Feat selection anim v2

app/src/main/java/me/chan/texas/TexasViewDemoActivity.java

@@ -1,12 +1,16 @@
 package me.chan.texas;
 
 import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.graphics.Color;
 import android.graphics.Paint;
 
 import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 import android.util.TypedValue;
@@ -17,6 +21,7 @@
 import android.widget.Toast;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.content.ContextCompat;
 
@@ -27,9 +32,11 @@
 import me.chan.texas.renderer.TexasView;
 import me.chan.texas.renderer.TouchEvent;
 import me.chan.texas.renderer.selection.Selection;
+import me.chan.texas.renderer.ui.rv.anim.SegmentAnimType;
 import me.chan.texas.text.BreakStrategy;
 import me.chan.texas.text.Document;
 import me.chan.texas.text.Paragraph;
+import me.chan.texas.text.Segment;
 import me.chan.texas.utils.TexasUtils;
 
 public class TexasViewDemoActivity extends AppCompatActivity {
@@ -367,6 +374,32 @@ public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
 		renderOption.setTypeface(typeface);
 		mTexasView.refresh(renderOption);
 
+		mTexasView.setSegmentAnimator(new TexasView.SegmentAnimator() {
+
+			@Nullable
+			@Override
+			protected Animator onCreateAnimator(Segment segment, View itemView, SegmentAnimType type) {
+				if (segment.getTag() != SegmentAnimType.APPEARANCE || type != SegmentAnimType.APPEARANCE) {
+					return null;
+				}
+
+				Log.d("chan_debug", "onCreateAnimator: " + type + " -> " + segment);
+				AnimatorSet animatorSet = new AnimatorSet();
+				animatorSet.play(ObjectAnimator.ofFloat(itemView, "alpha", 0, 1))
+						.with(ObjectAnimator.ofFloat(itemView, "translationY", -itemView.getHeight(), 0));
+				animatorSet.setDuration(500);
+				animatorSet.addListener(new AnimatorListenerAdapter() {
+					@Override
+					public void onAnimationCancel(Animator animation) {
+						super.onAnimationCancel(animation);
+						itemView.setAlpha(1);
+						itemView.setTranslationY(0);
+					}
+				});
+				return animatorSet;
+			}
+		});
+
 		findViewById(me.chan.texas.debug.R.id.add_content).setOnClickListener(new View.OnClickListener() {
 			@Override
 			public void onClick(View v) {
@@ -375,8 +408,10 @@ public void onClick(View v) {
 					protected Document onRead(TexasOption option, @Nullable Document previousDocument) {
 						return new Document.Builder(previousDocument)
 								.addSegment(
+										0,
 										Paragraph.Builder.newBuilder(option)
-												.text("hello world")
+												.tag(SegmentAnimType.APPEARANCE)
+												.text("生活就像点菜，饥饿时菜会点得特别多，但吃一阵就会意识到浪费；如果慢条斯理地盘算怎么点菜，别人已经要吃完了。")
 												.build()
 								)
 								.build();
@@ -385,6 +420,9 @@ protected Document onRead(TexasOption option, @Nullable Document previousDocumen
 			}
 		});
 
+		Selection.Styles styles = Selection.Styles.create(Color.BLUE, Color.RED);
+		styles.enableFakeBold();
+
 		findViewById(me.chan.texas.debug.R.id.anim).setOnClickListener(v -> {
 			Selection selection = mTexasView.highlightParagraphs(new ParagraphPredicates() {
 				@Override
@@ -401,17 +439,20 @@ public boolean acceptParagraph(@Nullable Object paragraphTag) {
 				return;
 			}
 
+			int backgroundColor = styles.getBackgroundColor();
+			int textColor = styles.getTextColor();
+			float fakeBoldFactor = styles.getFakeBoldFactor();
 			ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1f);
 			valueAnimator.setDuration(3000);
 			valueAnimator.setRepeatCount(3);
 			selection.startAnimator(valueAnimator, new Selection.SelectionAnimatorListener() {
+				@RequiresApi(api = Build.VERSION_CODES.O)
 				@Override
 				protected void onUpdate(ValueAnimator animation, Selection.Styles styles) {
-					int backgroundColor = (int) styles.getBackgroundColor();
-					int textColor = styles.getTextColor();
 					float v = (float) animation.getAnimatedValue();
-					styles.setTextColor(Color.argb((int) (255 * v), Color.red(textColor), Color.green(textColor), Color.blue(textColor)));
-					styles.setBackgroundColor(Color.argb((int) (255 * v), Color.red(backgroundColor), Color.green(backgroundColor), Color.blue(backgroundColor)));
+					styles.setTextColor(Color.argb((int) (255 * v) /* 按需设置透明度 */, Color.red(textColor), Color.green(textColor), Color.blue(textColor)));
+					styles.setBackgroundColor(Color.argb((int) (255 * v) /* 按需设置透明度 */, Color.red(backgroundColor), Color.green(backgroundColor), Color.blue(backgroundColor)));
+					styles.setFakeBoldFactor(fakeBoldFactor * v);
 				}
 
 				@Override

app/src/main/res/layout/activity_paragraph.xml

@@ -74,7 +74,7 @@
             android:id="@+id/anim"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="动画" />
+            android:text="选中动画" />
     </LinearLayout>
 
     <FrameLayout

library/src/main/java/me/chan/texas/renderer/Renderer.java

@@ -546,4 +546,8 @@ public void smoothScrollBy(int dx, int dy) {
 	public SelectionMethod getSelectionMethod() {
 		return mSelectionMethod;
 	}
+
+	public void setSegmentAnimator(TexasView.SegmentAnimator segmentAnimator) {
+		mRecyclerView.setSegmentAnimator(segmentAnimator);
+	}
 }

library/src/main/java/me/chan/texas/renderer/TexasView.java

@@ -1,5 +1,6 @@
 package me.chan.texas.renderer;
 
+import android.animation.Animator;
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.res.Resources;
@@ -15,6 +16,7 @@
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.TypedValue;
+import android.view.View;
 import android.widget.FrameLayout;
 
 import androidx.annotation.AnyThread;
@@ -45,6 +47,7 @@
 import me.chan.texas.misc.PaintSet;
 import me.chan.texas.renderer.core.worker.LoadingWorker;
 import me.chan.texas.renderer.selection.Selection;
+import me.chan.texas.renderer.ui.rv.anim.SegmentAnimType;
 import me.chan.texas.source.Source;
 import me.chan.texas.text.BreakStrategy;
 import me.chan.texas.text.Document;
@@ -342,6 +345,14 @@ public void setSegmentDecoration(@NonNull SegmentDecoration segmentDecoration) {
 		mRenderer.setSegmentDecoration(segmentDecoration);
 	}
 
+	public void setSegmentAnimator(@NonNull SegmentAnimator segmentAnimator) {
+		if (mRenderer == null) {
+			return;
+		}
+
+		mRenderer.setSegmentAnimator(segmentAnimator);
+	}
+
 	private void load(String reason) {
 		if (mRenderer == null) {
 			return;
@@ -1046,6 +1057,23 @@ public interface SegmentDecoration {
 		void onDecorateSegment(int index, int count, Segment segment, Document document, Rect outRect);
 	}
 
+	public abstract static class SegmentAnimator {
+
+		public final Animator createAnimator(Segment segment, View itemView, SegmentAnimType type) {
+			return onCreateAnimator(segment, itemView, type);
+		}
+
+		/**
+		 * @param segment  segment
+		 * @param itemView itemView
+		 * @param type     type
+		 * @return Animator, 返回空则代表不显示动画
+		 */
+		@Nullable
+		protected abstract Animator onCreateAnimator(Segment segment, View itemView, SegmentAnimType type);
+	}
+
+
 	/**
 	 * Scroll state listener
 	 */

library/src/main/java/me/chan/texas/renderer/selection/ParagraphSelection.java

@@ -2,6 +2,8 @@
 
 import static androidx.annotation.RestrictTo.Scope.LIBRARY;
 
+import android.graphics.Paint;
+
 import androidx.annotation.MainThread;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -342,6 +344,7 @@ private static class InternalSelectionStyle extends TextStyle {
 		private int mTextColor = 0;
 		private Selection.Styles mStyles;
 		private int mBackgroundColor = 0;
+		private float mFakeBoldFactor = 0f;
 
 		public void reset(Selection.Styles styles) {
 			mStyles = styles;
@@ -350,11 +353,16 @@ public void reset(Selection.Styles styles) {
 		public void update() {
 			mTextColor = mStyles.getTextColor();
 			mBackgroundColor = mStyles.getBackgroundColor();
+			mFakeBoldFactor = mStyles.getFakeBoldFactor();
 		}
 
 		@Override
 		public void update(@NonNull TexasPaint textPaint, @Nullable Object tag) {
 			textPaint.setColor(mTextColor);
+			if (mFakeBoldFactor > 0f) {
+				textPaint.setStyle(Paint.Style.FILL_AND_STROKE);
+				textPaint.setStrokeWidth(textPaint.getTextSize() * mFakeBoldFactor);
+			}
 		}
 	}
 }

library/src/main/java/me/chan/texas/renderer/selection/Selection.java

@@ -363,6 +363,7 @@ public static Selection obtain(Type type, @Nullable TexasRecyclerView container,
 	public static class Styles {
 		private int mBackgroundColor;
 		private int mTextColor;
+		private float mFakeBoldFactor = 0f;
 
 		private Source mSource;
 
@@ -424,6 +425,21 @@ public void setTextColor(int textColor) {
 			mTextColor = textColor;
 		}
 
+		public void enableFakeBold() {
+			setFakeBoldFactor(0.05f);
+		}
+
+		public void setFakeBoldFactor(float fakeBoldFactor) {
+			if (mFakeBoldFactor != fakeBoldFactor) {
+				++mVersion;
+			}
+			mFakeBoldFactor = fakeBoldFactor;
+		}
+
+		public float getFakeBoldFactor() {
+			return mFakeBoldFactor;
+		}
+
 		@Override
 		public String toString() {
 			return "Styles{" +

library/src/main/java/me/chan/texas/renderer/ui/rv/SegmentItemDecoration.java

@@ -9,8 +9,10 @@
 import me.chan.texas.utils.TexasUtils;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.RestrictTo;
 import androidx.recyclerview.widget.RecyclerView;
 
+@RestrictTo(RestrictTo.Scope.LIBRARY)
 public class SegmentItemDecoration extends RecyclerView.ItemDecoration {
 	private final TexasRendererAdapter mAdapter;
 	private final me.chan.texas.misc.Rect mRect = new me.chan.texas.misc.Rect();

library/src/main/java/me/chan/texas/renderer/ui/rv/TexasRecyclerViewImpl.java

@@ -8,19 +8,18 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.RestrictTo;
 import androidx.recyclerview.widget.RecyclerView;
-import androidx.recyclerview.widget.SimpleItemAnimator;
 
 import static androidx.annotation.RestrictTo.Scope.LIBRARY;
 
-import me.chan.texas.R;
 import me.chan.texas.misc.Rect;
+import me.chan.texas.renderer.TexasView;
 import me.chan.texas.renderer.TouchEvent;
 import me.chan.texas.renderer.ui.TexasRendererAdapter;
+import me.chan.texas.renderer.ui.rv.anim.DefaultTexasItemAnimator;
 import me.chan.texas.renderer.ui.text.ParagraphView;
 import me.chan.texas.text.Document;
 import me.chan.texas.text.Paragraph;
 import me.chan.texas.text.Segment;
-import me.chan.texas.renderer.selection.SelectionProvider;
 import me.chan.texas.text.ViewSegment;
 import me.chan.texas.text.layout.Layout;
 
@@ -31,6 +30,7 @@ public class TexasRecyclerViewImpl extends RecyclerView implements TexasRecycler
 	private OnClickedListener mOnClickedListener;
 	private ScrollAction mScrollAction;
 	private final TexasLinearLayoutManagerImpl mTexasLinearLayoutManager;
+	private final DefaultTexasItemAnimator mItemAnimator = new DefaultTexasItemAnimator();
 
 	public TexasRecyclerViewImpl(@NonNull Context context, TexasLinearLayoutManagerImpl texasLinearLayoutManager) {
 		super(context);
@@ -48,12 +48,7 @@ protected void onClicked(MotionEvent event) {
 			}
 		};
 
-		ItemAnimator itemAnimator = getItemAnimator();
-		if (itemAnimator instanceof SimpleItemAnimator) {
-			SimpleItemAnimator simpleItemAnimator = (SimpleItemAnimator) itemAnimator;
-			simpleItemAnimator.setSupportsChangeAnimations(false);
-			simpleItemAnimator.setChangeDuration(0);
-		}
+		setItemAnimator(mItemAnimator);
 	}
 
 	public void scrollToPosition(int position, boolean smooth, int offset) {
@@ -86,6 +81,10 @@ public void getChildLocations(View child, Rect locations) {
 		locations.bottom = child.getBottom();
 	}
 
+	public void setSegmentAnimator(TexasView.SegmentAnimator segmentAnimator) {
+		mItemAnimator.setSegmentItemAnimator(segmentAnimator);
+	}
+
 	private class ScrollAction implements Runnable {
 		public int position;
 		public int offset;

library/src/main/java/me/chan/texas/renderer/ui/rv/anim/AnimRecord.java

@@ -0,0 +1,19 @@
+package me.chan.texas.renderer.ui.rv.anim;
+
+import android.animation.Animator;
+
+class AnimRecord {
+	public static final int PHASE_PENDING = 0;
+	public static final int PHASE_POSTPONED = 1;
+	public static final int PHASE_RUNNING = 2;
+
+	public final SegmentAnimType type;
+	public int phase;
+	public final Animator animator;
+
+	AnimRecord(SegmentAnimType type, Animator animator) {
+		this.type = type;
+		this.animator = animator;
+		this.phase = PHASE_PENDING;
+	}
+}

library/src/main/java/me/chan/texas/renderer/ui/rv/anim/AnimTracker.java

@@ -0,0 +1,50 @@
+package me.chan.texas.renderer.ui.rv.anim;
+
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+class AnimTracker {
+	private final HashMap<RecyclerView.ViewHolder, AnimRecord> mRecords = new HashMap<>();
+
+	public void add(RecyclerView.ViewHolder holder, AnimRecord record) {
+		mRecords.put(holder, record);
+	}
+
+	public boolean remove(RecyclerView.ViewHolder holder) {
+		return mRecords.remove(holder) != null;
+	}
+
+	@Nullable
+	public AnimRecord get(RecyclerView.ViewHolder holder) {
+		return mRecords.get(holder);
+	}
+
+	public void advanceTo(RecyclerView.ViewHolder holder, int phase) {
+		AnimRecord record = mRecords.get(holder);
+		if (record != null) {
+			record.phase = phase;
+		}
+	}
+
+	public List<RecyclerView.ViewHolder> holdersByPhase(int phase) {
+		List<RecyclerView.ViewHolder> result = new ArrayList<>();
+		for (HashMap.Entry<RecyclerView.ViewHolder, AnimRecord> entry : mRecords.entrySet()) {
+			if (entry.getValue().phase == phase) {
+				result.add(entry.getKey());
+			}
+		}
+		return result;
+	}
+
+	public List<RecyclerView.ViewHolder> allHolders() {
+		return new ArrayList<>(mRecords.keySet());
+	}
+
+	public boolean isEmpty() {
+		return mRecords.isEmpty();
+	}
+}