Mon 14 Oct 23:06:38 CEST 2024
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kernel/console.c
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217
kernel/console.c
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/*
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Copyright (C) 2015-2019 The University of Notre Dame
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This software is distributed under the GNU General Public License.
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See the file LICENSE for details.
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*/
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#include "console.h"
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#include "serial.h"
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#include "graphics.h"
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#include "kmalloc.h"
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#include "string.h"
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struct console {
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struct window *window;
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struct graphics *gx;
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int xsize;
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int ysize;
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int xpos;
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int ypos;
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int onoff;
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int refcount;
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};
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struct console console_root = {0};
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static struct graphics_color bgcolor = { 0, 0, 0 };
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static struct graphics_color fgcolor = { 255, 255, 255 };
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struct console * console_create_root()
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{
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console_root.window = window_create_root();
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console_root.gx = window_graphics(console_root.window);
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console_reset(&console_root);
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console_putstring(&console_root,"\nconsole: initialized\n");
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return &console_root;
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}
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void console_reset( struct console *d )
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{
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if(!d || !d->gx) return;
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d->xpos = d->ypos = 0;
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d->xsize = graphics_width(d->gx) / 8;
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d->ysize = graphics_height(d->gx) / 8;
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d->onoff = 0;
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graphics_fgcolor(d->gx, fgcolor);
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graphics_bgcolor(d->gx, bgcolor);
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graphics_clear(d->gx, 0, 0, graphics_width(d->gx), graphics_height(d->gx));
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}
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void console_heartbeat( struct console *d )
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{
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char c = d->onoff ? ' ' : '_';
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graphics_char(d->gx, d->xpos * 8, d->ypos * 8, c );
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d->onoff = !d->onoff;
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}
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int console_post( struct console *c, const char *data, int size )
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{
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int total = 0;
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struct event e;
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e.type = EVENT_KEY_DOWN;
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e.x = 0;
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e.y = 0;
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while(size>0) {
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e.code = *data;
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window_post_events(c->window,&e,sizeof(e));
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size--;
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data++;
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total++;
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}
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return total;
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}
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int console_write( struct console *d, const char *data, int size )
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{
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graphics_char(d->gx, d->xpos * 8, d->ypos * 8, ' ');
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int i;
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for(i = 0; i < size; i++) {
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char c = data[i];
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switch (c) {
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case 13:
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case 10:
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d->xpos = 0;
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d->ypos++;
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break;
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case '\f':
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d->xpos = d->ypos = 0;
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d->xsize = graphics_width(d->gx) / 8;
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d->ysize = graphics_height(d->gx) / 8;
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graphics_fgcolor(d->gx, fgcolor);
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graphics_bgcolor(d->gx, bgcolor);
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graphics_clear(d->gx, 0, 0, graphics_width(d->gx), graphics_height(d->gx));
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break;
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case '\b':
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d->xpos--;
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break;
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default:
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graphics_char(d->gx, d->xpos * 8, d->ypos * 8, c);
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d->xpos++;
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break;
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}
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if(d->xpos < 0) {
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d->xpos = d->xsize - 1;
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d->ypos--;
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}
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if(d->xpos >= d->xsize) {
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d->xpos = 0;
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d->ypos++;
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}
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if(d->ypos >= d->ysize) {
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d->xpos = d->ypos = 0;
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d->xsize = graphics_width(d->gx) / 8;
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d->ysize = graphics_height(d->gx) / 8;
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graphics_fgcolor(d->gx, fgcolor);
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graphics_bgcolor(d->gx, bgcolor);
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graphics_clear(d->gx, 0, 0, graphics_width(d->gx), graphics_height(d->gx));
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}
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}
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graphics_char(d->gx, d->xpos * 8, d->ypos * 8, '_');
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return i;
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}
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int console_read( struct console *c, char *data, int length )
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{
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int total=0;
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struct event e;
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while(length>0 && window_read_events(c->window,&e,sizeof(e))) {
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if(e.type==EVENT_KEY_DOWN) {
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*data = e.code;
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length--;
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total++;
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data++;
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}
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}
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return total;
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}
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int console_read_nonblock( struct console *c, char *data, int length )
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{
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int total=0;
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struct event e;
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while(length>0 && window_read_events_nonblock(c->window,&e,sizeof(e))) {
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if(e.type==EVENT_KEY_DOWN) {
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*data = e.code;
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length--;
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total++;
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data++;
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}
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}
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return total;
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}
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int console_getchar( struct console *c )
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{
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char ch;
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if(console_read(c,&ch,1)>0) {
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return ch;
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} else {
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return 0;
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}
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}
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void console_putchar( struct console *c, char ch )
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{
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console_write(c,&ch,1);
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}
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void console_putstring( struct console *c, const char *str)
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{
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console_write(c,str,strlen(str));
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}
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struct console *console_create( struct window *w )
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{
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struct console *c = kmalloc(sizeof(*c));
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c->window = window_addref(w);
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c->gx = window_graphics(w);
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c->refcount = 1;
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console_reset(c);
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return c;
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}
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struct console *console_addref( struct console *c )
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{
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c->refcount++;
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return c;
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}
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void console_delete( struct console *c )
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{
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if(c==&console_root) return;
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c->refcount--;
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if(c->refcount==0) {
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window_delete(c->window);
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kfree(c);
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}
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}
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void console_size( struct console *c, int *xsize, int *ysize )
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{
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*xsize = c->xsize;
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*ysize = c->ysize;
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}
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