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LibCore: Add REGISTER_ENUM_PROPERTY macro

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This can be used to register a property that maps enum values to certain
strings, e.g.

    REGISTER_ENUM_PROPERTY(
        property_name, getter, setter, Enum,
        { Enum::Foo, "Foo" },
        { Enum::Bar, "Bar" });

Also use it for REGISTER_SIZE_POLICY_PROPERTY :^)
This commit is contained in:
Linus Groh 2020-12-28 12:58:21 +01:00 committed by Andreas Kling
parent c4991d969c
commit 6c0fa6ad93
Notes: sideshowbarker 2024-07-19 00:27:06 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/6c0fa6ad939
Pull-request: https://github.com/SerenityOS/serenity/pull/4626
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/devsh0
1 changed files with 36 additions and 21 deletions
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57
Libraries/LibCore/Object.h
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@ -268,26 +268,41 @@ const LogStream& operator<<(const LogStream&, const Object&);
return true; \
});
#define REGISTER_ENUM_PROPERTY(property_name, getter, setter, EnumType, ...) \
register_property( \
property_name, \
[this]() -> JsonValue { \
struct { \
EnumType enum_value; \
String string_value; \
} options[] = { __VA_ARGS__ }; \
auto enum_value = getter(); \
for (size_t i = 0; i < array_size(options); ++i) { \
auto& option = options[i]; \
if (enum_value == option.enum_value) \
return option.string_value; \
} \
return JsonValue(); \
}, \
[this](auto& value) { \
struct { \
EnumType enum_value; \
String string_value; \
} options[] = { __VA_ARGS__ }; \
auto string_value = value.as_string(); \
for (size_t i = 0; i < array_size(options); ++i) { \
auto& option = options[i]; \
if (string_value == option.string_value) { \
setter(option.enum_value); \
return true; \
} \
} \
return false; \
})
#define REGISTER_SIZE_POLICY_PROPERTY(property_name, getter, setter) \
register_property( \
property_name, [this]() -> JsonValue { \
auto policy = this->getter(); \
if (policy == GUI::SizePolicy::Fill) \
return "Fill"; \
if (policy == GUI::SizePolicy::Fixed) \
return "Fixed"; \
return JsonValue(); }, \
[this](auto& value) { \
if (!value.is_string()) \
return false; \
if (value.as_string() == "Fill") { \
setter(GUI::SizePolicy::Fill); \
return true; \
} \
if (value.as_string() == "Fixed") { \
setter(GUI::SizePolicy::Fixed); \
return true; \
} \
return false; \
});
REGISTER_ENUM_PROPERTY( \
property_name, getter, setter, GUI::SizePolicy, \
{ GUI::SizePolicy::Fill, "Fill" }, \
{ GUI::SizePolicy::Fixed, "Fixed" })
}