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193ab3757b
Factor out canvas parsing algorihtm for CanvasRenderingContext2DSettings from JS::Value. This was only used in one place but needs to be usable from other places too in the future.
56 lines
2.5 KiB
C++
56 lines
2.5 KiB
C++
/*
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* Copyright (c) 2025, Ladybird contributors
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* Copyright (c) 2025, Jelle Raaijmakers <jelle@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/FlyString.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/HTML/Canvas/CanvasSettings.h>
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// https://html.spec.whatwg.org/multipage/canvas.html#canvasrenderingcontext2dsettings
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JS::ThrowCompletionOr<Web::HTML::CanvasRenderingContext2DSettings> Web::HTML::CanvasRenderingContext2DSettings::from_js_value(JS::VM& vm, JS::Value value)
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{
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if (!value.is_nullish() && !value.is_object())
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return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "CanvasRenderingContext2DSettings");
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CanvasRenderingContext2DSettings settings;
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if (value.is_nullish())
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return settings;
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auto& value_object = value.as_object();
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JS::Value alpha = TRY(value_object.get("alpha"_fly_string));
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settings.alpha = alpha.is_undefined() ? true : alpha.to_boolean();
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JS::Value desynchronized = TRY(value_object.get("desynchronized"_fly_string));
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settings.desynchronized = desynchronized.is_undefined() ? false : desynchronized.to_boolean();
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JS::Value color_space = TRY(value_object.get("colorSpace"_fly_string));
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if (!color_space.is_undefined()) {
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auto color_space_string = TRY(color_space.to_string(vm));
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if (color_space_string == "srgb"sv)
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settings.color_space = Bindings::PredefinedColorSpace::Srgb;
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else if (color_space_string == "display-p3"sv)
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settings.color_space = Bindings::PredefinedColorSpace::DisplayP3;
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else
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return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, color_space_string, "colorSpace");
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}
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JS::Value color_type = TRY(value_object.get("colorType"_fly_string));
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if (!color_type.is_undefined()) {
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auto color_type_string = TRY(color_type.to_string(vm));
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if (color_type_string == "unorm8"sv)
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settings.color_type = Bindings::CanvasColorType::Unorm8;
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else if (color_type_string == "float16"sv)
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settings.color_type = Bindings::CanvasColorType::Float16;
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else
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return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, color_type_string, "colorType");
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}
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JS::Value will_read_frequently = TRY(value_object.get("willReadFrequently"_fly_string));
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settings.will_read_frequently = will_read_frequently.is_undefined() ? false : will_read_frequently.to_boolean();
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return settings;
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}
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