static void GUI_showMenu( const MenuItem * items, int count,
int selection, int row, int height )
{
int i;
CursorState cursorState;
if ( items == NULL || count == 0 )
return;
// head and tail points to the start and the end of the list.
// top and bottom points to the first and last visible items
// in the menu window.
gMenuItems = items;
gMenuRow = row;
gMenuHeight = height;
gMenuItemCount = count;
gMenuTop = 0;
gMenuBottom = min( count, height ) - 1;
gMenuSelection = selection;
gMenuStart = 0;
gMenuEnd = min( count, gui.maxdevices ) - 1;
// If the selected item is not visible, shift the list down.
if ( gMenuSelection > gMenuBottom )
{
gMenuTop += ( gMenuSelection - gMenuBottom );
gMenuBottom = gMenuSelection;
}
if ( gMenuSelection > gMenuEnd )
{
gMenuStart += ( gMenuSelection - gMenuEnd );
gMenuEnd = gMenuSelection;
}
// Draw the visible items.
if( bootArgs->Video.v_display == GRAPHICS_MODE )
{
drawDeviceList(gMenuStart, gMenuEnd, gMenuSelection);
}
else
{
changeCursor( 0, row, kCursorTypeHidden, &cursorState );
for ( i = gMenuTop; i <= gMenuBottom; i++ )
{
printMenuItem( &items[i], (i == gMenuSelection) );
}
restoreCursor( &cursorState );
}
}
static int updateMenu( int key, void ** paramPtr )
{
int moved = 0;
union {
struct {
unsigned int
selectionUp : 1,
selectionDown : 1,
scrollUp : 1,
scrollDown : 1;
} f;
unsigned int w;
} draw = {{0}};
if ( gMenuItems == NULL )
return 0;
if( bootArgs->Video.v_display == GRAPHICS_MODE )
{
int res;
// set navigation keys for horizontal layout as defaults
int previous = 0x4B00; // left arrow
int subsequent = 0x4D00; // right arrow
int menu = 0x5000; // down arrow
if ( gui.layout == VerticalLayout )
{
// set navigation keys for vertical layout
previous = 0x4800; // up arrow
subsequent = 0x5000; // down arrow
menu = 0x4B00; // right arrow
}
if ( key == previous )
{
if ( gMenuSelection > gMenuTop )
draw.f.selectionUp = 1;
else if ( gMenuTop > 0 )
draw.f.scrollDown = 1;
}
else if ( key == subsequent )
{
if ( gMenuSelection != gMenuBottom)
draw.f.selectionDown = 1;
else if ( gMenuBottom < ( gMenuItemCount - 1 ) )
draw.f.scrollUp = 1;
}
else if ( key == menu )
{
if ( gui.menu.draw )
updateInfoMenu(key);
else
drawInfoMenu();
}
else if ( gui.menu.draw )
{
res = updateInfoMenu(key);
if ( res == CLOSE_INFO_MENU )
gui.menu.draw = false;
else
{
shouldboot = ( res != DO_NOT_BOOT );
if ( shouldboot )
gui.menu.draw = false;
switch (res)
{
case BOOT_NORMAL:
gVerboseMode = false;
gBootMode = kBootModeNormal;
break;
case BOOT_VERBOSE:
gVerboseMode = true;
gBootMode = kBootModeNormal;
addBootArg(kVerboseModeFlag);
break;
case BOOT_IGNORECACHE:
gVerboseMode = false;
gBootMode = kBootModeNormal;
addBootArg(kIgnoreCachesFlag);
break;
case BOOT_SINGLEUSER:
gVerboseMode = true;
gBootMode = kBootModeNormal;
addBootArg(kSingleUserModeFlag);
break;
}
}
}
} else {
switch ( key )
{
case 0x4800: // Up Arrow
if ( gMenuSelection != gMenuTop )
draw.f.selectionUp = 1;
else if ( gMenuTop > 0 )
draw.f.scrollDown = 1;
break;
case 0x5000: // Down Arrow
if ( gMenuSelection != gMenuBottom )
draw.f.selectionDown = 1;
else if ( gMenuBottom < (gMenuItemCount - 1) )
draw.f.scrollUp = 1;
break;
}
}
if ( draw.w )
{
if ( draw.f.scrollUp )
{
scollPage(0, gMenuRow, 40, gMenuRow + gMenuHeight - 1, 0x07, 1, 1);
gMenuTop++; gMenuBottom++;
gMenuStart++; gMenuEnd++;
draw.f.selectionDown = 1;
}
if ( draw.f.scrollDown )
{
scollPage(0, gMenuRow, 40, gMenuRow + gMenuHeight - 1, 0x07, 1, -1);
gMenuTop--; gMenuBottom--;
gMenuStart--; gMenuEnd--;
draw.f.selectionUp = 1;
}
if ( draw.f.selectionUp || draw.f.selectionDown )
{
CursorState cursorState;
// Set cursor at current position, and clear inverse video.
if( bootArgs->Video.v_display == VGA_TEXT_MODE )
{
changeCursor( 0, gMenuRow + gMenuSelection - gMenuTop, kCursorTypeHidden, &cursorState );
printMenuItem( &gMenuItems[gMenuSelection], 0 );
}
if ( draw.f.selectionUp )
{
gMenuSelection--;
if(( gMenuSelection - gMenuStart) == -1 )
{
gMenuStart--;
gMenuEnd--;
}
} else {
gMenuSelection++;
if(( gMenuSelection - ( gui.maxdevices - 1) - gMenuStart) > 0 )
{
gMenuStart++;
gMenuEnd++;
}
}
if( bootArgs->Video.v_display == VGA_TEXT_MODE )
{
moveCursor( 0, gMenuRow + gMenuSelection - gMenuTop );
printMenuItem( &gMenuItems[gMenuSelection], 1 );
restoreCursor( &cursorState );
} else
drawDeviceList (gMenuStart, gMenuEnd, gMenuSelection);
}
*paramPtr = gMenuItems[gMenuSelection].param;
moved = 1;
}
return moved;
}