Refactors HWNDView, NativeViewHostGtk and NativeViewHost so that they match t...

views/controls/hwnd_view.cc

-// Copyright (c) 2006-2008 The Chromium 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 "views/controls/hwnd_view.h"
-
-#include "app/gfx/canvas.h"
-#include "base/logging.h"
-#include "views/focus/focus_manager.h"
-#include "views/widget/widget.h"
-
-namespace views {
-
-static const char kViewClassName[] = "views/HWNDView";
-
-HWNDView::HWNDView() : NativeViewHost() {
-}
-
-HWNDView::~HWNDView() {
-}
-
-void HWNDView::Attach(HWND hwnd) {
-  DCHECK(native_view() == NULL);
-  DCHECK(hwnd) << "Impossible detatched tab case; See crbug.com/6316";
-
-  set_native_view(hwnd);
-
-  // First hide the new window. We don't want anything to draw (like sub-hwnd
-  // borders), when we change the parent below.
-  ShowWindow(hwnd, SW_HIDE);
-
-  // Need to set the HWND's parent before changing its size to avoid flashing.
-  ::SetParent(hwnd, GetWidget()->GetNativeView());
-  Layout();
-
-  // Register with the focus manager so the associated view is focused when the
-  // native control gets the focus.
-  FocusManager::InstallFocusSubclass(
-      hwnd, associated_focus_view() ? associated_focus_view() : this);
-}
-
-void HWNDView::Detach() {
-  DCHECK(native_view());
-  FocusManager::UninstallFocusSubclass(native_view());
-  set_native_view(NULL);
-  set_installed_clip(false);
-}
-
-void HWNDView::Paint(gfx::Canvas* canvas) {
-  // The area behind our window is black, so during a fast resize (where our
-  // content doesn't draw over the full size of our HWND, and the HWND
-  // background color doesn't show up), we need to cover that blackness with
-  // something so that fast resizes don't result in black flash.
-  //
-  // It would be nice if this used some approximation of the page's
-  // current background color.
-  if (installed_clip())
-    canvas->FillRectInt(SkColorSetRGB(255, 255, 255), 0, 0, width(), height());
-}
-
-std::string HWNDView::GetClassName() const {
-  return kViewClassName;
-}
-
-void HWNDView::ViewHierarchyChanged(bool is_add, View *parent, View *child) {
-  if (!native_view())
-    return;
-
-  Widget* widget = GetWidget();
-  if (is_add && widget) {
-    HWND parent_hwnd = ::GetParent(native_view());
-    HWND widget_hwnd = widget->GetNativeView();
-    if (parent_hwnd != widget_hwnd)
-      ::SetParent(native_view(), widget_hwnd);
-    if (IsVisibleInRootView())
-      ::ShowWindow(native_view(), SW_SHOW);
-    else
-      ::ShowWindow(native_view(), SW_HIDE);
-    Layout();
-  } else if (!is_add) {
-    ::ShowWindow(native_view(), SW_HIDE);
-    ::SetParent(native_view(), NULL);
-  }
-}
-
-void HWNDView::Focus() {
-  ::SetFocus(native_view());
-}
-
-void HWNDView::InstallClip(int x, int y, int w, int h) {
-  HRGN clip_region = CreateRectRgn(x, y, x + w, y + h);
-  // NOTE: SetWindowRgn owns the region (as well as the deleting the
-  // current region), as such we don't delete the old region.
-  SetWindowRgn(native_view(), clip_region, FALSE);
-}
-
-void HWNDView::UninstallClip() {
-  SetWindowRgn(native_view(), 0, FALSE);
-}
-
-void HWNDView::ShowWidget(int x, int y, int w, int h) {
-  UINT swp_flags = SWP_DEFERERASE |
-                   SWP_NOACTIVATE |
-                   SWP_NOCOPYBITS |
-                   SWP_NOOWNERZORDER |
-                   SWP_NOZORDER;
-  // Only send the SHOWWINDOW flag if we're invisible, to avoid flashing.
-  if (!::IsWindowVisible(native_view()))
-    swp_flags = (swp_flags | SWP_SHOWWINDOW) & ~SWP_NOREDRAW;
-
-  if (fast_resize()) {
-    // In a fast resize, we move the window and clip it with SetWindowRgn.
-    RECT win_rect;
-    GetWindowRect(native_view(), &win_rect);
-    gfx::Rect rect(win_rect);
-    ::SetWindowPos(native_view(), 0, x, y, rect.width(), rect.height(),
-                   swp_flags);
-
-    HRGN clip_region = CreateRectRgn(0, 0, w, h);
-    SetWindowRgn(native_view(), clip_region, FALSE);
-    set_installed_clip(true);
-  } else {
-    ::SetWindowPos(native_view(), 0, x, y, w, h, swp_flags);
-  }
-}
-
-void HWNDView::HideWidget() {
-  if (!::IsWindowVisible(native_view()))
-    return;  // Currently not visible, nothing to do.
-
-  // The window is currently visible, but its clipped by another view. Hide
-  // it.
-  ::SetWindowPos(native_view(), 0, 0, 0, 0, 0,
-                 SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER |
-                 SWP_NOREDRAW | SWP_NOOWNERZORDER);
-}
-
-}  // namespace views