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https://github.com/CloverHackyColor/CloverBootloader.git
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332 lines
7.8 KiB
C
332 lines
7.8 KiB
C
/** @file
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Implements inputbar interface functions.
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Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved. <BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "EditInputBar.h"
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#include "UefiShellDebug1CommandsLib.h"
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CHAR16 *mPrompt; // Input bar mPrompt string.
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CHAR16 *mReturnString; // The returned string.
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UINTN StringSize; // Size of mReturnString space size.
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EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *mTextInEx;
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/**
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Initialize the input bar.
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@param[in] TextInEx Pointer to SimpleTextInEx instance in System Table.
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**/
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VOID
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InputBarInit (
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IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *TextInEx
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)
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{
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mPrompt = NULL;
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mReturnString = NULL;
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StringSize = 0;
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mTextInEx = TextInEx;
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}
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/**
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Cleanup function for input bar.
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**/
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VOID
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InputBarCleanup (
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VOID
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)
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{
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//
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// free input bar's prompt and input string
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//
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SHELL_FREE_NON_NULL (mPrompt);
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SHELL_FREE_NON_NULL (mReturnString);
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mPrompt = NULL;
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mReturnString = NULL;
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}
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/**
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Display the prompt.
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Do the requesting of input.
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@param[in] LastColumn The last printable column.
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@param[in] LastRow The last printable row.
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**/
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VOID
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InputBarPrintInput (
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IN UINTN LastColumn,
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IN UINTN LastRow
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)
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{
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UINTN Limit;
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UINTN Size;
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CHAR16 *Buffer;
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UINTN Index;
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UINTN mPromptLen;
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mPromptLen = StrLen (mPrompt);
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Limit = LastColumn - mPromptLen - 1;
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Size = StrLen (mReturnString);
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//
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// check whether the mPrompt length and input length will
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// exceed limit
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//
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if (Size <= Limit) {
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Buffer = mReturnString;
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} else {
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Buffer = mReturnString + Size - Limit;
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}
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gST->ConOut->EnableCursor (gST->ConOut, FALSE);
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ShellPrintEx (((INT32)mPromptLen), ((INT32)LastRow) - 1, L"%s", Buffer);
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Size = StrLen (Buffer);
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//
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// print " " after mPrompt
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//
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for (Index = Size; Index < Limit; Index++) {
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ShellPrintEx ((INT32)(mPromptLen + Size), ((INT32)LastRow) - 1, L" ");
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}
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gST->ConOut->EnableCursor (gST->ConOut, TRUE);
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gST->ConOut->SetCursorPosition (gST->ConOut, Size + mPromptLen, LastRow - 1);
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}
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typedef struct {
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UINT32 Foreground : 4;
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UINT32 Background : 3;
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} INPUT_BAR_COLOR_ATTRIBUTES;
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typedef union {
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INPUT_BAR_COLOR_ATTRIBUTES Colors;
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UINTN Data;
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} INPUT_BAR_COLOR_UNION;
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/**
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The refresh function for InputBar, it will wait for user input
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@param[in] LastRow The last printable row.
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@param[in] LastColumn The last printable column.
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@retval EFI_SUCCESS The operation was successful.
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**/
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EFI_STATUS
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InputBarRefresh (
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UINTN LastRow,
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UINTN LastColumn
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)
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{
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INPUT_BAR_COLOR_UNION Orig;
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INPUT_BAR_COLOR_UNION New;
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EFI_KEY_DATA KeyData;
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UINTN Size;
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EFI_STATUS Status;
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BOOLEAN NoDisplay;
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UINTN EventIndex;
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UINTN CursorRow;
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UINTN CursorCol;
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//
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// variable initialization
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//
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Size = 0;
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Status = EFI_SUCCESS;
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//
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// back up the old screen attributes
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//
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CursorCol = gST->ConOut->Mode->CursorColumn;
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CursorRow = gST->ConOut->Mode->CursorRow;
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Orig.Data = gST->ConOut->Mode->Attribute;
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New.Data = 0;
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New.Colors.Foreground = Orig.Colors.Background & 0xF;
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New.Colors.Background = Orig.Colors.Foreground & 0x7;
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gST->ConOut->SetAttribute (gST->ConOut, New.Data & 0x7F);
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//
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// clear input bar
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//
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EditorClearLine (LastRow , LastColumn, LastRow);
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gST->ConOut->SetCursorPosition (gST->ConOut, 0, LastRow - 1);
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN(STR_EDIT_LIBINPUTBAR_MAININPUTBAR), gShellDebug1HiiHandle, mPrompt);
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//
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// this is a selection mPrompt, cursor will stay in edit area
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// actually this is for search , search/replace
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//
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if (StrStr (mPrompt, L"Yes/No")) {
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NoDisplay = TRUE;
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gST->ConOut->SetCursorPosition (gST->ConOut, CursorCol, CursorRow);
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gST->ConOut->SetAttribute (gST->ConOut, Orig.Data);
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} else {
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NoDisplay = FALSE;
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}
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//
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// wait for user input
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//
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for (;;) {
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Status = gBS->WaitForEvent (1, &mTextInEx->WaitForKeyEx, &EventIndex);
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if (EFI_ERROR (Status) || (EventIndex != 0)) {
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continue;
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}
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Status = mTextInEx->ReadKeyStrokeEx (mTextInEx, &KeyData);
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if (EFI_ERROR (Status)) {
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continue;
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}
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if (((KeyData.KeyState.KeyShiftState & EFI_SHIFT_STATE_VALID) != 0) &&
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(KeyData.KeyState.KeyShiftState != EFI_SHIFT_STATE_VALID)) {
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//
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// Shift key pressed.
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//
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//continue; //Slice - why Shift prohibited?
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KeyData.KeyState.KeyShiftState &= ~EFI_SHIFT_STATE_VALID;
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}
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//
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// pressed ESC
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//
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if (KeyData.Key.ScanCode == SCAN_ESC) {
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Size = 0;
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Status = EFI_NOT_READY;
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break;
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}
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//
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// return pressed
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//
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if (KeyData.Key.UnicodeChar == CHAR_LINEFEED || KeyData.Key.UnicodeChar == CHAR_CARRIAGE_RETURN) {
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break;
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} else if (KeyData.Key.UnicodeChar == CHAR_BACKSPACE) {
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//
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// backspace
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//
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if (Size > 0) {
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Size--;
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mReturnString[Size] = CHAR_NULL;
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if (!NoDisplay) {
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InputBarPrintInput (LastColumn, LastRow);
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}
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}
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} else if (KeyData.Key.UnicodeChar <= 127 && KeyData.Key.UnicodeChar >= 32) {
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//
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// VALID ASCII char pressed
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//
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mReturnString[Size] = KeyData.Key.UnicodeChar;
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//
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// should be less than specified length
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//
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if (Size >= StringSize) {
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continue;
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}
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Size++;
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mReturnString[Size] = CHAR_NULL;
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if (!NoDisplay) {
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InputBarPrintInput (LastColumn, LastRow);
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} else {
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//
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// if just choose yes/no
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//
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break;
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}
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}
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}
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mReturnString[Size] = CHAR_NULL;
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//
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// restore screen attributes
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//
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gST->ConOut->SetCursorPosition (gST->ConOut, CursorCol, CursorRow);
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gST->ConOut->SetAttribute (gST->ConOut, Orig.Data);
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return Status;
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}
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/**
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SetPrompt and wait for input.
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@param[in] Str The prompt string.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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**/
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EFI_STATUS
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InputBarSetPrompt (
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IN CONST CHAR16 *Str
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)
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{
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//
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// FREE the old mPrompt string
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//
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SHELL_FREE_NON_NULL (mPrompt);
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mPrompt = CatSPrint (NULL, L"%s ", Str);
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if (mPrompt == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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return EFI_SUCCESS;
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}
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/**
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Set the size of the string in characters.
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@param[in] Size The max number of characters to accept.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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**/
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EFI_STATUS
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InputBarSetStringSize (
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UINTN Size
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)
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{
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//
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// free the old ReturnStirng
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//
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SHELL_FREE_NON_NULL (mReturnString);
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StringSize = Size;
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mReturnString = AllocateZeroPool ((StringSize + 1) * sizeof(mReturnString[0]));
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if (mReturnString == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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return EFI_SUCCESS;
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}
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/**
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Function to retrieve the input from the user.
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@retval NULL No input has been received.
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@return The string that was input.
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**/
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CONST CHAR16*
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InputBarGetString (
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VOID
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)
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{
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return (mReturnString);
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}
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