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+/****************************************************************************
+ * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
+ ****************************************************************************/
+
+/***************************************************************************
+* Module m_global *
+* Globally used internal routines and the default menu and item structures *
+***************************************************************************/
+
+#include "menu.priv.h"
+
+MODULE_ID("$Id: m_global.c,v 1.11 1999/05/16 17:25:14 juergen Exp $")
+
+MENU _nc_Default_Menu = {
+ 16, /* Nr. of chars high */
+ 1, /* Nr. of chars wide */
+ 16, /* Nr. of items high */
+ 1, /* Nr. of items wide */
+ 16, /* Nr. of formatted items high */
+ 1, /* Nr. of formatted items wide */
+ 16, /* Nr. of items high (actual) */
+ 0, /* length of widest name */
+ 0, /* length of widest description */
+ 1, /* length of mark */
+ 1, /* length of one item */
+ 1, /* Spacing for descriptor */
+ 1, /* Spacing for columns */
+ 1, /* Spacing for rows */
+ (char *)0, /* buffer used to store match chars */
+ 0, /* Index into pattern buffer */
+ (WINDOW *)0, /* Window containing entire menu */
+ (WINDOW *)0, /* Portion of menu displayed */
+ (WINDOW *)0, /* User's window */
+ (WINDOW *)0, /* User's subwindow */
+ (ITEM **)0, /* List of items */
+ 0, /* Total Nr. of items in menu */
+ (ITEM *)0, /* Current item */
+ 0, /* Top row of menu */
+ (chtype)A_REVERSE, /* Attribute for selection */
+ (chtype)A_NORMAL, /* Attribute for nonselection */
+ (chtype)A_UNDERLINE, /* Attribute for inactive */
+ ' ', /* Pad character */
+ (Menu_Hook)0, /* Menu init */
+ (Menu_Hook)0, /* Menu term */
+ (Menu_Hook)0, /* Item init */
+ (Menu_Hook)0, /* Item term */
+ (void *)0, /* userptr */
+ "-", /* mark */
+ ALL_MENU_OPTS, /* options */
+ 0 /* status */
+};
+
+ITEM _nc_Default_Item = {
+ { (char *)0, 0 }, /* name */
+ { (char *)0, 0 }, /* description */
+ (MENU *)0, /* Pointer to parent menu */
+ (char *)0, /* Userpointer */
+ ALL_ITEM_OPTS, /* options */
+ 0, /* Item Nr. */
+ 0, /* y */
+ 0, /* x */
+ FALSE, /* value */
+ (ITEM *)0, /* left */
+ (ITEM *)0, /* right */
+ (ITEM *)0, /* up */
+ (ITEM *)0 /* down */
+ };
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : static void ComputeMaximum_NameDesc_Lenths(MENU *menu)
+|
+| Description : Calculates the maximum name and description lengths
+| of the items connected to the menu
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+INLINE static void ComputeMaximum_NameDesc_Lengths(MENU * menu)
+{
+ unsigned MaximumNameLength = 0;
+ unsigned MaximumDescriptionLength = 0;
+ ITEM **items;
+
+ assert(menu && menu->items);
+ for( items = menu->items; *items ; items++ )
+ {
+ if (items[0]->name.length > MaximumNameLength )
+ MaximumNameLength = items[0]->name.length;
+
+ if (items[0]->description.length > MaximumDescriptionLength)
+ MaximumDescriptionLength = items[0]->description.length;
+ }
+
+ menu->namelen = MaximumNameLength;
+ menu->desclen = MaximumDescriptionLength;
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : static void ResetConnectionInfo(MENU *, ITEM **)
+|
+| Description : Reset all informations in the menu and the items in
+| the item array that indicates a connection
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+INLINE static void ResetConnectionInfo(MENU *menu, ITEM **items)
+{
+ ITEM **item;
+
+ assert(menu && items);
+ for(item=items; *item; item++)
+ {
+ (*item)->index = 0;
+ (*item)->imenu = (MENU *)0;
+ }
+ if (menu->pattern)
+ free(menu->pattern);
+ menu->pattern = (char *)0;
+ menu->pindex = 0;
+ menu->items = (ITEM **)0;
+ menu->nitems = 0;
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : bool _nc_Connect_Items(MENU *menu, ITEM **items)
+|
+| Description : Connect the items in the item array to the menu.
+| Decorate all the items with a number and a backward
+| pointer to the menu.
+|
+| Return Values : TRUE - successfull connection
+| FALSE - connection failed
++--------------------------------------------------------------------------*/
+bool _nc_Connect_Items(MENU *menu, ITEM **items)
+{
+ ITEM **item;
+ unsigned int ItemCount = 0;
+
+ if ( menu && items )
+ {
+ for(item=items; *item ; item++)
+ {
+ if ( (*item)->imenu )
+ {
+ /* if a item is already connected, reject connection */
+ break;
+ }
+ }
+ if (! (*item) )
+ /* we reached the end, so there was no connected item */
+ {
+ for(item=items; *item ; item++)
+ {
+ if (menu->opt & O_ONEVALUE)
+ {
+ (*item)->value = FALSE;
+ }
+ (*item)->index = ItemCount++;
+ (*item)->imenu = menu;
+ }
+ }
+ }
+ else
+ return(FALSE);
+
+ if (ItemCount != 0)
+ {
+ menu->items = items;
+ menu->nitems = ItemCount;
+ ComputeMaximum_NameDesc_Lengths(menu);
+ if ( (menu->pattern = (char *)malloc( (unsigned)(1 + menu->namelen))) )
+ {
+ Reset_Pattern(menu);
+ set_menu_format(menu,menu->frows,menu->fcols);
+ menu->curitem = *items;
+ menu->toprow = 0;
+ return(TRUE);
+ }
+ }
+
+ /* If we fall through to this point, we have to reset all items connection
+ and inform about a reject connection */
+ ResetConnectionInfo( menu, items );
+ return(FALSE);
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : void _nc_Disconnect_Items(MENU *menu)
+|
+| Description : Disconnect the menus item array from the menu
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+void _nc_Disconnect_Items(MENU * menu)
+{
+ if (menu && menu->items)
+ ResetConnectionInfo( menu, menu->items );
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : void _nc_Calculate_Item_Length_and_Width(MENU *menu)
+|
+| Description : Calculate the length of an item and the width of the
+| whole menu.
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+void _nc_Calculate_Item_Length_and_Width(MENU * menu)
+{
+ int l;
+
+ assert(menu);
+
+ menu->height = 1 + menu->spc_rows * (menu->arows - 1);
+
+ l = menu->namelen + menu->marklen;
+ if ( (menu->opt & O_SHOWDESC) && (menu->desclen > 0) )
+ l += (menu->desclen + menu->spc_desc);
+
+ menu->itemlen = l;
+ l *= menu->cols;
+ l += (menu->cols-1)*menu->spc_cols; /* for the padding between the columns */
+ menu->width = l;
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : void _nc_Link_Item(MENU *menu)
+|
+| Description : Statically calculate for every item its four neighbours.
+| This depends on the orientation of the menu. This
+| static aproach simplifies navigation in the menu a lot.
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+void _nc_Link_Items(MENU * menu)
+{
+ if (menu && menu->items && *(menu->items))
+ {
+ int i,j;
+ ITEM *item;
+ int Number_Of_Items = menu->nitems;
+ int col = 0, row = 0;
+ int Last_in_Row;
+ int Last_in_Column;
+ bool cycle = (menu->opt & O_NONCYCLIC) ? FALSE : TRUE;
+
+ menu->status &= ~_LINK_NEEDED;
+
+ if (menu->opt & O_ROWMAJOR)
+ {
+ int Number_Of_Columns = menu->cols;
+
+ for(i=0; i < Number_Of_Items; i++)
+ {
+ item = menu->items[i];
+
+ Last_in_Row = row * Number_Of_Columns + (Number_Of_Columns-1);
+
+ item->left = (col) ?
+ /* if we are not in the leftmost column, we can use the
+ predecessor in the items array */
+ menu->items[i-1] :
+ (cycle ? menu->items[(Last_in_Row>=Number_Of_Items) ?
+ Number_Of_Items-1:
+ Last_in_Row] :
+ (ITEM *)0 );
+
+ item->right = ( (col < (Number_Of_Columns-1)) &&
+ ((i+1) < Number_Of_Items)
+ ) ?
+ menu->items[i+1] :
+ ( cycle ? menu->items[row * Number_Of_Columns] :
+ (ITEM *)0
+ );
+
+ Last_in_Column = (menu->rows-1) * Number_Of_Columns + col;
+
+ item->up = (row) ? menu->items[i-Number_Of_Columns] :
+ (cycle ? menu->items[(Last_in_Column>=Number_Of_Items) ?
+ Number_Of_Items-1 :
+ Last_in_Column] :
+ (ITEM *)0);
+
+ item->down = ( (i+Number_Of_Columns) < Number_Of_Items )
+ ?
+ menu->items[i + Number_Of_Columns] :
+ (cycle ? menu->items[(row+1)<menu->rows ?
+ Number_Of_Items-1:col] :
+ (ITEM *)0);
+ item->x = col;
+ item->y = row;
+ if ( ++col == Number_Of_Columns )
+ {
+ row++;
+ col = 0;
+ }
+ }
+ }
+ else
+ {
+ int Number_Of_Rows = menu->rows;
+
+ for(j=0; j<Number_Of_Items; j++)
+ {
+ item = menu->items[i=(col * Number_Of_Rows + row)];
+
+ Last_in_Column = (menu->cols-1) * Number_Of_Rows + row;
+
+ item->left = (col) ?
+ menu->items[i - Number_Of_Rows] :
+ (cycle ? (Last_in_Column >= Number_Of_Items ) ?
+ menu->items[Last_in_Column-Number_Of_Rows] :
+ menu->items[Last_in_Column] :
+ (ITEM *)0 );
+
+ item->right = ((i + Number_Of_Rows) <Number_Of_Items)
+ ?
+ menu->items[i + Number_Of_Rows] :
+ (cycle ? menu->items[row] : (ITEM *)0);
+
+ Last_in_Row = col * Number_Of_Rows + (Number_Of_Rows - 1);
+
+ item->up = (row) ?
+ menu->items[i-1] :
+ (cycle ?
+ menu->items[(Last_in_Row>=Number_Of_Items) ?
+ Number_Of_Items-1:
+ Last_in_Row] :
+ (ITEM *)0);
+
+ item->down = (row < (Number_Of_Rows-1))
+ ?
+ (menu->items[((i+1)<Number_Of_Items) ?
+ i+1 :
+ (col-1)*Number_Of_Rows + row + 1]) :
+ (cycle ?
+ menu->items[col * Number_Of_Rows] :
+ (ITEM *)0
+ );
+
+ item->x = col;
+ item->y = row;
+ if ( (++row) == Number_Of_Rows )
+ {
+ col++;
+ row = 0;
+ }
+ }
+ }
+ }
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : void _nc_Show_Menu(const MENU *menu)
+|
+| Description : Update the window that is associated with the menu
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+void _nc_Show_Menu(const MENU *menu)
+{
+ WINDOW *win;
+ int maxy, maxx;
+
+ assert(menu);
+ if ( (menu->status & _POSTED) && !(menu->status & _IN_DRIVER) )
+ {
+ /* adjust the internal subwindow to start on the current top */
+ assert(menu->sub);
+ mvderwin(menu->sub,menu->spc_rows * menu->toprow,0);
+ win = Get_Menu_Window(menu);
+
+ maxy = getmaxy(win);
+ maxx = getmaxx(win);
+
+ if (menu->height < maxy)
+ maxy = menu->height;
+ if (menu->width < maxx)
+ maxx = menu->width;
+
+ copywin(menu->sub,win,0,0,0,0,maxy-1,maxx-1,0);
+ pos_menu_cursor(menu);
+ }
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnmenu
+| Function : void _nc_New_TopRow_and_CurrentItem(
+| MENU *menu,
+| int new_toprow,
+| ITEM *new_current_item)
+|
+| Description : Redisplay the menu so that the given row becomes the
+| top row and the given item becomes the new current
+| item.
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+void _nc_New_TopRow_and_CurrentItem(MENU *menu, int new_toprow,
+ ITEM *new_current_item)
+{
+ ITEM *cur_item;
+ bool mterm_called = FALSE;
+ bool iterm_called = FALSE;
+
+ assert(menu);
+ if (menu->status & _POSTED)
+ {
+ if (new_current_item != menu->curitem)
+ {
+ Call_Hook(menu,itemterm);
+ iterm_called = TRUE;
+ }
+ if (new_toprow != menu->toprow)
+ {
+ Call_Hook(menu,menuterm);
+ mterm_called = TRUE;
+ }
+
+ cur_item = menu->curitem;
+ assert(cur_item);
+ menu->toprow = new_toprow;
+ menu->curitem = new_current_item;
+
+ if (mterm_called)
+ {
+ Call_Hook(menu,menuinit);
+ }
+ if (iterm_called)
+ {
+ /* this means, move from the old current_item to the new one... */
+ Move_To_Current_Item( menu, cur_item );
+ Call_Hook(menu,iteminit);
+ }
+ if (mterm_called || iterm_called)
+ {
+ _nc_Show_Menu(menu);
+ }
+ else
+ pos_menu_cursor(menu);
+ }
+ else
+ { /* if we are not posted, this is quite simple */
+ menu->toprow = new_toprow;
+ menu->curitem = new_current_item;
+ }
+}
+
+/* m_global.c ends here */