Merge remote-tracking branch 'upstream/master'

2023-01-26 00:56:05 +01:00
parent 8d722a2130 bcb3e217cd
commit 331d490f4f
8 changed files with 511 additions and 353 deletions
--- a/mastodon/src/main/java/org/joinmastodon/android/utils/ElevationOnScrollListener.java
+++ b/mastodon/src/main/java/org/joinmastodon/android/utils/ElevationOnScrollListener.java
@@ -0,0 +1,116 @@
+package org.joinmastodon.android.utils;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.content.Context;
+import android.graphics.Color;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
+import android.view.View;
+
+import org.joinmastodon.android.R;
+import org.joinmastodon.android.ui.utils.UiUtils;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+import me.grishka.appkit.utils.CubicBezierInterpolator;
+import me.grishka.appkit.utils.V;
+import me.grishka.appkit.views.FragmentRootLinearLayout;
+
+public class ElevationOnScrollListener extends RecyclerView.OnScrollListener implements View.OnScrollChangeListener{
+	private boolean isAtTop;
+	private Animator currentPanelsAnim;
+	private View[] views;
+	private FragmentRootLinearLayout fragmentRootLayout;
+
+	public ElevationOnScrollListener(FragmentRootLinearLayout fragmentRootLayout, View... views){
+		isAtTop=true;
+		this.fragmentRootLayout=fragmentRootLayout;
+		this.views=views;
+		for(View v:views){
+			Drawable bg=v.getBackground().mutate();
+			v.setBackground(bg);
+			if(bg instanceof LayerDrawable ld){
+				Drawable overlay=ld.findDrawableByLayerId(R.id.color_overlay);
+				if(overlay!=null){
+					overlay.setAlpha(0);
+				}
+			}
+		}
+	}
+
+	public void setViews(View... views){
+		List<View> oldViews=Arrays.asList(this.views);
+		this.views=views;
+		for(View v:views){
+			if(oldViews.contains(v))
+				continue;
+			Drawable bg=v.getBackground().mutate();
+			v.setBackground(bg);
+			if(bg instanceof LayerDrawable ld){
+				Drawable overlay=ld.findDrawableByLayerId(R.id.color_overlay);
+				if(overlay!=null){
+					overlay.setAlpha(isAtTop ? 0 : 20);
+				}
+			}
+			v.setTranslationZ(isAtTop ? 0 : V.dp(3));
+		}
+	}
+
+	@Override
+	public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy){
+		boolean newAtTop=recyclerView.getChildCount()==0 || (recyclerView.getChildAdapterPosition(recyclerView.getChildAt(0))==0 && recyclerView.getChildAt(0).getTop()==recyclerView.getPaddingTop());
+		handleScroll(recyclerView.getContext(), newAtTop);
+	}
+
+	@Override
+	public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY){
+		handleScroll(v.getContext(), scrollY==0);
+	}
+
+	private void handleScroll(Context context, boolean newAtTop){
+		if(newAtTop!=isAtTop){
+			isAtTop=newAtTop;
+			if(currentPanelsAnim!=null)
+				currentPanelsAnim.cancel();
+
+			AnimatorSet set=new AnimatorSet();
+			ArrayList<Animator> anims=new ArrayList<>();
+			for(View v:views){
+				if(v.getBackground() instanceof LayerDrawable ld){
+					Drawable overlay=ld.findDrawableByLayerId(R.id.color_overlay);
+					if(overlay!=null){
+						anims.add(ObjectAnimator.ofInt(overlay, "alpha", isAtTop ? 0 : 20));
+					}
+				}
+				anims.add(ObjectAnimator.ofFloat(v, View.TRANSLATION_Z, isAtTop ? 0 : V.dp(3)));
+			}
+			if(fragmentRootLayout!=null){
+				int color;
+				if(isAtTop){
+					color=UiUtils.getThemeColor(context, R.attr.colorM3Background);
+				}else{
+					color=UiUtils.alphaBlendColors(UiUtils.getThemeColor(context, R.attr.colorM3Background), UiUtils.getThemeColor(context, R.attr.colorM3Primary), 0.07843137f);
+				}
+				anims.add(ObjectAnimator.ofArgb(fragmentRootLayout, "statusBarColor", color));
+			}
+			set.playTogether(anims);
+			set.setDuration(150);
+			set.setInterpolator(CubicBezierInterpolator.DEFAULT);
+			set.addListener(new AnimatorListenerAdapter(){
+				@Override
+				public void onAnimationEnd(Animator animation){
+					currentPanelsAnim=null;
+				}
+			});
+			set.start();
+			currentPanelsAnim=set;
+		}
+	}
+}