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32 lines
1.4 KiB
Markdown
32 lines
1.4 KiB
Markdown
# Adding a new IDL file
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Serenity's build system does a lot of work of turning the IDL from a Web spec into code, but there are a few things you'll need to do yourself.
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For the sake of example, let's say you're wanting to add the `HTMLDetailsElement`.
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1. Create `LibWeb/HTML/HTMLDetailsElement.idl` with the contents of the IDL section of the spec. In this case, that would be:
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```webidl
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[Exposed=Window]
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interface HTMLDetailsElement : HTMLElement {
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[HTMLConstructor] constructor();
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[CEReactions] attribute boolean open;
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};
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```
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2. If the IDL refers to other IDL types, you need to import those. For example, `CSSRule` has an attribute that returns a `CSSStyleSheet`, so that needs to be imported:
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```webidl
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#import <CSS/CSSStyleSheet.idl>
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interface CSSRule {
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readonly attribute CSSStyleSheet? parentStyleSheet;
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};
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```
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3. Add a `libweb_js_bindings(HTML/HTMLDetailsElement)` call to [`LibWeb/idl_files.cmake`](../../Userland/Libraries/LibWeb/idl_files.cmake)
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4. Forward declare the generated class in [`LibWeb/Forward.h`](../../Userland/Libraries/LibWeb/Forward.h):
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- `HTMLDetailsElement` in its namespace.
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5. If your type isn't an Event or Element, you will need to add it to [`is_platform_object()`](../../Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp)
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so that it can be accepted as an IDL parameter, attribute or return type.
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