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 #include "core/pipeline/base/sole_child_element.h"
17
18 #include "base/log/log.h"
19 #include "base/utils/macros.h"
20 #include "core/pipeline/base/sole_child_component.h"
21 #include "core/components/grid_layout/grid_layout_item_component.h"
22 #include "core/components_v2/list/list_item_component.h"
23
24 namespace OHOS::Ace {
25
Create()26 RefPtr<Element> SoleChildElement::Create()
27 {
28 return AceType::MakeRefPtr<SoleChildElement>();
29 }
30
PerformBuild()31 void SoleChildElement::PerformBuild()
32 {
33 RefPtr<SoleChildComponent> component = AceType::DynamicCast<SoleChildComponent>(component_);
34 if (!component) {
35 LOGW("Should be sole child component, but %s", AceType::TypeName(component_));
36 return;
37 }
38 const auto& child = children_.empty() ? nullptr : children_.front();
39 UpdateChild(child, component->GetChild());
40 }
41
42 // special handling for noGridItem, ListItem
43 // whose 'wrapping' component are descendants, not ancestors
LocalizedUpdateWithItemComponent(const RefPtr<Component> & innerMostWrappingComponent,const RefPtr<Component> & mainComponent)44 void SoleChildElement::LocalizedUpdateWithItemComponent(
45 const RefPtr<Component>& innerMostWrappingComponent, const RefPtr<Component>& mainComponent)
46 {
47 ACE_DCHECK(((AceType::DynamicCast<V2::ListItemComponent>(mainComponent) != nullptr) ||
48 (AceType::DynamicCast<GridLayoutItemComponent>(mainComponent) != nullptr)) &&
49 CanUpdate(mainComponent));
50
51 RefPtr<Element> updateElement = AceType::Claim(this);
52 auto updateComponent = mainComponent;
53
54 for (;;) {
55 updateElement->SetNewComponent(updateComponent);
56 updateElement->LocalizedUpdate(); // virtual
57 updateElement->SetNewComponent(nullptr);
58
59 updateElement = updateElement->GetFirstChild();
60 auto sc = AceType::DynamicCast<SingleChild>(updateComponent);
61 if ((updateElement == nullptr) || (sc == nullptr) || (sc->GetChild() == nullptr)) {
62 break;
63 }
64 updateComponent = sc->GetChild();
65 }
66 }
67
68 } // namespace OHOS::Ace
69