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#pragma once
#include "Base.hpp"
#include "cru/platform/gui/InputMethod.hpp"
#include "cru/platform/gui/TimerHelper.hpp"
#include "cru/platform/gui/UiApplication.hpp"
#include "cru/ui/controls/Control.hpp"
#include "cru/ui/helper/ShortcutHub.hpp"
#include <functional>
#include <string>
namespace cru::ui::render {
class TextRenderObject;
class ScrollRenderObject;
} // namespace cru::ui::render
namespace cru::ui::controls {
constexpr int k_default_caret_blink_duration = 500;
struct ITextHostControl : virtual Interface {
virtual gsl::not_null<render::TextRenderObject*> GetTextRenderObject() = 0;
// May return nullptr.
virtual render::ScrollRenderObject* GetScrollRenderObject() = 0;
};
class TextHostControlService : public Object {
CRU_DEFINE_CLASS_LOG_TAG(u"cru::ui::controls::TextControlService")
public:
TextHostControlService(gsl::not_null<Control*> control);
CRU_DELETE_COPY(TextHostControlService)
CRU_DELETE_MOVE(TextHostControlService)
~TextHostControlService() = default;
public:
bool IsEnabled() { return enable_; }
void SetEnabled(bool enable);
bool IsEditable() { return this->editable_; }
void SetEditable(bool editable);
std::u16string GetText() { return this->text_; }
std::u16string_view GetTextView() { return this->text_; }
void SetText(std::u16string text, bool stop_composition = false);
void InsertText(gsl::index position, std::u16string_view text,
bool stop_composition = false);
void DeleteChar(gsl::index position, bool stop_composition = false);
// Return the position of deleted character.
gsl::index DeleteCharPrevious(gsl::index position,
bool stop_composition = false);
void DeleteText(TextRange range, bool stop_composition = false);
void CancelComposition();
std::optional<platform::gui::CompositionText> GetCompositionInfo();
bool IsCaretVisible() { return caret_visible_; }
void SetCaretVisible(bool visible);
int GetCaretBlinkDuration() { return caret_blink_duration_; }
void SetCaretBlinkDuration(int milliseconds);
gsl::index GetCaretPosition() { return selection_.GetEnd(); }
TextRange GetSelection() { return selection_; }
void SetSelection(gsl::index caret_position);
void SetSelection(TextRange selection, bool scroll_to_caret = true);
void ChangeSelectionEnd(gsl::index new_end);
void AbortSelection();
void DeleteSelectedText();
// If some text is selected, then they are deleted first. Then insert text
// into caret position.
void ReplaceSelectedText(std::u16string_view text);
void ScrollToCaret();
private:
gsl::not_null<render::TextRenderObject*> GetTextRenderObject();
render::ScrollRenderObject* GetScrollRenderObject();
// May return nullptr.
platform::gui::IInputMethodContext* GetInputMethodContext();
void CoerceSelection();
void SetupCaret();
void TearDownCaret();
void SyncTextRenderObject();
void UpdateInputMethodPosition();
template <typename TArgs>
void SetupOneHandler(event::RoutedEvent<TArgs>* (Control::*event)(),
void (TextHostControlService::*handler)(
typename event::RoutedEvent<TArgs>::EventArgs)) {
this->event_guard_ += (this->control_->*event)()->Bubble()->AddHandler(
std::bind(handler, this, std::placeholders::_1));
}
void MouseMoveHandler(event::MouseEventArgs& args);
void MouseDownHandler(event::MouseButtonEventArgs& args);
void MouseUpHandler(event::MouseButtonEventArgs& args);
void GainFocusHandler(event::FocusChangeEventArgs& args);
void LoseFocusHandler(event::FocusChangeEventArgs& args);
void SetUpShortcuts();
private:
gsl::not_null<Control*> control_;
gsl::not_null<ITextHostControl*> text_host_control_;
EventRevokerListGuard event_guard_;
EventRevokerListGuard input_method_context_event_guard_;
std::u16string text_;
TextRange selection_;
bool enable_ = false;
bool editable_ = false;
bool caret_visible_ = false;
platform::gui::TimerAutoCanceler caret_timer_canceler_;
int caret_blink_duration_ = k_default_caret_blink_duration;
helper::ShortcutHub shortcut_hub_;
// true if left mouse is down and selecting
bool mouse_move_selecting_ = false;
};
} // namespace cru::ui::controls
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