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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_gtk.h"
#include <gtk/gtk.h>
#include <algorithm>
#include "base/logging.h"
#include "views/controls/native/native_view_host.h"
#include "views/focus/focus_manager.h"
#include "views/widget/widget_gtk.h"
namespace views {
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostGtk, public:
NativeViewHostGtk::NativeViewHostGtk(NativeViewHost* host)
: host_(host),
installed_clip_(false),
destroy_signal_id_(0),
focus_signal_id_(0),
fixed_(NULL) {
CreateFixed(false);
}
NativeViewHostGtk::~NativeViewHostGtk() {
if (fixed_)
gtk_widget_destroy(fixed_);
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostGtk, NativeViewHostWrapper implementation:
void NativeViewHostGtk::NativeViewAttached() {
DCHECK(host_->native_view());
if (gtk_widget_get_parent(host_->native_view()))
gtk_widget_reparent(host_->native_view(), fixed_);
else
gtk_container_add(GTK_CONTAINER(fixed_), host_->native_view());
if (!destroy_signal_id_) {
destroy_signal_id_ = g_signal_connect(G_OBJECT(host_->native_view()),
"destroy", G_CALLBACK(CallDestroy),
this);
}
if (!focus_signal_id_) {
focus_signal_id_ = g_signal_connect(G_OBJECT(host_->focus_native_view()),
"focus-in-event",
G_CALLBACK(CallFocusIn), this);
}
// Always layout though.
host_->Layout();
// We own the native view as long as it's attached, so that we can safely
// reparent it in multiple passes.
gtk_widget_ref(host_->native_view());
// TODO(port): figure out focus.
}
void NativeViewHostGtk::NativeViewDetaching() {
DCHECK(host_->native_view());
g_signal_handler_disconnect(G_OBJECT(host_->native_view()),
destroy_signal_id_);
destroy_signal_id_ = 0;
g_signal_handler_disconnect(G_OBJECT(host_->focus_native_view()),
focus_signal_id_);
focus_signal_id_ = 0;
installed_clip_ = false;
g_object_unref(G_OBJECT(host_->native_view()));
}
void NativeViewHostGtk::AddedToWidget() {
if (!fixed_)
CreateFixed(false);
if (gtk_widget_get_parent(fixed_))
GetHostWidget()->ReparentChild(fixed_);
else
GetHostWidget()->AddChild(fixed_);
if (!host_->native_view())
return;
if (gtk_widget_get_parent(host_->native_view()))
gtk_widget_reparent(host_->native_view(), fixed_);
else
gtk_container_add(GTK_CONTAINER(fixed_), host_->native_view());
if (host_->IsVisibleInRootView())
gtk_widget_show(fixed_);
else
gtk_widget_hide(fixed_);
host_->Layout();
}
void NativeViewHostGtk::RemovedFromWidget() {
if (!host_->native_view())
return;
DestroyFixed();
}
void NativeViewHostGtk::InstallClip(int x, int y, int w, int h) {
DCHECK(w > 0 && h > 0);
installed_clip_bounds_.SetRect(x, y, w, h);
installed_clip_ = true;
// We only re-create the fixed with a window when a cliprect is installed.
// Because the presence of a X Window will prevent transparency from working
// properly, we only want it to be active for the duration of a clip
// (typically during animations and scrolling.)
CreateFixed(true);
}
bool NativeViewHostGtk::HasInstalledClip() {
return installed_clip_;
}
void NativeViewHostGtk::UninstallClip() {
installed_clip_ = false;
// We now re-create the fixed without a X Window so transparency works again.
CreateFixed(false);
}
void NativeViewHostGtk::ShowWidget(int x, int y, int w, int h) {
// x and y are the desired position of host_ in WidgetGtk coordiantes.
int fixed_x = x;
int fixed_y = y;
int fixed_w = w;
int fixed_h = h;
int child_x = 0;
int child_y = 0;
int child_w = w;
int child_h = h;
if (installed_clip_) {
child_x = -installed_clip_bounds_.x();
child_y = -installed_clip_bounds_.y();
fixed_x += -child_x;
fixed_y += -child_y;
fixed_w = std::min(installed_clip_bounds_.width(), w);
fixed_h = std::min(installed_clip_bounds_.height(), h);
}
// Size and place the fixed_.
GetHostWidget()->PositionChild(fixed_, fixed_x, fixed_y, fixed_w, fixed_h);
// Size and place the hosted NativeView.
gtk_widget_set_size_request(host_->native_view(), child_w, child_h);
gtk_fixed_move(GTK_FIXED(fixed_), host_->native_view(), child_x, child_y);
gtk_widget_show(fixed_);
gtk_widget_show(host_->native_view());
}
void NativeViewHostGtk::HideWidget() {
gtk_widget_hide(fixed_);
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostGtk, private:
void NativeViewHostGtk::CreateFixed(bool needs_window) {
DestroyFixed();
fixed_ = gtk_fixed_new();
gtk_fixed_set_has_window(GTK_FIXED(fixed_), needs_window);
// Defeat refcounting. We need to own the fixed.
gtk_widget_ref(fixed_);
WidgetGtk* widget_gtk = GetHostWidget();
if (widget_gtk)
widget_gtk->AddChild(fixed_);
if (host_->native_view())
gtk_container_add(GTK_CONTAINER(fixed_), host_->native_view());
}
void NativeViewHostGtk::DestroyFixed() {
if (!fixed_)
return;
gtk_widget_hide(fixed_);
GetHostWidget()->RemoveChild(fixed_);
if (host_->native_view()) {
// We can safely remove the widget from its container since we own the
// widget from the moment it is attached.
gtk_container_remove(GTK_CONTAINER(fixed_), host_->native_view());
}
gtk_widget_destroy(fixed_);
fixed_ = NULL;
}
WidgetGtk* NativeViewHostGtk::GetHostWidget() const {
return static_cast<WidgetGtk*>(host_->GetWidget());
}
// static
void NativeViewHostGtk::CallDestroy(GtkObject* object,
NativeViewHostGtk* host) {
host->host_->NativeViewDestroyed();
}
// static
gboolean NativeViewHostGtk::CallFocusIn(GtkWidget* widget,
GdkEventFocus* event,
NativeViewHostGtk* host) {
host->host_->GotNativeFocus();
return false;
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHostWrapper, public:
// static
NativeViewHostWrapper* NativeViewHostWrapper::CreateWrapper(
NativeViewHost* host) {
return new NativeViewHostGtk(host);
}
} // namespace views
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