diff options
Diffstat (limited to 'src/draglock.c')
-rw-r--r-- | src/draglock.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/src/draglock.c b/src/draglock.c new file mode 100644 index 0000000..ac9d9c0 --- /dev/null +++ b/src/draglock.c @@ -0,0 +1,318 @@ +/* + * 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 + * Copyright 2008 Red Hat, Inc. + * + * 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 "evdev.h" + +#include <xf86.h> +#include <xf86Xinput.h> +#include <X11/Xatom.h> +#include <exevents.h> + +#include <evdev-properties.h> + +static Atom prop_dlock = 0; /* Drag lock buttons. */ + +void EvdevDragLockLockButton(InputInfoPtr pInfo, unsigned int button); + + +/* Setup and configuration code */ +void +EvdevDragLockPreInit(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; + + xf86IDrvMsg(pInfo, X_CONFIG, "DragLockButtons : " + "%i as meta\n", meta_button); + } else { + xf86IDrvMsg(pInfo, X_ERROR, "DragLockButtons : " + "Incomplete pair specifying button pairs %s\n", + 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)) { + + xf86IDrvMsg(pInfo, X_CONFIG, + "DragLockButtons : %i -> %i\n", + 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 */ + xf86IDrvMsg(pInfo, X_CONFIG,"DragLockButtons : " + "Invalid button pair %i -> %i\n", + meta_button, lock_button); + } + } + } else { + xf86IDrvMsg(pInfo, X_ERROR, "Found DragLockButtons " + "with invalid lock button string : '%s'\n", + 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; + } + + free(option_string); +} + +/* Updates DragLock button state and fires 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; + + EvdevQueueButtonEvent(pInfo, button, state); +} + +/* 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; +} + +/** + * Set the drag lock property. + * If only one value is supplied, then this is used as the meta button. + * If more than one value is supplied, then each value is the drag lock button + * for the pair. 0 disables a pair. + * i.e. to set bt 3 to draglock button 1, supply 0,0,1 + */ +static int +EvdevDragLockSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val, + BOOL checkonly) +{ + InputInfoPtr pInfo = dev->public.devicePrivate; + EvdevPtr pEvdev = pInfo->private; + + if (atom == prop_dlock) + { + int i; + + if (val->format != 8 || val->type != XA_INTEGER) + return BadMatch; + + /* Don't allow changes while a lock is active */ + if (pEvdev->dragLock.meta) + { + if (pEvdev->dragLock.meta_state) + return BadAccess; + } else + { + for (i = 0; i < EVDEV_MAXBUTTONS; i++) + if (pEvdev->dragLock.lock_state[i]) + return BadValue; + } + + if (val->size == 0) + return BadMatch; + else if (val->size == 1) + { + int meta = *((CARD8*)val->data); + if (meta > EVDEV_MAXBUTTONS) + return BadValue; + + if (!checkonly) + { + pEvdev->dragLock.meta = meta; + memset(pEvdev->dragLock.lock_pair, 0, sizeof(pEvdev->dragLock.lock_pair)); + } + } else if ((val->size % 2) == 0) + { + CARD8* vals = (CARD8*)val->data; + + for (i = 0; i < val->size && i < EVDEV_MAXBUTTONS; i++) + if (vals[i] > EVDEV_MAXBUTTONS) + return BadValue; + + if (!checkonly) + { + pEvdev->dragLock.meta = 0; + memset(pEvdev->dragLock.lock_pair, 0, sizeof(pEvdev->dragLock.lock_pair)); + + for (i = 0; i < val->size && i < EVDEV_MAXBUTTONS; i += 2) + pEvdev->dragLock.lock_pair[vals[i] - 1] = vals[i + 1]; + } + } else + return BadMatch; + } + + return Success; +} + +/** + * Initialise property for drag lock buttons setting. + */ +void +EvdevDragLockInitProperty(DeviceIntPtr dev) +{ + InputInfoPtr pInfo = dev->public.devicePrivate; + EvdevPtr pEvdev = pInfo->private; + + if (!dev->button) /* don't init prop for keyboards */ + return; + + prop_dlock = MakeAtom(EVDEV_PROP_DRAGLOCK, strlen(EVDEV_PROP_DRAGLOCK), TRUE); + if (pEvdev->dragLock.meta) + { + XIChangeDeviceProperty(dev, prop_dlock, XA_INTEGER, 8, + PropModeReplace, 1, &pEvdev->dragLock.meta, + FALSE); + } else { + int highest = 0; + int i; + CARD8 pair[EVDEV_MAXBUTTONS] = {0}; + + for (i = 0; i < EVDEV_MAXBUTTONS; i++) + { + if (pEvdev->dragLock.lock_pair[i]) + highest = i; + pair[i] = pEvdev->dragLock.lock_pair[i]; + } + + XIChangeDeviceProperty(dev, prop_dlock, XA_INTEGER, 8, PropModeReplace, + highest + 1, pair, FALSE); + } + + XISetDevicePropertyDeletable(dev, prop_dlock, FALSE); + + XIRegisterPropertyHandler(dev, EvdevDragLockSetProperty, NULL, NULL); +} |