#ifndef _plan9_
#include <stdlib.h>
#else
#include <u.h>
#include <libc.h>
#endif
#include <fconfig.h>
#include <filter.h>
#include <fractal.h>
#include <ui_helper.h>
#include <xerror.h>
#include <grlib.h>

static inline void
prepare(struct uih_context *c, char *string, int *xmax, int *nr)
{
    int xm = 0;
    int n = 1;
    int pos = 0;
    int tmp;
    while (1) {
	tmp = 0;
	while (*string != '\n') {
	    if (*string == 0) {
		tmp++;
		if (tmp > xm)
		    xm = tmp;
		*xmax = xm;
		*nr = n;
		return;
	    } else
		tmp += xtextcharw(c->font, *string);
	    if (pos > 255)
		break;
	    string++;
	    pos++;
	}
	tmp++;
	if (tmp > xm)
	    xm = tmp;
	n++;
	if (n > 30) {
	    n = 30;
	    *xmax = tmp;
	    *nr = n;
	    return;
	}
	pos = 0;
	string++;
    }
}

static void
getpos(uih_context * c, int *x, int *y, int *w, int *h, void *data)
{
    int num = (int) data;
    int xmax, nr;
    if (c->text[num] == NULL) {
	*x = *y = *h = *w;
	return;
    }
    prepare(c, c->text[num], &xmax, &nr);
    nr *= xtextheight(c->font);
    switch (num) {
    case 0:
	*y = 0;
	break;
    case 1:
	*y = (c->image->height - nr) / 2;
	break;
    case 2:
	*y = c->image->height - nr;
	break;
    }
    *h = nr;
    switch (c->textpos[num]) {
    case 0:
	*x = 0;
	break;
    case 1:
	*x = (c->image->width - xmax) / 2;
	break;
    case 2:
	*x = c->image->width - xmax;
	break;
    }
    *w = xmax;
}

static void draw(uih_context * c, void *data)
{
    int num = (int) data;
    int flags = 0;
    int xmax, n, nr, i;
    int x = 0, y = 0;
    char *string;
    int fgcolor = 0, bgcolor = 0;
    if (c->text[num] == NULL)
	return;
    prepare(c, c->text[num], &xmax, &n);
    nr = n * xtextheight(c->font);
    switch (c->textcolor[num]) {
    case 0:
	fgcolor = FGCOLOR(c);
	bgcolor = BGCOLOR(c);
	break;
    case 1:
	fgcolor = BGCOLOR(c);
	bgcolor = BGCOLOR(c);
	flags = TEXT_PRESSED;
	break;
    case 2:
	fgcolor = SELCOLOR(c);
	bgcolor = BGCOLOR(c);
	break;
    default:
	x_fatalerror("playtext:unknown color\n");
    }
    if (c->image->flags & AAIMAGE)
	fgcolor = BGCOLOR(c);
    switch (num) {
    case 0:
	y = 0;
	break;
    case 1:
	y = (c->image->height - nr) / 2;
	break;
    case 2:
	y = c->image->height - nr;
	break;
    }
    string = c->text[num];
    for (i = 0; i < n; i++) {
	xmax = xtextwidth(c->font, string);
	switch (c->textpos[num]) {
	case 0:
	    x = 0;
	    break;
	case 1:
	    x = (c->image->width - xmax) / 2;
	    break;
	case 2:
	    x = c->image->width - xmax;
	    break;
	}
	string +=
	    xprint(c->image, c->font, x, y, string,
			    fgcolor, bgcolor,
		   flags) + 1;
	y += xtextheight(c->font);
    }
}

void uih_inittext(uih_context * c)
{
    c->text[0] = c->text[1] = c->text[2] = NULL;
    c->textpos[0] = c->textpos[1] = c->textpos[2] = 0;
    c->textwindow[0] = uih_registerw(c, getpos, draw, (void *) 0, 0);
    c->textwindow[1] = uih_registerw(c, getpos, draw, (void *) 1, 0);
    c->textwindow[2] = uih_registerw(c, getpos, draw, (void *) 2, 0);
}

void uih_destroytext(uih_context * c)
{
    if (c->text[0] != NULL)
	free(c->text[0]), c->text[0] = NULL;
    if (c->text[1] != NULL)
	free(c->text[1]), c->text[1] = NULL;
    if (c->text[2] != NULL)
	free(c->text[2]), c->text[2] = NULL;
    uih_removew(c, c->textwindow[0]);
    uih_removew(c, c->textwindow[1]);
    uih_removew(c, c->textwindow[2]);
}