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#include "text_box.h"
#include <cwctype>
#include "graph/graph.h"
#include "exception.h"
namespace cru::ui::controls
{
using graph::CreateSolidBrush;
inline Microsoft::WRL::ComPtr<IDWriteFactory> GetDWriteFactory()
{
return graph::GraphManager::GetInstance()->GetDWriteFactory();
}
TextBox::TextBox(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format,
const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush) : TextControl(init_text_format, init_brush)
{
SetSelectable(true);
caret_brush_ = CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::Black));
caret_action_ = CreateActionPtr([this]
{
is_caret_show_ = !is_caret_show_;
Repaint();
});
}
TextBox::~TextBox() = default;
void TextBox::OnDraw(ID2D1DeviceContext* device_context)
{
TextControl::OnDraw(device_context);
if (is_caret_show_)
{
const auto caret_half_width = Application::GetInstance()->GetCaretInfo().half_caret_width;
FLOAT x, y;
DWRITE_HIT_TEST_METRICS metrics{};
ThrowIfFailed(text_layout_->HitTestTextPosition(caret_position_, FALSE, &x, &y, &metrics));
device_context->FillRectangle(D2D1::RectF(metrics.left - caret_half_width, metrics.top, metrics.left + caret_half_width, metrics.top + metrics.height), caret_brush_.Get());
}
}
void TextBox::OnGetFocusCore(events::FocusChangeEventArgs& args)
{
TextControl::OnGetFocusCore(args);
assert(caret_timer_ == nullptr);
is_caret_show_ = true;
caret_timer_ = SetInterval(Application::GetInstance()->GetCaretInfo().caret_blink_duration, caret_action_);
}
void TextBox::OnLoseFocusCore(events::FocusChangeEventArgs& args)
{
Control::OnLoseFocusCore(args);
assert(caret_timer_ != nullptr);
caret_timer_->Cancel();
caret_timer_ = nullptr;
is_caret_show_ = false;
}
void TextBox::OnKeyDownCore(events::KeyEventArgs& args)
{
Control::OnKeyDownCore(args);
if (args.GetVirtualCode() == VK_LEFT && caret_position_ > 0)
{
ClearSelection();
caret_position_--;
Repaint();
}
if (args.GetVirtualCode() == VK_RIGHT && caret_position_ < GetText().size())
{
ClearSelection();
caret_position_++;
Repaint();
}
}
void TextBox::OnCharCore(events::CharEventArgs& args)
{
Control::OnCharCore(args);
if (args.GetChar() == L'\b')
{
if (GetSelectedRange().has_value())
{
const auto selection_range = GetSelectedRange().value();
auto text = GetText();
text.erase(text.cbegin() + selection_range.position, text.cbegin() + selection_range.position + selection_range.count);
SetText(text);
caret_position_ = selection_range.position;
ClearSelection();
}
else
{
if (caret_position_ > 0)
{
auto text = GetText();
if (!text.empty())
{
const auto position = --caret_position_;
text.erase(text.cbegin() + position);
SetText(text);
}
}
}
return;
}
if (std::iswprint(args.GetChar()))
{
if (GetSelectedRange().has_value())
{
const auto selection_range = GetSelectedRange().value();
auto text = GetText();
text.erase(selection_range.position, selection_range.count);
text.insert(text.cbegin() + selection_range.position, args.GetChar());
SetText(text);
caret_position_ = selection_range.position + 1;
ClearSelection();
}
else
{
ClearSelection();
const auto position = caret_position_++;
auto text = GetText();
text.insert(text.cbegin() + position, { args.GetChar() });
SetText(text);
}
}
}
void TextBox::RequestChangeCaretPosition(const unsigned position)
{
caret_position_ = position;
Repaint();
}
}
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