Introduces ScreenOverlay and ModalScreenOverlayDialogFactory

samples/containers/android/src/main/java/com/squareup/sample/container/SampleContainers.kt

@@ -1,12 +1,11 @@
 package com.squareup.sample.container
 
 import com.squareup.sample.container.overviewdetail.OverviewDetailContainer
-import com.squareup.sample.container.panel.PanelContainer
-import com.squareup.sample.container.panel.ScrimContainer
-import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+import com.squareup.sample.container.panel.PanelOverlayDialogFactory
 import com.squareup.workflow1.ui.ViewRegistry
+import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
 
 @OptIn(WorkflowUiExperimentalApi::class)
 val SampleContainers = ViewRegistry(
-    BackButtonViewFactory, OverviewDetailContainer, PanelContainer, ScrimContainer
+  BackButtonViewFactory, OverviewDetailContainer, PanelOverlayDialogFactory, ScrimContainer
 )

samples/containers/android/src/main/java/com/squareup/sample/container/panel/ScrimContainer.kt → samples/containers/android/src/main/java/com/squareup/sample/container/ScrimContainer.kt

@@ -1,12 +1,12 @@
-package com.squareup.sample.container.panel
+package com.squareup.sample.container
 
 import android.animation.ValueAnimator
 import android.content.Context
 import android.util.AttributeSet
 import android.view.View
 import android.view.ViewGroup
 import androidx.core.content.ContextCompat
-import com.squareup.sample.container.R
+import com.squareup.sample.container.panel.ScrimScreen
 import com.squareup.workflow1.ui.ManualScreenViewFactory
 import com.squareup.workflow1.ui.ScreenViewFactory
 import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
@@ -17,9 +17,9 @@ import com.squareup.workflow1.ui.bindShowRendering
  * A view that renders only its first child, behind a smoke scrim if
  * [isDimmed] is true (tablets only). Other children are ignored.
  *
- * Able to [render][com.squareup.workflow1.ui.showRendering] [ScrimContainerScreen].
+ * Able to [render][com.squareup.workflow1.ui.showRendering] [ScrimScreen].
  */
-class ScrimContainer @JvmOverloads constructor(
+internal class ScrimContainer @JvmOverloads constructor(
   context: Context,
   attributeSet: AttributeSet? = null,
   defStyle: Int = 0,
@@ -91,21 +91,21 @@ class ScrimContainer @JvmOverloads constructor(
   }
 
   @OptIn(WorkflowUiExperimentalApi::class)
-  companion object : ScreenViewFactory<ScrimContainerScreen<*>> by ManualScreenViewFactory(
-      type = ScrimContainerScreen::class,
+  companion object : ScreenViewFactory<ScrimScreen<*>> by ManualScreenViewFactory(
+      type = ScrimScreen::class,
       viewConstructor = { initialRendering, initialViewEnvironment, contextForNewView, _ ->
         val stub = WorkflowViewStub(contextForNewView)
 
         ScrimContainer(contextForNewView)
-            .apply {
-              layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
-              addView(stub)
+            .also { view ->
+              view.layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
+              view.addView(stub)
 
-              bindShowRendering(
-                  initialRendering, initialViewEnvironment
+              view.bindShowRendering(
+                initialRendering, initialViewEnvironment
               ) { rendering, environment ->
-                stub.show(rendering.wrapped, environment)
-                isDimmed = rendering.dimmed
+                stub.show(rendering.content, environment)
+                view.isDimmed = rendering.dimmed
               }
             }
       }

samples/containers/android/src/main/java/com/squareup/sample/container/panel/Contexts.kt

@@ -2,15 +2,9 @@ package com.squareup.sample.container.panel
 
 import android.content.Context
 import android.content.Context.WINDOW_SERVICE
-import android.view.Display
 import android.view.WindowManager
 import com.squareup.sample.container.R
 
-val Context.isPortrait: Boolean get() = resources.getBoolean(R.bool.is_portrait)
-
 val Context.isTablet: Boolean get() = resources.getBoolean(R.bool.is_tablet)
 
 val Context.windowManager: WindowManager get() = getSystemService(WINDOW_SERVICE) as WindowManager
-
-@Suppress("DEPRECATION")
-val Context.defaultDisplay: Display get() = windowManager.defaultDisplay

samples/containers/android/src/main/java/com/squareup/sample/container/panel/PanelOverlayDialogFactory.kt

@@ -0,0 +1,65 @@
+package com.squareup.sample.container.panel
+
+import android.app.Dialog
+import android.graphics.Rect
+import android.graphics.drawable.ColorDrawable
+import android.util.TypedValue
+import android.view.View
+import com.squareup.sample.container.R
+import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+import com.squareup.workflow1.ui.container.ModalScreenOverlayDialogFactory
+import com.squareup.workflow1.ui.container.setBounds
+
+/**
+ * Android support for [PanelOverlay].
+ */
+@OptIn(WorkflowUiExperimentalApi::class)
+internal object PanelOverlayDialogFactory : ModalScreenOverlayDialogFactory<PanelOverlay<*>>(
+  type = PanelOverlay::class
+) {
+  override fun buildDialogWithContentView(contentView: View): Dialog {
+    val context = contentView.context
+    return Dialog(context, R.style.PanelDialog).also { dialog ->
+      dialog.setContentView(contentView)
+
+      // Welcome to Android. Nothing workflow-related here, this is just how one
+      // finds the window background color for the theme. I sure hope it's better in Compose.
+      val maybeWindowColor = TypedValue()
+      context.theme.resolveAttribute(android.R.attr.windowBackground, maybeWindowColor, true)
+      if (
+        maybeWindowColor.type in TypedValue.TYPE_FIRST_COLOR_INT..TypedValue.TYPE_LAST_COLOR_INT
+      ) {
+        dialog.window!!.setBackgroundDrawable(ColorDrawable(maybeWindowColor.data))
+      }
+    }
+  }
+
+  override fun updateBounds(
+    dialog: Dialog,
+    bounds: Rect
+  ) {
+    val refinedBounds: Rect = if (!dialog.context.isTablet) {
+      // On a phone, fill the bounds entirely.
+      bounds
+    } else {
+      if (bounds.height() > bounds.width()) {
+        val margin = bounds.height() - bounds.width()
+        val topDelta = margin / 2
+        val bottomDelta = margin - topDelta
+        Rect(bounds).apply {
+          top = bounds.top + topDelta
+          bottom = bounds.bottom - bottomDelta
+        }
+      } else {
+        val margin = bounds.width() - bounds.height()
+        val leftDelta = margin / 2
+        val rightDelta = margin - leftDelta
+        Rect(bounds).apply {
+          left = bounds.left + leftDelta
+          right = bounds.right - rightDelta
+        }
+      }
+    }
+    dialog.setBounds(refinedBounds)
+  }
+}

samples/containers/android/src/main/res/values/bools.xml

@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <bool name="is_portrait">true</bool>
   <bool name="is_tablet">false</bool>
 </resources>

samples/containers/common/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
 
 dependencies {
   implementation(project(":workflow-ui:container-common"))
+  implementation(project(":workflow-ui:core-android"))
   implementation(project(":workflow-core"))
 
   implementation(Dependencies.Kotlin.Stdlib.jdk6)

samples/containers/common/src/main/java/com/squareup/sample/container/panel/PanelOverlay.kt

@@ -0,0 +1,10 @@
+package com.squareup.sample.container.panel
+
+import com.squareup.workflow1.ui.Screen
+import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+import com.squareup.workflow1.ui.container.ScreenOverlay
+
+@OptIn(WorkflowUiExperimentalApi::class)
+class PanelOverlay<T : Screen>(
+  override val content: T
+) : ScreenOverlay<T>

samples/containers/common/src/main/java/com/squareup/sample/container/panel/ScrimScreen.kt

@@ -0,0 +1,18 @@
+package com.squareup.sample.container.panel
+
+import com.squareup.workflow1.ui.Compatible
+import com.squareup.workflow1.ui.Compatible.Companion.keyFor
+import com.squareup.workflow1.ui.Screen
+import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+
+/**
+ * Show a scrim over some [content], which is invisible if [dimmed] is false,
+ * visible if it is true.
+ */
+@OptIn(WorkflowUiExperimentalApi::class)
+class ScrimScreen<T : Screen>(
+  val content: T,
+  val dimmed: Boolean
+) : Screen, Compatible {
+  override val compatibilityKey = keyFor(content, "ScrimScreen")
+}