feat: Populate repo

git/wsserver/examples/vtouchpad/mouse_x11.c

@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2022  Davidson Francis <davidsondfgl@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#if !defined(__linux__) && !defined(__FreeBSD__)
+#error "Expected Linux or FreeBSD here!"
+#endif
+
+#include <X11/Xlib.h>
+#ifdef HAVE_XDOTOOL
+	#include <xdo.h>
+#else
+	#include <X11/extensions/XTest.h>
+#endif
+
+#include "vtouchpad.h"
+
+/**
+ * @dir examples/vtouchpad
+ * @brief Touchpad example directory
+ *
+ * @file mouse_x11.c
+ * @brief Mouse X11 implementation.
+ */
+
+/**
+ * Note:
+ * Although the use of libxdo/xdotool seems unnecessary (since libxdo *also*
+ * uses X11's XTest extension), I believe it can still be interesting: the
+ * xdotool implementation may change in the future, as well as support new
+ * systems, so dealing with libxdo seems to be better than using X11 directly.
+ *
+ * Link:
+ *   If   libxdo present: -lX11 -lxdo
+ *   Else               : -lX11 -lXtst
+ *
+ */
+
+/**
+ * Mouse pointer, hold OS-dependent data structures.
+ */
+struct mouse
+{
+#ifdef HAVE_XDOTOOL
+	xdo_t *xdo;
+#else
+	Display *dpy;
+	Window root;
+#endif
+};
+
+/**
+ * @brief Allocates a new mouse data structure.
+ *
+ * @return Returns a new mouse_t pointer object.
+ */
+mouse_t *mouse_new(void)
+{
+	struct mouse *mouse;
+	mouse = calloc(1, sizeof(struct mouse));
+	if (!mouse)
+		return (NULL);
+#ifdef HAVE_XDOTOOL
+	mouse->xdo  = xdo_new(NULL);
+	if (!mouse->xdo)
+		return mouse_free(mouse);
+#else
+	mouse->dpy  = XOpenDisplay(0);
+	if (!mouse->dpy)
+		return mouse_free(mouse);
+	mouse->root = XRootWindow(mouse->dpy, DefaultScreen(mouse->dpy));
+#endif
+	return (mouse);
+}
+
+/**
+ * @brief Frees a previously allocated mouse_t pointer.
+ *
+ * @return Always NULL.
+ */
+void *mouse_free(mouse_t *mouse)
+{
+	if (!mouse)
+		goto out;
+#ifdef HAVE_XDOTOOL
+	if (mouse->xdo)
+		xdo_free(mouse->xdo);
+#else
+	if (mouse->dpy)
+		XCloseDisplay(mouse->dpy);
+#endif
+	free(mouse);
+out:
+	return (NULL);
+}
+
+/**
+ * @brief Moves the mouse pointed by @p mouse to the
+ * offsets @p x_off and @p y_off.
+ *
+ * @param mouse Mouse structure pointer.
+ * @param x_off X-coordinate offset.
+ * @param y_off Y-coordinate offset.
+ *
+ * @return Returns 0 if success, 1 otherwise.
+ */
+int mouse_move_relative(mouse_t *mouse, int x_off, int y_off)
+{
+#ifdef HAVE_XDOTOOL
+	return xdo_move_mouse_relative(mouse->xdo, x_off, y_off);
+#else
+	int ret;
+	ret = XTestFakeRelativeMotionEvent(mouse->dpy, x_off, y_off, CurrentTime);
+	XFlush(mouse->dpy);
+	return (ret == 0);
+#endif
+}
+
+/**
+ * @brief Makes a 'button press' event according to the
+ * @p mouse pointer and the @p button (left or right).
+ *
+ * @param mouse Mouse structure pointer.
+ * @param button Which button was pressed (either
+ *               MOUSE_BTN_LEFT or MOUSE_BTN_RIGHT).
+ *
+ * @return Returns 0 if success, 1 otherwise.
+ */
+int mouse_down(mouse_t *mouse, int button)
+{
+#ifdef HAVE_XDOTOOL
+	return xdo_mouse_down(mouse->xdo, CURRENTWINDOW, button);
+#else
+	int ret;
+	ret = XTestFakeButtonEvent(mouse->dpy, button, 1, CurrentTime);
+    XFlush(mouse->dpy);
+    return (ret == 0);
+#endif
+}
+
+/**
+ * @brief Makes a 'button release' event according to the
+ * @p mouse pointer and the @p button (left or right).
+ *
+ * @param mouse Mouse structure pointer.
+ * @param button Which button was released (either
+ *               MOUSE_BTN_LEFT or MOUSE_BTN_RIGHT).
+ *
+ * @return Returns 0 if success, 1 otherwise.
+ */
+int mouse_up(mouse_t *mouse, int button)
+{
+#ifdef HAVE_XDOTOOL
+	return xdo_mouse_up(mouse->xdo, CURRENTWINDOW, button);
+#else
+	int ret;
+	ret = XTestFakeButtonEvent(mouse->dpy, button, 0, CurrentTime);
+    XFlush(mouse->dpy);
+    return (ret == 0);
+#endif
+}