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CICA 1993 April
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CICA MS Windows - April 1993.iso
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unzipped
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util
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mews11
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mswdrv.c
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C/C++ Source or Header
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1992-07-23
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22KB
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688 lines
/* The routines in this file provide drivers for display and input under
the Microsoft Windows environment on an IBM-PC or compatible
computer.
Must be compiled with Borland C++ 2.0 or MSC 6.0 or later versions.
It should not be compiled if the WINDOW_MSWIN symbol is not set */
#define termdef 1 /* don't define term external */
#include "estruct.h"
#include "elang.h"
#include <stdio.h>
#include <time.h>
#include "eproto.h"
#include "edef.h"
#include "mswin.h"
#define NPAUSE 1000 /* pause for fence-showing, 1 second */
#define MARGIN 8 /* size of minimal margin and */
#define SCRSIZ 20 /* scroll size for extended lines */
/* terminal interface table entries */
static int PASCAL mswnop();
static int PASCAL mswopen();
static int PASCAL mswgetc();
static int PASCAL mswputc();
static int PASCAL mswflush();
static int PASCAL mswbeep();
static int PASCAL mswmove();
static int PASCAL msweeol();
static int PASCAL msweeop();
static int PASCAL mswbeep();
static int PASCAL mswrev();
static int PASCAL mswrez();
#if COLOR
static int PASCAL mswsetfor();
static int PASCAL mswsetback();
#endif
static int PASCAL mswsleep();
static int PASCAL mswnewscr();
static int PASCAL mswdelscr();
static int PASCAL mswselscr();
static int PASCAL mswsizscr();
static int PASCAL mswtopscr();
/* Standard terminal interface dispatch table.
*/
NOSHARE TERM term = {
HUGE,
HUGE,
HUGE,
HUGE,
0,
0,
MARGIN,
SCRSIZ,
NPAUSE,
mswopen, /* t_open: Open terminal at the start */
mswnop, /* t_close: Close terminal at end */
mswnop, /* t_kopen: Open keyboard */
mswnop, /* t_kclose: close keyboard */
mswgetc, /* t_getchar: Get character from keyboard */
mswputc, /* t_putchar: Put character to display */
mswflush, /* t_flush: Flush output buffers */
mswmove, /* t_move: Move the cursor, origin 0 */
msweeol, /* t_eeol: Erase to end of line */
msweeop, /* t_eeop: Erase to end of page */
mswnop, /* t_clrdesk: Clear the page totally */
mswbeep, /* t_beep: Sound beep */
mswrev, /* t_rev: set reverse video state */
mswrez, /* t_rez: change screen resolution */
#if COLOR
mswsetfor, /* t_setfor: set forground color */
mswsetback, /* t_setback: set background color */
#endif
mswsleep, /* t_sleep: wait a while */
mswnewscr, /* t_newscr: create new "screen" display */
mswdelscr, /* t_delscr: destroy "screen" display */
mswselscr, /* t_selscr: select "screen" display for IO */
mswsizscr, /* t_sizscr: resize "screen" display */
mswtopscr /* t_topscr: bring "screen" to top */
};
#define MAXMLHIST 8 /* must be a power of 2 */
#define MLHISTMASK 0x7 /* corresponding bit mask */
static char *MLHistory[MAXMLHIST] = {NULL};
/* circular history of the last few message line entries */
static int MLHistOld = 0; /* index of the oldest message */
static int MLHistNew = 0; /* index of the first empty slot */
static HWND hIOWnd; /* current window where I/Os take place */
static int UpdateRow; /* Row being updated (-1 for no update) */
static struct {
int leftmost;
int rightmost; /* -1 indicates the range is empty */
} UpdateCol; /* Columns to invalidate on UpdateRow */
static SCREEN *IOScr; /* Screen affected by the I/Os */
static BOOL RevStatus; /* Reverse video flag */
#if COLOR
static int ForgColor; /* current selection of foreground and */
static int BackColor; /* background colors */
#endif
/* PushMLHist: store the last message line contents in the history */
/* ========== */
static void PASCAL PushMLHist (void)
{
char *ml;
int i, e;
for (e = MLSIZE - 1; e >= 0; e--) if (MLBuf[e] != ' ') break;
/* e = index of the last non-space char */
if (e < 0) return;
if ((ml = MLHistory[MLHistNew] = malloc (e + 2)) != NULL) {
for (i = 0; i <= e; i++) *ml++ = MLBuf[i];
*ml = '\0'; /* terminate the string */
MLHistNew = (MLHistNew + 1) & MLHISTMASK;
if (MLHistOld == MLHistNew) {
/* the history is full. This old entry needs to be discarded */
free (MLHistory[MLHistOld]);
MLHistOld = (MLHistOld + 1) & MLHISTMASK;
}
}
} /* PushMLHist */
/* MLHistDlgProc: dialog proc for the Message Line History */
/* ============= */
int EXPORT FAR PASCAL MLHistDlgProc (HWND hDlg, UINT wMsg,
UINT wParam, LONG lParam)
{
switch (wMsg) {
case WM_INITDIALOG:
{
char s[50];
strcpy (s, PROGNAME);
strcat (s, TEXT330);
SetWindowText (hDlg, s);
}
/*-fill the list box */
while (MLHistOld != MLHistNew) {
SendDlgItemMessage (hDlg, ID_HIST, LB_ADDSTRING, 0,
(DWORD)MLHistory[MLHistOld]);
free (MLHistory[MLHistOld]);
MLHistOld = (MLHistOld + 1) & MLHISTMASK;
}
/*-scroll the last message into view */
{
int i;
i = SendDlgItemMessage (hDlg, ID_HIST, LB_GETCOUNT, 0, 0L);
SendDlgItemMessage (hDlg, ID_HIST, LB_SETCURSEL, i - 1, 0L);
SendDlgItemMessage (hDlg, ID_HIST, LB_SETCURSEL, -1, 0L);
}
return TRUE;
case WM_COMMAND:
if (NOTIFICATION_CODE != BN_CLICKED) break;
if (LOWORD(wParam) == 1) {
EndDialog (hDlg, 0);
return TRUE;
}
break;
}
return FALSE;
} /* MLHistDlgProc */
/* mlhistory: displays the message line history box */
/* ========= */
/* This function is needed because the message line only shows the last
message. If a macro fails, it usually generates a slew of errors
(each beginning by a \n). Eventually, calling this function in the
core editor loop will pop up a dialog box showing up to MAXMLHIST-1
past messages */
PASCAL mlhistory (void)
{
FARPROC ProcInstance;
PushMLHist ();
mlferase ();
ProcInstance = MakeProcInstance ((FARPROC)MLHistDlgProc,
hEmacsInstance);
DialogBox (hEmacsInstance, "MLHIST", hFrameWnd, ProcInstance);
FreeProcInstance (ProcInstance);
} /* mlhistory */
static void PASCAL ChangeUpdateRow (int newrow)
/* Set UpdateRow to newrow, invalidating the changed cells in the
previous update row */
{
if ((UpdateCol.rightmost >= 0) && (UpdateRow >= 0)) {
InvalidateCells (hIOWnd, UpdateCol.leftmost, UpdateRow,
UpdateCol.rightmost, UpdateRow);
}
UpdateRow = newrow;
} /* ChangeUpdateRow */
/*****************************************/
/* mswopen: initialize windows interface */
/* ======= */
static int PASCAL mswopen ()
{
static BOOL FirstTime = TRUE;
if (FirstTime) {
int x;
revexist = TRUE;
eolexist = TRUE;
strcpy (sres, "MSWIN"); /* $SRES emacs variable */
MLBuf = (char*)malloc(MLSIZE);
for (x = 0; x < MLSIZE;) MLBuf[x++] = ' ';
FirstTime = FALSE;
}
UpdateRow = -1;
UpdateCol.rightmost = -1;
UpdateCol.leftmost = HUGE; /* empty range */
return 0;
} /* mswopen */
/***************************************************/
/* mswgetc: get character from keyboard (or mouse) */
/* ======= */
static int PASCAL mswgetc ()
{
return GetInput ();
} /* mswgetc */
/*************************************/
/* mswputc: put character to display */
/* ======= */
static int PASCAL mswputc (c)
int c; /* character to write (or 0 for dummy write) */
{
if (UpdateRow != CurrentRow) {
ChangeUpdateRow (CurrentRow);
UpdateCol.rightmost = -1;
UpdateCol.leftmost = HUGE; /* empty range */
}
/*-set the colors and reverse status in the display buffer */
if (hIOWnd != hFrameWnd) { /* not supported on message line */
register VIDEO *vp;
vp = IOScr->s_physical[UpdateRow];
vp->v_fcolor = ForgColor;
vp->v_bcolor = BackColor;
if (RevStatus) vp->v_flag |= VFREV;
else vp->v_flag &= ~VFREV;
}
/*-update the cursor's position and the UpdateCol range. Update the
message line buffer if that's where the fun is */
if (c != 0) {
if (CurrentCol < UpdateCol.leftmost) UpdateCol.leftmost = CurrentCol;
if (CurrentCol > UpdateCol.rightmost) UpdateCol.rightmost = CurrentCol;
if (hIOWnd == hFrameWnd) { /* message line */
if (c == '\b') {
if (CurrentCol > 0) MLBuf[--CurrentCol] = ' ';
}
else {
if (c == '\n') PushMLHist();
else {
MLBuf[CurrentCol] = c;
if (CurrentCol < MLSIZE - 1) ++CurrentCol;
}
}
}
else ++CurrentCol;
}
return 0;
} /* mswputc */
/**************************************************/
/* mswflush: update display from output buffer */
/* ======== */
static int PASCAL mswflush ()
{
ChangeUpdateRow (-1);
if (!InternalRequest && (hIOWnd == hFrameWnd)) UpdateWindow (hIOWnd);
/* note: we do not update screens in real time */
MoveEmacsCaret (hIOWnd, CurrentCol, CurrentRow);
/* some caret movement is directly handled by the driver (see
mswputc) */
return 0;
} /* mswflush */
/****************************/
/* mswmove: move the cursor */
/* ======= */
static int PASCAL mswmove (int newrow, int newcol)
{
/*-perform IO windows switching depending on the addressed row: if
beyond the IO screen, the message line is addressed*/
if (!IOScr || (newrow >= IOScr->s_nrow)) {
if (hIOWnd != hFrameWnd) {
ChangeUpdateRow (-1);
hIOWnd = hFrameWnd;
}
CurrentRow = 0;
}
else {
if (hIOWnd != IOScr->s_drvhandle) {
ChangeUpdateRow (-1);
hIOWnd = IOScr->s_drvhandle;
}
CurrentRow = newrow;
}
CurrentCol = newcol;
/*-update the caret */
MoveEmacsCaret (hIOWnd, CurrentCol, CurrentRow);
return 0;
} /* mswmove */
/*********************************/
/* msweeol: erase to end of line */
/* ======= */
static int PASCAL msweeol ()
{
mswputc (0); /* ensure change of row is properly handled */
UpdateCol.leftmost = min(UpdateCol.leftmost,CurrentCol);
if (hIOWnd == hFrameWnd) { /* message line */
int x;
for (x = CurrentCol; x < MLSIZE;) MLBuf[x++] = ' ';
UpdateCol.rightmost = MLSIZE - 1;
}
else {
UpdateCol.rightmost = IOScr->s_ncol;
}
mswflush ();
return 0;
} /* msweeol */
/*********************************/
/* msweeop: erase to end of page */
/* ======= */
static int PASCAL msweeop ()
{
if (hIOWnd == hFrameWnd) { /* message line */
msweeol (); /* only one line here */
return 0;
}
mswputc (0); /* ensure change of row is properly handled */
UpdateCol.leftmost = min(UpdateCol.leftmost,CurrentCol);
InvalidateCells (hIOWnd, UpdateCol.leftmost, UpdateRow,
IOScr->s_ncol, UpdateRow);
if (CurrentRow + 1 < IOScr->s_nrow) {
register int r;
register VIDEO *vp;
/*-propagate the colors and reverse status */
for (r = CurrentRow + 1; r < IOScr->s_nrow; r++) {
vp = IOScr->s_physical[r];
vp->v_fcolor = ForgColor;
vp->v_bcolor = BackColor;
if (RevStatus) vp->v_flag |= VFREV;
else vp->v_flag &= ~VFREV;
}
/*-flag the area for repaint */
InvalidateCells (hIOWnd, 0, CurrentRow + 1,
IOScr->s_ncol, IOScr->s_nrow);
}
mswflush ();
return 0;
} /* msweeop */
/*************************/
/* mswbeep: sound a beep */
/* ======= */
static int PASCAL mswbeep ()
{
MessageBeep (0);
return 0;
} /* mswbeep */
/************************************/
/* mswrev: set reverse video state */
/* ====== */
static int PASCAL mswrev (state)
int state; /* TRUE = reverse, FALSE = normal */
{
RevStatus = state;
return 0;
} /* mswrev */
/************************************/
/* mswrez: change "resolution" */
/* ====== */
static int PASCAL mswrez (res)
char *res;
{
return TRUE; /* $SRES is read-only in MSWIN, but returning an
error may break existing macros */
} /* mswrez */
#if COLOR
/* mswsetfor: set foreground color */
/* ========= */
static int PASCAL mswsetfor (color)
int color;
{
ForgColor = color;
return 0;
} /* mswsetfor */
/* mswsetback: set background color */
/* ========== */
static int PASCAL mswsetback (color)
int color;
{
BackColor = color;
return 0;
} /* mswsetback */
#endif
/* mswsleep: wait a specified time (in ms) in an unobtrusive way */
/* ======== */
static int PASCAL mswsleep (int t)
{
return TakeANap (t);
} /* mswsleep */
/* mswnewscr: create new MDI window for new screen */
/* ========= */
static int PASCAL mswnewscr (SCREEN *sp)
/* called by screen.c after the screen structure has been allocated. The
size of the screen will be determined by the window's size. returns
TRUE if successful. */
{
MDICREATESTRUCT cs;
BOOL Maximized;
#if WINDOW_MSWIN32
Maximized = (GetWindowLong((HWND)SendMessage (hMDIClientWnd,
WM_MDIGETACTIVE,
0, 0L),
GWL_STYLE) & WS_MAXIMIZE);
#else
Maximized = HIWORD(SendMessage (hMDIClientWnd, WM_MDIGETACTIVE, 0, 0L));
#endif
if (Maximized) {
restorescreen (FALSE, 0); /* de-maximize previous one */
}
if (first_screen == NULL) Maximized = TRUE;
cs.szClass = ScreenClassName;
cs.szTitle = sp->s_screen_name;
cs.hOwner = hEmacsInstance;
cs.x = CW_USEDEFAULT;
cs.y = CW_USEDEFAULT;
cs.cx = CW_USEDEFAULT;
cs.cy = CW_USEDEFAULT;
if (Maximized) cs.style = WS_MAXIMIZE;
else cs.style = 0;
cs.style |= WS_HSCROLL | WS_VSCROLL;
cs.lParam = (DWORD)sp;
sp->s_virtual = NULL; /* not NULL will testify of success */
InternalRequest = TRUE;
SendMessage (hMDIClientWnd, WM_MDICREATE, 0, (DWORD)(LPSTR)&cs);
if (sp->s_virtual) {
if (hFrameWnd == GetActiveWindow ()) SetFocus (sp->s_drvhandle);
}
InternalRequest = FALSE;
if (!sp->s_virtual) {
mswdelscr (sp); /* failed, cleanup! */
return FALSE;
}
return TRUE;
} /* mswnewscr */
/* mswdelscr: destroys an MDI window for a disappearing screen */
/* ========= */
static int PASCAL mswdelscr (SCREEN *sp)
/* called by screen.c before the screen structure is deallocated */
{
if (sp->s_drvhandle == hIOWnd) mswflush ();
if (sp == IOScr) mswselscr (first_screen);
/* hopefully, at this time, sp!=first_screen */
SendMessage (hMDIClientWnd, WM_MDIDESTROY, (UINT)sp->s_drvhandle, 0L);
} /* mswdelscr */
/* mswselscr: select a window/screen combination for the next IOs */
/* ========= */
static int PASCAL mswselscr (SCREEN *sp)
{
hIOWnd = sp->s_drvhandle;
IOScr = sp;
} /* mswselscr */
/* mswsizscr: resize an MDI window to fit the associated screen */
/* ========= */
static int PASCAL mswsizscr (SCREEN *sp)
/* called by Emacs when the screen's dimensions have been changed. A resize
through the MS-Windows interface is handled by the ReSize function in
mswdisp.c */
{
HWND hScrWnd;
BOOL Maximized;
int RetryCount = -1; /* prevents infinite loop if frame
window can't be resized properly */
BOOL FrameIconic;
#if !WIN30SDK
WINDOWPLACEMENT WindowPlacement;
#endif
if (InternalRequest) return;
InternalRequest = TRUE;
hScrWnd = sp->s_drvhandle;
{ /*-If this is iconized, we have to restore it first to be
allowed to change its size. If it is the active MDI child and
is maximized, we will actually resize the frame window so, if
the later is maximized, we restore it first. */
#if WINDOW_MSWIN32
HWND hActiveScr;
hActiveScr = (HWND)SendMessage (hMDIClientWnd, WM_MDIGETACTIVE, 0, 0L);
Maximized = (hScrWnd == hActiveScr) &&
(GetWindowLong(hScrWnd, GWL_STYLE) & WS_MAXIMIZE);
#else
DWORD ActiveScr;
ActiveScr = SendMessage (hMDIClientWnd, WM_MDIGETACTIVE, 0, 0L);
Maximized = (hScrWnd == LOWORD(ActiveScr)) && HIWORD(ActiveScr);
#endif
if (IsIconic (hScrWnd)) {
SendMessage (hMDIClientWnd, WM_MDIRESTORE, (UINT)hScrWnd, 0L);
}
if (Maximized && IsZoomed (hFrameWnd)) {
ShowWindow (hFrameWnd, SW_RESTORE);
}
}
FrameIconic = IsIconic (hFrameWnd);
do {/*-Now, proceed with resizing... */
int Delta;
RECT TargetRect, BoundingRect; /* in MDIClient coordinates */
RECT OldClientRect;
POINT ClientSize;
GetClientRect (hScrWnd, &OldClientRect);
MinimumClientSize (hScrWnd, sp->s_ncol, sp->s_nrow,
&ClientSize.x, &ClientSize.y);
if (Maximized) {
if (((OldClientRect.bottom == ClientSize.y)
&& (OldClientRect.right == ClientSize.x))
|| (RetryCount > 0)) break; /* exit the resize loop */
++RetryCount;
BoundingRect.left = BoundingRect.top = 0;
BoundingRect.right = GetSystemMetrics (SM_CXSCREEN);
BoundingRect.bottom = GetSystemMetrics (SM_CYSCREEN);
#if WIN30SDK
{
#else
if (FrameIconic && Win31API) {
GetWindowPlacement (hFrameWnd, &WindowPlacement);
TargetRect = WindowPlacement.rcNormalPosition;
}
else {
#endif
GetWindowRect (hFrameWnd, &TargetRect);
}
}
else {
GetClientRect (hMDIClientWnd, &BoundingRect);
GetWindowRect (hScrWnd, &TargetRect);
ScreenToClient (hMDIClientWnd, (LPPOINT)&TargetRect.right);
ScreenToClient (hMDIClientWnd, (LPPOINT)&TargetRect.left);
}
/*-process change of width: we move the right edge. If it would
go off bounds, we move the left edge back to compensate, but
never below 0 */
Delta = ClientSize.x - OldClientRect.right;
if ((TargetRect.right + Delta) > BoundingRect.right) {
TargetRect.left += (BoundingRect.right - TargetRect.right)
- Delta;
TargetRect.right = BoundingRect.right;
if (TargetRect.left < 0) {
TargetRect.right -= TargetRect.left;
TargetRect.left = 0;
}
}
else TargetRect.right += Delta;
/*-process change of height: we move the bottom edge. If it
would go off screen, we move the top edge up to compensate,
but never beyond 0 */
Delta = ClientSize.y - OldClientRect.bottom;
if ((TargetRect.bottom + Delta) > BoundingRect.bottom) {
TargetRect.top += (BoundingRect.bottom - TargetRect.bottom)
- Delta;
TargetRect.bottom = BoundingRect.bottom;
if (TargetRect.top < 0) {
TargetRect.bottom -= TargetRect.top;
TargetRect.top = 0;
}
}
else TargetRect.bottom += Delta;
#if WIN30SDK
{
#else
if (Maximized && FrameIconic && Win31API) {
WindowPlacement.rcNormalPosition = TargetRect;
SetWindowPlacement (hFrameWnd, &WindowPlacement);
}
else {
#endif
SetWindowPos (Maximized ? hFrameWnd : hScrWnd, 0,
TargetRect.left, TargetRect.top,
TargetRect.right - TargetRect.left,
TargetRect.bottom - TargetRect.top,
SWP_DRAWFRAME | SWP_NOZORDER);
}
} while (Maximized); /* if Maximized, we loop once in case a
change of menu bar height has prevented
us from getting the expected client size
*/
InternalRequest = FALSE;
} /* mswsizscr */
/* mswtopscr: bring a screen's window to top. */
/* ========= */
static int PASCAL mswtopscr (SCREEN *sp)
/* called by screen.c when selecting a screen for current */
{
if (!InternalRequest) {
InternalRequest = TRUE;
SendMessage (hMDIClientWnd, WM_MDIACTIVATE,
(UINT)sp->s_drvhandle, 0L);
#if WINDOW_MSWIN32
if (GetWindowLong(sp->s_drvhandle, GWL_STYLE) & WS_MAXIMIZE) {
#else
if (HIWORD(SendMessage (hMDIClientWnd, WM_MDIGETACTIVE, 0, 0L))) {
#endif
/* we have a maximized screen. Since we activated it under
InternalRequest, the new size has not yet been processed
by emacs, so we have to fix that */
newwidth (TRUE, DisplayableColumns (sp->s_drvhandle, 0, &EmacsCM));
newsize (TRUE, DisplayableRows (sp->s_drvhandle, 0, &EmacsCM));
}
InternalRequest = FALSE;
}
} /* mswtopscr */
/*************************/
/* mswnop: No Operation */
/* ====== */
static int PASCAL mswnop ()
{
return 0;
}