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/*
* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
* Copyright 1993 by David Dawes <dawes@xfree86.org>
* Copyright 2002 by SuSE Linux AG, Author: Egbert Eich
* Copyright 1994-2002 by The XFree86 Project, Inc.
* Copyright 2002 by Paul Elliott
* (Ported from xf86-input-mouse, above copyrights taken from there)
* Copyright © 2008 University of South Australia
* Copyright 2008 by Chris Salch
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of the authors
* not be used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. The authors make no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/* Draglock code */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <xf86.h>
#include <xf86Xinput.h>
#include "evdev.h"
void EvdevDragLockLockButton(InputInfoPtr pInfo, unsigned int button);
/* Setup and configuration code */
void
EvdevDragLockInit(InputInfoPtr pInfo)
{
EvdevPtr pEvdev = (EvdevPtr)pInfo->private;
char *option_string = NULL;
int meta_button = 0;
int lock_button = 0;
char *next_num = NULL;
char *end_str = NULL;
BOOL pairs = FALSE;
option_string = xf86CheckStrOption(pInfo->options, "DragLockButtons",NULL);
if (!option_string)
return;
next_num = option_string;
/* Loop until we hit the end of our option string */
while (next_num != NULL) {
lock_button = 0;
meta_button = strtol(next_num, &end_str, 10);
/* check to see if we found anything */
if (next_num != end_str) {
/* setup for the next number */
next_num = end_str;
} else {
/* we have nothing more to parse, drop out of the loop */
next_num = NULL;
}
/* Check for a button to lock if we have a meta button */
if (meta_button != 0 && next_num != NULL ) {
lock_button = strtol(next_num, &end_str, 10);
/* check to see if we found anything */
if (next_num != end_str) {
/* setup for the next number */
next_num = end_str;
} else {
/* we have nothing more to parse, drop out of the loop */
next_num = NULL;
}
}
/* Ok, let the user know what we found on this look */
if (meta_button != 0) {
if (lock_button == 0) {
if (!pairs) {
/* We only have a meta button */
pEvdev->dragLock.meta = meta_button;
xf86Msg(X_CONFIG, "%s: DragLockButtons : "
"%i as meta\n",
pInfo->name, meta_button);
} else {
xf86Msg(X_ERROR, "%s: DragLockButtons : "
"Incomplete pair specifying button pairs %s\n",
pInfo->name, option_string);
}
} else {
/* Do bounds checking to make sure we don't crash */
if ((meta_button <= EVDEV_MAXBUTTONS) && (meta_button >= 0 ) &&
(lock_button <= EVDEV_MAXBUTTONS) && (lock_button >= 0)) {
xf86Msg(X_CONFIG, "%s: DragLockButtons : %i -> %i\n",
pInfo->name, meta_button, lock_button);
pEvdev->dragLock.lock_pair[meta_button - 1] = lock_button;
pairs=TRUE;
} else {
/* Let the user know something was wrong
with this pair of buttons */
xf86Msg(X_CONFIG, "%s: DragLockButtons : "
"Invalid button pair %i -> %i\n",
pInfo->name, meta_button, lock_button);
}
}
} else {
xf86Msg(X_ERROR, "%s: Found DragLockButtons "
"with invalid lock button string : '%s'\n",
pInfo->name, option_string);
/* This should be the case anyhow, just make sure */
next_num = NULL;
}
/* Check for end of string, to avoid annoying error */
if (next_num != NULL && *next_num == '\0')
next_num = NULL;
}
}
/* Updates DragLock button state and firest button event messges */
void
EvdevDragLockLockButton(InputInfoPtr pInfo, unsigned int button)
{
EvdevPtr pEvdev = (EvdevPtr)pInfo->private;
BOOL state=0;
/* update button state */
state = pEvdev->dragLock.lock_state[button - 1] ? FALSE : TRUE;
pEvdev->dragLock.lock_state[button - 1] = state;
xf86PostButtonEvent(pInfo->dev, 0, button, state, 0, 0);
}
/* Filter button presses looking for either a meta button or the
* control of a button pair.
*
* @param button button number (1 for left, 3 for right)
* @param value TRUE if button press, FALSE if release
*
* @return TRUE if the event was swallowed here, FALSE otherwise.
*/
BOOL
EvdevDragLockFilterEvent(InputInfoPtr pInfo, unsigned int button, int value)
{
EvdevPtr pEvdev = (EvdevPtr)pInfo->private;
if (button == 0)
return FALSE;
/* Do we have a single meta key or
several button pairings? */
if (pEvdev->dragLock.meta != 0) {
if (pEvdev->dragLock.meta == button) {
/* setup up for button lock */
if (value)
pEvdev->dragLock.meta_state = TRUE;
return TRUE;
} else if (pEvdev->dragLock.meta_state) { /* waiting to lock */
pEvdev->dragLock.meta_state = FALSE;
EvdevDragLockLockButton(pInfo, button);
return TRUE;
}
} else if (pEvdev->dragLock.lock_pair[button - 1] && value) {
/* A meta button in a meta/lock pair was pressed */
EvdevDragLockLockButton(pInfo, pEvdev->dragLock.lock_pair[button - 1]);
return TRUE;
}
/* Eat events for buttons that are locked */
if (pEvdev->dragLock.lock_state[button - 1])
return TRUE;
return FALSE;
}
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