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Diffstat (limited to 'Core/EM/EdkIILib/Console.c')
| -rw-r--r-- | Core/EM/EdkIILib/Console.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/Core/EM/EdkIILib/Console.c b/Core/EM/EdkIILib/Console.c new file mode 100644 index 0000000..dbb0745 --- /dev/null +++ b/Core/EM/EdkIILib/Console.c @@ -0,0 +1,200 @@ +/** @file + This module provide help function for displaying unicode string. + + Copyright (c) 2006 - 2009, Intel Corporation<BR> + All rights reserved. This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + + + + +#include <EdkIICommon.h> +#include <AmiDxeLib.h> +#include <Protocol/SimpleTextIn.h> + + +#define EFI_SIMPLE_TEXT_OUT_PROTOCOL EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL +#define EFI_SIMPLE_TEXT_OUTPUT_MODE SIMPLE_TEXT_OUTPUT_MODE + + + +/** + 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)); + ASSERT (Line != NULL); + + // + // 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); + } +} |