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82bd3d3891
Prevents observably calling Trusted Types, which can run arbitrary JS, cause crashes due to use of MUST and allow arbitrary JS to modify internal elements.
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibGfx/Forward.h>
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#include <LibGfx/PaintingSurface.h>
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/WebIDL/Types.h>
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namespace Web::HTML {
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class HTMLCanvasElement final : public HTMLElement {
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WEB_PLATFORM_OBJECT(HTMLCanvasElement, HTMLElement);
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GC_DECLARE_ALLOCATOR(HTMLCanvasElement);
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public:
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using RenderingContext = Variant<GC::Root<CanvasRenderingContext2D>, GC::Root<WebGL::WebGLRenderingContext>, GC::Root<WebGL::WebGL2RenderingContext>, Empty>;
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virtual ~HTMLCanvasElement() override;
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Gfx::IntSize bitmap_size_for_canvas(size_t minimum_width = 0, size_t minimum_height = 0) const;
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JS::ThrowCompletionOr<RenderingContext> get_context(String const& type, JS::Value options);
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enum class HasOrCreatedContext {
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No,
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Yes,
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};
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JS::ThrowCompletionOr<HasOrCreatedContext> create_2d_context(JS::Value options);
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WebIDL::UnsignedLong width() const;
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WebIDL::UnsignedLong height() const;
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void set_width(WebIDL::UnsignedLong);
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void set_height(WebIDL::UnsignedLong);
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virtual void attribute_changed(FlyString const& local_name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_) override;
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String to_data_url(StringView type, JS::Value quality);
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WebIDL::ExceptionOr<void> to_blob(GC::Ref<WebIDL::CallbackType> callback, StringView type, JS::Value quality);
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RefPtr<Gfx::Bitmap> get_bitmap_from_surface();
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void present();
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RefPtr<Gfx::PaintingSurface> surface() const;
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void allocate_painting_surface_if_needed();
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private:
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HTMLCanvasElement(DOM::Document&, DOM::QualifiedName);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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virtual bool is_presentational_hint(FlyString const&) const override;
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virtual void apply_presentational_hints(GC::Ref<CSS::CascadedProperties>) const override;
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virtual GC::Ptr<Layout::Node> create_layout_node(GC::Ref<CSS::ComputedProperties>) override;
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virtual void adjust_computed_style(CSS::ComputedProperties&) override;
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template<typename ContextType>
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JS::ThrowCompletionOr<HasOrCreatedContext> create_webgl_context(JS::Value options);
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void reset_context_to_default_state();
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void notify_context_about_canvas_size_change();
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Variant<GC::Ref<HTML::CanvasRenderingContext2D>, GC::Ref<WebGL::WebGLRenderingContext>, GC::Ref<WebGL::WebGL2RenderingContext>, Empty> m_context;
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};
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}
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