diff options
| -rw-r--r-- | MdePkg/Include/Library/UefiLib.h | 25 | ||||
| -rw-r--r-- | MdePkg/Library/UefiLib/Console.c | 173 |
2 files changed, 198 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/UefiLib.h b/MdePkg/Include/Library/UefiLib.h index 1853f81..340a030 100644 --- a/MdePkg/Include/Library/UefiLib.h +++ b/MdePkg/Include/Library/UefiLib.h @@ -716,6 +716,31 @@ GetBestLanguage ( ...
);
+/**
+ Draws a dialog box to the console output device specified by
+ ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
+ from the console input device specified by ConIn defined in the
+ EFI_SYSTEM_TABLE.
+
+ If there are no strings in the variable argument list, then ASSERT().
+ If all the strings in the variable argument list are empty, then ASSERT().
+
+ @param[in] Attribute Specifies the foreground and background color of the popup.
+ @param[out] Key A pointer to the EFI_KEY value of the key that was
+ pressed. This is an optional parameter that may be NULL.
+ If it is NULL then no wait for a keypress will be performed.
+ @param[in] ... The variable argument list that contains pointers to Null-
+ terminated Unicode strings to display in the dialog box.
+ The variable argument list is terminated by a NULL.
+
+**/
+VOID
+EFIAPI
+CreatePopUp (
+ IN UINTN Attribute,
+ OUT EFI_INPUT_KEY *Key, OPTIONAL
+ ...
+ );
/**
Retrieves the width of a Unicode character.
diff --git a/MdePkg/Library/UefiLib/Console.c b/MdePkg/Library/UefiLib/Console.c index 9e842ba..6157dac 100644 --- a/MdePkg/Library/UefiLib/Console.c +++ b/MdePkg/Library/UefiLib/Console.c @@ -287,3 +287,176 @@ UnicodeStringDisplayLength ( return Length;
}
+
+/**
+ Draws a dialog box to the console output device specified by
+ ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
+ from the console input device specified by ConIn defined in the
+ EFI_SYSTEM_TABLE.
+
+ If there are no strings in the variable argument list, then ASSERT().
+ If all the strings in the variable argument list are empty, then ASSERT().
+
+ @param[in] Attribute Specifies the foreground and background color of the popup.
+ @param[out] Key A pointer to the EFI_KEY value of the key that was
+ pressed. This is an optional parameter that may be NULL.
+ If it is NULL then no wait for a keypress will be performed.
+ @param[in] ... The variable argument list that contains pointers to Null-
+ terminated Unicode strings to display in the dialog box.
+ The variable argument list is terminated by a NULL.
+
+**/
+VOID
+EFIAPI
+CreatePopUp (
+ IN UINTN Attribute,
+ OUT EFI_INPUT_KEY *Key, OPTIONAL
+ ...
+ )
+{
+ VA_LIST Args;
+ EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *ConOut;
+ EFI_SIMPLE_TEXT_OUTPUT_MODE SavedConsoleMode;
+ UINTN Columns;
+ UINTN Rows;
+ UINTN Column;
+ UINTN Row;
+ UINTN NumberOfLines;
+ UINTN MaxLength;
+ CHAR16 *String;
+ UINTN Length;
+ CHAR16 *Line;
+ UINTN EventIndex;
+
+ //
+ // Determine the length of the longest line in the popup and the the total
+ // number of lines in the popup
+ //
+ VA_START (Args, Key);
+ MaxLength = 0;
+ NumberOfLines = 0;
+ while ((String = VA_ARG (Args, CHAR16 *)) != NULL) {
+ MaxLength = MAX (MaxLength, StrLen (String));
+ NumberOfLines++;
+ }
+ VA_END (Args);
+
+ //
+ // If the total number of lines in the popup is zero, then ASSERT()
+ //
+ ASSERT (NumberOfLines != 0);
+
+ //
+ // If the maximum length of all the strings is zero, then ASSERT()
+ //
+ ASSERT (MaxLength != 0);
+
+ //
+ // Cache a pointer to the Simple Text Output Protocol in the EFI System Table
+ //
+ ConOut = gST->ConOut;
+
+ //
+ // Save the current console cursor position and attributes
+ //
+ CopyMem (&SavedConsoleMode, ConOut->Mode, sizeof (SavedConsoleMode));
+
+ //
+ // Retrieve the number of columns and rows in the current console mode
+ //
+ ConOut->QueryMode (ConOut, SavedConsoleMode.Mode, &Columns, &Rows);
+
+ //
+ // Disable cursor and set the foreground and background colors specified by Attribute
+ //
+ ConOut->EnableCursor (ConOut, FALSE);
+ ConOut->SetAttribute (ConOut, Attribute);
+
+ //
+ // Limit NumberOfLines to height of the screen minus 3 rows for the box itself
+ //
+ NumberOfLines = MIN (NumberOfLines, Rows - 3);
+
+ //
+ // Limit MaxLength to width of the screen minus 2 columns for the box itself
+ //
+ MaxLength = MIN (MaxLength, Columns - 2);
+
+ //
+ // Compute the starting row and starting column for the popup
+ //
+ Row = (Rows - (NumberOfLines + 3)) / 2;
+ Column = (Columns - (MaxLength + 2)) / 2;
+
+ //
+ // Allocate a buffer for a single line of the popup with borders and a Null-terminator
+ //
+ Line = AllocateZeroPool ((MaxLength + 3) * sizeof (CHAR16));
+
+ //
+ // Draw top of popup box
+ //
+ SetMem16 (Line, (MaxLength + 2) * 2, BOXDRAW_HORIZONTAL);
+ Line[0] = BOXDRAW_DOWN_RIGHT;
+ Line[MaxLength + 1] = BOXDRAW_DOWN_LEFT;
+ Line[MaxLength + 2] = L'\0';
+ ConOut->SetCursorPosition (ConOut, Column, Row++);
+ ConOut->OutputString (ConOut, Line);
+
+ //
+ // Draw middle of the popup with strings
+ //
+ VA_START (Args, Key);
+ while ((String = VA_ARG (Args, CHAR16 *)) != NULL && NumberOfLines > 0) {
+ Length = StrLen (String);
+ SetMem16 (Line, (MaxLength + 2) * 2, L' ');
+ if (Length <= MaxLength) {
+ //
+ // Length <= MaxLength
+ //
+ CopyMem (Line + 1 + (MaxLength - Length) / 2, String , Length * sizeof (CHAR16));
+ } else {
+ //
+ // Length > MaxLength
+ //
+ CopyMem (Line + 1, String + (Length - MaxLength) / 2 , MaxLength * sizeof (CHAR16));
+ }
+ Line[0] = BOXDRAW_VERTICAL;
+ Line[MaxLength + 1] = BOXDRAW_VERTICAL;
+ Line[MaxLength + 2] = L'\0';
+ ConOut->SetCursorPosition (ConOut, Column, Row++);
+ ConOut->OutputString (ConOut, Line);
+ NumberOfLines--;
+ }
+ VA_END (Args);
+
+ //
+ // Draw bottom of popup box
+ //
+ SetMem16 (Line, (MaxLength + 2) * 2, BOXDRAW_HORIZONTAL);
+ Line[0] = BOXDRAW_UP_RIGHT;
+ Line[MaxLength + 1] = BOXDRAW_UP_LEFT;
+ Line[MaxLength + 2] = L'\0';
+ ConOut->SetCursorPosition (ConOut, Column, Row++);
+ ConOut->OutputString (ConOut, Line);
+
+ //
+ // Free the allocated line buffer
+ //
+ FreePool (Line);
+
+ //
+ // Restore the cursor visibility, position, and attributes
+ //
+ ConOut->EnableCursor (ConOut, SavedConsoleMode.CursorVisible);
+ ConOut->SetCursorPosition (ConOut, SavedConsoleMode.CursorColumn, SavedConsoleMode.CursorRow);
+ ConOut->SetAttribute (ConOut, SavedConsoleMode.Attribute);
+
+ //
+ // Wait for a keystroke
+ //
+ if (Key != NULL) {
+ gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
+ gST->ConIn->ReadKeyStroke (gST->ConIn, Key);
+ }
+}
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