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#include "inspect.hpp"
#include "compat/assert.hpp"
#include "compat/defs.hpp"
#include "entity/accessor.hpp"
#include "imgui-raii.hpp"
#include <cstdio>
#include <utility>
#include <Corrade/Containers/ArrayView.h>
#include <Corrade/Containers/String.h>
#include <Magnum/Math/Functions.h>
#include <Magnum/Math/Vector2.h>
#include <Magnum/Math/Vector3.h>
#include <Magnum/Math/Vector4.h>
#include <Magnum/Math/Color.h>
namespace floormat::entities {
namespace {
template<typename T> struct IGDT_;
template<> struct IGDT_<uint8_t> : std::integral_constant<int, ImGuiDataType_U8> {};
template<> struct IGDT_<int8_t> : std::integral_constant<int, ImGuiDataType_S8> {};
template<> struct IGDT_<uint16_t> : std::integral_constant<int, ImGuiDataType_U16> {};
template<> struct IGDT_<int16_t> : std::integral_constant<int, ImGuiDataType_S16> {};
template<> struct IGDT_<uint32_t> : std::integral_constant<int, ImGuiDataType_U32> {};
template<> struct IGDT_<int32_t> : std::integral_constant<int, ImGuiDataType_S32> {};
template<> struct IGDT_<uint64_t> : std::integral_constant<int, ImGuiDataType_U64> {};
template<> struct IGDT_<int64_t> : std::integral_constant<int, ImGuiDataType_S64> {};
template<> struct IGDT_<float> : std::integral_constant<int, ImGuiDataType_Float> {};
template<typename T> constexpr auto IGDT = IGDT_<T>::value;
template<typename T> requires std::is_integral_v<T> constexpr bool eqv(T a, T b) { return a == b; }
bool eqv(float a, float b) { return std::fabs(a - b) < 1e-8f; }
bool eqv(const String& a, const String& b) { return a == b; }
template<typename T, size_t N> constexpr bool eqv(const Math::Vector<N, T>& a, const Math::Vector<N, T>& b) { return a == b; }
int on_string_resize(ImGuiInputTextCallbackData* data)
{
if (data->EventFlag == ImGuiInputTextFlags_CallbackResize)
{
auto& str = *static_cast<String*>(data->UserData);
fm_assert(str.data() == data->Buf);
if ((size_t)data->BufSize > str.size()+1)
{
auto str2 = String{ValueInit, (size_t)data->BufSize};
str = move(str2);
data->Buf = str.data();
}
}
return 0;
}
using namespace imgui;
template<typename T>
bool do_inspect_field(void* datum, const erased_accessor& accessor, field_repr repr,
const ArrayView<const std::pair<StringView, size_t>>& list,
size_t label_width)
{
if (list.isEmpty())
fm_assert(accessor.check_field_type<T>());
fm_assert(!list.isEmpty() == (repr == field_repr::cbx));
char buf[128];
bool should_disable = false;
const auto enabled = accessor.is_enabled(datum);
fm_assert(enabled < field_status::COUNT);
switch (enabled)
{
using enum field_status;
case COUNT: fm_assert(false);
case hidden: return false;
case readonly: should_disable = true; break;
case enabled: should_disable = false; break;
}
should_disable = should_disable || !accessor.can_write();
[[maybe_unused]] auto disabler = begin_disabled(should_disable);
bool ret = false;
const char* const label = label_left(accessor.field_name, buf, (float)label_width);
T value{};
accessor.read_fun(datum, accessor.reader, &value);
auto orig = value;
if constexpr(std::is_same_v<T, StringView>)
ret = ImGui::InputText(label, const_cast<char*>(value.data()), value.size(), ImGuiInputTextFlags_ReadOnly);
else if constexpr(std::is_same_v<T, String>)
{
ret = ImGui::InputText(label, value.begin(), value.size()+1, ImGuiInputTextFlags_CallbackResize, on_string_resize, &value);
if (ret)
{
auto size = value.size();
if (auto ptr = value.find('\0')) // XXX hack
size = Math::min(size, (size_t)(ptr.data() - value.data()));
if (auto max_len = accessor.get_max_length(datum); value.size() > max_len)
size = Math::min(size, max_len.value);
if (size != value.size())
value = value.prefix(size);
}
}
else if constexpr(std::is_same_v<T, bool>)
ret = ImGui::Checkbox(label, &value);
else if constexpr (std::is_same_v<T, Color3ub>)
{
auto vec = Vector3(value) * (1.f/255);
ret = ImGui::ColorEdit3(label, vec.data());
value = Color3ub(vec * 255);
}
else if constexpr (std::is_same_v<T, Color4ub>)
{
auto vec = Vector4(value) * (1.f/255);
ret = ImGui::ColorEdit4(label, vec.data());
value = Color4ub(vec * 255);
}
else if constexpr (!Math::IsVector<T>())
{
auto [min, max] = accessor.get_range(datum).convert<T>();
constexpr auto igdt = IGDT<T>;
constexpr T step(!std::is_floating_point_v<T> ? T(1) : T(1.f)),
step2(!std::is_floating_point_v<T> ? T(10) : T(.25f));
switch (repr)
{
default: fm_warn_once("invalid repr enum value '%zu'", (size_t)repr); break;
case field_repr::input: ret = ImGui::InputScalar(label, igdt, &value, &step, &step2); break;
case field_repr::slider: ret = ImGui::SliderScalar(label, igdt, &value, &min, &max); break;
case field_repr::drag: ret = ImGui::DragScalar(label, igdt, &value, 1, &min, &max); break;
case field_repr::cbx: {
if constexpr(std::is_integral_v<T>)
{
StringView preview = "<invalid>"_s;
const auto old_value = (size_t)static_cast<std::make_unsigned_t<T>>(value);
for (const auto& [str, x] : list)
if (x == old_value)
{
preview = str;
break;
}
if (auto b = begin_combo(label, preview))
for (const auto& [str, x] : list)
{
const bool is_selected = x == (size_t)old_value;
if (ImGui::Selectable(str.data(), is_selected))
value = T(x), ret = true;
if (is_selected)
ImGui::SetItemDefaultFocus();
}
break;
}
}
}
value = Math::clamp(value, min, max);
}
else
{
using U = typename T::Type;
auto [min, max] = accessor.get_range(datum).convert<T>();
constexpr auto igdt = IGDT<U>;
constexpr T step(!std::is_floating_point_v<U> ? U(1) : U(1.f)),
step2(!std::is_floating_point_v<U> ? U(10) : U(0.25f));
switch (repr)
{
default:
fm_warn_once("invalid repr enum value '%zu'", (size_t)repr);
break;
case field_repr::input:
ret = ImGui::InputScalarN(label, igdt, &value, T::Size, &step, &step2);
break;
case field_repr::drag:
fm_warn_once("can't use imgui input drag mode for vector type");
[[fallthrough]];
case field_repr::slider:
ret = ImGui::SliderScalarN(label, igdt, &value, T::Size, &min, &max);
break;
}
value = Math::clamp(value, min, max);
}
if (ret && !should_disable && !eqv(value, orig))
if (accessor.is_enabled(datum) >= field_status::enabled && accessor.can_write())
{
accessor.write_fun(datum, accessor.writer, &value);
T new_value{};
accessor.read_fun(datum, accessor.reader, &new_value);
if (value != new_value)
{
auto* state = ImGui::GetInputTextState(GImGui->ActiveId);
if (state)
state->ReloadUserBuf = true;
}
return true;
}
return false;
}
} // namespace
#define MAKE_SPEC(type, repr) \
template<> \
bool inspect_field<type>(void* datum, const erased_accessor& accessor, \
const ArrayView<const std::pair<StringView, size_t>>& list, \
size_t label_width) \
{ \
return do_inspect_field<type>(datum, accessor, (repr), list, label_width); \
}
#define MAKE_SPEC2(type, repr) \
template<> \
bool inspect_field<field_repr_<type, field_repr, repr>>(void* datum, const erased_accessor& accessor, \
const ArrayView<const std::pair<StringView, size_t>>& list, \
size_t label_width) \
{ \
return do_inspect_field<type>(datum, accessor, (repr), list, label_width); \
}
#define MAKE_SPEC_REPRS(type) \
MAKE_SPEC2(type, field_repr::input) \
MAKE_SPEC2(type, field_repr::slider) \
MAKE_SPEC2(type, field_repr::drag) \
MAKE_SPEC(type, field_repr::input)
#define MAKE_SPEC_REPRS2(type) \
MAKE_SPEC_REPRS(Math::Vector2<type>) \
MAKE_SPEC_REPRS(Math::Vector3<type>) \
MAKE_SPEC_REPRS(Math::Vector4<type>) \
MAKE_SPEC_REPRS(type) \
MAKE_SPEC2(type, field_repr::cbx)
MAKE_SPEC_REPRS2(uint8_t)
MAKE_SPEC_REPRS2(int8_t)
MAKE_SPEC_REPRS2(uint16_t)
MAKE_SPEC_REPRS2(int16_t)
MAKE_SPEC_REPRS2(uint32_t)
MAKE_SPEC_REPRS2(int32_t)
MAKE_SPEC_REPRS2(uint64_t)
MAKE_SPEC_REPRS2(int64_t)
MAKE_SPEC_REPRS2(float)
MAKE_SPEC(bool, field_repr::input)
MAKE_SPEC(String, field_repr::input)
MAKE_SPEC(StringView, field_repr::input)
MAKE_SPEC(Color3ub, field_repr::input)
MAKE_SPEC(Color4ub, field_repr::input)
} // namespace floormat::entities
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