Merge "Announce scaled value for font scaling seekbar in Talkback" into udc-dev am: 470dbd6884 am: c96e19f819

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/22347809

Change-Id: I66795c6f016a705acdd20526b443e50f8f89cac0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

src/com/android/settings/accessibility/PreviewSizeSeekBarController.java

@@ -28,6 +28,7 @@ import androidx.preference.PreferenceScreen;
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
 import com.android.settings.widget.LabeledSeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
 import com.android.settingslib.core.lifecycle.events.OnCreate;
 import com.android.settingslib.core.lifecycle.events.OnDestroy;
@@ -52,11 +53,14 @@ abstract class PreviewSizeSeekBarController extends BasePreferenceController imp
     private AccessibilityQuickSettingsTooltipWindow mTooltipWindow;
     private final Handler mHandler;
 
+    private String[] mStateLabels = null;
 
     private final SeekBar.OnSeekBarChangeListener mSeekBarChangeListener =
             new SeekBar.OnSeekBarChangeListener() {
                 @Override
                 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+                    setSeekbarStateDescription(progress);
+
                     if (mInteractionListener.isEmpty()) {
                         return;
                     }
@@ -141,6 +145,7 @@ abstract class PreviewSizeSeekBarController extends BasePreferenceController imp
         if (mNeedsQSTooltipReshow) {
             mHandler.post(this::showQuickSettingsTooltipIfNeeded);
         }
+        setSeekbarStateDescription(mSeekBarPreference.getProgress());
     }
 
     @Override
@@ -153,6 +158,34 @@ abstract class PreviewSizeSeekBarController extends BasePreferenceController imp
         mInteractionListener.ifPresent(ProgressInteractionListener::onProgressChanged);
     }
 
+    /**
+     * Stores the String array we would like to use for describing the state of seekbar progress
+     * and updates the state description with current progress.
+     *
+     * @param labels The state descriptions to be announced for each progress.
+     */
+    public void setProgressStateLabels(String[] labels) {
+        mStateLabels = labels;
+        if (mStateLabels == null) {
+            return;
+        }
+        updateState(mSeekBarPreference);
+    }
+
+    /**
+     * Sets the state of seekbar based on current progress. The progress of seekbar is
+     * corresponding to the index of the string array. If the progress is larger than or equals
+     * to the length of the array, the state description is set to an empty string.
+     */
+    private void setSeekbarStateDescription(int index) {
+        if (mStateLabels == null) {
+            return;
+        }
+        mSeekBarPreference.setSeekBarStateDescription(
+                (index < mStateLabels.length)
+                        ? mStateLabels[index] : "");
+    }
+
     private void onProgressFinalized() {
         // Using progress in SeekBarPreference since the progresses in
         // SeekBarPreference and seekbar are not always the same.

src/com/android/settings/accessibility/TextReadingPreferenceFragment.java

@@ -170,6 +170,15 @@ public class TextReadingPreferenceFragment extends DashboardFragment {
                         R.string.accessibility_font_scaling_auto_added_qs_tooltip_content);
             }
         };
+        final String[] labelArray = new String[fontSizeData.getValues().size()];
+        for (int i = 0; i < labelArray.length; i++) {
+            labelArray[i] =
+                    context.getResources().getString(
+                            com.android.settingslib.R.string.font_scale_percentage,
+                            (int) (fontSizeData.getValues().get(i) * 100)
+                    );
+        }
+        fontSizeController.setProgressStateLabels(labelArray);
         fontSizeController.setInteractionListener(mPreviewController);
         getSettingsLifecycle().addObserver(fontSizeController);
         controllers.add(fontSizeController);

tests/robotests/src/com/android/settings/accessibility/PreviewSizeSeekBarControllerTest.java

@@ -43,6 +43,7 @@ import com.android.settings.SettingsPreferenceFragment;
 import com.android.settings.testutils.shadow.ShadowFragment;
 import com.android.settings.testutils.shadow.ShadowInteractionJankMonitor;
 import com.android.settings.widget.LabeledSeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -75,6 +76,7 @@ public class PreviewSizeSeekBarControllerTest {
     private PreferenceViewHolder mHolder;
     @Mock(answer = Answers.RETURNS_DEEP_STUBS)
     private PreferenceManager mPreferenceManager;
+    private SeekBar mSeekBar;
 
     @Mock
     private PreviewSizeSeekBarController.ProgressInteractionListener mInteractionListener;
@@ -101,8 +103,10 @@ public class PreviewSizeSeekBarControllerTest {
         mSeekBarPreference.setKey(FONT_SIZE_KEY);
 
         LayoutInflater inflater = LayoutInflater.from(mContext);
-        mHolder = PreferenceViewHolder.createInstanceForTests(inflater.inflate(
-                R.layout.preference_labeled_slider, null));
+        mHolder = spy(PreferenceViewHolder.createInstanceForTests(inflater.inflate(
+                R.layout.preference_labeled_slider, null)));
+        mSeekBar = spy(new SeekBar(mContext));
+        doReturn(mSeekBar).when(mHolder).findViewById(com.android.internal.R.id.seekbar);
         mSeekBarPreference.onBindViewHolder(mHolder);
 
         when(mPreferenceScreen.findPreference(anyString())).thenReturn(mSeekBarPreference);
@@ -224,6 +228,22 @@ public class PreviewSizeSeekBarControllerTest {
         assertThat(getLatestPopupWindow().isShowing()).isTrue();
     }
 
+    @Test
+    public void onProgressChanged_setCorrespondingCustomizedStateDescription() {
+        String[] stateLabels = new String[]{"1", "2", "3", "4", "5"};
+        mSeekBarController.setProgressStateLabels(stateLabels);
+        mSeekBarController.displayPreference(mPreferenceScreen);
+
+        int progress = 3;
+        mSeekBarPreference.setProgress(progress);
+        mSeekBarPreference.onProgressChanged(mSeekBar,
+                progress,
+                /* fromUser= */ false);
+
+        verify(mSeekBarPreference).setSeekBarStateDescription(stateLabels[progress]);
+        assertThat(mSeekBar.getStateDescription().toString()).isEqualTo(stateLabels[progress]);
+    }
+
     private static class TestFragment extends SettingsPreferenceFragment {
 
         @Override