feat(platform): add linux mouse driver

Author: lc-soft

include/LCUI/platform/linux/linux_mouse.h

@@ -2,7 +2,7 @@
  * linux_mouse.h -- Mouse support for linux.
  *
  * Copyright (c) 2018, Liu chao <lc-soft@live.cn> All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
@@ -35,8 +35,8 @@
 #include <LCUI/platform/linux/linux_x11mouse.h>
 #endif
 
-void LCUI_InitLinuxMouse( void );
+void LCUI_InitLinuxMouse(void);
 
-void LCUI_ExitLinuxMouse( void );
+void LCUI_FreeLinuxMouse(void);
 
 #endif

src/platform/linux/linux_mouse.c

@@ -2,7 +2,7 @@
  * linux_mouse.c -- Mouse support for linux.
  *
  * Copyright (c) 2018, Liu chao <lc-soft@live.cn> All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
@@ -28,32 +28,165 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-
 #include <LCUI_Build.h>
 #ifdef LCUI_BUILD_IN_LINUX
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <linux/input.h>
+
 #include <LCUI/LCUI.h>
+#include <LCUI/thread.h>
 #include <LCUI/platform.h>
+#include <LCUI/display.h>
 #include LCUI_EVENTS_H
 #include LCUI_MOUSE_H
 
-void LCUI_InitLinuxMouse( void )
+enum MouseButtonId { MOUSE_BUTTON_LEFT = 1, MOUSE_BUTTON_RIGHT = 1 << 1 };
+
+static struct LCUI_LinuxMouseDriver {
+	int x;
+	int y;
+	int button_state[2];
+
+	int dev_fd;
+	const char *dev_path;
+
+	LCUI_Thread tid;
+	LCUI_BOOL active;
+} mouse;
+
+static void DispathMouseButtonEvent(int button, int state)
+{
+	LCUI_SysEventRec ev = { 0 };
+	if (mouse.button_state[button - 1]) {
+		if (!(state & button)) {
+			ev.type = LCUI_MOUSEUP;
+			ev.button.x = mouse.x;
+			ev.button.y = mouse.y;
+			ev.button.button = button;
+			mouse.button_state[button - 1] = 0;
+			LCUI_TriggerEvent(&ev, NULL);
+			LCUI_DestroyEvent(&ev);
+		}
+	} else if (state & button) {
+		ev.type = LCUI_MOUSEDOWN;
+		ev.button.x = mouse.x;
+		ev.button.y = mouse.y;
+		ev.button.button = button;
+		mouse.button_state[button - 1] = 1;
+		LCUI_TriggerEvent(&ev, NULL);
+		LCUI_DestroyEvent(&ev);
+	}
+}
+
+static void DispatchMouseEvent(void *arg1, void *arg2)
+{
+	char *buf = arg1;
+	int state = buf[0] & 0x07;
+	LCUI_SysEventRec ev = { 0 };
+
+	mouse.x += buf[1];
+	mouse.y -= buf[2];
+	mouse.x = max(0, mouse.x);
+	mouse.y = max(0, mouse.y);
+	mouse.x = min(LCUIDisplay_GetWidth(), mouse.x);
+	mouse.y = min(LCUIDisplay_GetHeight(), mouse.y);
+	ev.type = LCUI_MOUSEMOVE;
+	ev.motion.x = mouse.x;
+	ev.motion.y = mouse.y;
+	ev.motion.xrel = buf[1];
+	ev.motion.yrel = -buf[2];
+	LCUI_TriggerEvent(&ev, NULL);
+	LCUI_DestroyEvent(&ev);
+	DispathMouseButtonEvent(MOUSE_BUTTON_LEFT, state);
+	DispathMouseButtonEvent(MOUSE_BUTTON_RIGHT, state);
+}
+
+static void LinuxMouseThread(void *arg)
+{
+	char buf[6];
+	fd_set readfds;
+	struct timeval tv;
+	LCUI_TaskRec task = { 0 };
+
+	mouse.active = TRUE;
+	task.func = DispatchMouseEvent;
+	task.destroy_arg[0] = free;
+	while (mouse.active) {
+		tv.tv_sec = 0;
+		tv.tv_usec = 500000;
+
+		FD_ZERO(&readfds);
+		FD_SET(mouse.dev_fd, &readfds);
+		select(mouse.dev_fd + 1, &readfds, NULL, NULL, &tv);
+		if (FD_ISSET(mouse.dev_fd, &readfds)) {
+			if (read(mouse.dev_fd, buf, 6) <= 0) {
+				continue;
+			}
+			task.arg[0] = malloc(sizeof(char) * 6);
+			if (!task.arg[0]) {
+				perror("[input] mouse driver");
+				continue;
+			}
+			memcpy(task.arg[0], buf, sizeof(char) * 6);
+			LCUI_PostTask(&task);
+		}
+	}
+}
+
+static int InitLinuxMouse(void)
+{
+	mouse.x = LCUIDisplay_GetWidth() / 2;
+	mouse.y = LCUIDisplay_GetHeight() / 2;
+	mouse.dev_path = getenv("LCUI_MOUSE_DEVICE");
+	if (!mouse.dev_path) {
+		mouse.dev_path = "/dev/input/mice";
+	}
+	LOG("[input] open mouse device: %s\n", mouse.dev_path);
+	if ((mouse.dev_fd = open(mouse.dev_path, O_RDONLY)) < 0) {
+		perror("[input] open mouse device failed");
+		return -1;
+	}
+	LCUIThread_Create(&mouse.tid, LinuxMouseThread, NULL);
+	LOG("[input] mouse driver thread: %lld\n", mouse.tid);
+	return 0;
+}
+
+static void FreeLinuxMouse(void)
+{
+	if (mouse.active) {
+		mouse.active = FALSE;
+		LCUIThread_Join(mouse.tid, NULL);
+		close(mouse.dev_fd);
+	}
+}
+
+void LCUI_InitLinuxMouse(void)
 {
 #ifdef LCUI_VIDEO_DRIVER_X11
-	LCUI_BOOL is_x11_mode = TRUE;
-	if( is_x11_mode ) {
+	if (LCUI_GetAppId() == LCUI_APP_LINUX_X11) {
 		LCUI_InitLinuxX11Mouse();
+		return;
 	}
 #endif
+	InitLinuxMouse();
 }
 
-void LCUI_ExitLinuxMouse( void )
+void LCUI_FreeLinuxMouse(void)
 {
 #ifdef LCUI_VIDEO_DRIVER_X11
-	LCUI_BOOL is_x11_mode = TRUE;
-	if( is_x11_mode ) {
-		LCUI_ExitLinuxX11Mouse();
+	if (LCUI_GetAppId() == LCUI_APP_LINUX_X11) {
+		LCUI_FreeLinuxX11Mouse();
+		return;
 	}
 #endif
+	FreeLinuxMouse();
 }
 
 #endif