...

1 files changed, 0 insertions, 511 deletions

diff --git a/src/ui/controls/TextControlService.hpp b/src/ui/controls/TextControlService.hpp
deleted file mode 100644
index c535512f..00000000
--- a/src/ui/controls/TextControlService.hpp
+++ /dev/null
@@ -1,511 +0,0 @@
-#pragma once
-#include "../Helper.hpp"
-#include "cru/common/Logger.hpp"
-#include "cru/common/StringUtil.hpp"
-#include "cru/platform/graphics/Font.hpp"
-#include "cru/platform/graphics/Painter.hpp"
-#include "cru/platform/gui/Cursor.hpp"
-#include "cru/platform/gui/InputMethod.hpp"
-#include "cru/platform/gui/UiApplication.hpp"
-#include "cru/platform/gui/Window.hpp"
-#include "cru/ui/Base.hpp"
-#include "cru/ui/DebugFlags.hpp"
-#include "cru/ui/controls/Control.hpp"
-#include "cru/ui/events/UiEvent.hpp"
-#include "cru/ui/helper/ShortcutHub.hpp"
-#include "cru/ui/host/WindowHost.hpp"
-#include "cru/ui/render/CanvasRenderObject.hpp"
-#include "cru/ui/render/ScrollRenderObject.hpp"
-#include "cru/ui/render/TextRenderObject.hpp"
-
-#include <string>
-
-namespace cru::ui::controls {
-constexpr int k_default_caret_blink_duration = 500;
-
-// TControl should inherits `Control` and has following methods:
-// ```
-// gsl::not_null<render::TextRenderObject*> GetTextRenderObject();
-// render::ScrollRenderObject* GetScrollRenderObject();
-// ```
-template <typename TControl>
-class TextControlService : public Object {
-  CRU_DEFINE_CLASS_LOG_TAG(u"cru::ui::controls::TextControlService")
-
- public:
-  TextControlService(gsl::not_null<TControl*> control) : control_(control) {}
-
-  CRU_DELETE_COPY(TextControlService)
-  CRU_DELETE_MOVE(TextControlService)
-
-  ~TextControlService() = default;
-
- public:
-  bool IsEnabled() { return enable_; }
-
-  void SetEnabled(bool enable) {
-    if (enable == this->enable_) return;
-    this->enable_ = enable;
-    if (enable) {
-      this->SetUpHandlers();
-      if (this->caret_visible_) {
-        this->SetupCaret();
-      }
-      this->control_->SetCursor(
-          GetUiApplication()->GetCursorManager()->GetSystemCursor(
-              platform::gui::SystemCursorType::IBeam));
-    } else {
-      this->AbortSelection();
-      this->TearDownHandlers();
-      this->TearDownCaret();
-      this->control_->SetCursor(nullptr);
-    }
-  }
-
-  bool IsEditable() { return this->editable_; }
-
-  void SetEditable(bool editable) {
-    this->editable_ = editable;
-    if (!editable) CancelComposition();
-  }
-
-  std::u16string GetText() { return this->text_; }
-  std::u16string_view GetTextView() { return this->text_; }
-  void SetText(std::u16string text, bool stop_composition = false) {
-    this->text_ = std::move(text);
-    CoerceSelection();
-    if (stop_composition) {
-      CancelComposition();
-    }
-    SyncTextRenderObject();
-  }
-
-  void InsertText(gsl::index position, std::u16string_view text,
-                  bool stop_composition = false) {
-    if (!Utf16IsValidInsertPosition(this->text_, position)) {
-      log::TagError(log_tag, u"Invalid text insert position.");
-      return;
-    }
-    this->text_.insert(this->text_.cbegin() + position, text.begin(),
-                       text.end());
-    if (stop_composition) {
-      CancelComposition();
-    }
-    SyncTextRenderObject();
-  }
-
-  void DeleteChar(gsl::index position, bool stop_composition = false) {
-    if (!Utf16IsValidInsertPosition(this->text_, position)) {
-      log::TagError(log_tag, u"Invalid text delete position.");
-      return;
-    }
-    if (position == static_cast<gsl::index>(this->text_.size())) return;
-    Index next;
-    Utf16NextCodePoint(this->text_, position, &next);
-    this->DeleteText(TextRange::FromTwoSides(position, next), stop_composition);
-  }
-
-  // Return the position of deleted character.
-  gsl::index DeleteCharPrevious(gsl::index position,
-                                bool stop_composition = false) {
-    if (!Utf16IsValidInsertPosition(this->text_, position)) {
-      log::TagError(log_tag, u"Invalid text delete position.");
-      return 0;
-    }
-    if (position == 0) return 0;
-    Index previous;
-    Utf16PreviousCodePoint(this->text_, position, &previous);
-    this->DeleteText(TextRange::FromTwoSides(previous, position),
-                     stop_composition);
-    return previous;
-  }
-
-  void DeleteText(TextRange range, bool stop_composition = false) {
-    if (range.count == 0) return;
-    range = range.Normalize();
-    if (!Utf16IsValidInsertPosition(this->text_, range.GetStart())) {
-      log::TagError(log_tag, u"Invalid text delete start position.");
-      return;
-    }
-    if (!Utf16IsValidInsertPosition(this->text_, range.GetStart())) {
-      log::TagError(log_tag, u"Invalid text delete end position.");
-      return;
-    }
-    this->text_.erase(this->text_.cbegin() + range.GetStart(),
-                      this->text_.cbegin() + range.GetEnd());
-    this->CoerceSelection();
-    if (stop_composition) {
-      CancelComposition();
-    }
-    this->SyncTextRenderObject();
-  }
-
-  platform::gui::IInputMethodContext* GetInputMethodContext() {
-    host::WindowHost* host = this->control_->GetWindowHost();
-    if (!host) return nullptr;
-    platform::gui::INativeWindow* native_window = host->GetNativeWindow();
-    if (!native_window) return nullptr;
-    return native_window->GetInputMethodContext();
-  }
-
-  void CancelComposition() {
-    auto input_method_context = GetInputMethodContext();
-    if (input_method_context == nullptr) return;
-    input_method_context->CancelComposition();
-  }
-
-  std::optional<platform::gui::CompositionText> GetCompositionInfo() {
-    auto input_method_context = GetInputMethodContext();
-    if (input_method_context == nullptr) return std::nullopt;
-    auto composition_info = input_method_context->GetCompositionText();
-    if (composition_info.text.empty()) return std::nullopt;
-    return composition_info;
-  }
-
-  bool IsCaretVisible() { return caret_visible_; }
-
-  void SetCaretVisible(bool visible) {
-    if (visible == this->caret_visible_) return;
-
-    this->caret_visible_ = visible;
-
-    if (this->enable_) {
-      if (visible) {
-        this->SetupCaret();
-      } else {
-        this->TearDownCaret();
-      }
-    }
-  }
-
-  int GetCaretBlinkDuration() { return caret_blink_duration_; }
-
-  void SetCaretBlinkDuration(int milliseconds) {
-    if (this->caret_blink_duration_ == milliseconds) return;
-
-    if (this->enable_ && this->caret_visible_) {
-      this->TearDownCaret();
-      this->SetupCaret();
-    }
-  }
-
-  gsl::not_null<render::TextRenderObject*> GetTextRenderObject() {
-    return this->control_->GetTextRenderObject();
-  }
-
-  render::ScrollRenderObject* GetScrollRenderObject() {
-    return this->control_->GetScrollRenderObject();
-  }
-
-  gsl::index GetCaretPosition() { return selection_.GetEnd(); }
-
-  TextRange GetSelection() { return selection_; }
-
-  void SetSelection(gsl::index caret_position) {
-    this->SetSelection(TextRange{caret_position, 0});
-  }
-
-  void SetSelection(TextRange selection, bool scroll_to_caret = true) {
-    this->selection_ = selection;
-    CoerceSelection();
-    SyncTextRenderObject();
-    if (scroll_to_caret) {
-      this->ScrollToCaret();
-    }
-  }
-
-  void DeleteSelectedText() {
-    this->DeleteText(GetSelection());
-    SetSelection(GetSelection().Normalize().GetStart());
-  }
-
-  // If some text is selected, then they are deleted first. Then insert text
-  // into caret position.
-  void ReplaceSelectedText(std::u16string_view text) {
-    DeleteSelectedText();
-    InsertText(GetSelection().GetStart(), text);
-    SetSelection(GetSelection().GetStart() + text.size());
-  }
-
-  void ScrollToCaret() {
-    if (const auto scroll_render_object = this->GetScrollRenderObject()) {
-      this->control_->GetWindowHost()->RunAfterLayoutStable(
-          [this, scroll_render_object]() {
-            const auto caret_rect = this->GetTextRenderObject()->GetCaretRect();
-            scroll_render_object->ScrollToContain(caret_rect, Thickness{5.f});
-          });
-    }
-  }
-
- private:
-  void CoerceSelection() {
-    this->selection_ = this->selection_.CoerceInto(0, text_.size());
-  }
-
-  void AbortSelection() {
-    if (this->select_down_button_.has_value()) {
-      this->control_->ReleaseMouse();
-      this->select_down_button_ = std::nullopt;
-    }
-    this->GetTextRenderObject()->SetSelectionRange(std::nullopt);
-  }
-
-  void SetupCaret() {
-    const auto application = GetUiApplication();
-    this->GetTextRenderObject()->SetDrawCaret(true);
-    this->caret_timer_canceler_.Reset(application->SetInterval(
-        std::chrono::milliseconds(this->caret_blink_duration_),
-        [this] { this->GetTextRenderObject()->ToggleDrawCaret(); }));
-  }
-
-  void TearDownCaret() {
-    this->caret_timer_canceler_.Reset();
-    this->GetTextRenderObject()->SetDrawCaret(false);
-  }
-
-  void SyncTextRenderObject() {
-    const auto text_render_object = this->GetTextRenderObject();
-    const auto composition_info = this->GetCompositionInfo();
-    if (composition_info) {
-      const auto caret_position = GetCaretPosition();
-      auto text = this->text_;
-      text.insert(caret_position, composition_info->text);
-      text_render_object->SetText(text);
-      text_render_object->SetCaretPosition(
-          caret_position + composition_info->selection.GetEnd());
-      auto selection = composition_info->selection;
-      selection.position += caret_position;
-      text_render_object->SetSelectionRange(selection);
-    } else {
-      text_render_object->SetText(this->text_);
-      text_render_object->SetCaretPosition(this->GetCaretPosition());
-      text_render_object->SetSelectionRange(this->GetSelection());
-    }
-  }
-
-  void StartSelection(Index start) {
-    SetSelection(start);
-    if constexpr (debug_flags::text_service)
-      log::TagDebug(log_tag, u"Text selection started, position: {}.", start);
-  }
-
-  void UpdateSelection(Index new_end) {
-    auto selection = GetSelection();
-    selection.AdjustEnd(new_end);
-    this->SetSelection(selection);
-    if constexpr (debug_flags::text_service)
-      log::TagDebug(log_tag, u"Text selection updated, range: {}, {}.",
-                    selection.GetStart(), selection.GetEnd());
-  }
-
-  void UpdateInputMethodPosition() {
-    if (auto input_method_context = this->GetInputMethodContext()) {
-      Point right_bottom =
-          this->GetTextRenderObject()->GetTotalOffset() +
-          this->GetTextRenderObject()->GetCaretRect().GetRightBottom();
-      right_bottom.x += 5;
-      right_bottom.y += 5;
-
-      if constexpr (debug_flags::text_service) {
-        log::TagDebug(log_tag,
-                      u"Calculate input method candidate window position: {}.",
-                      right_bottom.ToDebugString());
-      }
-
-      input_method_context->SetCandidateWindowPosition(right_bottom);
-    }
-  }
-
-  template <typename TArgs>
-  void SetupOneHandler(event::RoutedEvent<TArgs>* (Control::*event)(),
-                       void (TextControlService::*handler)(
-                           typename event::RoutedEvent<TArgs>::EventArgs)) {
-    this->event_guard_ += (this->control_->*event)()->Direct()->AddHandler(
-        std::bind(handler, this, std::placeholders::_1));
-  }
-
-  void SetUpHandlers() {
-    Expects(event_guard_.IsEmpty());
-
-    SetupOneHandler(&Control::MouseMoveEvent,
-                    &TextControlService::MouseMoveHandler);
-    SetupOneHandler(&Control::MouseDownEvent,
-                    &TextControlService::MouseDownHandler);
-    SetupOneHandler(&Control::MouseUpEvent,
-                    &TextControlService::MouseUpHandler);
-    SetupOneHandler(&Control::KeyDownEvent,
-                    &TextControlService::KeyDownHandler);
-    SetupOneHandler(&Control::GainFocusEvent,
-                    &TextControlService::GainFocusHandler);
-    SetupOneHandler(&Control::LoseFocusEvent,
-                    &TextControlService::LoseFocusHandler);
-
-    shortcut_hub_.Install(control_);
-  }
-
-  void TearDownHandlers() {
-    event_guard_.Clear();
-    shortcut_hub_.Uninstall();
-  }
-
-  void MouseMoveHandler(event::MouseEventArgs& args) {
-    if (this->select_down_button_.has_value()) {
-      const auto text_render_object = this->GetTextRenderObject();
-      const auto result = text_render_object->TextHitTest(
-          args.GetPointToContent(text_render_object));
-      const auto position = result.position + (result.trailing ? 1 : 0);
-      UpdateSelection(position);
-    }
-  }
-
-  void MouseDownHandler(event::MouseButtonEventArgs& args) {
-    if (this->select_down_button_.has_value()) {
-      return;
-    } else {
-      this->control_->SetFocus();
-      if (!this->control_->CaptureMouse()) return;
-      const auto text_render_object = this->GetTextRenderObject();
-      this->select_down_button_ = args.GetButton();
-      const auto result = text_render_object->TextHitTest(
-          args.GetPointToContent(text_render_object));
-      const auto position = result.position + (result.trailing ? 1 : 0);
-      StartSelection(position);
-    }
-  }
-
-  void MouseUpHandler(event::MouseButtonEventArgs& args) {
-    if (this->select_down_button_.has_value() &&
-        this->select_down_button_.value() == args.GetButton()) {
-      this->control_->ReleaseMouse();
-      this->select_down_button_ = std::nullopt;
-    }
-  }
-
-  void KeyDownHandler(event::KeyEventArgs& args) {
-    const auto key_code = args.GetKeyCode();
-    using cru::platform::gui::KeyCode;
-    using cru::platform::gui::KeyModifiers;
-
-    switch (key_code) {
-      case KeyCode::Backspace: {
-        if (!IsEditable()) return;
-        const auto selection = GetSelection();
-        if (selection.count == 0) {
-          SetSelection(DeleteCharPrevious(GetCaretPosition()));
-        } else {
-          this->DeleteSelectedText();
-        }
-      } break;
-      case KeyCode::Delete: {
-        if (!IsEditable()) return;
-        const auto selection = GetSelection();
-        if (selection.count == 0) {
-          DeleteChar(GetCaretPosition());
-        } else {
-          this->DeleteSelectedText();
-        }
-      } break;
-      case KeyCode::Left: {
-        const auto key_modifier = args.GetKeyModifier();
-        const bool shift = key_modifier & KeyModifiers::shift;
-        auto text = this->GetTextView();
-        if (shift) {
-          auto selection = this->GetSelection();
-          gsl::index new_position;
-          Utf16PreviousCodePoint(text, selection.GetEnd(), &new_position);
-          selection.AdjustEnd(new_position);
-          this->SetSelection(selection);
-        } else {
-          const auto caret = this->GetCaretPosition();
-          gsl::index new_position;
-          Utf16PreviousCodePoint(text, caret, &new_position);
-          this->SetSelection(new_position);
-        }
-      } break;
-      case KeyCode::Right: {
-        const auto key_modifier = args.GetKeyModifier();
-        const bool shift = key_modifier & KeyModifiers::shift;
-        auto text = this->GetTextView();
-        if (shift) {
-          auto selection = this->GetSelection();
-          gsl::index new_position;
-          Utf16NextCodePoint(text, selection.GetEnd(), &new_position);
-          selection.AdjustEnd(new_position);
-          this->SetSelection(selection);
-        } else {
-          const auto caret = this->GetCaretPosition();
-          gsl::index new_position;
-          Utf16NextCodePoint(text, caret, &new_position);
-          this->SetSelection(new_position);
-        }
-      } break;
-      default:
-        break;
-    }
-  }
-
-  void GainFocusHandler(event::FocusChangeEventArgs& args) {
-    CRU_UNUSED(args);
-    if (editable_) {
-      auto input_method_context = GetInputMethodContext();
-      if (input_method_context == nullptr) return;
-      input_method_context->EnableIME();
-      auto sync = [this](std::nullptr_t) {
-        this->SyncTextRenderObject();
-        ScrollToCaret();
-      };
-      input_method_context_event_guard_ +=
-          input_method_context->CompositionStartEvent()->AddHandler(
-              [this](std::nullptr_t) { this->DeleteSelectedText(); });
-      input_method_context_event_guard_ +=
-          input_method_context->CompositionEvent()->AddHandler(sync);
-      input_method_context_event_guard_ +=
-          input_method_context->CompositionEndEvent()->AddHandler(sync);
-      input_method_context_event_guard_ +=
-          input_method_context->TextEvent()->AddHandler(
-              [this](const std::u16string_view& text) {
-                if (text == u"\b") return;
-                this->ReplaceSelectedText(text);
-              });
-
-      host::WindowHost* window_host = control_->GetWindowHost();
-      if (window_host)
-        input_method_context_event_guard_ +=
-            window_host->AfterLayoutEvent()->AddHandler(
-                [this](auto) { this->UpdateInputMethodPosition(); });
-      SetCaretVisible(true);
-    }
-  }
-
-  void LoseFocusHandler(event::FocusChangeEventArgs& args) {
-    if (!args.IsWindow()) this->AbortSelection();
-    input_method_context_event_guard_.Clear();
-    auto input_method_context = GetInputMethodContext();
-    if (input_method_context) {
-      input_method_context->DisableIME();
-    }
-    SetCaretVisible(false);
-    SyncTextRenderObject();
-  }
-
- private:
-  gsl::not_null<TControl*> 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_;
-
-  // nullopt means not selecting
-  std::optional<MouseButton> select_down_button_;
-};
-}  // namespace cru::ui::controls