Amazfit Bip: Add emoji support when using custom font firmware

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/AbstractDeviceCoordinator.java

@@ -153,6 +153,9 @@ public abstract class AbstractDeviceCoordinator implements DeviceCoordinator {
     @Override
     public boolean supportsUnicodeEmojis() { return false; }
 
+    @Override
+    public boolean supportsCustomFont() { return false; }
+
     @Override
     public int[] getSupportedDeviceSpecificSettings(GBDevice device) {
         return null;

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/DeviceCoordinator.java

@@ -280,6 +280,11 @@ public interface DeviceCoordinator {
      */
     boolean supportsUnicodeEmojis();
 
+    /**
+     * Indicates whether the device supports using a custom font.
+     */
+    boolean supportsCustomFont();
+
     /**
      * Indicates which device specific settings the device supports (not per device type or family, but unique per device).
      */

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/HuamiConst.java

@@ -62,6 +62,7 @@ public class HuamiConst {
     public static final String PREF_LANGUAGE = "language";
     public static final String PREF_DATEFORMAT = "dateformat";
     public static final String PREF_EXPOSE_HR_THIRDPARTY = "expose_hr_thirdparty";
+    public static final String PREF_USE_CUSTOM_FONT = "use_custom_font";
 
     public static int toActivityKind(int rawType) {
         switch (rawType) {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/HuamiCoordinator.java

@@ -197,6 +197,11 @@ public abstract class HuamiCoordinator extends AbstractDeviceCoordinator {
         return prefs.getStringSet(HuamiConst.PREF_DISPLAY_ITEMS, null);
     }
 
+    public static boolean getUseCustomFont(String deviceAddress) {
+        SharedPreferences prefs = GBApplication.getDeviceSpecificSharedPrefs(deviceAddress);
+        return prefs.getBoolean(HuamiConst.PREF_USE_CUSTOM_FONT, false);
+    }
+
     public static boolean getGoalNotification() {
         Prefs prefs = GBApplication.getPrefs();
         return prefs.getBoolean(MiBandConst.PREF_MI2_GOAL_NOTIFICATION, false);

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitbip/AmazfitBipCoordinator.java

@@ -77,6 +77,11 @@ public class AmazfitBipCoordinator extends HuamiCoordinator {
         return true;
     }
 
+    @Override
+    public boolean supportsCustomFont() {
+        return true;
+    }
+
     @Override
     public int[] getSupportedDeviceSpecificSettings(GBDevice device) {
         return new int[]{

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceCommunicationService.java

@@ -51,6 +51,7 @@ import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.activities.HeartRateUtils;
 import nodomain.freeyourgadget.gadgetbridge.devices.DeviceCoordinator;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.AlarmClockReceiver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.AlarmReceiver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.BluetoothConnectReceiver;
@@ -80,6 +81,7 @@ import nodomain.freeyourgadget.gadgetbridge.util.EmojiConverter;
 import nodomain.freeyourgadget.gadgetbridge.util.GB;
 import nodomain.freeyourgadget.gadgetbridge.util.GBPrefs;
 import nodomain.freeyourgadget.gadgetbridge.util.Prefs;
+import nodomain.freeyourgadget.gadgetbridge.util.StringUtils;
 
 import static nodomain.freeyourgadget.gadgetbridge.model.DeviceService.ACTION_ADD_CALENDAREVENT;
 import static nodomain.freeyourgadget.gadgetbridge.model.DeviceService.ACTION_APP_CONFIGURE;
@@ -368,8 +370,23 @@ public class DeviceCommunicationService extends Service implements SharedPrefere
         if (text == null || text.length() == 0)
             return text;
 
-        if (!mCoordinator.supportsUnicodeEmojis())
+        if (!mCoordinator.supportsUnicodeEmojis()) {
+
+            // use custom font for emoji, if it is supported and enabled
+            if (mCoordinator.supportsCustomFont()) {
+                switch (mCoordinator.getDeviceType()) {
+                    case AMAZFITBIP:
+                        if (((HuamiCoordinator)mCoordinator).getUseCustomFont(mGBDevice.getAddress()))
+                            return StringUtils.toCustomFont(text);
+                        break;
+                    // TODO: implement for Amazfit Cor
+                    default:
+                        break;
+                }
+            }
+
             return EmojiConverter.convertUnicodeEmojiToAscii(text, getApplicationContext());
+        }
 
         return text;
     }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/StringUtils.java

@@ -96,4 +96,36 @@ public class StringUtils {
         }
         return "";
     }
+
+    /**
+     * @param str original text
+     * @return str with the emoticons in a format that can be displayed on an
+     * Amazfit Bip by using a custom font firmware with emoji support
+     */
+    public static String toCustomFont(String str) {
+        StringBuilder sb = new StringBuilder();
+        int i = 0;
+        while (i < str.length()) {
+            char charAt = str.charAt(i);
+            if (Character.isHighSurrogate(charAt)) {
+                int i2 = i + 1;
+                try {
+                    int codePoint = Character.toCodePoint(charAt, str.charAt(i2));
+                    if (codePoint < 127744 || codePoint > 129510) {
+                        sb.append(charAt);
+                    } else {
+                        sb.append(Character.toString((char) (codePoint - 83712)));
+                        i = i2;
+                    }
+                } catch (StringIndexOutOfBoundsException e) {
+                    e.printStackTrace();
+                    sb.append(charAt);
+                }
+            } else {
+                sb.append(charAt);
+            }
+            i++;
+        }
+        return sb.toString();
+    }
 }

app/src/main/res/values/strings.xml

@@ -167,6 +167,8 @@
     <string name="pref_title_pebble_reconnect_attempts">Reconnection attempts</string>
     <string name="pref_summary_expose_hr">Allows other apps to access HR data in realtime while Gadgetbridge is connected</string>
     <string name="pref_title_expose_hr">3rd party realtime HR access</string>
+    <string name="pref_title_use_custom_font">Use custom font</string>
+    <string name="pref_summary_use_custom_font">Enable this if your device has a custom font firmware for emoji support</string>
 
     <!-- HPlus Preferences -->
     <string name="pref_title_unit_system">Units</string>

app/src/main/res/xml/devicesettings_amazfitbip.xml

@@ -17,4 +17,10 @@
         android:key="language"
         android:summary="%s"
         android:title="@string/pref_title_language" />
+    <CheckBoxPreference
+        android:icon="@drawable/ic_font_download"
+        android:defaultValue="false"
+        android:key="use_custom_font"
+        android:summary="@string/pref_summary_use_custom_font"
+        android:title="@string/pref_title_use_custom_font" />
 </androidx.preference.PreferenceScreen>