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u_01-Add-a-kiosk-mode-for-touch-screens.patch
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File u_01-Add-a-kiosk-mode-for-touch-screens.patch of Package xf86-input-evdev
From: Egbert Eich <eich@linux-0ems.fritz.box> Date: Thu Apr 14 15:30:22 2016 +0200 Subject: [PATCH 1/2]Add a 'kiosk mode' for touch screens Patch-mainline: to be upstreamed References: FATE#320263 Signed-off-by: Egbert Eich <eich@suse.com> This mode provides either a 'click-on-touch' or 'click-on-release'. The button to track can be specified with an option. Signed-off-by: Egbert Eich <eich@freedesktop.org> --- include/evdev-properties.h | 3 + man/evdev.man | 20 +++++ src/Makefile.am | 1 + src/evdev.c | 13 ++- src/evdev.h | 17 ++++ src/kioskTouch.c | 215 +++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 265 insertions(+), 4 deletions(-) diff --git a/include/evdev-properties.h b/include/evdev-properties.h index 8ae5ba3..29f2bd9 100644 --- a/include/evdev-properties.h +++ b/include/evdev-properties.h @@ -91,4 +91,7 @@ /* INT32, 3 values (vertical, horizontal, dial) */ #define EVDEV_PROP_SCROLL_DISTANCE "Evdev Scrolling Distance" +/* Kiosk Touch mode */ +#define EVDEV_PROP_KIOSK_TOUCH "Evdev Kiosk Touch Mode" +#define EVDEV_PROP_KIOSK_BUTTON "Evdev Kiosk Touch Button" #endif diff --git a/man/evdev.man b/man/evdev.man index e70ae1f..404a88d 100644 --- a/man/evdev.man +++ b/man/evdev.man @@ -244,6 +244,20 @@ Sets the resolution of the device in dots per inch. The resolution is used to scale relative motion events from mouse devices to 1000 DPI resolution. This can be used to make high resolution mice less sensitive without turning off acceleration. If set to 0 no scaling will be performed. Default: "0". +.TP 7 +.BI "Option \*qKioskTouchMode\*q \*q" "N" \*q +Specifies the Kiosk Touch mode to use. Mode +.I N +sets the mode: 0 - off, 1 - click on touch, 2 - click on release. +Default: "0". Property: +"Evdev Kiosk Touch Mode". +.TP 7 +.BI "Option \*qKioskTouchButton\*q \*q" "N" \*q +Specifies the Kiosk Touch button number to use. Button +.I N +range: 0-255. +Default: "0". Property: +"Evdev Kiosk Touch Button". .SH SUPPORTED PROPERTIES The following properties are provided by the @@ -287,6 +301,12 @@ value. .TP 7 .BI "Evdev Scrolling Distance" 3 32-bit values: vertical, horizontal and dial. +.TP 7 +.BI "Evdev Kiosk Touch Mode" +1 8-bit positive value. +.TP 7 +.BI "Evdev Kiosk Touch Button" +1 8-bit positive value. .SH AUTHORS Kristian Høgsberg, Peter Hutterer diff --git a/src/Makefile.am b/src/Makefile.am index 5e0c3b3..23e7421 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -40,5 +40,6 @@ AM_CPPFLAGS =-I$(top_srcdir)/include $(LIBEVDEV_CFLAGS) emuWheel.c \ draglock.c \ apple.c \ + kioskTouch.c \ axis_labels.h diff --git a/src/evdev.c b/src/evdev.c index 3176660..a72a866 100644 --- a/src/evdev.c +++ b/src/evdev.c @@ -584,6 +584,9 @@ EvdevProcessButtonEvent(InputInfoPtr pInfo, struct input_event *ev) if (EvdevWheelEmuFilterButton(pInfo, button, value)) return; + if (EvdevKioskTouchFilterButton(pInfo, button, value)) + return; + if (EvdevMBEmuFilterEvent(pInfo, button, value)) return; @@ -636,7 +639,7 @@ EvdevProcessTouch(InputInfoPtr pInfo) int type; int slot = pEvdev->cur_slot; - if (slot < 0 || !pEvdev->mt_mask) + if (slot < 0 || !pEvdev->mt_mask || EvdevKioskTouchFilterTouch(pEvdev)) return; if (!pEvdev->slots[slot].dirty) @@ -670,7 +673,7 @@ EvdevProcessTouch(InputInfoPtr pInfo) valuator_mask_zero(pEvdev->mt_mask); } -static int +int num_slots(EvdevPtr pEvdev) { int value; @@ -702,7 +705,7 @@ EvdevProcessTouchEvent(InputInfoPtr pInfo, struct input_event *ev) !libevdev_has_event_code(pEvdev->dev, EV_ABS, ABS_MT_SLOT)) return; - if (pEvdev->fake_mt) + if (pEvdev->fake_mt || EvdevKioskTouchFilterTouch(pEvdev)) return; if (ev->code == ABS_MT_SLOT) { @@ -832,7 +835,7 @@ EvdevProcessKeyEvent(InputInfoPtr pInfo, struct input_event *ev) */ if (!(pEvdev->flags & (EVDEV_TOUCHSCREEN | EVDEV_TABLET)) || - pEvdev->mt_mask) + (pEvdev->mt_mask && !EvdevKioskTouchFilterTouch(pEvdev))) break; /* Treat BTN_TOUCH from devices that only have BTN_TOUCH as * BTN_LEFT. */ @@ -1935,6 +1938,7 @@ EvdevInit(DeviceIntPtr device) EvdevWheelEmuInitProperty(device); EvdevDragLockInitProperty(device); EvdevAppleInitProperty(device); + EvdevKioskTouchInitProperty(device); return Success; } @@ -2641,6 +2645,7 @@ EvdevPreInit(InputDriverPtr drv, InputInfoPtr pInfo, int flags) EvdevWheelEmuPreInit(pInfo); EvdevDragLockPreInit(pInfo); } + EvdevKioskTouchPreInit(pInfo); return Success; diff --git a/src/evdev.h b/src/evdev.h index 4d44d2b..27c1cb2 100644 --- a/src/evdev.h +++ b/src/evdev.h @@ -219,6 +219,15 @@ typedef struct { int horiz_delta; int dial_delta; } smoothScroll; + struct { + int mode; + int mode_queued; + /* 0: 0ff, 1: click on touch, 2: click on release */ + unsigned int button_queued; + unsigned int button; + unsigned int state; + } kioskTouch; + /* run-time calibration */ struct { int min_x; @@ -245,6 +254,8 @@ typedef struct { char *type_name; } EvdevRec, *EvdevPtr; +int num_slots(EvdevPtr pEvdev); + /* Event posting functions */ void EvdevQueueKbdEvent(InputInfoPtr pInfo, struct input_event *ev, int value); void EvdevQueueButtonEvent(InputInfoPtr pInfo, int button, int value); @@ -289,4 +300,10 @@ void Evdev3BEmuInitProperty(DeviceIntPtr); void EvdevWheelEmuInitProperty(DeviceIntPtr); void EvdevDragLockInitProperty(DeviceIntPtr); void EvdevAppleInitProperty(DeviceIntPtr); + +/* Kiosk Touch */ +void EvdevKioskTouchPreInit(InputInfoPtr pInfo); +BOOL EvdevKioskTouchFilterButton(InputInfoPtr pInfo, unsigned int button, int value); +void EvdevKioskTouchInitProperty(DeviceIntPtr); +BOOL EvdevKioskTouchFilterTouch(EvdevPtr pEvdev); #endif diff --git a/src/kioskTouch.c b/src/kioskTouch.c new file mode 100644 index 0000000..d32f386 --- /dev/null +++ b/src/kioskTouch.c @@ -0,0 +1,215 @@ +/* + * Copyright 2016 Egbert Eich + * + * 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. + * + */ + + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include "evdev.h" + +#include <unistd.h> + +#include <xf86.h> +#include <xf86Xinput.h> +#include <exevents.h> +#include <xorgVersion.h> + +#include <X11/Xatom.h> +#include <evdev-properties.h> + +#define DEBUG(x) x; + +static Atom prop_ktouch = 0; /* Kiosk touch emulation on/off property */ +static Atom prop_ktouch_button = 0; /* Kiosk touch emulation button property */ + +#define KTOUCH_STATE_ACTIVE 1U << 0 + +void +EvdevKioskTouchPreInit(InputInfoPtr pInfo) +{ + EvdevPtr pEvdev = (EvdevPtr)pInfo->private; + int val; + + if (!(pEvdev->flags & EVDEV_ABSOLUTE_EVENTS) || + !(pEvdev->flags & EVDEV_BUTTON_EVENTS) || + (pEvdev->flags & EVDEV_RELATIVE_EVENTS) || + (pEvdev->flags & EVDEV_TOUCHPAD) || + !libevdev_has_event_code(pEvdev->dev, EV_ABS, ABS_X) || + !libevdev_has_event_code(pEvdev->dev, EV_ABS, ABS_Y)) { + pEvdev->kioskTouch.mode = -1; + return; + } + val = xf86SetIntOption(pInfo->options, "KioskTouchMode", 0); + if (val < 0 || val > 2) { + xf86Msg(X_WARNING, "%s: Invalid KioskTouchMode value: %d\n", + pInfo->name, val); + pEvdev->kioskTouch.mode = 0; + } else { + pEvdev->kioskTouch.mode = pEvdev->kioskTouch.mode_queued = val; + } + val = xf86SetIntOption(pInfo->options, "KioskTouchButton", 1); + if (val > 255) { + xf86Msg(X_WARNING, "%s: Invalid KioskTouchButton value: %d\n", + pInfo->name, val); + val = 0; + } + pEvdev->kioskTouch.button = pEvdev->kioskTouch.button_queued = val; + pEvdev->kioskTouch.state = 0; + xf86Msg(X_INFO, "%s: KioskTouchpad mode initialized to %s - button: %d\n", + pInfo->name, (pEvdev->kioskTouch.mode == 0) ? "disabled" : + (pEvdev->kioskTouch.mode == 1 ? "click-on-touch" : "click-on-release"), + pEvdev->kioskTouch.button); +} + +static void +EvdevKioskTouchSwitchQueued(EvdevPtr pEvdev) +{ + if (pEvdev->kioskTouch.mode != pEvdev->kioskTouch.mode_queued || + pEvdev->kioskTouch.button != pEvdev->kioskTouch.button_queued) { + if (pEvdev->kioskTouch.state & KTOUCH_STATE_ACTIVE) + return; + if (pEvdev->mt_mask) { + int i; + for (i = 0; i < num_slots(pEvdev); i++) { + if (pEvdev->slots[i].dirty) + return; + } + } + pEvdev->kioskTouch.mode = pEvdev->kioskTouch.mode_queued; + pEvdev->kioskTouch.button = pEvdev->kioskTouch.button_queued; + } +} + +BOOL +EvdevKioskTouchFilterTouch(EvdevPtr pEvdev) +{ + EvdevKioskTouchSwitchQueued(pEvdev); + return (pEvdev->kioskTouch.mode > 0) ? TRUE : FALSE; +} + +BOOL +EvdevKioskTouchFilterButton(InputInfoPtr pInfo, unsigned int button, int value) +{ + EvdevPtr pEvdev = (EvdevPtr)pInfo->private; + + EvdevKioskTouchSwitchQueued(pEvdev); + if (button && button == pEvdev->kioskTouch.button) { + if (value == 1) + pEvdev->kioskTouch.state = KTOUCH_STATE_ACTIVE; + else + pEvdev->kioskTouch.state = 0; + switch (pEvdev->kioskTouch.mode) { + case 0: + DEBUG((ErrorF("%s: mode 1 button %d value %d\n", \ + __func__, button, value))) + return FALSE; + case 1: + if (value == 1) { + DEBUG((ErrorF("%s: Sending ButtonDown/ButtonUp\n",__func__))) + EvdevQueueButtonClicks(pInfo, button, 1); + } else if (value == 0) { + pEvdev->kioskTouch.state = 0; + } + return TRUE; + case 2: + DEBUG((ErrorF("%s: mode 2 button %d value %d\n", \ + __func__, button, value))) + if (value == 1) + return TRUE; + else if (value == 0) { + DEBUG((ErrorF("%s: Sending ButtonDown\n",__func__))) + EvdevQueueButtonEvent(pInfo, button, 1); + } + return FALSE; + default: + return FALSE; + } + } + + return FALSE; +} + +static int +EvdevKioskTouchSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val, + BOOL checkonly) +{ + InputInfoPtr pInfo = dev->public.devicePrivate; + EvdevPtr pEvdev = pInfo->private; + + if (atom == prop_ktouch) + { + if (val->format != 8 || val->size != 1 || val->type != XA_INTEGER) + return BadMatch; + + if (!checkonly) + pEvdev->kioskTouch.mode_queued = *((unsigned char*)val->data); + } else if (atom == prop_ktouch_button) { + + if (val->format != 8 || val->size != 1 || val->type != XA_INTEGER) + return BadMatch; + + if (!checkonly) + pEvdev->kioskTouch.button_queued = *((unsigned char*)val->data); + } + + return Success; +} + +void +EvdevKioskTouchInitProperty(DeviceIntPtr dev) +{ + InputInfoPtr pInfo = dev->public.devicePrivate; + EvdevPtr pEvdev = pInfo->private; + int rc; + + if (pEvdev->mt_mask && !libevdev_has_event_code(pEvdev->dev, EV_KEY, BTN_TOUCH)) { + xf86Msg(X_WARNING, "%s: MultiTouch device has no BTN_TOUCH event: " + "no Kiosk Mode support\n", pInfo->name); + pEvdev->kioskTouch.mode = -1; + } + + if (pEvdev->kioskTouch.mode < 0) + return; + + prop_ktouch = MakeAtom(EVDEV_PROP_KIOSK_TOUCH, strlen(EVDEV_PROP_KIOSK_TOUCH), TRUE); + rc = XIChangeDeviceProperty(dev, prop_ktouch, XA_INTEGER, 8, + PropModeReplace, 1, + &pEvdev->kioskTouch.mode, + FALSE); + if (rc != Success) + return; + XISetDevicePropertyDeletable(dev, prop_ktouch, FALSE); + + prop_ktouch_button = MakeAtom(EVDEV_PROP_KIOSK_BUTTON, strlen(EVDEV_PROP_KIOSK_BUTTON), + TRUE); + rc = XIChangeDeviceProperty(dev, prop_ktouch_button, XA_INTEGER, 8, + PropModeReplace, 1, + &pEvdev->kioskTouch.button, + FALSE); + if (rc != Success) + return; + XISetDevicePropertyDeletable(dev, prop_ktouch_button, FALSE); + + XIRegisterPropertyHandler(dev, EvdevKioskTouchSetProperty, NULL, NULL); +}
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