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// Copyright (c) 2009 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.h"
#include "base/logging.h"
#include "gfx/canvas.h"
#include "views/controls/native/native_view_host_wrapper.h"
#include "views/controls/native/native_view_host_views.h"
#include "views/widget/root_view.h"
#include "views/widget/widget.h"
namespace views {
// static
const char NativeViewHost::kViewClassName[] = "views/NativeViewHost";
#if defined(OS_LINUX)
// GTK renders the focus.
// static
const bool NativeViewHost::kRenderNativeControlFocus = false;
#else
// static
const bool NativeViewHost::kRenderNativeControlFocus = true;
#endif
////////////////////////////////////////////////////////////////////////////////
// NativeViewHost, public:
NativeViewHost::NativeViewHost()
: native_view_(NULL),
views_view_(NULL),
fast_resize_(false),
focus_view_(NULL) {
// The native widget is placed relative to the root. As such, we need to
// know when the position of any ancestor changes, or our visibility relative
// to other views changed as it'll effect our position relative to the root.
SetNotifyWhenVisibleBoundsInRootChanges(true);
}
NativeViewHost::~NativeViewHost() {
}
void NativeViewHost::Attach(gfx::NativeView native_view) {
DCHECK(native_view);
DCHECK(!native_view_);
DCHECK(!views_view_);
native_view_ = native_view;
// If set_focus_view() has not been invoked, this view is the one that should
// be seen as focused when the native view receives focus.
if (!focus_view_)
focus_view_ = this;
native_wrapper_->NativeViewAttached();
}
void NativeViewHost::AttachToView(View* view) {
if (view == views_view_)
return;
DCHECK(view);
DCHECK(!native_view_);
DCHECK(!views_view_);
native_wrapper_.reset(new NativeViewHostViews(this));
views_view_ = view;
// If set_focus_view() has not been invoked, this view is the one that should
// be seen as focused when the native view receives focus.
if (!focus_view_)
focus_view_ = this;
native_wrapper_->NativeViewAttached();
}
void NativeViewHost::Detach() {
Detach(false);
}
void NativeViewHost::SetPreferredSize(const gfx::Size& size) {
preferred_size_ = size;
PreferredSizeChanged();
}
void NativeViewHost::NativeViewDestroyed() {
// Detach so we can clear our state and notify the native_wrapper_ to release
// ref on the native view.
Detach(true);
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHost, View overrides:
gfx::Size NativeViewHost::GetPreferredSize() {
return preferred_size_;
}
void NativeViewHost::Layout() {
if ((!native_view_ && !views_view_) || !native_wrapper_.get())
return;
gfx::Rect vis_bounds = GetVisibleBounds();
bool visible = !vis_bounds.IsEmpty();
if (visible && !fast_resize_) {
if (vis_bounds.size() != size()) {
// Only a portion of the Widget is really visible.
int x = vis_bounds.x();
int y = vis_bounds.y();
native_wrapper_->InstallClip(x, y, vis_bounds.width(),
vis_bounds.height());
} else if (native_wrapper_->HasInstalledClip()) {
// The whole widget is visible but we installed a clip on the widget,
// uninstall it.
native_wrapper_->UninstallClip();
}
}
if (visible) {
// Since widgets know nothing about the View hierarchy (they are direct
// children of the Widget that hosts our View hierarchy) they need to be
// positioned in the coordinate system of the Widget, not the current
// view. Also, they should be positioned respecting the border insets
// of the native view.
gfx::Insets insets = GetInsets();
gfx::Point top_left(insets.left(), insets.top());
ConvertPointToWidget(this, &top_left);
gfx::Rect local_bounds = GetLocalBounds(false);
native_wrapper_->ShowWidget(top_left.x(), top_left.y(),
local_bounds.width(),
local_bounds.height());
} else {
native_wrapper_->HideWidget();
}
}
void NativeViewHost::Paint(gfx::Canvas* canvas) {
// Paint background if there is one. NativeViewHost needs to paint
// a background when it is hosted in a TabbedPane. For Gtk implementation,
// NativeTabbedPaneGtk uses a WidgetGtk as page container and because
// WidgetGtk hook "expose" with its root view's paint, we need to
// fill the content. Otherwise, the tab page's background is not properly
// cleared. For Windows case, it appears okay to not paint background because
// we don't have a container window in-between. However if you want to use
// customized background, then this becomes necessary.
PaintBackground(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 native view, and the native
// view 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 (native_wrapper_->HasInstalledClip())
canvas->FillRectInt(SK_ColorWHITE, 0, 0, width(), height());
}
void NativeViewHost::VisibilityChanged(View* starting_from, bool is_visible) {
Layout();
}
void NativeViewHost::VisibleBoundsInRootChanged() {
Layout();
}
void NativeViewHost::ViewHierarchyChanged(bool is_add, View* parent,
View* child) {
if (is_add && GetWidget()) {
if (!native_wrapper_.get())
native_wrapper_.reset(NativeViewHostWrapper::CreateWrapper(this));
native_wrapper_->AddedToWidget();
} else if (!is_add) {
native_wrapper_->RemovedFromWidget();
}
}
std::string NativeViewHost::GetClassName() const {
return kViewClassName;
}
void NativeViewHost::Focus() {
native_wrapper_->SetFocus();
}
bool NativeViewHost::ContainsNativeView(gfx::NativeView native_view) const {
if (native_view == native_view_)
return true;
if (!native_view_)
return false;
views::Widget* native_widget =
views::Widget::GetWidgetFromNativeView(native_view_);
views::RootView* root_view =
native_widget ? native_widget->GetRootView() : NULL;
if (root_view && root_view->ContainsNativeView(native_view))
return true;
return View::ContainsNativeView(native_view);
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHost, private:
void NativeViewHost::Detach(bool destroyed) {
DCHECK(native_view_ || views_view_);
native_wrapper_->NativeViewDetaching(destroyed);
native_view_ = NULL;
views_view_ = NULL;
}
} // namespace views
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