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// MIT License, Copyright (c) 2020 Marvin Borner
#include <assert.h>
#include <cpu.h>
#include <def.h>
#include <gui.h>
#include <input.h>
#include <list.h>
#include <mem.h>
#include <print.h>
#include <random.h>
#include <sys.h>
#include <vesa.h>
#define MOUSE_SKIP 2 // => Every move % n != 0 gets skipped
static struct vbe vbe;
static struct window direct; // Direct video memory window
static struct window root; // Root window (wallpaper etc.)
static struct window exchange; // Exchange buffer
static struct window cursor; // Cursor bitmap window
static struct window *focused; // The focused window
static struct list *windows; // List of all windows
static int mouse_x = 0;
static int mouse_y = 0;
static struct window *new_window(struct window *win, int x, int y, u16 width, u16 height, int flags)
{
win->x = x;
win->y = y;
win->width = width;
win->height = height;
win->bpp = vbe.bpp;
win->pitch = win->width * (win->bpp >> 3);
win->fb = malloc(height * win->pitch);
win->flags = flags;
return win;
}
static struct window *window_at(int x, int y)
{
if (windows->head && windows->head->data) {
struct node *iterator = windows->head;
do {
struct window *win = iterator->data;
if (win != &root && x >= win->x && x <= win->x + (int)win->width &&
y >= win->y && y <= win->y + (int)win->height) {
return win;
}
} while ((iterator = iterator->next) != NULL);
}
return NULL;
}
static void redraw_all()
{
if (windows->head && windows->head->data) {
struct node *iterator = windows->head;
do {
struct window *win = iterator->data;
if (win != focused)
gui_win_on_win(&exchange, win, win->x, win->y);
} while ((iterator = iterator->next) != NULL);
if (focused)
gui_win_on_win(&exchange, focused, focused->x, focused->y);
memcpy(direct.fb, exchange.fb, exchange.pitch * exchange.height);
}
}
static int mouse_skip = 0;
static int mouse_pressed[3] = { 0 };
static void handle_mouse(struct event_mouse *event)
{
if (event->magic != MOUSE_MAGIC)
return;
// Cursor movement
mouse_x += event->diff_x;
mouse_y -= event->diff_y;
if (mouse_x < 0)
mouse_x = 0;
else if ((int)(mouse_x + cursor.width) > vbe.width - 1)
mouse_x = vbe.width - cursor.width - 1;
if (mouse_y < 0)
mouse_y = 0;
else if ((int)(mouse_y + cursor.height) > vbe.height - 1)
mouse_y = vbe.height - cursor.height - 1;
// Restore cursor buffer backup
gui_copy(&direct, &exchange, cursor.x, cursor.y, cursor.width, cursor.height);
// Window focus
if (!mouse_pressed[0] && !mouse_pressed[1])
focused = window_at(mouse_x, mouse_y);
// Window position
if (event->but1 && !mouse_pressed[1]) {
mouse_pressed[0] = 1;
if (focused && !(focused->flags & WF_NO_DRAG)) {
focused->x = mouse_x;
focused->y = mouse_y;
if (mouse_skip % MOUSE_SKIP == 0) {
mouse_skip = 0;
redraw_all(); // TODO: Function to redraw one window
}
}
} else if (mouse_pressed[0]) {
mouse_pressed[0] = 0;
redraw_all();
}
// Window size
if (event->but2 && !mouse_pressed[0]) {
if (focused && !mouse_pressed[1]) {
mouse_x = focused->x + focused->width;
mouse_y = focused->y + focused->height;
} else if (focused && !(focused->flags & WF_NO_RESIZE) &&
mouse_skip % MOUSE_SKIP == 0) {
mouse_skip = 0;
if (mouse_x - focused->x > 0)
focused->width = mouse_x - focused->x;
if (mouse_y - focused->y > 0)
focused->height = mouse_y - focused->y;
redraw_all(); // TODO: Function to redraw one window
}
mouse_pressed[1] = 1;
} else if (mouse_pressed[1]) {
mouse_pressed[1] = 0;
redraw_all();
}
cursor.x = mouse_x;
cursor.y = mouse_y;
gui_win_on_win(&direct, &cursor, cursor.x, cursor.y);
mouse_skip++;
}
// TODO: Clean this god-function
int main(int argc, char **argv)
{
(void)argc;
vbe = *(struct vbe *)argv[1];
printf("VBE: %dx%d\n", vbe.width, vbe.height);
gui_init("/font/spleen-16x32.psfu");
windows = list_new();
new_window(&root, 0, 0, vbe.width, vbe.height, WF_NO_FOCUS | WF_NO_DRAG | WF_NO_RESIZE);
new_window(&exchange, 0, 0, vbe.width, vbe.height, WF_NO_FOCUS | WF_NO_DRAG | WF_NO_RESIZE);
new_window(&cursor, 0, 0, 32, 32, WF_NO_FOCUS | WF_NO_RESIZE);
memcpy(&direct, &root, sizeof(direct));
direct.fb = vbe.fb;
list_add(windows, &root);
gui_fill(&direct, COLOR_BG);
gui_write(&direct, 0, 0, COLOR_FG, "Welcome to Melvix!");
gui_write(&direct, 0, 32, COLOR_FG, "Loading resources...");
gui_fill(&root, COLOR_BG);
gui_border(&root, COLOR_FG, 2);
gui_load_image(&cursor, "/res/cursor.bmp", 0, 0);
gui_load_wallpaper(&root, "/res/wall.bmp");
redraw_all();
event_register(EVENT_MOUSE);
struct message *msg;
while (1) {
if (!(msg = msg_receive())) {
yield();
continue;
}
switch (msg->type) {
case MSG_NEW_WINDOW:
printf("New window for pid %d\n", msg->src);
struct window *win = msg->data;
int width = win->width ? win->width : 1000;
int height = win->height ? win->height : 800;
int x = win->x ? win->x : vbe.width / 2 - (width / 2);
int y = win->y ? win->y : vbe.height / 2 - (height / 2);
new_window(win, x, y, width, height, win->flags);
msg_send(msg->src, MSG_NEW_WINDOW, win);
list_add(windows, win);
focused = win;
redraw_all();
break;
case MSG_REDRAW:
redraw_all();
break;
case EVENT_MOUSE:
handle_mouse(msg->data);
break;
default:
break;
}
};
return 0;
}
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