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 "bridge/declarative_frontend/jsview/js_canvas_gradient.h"
17 #include "bridge/declarative_frontend/jsview/js_rendering_context.h"
18 #include "bridge/declarative_frontend/jsview/js_view_common_def.h"
19
20 namespace OHOS::Ace::Framework {
21
JSCanvasGradient()22 JSCanvasGradient::JSCanvasGradient() : isColorStopValid_(true) {}
23
Constructor(const JSCallbackInfo & args)24 void JSCanvasGradient::Constructor(const JSCallbackInfo& args)
25 {
26 auto jsCanvasGradient = Referenced::MakeRefPtr<JSCanvasGradient>();
27 jsCanvasGradient->IncRefCount();
28 args.SetReturnValue(Referenced::RawPtr(jsCanvasGradient));
29 }
30
Destructor(JSCanvasGradient * controller)31 void JSCanvasGradient::Destructor(JSCanvasGradient* controller)
32 {
33 if (controller != nullptr) {
34 controller->DecRefCount();
35 delete controller->GetGradient();
36 }
37 }
38
JSBind(BindingTarget globalObj)39 void JSCanvasGradient::JSBind(BindingTarget globalObj)
40 {
41 JSClass<JSCanvasGradient>::Declare("CanvasGradient");
42 JSClass<JSCanvasGradient>::CustomMethod("addColorStop", &JSCanvasGradient::addColorStop);
43 JSClass<JSCanvasGradient>::Bind(globalObj, JSCanvasGradient::Constructor, JSCanvasGradient::Destructor);
44 }
45
addColorStop(const JSCallbackInfo & info)46 void JSCanvasGradient::addColorStop(const JSCallbackInfo& info)
47 {
48 if (!isColorStopValid_ && gradient_->GetColors().empty()) {
49 isColorStopValid_ = true;
50 }
51 if (isColorStopValid_ && info[0]->IsNumber() && info[1]->IsString()) {
52 double offset = 0.0;
53 JSViewAbstract::ParseJsDouble(info[0], offset);
54 if (offset < 0 || offset > 1) {
55 LOGE("offset not valid!");
56 isColorStopValid_ = false;
57 // if the offset is invalid, fill the shape with transparent
58 gradient_->ClearColors();
59 GradientColor color;
60 color.SetColor(Color::TRANSPARENT);
61 color.SetDimension(0.0);
62 gradient_->AddColor(color);
63 gradient_->AddColor(color);
64 return;
65 }
66 std::string jsColor;
67 GradientColor color;
68 JSViewAbstract::ParseJsString(info[1], jsColor);
69 color.SetColor(Color::FromString(jsColor));
70 color.SetDimension(offset);
71 if (gradient_) {
72 gradient_->AddColor(color);
73 }
74 auto colorSize = gradient_->GetColors().size();
75 // prevent setting only one colorStop
76 if (colorSize == 1) {
77 gradient_->AddColor(color);
78 }
79 }
80 }
81
82 } // namespace OHOS::Ace::Framework
83