/*	SCCS Id: @(#)wintext.c	3.3	96/04/05	*/
/* Copyright (c) Dean Luick, 1992				  */
/* NetHack may be freely redistributed.  See license for details. */

/*
 * File for dealing with text windows.
 *
 *	+ No global functions.
 */

#ifndef SYSV
#define PRESERVE_NO_SYSV	/* X11 include files may define SYSV */
#endif

#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
#include <X11/Xos.h>
#include <X11/Xaw/Form.h>
#include <X11/Xaw/AsciiText.h>
#include <X11/Xaw/Cardinals.h>
#include <X11/Xatom.h>

#ifdef PRESERVE_NO_SYSV
# ifdef SYSV
#  undef SYSV
# endif
# undef PRESERVE_NO_SYSV
#endif

#include "hack.h"
#include "winX.h"
#include "xwindow.h"

#ifdef GRAPHIC_TOMBSTONE
#include <X11/xpm.h>
#endif


#define TRANSIENT_TEXT	/* text window is a transient window (no positioning) */

static const char text_translations[] =
    "#override\n\
     <BtnDown>: dismiss_text()\n\
     <Key>: key_dismiss_text()";

#ifdef GRAPHIC_TOMBSTONE
static const char rip_translations[] =
    "#override\n\
     <BtnDown>: rip_dismiss_text()\n\
     <Key>: rip_dismiss_text()";

static Widget FDECL(create_ripout_widget, (Widget));
#endif

/*ARGSUSED*/
void
delete_text(w, event, params, num_params)
    Widget w;
    XEvent *event;
    String *params;
    Cardinal *num_params;
{
    struct xwindow *wp;
    struct text_info_t *text_info;

    wp = find_widget(w);
    text_info = wp->text_information;

    nh_XtPopdown(wp->popup);

    if (text_info->blocked) {
	exit_x_event = TRUE;
    } else if (text_info->destroy_on_ack) {
	destroy_text_window(wp);
    }
}

/*
 * Callback used for all text windows.  The window is poped down on any key
 * or button down event.  It is destroyed if the main nethack code is done
 * with it.
 */
/*ARGSUSED*/
void
dismiss_text(w, event, params, num_params)
    Widget w;
    XEvent *event;
    String *params;
    Cardinal *num_params;
{
    struct xwindow *wp;
    struct text_info_t *text_info;

    wp = find_widget(w);
    text_info = wp->text_information;

    nh_XtPopdown(wp->popup);

    if (text_info->blocked) {
	exit_x_event = TRUE;
    } else if (text_info->destroy_on_ack) {
	destroy_text_window(wp);
    }
}

/* Dismiss when a non-modifier key pressed. */
void
key_dismiss_text(w, event, params, num_params)
    Widget w;
    XEvent *event;
    String *params;
    Cardinal *num_params;
{
    char ch = key_event_to_char((XKeyEvent *) event);
    if (ch) dismiss_text(w, event, params, num_params);
}

#ifdef GRAPHIC_TOMBSTONE
/* Dismiss from clicking on rip image. */
void
rip_dismiss_text(w, event, params, num_params)
    Widget w;
    XEvent *event;
    String *params;
    Cardinal *num_params;
{
    dismiss_text(XtParent(w), event, params, num_params);
}
#endif


/* ARGSUSED */
void
add_to_text_window(wp, attr, str)
    struct xwindow *wp;
    int attr;	/* currently unused */
    const char *str;
{
    struct text_info_t *text_info = wp->text_information;
    int width;

    append_text_buffer(&text_info->text, str, FALSE);

    /* Calculate text width and save longest line */
    width = XTextWidth(text_info->fs, str, (int) strlen(str));
    if (width > text_info->max_width)
	text_info->max_width = width;
}

void
display_text_window(wp, blocking)
    struct xwindow *wp;
    boolean blocking;
{
    struct text_info_t *text_info;
    Arg args[8];
    Cardinal num_args;
    Dimension width, height;
    int nlines;

    text_info = wp->text_information;
    width  = text_info->max_width + text_info->extra_width;
    text_info->blocked = blocking;
    text_info->destroy_on_ack = FALSE;

    /*
     * Calculate the number of lines to use.  First, find the number of
     * lines that would fit on the screen.  Next, remove four of these
     * lines to give room for a possible window manager titlebar (some
     * wm's put a titlebar on transient windows).  Make sure we have
     * _some_ lines.  Finally, use the number of lines in the text if
     * there are fewer than the max.
     */
    nlines = (XtScreen(wp->w)->height - text_info->extra_height) /
			(text_info->fs->ascent + text_info->fs->descent);
    nlines -= 4;

    if (nlines > text_info->text.num_lines)
	nlines = text_info->text.num_lines;
    if (nlines <= 0) nlines = 1;

    /* Font height is ascent + descent. */
    height = (nlines * (text_info->fs->ascent + text_info->fs->descent))
						    + text_info->extra_height;

    num_args = 0;

    if (nlines < text_info->text.num_lines) {
	/* add on width of scrollbar.  Really should look this up,
	 * but can't until the window is realized.  Chicken-and-egg problem.
	 */
	width += 20;
    }

#ifdef GRAPHIC_TOMBSTONE
    if (text_info->is_rip) {
	Widget rip = create_ripout_widget(XtParent(wp->w));
	XtSetArg(args[num_args], XtNfromVert, rip);	num_args++;
    }
#endif

    if (width > (Dimension) XtScreen(wp->w)->width) { /* too wide for screen */
	/* Back off some amount - we really need to back off the scrollbar */
	/* width plus some extra.					   */
	width = XtScreen(wp->w)->width - 20;
    }
    XtSetArg(args[num_args], XtNstring, text_info->text.text);	num_args++;
    XtSetArg(args[num_args], XtNwidth,  width);			num_args++;
    XtSetArg(args[num_args], XtNheight, height);		num_args++;
    XtSetValues(wp->w, args, num_args);

#ifdef TRANSIENT_TEXT
    XtRealizeWidget(wp->popup);
    XSetWMProtocols(XtDisplay(wp->popup), XtWindow(wp->popup),
		    &wm_delete_window, 1);
    positionpopup(wp->popup, FALSE);
#endif

    nh_XtPopup(wp->popup, (int)XtGrabNone, wp->w);

    /* Kludge alert.  Scrollbars are not sized correctly by the Text widget */
    /* if added before the window is displayed, so do it afterward. */
    num_args = 0;
    if (nlines < text_info->text.num_lines) {	/* add vert scrollbar */
	XtSetArg(args[num_args], XtNscrollVertical, XawtextScrollAlways);
								num_args++;
    }
    if (width >= (Dimension) (XtScreen(wp->w)->width-20)) {	/* too wide */
	XtSetArg(args[num_args], XtNscrollHorizontal, XawtextScrollAlways);
								num_args++;
    }
    if (num_args) XtSetValues(wp->w, args, num_args);

    /* We want the user to acknowlege. */
    if (blocking) {
	(void) x_event(EXIT_ON_EXIT);
	nh_XtPopdown(wp->popup);
    }
}


void
create_text_window(wp)
    struct xwindow *wp;
{
    struct text_info_t *text_info;
    Arg args[8];
    Cardinal num_args;
    Position top_margin, bottom_margin, left_margin, right_margin;
    Widget form;

    wp->type = NHW_TEXT;

    wp->text_information = text_info =
		    (struct text_info_t *) alloc(sizeof(struct text_info_t));

    init_text_buffer(&text_info->text);
    text_info->max_width      = 0;
    text_info->extra_width    = 0;
    text_info->extra_height   = 0;
    text_info->blocked	      = FALSE;
    text_info->destroy_on_ack = TRUE;	/* Ok to destroy before display */
#ifdef GRAPHIC_TOMBSTONE
    text_info->is_rip	      = FALSE;
#endif

    num_args = 0;
    XtSetArg(args[num_args], XtNallowShellResize, True); num_args++;
    XtSetArg(args[num_args], XtNtranslations,
		XtParseTranslationTable(text_translations));	num_args++;

#ifdef TRANSIENT_TEXT
    wp->popup = XtCreatePopupShell("text", transientShellWidgetClass,
				   toplevel, args, num_args);
#else
    wp->popup = XtCreatePopupShell("text", topLevelShellWidgetClass,
				   toplevel, args, num_args);
#endif
    XtOverrideTranslations(wp->popup,
	XtParseTranslationTable("<Message>WM_PROTOCOLS: delete_text()"));

    num_args = 0;
    XtSetArg(args[num_args], XtNallowShellResize, True);	num_args++;
    form = XtCreateManagedWidget("form", formWidgetClass, wp->popup,
		args, num_args);

    num_args = 0;
    XtSetArg(args[num_args], XtNdisplayCaret, False);		num_args++;
    XtSetArg(args[num_args], XtNresize, XawtextResizeBoth);	num_args++;
    XtSetArg(args[num_args], XtNtranslations,
		XtParseTranslationTable(text_translations));	num_args++;

    wp->w = XtCreateManagedWidget(
		killer && WIN_MAP == WIN_ERR ?
				  "tombstone" : "text_text", /* name */
		asciiTextWidgetClass,
		form,			/* parent widget */
		args,			/* set some values */
		num_args);		/* number of values to set */

    /* Get the font and margin information. */
    num_args = 0;
    XtSetArg(args[num_args], XtNfont,	      &text_info->fs); num_args++;
    XtSetArg(args[num_args], XtNtopMargin,    &top_margin);    num_args++;
    XtSetArg(args[num_args], XtNbottomMargin, &bottom_margin); num_args++;
    XtSetArg(args[num_args], XtNleftMargin,   &left_margin);   num_args++;
    XtSetArg(args[num_args], XtNrightMargin,  &right_margin);  num_args++;
    XtGetValues(wp->w, args, num_args);

    text_info->extra_width  = left_margin + right_margin;
    text_info->extra_height = top_margin + bottom_margin;
}

void
destroy_text_window(wp)
    struct xwindow *wp;
{
    /* Don't need to pop down, this only called from dismiss_text(). */

    struct text_info_t *text_info = wp->text_information;

    /*
     * If the text window was blocked, then the user has already ACK'ed
     * it and we are free to really destroy the window.  Otherwise, don't
     * destroy until the user dismisses the window via a key or button
     * press.
     */
    if (text_info->blocked || text_info->destroy_on_ack) {
	XtDestroyWidget(wp->popup);
	free_text_buffer(&text_info->text);
	free((genericptr_t)text_info),  wp->text_information = 0;
	wp->type = NHW_NONE;	/* allow reuse */
    } else {
	text_info->destroy_on_ack = TRUE;	/* destroy on next ACK */
    }
}

void
clear_text_window(wp)
    struct xwindow *wp;
{
    clear_text_buffer(&wp->text_information->text);
}


/* text buffer routines ---------------------------------------------------- */

/* Append a line to the text buffer. */
void
append_text_buffer(tb, str, concat)
    struct text_buffer *tb;
    const char *str;
    boolean concat;
{
    char *copy;
    int length;

    if (!tb->text) panic("append_text_buffer:  null text buffer");

    if (str) {
	length = strlen(str);
    } else {
	length = 0;
    }

    if (length + tb->text_last + 1 >= tb->text_size) {
	/* we need to go to a bigger buffer! */
#ifdef VERBOSE
	printf("append_text_buffer: text buffer growing from %d to %d bytes\n",
				tb->text_size, 2*tb->text_size);
#endif
	copy = (char *) alloc((unsigned)tb->text_size*2);
	(void) memcpy(copy, tb->text, tb->text_last);
	free(tb->text);
	tb->text = copy;
	tb->text_size *= 2;
    }

    if (tb->num_lines) {	/* not first --- append a newline */
	char appchar = '\n';

	if(concat && !index("!.?'\")", tb->text[tb->text_last-1])) {
	    appchar = ' ';
	    tb->num_lines--; /* offset increment at end of function */
	}

	*(tb->text + tb->text_last) = appchar;
	tb->text_last++;
    }

    if (str) {
	(void) memcpy((tb->text+tb->text_last), str, length+1);
	if(length) {
	    /* Remove all newlines. Otherwise we have a confused line count. */
	    copy = (tb->text+tb->text_last);
	    while ((copy = index(copy, '\n')) != (char*)0)
		*copy = ' ';
	}

	tb->text_last += length;
    }
    tb->text[tb->text_last] = '\0';
    tb->num_lines++;
}

/* Initialize text buffer. */
void
init_text_buffer(tb)
    struct text_buffer *tb;
{
    tb->text	  = (char *) alloc(START_SIZE);
    tb->text[0]   = '\0';
    tb->text_size = START_SIZE;
    tb->text_last = 0;
    tb->num_lines = 0;
}

/* Empty the text buffer */
void
clear_text_buffer(tb)
    struct text_buffer *tb;
{
    tb->text_last = 0;
    tb->text[0]   = '\0';
    tb->num_lines = 0;
}

/* Free up allocated memory. */
void
free_text_buffer(tb)
    struct text_buffer *tb;
{
    free(tb->text);
    tb->text = (char *) 0;
    tb->text_size = 0;
    tb->text_last = 0;
    tb->num_lines = 0;
}


#ifdef GRAPHIC_TOMBSTONE

static void FDECL(rip_exposed, (Widget,XtPointer,XtPointer));

static XImage* rip_image=0;


#define STONE_LINE_LEN 16	/* # chars that fit on one line */
#define NAME_LINE 0		/* line # for player name */
#define GOLD_LINE 1		/* line # for amount of gold */
#define DEATH_LINE 2		/* line # for death description */
#define YEAR_LINE 6		/* line # for year */

static char rip_line[YEAR_LINE+1][STONE_LINE_LEN+1];

extern const char *killed_by_prefix[];

void
calculate_rip_text(int how)
{
	/* Follows same algorithm as genl_outrip() */

	char buf[BUFSZ];
	char *dpx;
	int line;

	/* Put name on stone */
	Sprintf(rip_line[NAME_LINE], "%s", plname);

	/* Put $ on stone */
	Sprintf(rip_line[GOLD_LINE], "%ld Au", u.ugold);

	/* Put together death description */
	switch (killer_format) {
		default: impossible("bad killer format?");
		case KILLED_BY_AN:
			Strcpy(buf, killed_by_prefix[how]);
			Strcat(buf, an(killer));
			break;
		case KILLED_BY:
			Strcpy(buf, killed_by_prefix[how]);
			Strcat(buf, killer);
			break;
		case NO_KILLER_PREFIX:
			Strcpy(buf, killer);
			break;
	}

	/* Put death type on stone */
	for (line=DEATH_LINE, dpx = buf; line<YEAR_LINE; line++) {
		register int i,i0;
		char tmpchar;

		if ( (i0=strlen(dpx)) > STONE_LINE_LEN) {
			for(i = STONE_LINE_LEN;
			    ((i0 > STONE_LINE_LEN) && i); i--)
				if(dpx[i] == ' ') i0 = i;
			if(!i) i0 = STONE_LINE_LEN;
		}
		tmpchar = dpx[i0];
		dpx[i0] = 0;
		strcpy(rip_line[line], dpx);
		if (tmpchar != ' ') {
			dpx[i0] = tmpchar;
			dpx= &dpx[i0];
		} else  dpx= &dpx[i0+1];
	}

	/* Put year on stone */
	Sprintf(rip_line[YEAR_LINE], "%4d", getyear());
}


/*
 * RIP image expose callback.
 */
/*ARGSUSED*/
static void
rip_exposed(w, client_data, widget_data)
    Widget w;
    XtPointer client_data;	/* unused */
    XtPointer widget_data;	/* expose event from Window widget */
{
    XExposeEvent *event = (XExposeEvent *) widget_data;
    Display* dpy=XtDisplay(w);
    Arg args[8];
    XGCValues values;
    XtGCMask mask;
    GC gc;
    static Pixmap rip_pixmap=None;
    int i, x, y;

    if (!XtIsRealized(w) || event->count > 0) return;

    if (rip_pixmap == None && rip_image) {
	rip_pixmap = XCreatePixmap(dpy, XtWindow(w),
			rip_image->width,
			rip_image->height,
			DefaultDepth(dpy, DefaultScreen(dpy)));
	XPutImage(dpy, rip_pixmap,
		DefaultGC(dpy, DefaultScreen(dpy)),
		rip_image,
		0,0, 0,0,		/* src, dest top left */
		rip_image->width,
		rip_image->height);
	XDestroyImage(rip_image);	/* data bytes free'd also */
    }

    mask = GCFunction | GCForeground | GCGraphicsExposures | GCFont;
    values.graphics_exposures = False;
    XtSetArg(args[0], XtNforeground, &values.foreground);
    XtGetValues(w, args, 1);
    values.function = GXcopy;
    values.font = WindowFont(w);
    gc = XtGetGC(w, mask, &values);

    if (rip_pixmap != None) {
	XCopyArea(dpy, rip_pixmap, XtWindow(w), gc,
		event->x, event->y, event->width, event->height,
		event->x, event->y);
    }

    x=appResources.tombtext_x;
    y=appResources.tombtext_y;
    for (i=0; i<=YEAR_LINE; i++) {
	int len=strlen(rip_line[i]);
	XFontStruct* font=WindowFontStruct(w);
	int width=XTextWidth(font, rip_line[i], len);
	XDrawString(dpy, XtWindow(w), gc,
		x-width/2, y, rip_line[i], len);
	x+=appResources.tombtext_dx;
	y+=appResources.tombtext_dy;
    }

    XtReleaseGC(w, gc);
}

/*
 * The ripout window creation routine.
 */
static Widget
create_ripout_widget(Widget parent)
{
    Widget imageport;
    Arg args[16];
    Cardinal num_args;

    static int rip_width, rip_height;

    if (!rip_image) {
	XpmAttributes attributes;
	int errorcode;

	attributes.valuemask = XpmCloseness;
	attributes.closeness = 65535; /* Try anything */
	errorcode = XpmReadFileToImage(XtDisplay(parent), appResources.tombstone, &rip_image, 0, &attributes);
	if (errorcode != XpmSuccess) {
	    char buf[BUFSZ];
	    Sprintf(buf, "Failed to load %s: %s", appResources.tombstone,
			XpmGetErrorString(errorcode));
	    X11_raw_print(buf);
	}
	rip_width = rip_image->width;
	rip_height = rip_image->height;
    }

    num_args = 0;
    XtSetArg(args[num_args], XtNwidth, rip_width); num_args++;
    XtSetArg(args[num_args], XtNheight, rip_height); num_args++;
    XtSetArg(args[num_args], XtNtranslations,
		XtParseTranslationTable(rip_translations));	num_args++;

    imageport = XtCreateManagedWidget("rip", windowWidgetClass,
		parent, args, num_args);

    XtAddCallback(imageport, XtNexposeCallback, rip_exposed, (XtPointer) 0);

    return imageport;
}

#endif /* GRAPHIC_TOMBSTONE */

/*wintext.c*/
