/* prototypes for this file are in sun.trm-proto */
/* GNUPLOT - sun.trm */
/*
 * Copyright (C) 1990   
 *
 * Permission to use,  copy,  and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted,  
 * provided that the above copyright notice appear in all copies and 
 * that both that copyright notice and this permission notice appear 
 * in supporting documentation.
 *
 * Permission to modify the software is granted,  but not the right to
 * distribute the modified code.  Modifications are to be distributed 
 * as patches to released version.
 *  
 * This software  is provided "as is" without express or implied warranty.
 * 
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *   SUNview windowing system
 *
 * AUTHORS
 *  Maurice Castro
 * 
 * send your comments or suggestions to (pixar!info-gnuplot@sun.com).
 * 
 */

#include <suntool/sunview.h>
#include <suntool/canvas.h>
#include <suntool/scrollbar.h>
#include <suntool/panel.h>
#include <pixrect/pixrect_hs.h>

#define SUN_XMAX 600
#define SUN_YMAX 512

#define SUN_VCHAR (12)		/* default,  will be changed */
#define SUN_HCHAR (8)		/* default,  will be changed */
#define SUN_VTIC (SUN_YMAX/80)
#define SUN_HTIC (SUN_XMAX/80)
#define MARGIN 5
#define MINWIN 128

static Frame frame;
static Canvas canvas;
static Pixwin *pw;
static struct pixfont *sun_font = NULL;

static enum JUSTIFY sun_justify=LEFT;


static Notify_value local_notice_destroy(Frame frame, 
    Destroy_status status);
  
/* dotted line generator */
int sun_value = 1;	/* this can be used for colour */
int sun_line_mask = 0xffff;	/* 16 bit mask for dotted lines */
static int sun_pattern[] = {0xffff,  0x1111, 
	0xffff,  0x5555,  0x3333,  0x7777,  0x3f3f,  0x0f0f,  0x5f5f};
int sun_mask_count = 0;
int sun_lastx,  sun_lasty;	/* last pixel set - used by sun_line */


int SUN_init(void)
{
  struct termentry *t = &term_tbl[term];
  struct pr_subregion bound;

  frame = window_create(NULL,  FRAME,  
            FRAME_LABEL,                "Gnuplot", 
            0);
  notify_interpose_destroy_func(frame, local_notice_destroy);
  canvas = window_create(frame,  CANVAS, 
            CANVAS_AUTO_EXPAND,         TRUE, 
            CANVAS_AUTO_SHRINK,         TRUE, 
            CANVAS_MARGIN,              MARGIN, 
            0);
  notify_do_dispatch();
  pw = canvas_pixwin(canvas);
  window_set(frame,  WIN_SHOW,  TRUE,  0);

  /* figure out font and rough size */
  sun_font = pf_default();
  pf_textbound(&bound,  1,  sun_font,  "M");
  t->v_char = bound.size.y;
  t->h_char = bound.size.x;

  return;
}

int SUN_graphics(void)
{
  term_tbl[term].xmax = (int) window_get(canvas, CANVAS_WIDTH);
  term_tbl[term].ymax = (int) window_get(canvas, CANVAS_HEIGHT);
  pw_writebackground(pw, 0, 0, term_tbl[term].xmax,  term_tbl[term].ymax,  PIX_SRC );
  notify_dispatch();
  /* do not let the user make the window too small */
  if ((term_tbl[term].xmax)<MINWIN)
  {
      window_set(frame, 
            WIN_WIDTH,                 MINWIN+2*MARGIN+24, 
            0);
      notify_dispatch();
      SUN_graphics();
      }
  if ((term_tbl[term].ymax) <MINWIN)
  {
      window_set(frame, 
            WIN_HEIGHT,                MINWIN+2*MARGIN+24, 
            0);
      notify_dispatch();
      SUN_graphics();
      }
  notify_dispatch();
  return;
}

int SUN_text(void)
{
  notify_dispatch();
  return; /* enter text from another window!!! */
}

int SUN_linetype(int linetype)
{
	if (linetype>=7)
		linetype %= 7;
	sun_line_mask = sun_pattern[linetype+2];
	sun_mask_count=0;
}


int SUN_move(int x, int y)
{
  sun_lastx = x;
  sun_lasty = y;
  notify_dispatch();
  return;
}

int SUN_vector(int x, int y)
{
  if ( (x>=term_tbl[term].xmax) || (y>=term_tbl[term].ymax) )
	return;
  sun_line(sun_lastx, x, sun_lasty, y);
  canvas_pixwin(canvas);
  notify_dispatch();
  return;
}


int SUN_put_text(int x, int y, char *str)
{
  struct pr_subregion bound;

  if ( (x>=term_tbl[term].xmax) || (y>=term_tbl[term].ymax) )
	return;

  pf_textbound(&bound,  strlen(str),  sun_font,  str);
  y = term_tbl[term].ymax-1-y + bound.size.y/3; /* vertical centering */

  switch(sun_justify) {
	 case LEFT:   break;
	 case CENTRE: x -= bound.size.x/2; break;
	 case RIGHT:  x -= bound.size.x; break;
  }
  pw_text(pw,  x, y,  PIX_SRC | PIX_DST,  0,  str); 
  canvas_pixwin(canvas);
  notify_dispatch();
  return;
}
 

int SUN_justify_text(enum JUSTIFY mode)
{
    sun_justify = mode;
    return (TRUE);
}
  
  


int SUN_reset(void)
{
  
  term_tbl[term].xmax = SUN_XMAX;
  term_tbl[term].ymax = SUN_YMAX;
  window_set(frame,  WIN_SHOW,  FALSE,  0);
  return;
}



int sun_setmaskpixel(int x, int y, int value)
{
	/* dotted line generator */
	if ((sun_line_mask>>sun_mask_count)&(int)(1)) {
		pw_put(pw, x, term_tbl[term].ymax-1-y, sun_value);
	}
	sun_mask_count= (sun_mask_count+1) % 16;
	sun_lastx= x;  /* last pixel set with mask */
	sun_lasty= y;
}




int sun_line(int x1, int x2, int y1, 
    int y2)
{
int runcount;
int dx, dy;
int xinc, yinc;
int xplot, yplot;

	runcount=0;
	dx = abs((int)(x1)-(int)(x2));
	if (x2>x1)  xinc=  1;
	if (x2==x1) xinc=  0;
	if (x2<x1)  xinc= -1;
	dy = abs((int)(y1)-(int)(y2));
	if (y2>y1)  yinc=  1;
	if (y2==y1) yinc=  0;
	if (y2<y1)  yinc= -1;
	xplot=x1;
	yplot=y1;
	if (dx>dy) {
		/* iterate x */
		if ( (sun_line_mask==0xffff) ||
			((xplot!=sun_lastx) && (yplot!=sun_lasty)) )
			sun_setmaskpixel(xplot, yplot, sun_value);
		while (xplot!=x2) { 
			xplot+=xinc;
			runcount+=dy;
			if (runcount>=(dx-runcount)) {
				yplot+=yinc;
				runcount-=dx;
			}
			sun_setmaskpixel(xplot, yplot, sun_value);
		} 
	} else {
		/* iterate y */
		if ( (sun_line_mask==0xffff) ||
			((xplot!=sun_lastx) && (yplot!=sun_lasty)) )
			sun_setmaskpixel(xplot, yplot, sun_value);
		while (yplot!=y2) {
			yplot+=yinc;
			runcount+=dx;
			if (runcount>=(dy-runcount)) {
				xplot+=xinc;
				runcount-=dy;
			}
			sun_setmaskpixel(xplot, yplot, sun_value);
		} 
	}
}


static Notify_value local_notice_destroy(Frame frame, 
    Destroy_status status)
{
   if (status != DESTROY_CHECKING)
   {
      SUN_reset();
      term_init = FALSE;
      }
   return(NOTIFY_DONE);
   }