feat(accessibility): add display setting to make app's text size bigger

mastodon/src/main/java/org/joinmastodon/android/GlobalUserPreferences.java

@@ -81,6 +81,7 @@ public class GlobalUserPreferences{
 	public static boolean showPostsWithoutAlt;
 	public static boolean showMediaPreview;
 	public static boolean removeTrackingParams;
+	public static boolean enhanceTextSize;
 
 	public static SharedPreferences getPrefs(){
 		return MastodonApp.context.getSharedPreferences("global", Context.MODE_PRIVATE);
@@ -162,10 +163,10 @@ public class GlobalUserPreferences{
 		showPostsWithoutAlt=prefs.getBoolean("showPostsWithoutAlt", true);
 		showMediaPreview=prefs.getBoolean("showMediaPreview", true);
 		removeTrackingParams=prefs.getBoolean("removeTrackingParams", true);
+		enhanceTextSize=prefs.getBoolean("enhanceTextSize", false);
 
 		theme=ThemePreference.values()[prefs.getInt("theme", 0)];
 
-
 		if (prefs.contains("prefixRepliesWithRe")) {
 			prefixReplies = prefs.getBoolean("prefixRepliesWithRe", false)
 					? PrefixRepliesMode.TO_OTHERS : PrefixRepliesMode.NEVER;
@@ -237,6 +238,7 @@ public class GlobalUserPreferences{
 				.putBoolean("showPostsWithoutAlt", showPostsWithoutAlt)
 				.putBoolean("showMediaPreview", showMediaPreview)
 				.putBoolean("removeTrackingParams", removeTrackingParams)
+				.putBoolean("enhanceTextSize", enhanceTextSize)
 
 				.apply();
 	}

mastodon/src/main/java/org/joinmastodon/android/MainActivity.java

@@ -7,8 +7,10 @@ import android.Manifest;
 import android.app.Activity;
 import android.app.Fragment;
 import android.app.assist.AssistContent;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.net.Uri;
@@ -16,7 +18,9 @@ import android.os.BadParcelableException;
 import android.os.Build;
 import android.os.Bundle;
 import android.provider.MediaStore;
+import android.util.DisplayMetrics;
 import android.util.Log;
+import android.util.TypedValue;
 import android.view.View;
 import android.widget.FrameLayout;
 import android.widget.Toast;
@@ -338,4 +342,26 @@ public class MainActivity extends FragmentStackActivity implements ProvidesAssis
 			}
 		}
 	}
+
+	@Override
+	protected void attachBaseContext(Context base) {
+		if (!GlobalUserPreferences.enhanceTextSize) {
+			super.attachBaseContext(base);
+			return;
+		}
+
+		final Configuration override = new Configuration(base.getResources().getConfiguration());
+		// How much we change the app's density;
+		final int densityDelta = 100;
+
+		// TODO: FIXME: whenever we apply our custom scaling, the switches in the settings appear stretched. I don't know why, but it is what it is.
+		override.screenWidthDp = Math.round(override.densityDpi*((float) override.screenWidthDp/(override.densityDpi+densityDelta)));
+		override.screenHeightDp = Math.round(override.densityDpi*((float) override.screenHeightDp/(override.densityDpi+densityDelta)));
+		override.smallestScreenWidthDp = Math.round(override.densityDpi*((float) override.smallestScreenWidthDp/(override.densityDpi+densityDelta)));
+
+		override.densityDpi = override.densityDpi+densityDelta;
+		final Context newBase = base.createConfigurationContext(override);
+
+		super.attachBaseContext(newBase);
+	}
 }

mastodon/src/main/java/org/joinmastodon/android/fragments/settings/SettingsDisplayFragment.java

@@ -47,7 +47,7 @@ public class SettingsDisplayFragment extends BaseSettingsFragment<Void>{
 	private CheckableListItem<Void> pronounsInUserListingsItem, pronounsInTimelinesItem, pronounsInThreadsItem;
 
 	// MOSHIDON
-	private  CheckableListItem<Void> enableDoubleTapToSwipeItem, relocatePublishButtonItem, showPostDividersItem, enableDoubleTapToSearchItem, showMediaPreviewItem;
+	private  CheckableListItem<Void> enableDoubleTapToSwipeItem, relocatePublishButtonItem, showPostDividersItem, enableDoubleTapToSearchItem, showMediaPreviewItem, enhanceTextSizeItem;
 
 	private AccountLocalPreferences lp;
 
@@ -62,6 +62,7 @@ public class SettingsDisplayFragment extends BaseSettingsFragment<Void>{
 				colorItem=new ListItem<>(getString(R.string.sk_settings_color_palette), getColorPaletteValue(), R.drawable.ic_fluent_color_24_regular, this::onColorClick),
 				trueBlackModeItem=new CheckableListItem<>(R.string.sk_settings_true_black, R.string.mo_setting_true_black_summary, CheckableListItem.Style.SWITCH, GlobalUserPreferences.trueBlackTheme, R.drawable.ic_fluent_dark_theme_24_regular, i->onTrueBlackModeClick(), true),
 				publishTextItem=new ListItem<>(getString(R.string.sk_settings_publish_button_text), getPublishButtonText(), R.drawable.ic_fluent_send_24_regular, this::onPublishTextClick),
+				enhanceTextSizeItem=new CheckableListItem<>(R.string.mo_settings_enhance_text_size, R.string.mo_settings_enhance_text_size_summary, CheckableListItem.Style.SWITCH, GlobalUserPreferences.enhanceTextSize, R.drawable.ic_fluent_text_more_24_regular, i->onEnhanceTextSizeClick()),
 				autoRevealCWsItem=new ListItem<>(R.string.sk_settings_auto_reveal_equal_spoilers, getAutoRevealSpoilersText(), R.drawable.ic_fluent_eye_24_regular, this::onAutoRevealSpoilersClick),
 				relocatePublishButtonItem=new CheckableListItem<>(R.string.mo_relocate_publish_button, R.string.mo_setting_relocate_publish_summary, CheckableListItem.Style.SWITCH, GlobalUserPreferences.relocatePublishButton, R.drawable.ic_fluent_arrow_autofit_down_24_regular, i->toggleCheckableItem(relocatePublishButtonItem)),
 				revealCWsItem=new CheckableListItem<>(R.string.sk_settings_always_reveal_content_warnings, 0, CheckableListItem.Style.SWITCH, lp.revealCWs, R.drawable.ic_fluent_chat_warning_24_regular, i->toggleCheckableItem(revealCWsItem)),
@@ -141,6 +142,7 @@ public class SettingsDisplayFragment extends BaseSettingsFragment<Void>{
 		GlobalUserPreferences.displayPronounsInThreads=pronounsInThreadsItem.checked;
 		GlobalUserPreferences.displayPronounsInUserListings=pronounsInUserListingsItem.checked;
 		GlobalUserPreferences.showMediaPreview=showMediaPreviewItem.checked;
+		GlobalUserPreferences.enhanceTextSize=enhanceTextSizeItem.checked;
 		GlobalUserPreferences.save();
 		if(restartPlease) restartActivityToApplyNewTheme();
 		else E.post(new StatusDisplaySettingsChangedEvent(accountID));
@@ -182,6 +184,11 @@ public class SettingsDisplayFragment extends BaseSettingsFragment<Void>{
 		maybeApplyNewThemeRightNow(null, null, prev);
 	}
 
+	private void onEnhanceTextSizeClick(){
+		toggleCheckableItem(enhanceTextSizeItem);
+		restartActivityToApplyNewTheme();
+	}
+
 	private void onAppearanceClick(ListItem<?> item_){
 		int selected=switch(GlobalUserPreferences.theme){
 			case LIGHT -> 0;

mastodon/src/main/res/values/strings_mo.xml

@@ -120,6 +120,8 @@
 	<string name="mo_settings_unifiedpush_warning_disabled">UnifiedPush is not enabled. You will not receive any notifications.</string>
 	<string name="mo_settings_unifiedpush_enable">Enable</string>
 	<string name="mo_settings_remove_tracking_params">Private Links</string>
+	<string name="mo_settings_enhance_text_size">Enhance text size</string>
+	<string name="mo_settings_enhance_text_size_summary">Makes the app\'s text bigger</string>
 
 	<!--	Temporary Strings. They exist in strings_sk.xml, but are not available on Megalodon's weblate-->
 	<string name="mo_muted_accounts">Muted accounts</string>