mirror of https://github.com/acidanthera/audk.git
Add CreatePopUp API into UefiLib
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8016 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lgao4
parent
b71870c014
commit
db2ef756ba
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@ -716,6 +716,31 @@ GetBestLanguage (
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...
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...
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);
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);
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/**
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Draws a dialog box to the console output device specified by
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ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
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from the console input device specified by ConIn defined in the
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EFI_SYSTEM_TABLE.
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If there are no strings in the variable argument list, then ASSERT().
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If all the strings in the variable argument list are empty, then ASSERT().
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@param[in] Attribute Specifies the foreground and background color of the popup.
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@param[out] Key A pointer to the EFI_KEY value of the key that was
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pressed. This is an optional parameter that may be NULL.
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If it is NULL then no wait for a keypress will be performed.
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@param[in] ... The variable argument list that contains pointers to Null-
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terminated Unicode strings to display in the dialog box.
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The variable argument list is terminated by a NULL.
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**/
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VOID
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EFIAPI
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CreatePopUp (
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IN UINTN Attribute,
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OUT EFI_INPUT_KEY *Key, OPTIONAL
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...
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);
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/**
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/**
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Retrieves the width of a Unicode character.
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Retrieves the width of a Unicode character.
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@ -287,3 +287,176 @@ UnicodeStringDisplayLength (
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return Length;
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return Length;
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}
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}
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/**
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Draws a dialog box to the console output device specified by
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ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
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from the console input device specified by ConIn defined in the
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EFI_SYSTEM_TABLE.
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If there are no strings in the variable argument list, then ASSERT().
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If all the strings in the variable argument list are empty, then ASSERT().
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@param[in] Attribute Specifies the foreground and background color of the popup.
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@param[out] Key A pointer to the EFI_KEY value of the key that was
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pressed. This is an optional parameter that may be NULL.
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If it is NULL then no wait for a keypress will be performed.
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@param[in] ... The variable argument list that contains pointers to Null-
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terminated Unicode strings to display in the dialog box.
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The variable argument list is terminated by a NULL.
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**/
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VOID
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EFIAPI
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CreatePopUp (
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IN UINTN Attribute,
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OUT EFI_INPUT_KEY *Key, OPTIONAL
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...
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)
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{
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VA_LIST Args;
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EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *ConOut;
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EFI_SIMPLE_TEXT_OUTPUT_MODE SavedConsoleMode;
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UINTN Columns;
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UINTN Rows;
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UINTN Column;
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UINTN Row;
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UINTN NumberOfLines;
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UINTN MaxLength;
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CHAR16 *String;
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UINTN Length;
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CHAR16 *Line;
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UINTN EventIndex;
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//
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// Determine the length of the longest line in the popup and the the total
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// number of lines in the popup
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//
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VA_START (Args, Key);
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MaxLength = 0;
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NumberOfLines = 0;
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while ((String = VA_ARG (Args, CHAR16 *)) != NULL) {
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MaxLength = MAX (MaxLength, StrLen (String));
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NumberOfLines++;
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}
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VA_END (Args);
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//
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// If the total number of lines in the popup is zero, then ASSERT()
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//
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ASSERT (NumberOfLines != 0);
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//
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// If the maximum length of all the strings is zero, then ASSERT()
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//
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ASSERT (MaxLength != 0);
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//
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// Cache a pointer to the Simple Text Output Protocol in the EFI System Table
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//
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ConOut = gST->ConOut;
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//
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// Save the current console cursor position and attributes
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//
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CopyMem (&SavedConsoleMode, ConOut->Mode, sizeof (SavedConsoleMode));
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//
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// Retrieve the number of columns and rows in the current console mode
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//
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ConOut->QueryMode (ConOut, SavedConsoleMode.Mode, &Columns, &Rows);
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//
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// Disable cursor and set the foreground and background colors specified by Attribute
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//
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ConOut->EnableCursor (ConOut, FALSE);
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ConOut->SetAttribute (ConOut, Attribute);
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//
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// Limit NumberOfLines to height of the screen minus 3 rows for the box itself
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//
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NumberOfLines = MIN (NumberOfLines, Rows - 3);
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//
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// Limit MaxLength to width of the screen minus 2 columns for the box itself
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//
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MaxLength = MIN (MaxLength, Columns - 2);
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//
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// Compute the starting row and starting column for the popup
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//
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Row = (Rows - (NumberOfLines + 3)) / 2;
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Column = (Columns - (MaxLength + 2)) / 2;
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//
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// Allocate a buffer for a single line of the popup with borders and a Null-terminator
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//
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Line = AllocateZeroPool ((MaxLength + 3) * sizeof (CHAR16));
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//
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// Draw top of popup box
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//
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SetMem16 (Line, (MaxLength + 2) * 2, BOXDRAW_HORIZONTAL);
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Line[0] = BOXDRAW_DOWN_RIGHT;
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Line[MaxLength + 1] = BOXDRAW_DOWN_LEFT;
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Line[MaxLength + 2] = L'\0';
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ConOut->SetCursorPosition (ConOut, Column, Row++);
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ConOut->OutputString (ConOut, Line);
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//
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// Draw middle of the popup with strings
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//
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VA_START (Args, Key);
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while ((String = VA_ARG (Args, CHAR16 *)) != NULL && NumberOfLines > 0) {
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Length = StrLen (String);
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SetMem16 (Line, (MaxLength + 2) * 2, L' ');
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if (Length <= MaxLength) {
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//
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// Length <= MaxLength
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//
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CopyMem (Line + 1 + (MaxLength - Length) / 2, String , Length * sizeof (CHAR16));
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} else {
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//
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// Length > MaxLength
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//
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CopyMem (Line + 1, String + (Length - MaxLength) / 2 , MaxLength * sizeof (CHAR16));
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}
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Line[0] = BOXDRAW_VERTICAL;
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Line[MaxLength + 1] = BOXDRAW_VERTICAL;
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Line[MaxLength + 2] = L'\0';
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ConOut->SetCursorPosition (ConOut, Column, Row++);
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ConOut->OutputString (ConOut, Line);
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NumberOfLines--;
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}
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VA_END (Args);
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//
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// Draw bottom of popup box
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//
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SetMem16 (Line, (MaxLength + 2) * 2, BOXDRAW_HORIZONTAL);
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Line[0] = BOXDRAW_UP_RIGHT;
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Line[MaxLength + 1] = BOXDRAW_UP_LEFT;
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Line[MaxLength + 2] = L'\0';
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ConOut->SetCursorPosition (ConOut, Column, Row++);
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ConOut->OutputString (ConOut, Line);
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//
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// Free the allocated line buffer
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//
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FreePool (Line);
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//
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// Restore the cursor visibility, position, and attributes
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//
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ConOut->EnableCursor (ConOut, SavedConsoleMode.CursorVisible);
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ConOut->SetCursorPosition (ConOut, SavedConsoleMode.CursorColumn, SavedConsoleMode.CursorRow);
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ConOut->SetAttribute (ConOut, SavedConsoleMode.Attribute);
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//
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// Wait for a keystroke
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//
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if (Key != NULL) {
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gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
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gST->ConIn->ReadKeyStroke (gST->ConIn, Key);
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}
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}
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