/* Copyright    Massachusetts Institute of Technology    1985	*/

#include "copyright.h"

/*
Copyright (C) 1993-1994, 2001-2021 Free Software Foundation, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.  */


/*
 * XMenu:	MIT Project Athena, X Window system menu package
 *
 * 	XMenuCreate -	Creates an X window system menu object.
 *
 *	Author:		Tony Della Fera, DEC
 *			January 23, 1986
 *
 */

#include "XMenuInt.h"
#include <stdlib.h>
#include <string.h>

#ifdef EMACS_BITMAP_FILES
#include "../src/bitmaps/dimple1.xbm"
#include "../src/bitmaps/dimple3.xbm"
#include "../src/bitmaps/gray1.xbm"
#include "../src/bitmaps/gray3.xbm"
#include "../src/bitmaps/crosswv.xbm"

#include "../src/bitmaps/leftptr.xbm"
#include "../src/bitmaps/leftpmsk.xbm"
#include "../src/bitmaps/rtptr.xbm"
#include "../src/bitmaps/rtpmsk.xbm"
#include "../src/bitmaps/cntrptr.xbm"
#include "../src/bitmaps/cntrpmsk.xbm"
#include "../src/bitmaps/stipple.xbm"

#else

#include <X11/bitmaps/dimple1>
#include <X11/bitmaps/dimple3>
#include <X11/bitmaps/gray1>
#include <X11/bitmaps/gray3>
#include <X11/bitmaps/cross_weave>

#include <X11/bitmaps/left_ptr>
#include <X11/bitmaps/left_ptrmsk>
#include <X11/bitmaps/right_ptr>
#include <X11/bitmaps/right_ptrmsk>
#include <X11/bitmaps/cntr_ptr>
#include <X11/bitmaps/cntr_ptrmsk>
#include <X11/bitmaps/stipple>

#endif /* not EMACS_BITMAP_FILES */

#define DEF_FREEZE		0
#define DEF_REVERSE		0
#define DEF_MENU_STYLE		LEFT
#define DEF_MENU_MODE		BOX
#define DEF_INACT_PNUM		3

#define DEF_P_STYLE		CENTER

#define DEF_P_EVENTS		(EnterWindowMask | ExposureMask)
#define DEF_P_FNT_NAME		"fixed"
#define DEF_P_SPREAD		0.5
#define DEF_P_BDR_WIDTH		2

#define DEF_S_STYLE		LEFT
#define DEF_S_EVENTS		(EnterWindowMask | LeaveWindowMask)
#define DEF_S_FNT_NAME		"fixed"
#define DEF_S_SPREAD		0.10
#define DEF_S_BDR_WIDTH		1

#define XASSOC_TABLE_SIZE	64

const char *x_get_resource_string (char const *, char const *);



static Status
XAllocDisplayColor(Display *display, Colormap map, char const *colorName,
		   XColor *color, XColor *junk)
{
  return (colorName!=0 &&
	  XParseColor(display, map, colorName, color) &&
	  XAllocColor(display, map, color));
}


XMenu *
XMenuCreate(Display *display, Window parent, register char const *def_env)
                                /* ID of previously opened display */
                  		/* Window ID of the menu's parent window. */
                           	/* X Defaults program environment name. */
{
  register const char *def_val;	/* X Default value temp variable. */

  register XMenu *menu;		/* Pointer to the new menu. */
  XMStyle menu_style;		/* Menu display style. */
  XMMode menu_mode;		/* Menu display mode. */
  XMPane *pane;			/* Pane list header. */
  XAssocTable *assoc_tab;	/* XAssocTable pointer. */

  int freeze;			/* Freeze server mode. */
  int reverse;			/* Reverse video mode. */

  XMStyle p_style;		/* Pane display style. */
  char const *p_fnt_name;	/* Flag font name. */
  XFontStruct *p_fnt_info;	/* Flag font structure */
  int p_fnt_pad;		/* Flag font padding in pixels. */
  double p_spread;		/* Pane spread in flag height fractions. */
  int p_fnt_height;		/* Pane character height. */
  int p_bdr_width;		/* Pane border width. */
  int flag_height;		/* Flag window height. */
  int p_height;			/* Pane window height. */
  int p_x_off;			/* Pane X offset. */
  int p_y_off;			/* Pane Y offset. */
  GC pane_GC;			/* Pane graphics context. */

  XMStyle s_style;		/* Selection display style. */
  char const *s_fnt_name;	/* Selection font name. */
  XFontStruct *s_fnt_info;	/* Selection font structure. */
  int s_fnt_pad;		/* Selection font padding in pixels. */
  int s_fnt_height;		/* Selection font character height */
  double s_spread;		/* Select spread in line height fractions. */
  int s_bdr_width;		/* Highlight border width. */
  int s_height;			/* Selection window height. */
  int s_x_off;			/* Selection window X offset. */
  int s_y_off;			/* Selection window Y offset. */
  GC normal_select_GC;		/* GC used for normal video selection. */
  GC inverse_select_GC;		/* GC used for inverse video selection. */
  GC inact_GC;			/* GC for inactive pane header and */
  /* selections. */

  XColor color_def;		/* Temp color definition holder. */
  XColor p_bdr_color;		/* Color of border. */
  XColor s_bdr_color;		/* Color of highlight. */
  XColor p_frg_color;		/* Color of pane foreground color. */
  XColor s_frg_color;		/* Color of selection foreground. */
  XColor bkgnd_color;		/* Color of background.. */
  XColor mouse_color;		/* Color of mouse cursor. */
  Cursor mouse_cursor;		/* Mouse cursor. */
  Pixmap inact_bitmap;		/* Menu inactive pixmap. */

  int inact_pnum;		/* Inactive background pattern number. */

  Pixmap cursor;		/* Cursor pixmap holder. */
  Pixmap cursor_mask;		/* Cursor mask pixmap holder. */
  Pixmap stipple_pixmap;	/* Stipple mask for half-tone text. */
  unsigned long valuemask;
  XGCValues *values;

  Window root = RootWindow (display, DefaultScreen (display));

  /*
   * Calloc the XMenu structure and the initial pane.
   */
  menu = (XMenu *)calloc(1, sizeof(XMenu));
  if (menu == NULL) {
    _XMErrorCode = XME_CALLOC;
    return(NULL);
  }
  pane = (XMPane *)calloc(1, sizeof(XMPane));
  if (pane == NULL) {
    _XMErrorCode = XME_CALLOC;
    return(NULL);
  }

  /*
   * Create the XAssocTable
   */
  assoc_tab = (XAssocTable *)XCreateAssocTable(XASSOC_TABLE_SIZE);
  if(assoc_tab == NULL) {
    _XMErrorCode= XME_CREATE_ASSOC;
    return(NULL);
  }

  /*
   * Set up the default environment name.
   */
  if (def_env == NULL || *def_env == '\0') def_env = "XMenu";

  /*
   * Set up internal fail-safe defaults.
   */
  freeze = DEF_FREEZE;
  reverse = DEF_REVERSE;
  menu_style = DEF_MENU_STYLE;
  menu_mode = DEF_MENU_MODE;
  inact_pnum = DEF_INACT_PNUM;

  p_style = DEF_P_STYLE;
  p_spread = DEF_P_SPREAD;
  p_fnt_name = DEF_P_FNT_NAME;
  p_bdr_width = DEF_P_BDR_WIDTH;

  s_style = DEF_S_STYLE;
  s_spread = DEF_S_SPREAD;
  s_fnt_name = DEF_S_FNT_NAME;
  s_bdr_width = DEF_S_BDR_WIDTH;

  /*
   * Get default values from X.
   */
  def_val = x_get_resource_string ("menuFreeze", "MenuFreeze");
  if (def_val != NULL) {
    if (strcmp(def_val, "on") == 0) freeze = 1;
    else if (strcmp(def_val, "off") == 0) freeze = 0;
  }

  def_val = x_get_resource_string ("menuReverseVideo", "MenuReverseVideo");
  if (def_val != NULL) {
    if (strcmp(def_val, "on") == 0) reverse = 1;
    else if (strcmp(def_val, "off") == 0) reverse = 0;
  }

  def_val = x_get_resource_string ("menuStyle", "MenuStyle");
  if (def_val != NULL) {
    if (strcmp(def_val, "right_hand") == 0) menu_style = RIGHT;
    else if (strcmp(def_val, "left_hand") == 0) menu_style = LEFT;
    else if (strcmp(def_val, "center") == 0) menu_style = CENTER;
  }

  def_val = x_get_resource_string ("menuMode", "MenuMode");
  if (def_val != NULL) {
    if (strcmp(def_val, "box") == 0) menu_mode = BOX;
    else if (strcmp(def_val, "invert") == 0) menu_mode = INVERT;
  }

  def_val = x_get_resource_string ("menuMouse", "MenuMouse");
  if (
      def_val != NULL &&
      DisplayCells(display, DefaultScreen(display)) > 2 &&
      XAllocDisplayColor(display,
			 DefaultColormap(display, DefaultScreen(display)),
			 def_val,
			 &mouse_color, &color_def)
      );
  else if (reverse &&
	   XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "white",
			      &mouse_color, &color_def)
	   );

  else if (XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "black",
			      &mouse_color, &color_def)
	   );

  else {}

  def_val = x_get_resource_string ("menuBackground", "MenuBackground");
  if (
      def_val != NULL &&
      DisplayCells(display, DefaultScreen(display)) > 2 &&
      XAllocDisplayColor(display,
			 DefaultColormap(display, DefaultScreen(display)),
			 def_val,
			 &bkgnd_color, &color_def)
      );
  else if (reverse &&
	   XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "black",
			      &bkgnd_color, &color_def)
	   );
  else if (XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "white",
			      &bkgnd_color, &color_def)
	   );
  else {}

  def_val = x_get_resource_string ("menuInactivePattern", "MenuInactivePattern");
  if (def_val != NULL) {
    if (strcmp(def_val, "dimple1") == 0) inact_pnum = 0;
    else if (strcmp(def_val, "dimple3") == 0) inact_pnum = 1;
    else if (strcmp(def_val, "gray1") == 0) inact_pnum = 2;
    else if (strcmp(def_val, "gray3") == 0) inact_pnum = 3;
    else if (strcmp(def_val, "cross_weave") == 0) inact_pnum = 4;
  }

  def_val = x_get_resource_string ("paneStyle", "PaneStyle");
  if (def_val != NULL) {
    if (strcmp(def_val, "flush_left") == 0) p_style = LEFT;
    else if (strcmp(def_val, "flush_right") == 0) p_style = RIGHT;
    else if (strcmp(def_val, "center") == 0) p_style = CENTER;
  }

  def_val = x_get_resource_string ("paneFont", "PaneFont");
  if (def_val != NULL) p_fnt_name = def_val;

  def_val = x_get_resource_string ("paneForeground", "PaneForeground");
  if (
      def_val != NULL &&
      DisplayCells(display, DefaultScreen(display)) > 2
      )
    XAllocDisplayColor(display, DefaultColormap(display,
						DefaultScreen(display)),
		       def_val,
		       &p_frg_color, &color_def);

  else if (reverse) XAllocDisplayColor(display,
				       DefaultColormap(display,
						       DefaultScreen(display)),
				       "white",
				       &p_frg_color, &color_def);
  else XAllocDisplayColor(display,
			  DefaultColormap(display, DefaultScreen(display)),
			  "black",
			  &p_frg_color, &color_def);

  def_val = x_get_resource_string ("paneBorder", "PaneBorder");
  if (
      def_val != NULL &&
      DisplayCells(display, DefaultScreen(display)) > 2 &&
      XAllocDisplayColor(display,
			 DefaultColormap(display, DefaultScreen(display)),
			 def_val,
			 &p_bdr_color, &color_def)
      );
  else if (reverse &&
	   XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "white",
			      &p_bdr_color, &color_def)
	   );
  else XAllocDisplayColor(display,
			  DefaultColormap(display, DefaultScreen(display)),
			  "black",
			  &p_bdr_color, &color_def);

  def_val = x_get_resource_string ("paneBorderWidth", "PaneBorderWidth");
  if (def_val != NULL) p_bdr_width = atoi(def_val);

  def_val = x_get_resource_string ("paneSpread", "PaneSpread");
  if (def_val != NULL) p_spread = atof(def_val);

  def_val = x_get_resource_string ("selectionStyle", "SelectionStyle");
  if (def_val != NULL) {
    if (strcmp(def_val, "flush_left") == 0) s_style = LEFT;
    else if (strcmp(def_val, "flush_right") == 0) s_style = RIGHT;
    else if (strcmp(def_val, "center") == 0) s_style = CENTER;
  }

  def_val = x_get_resource_string ("selectionFont", "SelectionFont");
  if (def_val != NULL) s_fnt_name = def_val;

  def_val = x_get_resource_string ("selectionForeground", "SelectionForeground");
  if (
      def_val != NULL &&
      DisplayCells(display, DefaultScreen(display)) > 2 &&
      XAllocDisplayColor(display,
			 DefaultColormap(display, DefaultScreen(display)),
			 def_val,
			 &s_frg_color, &color_def)
      );
  else if (reverse &&
	   XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "white",
			      &s_frg_color, &color_def)
	   ) ;
  else if (XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "black",
			      &s_frg_color, &color_def)
	   ) ;
  else {}


  def_val = x_get_resource_string ("selectionBorder", "SelectionBorder");
  if (
      def_val != NULL &&
      DisplayCells(display, DefaultScreen(display)) > 2 &&
      XAllocDisplayColor(display,
			 DefaultColormap(display, DefaultScreen(display)),
			 def_val,
			 &s_bdr_color, &color_def)
      ) ;
  else if (reverse &&
	   XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "white",
			      &s_bdr_color, &color_def)
	   ) ;
  else if (XAllocDisplayColor(display,
			      DefaultColormap(display, DefaultScreen(display)),
			      "black",
			      &s_bdr_color, &color_def)
	   ) ;
  else {}

  def_val = x_get_resource_string ("selectionBorderWidth", "SelectionBorderWidth");
  if (def_val != NULL) s_bdr_width = atoi(def_val);

  def_val = x_get_resource_string ("selectionSpread", "SelectionSpread");
  if (def_val != NULL) s_spread = atof(def_val);

  /*
   * Create and store the inactive pattern pixmap.
   */
  {
    char *data = NULL;
    int width, height;

    switch (inact_pnum)
      {
      case 0:
	data = (char *)dimple1_bits;
	width = dimple1_width;
	height = dimple1_height;
	break;

      case 1:
	data = (char *)dimple3_bits;
	width = dimple3_width;
	height = dimple3_height;
	break;

      case 2:
	data = (char *)gray1_bits;
	width = gray1_width;
	height = gray1_height;
	break;

      case 3:
	data = (char *)gray3_bits;
	width = gray3_width;
	height = gray3_height;
	break;

      case 4:
	data = (char *)cross_weave_bits;
	width = cross_weave_width;
	height = cross_weave_height;
	break;
      }

    if (! data)
      {
	_XMErrorCode = XME_STORE_BITMAP;
	return(NULL);
      }

    inact_bitmap =
      XCreatePixmapFromBitmapData
	(display, root, data, width, height,
	 p_frg_color.pixel, bkgnd_color.pixel,
	 DisplayPlanes (display, DefaultScreen (display)));
  }

  /*
   * Load the mouse cursor.
   */

  switch (menu_style) {
  case LEFT:
    cursor = XCreateBitmapFromData(display,
				   root,
				   left_ptr_bits,
				   left_ptr_width,
				   left_ptr_height);
    cursor_mask = XCreateBitmapFromData(display,
					root,
					left_ptrmsk_bits,
					left_ptrmsk_width,
					left_ptrmsk_height);
    mouse_cursor = XCreatePixmapCursor(
				       display,
				       cursor, cursor_mask,
				       &mouse_color, &bkgnd_color,
				       left_ptr_x_hot,
				       left_ptr_y_hot
				       );
    XFreePixmap(display, cursor);
    XFreePixmap(display, cursor_mask);
    break;
  case RIGHT:
    cursor = XCreateBitmapFromData(display,
				   root,
				   right_ptr_bits,
				   right_ptr_width,
				   right_ptr_height);
    cursor_mask = XCreateBitmapFromData(display,
					root,
					right_ptrmsk_bits,
					right_ptrmsk_width,
					right_ptrmsk_height);
    mouse_cursor = XCreatePixmapCursor(
				       display,
				       cursor, cursor_mask,
				       &mouse_color, &bkgnd_color,
				       right_ptr_x_hot,
				       right_ptr_y_hot
				       );
    XFreePixmap(display, cursor);
    XFreePixmap(display, cursor_mask);
    break;
  case CENTER:
    cursor = XCreateBitmapFromData(display,
				   root,
				   cntr_ptr_bits,
				   cntr_ptr_width,
				   cntr_ptr_height);
    cursor_mask = XCreateBitmapFromData(display,
					root,
					cntr_ptrmsk_bits,
					cntr_ptrmsk_width,
					cntr_ptrmsk_height);
    mouse_cursor = XCreatePixmapCursor(
				       display,
				       cursor, cursor_mask,
				       &mouse_color, &bkgnd_color,
				       cntr_ptr_x_hot,
				       cntr_ptr_y_hot
				       );
    XFreePixmap(display, cursor);
    XFreePixmap(display, cursor_mask);
    break;
  default:
    /* Error! Invalid style parameter. */
    _XMErrorCode = XME_STYLE_PARAM;
    return(NULL);
  }
  if (mouse_cursor == _X_FAILURE) {
    _XMErrorCode = XME_CREATE_CURSOR;
    return(NULL);
  }

  /*
   * Open the pane and selection fonts.
   */

  p_fnt_info = XLoadQueryFont(display, p_fnt_name);
  if (p_fnt_info == NULL) {
    _XMErrorCode = XME_OPEN_FONT;
    return(NULL);

  }

  s_fnt_info = XLoadQueryFont(display, s_fnt_name);
  if (s_fnt_info == NULL) {
    _XMErrorCode = XME_OPEN_FONT;
    return(NULL);
  }
  /*
   * Calculate the fixed padding value in pixels for each font.
   */
  p_fnt_height = p_fnt_info->max_bounds.ascent + p_fnt_info->max_bounds.descent;
  s_fnt_height = s_fnt_info->max_bounds.ascent + s_fnt_info->max_bounds.descent;
  p_fnt_pad = s_spread * p_fnt_height;
  s_fnt_pad = s_spread * s_fnt_height;

  /*
   * Calculate fixed height and offset requirements.
   */
  flag_height = p_fnt_height + (p_fnt_pad << 1);

  p_height = 0;
  p_y_off = flag_height + p_bdr_width;
  p_x_off = p_y_off * p_spread;

  s_height = s_fnt_height + (s_fnt_pad << 1) + (s_bdr_width << 1);
  s_y_off = s_height;
  s_x_off = p_x_off;

  /*
   * Set up the pane list header.
   */
  pane->next = pane;
  pane->prev = pane;
  pane->type = PL_HEADER;
  pane->serial = -1;

  /*
   * Initialize the internal pane and selection creation queues.
   */
  _XMWinQueInit();

  /*
   * Create pane, active, and inactive GC's.
   */
  values = (XGCValues *)malloc(sizeof(XGCValues));
  valuemask = (GCForeground | GCBackground | GCFont | GCLineWidth);

  /*
   * First, pane.
   */

  values->foreground = p_frg_color.pixel;
  values->background = bkgnd_color.pixel;
  values->font = p_fnt_info->fid;
  values->line_width = p_bdr_width;

  pane_GC = XCreateGC(
		      display,
		      root,
		      valuemask,
		      values);
  /*
   * Then normal video selection.
   */

  values->foreground = s_frg_color.pixel;
  values->background = bkgnd_color.pixel;
  values->font = s_fnt_info->fid;
  values->line_width = s_bdr_width;
  normal_select_GC = XCreateGC(display,
			       root,
			       valuemask,
			       values);
  /*
   * Inverse video selection.
   */

  values->foreground = bkgnd_color.pixel;
  values->background = s_frg_color.pixel;
  values->font = s_fnt_info->fid;
  values->line_width = s_bdr_width;
  inverse_select_GC = XCreateGC(display,
				root,
				valuemask,
				values);
  stipple_pixmap = XCreateBitmapFromData(display,
					 root,
					 stipple_bits,
					 stipple_width,
					 stipple_height);

  /*
   * Finally, inactive pane header and selections
   */
  valuemask |= (GCFillStyle | GCStipple);
  values->foreground = s_frg_color.pixel;
  values->background = bkgnd_color.pixel;
  values->font = s_fnt_info->fid;
  values->line_width = s_bdr_width;
  values->fill_style = FillStippled;
  values->stipple = stipple_pixmap;

  inact_GC = XCreateGC(display,
		       root,
		       valuemask,
		       values);

  valuemask |= (GCGraphicsExposures);
  values->graphics_exposures = False;


  /*
   * Construct the XMenu object.
   */
  /* -------------------- Menu data -------------------- */
  menu->menu_style = menu_style;
  menu->menu_mode = menu_mode;
  menu->freeze = freeze;
  menu->aeq = 0;
  menu->recompute = 1;
  menu->parent = parent;
  menu->height = 0;
  menu->width = 0;
  menu->mouse_cursor = mouse_cursor;
  menu->assoc_tab = assoc_tab;
  menu->p_list = pane;
  /* -------------------- Pane window data -------------------- */
  menu->p_style = p_style;
  menu->p_events = DEF_P_EVENTS;
  menu->p_fnt_info = p_fnt_info;
  menu->p_fnt_pad = p_fnt_pad;
  menu->p_spread = p_spread;
  menu->p_bdr_width = p_bdr_width;
  menu->flag_height = flag_height;
  menu->p_width = 0;
  menu->p_height = p_height;
  menu->p_x_off = p_x_off;
  menu->p_y_off = p_y_off;
  menu->p_count = 0;
  menu->pane_GC = pane_GC;
  menu->x_pos = 0;
  menu->y_pos = 0;
  /* -------------------- Selection window data -------------------- */
  menu->s_style = s_style;
  menu->s_events = DEF_S_EVENTS;
  menu->s_fnt_info = s_fnt_info;
  menu->s_fnt_pad = s_fnt_pad;
  menu->s_spread = s_spread;
  menu->s_bdr_width = s_bdr_width; /* unnecessary */
  menu->s_width = 0;
  menu->s_height = s_height;
  menu->s_x_off = s_x_off;
  menu->s_y_off = s_y_off;
  menu->s_count = 0;
  menu->normal_select_GC = normal_select_GC;
  menu->inverse_select_GC = inverse_select_GC;
  menu->inact_GC = inact_GC;
  /* -------------------- Color data -------------------- */
  menu->p_bdr_color = p_bdr_color.pixel;
  menu->s_bdr_color = s_bdr_color.pixel;
  menu->p_frg_color = p_frg_color.pixel;
  menu->s_frg_color = s_frg_color.pixel;
  menu->bkgnd_color = bkgnd_color.pixel;
  /* -------------------- Pixmap data -------------------- */
  menu->p_bdr_pixmap = None;
  menu->s_bdr_pixmap = None;
  menu->p_frg_pixmap = None;
  menu->s_frg_pixmap = None;
  menu->bkgnd_pixmap = None;
  menu->inact_pixmap = inact_bitmap;

  /*
   * Return the completed XMenu.
   */
  _XMErrorCode = XME_NO_ERROR;
  return(menu);
}