gtk/ui.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020 Ian McInerney <Ian.S.McInerney at ieee.org>
 * Copyright (C) 2020-2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <kiplatform/ui.h>
 
#include <wx/choice.h>
#include <wx/nonownedwnd.h>
#include <wx/settings.h>
#include <wx/window.h>
#include <wx/log.h>
 
#include <gtk/gtk.h>
#include <gdk/gdk.h>
 
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif
 
#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/gdkwayland.h>
#endif
 
#ifdef KICAD_WAYLAND
#include "wayland-pointer-constraints-unstable-v1.h"
#endif
 
// Set WXTRACE=KICAD_WAYLAND to see logs
const wxString traceWayland = wxS( "KICAD_WAYLAND" );
 
 
bool KIPLATFORM::UI::IsDarkTheme()
{
 wxColour bg = wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW );
 
 // Weighted W3C formula
 double brightness = ( bg.Red() / 255.0 ) * 0.299 +
 ( bg.Green() / 255.0 ) * 0.587 +
 ( bg.Blue() / 255.0 ) * 0.117;
 
 return brightness < 0.5;
}
 
 
wxColour KIPLATFORM::UI::GetDialogBGColour()
{
 return wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
}
 
 
void KIPLATFORM::UI::ForceFocus( wxWindow* aWindow )
{
 aWindow->SetFocus();
}
 
 
bool KIPLATFORM::UI::IsWindowActive( wxWindow* aWindow )
{
 if( !aWindow )
 return false;
 
 GtkWindow* window = GTK_WINDOW( aWindow->GetHandle() );
 
 if( window )
 return gtk_window_is_active( window );
 
 // We shouldn't really ever reach this point
 return false;
}
 
 
void KIPLATFORM::UI::ReparentQuasiModal( wxNonOwnedWindow* aWindow )
{
 // Not needed on this platform
}
 
 
void KIPLATFORM::UI::FixupCancelButtonCmdKeyCollision( wxWindow *aWindow )
{
 // Not needed on this platform
}
 
 
bool KIPLATFORM::UI::IsStockCursorOk( wxStockCursor aCursor )
{
 switch( aCursor )
 {
 case wxCURSOR_BULLSEYE:
 case wxCURSOR_HAND:
 case wxCURSOR_ARROW:
 case wxCURSOR_BLANK:
 return true;
 default:
 return false;
 }
}
 
 
static void disable_area_apply_attributes_cb( GtkWidget* pItem, gpointer userdata )
{
 // GTK needs this enormous chain to get the actual type of item that we want
 GtkMenuItem* pMenuItem = GTK_MENU_ITEM( pItem );
 GtkWidget* child = gtk_bin_get_child( GTK_BIN( pMenuItem ) );
 GtkCellView* pCellView = GTK_CELL_VIEW( child );
 GtkCellLayout* pCellLayout = GTK_CELL_LAYOUT( pCellView );
 GtkCellArea* pCellArea = gtk_cell_layout_get_area( pCellLayout );
 
 g_signal_handlers_block_matched( pCellArea, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, userdata );
}
 
 
void KIPLATFORM::UI::LargeChoiceBoxHack( wxChoice* aChoice )
{
 AtkObject* atkObj = gtk_combo_box_get_popup_accessible( GTK_COMBO_BOX( aChoice->m_widget ) );
 
 if( !atkObj || !GTK_IS_ACCESSIBLE( atkObj ) )
 return;
 
 GtkWidget* widget = gtk_accessible_get_widget( GTK_ACCESSIBLE( atkObj ) );
 
 if( !widget || !GTK_IS_MENU( widget ) )
 return;
 
 GtkMenu* menu = GTK_MENU( widget );
 
 gtk_container_foreach( GTK_CONTAINER( menu ), disable_area_apply_attributes_cb, menu );
}
 
 
void KIPLATFORM::UI::EllipsizeChoiceBox( wxChoice* aChoice )
{
 // This function is based on the code inside the function post_process_ui in
 // gtkfilechooserwidget.c
 GList* cells = gtk_cell_layout_get_cells( GTK_CELL_LAYOUT( aChoice->m_widget ) );
 
 if( !cells )
 return;
 
 GtkCellRenderer* cell = (GtkCellRenderer*) cells->data;
 
 if( !cell )
 return;
 
 g_object_set( G_OBJECT( cell ), "ellipsize", PANGO_ELLIPSIZE_END, nullptr );
 
 // Only the list of cells must be freed, the renderer isn't ours to free
 g_list_free( cells );
}
 
 
double KIPLATFORM::UI::GetPixelScaleFactor( const wxWindow* aWindow )
{
 double val = 1.0;
 
 GtkWidget* widget = static_cast<GtkWidget*>( aWindow->GetHandle() );
 
 if( widget && gtk_check_version( 3, 10, 0 ) == nullptr )
 val = gtk_widget_get_scale_factor( widget );
 
 return val;
}
 
 
double KIPLATFORM::UI::GetContentScaleFactor( const wxWindow* aWindow )
{
 // TODO: Do we need something different here?
 return GetPixelScaleFactor( aWindow );
}
 
 
wxSize KIPLATFORM::UI::GetUnobscuredSize( const wxWindow* aWindow )
{
 return wxSize( aWindow->GetSize().GetX() - wxSystemSettings::GetMetric( wxSYS_VSCROLL_X ),
 aWindow->GetSize().GetY() - wxSystemSettings::GetMetric( wxSYS_HSCROLL_Y ) );
}
 
 
void KIPLATFORM::UI::SetOverlayScrolling( const wxWindow* aWindow, bool overlay )
{
 gtk_scrolled_window_set_overlay_scrolling( GTK_SCROLLED_WINDOW( aWindow->GetHandle() ),
 overlay );
}
 
 
bool KIPLATFORM::UI::AllowIconsInMenus()
{
 gboolean allowed = 1;
 
 g_object_get( gtk_settings_get_default(), "gtk-menu-images", &allowed, NULL );
 
 return !!allowed;
}
 
 
#if defined( GDK_WINDOWING_WAYLAND ) && defined( KICAD_WAYLAND )
 
static bool wayland_warp_pointer( GtkWidget* aWidget, GdkDisplay* aDisplay, GdkWindow* aWindow,
 GdkDevice* aPtrDev, int aX, int aY );
 
// GDK doesn't know if we've moved the cursor using Wayland pointer constraints.
// So emulate the actual position here
static wxPoint s_warped_from;
static wxPoint s_warped_to;
 
wxPoint KIPLATFORM::UI::GetMousePosition()
{
 wxPoint wx_pos = wxGetMousePosition();
 
 if( wx_pos == s_warped_from )
 {
 wxLogTrace( traceWayland, wxS( "Faked mouse pos %d %d -> %d %d" ), wx_pos.x, wx_pos.y,
 s_warped_to.x, s_warped_to.y );
 
 return s_warped_to;
 }
 else
 {
 // Mouse has moved
 s_warped_from = wxPoint();
 s_warped_to = wxPoint();
 }
 
 return wx_pos;
}
 
#endif
 
 
void KIPLATFORM::UI::WarpPointer( wxWindow* aWindow, int aX, int aY )
{
 if( !wxGetEnv( wxT( "WAYLAND_DISPLAY" ), nullptr ) )
 {
 aWindow->WarpPointer( aX, aY );
 }
 else
 {
 GtkWidget* widget = static_cast<GtkWidget*>( aWindow->GetHandle() );
 
 GdkDisplay* disp = gtk_widget_get_display( widget );
 GdkSeat* seat = gdk_display_get_default_seat( disp );
 GdkDevice* ptrdev = gdk_seat_get_pointer( seat );
 
#if defined( GDK_WINDOWING_WAYLAND ) && defined( KICAD_WAYLAND )
 if( GDK_IS_WAYLAND_DISPLAY( disp ) )
 {
 wxPoint initialPos = wxGetMousePosition();
 GdkWindow* win = aWindow->GTKGetDrawingWindow();
 
 if( wayland_warp_pointer( widget, disp, win, ptrdev, aX, aY ) )
 {
 s_warped_from = initialPos;
 s_warped_to = aWindow->ClientToScreen( wxPoint( aX, aY ) );
 
 wxLogTrace( traceWayland, wxS( "Set warped from %d %d to %d %d" ), s_warped_from.x,
 s_warped_from.y, s_warped_to.x, s_warped_to.y );
 }
 }
#endif
#ifdef GDK_WINDOWING_X11
 if( GDK_IS_X11_DISPLAY( disp ) )
 {
 GdkWindow* win = gdk_device_get_window_at_position( ptrdev, nullptr, nullptr );
 GdkCursor* blank_cursor = gdk_cursor_new_for_display( disp, GDK_BLANK_CURSOR );
 GdkCursor* cur_cursor = gdk_window_get_cursor( win );
 
 if( cur_cursor )
 g_object_ref( cur_cursor );
 
 gdk_window_set_cursor( win, blank_cursor );
 aWindow->WarpPointer( aX, aY );
 gdk_window_set_cursor( win, cur_cursor );
 }
#endif
 }
}
 
 
void KIPLATFORM::UI::ImmControl( wxWindow* aWindow, bool aEnable )
{
}
 
//
// **** Wayland hacks ahead ****
//
 
#if defined( GDK_WINDOWING_WAYLAND ) && defined( KICAD_WAYLAND )
 
static bool s_wl_initialized = false;
static struct wl_compositor* s_wl_compositor = NULL;
static struct zwp_pointer_constraints_v1* s_wl_pointer_constraints = NULL;
static struct zwp_confined_pointer_v1* s_wl_confined_pointer = NULL;
static struct wl_region* s_wl_confinement_region = NULL;
static bool s_wl_locked_flag = false;
 
static void handle_global( void* data, struct wl_registry* registry, uint32_t name,
 const char* interface, uint32_t version )
{
 if( strcmp( interface, wl_compositor_interface.name ) == 0 )
 {
 wxLogTrace( traceWayland, "handle_global received %s", interface );
 
 s_wl_compositor = static_cast<wl_compositor*>(
 wl_registry_bind( registry, name, &wl_compositor_interface, version ) );
 }
 else if( strcmp( interface, zwp_pointer_constraints_v1_interface.name ) == 0 )
 {
 wxLogTrace( traceWayland, "handle_global received %s", interface );
 
 s_wl_pointer_constraints = static_cast<zwp_pointer_constraints_v1*>( wl_registry_bind(
 registry, name, &zwp_pointer_constraints_v1_interface, version ) );
 }
}
 
static const struct wl_registry_listener registry_listener = {
 .global = handle_global,
 .global_remove = NULL,
};
 
static void confined_handler( void* data, struct zwp_confined_pointer_v1* zwp_confined_pointer_v1 )
{
 wxLogTrace( traceWayland, wxS( "Pointer confined" ) );
}
 
static void unconfined_handler( void* data,
 struct zwp_confined_pointer_v1* zwp_confined_pointer_v1 )
{
 wxLogTrace( traceWayland, wxS( "Pointer unconfined" ) );
}
 
static const struct zwp_confined_pointer_v1_listener confined_pointer_listener = {
 .confined = confined_handler,
 .unconfined = unconfined_handler
};
 
static void locked_handler( void* data, struct zwp_locked_pointer_v1* zwp_locked_pointer_v1 )
{
 s_wl_locked_flag = true;
 wxLogTrace( traceWayland, wxS( "Pointer locked" ) );
}
 
static void unlocked_handler( void* data, struct zwp_locked_pointer_v1* zwp_locked_pointer_v1 )
{
 wxLogTrace( traceWayland, wxS( "Pointer unlocked" ) );
}
 
static const struct zwp_locked_pointer_v1_listener locked_pointer_listener = {
 .locked = locked_handler,
 .unlocked = unlocked_handler
};
 
 
static void initialize_wayland( wl_display* wldisp )
{
 if( s_wl_initialized )
 {
 return;
 }
 
 struct wl_registry* registry = wl_display_get_registry( wldisp );
 wl_registry_add_listener( registry, &registry_listener, NULL );
 wl_display_roundtrip( wldisp );
 s_wl_initialized = true;
}
 
 
struct zwp_locked_pointer_v1* s_wl_locked_pointer = NULL;
 
static int s_after_paint_handler_id = 0;
 
static void on_frame_clock_after_paint( GdkFrameClock* clock, GtkWidget* widget )
{
 if( s_wl_locked_pointer )
 {
 zwp_locked_pointer_v1_destroy( s_wl_locked_pointer );
 s_wl_locked_pointer = NULL;
 
 wxLogTrace( traceWayland, wxS( "after-paint: locked_pointer destroyed" ) );
 
 g_signal_handler_disconnect( (gpointer) clock, s_after_paint_handler_id );
 s_after_paint_handler_id = 0;
 
 // restore confinement
 if( s_wl_confinement_region != NULL )
 {
 wxLogTrace( traceWayland, wxS( "after-paint: Restoring confinement" ) );
 
 GdkDisplay* disp = gtk_widget_get_display( widget );
 GdkSeat* seat = gdk_display_get_default_seat( disp );
 GdkDevice* ptrdev = gdk_seat_get_pointer( seat );
 GdkWindow* window = gtk_widget_get_window( widget );
 
 wl_display* wldisp = gdk_wayland_display_get_wl_display( disp );
 wl_surface* wlsurf = gdk_wayland_window_get_wl_surface( window );
 wl_pointer* wlptr = gdk_wayland_device_get_wl_pointer( ptrdev );
 
 s_wl_confined_pointer = zwp_pointer_constraints_v1_confine_pointer(
 s_wl_pointer_constraints, wlsurf, wlptr, s_wl_confinement_region,
 ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_ONESHOT );
 
 wl_display_roundtrip( wldisp );
 }
 }
}
 
 
static bool wayland_warp_pointer( GtkWidget* aWidget, GdkDisplay* aDisplay, GdkWindow* aWindow,
 GdkDevice* aPtrDev, int aX, int aY )
{
 wl_display* wldisp = gdk_wayland_display_get_wl_display( aDisplay );
 wl_surface* wlsurf = gdk_wayland_window_get_wl_surface( aWindow );
 wl_pointer* wlptr = gdk_wayland_device_get_wl_pointer( aPtrDev );
 
 if( s_after_paint_handler_id )
 {
 // Previous paint not done yet
 wxLogTrace( traceWayland, wxS( "Not warping: after-paint pending" ) );
 return false;
 }
 
 initialize_wayland( wldisp );
 
 if( s_wl_locked_pointer )
 {
 // This shouldn't happen but let's be safe
 wxLogTrace( traceWayland, wxS( "** Destroying previous locked_pointer **" ) );
 zwp_locked_pointer_v1_destroy( s_wl_locked_pointer );
 wl_display_roundtrip( wldisp );
 s_wl_locked_pointer = NULL;
 }
 
 // wl_surface_commit causes an assert on GNOME, but has to be called on KDE
 // before destroying the locked pointer, so wait until GDK commits the surface.
 GdkFrameClock* frame_clock = gdk_window_get_frame_clock( aWindow );
 s_after_paint_handler_id = g_signal_connect_after(
 frame_clock, "after-paint", G_CALLBACK( on_frame_clock_after_paint ), aWidget );
 
 // temporary disable confinement to allow pointer warping
 if( s_wl_confinement_region && s_wl_confined_pointer )
 {
 zwp_confined_pointer_v1_destroy( s_wl_confined_pointer );
 wl_display_roundtrip( wldisp );
 s_wl_confined_pointer = NULL;
 }
 
 s_wl_locked_flag = false;
 
 s_wl_locked_pointer =
 zwp_pointer_constraints_v1_lock_pointer( s_wl_pointer_constraints, wlsurf, wlptr, NULL,
 ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_ONESHOT );
 
 zwp_locked_pointer_v1_add_listener(s_wl_locked_pointer, &locked_pointer_listener, NULL);
 
 gint wx, wy;
 gtk_widget_translate_coordinates( aWidget, gtk_widget_get_toplevel( aWidget ), 0, 0, &wx, &wy );
 
 zwp_locked_pointer_v1_set_cursor_position_hint( s_wl_locked_pointer, wl_fixed_from_int( aX + wx ),
 wl_fixed_from_int( aY + wy ) );
 
 // Don't call wl_surface_commit, wait for GDK because of an assert on GNOME.
 wl_display_roundtrip( wldisp ); // To receive "locked" event
 
 return s_wl_locked_flag;
}
 
 
void KIPLATFORM::UI::InfiniteDragPrepareWindow( wxWindow* aWindow )
{
 wxLogTrace( traceWayland, wxS( "InfiniteDragPrepareWindow" ) );
 
 if( s_wl_confined_pointer != NULL )
 {
 KIPLATFORM::UI::InfiniteDragReleaseWindow();
 }
 
 GtkWidget* widget = static_cast<GtkWidget*>( aWindow->GetHandle() );
 GdkDisplay* disp = gtk_widget_get_display( widget );
 
 if( !GDK_IS_WAYLAND_DISPLAY( disp ) )
 {
 return;
 }
 
 GdkSeat* seat = gdk_display_get_default_seat( disp );
 GdkDevice* ptrdev = gdk_seat_get_pointer( seat );
 GdkWindow* win = aWindow->GTKGetDrawingWindow();
 
 wl_display* wldisp = gdk_wayland_display_get_wl_display( disp );
 wl_surface* wlsurf = gdk_wayland_window_get_wl_surface( win );
 wl_pointer* wlptr = gdk_wayland_device_get_wl_pointer( ptrdev );
 
 initialize_wayland( wldisp );
 
 gint x, y, width, height;
 gdk_window_get_geometry( gdk_window_get_toplevel( win ), &x, &y, &width, &height );
 
 wxLogTrace( traceWayland, wxS( "Confine region: %d %d %d %d" ), x, y, width, height );
 
 s_wl_confinement_region = wl_compositor_create_region( s_wl_compositor );
 wl_region_add( s_wl_confinement_region, x, y, width, height );
 
 s_wl_confined_pointer = zwp_pointer_constraints_v1_confine_pointer(
 s_wl_pointer_constraints, wlsurf, wlptr, s_wl_confinement_region,
 ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_ONESHOT );
 
 zwp_confined_pointer_v1_add_listener(s_wl_confined_pointer, &confined_pointer_listener, NULL);
 
 wl_display_roundtrip( wldisp );
};
 
 
void KIPLATFORM::UI::InfiniteDragReleaseWindow()
{
 wxLogTrace( traceWayland, wxS( "InfiniteDragReleaseWindow" ) );
 
 if( s_wl_confined_pointer )
 {
 zwp_confined_pointer_v1_destroy( s_wl_confined_pointer );
 s_wl_confined_pointer = NULL;
 }
 
 if( s_wl_confinement_region )
 {
 wl_region_destroy( s_wl_confinement_region );
 s_wl_confinement_region = NULL;
 }
};
 
 
#else // No Wayland support
 
 
void KIPLATFORM::UI::InfiniteDragPrepareWindow( wxWindow* aWindow )
{
 // Not needed on X11
};
 
 
void KIPLATFORM::UI::InfiniteDragReleaseWindow()
{
 // Not needed on X11
};
 
 
wxPoint KIPLATFORM::UI::GetMousePosition()
{
 return wxGetMousePosition();
}
 
 
#endif