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https://github.com/RGBCube/serenity
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b84f8fb55b
Some of these are allocated upon initialization of the intrinsics, and some lazily, but in neither case the getters actually return a nullptr. This saves us a whole bunch of pointer dereferences (as NonnullGCPtr has an `operator T&()`), and also has the interesting side effect of forcing us to explicitly use the FunctionObject& overload of call(), as passing a NonnullGCPtr is ambigous - it could implicitly be turned into a Value _or_ a FunctionObject& (so we have to dereference manually).
66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/ExceptionOrUtils.h>
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#include <LibWeb/Bindings/HTMLImageElementPrototype.h>
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#include <LibWeb/Bindings/ImageConstructor.h>
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#include <LibWeb/DOM/ElementFactory.h>
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#include <LibWeb/HTML/Scripting/Environments.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/Namespace.h>
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namespace Web::Bindings {
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ImageConstructor::ImageConstructor(JS::Realm& realm)
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: NativeFunction(realm.intrinsics().function_prototype())
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{
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}
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JS::ThrowCompletionOr<void> ImageConstructor::initialize(JS::Realm& realm)
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{
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auto& vm = this->vm();
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MUST_OR_THROW_OOM(NativeFunction::initialize(realm));
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define_direct_property(vm.names.prototype, &ensure_web_prototype<Bindings::HTMLImageElementPrototype>(realm, "HTMLImageElement"), 0);
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define_direct_property(vm.names.length, JS::Value(0), JS::Attribute::Configurable);
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return {};
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}
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JS::ThrowCompletionOr<JS::Value> ImageConstructor::call()
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{
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return vm().throw_completion<JS::TypeError>(JS::ErrorType::ConstructorWithoutNew, "Image");
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}
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// https://html.spec.whatwg.org/multipage/embedded-content.html#dom-image
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JS::ThrowCompletionOr<JS::NonnullGCPtr<JS::Object>> ImageConstructor::construct(FunctionObject&)
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{
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auto& vm = this->vm();
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// 1. Let document be the current global object's associated Document.
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auto& window = verify_cast<HTML::Window>(HTML::current_global_object());
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auto& document = window.associated_document();
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// 2. Let img be the result of creating an element given document, img, and the HTML namespace.
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auto image_element = TRY(Bindings::throw_dom_exception_if_needed(vm, [&]() { return DOM::create_element(document, HTML::TagNames::img, Namespace::HTML); }));
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// 3. If width is given, then set an attribute value for img using "width" and width.
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if (vm.argument_count() > 0) {
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u32 width = TRY(vm.argument(0).to_u32(vm));
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MUST(image_element->set_attribute(HTML::AttributeNames::width, DeprecatedString::formatted("{}", width)));
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}
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// 4. If height is given, then set an attribute value for img using "height" and height.
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if (vm.argument_count() > 1) {
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u32 height = TRY(vm.argument(1).to_u32(vm));
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MUST(image_element->set_attribute(HTML::AttributeNames::height, DeprecatedString::formatted("{}", height)));
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}
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// 5. Return img.
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return image_element;
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}
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}
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