host_window_regular.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "flutter/shell/platform/windows/host_window_regular.h"
 
#include "flutter/shell/platform/windows/flutter_windows_engine.h"
 
namespace flutter {
HostWindowRegular::HostWindowRegular(WindowManager* window_manager,
                                     FlutterWindowsEngine* engine,
                                     const WindowSizeRequest& preferred_size,
                                     const BoxConstraints& constraints,
                                     LPCWSTR title)
 
    : HostWindow(window_manager, engine) {
  // TODO(knopp): Investigate sizing the window to its content with the help of
  // https://github.com/flutter/flutter/pull/173610.
  FML_CHECK(preferred_size.has_preferred_view_size);
  InitializeFlutterView(HostWindowInitializationParams{
      .archetype = WindowArchetype::kRegular,
      .window_style = WS_OVERLAPPEDWINDOW,
      .extended_window_style = 0,
      .box_constraints = constraints,
      .initial_window_rect =
          GetInitialRect(engine, preferred_size, constraints),
      .title = title,
      .owner_window = std::optional<HWND>(),
  });
}
 
Rect HostWindowRegular::GetInitialRect(FlutterWindowsEngine* engine,
                                       const WindowSizeRequest& preferred_size,
                                       const BoxConstraints& constraints) {
  std::optional<Size> const window_size =
      HostWindow::GetWindowSizeForClientSize(
          *engine->windows_proc_table(),
          Size(preferred_size.preferred_view_width,
               preferred_size.preferred_view_height),
          constraints.smallest(), constraints.biggest(), WS_OVERLAPPEDWINDOW, 0,
          nullptr);
  return {{CW_USEDEFAULT, CW_USEDEFAULT},
          window_size ? *window_size : Size{CW_USEDEFAULT, CW_USEDEFAULT}};
}
 
}  // namespace flutter