ => this._reconnect());
         Events.on('room-secrets', e => this._sendRoomSecrets(e.detail));
@@ -137,7 +136,8 @@ class ServerConnection {
         return ws_url.toString();
     }
 
-    _onBeforeUnload() {
+    _disconnect() {
+        this.send({ type: 'disconnect' });
         if (this._socket) {
             this._socket.onclose = null;
             this._socket.close();
@@ -147,10 +147,6 @@ class ServerConnection {
         }
     }
 
-    _disconnect() {
-        this.send({ type: 'disconnect' });
-    }
-
     _onDisconnect() {
         console.log('WS: server disconnected');
         Events.fire('notify-user', 'Connecting..');
@@ -198,6 +194,10 @@ class Peer {
         this._send(JSON.stringify(message));
     }
 
+    sendDisplayName(displayName) {
+        this.sendJSON({type: 'display-name-changed', displayName: displayName});
+    }
+
     async createHeader(file) {
         return {
             name: file.name,
@@ -494,7 +494,8 @@ class Peer {
     }
 
     _onDisplayNameChanged(message) {
-        if (!message.displayName) return;
+        if (!message.displayName || this._displayName === message.displayName) return;
+        this._displayName = message.displayName;
         Events.fire('peer-display-name-changed', {peerId: this._peerId, displayName: message.displayName});
     }
 }
@@ -523,6 +524,7 @@ class RTCPeer extends Peer {
         this._peerId = peerId;
         this._conn = new RTCPeerConnection(window.rtcConfig);
         this._conn.onicecandidate = e => this._onIceCandidate(e);
+        this._conn.onicecandidateerror = e => this._onError(e);
         this._conn.onconnectionstatechange = _ => this._onConnectionStateChange();
         this._conn.oniceconnectionstatechange = e => this._onIceConnectionStateChange(e);
     }
@@ -573,7 +575,7 @@ class RTCPeer extends Peer {
         const channel = event.channel || event.target;
         channel.binaryType = 'arraybuffer';
         channel.onmessage = e => this._onMessage(e.data);
-        channel.onclose = e => this._onChannelClosed(e);
+        channel.onclose = _ => this._onChannelClosed();
         this._channel = channel;
         Events.on('beforeunload', e => this._onBeforeUnload(e));
         Events.on('pagehide', _ => this._onPageHide());
@@ -617,8 +619,6 @@ class RTCPeer extends Peer {
         if (this._busy) {
             e.preventDefault();
             return "There are unfinished transfers. Are you sure you want to close?";
-        } else {
-            this._disconnect();
         }
     }
 
@@ -695,6 +695,11 @@ class RTCPeer extends Peer {
     _isConnecting() {
         return this._channel && this._channel.readyState === 'connecting';
     }
+
+    sendDisplayName(displayName) {
+        if (!this._isConnected()) return;
+        super.sendDisplayName(displayName);
+    }
 }
 
 class PeersManager {
@@ -713,6 +718,7 @@ class PeersManager {
         Events.on('secret-room-deleted', e => this._onSecretRoomDeleted(e.detail));
         Events.on('display-name', e => this._onDisplayName(e.detail.message.displayName));
         Events.on('self-display-name-changed', e => this._notifyPeersDisplayNameChanged(e.detail));
+        Events.on('peer-display-name-changed', e => this._notifyPeerDisplayNameChanged(e.detail.peerId));
     }
 
     _onMessage(message) {
@@ -798,8 +804,8 @@ class PeersManager {
 
     _notifyPeerDisplayNameChanged(peerId) {
         const peer = this.peers[peerId];
-        if (!peer || (peer._conn && (peer._conn.signalingState !== "stable" || !peer._channel || peer._channel.readyState !== "open"))) return;
-        this.peers[peerId].sendJSON({type: 'display-name-changed', displayName: this._displayName});
+        if (!peer) return;
+        this.peers[peerId].sendDisplayName(this._displayName);
     }
 
     _onDisplayName(displayName) {
@@ -893,11 +899,11 @@ class Events {
         window.dispatchEvent(new CustomEvent(type, { detail: detail }));
     }
 
-    static on(type, callback) {
-        return window.addEventListener(type, callback, false);
+    static on(type, callback, options = false) {
+        return window.addEventListener(type, callback, options);
     }
 
-    static off(type, callback) {
-        return window.removeEventListener(type, callback, false);
+    static off(type, callback, options = false) {
+        return window.removeEventListener(type, callback, options);
     }
 }

public/scripts/ui.js

@@ -241,7 +241,7 @@ class PeersUI {
 
             const _callback = (e) => this._sendClipboardData(e, files, text);
             Events.on('paste-pointerdown', _callback);
-            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback));
+            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback), { once: true });
 
             this.$cancelPasteModeBtn.removeAttribute('hidden');
 
@@ -300,7 +300,8 @@ class PeerUI {
 
     constructor(peer, connectionHash) {
         this._peer = peer;
-        this._connectionHash = connectionHash;
+        this._connectionHash =
+            `${connectionHash.substring(0, 4)} ${connectionHash.substring(4, 8)} ${connectionHash.substring(8, 12)} ${connectionHash.substring(12, 16)}`;
         this._initDom();
         this._bindListeners();
 
@@ -345,8 +346,7 @@ class PeerUI {
         this.$el.querySelector('svg use').setAttribute('xlink:href', this._icon());
         this.$el.querySelector('.name').textContent = this._displayName();
         this.$el.querySelector('.device-name').textContent = this._deviceName();
-        this.$el.querySelector('.connection-hash').textContent =
-            this._connectionHash.substring(0, 4) + " " + this._connectionHash.substring(4, 8) + " " + this._connectionHash.substring(8, 12) + " " + this._connectionHash.substring(12, 16);
+        this.$el.querySelector('.connection-hash').textContent = this._connectionHash;
     }
 
     _initDom() {
@@ -569,7 +569,7 @@ class ReceiveDialog extends Dialog {
         }
     }
 
-    _parseFileData(displayName, files, imagesOnly, totalSize) {
+    _parseFileData(displayName, connectionHash, files, imagesOnly, totalSize) {
         if (files.length > 1) {
             let fileOtherText = ` and ${files.length - 1} other `;
             if (files.length === 2) {
@@ -586,6 +586,7 @@ class ReceiveDialog extends Dialog {
         this.$fileStem.innerText = fileName.substring(0, fileName.length - fileExtension.length);
         this.$fileExtension.innerText = fileExtension;
         this.$displayName.innerText = displayName;
+        this.$displayName.title = connectionHash;
         this.$fileSize.innerText = this._formatFileSize(totalSize);
     }
 }
@@ -603,8 +604,9 @@ class ReceiveFileDialog extends ReceiveDialog {
     }
 
     _onFilesReceived(sender, files, imagesOnly, totalSize) {
-        const displayName = $(sender).ui._displayName()
-        this._filesQueue.push({peer: sender, displayName: displayName, files: files, imagesOnly: imagesOnly, totalSize: totalSize});
+        const displayName = $(sender).ui._displayName();
+        const connectionHash = $(sender).ui._connectionHash;
+        this._filesQueue.push({peer: sender, displayName: displayName, connectionHash: connectionHash, files: files, imagesOnly: imagesOnly, totalSize: totalSize});
         this._nextFiles();
         window.blop.play();
     }
@@ -612,12 +614,11 @@ class ReceiveFileDialog extends ReceiveDialog {
     _nextFiles() {
         if (this._busy) return;
         this._busy = true;
-        const {peer, displayName, files, imagesOnly, totalSize} = this._filesQueue.shift();
-        this._displayFiles(peer, displayName, files, imagesOnly, totalSize);
+        const {peer, displayName, connectionHash, files, imagesOnly, totalSize} = this._filesQueue.shift();
+        this._displayFiles(peer, displayName, connectionHash, files, imagesOnly, totalSize);
     }
 
     _dequeueFile() {
-        // Todo: change count in document.title and move '- PairDrop' to back
         if (!this._filesQueue.length) { // nothing to do
             this._busy = false;
             return;
@@ -631,32 +632,40 @@ class ReceiveFileDialog extends ReceiveDialog {
 
     createPreviewElement(file) {
         return new Promise((resolve, reject) => {
-            let mime = file.type.split('/')[0]
-            let previewElement = {
-                image: 'img',
-                audio: 'audio',
-                video: 'video'
-            }
+            try {
+                let mime = file.type.split('/')[0]
+                let previewElement = {
+                    image: 'img',
+                    audio: 'audio',
+                    video: 'video'
+                }
 
-            if (Object.keys(previewElement).indexOf(mime) === -1) {
-                resolve(false);
-            } else {
-                console.log('the file is able to preview');
-                let element = document.createElement(previewElement[mime]);
-                element.src = URL.createObjectURL(file);
-                element.controls = true;
-                element.onload = _ => {
-                    this.$previewBox.appendChild(element);
-                    resolve(true)
-                };
-                element.addEventListener('loadeddata', _ => resolve(true));
-                element.onerror = _ => reject(`${mime} preview could not be loaded from type ${file.type}`);
+                if (Object.keys(previewElement).indexOf(mime) === -1) {
+                    resolve(false);
+                } else {
+                    let element = document.createElement(previewElement[mime]);
+                    element.controls = true;
+                    element.onload = _ => {
+                        this.$previewBox.appendChild(element);
+                        resolve(true);
+                    };
+                    element.onloadeddata = _ => {
+                        this.$previewBox.appendChild(element);
+                        resolve(true);
+                    };
+                    element.onerror = _ => {
+                        reject(`${mime} preview could not be loaded from type ${file.type}`);
+                    };
+                    element.src = URL.createObjectURL(file);
+                }
+            } catch (e) {
+                reject(`preview could not be loaded from type ${file.type}`);
             }
         });
     }
 
-    async _displayFiles(peerId, displayName, files, imagesOnly, totalSize) {
-        this._parseFileData(displayName, files, imagesOnly, totalSize);
+    async _displayFiles(peerId, displayName, connectionHash, files, imagesOnly, totalSize) {
+        this._parseFileData(displayName, connectionHash, files, imagesOnly, totalSize);
 
         let descriptor, url, filenameDownload;
         if (files.length === 1) {
@@ -733,20 +742,30 @@ class ReceiveFileDialog extends ReceiveDialog {
             setTimeout(_ => this.$downloadBtn.style.pointerEvents = "unset", 2000);
         };
 
-        this.createPreviewElement(files[0]).finally(_ => {
-            document.title = files.length === 1
-                ? 'File received - PairDrop'
-                : `${files.length} Files received - PairDrop`;
-            document.changeFavicon("images/favicon-96x96-notification.png");
-            Events.fire('set-progress', {peerId: peerId, progress: 1, status: 'process'})
-            this.show();
+        document.title = files.length === 1
+            ? 'File received - PairDrop'
+            : `${files.length} Files received - PairDrop`;
+        document.changeFavicon("images/favicon-96x96-notification.png");
+        Events.fire('set-progress', {peerId: peerId, progress: 1, status: 'process'})
+        this.show();
 
+        setTimeout(_ => {
             if (canShare) {
                 this.$shareBtn.click();
             } else {
                 this.$downloadBtn.click();
             }
-        }).catch(r => console.error(r));
+        }, 500);
+
+        this.createPreviewElement(files[0])
+            .then(canPreview => {
+                if (canPreview) {
+                    console.log('the file is able to preview');
+                } else {
+                    console.log('the file is not able to preview');
+                }
+            })
+            .catch(r => console.error(r));
     }
 
     _downloadFilesIndividually(files) {
@@ -803,7 +822,8 @@ class ReceiveRequestDialog extends ReceiveDialog {
         this.correspondingPeerId = peerId;
 
         const displayName = $(peerId).ui._displayName();
-        this._parseFileData(displayName, request.header, request.imagesOnly, request.totalSize);
+        const connectionHash = $(peerId).ui._connectionHash;
+        this._parseFileData(displayName, connectionHash, request.header, request.imagesOnly, request.totalSize);
 
         if (request.thumbnailDataUrl?.substring(0, 22) === "data:image/jpeg;base64") {
             let element = document.createElement('img');
@@ -1245,21 +1265,21 @@ class Base64ZipDialog extends Dialog {
         const base64Hash = window.location.hash.substring(1);
 
         this.$pasteBtn = this.$el.querySelector('#base64-paste-btn');
+        this.$fallbackTextarea = this.$el.querySelector('.textarea');
 
         if (base64Text) {
             this.show();
             if (base64Text === "paste") {
                 // ?base64text=paste
                 // base64 encoded string is ready to be pasted from clipboard
-                this.$pasteBtn.innerText = 'Tap here to paste text';
-                this.$pasteBtn.addEventListener('click', _ => this.processClipboard('text'));
+                this.preparePasting("text");
             } else if (base64Text === "hash") {
                 // ?base64text=hash#BASE64ENCODED
                 // base64 encoded string is url hash which is never sent to server and faster (recommended)
                 this.processBase64Text(base64Hash)
                     .catch(_ => {
                         Events.fire('notify-user', 'Text content is incorrect.');
-                        console.log("Text content incorrect.")
+                        console.log("Text content incorrect.");
                     }).finally(_ => {
                         this.hide();
                     });
@@ -1269,7 +1289,7 @@ class Base64ZipDialog extends Dialog {
                 this.processBase64Text(base64Text)
                     .catch(_ => {
                         Events.fire('notify-user', 'Text content is incorrect.');
-                        console.log("Text content incorrect.")
+                        console.log("Text content incorrect.");
                     }).finally(_ => {
                         this.hide();
                     });
@@ -1282,14 +1302,13 @@ class Base64ZipDialog extends Dialog {
                 this.processBase64Zip(base64Hash)
                     .catch(_ => {
                         Events.fire('notify-user', 'File content is incorrect.');
-                        console.log("File content incorrect.")
+                        console.log("File content incorrect.");
                     }).finally(_ => {
                         this.hide();
                     });
             } else {
                 // ?base64zip=paste || ?base64zip=true
-                this.$pasteBtn.innerText = 'Tap here to paste files';
-                this.$pasteBtn.addEventListener('click', _ => this.processClipboard('file'));
+                this.preparePasting('files');
             }
         }
     }
@@ -1299,39 +1318,60 @@ class Base64ZipDialog extends Dialog {
         this.$pasteBtn.innerText = "Processing...";
     }
 
-    async processClipboard(type) {
-        if (!navigator.clipboard.readText) {
-            Events.fire('notify-user', 'This feature is not available on your browser.');
-            console.log("navigator.clipboard.readText() is not available on your browser.")
-            this.hide();
-            return;
-        }
-
-        this._setPasteBtnToProcessing();
-
-        const base64 = await navigator.clipboard.readText();
-
-        if (!base64) return;
-
-        if (type === "text") {
-            this.processBase64Text(base64)
-                .catch(_ => {
-                    Events.fire('notify-user', 'Clipboard content is incorrect.');
-                    console.log("Clipboard content is incorrect.")
-                }).finally(_ => {
-                    this.hide();
-                });
+    preparePasting(type) {
+        if (navigator.clipboard.readText) {
+            this.$pasteBtn.innerText = `Tap here to paste ${type}`;
+            this._clickCallback = _ => this.processClipboard(type);
+            this.$pasteBtn.addEventListener('click', _ => this._clickCallback());
         } else {
-            this.processBase64Zip(base64)
-                .catch(_ => {
-                    Events.fire('notify-user', 'Clipboard content is incorrect.');
-                    console.log("Clipboard content is incorrect.")
-                }).finally(_ => {
-                    this.hide();
-                });
+            console.log("`navigator.clipboard.readText()` is not available on your browser.\nOn Firefox you can set `dom.events.asyncClipboard.readText` to true under `about:config` for convenience.")
+            this.$pasteBtn.setAttribute('hidden', '');
+            this.$fallbackTextarea.setAttribute('placeholder', `Paste here to send ${type}`);
+            this.$fallbackTextarea.removeAttribute('hidden');
+            this._inputCallback = _ => this.processInput(type);
+            this.$fallbackTextarea.addEventListener('input', _ => this._inputCallback());
+            this.$fallbackTextarea.focus();
         }
     }
 
+    async processInput(type) {
+        const base64 = this.$fallbackTextarea.textContent;
+        this.$fallbackTextarea.textContent = '';
+        await this.processBase64(type, base64);
+    }
+
+    async processClipboard(type) {
+        const base64 = await navigator.clipboard.readText();
+        await this.processBase64(type, base64);
+    }
+
+    isValidBase64(base64) {
+        try {
+            // check if input is base64 encoded
+            window.atob(base64);
+            return true;
+        } catch (e) {
+            // input is not base64 string.
+            return false;
+        }
+    }
+
+    async processBase64(type, base64) {
+        if (!base64 || !this.isValidBase64(base64)) return;
+        this._setPasteBtnToProcessing();
+        try {
+            if (type === "text") {
+                await this.processBase64Text(base64);
+            } else {
+                await this.processBase64Zip(base64);
+            }
+        } catch(_) {
+            Events.fire('notify-user', 'Clipboard content is incorrect.');
+            console.log("Clipboard content is incorrect.")
+        }
+        this.hide();
+    }
+
     processBase64Text(base64Text){
         return new Promise((resolve) => {
             this._setPasteBtnToProcessing();
@@ -1365,6 +1405,8 @@ class Base64ZipDialog extends Dialog {
 
     hide() {
         this.clearBrowserHistory();
+        this.$pasteBtn.removeEventListener('click', _ => this._clickCallback());
+        this.$fallbackTextarea.removeEventListener('input', _ => this._inputCallback());
         super.hide();
     }
 }
@@ -1395,9 +1437,9 @@ class Notifications {
             this.$button.removeAttribute('hidden');
             this.$button.addEventListener('click', _ => this._requestPermission());
         }
-        // Todo: fix Notifications
         Events.on('text-received', e => this._messageNotification(e.detail.text, e.detail.peerId));
         Events.on('files-received', e => this._downloadNotification(e.detail.files));
+        Events.on('files-transfer-request', e => this._requestNotification(e.detail.request, e.detail.peerId));
     }
 
     _requestPermission() {
@@ -1470,8 +1512,29 @@ class Notifications {
         }
     }
 
+    _requestNotification(request, peerId) {
+        if (document.visibilityState !== 'visible') {
+            let imagesOnly = true;
+            for(let i=0; i<request.header.length; i++) {
+                if (request.header[i].mime.split('/')[0] !== 'image') {
+                    imagesOnly = false;
+                    break;
+                }
+            }
+            let descriptor;
+            if (request.header.length > 1) {
+                descriptor = imagesOnly ? ' images' : ' files';
+            } else {
+                descriptor = imagesOnly ? ' image' : ' file';
+            }
+            let displayName = $(peerId).querySelector('.name').textContent
+            let title = `${displayName} would like to transfer ${request.header.length} ${descriptor}`;
+            const notification = this._notify(title, 'Click to show');
+        }
+    }
+
     _download(notification) {
-        $('share-or-download').click();
+        $('download-btn').click();
         notification.close();
     }
 

public/service-worker.js

@@ -1,4 +1,4 @@
-const cacheVersion = 'v1.4.0';
+const cacheVersion = 'v1.4.5';
 const cacheTitle = `pairdrop-cache-${cacheVersion}`;
 const urlsToCache = [
     'index.html',

public/styles.css

@@ -22,13 +22,18 @@ body {
 }
 
 body {
-    min-height: 100vh;
+    height: 100%;
     /* mobile viewport bug fix */
-    min-height: -webkit-fill-available;
+    min-height: -moz-available;          /* WebKit-based browsers will ignore this. */
+    min-height: -webkit-fill-available;  /* Mozilla-based browsers will ignore this. */
+    min-height: fill-available;
 }
 
 html {
-    height: -webkit-fill-available;
+    height: 100%;
+    min-height: -moz-available;          /* WebKit-based browsers will ignore this. */
+    min-height: -webkit-fill-available;  /* Mozilla-based browsers will ignore this. */
+    min-height: fill-available;
 }
 
 .row-reverse {
@@ -791,10 +796,29 @@ x-dialog .dialog-subheader {
     margin: auto -24px;
 }
 
-#base64-paste-btn {
+#base64-paste-btn,
+#base64-paste-dialog .textarea {
     width: 100%;
     height: 40vh;
     border: solid 12px #438cff;
+    text-align: center;
+}
+
+#base64-paste-dialog .textarea {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    text-align: center;
+}
+
+#base64-paste-dialog .textarea::before {
+    font-size: 15px;
+    letter-spacing: 0.12em;
+    color: var(--primary-color);
+    font-weight: 700;
+    text-transform: uppercase;
+    content: attr(placeholder);
 }
 
 #base64-paste-dialog button {

public_included_ws_fallback/index.html

@@ -125,7 +125,7 @@
                     <div class="font-subheading center text-center">Enter key from another device to continue.</div>
                     <div class="center row-reverse">
                         <button class="button" type="submit" disabled>Pair</button>
-                        <button class="button" close>Cancel</button>
+                        <button class="button" type="button" close>Cancel</button>
                     </div>
                 </x-paper>
             </x-background>
@@ -140,7 +140,7 @@
                     <div class="font-subheading center text-center">Are you sure to unpair all devices?</div>
                     <div class="center row-reverse">
                         <button class="button" type="submit">Unpair Devices</button>
-                        <button class="button" close>Cancel</button>
+                        <button class="button" type="button" close>Cancel</button>
                     </div>
                 </x-paper>
             </x-background>
@@ -212,7 +212,7 @@
                     <div id="text-input" class="textarea" role="textbox" autocapitalize="none" spellcheck="false" autofocus contenteditable></div>
                     <div class="center row-reverse">
                         <button class="button" type="submit" title="STR + ENTER" disabled close>Send</button>
-                        <button class="button" title="ESCAPE" close>Cancel</button>
+                        <button class="button" type="button" title="ESCAPE" close>Cancel</button>
                     </div>
                 </x-paper>
             </x-background>
@@ -241,6 +241,7 @@
         <x-background class="full center">
             <x-paper shadow="2">
                 <button class="button center" id="base64-paste-btn" title="Paste">Tap here to paste files</button>
+                <div class="textarea" placeholder="Paste here to send files" title="CMD/⌘ + V" contenteditable hidden></div>
                 <button class="button center" close>Close</button>
             </x-paper>
         </x-background>

public_included_ws_fallback/scripts/network.js

@@ -6,7 +6,6 @@ class ServerConnection {
     constructor() {
         this._connect();
         Events.on('pagehide', _ => this._disconnect());
-        Events.on('beforeunload', _ => this._onBeforeUnload());
         document.addEventListener('visibilitychange', _ => this._onVisibilityChange());
         if (navigator.connection) navigator.connection.addEventListener('change', _ => this._reconnect());
         Events.on('room-secrets', e => this._sendRoomSecrets(e.detail));
@@ -148,7 +147,8 @@ class ServerConnection {
         return ws_url.toString();
     }
 
-    _onBeforeUnload() {
+    _disconnect() {
+        this.send({ type: 'disconnect' });
         if (this._socket) {
             this._socket.onclose = null;
             this._socket.close();
@@ -158,10 +158,6 @@ class ServerConnection {
         }
     }
 
-    _disconnect() {
-        this.send({ type: 'disconnect' });
-    }
-
     _onDisconnect() {
         console.log('WS: server disconnected');
         Events.fire('notify-user', 'Connecting..');
@@ -209,6 +205,10 @@ class Peer {
         this._send(JSON.stringify(message));
     }
 
+    sendDisplayName(displayName) {
+        this.sendJSON({type: 'display-name-changed', displayName: displayName});
+    }
+
     async createHeader(file) {
         return {
             name: file.name,
@@ -505,7 +505,8 @@ class Peer {
     }
 
     _onDisplayNameChanged(message) {
-        if (!message.displayName) return;
+        if (!message.displayName || this._displayName === message.displayName) return;
+        this._displayName = message.displayName;
         Events.fire('peer-display-name-changed', {peerId: this._peerId, displayName: message.displayName});
     }
 }
@@ -534,6 +535,7 @@ class RTCPeer extends Peer {
         this._peerId = peerId;
         this._conn = new RTCPeerConnection(window.rtcConfig);
         this._conn.onicecandidate = e => this._onIceCandidate(e);
+        this._conn.onicecandidateerror = e => this._onError(e);
         this._conn.onconnectionstatechange = _ => this._onConnectionStateChange();
         this._conn.oniceconnectionstatechange = e => this._onIceConnectionStateChange(e);
     }
@@ -584,7 +586,7 @@ class RTCPeer extends Peer {
         const channel = event.channel || event.target;
         channel.binaryType = 'arraybuffer';
         channel.onmessage = e => this._onMessage(e.data);
-        channel.onclose = e => this._onChannelClosed(e);
+        channel.onclose = _ => this._onChannelClosed();
         this._channel = channel;
         Events.on('beforeunload', e => this._onBeforeUnload(e));
         Events.on('pagehide', _ => this._onPageHide());
@@ -628,8 +630,6 @@ class RTCPeer extends Peer {
         if (this._busy) {
             e.preventDefault();
             return "There are unfinished transfers. Are you sure you want to close?";
-        } else {
-            this._disconnect();
         }
     }
 
@@ -706,6 +706,11 @@ class RTCPeer extends Peer {
     _isConnecting() {
         return this._channel && this._channel.readyState === 'connecting';
     }
+
+    sendDisplayName(displayName) {
+        if (!this._isConnected()) return;
+        super.sendDisplayName(displayName);
+    }
 }
 
 class WSPeer extends Peer {
@@ -766,6 +771,7 @@ class PeersManager {
         Events.on('secret-room-deleted', e => this._onSecretRoomDeleted(e.detail));
         Events.on('display-name', e => this._onDisplayName(e.detail.message.displayName));
         Events.on('self-display-name-changed', e => this._notifyPeersDisplayNameChanged(e.detail));
+        Events.on('peer-display-name-changed', e => this._notifyPeerDisplayNameChanged(e.detail.peerId));
         Events.on('ws-disconnected', _ => this._onWsDisconnected());
         Events.on('ws-relay', e => this._onWsRelay(e.detail));
     }
@@ -879,8 +885,8 @@ class PeersManager {
 
     _notifyPeerDisplayNameChanged(peerId) {
         const peer = this.peers[peerId];
-        if (!peer || (peer._conn && (peer._conn.signalingState !== "stable" || !peer._channel || peer._channel.readyState !== "open"))) return;
-        this.peers[peerId].sendJSON({type: 'display-name-changed', displayName: this._displayName});
+        if (!peer) return;
+        this.peers[peerId].sendDisplayName(this._displayName);
     }
 
     _onDisplayName(displayName) {
@@ -974,11 +980,11 @@ class Events {
         window.dispatchEvent(new CustomEvent(type, { detail: detail }));
     }
 
-    static on(type, callback) {
-        return window.addEventListener(type, callback, false);
+    static on(type, callback, options = false) {
+        return window.addEventListener(type, callback, options);
     }
 
-    static off(type, callback) {
-        return window.removeEventListener(type, callback, false);
+    static off(type, callback, options = false) {
+        return window.removeEventListener(type, callback, options);
     }
 }

public_included_ws_fallback/scripts/ui.js

@@ -241,7 +241,7 @@ class PeersUI {
 
             const _callback = (e) => this._sendClipboardData(e, files, text);
             Events.on('paste-pointerdown', _callback);
-            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback));
+            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback), { once: true });
 
             this.$cancelPasteModeBtn.removeAttribute('hidden');
 
@@ -300,7 +300,8 @@ class PeerUI {
 
     constructor(peer, connectionHash) {
         this._peer = peer;
-        this._connectionHash = connectionHash;
+        this._connectionHash =
+            `${connectionHash.substring(0, 4)} ${connectionHash.substring(4, 8)} ${connectionHash.substring(8, 12)} ${connectionHash.substring(12, 16)}`;
         this._initDom();
         this._bindListeners();
 
@@ -345,8 +346,7 @@ class PeerUI {
         this.$el.querySelector('svg use').setAttribute('xlink:href', this._icon());
         this.$el.querySelector('.name').textContent = this._displayName();
         this.$el.querySelector('.device-name').textContent = this._deviceName();
-        this.$el.querySelector('.connection-hash').textContent =
-            this._connectionHash.substring(0, 4) + " " + this._connectionHash.substring(4, 8) + " " + this._connectionHash.substring(8, 12) + " " + this._connectionHash.substring(12, 16);
+        this.$el.querySelector('.connection-hash').textContent = this._connectionHash;
     }
 
     _initDom() {
@@ -570,7 +570,7 @@ class ReceiveDialog extends Dialog {
         }
     }
 
-    _parseFileData(displayName, files, imagesOnly, totalSize) {
+    _parseFileData(displayName, connectionHash, files, imagesOnly, totalSize) {
         if (files.length > 1) {
             let fileOtherText = ` and ${files.length - 1} other `;
             if (files.length === 2) {
@@ -587,6 +587,7 @@ class ReceiveDialog extends Dialog {
         this.$fileStem.innerText = fileName.substring(0, fileName.length - fileExtension.length);
         this.$fileExtension.innerText = fileExtension;
         this.$displayName.innerText = displayName;
+        this.$displayName.title = connectionHash;
         this.$fileSize.innerText = this._formatFileSize(totalSize);
     }
 }
@@ -604,8 +605,9 @@ class ReceiveFileDialog extends ReceiveDialog {
     }
 
     _onFilesReceived(sender, files, imagesOnly, totalSize) {
-        const displayName = $(sender).ui._displayName()
-        this._filesQueue.push({peer: sender, displayName: displayName, files: files, imagesOnly: imagesOnly, totalSize: totalSize});
+        const displayName = $(sender).ui._displayName();
+        const connectionHash = $(sender).ui._connectionHash;
+        this._filesQueue.push({peer: sender, displayName: displayName, connectionHash: connectionHash, files: files, imagesOnly: imagesOnly, totalSize: totalSize});
         this._nextFiles();
         window.blop.play();
     }
@@ -613,12 +615,11 @@ class ReceiveFileDialog extends ReceiveDialog {
     _nextFiles() {
         if (this._busy) return;
         this._busy = true;
-        const {peer, displayName, files, imagesOnly, totalSize} = this._filesQueue.shift();
-        this._displayFiles(peer, displayName, files, imagesOnly, totalSize);
+        const {peer, displayName, connectionHash, files, imagesOnly, totalSize} = this._filesQueue.shift();
+        this._displayFiles(peer, displayName, connectionHash, files, imagesOnly, totalSize);
     }
 
     _dequeueFile() {
-        // Todo: change count in document.title and move '- PairDrop' to back
         if (!this._filesQueue.length) { // nothing to do
             this._busy = false;
             return;
@@ -632,32 +633,40 @@ class ReceiveFileDialog extends ReceiveDialog {
 
     createPreviewElement(file) {
         return new Promise((resolve, reject) => {
-            let mime = file.type.split('/')[0]
-            let previewElement = {
-                image: 'img',
-                audio: 'audio',
-                video: 'video'
-            }
+            try {
+                let mime = file.type.split('/')[0]
+                let previewElement = {
+                    image: 'img',
+                    audio: 'audio',
+                    video: 'video'
+                }
 
-            if (Object.keys(previewElement).indexOf(mime) === -1) {
-                resolve(false);
-            } else {
-                console.log('the file is able to preview');
-                let element = document.createElement(previewElement[mime]);
-                element.src = URL.createObjectURL(file);
-                element.controls = true;
-                element.onload = _ => {
-                    this.$previewBox.appendChild(element);
-                    resolve(true)
-                };
-                element.addEventListener('loadeddata', _ => resolve(true));
-                element.onerror = _ => reject(`${mime} preview could not be loaded from type ${file.type}`);
+                if (Object.keys(previewElement).indexOf(mime) === -1) {
+                    resolve(false);
+                } else {
+                    let element = document.createElement(previewElement[mime]);
+                    element.controls = true;
+                    element.onload = _ => {
+                        this.$previewBox.appendChild(element);
+                        resolve(true);
+                    };
+                    element.onloadeddata = _ => {
+                        this.$previewBox.appendChild(element);
+                        resolve(true);
+                    };
+                    element.onerror = _ => {
+                        reject(`${mime} preview could not be loaded from type ${file.type}`);
+                    };
+                    element.src = URL.createObjectURL(file);
+                }
+            } catch (e) {
+                reject(`preview could not be loaded from type ${file.type}`);
             }
         });
     }
 
-    async _displayFiles(peerId, displayName, files, imagesOnly, totalSize) {
-        this._parseFileData(displayName, files, imagesOnly, totalSize);
+    async _displayFiles(peerId, displayName, connectionHash, files, imagesOnly, totalSize) {
+        this._parseFileData(displayName, connectionHash, files, imagesOnly, totalSize);
 
         let descriptor, url, filenameDownload;
         if (files.length === 1) {
@@ -734,20 +743,30 @@ class ReceiveFileDialog extends ReceiveDialog {
             setTimeout(_ => this.$downloadBtn.style.pointerEvents = "unset", 2000);
         };
 
-        this.createPreviewElement(files[0]).finally(_ => {
-            document.title = files.length === 1
-                ? 'File received - PairDrop'
-                : `${files.length} Files received - PairDrop`;
-            document.changeFavicon("images/favicon-96x96-notification.png");
-            Events.fire('set-progress', {peerId: peerId, progress: 1, status: 'process'})
-            this.show();
+        document.title = files.length === 1
+            ? 'File received - PairDrop'
+            : `${files.length} Files received - PairDrop`;
+        document.changeFavicon("images/favicon-96x96-notification.png");
+        Events.fire('set-progress', {peerId: peerId, progress: 1, status: 'process'})
+        this.show();
 
+        setTimeout(_ => {
             if (canShare) {
                 this.$shareBtn.click();
             } else {
                 this.$downloadBtn.click();
             }
-        }).catch(r => console.error(r));
+        }, 500);
+
+        this.createPreviewElement(files[0])
+            .then(canPreview => {
+                if (canPreview) {
+                    console.log('the file is able to preview');
+                } else {
+                    console.log('the file is not able to preview');
+                }
+            })
+            .catch(r => console.error(r));
     }
 
     _downloadFilesIndividually(files) {
@@ -804,7 +823,8 @@ class ReceiveRequestDialog extends ReceiveDialog {
         this.correspondingPeerId = peerId;
 
         const displayName = $(peerId).ui._displayName();
-        this._parseFileData(displayName, request.header, request.imagesOnly, request.totalSize);
+        const connectionHash = $(peerId).ui._connectionHash;
+        this._parseFileData(displayName, connectionHash, request.header, request.imagesOnly, request.totalSize);
 
         if (request.thumbnailDataUrl?.substring(0, 22) === "data:image/jpeg;base64") {
             let element = document.createElement('img');
@@ -1246,21 +1266,21 @@ class Base64ZipDialog extends Dialog {
         const base64Hash = window.location.hash.substring(1);
 
         this.$pasteBtn = this.$el.querySelector('#base64-paste-btn');
+        this.$fallbackTextarea = this.$el.querySelector('.textarea');
 
         if (base64Text) {
             this.show();
             if (base64Text === "paste") {
                 // ?base64text=paste
                 // base64 encoded string is ready to be pasted from clipboard
-                this.$pasteBtn.innerText = 'Tap here to paste text';
-                this.$pasteBtn.addEventListener('click', _ => this.processClipboard('text'));
+                this.preparePasting("text");
             } else if (base64Text === "hash") {
                 // ?base64text=hash#BASE64ENCODED
                 // base64 encoded string is url hash which is never sent to server and faster (recommended)
                 this.processBase64Text(base64Hash)
                     .catch(_ => {
                         Events.fire('notify-user', 'Text content is incorrect.');
-                        console.log("Text content incorrect.")
+                        console.log("Text content incorrect.");
                     }).finally(_ => {
                         this.hide();
                     });
@@ -1270,7 +1290,7 @@ class Base64ZipDialog extends Dialog {
                 this.processBase64Text(base64Text)
                     .catch(_ => {
                         Events.fire('notify-user', 'Text content is incorrect.');
-                        console.log("Text content incorrect.")
+                        console.log("Text content incorrect.");
                     }).finally(_ => {
                         this.hide();
                     });
@@ -1283,14 +1303,13 @@ class Base64ZipDialog extends Dialog {
                 this.processBase64Zip(base64Hash)
                     .catch(_ => {
                         Events.fire('notify-user', 'File content is incorrect.');
-                        console.log("File content incorrect.")
+                        console.log("File content incorrect.");
                     }).finally(_ => {
                         this.hide();
                     });
             } else {
                 // ?base64zip=paste || ?base64zip=true
-                this.$pasteBtn.innerText = 'Tap here to paste files';
-                this.$pasteBtn.addEventListener('click', _ => this.processClipboard('file'));
+                this.preparePasting('files');
             }
         }
     }
@@ -1300,39 +1319,60 @@ class Base64ZipDialog extends Dialog {
         this.$pasteBtn.innerText = "Processing...";
     }
 
-    async processClipboard(type) {
-        if (!navigator.clipboard.readText) {
-            Events.fire('notify-user', 'This feature is not available on your browser.');
-            console.log("navigator.clipboard.readText() is not available on your browser.")
-            this.hide();
-            return;
-        }
-
-        this._setPasteBtnToProcessing();
-
-        const base64 = await navigator.clipboard.readText();
-
-        if (!base64) return;
-
-        if (type === "text") {
-            this.processBase64Text(base64)
-                .catch(_ => {
-                    Events.fire('notify-user', 'Clipboard content is incorrect.');
-                    console.log("Clipboard content is incorrect.")
-                }).finally(_ => {
-                    this.hide();
-                });
+    preparePasting(type) {
+        if (navigator.clipboard.readText) {
+            this.$pasteBtn.innerText = `Tap here to paste ${type}`;
+            this._clickCallback = _ => this.processClipboard(type);
+            this.$pasteBtn.addEventListener('click', _ => this._clickCallback());
         } else {
-            this.processBase64Zip(base64)
-                .catch(_ => {
-                    Events.fire('notify-user', 'Clipboard content is incorrect.');
-                    console.log("Clipboard content is incorrect.")
-                }).finally(_ => {
-                    this.hide();
-                });
+            console.log("`navigator.clipboard.readText()` is not available on your browser.\nOn Firefox you can set `dom.events.asyncClipboard.readText` to true under `about:config` for convenience.")
+            this.$pasteBtn.setAttribute('hidden', '');
+            this.$fallbackTextarea.setAttribute('placeholder', `Paste here to send ${type}`);
+            this.$fallbackTextarea.removeAttribute('hidden');
+            this._inputCallback = _ => this.processInput(type);
+            this.$fallbackTextarea.addEventListener('input', _ => this._inputCallback());
+            this.$fallbackTextarea.focus();
         }
     }
 
+    async processInput(type) {
+        const base64 = this.$fallbackTextarea.textContent;
+        this.$fallbackTextarea.textContent = '';
+        await this.processBase64(type, base64);
+    }
+
+    async processClipboard(type) {
+        const base64 = await navigator.clipboard.readText();
+        await this.processBase64(type, base64);
+    }
+
+    isValidBase64(base64) {
+        try {
+            // check if input is base64 encoded
+            window.atob(base64);
+            return true;
+        } catch (e) {
+            // input is not base64 string.
+            return false;
+        }
+    }
+
+    async processBase64(type, base64) {
+        if (!base64 || !this.isValidBase64(base64)) return;
+        this._setPasteBtnToProcessing();
+        try {
+            if (type === "text") {
+                await this.processBase64Text(base64);
+            } else {
+                await this.processBase64Zip(base64);
+            }
+        } catch(_) {
+            Events.fire('notify-user', 'Clipboard content is incorrect.');
+            console.log("Clipboard content is incorrect.")
+        }
+        this.hide();
+    }
+
     processBase64Text(base64Text){
         return new Promise((resolve) => {
             this._setPasteBtnToProcessing();
@@ -1366,6 +1406,8 @@ class Base64ZipDialog extends Dialog {
 
     hide() {
         this.clearBrowserHistory();
+        this.$pasteBtn.removeEventListener('click', _ => this._clickCallback());
+        this.$fallbackTextarea.removeEventListener('input', _ => this._inputCallback());
         super.hide();
     }
 }
@@ -1396,9 +1438,9 @@ class Notifications {
             this.$button.removeAttribute('hidden');
             this.$button.addEventListener('click', _ => this._requestPermission());
         }
-        // Todo: fix Notifications
         Events.on('text-received', e => this._messageNotification(e.detail.text, e.detail.peerId));
         Events.on('files-received', e => this._downloadNotification(e.detail.files));
+        Events.on('files-transfer-request', e => this._requestNotification(e.detail.request, e.detail.peerId));
     }
 
     _requestPermission() {
@@ -1471,8 +1513,29 @@ class Notifications {
         }
     }
 
+    _requestNotification(request, peerId) {
+        if (document.visibilityState !== 'visible') {
+            let imagesOnly = true;
+            for(let i=0; i<request.header.length; i++) {
+                if (request.header[i].mime.split('/')[0] !== 'image') {
+                    imagesOnly = false;
+                    break;
+                }
+            }
+            let descriptor;
+            if (request.header.length > 1) {
+                descriptor = imagesOnly ? ' images' : ' files';
+            } else {
+                descriptor = imagesOnly ? ' image' : ' file';
+            }
+            let displayName = $(peerId).querySelector('.name').textContent
+            let title = `${displayName} would like to transfer ${request.header.length} ${descriptor}`;
+            const notification = this._notify(title, 'Click to show');
+        }
+    }
+
     _download(notification) {
-        $('share-or-download').click();
+        $('download-btn').click();
         notification.close();
     }
 

public_included_ws_fallback/service-worker.js

@@ -1,4 +1,4 @@
-const cacheVersion = 'v1.4.0';
+const cacheVersion = 'v1.4.5';
 const cacheTitle = `pairdrop-included-ws-fallback-cache-${cacheVersion}`;
 const urlsToCache = [
     'index.html',

public_included_ws_fallback/styles.css

@@ -23,13 +23,18 @@ body {
 }
 
 body {
-    min-height: 100vh;
+    height: 100%;
     /* mobile viewport bug fix */
-    min-height: -webkit-fill-available;
+    min-height: -moz-available;          /* WebKit-based browsers will ignore this. */
+    min-height: -webkit-fill-available;  /* Mozilla-based browsers will ignore this. */
+    min-height: fill-available;
 }
 
 html {
-    height: -webkit-fill-available;
+    height: 100%;
+    min-height: -moz-available;          /* WebKit-based browsers will ignore this. */
+    min-height: -webkit-fill-available;  /* Mozilla-based browsers will ignore this. */
+    min-height: fill-available;
 }
 
 .row-reverse {
@@ -817,10 +822,29 @@ x-dialog .dialog-subheader {
     margin: auto -24px;
 }
 
-#base64-paste-btn {
+#base64-paste-btn,
+#base64-paste-dialog .textarea {
     width: 100%;
     height: 40vh;
     border: solid 12px #438cff;
+    text-align: center;
+}
+
+#base64-paste-dialog .textarea {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    text-align: center;
+}
+
+#base64-paste-dialog .textarea::before {
+    font-size: 15px;
+    letter-spacing: 0.12em;
+    color: var(--primary-color);
+    font-weight: 700;
+    text-transform: uppercase;
+    content: attr(placeholder);
 }
 
 #base64-paste-dialog button {