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MdeModulePkg/DisplayEngine: Fix incorrect display issue

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In a form, some new menus may be dynamically inserted between highlight
menu and previous top of screen menu when some question are refreshed.
So the highlight menu and previous top of screen menu perhaps can't be
shown in one page. Existing codes miss to handle this case then will
cause incorrect display.This patch is to fix this display issue.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Dandan Bi 2017-07-28 10:40:14 +08:00 committed by Hao Wu
parent ba78032bc8
commit ef3d1df77b
1 changed files with 52 additions and 10 deletions
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62
MdeModulePkg/Universal/DisplayEngineDxe/FormDisplay.c
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@ -1718,23 +1718,56 @@ IsTopOfScreeMenuOption (
}
/**
Find the Top of screen menu.
Calculate the distance between two menus and include the skip value of StartMenu.
If the input is NULL, base on the record highlight info in
gHighligthMenuInfo to find the last highlight menu.
@param StartMenu The link_entry pointer to start menu.
@param EndMenu The link_entry pointer to end menu.
@param HighLightedStatement The input highlight statement.
**/
UINTN
GetDistanceBetweenMenus(
IN LIST_ENTRY *StartMenu,
IN LIST_ENTRY *EndMenu
)
{
LIST_ENTRY *Link;
UI_MENU_OPTION *MenuOption;
UINTN Distance;
@retval The highlight menu index.
Distance = 0;
Link = StartMenu;
while (Link != EndMenu) {
MenuOption = MENU_OPTION_FROM_LINK (Link);
if (MenuOption->Row == 0) {
UpdateOptionSkipLines (MenuOption);
}
Distance += MenuOption->Skip;
Link = Link->BackLink;
}
return Distance;
}
/**
Find the top of screen menu base on the previous record menu info.
@param HighLightMenu The link_entry pointer to highlight menu.
@retval Return the the link_entry pointer top of screen menu.
**/
LIST_ENTRY *
FindTopOfScreenMenuOption (
VOID
)
IN LIST_ENTRY *HighLightMenu
)
{
LIST_ENTRY *NewPos;
UI_MENU_OPTION *MenuOption;
UINTN TopRow;
UINTN BottomRow;
TopRow = gStatementDimensions.TopRow + SCROLL_ARROW_HEIGHT;
BottomRow = gStatementDimensions.BottomRow - SCROLL_ARROW_HEIGHT;
NewPos = gMenuOption.ForwardLink;
MenuOption = MENU_OPTION_FROM_LINK (NewPos);
@ -1754,7 +1787,16 @@ FindTopOfScreenMenuOption (
// Last time top of screen menu has disappeared.
//
if (NewPos == &gMenuOption) {
NewPos = NULL;
return NULL;
}
//
// Check whether highlight menu and top of screen menu can be shown within one page,
// if can't, return NULL to re-calcaulate the top of scrren menu. Because some new menus
// may be dynamically inserted between highlightmenu and previous top of screen menu,
// So previous record top of screen menu is not appropriate for current display.
//
if (GetDistanceBetweenMenus (HighLightMenu, NewPos) + 1 > BottomRow - TopRow) {
return NULL;
}
return NewPos;
@ -1805,7 +1847,7 @@ FindTopMenu (
//
// Found the last time highlight menu.
//
*TopOfScreen = FindTopOfScreenMenuOption();
*TopOfScreen = FindTopOfScreenMenuOption(*HighlightMenu);
if (*TopOfScreen != NULL) {
//
// Found the last time selectable top of screen menu.
@ -1858,7 +1900,7 @@ FindTopMenu (
MenuOption = MENU_OPTION_FROM_LINK (*HighlightMenu);
UpdateOptionSkipLines (MenuOption);
*TopOfScreen = FindTopOfScreenMenuOption();
*TopOfScreen = FindTopOfScreenMenuOption(*HighlightMenu);
if (*TopOfScreen == NULL) {
//
// Not found last time top of screen menu, so base on current highlight menu