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// Copyright (c) 2011 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/native/native_view_host_win.h"
#include <oleacc.h>
#include "base/logging.h"
#include "ui/gfx/canvas.h"
#include "ui/views/focus/focus_manager.h"
#include "views/controls/native/native_view_host.h"
#include "views/widget/native_widget.h"
#include "views/widget/root_view.h"
#include "views/widget/widget.h"
namespace views {
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostWin, public:
NativeViewHostWin::NativeViewHostWin(NativeViewHost* host)
: host_(host),
installed_clip_(false) {
}
NativeViewHostWin::~NativeViewHostWin() {
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostWin, NativeViewHostWrapper implementation:
void NativeViewHostWin::NativeViewAttached() {
DCHECK(host_->native_view())
<< "Impossible detatched tab case; See crbug.com/6316";
// First hide the new window. We don't want anything to draw (like sub-hwnd
// borders), when we change the parent below.
ShowWindow(host_->native_view(), SW_HIDE);
Widget::ReparentNativeView(host_->native_view(),
host_->GetWidget()->GetNativeView());
host_->Layout();
}
void NativeViewHostWin::NativeViewDetaching(bool destroyed) {
if (!destroyed && installed_clip_)
UninstallClip();
installed_clip_ = false;
}
void NativeViewHostWin::AddedToWidget() {
if (!IsWindow(host_->native_view()))
return;
HWND parent_hwnd = GetParent(host_->native_view());
HWND widget_hwnd = host_->GetWidget()->GetNativeView();
if (parent_hwnd != widget_hwnd)
SetParent(host_->native_view(), widget_hwnd);
if (host_->IsVisibleInRootView())
ShowWindow(host_->native_view(), SW_SHOW);
else
ShowWindow(host_->native_view(), SW_HIDE);
host_->Layout();
}
void NativeViewHostWin::RemovedFromWidget() {
if (!IsWindow(host_->native_view()))
return;
ShowWindow(host_->native_view(), SW_HIDE);
SetParent(host_->native_view(), NULL);
}
void NativeViewHostWin::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(host_->native_view(), clip_region, TRUE);
installed_clip_ = true;
}
bool NativeViewHostWin::HasInstalledClip() {
return installed_clip_;
}
void NativeViewHostWin::UninstallClip() {
SetWindowRgn(host_->native_view(), 0, TRUE);
installed_clip_ = false;
}
void NativeViewHostWin::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(host_->native_view()))
swp_flags = (swp_flags | SWP_SHOWWINDOW) & ~SWP_NOREDRAW;
if (host_->fast_resize()) {
// In a fast resize, we move the window and clip it with SetWindowRgn.
RECT win_rect;
GetWindowRect(host_->native_view(), &win_rect);
gfx::Rect rect(win_rect);
SetWindowPos(host_->native_view(), 0, x, y, rect.width(), rect.height(),
swp_flags);
InstallClip(0, 0, w, h);
} else {
SetWindowPos(host_->native_view(), 0, x, y, w, h, swp_flags);
}
}
void NativeViewHostWin::HideWidget() {
if (!IsWindowVisible(host_->native_view()))
return; // Currently not visible, nothing to do.
// The window is currently visible, but its clipped by another view. Hide
// it.
SetWindowPos(host_->native_view(), 0, 0, 0, 0, 0,
SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER |
SWP_NOREDRAW | SWP_NOOWNERZORDER);
}
void NativeViewHostWin::SetFocus() {
::SetFocus(host_->native_view());
}
gfx::NativeViewAccessible NativeViewHostWin::GetNativeViewAccessible() {
HWND hwnd = host_->native_view();
if (!IsWindow(hwnd))
return NULL;
IAccessible* accessible = NULL;
HRESULT success = ::AccessibleObjectFromWindow(
hwnd, OBJID_CLIENT, IID_IAccessible,
reinterpret_cast<void**>(&accessible));
if (success == S_OK) {
return accessible;
} else {
return NULL;
}
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostWrapper, public:
// static
NativeViewHostWrapper* NativeViewHostWrapper::CreateWrapper(
NativeViewHost* host) {
return new NativeViewHostWin(host);
}
} // namespace views
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