New properties: "Evdev Third Button Emulation" → switch on/off "Evdev Third Button Emulation Timeout" → timeout until event is delivered "Evdev Third Button Emulation Button" → phys button to be emulated "Evdev Third Button Emulation Threshold" → move threshold before emulation is cancelled Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Tested-by: Benjamin Tissoires <tissoire@cena.fr>master
Peter Hutterer
15 years ago
parent
22db196815
commit
d9001a6be9
6 changed files with 492 additions and 0 deletions
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/*
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* Copyright © 2011 Red Hat, Inc. |
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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 the authors |
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* not be used in advertising or publicity pertaining to distribution of the |
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* software without specific, written prior permission. The authors make no |
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* representations about the suitability of this software for any |
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* 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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*/ |
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/* Right mouse button emulation code.
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* Emulates a right button event if the first button is held down for a |
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* timeout. If the device moves more than a certain amount before the |
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* timeout is over, the emulation is cancelled and a normal button event is |
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* generated. |
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*/ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "evdev.h" |
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#include <X11/Xatom.h> |
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#include <xf86.h> |
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#include <xf86Xinput.h> |
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#include <exevents.h> |
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#include <evdev-properties.h> |
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/* Threshold (in device coordinates) for devices to cancel emulation */ |
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#define DEFAULT_MOVE_THRESHOLD 20 |
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static Atom prop_3bemu; /* Right button emulation on/off property */ |
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static Atom prop_3btimeout; /* Right button timeout property */ |
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static Atom prop_3bbutton; /* Right button target physical button */ |
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static Atom prop_3bthreshold; /* Right button move cancellation threshold */ |
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/* State machine for 3rd button emulation */ |
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enum EmulationState { |
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EM3B_OFF, /* no event */ |
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EM3B_PENDING, /* timer pending */ |
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EM3B_EMULATING /* in emulation */ |
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}; |
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static void |
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Evdev3BEmuPostButtonEvent(InputInfoPtr pInfo, int button, int press) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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int absolute = 0; |
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/* if we cancel, emit the button down event at our start position,
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* not at the current position. Only for absolute devices though. For |
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* relative events, this may be a bit iffy since pointer accel may shoot |
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* us back more than we moved and confuse the user. |
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*/ |
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if (emu3B->flags & EVDEV_ABSOLUTE_EVENTS) |
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absolute = 1; |
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xf86PostButtonEventP(pInfo->dev, absolute, button, press, 0, |
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(absolute ? 2 : 0), emu3B->startpos); |
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} |
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/**
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* Timer function. Post a button down event to the server. |
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* |
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* @param arg The InputInfoPtr for this device. |
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*/ |
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CARD32 |
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Evdev3BEmuTimer(OsTimerPtr timer, CARD32 time, pointer arg) |
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{ |
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InputInfoPtr pInfo = (InputInfoPtr)arg; |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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int sigstate = 0; |
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sigstate = xf86BlockSIGIO (); |
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emu3B->state = EM3B_EMULATING; |
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Evdev3BEmuPostButtonEvent(pInfo, emu3B->button, 1); |
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xf86UnblockSIGIO (sigstate); |
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return 0; |
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} |
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/**
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* Cancel all emulation, reset the timer and reset deltas. |
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*/ |
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static void |
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Evdev3BCancel(InputInfoPtr pInfo) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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if (emu3B->state != EM3B_OFF) |
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{ |
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TimerCancel(emu3B->timer); |
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emu3B->state = EM3B_OFF; |
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memset(emu3B->delta, 0, sizeof(emu3B->delta)); |
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} |
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emu3B->flags = 0; |
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} |
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/**
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* Emulate a third button on button press. Note that emulation only triggers |
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* on button 1. |
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* |
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* Return TRUE if event was swallowed by middle mouse button emulation, |
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* FALSE otherwise. |
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*/ |
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BOOL |
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Evdev3BEmuFilterEvent(InputInfoPtr pInfo, int button, BOOL press) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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int ret = FALSE; |
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if (!emu3B->enabled) |
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goto out; |
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if (press) |
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emu3B->buttonstate |= button; |
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else |
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emu3B->buttonstate &= ~button; |
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/* Any other button pressed? Cancel timer */ |
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if (button != 1) |
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{ |
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switch (emu3B->state) |
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{ |
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case EM3B_PENDING: |
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Evdev3BEmuPostButtonEvent(pInfo, 1, 1); |
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Evdev3BCancel(pInfo); |
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break; |
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case EM3B_EMULATING: |
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/* We're emulating and now the user pressed a different
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* button. Just release the emulating one, tell the user to |
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* not do that and get on with life */ |
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Evdev3BEmuPostButtonEvent(pInfo, emu3B->button, 0); |
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Evdev3BCancel(pInfo); |
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break; |
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default: |
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break; |
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} |
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goto out; |
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} |
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/* Don't emulate if any other button is down */ |
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if ((emu3B->buttonstate & ~0x1) != 0) |
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goto out; |
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/* Release event → cancel, send press and release now. */ |
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if (!press) |
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{ |
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switch(emu3B->state) |
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{ |
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case EM3B_PENDING: |
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Evdev3BEmuPostButtonEvent(pInfo, 1, 1); |
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Evdev3BCancel(pInfo); |
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break; |
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case EM3B_EMULATING: |
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Evdev3BEmuPostButtonEvent(pInfo, emu3B->button, 0); |
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Evdev3BCancel(pInfo); |
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ret = TRUE; |
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break; |
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default: |
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break; |
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} |
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goto out; |
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} |
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if (press && emu3B->state == EM3B_OFF) |
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{ |
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emu3B->state = EM3B_PENDING; |
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emu3B->timer = TimerSet(emu3B->timer, 0, emu3B->timeout, |
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Evdev3BEmuTimer, pInfo); |
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ret = TRUE; |
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goto out; |
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} |
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out: |
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return ret; |
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} |
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/**
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* Handle absolute x/y motion. If the motion is above the threshold, cancel |
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* emulation. |
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*/ |
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void |
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Evdev3BEmuProcessAbsMotion(InputInfoPtr pInfo, ValuatorMask *vals) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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int cancel = FALSE; |
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int axis = 0; |
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if (emu3B->state != EM3B_PENDING) |
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{ |
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if (valuator_mask_isset(vals, 0)) |
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emu3B->startpos[0] = valuator_mask_get(vals, 0); |
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if (valuator_mask_isset(vals, 1)) |
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emu3B->startpos[1] = valuator_mask_get(vals, 1); |
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return; |
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} |
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if ((emu3B->flags & EVDEV_ABSOLUTE_EVENTS) == 0) |
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emu3B->flags |= EVDEV_ABSOLUTE_EVENTS; |
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while (axis <= 1 && !cancel) |
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{ |
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if (valuator_mask_isset(vals, axis)) |
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{ |
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int delta = valuator_mask_get(vals, axis) - emu3B->startpos[axis]; |
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if (abs(delta) > emu3B->threshold) |
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cancel = TRUE; |
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} |
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axis++; |
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} |
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if (cancel) |
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{ |
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Evdev3BEmuPostButtonEvent(pInfo, 1, 1); |
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Evdev3BCancel(pInfo); |
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} |
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} |
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/**
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* Handle relative x/y motion. If the motion is above the threshold, cancel |
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* emulation. |
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*/ |
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void |
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Evdev3BEmuProcessRelMotion(InputInfoPtr pInfo, int dx, int dy) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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if (emu3B->state != EM3B_PENDING) |
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return; |
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emu3B->delta[0] += dx; |
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emu3B->delta[1] += dy; |
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emu3B->flags |= EVDEV_RELATIVE_EVENTS; |
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if (abs(emu3B->delta[0]) > emu3B->threshold || |
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abs(emu3B->delta[1]) > emu3B->threshold) |
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{ |
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Evdev3BEmuPostButtonEvent(pInfo, 1, 1); |
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Evdev3BCancel(pInfo); |
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} |
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} |
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void |
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Evdev3BEmuPreInit(InputInfoPtr pInfo) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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emu3B->enabled = xf86SetBoolOption(pInfo->options, |
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"EmulateThirdButton", |
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FALSE); |
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emu3B->timeout = xf86SetIntOption(pInfo->options, |
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"EmulateThirdButtonTimeout", |
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1000); |
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emu3B->button = xf86SetBoolOption(pInfo->options, |
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"EmulateThirdButtonButton", |
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3); |
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/* FIXME: this should be auto-configured based on axis ranges */ |
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emu3B->threshold = xf86SetBoolOption(pInfo->options, |
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"EmulateThirdButtonMoveThreshold", |
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DEFAULT_MOVE_THRESHOLD); |
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/* allocate now so we don't allocate in the signal handler */ |
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emu3B->timer = TimerSet(NULL, 0, 0, NULL, NULL); |
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} |
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void |
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Evdev3BEmuOn(InputInfoPtr pInfo) |
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{ |
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/* This function just exists for symmetry in evdev.c */ |
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} |
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void |
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Evdev3BEmuFinalize(InputInfoPtr pInfo) |
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{ |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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TimerFree(emu3B->timer); |
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emu3B->timer = NULL; |
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} |
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static int |
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Evdev3BEmuSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val, |
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BOOL checkonly) |
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{ |
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InputInfoPtr pInfo = dev->public.devicePrivate; |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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if (atom == prop_3bemu) |
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{ |
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if (val->format != 8 || val->size != 1 || val->type != XA_INTEGER) |
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return BadMatch; |
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if (!checkonly) |
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emu3B->enabled = *((BOOL*)val->data); |
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} else if (atom == prop_3btimeout) |
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{ |
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if (val->format != 32 || val->size != 1 || val->type != XA_INTEGER) |
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return BadMatch; |
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if (!checkonly) |
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emu3B->timeout = *((CARD32*)val->data); |
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} else if (atom == prop_3bbutton) |
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{ |
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if (val->format != 8 || val->size != 1 || val->type != XA_INTEGER) |
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return BadMatch; |
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if (!checkonly) |
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emu3B->button = *((CARD8*)val->data); |
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} else if (atom == prop_3bthreshold) |
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{ |
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if (val->format != 32 || val->size != 1 || val->type != XA_INTEGER) |
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return BadMatch; |
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if (!checkonly) |
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emu3B->threshold = *((CARD32*)val->data); |
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} |
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return Success; |
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} |
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/**
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* Initialise properties for third button emulation |
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*/ |
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void |
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Evdev3BEmuInitProperty(DeviceIntPtr dev) |
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{ |
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InputInfoPtr pInfo = dev->public.devicePrivate; |
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EvdevPtr pEvdev = pInfo->private; |
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struct emulate3B *emu3B = &pEvdev->emulate3B; |
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int rc; |
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if (!dev->button) /* don't init prop for keyboards */ |
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return; |
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/* third button emulation on/off */ |
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prop_3bemu = MakeAtom(EVDEV_PROP_THIRDBUTTON, strlen(EVDEV_PROP_THIRDBUTTON), TRUE); |
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rc = XIChangeDeviceProperty(dev, prop_3bemu, XA_INTEGER, 8, |
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PropModeReplace, 1, |
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&emu3B->enabled, |
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FALSE); |
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if (rc != Success) |
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return; |
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XISetDevicePropertyDeletable(dev, prop_3bemu, FALSE); |
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/* third button emulation timeout */ |
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prop_3btimeout = MakeAtom(EVDEV_PROP_THIRDBUTTON_TIMEOUT, |
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strlen(EVDEV_PROP_THIRDBUTTON_TIMEOUT), |
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TRUE); |
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rc = XIChangeDeviceProperty(dev, prop_3btimeout, XA_INTEGER, 32, PropModeReplace, 1, |
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&emu3B->timeout, FALSE); |
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if (rc != Success) |
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return; |
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XISetDevicePropertyDeletable(dev, prop_3btimeout, FALSE); |
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/* third button emulation button to be triggered */ |
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prop_3bbutton = MakeAtom(EVDEV_PROP_THIRDBUTTON_BUTTON, |
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strlen(EVDEV_PROP_THIRDBUTTON_BUTTON), |
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TRUE); |
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rc = XIChangeDeviceProperty(dev, prop_3bbutton, XA_INTEGER, 8, PropModeReplace, 1, |
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&emu3B->button, FALSE); |
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if (rc != Success) |
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return; |
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XISetDevicePropertyDeletable(dev, prop_3bbutton, FALSE); |
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/* third button emulation movement threshold */ |
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prop_3bthreshold = MakeAtom(EVDEV_PROP_THIRDBUTTON_THRESHOLD, |
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strlen(EVDEV_PROP_THIRDBUTTON_THRESHOLD), |
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TRUE); |
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rc = XIChangeDeviceProperty(dev, prop_3bthreshold, XA_INTEGER, 32, PropModeReplace, 1, |
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&emu3B->threshold, FALSE); |
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if (rc != Success) |
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return; |
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XISetDevicePropertyDeletable(dev, prop_3bthreshold, FALSE); |
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XIRegisterPropertyHandler(dev, Evdev3BEmuSetProperty, NULL, NULL); |
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} |
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