From c831ecc99d6d08cd3dfd3b9e90dc8d61222afb41 Mon Sep 17 00:00:00 2001
From: cketcham <cketcham@google.com>
Date: Fri, 4 Oct 2019 16:32:42 -0400
Subject: [PATCH] Add support for percentages to ShapeAppearanceModel

PiperOrigin-RevId: 272946740
(cherry picked from commit a130a0c3e048a6311ff70a5bcb7d50b1809f7251)
---
 .../material/chip/res/values/styles.xml       |  3 +-
 .../BaseMotionStrategy.java                   |  5 --
 .../ExtendedFloatingActionButton.java         | 73 ++++---------------
 .../FloatingActionButton.java                 | 13 +---
 .../FloatingActionButtonImpl.java             | 22 +-----
 .../FloatingActionButtonImplLollipop.java     |  3 -
 .../res/values/styles.xml                     | 10 ++-
 .../material/shape/MaterialShapeDrawable.java | 16 +++-
 .../material/shape/RelativeCornerSize.java    | 62 ++++++++++++++++
 .../material/shape/ShapeAppearanceModel.java  | 52 ++++++-------
 .../material/shape/res/values/attrs.xml       | 10 +--
 11 files changed, 132 insertions(+), 137 deletions(-)
 create mode 100644 lib/java/com/google/android/material/shape/RelativeCornerSize.java

diff --git a/lib/java/com/google/android/material/chip/res/values/styles.xml b/lib/java/com/google/android/material/chip/res/values/styles.xml
index fc8884792..f0184646b 100644
--- a/lib/java/com/google/android/material/chip/res/values/styles.xml
+++ b/lib/java/com/google/android/material/chip/res/values/styles.xml
@@ -71,8 +71,7 @@
   </style>
 
   <style name="ShapeAppearanceOverlay.MaterialComponents.Chip" parent="">
-    <!-- Replace with 50% -->
-    <item name="cornerSize">16dp</item>
+    <item name="cornerSize">50%</item>
   </style>
 
   <!-- Style for Chips that appear in text fields as a span.
diff --git a/lib/java/com/google/android/material/floatingactionbutton/BaseMotionStrategy.java b/lib/java/com/google/android/material/floatingactionbutton/BaseMotionStrategy.java
index 28489dea5..51d16c9f5 100644
--- a/lib/java/com/google/android/material/floatingactionbutton/BaseMotionStrategy.java
+++ b/lib/java/com/google/android/material/floatingactionbutton/BaseMotionStrategy.java
@@ -134,11 +134,6 @@ abstract class BaseMotionStrategy implements MotionStrategy {
       animators.add(spec.getAnimator("height", fab, ExtendedFloatingActionButton.HEIGHT));
     }
 
-    if (spec.hasPropertyValues("cornerRadius") && fab.isUsingPillCorner()) {
-      animators
-          .add(spec.getAnimator("cornerRadius", fab, ExtendedFloatingActionButton.CORNER_RADIUS));
-    }
-
     AnimatorSet set = new AnimatorSet();
     AnimatorSetCompat.playTogether(set, animators);
     return set;
diff --git a/lib/java/com/google/android/material/floatingactionbutton/ExtendedFloatingActionButton.java b/lib/java/com/google/android/material/floatingactionbutton/ExtendedFloatingActionButton.java
index c6b26e5da..c266c34e1 100644
--- a/lib/java/com/google/android/material/floatingactionbutton/ExtendedFloatingActionButton.java
+++ b/lib/java/com/google/android/material/floatingactionbutton/ExtendedFloatingActionButton.java
@@ -26,6 +26,7 @@ import android.animation.PropertyValuesHolder;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
+import android.graphics.RectF;
 import androidx.annotation.AnimatorRes;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -48,7 +49,7 @@ import com.google.android.material.animation.MotionSpec;
 import com.google.android.material.bottomsheet.BottomSheetBehavior;
 import com.google.android.material.internal.DescendantOffsetUtils;
 import com.google.android.material.internal.ThemeEnforcement;
-import com.google.android.material.shape.MaterialShapeDrawable;
+import com.google.android.material.shape.CornerSize;
 import com.google.android.material.shape.ShapeAppearanceModel;
 import java.util.List;
 
@@ -89,7 +90,6 @@ public class ExtendedFloatingActionButton extends MaterialButton implements Atta
   @NonNull private final Behavior<ExtendedFloatingActionButton> behavior;
 
   private boolean isExtended = true;
-  private boolean isUsingPillCorner = true;
 
   /**
    * Callback to be invoked when the visibility or the state of an ExtendedFloatingActionButton
@@ -200,7 +200,17 @@ public class ExtendedFloatingActionButton extends MaterialButton implements Atta
 
     ShapeAppearanceModel shapeAppearanceModel =
         ShapeAppearanceModel.builder(
-                context, attrs, defStyleAttr, DEF_STYLE_RES, ShapeAppearanceModel.PILL)
+                context,
+                attrs,
+                defStyleAttr,
+                DEF_STYLE_RES,
+                // TODO(b/121352029): Use ShapeAppearanceModel.PILL once this bug is fixed.
+                new CornerSize() {
+                  @Override
+                  public float getCornerSize(@NonNull RectF bounds) {
+                    return getAdjustedRadius((int) bounds.height());
+                  }
+                })
             .build();
     setShapeAppearanceModel(shapeAppearanceModel);
   }
@@ -215,45 +225,12 @@ public class ExtendedFloatingActionButton extends MaterialButton implements Atta
     }
   }
 
-  @Override
-  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-
-    if (isUsingPillCorner) {
-      setShapeAppearanceModel(createPillCornerShapeAppearance());
-    }
-  }
-
   @NonNull
   @Override
   public Behavior<ExtendedFloatingActionButton> getBehavior() {
     return behavior;
   }
 
-  @Override
-  public void setShapeAppearanceModel(@NonNull ShapeAppearanceModel shapeAppearanceModel) {
-    if (shapeAppearanceModel.isUsingPillCorner()) {
-      isUsingPillCorner = true;
-      shapeAppearanceModel = createPillCornerShapeAppearance();
-    }
-    super.setShapeAppearanceModel(shapeAppearanceModel);
-  }
-
-  @NonNull
-  private ShapeAppearanceModel createPillCornerShapeAppearance() {
-    return getShapeAppearanceModel().withCornerRadius(getAdjustedRadius(getMeasuredHeight()));
-  }
-
-  @Override
-  public void setCornerRadius(int cornerRadius) {
-    isUsingPillCorner = cornerRadius == ShapeAppearanceModel.PILL;
-    if (isUsingPillCorner) {
-      cornerRadius = getAdjustedRadius(getMeasuredHeight());
-    } else if (cornerRadius < 0) {
-      cornerRadius = 0;
-    }
-    super.setCornerRadius(cornerRadius);
-  }
 
   /**
    * Extends or shrinks the fab depending on the value of {@param extended}.
@@ -554,10 +531,6 @@ public class ExtendedFloatingActionButton extends MaterialButton implements Atta
     setShrinkMotionSpec(MotionSpec.createFromResource(getContext(), id));
   }
 
-  boolean isUsingPillCorner() {
-    return isUsingPillCorner;
-  }
-
   private void performMotion(
       @NonNull final MotionStrategy strategy, @Nullable final OnChangedCallback callback) {
     if (strategy.shouldCancel()) {
@@ -667,26 +640,6 @@ public class ExtendedFloatingActionButton extends MaterialButton implements Atta
         }
       };
 
-  /**
-   * A Property wrapper around the <code>cornerRadius</code> functionality handled by the {@link
-   * ExtendedFloatingActionButton#setCornerRadius(int)} and {@link
-   * ExtendedFloatingActionButton#getCornerRadius()} methods.
-   */
-  static final Property<View, Float> CORNER_RADIUS =
-      new Property<View, Float>(Float.class, "cornerRadius") {
-        @Override
-        public void set(@NonNull View object, @NonNull Float value) {
-          ExtendedFloatingActionButton efab = ((ExtendedFloatingActionButton) object);
-          efab.setShapeAppearanceModel(
-              efab.getShapeAppearanceModel().withCornerRadius(value.intValue()));
-        }
-
-        @Override
-        public Float get(@NonNull View object) {
-          return ((MaterialShapeDrawable) object.getBackground()).getTopRightCornerResolvedSize();
-        }
-      };
-
   /**
    * Returns an adjusted radius value that corrects any rounding errors.
    *
diff --git a/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButton.java b/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButton.java
index 667d8160d..545d660ac 100644
--- a/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButton.java
+++ b/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButton.java
@@ -76,7 +76,6 @@ import com.google.android.material.internal.ViewUtils;
 import com.google.android.material.internal.VisibilityAwareImageButton;
 import com.google.android.material.resources.MaterialResources;
 import com.google.android.material.shadow.ShadowViewDelegate;
-import com.google.android.material.shape.AbsoluteCornerSize;
 import com.google.android.material.shape.ShapeAppearanceModel;
 import com.google.android.material.shape.Shapeable;
 import com.google.android.material.stateful.ExtendableSavedState;
@@ -245,7 +244,6 @@ public class FloatingActionButton extends VisibilityAwareImageButton
                 context, attrs, defStyleAttr, DEF_STYLE_RES, ShapeAppearanceModel.PILL)
             .build();
 
-    boolean usingDefaultCorner = isUsingDefaultCorner(shapeAppearance);
     boolean ensureMinTouchTargetSize = a
         .getBoolean(R.styleable.FloatingActionButton_ensureMinTouchTargetSize, false);
 
@@ -256,7 +254,7 @@ public class FloatingActionButton extends VisibilityAwareImageButton
 
     expandableWidgetHelper = new ExpandableWidgetHelper(this);
 
-    getImpl().setShapeAppearance(shapeAppearance, usingDefaultCorner);
+    getImpl().setShapeAppearance(shapeAppearance);
     getImpl()
         .initializeBackgroundDrawable(backgroundTint, backgroundTintMode, rippleColor, borderWidth);
     getImpl().setMinTouchTargetSize(minTouchTargetSize);
@@ -522,7 +520,7 @@ public class FloatingActionButton extends VisibilityAwareImageButton
   /** Sets the {@link ShapeAppearanceModel} for this {@link FloatingActionButton}. */
   @Override
   public void setShapeAppearanceModel(@NonNull ShapeAppearanceModel shapeAppearance) {
-    getImpl().setShapeAppearance(shapeAppearance, isUsingDefaultCorner(shapeAppearance));
+    getImpl().setShapeAppearance(shapeAppearance);
   }
 
   /** Returns the {@link ShapeAppearanceModel} for this {@link FloatingActionButton}. */
@@ -691,7 +689,6 @@ public class FloatingActionButton extends VisibilityAwareImageButton
     customSize = NO_CUSTOM_SIZE;
     if (size != this.size) {
       this.size = size;
-      getImpl().updateSize();
       requestLayout();
     }
   }
@@ -752,7 +749,6 @@ public class FloatingActionButton extends VisibilityAwareImageButton
 
     if (size != customSize) {
       customSize = size;
-      getImpl().updateSize();
       requestLayout();
     }
   }
@@ -1362,11 +1358,6 @@ public class FloatingActionButton extends VisibilityAwareImageButton
     getImpl().removeTransformationCallback(new TransformationCallbackWrapper(listener));
   }
 
-  private boolean isUsingDefaultCorner(@NonNull ShapeAppearanceModel shapeAppearance) {
-    return ((AbsoluteCornerSize) shapeAppearance.getTopRightCornerSize()).getCornerSize()
-        == ShapeAppearanceModel.PILL;
-  }
-
   class TransformationCallbackWrapper<T extends FloatingActionButton>
       implements InternalTransformationCallback {
 
diff --git a/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImpl.java b/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImpl.java
index 7783b892e..774c65416 100644
--- a/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImpl.java
+++ b/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImpl.java
@@ -86,7 +86,6 @@ class FloatingActionButtonImpl {
   @Nullable BorderDrawable borderDrawable;
   @Nullable Drawable contentBackground;
 
-  boolean usingDefaultCorner;
   boolean ensureMinTouchTargetSize;
   boolean shadowPaddingEnabled = true;
   float elevation;
@@ -305,14 +304,8 @@ class FloatingActionButtonImpl {
     }
   }
 
-  final void setShapeAppearance(
-      @NonNull ShapeAppearanceModel shapeAppearance, boolean usingDefaultCorner) {
-    if (usingDefaultCorner) {
-      shapeAppearance = shapeAppearance.withCornerRadius(view.getSizeDimension() / 2);
-    }
-
+  final void setShapeAppearance(@NonNull ShapeAppearanceModel shapeAppearance) {
     this.shapeAppearance = shapeAppearance;
-    this.usingDefaultCorner = usingDefaultCorner;
     if (shapeDrawable != null) {
       shapeDrawable.setShapeAppearanceModel(shapeAppearance);
     }
@@ -645,16 +638,6 @@ class FloatingActionButtonImpl {
     // Ignore pre-v21
   }
 
-  void updateSize() {
-    if (!usingDefaultCorner || shapeDrawable == null || shapeAppearance == null) {
-      // Leave shape appearance as is.
-      return;
-    }
-
-    setShapeAppearance(
-        shapeAppearance.withCornerRadius(view.getSizeDimension() / 2f), usingDefaultCorner);
-  }
-
   final void updatePadding() {
     Rect rect = tmpRect;
     getPadding(rect);
@@ -736,9 +719,6 @@ class FloatingActionButtonImpl {
 
   MaterialShapeDrawable createShapeDrawable() {
     ShapeAppearanceModel shapeAppearance = checkNotNull(this.shapeAppearance);
-    if (usingDefaultCorner) {
-      shapeAppearance = shapeAppearance.withCornerRadius(view.getSizeDimension() / 2f);
-    }
     return new MaterialShapeDrawable(shapeAppearance);
   }
 
diff --git a/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImplLollipop.java b/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImplLollipop.java
index cfd41907a..c58e7bb05 100644
--- a/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImplLollipop.java
+++ b/lib/java/com/google/android/material/floatingactionbutton/FloatingActionButtonImplLollipop.java
@@ -229,9 +229,6 @@ class FloatingActionButtonImplLollipop extends FloatingActionButtonImpl {
   @Override
   MaterialShapeDrawable createShapeDrawable() {
     ShapeAppearanceModel shapeAppearance = checkNotNull(this.shapeAppearance);
-    if (usingDefaultCorner) {
-      shapeAppearance = shapeAppearance.withCornerRadius(view.getSizeDimension() / 2f);
-    }
     return new AlwaysStatefulMaterialShapeDrawable(shapeAppearance);
   }
 
diff --git a/lib/java/com/google/android/material/floatingactionbutton/res/values/styles.xml b/lib/java/com/google/android/material/floatingactionbutton/res/values/styles.xml
index 4e9503d47..6a2ef6985 100644
--- a/lib/java/com/google/android/material/floatingactionbutton/res/values/styles.xml
+++ b/lib/java/com/google/android/material/floatingactionbutton/res/values/styles.xml
@@ -51,8 +51,7 @@
   </style>
 
   <style name="ShapeAppearanceOverlay.MaterialComponents.FloatingActionButton" parent="">
-    <!-- use @null to change to 50% programmatically. -->
-    <item name="cornerSize">@null</item>
+    <item name="cornerSize">50%</item>
   </style>
 
   <style name="Widget.MaterialComponents.ExtendedFloatingActionButton" parent="Widget.MaterialComponents.Button">
@@ -82,10 +81,15 @@
     <item name="iconTint">@color/mtrl_extended_fab_text_color_selector</item>
     <item name="rippleColor">@color/mtrl_extended_fab_ripple_color</item>
     <item name="shapeAppearanceOverlay">
-      @style/ShapeAppearanceOverlay.MaterialComponents.FloatingActionButton
+      @style/ShapeAppearanceOverlay.MaterialComponents.ExtendedFloatingActionButton
     </item>
   </style>
 
+  <style name="ShapeAppearanceOverlay.MaterialComponents.ExtendedFloatingActionButton" parent="">
+    <!-- TODO(b/121352029): ExtendedFloatingActionButton adds 1px to the height -->
+    <item name="cornerSize">@null</item>
+  </style>
+
   <style name="Widget.MaterialComponents.ExtendedFloatingActionButton.Icon" parent="Widget.MaterialComponents.ExtendedFloatingActionButton">
     <item name="android:gravity">start|center_vertical</item>
     <item name="android:paddingStart" tools:ignore="NewApi">
diff --git a/lib/java/com/google/android/material/shape/MaterialShapeDrawable.java b/lib/java/com/google/android/material/shape/MaterialShapeDrawable.java
index 2c48f7962..94c7da934 100644
--- a/lib/java/com/google/android/material/shape/MaterialShapeDrawable.java
+++ b/lib/java/com/google/android/material/shape/MaterialShapeDrawable.java
@@ -60,6 +60,7 @@ import android.util.AttributeSet;
 import com.google.android.material.color.MaterialColors;
 import com.google.android.material.elevation.ElevationOverlayProvider;
 import com.google.android.material.shadow.ShadowRenderer;
+import com.google.android.material.shape.ShapeAppearanceModel.CornerSizeUnaryOperator;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
@@ -1096,7 +1097,20 @@ public class MaterialShapeDrawable extends Drawable implements TintAwareDrawable
   private void calculateStrokePath() {
     // Adjust corner radius in order to draw the stroke so that the corners of the background are
     // drawn on top of the edges.
-    strokeShapeAppearance = getShapeAppearanceModel().withAdjustedCorners(-getStrokeInsetLength());
+    strokeShapeAppearance =
+        getShapeAppearanceModel()
+            .withTransformedCornerSizes(
+                new CornerSizeUnaryOperator() {
+                  @NonNull
+                  @Override
+                  public CornerSize apply(@NonNull CornerSize cornerSize) {
+                    // Don't adjust for relative corners they will change by themselves when the
+                    // bounds change.
+                    return cornerSize instanceof RelativeCornerSize
+                        ? cornerSize
+                        : new AdjustedCornerSize(-getStrokeInsetLength(), cornerSize);
+                  }
+                });
 
     pathProvider.calculatePath(
         strokeShapeAppearance,
diff --git a/lib/java/com/google/android/material/shape/RelativeCornerSize.java b/lib/java/com/google/android/material/shape/RelativeCornerSize.java
new file mode 100644
index 000000000..8623d8685
--- /dev/null
+++ b/lib/java/com/google/android/material/shape/RelativeCornerSize.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.material.shape;
+
+import android.graphics.RectF;
+import androidx.annotation.NonNull;
+import java.util.Arrays;
+
+/**
+ * A {@link CornerSize} that takes a percent and computes the size used based on the height of the
+ * shape.
+ */
+public final class RelativeCornerSize implements CornerSize {
+
+  private final float percent;
+
+  public RelativeCornerSize(float percent) {
+    this.percent = percent;
+  }
+
+  /** Returns the relative percent used for this {@link CornerSize} */
+  public float getRelativePercent() {
+    return percent;
+  }
+
+  @Override
+  public float getCornerSize(@NonNull RectF bounds) {
+    return percent * bounds.height();
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (!(o instanceof RelativeCornerSize)) {
+      return false;
+    }
+    RelativeCornerSize that = (RelativeCornerSize) o;
+    return percent == that.percent;
+  }
+
+  @Override
+  public int hashCode() {
+    Object[] hashedFields = {percent};
+    return Arrays.hashCode(hashedFields);
+  }
+}
diff --git a/lib/java/com/google/android/material/shape/ShapeAppearanceModel.java b/lib/java/com/google/android/material/shape/ShapeAppearanceModel.java
index 555a92d72..107d0c53c 100644
--- a/lib/java/com/google/android/material/shape/ShapeAppearanceModel.java
+++ b/lib/java/com/google/android/material/shape/ShapeAppearanceModel.java
@@ -413,15 +413,6 @@ public class ShapeAppearanceModel {
       return this;
     }
 
-    /** Adjusts all the corners by the offset. */
-    @NonNull
-    public Builder adjustCorners(@Dimension float offset) {
-      return setTopLeftCornerSize(new AdjustedCornerSize(offset, topLeftCornerSize))
-          .setTopRightCornerSize(new AdjustedCornerSize(offset, topRightCornerSize))
-          .setBottomRightCornerSize(new AdjustedCornerSize(offset, bottomRightCornerSize))
-          .setBottomLeftCornerSize(new AdjustedCornerSize(offset, bottomLeftCornerSize));
-    }
-
     /** Pulls the corner size from specific CornerTreatments for backwards compatibility */
     private static float compatCornerTreatmentSize(CornerTreatment treatment) {
       if (treatment instanceof RoundedCornerTreatment) {
@@ -563,13 +554,15 @@ public class ShapeAppearanceModel {
       // floats.
       return new AbsoluteCornerSize(
           TypedValue.complexToDimensionPixelSize(value.data, a.getResources().getDisplayMetrics()));
+    } else if (value.type == TypedValue.TYPE_FRACTION) {
+      return new RelativeCornerSize(value.getFraction(1.0f, 1.0f));
     } else {
       return defaultValue;
     }
   }
 
   // Constant corner radius value to indicate that shape should use 50% height corner radii
-  public static final Integer PILL = -1;
+  public static final CornerSize PILL = new RelativeCornerSize(0.5f);
 
   CornerTreatment topLeftCorner;
   CornerTreatment topRightCorner;
@@ -739,18 +732,6 @@ public class ShapeAppearanceModel {
     return bottomEdge;
   }
 
-  /** Checks if all four corners of this ShapeAppearanceModel are of size {@link #PILL}. */
-  public boolean isUsingPillCorner() {
-    return isCornerPill(getTopRightCornerSize())
-        && isCornerPill(getTopLeftCornerSize())
-        && isCornerPill(getBottomLeftCornerSize())
-        && isCornerPill(getBottomRightCornerSize());
-  }
-
-  private boolean isCornerPill(CornerSize cornerSize) {
-    return ((AbsoluteCornerSize) cornerSize).getCornerSize() == PILL;
-  }
-
   /** Returns a builder with the edges and corners from this {@link ShapeAppearanceModel} */
   @NonNull
   public Builder toBuilder() {
@@ -772,12 +753,31 @@ public class ShapeAppearanceModel {
   }
 
   /**
-   * Returns a copy of this {@link ShapeAppearanceModel} with the same edges and corners, but with
-   * the corner radius for all corners offset by an adjustment.
+   * A UnaryOperator that takes and returns a CornerSize.
+   *
+   * @hide
    */
+  @RestrictTo(LIBRARY_GROUP)
+  public interface CornerSizeUnaryOperator {
+    @NonNull
+    CornerSize apply(@NonNull CornerSize cornerSize);
+  }
+
+  /**
+   * Returns a copy of this {@link ShapeAppearanceModel} with the same edges and corners, but with
+   * the corner radius for all corners converted by a {@link CornerSizeUnaryOperator}.
+   *
+   * @hide
+   */
+  @RestrictTo(LIBRARY_GROUP)
   @NonNull
-  public ShapeAppearanceModel withAdjustedCorners(float offset) {
-    return toBuilder().adjustCorners(offset).build();
+  public ShapeAppearanceModel withTransformedCornerSizes(@NonNull CornerSizeUnaryOperator op) {
+    return toBuilder()
+        .setTopLeftCornerSize(op.apply(getTopLeftCornerSize()))
+        .setTopRightCornerSize(op.apply(getTopLeftCornerSize()))
+        .setBottomLeftCornerSize(op.apply(getBottomLeftCornerSize()))
+        .setBottomRightCornerSize(op.apply(getBottomLeftCornerSize()))
+        .build();
   }
 
   /**
diff --git a/lib/java/com/google/android/material/shape/res/values/attrs.xml b/lib/java/com/google/android/material/shape/res/values/attrs.xml
index e35ec3bf2..0d6a67e8d 100644
--- a/lib/java/com/google/android/material/shape/res/values/attrs.xml
+++ b/lib/java/com/google/android/material/shape/res/values/attrs.xml
@@ -26,15 +26,15 @@
 
   <declare-styleable name="ShapeAppearance">
     <!-- Corner size to be used in the ShapeAppearance. All corners default to this value -->
-    <attr name="cornerSize" format="dimension"/>
+    <attr name="cornerSize" format="dimension|fraction"/>
     <!-- Top left corner size to be used in the ShapeAppearance. -->
-    <attr name="cornerSizeTopLeft" format="dimension"/>
+    <attr name="cornerSizeTopLeft" format="dimension|fraction"/>
     <!-- Top right corner size to be used in the ShapeAppearance. -->
-    <attr name="cornerSizeTopRight" format="dimension"/>
+    <attr name="cornerSizeTopRight" format="dimension|fraction"/>
     <!-- Bottom right corner size to be used in the ShapeAppearance. -->
-    <attr name="cornerSizeBottomRight" format="dimension"/>
+    <attr name="cornerSizeBottomRight" format="dimension|fraction"/>
     <!-- Bottom left corner size to be used in the ShapeAppearance. -->
-    <attr name="cornerSizeBottomLeft" format="dimension"/>
+    <attr name="cornerSizeBottomLeft" format="dimension|fraction"/>
 
     <!-- Corner family to be used in the ShapeAppearance. All corners default to this value -->
     <attr name="cornerFamily" format="enum">