1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef FRAMEWORKS_BRIDGE_DECLARATIVE_FRONTEND_JS_VIEW_JS_SCROLLER_H
17 #define FRAMEWORKS_BRIDGE_DECLARATIVE_FRONTEND_JS_VIEW_JS_SCROLLER_H
18 
19 #include "base/memory/referenced.h"
20 #include "bridge/declarative_frontend/engine/bindings.h"
21 #include "core/components/scroll/scroll_controller_base.h"
22 #include "core/components/scroll_bar/scroll_proxy.h"
23 
24 namespace OHOS::Ace::Framework {
25 
26 class JSScroller : public Referenced {
27 public:
28     JSScroller() = default;
29     ~JSScroller() override = default;
30 
31     static void JSBind(BindingTarget globalObj);
32     static void Constructor(const JSCallbackInfo& args);
33     static void Destructor(JSScroller* scroller);
34 
35     void ScrollTo(const JSCallbackInfo& args);
36     void ScrollEdge(const JSCallbackInfo& args);
37     void Fling(const JSCallbackInfo& args);
38     void ScrollPage(const JSCallbackInfo& args);
39     void CurrentOffset(const JSCallbackInfo& args);
40     void ScrollToIndex(const JSCallbackInfo& args);
41     void ScrollBy(const JSCallbackInfo& args);
42     void IsAtEnd(const JSCallbackInfo& args);
43     void GetItemRect(const JSCallbackInfo& args);
44     void GetItemIndex(const JSCallbackInfo& args);
45 
GetController() const46     const WeakPtr<ScrollControllerBase>& GetController() const
47     {
48         return controllerWeak_;
49     }
50 
SetController(const RefPtr<ScrollControllerBase>& controller)51     void SetController(const RefPtr<ScrollControllerBase>& controller)
52     {
53         auto oldController = controllerWeak_.Upgrade();
54         if (oldController) {
55             ScrollerObserver observer;
56             oldController->SetObserver(observer);
57         }
58         if (controller) {
59             controller->SetObserver(observer_);
60         }
61         controllerWeak_ = controller;
62     }
63 
SetScrollBarProxy(const RefPtr<ScrollProxy>& proxy)64     void SetScrollBarProxy(const RefPtr<ScrollProxy>& proxy)
65     {
66         scrollBarProxyWeak_ = proxy;
67     }
68 
GetScrollBarProxy()69     RefPtr<ScrollProxy> GetScrollBarProxy()
70     {
71         return scrollBarProxyWeak_.Upgrade();
72     }
73 
74     JSRef<JSObject> CreateRectangle(const Rect& info);
75 
SetInstanceId(int32_t instanceId)76     void SetInstanceId(int32_t instanceId)
77     {
78         instanceId_ = instanceId;
79     }
80 
GetInstanceId()81     int32_t GetInstanceId()
82     {
83         return instanceId_;
84     }
85 
SetObserver(const ScrollerObserver& observer)86     void SetObserver(const ScrollerObserver& observer)
87     {
88         observer_ = observer;
89         auto controller = controllerWeak_.Upgrade();
90         if (controller) {
91             controller->SetObserver(observer);
92         }
93     }
94 
95 private:
96     bool ParseCurveParams(RefPtr<Curve>& curve, const JSRef<JSVal>& jsValue);
97 
98     WeakPtr<ScrollControllerBase> controllerWeak_;
99     WeakPtr<ScrollProxy> scrollBarProxyWeak_;
100 
101     ACE_DISALLOW_COPY_AND_MOVE(JSScroller);
102 
103     int32_t instanceId_ = INSTANCE_ID_UNDEFINED;
104 
105     ScrollerObserver observer_;
106 };
107 
108 } // namespace OHOS::Ace::Framework
109 #endif // FRAMEWORKS_BRIDGE_DECLARATIVE_FRONTEND_JS_VIEW_JS_SCROLLER_H
110