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https://github.com/X11Libre/xf86-input-evdev.git
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69d6ff3e01
This is similar to commit 1f641d75ed.
It provides the same functionality of queuing the (in this case
emulated) events and waiting until an EV_SYN synchronization event is
received before posting them to the server.
This preserves the order of events (both real and emulated) and ensures
that MotionNotify events will always be posted first. It also unifies
the event posting into a few small functions which improves
maintainability.
From this point on, you should never use the xf86Post...Event()
functions in new code, but rather the EvdevPost...Event() versions.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
218 lines
7.1 KiB
C
218 lines
7.1 KiB
C
/*
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* Copyright © 2004-2008 Red Hat, Inc.
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* Copyright © 2008 University of South Australia
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of Red Hat
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* not be used in advertising or publicity pertaining to distribution
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* of the software without specific, written prior permission. Red
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* Hat makes no representations about the suitability of this software
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* for any purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
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* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Authors:
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* Kristian Høgsberg (krh@redhat.com)
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* Adam Jackson (ajax@redhat.com)
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* Peter Hutterer (peter@cs.unisa.edu.au)
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* Oliver McFadden (oliver.mcfadden@nokia.com)
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*/
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#ifndef EVDEV_H
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#define EVDEV_H
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#include <linux/input.h>
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#include <linux/types.h>
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#include <xf86Xinput.h>
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#include <xf86_OSproc.h>
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#include <xkbstr.h>
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#ifndef EV_CNT /* linux 2.4 kernels and earlier lack _CNT defines */
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#define EV_CNT (EV_MAX+1)
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#endif
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#ifndef KEY_CNT
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#define KEY_CNT (KEY_MAX+1)
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#endif
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#ifndef REL_CNT
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#define REL_CNT (REL_MAX+1)
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#endif
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#ifndef ABS_CNT
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#define ABS_CNT (ABS_MAX+1)
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#endif
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#ifndef LED_CNT
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#define LED_CNT (LED_MAX+1)
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#endif
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#define EVDEV_MAXBUTTONS 32
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#define EVDEV_MAXQUEUE 32
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#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) >= 3
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#define HAVE_PROPERTIES 1
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#endif
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#ifndef MAX_VALUATORS
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#define MAX_VALUATORS 36
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#endif
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#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 5
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typedef struct {
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char *rules;
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char *model;
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char *layout;
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char *variant;
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char *options;
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} XkbRMLVOSet;
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#endif
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#define LONG_BITS (sizeof(long) * 8)
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/* Number of longs needed to hold the given number of bits */
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#define NLONGS(x) (((x) + LONG_BITS - 1) / LONG_BITS)
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/* axis specific data for wheel emulation */
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typedef struct {
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int up_button;
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int down_button;
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int traveled_distance;
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} WheelAxis, *WheelAxisPtr;
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/* Event queue used to defer keyboard/button events until EV_SYN time. */
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typedef struct {
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enum {
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EV_QUEUE_KEY, /* xf86PostKeyboardEvent() */
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EV_QUEUE_BTN, /* xf86PostButtonEvent() */
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} type;
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int key; /* May be either a key code or button number. */
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int val; /* State of the key/button; pressed or released. */
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} EventQueueRec, *EventQueuePtr;
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typedef struct {
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const char *device;
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int grabDevice; /* grab the event device? */
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int num_vals; /* number of valuators */
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int axis_map[max(ABS_CNT, REL_CNT)]; /* Map evdev <axis> to index */
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int vals[MAX_VALUATORS];
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int old_vals[MAX_VALUATORS]; /* Translate absolute inputs to relative */
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int flags;
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int tool;
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int num_buttons; /* number of buttons */
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BOOL swap_axes;
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BOOL invert_x;
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BOOL invert_y;
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int delta[REL_CNT];
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unsigned int abs, rel;
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/* XKB stuff has to be per-device rather than per-driver */
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#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 5
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XkbComponentNamesRec xkbnames;
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#endif
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XkbRMLVOSet rmlvo;
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/* Middle mouse button emulation */
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struct {
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BOOL enabled;
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BOOL pending; /* timer waiting? */
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int buttonstate; /* phys. button state */
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int state; /* state machine (see bt3emu.c) */
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Time expires; /* time of expiry */
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Time timeout;
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} emulateMB;
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struct {
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int meta; /* meta key to lock any button */
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BOOL meta_state; /* meta_button state */
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unsigned int lock_pair[EVDEV_MAXBUTTONS]; /* specify a meta/lock pair */
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BOOL lock_state[EVDEV_MAXBUTTONS]; /* state of any locked buttons */
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} dragLock;
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struct {
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BOOL enabled;
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int button;
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int button_state;
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int inertia;
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WheelAxis X;
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WheelAxis Y;
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Time expires; /* time of expiry */
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Time timeout;
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} emulateWheel;
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/* run-time calibration */
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struct {
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int min_x;
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int max_x;
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int min_y;
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int max_y;
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} calibration;
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unsigned char btnmap[32]; /* config-file specified button mapping */
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int reopen_attempts; /* max attempts to re-open after read failure */
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int reopen_left; /* number of attempts left to re-open the device */
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OsTimerPtr reopen_timer;
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/* Cached info from device. */
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char name[1024];
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unsigned long bitmask[NLONGS(EV_CNT)];
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unsigned long key_bitmask[NLONGS(KEY_CNT)];
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unsigned long rel_bitmask[NLONGS(REL_CNT)];
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unsigned long abs_bitmask[NLONGS(ABS_CNT)];
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unsigned long led_bitmask[NLONGS(LED_CNT)];
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struct input_absinfo absinfo[ABS_CNT];
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/* minor/major number */
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dev_t min_maj;
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/* Event queue used to defer keyboard/button events until EV_SYN time. */
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int num_queue;
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EventQueueRec queue[EVDEV_MAXQUEUE];
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} EvdevRec, *EvdevPtr;
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/* Event posting functions */
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void EvdevPostKbdEvent(InputInfoPtr pInfo, struct input_event *ev, int value);
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void EvdevPostButtonEvent(InputInfoPtr pInfo, int button, int value);
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void EvdevPostButtonClicks(InputInfoPtr pInfo, int button, int count);
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void EvdevPostRelativeMotionEvents(InputInfoPtr pInfo, int *num_v, int *first_v,
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int v[MAX_VALUATORS]);
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void EvdevPostAbsoluteMotionEvents(InputInfoPtr pInfo, int *num_v, int *first_v,
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int v[MAX_VALUATORS]);
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unsigned int EvdevUtilButtonEventToButtonNumber(EvdevPtr pEvdev, int code);
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/* Middle Button emulation */
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int EvdevMBEmuTimer(InputInfoPtr);
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BOOL EvdevMBEmuFilterEvent(InputInfoPtr, int, BOOL);
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void EvdevMBEmuWakeupHandler(pointer, int, pointer);
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void EvdevMBEmuBlockHandler(pointer, struct timeval**, pointer);
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void EvdevMBEmuPreInit(InputInfoPtr);
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void EvdevMBEmuOn(InputInfoPtr);
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void EvdevMBEmuFinalize(InputInfoPtr);
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void EvdevMBEmuEnable(InputInfoPtr, BOOL);
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/* Mouse Wheel emulation */
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void EvdevWheelEmuPreInit(InputInfoPtr pInfo);
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BOOL EvdevWheelEmuFilterButton(InputInfoPtr pInfo, unsigned int button, int value);
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BOOL EvdevWheelEmuFilterMotion(InputInfoPtr pInfo, struct input_event *pEv);
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/* Draglock code */
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void EvdevDragLockPreInit(InputInfoPtr pInfo);
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BOOL EvdevDragLockFilterEvent(InputInfoPtr pInfo, unsigned int button, int value);
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#ifdef HAVE_PROPERTIES
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void EvdevMBEmuInitProperty(DeviceIntPtr);
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void EvdevWheelEmuInitProperty(DeviceIntPtr);
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void EvdevDragLockInitProperty(DeviceIntPtr);
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#endif
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#endif
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