refactor(AvatarSpan.java): add back the AvatarSpan class

mastodon/src/main/java/org/joinmastodon/android/ui/text/AvatarSpan.java

@@ -0,0 +1,51 @@
+package org.joinmastodon.android.ui.text;
+
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.text.style.ReplacementSpan;
+
+import org.joinmastodon.android.GlobalUserPreferences;
+import org.joinmastodon.android.model.Account;
+import org.joinmastodon.android.model.Emoji;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import me.grishka.appkit.imageloader.requests.UrlImageLoaderRequest;
+import me.grishka.appkit.utils.V;
+
+public class AvatarSpan extends CustomEmojiSpan{
+
+	public AvatarSpan(Account account){
+		//this is a hacky solution to allow loading of avatars in the middle of strings,
+		//using already existing code for loading emojis
+		super(new Emoji(account.avatarStatic, account.avatar, account.avatarStatic));
+	}
+
+	@Override
+	public void draw(@NonNull Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, @NonNull Paint paint){
+		//modified draw of a CustomEmojiSpan, drawing a circular image instead.
+		if(drawable==null)
+			return;
+		top += 4;
+		int size=Math.round(paint.descent()-paint.ascent());
+		Rect bounds=drawable.getBounds();
+		int dw=drawable.getIntrinsicWidth();
+		int dh=drawable.getIntrinsicHeight();
+		if(bounds.left!=0 || bounds.top!=0 || bounds.right!=dw || bounds.left!=dh){
+			drawable.setBounds(0, 0, dw, dh);
+		}
+		canvas.save();
+		float radius = size / 2f;
+		Path clipPath = new Path();
+		clipPath.addCircle(x + radius, top + radius, radius, Path.Direction.CW);
+		canvas.clipPath(clipPath);
+		canvas.translate(x, top);
+		canvas.scale(size/(float)dw, size/(float)dh, 0f, 0f);
+		drawable.draw(canvas);
+		canvas.restore();
+	}
+
+}