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/*
 * Copyright © 2013 Red Hat, Inc.
 *
 * 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
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif

#ifndef LITEST_H
#define LITEST_H

#include <stdbool.h>
#include <check.h>
#include <libevdev/libevdev.h>
#include <libevdev/libevdev-uinput.h>
#include <libinput.h>
#include <math.h>

#define litest_assert(cond) \
	do { \
		if (!(cond)) \
			litest_fail_condition(__FILE__, __LINE__, __func__, \
					      #cond, NULL); \
	} while(0)

#define litest_assert_msg(cond, ...) \
	do { \
		if (!(cond)) \
			litest_fail_condition(__FILE__, __LINE__, __func__, \
					      #cond, __VA_ARGS__); \
	} while(0)

#define litest_abort_msg(...) \
	litest_fail_condition(__FILE__, __LINE__, __func__, \
			      "aborting", __VA_ARGS__); \

#define litest_assert_notnull(cond) \
	do { \
		if ((cond) == NULL) \
			litest_fail_condition(__FILE__, __LINE__, __func__, \
					      #cond, " expected to be not NULL\n"); \
	} while(0)

#define litest_assert_comparison_int_(a_, op_, b_) \
	do { \
		__typeof__(a_) _a = a_; \
		__typeof__(b_) _b = b_; \
		if (trunc(_a) != _a || trunc(_b) != _b) \
			litest_abort_msg("litest_assert_int_* used for non-integer value\n"); \
		if (!((_a) op_ (_b))) \
			litest_fail_comparison_int(__FILE__, __LINE__, __func__,\
						   #op_, _a, _b, \
						   #a_, #b_); \
	} while(0)

#define litest_assert_int_eq(a_, b_) \
	litest_assert_comparison_int_(a_, ==, b_)

#define litest_assert_int_ne(a_, b_) \
	litest_assert_comparison_int_(a_, !=, b_)

#define litest_assert_int_lt(a_, b_) \
	litest_assert_comparison_int_(a_, <, b_)

#define litest_assert_int_le(a_, b_) \
	litest_assert_comparison_int_(a_, <=, b_)

#define litest_assert_int_ge(a_, b_) \
	litest_assert_comparison_int_(a_, >=, b_)

#define litest_assert_int_gt(a_, b_) \
	litest_assert_comparison_int_(a_, >, b_)

#define litest_assert_comparison_ptr_(a_, op_, b_) \
	do { \
		__typeof__(a_) _a = a_; \
		__typeof__(b_) _b = b_; \
		if (!((_a) op_ (_b))) \
			litest_fail_comparison_ptr(__FILE__, __LINE__, __func__,\
						   #a_ " " #op_ " " #b_); \
	} while(0)

#define litest_assert_ptr_eq(a_, b_) \
	litest_assert_comparison_ptr_(a_, ==, b_)

#define litest_assert_ptr_ne(a_, b_) \
	litest_assert_comparison_ptr_(a_, !=, b_)

#define litest_assert_ptr_null(a_) \
	litest_assert_comparison_ptr_(a_, ==, NULL)

#define litest_assert_ptr_notnull(a_) \
	litest_assert_comparison_ptr_(a_, !=, NULL)

enum litest_device_type {
	LITEST_NO_DEVICE = -1,
	LITEST_SYNAPTICS_CLICKPAD = -2,
	LITEST_SYNAPTICS_TOUCHPAD = -3,
	LITEST_SYNAPTICS_TOPBUTTONPAD = -4,
	LITEST_BCM5974 = -5,
	LITEST_KEYBOARD = -6,
	LITEST_TRACKPOINT = -7,
	LITEST_MOUSE = -8,
	LITEST_WACOM_TOUCH = -9,
	LITEST_ALPS_SEMI_MT = -10,
	LITEST_GENERIC_SINGLETOUCH = -11,
	LITEST_MS_SURFACE_COVER = -12,
	LITEST_QEMU_TABLET = -13,
	LITEST_XEN_VIRTUAL_POINTER = -14,
	LITEST_VMWARE_VIRTMOUSE = -15,
	LITEST_SYNAPTICS_HOVER_SEMI_MT = -16,
	LITEST_SYNAPTICS_TRACKPOINT_BUTTONS = -17,
	LITEST_PROTOCOL_A_SCREEN = -18,
	LITEST_WACOM_FINGER = -19,
	LITEST_KEYBOARD_BLACKWIDOW = -20,
	LITEST_WHEEL_ONLY = -21,
	LITEST_MOUSE_ROCCAT = -22,
	LITEST_LOGITECH_TRACKBALL = -23,
	LITEST_ATMEL_HOVER = -24,
	LITEST_ALPS_DUALPOINT = -25,
	LITEST_MOUSE_LOW_DPI = -26,
	LITEST_GENERIC_MULTITOUCH_SCREEN = -27,
	LITEST_NEXUS4_TOUCH_SCREEN = -28,
	LITEST_MAGIC_TRACKPAD = -29,
	LITEST_ELANTECH_TOUCHPAD = -30,
	LITEST_WACOM_BAMBOO = -31,
	LITEST_WACOM_CINTIQ = -32,
	LITEST_WACOM_INTUOS = -33,
	LITEST_WACOM_ISDV4 = -34,
	LITEST_WALTOP = -35,
};

enum litest_device_feature {
	LITEST_DISABLE_DEVICE = -1,
	LITEST_ANY = 0,
	LITEST_TOUCHPAD = 1 << 0,
	LITEST_CLICKPAD = 1 << 1,
	LITEST_BUTTON = 1 << 2,
	LITEST_KEYS = 1 << 3,
	LITEST_RELATIVE = 1 << 4,
	LITEST_WHEEL = 1 << 5,
	LITEST_TOUCH = 1 << 6,
	LITEST_SINGLE_TOUCH = 1 << 7,
	LITEST_APPLE_CLICKPAD = 1 << 8,
	LITEST_TOPBUTTONPAD = 1 << 9,
	LITEST_SEMI_MT = 1 << 10,
	LITEST_POINTINGSTICK = 1 << 11,
	LITEST_FAKE_MT = 1 << 12,
	LITEST_ABSOLUTE = 1 << 13,
	LITEST_PROTOCOL_A = 1 << 14,
	LITEST_HOVER = 1 << 15,
	LITEST_ELLIPSE = 1 << 16,
	LITEST_TABLET = 1 << 17,
	LITEST_DISTANCE = 1 << 18,
	LITEST_TOOL_SERIAL = 1 << 19,
};

struct litest_device {
	struct libevdev *evdev;
	struct libevdev_uinput *uinput;
	struct libinput *libinput;
	bool owns_context;
	struct libinput_device *libinput_device;
	struct litest_device_interface *interface;

	int ntouches_down;
	bool skip_ev_syn;

	void *private; /* device-specific data */

	char *udev_rule_file;
};

struct axis_replacement {
	int32_t evcode;
	int32_t value;
};

/* A loop range, resolves to:
   for (i = lower; i < upper; i++)
 */
struct range {
	int lower; /* inclusive */
	int upper; /* exclusive */
};

struct libinput *litest_create_context(void);
void litest_disable_log_handler(struct libinput *libinput);
void litest_restore_log_handler(struct libinput *libinput);

void
litest_fail_condition(const char *file,
		      int line,
		      const char *func,
		      const char *condition,
		      const char *message,
		      ...);
void
litest_fail_comparison_int(const char *file,
			   int line,
			   const char *func,
			   const char *operator,
			   int a,
			   int b,
			   const char *astr,
			   const char *bstr);
void
litest_fail_comparison_ptr(const char *file,
			   int line,
			   const char *func,
			   const char *comparison);

#define litest_add(name_, func_, ...) \
	_litest_add(name_, #func_, func_, __VA_ARGS__)
#define litest_add_ranged(name_, func_, ...) \
	_litest_add_ranged(name_, #func_, func_, __VA_ARGS__)
#define litest_add_for_device(name_, func_, ...) \
	_litest_add_for_device(name_, #func_, func_, __VA_ARGS__)
#define litest_add_ranged_for_device(name_, func_, ...) \
	_litest_add_ranged_for_device(name_, #func_, func_, __VA_ARGS__)
#define litest_add_no_device(name_, func_) \
	_litest_add_no_device(name_, #func_, func_)
#define litest_add_ranged_no_device(name_, func_, ...) \
	_litest_add_ranged_no_device(name_, #func_, func_, __VA_ARGS__)
void _litest_add(const char *name,
		 const char *funcname,
		 void *func,
		 enum litest_device_feature required_feature,
		 enum litest_device_feature excluded_feature);
void _litest_add_ranged(const char *name,
			const char *funcname,
			void *func,
			enum litest_device_feature required,
			enum litest_device_feature excluded,
			const struct range *range);
void _litest_add_for_device(const char *name,
			    const char *funcname,
			    void *func,
			    enum litest_device_type type);
void _litest_add_ranged_for_device(const char *name,
				   const char *funcname,
				   void *func,
				   enum litest_device_type type,
				   const struct range *range);
void _litest_add_no_device(const char *name,
			   const char *funcname,
			   void *func);
void _litest_add_ranged_no_device(const char *name,
				  const char *funcname,
				  void *func,
				  const struct range *range);

extern void litest_setup_tests(void);
struct litest_device * litest_create_device(enum litest_device_type which);
struct litest_device * litest_add_device(struct libinput *libinput,
					 enum litest_device_type which);
struct libevdev_uinput *
litest_create_uinput_device_from_description(const char *name,
					     const struct input_id *id,
					     const struct input_absinfo *abs,
					     const int *events);
struct litest_device *
litest_create_device_with_overrides(enum litest_device_type which,
				    const char *name_override,
				    struct input_id *id_override,
				    const struct input_absinfo *abs_override,
				    const int *events_override);
struct litest_device *
litest_add_device_with_overrides(struct libinput *libinput,
				 enum litest_device_type which,
				 const char *name_override,
				 struct input_id *id_override,
				 const struct input_absinfo *abs_override,
				 const int *events_override);

struct litest_device *litest_current_device(void);
void litest_delete_device(struct litest_device *d);
int litest_handle_events(struct litest_device *d);

void litest_event(struct litest_device *t,
		  unsigned int type,
		  unsigned int code,
		  int value);
int litest_auto_assign_value(struct litest_device *d,
			     const struct input_event *ev,
			     int slot, double x, double y,
			     struct axis_replacement *axes,
			     bool touching);
void litest_touch_up(struct litest_device *d, unsigned int slot);
void litest_touch_move(struct litest_device *d,
		       unsigned int slot,
		       double x,
		       double y);
void litest_touch_move_extended(struct litest_device *d,
				unsigned int slot,
				double x,
				double y,
				struct axis_replacement *axes);
void litest_touch_down(struct litest_device *d,
		       unsigned int slot,
		       double x,
		       double y);
void litest_touch_down_extended(struct litest_device *d,
				unsigned int slot,
				double x,
				double y,
				struct axis_replacement *axes);
void litest_touch_move_to(struct litest_device *d,
			  unsigned int slot,
			  double x_from, double y_from,
			  double x_to, double y_to,
			  int steps, int sleep_ms);
void litest_touch_move_two_touches(struct litest_device *d,
				   double x0, double y0,
				   double x1, double y1,
				   double dx, double dy,
				   int steps, int sleep_ms);
void litest_touch_move_three_touches(struct litest_device *d,
				     double x0, double y0,
				     double x1, double y1,
				     double x2, double y2,
				     double dx, double dy,
				     int steps, int sleep_ms);

void litest_tablet_proximity_in(struct litest_device *d,
				int x, int y,
				struct axis_replacement *axes);
void litest_tablet_proximity_out(struct litest_device *d);
void litest_tablet_motion(struct litest_device *d,
			  int x, int y,
			  struct axis_replacement *axes);

void litest_hover_start(struct litest_device *d,
			unsigned int slot,
			double x,
			double y);
void litest_hover_end(struct litest_device *d, unsigned int slot);
void litest_hover_move(struct litest_device *d,
		       unsigned int slot,
		       double x,
		       double y);
void litest_hover_move_to(struct litest_device *d,
			  unsigned int slot,
			  double x_from, double y_from,
			  double x_to, double y_to,
			  int steps, int sleep_ms);
void litest_hover_move_two_touches(struct litest_device *d,
				   double x0, double y0,
				   double x1, double y1,
				   double dx, double dy,
				   int steps, int sleep_ms);
void litest_button_click(struct litest_device *d,
			 unsigned int button,
			 bool is_press);
void litest_button_scroll(struct litest_device *d,
			 unsigned int button,
			 double dx, double dy);
void litest_keyboard_key(struct litest_device *d,
			 unsigned int key,
			 bool is_press);
void litest_wait_for_event(struct libinput *li);
void litest_wait_for_event_of_type(struct libinput *li, ...);
void litest_drain_events(struct libinput *li);
void litest_assert_empty_queue(struct libinput *li);
struct libinput_event_pointer * litest_is_button_event(
		       struct libinput_event *event,
		       unsigned int button,
		       enum libinput_button_state state);
struct libinput_event_pointer * litest_is_axis_event(
		       struct libinput_event *event,
		       enum libinput_pointer_axis axis,
		       enum libinput_pointer_axis_source source);
struct libinput_event_pointer * litest_is_motion_event(
		       struct libinput_event *event);
struct libinput_event_touch * litest_is_touch_event(
		       struct libinput_event *event,
		       enum libinput_event_type type);
struct libinput_event_keyboard * litest_is_keyboard_event(
		       struct libinput_event *event,
		       unsigned int key,
		       enum libinput_key_state state);
struct libinput_event_gesture * litest_is_gesture_event(
		       struct libinput_event *event,
		       enum libinput_event_type type,
		       int nfingers);
struct libinput_event_tablet_tool * litest_is_tablet_event(
		       struct libinput_event *event,
		       enum libinput_event_type type);

void litest_assert_button_event(struct libinput *li,
				unsigned int button,
				enum libinput_button_state state);
void litest_assert_scroll(struct libinput *li,
			  enum libinput_pointer_axis axis,
			  int minimum_movement);
void litest_assert_only_typed_events(struct libinput *li,
				     enum libinput_event_type type);
void litest_assert_tablet_button_event(struct libinput *li,
				       unsigned int button,
				       enum libinput_button_state state);

struct libevdev_uinput * litest_create_uinput_device(const char *name,
						     struct input_id *id,
						     ...);
struct libevdev_uinput * litest_create_uinput_abs_device(const char *name,
							 struct input_id *id,
							 const struct input_absinfo *abs,
							 ...);
#define litest_assert_double_eq(a_, b_)\
	ck_assert_int_eq((int)((a_) * 256), (int)((b_) * 256))

#define litest_assert_double_ne(a_, b_)\
	ck_assert_int_ne((int)((a_) * 256), (int)((b_) * 256))

#define litest_assert_double_lt(a_, b_)\
	ck_assert_int_lt((int)((a_) * 256), (int)((b_) * 256))

#define litest_assert_double_le(a_, b_)\
	ck_assert_int_le((int)((a_) * 256), (int)((b_) * 256))

#define litest_assert_double_gt(a_, b_)\
	ck_assert_int_gt((int)((a_) * 256), (int)((b_) * 256))

#define litest_assert_double_ge(a_, b_)\
	ck_assert_int_ge((int)((a_) * 256), (int)((b_) * 256))

void litest_timeout_tap(void);
void litest_timeout_tapndrag(void);
void litest_timeout_softbuttons(void);
void litest_timeout_buttonscroll(void);
void litest_timeout_edgescroll(void);
void litest_timeout_finger_switch(void);
void litest_timeout_middlebutton(void);
void litest_timeout_dwt_short(void);
void litest_timeout_dwt_long(void);
void litest_timeout_gesture(void);

void litest_push_event_frame(struct litest_device *dev);
void litest_pop_event_frame(struct litest_device *dev);

/* this is a semi-mt device, so we keep track of the touches that the tests
 * send and modify them so that the first touch is always slot 0 and sends
 * the top-left of the bounding box, the second is always slot 1 and sends
 * the bottom-right of the bounding box.
 * Lifting any of two fingers terminates slot 1
 */
struct litest_semi_mt {
	int tracking_id;
	/* The actual touches requested by the test for the two slots
	 * in the 0..100 range used by litest */
	struct {
		double x, y;
	} touches[2];
};

void litest_semi_mt_touch_down(struct litest_device *d,
			       struct litest_semi_mt *semi_mt,
			       unsigned int slot,
			       double x, double y);
void litest_semi_mt_touch_move(struct litest_device *d,
			       struct litest_semi_mt *semi_mt,
			       unsigned int slot,
			       double x, double y);
void litest_semi_mt_touch_up(struct litest_device *d,
			     struct litest_semi_mt *semi_mt,
			     unsigned int slot);

#ifndef ck_assert_notnull
#define ck_assert_notnull(ptr) ck_assert_ptr_ne(ptr, NULL)
#endif

static inline void
litest_enable_tap(struct libinput_device *device)
{
	enum libinput_config_status status, expected;

	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	status = libinput_device_config_tap_set_enabled(device,
							LIBINPUT_CONFIG_TAP_ENABLED);

	litest_assert_int_eq(status, expected);
}

static inline void
litest_disable_tap(struct libinput_device *device)
{
	enum libinput_config_status status, expected;

	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	status = libinput_device_config_tap_set_enabled(device,
							LIBINPUT_CONFIG_TAP_DISABLED);

	litest_assert_int_eq(status, expected);
}

static inline bool
litest_has_2fg_scroll(struct litest_device *dev)
{
	struct libinput_device *device = dev->libinput_device;

	return !!(libinput_device_config_scroll_get_methods(device) &
		  LIBINPUT_CONFIG_SCROLL_2FG);
}

static inline void
litest_enable_2fg_scroll(struct litest_device *dev)
{
	enum libinput_config_status status, expected;
	struct libinput_device *device = dev->libinput_device;

	status = libinput_device_config_scroll_set_method(device,
					  LIBINPUT_CONFIG_SCROLL_2FG);

	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	litest_assert_int_eq(status, expected);
}

static inline void
litest_enable_edge_scroll(struct litest_device *dev)
{
	enum libinput_config_status status, expected;
	struct libinput_device *device = dev->libinput_device;

	status = libinput_device_config_scroll_set_method(device,
					  LIBINPUT_CONFIG_SCROLL_EDGE);

	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	litest_assert_int_eq(status, expected);
}

static inline void
litest_enable_clickfinger(struct litest_device *dev)
{
	enum libinput_config_status status, expected;
	struct libinput_device *device = dev->libinput_device;

	status = libinput_device_config_click_set_method(device,
				 LIBINPUT_CONFIG_CLICK_METHOD_CLICKFINGER);
	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	litest_assert_int_eq(status, expected);
}

static inline void
litest_enable_buttonareas(struct litest_device *dev)
{
	enum libinput_config_status status, expected;
	struct libinput_device *device = dev->libinput_device;

	status = libinput_device_config_click_set_method(device,
				 LIBINPUT_CONFIG_CLICK_METHOD_BUTTON_AREAS);
	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	litest_assert_int_eq(status, expected);
}

static inline int
litest_is_synaptics_semi_mt(struct litest_device *dev)
{
	struct libevdev *evdev = dev->evdev;

	return libevdev_has_property(evdev, INPUT_PROP_SEMI_MT) &&
		libevdev_get_id_vendor(evdev) == 0x2 &&
		libevdev_get_id_product(evdev) == 0x7;
}

static inline void
litest_enable_drag_lock(struct libinput_device *device)
{
	enum libinput_config_status status, expected;

	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	status = libinput_device_config_tap_set_drag_lock_enabled(device,
								  LIBINPUT_CONFIG_DRAG_LOCK_ENABLED);

	litest_assert_int_eq(status, expected);
}

static inline void
litest_disable_drag_lock(struct libinput_device *device)
{
	enum libinput_config_status status, expected;

	expected = LIBINPUT_CONFIG_STATUS_SUCCESS;
	status = libinput_device_config_tap_set_drag_lock_enabled(device,
								  LIBINPUT_CONFIG_DRAG_LOCK_DISABLED);

	litest_assert_int_eq(status, expected);
}

#define CK_DOUBLE_EQ_EPSILON 1E-3
#define ck_assert_double_eq(X,Y)  \
	do { \
		double _ck_x = X; \
		double _ck_y = Y; \
		ck_assert_msg(fabs(_ck_x - _ck_y) < CK_DOUBLE_EQ_EPSILON, \
			      "Assertion '" #X " == " #Y \
			      "' failed: "#X"==%f, "#Y"==%f", \
			      _ck_x, \
			      _ck_y); \
	} while (0)

#define ck_assert_double_ne(X,Y)  \
	do { \
		double _ck_x = X; \
		double _ck_y = Y; \
		ck_assert_msg(fabs(_ck_x - _ck_y) > CK_DOUBLE_EQ_EPSILON, \
			      "Assertion '" #X " != " #Y \
			      "' failed: "#X"==%f, "#Y"==%f", \
			      _ck_x, \
			      _ck_y); \
	} while (0)

#define _ck_assert_double_eq(X, OP, Y)  \
	do { \
		double _ck_x = X; \
		double _ck_y = Y; \
		ck_assert_msg(_ck_x OP _ck_y || \
			      fabs(_ck_x - _ck_y) < CK_DOUBLE_EQ_EPSILON, \
			      "Assertion '" #X#OP#Y \
			      "' failed: "#X"==%f, "#Y"==%f", \
			      _ck_x, \
			      _ck_y); \
	} while (0)

#define _ck_assert_double_ne(X, OP,Y) \
	do { \
		double _ck_x = X; \
		double _ck_y = Y; \
		ck_assert_msg(_ck_x OP _ck_y && \
			      fabs(_ck_x - _ck_y) > CK_DOUBLE_EQ_EPSILON, \
			      "Assertion '" #X#OP#Y \
			      "' failed: "#X"==%f, "#Y"==%f", \
			      _ck_x, \
			      _ck_y); \
	} while (0)
#define ck_assert_double_lt(X, Y) _ck_assert_double_ne(X, <, Y)
#define ck_assert_double_le(X, Y) _ck_assert_double_eq(X, <=, Y)
#define ck_assert_double_gt(X, Y) _ck_assert_double_ne(X, >, Y)
#define ck_assert_double_ge(X, Y) _ck_assert_double_eq(X, >=, Y)
#endif /* LITEST_H */