1 /*
2 * Copyright (c) 2021-2022 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/canvas/js_canvas_gradient.h"
17
18 #include "bridge/declarative_frontend/jsview/canvas/js_rendering_context.h"
19 #include "bridge/declarative_frontend/jsview/js_view_common_def.h"
20
21 namespace OHOS::Ace::Framework {
22
JSCanvasGradient()23 JSCanvasGradient::JSCanvasGradient() : isColorStopValid_(true) {}
24
Constructor(const JSCallbackInfo & args)25 void JSCanvasGradient::Constructor(const JSCallbackInfo& args)
26 {
27 auto jsCanvasGradient = Referenced::MakeRefPtr<JSCanvasGradient>();
28 jsCanvasGradient->IncRefCount();
29 args.SetReturnValue(Referenced::RawPtr(jsCanvasGradient));
30 }
31
Destructor(JSCanvasGradient * controller)32 void JSCanvasGradient::Destructor(JSCanvasGradient* controller)
33 {
34 if (controller != nullptr) {
35 controller->DecRefCount();
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 isColorStopValid_ = false;
56 // if the offset is invalid, fill the shape with transparent
57 gradient_->ClearColors();
58 GradientColor color;
59 color.SetColor(Color::TRANSPARENT);
60 color.SetDimension(0.0);
61 gradient_->AddColor(color);
62 gradient_->AddColor(color);
63 return;
64 }
65 std::string jsColor;
66 GradientColor color;
67 JSViewAbstract::ParseJsString(info[1], jsColor);
68 Color colorFromString = Color::WHITE;
69 if (!Color::ParseColorString(jsColor, colorFromString)) {
70 gradient_->ClearColors();
71 color.SetColor(Color::TRANSPARENT);
72 color.SetDimension(0.0);
73 gradient_->AddColor(color);
74 gradient_->AddColor(color);
75 isColorStopValid_ = false;
76 return;
77 }
78 color.SetColor(colorFromString);
79 color.SetDimension(offset);
80 if (gradient_) {
81 gradient_->AddColor(color);
82 }
83 auto colorSize = gradient_->GetColors().size();
84 // prevent setting only one colorStop
85 if (colorSize == 1) {
86 gradient_->AddColor(color);
87 }
88 }
89 }
90
91 } // namespace OHOS::Ace::Framework
92