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mutter/clutter/mir/clutter-event-mir.c
Marco Trevisan (Treviño) 77db999339 clutter: add Mir windowing/input backend 
Added support for Mir, now clutter can natively draw on MirSurfaces.
This depends on latest cogl git.

Run your clutter apps using CLUTTER_BACKEND=mir

Signed-off-by: Emmanuele Bassi <ebassi@gnome.org>
2015-02-21 00:46:17 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2014 Canonical Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Marco Trevisan <marco.trevisan@canonical.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-mir.h"
#include "clutter-private.h"
#include "clutter-event-private.h"
#include "clutter-stage-mir.h"
#include "clutter-stage-private.h"
#include "clutter-backend-mir-priv.h"
#include "clutter-device-manager-private.h"
#include "evdev/clutter-xkb-utils.h"
#include "clutter-event-mir.h"
#define NANO_TO_MILLI(x) ((x) / 1000000)
/* Using the clutter threads lock would cause a dead-lock when resizing */
static GMutex mir_event_lock;
static gboolean
clutter_event_source_mir_check (GSource *source)
{
gboolean retval;
g_mutex_lock (&mir_event_lock);
retval = clutter_events_pending ();
g_mutex_unlock (&mir_event_lock);
return retval;
}
static gboolean
clutter_event_source_mir_prepare (GSource *source, gint *timeout)
{
*timeout = -1;
return clutter_event_source_mir_check (source);
}
static gboolean
clutter_event_source_mir_dispatch (GSource *source,
GSourceFunc callback,
gpointer data)
{
ClutterEvent *event;
g_mutex_lock (&mir_event_lock);
_clutter_threads_acquire_lock ();
event = clutter_event_get ();
if (event)
{
/* forward the event into clutter for emission etc. */
_clutter_stage_queue_event (event->any.stage, event, FALSE);
}
_clutter_threads_release_lock ();
g_mutex_unlock (&mir_event_lock);
return TRUE;
}
static void
clutter_event_source_mir_finalize (GSource *source)
{
g_mutex_clear (&mir_event_lock);
}
static GSourceFuncs clutter_event_source_mir_funcs = {
clutter_event_source_mir_prepare,
clutter_event_source_mir_check,
clutter_event_source_mir_dispatch,
clutter_event_source_mir_finalize
};
GSource *
_clutter_event_source_mir_new (void)
{
GSource *source;
source = g_source_new (&clutter_event_source_mir_funcs, sizeof (GSource));
g_mutex_init (&mir_event_lock);
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
g_source_attach (source, NULL);
return source;
}
static ClutterModifierType
translate_mir_modifier (unsigned int key_modifiers, MirMotionButton button_state)
{
ClutterModifierType clutter_modifiers = 0;
if (key_modifiers == mir_key_modifier_none && button_state == 0)
return clutter_modifiers;
if (key_modifiers & mir_key_modifier_alt)
clutter_modifiers |= CLUTTER_MOD1_MASK;
if (key_modifiers & mir_key_modifier_shift)
clutter_modifiers |= CLUTTER_SHIFT_MASK;
if (key_modifiers & mir_key_modifier_ctrl)
clutter_modifiers |= CLUTTER_CONTROL_MASK;
if (key_modifiers & mir_key_modifier_meta)
clutter_modifiers |= CLUTTER_META_MASK;
if (key_modifiers & mir_key_modifier_caps_lock)
clutter_modifiers |= CLUTTER_LOCK_MASK;
if (button_state & mir_motion_button_primary)
clutter_modifiers |= CLUTTER_BUTTON1_MASK;
if (button_state & mir_motion_button_secondary)
clutter_modifiers |= CLUTTER_BUTTON3_MASK;
if (button_state & mir_motion_button_tertiary)
clutter_modifiers |= CLUTTER_BUTTON2_MASK;
return clutter_modifiers;
}
static gunichar
get_unicode_value (int32_t key_code)
{
gunichar unicode = '\0';
char text[8];
int size;
size = xkb_keysym_to_utf8 (key_code, text, sizeof (text));
if (size > 0)
{
unicode = g_utf8_get_char_validated (text, size);
if (unicode == -1 || unicode == -2)
unicode = '\0';
}
return unicode;
}
void
_clutter_mir_handle_event (ClutterBackend *backend,
MirSurface *surface,
MirEvent *mir_event)
{
ClutterStageManager *stage_manager;
ClutterInputDevice *device = NULL;
ClutterStage *stage = NULL;
ClutterEvent *event = NULL;
ClutterModifierType modifiers;
MirMotionButton button_state;
MirMotionPointer *pointer;
const GSList *l;
stage_manager = clutter_stage_manager_get_default ();
for (l = clutter_stage_manager_peek_stages (stage_manager); l; l = l->next)
{
ClutterStage* tmp_stage = l->data;
if (CLUTTER_IS_STAGE (tmp_stage) &&
clutter_mir_stage_get_mir_surface (tmp_stage) == surface)
{
stage = tmp_stage;
break;
}
}
if (!stage)
return;
g_mutex_lock (&mir_event_lock);
button_state = CLUTTER_STAGE_MIR (stage)->button_state;
switch (mir_event->type)
{
case mir_event_type_key:
if (mir_event->key.action == mir_key_action_multiple)
break;
device = clutter_device_manager_get_core_device (backend->device_manager,
CLUTTER_KEYBOARD_DEVICE);
event = clutter_event_new (mir_event->key.action == mir_key_action_down ?
CLUTTER_KEY_PRESS : CLUTTER_KEY_RELEASE);
modifiers = translate_mir_modifier (mir_event->key.modifiers, button_state);
event->key.time = NANO_TO_MILLI (mir_event->key.event_time);
event->key.modifier_state = modifiers;
event->key.keyval = mir_event->key.key_code;
event->key.hardware_keycode = mir_event->key.scan_code + 8;
event->key.unicode_value = get_unicode_value (mir_event->key.key_code);
break;
case mir_event_type_motion:
pointer = mir_event->motion.pointer_coordinates;
device = clutter_device_manager_get_core_device (backend->device_manager,
CLUTTER_POINTER_DEVICE);
/* We need to send an ENTER event again if the stage is not focused anymore */
if (mir_event->motion.action != mir_motion_action_hover_enter &&
mir_event->motion.action != mir_motion_action_hover_exit &&
!_clutter_input_device_get_stage (device))
{
ClutterEvent *new_event = clutter_event_new (CLUTTER_ENTER);
modifiers = translate_mir_modifier (mir_event->motion.modifiers,
button_state);
clutter_event_set_time (new_event, NANO_TO_MILLI (mir_event->motion.event_time));
clutter_event_set_state (new_event, modifiers);
clutter_event_set_coords (new_event, pointer->x, pointer->y);
_clutter_input_device_set_stage (device, stage);
clutter_event_set_stage (new_event, stage);
clutter_event_set_device (new_event, device);
clutter_event_set_source_device (new_event, device);
_clutter_event_push (new_event, FALSE);
}
switch (mir_event->motion.action)
{
case mir_motion_action_down:
case mir_motion_action_pointer_down:
case mir_motion_action_up:
case mir_motion_action_pointer_up:
event = clutter_event_new ((mir_event->motion.action ==
mir_motion_action_down ||
mir_event->motion.action ==
mir_motion_action_pointer_down) ?
CLUTTER_BUTTON_PRESS :
CLUTTER_BUTTON_RELEASE);
event->button.button = 1;
event->button.click_count = 1;
button_state ^= mir_event->motion.button_state;
if (button_state == 0 || (button_state & mir_motion_button_primary))
event->button.button = 1;
else if (button_state & mir_motion_button_secondary)
event->button.button = 3;
else if (button_state & mir_motion_button_tertiary)
event->button.button = 2;
else if (button_state & mir_motion_button_back)
event->button.button = 8;
else if (button_state & mir_motion_button_forward)
event->button.button = 9;
button_state = mir_event->motion.button_state;
CLUTTER_STAGE_MIR (stage)->button_state = button_state;
break;
case mir_motion_action_scroll:
event = clutter_event_new (CLUTTER_SCROLL);
if (ABS (pointer->hscroll) == 1 && pointer->vscroll == 0)
{
clutter_event_set_scroll_direction (event, pointer->hscroll < 0 ?
CLUTTER_SCROLL_LEFT :
CLUTTER_SCROLL_RIGHT);
}
else if (ABS (pointer->vscroll) == 1 && pointer->hscroll == 0)
{
clutter_event_set_scroll_direction (event, pointer->vscroll < 0 ?
CLUTTER_SCROLL_DOWN :
CLUTTER_SCROLL_UP);
}
else
{
clutter_event_set_scroll_delta (event, -pointer->hscroll, -pointer->vscroll);
}
break;
case mir_motion_action_move:
case mir_motion_action_hover_move:
event = clutter_event_new (CLUTTER_MOTION);
break;
case mir_motion_action_hover_enter:
event = clutter_event_new (CLUTTER_ENTER);
_clutter_input_device_set_stage (device, stage);
break;
case mir_motion_action_hover_exit:
event = clutter_event_new (CLUTTER_LEAVE);
_clutter_input_device_set_stage (device, NULL);
break;
}
if (event)
{
modifiers = translate_mir_modifier (mir_event->motion.modifiers,
button_state);
clutter_event_set_time (event, NANO_TO_MILLI (mir_event->motion.event_time));
clutter_event_set_state (event, modifiers);
clutter_event_set_coords (event, pointer->x, pointer->y);
}
break;
case mir_event_type_surface:
switch (mir_event->surface.attrib)
{
case mir_surface_attrib_state:
if (mir_event->surface.value == mir_surface_state_fullscreen)
{
_clutter_stage_update_state (stage,
0,
CLUTTER_STAGE_STATE_FULLSCREEN);
}
else
{
_clutter_stage_update_state (stage,
CLUTTER_STAGE_STATE_FULLSCREEN,
0);
}
break;
case mir_surface_attrib_focus:
if (mir_event->surface.value == mir_surface_focused)
{
_clutter_stage_update_state (stage,
0,
CLUTTER_STAGE_STATE_ACTIVATED);
}
else /* if (mir_event->surface.value == mir_surface_unfocused) */
{
_clutter_stage_update_state (stage,
CLUTTER_STAGE_STATE_ACTIVATED,
0);
}
break;
default:
break;
}
break;
case mir_event_type_close_surface:
event = clutter_event_new (CLUTTER_DESTROY_NOTIFY);
break;
default:
break;
}
if (event)
{
clutter_event_set_stage (event, stage);
clutter_event_set_device (event, device);
clutter_event_set_source_device (event, device);
_clutter_event_push (event, FALSE);
}
g_mutex_unlock (&mir_event_lock);
if (event)
g_main_context_wakeup (NULL);
}
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