From fb53e08f967268174a33a5a7772bf313659199e6 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Tue, 21 Apr 2015 18:24:39 +1000
Subject: [PATCH] tools: add --set-scroll-button as option

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
 tools/Makefile.am |  2 ++
 tools/shared.c    | 24 ++++++++++++++++++++++++
 tools/shared.h    |  1 +
 3 files changed, 27 insertions(+)

diff --git a/tools/Makefile.am b/tools/Makefile.am
index b8cc218b..707e952d 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -9,6 +9,8 @@ AM_CPPFLAGS = -I$(top_srcdir)/include \
 libshared_la_SOURCES = \
 		       shared.c \
 		       shared.h
+libshared_la_CFLAGS = $(LIBEVDEV_CFLAGS)
+libshared_la_LIBADD = $(LIBEVDEV_LIBS)
 
 event_debug_SOURCES = event-debug.c
 event_debug_LDADD = ../src/libinput.la libshared.la $(LIBUDEV_LIBS)
diff --git a/tools/shared.c b/tools/shared.c
index 15ba8bc5..9ccd5dda 100644
--- a/tools/shared.c
+++ b/tools/shared.c
@@ -30,6 +30,8 @@
 #include <string.h>
 #include <libudev.h>
 
+#include <libevdev/libevdev.h>
+
 #include "shared.h"
 
 enum options {
@@ -47,6 +49,7 @@ enum options {
 	OPT_MIDDLEBUTTON_DISABLE,
 	OPT_CLICK_METHOD,
 	OPT_SCROLL_METHOD,
+	OPT_SCROLL_BUTTON,
 	OPT_SPEED,
 };
 
@@ -78,6 +81,7 @@ tools_usage()
 	       "--disable-middlebutton.... enable/disable middle button emulation\n"
 	       "--set-click-method=[none|clickfinger|buttonareas] .... set the desired click method\n"
 	       "--set-scroll-method=[none|twofinger|edge|button] ... set the desired scroll method\n"
+	       "--set-scroll-button=BTN_MIDDLE ... set the button to the given button code\n"
 	       "--set-speed=<value>.... set pointer acceleration speed\n"
 	       "\n"
 	       "These options apply to all applicable devices, if a feature\n"
@@ -99,6 +103,7 @@ tools_init_options(struct tools_options *options)
 	options->middlebutton = -1;
 	options->click_method = -1;
 	options->scroll_method = -1;
+	options->scroll_button = -1;
 	options->backend = BACKEND_UDEV;
 	options->seat = "seat0";
 	options->speed = 0.0;
@@ -125,6 +130,7 @@ tools_parse_args(int argc, char **argv, struct tools_options *options)
 			{ "disable-middlebutton", 0, 0, OPT_MIDDLEBUTTON_DISABLE },
 			{ "set-click-method", 1, 0, OPT_CLICK_METHOD },
 			{ "set-scroll-method", 1, 0, OPT_SCROLL_METHOD },
+			{ "set-scroll-button", 1, 0, OPT_SCROLL_BUTTON },
 			{ "speed", 1, 0, OPT_SPEED },
 			{ 0, 0, 0, 0}
 		};
@@ -219,6 +225,21 @@ tools_parse_args(int argc, char **argv, struct tools_options *options)
 					return 1;
 				}
 				break;
+			case OPT_SCROLL_BUTTON:
+				if (!optarg) {
+					tools_usage();
+					return 1;
+				}
+				options->scroll_button =
+					libevdev_event_code_from_name(EV_KEY,
+								      optarg);
+				if (options->scroll_button == -1) {
+					fprintf(stderr,
+						"Invalid button %s\n",
+						optarg);
+					return 1;
+				}
+				break;
 			case OPT_SPEED:
 				if (!optarg) {
 					tools_usage();
@@ -346,6 +367,9 @@ tools_device_apply_config(struct libinput_device *device,
 	if (options->scroll_method != -1)
 		libinput_device_config_scroll_set_method(device,
 							 options->scroll_method);
+	if (options->scroll_button != -1)
+		libinput_device_config_scroll_set_button(device,
+							 options->scroll_button);
 
 	if (libinput_device_config_accel_is_available(device))
 		libinput_device_config_accel_set_speed(device,
diff --git a/tools/shared.h b/tools/shared.h
index 7b037882..a1aec462 100644
--- a/tools/shared.h
+++ b/tools/shared.h
@@ -42,6 +42,7 @@ struct tools_options {
 	int middlebutton;
 	enum libinput_config_click_method click_method;
 	enum libinput_config_scroll_method scroll_method;
+	int scroll_button;
 	double speed;
 };