From 38a0aecf61f4126ed94dffc8c2763c4082200233 Mon Sep 17 00:00:00 2001 From: Carlos Garnacho Date: Wed, 8 Jun 2011 10:18:35 +0200 Subject: [PATCH] core: Add helper code to handle input events These will be used with every input event out there so they're dealt with uniformly. --- src/Makefile.am | 2 + src/core/input-events.c | 497 ++++++++++++++++++++++++++++++++++++++++ src/core/input-events.h | 64 ++++++ 3 files changed, 563 insertions(+) create mode 100644 src/core/input-events.c create mode 100644 src/core/input-events.h diff --git a/src/Makefile.am b/src/Makefile.am index c313e81c8..3bcc141c1 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -97,6 +97,8 @@ libmutter_la_SOURCES = \ meta/group.h \ core/iconcache.c \ core/iconcache.h \ + core/input-events.c \ + core/input-events.h \ core/keybindings.c \ core/keybindings-private.h \ core/main.c \ diff --git a/src/core/input-events.c b/src/core/input-events.c new file mode 100644 index 000000000..fbd9d2ae8 --- /dev/null +++ b/src/core/input-events.c @@ -0,0 +1,497 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ + +/* XEvent utility methods */ + +/* + * Copyright (C) 2011 Carlos Garnacho + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include +#include "input-events.h" +#include + +#ifdef HAVE_XINPUT2 +#include +#endif + +/* Quite a hack: normalizes XI2 events to their + * core event equivalent, so most code is shared + * for both implementations, code handling input + * events should use the helper functions so + * the actual event is treated correctly. + */ +gboolean +meta_input_event_get_type (MetaDisplay *display, + XEvent *ev, + guint *ev_type) +{ + guint type = 0; /* Silence gcc */ + gboolean retval = TRUE; + +#ifdef HAVE_XINPUT2 + if (display->have_xinput2 && + ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + /* NB: GDK event filters already have generic events + * allocated, so no need to do XGetEventData() on our own + */ + xev = (XIEvent *) ev->xcookie.data; + + switch (xev->evtype) + { + case XI_Motion: + type = MotionNotify; + break; + case XI_ButtonPress: + type = ButtonPress; + break; + case XI_ButtonRelease: + type = ButtonRelease; + break; + case XI_KeyPress: + type = KeyPress; + break; + case XI_KeyRelease: + type = KeyRelease; + break; + case XI_FocusIn: + type = FocusIn; + break; + case XI_FocusOut: + type = FocusOut; + break; + case XI_Enter: + type = EnterNotify; + break; + case XI_Leave: + type = LeaveNotify; + break; + default: + retval = FALSE; + break; + } + } + else +#endif /* HAVE_XINPUT2 */ + { + switch (ev->type) + { + case MotionNotify: + case ButtonPress: + case ButtonRelease: + case KeyPress: + case KeyRelease: + case FocusIn: + case FocusOut: + case EnterNotify: + case LeaveNotify: + type = ev->type; + break; + default: + retval = FALSE; + break; + } + } + + if (retval) + { + if (ev_type) + *ev_type = type; + + return TRUE; + } + else + return FALSE; +} + + +Window +meta_input_event_get_window (MetaDisplay *display, + XEvent *ev) +{ +#ifdef HAVE_XINPUT2 + if (ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + g_assert (display->have_xinput2 == TRUE); + + /* GDK event filters already have generic events allocated */ + xev = (XIEvent *) ev->xcookie.data; + + switch (xev->evtype) + { + case XI_Motion: + case XI_ButtonPress: + case XI_ButtonRelease: + case XI_KeyPress: + case XI_KeyRelease: + return ((XIDeviceEvent *) xev)->event; + case XI_FocusIn: + case XI_FocusOut: + case XI_Enter: + case XI_Leave: + return ((XIEnterEvent *) xev)->event; + default: + return None; + } + } + else +#endif /* HAVE_XINPUT2 */ + return ev->xany.window; +} + +Window +meta_input_event_get_root_window (MetaDisplay *display, + XEvent *ev) +{ +#ifdef HAVE_XINPUT2 + if (ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + g_assert (display->have_xinput2 == TRUE); + + xev = (XIEvent *) ev->xcookie.data; + + switch (xev->evtype) + { + case XI_Motion: + case XI_ButtonPress: + case XI_ButtonRelease: + case XI_KeyPress: + case XI_KeyRelease: + return ((XIDeviceEvent *) xev)->root; + case XI_FocusIn: + case XI_FocusOut: + case XI_Enter: + case XI_Leave: + return ((XIEnterEvent *) xev)->root; + default: + break; + } + } + else +#endif /* HAVE_XINPUT2 */ + { + switch (ev->type) + { + case KeyPress: + case KeyRelease: + return ev->xkey.root; + case ButtonPress: + case ButtonRelease: + return ev->xbutton.root; + case EnterNotify: + case LeaveNotify: + return ev->xcrossing.root; + case MotionNotify: + return ev->xbutton.root; + default: + break; + } + } + + return None; +} + +Time +meta_input_event_get_time (MetaDisplay *display, + XEvent *ev) +{ +#ifdef HAVE_XINPUT2 + if (ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + g_assert (display->have_xinput2 == TRUE); + + xev = (XIEvent *) ev->xcookie.data; + + switch (xev->evtype) + { + case XI_Motion: + case XI_ButtonPress: + case XI_ButtonRelease: + case XI_KeyPress: + case XI_KeyRelease: + return ((XIDeviceEvent *) xev)->time; + case XI_FocusIn: + case XI_FocusOut: + case XI_Enter: + case XI_Leave: + return ((XIEnterEvent *) xev)->time; + default: + break; + } + } + else +#endif /* HAVE_XINPUT2 */ + { + switch (ev->type) + { + case KeyPress: + case KeyRelease: + return ev->xkey.time; + case ButtonPress: + case ButtonRelease: + return ev->xbutton.time; + case EnterNotify: + case LeaveNotify: + return ev->xcrossing.time; + case MotionNotify: + return ev->xmotion.time; + default: + break; + } + } + + return CurrentTime; +} + +gboolean +meta_input_event_get_coordinates (MetaDisplay *display, + XEvent *ev, + gdouble *x_ret, + gdouble *y_ret, + gdouble *x_root_ret, + gdouble *y_root_ret) +{ + gdouble x, y, x_root, y_root; + gboolean retval = TRUE; + +#ifdef HAVE_XINPUT2 + if (ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + g_assert (display->have_xinput2 == TRUE); + + xev = (XIEvent *) ev->xcookie.data; + + switch (xev->evtype) + { + case XI_Motion: + case XI_ButtonPress: + case XI_ButtonRelease: + case XI_KeyPress: + case XI_KeyRelease: + { + XIDeviceEvent *event = (XIDeviceEvent *) xev; + + x = event->event_x; + y = event->event_y; + x_root = event->root_x; + y_root = event->root_y; + } + + break; + case XI_FocusIn: + case XI_FocusOut: + case XI_Enter: + case XI_Leave: + { + XIEnterEvent *event = (XIEnterEvent *) xev; + + x = event->event_x; + y = event->event_y; + x_root = event->root_x; + y_root = event->root_y; + } + + break; + default: + retval = FALSE; + break; + } + } + else +#endif /* HAVE_XINPUT2 */ + { + switch (ev->type) + { + case KeyPress: + case KeyRelease: + x = ev->xkey.x; + y = ev->xkey.y; + x_root = ev->xkey.x_root; + y_root = ev->xkey.y_root; + break; + case ButtonPress: + case ButtonRelease: + x = ev->xbutton.x; + y = ev->xbutton.y; + x_root = ev->xbutton.x_root; + y_root = ev->xbutton.y_root; + break; + case EnterNotify: + case LeaveNotify: + x = ev->xcrossing.x; + y = ev->xcrossing.y; + x_root = ev->xcrossing.x_root; + y_root = ev->xcrossing.y_root; + break; + case MotionNotify: + x = ev->xmotion.x; + y = ev->xmotion.y; + x_root = ev->xmotion.x_root; + y_root = ev->xmotion.y_root; + break; + default: + retval = FALSE; + break; + } + } + + if (retval) + { + if (x_ret) + *x_ret = x; + + if (y_ret) + *y_ret = y; + + if (x_root_ret) + *x_root_ret = x_root; + + if (y_root_ret) + *y_root_ret = y_root; + } + + return retval; +} + +gboolean +meta_input_event_get_state (MetaDisplay *display, + XEvent *ev, + guint *state) +{ + gboolean retval = TRUE; + guint s; + +#ifdef HAVE_XINPUT2 + if (ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + g_assert (display->have_xinput2 == TRUE); + + xev = (XIEvent *) ev->xcookie.data; + + switch (xev->evtype) + { + case XI_Motion: + case XI_ButtonPress: + case XI_ButtonRelease: + case XI_KeyPress: + case XI_KeyRelease: + s = ((XIDeviceEvent *) xev)->mods.effective; + break; + case XI_FocusIn: + case XI_FocusOut: + case XI_Enter: + case XI_Leave: + s = ((XIDeviceEvent *) xev)->mods.effective; + break; + default: + retval = FALSE; + break; + } + } + else +#endif /* HAVE_XINPUT2 */ + { + switch (ev->type) + { + case KeyPress: + case KeyRelease: + s = ev->xkey.state; + break; + case ButtonPress: + case ButtonRelease: + s = ev->xbutton.state; + break; + case EnterNotify: + case LeaveNotify: + s = ev->xcrossing.state; + break; + case MotionNotify: + s = ev->xmotion.state; + break; + default: + retval = FALSE; + break; + } + } + + if (retval && state) + *state = s; + + return retval; +} + +gboolean +meta_input_event_get_keycode (MetaDisplay *display, + XEvent *ev, + guint *keycode) +{ +#ifdef HAVE_XINPUT2 + if (ev->type == GenericEvent && + ev->xcookie.extension == display->xinput2_opcode) + { + XIEvent *xev; + + g_assert (display->have_xinput2 == TRUE); + + xev = (XIEvent *) ev->xcookie.data; + + if (xev->evtype == XI_KeyPress || + xev->evtype == XI_KeyRelease) + { + if (keycode) + { + /* The detail field contains keycode for key events */ + *keycode = ((XIDeviceEvent *) xev)->detail; + } + + return TRUE; + } + } + else +#endif /* HAVE_XINPUT2 */ + { + if (ev->type == KeyPress || + ev->type == KeyRelease) + { + if (keycode) + *keycode = ev->xkey.keycode; + + return TRUE; + } + } + + return FALSE; +} diff --git a/src/core/input-events.h b/src/core/input-events.h new file mode 100644 index 000000000..ea2c12e38 --- /dev/null +++ b/src/core/input-events.h @@ -0,0 +1,64 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ + +/** + * \file event.h Utility functions for handling events + * + * Handling events. + * This file contains helper methods to handle events, specially + * input events, which can be either core or XInput2. + */ + +/* + * Copyright (C) 2011 Carlos Garnacho + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#ifndef META_EVENT_H +#define META_EVENT_H + +#include +#include +#include "display-private.h" + + +gboolean meta_input_event_get_type (MetaDisplay *display, + XEvent *ev, + guint *ev_type); + +Window meta_input_event_get_window (MetaDisplay *display, + XEvent *ev); +Window meta_input_event_get_root_window (MetaDisplay *display, + XEvent *ev); + +Time meta_input_event_get_time (MetaDisplay *display, + XEvent *ev); + +gboolean meta_input_event_get_coordinates (MetaDisplay *display, + XEvent *ev, + gdouble *x_ret, + gdouble *y_ret, + gdouble *x_root_ret, + gdouble *y_root_ret); + +gboolean meta_input_event_get_state (MetaDisplay *display, + XEvent *ev, + guint *state); +gboolean meta_input_event_get_keycode (MetaDisplay *display, + XEvent *ev, + guint *keycode); + +#endif /* META_EVENT_H */