// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "atom/browser/ui/win/atom_desktop_window_tree_host_win.h"

#include "ui/base/win/hwnd_metrics.h"

namespace atom {

AtomDesktopWindowTreeHostWin::AtomDesktopWindowTreeHostWin(
    NativeWindowViews* native_window_view,
    views::DesktopNativeWidgetAura* desktop_native_widget_aura)
    : views::DesktopWindowTreeHostWin(native_window_view->widget(),
                                      desktop_native_widget_aura),
      native_window_view_(native_window_view) {}

AtomDesktopWindowTreeHostWin::~AtomDesktopWindowTreeHostWin() {}

bool AtomDesktopWindowTreeHostWin::PreHandleMSG(UINT message,
                                                WPARAM w_param,
                                                LPARAM l_param,
                                                LRESULT* result) {
  return native_window_view_->PreHandleMSG(message, w_param, l_param, result);
}

bool AtomDesktopWindowTreeHostWin::HasNativeFrame() const {
  // Since we never use chromium's titlebar implementation, we can just say
  // that we use a native titlebar. This will disable the repaint locking when
  // DWM composition is disabled.
  return true;
}

bool AtomDesktopWindowTreeHostWin::GetClientAreaInsets(gfx::Insets* insets,
                                                       HMONITOR monitor) const {
  if (IsMaximized() && !native_window_view_->has_frame()) {
    // Windows automatically adds a standard width border to all sides when a
    // window is maximized.
    int frame_thickness = ui::GetFrameThickness(monitor) - 1;
    *insets = gfx::Insets(frame_thickness, frame_thickness, frame_thickness,
                          frame_thickness);
    return true;
  }
  return false;
}

}  // namespace atom
