// 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 "ui/views/widget/native_widget_gtk.h"
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/extensions/shape.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <set>
#include <vector>
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/message_loop.h"
#include "base/utf_string_conversions.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/dragdrop/os_exchange_data_provider_gtk.h"
#include "ui/base/gtk/g_object_destructor_filo.h"
#include "ui/base/gtk/gtk_signal_registrar.h"
#include "ui/base/gtk/gtk_windowing.h"
#include "ui/base/gtk/scoped_handle_gtk.h"
#include "ui/base/hit_test.h"
#include "ui/base/x/active_window_watcher_x.h"
#include "ui/base/x/x11_util.h"
#include "ui/gfx/canvas_skia_paint.h"
#include "ui/gfx/compositor/compositor.h"
#include "ui/gfx/gtk_util.h"
#include "ui/gfx/path.h"
#include "ui/gfx/screen.h"
#include "ui/views/bubble/bubble_delegate.h"
#include "ui/views/controls/textfield/native_textfield_views.h"
#include "ui/views/focus/view_storage.h"
#include "ui/views/ime/input_method_gtk.h"
#include "ui/views/views_delegate.h"
#include "ui/views/widget/drop_target_gtk.h"
#include "ui/views/widget/gtk_views_fixed.h"
#include "ui/views/widget/gtk_views_window.h"
#include "ui/views/widget/root_view.h"
#include "ui/views/widget/tooltip_manager_gtk.h"
#include "ui/views/widget/widget_delegate.h"
#if defined(HAVE_IBUS)
#include "ui/views/ime/input_method_ibus.h"
#endif
using ui::OSExchangeData;
using ui::OSExchangeDataProviderGtk;
using ui::ActiveWindowWatcherX;
namespace views {
namespace {
// Links the GtkWidget to its NativeWidget.
const char* const kNativeWidgetKey = "__VIEWS_NATIVE_WIDGET__";
// A g_object data key to associate a CompositePainter object to a GtkWidget.
const char* kCompositePainterKey = "__VIEWS_COMPOSITE_PAINTER__";
// A g_object data key to associate the flag whether or not the widget
// is composited to a GtkWidget. gtk_widget_is_composited simply tells
// if x11 supports composition and cannot be used to tell if given widget
// is composited.
const char* kCompositeEnabledKey = "__VIEWS_COMPOSITE_ENABLED__";
// A g_object data key to associate the expose handler id that is
// used to remove FREEZE_UPDATE property on the window.
const char* kExposeHandlerIdKey = "__VIEWS_EXPOSE_HANDLER_ID__";
// CompositePainter draws a composited child widgets image into its
// drawing area. This object is created at most once for a widget and kept
// until the widget is destroyed.
class CompositePainter {
public:
explicit CompositePainter(GtkWidget* parent)
: parent_object_(G_OBJECT(parent)) {
handler_id_ = g_signal_connect_after(
parent_object_, "expose_event", G_CALLBACK(OnCompositePaint), NULL);
}
static void AddCompositePainter(GtkWidget* widget) {
CompositePainter* painter = static_cast<CompositePainter*>(
g_object_get_data(G_OBJECT(widget), kCompositePainterKey));
if (!painter) {
g_object_set_data(G_OBJECT(widget), kCompositePainterKey,
new CompositePainter(widget));
g_signal_connect(widget, "destroy",
G_CALLBACK(&DestroyPainter), NULL);
}
}
// Set the composition flag.
static void SetComposited(GtkWidget* widget) {
g_object_set_data(G_OBJECT(widget), kCompositeEnabledKey,
const_cast<char*>(""));
}
// Returns true if the |widget| is composited and ready to be drawn.
static bool IsComposited(GtkWidget* widget) {
return g_object_get_data(G_OBJECT(widget), kCompositeEnabledKey) != NULL;
}
private:
virtual ~CompositePainter() {}
// Composes a image from one child.
static void CompositeChildWidget(GtkWidget* child, gpointer data) {
GdkEventExpose* event = static_cast<GdkEventExpose*>(data);
GtkWidget* parent = gtk_widget_get_parent(child);
DCHECK(parent);
if (IsComposited(child)) {
cairo_t* cr = gdk_cairo_create(parent->window);
gdk_cairo_set_source_pixmap(cr, child->window,
child->allocation.x,
child->allocation.y);
GdkRegion* region = gdk_region_rectangle(&child->allocation);
gdk_region_intersect(region, event->region);
gdk_cairo_region(cr, region);
cairo_clip(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_paint(cr);
cairo_destroy(cr);
}
}
// Expose-event handler that compose & draws children's image into
// the |parent|'s drawing area.
static gboolean OnCompositePaint(GtkWidget* parent, GdkEventExpose* event) {
gtk_container_foreach(GTK_CONTAINER(parent),
CompositeChildWidget,
event);
return false;
}
static void DestroyPainter(GtkWidget* object) {
CompositePainter* painter = reinterpret_cast<CompositePainter*>(
g_object_get_data(G_OBJECT(object), kCompositePainterKey));
DCHECK(painter);
delete painter;
}
GObject* parent_object_;
gulong handler_id_;
DISALLOW_COPY_AND_ASSIGN(CompositePainter);
};
void EnumerateChildWidgetsForNativeWidgets(GtkWidget* child_widget,
gpointer param) {
// Walk child widgets, if necessary.
if (GTK_IS_CONTAINER(child_widget)) {
gtk_container_foreach(GTK_CONTAINER(child_widget),
EnumerateChildWidgetsForNativeWidgets,
param);
}
Widget* widget = Widget::GetWidgetForNativeView(child_widget);
if (widget) {
Widget::Widgets* widgets = reinterpret_cast<Widget::Widgets*>(param);
widgets->insert(widget);
}
}
GtkWindowType WindowTypeToGtkWindowType(Widget::InitParams::Type type) {
switch (type) {
case Widget::InitParams::TYPE_BUBBLE:
case Widget::InitParams::TYPE_WINDOW:
case Widget::InitParams::TYPE_WINDOW_FRAMELESS:
return GTK_WINDOW_TOPLEVEL;
default:
return GTK_WINDOW_POPUP;
}
NOTREACHED();
return GTK_WINDOW_TOPLEVEL;
}
// Converts a Windows-style hit test result code into a GDK window edge.
GdkWindowEdge HitTestCodeToGDKWindowEdge(int hittest_code) {
switch (hittest_code) {
case HTBOTTOM:
return GDK_WINDOW_EDGE_SOUTH;
case HTBOTTOMLEFT:
return GDK_WINDOW_EDGE_SOUTH_WEST;
case HTBOTTOMRIGHT:
case HTGROWBOX:
return GDK_WINDOW_EDGE_SOUTH_EAST;
case HTLEFT:
return GDK_WINDOW_EDGE_WEST;
case HTRIGHT:
return GDK_WINDOW_EDGE_EAST;
case HTTOP:
return GDK_WINDOW_EDGE_NORTH;
case HTTOPLEFT:
return GDK_WINDOW_EDGE_NORTH_WEST;
case HTTOPRIGHT:
return GDK_WINDOW_EDGE_NORTH_EAST;
default:
NOTREACHED();
break;
}
// Default to something defaultish.
return HitTestCodeToGDKWindowEdge(HTGROWBOX);
}
// Converts a Windows-style hit test result code into a GDK cursor type.
GdkCursorType HitTestCodeToGdkCursorType(int hittest_code) {
switch (hittest_code) {
case HTBOTTOM:
return GDK_BOTTOM_SIDE;
case HTBOTTOMLEFT:
return GDK_BOTTOM_LEFT_CORNER;
case HTBOTTOMRIGHT:
case HTGROWBOX:
return GDK_BOTTOM_RIGHT_CORNER;
case HTLEFT:
return GDK_LEFT_SIDE;
case HTRIGHT:
return GDK_RIGHT_SIDE;
case HTTOP:
return GDK_TOP_SIDE;
case HTTOPLEFT:
return GDK_TOP_LEFT_CORNER;
case HTTOPRIGHT:
return GDK_TOP_RIGHT_CORNER;
default:
break;
}
// Default to something defaultish.
return GDK_LEFT_PTR;
}
} // namespace
// During drag and drop GTK sends a drag-leave during a drop. This means we
// have no way to tell the difference between a normal drag leave and a drop.
// To work around that we listen for DROP_START, then ignore the subsequent
// drag-leave that GTK generates.
class NativeWidgetGtk::DropObserver : public MessageLoopForUI::Observer {
public:
DropObserver() {}
static DropObserver* GetInstance() {
return Singleton<DropObserver>::get();
}
virtual void WillProcessEvent(GdkEvent* event) {
if (event->type == GDK_DROP_START) {
NativeWidgetGtk* widget = GetNativeWidgetGtkForEvent(event);
if (widget)
widget->ignore_drag_leave_ = true;
}
}
virtual void DidProcessEvent(GdkEvent* event) {
}
private:
NativeWidgetGtk* GetNativeWidgetGtkForEvent(GdkEvent* event) {
GtkWidget* gtk_widget = gtk_get_event_widget(event);
if (!gtk_widget)
return NULL;
return static_cast<NativeWidgetGtk*>(
internal::NativeWidgetPrivate::GetNativeWidgetForNativeView(
gtk_widget));
}
DISALLOW_COPY_AND_ASSIGN(DropObserver);
};
// Returns the position of a widget on screen.
static void GetWidgetPositionOnScreen(GtkWidget* widget, int* x, int *y) {
// First get the root window.
GtkWidget* root = widget;
while (root && !GTK_IS_WINDOW(root)) {
root = gtk_widget_get_parent(root);
}
if (!root) {
// If root is null we're not parented. Return 0x0 and assume the caller will
// query again when we're parented.
*x = *y = 0;
return;
}
// Translate the coordinate from widget to root window.
gtk_widget_translate_coordinates(widget, root, 0, 0, x, y);
// Then adjust the position with the position of the root window.
int window_x, window_y;
gtk_window_get_position(GTK_WINDOW(root), &window_x, &window_y);
*x += window_x;
*y += window_y;
}
// "expose-event" handler of drag icon widget that renders drag image pixbuf.
static gboolean DragIconWidgetPaint(GtkWidget* widget,
GdkEventExpose* event,
gpointer data) {
GdkPixbuf* pixbuf = reinterpret_cast<GdkPixbuf*>(data);
cairo_t* cr = gdk_cairo_create(widget->window);
gdk_cairo_region(cr, event->region);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
gdk_cairo_set_source_pixbuf(cr, pixbuf, 0.0, 0.0);
cairo_paint(cr);
cairo_destroy(cr);
return true;
}
// Creates a drag icon widget that draws drag_image.
static GtkWidget* CreateDragIconWidget(GdkPixbuf* drag_image) {
GdkColormap* rgba_colormap =
gdk_screen_get_rgba_colormap(gdk_screen_get_default());
if (!rgba_colormap)
return NULL;
GtkWidget* drag_widget = gtk_window_new(GTK_WINDOW_POPUP);
gtk_widget_set_colormap(drag_widget, rgba_colormap);
gtk_widget_set_app_paintable(drag_widget, true);
gtk_widget_set_size_request(drag_widget,
gdk_pixbuf_get_width(drag_image),
gdk_pixbuf_get_height(drag_image));
g_signal_connect(G_OBJECT(drag_widget), "expose-event",
G_CALLBACK(&DragIconWidgetPaint), drag_image);
return drag_widget;
}
// static
GtkWidget* NativeWidgetGtk::null_parent_ = NULL;
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetGtk, public:
NativeWidgetGtk::NativeWidgetGtk(internal::NativeWidgetDelegate* delegate)
: delegate_(delegate),
widget_(NULL),
window_contents_(NULL),
child_(false),
ALLOW_THIS_IN_INITIALIZER_LIST(close_widget_factory_(this)),
ownership_(Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET),
transparent_(false),
ignore_events_(false),
ignore_drag_leave_(false),
opacity_(255),
drag_data_(NULL),
window_state_(GDK_WINDOW_STATE_WITHDRAWN),
is_active_(false),
transient_to_parent_(false),
got_initial_focus_in_(false),
has_focus_(false),
always_on_top_(false),
is_double_buffered_(false),
should_handle_menu_key_release_(false),
dragged_view_(NULL),
painted_(false),
has_pointer_grab_(false),
has_keyboard_grab_(false),
grab_notify_signal_id_(0),
is_menu_(false),
signal_registrar_(new ui::GtkSignalRegistrar) {
static bool installed_message_loop_observer = false;
if (!installed_message_loop_observer) {
installed_message_loop_observer = true;
MessageLoopForUI* loop = MessageLoopForUI::current();
if (loop)
loop->AddObserver(DropObserver::GetInstance());
}
}
NativeWidgetGtk::~NativeWidgetGtk() {
// We need to delete the input method before calling DestroyRootView(),
// because it'll set focus_manager_ to NULL.
if (ownership_ == Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET) {
DCHECK(widget_ == NULL);
delete delegate_;
} else {
// Disconnect from GObjectDestructorFILO because we're
// deleting the NativeWidgetGtk.
bool has_widget = !!widget_;
if (has_widget)
ui::GObjectDestructorFILO::GetInstance()->Disconnect(
G_OBJECT(widget_), &OnDestroyedThunk, this);
CloseNow();
// Call OnNativeWidgetDestroyed because we're not calling
// OnDestroyedThunk
if (has_widget)
delegate_->OnNativeWidgetDestroyed();
}
}
GtkWindow* NativeWidgetGtk::GetTransientParent() const {
return (!child_ && widget_) ?
gtk_window_get_transient_for(GTK_WINDOW(widget_)) : NULL;
}
bool NativeWidgetGtk::MakeTransparent() {
// Transparency can only be enabled only if we haven't realized the widget.
DCHECK(!widget_);
if (!gdk_screen_is_composited(gdk_screen_get_default())) {
// Transparency is only supported for compositing window managers.
// NOTE: there's a race during ChromeOS startup such that X might think
// compositing isn't supported. We ignore it if the wm says compositing
// isn't supported.
DLOG(WARNING) << "compositing not supported; allowing anyway";
}
if (!gdk_screen_get_rgba_colormap(gdk_screen_get_default())) {
// We need rgba to make the window transparent.
return false;
}
transparent_ = true;
return true;
}
void NativeWidgetGtk::EnableDoubleBuffer(bool enabled) {
is_double_buffered_ = enabled;
if (window_contents_) {
if (is_double_buffered_)
GTK_WIDGET_SET_FLAGS(window_contents_, GTK_DOUBLE_BUFFERED);
else
GTK_WIDGET_UNSET_FLAGS(window_contents_, GTK_DOUBLE_BUFFERED);
}
}
void NativeWidgetGtk::AddChild(GtkWidget* child) {
gtk_container_add(GTK_CONTAINER(window_contents_), child);
}
void NativeWidgetGtk::RemoveChild(GtkWidget* child) {
// We can be called after the contents widget has been destroyed, e.g. any
// NativeViewHost not removed from the view hierarchy before the window is
// closed.
if (GTK_IS_CONTAINER(window_contents_)) {
gtk_container_remove(GTK_CONTAINER(window_contents_), child);
gtk_views_fixed_set_widget_size(child, 0, 0);
}
}
void NativeWidgetGtk::ReparentChild(GtkWidget* child) {
gtk_widget_reparent(child, window_contents_);
}
void NativeWidgetGtk::PositionChild(GtkWidget* child, int x, int y, int w,
int h) {
gtk_views_fixed_set_widget_size(child, w, h);
gtk_fixed_move(GTK_FIXED(window_contents_), child, x, y);
}
void NativeWidgetGtk::DoDrag(const OSExchangeData& data, int operation) {
const OSExchangeDataProviderGtk& data_provider =
static_cast<const OSExchangeDataProviderGtk&>(data.provider());
GtkTargetList* targets = data_provider.GetTargetList();
GdkEvent* current_event = gtk_get_current_event();
const OSExchangeDataProviderGtk& provider(
static_cast<const OSExchangeDataProviderGtk&>(data.provider()));
GdkDragContext* context = gtk_drag_begin(
window_contents_,
targets,
static_cast<GdkDragAction>(
ui::DragDropTypes::DragOperationToGdkDragAction(operation)),
1,
current_event);
GtkWidget* drag_icon_widget = NULL;
// Set the drag image if one was supplied.
if (provider.drag_image()) {
drag_icon_widget = CreateDragIconWidget(provider.drag_image());
if (drag_icon_widget) {
// Use a widget as the drag icon when compositing is enabled for proper
// transparency handling.
g_object_ref(provider.drag_image());
gtk_drag_set_icon_widget(context,
drag_icon_widget,
provider.cursor_offset().x(),
provider.cursor_offset().y());
} else {
gtk_drag_set_icon_pixbuf(context,
provider.drag_image(),
provider.cursor_offset().x(),
provider.cursor_offset().y());
}
}
if (current_event)
gdk_event_free(current_event);
gtk_target_list_unref(targets);
drag_data_ = &data_provider;
// Block the caller until drag is done by running a nested message loop.
MessageLoopForUI::current()->RunWithDispatcher(NULL);
drag_data_ = NULL;
if (drag_icon_widget) {
gtk_widget_destroy(drag_icon_widget);
g_object_unref(provider.drag_image());
}
}
void NativeWidgetGtk::OnActiveChanged() {
delegate_->OnNativeWidgetActivationChanged(IsActive());
}
void NativeWidgetGtk::ResetDropTarget() {
ignore_drag_leave_ = false;
drop_target_.reset(NULL);
}
void NativeWidgetGtk::GetRequestedSize(gfx::Size* out) const {
int width, height;
if (GTK_IS_VIEWS_FIXED(widget_) &&
gtk_views_fixed_get_widget_size(GetNativeView(), &width, &height)) {
out->SetSize(width, height);
} else {
GtkRequisition requisition;
gtk_widget_get_child_requisition(GetNativeView(), &requisition);
out->SetSize(requisition.width, requisition.height);
}
}
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetGtk, ActiveWindowWatcherXObserver implementation:
void NativeWidgetGtk::ActiveWindowChanged(GdkWindow* active_window) {
if (!GetNativeView())
return;
bool was_active = IsActive();
is_active_ = (active_window == GTK_WIDGET(GetNativeView())->window);
if (!is_active_ && active_window && !child_) {
// We're not active, but the force the window to be rendered as active if
// a child window is transient to us.
gpointer data = NULL;
gdk_window_get_user_data(active_window, &data);
GtkWidget* widget = reinterpret_cast<GtkWidget*>(data);
is_active_ =
(widget && GTK_IS_WINDOW(widget) &&
gtk_window_get_transient_for(GTK_WINDOW(widget)) == GTK_WINDOW(
widget_));
}
if (was_active != IsActive()) {
OnActiveChanged();
GetWidget()->GetRootView()->SchedulePaint();
}
}
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetGtk implementation:
bool NativeWidgetGtk::HandleKeyboardEvent(const KeyEvent& key) {
if (!GetWidget()->GetFocusManager())
return false;
const int key_code = key.key_code();
bool handled = false;
// Always reset |should_handle_menu_key_release_| unless we are handling a
// VKEY_MENU key release event. It ensures that VKEY_MENU accelerator can only
// be activated when handling a VKEY_MENU key release event which is preceded
// by an un-handled VKEY_MENU key press event.
if (key_code != ui::VKEY_MENU || key.type() != ui::ET_KEY_RELEASED)
should_handle_menu_key_release_ = false;
if (key.type() == ui::ET_KEY_PRESSED) {
// VKEY_MENU is triggered by key release event.
// FocusManager::OnKeyEvent() returns false when the key has been consumed.
if (key_code != ui::VKEY_MENU)
handled = !GetWidget()->GetFocusManager()->OnKeyEvent(key);
else
should_handle_menu_key_release_ = true;
} else if (key_code == ui::VKEY_MENU && should_handle_menu_key_release_ &&
(key.flags() & ~ui::EF_ALT_DOWN) == 0) {
// Trigger VKEY_MENU when only this key is pressed and released, and both
// press and release events are not handled by others.
ui::Accelerator accelerator(ui::VKEY_MENU, false, false, false);
handled = GetWidget()->GetFocusManager()->ProcessAccelerator(accelerator);
}
return handled;
}
bool NativeWidgetGtk::SuppressFreezeUpdates() {
if (!painted_) {
painted_ = true;
return true;
}
return false;
}
// static
void NativeWidgetGtk::UpdateFreezeUpdatesProperty(GtkWindow* window,
bool enable) {
if (!GTK_WIDGET_REALIZED(GTK_WIDGET(window)))
gtk_widget_realize(GTK_WIDGET(window));
GdkWindow* gdk_window = GTK_WIDGET(window)->window;
static GdkAtom freeze_atom_ =
gdk_atom_intern("_CHROME_FREEZE_UPDATES", FALSE);
if (enable) {
VLOG(1) << "setting FREEZE UPDATES property. xid=" <<
GDK_WINDOW_XID(gdk_window);
int32 val = 1;
gdk_property_change(gdk_window,
freeze_atom_,
freeze_atom_,
32,
GDK_PROP_MODE_REPLACE,
reinterpret_cast<const guchar*>(&val),
1);
} else {
VLOG(1) << "deleting FREEZE UPDATES property. xid=" <<
GDK_WINDOW_XID(gdk_window);
gdk_property_delete(gdk_window, freeze_atom_);
}
}
// static
void NativeWidgetGtk::RegisterChildExposeHandler(GtkWidget* child) {
UnregisterChildExposeHandler(child);
gulong id = g_signal_connect_after(child, "expose-event",
G_CALLBACK(&ChildExposeHandler), NULL);
g_object_set_data(G_OBJECT(child), kExposeHandlerIdKey,
reinterpret_cast<void*>(id));
}
// static
void NativeWidgetGtk::UnregisterChildExposeHandler(GtkWidget* child) {
gulong id = reinterpret_cast<gulong>(g_object_get_data(G_OBJECT(child),
kExposeHandlerIdKey));
if (id) {
g_signal_handler_disconnect(G_OBJECT(child), id);
g_object_set_data(G_OBJECT(child), kExposeHandlerIdKey, 0);
}
}
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetGtk, NativeWidget implementation:
void NativeWidgetGtk::InitNativeWidget(const Widget::InitParams& params) {
SetInitParams(params);
Widget::InitParams modified_params = params;
if (params.parent_widget) {
NativeWidgetGtk* parent_gtk =
static_cast<NativeWidgetGtk*>(params.parent_widget->native_widget());
modified_params.parent = child_ ? parent_gtk->window_contents()
: params.parent_widget->GetNativeView();
}
if (!child_)
ActiveWindowWatcherX::AddObserver(this);
// Make container here.
CreateGtkWidget(modified_params);
if (params.type == Widget::InitParams::TYPE_MENU) {
gtk_window_set_destroy_with_parent(GTK_WINDOW(GetNativeView()), TRUE);
gtk_window_set_type_hint(GTK_WINDOW(GetNativeView()),
GDK_WINDOW_TYPE_HINT_MENU);
}
if (View::get_use_acceleration_when_possible()) {
if (ui::Compositor::compositor_factory()) {
compositor_ = (*ui::Compositor::compositor_factory())(this);
} else {
gint width, height;
gdk_drawable_get_size(window_contents_->window, &width, &height);
compositor_ = ui::Compositor::Create(this,
GDK_WINDOW_XID(window_contents_->window),
gfx::Size(width, height));
}
if (compositor_.get()) {
View* root_view = delegate_->AsWidget()->GetRootView();
root_view->SetPaintToLayer(true);
compositor_->SetRootLayer(root_view->layer());
root_view->SetFillsBoundsOpaquely(!transparent_);
}
}
delegate_->OnNativeWidgetCreated();
if (opacity_ != 255)
SetOpacity(opacity_);
// Make sure we receive our motion events.
// In general we register most events on the parent of all widgets. At a
// minimum we need painting to happen on the parent (otherwise painting
// doesn't work at all), and similarly we need mouse release events on the
// parent as windows don't get mouse releases.
gtk_widget_add_events(window_contents_,
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_KEY_PRESS_MASK |
GDK_KEY_RELEASE_MASK);
signal_registrar_->ConnectAfter(G_OBJECT(window_contents_), "size_request",
G_CALLBACK(&OnSizeRequestThunk), this);
signal_registrar_->ConnectAfter(G_OBJECT(window_contents_), "size_allocate",
G_CALLBACK(&OnSizeAllocateThunk), this);
gtk_widget_set_app_paintable(window_contents_, true);
signal_registrar_->Connect(window_contents_, "expose_event",
G_CALLBACK(&OnPaintThunk), this);
signal_registrar_->Connect(window_contents_, "enter_notify_event",
G_CALLBACK(&OnEnterNotifyThunk), this);
signal_registrar_->Connect(window_contents_, "leave_notify_event",
G_CALLBACK(&OnLeaveNotifyThunk), this);
signal_registrar_->Connect(window_contents_, "motion_notify_event",
G_CALLBACK(&OnMotionNotifyThunk), this);
signal_registrar_->Connect(window_contents_, "button_press_event",
G_CALLBACK(&OnButtonPressThunk), this);
signal_registrar_->Connect(window_contents_, "button_release_event",
G_CALLBACK(&OnButtonReleaseThunk), this);
signal_registrar_->Connect(window_contents_, "grab_broken_event",
G_CALLBACK(&OnGrabBrokeEventThunk), this);
signal_registrar_->Connect(window_contents_, "scroll_event",
G_CALLBACK(&OnScrollThunk), this);
signal_registrar_->Connect(window_contents_, "visibility_notify_event",
G_CALLBACK(&OnVisibilityNotifyThunk), this);
// In order to receive notification when the window is no longer the front
// window, we need to install these on the widget.
// NOTE: this doesn't work with focus follows mouse.
signal_registrar_->Connect(widget_, "focus_in_event",
G_CALLBACK(&OnFocusInThunk), this);
signal_registrar_->Connect(widget_, "focus_out_event",
G_CALLBACK(&OnFocusOutThunk), this);
signal_registrar_->Connect(widget_, "destroy",
G_CALLBACK(&OnDestroyThunk), this);
signal_registrar_->Connect(widget_, "show",
G_CALLBACK(&OnShowThunk), this);
signal_registrar_->Connect(widget_, "map",
G_CALLBACK(&OnMapThunk), this);
signal_registrar_->Connect(widget_, "hide",
G_CALLBACK(&OnHideThunk), this);
signal_registrar_->Connect(widget_, "configure-event",
G_CALLBACK(&OnConfigureEventThunk), this);
// Views/FocusManager (re)sets the focus to the root window,
// so we need to connect signal handlers to the gtk window.
// See views::Views::Focus and views::FocusManager::ClearNativeFocus
// for more details.
signal_registrar_->Connect(widget_, "key_press_event",
G_CALLBACK(&OnEventKeyThunk), this);
signal_registrar_->Connect(widget_, "key_release_event",
G_CALLBACK(&OnEventKeyThunk), this);
// Drag and drop.
gtk_drag_dest_set(window_contents_, static_cast<GtkDestDefaults>(0),
NULL, 0, GDK_ACTION_COPY);
signal_registrar_->Connect(window_contents_, "drag_motion",
G_CALLBACK(&OnDragMotionThunk), this);
signal_registrar_->Connect(window_contents_, "drag_data_received",
G_CALLBACK(&OnDragDataReceivedThunk), this);
signal_registrar_->Connect(window_contents_, "drag_drop",
G_CALLBACK(&OnDragDropThunk), this);
signal_registrar_->Connect(window_contents_, "drag_leave",
G_CALLBACK(&OnDragLeaveThunk), this);
signal_registrar_->Connect(window_contents_, "drag_data_get",
G_CALLBACK(&OnDragDataGetThunk), this);
signal_registrar_->Connect(window_contents_, "drag_end",
G_CALLBACK(&OnDragEndThunk), this);
signal_registrar_->Connect(window_contents_, "drag_failed",
G_CALLBACK(&OnDragFailedThunk), this);
signal_registrar_->Connect(G_OBJECT(widget_), "window-state-event",
G_CALLBACK(&OnWindowStateEventThunk), this);
ui::GObjectDestructorFILO::GetInstance()->Connect(
G_OBJECT(widget_), &OnDestroyedThunk, this);
tooltip_manager_.reset(new TooltipManagerGtk(this));
// Register for tooltips.
g_object_set(G_OBJECT(window_contents_), "has-tooltip", TRUE, NULL);
signal_registrar_->Connect(window_contents_, "query_tooltip",
G_CALLBACK(&OnQueryTooltipThunk), this);
if (child_) {
if (modified_params.parent)
SetBounds(params.bounds);
} else {
gtk_widget_add_events(widget_,
GDK_STRUCTURE_MASK);
if (params.bounds.width() > 0 && params.bounds.height() > 0)
gtk_window_resize(GTK_WINDOW(widget_), params.bounds.width(),
params.bounds.height());
gtk_window_move(GTK_WINDOW(widget_), params.bounds.x(), params.bounds.y());
}
}
NonClientFrameView* NativeWidgetGtk::CreateNonClientFrameView() {
return NULL;
}
void NativeWidgetGtk::UpdateFrameAfterFrameChange() {
// We currently don't support different frame types on Gtk, so we don't
// need to implement this.
NOTIMPLEMENTED();
}
bool NativeWidgetGtk::ShouldUseNativeFrame() const {
return false;
}
void NativeWidgetGtk::FrameTypeChanged() {
// This is called when the Theme has changed, so forward the event to the root
// widget.
GetWidget()->ThemeChanged();
GetWidget()->GetRootView()->SchedulePaint();
}
Widget* NativeWidgetGtk::GetWidget() {
return delegate_->AsWidget();
}
const Widget* NativeWidgetGtk::GetWidget() const {
return delegate_->AsWidget();
}
gfx::NativeView NativeWidgetGtk::GetNativeView() const {
return widget_;
}
gfx::NativeWindow NativeWidgetGtk::GetNativeWindow() const {
return child_ ? NULL : GTK_WINDOW(widget_);
}
Widget* NativeWidgetGtk::GetTopLevelWidget() {
NativeWidgetPrivate* native_widget = GetTopLevelNativeWidget(GetNativeView());
return native_widget ? native_widget->GetWidget() : NULL;
}
const ui::Compositor* NativeWidgetGtk::GetCompositor() const {
return compositor_.get();
}
ui::Compositor* NativeWidgetGtk::GetCompositor() {
return compositor_.get();
}
void NativeWidgetGtk::CalculateOffsetToAncestorWithLayer(
gfx::Point* offset,
ui::Layer** layer_parent) {
}
void NativeWidgetGtk::ReorderLayers() {
}
void NativeWidgetGtk::ViewRemoved(View* view) {
if (drop_target_.get())
drop_target_->ResetTargetViewIfEquals(view);
}
void NativeWidgetGtk::SetNativeWindowProperty(const char* name, void* value) {
g_object_set_data(G_OBJECT(widget_), name, value);
}
void* NativeWidgetGtk::GetNativeWindowProperty(const char* name) const {
return g_object_get_data(G_OBJECT(widget_), name);
}
TooltipManager* NativeWidgetGtk::GetTooltipManager() const {
return tooltip_manager_.get();
}
bool NativeWidgetGtk::IsScreenReaderActive() const {
return false;
}
void NativeWidgetGtk::SendNativeAccessibilityEvent(
View* view,
ui::AccessibilityTypes::Event event_type) {
// In the future if we add native GTK accessibility support, the
// notification should be sent here.
}
void NativeWidgetGtk::SetMouseCapture() {
DCHECK(!HasMouseCapture());
// Release the current grab.
GtkWidget* current_grab_window = gtk_grab_get_current();
if (current_grab_window)
gtk_grab_remove(current_grab_window);
if (is_menu_ && gdk_pointer_is_grabbed())
gdk_pointer_ungrab(GDK_CURRENT_TIME);
// Make sure all app mouse/keyboard events are targeted at us only.
gtk_grab_add(window_contents_);
if (gtk_grab_get_current() == window_contents_ && !grab_notify_signal_id_) {
// "grab_notify" is sent any time the grab changes. We only care about grab
// changes when we have done a grab.
grab_notify_signal_id_ = g_signal_connect(
window_contents_, "grab_notify", G_CALLBACK(&OnGrabNotifyThunk), this);
}
if (is_menu_) {
// For menus we do a pointer grab too. This ensures we get mouse events from
// other apps. In theory we should do this for all widget types, but doing
// so leads to gdk_pointer_grab randomly returning GDK_GRAB_ALREADY_GRABBED.
GdkGrabStatus pointer_grab_status =
gdk_pointer_grab(window_contents()->window, FALSE,
static_cast<GdkEventMask>(
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK),
NULL, NULL, GDK_CURRENT_TIME);
// NOTE: technically grab may fail. We may want to try and continue on in
// that case.
DCHECK_EQ(GDK_GRAB_SUCCESS, pointer_grab_status);
has_pointer_grab_ = pointer_grab_status == GDK_GRAB_SUCCESS;
}
}
void NativeWidgetGtk::ReleaseMouseCapture() {
bool delegate_lost_capture = HasMouseCapture();
if (GTK_WIDGET_HAS_GRAB(window_contents_))
gtk_grab_remove(window_contents_);
if (grab_notify_signal_id_) {
g_signal_handler_disconnect(window_contents_, grab_notify_signal_id_);
grab_notify_signal_id_ = 0;
}
if (has_pointer_grab_) {
has_pointer_grab_ = false;
gdk_pointer_ungrab(GDK_CURRENT_TIME);
}
if (delegate_lost_capture)
delegate_->OnMouseCaptureLost();
}
bool NativeWidgetGtk::HasMouseCapture() const {
return GTK_WIDGET_HAS_GRAB(window_contents_) || has_pointer_grab_;
}
InputMethod* NativeWidgetGtk::CreateInputMethod() {
// Create input method when pure views is enabled but not on views desktop.
// TODO(suzhe): Always enable input method when we start to use
// RenderWidgetHostViewViews in normal ChromeOS.
if (views::Widget::IsPureViews()) {
#if defined(HAVE_IBUS)
InputMethod* input_method =
InputMethodIBus::IsInputMethodIBusEnabled() ?
static_cast<InputMethod*>(new InputMethodIBus(this)) :
static_cast<InputMethod*>(new InputMethodGtk(this));
#else
InputMethod* input_method = new InputMethodGtk(this);
#endif
input_method->Init(GetWidget());
return input_method;
}
// GTK's textfield will handle IME.
return NULL;
}
void NativeWidgetGtk::CenterWindow(const gfx::Size& size) {
gfx::Rect center_rect;
GtkWindow* parent = gtk_window_get_transient_for(GetNativeWindow());
if (parent) {
// We have a parent window, center over it.
gint parent_x = 0;
gint parent_y = 0;
gtk_window_get_position(parent, &parent_x, &parent_y);
gint parent_w = 0;
gint parent_h = 0;
gtk_window_get_size(parent, &parent_w, &parent_h);
center_rect = gfx::Rect(parent_x, parent_y, parent_w, parent_h);
} else {
// We have no parent window, center over the screen.
center_rect = gfx::Screen::GetMonitorWorkAreaNearestWindow(GetNativeView());
}
gfx::Rect bounds(center_rect.x() + (center_rect.width() - size.width()) / 2,
center_rect.y() + (center_rect.height() - size.height()) / 2,
size.width(), size.height());
GetWidget()->SetBoundsConstrained(bounds);
}
void NativeWidgetGtk::GetWindowPlacement(
gfx::Rect* bounds,
ui::WindowShowState* show_state) const {
// Do nothing for now. ChromeOS isn't yet saving window placement.
}
void NativeWidgetGtk::SetWindowTitle(const string16& title) {
// We don't have a window title on ChromeOS (right now).
}
void NativeWidgetGtk::SetWindowIcons(const SkBitmap& window_icon,
const SkBitmap& app_icon) {
// We don't have window icons on ChromeOS.
}
void NativeWidgetGtk::SetAccessibleName(const string16& name) {
}
void NativeWidgetGtk::SetAccessibleRole(ui::AccessibilityTypes::Role role) {
}
void NativeWidgetGtk::SetAccessibleState(ui::AccessibilityTypes::State state) {
}
void NativeWidgetGtk::BecomeModal() {
gtk_window_set_modal(GetNativeWindow(), true);
}
gfx::Rect NativeWidgetGtk::GetWindowScreenBounds() const {
// Client == Window bounds on Gtk.
return GetClientAreaScreenBounds();
}
gfx::Rect NativeWidgetGtk::GetClientAreaScreenBounds() const {
// Due to timing we can get a request for bounds after Close().
// TODO(beng): Figure out if this is bogus.
if (!widget_)
return gfx::Rect(size_);
int x = 0, y = 0, w = 0, h = 0;
if (GTK_IS_WINDOW(widget_)) {
gtk_window_get_position(GTK_WINDOW(widget_), &x, &y);
// NOTE: this doesn't include frame decorations, but it should be good
// enough for our uses.
gtk_window_get_size(GTK_WINDOW(widget_), &w, &h);
} else {
GetWidgetPositionOnScreen(widget_, &x, &y);
w = widget_->allocation.width;
h = widget_->allocation.height;
}
return gfx::Rect(x, y, w, h);
}
gfx::Rect NativeWidgetGtk::GetRestoredBounds() const {
// We currently don't support tiling, so this doesn't matter.
return GetWindowScreenBounds();
}
void NativeWidgetGtk::SetBounds(const gfx::Rect& bounds) {
if (child_) {
GtkWidget* parent = gtk_widget_get_parent(widget_);
if (GTK_IS_VIEWS_FIXED(parent)) {
NativeWidgetGtk* parent_widget = static_cast<NativeWidgetGtk*>(
internal::NativeWidgetPrivate::GetNativeWidgetForNativeView(parent));
parent_widget->PositionChild(widget_, bounds.x(), bounds.y(),
bounds.width(), bounds.height());
} else {
DCHECK(GTK_IS_FIXED(parent))
<< "Parent of NativeWidgetGtk has to be Fixed or ViewsFixed";
// Just request the size if the parent is not NativeWidgetGtk but plain
// GtkFixed. NativeWidgetGtk does not know the minimum size so we assume
// the caller of the SetBounds knows exactly how big it wants to be.
gtk_widget_set_size_request(widget_, bounds.width(), bounds.height());
if (parent != null_parent_)
gtk_fixed_move(GTK_FIXED(parent), widget_, bounds.x(), bounds.y());
}
} else {
if (GTK_WIDGET_MAPPED(widget_)) {
// If the widget is mapped (on screen), we can move and resize with one
// call, which avoids two separate window manager steps.
gdk_window_move_resize(widget_->window, bounds.x(), bounds.y(),
bounds.width(), bounds.height());
}
// Always call gtk_window_move and gtk_window_resize so that GtkWindow's
// geometry info is up-to-date.
GtkWindow* gtk_window = GTK_WINDOW(widget_);
// TODO: this may need to set an initial size if not showing.
// TODO: need to constrain based on screen size.
if (!bounds.IsEmpty()) {
gtk_window_resize(gtk_window, bounds.width(), bounds.height());
}
gtk_window_move(gtk_window, bounds.x(), bounds.y());
}
}
void NativeWidgetGtk::SetSize(const gfx::Size& size) {
if (child_) {
GtkWidget* parent = gtk_widget_get_parent(widget_);
if (GTK_IS_VIEWS_FIXED(parent)) {
gtk_views_fixed_set_widget_size(widget_, size.width(), size.height());
} else {
gtk_widget_set_size_request(widget_, size.width(), size.height());
}
} else {
if (GTK_WIDGET_MAPPED(widget_))
gdk_window_resize(widget_->window, size.width(), size.height());
GtkWindow* gtk_window = GTK_WINDOW(widget_);
if (!size.IsEmpty())
gtk_window_resize(gtk_window, size.width(), size.height());
}
}
void NativeWidgetGtk::StackAbove(gfx::NativeView native_view) {
ui::StackPopupWindow(GetNativeView(), native_view);
}
void NativeWidgetGtk::StackAtTop() {
DCHECK(GTK_IS_WINDOW(GetNativeView()));
gtk_window_present(GTK_WINDOW(GetNativeView()));
}
void NativeWidgetGtk::SetShape(gfx::NativeRegion region) {
if (widget_ && widget_->window) {
gdk_window_shape_combine_region(widget_->window, region, 0, 0);
gdk_region_destroy(region);
}
}
void NativeWidgetGtk::Close() {
if (!widget_)
return; // No need to do anything.
// Hide first.
Hide();
if (!close_widget_factory_.HasWeakPtrs()) {
// And we delay the close just in case we're on the stack.
MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&NativeWidgetGtk::CloseNow,
close_widget_factory_.GetWeakPtr()));
}
}
void NativeWidgetGtk::CloseNow() {
if (widget_) {
gtk_widget_destroy(widget_); // Triggers OnDestroy().
}
}
void NativeWidgetGtk::Show() {
if (widget_) {
gtk_widget_show(widget_);
if (widget_->window)
gdk_window_raise(widget_->window);
}
}
void NativeWidgetGtk::Hide() {
if (widget_) {
gtk_widget_hide(widget_);
if (widget_->window)
gdk_window_lower(widget_->window);
}
}
void NativeWidgetGtk::ShowMaximizedWithBounds(
const gfx::Rect& restored_bounds) {
// TODO: when we add maximization support update this.
Show();
}
void NativeWidgetGtk::ShowWithWindowState(ui::WindowShowState show_state) {
// No concept of maximization (yet) on ChromeOS.
if (show_state == ui::SHOW_STATE_INACTIVE)
gtk_window_set_focus_on_map(GetNativeWindow(), false);
gtk_widget_show(GetNativeView());
}
bool NativeWidgetGtk::IsVisible() const {
return GTK_WIDGET_VISIBLE(GetNativeView()) && (GetWidget()->is_top_level() ||
GetWidget()->GetTopLevelWidget()->IsVisible());
}
void NativeWidgetGtk::Activate() {
gtk_window_present(GetNativeWindow());
}
void NativeWidgetGtk::Deactivate() {
gdk_window_lower(GTK_WIDGET(GetNativeView())->window);
}
bool NativeWidgetGtk::IsActive() const {
DCHECK(!child_);
return is_active_;
}
void NativeWidgetGtk::SetAlwaysOnTop(bool on_top) {
DCHECK(!child_);
always_on_top_ = on_top;
if (widget_)
gtk_window_set_keep_above(GTK_WINDOW(widget_), on_top);
}
void NativeWidgetGtk::Maximize() {
gtk_window_maximize(GetNativeWindow());
}
void NativeWidgetGtk::Minimize() {
gtk_window_iconify(GetNativeWindow());
}
bool NativeWidgetGtk::IsMaximized() const {
return window_state_ & GDK_WINDOW_STATE_MAXIMIZED;
}
bool NativeWidgetGtk::IsMinimized() const {
return window_state_ & GDK_WINDOW_STATE_ICONIFIED;
}
void NativeWidgetGtk::Restore() {
if (IsFullscreen()) {
SetFullscreen(false);
} else {
if (IsMaximized())
gtk_window_unmaximize(GetNativeWindow());
else if (IsMinimized())
gtk_window_deiconify(GetNativeWindow());
}
}
void NativeWidgetGtk::SetFullscreen(bool fullscreen) {
if (fullscreen)
gtk_window_fullscreen(GetNativeWindow());
else
gtk_window_unfullscreen(GetNativeWindow());
}
bool NativeWidgetGtk::IsFullscreen() const {
return window_state_ & GDK_WINDOW_STATE_FULLSCREEN;
}
void NativeWidgetGtk::SetOpacity(unsigned char opacity) {
opacity_ = opacity;
if (widget_) {
// We can only set the opacity when the widget has been realized.
gdk_window_set_opacity(widget_->window, static_cast<gdouble>(opacity) /
static_cast<gdouble>(255));
}
}
void NativeWidgetGtk::SetUseDragFrame(bool use_drag_frame) {
NOTIMPLEMENTED();
}
bool NativeWidgetGtk::IsAccessibleWidget() const {
return false;
}
void NativeWidgetGtk::RunShellDrag(View* view,
const ui::OSExchangeData& data,
int operation) {
DoDrag(data, operation);
}
void NativeWidgetGtk::SchedulePaintInRect(const gfx::Rect& rect) {
// No need to schedule paint if
// 1) widget_ is NULL. This may happen because this instance may
// be deleted after the gtk widget has been destroyed (See OnDestroy()).
// 2) widget_ is not drawable (mapped and visible)
// 3) If it's never painted before. The first expose event will
// paint the area that has to be painted.
if (widget_ && GTK_WIDGET_DRAWABLE(widget_) && painted_) {
gtk_widget_queue_draw_area(widget_, rect.x(), rect.y(), rect.width(),
rect.height());
}
}
void NativeWidgetGtk::SetCursor(gfx::NativeCursor cursor) {
// |window_contents_| is placed on top of |widget_|. So the cursor needs to be
// set on |window_contents_| instead of |widget_|.
if (window_contents_)
gdk_window_set_cursor(window_contents_->window, cursor);
}
void NativeWidgetGtk::ClearNativeFocus() {
DCHECK(!child_);
if (!GetNativeView()) {
NOTREACHED();
return;
}
gtk_window_set_focus(GTK_WINDOW(GetNativeView()), NULL);
}
void NativeWidgetGtk::FocusNativeView(gfx::NativeView native_view) {
if (native_view && !gtk_widget_is_focus(native_view))
gtk_widget_grab_focus(native_view);
}
gfx::Rect NativeWidgetGtk::GetWorkAreaBoundsInScreen() const {
return gfx::Screen::GetMonitorWorkAreaNearestWindow(GetNativeView());
}
void NativeWidgetGtk::SetInactiveRenderingDisabled(bool value) {
}
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetGtk, protected:
void NativeWidgetGtk::OnSizeRequest(GtkWidget* widget,
GtkRequisition* requisition) {
// Do only return the preferred size for child windows. GtkWindow interprets
// the requisition as a minimum size for top level windows, returning a
// preferred size for these would prevents us from setting smaller window
// sizes.
if (child_) {
gfx::Size size(GetWidget()->GetRootView()->GetPreferredSize());
requisition->width = size.width();
requisition->height = size.height();
}
}
void NativeWidgetGtk::OnSizeAllocate(GtkWidget* widget,
GtkAllocation* allocation) {
// See comment next to size_ as to why we do this. Also note, it's tempting
// to put this in the static method so subclasses don't need to worry about
// it, but if a subclasses needs to set a shape then they need to always
// reset the shape in this method regardless of whether the size changed.
gfx::Size new_size(allocation->width, allocation->height);
if (new_size == size_)
return;
size_ = new_size;
if (compositor_.get())
compositor_->WidgetSizeChanged(size_);
delegate_->OnNativeWidgetSizeChanged(size_);
if (GetWidget()->non_client_view()) {
// The Window's NonClientView may provide a custom shape for the Window.
gfx::Path window_mask;
GetWidget()->non_client_view()->GetWindowMask(gfx::Size(allocation->width,
allocation->height),
&window_mask);
GdkRegion* mask_region = window_mask.CreateNativeRegion();
gdk_window_shape_combine_region(GetNativeView()->window, mask_region, 0, 0);
if (mask_region)
gdk_region_destroy(mask_region);
SaveWindowPosition();
}
}
gboolean NativeWidgetGtk::OnPaint(GtkWidget* widget, GdkEventExpose* event) {
gdk_window_set_debug_updates(Widget::IsDebugPaintEnabled());
if (transparent_ && child_) {
// Clear the background before drawing any view and native components.
DrawTransparentBackground(widget, event);
if (!CompositePainter::IsComposited(widget_) &&
gdk_screen_is_composited(gdk_screen_get_default())) {
// Let the parent draw the content only after something is drawn on
// the widget.
CompositePainter::SetComposited(widget_);
}
}
ui::ScopedRegion region(gdk_region_copy(event->region));
if (!gdk_region_empty(region.Get())) {
GdkRectangle clip_bounds;
gdk_region_get_clipbox(region.Get(), &clip_bounds);
if (!delegate_->OnNativeWidgetPaintAccelerated(gfx::Rect(clip_bounds))) {
gfx::CanvasSkiaPaint canvas(event);
if (!canvas.is_empty()) {
canvas.set_composite_alpha(is_transparent());
delegate_->OnNativeWidgetPaint(&canvas);
}
}
}
if (!painted_) {
painted_ = true;
if (!child_)
UpdateFreezeUpdatesProperty(GTK_WINDOW(widget_), false /* remove */);
}
return false; // False indicates other widgets should get the event as well.
}
void NativeWidgetGtk::OnDragDataGet(GtkWidget* widget,
GdkDragContext* context,
GtkSelectionData* data,
guint info,
guint time) {
if (!drag_data_) {
NOTREACHED();
return;
}
drag_data_->WriteFormatToSelection(info, data);
}
void NativeWidgetGtk::OnDragDataReceived(GtkWidget* widget,
GdkDragContext* context,
gint x,
gint y,
GtkSelectionData* data,
guint info,
guint time) {
if (drop_target_.get())
drop_target_->OnDragDataReceived(context, x, y, data, info, time);
}
gboolean NativeWidgetGtk::OnDragDrop(GtkWidget* widget,
GdkDragContext* context,
gint x,
gint y,
guint time) {
if (drop_target_.get()) {
return drop_target_->OnDragDrop(context, x, y, time);
}
return FALSE;
}
void NativeWidgetGtk::OnDragEnd(GtkWidget* widget, GdkDragContext* context) {
if (!drag_data_) {
// This indicates we didn't start a drag operation, and should never
// happen.
NOTREACHED();
return;
}
// Quit the nested message loop we spawned in DoDrag.
MessageLoop::current()->Quit();
}
gboolean NativeWidgetGtk::OnDragFailed(GtkWidget* widget,
GdkDragContext* context,
GtkDragResult result) {
return FALSE;
}
void NativeWidgetGtk::OnDragLeave(GtkWidget* widget,
GdkDragContext* context,
guint time) {
if (ignore_drag_leave_) {
ignore_drag_leave_ = false;
return;
}
if (drop_target_.get()) {
drop_target_->OnDragLeave(context, time);
drop_target_.reset(NULL);
}
}
gboolean NativeWidgetGtk::OnDragMotion(GtkWidget* widget,
GdkDragContext* context,
gint x,
gint y,
guint time) {
if (!drop_target_.get()) {
drop_target_.reset(new DropTargetGtk(
reinterpret_cast<internal::RootView*>(GetWidget()->GetRootView()),
context));
}
return drop_target_->OnDragMotion(context, x, y, time);
}
gboolean NativeWidgetGtk::OnEnterNotify(GtkWidget* widget,
GdkEventCrossing* event) {
if (HasMouseCapture() && event->mode == GDK_CROSSING_GRAB) {
// Doing a grab results an async enter event, regardless of where the mouse
// is. We don't want to generate a mouse move in this case.
return false;
}
if (!GetWidget()->last_mouse_event_was_move_ &&
!GetWidget()->is_mouse_button_pressed_) {
// When a mouse button is pressed gtk generates a leave, enter, press.
// RootView expects to get a mouse move before a press, otherwise enter is
// not set. So we generate a move here.
GdkEventMotion motion = { GDK_MOTION_NOTIFY, event->window,
event->send_event, event->time, event->x, event->y, NULL, event->state,
0, NULL, event->x_root, event->y_root };
// If this event is the result of pressing a button then one of the button
// modifiers is set. Unset it as we're compensating for the leave generated
// when you press a button.
motion.state &= ~(GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK);
MouseEvent mouse_event(TransformEvent(&motion));
delegate_->OnMouseEvent(mouse_event);
}
return false;
}
gboolean NativeWidgetGtk::OnLeaveNotify(GtkWidget* widget,
GdkEventCrossing* event) {
gdk_window_set_cursor(widget->window, gfx::GetCursor(GDK_LEFT_PTR));
GetWidget()->ResetLastMouseMoveFlag();
if (!HasMouseCapture() && !GetWidget()->is_mouse_button_pressed_) {
// Don't convert if the event is synthetic and has 0x0 coordinates.
if (event->x_root || event->y_root || event->x || event->y ||
!event->send_event) {
TransformEvent(event);
}
MouseEvent mouse_event(reinterpret_cast<GdkEvent*>(event));
delegate_->OnMouseEvent(mouse_event);
}
return false;
}
gboolean NativeWidgetGtk::OnMotionNotify(GtkWidget* widget,
GdkEventMotion* event) {
if (GetWidget()->non_client_view()) {
GdkEventMotion transformed_event = *event;
TransformEvent(&transformed_event);
gfx::Point translated_location(transformed_event.x, transformed_event.y);
// Update the cursor for the screen edge.
int hittest_code =
GetWidget()->non_client_view()->NonClientHitTest(translated_location);
if (hittest_code != HTCLIENT) {
GdkCursorType cursor_type = HitTestCodeToGdkCursorType(hittest_code);
gdk_window_set_cursor(widget->window, gfx::GetCursor(cursor_type));
}
}
MouseEvent mouse_event(TransformEvent(event));
delegate_->OnMouseEvent(mouse_event);
return true;
}
gboolean NativeWidgetGtk::OnButtonPress(GtkWidget* widget,
GdkEventButton* event) {
if (GetWidget()->non_client_view()) {
GdkEventButton transformed_event = *event;
MouseEvent mouse_event(TransformEvent(&transformed_event));
int hittest_code = GetWidget()->non_client_view()->NonClientHitTest(
mouse_event.location());
switch (hittest_code) {
case HTCAPTION: {
// Start dragging if the mouse event is a single click and *not* a right
// click. If it is a right click, then pass it through to
// NativeWidgetGtk::OnButtonPress so that View class can show
// ContextMenu upon a mouse release event. We only start drag on single
// clicks as we get a crash in Gtk on double/triple clicks.
if (event->type == GDK_BUTTON_PRESS &&
!mouse_event.IsOnlyRightMouseButton()) {
gfx::Point screen_point(event->x, event->y);
View::ConvertPointToScreen(GetWidget()->GetRootView(), &screen_point);
gtk_window_begin_move_drag(GetNativeWindow(), event->button,
screen_point.x(), screen_point.y(),
event->time);
return TRUE;
}
break;
}
case HTBOTTOM:
case HTBOTTOMLEFT:
case HTBOTTOMRIGHT:
case HTGROWBOX:
case HTLEFT:
case HTRIGHT:
case HTTOP:
case HTTOPLEFT:
case HTTOPRIGHT: {
gfx::Point screen_point(event->x, event->y);
View::ConvertPointToScreen(GetWidget()->GetRootView(), &screen_point);
// TODO(beng): figure out how to get a good minimum size.
gtk_widget_set_size_request(GetNativeView(), 100, 100);
gtk_window_begin_resize_drag(GetNativeWindow(),
HitTestCodeToGDKWindowEdge(hittest_code),
event->button, screen_point.x(),
screen_point.y(), event->time);
return TRUE;
}
default:
// Everything else falls into standard client event handling...
break;
}
}
if (event->type == GDK_2BUTTON_PRESS || event->type == GDK_3BUTTON_PRESS) {
// The sequence for double clicks is press, release, press, 2press, release.
// This means that at the time we get the second 'press' we don't know
// whether it corresponds to a double click or not. For now we're completely
// ignoring the 2press/3press events as they are duplicate. To make this
// work right we need to write our own code that detects if the press is a
// double/triple. For now we're completely punting, which means we always
// get single clicks.
// TODO: fix this.
return true;
}
MouseEvent mouse_event(TransformEvent(event));
// Returns true to consume the event when widget is not transparent.
return delegate_->OnMouseEvent(mouse_event) || !transparent_;
}
gboolean NativeWidgetGtk::OnButtonRelease(GtkWidget* widget,
GdkEventButton* event) {
// GTK generates a mouse release at the end of dnd. We need to ignore it.
if (!drag_data_) {
MouseEvent mouse_event(TransformEvent(event));
delegate_->OnMouseEvent(mouse_event);
}
return true;
}
gboolean NativeWidgetGtk::OnScroll(GtkWidget* widget, GdkEventScroll* event) {
MouseWheelEvent mouse_event(TransformEvent(event));
return delegate_->OnMouseEvent(mouse_event);
}
gboolean NativeWidgetGtk::OnFocusIn(GtkWidget* widget, GdkEventFocus* event) {
if (has_focus_)
return false; // This is the second focus-in event in a row, ignore it.
has_focus_ = true;
should_handle_menu_key_release_ = false;
if (!GetWidget()->is_top_level())
return false;
// Only top-level Widget should have an InputMethod instance.
InputMethod* input_method = GetWidget()->GetInputMethod();
if (input_method)
input_method->OnFocus();
// See description of got_initial_focus_in_ for details on this.
if (!got_initial_focus_in_) {
got_initial_focus_in_ = true;
// Sets initial focus here. On X11/Gtk, window creation
// is asynchronous and a focus request has to be made after a window
// gets created.
GetWidget()->SetInitialFocus();
}
return false;
}
gboolean NativeWidgetGtk::OnFocusOut(GtkWidget* widget, GdkEventFocus* event) {
if (!has_focus_)
return false; // This is the second focus-out event in a row, ignore it.
has_focus_ = false;
if (!GetWidget()->is_top_level())
return false;
// Only top-level Widget should have an InputMethod instance.
InputMethod* input_method = GetWidget()->GetInputMethod();
if (input_method)
input_method->OnBlur();
return false;
}
gboolean NativeWidgetGtk::OnEventKey(GtkWidget* widget, GdkEventKey* event) {
KeyEvent key(reinterpret_cast<GdkEvent*>(event));
InputMethod* input_method = GetWidget()->GetInputMethod();
if (input_method)
input_method->DispatchKeyEvent(key);
else
DispatchKeyEventPostIME(key);
// Returns true to prevent GtkWindow's default key event handler.
return true;
}
gboolean NativeWidgetGtk::OnQueryTooltip(GtkWidget* widget,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip* tooltip) {
return static_cast<TooltipManagerGtk*>(tooltip_manager_.get())->
ShowTooltip(x, y, keyboard_mode, tooltip);
}
gboolean NativeWidgetGtk::OnVisibilityNotify(GtkWidget* widget,
GdkEventVisibility* event) {
return false;
}
gboolean NativeWidgetGtk::OnGrabBrokeEvent(GtkWidget* widget, GdkEvent* event) {
if (!has_pointer_grab_ && !has_keyboard_grab_) {
// We don't have any grabs; don't attempt to do anything.
return false;
}
// Sent when either the keyboard or pointer grab is broke. We drop both grabs
// in this case.
if (event->grab_broken.keyboard) {
// Keyboard grab was broke.
has_keyboard_grab_ = false;
if (has_pointer_grab_) {
has_pointer_grab_ = false;
gdk_pointer_ungrab(GDK_CURRENT_TIME);
delegate_->OnMouseCaptureLost();
}
} else {
// Mouse grab was broke.
has_pointer_grab_ = false;
if (has_keyboard_grab_) {
has_keyboard_grab_ = false;
gdk_keyboard_ungrab(GDK_CURRENT_TIME);
}
delegate_->OnMouseCaptureLost();
}
ReleaseMouseCapture();
return false; // To let other widgets get the event.
}
void NativeWidgetGtk::OnGrabNotify(GtkWidget* widget, gboolean was_grabbed) {
// Sent when gtk_grab_add changes.
if (!window_contents_)
return; // Grab broke after window destroyed, don't try processing it.
if (!was_grabbed) // Indicates we've been shadowed (lost grab).
HandleGtkGrabBroke();
}
void NativeWidgetGtk::OnDestroy(GtkWidget* object) {
signal_registrar_.reset();
if (grab_notify_signal_id_) {
g_signal_handler_disconnect(window_contents_, grab_notify_signal_id_);
grab_notify_signal_id_ = 0;
}
delegate_->OnNativeWidgetDestroying();
if (!child_)
ActiveWindowWatcherX::RemoveObserver(this);
// Note that this handler is hooked to GtkObject::destroy.
// NULL out pointers here since we might still be in an observer list
// until deletion happens.
widget_ = window_contents_ = NULL;
}
void NativeWidgetGtk::OnDestroyed(GObject *where_the_object_was) {
delegate_->OnNativeWidgetDestroyed();
if (ownership_ == Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET)
delete this;
}
void NativeWidgetGtk::OnShow(GtkWidget* widget) {
delegate_->OnNativeWidgetVisibilityChanged(true);
}
void NativeWidgetGtk::OnMap(GtkWidget* widget) {
}
void NativeWidgetGtk::OnHide(GtkWidget* widget) {
delegate_->OnNativeWidgetVisibilityChanged(false);
}
gboolean NativeWidgetGtk::OnWindowStateEvent(GtkWidget* widget,
GdkEventWindowState* event) {
if (GetWidget()->non_client_view() &&
!(event->new_window_state & GDK_WINDOW_STATE_WITHDRAWN)) {
SaveWindowPosition();
}
window_state_ = event->new_window_state;
return FALSE;
}
gboolean NativeWidgetGtk::OnConfigureEvent(GtkWidget* widget,
GdkEventConfigure* event) {
SaveWindowPosition();
return FALSE;
}
void NativeWidgetGtk::HandleGtkGrabBroke() {
ReleaseMouseCapture();
delegate_->OnMouseCaptureLost();
}
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetGtk, private:
void NativeWidgetGtk::ScheduleDraw() {
SchedulePaintInRect(gfx::Rect(gfx::Point(), size_));
}
void NativeWidgetGtk::DispatchKeyEventPostIME(const KeyEvent& key) {
// Always reset |should_handle_menu_key_release_| unless we are handling a
// VKEY_MENU key release event. It ensures that VKEY_MENU accelerator can only
// be activated when handling a VKEY_MENU key release event which is preceded
// by an unhandled VKEY_MENU key press event. See also HandleKeyboardEvent().
if (key.key_code() != ui::VKEY_MENU || key.type() != ui::ET_KEY_RELEASED)
should_handle_menu_key_release_ = false;
// Send the key event to View hierarchy first.
bool handled = delegate_->OnKeyEvent(key);
if (key.key_code() == ui::VKEY_PROCESSKEY || handled)
return;
// Dispatch the key event to native GtkWidget hierarchy.
// To prevent GtkWindow from handling the key event as a keybinding, we need
// to bypass GtkWindow's default key event handler and dispatch the event
// here.
GdkEventKey* event = reinterpret_cast<GdkEventKey*>(key.gdk_event());
if (!handled && event && GTK_IS_WINDOW(widget_))
handled = gtk_window_propagate_key_event(GTK_WINDOW(widget_), event);
// On Linux, in order to handle VKEY_MENU (Alt) accelerator key correctly and
// avoid issues like: http://crbug.com/40966 and http://crbug.com/49701, we
// should only send the key event to the focus manager if it's not handled by
// any View or native GtkWidget.
// The flow is different when the focus is in a RenderWidgetHostViewGtk, which
// always consumes the key event and send it back to us later by calling
// HandleKeyboardEvent() directly, if it's not handled by webkit.
if (!handled)
handled = HandleKeyboardEvent(key);
// Dispatch the key event for bindings processing.
if (!handled && event && GTK_IS_WINDOW(widget_))
gtk_bindings_activate_event(GTK_OBJECT(widget_), event);
}
void NativeWidgetGtk::SetInitParams(const Widget::InitParams& params) {
DCHECK(!GetNativeView());
ownership_ = params.ownership;
child_ = params.child;
is_menu_ = params.type == Widget::InitParams::TYPE_MENU;
// TODO(beng): The secondary checks here actually obviate the need for
// params.transient but that's only because NativeWidgetGtk
// considers any top-level widget to be a transient widget. We
// will probably want to ammend this assumption at some point.
if (params.transient || params.parent || params.parent_widget)
transient_to_parent_ = true;
if (params.transparent)
MakeTransparent();
if (!params.accept_events && !child_)
ignore_events_ = true;
if (params.double_buffer)
EnableDoubleBuffer(true);
}
gboolean NativeWidgetGtk::OnWindowPaint(GtkWidget* widget,
GdkEventExpose* event) {
// Clear the background to be totally transparent. We don't need to
// paint the root view here as that is done by OnPaint.
DCHECK(transparent_);
DrawTransparentBackground(widget, event);
// The Keyboard layout view has a renderer that covers the entire
// window, which prevents OnPaint from being called on window_contents_,
// so we need to remove the FREEZE_UPDATES property here.
if (!painted_) {
painted_ = true;
UpdateFreezeUpdatesProperty(GTK_WINDOW(widget_), false /* remove */);
}
return false;
}
void NativeWidgetGtk::OnChildExpose(GtkWidget* child) {
DCHECK(!child_);
if (!painted_) {
painted_ = true;
UpdateFreezeUpdatesProperty(GTK_WINDOW(widget_), false /* remove */);
}
UnregisterChildExposeHandler(child);
}
// static
gboolean NativeWidgetGtk::ChildExposeHandler(GtkWidget* widget,
GdkEventExpose* event) {
GtkWidget* toplevel = gtk_widget_get_ancestor(widget, GTK_TYPE_WINDOW);
CHECK(toplevel);
Widget* views_widget = Widget::GetWidgetForNativeView(toplevel);
CHECK(views_widget);
NativeWidgetGtk* widget_gtk =
static_cast<NativeWidgetGtk*>(views_widget->native_widget());
widget_gtk->OnChildExpose(widget);
return false;
}
void NativeWidgetGtk::CreateGtkWidget(const Widget::InitParams& params) {
// We turn off double buffering for two reasons:
// 1. We draw to a canvas then composite to the screen, which means we're
// doing our own double buffering already.
// 2. GTKs double buffering clips to the dirty region. RootView occasionally
// needs to expand the paint region (see RootView::OnPaint). This means
// that if we use GTK's double buffering and we tried to expand the dirty
// region, it wouldn't get painted.
if (child_) {
window_contents_ = widget_ = gtk_views_fixed_new();
gtk_widget_set_name(widget_, "views-gtkwidget-child-fixed");
if (!is_double_buffered_)
GTK_WIDGET_UNSET_FLAGS(widget_, GTK_DOUBLE_BUFFERED);
gtk_fixed_set_has_window(GTK_FIXED(widget_), true);
if (!params.parent && !null_parent_) {
GtkWidget* popup = gtk_window_new(GTK_WINDOW_POPUP);
null_parent_ = gtk_fixed_new();
gtk_widget_set_name(null_parent_, "views-gtkwidget-null-parent");
gtk_container_add(GTK_CONTAINER(popup), null_parent_);
gtk_widget_realize(null_parent_);
}
if (transparent_) {
// transparency has to be configured before widget is realized.
DCHECK(params.parent) <<
"Transparent widget must have parent when initialized";
ConfigureWidgetForTransparentBackground(params.parent);
}
gtk_container_add(
GTK_CONTAINER(params.parent ? params.parent : null_parent_), widget_);
gtk_widget_realize(widget_);
if (transparent_) {
// The widget has to be realized to set composited flag.
// I tried "realize" signal to set this flag, but it did not work
// when the top level is popup.
DCHECK(GTK_WIDGET_REALIZED(widget_));
gdk_window_set_composited(widget_->window, true);
}
if (params.parent && !params.bounds.size().IsEmpty()) {
// Make sure that an widget is given it's initial size before
// we're done initializing, to take care of some potential
// corner cases when programmatically arranging hierarchies as
// seen in
// http://code.google.com/p/chromium-os/issues/detail?id=5987
// This can't be done without a parent present, or stale data
// might show up on the screen as seen in
// http://code.google.com/p/chromium/issues/detail?id=53870
GtkAllocation alloc =
{ 0, 0, params.bounds.width(), params.bounds.height() };
gtk_widget_size_allocate(widget_, &alloc);
}
if (params.type == Widget::InitParams::TYPE_CONTROL) {
// Controls are initially visible.
gtk_widget_show(widget_);
}
} else {
Widget::InitParams::Type type = params.type;
if (type == Widget::InitParams::TYPE_BUBBLE &&
params.delegate->AsBubbleDelegate() &&
params.delegate->AsBubbleDelegate()->use_focusless()) {
// Handles focusless bubble type, which are bubbles that should
// act like popups rather than gtk windows. They do not get focus
// and are not controlled by window manager placement.
type = Widget::InitParams::TYPE_POPUP;
}
// Use our own window class to override GtkWindow's move_focus method.
widget_ = gtk_views_window_new(WindowTypeToGtkWindowType(type));
gtk_widget_set_name(widget_, "views-gtkwidget-window");
if (transient_to_parent_) {
gtk_window_set_transient_for(GTK_WINDOW(widget_),
GTK_WINDOW(params.parent));
}
GTK_WIDGET_UNSET_FLAGS(widget_, GTK_DOUBLE_BUFFERED);
// Gtk determines the size for windows based on the requested size of the
// child. For NativeWidgetGtk the child is a fixed. If the fixed ends up
// with a child widget it's possible the child widget will drive the
// requested size of the widget, which we don't want. We explicitly set a
// value of 1x1 here so that gtk doesn't attempt to resize the window if we
// end up with a situation where the requested size of a child of the fixed
// is greater than the size of the window. By setting the size in this
// manner we're also allowing users of WidgetGtk to change the requested
// size at any time.
gtk_widget_set_size_request(widget_, 1, 1);
if (!params.bounds.size().IsEmpty()) {
// When we realize the window, the window manager is given a size. If we
// don't specify a size before then GTK defaults to 200x200. Specify
// a size now so that the window manager sees the requested size.
GtkAllocation alloc =
{ 0, 0, params.bounds.width(), params.bounds.height() };
gtk_widget_size_allocate(widget_, &alloc);
}
gtk_window_set_decorated(GTK_WINDOW(widget_), false);
// We'll take care of positioning our window.
gtk_window_set_position(GTK_WINDOW(widget_), GTK_WIN_POS_NONE);
window_contents_ = gtk_views_fixed_new();
gtk_widget_set_name(window_contents_, "views-gtkwidget-window-fixed");
if (!is_double_buffered_)
GTK_WIDGET_UNSET_FLAGS(window_contents_, GTK_DOUBLE_BUFFERED);
gtk_fixed_set_has_window(GTK_FIXED(window_contents_), true);
gtk_container_add(GTK_CONTAINER(widget_), window_contents_);
gtk_widget_show(window_contents_);
g_object_set_data(G_OBJECT(window_contents_), kNativeWidgetKey,
static_cast<NativeWidgetGtk*>(this));
if (transparent_)
ConfigureWidgetForTransparentBackground(NULL);
if (ignore_events_)
ConfigureWidgetForIgnoreEvents();
// Realize the window_contents_ so that we can always get a handle for
// acceleration. Without this we need to check every time paint is
// invoked.
gtk_widget_realize(window_contents_);
SetAlwaysOnTop(always_on_top_);
// UpdateFreezeUpdatesProperty will realize the widget and handlers like
// size-allocate will function properly.
UpdateFreezeUpdatesProperty(GTK_WINDOW(widget_), true /* add */);
}
SetNativeWindowProperty(kNativeWidgetKey, this);
}
void NativeWidgetGtk::ConfigureWidgetForTransparentBackground(
GtkWidget* parent) {
DCHECK(widget_ && window_contents_);
GdkColormap* rgba_colormap =
gdk_screen_get_rgba_colormap(gtk_widget_get_screen(widget_));
if (!rgba_colormap) {
transparent_ = false;
return;
}
// To make the background transparent we need to install the RGBA colormap
// on both the window and fixed. In addition we need to make sure no
// decorations are drawn. The last bit is to make sure the widget doesn't
// attempt to draw a pixmap in it's background.
if (!child_) {
DCHECK(parent == NULL);
gtk_widget_set_colormap(widget_, rgba_colormap);
gtk_widget_set_app_paintable(widget_, true);
signal_registrar_->Connect(widget_, "expose_event",
G_CALLBACK(&OnWindowPaintThunk), this);
gtk_widget_realize(widget_);
gdk_window_set_decorations(widget_->window,
static_cast<GdkWMDecoration>(0));
} else {
DCHECK(parent);
CompositePainter::AddCompositePainter(parent);
}
DCHECK(!GTK_WIDGET_REALIZED(window_contents_));
gtk_widget_set_colormap(window_contents_, rgba_colormap);
}
void NativeWidgetGtk::ConfigureWidgetForIgnoreEvents() {
gtk_widget_realize(widget_);
GdkWindow* gdk_window = widget_->window;
Display* display = GDK_WINDOW_XDISPLAY(gdk_window);
XID win = GDK_WINDOW_XID(gdk_window);
// This sets the clickable area to be empty, allowing all events to be
// passed to any windows behind this one.
XShapeCombineRectangles(
display,
win,
ShapeInput,
0, // x offset
0, // y offset
NULL, // rectangles
0, // num rectangles
ShapeSet,
0);
}
void NativeWidgetGtk::DrawTransparentBackground(GtkWidget* widget,
GdkEventExpose* event) {
cairo_t* cr = gdk_cairo_create(widget->window);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
gdk_cairo_region(cr, event->region);
cairo_fill(cr);
cairo_destroy(cr);
}
void NativeWidgetGtk::SaveWindowPosition() {
// The delegate may have gone away on us.
if (!GetWidget()->widget_delegate())
return;
ui::WindowShowState show_state = ui::SHOW_STATE_NORMAL;
if (IsMaximized())
show_state = ui::SHOW_STATE_MAXIMIZED;
else if (IsMinimized())
show_state = ui::SHOW_STATE_MINIMIZED;
GetWidget()->widget_delegate()->SaveWindowPlacement(
GetWidget()->GetWindowScreenBounds(),
show_state);
}
////////////////////////////////////////////////////////////////////////////////
// Widget, public:
// static
void Widget::NotifyLocaleChanged() {
GList *window_list = gtk_window_list_toplevels();
for (GList* element = window_list; element; element = g_list_next(element)) {
Widget* widget =
Widget::GetWidgetForNativeWindow(GTK_WINDOW(element->data));
if (widget)
widget->LocaleChanged();
}
g_list_free(window_list);
}
// static
void Widget::CloseAllSecondaryWidgets() {
GList* windows = gtk_window_list_toplevels();
for (GList* window = windows; window;
window = g_list_next(window)) {
Widget* widget = Widget::GetWidgetForNativeView(GTK_WIDGET(window->data));
if (widget && widget->is_secondary_widget())
widget->Close();
}
g_list_free(windows);
}
// static
bool Widget::ConvertRect(const Widget* source,
const Widget* target,
gfx::Rect* rect) {
DCHECK(source);
DCHECK(target);
DCHECK(rect);
// TODO(oshima): Add check if source and target belongs to the same
// screen.
if (source == target)
return true;
if (!source || !target)
return false;
gfx::Point source_point = source->GetWindowScreenBounds().origin();
gfx::Point target_point = target->GetWindowScreenBounds().origin();
rect->set_origin(
source_point.Subtract(target_point).Add(rect->origin()));
return true;
}
namespace internal {
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetPrivate, public:
// static
NativeWidgetPrivate* NativeWidgetPrivate::CreateNativeWidget(
NativeWidgetDelegate* delegate) {
return new NativeWidgetGtk(delegate);
}
// static
NativeWidgetPrivate* NativeWidgetPrivate::GetNativeWidgetForNativeView(
gfx::NativeView native_view) {
if (!native_view)
return NULL;
return reinterpret_cast<NativeWidgetGtk*>(
g_object_get_data(G_OBJECT(native_view), kNativeWidgetKey));
}
// static
NativeWidgetPrivate* NativeWidgetPrivate::GetNativeWidgetForNativeWindow(
gfx::NativeWindow native_window) {
if (!native_window)
return NULL;
return reinterpret_cast<NativeWidgetGtk*>(
g_object_get_data(G_OBJECT(native_window), kNativeWidgetKey));
}
// static
NativeWidgetPrivate* NativeWidgetPrivate::GetTopLevelNativeWidget(
gfx::NativeView native_view) {
if (!native_view)
return NULL;
NativeWidgetPrivate* widget = NULL;
GtkWidget* parent_gtkwidget = native_view;
NativeWidgetPrivate* parent_widget;
do {
parent_widget = GetNativeWidgetForNativeView(parent_gtkwidget);
if (parent_widget)
widget = parent_widget;
parent_gtkwidget = gtk_widget_get_parent(parent_gtkwidget);
} while (parent_gtkwidget);
return widget && widget->GetWidget()->is_top_level() ? widget : NULL;
}
// static
void NativeWidgetPrivate::GetAllChildWidgets(gfx::NativeView native_view,
Widget::Widgets* children) {
if (!native_view)
return;
Widget* widget = Widget::GetWidgetForNativeView(native_view);
if (widget)
children->insert(widget);
gtk_container_foreach(GTK_CONTAINER(native_view),
EnumerateChildWidgetsForNativeWidgets,
reinterpret_cast<gpointer>(children));
}
// static
void NativeWidgetPrivate::ReparentNativeView(gfx::NativeView native_view,
gfx::NativeView new_parent) {
if (!native_view)
return;
gfx::NativeView previous_parent = gtk_widget_get_parent(native_view);
if (previous_parent == new_parent)
return;
Widget::Widgets widgets;
GetAllChildWidgets(native_view, &widgets);
// First notify all the widgets that they are being disassociated
// from their previous parent.
for (Widget::Widgets::iterator it = widgets.begin();
it != widgets.end(); ++it) {
// TODO(beng): Rename this notification to NotifyNativeViewChanging()
// and eliminate the bool parameter.
(*it)->NotifyNativeViewHierarchyChanged(false, previous_parent);
}
if (gtk_widget_get_parent(native_view))
gtk_widget_reparent(native_view, new_parent);
else
gtk_container_add(GTK_CONTAINER(new_parent), native_view);
// And now, notify them that they have a brand new parent.
for (Widget::Widgets::iterator it = widgets.begin();
it != widgets.end(); ++it) {
(*it)->NotifyNativeViewHierarchyChanged(true, new_parent);
}
}
// static
bool NativeWidgetPrivate::IsMouseButtonDown() {
bool button_pressed = false;
GdkEvent* event = gtk_get_current_event();
if (event) {
button_pressed = event->type == GDK_BUTTON_PRESS ||
event->type == GDK_2BUTTON_PRESS ||
event->type == GDK_3BUTTON_PRESS;
gdk_event_free(event);
}
return button_pressed;
}
} // namespace internal
} // namespace views