1 // Copyright 2018 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/android/compositor/scene_layer/scrolling_bottom_view_scene_layer.h"
6
7 #include "base/android/jni_android.h"
8 #include "base/android/jni_array.h"
9 #include "cc/layers/ui_resource_layer.h"
10 #include "chrome/android/chrome_jni_headers/ScrollingBottomViewSceneLayer_jni.h"
11 #include "ui/android/resources/resource_manager_impl.h"
12
13 using base::android::JavaParamRef;
14 using base::android::JavaRef;
15
16 namespace android {
17
ScrollingBottomViewSceneLayer(JNIEnv * env,const JavaRef<jobject> & jobj)18 ScrollingBottomViewSceneLayer::ScrollingBottomViewSceneLayer(
19 JNIEnv* env,
20 const JavaRef<jobject>& jobj)
21 : SceneLayer(env, jobj),
22 should_show_background_(false),
23 background_color_(SK_ColorWHITE),
24 view_container_(cc::Layer::Create()),
25 view_layer_(cc::UIResourceLayer::Create()) {
26 layer()->SetIsDrawable(true);
27
28 view_container_->SetIsDrawable(true);
29 view_container_->SetMasksToBounds(true);
30
31 view_layer_->SetIsDrawable(true);
32 view_container_->AddChild(view_layer_);
33 }
34
35 ScrollingBottomViewSceneLayer::~ScrollingBottomViewSceneLayer() = default;
36
UpdateScrollingBottomViewLayer(JNIEnv * env,const JavaParamRef<jobject> & object,const JavaParamRef<jobject> & jresource_manager,jint view_resource_id,jint shadow_height,jfloat x_offset,jfloat y_offset,bool show_shadow)37 void ScrollingBottomViewSceneLayer::UpdateScrollingBottomViewLayer(
38 JNIEnv* env,
39 const JavaParamRef<jobject>& object,
40 const JavaParamRef<jobject>& jresource_manager,
41 jint view_resource_id,
42 jint shadow_height,
43 jfloat x_offset,
44 jfloat y_offset,
45 bool show_shadow) {
46 ui::ResourceManager* resource_manager =
47 ui::ResourceManagerImpl::FromJavaObject(jresource_manager);
48 ui::Resource* bottom_view_resource = resource_manager->GetResource(
49 ui::ANDROID_RESOURCE_TYPE_DYNAMIC, view_resource_id);
50
51 // If the resource isn't available, don't bother doing anything else.
52 if (!bottom_view_resource)
53 return;
54
55 view_layer_->SetUIResourceId(bottom_view_resource->ui_resource()->id());
56
57 int container_height = bottom_view_resource->size().height();
58 int texture_y_offset = 0;
59
60 // The view container layer's height depends on whether the shadow is
61 // showing. If the shadow should be clipped, reduce the height of the
62 // container.
63 if (!show_shadow) {
64 container_height -= shadow_height;
65 texture_y_offset -= shadow_height;
66 }
67
68 view_container_->SetBounds(
69 gfx::Size(bottom_view_resource->size().width(), container_height));
70 view_container_->SetPosition(gfx::PointF(0, y_offset - container_height));
71
72 // The view's layer should be the same size as the texture.
73 view_layer_->SetBounds(gfx::Size(bottom_view_resource->size().width(),
74 bottom_view_resource->size().height()));
75 view_layer_->SetPosition(gfx::PointF(x_offset, texture_y_offset));
76 }
77
SetContentTree(JNIEnv * env,const JavaParamRef<jobject> & jobj,const JavaParamRef<jobject> & jcontent_tree)78 void ScrollingBottomViewSceneLayer::SetContentTree(
79 JNIEnv* env,
80 const JavaParamRef<jobject>& jobj,
81 const JavaParamRef<jobject>& jcontent_tree) {
82 SceneLayer* content_tree = FromJavaObject(env, jcontent_tree);
83 if (!content_tree || !content_tree->layer())
84 return;
85
86 if (!content_tree->layer()->parent() ||
87 (content_tree->layer()->parent()->id() != layer_->id())) {
88 layer_->AddChild(content_tree->layer());
89 layer_->AddChild(view_container_);
90 }
91
92 // Propagate the background color up from the content layer.
93 should_show_background_ = content_tree->ShouldShowBackground();
94 background_color_ = content_tree->GetBackgroundColor();
95 }
96
GetBackgroundColor()97 SkColor ScrollingBottomViewSceneLayer::GetBackgroundColor() {
98 return background_color_;
99 }
100
ShouldShowBackground()101 bool ScrollingBottomViewSceneLayer::ShouldShowBackground() {
102 return should_show_background_;
103 }
104
JNI_ScrollingBottomViewSceneLayer_Init(JNIEnv * env,const JavaParamRef<jobject> & jobj)105 static jlong JNI_ScrollingBottomViewSceneLayer_Init(
106 JNIEnv* env,
107 const JavaParamRef<jobject>& jobj) {
108 // This will automatically bind to the Java object and pass ownership there.
109 ScrollingBottomViewSceneLayer* scene_layer =
110 new ScrollingBottomViewSceneLayer(env, jobj);
111 return reinterpret_cast<intptr_t>(scene_layer);
112 }
113
114 } // namespace android
115