Move several Permissions dependencies to core.

core/ui/build.gradle.kts

@@ -37,4 +37,5 @@ dependencies {
   implementation(libs.kotlinx.serialization.json)
   api(libs.google.zxing.core)
   api(libs.material.material)
+  api(libs.accompanist.permissions)
 }

core/ui/src/main/java/org/signal/core/ui/compose/Permissions.kt

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.ui.compose
+
+import android.Manifest
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.res.stringResource
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.isGranted
+import com.google.accompanist.permissions.rememberPermissionState
+import org.signal.core.ui.R
+
+/**
+ * Dialogs and state management for permissions requests in compose screens.
+ */
+object Permissions {
+
+  interface Controller {
+    fun request()
+  }
+
+  private enum class RequestState {
+    NONE,
+    RATIONALE,
+    SYSTEM
+  }
+
+  @Composable
+  fun cameraPermissionHandler(
+    rationale: String,
+    onPermissionGranted: () -> Unit
+  ): Controller {
+    return permissionHandler(
+      permission = Manifest.permission.CAMERA,
+      icon = SignalIcons.Camera.painter,
+      rationale = rationale,
+      onPermissionGranted = onPermissionGranted
+    )
+  }
+
+  /**
+   * Generic permissions rationale dialog and state management for single permissions.
+   */
+  @OptIn(ExperimentalPermissionsApi::class)
+  @Composable
+  fun permissionHandler(
+    permission: String,
+    icon: Painter,
+    rationale: String,
+    onPermissionGranted: () -> Unit
+  ): Controller {
+    var requestState by remember {
+      mutableStateOf(RequestState.NONE)
+    }
+
+    val permissionState = rememberPermissionState(permission = permission) {
+      if (it && requestState == RequestState.SYSTEM) {
+        onPermissionGranted()
+      }
+    }
+
+    if (requestState == RequestState.RATIONALE) {
+      Dialogs.PermissionRationaleDialog(
+        icon = icon,
+        rationale = rationale,
+        confirm = stringResource(id = R.string.Permissions_continue),
+        dismiss = stringResource(id = R.string.Permissions_not_now),
+        onConfirm = {
+          requestState = RequestState.SYSTEM
+          permissionState.launchPermissionRequest()
+        },
+        onDismiss = {
+          requestState = RequestState.NONE
+        }
+      )
+    }
+
+    return object : Controller {
+      override fun request() {
+        if (permissionState.status.isGranted) {
+          requestState = RequestState.NONE
+          onPermissionGranted()
+        } else {
+          requestState = RequestState.RATIONALE
+        }
+      }
+    }
+  }
+}

core/ui/src/main/java/org/signal/core/ui/util/ThemeUtil.java

@@ -0,0 +1,102 @@
+package org.signal.core.ui.util;
+
+import android.content.Context;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.graphics.Color;
+import android.graphics.drawable.Drawable;
+import android.util.TypedValue;
+import android.view.LayoutInflater;
+
+import androidx.annotation.AttrRes;
+import androidx.annotation.ColorInt;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.StyleRes;
+import androidx.appcompat.content.res.AppCompatResources;
+import androidx.appcompat.view.ContextThemeWrapper;
+
+import org.signal.core.ui.R;
+
+public class ThemeUtil {
+
+  public static boolean isDarkNotificationTheme(@NonNull Context context) {
+    return (context.getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES;
+  }
+
+  public static boolean isDarkTheme(@NonNull Context context) {
+    return getAttribute(context, R.attr.theme_type, "light").equals("dark");
+  }
+
+  public static int getThemedResourceId(@NonNull Context context, @AttrRes int attr) {
+    TypedValue      typedValue = new TypedValue();
+    Resources.Theme theme      = context.getTheme();
+
+    if (theme.resolveAttribute(attr, typedValue, true)) {
+      return typedValue.resourceId;
+    }
+
+    return -1;
+  }
+
+  public static boolean getThemedBoolean(@NonNull Context context, @AttrRes int attr) {
+    TypedValue      typedValue = new TypedValue();
+    Resources.Theme theme      = context.getTheme();
+
+    if (theme.resolveAttribute(attr, typedValue, true)) {
+      return typedValue.data != 0;
+    }
+
+    return false;
+  }
+
+  public static @ColorInt int getThemedColor(@NonNull Context context, @AttrRes int attr) {
+    TypedValue typedValue = new TypedValue();
+    Resources.Theme theme = context.getTheme();
+
+    if (theme.resolveAttribute(attr, typedValue, true)) {
+      return typedValue.data;
+    }
+    return Color.RED;
+  }
+
+  public static @Nullable Drawable getThemedDrawable(@NonNull Context context, @AttrRes int attr) {
+    TypedValue      typedValue = new TypedValue();
+    Resources.Theme theme      = context.getTheme();
+
+    if (theme.resolveAttribute(attr, typedValue, true)) {
+      return AppCompatResources.getDrawable(context, typedValue.resourceId);
+    }
+
+    return null;
+  }
+
+  public static LayoutInflater getThemedInflater(@NonNull Context context, @NonNull LayoutInflater inflater, @StyleRes int theme) {
+    Context contextThemeWrapper = new ContextThemeWrapper(context, theme);
+    return inflater.cloneInContext(contextThemeWrapper);
+  }
+
+  public static float getThemedDimen(@NonNull Context context, @AttrRes int attr) {
+    TypedValue typedValue = new TypedValue();
+    Resources.Theme theme = context.getTheme();
+
+    if (theme.resolveAttribute(attr, typedValue, true)) {
+      return typedValue.getDimension(context.getResources().getDisplayMetrics());
+    }
+
+    return 0;
+  }
+
+  private static String getAttribute(Context context, int attribute, String defaultValue) {
+    TypedValue outValue = new TypedValue();
+
+    if (context.getTheme().resolveAttribute(attribute, outValue, true)) {
+      CharSequence charSequence = outValue.coerceToString();
+      if (charSequence != null) {
+        return charSequence.toString();
+      }
+    }
+
+    return defaultValue;
+  }
+}

core/ui/src/main/java/org/signal/core/ui/view/Stub.java

@@ -0,0 +1,54 @@
+package org.signal.core.ui.view;
+
+
+import android.view.View;
+import android.view.ViewStub;
+
+import androidx.annotation.NonNull;
+
+public class Stub<T extends View> {
+
+  private ViewStub viewStub;
+  private T        view;
+
+  public Stub(@NonNull ViewStub viewStub) {
+    this.viewStub = viewStub;
+  }
+
+  public int getId() {
+    return (viewStub != null) ? viewStub.getId() : view.getId();
+  }
+
+  public T get() {
+    if (view == null) {
+      //noinspection unchecked
+      view     = (T) viewStub.inflate();
+      viewStub = null;
+    }
+
+    return view;
+  }
+
+  public boolean resolved() {
+    return view != null;
+  }
+
+  public void setVisibility(int visibility) {
+    if (resolved() || visibility == View.VISIBLE) {
+      get().setVisibility(visibility);
+    }
+  }
+
+  public int getVisibility() {
+    if (resolved()) {
+      return get().getVisibility();
+    } else {
+      return View.GONE;
+    }
+  }
+
+  public boolean isVisible() {
+    return getVisibility() == View.VISIBLE;
+  }
+
+}

core/ui/src/main/res/values/attrs.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <attr name="theme_type" format="string"/>
+</resources>

core/ui/src/main/res/values/strings.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Permissions -->
+    <!-- Button label to confirm and proceed with a permission request -->
+    <string name="Permissions_continue">Continue</string>
+    <!-- Button label to dismiss or defer a permission request -->
+    <string name="Permissions_not_now">Not now</string>
+</resources>