Merge branch 'master' of https://github.com/crupest/CruUI

1 files changed, 458 insertions, 0 deletions

diff --git a/src/win/gui/Window.cpp b/src/win/gui/Window.cpp
new file mode 100644
index 00000000..efd3bfcc
--- /dev/null
+++ b/src/win/gui/Window.cpp
@@ -0,0 +1,458 @@
+#include "cru/win/gui/Window.hpp"
+
+#include "WindowManager.hpp"
+#include "cru/common/Logger.hpp"
+#include "cru/platform/Check.hpp"
+#include "cru/platform/gui/Base.hpp"
+#include "cru/platform/gui/DebugFlags.hpp"
+#include "cru/win/graphics/direct/WindowPainter.hpp"
+#include "cru/win/gui/Cursor.hpp"
+#include "cru/win/gui/Exception.hpp"
+#include "cru/win/gui/InputMethod.hpp"
+#include "cru/win/gui/Keyboard.hpp"
+#include "cru/win/gui/UiApplication.hpp"
+#include "cru/win/gui/WindowClass.hpp"
+
+#include <imm.h>
+#include <windowsx.h>
+#include <memory>
+
+namespace cru::platform::gui::win {
+WinNativeWindow::WinNativeWindow(WinUiApplication* application,
+                                 WindowClass* window_class, DWORD window_style,
+                                 WinNativeWindow* parent)
+    : application_(application), parent_window_(parent) {
+  Expects(application);  // application can't be null.
+
+  if (parent != nullptr) {
+    throw new std::runtime_error("Can't use a invalid window as parent.");
+  }
+
+  const auto window_manager = application->GetWindowManager();
+
+  hwnd_ = CreateWindowExW(
+      0, window_class->GetName(), L"", window_style, CW_USEDEFAULT,
+      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
+      parent == nullptr ? nullptr : parent->GetWindowHandle(), nullptr,
+      application->GetInstanceHandle(), nullptr);
+
+  if (hwnd_ == nullptr)
+    throw Win32Error(::GetLastError(), "Failed to create window.");
+
+  auto dpi = ::GetDpiForWindow(hwnd_);
+  if (dpi == 0)
+    throw Win32Error(::GetLastError(), "Failed to get dpi of window.");
+  dpi_ = static_cast<float>(dpi);
+  log::Debug(u"Dpi of window is {}.", dpi_);
+
+  window_manager->RegisterWindow(hwnd_, this);
+
+  SetCursor(application->GetCursorManager()->GetSystemCursor(
+      cru::platform::gui::SystemCursorType::Arrow));
+
+  window_render_target_ =
+      std::make_unique<graphics::win::direct::D2DWindowRenderTarget>(
+          application->GetDirectFactory(), hwnd_);
+  window_render_target_->SetDpi(dpi_, dpi_);
+
+  input_method_context_ = std::make_unique<WinInputMethodContext>(this);
+  input_method_context_->DisableIME();
+}
+
+WinNativeWindow::~WinNativeWindow() {
+  if (!sync_flag_) {
+    sync_flag_ = true;
+    Close();
+  }
+}
+
+void WinNativeWindow::Close() { ::DestroyWindow(hwnd_); }
+
+bool WinNativeWindow::IsVisible() { return ::IsWindowVisible(hwnd_); }
+
+void WinNativeWindow::SetVisible(bool is_visible) {
+  is_visible ? ShowWindow(hwnd_, SW_SHOWNORMAL) : ShowWindow(hwnd_, SW_HIDE);
+}
+Size WinNativeWindow::GetClientSize() {
+  const auto pixel_rect = GetClientRectPixel();
+  return Size(PixelToDip(pixel_rect.right), PixelToDip(pixel_rect.bottom));
+}
+
+void WinNativeWindow::SetClientSize(const Size& size) {
+  const auto window_style =
+      static_cast<DWORD>(GetWindowLongPtr(hwnd_, GWL_STYLE));
+  const auto window_ex_style =
+      static_cast<DWORD>(GetWindowLongPtr(hwnd_, GWL_EXSTYLE));
+
+  RECT rect;
+  rect.left = 0;
+  rect.top = 0;
+  rect.right = DipToPixel(size.width);
+  rect.bottom = DipToPixel(size.height);
+  if (!AdjustWindowRectEx(&rect, window_style, FALSE, window_ex_style))
+    throw Win32Error(::GetLastError(), "Failed to invoke AdjustWindowRectEx.");
+
+  if (!SetWindowPos(hwnd_, nullptr, 0, 0, rect.right - rect.left,
+                    rect.bottom - rect.top, SWP_NOZORDER | SWP_NOMOVE))
+    throw Win32Error(::GetLastError(), "Failed to invoke SetWindowPos.");
+}
+
+Rect WinNativeWindow::GetWindowRect() {
+  RECT rect;
+  if (!::GetWindowRect(hwnd_, &rect))
+    throw Win32Error(::GetLastError(), "Failed to invoke GetWindowRect.");
+
+  return Rect::FromVertices(PixelToDip(rect.left), PixelToDip(rect.top),
+                            PixelToDip(rect.right), PixelToDip(rect.bottom));
+}
+
+void WinNativeWindow::SetWindowRect(const Rect& rect) {
+  if (!SetWindowPos(hwnd_, nullptr, DipToPixel(rect.left), DipToPixel(rect.top),
+                    DipToPixel(rect.GetRight()), DipToPixel(rect.GetBottom()),
+                    SWP_NOZORDER))
+    throw Win32Error(::GetLastError(), "Failed to invoke SetWindowPos.");
+}
+
+Point WinNativeWindow::GetMousePosition() {
+  POINT p;
+  if (!::GetCursorPos(&p))
+    throw Win32Error(::GetLastError(), "Failed to get cursor position.");
+  if (!::ScreenToClient(hwnd_, &p))
+    throw Win32Error(::GetLastError(), "Failed to call ScreenToClient.");
+  return PixelToDip(p);
+}
+
+bool WinNativeWindow::CaptureMouse() {
+  ::SetCapture(hwnd_);
+  return true;
+}
+
+bool WinNativeWindow::ReleaseMouse() {
+  const auto result = ::ReleaseCapture();
+  return result != 0;
+}
+
+void WinNativeWindow::RequestRepaint() {
+  if constexpr (DebugFlags::paint) {
+    log::TagDebug(log_tag, u"A repaint is requested.");
+  }
+  if (!::InvalidateRect(hwnd_, nullptr, FALSE))
+    throw Win32Error(::GetLastError(), "Failed to invalidate window.");
+  if (!::UpdateWindow(hwnd_))
+    throw Win32Error(::GetLastError(), "Failed to update window.");
+}
+
+std::unique_ptr<graphics::IPainter> WinNativeWindow::BeginPaint() {
+  return std::make_unique<graphics::win::direct::D2DWindowPainter>(
+      window_render_target_.get());
+}
+
+void WinNativeWindow::SetCursor(std::shared_ptr<ICursor> cursor) {
+  if (cursor == nullptr) {
+    throw std::runtime_error("Can't use a nullptr as cursor.");
+  }
+
+  cursor_ = CheckPlatform<WinCursor>(cursor, GetPlatformId());
+
+  if (!::SetClassLongPtrW(hwnd_, GCLP_HCURSOR,
+                          reinterpret_cast<LONG_PTR>(cursor_->GetHandle()))) {
+    log::TagWarn(log_tag,
+                 u"Failed to set cursor because failed to set class long. Last "
+                 u"error code: {}.",
+                 ::GetLastError());
+    return;
+  }
+
+  if (!IsVisible()) return;
+
+  auto lg = [](const std::u16string_view& reason) {
+    log::TagWarn(
+        log_tag,
+        u"Failed to set cursor because {} when window is visible. (We need to "
+        u"update cursor if it is inside the window.) Last error code: {}.",
+        reason, ::GetLastError());
+  };
+
+  ::POINT point;
+  if (!::GetCursorPos(&point)) {
+    lg(u"failed to get cursor pos");
+    return;
+  }
+
+  ::RECT rect;
+  if (!::GetClientRect(hwnd_, &rect)) {
+    lg(u"failed to get window's client rect");
+    return;
+  }
+
+  ::POINT lefttop{rect.left, rect.top};
+  ::POINT rightbottom{rect.right, rect.bottom};
+  if (!::ClientToScreen(hwnd_, &lefttop)) {
+    lg(u"failed to call ClientToScreen on lefttop");
+    return;
+  }
+
+  if (!::ClientToScreen(hwnd_, &rightbottom)) {
+    lg(u"failed to call ClientToScreen on rightbottom");
+    return;
+  }
+
+  if (point.x >= lefttop.x && point.y >= lefttop.y &&
+      point.x <= rightbottom.x && point.y <= rightbottom.y) {
+    ::SetCursor(cursor_->GetHandle());
+  }
+}
+
+IInputMethodContext* WinNativeWindow::GetInputMethodContext() {
+  return static_cast<IInputMethodContext*>(input_method_context_.get());
+}
+
+bool WinNativeWindow::HandleNativeWindowMessage(HWND hwnd, UINT msg,
+                                                WPARAM w_param, LPARAM l_param,
+                                                LRESULT* result) {
+  WindowNativeMessageEventArgs args{
+      WindowNativeMessage{hwnd, msg, w_param, l_param}};
+  native_message_event_.Raise(args);
+  if (args.IsHandled()) {
+    *result = args.GetResult();
+    return true;
+  }
+
+  switch (msg) {
+    case WM_PAINT:
+      OnPaintInternal();
+      *result = 0;
+      return true;
+    case WM_ERASEBKGND:
+      *result = 1;
+      return true;
+    case WM_SETFOCUS:
+      OnSetFocusInternal();
+      *result = 0;
+      return true;
+    case WM_KILLFOCUS:
+      OnKillFocusInternal();
+      *result = 0;
+      return true;
+    case WM_MOUSEMOVE: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseMoveInternal(point);
+      *result = 0;
+      return true;
+    }
+    case WM_LBUTTONDOWN: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseDownInternal(platform::gui::mouse_buttons::left, point);
+      *result = 0;
+      return true;
+    }
+    case WM_LBUTTONUP: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseUpInternal(platform::gui::mouse_buttons::left, point);
+      *result = 0;
+      return true;
+    }
+    case WM_RBUTTONDOWN: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseDownInternal(platform::gui::mouse_buttons::right, point);
+      *result = 0;
+      return true;
+    }
+    case WM_RBUTTONUP: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseUpInternal(platform::gui::mouse_buttons::right, point);
+      *result = 0;
+      return true;
+    }
+    case WM_MBUTTONDOWN: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseDownInternal(platform::gui::mouse_buttons::middle, point);
+      *result = 0;
+      return true;
+    }
+    case WM_MBUTTONUP: {
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      OnMouseUpInternal(platform::gui::mouse_buttons::middle, point);
+      *result = 0;
+      return true;
+    }
+    case WM_MOUSEWHEEL:
+      POINT point;
+      point.x = GET_X_LPARAM(l_param);
+      point.y = GET_Y_LPARAM(l_param);
+      ScreenToClient(hwnd, &point);
+      OnMouseWheelInternal(GET_WHEEL_DELTA_WPARAM(w_param), point);
+      *result = 0;
+      return true;
+    case WM_KEYDOWN:
+      OnKeyDownInternal(static_cast<int>(w_param));
+      *result = 0;
+      return true;
+    case WM_KEYUP:
+      OnKeyUpInternal(static_cast<int>(w_param));
+      *result = 0;
+      return true;
+    case WM_SYSKEYDOWN:
+      if (l_param & (1 << 29)) {
+        OnKeyDownInternal(static_cast<int>(w_param));
+        *result = 0;
+        return true;
+      }
+      return false;
+    case WM_SYSKEYUP:
+      if (l_param & (1 << 29)) {
+        OnKeyUpInternal(static_cast<int>(w_param));
+        *result = 0;
+        return true;
+      }
+      return false;
+    case WM_SIZE:
+      OnResizeInternal(LOWORD(l_param), HIWORD(l_param));
+      *result = 0;
+      return true;
+    case WM_ACTIVATE:
+      if (w_param == WA_ACTIVE || w_param == WA_CLICKACTIVE)
+        OnActivatedInternal();
+      else if (w_param == WA_INACTIVE)
+        OnDeactivatedInternal();
+      *result = 0;
+      return true;
+    case WM_DESTROY:
+      OnDestroyInternal();
+      *result = 0;
+      return true;
+    case WM_IME_SETCONTEXT:
+      l_param &= ~ISC_SHOWUICOMPOSITIONWINDOW;
+      *result = ::DefWindowProcW(hwnd, msg, w_param, l_param);
+      return true;
+    // We must block these message from DefWindowProc or it will create
+    // an ugly composition window.
+    case WM_IME_STARTCOMPOSITION:
+    case WM_IME_COMPOSITION:
+      *result = 0;
+      return true;
+    case WM_DPICHANGED: {
+      dpi_ = static_cast<float>(LOWORD(w_param));
+      const RECT* suggest_rect = reinterpret_cast<const RECT*>(l_param);
+      window_render_target_->SetDpi(dpi_, dpi_);
+      SetWindowPos(hwnd_, NULL, suggest_rect->left, suggest_rect->top,
+                   suggest_rect->right - suggest_rect->left,
+                   suggest_rect->bottom - suggest_rect->top,
+                   SWP_NOZORDER | SWP_NOACTIVATE);
+    }
+    default:
+      return false;
+  }
+}
+
+RECT WinNativeWindow::GetClientRectPixel() {
+  RECT rect;
+  if (!GetClientRect(hwnd_, &rect))
+    throw Win32Error(::GetLastError(), "Failed to invoke GetClientRect.");
+  return rect;
+}
+
+void WinNativeWindow::OnDestroyInternal() {
+  destroy_event_.Raise(nullptr);
+  application_->GetWindowManager()->UnregisterWindow(hwnd_);
+  hwnd_ = nullptr;
+  if (!sync_flag_) {
+    sync_flag_ = true;
+    delete this;
+  }
+}
+
+void WinNativeWindow::OnPaintInternal() {
+  paint_event_.Raise(nullptr);
+  ValidateRect(hwnd_, nullptr);
+  if constexpr (DebugFlags::paint) {
+    log::TagDebug(log_tag, u"A repaint is finished.");
+  }
+}
+
+void WinNativeWindow::OnResizeInternal(const int new_width,
+                                       const int new_height) {
+  if (!(new_width == 0 && new_height == 0)) {
+    window_render_target_->ResizeBuffer(new_width, new_height);
+    resize_event_.Raise(Size{PixelToDip(new_width), PixelToDip(new_height)});
+  }
+}
+
+void WinNativeWindow::OnSetFocusInternal() {
+  has_focus_ = true;
+  focus_event_.Raise(FocusChangeType::Gain);
+}
+
+void WinNativeWindow::OnKillFocusInternal() {
+  has_focus_ = false;
+  focus_event_.Raise(FocusChangeType::Lost);
+}
+
+void WinNativeWindow::OnMouseMoveInternal(const POINT point) {
+  // when mouse was previous outside the window
+  if (!is_mouse_in_) {
+    // invoke TrackMouseEvent to have WM_MOUSELEAVE sent.
+    TRACKMOUSEEVENT tme;
+    tme.cbSize = sizeof tme;
+    tme.dwFlags = TME_LEAVE;
+    tme.hwndTrack = hwnd_;
+
+    TrackMouseEvent(&tme);
+
+    is_mouse_in_ = true;
+    mouse_enter_leave_event_.Raise(MouseEnterLeaveType::Enter);
+  }
+
+  mouse_move_event_.Raise(PixelToDip(point));
+}
+
+void WinNativeWindow::OnMouseLeaveInternal() {
+  is_mouse_in_ = false;
+  mouse_enter_leave_event_.Raise(MouseEnterLeaveType::Leave);
+}
+
+void WinNativeWindow::OnMouseDownInternal(platform::gui::MouseButton button,
+                                          POINT point) {
+  const auto dip_point = PixelToDip(point);
+  mouse_down_event_.Raise({button, dip_point, RetrieveKeyMofifier()});
+}
+
+void WinNativeWindow::OnMouseUpInternal(platform::gui::MouseButton button,
+                                        POINT point) {
+  const auto dip_point = PixelToDip(point);
+  mouse_up_event_.Raise({button, dip_point, RetrieveKeyMofifier()});
+}
+
+void WinNativeWindow::OnMouseWheelInternal(short delta, POINT point) {
+  CRU_UNUSED(delta)
+  CRU_UNUSED(point)
+}
+
+void WinNativeWindow::OnKeyDownInternal(int virtual_code) {
+  key_down_event_.Raise(
+      {VirtualKeyToKeyCode(virtual_code), RetrieveKeyMofifier()});
+}
+
+void WinNativeWindow::OnKeyUpInternal(int virtual_code) {
+  key_up_event_.Raise(
+      {VirtualKeyToKeyCode(virtual_code), RetrieveKeyMofifier()});
+}
+
+void WinNativeWindow::OnActivatedInternal() {}
+
+void WinNativeWindow::OnDeactivatedInternal() {}
+}  // namespace cru::platform::gui::win