From c509e6815be8c283c14d0458ab9c5d231ff61e05 Mon Sep 17 00:00:00 2001
From: lanyill <lanyi3@huawei.com>
Date: Mon, 6 Jun 2022 16:42:33 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90ArkUI=E3=80=91=E3=80=90API9=E3=80=91In?=
 =?UTF-8?q?terpolate=E6=8E=A5=E5=8F=A3=E4=B8=8D=E5=8F=AF=E7=94=A8?=
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Signed-off-by: lanyill <lanyi3@huawei.com>
Change-Id: I833ef0cc31094f2ccc1659ff4324e78cf958509f
---
 api/@internal/component/ets/common.d.ts | 14 ++++++++-
 api/@ohos.curves.d.ts                   | 42 ++++++++++++++++++++++++-
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/api/@internal/component/ets/common.d.ts b/api/@internal/component/ets/common.d.ts
index d410c9d35a..5c1fc59a44 100644
--- a/api/@internal/component/ets/common.d.ts
+++ b/api/@internal/component/ets/common.d.ts
@@ -227,7 +227,7 @@ declare interface AnimateParam {
    * Animation curve.
    * @since 7
    */
-  curve?: Curve | string;
+  curve?: Curve | string | ICurve;
   /**
    * Animation playback mode. By default, the animation is played from the beginning after the playback is complete.
    * @since 7
@@ -250,6 +250,18 @@ declare interface AnimateParam {
   onFinish?: () => void;
 }
 
+/**
+ * Interface for curve object.
+ * @since 9
+ */
+interface ICurve {
+  /**
+   * Get curve value by fraction.
+   * @since 9
+   */ 
+  interpolate(fraction : number) : number;
+}
+
 /**
  * Defines the motion path options.
  * @since 7
diff --git a/api/@ohos.curves.d.ts b/api/@ohos.curves.d.ts
index e3a377d6ce..943381f939 100644
--- a/api/@ohos.curves.d.ts
+++ b/api/@ohos.curves.d.ts
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2021 Huawei Device Co., Ltd.
+* Copyright (c) 2021-2022 Huawei Device Co., Ltd.
 * 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
@@ -40,27 +40,67 @@ declare namespace curves {
     Friction,
   }
 
+  /**
+   * Interface for curve object.
+   * @since 9
+   */
+  interface ICurve {
+    /**
+    * Get curve value by fraction.
+    * @since 9
+    */ 
+     interpolate(fraction : number) : number;
+  }
+ 
+  /**
+   * Initializes the interpolator curve when called.
+   * @since 9
+   */
+  function initCurve(curve?: Curve): ICurve;
+
   /**
    * Initializes the interpolator curve when called.
    * @since 7
+   * @deprecated since 9
    */
   function init(curve?: Curve): string;
 
+  /**
+   * Constructs a step curve when called.
+   * @since 9
+   */
+  function stepsCurve(count: number, end: boolean): ICurve;
+
   /**
    * Constructs a step curve when called.
    * @since 7
+   * @deprecated since 9
    */
   function steps(count: number, end: boolean): string;
 
+  /**
+   * Constructs a third-order Bezier curve when called.
+   * @since 9
+   */
+  function cubicBezierCurve(x1: number, y1: number, x2: number, y2: number): ICurve;
+
   /**
    * Constructs a third-order Bezier curve when called.
    * @since 7
+   * @deprecated since 9
    */
   function cubicBezier(x1: number, y1: number, x2: number, y2: number): string;
 
+  /**
+   * Constructs a spring curve when called.
+   * @since 9
+   */
+  function springCurve(velocity: number, mass: number, stiffness: number, damping: number): ICurve;
+
   /**
    * Constructs a spring curve when called.
    * @since 7
+   * @deprecated since 9
    */
   function spring(velocity: number, mass: number, stiffness: number, damping: number): string;
 }
-- 
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