Make swipe to refresh tab aware.

[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / views / NestedScrollWebView.java

diff --git a/app/src/main/java/com/stoutner/privacybrowser/views/NestedScrollWebView.java b/app/src/main/java/com/stoutner/privacybrowser/views/NestedScrollWebView.java
index f7d57b68065e7da54c39e25b2680bd29700e079c..6cedf5c2b41967d2cb8b9c74e7b261f9c72ea22d 100644 (file)
--- a/app/src/main/java/com/stoutner/privacybrowser/views/NestedScrollWebView.java
+++ b/app/src/main/java/com/stoutner/privacybrowser/views/NestedScrollWebView.java
@@ -20,15 +20,21 @@
 package com.stoutner.privacybrowser.views;
 
 import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.webkit.WebView;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
 import androidx.core.view.NestedScrollingChild2;
 import androidx.core.view.NestedScrollingChildHelper;
 import androidx.core.view.ViewCompat;
 
+import com.stoutner.privacybrowser.R;
+
 import java.util.ArrayList;
 import java.util.Date;
 
@@ -91,6 +97,15 @@ public class NestedScrollWebView extends WebView implements NestedScrollingChild
     // The ignore pinned domain information tracker.  This is set when a user proceeds past a pinned mismatch dialog to prevent the dialog from showing again until after the domain changes.
     private boolean ignorePinnedDomainInformation;
 
+    // The default or favorite icon.
+    Bitmap favoriteOrDefaultIcon;
+
+    // Track night mode.
+    private boolean nightMode;
+
+    // Track swipe to refresh.
+    private boolean swipeToRefresh;
+
     // The nested scrolling child helper is used throughout the class.
     private NestedScrollingChildHelper nestedScrollingChildHelper;
 
@@ -479,6 +494,61 @@ public class NestedScrollWebView extends WebView implements NestedScrollingChild
     }
 
 
+    // Favorite or default icon.
+    public void initializeFavoriteIcon() {
+        // Get the default favorite icon drawable.  `ContextCompat` must be used until API >= 21.
+        Drawable favoriteIconDrawable = ContextCompat.getDrawable(getContext(), R.drawable.world);
+
+        // Cast the favorite icon drawable to a bitmap drawable.
+        BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
+
+        // Remove the incorrect warning below that the favorite icon bitmap drawable might be null.
+        assert favoriteIconBitmapDrawable != null;
+
+        // Store the default icon bitmap.
+        favoriteOrDefaultIcon = favoriteIconBitmapDrawable.getBitmap();
+    }
+
+    public void setFavoriteOrDefaultIcon(Bitmap icon) {
+        // Scale the favorite icon bitmap down if it is larger than 256 x 256.  Filtering uses bilinear interpolation.
+        if ((icon.getHeight() > 256) || (icon.getWidth() > 256)) {
+            favoriteOrDefaultIcon = Bitmap.createScaledBitmap(icon, 256, 256, true);
+        } else {
+            // Store the icon as presented.
+            favoriteOrDefaultIcon = icon;
+        }
+    }
+
+    public Bitmap getFavoriteOrDefaultIcon() {
+        // Return the favorite or default icon.
+        return favoriteOrDefaultIcon;
+    }
+
+
+    // Night mode.
+    public void setNightMode(boolean status) {
+        // Store the night mode status.
+        nightMode = status;
+    }
+
+    public boolean getNightMode() {
+        // Return the night mode status.
+        return nightMode;
+    }
+
+
+    // Swipe to refresh.
+    public void setSwipeToRefresh(boolean status) {
+        // Store the swipe to refresh status.
+        swipeToRefresh = status;
+    }
+
+    public boolean getSwipeToRefresh() {
+        // Return the swipe to refresh status.
+        return swipeToRefresh;
+    }
+
+
 
     @Override
     public boolean onTouchEvent(MotionEvent motionEvent) {
@@ -520,12 +590,13 @@ public class NestedScrollWebView extends WebView implements NestedScrollingChild
                 // Dispatch the nested pre-school.  This scrolls the app bar if it needs it.  `offsetInWindow` will be returned with an updated value.
                 if (dispatchNestedPreScroll(0, preScrollDeltaY, consumedScroll, offsetInWindow)) {
                     // Update the scroll delta Y if some of it was consumed.
+                    // There is currently a bug in Android where if scrolling up at a certain slow speed the input can lock the pre scroll and continue to consume it after the app bar is fully displayed.
                     scrollDeltaY = preScrollDeltaY - consumedScroll[1];
                 }
 
                 // Check to see if the WebView is at the top and and the scroll action is downward.
                 if ((webViewYPosition == 0) && (scrollDeltaY < 0)) {  // Swipe to refresh is being engaged.
-                    // Stop the nested scroll so that swipe to refresh has complete control.
+                    // Stop the nested scroll so that swipe to refresh has complete control.  This way releasing the scroll to refresh circle doesn't scroll the WebView at the same time.
                     stopNestedScroll();
                 } else {  // Swipe to refresh is not being engaged.
                     // Start the nested scroll so that the app bar can scroll off the screen.