mirror of
https://github.com/reactos/reactos.git
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597 lines
20 KiB
C
597 lines
20 KiB
C
/*
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* PROJECT: ReactOS CSRSS
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: subsystems/win32/csrss/win32csr/lineinput.c
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* PURPOSE: Console line input functions
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* PROGRAMMERS: Jeffrey Morlan
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*/
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/* INCLUDES ******************************************************************/
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#define NDEBUG
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#include "w32csr.h"
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#include <debug.h>
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typedef struct tagHISTORY_BUFFER
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{
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LIST_ENTRY ListEntry;
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WORD Position;
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WORD MaxEntries;
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WORD NumEntries;
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PUNICODE_STRING Entries;
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UNICODE_STRING ExeName;
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} HISTORY_BUFFER, *PHISTORY_BUFFER;
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/* FUNCTIONS *****************************************************************/
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static PHISTORY_BUFFER
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HistoryCurrentBuffer(PCSRSS_CONSOLE Console)
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{
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/* TODO: use actual EXE name sent from process that called ReadConsole */
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UNICODE_STRING ExeName = { 14, 14, L"cmd.exe" };
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PLIST_ENTRY Entry = Console->HistoryBuffers.Flink;
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PHISTORY_BUFFER Hist;
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for (; Entry != &Console->HistoryBuffers; Entry = Entry->Flink)
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{
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Hist = CONTAINING_RECORD(Entry, HISTORY_BUFFER, ListEntry);
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if (RtlEqualUnicodeString(&ExeName, &Hist->ExeName, FALSE))
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return Hist;
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}
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/* Couldn't find the buffer, create a new one */
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Hist = HeapAlloc(Win32CsrApiHeap, 0, sizeof(HISTORY_BUFFER) + ExeName.Length);
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if (!Hist)
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return NULL;
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Hist->MaxEntries = Console->HistoryBufferSize;
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Hist->NumEntries = 0;
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Hist->Entries = HeapAlloc(Win32CsrApiHeap, 0, Hist->MaxEntries * sizeof(UNICODE_STRING));
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if (!Hist->Entries)
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{
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HeapFree(Win32CsrApiHeap, 0, Hist);
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return NULL;
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}
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Hist->ExeName.Length = Hist->ExeName.MaximumLength = ExeName.Length;
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Hist->ExeName.Buffer = (PWCHAR)(Hist + 1);
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memcpy(Hist->ExeName.Buffer, ExeName.Buffer, ExeName.Length);
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InsertHeadList(&Console->HistoryBuffers, &Hist->ListEntry);
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return Hist;
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}
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static VOID
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HistoryAddEntry(PCSRSS_CONSOLE Console)
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{
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UNICODE_STRING NewEntry;
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PHISTORY_BUFFER Hist;
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INT i;
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NewEntry.Length = NewEntry.MaximumLength = Console->LineSize * sizeof(WCHAR);
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NewEntry.Buffer = Console->LineBuffer;
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if (!(Hist = HistoryCurrentBuffer(Console)))
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return;
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/* Don't add blank or duplicate entries */
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if (NewEntry.Length == 0 || Hist->MaxEntries == 0 ||
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(Hist->NumEntries > 0 &&
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RtlEqualUnicodeString(&Hist->Entries[Hist->NumEntries - 1], &NewEntry, FALSE)))
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{
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return;
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}
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if (Console->HistoryNoDup)
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{
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/* Check if this line has been entered before */
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for (i = Hist->NumEntries - 1; i >= 0; i--)
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{
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if (RtlEqualUnicodeString(&Hist->Entries[i], &NewEntry, FALSE))
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{
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/* Just rotate the list to bring this entry to the end */
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NewEntry = Hist->Entries[i];
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memmove(&Hist->Entries[i], &Hist->Entries[i + 1],
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(Hist->NumEntries - (i + 1)) * sizeof(UNICODE_STRING));
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Hist->Entries[Hist->NumEntries - 1] = NewEntry;
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Hist->Position = Hist->NumEntries - 1;
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return;
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}
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}
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}
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if (Hist->NumEntries == Hist->MaxEntries)
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{
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/* List is full, remove oldest entry */
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RtlFreeUnicodeString(&Hist->Entries[0]);
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memmove(&Hist->Entries[0], &Hist->Entries[1],
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--Hist->NumEntries * sizeof(UNICODE_STRING));
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}
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if (NT_SUCCESS(RtlDuplicateUnicodeString(0, &NewEntry, &Hist->Entries[Hist->NumEntries])))
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Hist->NumEntries++;
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Hist->Position = Hist->NumEntries - 1;
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}
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static VOID
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HistoryGetCurrentEntry(PCSRSS_CONSOLE Console, PUNICODE_STRING Entry)
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{
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PHISTORY_BUFFER Hist;
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if (!(Hist = HistoryCurrentBuffer(Console)) || Hist->NumEntries == 0)
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Entry->Length = 0;
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else
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*Entry = Hist->Entries[Hist->Position];
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}
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static PHISTORY_BUFFER
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HistoryFindBuffer(PCSRSS_CONSOLE Console, PUNICODE_STRING ExeName)
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{
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PLIST_ENTRY Entry = Console->HistoryBuffers.Flink;
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while (Entry != &Console->HistoryBuffers)
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{
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/* For the history APIs, the caller is allowed to give only part of the name */
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PHISTORY_BUFFER Hist = CONTAINING_RECORD(Entry, HISTORY_BUFFER, ListEntry);
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if (RtlPrefixUnicodeString(ExeName, &Hist->ExeName, TRUE))
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return Hist;
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Entry = Entry->Flink;
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}
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return NULL;
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}
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VOID FASTCALL
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HistoryDeleteBuffer(PHISTORY_BUFFER Hist)
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{
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if (!Hist)
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return;
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while (Hist->NumEntries != 0)
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RtlFreeUnicodeString(&Hist->Entries[--Hist->NumEntries]);
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HeapFree(Win32CsrApiHeap, 0, Hist->Entries);
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RemoveEntryList(&Hist->ListEntry);
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HeapFree(Win32CsrApiHeap, 0, Hist);
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}
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CSR_API(CsrGetCommandHistoryLength)
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{
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PCSRSS_CONSOLE Console;
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NTSTATUS Status;
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PHISTORY_BUFFER Hist;
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ULONG Length = 0;
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INT i;
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if (!Win32CsrValidateBuffer(ProcessData,
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Request->Data.GetCommandHistoryLength.ExeName.Buffer,
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Request->Data.GetCommandHistoryLength.ExeName.Length, 1))
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{
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return STATUS_ACCESS_VIOLATION;
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}
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Status = ConioConsoleFromProcessData(ProcessData, &Console);
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if (NT_SUCCESS(Status))
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{
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Hist = HistoryFindBuffer(Console, &Request->Data.GetCommandHistory.ExeName);
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if (Hist)
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{
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for (i = 0; i < Hist->NumEntries; i++)
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Length += Hist->Entries[i].Length + sizeof(WCHAR);
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}
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Request->Data.GetCommandHistoryLength.Length = Length;
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ConioUnlockConsole(Console);
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}
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return Status;
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}
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CSR_API(CsrGetCommandHistory)
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{
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PCSRSS_CONSOLE Console;
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NTSTATUS Status;
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PHISTORY_BUFFER Hist;
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PBYTE Buffer = (PBYTE)Request->Data.GetCommandHistory.History;
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ULONG BufferSize = Request->Data.GetCommandHistory.Length;
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INT i;
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if (!Win32CsrValidateBuffer(ProcessData, Buffer, BufferSize, 1) ||
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!Win32CsrValidateBuffer(ProcessData,
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Request->Data.GetCommandHistory.ExeName.Buffer,
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Request->Data.GetCommandHistory.ExeName.Length, 1))
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{
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return STATUS_ACCESS_VIOLATION;
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}
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Status = ConioConsoleFromProcessData(ProcessData, &Console);
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if (NT_SUCCESS(Status))
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{
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Hist = HistoryFindBuffer(Console, &Request->Data.GetCommandHistory.ExeName);
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if (Hist)
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{
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for (i = 0; i < Hist->NumEntries; i++)
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{
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if (BufferSize < (Hist->Entries[i].Length + sizeof(WCHAR)))
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{
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Status = STATUS_BUFFER_OVERFLOW;
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break;
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}
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memcpy(Buffer, Hist->Entries[i].Buffer, Hist->Entries[i].Length);
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Buffer += Hist->Entries[i].Length;
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*(PWCHAR)Buffer = L'\0';
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Buffer += sizeof(WCHAR);
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}
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}
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Request->Data.GetCommandHistory.Length = Buffer - (PBYTE)Request->Data.GetCommandHistory.History;
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ConioUnlockConsole(Console);
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}
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return Status;
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}
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CSR_API(CsrExpungeCommandHistory)
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{
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PCSRSS_CONSOLE Console;
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PHISTORY_BUFFER Hist;
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NTSTATUS Status;
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if (!Win32CsrValidateBuffer(ProcessData,
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Request->Data.ExpungeCommandHistory.ExeName.Buffer,
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Request->Data.ExpungeCommandHistory.ExeName.Length, 1))
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{
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return STATUS_ACCESS_VIOLATION;
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}
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Status = ConioConsoleFromProcessData(ProcessData, &Console);
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if (NT_SUCCESS(Status))
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{
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Hist = HistoryFindBuffer(Console, &Request->Data.ExpungeCommandHistory.ExeName);
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HistoryDeleteBuffer(Hist);
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ConioUnlockConsole(Console);
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}
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return Status;
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}
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CSR_API(CsrSetHistoryNumberCommands)
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{
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PCSRSS_CONSOLE Console;
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PHISTORY_BUFFER Hist;
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NTSTATUS Status;
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WORD MaxEntries = Request->Data.SetHistoryNumberCommands.NumCommands;
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PUNICODE_STRING OldEntryList, NewEntryList;
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if (!Win32CsrValidateBuffer(ProcessData,
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Request->Data.SetHistoryNumberCommands.ExeName.Buffer,
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Request->Data.SetHistoryNumberCommands.ExeName.Length, 1))
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{
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return STATUS_ACCESS_VIOLATION;
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}
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Status = ConioConsoleFromProcessData(ProcessData, &Console);
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if (NT_SUCCESS(Status))
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{
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Hist = HistoryFindBuffer(Console, &Request->Data.SetHistoryNumberCommands.ExeName);
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if (Hist)
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{
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OldEntryList = Hist->Entries;
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NewEntryList = HeapAlloc(Win32CsrApiHeap, 0,
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MaxEntries * sizeof(UNICODE_STRING));
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if (!NewEntryList)
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{
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Status = STATUS_NO_MEMORY;
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}
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else
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{
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/* If necessary, shrink by removing oldest entries */
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for (; Hist->NumEntries > MaxEntries; Hist->NumEntries--)
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{
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RtlFreeUnicodeString(Hist->Entries++);
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Hist->Position += (Hist->Position == 0);
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}
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Hist->MaxEntries = MaxEntries;
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Hist->Entries = memcpy(NewEntryList, Hist->Entries,
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Hist->NumEntries * sizeof(UNICODE_STRING));
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HeapFree(Win32CsrApiHeap, 0, OldEntryList);
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}
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}
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ConioUnlockConsole(Console);
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}
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return Status;
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}
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CSR_API(CsrGetHistoryInfo)
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{
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PCSRSS_CONSOLE Console;
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NTSTATUS Status = ConioConsoleFromProcessData(ProcessData, &Console);
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if (NT_SUCCESS(Status))
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{
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Request->Data.SetHistoryInfo.HistoryBufferSize = Console->HistoryBufferSize;
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Request->Data.SetHistoryInfo.NumberOfHistoryBuffers = Console->NumberOfHistoryBuffers;
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Request->Data.SetHistoryInfo.dwFlags = Console->HistoryNoDup;
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ConioUnlockConsole(Console);
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}
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return Status;
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}
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CSR_API(CsrSetHistoryInfo)
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{
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PCSRSS_CONSOLE Console;
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NTSTATUS Status = ConioConsoleFromProcessData(ProcessData, &Console);
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if (NT_SUCCESS(Status))
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{
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Console->HistoryBufferSize = (WORD)Request->Data.SetHistoryInfo.HistoryBufferSize;
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Console->NumberOfHistoryBuffers = (WORD)Request->Data.SetHistoryInfo.NumberOfHistoryBuffers;
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Console->HistoryNoDup = Request->Data.SetHistoryInfo.dwFlags & HISTORY_NO_DUP_FLAG;
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ConioUnlockConsole(Console);
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}
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return Status;
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}
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static VOID
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LineInputSetPos(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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LineInputEdit(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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LineInputSetPos(Console, Pos + NumToInsert);
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}
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static VOID
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LineInputRecallHistory(PCSRSS_CONSOLE Console, INT Offset)
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{
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PHISTORY_BUFFER Hist;
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if (!(Hist = HistoryCurrentBuffer(Console)) || Hist->NumEntries == 0)
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return;
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Offset += Hist->Position;
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Offset = max(Offset, 0);
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Offset = min(Offset, Hist->NumEntries - 1);
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Hist->Position = Offset;
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LineInputSetPos(Console, 0);
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LineInputEdit(Console, Console->LineSize,
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Hist->Entries[Offset].Length / sizeof(WCHAR),
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Hist->Entries[Offset].Buffer);
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}
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VOID FASTCALL
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LineInputKeyDown(PCSRSS_CONSOLE Console, KEY_EVENT_RECORD *KeyEvent)
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{
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UINT Pos = Console->LinePos;
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PHISTORY_BUFFER Hist;
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UNICODE_STRING Entry;
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INT HistPos;
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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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LineInputSetPos(Console, 0);
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LineInputEdit(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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LineInputSetPos(Console, 0);
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if (KeyEvent->dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
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LineInputEdit(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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LineInputEdit(Console, Console->LineSize - Pos, 0, NULL);
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else
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LineInputSetPos(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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LineInputSetPos(Console, Pos);
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return;
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case VK_RIGHT:
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case VK_F1:
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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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LineInputSetPos(Console, Pos);
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return;
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}
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else
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{
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/* Recall one character (but don't overwrite current line) */
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HistoryGetCurrentEntry(Console, &Entry);
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if (Pos < Console->LineSize)
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LineInputSetPos(Console, Pos + 1);
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else if (Pos * sizeof(WCHAR) < Entry.Length)
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LineInputEdit(Console, 0, 1, &Entry.Buffer[Pos]);
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}
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return;
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case VK_INSERT:
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/* Toggle between insert and overstrike */
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Console->LineInsertToggle = !Console->LineInsertToggle;
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ConioSetCursorInfo(Console, Console->ActiveBuffer);
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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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LineInputEdit(Console, 1, 0, NULL);
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return;
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case VK_PRIOR:
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/* Recall first history entry */
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LineInputRecallHistory(Console, -((WORD)-1));
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return;
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case VK_NEXT:
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/* Recall last history entry */
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LineInputRecallHistory(Console, +((WORD)-1));
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return;
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case VK_UP:
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case VK_F5:
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/* Recall previous history entry. On first time, actually recall the
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* current (usually last) entry; on subsequent times go back. */
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LineInputRecallHistory(Console, Console->LineUpPressed ? -1 : 0);
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Console->LineUpPressed = TRUE;
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return;
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case VK_DOWN:
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/* Recall next history entry */
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LineInputRecallHistory(Console, +1);
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return;
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case VK_F3:
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/* Recall remainder of current history entry */
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HistoryGetCurrentEntry(Console, &Entry);
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if (Pos * sizeof(WCHAR) < Entry.Length)
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{
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UINT InsertSize = (Entry.Length / sizeof(WCHAR) - Pos);
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UINT DeleteSize = min(Console->LineSize - Pos, InsertSize);
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LineInputEdit(Console, DeleteSize, InsertSize, &Entry.Buffer[Pos]);
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}
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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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case VK_F7:
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if (KeyEvent->dwControlKeyState & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
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HistoryDeleteBuffer(HistoryCurrentBuffer(Console));
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return;
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case VK_F8:
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/* Search for history entries starting with input. */
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if (!(Hist = HistoryCurrentBuffer(Console)) || Hist->NumEntries == 0)
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return;
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|
|
/* Like Up/F5, on first time start from current (usually last) entry,
|
|
* but on subsequent times start at previous entry. */
|
|
if (Console->LineUpPressed)
|
|
Hist->Position = (Hist->Position ? Hist->Position : Hist->NumEntries) - 1;
|
|
Console->LineUpPressed = TRUE;
|
|
|
|
Entry.Length = Console->LinePos * sizeof(WCHAR);
|
|
Entry.Buffer = Console->LineBuffer;
|
|
|
|
/* Keep going backwards, even wrapping around to the end,
|
|
* until we get back to starting point */
|
|
HistPos = Hist->Position;
|
|
do
|
|
{
|
|
if (RtlPrefixUnicodeString(&Entry, &Hist->Entries[HistPos], FALSE))
|
|
{
|
|
Hist->Position = HistPos;
|
|
LineInputEdit(Console, Console->LineSize - Pos,
|
|
Hist->Entries[HistPos].Length / sizeof(WCHAR) - Pos,
|
|
&Hist->Entries[HistPos].Buffer[Pos]);
|
|
/* Cursor stays where it was */
|
|
LineInputSetPos(Console, Pos);
|
|
return;
|
|
}
|
|
if (--HistPos < 0) HistPos += Hist->NumEntries;
|
|
} while (HistPos != Hist->Position);
|
|
return;
|
|
}
|
|
|
|
if (KeyEvent->uChar.UnicodeChar == L'\b' && Console->Mode & ENABLE_PROCESSED_INPUT)
|
|
{
|
|
/* backspace handling - if processed input enabled then we handle it here
|
|
* otherwise we treat it like a normal char. */
|
|
if (Pos > 0)
|
|
{
|
|
LineInputSetPos(Console, Pos - 1);
|
|
LineInputEdit(Console, 1, 0, NULL);
|
|
}
|
|
}
|
|
else if (KeyEvent->uChar.UnicodeChar == L'\r')
|
|
{
|
|
HistoryAddEntry(Console);
|
|
|
|
/* TODO: Expand aliases */
|
|
|
|
LineInputSetPos(Console, Console->LineSize);
|
|
Console->LineBuffer[Console->LineSize++] = L'\r';
|
|
if (Console->Mode & ENABLE_ECHO_INPUT)
|
|
ConioWriteConsole(Console, Console->ActiveBuffer, "\r", 1, TRUE);
|
|
|
|
/* Add \n if processed input. There should usually be room for it,
|
|
* but an exception to the rule exists: the buffer could have been
|
|
* pre-filled with LineMaxSize - 1 characters. */
|
|
if (Console->Mode & ENABLE_PROCESSED_INPUT &&
|
|
Console->LineSize < Console->LineMaxSize)
|
|
{
|
|
Console->LineBuffer[Console->LineSize++] = L'\n';
|
|
if (Console->Mode & ENABLE_ECHO_INPUT)
|
|
ConioWriteConsole(Console, Console->ActiveBuffer, "\n", 1, TRUE);
|
|
}
|
|
Console->LineComplete = TRUE;
|
|
Console->LinePos = 0;
|
|
}
|
|
else if (KeyEvent->uChar.UnicodeChar != L'\0')
|
|
{
|
|
if (KeyEvent->uChar.UnicodeChar < 0x20 &&
|
|
Console->LineWakeupMask & (1 << KeyEvent->uChar.UnicodeChar))
|
|
{
|
|
/* Control key client wants to handle itself (e.g. for tab completion) */
|
|
Console->LineBuffer[Console->LineSize++] = L' ';
|
|
Console->LineBuffer[Console->LinePos] = KeyEvent->uChar.UnicodeChar;
|
|
Console->LineComplete = TRUE;
|
|
Console->LinePos = 0;
|
|
}
|
|
else
|
|
{
|
|
/* Normal character */
|
|
BOOL Overstrike = Console->LineInsertToggle && Console->LinePos != Console->LineSize;
|
|
LineInputEdit(Console, Overstrike, 1, &KeyEvent->uChar.UnicodeChar);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* EOF */
|