Add hasContent param to NTP (#6543)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/488551667048375/task/1210986747757664?focus=true

### Description

- Adds an optional `hasContent` callback to `NewTabPageView` in order to
notify of content to the Input Screen.

### Steps to test this PR
- [ ] Verify that NTP works as expected
- [ ] Verify that the Search Tab on the Input Screen works as expected

Author: joshliebe

app/src/main/java/com/duckduckgo/app/browser/newtab/NewTabLegacyPageView.kt

@@ -74,6 +74,7 @@ class NewTabLegacyPageView @JvmOverloads constructor(
     attrs: AttributeSet? = null,
     defStyle: Int = 0,
     private val showLogo: Boolean = true,
+    private val onHasContent: ((Boolean) -> Unit)? = null,
 ) : LinearLayout(context, attrs, defStyle) {
 
     @Inject
@@ -139,8 +140,10 @@ class NewTabLegacyPageView @JvmOverloads constructor(
 
         if (!showLogo && isHomeBackgroundLogoVisible) {
             this.gone()
+            onHasContent?.invoke(false)
         } else {
             this.show()
+            onHasContent?.invoke(true)
             if (isHomeBackgroundLogoVisible) {
                 homeBackgroundLogo.showLogo()
             } else {

app/src/main/java/com/duckduckgo/app/browser/newtab/NewTabPageProvider.kt

@@ -51,8 +51,12 @@ class RealNewTabPageProvider @Inject constructor(
 )
 class NewTabLegacyPage @Inject constructor() : NewTabPagePlugin {
 
-    override fun getView(context: Context, showLogo: Boolean): View {
-        return NewTabLegacyPageView(context, showLogo = showLogo)
+    override fun getView(
+        context: Context,
+        showLogo: Boolean,
+        onHasContent: ((Boolean) -> Unit)?,
+    ): View {
+        return NewTabLegacyPageView(context, showLogo = showLogo, onHasContent = onHasContent)
     }
 }
 

app/src/test/java/com/duckduckgo/app/browser/newtab/NewTabPageProviderTest.kt

@@ -125,13 +125,21 @@ class NewTabPageProviderTest {
     }
 
     class LegacyNewTabPlugin : NewTabPagePlugin {
-        override fun getView(context: Context, showLogo: Boolean): View {
+        override fun getView(
+            context: Context,
+            showLogo: Boolean,
+            onHasContent: ((Boolean) -> Unit)?,
+        ): View {
             return View(context)
         }
     }
 
     class NewNewTabPlugin : NewTabPagePlugin {
-        override fun getView(context: Context, showLogo: Boolean): View {
+        override fun getView(
+            context: Context,
+            showLogo: Boolean,
+            onHasContent: ((Boolean) -> Unit)?,
+        ): View {
             return View(context)
         }
     }

new-tab-page/new-tab-page-api/src/main/java/com/duckduckgo/newtabpage/api/NewTabPagePlugin.kt

@@ -31,11 +31,14 @@ interface NewTabPagePlugin : ActivePlugin {
      * This method returns a [View] that will be used as the NewTabPage content
      * @param context The context to create the view with
      * @param showLogo Whether to show the logo in the new tab page
+     * @param onHasContent Optional callback to notify when the view has content
      * @return [View]
      */
-    fun getView(context: Context, showLogo: Boolean = true): View {
-        return getView(context)
-    }
+    fun getView(
+        context: Context,
+        showLogo: Boolean = true,
+        onHasContent: ((Boolean) -> Unit)? = null,
+    ): View
 
     companion object {
         const val PRIORITY_LEGACY_NTP = 0

new-tab-page/new-tab-page-impl/src/main/java/com/duckduckgo/newtabpage/impl/NewTabPage.kt

@@ -35,7 +35,11 @@ import javax.inject.Inject
 )
 class NewTabPage @Inject constructor() : NewTabPagePlugin {
 
-    override fun getView(context: Context, showLogo: Boolean): View {
-        return NewTabPageView(context, showLogo = showLogo)
+    override fun getView(
+        context: Context,
+        showLogo: Boolean,
+        onHasContent: ((Boolean) -> Unit)?,
+    ): View {
+        return NewTabPageView(context, showLogo = showLogo, onHasContent = onHasContent)
     }
 }

new-tab-page/new-tab-page-impl/src/main/java/com/duckduckgo/newtabpage/impl/view/NewTabPageView.kt

@@ -53,6 +53,7 @@ class NewTabPageView @JvmOverloads constructor(
     attrs: AttributeSet? = null,
     defStyle: Int = 0,
     private val showLogo: Boolean = true,
+    private val onHasContent: ((Boolean) -> Unit)? = null,
 ) : LinearLayout(context, attrs, defStyle) {
 
     @Inject
@@ -98,8 +99,10 @@ class NewTabPageView @JvmOverloads constructor(
         } else {
             if (!showLogo && viewState.showDax) {
                 this.gone()
+                onHasContent?.invoke(false)
             } else {
                 this.show()
+                onHasContent?.invoke(true)
                 if (viewState.showDax) {
                     binding.ddgLogo.show()
                 } else {