add: hold down key && core: create get_key to simplify keyboard usage

headers/keyboard.h

@@ -103,3 +103,5 @@ struct key_event {
 	uint8_t c;
 	uint8_t scan_code;
 };
+
+struct key_event get_key(void);

headers/terminal.h

@@ -59,4 +59,3 @@ void terminal_set_default_bg_color(uint8_t fg_color);
 void terminal_change_default_fg_color(uint8_t color);
 uint8_t terminal_get_default_color(void);
 uint8_t terminal_get_char(int column, int row);
-char *get_line(void);

src/drivers/keyboard.c

@@ -1,53 +1,29 @@
+#include "keyboard.h"
 #include "drivers.h"
 #include "interrupts.h"
 #include "kprintf.h"
 #include "shell.h"
 #include "string.h"
 #include "terminal.h"
+#include <stdbool.h>
 #include <stdint.h>
 
 extern struct screen *screen;
 
-int line_status = READING;
+static bool new_input_indicator = false;
+static struct key_event new_input = {};
 
 void keyboard_handler(struct registers *regs)
 {
-	size_t i = 0;
-	struct key_event ev;
-
-	(void)regs;
-	ev = terminal_getkey();
-	char *buf = screen->line;
-	i = strlen(screen->line);
-	if (ev.c == '\n') {
-		kprintf("\n");
-		screen->line[i] = '\0';
-		line_status = NEWLINE;
-		return;
-	}
-	const size_t size = sizeof(screen->line);
-	if (ev.scan_code == KEY_BACKSPACE && i) {
-		buf[--i] = '\0';
-		move_cursor(LEFT);
-		terminal_putchar(' ');
-		move_cursor(LEFT);
-	} else if (ev.scan_code == KEY_TAB && i) {
-		auto_complete();
-	} else if (ev.c && i < size - 1) {
-		kprintf("%c", ev.c);
-		buf[i++] = ev.c;
-	}
-	if (i >= size) {
-		kprintf("\n");
-		screen->line[i] = '\0';
-		line_status = NEWLINE;
-	}
+	new_input_indicator = true;
+	new_input = terminal_getkey();
 }
 
-char *get_line(void)
+struct key_event get_key(void)
 {
-	while (line_status != NEWLINE)
+
+	while (!new_input_indicator)
 		;
-	line_status = READING;
-	return screen->line;
+	new_input_indicator = false;
+	return new_input;
 }

src/shell/exec.c

@@ -75,11 +75,44 @@ void auto_complete(void)
 	}
 }
 
-void shell_init(void)
+static char *get_line(void)
 {
-	char *line;
+	size_t i = 0;
+	struct key_event ev;
+
+	while (1) {
+		ev = get_key();
+		// kprintf("%d %d\n", ev.scan_code, ev.c);
+		if (ev.c == '\n')
+			break;
+		char *buf = screen->line;
+		i = strlen(screen->line);
+		const size_t size = sizeof(screen->line);
+		if (ev.scan_code) {
+			if (ev.scan_code == KEY_BACKSPACE && i) {
+				buf[--i] = '\0';
+				move_cursor(LEFT);
+				terminal_putchar(' ');
+				move_cursor(LEFT);
+			} else if (ev.scan_code == KEY_TAB && i) {
+				auto_complete();
+			} else if (ev.c && i < size - 1) {
+				kprintf("%c", ev.c);
+				buf[i++] = ev.c;
+			}
+			if (i >= size)
+				break;
+		}
+	}
+	kprintf("\n");
+	screen->line[i] = '\0';
+}
+
+void shell_init()
+{
+	while (1) {
 		kprintf(PROMPT);
-	while ((line = get_line())) {
+		get_line();
 		bool invalid = true;
 		for (unsigned i = 0; i < NB_CMDS; i++) {
 			if (!strncmp(cmds[i].name, screen->line,
@@ -96,6 +129,5 @@ void shell_init(void)
 			kprintf(KERN_WARNING "invalid command: %s\n",
 			        screen->line);
 		memset(screen->line, '\0', sizeof(screen->line));
-		kprintf(PROMPT);
 	}
 }

src/terminal/get.c

@@ -7,7 +7,6 @@
 struct key_event terminal_getkey(void)
 {
 	static bool caps_mode = false;
-	static uint8_t prev_scan_code = 0;
 	struct key_event ev = {0};
 	uint8_t scan_code;
 
@@ -20,13 +19,11 @@ struct key_event terminal_getkey(void)
 	else if (scan_code == KEY_RIGHT_SHIFT + 128 ||
 	         scan_code == KEY_LEFT_SHIFT + 128)
 		caps_mode = false;
-	else if (scan_code != prev_scan_code && prev_scan_code != 0) {
-		if (scan_code < 128 && keymap[scan_code])
+	if (scan_code < 128) {
 		ev.c = keymap[scan_code][caps_mode];
 		if (scan_code >= KEY_F1 && scan_code <= KEY_F10)
 			terminal_set_screen(scan_code - KEY_F1);
-	}
-	prev_scan_code = scan_code;
 		ev.scan_code = scan_code;
+	}
 	return ev;
 }