xserver-multidpi/hw/dmx/dmxinput.c

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/*
* Copyright 2001,2002 Red Hat Inc., Durham, North Carolina.
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation on the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* Authors:
* David H. Dawes <dawes@xfree86.org>
* Kevin E. Martin <kem@redhat.com>
* Rickard E. (Rik) Faith <faith@redhat.com>
*
*/
/** \file
* Provide the main entry points for input initialization and processing
* that arequired by the dix layer.
*/
#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#include "dmx.h"
#include "dmxlog.h"
#include "dmxinput.h"
#include "inputstr.h"
#include "input.h"
#include "mi.h"
/** Returns TRUE if the key is a valid modifier. For PC-class
* keyboards, all keys can be used as modifiers, so return TRUE
* always. */
Bool LegalModifier(unsigned int key, DeviceIntPtr pDev)
{
return TRUE;
}
/** Called from dix/main.c on each server generation to initialize
* inputs. All the work is done in dmxInputInit. \see
* dmxInputInit() */
void InitInput(int argc, char **argv)
{
int i;
DMXInputInfo *dmxInput;
if (!dmxNumInputs)
dmxLog(dmxFatal, "InitInput: no inputs specified\n");
for (i = 0, dmxInput = &dmxInputs[0]; i < dmxNumInputs; i++, dmxInput++)
dmxInputInit(dmxInput);
mieqInit();
}
void CloseInput(void)
{
}
/** Called from dix/dispatch.c in Dispatch() whenever input events
* require processing. All the work is done in the lower level
* routines. */
void ProcessInputEvents(void)
{
int i;
DMXInputInfo *dmxInput;
for (i = 0, dmxInput = &dmxInputs[0]; i < dmxNumInputs; i++, dmxInput++)
if (!dmxInput->detached && dmxInput->processInputEvents)
dmxInput->processInputEvents(dmxInput);
}
/** This routine is called from \a dmxwindow.c whenever the layout of
* windows on the display might have changed. This information is used
* by input drivers (currently only the console driver) that provide
* information about window layout to the user. */
void dmxUpdateWindowInfo(DMXUpdateType type, WindowPtr pWindow)
{
int i;
DMXInputInfo *dmxInput;
for (i = 0, dmxInput = &dmxInputs[0]; i < dmxNumInputs; i++, dmxInput++)
if (!dmxInput->detached && dmxInput->updateWindowInfo)
dmxInput->updateWindowInfo(dmxInput, type, pWindow);
}
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int
NewInputDeviceRequest (InputOption *options, InputAttributes *attrs,
DeviceIntPtr *pdev)
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{
return BadRequest;
}
void
Add a "flags" field to DeleteInputDeviceRequest. Some input drivers need to implement an internal hotplugging scheme for dependent devices to provide multiple X devices off one kernel device file. Such dependent devices can be added with NewInputDeviceRequest() but they are not removed when the config backend calls DeleteInputDeviceRequest(), leaving the original device to clean up. Example of the wacom driver: config/udev calls NewInputDeviceRequest("stylus") wacom PreInit calls NewInputDeviceRequest("eraser") NewInputDeviceRequest("pad") NewInputDeviceRequest("cursor") PreInit finishes. When the device is removed, the config backend only calls DeleteInputDeviceRequest for "stylus". The driver needs to call DeleteInputDeviceRequest for the dependent devices eraser, pad and cursor to clean up properly. However, when the server terminates, DeleteInputDeviceRequest is called for all devices - the driver must not remove the dependent devices to avoid double-frees. There is no method for the driver to detect why a device is being removed, leading to elaborate guesswork and some amount of wishful thinking. Though the input driver's UnInit already supports flags, they are unused. This patch uses the flags to supply information where the DeleteInputDeviceRequest request originates from, allowing a driver to selectively call DeleteInputDeviceRequest when necessary. Also bumps XINPUT ABI. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Dan Nicholson <dbn.lists@gmail.com> Signed-off-by: Keith Packard <keithp@keithp.com>
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DeleteInputDeviceRequest(DeviceIntPtr pDev, int flags)
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{
}