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https://github.com/reactos/reactos.git
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[WIN32CSR] Implement some basic line editing capability
svn path=/trunk/; revision=47584
This commit is contained in:
Jeffrey Morlan
parent
f4f8ee78d1
commit
7da6d0a6e2
2 changed files with 128 additions and 21 deletions
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@ -22,25 +22,143 @@
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/* FUNCTIONS *****************************************************************/
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/* FUNCTIONS *****************************************************************/
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static VOID
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ConioLineInputSetPos(PCSRSS_CONSOLE Console, UINT Pos)
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{
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if (Pos != Console->LinePos && Console->Mode & ENABLE_ECHO_INPUT)
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{
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PCSRSS_SCREEN_BUFFER Buffer = Console->ActiveBuffer;
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UINT OldCursorX = Buffer->CurrentX;
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UINT OldCursorY = Buffer->CurrentY;
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INT XY = OldCursorY * Buffer->MaxX + OldCursorX;
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XY += (Pos - Console->LinePos);
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if (XY < 0)
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XY = 0;
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else if (XY >= Buffer->MaxY * Buffer->MaxX)
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XY = Buffer->MaxY * Buffer->MaxX - 1;
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Buffer->CurrentX = XY % Buffer->MaxX;
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Buffer->CurrentY = XY / Buffer->MaxX;
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ConioSetScreenInfo(Console, Buffer, OldCursorX, OldCursorY);
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}
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Console->LinePos = Pos;
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}
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static VOID
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ConioLineInputEdit(PCSRSS_CONSOLE Console, UINT NumToDelete, UINT NumToInsert, WCHAR *Insertion)
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{
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UINT Pos = Console->LinePos;
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UINT NewSize = Console->LineSize - NumToDelete + NumToInsert;
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INT i;
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/* Make sure there's always enough room for ending \r\n */
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if (NewSize + 2 > Console->LineMaxSize)
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return;
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memmove(&Console->LineBuffer[Pos + NumToInsert],
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&Console->LineBuffer[Pos + NumToDelete],
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(Console->LineSize - (Pos + NumToDelete)) * sizeof(WCHAR));
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memcpy(&Console->LineBuffer[Pos], Insertion, NumToInsert * sizeof(WCHAR));
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if (Console->Mode & ENABLE_ECHO_INPUT)
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{
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for (i = Pos; i < NewSize; i++)
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{
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CHAR AsciiChar;
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WideCharToMultiByte(Console->OutputCodePage, 0,
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&Console->LineBuffer[i], 1,
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&AsciiChar, 1, NULL, NULL);
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ConioWriteConsole(Console, Console->ActiveBuffer, &AsciiChar, 1, TRUE);
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}
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for (; i < Console->LineSize; i++)
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{
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ConioWriteConsole(Console, Console->ActiveBuffer, " ", 1, TRUE);
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}
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Console->LinePos = i;
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}
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Console->LineSize = NewSize;
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ConioLineInputSetPos(Console, Pos + NumToInsert);
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}
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static VOID
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static VOID
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ConioLineInputKeyDown(PCSRSS_CONSOLE Console, KEY_EVENT_RECORD *KeyEvent)
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ConioLineInputKeyDown(PCSRSS_CONSOLE Console, KEY_EVENT_RECORD *KeyEvent)
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{
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{
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UINT Pos = Console->LinePos;
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switch (KeyEvent->wVirtualKeyCode)
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{
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case VK_ESCAPE:
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/* Clear entire line */
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ConioLineInputSetPos(Console, 0);
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ConioLineInputEdit(Console, Console->LineSize, 0, NULL);
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return;
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case VK_HOME:
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/* Move to start of line. With ctrl, erase everything left of cursor */
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ConioLineInputSetPos(Console, 0);
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if (KeyEvent->dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
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ConioLineInputEdit(Console, Pos, 0, NULL);
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return;
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case VK_END:
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/* Move to end of line. With ctrl, erase everything right of cursor */
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if (KeyEvent->dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
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ConioLineInputEdit(Console, Console->LineSize - Pos, 0, NULL);
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else
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ConioLineInputSetPos(Console, Console->LineSize);
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return;
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case VK_LEFT:
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/* Move left. With ctrl, move to beginning of previous word */
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if (KeyEvent->dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
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{
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while (Pos > 0 && Console->LineBuffer[Pos - 1] == L' ') Pos--;
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while (Pos > 0 && Console->LineBuffer[Pos - 1] != L' ') Pos--;
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}
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else
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{
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Pos -= (Pos > 0);
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}
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ConioLineInputSetPos(Console, Pos);
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return;
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case VK_RIGHT:
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/* Move right. With ctrl, move to beginning of next word */
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if (KeyEvent->dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
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{
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while (Pos < Console->LineSize && Console->LineBuffer[Pos] != L' ') Pos++;
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while (Pos < Console->LineSize && Console->LineBuffer[Pos] == L' ') Pos++;
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}
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else
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{
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Pos += (Pos < Console->LineSize);
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}
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ConioLineInputSetPos(Console, Pos);
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return;
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case VK_DELETE:
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/* Remove character to right of cursor */
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if (Pos != Console->LineSize)
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ConioLineInputEdit(Console, 1, 0, NULL);
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return;
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case VK_F6:
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/* Insert a ^Z character */
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KeyEvent->uChar.UnicodeChar = 26;
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break;
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}
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if (KeyEvent->uChar.UnicodeChar == L'\b' && Console->Mode & ENABLE_PROCESSED_INPUT)
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if (KeyEvent->uChar.UnicodeChar == L'\b' && Console->Mode & ENABLE_PROCESSED_INPUT)
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{
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{
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/* backspace handling - if we are in charge of echoing it then we handle it here
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/* backspace handling - if processed input enabled then we handle it here
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* otherwise we treat it like a normal char.
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* otherwise we treat it like a normal char. */
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*/
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if (Pos > 0)
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if (Console->LineSize > 0)
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{
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{
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Console->LineSize--;
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ConioLineInputSetPos(Console, Pos - 1);
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if (Console->Mode & ENABLE_ECHO_INPUT)
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ConioLineInputEdit(Console, 1, 0, NULL);
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ConioWriteConsole(Console, Console->ActiveBuffer, "\b", 1, TRUE);
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}
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}
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}
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}
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else if (KeyEvent->uChar.UnicodeChar == L'\r')
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else if (KeyEvent->uChar.UnicodeChar == L'\r')
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{
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{
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HistoryAddEntry(Console);
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HistoryAddEntry(Console);
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ConioLineInputSetPos(Console, Console->LineSize);
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Console->LineBuffer[Console->LineSize++] = L'\r';
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Console->LineBuffer[Console->LineSize++] = L'\r';
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if (Console->Mode & ENABLE_ECHO_INPUT)
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if (Console->Mode & ENABLE_ECHO_INPUT)
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ConioWriteConsole(Console, Console->ActiveBuffer, "\r", 1, TRUE);
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ConioWriteConsole(Console, Console->ActiveBuffer, "\r", 1, TRUE);
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@ -55,19 +173,8 @@ ConioLineInputKeyDown(PCSRSS_CONSOLE Console, KEY_EVENT_RECORD *KeyEvent)
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}
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}
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else if (KeyEvent->uChar.UnicodeChar != L'\0')
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else if (KeyEvent->uChar.UnicodeChar != L'\0')
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{
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{
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if (Console->LineSize + 2 < Console->LineMaxSize)
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/* Normal character */
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{
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ConioLineInputEdit(Console, 0, 1, &KeyEvent->uChar.UnicodeChar);
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Console->LineBuffer[Console->LineSize++] = KeyEvent->uChar.UnicodeChar;
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/* echo to screen if enabled */
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if (Console->Mode & ENABLE_ECHO_INPUT)
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{
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CHAR AsciiChar;
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WideCharToMultiByte(Console->OutputCodePage, 0,
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&KeyEvent->uChar.UnicodeChar, 1,
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&AsciiChar, 1, NULL, NULL);
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ConioWriteConsole(Console, Console->ActiveBuffer, &AsciiChar, 1, TRUE);
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}
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}
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}
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}
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}
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}
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