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Add set_global_callback in the C++ interpreter API

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Olivier Goffart 2021-08-27 10:53:40 +02:00 • committed by Olivier Goffart
parent a294ab4200
commit 0fad27e23e
3 changed files with 105 additions and 20 deletions
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39
api/sixtyfps-cpp/include/sixtyfps_interpreter.h
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@ -687,7 +687,7 @@ public:
/// ```
/// callback foo(string, int) -> string;
/// ```
/// Then one can call it with this function
/// Then one can set the callback handler with this function
/// ```
/// instance->set_callback("foo", [](auto args) {
/// std::cout << "foo(" << *args[0].to_string() << ", " << *args[1].to_number() << ")\n";
@ -721,7 +721,8 @@ public:
/// Returns true if the property was correctly set. Returns false if the property
/// could not be set because it either do not exist (was not declared in .60) or if
/// the value is not of the proper type for the property's type.
bool set_global_property(std::string_view global, std::string_view prop_name, const Value &value) const
bool set_global_property(std::string_view global, std::string_view prop_name,
const Value &value) const
{
using namespace cbindgen_private;
return sixtyfps_interpreter_component_instance_set_global_property(
@ -729,7 +730,8 @@ public:
sixtyfps::private_api::string_to_slice(prop_name), &value.inner);
}
/// Returns the value behind a property in a exported global.
std::optional<Value> get_global_property(std::string_view global, std::string_view prop_name) const
std::optional<Value> get_global_property(std::string_view global,
std::string_view prop_name) const
{
using namespace cbindgen_private;
ValueOpaque out;
@ -741,6 +743,37 @@ public:
return {};
}
}
/// Like `set_callback()` but on a callback in the specified exported global
///
/// Example: imagine the .60 file contains the given global:
/// ```60
/// export global Logic := {
/// callback to_uppercase(string) -> string;
/// }
/// ```
/// Then one can set the callback handler
/// ```cpp
/// instance->set_global_callback("Logic", "to_uppercase", [](auto args) {
/// std::string arg1(*args[0].to_string());
/// std::transform(arg1.begin(), arg1.end(), arg1.begin(), toupper);
/// return SharedString(arg1);
/// })
/// ```
template<typename F>
bool set_global_callback(std::string_view global, std::string_view name, F callback) const
{
using cbindgen_private::ValueOpaque;
auto actual_cb = [](void *data, Slice<ValueOpaque> arg, ValueOpaque *ret) {
Slice<Value> args_view { reinterpret_cast<Value *>(arg.ptr), arg.len };
Value r = (*reinterpret_cast<F *>(data))(args_view);
new (ret) Value(std::move(r));
};
return cbindgen_private::sixtyfps_interpreter_component_instance_set_global_callback(
inner(), sixtyfps::private_api::string_to_slice(global),
sixtyfps::private_api::string_to_slice(name), actual_cb, new F(std::move(callback)),
[](void *data) { delete reinterpret_cast<F *>(data); });
}
};
#if !defined(DOXYGEN)