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// Copyright 2014 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 "ui/views/controls/native/native_view_host_mac.h"
#import <Cocoa/Cocoa.h>
#include "base/mac/foundation_util.h"
#import "ui/views/cocoa/bridged_native_widget.h"
#include "ui/views/controls/native/native_view_host.h"
#include "ui/views/widget/native_widget_mac.h"
#include "ui/views/widget/widget.h"
namespace views {
namespace {
void EnsureNativeViewHasNoChildWidgets(NSView* native_view) {
DCHECK(native_view);
// Mac's NativeViewHost has no support for hosting its own child widgets.
// This check is probably overly restrictive, since the Widget containing the
// NativeViewHost _is_ allowed child Widgets. However, we don't know yet
// whether those child Widgets need to be distinguished from Widgets that code
// might want to associate with the hosted NSView instead.
{
Widget::Widgets child_widgets;
Widget::GetAllChildWidgets(native_view, &child_widgets);
CHECK_GE(1u, child_widgets.size()); // 1 (itself) or 0 if detached.
}
}
} // namespace
NativeViewHostMac::NativeViewHostMac(NativeViewHost* host) : host_(host) {
}
NativeViewHostMac::~NativeViewHostMac() {
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostMac, NativeViewHostWrapper implementation:
void NativeViewHostMac::AttachNativeView() {
DCHECK(host_->native_view());
DCHECK(!native_view_);
native_view_.reset([host_->native_view() retain]);
EnsureNativeViewHasNoChildWidgets(native_view_);
BridgedNativeWidget* bridge = NativeWidgetMac::GetBridgeForNativeWindow(
host_->GetWidget()->GetNativeWindow());
DCHECK(bridge);
[bridge->ns_view() addSubview:native_view_];
bridge->SetAssociationForView(host_, native_view_);
}
void NativeViewHostMac::NativeViewDetaching(bool destroyed) {
// |destroyed| is only true if this class calls host_->NativeViewDestroyed().
// Aura does this after observing an aura OnWindowDestroying, but NSViews
// are reference counted so there isn't a reliable signal. Instead, a
// reference is retained until the NativeViewHost is detached.
DCHECK(!destroyed);
// |native_view_| can be nil here if RemovedFromWidget() is called before
// NativeViewHost::Detach().
DCHECK(!native_view_ || native_view_ == host_->native_view());
[host_->native_view() setHidden:YES];
[host_->native_view() removeFromSuperview];
EnsureNativeViewHasNoChildWidgets(host_->native_view());
BridgedNativeWidget* bridge = NativeWidgetMac::GetBridgeForNativeWindow(
host_->GetWidget()->GetNativeWindow());
// BridgedNativeWidget can be null when Widget is closing.
if (bridge)
bridge->ClearAssociationForView(host_);
native_view_.reset();
}
void NativeViewHostMac::AddedToWidget() {
if (!host_->native_view())
return;
AttachNativeView();
host_->Layout();
}
void NativeViewHostMac::RemovedFromWidget() {
if (!host_->native_view())
return;
NativeViewDetaching(false);
}
void NativeViewHostMac::InstallClip(int x, int y, int w, int h) {
NOTIMPLEMENTED();
}
bool NativeViewHostMac::HasInstalledClip() {
return false;
}
void NativeViewHostMac::UninstallClip() {
NOTIMPLEMENTED();
}
void NativeViewHostMac::ShowWidget(int x, int y, int w, int h) {
if (host_->fast_resize())
NOTIMPLEMENTED();
// Coordinates will be from the top left of the parent Widget. The NativeView
// is already in the same NSWindow, so just flip to get Cooca coordinates and
// then convert to the containing view.
NSRect window_rect = NSMakeRect(
x,
host_->GetWidget()->GetClientAreaBoundsInScreen().height() - y - h,
w,
h);
// Convert window coordinates to the hosted view's superview, since that's how
// coordinates of the hosted view's frame is based.
NSRect container_rect =
[[host_->native_view() superview] convertRect:window_rect fromView:nil];
[host_->native_view() setFrame:container_rect];
[host_->native_view() setHidden:NO];
}
void NativeViewHostMac::HideWidget() {
[host_->native_view() setHidden:YES];
}
void NativeViewHostMac::SetFocus() {
if ([host_->native_view() acceptsFirstResponder])
[[host_->native_view() window] makeFirstResponder:host_->native_view()];
}
gfx::NativeViewAccessible NativeViewHostMac::GetNativeViewAccessible() {
return NULL;
}
gfx::NativeCursor NativeViewHostMac::GetCursor(int x, int y) {
// Intentionally not implemented: Not required on non-aura Mac because OSX
// will query the native view for the cursor directly. For NativeViewHostMac
// in practice, OSX will retrieve the cursor that was last set by
// -[RenderWidgetHostViewCocoa updateCursor:] whenever the pointer is over the
// hosted view. With some plumbing, NativeViewHostMac could return that same
// cursor here, but it doesn't achieve anything. The implications of returning
// null simply mean that the "fallback" cursor on the window itself will be
// cleared (see -[NativeWidgetMacNSWindow cursorUpdate:]). However, while the
// pointer is over a RenderWidgetHostViewCocoa, OSX won't ask for the fallback
// cursor.
return gfx::kNullCursor;
}
// static
NativeViewHostWrapper* NativeViewHostWrapper::CreateWrapper(
NativeViewHost* host) {
return new NativeViewHostMac(host);
}
} // namespace views
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