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5e9621ed80
mutter/src/compositor/compositor.c
Jasper St. Pierre 5e9621ed80 compositor: Spoof events on the guard window 
This allows events generated for the guard window to be picked up
by Clutter as if they were events for the mutter stage.

https://bugzilla.gnome.org/show_bug.cgi?id=681540
2013-02-17 15:43:38 -05:00

1600 lines
48 KiB
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include <config.h>
#include <clutter/x11/clutter-x11.h>
#include "core.h"
#include <meta/screen.h>
#include <meta/errors.h>
#include <meta/window.h>
#include "compositor-private.h"
#include <meta/compositor-mutter.h>
#include "xprops.h"
#include <meta/prefs.h>
#include <meta/main.h>
#include <meta/meta-shadow-factory.h>
#include "meta-window-actor-private.h"
#include "meta-window-group.h"
#include "meta-background-actor-private.h"
#include "window-private.h" /* to check window->hidden */
#include "display-private.h" /* for meta_display_lookup_x_window() */
#include <X11/extensions/shape.h>
#include <X11/extensions/Xcomposite.h>
/* #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_damage (window_actor, event);
}
static void
process_property_notify (MetaCompositor *compositor,
XPropertyEvent *event,
MetaWindow *window)
{
MetaWindowActor *window_actor;
if (event->atom == compositor->atom_x_root_pixmap)
{
GSList *l;
for (l = meta_display_get_screens (compositor->display); l; l = l->next)
{
MetaScreen *screen = l->data;
if (event->window == meta_screen_get_xroot (screen))
{
meta_background_actor_update (screen);
return;
}
}
}
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_overlay_group_for_screen:
* @screen: a #MetaScreen
*
* Returns: (transfer none): The overlay group corresponding to @screen
*/
ClutterActor *
meta_get_overlay_group_for_screen (MetaScreen *screen)
{
MetaCompScreen *info = meta_screen_get_compositor_data (screen);
if (!info)
return NULL;
return info->overlay_group;
}
/**
* 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_background_actor_for_screen:
* @screen: a #MetaScreen
*
* Gets the actor that draws the root window background under the windows.
* The root window background automatically tracks the image or color set
* by the environment.
*
* Returns: (transfer none): The background actor corresponding to @screen
*/
ClutterActor *
meta_get_background_actor_for_screen (MetaScreen *screen)
{
MetaCompScreen *info = meta_screen_get_compositor_data (screen);
if (!info)
return NULL;
return info->background_actor;
}
/**
* 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)
{
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);
}
gboolean
meta_begin_modal_for_plugin (MetaScreen *screen,
MetaPlugin *plugin,
Window grab_window,
Cursor cursor,
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;
gboolean pointer_grabbed = FALSE;
gboolean keyboard_grabbed = FALSE;
int result;
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 (ClutterActor *stage,
MetaCompScreen *info)
{
GList *l;
for (l = info->windows; l; l = l->next)
meta_window_actor_post_paint (l->data);
}
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);
int screen_number = meta_screen_get_screen_number (screen);
Window xroot = meta_screen_get_xroot (screen);
Window xwin;
gint width, height;
guint n_retries;
guint max_retries;
/* Check if the screen is already managed */
if (meta_screen_get_compositor_data (screen))
return;
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);
}
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.
*/
info->pending_input_region = XFixesCreateRegion (xdisplay, NULL, 0);
info->screen = screen;
meta_screen_set_compositor_data (screen, info);
info->output = None;
info->windows = NULL;
meta_screen_set_cm_selection (screen);
info->stage = clutter_stage_new ();
g_signal_connect_after (info->stage, "paint",
G_CALLBACK (after_stage_paint), info);
clutter_stage_set_sync_delay (CLUTTER_STAGE (info->stage), META_SYNC_DELAY);
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);
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);
}
info->window_group = meta_window_group_new (screen);
info->top_window_group = meta_window_group_new (screen);
info->background_actor = meta_background_actor_new_for_screen (screen);
clutter_actor_set_reactive (info->background_actor, TRUE);
info->overlay_group = clutter_group_new ();
clutter_container_add (CLUTTER_CONTAINER (info->window_group),
info->background_actor,
NULL);
clutter_container_add (CLUTTER_CONTAINER (info->stage),
info->window_group,
info->top_window_group,
info->overlay_group,
NULL);
info->plugin_mgr = meta_plugin_manager_new (screen);
/*
* 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;
}
clutter_actor_show (info->overlay_group);
clutter_actor_show (info->stage);
}
void
meta_compositor_unmanage_screen (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);
/* 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;
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_shape_changed (MetaCompositor *compositor,
MetaWindow *window)
{
MetaWindowActor *window_actor;
window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
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)
*
*/
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 (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 (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 *tmp;
GList *old;
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_container_get_children (CLUTTER_CONTAINER (info->window_group));
reordered = FALSE;
old = children;
/* 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.)
*/
/* Of the actors we know, the bottom actor should be the background actor */
while (old && old->data != info->background_actor && !META_IS_WINDOW_ACTOR (old->data))
old = old->next;
if (old == NULL || old->data != info->background_actor)
{
reordered = TRUE;
goto done_with_check;
}
/* Then the window actors should follow in sequence */
old = old->next;
for (tmp = info->windows; tmp != NULL; tmp = tmp->next)
{
while (old && !META_IS_WINDOW_ACTOR (old->data))
old = old->next;
/* old == NULL: someone reparented a window out of the window group,
* order undefined, always restack */
if (old == NULL || old->data != tmp->data)
{
reordered = TRUE;
goto done_with_check;
}
old = old->next;
}
done_with_check:
g_list_free (children);
if (!reordered)
return;
for (tmp = g_list_last (info->windows); tmp != NULL; tmp = tmp->prev)
{
MetaWindowActor *window_actor = tmp->data;
clutter_actor_lower_bottom (CLUTTER_ACTOR (window_actor));
}
clutter_actor_lower_bottom (info->background_actor);
}
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);
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_background_actor_screen_size_changed (screen);
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;
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)
*
*/
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)
*
*/
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 = MAX(0, info->disable_unredirect_count - 1);
}
#define FLASH_TIME_MS 50
static void
flash_out_completed (ClutterAnimation *animation,
ClutterActor *flash)
{
clutter_actor_destroy (flash);
}
static void
flash_in_completed (ClutterAnimation *animation,
ClutterActor *flash)
{
clutter_actor_animate (flash, CLUTTER_EASE_IN_QUAD,
FLASH_TIME_MS,
"opacity", 0,
"signal-after::completed", flash_out_completed, flash,
NULL);
}
void
meta_compositor_flash_screen (MetaCompositor *compositor,
MetaScreen *screen)
{
ClutterActor *stage;
ClutterActor *flash;
ClutterColor black = { 0, 0, 0, 255 };
gfloat width, height;
stage = meta_get_stage_for_screen (screen);
clutter_actor_get_size (stage, &width, &height);
flash = clutter_rectangle_new_with_color (&black);
clutter_actor_set_size (flash, width, height);
clutter_actor_set_opacity (flash, 0);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), flash);
clutter_actor_animate (flash, CLUTTER_EASE_OUT_QUAD,
FLASH_TIME_MS,
"opacity", 192,
"signal-after::completed", flash_in_completed, flash,
NULL);
}
/**
* 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;
}
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