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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/canvas/canvas2d/v8_canvas_style.h"
#include "base/compiler_specific.h"
#include "third_party/blink/renderer/bindings/core/v8/idl_types.h"
#include "third_party/blink/renderer/bindings/core/v8/native_value_traits_impl.h"
#include "third_party/blink/renderer/bindings/core/v8/to_v8_traits.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_css_color_value.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_canvas_gradient.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_canvas_pattern.h"
#include "third_party/blink/renderer/core/css/cssom/css_color_value.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_gradient.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_pattern.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_style.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "v8/include/v8-local-handle.h"
#include "v8/include/v8-value.h"
namespace v8 {
class Isolate;
} // namespace v8
namespace blink {
bool ExtractV8CanvasStyle(v8::Isolate* isolate,
v8::Local<v8::Value> value,
V8CanvasStyle& style,
ExceptionState& exception_state) {
// Check for string first as it's the most common.
if (value->IsString()) {
style.string = NativeValueTraits<IDLString>::NativeValue(isolate, value,
exception_state);
if (exception_state.HadException()) [[unlikely]] {
return false;
}
style.type = V8CanvasStyleType::kString;
return true;
}
if (auto* pattern = V8CanvasPattern::ToWrappable(isolate, value)) {
style.pattern = pattern;
style.type = V8CanvasStyleType::kPattern;
return true;
}
if (auto* gradient = V8CanvasGradient::ToWrappable(isolate, value)) {
style.type = V8CanvasStyleType::kGradient;
style.gradient = gradient;
return true;
}
if (auto* color_value = V8CSSColorValue::ToWrappable(isolate, value)) {
style.type = V8CanvasStyleType::kCSSColorValue;
style.css_color_value = color_value->ToColor();
return true;
}
// This case also handles non-string types that may be converted to strings
// (such as numbers).
style.string = NativeValueTraits<IDLString>::NativeValue(isolate, value,
exception_state);
if (exception_state.HadException()) [[unlikely]] {
return false;
}
style.type = V8CanvasStyleType::kString;
return true;
}
v8::Local<v8::Value> CanvasStyleToV8(ScriptState* script_state,
const CanvasStyle& style) {
if (CanvasGradient* gradient = style.GetCanvasGradient()) {
return ToV8Traits<CanvasGradient>::ToV8(script_state, gradient);
}
if (CanvasPattern* pattern = style.GetCanvasPattern()) {
return ToV8Traits<CanvasPattern>::ToV8(script_state, pattern);
}
return ToV8Traits<IDLString>::ToV8(script_state, style.GetColorAsString());
}
} // namespace blink
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