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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
1 changed files with 36 additions and 21 deletions
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47
Libraries/LibCore/Object.h
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@ -268,26 +268,41 @@ const LogStream& operator<<(const LogStream&, const Object&);
return true; \ return true; \
}); });
#define REGISTER_SIZE_POLICY_PROPERTY(property_name, getter, setter) \ #define REGISTER_ENUM_PROPERTY(property_name, getter, setter, EnumType, ...) \
register_property( \ register_property( \
property_name, [this]() -> JsonValue { \ property_name, \
auto policy = this->getter(); \ [this]() -> JsonValue { \
if (policy == GUI::SizePolicy::Fill) \ struct { \
return "Fill"; \ EnumType enum_value; \
if (policy == GUI::SizePolicy::Fixed) \ String string_value; \
return "Fixed"; \ } options[] = { __VA_ARGS__ }; \
return JsonValue(); }, \ 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) { \ [this](auto& value) { \
if (!value.is_string()) \ struct { \
return false; \ EnumType enum_value; \
if (value.as_string() == "Fill") { \ String string_value; \
setter(GUI::SizePolicy::Fill); \ } 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 true; \
} \ } \
if (value.as_string() == "Fixed") { \
setter(GUI::SizePolicy::Fixed); \
return true; \
} \ } \
return false; \ return false; \
}); })
#define REGISTER_SIZE_POLICY_PROPERTY(property_name, getter, setter) \
REGISTER_ENUM_PROPERTY( \
property_name, getter, setter, GUI::SizePolicy, \
{ GUI::SizePolicy::Fill, "Fill" }, \
{ GUI::SizePolicy::Fixed, "Fixed" })
} }