From 63b60440fdd223f8fe42b791fd64c9d8a9d9c0f3 Mon Sep 17 00:00:00 2001
From: Alex Burdusel <alexandru.burdusel@gmail.com>
Date: Sun, 21 Nov 2021 21:39:47 +0200
Subject: [PATCH] Inject text via ADB keyboard as fallback to injecting key
 event

---
 .../com/genymobile/scrcpy/Controller.java     | 10 ++++-
 .../java/com/genymobile/scrcpy/Device.java    | 37 +++++++++++++++++++
 2 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/server/src/main/java/com/genymobile/scrcpy/Controller.java b/server/src/main/java/com/genymobile/scrcpy/Controller.java
index 481c512fc4..614f7de6a6 100644
--- a/server/src/main/java/com/genymobile/scrcpy/Controller.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Controller.java
@@ -165,11 +165,17 @@ private int injectText(String text) {
         int successCount = 0;
         for (char c : text.toCharArray()) {
             if (!injectChar(c)) {
-                Ln.w("Could not inject char u+" + String.format("%04x", (int) c));
-                continue;
+                    continue;
             }
             successCount++;
         }
+        if (successCount == 0) {
+            if (device.injectViaAdbKeyboard(text)) {
+                return text.length();
+            } else {
+                Ln.w("Could not inject text " + text);
+            }
+        }
         return successCount;
     }
 
diff --git a/server/src/main/java/com/genymobile/scrcpy/Device.java b/server/src/main/java/com/genymobile/scrcpy/Device.java
index 763a7fadbd..4469ccf123 100644
--- a/server/src/main/java/com/genymobile/scrcpy/Device.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Device.java
@@ -17,6 +17,9 @@
 import android.view.KeyCharacterMap;
 import android.view.KeyEvent;
 
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.Objects;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 public final class Device {
@@ -210,6 +213,40 @@ public boolean injectKeyEvent(int action, int keyCode, int repeat, int metaState
         return injectKeyEvent(action, keyCode, repeat, metaState, displayId, injectMode);
     }
 
+    /**
+     * @param text the text to inject via ADB Keyboard
+     * @return true if the text was successfully injected, false otherwise
+     */
+    public boolean injectViaAdbKeyboard(String text) {
+        try {
+            Runtime runtime = Runtime.getRuntime();
+            Process checkImeProc = runtime.exec("settings get secure default_input_method");
+            String selectedIme = null;
+            try (BufferedReader checkImeInput = new BufferedReader(
+                new InputStreamReader(checkImeProc.getInputStream()))) {
+                String line;
+                while ((line = checkImeInput.readLine()) != null) {
+                    if (selectedIme != null) {
+                        Ln.e("Found multiple IME");
+                        return false;
+                    }
+                    selectedIme = line;
+                }
+            }
+            if (Objects.equals(selectedIme, "com.android.adbkeyboard/.AdbIME")) {
+                Process broadcastProc = runtime.exec(
+                    "am broadcast -a ADB_INPUT_TEXT --es msg " + text);
+                return broadcastProc.waitFor() == 0;
+            } else {
+                Ln.i("ADB Keyboard needs to be installed and selected as default input to send text through it");
+            }
+            return false;
+        } catch (Throwable throwable) {
+            Ln.e("Encountered error while trying ti send char  through IME", throwable);
+            return false;
+        }
+    }
+
     public static boolean pressReleaseKeycode(int keyCode, int displayId, int injectMode) {
         return injectKeyEvent(KeyEvent.ACTION_DOWN, keyCode, 0, 0, displayId, injectMode)
                 && injectKeyEvent(KeyEvent.ACTION_UP, keyCode, 0, 0, displayId, injectMode);