/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ /** * SECTION:compositor * @Title: MetaCompositor * @Short_Description: Compositor API * * At a high-level, a window is not-visible or visible. When a * window is added (with meta_compositor_add_window()) it is not visible. * meta_compositor_show_window() indicates a transition from not-visible to * visible. Some of the reasons for this: * * - Window newly created * - Window is unminimized * - Window is moved to the current desktop * - Window was made sticky * * meta_compositor_hide_window() indicates that the window has transitioned from * visible to not-visible. Some reasons include: * * - Window was destroyed * - Window is minimized * - Window is moved to a different desktop * - Window no longer sticky. * * Note that combinations are possible - a window might have first * been minimized and then moved to a different desktop. The 'effect' parameter * to meta_compositor_show_window() and meta_compositor_hide_window() is a hint * as to the appropriate effect to show the user and should not * be considered to be indicative of a state change. * * When the active workspace is changed, meta_compositor_switch_workspace() is * called first, then meta_compositor_show_window() and * meta_compositor_hide_window() are called individually for each window * affected, with an effect of META_COMP_EFFECT_NONE. * If hiding windows will affect the switch workspace animation, the * compositor needs to delay hiding the windows until the switch * workspace animation completes. * * meta_compositor_maximize_window() and meta_compositor_unmaximize_window() * are transitions within the visible state. The window is resized __before__ * the call, so it may be necessary to readjust the display based on the * old_rect to start the animation. * * meta_compositor_window_mapped() and meta_compositor_window_unmapped() are * notifications when the toplevel window (frame or client window) is mapped or * unmapped. That is, when the result of meta_window_toplevel_is_mapped() * changes. The main use of this is to drop resources when a window is unmapped. * A window will always be mapped before meta_compositor_show_window() * is called and will not be unmapped until after meta_compositor_hide_window() * is called. If the live_hidden_windows preference is set, windows will never * be unmapped. * * # Containers # * * There's two containers in the stage that are used to place window actors, here * are listed in the order in which they are painted: * * - window group, accessible with meta_get_window_group_for_screen() * - top window group, accessible with meta_get_top_window_group_for_screen() * * Mutter will place actors representing windows in the window group, except for * override-redirect windows (ie. popups and menus) which will be placed in the * top window group. */ #include #include #include "core.h" #include #include #include #include "compositor-private.h" #include #include "xprops.h" #include #include #include #include #include #include "meta-window-actor-private.h" #include "meta-window-group.h" #include "window-private.h" /* to check window->hidden */ #include "display-private.h" /* for meta_display_lookup_x_window() */ #include "meta-wayland-private.h" #include #include /* #define DEBUG_TRACE g_print */ #define DEBUG_TRACE(X) static inline gboolean composite_at_least_version (MetaDisplay *display, int maj, int min) { static int major = -1; static int minor = -1; if (major == -1) meta_display_get_compositor_version (display, &major, &minor); return (major > maj || (major == maj && minor >= min)); } static void sync_actor_stacking (MetaCompScreen *info); static void meta_finish_workspace_switch (MetaCompScreen *info) { GList *l; /* Finish hiding and showing actors for the new workspace */ for (l = info->windows; l; l = l->next) meta_window_actor_sync_visibility (l->data); /* * Fix up stacking order in case the plugin messed it up. */ sync_actor_stacking (info); /* printf ("... FINISHED DESKTOP SWITCH\n"); */ } void meta_switch_workspace_completed (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); /* FIXME -- must redo stacking order */ info->switch_workspace_in_progress--; if (info->switch_workspace_in_progress < 0) { g_warning ("Error in workspace_switch accounting!"); info->switch_workspace_in_progress = 0; } if (!info->switch_workspace_in_progress) meta_finish_workspace_switch (info); } void meta_compositor_destroy (MetaCompositor *compositor) { clutter_threads_remove_repaint_func (compositor->repaint_func_id); } static void add_win (MetaWindow *window) { MetaScreen *screen = meta_window_get_screen (window); MetaCompScreen *info = meta_screen_get_compositor_data (screen); g_return_if_fail (info != NULL); meta_window_actor_new (window); sync_actor_stacking (info); } static void process_damage (MetaCompositor *compositor, XDamageNotifyEvent *event, MetaWindow *window) { MetaWindowActor *window_actor; if (window == NULL) return; window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (window_actor == NULL) return; meta_window_actor_process_x11_damage (window_actor, event); } static void process_property_notify (MetaCompositor *compositor, XPropertyEvent *event, MetaWindow *window) { MetaWindowActor *window_actor; if (window == NULL) return; window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (window_actor == NULL) return; /* Check for the opacity changing */ if (event->atom == compositor->atom_net_wm_window_opacity) { meta_window_actor_update_opacity (window_actor); DEBUG_TRACE ("process_property_notify: net_wm_window_opacity\n"); return; } DEBUG_TRACE ("process_property_notify: unknown\n"); } static Window get_output_window (MetaScreen *screen) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdisplay = meta_display_get_xdisplay (display); Window output, xroot; XWindowAttributes attr; long event_mask; unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 }; XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits }; xroot = meta_screen_get_xroot (screen); output = XCompositeGetOverlayWindow (xdisplay, xroot); meta_core_add_old_event_mask (xdisplay, output, &mask); XISetMask (mask.mask, XI_KeyPress); XISetMask (mask.mask, XI_KeyRelease); XISetMask (mask.mask, XI_ButtonPress); XISetMask (mask.mask, XI_ButtonRelease); XISetMask (mask.mask, XI_Enter); XISetMask (mask.mask, XI_Leave); XISetMask (mask.mask, XI_FocusIn); XISetMask (mask.mask, XI_FocusOut); XISetMask (mask.mask, XI_Motion); XISelectEvents (xdisplay, output, &mask, 1); event_mask = ExposureMask | PropertyChangeMask; if (XGetWindowAttributes (xdisplay, output, &attr)) event_mask |= attr.your_event_mask; XSelectInput (xdisplay, output, event_mask); return output; } /** * meta_get_stage_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The #ClutterStage for the screen */ ClutterActor * meta_get_stage_for_screen (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (!info) return NULL; return info->stage; } /** * meta_get_window_group_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The window group corresponding to @screen */ ClutterActor * meta_get_window_group_for_screen (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (!info) return NULL; return info->window_group; } /** * meta_get_top_window_group_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The top window group corresponding to @screen */ ClutterActor * meta_get_top_window_group_for_screen (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (!info) return NULL; return info->top_window_group; } /** * meta_get_window_actors: * @screen: a #MetaScreen * * Returns: (transfer none) (element-type Clutter.Actor): The set of #MetaWindowActor on @screen */ GList * meta_get_window_actors (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (!info) return NULL; return info->windows; } static void do_set_stage_input_region (MetaScreen *screen, XserverRegion region) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); Window xstage = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage)); XFixesSetWindowShapeRegion (xdpy, xstage, ShapeInput, 0, 0, region); /* It's generally a good heuristic that when a crossing event is generated because * we reshape the overlay, we don't want it to affect focus-follows-mouse focus - * it's not the user doing something, it's the environment changing under the user. */ meta_display_add_ignored_crossing_serial (display, XNextRequest (xdpy)); XFixesSetWindowShapeRegion (xdpy, info->output, ShapeInput, 0, 0, region); } void meta_set_stage_input_region (MetaScreen *screen, XserverRegion region) { /* As a wayland compositor we can simply ignore all this trickery * for setting an input region on the stage for capturing events in * clutter since all input comes to us first and we get to choose * who else sees them. */ if (!meta_is_wayland_compositor ()) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); if (info->stage && info->output) { do_set_stage_input_region (screen, region); } else { /* Reset info->pending_input_region if one existed before and set the new * one to use it later. */ if (info->pending_input_region) { XFixesDestroyRegion (xdpy, info->pending_input_region); info->pending_input_region = None; } if (region != None) { info->pending_input_region = XFixesCreateRegion (xdpy, NULL, 0); XFixesCopyRegion (xdpy, info->pending_input_region, region); } } } } void meta_empty_stage_input_region (MetaScreen *screen) { /* Using a static region here is a bit hacky, but Metacity never opens more than * one XDisplay, so it works fine. */ static XserverRegion region = None; if (region == None) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); region = XFixesCreateRegion (xdpy, NULL, 0); } meta_set_stage_input_region (screen, region); } void meta_focus_stage_window (MetaScreen *screen, guint32 timestamp) { ClutterStage *stage; Window window; stage = CLUTTER_STAGE (meta_get_stage_for_screen (screen)); if (!stage) return; if (!meta_is_wayland_compositor ()) { window = clutter_x11_get_stage_window (stage); if (window == None) return; meta_display_set_input_focus_xwindow (screen->display, screen, META_FOCUS_STAGE, window, timestamp); } else { meta_display_set_input_focus_xwindow (screen->display, screen, META_FOCUS_STAGE, None, timestamp); } } gboolean meta_stage_is_focused (MetaScreen *screen) { ClutterStage *stage; stage = CLUTTER_STAGE (meta_get_stage_for_screen (screen)); if (!stage) return FALSE; return (screen->display->focus_type == META_FOCUS_STAGE); } gboolean meta_begin_modal_for_plugin (MetaScreen *screen, MetaPlugin *plugin, MetaModalOptions options, guint32 timestamp) { /* To some extent this duplicates code in meta_display_begin_grab_op(), but there * are significant differences in how we handle grabs that make it difficult to * merge the two. */ MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); MetaCompositor *compositor = display->compositor; ClutterStage *stage; Window grab_window; Cursor cursor = None; gboolean pointer_grabbed = FALSE; gboolean keyboard_grabbed = FALSE; int result; stage = CLUTTER_STAGE (meta_get_stage_for_screen (screen)); if (!stage) return FALSE; grab_window = clutter_x11_get_stage_window (stage); if (compositor->modal_plugin != NULL || display->grab_op != META_GRAB_OP_NONE) return FALSE; if ((options & META_MODAL_POINTER_ALREADY_GRABBED) == 0) { unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 }; XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits }; XISetMask (mask.mask, XI_ButtonPress); XISetMask (mask.mask, XI_ButtonRelease); XISetMask (mask.mask, XI_Enter); XISetMask (mask.mask, XI_Leave); XISetMask (mask.mask, XI_Motion); result = XIGrabDevice (xdpy, META_VIRTUAL_CORE_POINTER_ID, grab_window, timestamp, cursor, XIGrabModeAsync, XIGrabModeAsync, False, /* owner_events */ &mask); if (result != Success) goto fail; pointer_grabbed = TRUE; } if ((options & META_MODAL_KEYBOARD_ALREADY_GRABBED) == 0) { unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 }; XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits }; XISetMask (mask.mask, XI_KeyPress); XISetMask (mask.mask, XI_KeyRelease); result = XIGrabDevice (xdpy, META_VIRTUAL_CORE_KEYBOARD_ID, grab_window, timestamp, None, XIGrabModeAsync, XIGrabModeAsync, False, /* owner_events */ &mask); if (result != Success) goto fail; keyboard_grabbed = TRUE; } display->grab_op = META_GRAB_OP_COMPOSITOR; display->grab_window = NULL; display->grab_screen = screen; display->grab_have_pointer = TRUE; display->grab_have_keyboard = TRUE; compositor->modal_plugin = plugin; return TRUE; fail: if (pointer_grabbed) XIUngrabDevice (xdpy, META_VIRTUAL_CORE_POINTER_ID, timestamp); if (keyboard_grabbed) XIUngrabDevice (xdpy, META_VIRTUAL_CORE_KEYBOARD_ID, timestamp); return FALSE; } void meta_end_modal_for_plugin (MetaScreen *screen, MetaPlugin *plugin, guint32 timestamp) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); MetaCompositor *compositor = display->compositor; g_return_if_fail (compositor->modal_plugin == plugin); XIUngrabDevice (xdpy, META_VIRTUAL_CORE_POINTER_ID, timestamp); XIUngrabDevice (xdpy, META_VIRTUAL_CORE_KEYBOARD_ID, timestamp); display->grab_op = META_GRAB_OP_NONE; display->grab_window = NULL; display->grab_screen = NULL; display->grab_have_pointer = FALSE; display->grab_have_keyboard = FALSE; compositor->modal_plugin = NULL; } /* This is used when reloading plugins to make sure we don't have * a left-over modal grab for this screen. */ void meta_check_end_modal (MetaScreen *screen) { MetaDisplay *display = meta_screen_get_display (screen); MetaCompositor *compositor = display->compositor; if (compositor->modal_plugin && meta_plugin_get_screen (compositor->modal_plugin) == screen) { meta_end_modal_for_plugin (screen, compositor->modal_plugin, CurrentTime); } } static void after_stage_paint (ClutterStage *stage, gpointer data) { MetaCompScreen *info = (MetaCompScreen*) data; GList *l; for (l = info->windows; l; l = l->next) meta_window_actor_post_paint (l->data); } static void redirect_windows (MetaCompositor *compositor, MetaScreen *screen) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdisplay = meta_display_get_xdisplay (display); Window xroot = meta_screen_get_xroot (screen); int screen_number = meta_screen_get_screen_number (screen); guint n_retries; guint max_retries; /* If we're running with wayland, connected to a headless xwayland * server then all the windows are implicitly redirected offscreen * already and it would generate an error to try and explicitly * redirect them via XCompositeRedirectSubwindows() */ if (meta_get_replace_current_wm ()) max_retries = 5; else max_retries = 1; n_retries = 0; /* Some compositors (like old versions of Mutter) might not properly unredirect * subwindows before destroying the WM selection window; so we wait a while * for such a compositor to exit before giving up. */ while (TRUE) { meta_error_trap_push_with_return (display); XCompositeRedirectSubwindows (xdisplay, xroot, CompositeRedirectManual); XSync (xdisplay, FALSE); if (!meta_error_trap_pop_with_return (display)) break; if (n_retries == max_retries) { /* This probably means that a non-WM compositor like xcompmgr is running; * we have no way to get it to exit */ meta_fatal (_("Another compositing manager is already running on screen %i on display \"%s\"."), screen_number, display->name); } n_retries++; g_usleep (G_USEC_PER_SEC); } } void meta_compositor_manage_screen (MetaCompositor *compositor, MetaScreen *screen) { MetaCompScreen *info; MetaDisplay *display = meta_screen_get_display (screen); Display *xdisplay = meta_display_get_xdisplay (display); Window xwin; gint width, height; MetaWaylandCompositor *wayland_compositor; /* Check if the screen is already managed */ if (meta_screen_get_compositor_data (screen)) return; info = g_new0 (MetaCompScreen, 1); /* * We use an empty input region for Clutter as a default because that allows * the user to interact with all the windows displayed on the screen. * We have to initialize info->pending_input_region to an empty region explicitly, * because None value is used to mean that the whole screen is an input region. */ if (!meta_is_wayland_compositor ()) info->pending_input_region = XFixesCreateRegion (xdisplay, NULL, 0); else { /* Stage input region trickery isn't needed when we're running as a * wayland compositor. */ info->pending_input_region = None; } info->screen = screen; meta_screen_set_compositor_data (screen, info); info->output = None; info->windows = NULL; meta_screen_set_cm_selection (screen); /* We will have already created a stage if running as a wayland * compositor... */ if (meta_is_wayland_compositor ()) { wayland_compositor = meta_wayland_compositor_get_default (); info->stage = wayland_compositor->stage; meta_screen_get_size (screen, &width, &height); clutter_actor_set_size (info->stage, width, height); } else { info->stage = clutter_stage_new (); meta_screen_get_size (screen, &width, &height); clutter_actor_realize (info->stage); xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage)); XResizeWindow (xdisplay, xwin, width, height); { long event_mask; unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 }; XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits }; XWindowAttributes attr; meta_core_add_old_event_mask (xdisplay, xwin, &mask); XISetMask (mask.mask, XI_KeyPress); XISetMask (mask.mask, XI_KeyRelease); XISetMask (mask.mask, XI_ButtonPress); XISetMask (mask.mask, XI_ButtonRelease); XISetMask (mask.mask, XI_Enter); XISetMask (mask.mask, XI_Leave); XISetMask (mask.mask, XI_FocusIn); XISetMask (mask.mask, XI_FocusOut); XISetMask (mask.mask, XI_Motion); XIClearMask (mask.mask, XI_TouchBegin); XIClearMask (mask.mask, XI_TouchEnd); XIClearMask (mask.mask, XI_TouchUpdate); XISelectEvents (xdisplay, xwin, &mask, 1); event_mask = ExposureMask | PropertyChangeMask | StructureNotifyMask; if (XGetWindowAttributes (xdisplay, xwin, &attr)) event_mask |= attr.your_event_mask; XSelectInput (xdisplay, xwin, event_mask); } } clutter_stage_set_paint_callback (CLUTTER_STAGE (info->stage), after_stage_paint, info, NULL); clutter_stage_set_sync_delay (CLUTTER_STAGE (info->stage), META_SYNC_DELAY); info->window_group = meta_window_group_new (screen); info->top_window_group = meta_window_group_new (screen); clutter_actor_add_child (info->stage, info->window_group); clutter_actor_add_child (info->stage, info->top_window_group); info->plugin_mgr = meta_plugin_manager_new (screen); if (meta_is_wayland_compositor ()) { /* NB: When running as a wayland compositor we don't need an X * composite overlay window, and we don't need to play any input * region tricks to redirect events into clutter. */ info->output = None; } else { /* * Delay the creation of the overlay window as long as we can, to avoid * blanking out the screen. This means that during the plugin loading, the * overlay window is not accessible; if the plugin needs to access it * directly, it should hook into the "show" signal on stage, and do * its stuff there. */ info->output = get_output_window (screen); XReparentWindow (xdisplay, xwin, info->output, 0, 0); /* Make sure there isn't any left-over output shape on the * overlay window by setting the whole screen to be an * output region. * * Note: there doesn't seem to be any real chance of that * because the X server will destroy the overlay window * when the last client using it exits. */ XFixesSetWindowShapeRegion (xdisplay, info->output, ShapeBounding, 0, 0, None); do_set_stage_input_region (screen, info->pending_input_region); if (info->pending_input_region != None) { XFixesDestroyRegion (xdisplay, info->pending_input_region); info->pending_input_region = None; } /* Map overlay window before redirecting windows offscreen so we catch their * contents until we show the stage. */ XMapWindow (xdisplay, info->output); redirect_windows (compositor, screen); } } void meta_compositor_unmanage_screen (MetaCompositor *compositor, MetaScreen *screen) { if (!meta_is_wayland_compositor ()) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdisplay = meta_display_get_xdisplay (display); Window xroot = meta_screen_get_xroot (screen); /* This is the most important part of cleanup - we have to do this * before giving up the window manager selection or the next * window manager won't be able to redirect subwindows */ XCompositeUnredirectSubwindows (xdisplay, xroot, CompositeRedirectManual); } } /* * Shapes the cow so that the given window is exposed, * when metaWindow is NULL it clears the shape again */ static void meta_shape_cow_for_window (MetaScreen *screen, MetaWindow *metaWindow) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); Display *xdisplay = meta_display_get_xdisplay (meta_screen_get_display (screen)); if (metaWindow == NULL) XFixesSetWindowShapeRegion (xdisplay, info->output, ShapeBounding, 0, 0, None); else { XserverRegion output_region; XRectangle screen_rect, window_bounds; int width, height; MetaRectangle rect; meta_window_get_outer_rect (metaWindow, &rect); window_bounds.x = rect.x; window_bounds.y = rect.y; window_bounds.width = rect.width; window_bounds.height = rect.height; meta_screen_get_size (screen, &width, &height); screen_rect.x = 0; screen_rect.y = 0; screen_rect.width = width; screen_rect.height = height; output_region = XFixesCreateRegion (xdisplay, &window_bounds, 1); XFixesInvertRegion (xdisplay, output_region, &screen_rect, output_region); XFixesSetWindowShapeRegion (xdisplay, info->output, ShapeBounding, 0, 0, output_region); XFixesDestroyRegion (xdisplay, output_region); } } void meta_compositor_add_window (MetaCompositor *compositor, MetaWindow *window) { MetaScreen *screen = meta_window_get_screen (window); MetaDisplay *display = meta_screen_get_display (screen); DEBUG_TRACE ("meta_compositor_add_window\n"); meta_error_trap_push (display); add_win (window); meta_error_trap_pop (display); } void meta_compositor_remove_window (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor = NULL; MetaScreen *screen; MetaCompScreen *info; DEBUG_TRACE ("meta_compositor_remove_window\n"); window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; if (!meta_is_wayland_compositor ()) { screen = meta_window_get_screen (window); info = meta_screen_get_compositor_data (screen); if (window_actor == info->unredirected_window) { meta_window_actor_set_redirected (window_actor, TRUE); meta_shape_cow_for_window (meta_window_get_screen (meta_window_actor_get_meta_window (info->unredirected_window)), NULL); info->unredirected_window = NULL; } } meta_window_actor_destroy (window_actor); } void meta_compositor_set_updates_frozen (MetaCompositor *compositor, MetaWindow *window, gboolean updates_frozen) { MetaWindowActor *window_actor; DEBUG_TRACE ("meta_compositor_set_updates_frozen\n"); window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_set_updates_frozen (window_actor, updates_frozen); } void meta_compositor_queue_frame_drawn (MetaCompositor *compositor, MetaWindow *window, gboolean no_delay_frame) { MetaWindowActor *window_actor; DEBUG_TRACE ("meta_compositor_queue_frame_drawn\n"); window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_queue_frame_drawn (window_actor, no_delay_frame); } static gboolean is_grabbed_event (MetaDisplay *display, XEvent *event) { if (event->type == GenericEvent && event->xcookie.extension == display->xinput_opcode) { XIEvent *xev = (XIEvent *) event->xcookie.data; switch (xev->evtype) { case XI_Motion: case XI_ButtonPress: case XI_ButtonRelease: case XI_KeyPress: case XI_KeyRelease: return TRUE; } } return FALSE; } void meta_compositor_window_x11_shape_changed (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor; window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_update_shape (window_actor); } /* Clutter makes the assumption that there is only one X window * per stage, which is a valid assumption to make for a generic * application toolkit. As such, it will ignore any events sent * to the a stage that isn't its X window. * * When a user clicks on what she thinks is the wallpaper, she * is actually clicking on the guard window, which is an entirely * separate top-level override-redirect window in the hierarchy. * We want to recieve events on this guard window so that users * can right-click on the background actor. We do this by telling * Clutter a little white lie, by transforming clicks on the guard * window to become clicks on the stage window, allowing Clutter * to process the event normally. */ static void maybe_spoof_guard_window_event_as_stage_event (MetaCompScreen *info, XEvent *event) { MetaDisplay *display = meta_screen_get_display (info->screen); if (event->type == GenericEvent && event->xcookie.extension == display->xinput_opcode) { XIEvent *input_event = (XIEvent *) event->xcookie.data; /* Only care about pointer events for now. */ switch (input_event->evtype) { case XI_Motion: case XI_ButtonPress: case XI_ButtonRelease: { XIDeviceEvent *device_event = ((XIDeviceEvent *) input_event); if (device_event->event == info->screen->guard_window) { Window xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage)); device_event->event = xwin; } } break; default: break; } } } /** * meta_compositor_process_event: (skip) * @compositor: * @event: * @window: * */ gboolean meta_compositor_process_event (MetaCompositor *compositor, XEvent *event, MetaWindow *window) { if (compositor->modal_plugin && is_grabbed_event (compositor->display, event)) { MetaPluginClass *klass = META_PLUGIN_GET_CLASS (compositor->modal_plugin); if (klass->xevent_filter) klass->xevent_filter (compositor->modal_plugin, event); /* We always consume events even if the plugin says it didn't handle them; * exclusive is exclusive */ return TRUE; } if (window) { MetaCompScreen *info; MetaScreen *screen; screen = meta_window_get_screen (window); info = meta_screen_get_compositor_data (screen); if (meta_plugin_manager_xevent_filter (info->plugin_mgr, event)) { DEBUG_TRACE ("meta_compositor_process_event (filtered,window==NULL)\n"); return TRUE; } } else { GSList *l; l = meta_display_get_screens (compositor->display); while (l) { MetaScreen *screen = l->data; MetaCompScreen *info; info = meta_screen_get_compositor_data (screen); maybe_spoof_guard_window_event_as_stage_event (info, event); if (meta_plugin_manager_xevent_filter (info->plugin_mgr, event)) { DEBUG_TRACE ("meta_compositor_process_event (filtered,window==NULL)\n"); return TRUE; } l = l->next; } } switch (event->type) { case PropertyNotify: process_property_notify (compositor, (XPropertyEvent *) event, window); break; default: if (!meta_is_wayland_compositor () && event->type == meta_display_get_damage_event_base (compositor->display) + XDamageNotify) { /* Core code doesn't handle damage events, so we need to extract the MetaWindow * ourselves */ if (window == NULL) { Window xwin = ((XDamageNotifyEvent *) event)->drawable; window = meta_display_lookup_x_window (compositor->display, xwin); } DEBUG_TRACE ("meta_compositor_process_event (process_damage)\n"); process_damage (compositor, (XDamageNotifyEvent *) event, window); } break; } /* Clutter needs to know about MapNotify events otherwise it will think the stage is invisible */ if (!meta_is_wayland_compositor () && event->type == MapNotify) clutter_x11_handle_event (event); /* The above handling is basically just "observing" the events, so we return * FALSE to indicate that the event should not be filtered out; if we have * GTK+ windows in the same process, GTK+ needs the ConfigureNotify event, for example. */ return FALSE; } gboolean meta_compositor_filter_keybinding (MetaCompositor *compositor, MetaScreen *screen, MetaKeyBinding *binding) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (info->plugin_mgr) return meta_plugin_manager_filter_keybinding (info->plugin_mgr, binding); return FALSE; } void meta_compositor_show_window (MetaCompositor *compositor, MetaWindow *window, MetaCompEffect effect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_show_window\n"); if (!window_actor) return; meta_window_actor_show (window_actor, effect); } void meta_compositor_hide_window (MetaCompositor *compositor, MetaWindow *window, MetaCompEffect effect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_hide_window\n"); if (!window_actor) return; meta_window_actor_hide (window_actor, effect); } void meta_compositor_maximize_window (MetaCompositor *compositor, MetaWindow *window, MetaRectangle *old_rect, MetaRectangle *new_rect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_maximize_window\n"); if (!window_actor) return; meta_window_actor_maximize (window_actor, old_rect, new_rect); } void meta_compositor_unmaximize_window (MetaCompositor *compositor, MetaWindow *window, MetaRectangle *old_rect, MetaRectangle *new_rect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_unmaximize_window\n"); if (!window_actor) return; meta_window_actor_unmaximize (window_actor, old_rect, new_rect); } void meta_compositor_switch_workspace (MetaCompositor *compositor, MetaScreen *screen, MetaWorkspace *from, MetaWorkspace *to, MetaMotionDirection direction) { MetaCompScreen *info; gint to_indx, from_indx; info = meta_screen_get_compositor_data (screen); to_indx = meta_workspace_index (to); from_indx = meta_workspace_index (from); DEBUG_TRACE ("meta_compositor_switch_workspace\n"); if (!info) /* During startup before manage_screen() */ return; info->switch_workspace_in_progress++; if (!info->plugin_mgr || !meta_plugin_manager_switch_workspace (info->plugin_mgr, from_indx, to_indx, direction)) { info->switch_workspace_in_progress--; /* We have to explicitely call this to fix up stacking order of the * actors; this is because the abs stacking position of actors does not * necessarily change during the window hiding/unhiding, only their * relative position toward the destkop window. */ meta_finish_workspace_switch (info); } } static void sync_actor_stacking (MetaCompScreen *info) { GList *children; GList *expected_window_node; GList *tmp; GList *old; GList *backgrounds; gboolean has_windows; gboolean reordered; /* NB: The first entries in the lists are stacked the lowest */ /* Restacking will trigger full screen redraws, so it's worth a * little effort to make sure we actually need to restack before * we go ahead and do it */ children = clutter_actor_get_children (info->window_group); reordered = FALSE; /* We allow for actors in the window group other than the actors we * know about, but it's up to a plugin to try and keep them stacked correctly * (we really need extra API to make that reliable.) */ /* First we collect a list of all backgrounds, and check if they're at the * bottom. Then we check if the window actors are in the correct sequence */ backgrounds = NULL; expected_window_node = info->windows; for (old = children; old != NULL; old = old->next) { ClutterActor *actor = old->data; if (META_IS_BACKGROUND_GROUP (actor) || META_IS_BACKGROUND_ACTOR (actor)) { backgrounds = g_list_prepend (backgrounds, actor); if (has_windows) reordered = TRUE; } else if (META_IS_WINDOW_ACTOR (actor) && !reordered) { has_windows = TRUE; if (expected_window_node != NULL && actor == expected_window_node->data) expected_window_node = expected_window_node->next; else reordered = TRUE; } } g_list_free (children); if (!reordered) { g_list_free (backgrounds); return; } /* reorder the actors by lowering them in turn to the bottom of the stack. * windows first, then background. * * We reorder the actors even if they're not parented to the window group, * to allow stacking to work with intermediate actors (eg during effects) */ for (tmp = g_list_last (info->windows); tmp != NULL; tmp = tmp->prev) { ClutterActor *actor = tmp->data, *parent; parent = clutter_actor_get_parent (actor); clutter_actor_set_child_below_sibling (parent, actor, NULL); } /* we prepended the backgrounds above so the last actor in the list * should get lowered to the bottom last. */ for (tmp = backgrounds; tmp != NULL; tmp = tmp->next) { ClutterActor *actor = tmp->data, *parent; parent = clutter_actor_get_parent (actor); clutter_actor_set_child_below_sibling (parent, actor, NULL); } g_list_free (backgrounds); } void meta_compositor_sync_stack (MetaCompositor *compositor, MetaScreen *screen, GList *stack) { GList *old_stack; MetaCompScreen *info = meta_screen_get_compositor_data (screen); DEBUG_TRACE ("meta_compositor_sync_stack\n"); /* This is painful because hidden windows that we are in the process * of animating out of existence. They'll be at the bottom of the * stack of X windows, but we want to leave them in their old position * until the animation effect finishes. */ /* Sources: first window is the highest */ stack = g_list_copy (stack); /* The new stack of MetaWindow */ old_stack = g_list_reverse (info->windows); /* The old stack of MetaWindowActor */ info->windows = NULL; while (TRUE) { MetaWindowActor *old_actor = NULL, *stack_actor = NULL, *actor; MetaWindow *old_window = NULL, *stack_window = NULL, *window; /* Find the remaining top actor in our existing stack (ignoring * windows that have been hidden and are no longer animating) */ while (old_stack) { old_actor = old_stack->data; old_window = meta_window_actor_get_meta_window (old_actor); if (old_window->hidden && !meta_window_actor_effect_in_progress (old_actor)) { old_stack = g_list_delete_link (old_stack, old_stack); old_actor = NULL; } else break; } /* And the remaining top actor in the new stack */ while (stack) { stack_window = stack->data; stack_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (stack_window)); if (!stack_actor) { meta_verbose ("Failed to find corresponding MetaWindowActor " "for window %s\n", meta_window_get_description (stack_window)); stack = g_list_delete_link (stack, stack); } else break; } if (!old_actor && !stack_actor) /* Nothing more to stack */ break; /* We usually prefer the window in the new stack, but if if we * found a hidden window in the process of being animated out * of existence in the old stack we use that instead. We've * filtered out non-animating hidden windows above. */ if (old_actor && (!stack_actor || old_window->hidden)) { actor = old_actor; window = old_window; } else { actor = stack_actor; window = stack_window; } /* OK, we know what actor we want next. Add it to our window * list, and remove it from both source lists. (It will * be at the front of at least one, hopefully it will be * near the front of the other.) */ info->windows = g_list_prepend (info->windows, actor); stack = g_list_remove (stack, window); old_stack = g_list_remove (old_stack, actor); } sync_actor_stacking (info); } void meta_compositor_window_mapped (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_window_mapped\n"); if (!window_actor) return; meta_window_actor_mapped (window_actor); } void meta_compositor_window_unmapped (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_window_unmapped\n"); if (!window_actor) return; meta_window_actor_unmapped (window_actor); } void meta_compositor_sync_window_geometry (MetaCompositor *compositor, MetaWindow *window, gboolean did_placement) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); MetaScreen *screen = meta_window_get_screen (window); MetaCompScreen *info = meta_screen_get_compositor_data (screen); DEBUG_TRACE ("meta_compositor_sync_window_geometry\n"); g_return_if_fail (info); if (!window_actor) return; meta_window_actor_sync_actor_geometry (window_actor, did_placement); } void meta_compositor_sync_screen_size (MetaCompositor *compositor, MetaScreen *screen, guint width, guint height) { MetaDisplay *display = meta_screen_get_display (screen); MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (meta_is_wayland_compositor ()) { /* FIXME: when we support a sliced stage, this is the place to do it But! This is not the place to apply KMS config, here we only notify Clutter/Cogl/GL that the framebuffer sizes changed. And because for now clutter does not do sliced, we use one framebuffer the size of the whole screen, and when running on bare metal MetaMonitorManager will do the necessary tricks to show the right portions on the right screens. */ clutter_actor_set_size (info->stage, width, height); } else { Display *xdisplay; Window xwin; DEBUG_TRACE ("meta_compositor_sync_screen_size\n"); g_return_if_fail (info); xdisplay = meta_display_get_xdisplay (display); xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage)); XResizeWindow (xdisplay, xwin, width, height); } meta_verbose ("Changed size for stage on screen %d to %dx%d\n", meta_screen_get_screen_number (screen), width, height); } static void frame_callback (CoglOnscreen *onscreen, CoglFrameEvent event, CoglFrameInfo *frame_info, void *user_data) { MetaCompScreen *info = user_data; GList *l; if (event == COGL_FRAME_EVENT_COMPLETE) { gint64 presentation_time_cogl = cogl_frame_info_get_presentation_time (frame_info); gint64 presentation_time; if (presentation_time_cogl != 0) { /* Cogl reports presentation in terms of its own clock, which is * guaranteed to be in nanoseconds but with no specified base. The * normal case with the open source GPU drivers on Linux 3.8 and * newer is that the base of cogl_get_clock_time() is that of * clock_gettime(CLOCK_MONOTONIC), so the same as g_get_monotonic_time), * but there's no exposure of that through the API. clock_gettime() * is fairly fast, so calling it twice and subtracting to get a * nearly-zero number is acceptable, if a litle ugly. */ CoglContext *context = cogl_framebuffer_get_context (COGL_FRAMEBUFFER (onscreen)); gint64 current_cogl_time = cogl_get_clock_time (context); gint64 current_monotonic_time = g_get_monotonic_time (); presentation_time = current_monotonic_time + (presentation_time_cogl - current_cogl_time) / 1000; } else { presentation_time = 0; } for (l = info->windows; l; l = l->next) meta_window_actor_frame_complete (l->data, frame_info, presentation_time); } } static void pre_paint_windows (MetaCompScreen *info) { GList *l; MetaWindowActor *top_window; MetaWindowActor *expected_unredirected_window = NULL; if (info->onscreen == NULL) { info->onscreen = COGL_ONSCREEN (cogl_get_draw_framebuffer ()); info->frame_closure = cogl_onscreen_add_frame_callback (info->onscreen, frame_callback, info, NULL); } if (info->windows == NULL) return; if (!meta_is_wayland_compositor ()) { top_window = g_list_last (info->windows)->data; if (meta_window_actor_should_unredirect (top_window) && info->disable_unredirect_count == 0) expected_unredirected_window = top_window; if (info->unredirected_window != expected_unredirected_window) { if (info->unredirected_window != NULL) { meta_window_actor_set_redirected (info->unredirected_window, TRUE); meta_shape_cow_for_window (meta_window_get_screen (meta_window_actor_get_meta_window (info->unredirected_window)), NULL); } if (expected_unredirected_window != NULL) { meta_shape_cow_for_window (meta_window_get_screen (meta_window_actor_get_meta_window (top_window)), meta_window_actor_get_meta_window (top_window)); meta_window_actor_set_redirected (top_window, FALSE); } info->unredirected_window = expected_unredirected_window; } } for (l = info->windows; l; l = l->next) meta_window_actor_pre_paint (l->data); } static gboolean meta_repaint_func (gpointer data) { MetaCompositor *compositor = data; GSList *screens = meta_display_get_screens (compositor->display); GSList *l; for (l = screens; l; l = l->next) { MetaScreen *screen = l->data; MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (!info) continue; pre_paint_windows (info); } return TRUE; } static void on_shadow_factory_changed (MetaShadowFactory *factory, MetaCompositor *compositor) { GSList *screens = meta_display_get_screens (compositor->display); GList *l; GSList *sl; for (sl = screens; sl; sl = sl->next) { MetaScreen *screen = sl->data; MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (!info) continue; for (l = info->windows; l; l = l->next) meta_window_actor_invalidate_shadow (l->data); } } /** * meta_compositor_new: (skip) * @display: * */ MetaCompositor * meta_compositor_new (MetaDisplay *display) { char *atom_names[] = { "_XROOTPMAP_ID", "_NET_WM_WINDOW_OPACITY", }; Atom atoms[G_N_ELEMENTS(atom_names)]; MetaCompositor *compositor; Display *xdisplay = meta_display_get_xdisplay (display); if (!composite_at_least_version (display, 0, 3)) return NULL; compositor = g_new0 (MetaCompositor, 1); compositor->display = display; if (g_getenv("META_DISABLE_MIPMAPS")) compositor->no_mipmaps = TRUE; meta_verbose ("Creating %d atoms\n", (int) G_N_ELEMENTS (atom_names)); XInternAtoms (xdisplay, atom_names, G_N_ELEMENTS (atom_names), False, atoms); g_signal_connect (meta_shadow_factory_get_default (), "changed", G_CALLBACK (on_shadow_factory_changed), compositor); compositor->atom_x_root_pixmap = atoms[0]; compositor->atom_net_wm_window_opacity = atoms[1]; compositor->repaint_func_id = clutter_threads_add_repaint_func (meta_repaint_func, compositor, NULL); return compositor; } /** * meta_get_overlay_window: (skip) * @screen: a #MetaScreen * */ Window meta_get_overlay_window (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); return info->output; } /** * meta_disable_unredirect_for_screen: * @screen: a #MetaScreen * * Disables unredirection, can be usefull in situations where having * unredirected windows is undesireable like when recording a video. * */ void meta_disable_unredirect_for_screen (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (info != NULL) info->disable_unredirect_count = info->disable_unredirect_count + 1; } /** * meta_enable_unredirect_for_screen: * @screen: a #MetaScreen * * Enables unredirection which reduces the overhead for apps like games. * */ void meta_enable_unredirect_for_screen (MetaScreen *screen) { MetaCompScreen *info = meta_screen_get_compositor_data (screen); if (info != NULL && info->disable_unredirect_count == 0) g_warning ("Called enable_unredirect_for_screen while unredirection is enabled."); if (info != NULL && info->disable_unredirect_count > 0) info->disable_unredirect_count = info->disable_unredirect_count - 1; } #define FLASH_TIME_MS 50 static void flash_out_completed (ClutterTimeline *timeline, gboolean is_finished, gpointer user_data) { ClutterActor *flash = CLUTTER_ACTOR (user_data); clutter_actor_destroy (flash); } void meta_compositor_flash_screen (MetaCompositor *compositor, MetaScreen *screen) { ClutterActor *stage; ClutterActor *flash; ClutterTransition *transition; gfloat width, height; stage = meta_get_stage_for_screen (screen); clutter_actor_get_size (stage, &width, &height); flash = clutter_actor_new (); clutter_actor_set_background_color (flash, CLUTTER_COLOR_Black); clutter_actor_set_size (flash, width, height); clutter_actor_set_opacity (flash, 0); clutter_actor_add_child (stage, flash); clutter_actor_save_easing_state (flash); clutter_actor_set_easing_mode (flash, CLUTTER_EASE_IN_QUAD); clutter_actor_set_easing_duration (flash, FLASH_TIME_MS); clutter_actor_set_opacity (flash, 192); transition = clutter_actor_get_transition (flash, "opacity"); clutter_timeline_set_auto_reverse (CLUTTER_TIMELINE (transition), TRUE); clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), 2); g_signal_connect (transition, "stopped", G_CALLBACK (flash_out_completed), flash); clutter_actor_restore_easing_state (flash); } /** * meta_compositor_monotonic_time_to_server_time: * @display: a #MetaDisplay * @monotonic_time: time in the units of g_get_monotonic_time() * * _NET_WM_FRAME_DRAWN and _NET_WM_FRAME_TIMINGS messages represent time * as a "high resolution server time" - this is the server time interpolated * to microsecond resolution. The advantage of this time representation * is that if X server is running on the same computer as a client, and * the Xserver uses 'clock_gettime(CLOCK_MONOTONIC, ...)' for the server * time, the client can detect this, and all such clients will share a * a time representation with high accuracy. If there is not a common * time source, then the time synchronization will be less accurate. */ gint64 meta_compositor_monotonic_time_to_server_time (MetaDisplay *display, gint64 monotonic_time) { MetaCompositor *compositor = display->compositor; if (compositor->server_time_query_time == 0 || (!compositor->server_time_is_monotonic_time && monotonic_time > compositor->server_time_query_time + 10*1000*1000)) /* 10 seconds */ { guint32 server_time = meta_display_get_current_time_roundtrip (display); gint64 server_time_usec = (gint64)server_time * 1000; gint64 current_monotonic_time = g_get_monotonic_time (); compositor->server_time_query_time = current_monotonic_time; /* If the server time is within a second of the monotonic time, * we assume that they are identical. This seems like a big margin, * but we want to be as robust as possible even if the system * is under load and our processing of the server response is * delayed. */ if (server_time_usec > current_monotonic_time - 1000*1000 && server_time_usec < current_monotonic_time + 1000*1000) compositor->server_time_is_monotonic_time = TRUE; compositor->server_time_offset = server_time_usec - current_monotonic_time; } if (compositor->server_time_is_monotonic_time) return monotonic_time; else return monotonic_time + compositor->server_time_offset; }