increment version to 16

Bumps [kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 1.7.10 to 1.7.20.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v1.7.20/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/compare/v1.7.10...v1.7.20)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

app/build.gradle.kts

@@ -41,7 +41,7 @@ android {
         applicationId = "app.grapheneos.pdfviewer"
         minSdk = 26
         targetSdk = 33
-        versionCode = 15
+        versionCode = 16
         versionName = versionCode.toString()
         resourceConfigurations.add("en")
     }

app/src/main/AndroidManifest.xml

@@ -3,13 +3,15 @@
         android:targetSandboxVersion="2">
     <original-package android:name="org.grapheneos.pdfviewer" />
 
-    <application android:icon="@mipmap/ic_launcher"
-            android:roundIcon="@mipmap/ic_launcher"
+    <application android:name=".App"
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
             android:label="@string/app_name"
-            android:theme="@style/AppTheme"
-            android:allowBackup="true">
+            android:roundIcon="@mipmap/ic_launcher"
+            android:theme="@style/AppTheme">
         <activity android:name=".PdfViewer"
-            android:exported="true">
+                android:documentLaunchMode="always"
+                android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

app/src/main/assets/viewer.js

@@ -73,7 +73,7 @@ function renderPage(pageNumber, zoom, prerender, prerenderTrigger=0) {
     for (let i = 0; i < cache.length; i++) {
         const cached = cache[i];
         if (cached.pageNumber === pageNumber && cached.zoomRatio === newZoomRatio &&
-                cache.orientationDegrees === orientationDegrees) {
+                cached.orientationDegrees === orientationDegrees) {
             if (useRender) {
                 cache.splice(i, 1);
                 cache.push(cached);

app/src/main/java/app/grapheneos/pdfviewer/App.kt

@@ -0,0 +1,13 @@
+package app.grapheneos.pdfviewer
+
+import android.app.Application
+import com.google.android.material.color.DynamicColors
+
+class App : Application() {
+
+    override fun onCreate() {
+        super.onCreate()
+        DynamicColors.applyToActivitiesIfAvailable(this)
+    }
+
+}

app/src/main/java/app/grapheneos/pdfviewer/KtUtils.kt

@@ -7,7 +7,12 @@ import java.io.IOException
 import java.io.InputStream
 import java.io.OutputStream
 
-@Throws(FileNotFoundException::class, IOException::class)
+@Throws(
+    FileNotFoundException::class,
+    IOException::class,
+    IllegalArgumentException::class,
+    OutOfMemoryError::class
+)
 fun saveAs(context: Context, existingUri: Uri, saveAs: Uri) {
 
     context.asInputStream(existingUri)?.use { inputStream ->

app/src/main/java/app/grapheneos/pdfviewer/PdfViewer.java

@@ -44,6 +44,7 @@ import app.grapheneos.pdfviewer.databinding.PdfviewerBinding;
 import app.grapheneos.pdfviewer.fragment.DocumentPropertiesFragment;
 import app.grapheneos.pdfviewer.fragment.PasswordPromptFragment;
 import app.grapheneos.pdfviewer.fragment.JumpToPageFragment;
+import app.grapheneos.pdfviewer.ktx.ViewKt;
 import app.grapheneos.pdfviewer.loader.DocumentPropertiesLoader;
 import app.grapheneos.pdfviewer.viewModel.PasswordStatus;
 
@@ -331,8 +332,7 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
                         if (mUri != null) {
                             binding.webview.evaluateJavascript("isTextSelected()", selection -> {
                                 if (!Boolean.parseBoolean(selection)) {
-                                    if ((getWindow().getDecorView().getSystemUiVisibility() &
-                                            View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
+                                    if (getSupportActionBar().isShowing()) {
                                         hideSystemUi();
                                     } else {
                                         showSystemUi();
@@ -569,21 +569,12 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
     }
 
     private void showSystemUi() {
-        getWindow().getDecorView().setSystemUiVisibility(
-                View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
-                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
-                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+        ViewKt.showSystemUi(binding.getRoot(), getWindow());
         getSupportActionBar().show();
     }
 
     private void hideSystemUi() {
-        getWindow().getDecorView().setSystemUiVisibility(
-                View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
-                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
-                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
-                View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                View.SYSTEM_UI_FLAG_FULLSCREEN |
-                View.SYSTEM_UI_FLAG_IMMERSIVE);
+        ViewKt.hideSystemUi(binding.getRoot(), getWindow());
         getSupportActionBar().hide();
     }
 
@@ -610,7 +601,7 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
     }
 
     @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
+    public boolean onCreateOptionsMenu(@NonNull Menu menu) {
         super.onCreateOptionsMenu(menu);
         MenuInflater inflater = getMenuInflater();
         inflater.inflate(R.menu.pdf_viewer, menu);
@@ -618,7 +609,7 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
     }
 
     @Override
-    public boolean onPrepareOptionsMenu(Menu menu) {
+    public boolean onPrepareOptionsMenu(@NonNull Menu menu) {
         final int[] ids = {R.id.action_jump_to_page, R.id.action_next, R.id.action_previous,
                 R.id.action_first, R.id.action_last, R.id.action_rotate_clockwise,
                 R.id.action_rotate_counterclockwise, R.id.action_view_document_properties,
@@ -718,8 +709,7 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
     private void saveDocumentAs(Uri uri) {
         try {
             KtUtilsKt.saveAs(this, mUri, uri);
-        } catch (IOException e) {
-            e.printStackTrace();
+        } catch (IOException | OutOfMemoryError | IllegalArgumentException e) {
             snackbar.setText(R.string.error_while_saving).show();
         }
     }

app/src/main/java/app/grapheneos/pdfviewer/Utils.java

@@ -25,6 +25,14 @@ public class Utils {
         return format.format(kb / 1000) + " MB (" + fileSize + " Bytes)";
     }
 
+    private static int parseIntSafely(String field) throws ParseException  {
+        try {
+            return Integer.parseInt(field);
+        } catch (NumberFormatException e) {
+            throw new ParseException("Error while parsing int", -1);
+        }
+    }
+
     // Parse date as per PDF spec (complies with PDF v1.4 to v1.7)
     public static String parseDate(String date) throws ParseException {
         int position = 0;
@@ -45,7 +53,7 @@ public class Utils {
         if (!TextUtils.isDigitsOnly(field)) {
             throw new ParseException("Invalid year", position);
         }
-        int year = Integer.parseInt(field);
+        int year = parseIntSafely(field);
         if (year > currentYear) {
             year = currentYear;
         }
@@ -66,7 +74,7 @@ public class Utils {
             if (!TextUtils.isDigitsOnly(field)) {
                 throw new ParseException("Invalid month", position);
             }
-            month = Integer.parseInt(field) - 1;
+            month = parseIntSafely(field) - 1;
             if (month > 11) {
                 throw new ParseException("Invalid month", position);
             }
@@ -77,7 +85,7 @@ public class Utils {
             if (!TextUtils.isDigitsOnly(field)) {
                 throw new ParseException("Invalid day", position);
             }
-            day = Integer.parseInt(field);
+            day = parseIntSafely(field);
             if (day > 31) {
                 throw new ParseException("Invalid day", position);
             }
@@ -88,7 +96,7 @@ public class Utils {
             if (!TextUtils.isDigitsOnly(field)) {
                 throw new ParseException("Invalid hours", position);
             }
-            hours = Integer.parseInt(field);
+            hours = parseIntSafely(field);
             if (hours > 23) {
                 throw new ParseException("Invalid hours", position);
             }
@@ -99,7 +107,7 @@ public class Utils {
             if (!TextUtils.isDigitsOnly(field)) {
                 throw new ParseException("Invalid minutes", position);
             }
-            minutes = Integer.parseInt(field);
+            minutes = parseIntSafely(field);
             if (minutes > 59) {
                 throw new ParseException("Invalid minutes", position);
             }
@@ -110,7 +118,7 @@ public class Utils {
             if (!TextUtils.isDigitsOnly(field)) {
                 throw new ParseException("Invalid seconds", position);
             }
-            seconds = Integer.parseInt(field);
+            seconds = parseIntSafely(field);
             if (seconds > 59) {
                 throw new ParseException("Invalid seconds", position);
             }
@@ -134,7 +142,7 @@ public class Utils {
                 if (!TextUtils.isDigitsOnly(field)) {
                     throw new ParseException("Invalid UTC offset hours", position);
                 }
-                offsetHours = Integer.parseInt(field);
+                offsetHours = parseIntSafely(field);
                 final int offsetHoursMinutes = offsetHours * 100 + offsetMinutes;
 
                 // Validate UTC offset (UTC-12:00 to UTC+14:00)
@@ -157,7 +165,7 @@ public class Utils {
                     if (!TextUtils.isDigitsOnly(field)) {
                         throw new ParseException("Invalid UTC offset minutes", position);
                     }
-                    offsetMinutes = Integer.parseInt(field);
+                    offsetMinutes = parseIntSafely(field);
                     if (offsetMinutes > 59) {
                         throw new ParseException("Invalid UTC offset minutes", position);
                     }

app/src/main/java/app/grapheneos/pdfviewer/ktx/View.kt

@@ -0,0 +1,20 @@
+package app.grapheneos.pdfviewer.ktx
+
+import android.view.View
+import android.view.Window
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.WindowInsetsControllerCompat
+
+private val systemBars = WindowInsetsCompat.Type.statusBars()
+
+fun View.hideSystemUi(window: Window) {
+    val controller = WindowCompat.getInsetsController(window, this)
+    controller.systemBarsBehavior =
+        WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
+    controller.hide(systemBars)
+}
+
+fun View.showSystemUi(window: Window) {
+    WindowCompat.getInsetsController(window, this).show(systemBars)
+}

app/src/main/java/app/grapheneos/pdfviewer/loader/DocumentPropertiesLoader.java

@@ -132,7 +132,7 @@ public class DocumentPropertiesLoader extends AsyncTaskLoader<List<CharSequence>
         final SpannableStringBuilder property = new SpannableStringBuilder(name).append(":\n");
         final String value = json != null ? json.optString(specName, "-") : specName;
 
-        if (specName.endsWith("Date")) {
+        if (specName != null && specName.endsWith("Date")) {
             final Context context = getContext();
             try {
                 property.append(value.equals("-") ? value : Utils.parseDate(value));

app/src/main/res/layout/pdfviewer.xml

@@ -14,7 +14,6 @@
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
-            android:background="#212121"
             app:popupTheme="@style/AppTheme.PopupOverlay" />
 
     </com.google.android.material.appbar.AppBarLayout>

app/src/main/res/values-night/styles.xml

@@ -1,13 +1,14 @@
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
 
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
         <!-- Customize your theme here. -->
         <item name="colorPrimary">#DEFFFFFF</item>
-        <item name="android:statusBarColor">#212121</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@android:color/transparent</item>
+        <item name="android:windowLightNavigationBar" tools:ignore="NewApi">false</item>
     </style>
 
-    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.Material3.Dark" />
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.Material3.DynamicColors.Dark" />
 
 </resources>

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

@@ -1,15 +1,16 @@
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
 
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
         <!-- Customize your theme here. -->
         <item name="colorPrimary">#000000</item>
-        <item name="android:statusBarColor">#212121</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@android:color/transparent</item>
+        <item name="android:windowLightNavigationBar" tools:ignore="NewApi">true</item>
     </style>
 
-    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.Material3.Dark" />
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.Material3.DynamicColors.Dark" />
 
-    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.Material3.Light" />
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.Material3.DynamicColors.Light" />
 
 </resources>

build.gradle.kts

@@ -11,7 +11,7 @@ buildscript {
     }
     dependencies {
         classpath("com.android.tools.build:gradle:7.3.0")
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.10")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
     }
 }