add: color cmd

headers/terminal.h

@@ -16,6 +16,7 @@ struct screen {
 	size_t column;
 	uint8_t color;
 	uint16_t buffer[VGA_WIDTH * VGA_HEIGHT];
+	uint8_t default_color;
 	char line[256];
 };
 
@@ -53,3 +54,7 @@ struct key_event terminal_getkey(void);
 void update_cursor(void);
 void move_cursor(int direction);
 void set_color_level(int level);
+void terminal_set_default_fg_color(uint8_t fg_color);
+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);

src/shell/commands/color_cmd.c

@@ -0,0 +1,36 @@
+#include "kprintf.h"
+#include "string.h"
+#include "terminal.h"
+#include <stdint.h>
+
+#define ARRAY_SIZE(array) sizeof(array) / sizeof(array[0])
+
+void color_cmd(char *arg)
+{
+	uint8_t tmp_color;
+	static const char *colors[] = {
+	    "BLACK",     "BLUE",          "GREEN",        "CYAN",
+	    "RED",       "MAGENTA",       "BROWN",        "LIGHT_GREY",
+	    "DARK_GREY", "LIGHT_BLUE",    "LIGHT_GREEN",  "LIGHT_CYAN",
+	    "LIGHT_RED", "LIGHT_MAGENTA", "LIGHT_YELLOW", "WHITE",
+	};
+	for (size_t i = 0; i < ARRAY_SIZE(colors); i++) {
+		if (strcmp(colors[i], arg) == 0) {
+			terminal_change_default_fg_color(i);
+			return;
+		}
+	}
+	tmp_color = terminal_get_default_color();
+	kprintf(KERN_WARNING "Invalid argument\navailable color: ");
+	for (size_t i = 0; i < ARRAY_SIZE(colors); i++) {
+		terminal_set_default_fg_color(i);
+		// Unai the STRING MERGE argument of kprintf cause me a
+		// cramptissue. I lost all my skibidi aura to fix it but it work
+		// (;
+		kprintf(colors[i]);
+		if (i != ARRAY_SIZE(colors) - 1)
+			kprintf(", ");
+	}
+	terminal_set_default_fg_color(tmp_color);
+	kprintf("\n");
+}

src/terminal/put.c

@@ -65,6 +65,21 @@ void terminal_set_color(uint8_t color)
 	screen->color = color;
 }
 
+void terminal_set_default_fg_color(uint8_t fg_color)
+{
+	screen->default_color = (screen->default_color & 0xF0) | fg_color;
+}
+
+void terminal_set_default_bg_color(uint8_t bg_color)
+{
+	screen->default_color = bg_color << 4 | (screen->default_color & 0x0F);
+}
+
+uint8_t terminal_get_default_color(void)
+{
+	return screen->default_color;
+}
+
 void terminal_putentryat(char c, uint8_t color, size_t x, size_t y)
 {
 	const size_t index = y * VGA_WIDTH + x;
@@ -87,6 +102,35 @@ static void terminal_new_line(void)
 		terminal_scroll();
 }
 
+static uint8_t get_entry_color(uint16_t vga_entry)
+{
+	return vga_entry >> 8;
+}
+
+void terminal_change_default_color(uint8_t color)
+{
+	terminal_set_color(color);
+	for (size_t y = 0; y < VGA_HEIGHT; y++) {
+		for (size_t x = 0; x < VGA_WIDTH; x++) {
+			const size_t index = y * VGA_WIDTH + x;
+			uint8_t entry_color = get_entry_color(TERM_BUF[index]);
+			TERM_BUF[index] = vga_entry(
+			    TERM_BUF[index],
+			    entry_color == screen->default_color ? color
+								 : entry_color);
+		}
+	}
+	memcpy(screen->buffer, TERM_BUF, sizeof(screen->buffer));
+	screen->default_color = color;
+	screen->color = color;
+}
+
+void terminal_change_default_fg_color(uint8_t fg_color)
+{
+	terminal_set_fg_color(fg_color);
+	terminal_change_default_color(screen->color);
+}
+
 void terminal_clear(void)
 {
 	for (size_t y = 0; y < VGA_HEIGHT; y++) {
@@ -179,7 +223,9 @@ void set_color_level(int level)
 	    VGA_COLOR_LIGHT_BLUE,   VGA_COLOR_GREEN,
 	    VGA_COLOR_LIGHT_GREY};
 
-	if (level == 0)
+	if (level == 0) {
 		terminal_set_color(screen->default_color);
+		return;
+	}
 	terminal_set_fg_color(color_translation[level]);
 }