Added: Implement zoom scale disabling feature in terminal view

The user can add `disable-zoom-scale=true` entry to `termux.properties` file to disable text size scaling in terminal view.
 * The default value is `false`. Restarting the termux app or running the `termux-reload-settings` command will update the behavior instantaneously if changed.

app/src/main/java/com/termux/app/terminal/TermuxTerminalViewClient.java

@@ -226,6 +226,11 @@ public boolean isTerminalViewSelected() {
         return mActivity.getTerminalToolbarViewPager() == null || mActivity.isTerminalViewSelected() || mActivity.getTerminalView().hasFocus();
     }
 
+    @Override
+    public boolean isZoomScaleDisabled() {
+        return mActivity.getProperties().isZoomScaleDisabled();
+    }
+
 
 
     @Override

terminal-view/src/main/java/com/termux/view/TerminalView.java

@@ -187,7 +187,7 @@ public boolean onScroll(MotionEvent e, float distanceX, float distanceY) {
 
             @Override
             public boolean onScale(float focusX, float focusY, float scale) {
-                if (mEmulator == null || isSelectingText()) return true;
+                if (mEmulator == null || isSelectingText() || mClient.isZoomScaleDisabled()) return true;
                 mScaleFactor *= scale;
                 mScaleFactor = mClient.onScale(mScaleFactor);
                 return true;

terminal-view/src/main/java/com/termux/view/TerminalViewClient.java

@@ -36,6 +36,7 @@ public interface TerminalViewClient {
 
     boolean isTerminalViewSelected();
 
+    boolean isZoomScaleDisabled();
 
 
     void copyModeChanged(boolean copyMode);

termux-shared/src/main/java/com/termux/shared/termux/settings/properties/TermuxPropertyConstants.java

@@ -80,6 +80,9 @@
  *
  * - 0.18.0 (2022-06-13)
  *      - Add `KEY_DISABLE_FILE_SHARE_RECEIVER` and `KEY_DISABLE_FILE_VIEW_RECEIVER`.
+ * 
+ * - 0.19.0 (2025-01-23)
+ *      - Add `KEY_DISABLE_ZOOM_SCALE`.
  */
 
 /**
@@ -98,6 +101,11 @@ public final class TermuxPropertyConstants {
     private static final String LOG_TAG = "TermuxPropertyConstants";
 
     /* boolean */
+
+    /** Defines the key for whether screen scaling are enabled. */
+    public static final String KEY_DISABLE_ZOOM_SCALE =  "disable-zoom-scale"; // Default: "disable-zoom-scale"
+
+
 
     /** Defines the key for whether file share receiver of the app is enabled. */
     public static final String KEY_DISABLE_FILE_SHARE_RECEIVER =  "disable-file-share-receiver"; // Default: "disable-file-share-receiver"
@@ -390,7 +398,8 @@ public final class TermuxPropertyConstants {
      * Setting this to {@code null} will make {@link SharedProperties} throw an exception.
      * */
     public static final Set<String> TERMUX_APP_PROPERTIES_LIST = new HashSet<>(Arrays.asList(
-        /* boolean */
+        /* boolean */        
+        KEY_DISABLE_ZOOM_SCALE,
         KEY_DISABLE_FILE_SHARE_RECEIVER,
         KEY_DISABLE_FILE_VIEW_RECEIVER,
         KEY_DISABLE_HARDWARE_KEYBOARD_SHORTCUTS,
@@ -439,6 +448,7 @@ public final class TermuxPropertyConstants {
      * default: false
      */
     public static final Set<String> TERMUX_DEFAULT_FALSE_BOOLEAN_BEHAVIOUR_PROPERTIES_LIST = new HashSet<>(Arrays.asList(
+        KEY_DISABLE_ZOOM_SCALE,
         KEY_DISABLE_FILE_SHARE_RECEIVER,
         KEY_DISABLE_FILE_VIEW_RECEIVER,
         KEY_DISABLE_HARDWARE_KEYBOARD_SHORTCUTS,

termux-shared/src/main/java/com/termux/shared/termux/settings/properties/TermuxSharedProperties.java

@@ -573,6 +573,9 @@ public static String getVolumeKeysBehaviourInternalPropertyValueFromValue(String
 
 
 
+    public boolean isZoomScaleDisabled() {
+        return (boolean) getInternalPropertyValue(TermuxPropertyConstants.KEY_DISABLE_ZOOM_SCALE, true);
+    }
 
     public boolean shouldAllowExternalApps() {
         return (boolean) getInternalPropertyValue(TermuxConstants.PROP_ALLOW_EXTERNAL_APPS, true);

termux-shared/src/main/java/com/termux/shared/termux/terminal/TermuxTerminalViewClientBase.java

@@ -12,6 +12,11 @@ public class TermuxTerminalViewClientBase implements TerminalViewClient {
     public TermuxTerminalViewClientBase() {
     }
 
+    @Override
+    public boolean isZoomScaleDisabled() {
+        return false;
+    }
+
     @Override
     public float onScale(float scale) {
         return 1.0f;