gtk2/gdk/x11/gdkdevice-core-x11.c

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
*
* 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
2012-02-27 13:01:10 +00:00
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
#include "config.h"
#include "gdkx11device-core.h"
#include "gdkdeviceprivate.h"
#include "gdkinternals.h"
#include "gdkwindow.h"
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#include "gdkprivate-x11.h"
#include "gdkasync.h"
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#include <math.h>
/* for the use of round() */
#include "fallback-c89.c"
struct _GdkX11DeviceCore
{
GdkDevice parent_instance;
};
struct _GdkX11DeviceCoreClass
{
GdkDeviceClass parent_class;
};
static gboolean gdk_x11_device_core_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
gint *n_events);
static void gdk_x11_device_core_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask);
static void gdk_x11_device_core_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor);
static void gdk_x11_device_core_warp (GdkDevice *device,
GdkScreen *screen,
gdouble x,
gdouble y);
static void gdk_x11_device_core_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gdouble *root_x,
gdouble *root_y,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask);
static GdkGrabStatus gdk_x11_device_core_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_);
static void gdk_x11_device_core_ungrab (GdkDevice *device,
guint32 time_);
static GdkWindow * gdk_x11_device_core_window_at_position (GdkDevice *device,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask,
gboolean get_toplevel);
static void gdk_x11_device_core_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask);
G_DEFINE_TYPE (GdkX11DeviceCore, gdk_x11_device_core, GDK_TYPE_DEVICE)
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static void
gdk_x11_device_core_class_init (GdkX11DeviceCoreClass *klass)
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{
GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
device_class->get_history = gdk_x11_device_core_get_history;
device_class->get_state = gdk_x11_device_core_get_state;
device_class->set_window_cursor = gdk_x11_device_core_set_window_cursor;
device_class->warp = gdk_x11_device_core_warp;
device_class->query_state = gdk_x11_device_core_query_state;
device_class->grab = gdk_x11_device_core_grab;
device_class->ungrab = gdk_x11_device_core_ungrab;
device_class->window_at_position = gdk_x11_device_core_window_at_position;
device_class->select_window_events = gdk_x11_device_core_select_window_events;
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}
static void
gdk_x11_device_core_init (GdkX11DeviceCore *device_core)
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{
GdkDevice *device;
device = GDK_DEVICE (device_core);
_gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_X, 0, 0, 1);
_gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_Y, 0, 0, 1);
}
static gboolean
impl_coord_in_window (GdkWindow *window,
int impl_x,
int impl_y)
{
if (impl_x < window->abs_x ||
impl_x >= window->abs_x + window->width)
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return FALSE;
if (impl_y < window->abs_y ||
impl_y >= window->abs_y + window->height)
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return FALSE;
return TRUE;
}
static gboolean
gdk_x11_device_core_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
gint *n_events)
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{
XTimeCoord *xcoords;
GdkTimeCoord **coords;
GdkWindow *impl_window;
GdkWindowImplX11 *impl;
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int tmp_n_events;
int i, j;
impl_window = _gdk_window_get_impl_window (window);
impl = GDK_WINDOW_IMPL_X11 (impl_window->impl);
xcoords = XGetMotionEvents (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (impl_window),
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start, stop, &tmp_n_events);
if (!xcoords)
return FALSE;
coords = _gdk_device_allocate_history (device, tmp_n_events);
for (i = 0, j = 0; i < tmp_n_events; i++)
{
if (impl_coord_in_window (window,
xcoords[i].x / impl->window_scale,
xcoords[i].y / impl->window_scale))
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{
coords[j]->time = xcoords[i].time;
coords[j]->axes[0] = (double)xcoords[i].x / impl->window_scale - window->abs_x;
coords[j]->axes[1] = (double)xcoords[i].y / impl->window_scale - window->abs_y;
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j++;
}
}
XFree (xcoords);
/* free the events we allocated too much */
for (i = j; i < tmp_n_events; i++)
{
g_free (coords[i]);
coords[i] = NULL;
}
tmp_n_events = j;
if (tmp_n_events == 0)
{
gdk_device_free_history (coords, tmp_n_events);
return FALSE;
}
if (n_events)
*n_events = tmp_n_events;
if (events)
*events = coords;
else if (coords)
gdk_device_free_history (coords, tmp_n_events);
return TRUE;
}
static void
gdk_x11_device_core_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask)
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{
gdouble x, y;
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gdk_window_get_device_position_double (window, device, &x, &y, mask);
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if (axes)
{
axes[0] = x;
axes[1] = y;
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}
}
static void
gdk_x11_device_core_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor)
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{
Cursor xcursor;
if (!cursor)
xcursor = None;
else
xcursor = gdk_x11_cursor_get_xcursor (cursor);
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XDefineCursor (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
xcursor);
}
static void
gdk_x11_device_core_warp (GdkDevice *device,
GdkScreen *screen,
gdouble x,
gdouble y)
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{
Display *xdisplay;
Window dest;
xdisplay = GDK_DISPLAY_XDISPLAY (gdk_device_get_display (device));
dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
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XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0,
round (x * GDK_X11_SCREEN (screen)->window_scale),
round (y * GDK_X11_SCREEN (screen)->window_scale));
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}
static void
gdk_x11_device_core_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gdouble *root_x,
gdouble *root_y,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask)
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{
GdkWindowImplX11 *impl = GDK_WINDOW_IMPL_X11 (window->impl);
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GdkDisplay *display;
GdkScreen *default_screen;
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Window xroot_window, xchild_window;
int xroot_x, xroot_y, xwin_x, xwin_y;
unsigned int xmask;
display = gdk_window_get_display (window);
default_screen = gdk_display_get_default_screen (display);
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if (!GDK_X11_DISPLAY (display)->trusted_client ||
!XQueryPointer (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&xmask))
{
XSetWindowAttributes attributes;
Display *xdisplay;
Window xwindow, w;
/* FIXME: untrusted clients not multidevice-safe */
xdisplay = GDK_SCREEN_XDISPLAY (default_screen);
xwindow = GDK_SCREEN_XROOTWIN (default_screen);
w = XCreateWindow (xdisplay, xwindow, 0, 0, 1, 1, 0,
CopyFromParent, InputOnly, CopyFromParent,
0, &attributes);
XQueryPointer (xdisplay, w,
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&xmask);
XDestroyWindow (xdisplay, w);
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}
if (root_window)
*root_window = gdk_x11_window_lookup_for_display (display, xroot_window);
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if (child_window)
*child_window = gdk_x11_window_lookup_for_display (display, xchild_window);
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if (root_x)
*root_x = (double)xroot_x / impl->window_scale;
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if (root_y)
*root_y = (double)xroot_y / impl->window_scale;
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if (win_x)
*win_x = (double)xwin_x / impl->window_scale;
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if (win_y)
*win_y = (double)xwin_y / impl->window_scale;
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if (mask)
*mask = xmask;
}
static GdkGrabStatus
gdk_x11_device_core_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_)
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{
GdkDisplay *display;
Window xwindow, xconfine_to;
gint status;
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display = gdk_device_get_display (device);
xwindow = GDK_WINDOW_XID (window);
if (confine_to)
confine_to = _gdk_window_get_impl_window (confine_to);
if (!confine_to || GDK_WINDOW_DESTROYED (confine_to))
xconfine_to = None;
else
xconfine_to = GDK_WINDOW_XID (confine_to);
#ifdef G_ENABLE_DEBUG
if (GDK_DEBUG_CHECK (NOGRABS))
status = GrabSuccess;
else
#endif
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
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{
/* Device is a keyboard */
status = XGrabKeyboard (GDK_DISPLAY_XDISPLAY (display),
xwindow,
owner_events,
GrabModeAsync, GrabModeAsync,
time_);
}
else
{
Cursor xcursor;
guint xevent_mask;
gint i;
/* Device is a pointer */
if (!cursor)
xcursor = None;
else
{
_gdk_x11_cursor_update_theme (cursor);
xcursor = gdk_x11_cursor_get_xcursor (cursor);
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}
xevent_mask = 0;
for (i = 0; i < _gdk_x11_event_mask_table_size; i++)
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{
if (event_mask & (1 << (i + 1)))
xevent_mask |= _gdk_x11_event_mask_table[i];
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}
/* We don't want to set a native motion hint mask, as we're emulating motion
* hints. If we set a native one we just wouldn't get any events.
*/
xevent_mask &= ~PointerMotionHintMask;
status = XGrabPointer (GDK_DISPLAY_XDISPLAY (display),
xwindow,
owner_events,
xevent_mask,
GrabModeAsync, GrabModeAsync,
xconfine_to,
xcursor,
time_);
}
_gdk_x11_display_update_grab_info (display, device, status);
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return _gdk_x11_convert_grab_status (status);
}
static void
gdk_x11_device_core_ungrab (GdkDevice *device,
guint32 time_)
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{
GdkDisplay *display;
gulong serial;
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display = gdk_device_get_display (device);
serial = NextRequest (GDK_DISPLAY_XDISPLAY (display));
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if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
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XUngrabKeyboard (GDK_DISPLAY_XDISPLAY (display), time_);
else
XUngrabPointer (GDK_DISPLAY_XDISPLAY (display), time_);
_gdk_x11_display_update_grab_info_ungrab (display, device, time_, serial);
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}
static GdkWindow *
gdk_x11_device_core_window_at_position (GdkDevice *device,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask,
gboolean get_toplevel)
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{
GdkWindowImplX11 *impl;
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GdkDisplay *display;
GdkScreen *screen;
Display *xdisplay;
GdkWindow *window;
Window xwindow, root, child, last;
int xroot_x, xroot_y, xwin_x, xwin_y;
unsigned int xmask;
last = None;
display = gdk_device_get_display (device);
screen = gdk_display_get_default_screen (display);
/* This function really only works if the mouse pointer is held still
* during its operation. If it moves from one leaf window to another
* than we'll end up with inaccurate values for win_x, win_y
* and the result.
*/
gdk_x11_display_grab (display);
xdisplay = GDK_SCREEN_XDISPLAY (screen);
xwindow = GDK_SCREEN_XROOTWIN (screen);
if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
{
XQueryPointer (xdisplay, xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&xmask);
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if (root == xwindow)
xwindow = child;
else
xwindow = root;
}
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else
{
gint width, height;
GList *toplevels, *list;
Window pointer_window;
int rootx = -1, rooty = -1;
int winx, winy;
/* FIXME: untrusted clients case not multidevice-safe */
pointer_window = None;
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screen = gdk_display_get_default_screen (display);
toplevels = gdk_screen_get_toplevel_windows (screen);
for (list = toplevels; list != NULL; list = list->next)
{
window = GDK_WINDOW (list->data);
impl = GDK_WINDOW_IMPL_X11 (window->impl);
xwindow = GDK_WINDOW_XID (window);
gdk_x11_display_error_trap_push (display);
XQueryPointer (xdisplay, xwindow,
&root, &child,
&rootx, &rooty,
&winx, &winy,
&xmask);
if (gdk_x11_display_error_trap_pop (display))
continue;
if (child != None)
{
pointer_window = child;
break;
}
gdk_window_get_geometry (window, NULL, NULL, &width, &height);
if (winx >= 0 && winy >= 0 && winx < width * impl->window_scale && winy < height * impl->window_scale)
{
/* A childless toplevel, or below another window? */
XSetWindowAttributes attributes;
Window w;
w = XCreateWindow (xdisplay, xwindow, winx, winy, 1, 1, 0,
CopyFromParent, InputOnly, CopyFromParent,
0, &attributes);
XMapWindow (xdisplay, w);
XQueryPointer (xdisplay, xwindow,
&root, &child,
&rootx, &rooty,
&winx, &winy,
&xmask);
XDestroyWindow (xdisplay, w);
if (child == w)
{
pointer_window = xwindow;
break;
}
}
}
g_list_free (toplevels);
xwindow = pointer_window;
}
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while (xwindow)
{
last = xwindow;
gdk_x11_display_error_trap_push (display);
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XQueryPointer (xdisplay, xwindow,
&root, &xwindow,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&xmask);
if (gdk_x11_display_error_trap_pop (display))
break;
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if (get_toplevel && last != root &&
(window = gdk_x11_window_lookup_for_display (display, last)) != NULL &&
window->window_type != GDK_WINDOW_FOREIGN)
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{
xwindow = last;
break;
}
}
gdk_x11_display_ungrab (display);
window = gdk_x11_window_lookup_for_display (display, last);
impl = NULL;
if (window)
impl = GDK_WINDOW_IMPL_X11 (window->impl);
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if (win_x)
*win_x = (window) ? (double)xwin_x / impl->window_scale : -1;
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if (win_y)
*win_y = (window) ? (double)xwin_y / impl->window_scale : -1;
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if (mask)
*mask = xmask;
return window;
}
static void
gdk_x11_device_core_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask)
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{
GdkEventMask filter_mask, window_mask;
guint xmask = 0;
gint i;
window_mask = gdk_window_get_events (window);
filter_mask = GDK_POINTER_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK
| GDK_BUTTON_MOTION_MASK
| GDK_BUTTON1_MOTION_MASK
| GDK_BUTTON2_MOTION_MASK
| GDK_BUTTON3_MOTION_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_KEY_PRESS_MASK
| GDK_KEY_RELEASE_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK
| GDK_FOCUS_CHANGE_MASK
| GDK_PROXIMITY_IN_MASK
| GDK_PROXIMITY_OUT_MASK
| GDK_SCROLL_MASK;
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/* Filter out non-device events */
event_mask &= filter_mask;
/* Unset device events on window mask */
window_mask &= ~filter_mask;
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/* Combine masks */
event_mask |= window_mask;
for (i = 0; i < _gdk_x11_event_mask_table_size; i++)
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{
if (event_mask & (1 << (i + 1)))
xmask |= _gdk_x11_event_mask_table[i];
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}
if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
xmask |= StructureNotifyMask | PropertyChangeMask;
XSelectInput (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
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xmask);
}