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/*

splash.h
Atom user-friendly loading screen.

When kernel debugging is disabled, a more
user-friendly loading screen (known as a splash
screen) is displayed to let the user know that
something is happening (a black screen may cause
users to lose patience).

*/

#ifndef _SPLASH_H
#define _SPLASH_H

#include <atom/kernel.h>
#include <atom/konsole.h>

#include <config/splash.conf>

#define SLD_XOFF	(80/2)-(SLD_WIDTH/2)
#define	SLD_XEND	(80/2)+(SLD_WIDTH/2)

typedef struct splash_action_struct
{
	void (*callback)(int);
	int arg;
} splash_action_t;

double splash_single_len;

double splash_count_actions(splash_action_t actions[])
{
	double count=0;
	int i=0;
	while (1)
	{
		if (actions[i++].callback == NULL) return count;
		else count += 1.0;
	};
};

void splash_draw_bar(int x, int y, int width, u8int attr)
{
	unsigned char * vidmem = (unsigned char *) 0xb8000;
	int loc = (((y * width) + x) * 2) + 1;
	printdec(loc);
	while (width--)
	{
		vidmem[loc] = attr;
		loc += 2;
	};
	putk(' ');
};

void splash_init(splash_action_t actions[])
{
	konsole_clear(SLD_ATTR);
	splash_single_len = (1.0/splash_count_actions(actions))*((float)SLD_WIDTH);
	int textoff = (80/2)-(strlen(SLD_MSG)/2);
	konsole_status.x = textoff;
	konsole_status.y = 18;
	printk(SLD_MSG);
	splash_draw_bar(SLD_XOFF, 80, SLD_WIDTH, SLD_BACK);

	int i;
	double barwidth=0;
	for (i=0; i<splash_count_actions(actions); i++)
	{
		splash_draw_bar(SLD_XOFF, 80, barwidth, SLD_COLOR);
		actions[i].callback(actions[i].arg);
		barwidth += splash_single_len;
	};
};

#endif

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splash_draw_bar(SLD_XOFF, 80, barwidth, SLD_COLOR);