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/js_canvas_gradient.h"
17
18 #include "bridge/declarative_frontend/jsview/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 if (controller->GetGradient()) {
36 delete controller->GetGradient();
37 }
38 controller->DecRefCount();
39 }
40 }
41
JSBind(BindingTarget globalObj)42 void JSCanvasGradient::JSBind(BindingTarget globalObj)
43 {
44 JSClass<JSCanvasGradient>::Declare("CanvasGradient");
45 JSClass<JSCanvasGradient>::CustomMethod("addColorStop", &JSCanvasGradient::addColorStop);
46 JSClass<JSCanvasGradient>::Bind(globalObj, JSCanvasGradient::Constructor, JSCanvasGradient::Destructor);
47 }
48
addColorStop(const JSCallbackInfo & info)49 void JSCanvasGradient::addColorStop(const JSCallbackInfo& info)
50 {
51 if (!isColorStopValid_ && gradient_->GetColors().empty()) {
52 isColorStopValid_ = true;
53 }
54 if (isColorStopValid_ && info[0]->IsNumber() && info[1]->IsString()) {
55 double offset = 0.0;
56 JSViewAbstract::ParseJsDouble(info[0], offset);
57 if (offset < 0 || offset > 1) {
58 isColorStopValid_ = false;
59 // if the offset is invalid, fill the shape with transparent
60 gradient_->ClearColors();
61 GradientColor color;
62 color.SetColor(Color::TRANSPARENT);
63 color.SetDimension(0.0);
64 gradient_->AddColor(color);
65 gradient_->AddColor(color);
66 return;
67 }
68 std::string jsColor;
69 GradientColor color;
70 JSViewAbstract::ParseJsString(info[1], jsColor);
71 Color colorFromString = Color::WHITE;
72 if (!Color::ParseColorString(jsColor, colorFromString)) {
73 gradient_ ->ClearColors();
74 color.SetColor(Color::TRANSPARENT);
75 color.SetDimension(0.0);
76 gradient_->AddColor(color);
77 gradient_->AddColor(color);
78 isColorStopValid_ = false;
79 return;
80 }
81 color.SetColor(colorFromString);
82 color.SetDimension(offset);
83 if (gradient_) {
84 gradient_->AddColor(color);
85 }
86 auto colorSize = gradient_->GetColors().size();
87 // prevent setting only one colorStop
88 if (colorSize == 1) {
89 gradient_->AddColor(color);
90 }
91 }
92 }
93
94 } // namespace OHOS::Ace::Framework
95