From 29737596352ca6fc6f35af273de9879705a61daa Mon Sep 17 00:00:00 2001
From: wangweiyuan2 <wangweiyuan2@huawei.com>
Date: Thu, 11 Sep 2025 11:25:57 +0800
Subject: [PATCH] WinSizeLayoutBreakpoint

Signed-off-by: wangweiyuan2 <wangweiyuan2@huawei.com>
---
 api/@ohos.arkui.UIContext.d.ts | 70 ++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

diff --git a/api/@ohos.arkui.UIContext.d.ts b/api/@ohos.arkui.UIContext.d.ts
index 9278165b5b..6d8fc8eef3 100644
--- a/api/@ohos.arkui.UIContext.d.ts
+++ b/api/@ohos.arkui.UIContext.d.ts
@@ -1746,6 +1746,41 @@ export interface OverlayManagerOptions {
   enableBackPressedEvent?: boolean;
 }
 
+/**
+ * Defines the window size layout breakpoint information.
+ * This interface provides the current breakpoint classification of the window's width and height
+ * based on the configured breakpoint thresholds.
+ *
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @atomicservice
+ * @since 22
+ */
+export interface WindowSizeLayoutBreakPointInfo {
+  /**
+   * The width breakpoint classification of the current window.
+   * This value indicates which width category the window currently falls into based on
+   * the configured width breakpoint thresholds.
+   *
+   * @type { WidthBreakpoint }
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @atomicservice
+   * @since 22
+   */
+  widthBreakpoint: WidthBreakpoint;
+  
+  /**
+   * The height breakpoint classification of the current window.
+   * This value indicates which height category the window currently falls into based on
+   * the configured height breakpoint thresholds and aspect ratio.
+   *
+   * @type { HeightBreakpoint }
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @atomicservice
+   * @since 22
+   */
+  heightBreakpoint: HeightBreakpoint;
+}
+
 /**
  * Register callbacks to observe ArkUI behavior.
  * In the following API examples, you must first use getUIObserver() in UIContext to obtain a UIObserver instance, and
@@ -2533,6 +2568,41 @@ export declare class UIObserver {
    */
   off(type: 'nodeRenderState', nodeIdentity: NodeIdentity, callback?: NodeRenderStateChangeCallback): void;
 
+  /**
+ * Registers a callback function to be called when the window size layout breakpoint changes.
+ * This method allows observing changes in window size breakpoints which can be used to
+ * adapt UI layouts responsively based on window dimensions.
+ *
+ * @param { 'windowSizeLayoutBreakPointChange' } type - The type of event to listen for.
+ *        Must be 'windowSizeLayoutBreakPointChange'.
+ * @param { UIContext } context - The UIContext instance that specifies the scope of observation.
+ *        This parameter is used to determine which window/instance to observe.
+ * @param { Callback<WindowSizeLayoutBreakPointInfo> } callback - The callback function to be
+ *        called when the window size layout breakpoint changes. The callback receives a
+ *        {@link WindowSizeLayoutBreakPointInfo} object containing the current width and height
+ *        breakpoint classifications.
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @atomicservice
+ * @since 22
+ */
+on(type: 'windowSizeLayoutBreakPointChange', context: UIContext, callback: Callback<WindowSizeLayoutBreakPointInfo>): void;
+
+/**
+ * Removes a previously registered callback function for window size layout breakpoint changes.
+ * If no callback is provided, all callbacks for the specified context will be removed.
+ *
+ * @param { 'windowSizeLayoutBreakPointChange' } type - The type of event to remove the listener for.
+ *        Must be 'windowSizeLayoutBreakPointChange'.
+ * @param { UIContext } context - The UIContext instance that was used during registration.
+ *        This parameter specifies which context's listeners to remove.
+ * @param { Callback<WindowSizeLayoutBreakPointInfo> } [callback] - The specific callback function to remove.
+ *        If not provided, all callbacks for the given event type and context will be removed.
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @atomicservice
+ * @since 22
+ */
+off(type: 'windowSizeLayoutBreakPointChange', context: UIContext, callback?: Callback<WindowSizeLayoutBreakPointInfo>): void;
+
   /**
    * Registers a callback to monitor the gesture trigger information.
    *
-- 
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