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#include "cru/platform/graph/factory.hpp"
#include "cru/platform/graph/font.hpp"
#include "cru/platform/graph/painter.hpp"
#include "cru/platform/native/input_method.hpp"
#include "cru/platform/native/ui_application.hpp"
#include "cru/platform/native/window.hpp"
int main() {
using namespace cru::platform;
using namespace cru::platform::graph;
using namespace cru::platform::native;
auto application = CreateUiApplication();
auto graph_factory = application->GetGraphFactory();
auto window_resolver = application->CreateWindow(nullptr);
auto window = window_resolver->Resolve();
auto input_method_context =
application->GetInputMethodManager()->GetContext(window);
auto brush = graph_factory->CreateSolidColorBrush();
brush->SetColor(colors::black);
auto odd_clause_brush = graph_factory->CreateSolidColorBrush();
odd_clause_brush->SetColor(colors::yellow);
auto even_clause_brush = graph_factory->CreateSolidColorBrush();
even_clause_brush->SetColor(colors::green);
auto target_clause_brush = graph_factory->CreateSolidColorBrush();
target_clause_brush->SetColor(colors::blue);
std::shared_ptr<IFont> font = graph_factory->CreateFont("等线", 30);
auto prompt_text_layout =
graph_factory->CreateTextLayout(font,
"Alt+F1: Enable IME\n"
"Alt+F2: Disable IME\n"
"Alt+F3: Complete composition.\n"
"Alt+F4: Cancel composition.");
auto no_composition_text_layout =
graph_factory->CreateTextLayout(font, "Not compositioning!");
std::optional<CompositionText> optional_composition_text;
std::string committed_text;
window->PaintEvent()->AddHandler([&](auto) {
auto painter = window->BeginPaint();
painter->Clear(colors::white);
painter->DrawText(Point{}, prompt_text_layout.get(), brush.get());
auto anchor_y = prompt_text_layout->GetTextBounds().height;
if (optional_composition_text) {
const auto& composition_text = *optional_composition_text;
auto composition_text_layout =
graph_factory->CreateTextLayout(font, composition_text.text);
for (int i = 0; i < composition_text.clauses.size(); i++) {
const auto& clause = composition_text.clauses[i];
auto rects = composition_text_layout->TextRangeRect(
TextRange::FromTwoSides(clause.start, clause.end));
const auto& b = clause.target
? target_clause_brush
: (i % 2 ? odd_clause_brush : even_clause_brush);
for (auto& rect : rects) {
rect.top += anchor_y;
painter->FillRectangle(rect, b.get());
}
}
painter->DrawText(Point{0, anchor_y}, composition_text_layout.get(),
brush.get());
anchor_y += composition_text_layout->GetTextBounds().height;
} else {
painter->DrawText(Point{0, anchor_y}, no_composition_text_layout.get(),
brush.get());
anchor_y += no_composition_text_layout->GetTextBounds().height;
}
auto committed_text_layout =
graph_factory->CreateTextLayout(font, committed_text);
painter->DrawText(Point{0, anchor_y}, committed_text_layout.get(),
brush.get());
});
window->KeyDownEvent()->AddHandler(
[&input_method_context](const NativeKeyEventArgs& args) {
if (args.modifier & key_modifiers::alt) {
switch (args.key) {
case KeyCode::F1:
input_method_context->EnableIME();
break;
case KeyCode::F2:
input_method_context->DisableIME();
break;
case KeyCode::F3:
input_method_context->CompleteComposition();
break;
case KeyCode::F4:
input_method_context->CancelComposition();
break;
default:
break;
}
}
});
window->CharEvent()->AddHandler(
[window, &committed_text](const std::string_view& c) {
committed_text += c;
window->RequestRepaint();
});
input_method_context->CompositionEvent()->AddHandler(
[window, &input_method_context, &optional_composition_text](auto) {
optional_composition_text = input_method_context->GetCompositionText();
window->RequestRepaint();
});
input_method_context->CompositionEndEvent()->AddHandler(
[window, &input_method_context, &optional_composition_text](auto) {
optional_composition_text = std::nullopt;
window->RequestRepaint();
});
window->SetVisible(true);
return application->Run();
}
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