Category : Files from Magazines
Archive   : DFLT18.ZIP
Filename : EDITBOX.C
#include "dflat.h"
#define EditBufLen(wnd) (isMultiLine(wnd) ? EDITLEN : ENTRYLEN)
#define SetLinePointer(wnd, ln) (wnd->CurrLine = ln)
#define Ch(c) ((c)&0x7f)
#define isWhite(c) (Ch(c)==' '||Ch(c)=='\n'||Ch(c)=='\f'||Ch(c)=='\t')
/* ---------- local prototypes ----------- */
static void SaveDeletedText(WINDOW, char *, int);
static void Forward(WINDOW);
static void Backward(WINDOW);
static void End(WINDOW);
static void Home(WINDOW);
static void Downward(WINDOW);
static void Upward(WINDOW);
static void StickEnd(WINDOW);
static void NextWord(WINDOW);
static void PrevWord(WINDOW);
static void ModTextPointers(WINDOW, int, int);
static void SetAnchor(WINDOW, int, int);
/* -------- local variables -------- */
static BOOL KeyBoardMarking, ButtonDown;
static BOOL TextMarking;
static int ButtonX, ButtonY;
static int PrevY = -1;
/* ----------- CREATE_WINDOW Message ---------- */
static int CreateWindowMsg(WINDOW wnd)
{
int rtn = BaseWndProc(EDITBOX, wnd, CREATE_WINDOW, 0, 0);
wnd->MaxTextLength = MAXTEXTLEN+1;
wnd->textlen = EditBufLen(wnd);
wnd->InsertMode = TRUE;
SendMessage(wnd, CLEARTEXT, 0, 0);
return rtn;
}
/* ----------- SETTEXT Message ---------- */
static int SetTextMsg(WINDOW wnd, PARAM p1)
{
int rtn = FALSE;
if (strlen((char *)p1) <= wnd->MaxTextLength) {
rtn = BaseWndProc(EDITBOX, wnd, SETTEXT, p1, 0);
wnd->TextChanged = FALSE;
}
return rtn;
}
/* ----------- CLEARTEXT Message ------------ */
static int ClearTextMsg(WINDOW wnd)
{
int rtn = BaseWndProc(EDITBOX, wnd, CLEARTEXT, 0, 0);
unsigned blen = EditBufLen(wnd)+2;
wnd->text = DFrealloc(wnd->text, blen);
memset(wnd->text, 0, blen);
wnd->wlines = 0;
wnd->CurrLine = 0;
wnd->CurrCol = 0;
wnd->WndRow = 0;
wnd->wleft = 0;
wnd->wtop = 0;
wnd->textwidth = 0;
wnd->TextChanged = FALSE;
return rtn;
}
/* ----------- ADDTEXT Message ---------- */
static int AddTextMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int rtn = FALSE;
if (strlen((char *)p1)+wnd->textlen <= wnd->MaxTextLength) {
rtn = BaseWndProc(EDITBOX, wnd, ADDTEXT, p1, p2);
if (rtn != FALSE) {
if (!isMultiLine(wnd)) {
wnd->CurrLine = 0;
wnd->CurrCol = strlen((char *)p1);
if (wnd->CurrCol >= ClientWidth(wnd)) {
wnd->wleft = wnd->CurrCol-ClientWidth(wnd);
wnd->CurrCol -= wnd->wleft;
}
wnd->BlkEndCol = wnd->CurrCol;
SendMessage(wnd, KEYBOARD_CURSOR,
WndCol, wnd->WndRow);
}
}
}
return rtn;
}
/* ----------- GETTEXT Message ---------- */
static int GetTextMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
char *cp1 = (char *)p1;
char *cp2 = wnd->text;
if (cp2 != NULL) {
while (p2-- && *cp2 && *cp2 != '\n')
*cp1++ = *cp2++;
*cp1 = '\0';
return TRUE;
}
return FALSE;
}
/* ----------- SETTEXTLENGTH Message ---------- */
static int SetTextLengthMsg(WINDOW wnd, unsigned int len)
{
if (++len < MAXTEXTLEN) {
wnd->MaxTextLength = len;
if (len < wnd->textlen) {
wnd->text=DFrealloc(wnd->text, len+2);
wnd->textlen = len;
*((wnd->text)+len) = '\0';
*((wnd->text)+len+1) = '\0';
BuildTextPointers(wnd);
}
return TRUE;
}
return FALSE;
}
/* ----------- KEYBOARD_CURSOR Message ---------- */
static void KeyboardCursorMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
wnd->CurrCol = (int)p1 + wnd->wleft;
wnd->WndRow = (int)p2;
wnd->CurrLine = (int)p2 + wnd->wtop;
if (wnd == inFocus) {
if (CharInView(wnd, (int)p1, (int)p2))
SendMessage(NULL, SHOW_CURSOR,
(wnd->InsertMode && !TextMarking), 0);
else
SendMessage(NULL, HIDE_CURSOR, 0, 0);
}
}
/* ----------- SIZE Message ---------- */
int SizeMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int rtn = BaseWndProc(EDITBOX, wnd, SIZE, p1, p2);
if (WndCol > ClientWidth(wnd)-1)
wnd->CurrCol = ClientWidth(wnd)-1 + wnd->wleft;
if (wnd->WndRow > ClientHeight(wnd)-1) {
wnd->WndRow = ClientHeight(wnd)-1;
SetLinePointer(wnd, wnd->WndRow+wnd->wtop);
}
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return rtn;
}
/* ----------- SCROLL Message ---------- */
static int ScrollMsg(WINDOW wnd, PARAM p1)
{
int rtn = FALSE;
if (isMultiLine(wnd)) {
rtn = BaseWndProc(EDITBOX,wnd,SCROLL,p1,0);
if (rtn != FALSE) {
if (p1) {
/* -------- scrolling up --------- */
if (wnd->WndRow == 0) {
wnd->CurrLine++;
StickEnd(wnd);
}
else
--wnd->WndRow;
}
else {
/* -------- scrolling down --------- */
if (wnd->WndRow == ClientHeight(wnd)-1) {
if (wnd->CurrLine > 0)
--wnd->CurrLine;
StickEnd(wnd);
}
else
wnd->WndRow++;
}
SendMessage(wnd,KEYBOARD_CURSOR,WndCol,wnd->WndRow);
}
}
return rtn;
}
/* ----------- HORIZSCROLL Message ---------- */
static int HorizScrollMsg(WINDOW wnd, PARAM p1)
{
int rtn = FALSE;
char *currchar = CurrChar;
if (!(p1 &&
wnd->CurrCol == wnd->wleft && *currchar == '\n')) {
rtn = BaseWndProc(EDITBOX, wnd, HORIZSCROLL, p1, 0);
if (rtn != FALSE) {
if (wnd->CurrCol < wnd->wleft)
wnd->CurrCol++;
else if (WndCol == ClientWidth(wnd))
--wnd->CurrCol;
SendMessage(wnd,KEYBOARD_CURSOR,WndCol,wnd->WndRow);
}
}
return rtn;
}
/* ----------- SCROLLPAGE Message ---------- */
static int ScrollPageMsg(WINDOW wnd, PARAM p1)
{
int rtn = FALSE;
if (isMultiLine(wnd)) {
rtn = BaseWndProc(EDITBOX, wnd, SCROLLPAGE, p1, 0);
SetLinePointer(wnd, wnd->wtop+wnd->WndRow);
StickEnd(wnd);
SendMessage(wnd, KEYBOARD_CURSOR,WndCol, wnd->WndRow);
}
return rtn;
}
/* ----------- HORIZSCROLLPAGE Message ---------- */
static int HorizPageMsg(WINDOW wnd, PARAM p1)
{
int rtn = BaseWndProc(EDITBOX, wnd, HORIZPAGE, p1, 0);
if ((int) p1 == FALSE) {
if (wnd->CurrCol > wnd->wleft+ClientWidth(wnd)-1)
wnd->CurrCol = wnd->wleft+ClientWidth(wnd)-1;
}
else if (wnd->CurrCol < wnd->wleft)
wnd->CurrCol = wnd->wleft;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return rtn;
}
/* ----- Extend the marked block to the new x,y position ---- */
static void ExtendBlock(WINDOW wnd, int x, int y)
{
int bbl, bel;
int ptop = min(wnd->BlkBegLine, wnd->BlkEndLine);
int pbot = max(wnd->BlkBegLine, wnd->BlkEndLine);
char *lp = TextLine(wnd, wnd->wtop+y);
int len = (int) (strchr(lp, '\n') - lp);
x = max(0, min(x, len));
y = max(0, y);
wnd->BlkEndCol = min(len, x+wnd->wleft);
wnd->BlkEndLine = y+wnd->wtop;
bbl = min(wnd->BlkBegLine, wnd->BlkEndLine);
bel = max(wnd->BlkBegLine, wnd->BlkEndLine);
while (ptop < bbl) {
WriteTextLine(wnd, NULL, ptop, FALSE);
ptop++;
}
for (y = bbl; y <= bel; y++)
WriteTextLine(wnd, NULL, y, FALSE);
while (pbot > bel) {
WriteTextLine(wnd, NULL, pbot, FALSE);
--pbot;
}
}
/* ----------- LEFT_BUTTON Message ---------- */
static int LeftButtonMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int MouseX = (int) p1 - GetClientLeft(wnd);
int MouseY = (int) p2 - GetClientTop(wnd);
RECT rc = ClientRect(wnd);
char *lp;
int len;
if (KeyBoardMarking)
return TRUE;
if (WindowMoving || WindowSizing)
return FALSE;
if (isMultiLine(wnd)) {
if (TextMarking) {
if (!InsideRect(p1, p2, rc)) {
int x = MouseX, y = MouseY;
int dir;
MESSAGE msg = 0;
if ((int)p2 == GetTop(wnd))
y++, dir = FALSE, msg = SCROLL;
else if ((int)p2 == GetBottom(wnd))
--y, dir = TRUE, msg = SCROLL;
else if ((int)p1 == GetLeft(wnd))
--x, dir = FALSE, msg = HORIZSCROLL;
else if ((int)p1 == GetRight(wnd))
x++, dir = TRUE, msg = HORIZSCROLL;
if (msg != 0) {
if (SendMessage(wnd, msg, dir, 0))
ExtendBlock(wnd, x, y);
SendMessage(wnd, PAINT, 0, 0);
}
}
return TRUE;
}
if (!InsideRect(p1, p2, rc))
return FALSE;
if (TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
if (wnd->wlines) {
if (MouseY > wnd->wlines-1)
return TRUE;
lp = TextLine(wnd, MouseY+wnd->wtop);
len = (int) (strchr(lp, '\n') - lp);
MouseX = min(MouseX, len);
if (MouseX < wnd->wleft) {
MouseX = 0;
SendMessage(wnd, KEYBOARD, HOME, 0);
}
ButtonDown = TRUE;
ButtonX = MouseX;
ButtonY = MouseY;
}
else
MouseX = MouseY = 0;
wnd->WndRow = MouseY;
SetLinePointer(wnd, MouseY+wnd->wtop);
}
if (isMultiLine(wnd) ||
(!TextBlockMarked(wnd)
&& MouseX+wnd->wleft < strlen(wnd->text)))
wnd->CurrCol = MouseX+wnd->wleft;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return TRUE;
}
/* ----------- MOUSE_MOVED Message ---------- */
static int MouseMovedMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int MouseX = (int) p1 - GetClientLeft(wnd);
int MouseY = (int) p2 - GetClientTop(wnd);
RECT rc = ClientRect(wnd);
if (!InsideRect(p1, p2, rc))
return FALSE;
if (MouseY > wnd->wlines-1)
return FALSE;
if (ButtonDown) {
SetAnchor(wnd, ButtonX+wnd->wleft, ButtonY+wnd->wtop);
TextMarking = TRUE;
rc = WindowRect(wnd);
SendMessage(NULL,MOUSE_TRAVEL,(PARAM) &rc, 0);
ButtonDown = FALSE;
}
if (TextMarking && !(WindowMoving || WindowSizing)) {
ExtendBlock(wnd, MouseX, MouseY);
return TRUE;
}
return FALSE;
}
static void StopMarking(WINDOW wnd)
{
TextMarking = FALSE;
if (wnd->BlkBegLine > wnd->BlkEndLine) {
swap(wnd->BlkBegLine, wnd->BlkEndLine);
swap(wnd->BlkBegCol, wnd->BlkEndCol);
}
if (wnd->BlkBegLine == wnd->BlkEndLine &&
wnd->BlkBegCol > wnd->BlkEndCol)
swap(wnd->BlkBegCol, wnd->BlkEndCol);
}
/* ----------- BUTTON_RELEASED Message ---------- */
static int ButtonReleasedMsg(WINDOW wnd)
{
if (isMultiLine(wnd)) {
ButtonDown = FALSE;
if (TextMarking && !(WindowMoving || WindowSizing)) {
/* release the mouse ouside the edit box */
SendMessage(NULL, MOUSE_TRAVEL, 0, 0);
StopMarking(wnd);
return TRUE;
}
else
PrevY = -1;
}
return FALSE;
}
/* ---- Process text block keys for multiline text box ---- */
static void DoMultiLines(WINDOW wnd, int c, PARAM p2)
{
if (isMultiLine(wnd) && !KeyBoardMarking) {
if ((int)p2 & (LEFTSHIFT | RIGHTSHIFT)) {
switch (c) {
case HOME:
case CTRL_HOME:
case CTRL_BS:
case PGUP:
case CTRL_PGUP:
case UP:
case BS:
case END:
case CTRL_END:
case PGDN:
case CTRL_PGDN:
case DN:
case FWD:
case CTRL_FWD:
KeyBoardMarking = TextMarking = TRUE;
SetAnchor(wnd, wnd->CurrCol, wnd->CurrLine);
break;
default:
break;
}
}
}
}
/* ---------- page/scroll keys ----------- */
static int DoScrolling(WINDOW wnd, int c, PARAM p2)
{
switch (c) {
case PGUP:
case PGDN:
if (isMultiLine(wnd))
BaseWndProc(EDITBOX, wnd, KEYBOARD, c, p2);
break;
case CTRL_PGUP:
case CTRL_PGDN:
BaseWndProc(EDITBOX, wnd, KEYBOARD, c, p2);
break;
case HOME:
Home(wnd);
break;
case END:
End(wnd);
break;
case CTRL_FWD:
NextWord(wnd);
break;
case CTRL_BS:
PrevWord(wnd);
break;
case CTRL_HOME:
if (isMultiLine(wnd)) {
SendMessage(wnd, SCROLLDOC, TRUE, 0);
wnd->CurrLine = 0;
wnd->WndRow = 0;
}
Home(wnd);
break;
case CTRL_END:
if (isMultiLine(wnd) &&
wnd->WndRow+wnd->wtop+1 < wnd->wlines
&& wnd->wlines > 0) {
SendMessage(wnd, SCROLLDOC, FALSE, 0);
SetLinePointer(wnd, wnd->wlines-1);
wnd->WndRow =
min(ClientHeight(wnd)-1, wnd->wlines-1);
Home(wnd);
}
End(wnd);
break;
case UP:
if (isMultiLine(wnd))
Upward(wnd);
break;
case DN:
if (isMultiLine(wnd))
Downward(wnd);
break;
case FWD:
Forward(wnd);
break;
case BS:
Backward(wnd);
break;
default:
return FALSE;
}
if (!KeyBoardMarking && TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return TRUE;
}
/* -------------- Del key ---------------- */
static void DelKey(WINDOW wnd)
{
char *currchar = CurrChar;
int repaint = *currchar == '\n';
if (TextBlockMarked(wnd)) {
SendMessage(wnd, COMMAND, ID_DELETETEXT, 0);
SendMessage(wnd, PAINT, 0, 0);
return;
}
if (isMultiLine(wnd) && *currchar == '\n' && *(currchar+1) == '\0')
return;
strcpy(currchar, currchar+1);
if (repaint) {
BuildTextPointers(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
else {
ModTextPointers(wnd, wnd->CurrLine+1, -1);
WriteTextLine(wnd, NULL, wnd->WndRow+wnd->wtop, FALSE);
}
wnd->TextChanged = TRUE;
}
/* ------------ Tab key ------------ */
static void TabKey(WINDOW wnd, PARAM p2)
{
if (isMultiLine(wnd)) {
int insmd = wnd->InsertMode;
do {
char *cc = CurrChar+1;
if (!insmd && *cc == '\0')
break;
if (wnd->textlen == wnd->MaxTextLength)
break;
SendMessage(wnd,KEYBOARD,insmd ? ' ' : FWD,0);
} while (wnd->CurrCol % cfg.Tabs);
}
else
PostMessage(GetParent(wnd), KEYBOARD, '\t', p2);
}
/* ------------ Shift+Tab key ------------ */
static void ShiftTabKey(WINDOW wnd, PARAM p2)
{
if (isMultiLine(wnd)) {
do {
if (CurrChar == GetText(wnd))
break;
SendMessage(wnd,KEYBOARD,BS,0);
} while (wnd->CurrCol % cfg.Tabs);
}
else
PostMessage(GetParent(wnd), KEYBOARD, SHIFT_HT, p2);
}
/* --------- All displayable typed keys ------------- */
static void KeyTyped(WINDOW wnd, int c)
{
char *currchar = CurrChar;
if ((c != '\n' && c < ' ') || (c & 0x1000))
/* ---- not recognized by editor --- */
return;
if (!isMultiLine(wnd) && TextBlockMarked(wnd)) {
SendMessage(wnd, CLEARTEXT, 0, 0);
currchar = CurrChar;
}
/* ---- test typing at end of text ---- */
if (currchar == wnd->text+wnd->MaxTextLength) {
/* ---- typing at the end of maximum buffer ---- */
beep();
return;
}
if (*currchar == '\0') {
/* --- insert a newline at end of text --- */
*currchar = '\n';
*(currchar+1) = '\0';
BuildTextPointers(wnd);
}
/* --- displayable char or newline --- */
if (c == '\n' || wnd->InsertMode || *currchar == '\n') {
/* ------ inserting the keyed character ------ */
if (wnd->text[wnd->textlen-1] != '\0') {
/* --- the current text buffer is full --- */
if (wnd->textlen == wnd->MaxTextLength) {
/* --- text buffer is at maximum size --- */
beep();
return;
}
/* ---- increase the text buffer size ---- */
wnd->textlen += GROWLENGTH;
/* --- but not above maximum size --- */
if (wnd->textlen > wnd->MaxTextLength)
wnd->textlen = wnd->MaxTextLength;
wnd->text = DFrealloc(wnd->text, wnd->textlen+2);
wnd->text[wnd->textlen-1] = '\0';
currchar = CurrChar;
}
memmove(currchar+1, currchar, strlen(currchar)+1);
ModTextPointers(wnd, wnd->CurrLine+1, 1);
if (isMultiLine(wnd) && wnd->wlines > 1)
wnd->textwidth = max(wnd->textwidth,
(int) (TextLine(wnd, wnd->CurrLine+1)-
TextLine(wnd, wnd->CurrLine)));
else
wnd->textwidth = max(wnd->textwidth,
strlen(wnd->text));
WriteTextLine(wnd, NULL,
wnd->wtop+wnd->WndRow, FALSE);
}
/* ----- put the char in the buffer ----- */
*currchar = c;
wnd->TextChanged = TRUE;
if (c == '\n') {
wnd->wleft = 0;
BuildTextPointers(wnd);
End(wnd);
Forward(wnd);
SendMessage(wnd, PAINT, 0, 0);
return;
}
/* ---------- test end of window --------- */
if (WndCol == ClientWidth(wnd)-1) {
if (!isMultiLine(wnd)) {
if (!(currchar == wnd->text+wnd->MaxTextLength-2))
SendMessage(wnd, HORIZSCROLL, TRUE, 0);
}
else {
char *cp = currchar;
while (*cp != ' ' && cp != TextLine(wnd, wnd->CurrLine))
--cp;
if (cp == TextLine(wnd, wnd->CurrLine) ||
!wnd->WordWrapMode)
SendMessage(wnd, HORIZSCROLL, TRUE, 0);
else {
int dif = 0;
if (c != ' ') {
dif = (int) (currchar - cp);
wnd->CurrCol -= dif;
SendMessage(wnd, KEYBOARD, DEL, 0);
--dif;
}
SendMessage(wnd, KEYBOARD, '\n', 0);
currchar = CurrChar;
wnd->CurrCol = dif;
if (c == ' ')
return;
}
}
}
/* ------ display the character ------ */
SetStandardColor(wnd);
PutWindowChar(wnd, c, WndCol, wnd->WndRow);
/* ----- advance the pointers ------ */
wnd->CurrCol++;
}
/* ------------ screen changing key strokes ------------- */
static void DoKeyStroke(WINDOW wnd, int c, PARAM p2)
{
switch (c) {
case RUBOUT:
if (wnd->CurrCol == 0 && wnd->CurrLine == 0)
break;
SendMessage(wnd, KEYBOARD, BS, 0);
SendMessage(wnd, KEYBOARD, DEL, 0);
break;
case DEL:
DelKey(wnd);
break;
case SHIFT_HT:
ShiftTabKey(wnd, p2);
break;
case '\t':
TabKey(wnd, p2);
break;
case '\r':
if (!isMultiLine(wnd)) {
PostMessage(GetParent(wnd), KEYBOARD, c, p2);
break;
}
c = '\n';
default:
if (TextBlockMarked(wnd)) {
SendMessage(wnd, COMMAND, ID_DELETETEXT, 0);
SendMessage(wnd, PAINT, 0, 0);
}
KeyTyped(wnd, c);
break;
}
}
/* ----------- KEYBOARD Message ---------- */
static int KeyboardMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int c = (int) p1;
if (WindowMoving || WindowSizing || ((int)p2 & ALTKEY))
return FALSE;
switch (c) {
/* --- these keys get processed by lower classes --- */
case ESC:
case F1:
case F2:
case F3:
case F4:
case F5:
case F6:
case F7:
case F8:
case F9:
case F10:
case INS:
case SHIFT_INS:
case SHIFT_DEL:
return FALSE;
/* --- these keys get processed here --- */
case CTRL_FWD:
case CTRL_BS:
case CTRL_HOME:
case CTRL_END:
case CTRL_PGUP:
case CTRL_PGDN:
break;
default:
/* other ctrl keys get processed by lower classes */
if ((int)p2 & CTRLKEY)
return FALSE;
/* --- all other keys get processed here --- */
break;
}
DoMultiLines(wnd, c, p2);
if (DoScrolling(wnd, c, p2)) {
if (KeyBoardMarking)
ExtendBlock(wnd, WndCol, wnd->WndRow);
}
else if (!TestAttribute(wnd, READONLY)) {
DoKeyStroke(wnd, c, p2);
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
}
else
beep();
return TRUE;
}
/* ----------- SHIFT_CHANGED Message ---------- */
static void ShiftChangedMsg(WINDOW wnd, PARAM p1)
{
if (!((int)p1 & (LEFTSHIFT | RIGHTSHIFT)) &&
KeyBoardMarking) {
StopMarking(wnd);
KeyBoardMarking = FALSE;
}
}
/* ----------- ID_DELETETEXT Command ---------- */
static void DeleteTextCmd(WINDOW wnd)
{
if (TextBlockMarked(wnd)) {
char *bbl=TextLine(wnd,wnd->BlkBegLine)+wnd->BlkBegCol;
char *bel=TextLine(wnd,wnd->BlkEndLine)+wnd->BlkEndCol;
int len = (int) (bel - bbl);
SaveDeletedText(wnd, bbl, len);
wnd->TextChanged = TRUE;
strcpy(bbl, bel);
wnd->CurrLine = TextLineNumber(wnd, bbl-wnd->BlkBegCol);
wnd->CurrCol = wnd->BlkBegCol;
wnd->WndRow = wnd->BlkBegLine - wnd->wtop;
if (wnd->WndRow < 0) {
wnd->wtop = wnd->BlkBegLine;
wnd->WndRow = 0;
}
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
ClearTextBlock(wnd);
BuildTextPointers(wnd);
}
}
/* ----------- ID_CLEAR Command ---------- */
static void ClearCmd(WINDOW wnd)
{
if (TextBlockMarked(wnd)) {
char *bbl=TextLine(wnd,wnd->BlkBegLine)+wnd->BlkBegCol;
char *bel=TextLine(wnd,wnd->BlkEndLine)+wnd->BlkEndCol;
int len = (int) (bel - bbl);
SaveDeletedText(wnd, bbl, len);
wnd->CurrLine = TextLineNumber(wnd, bbl);
wnd->CurrCol = wnd->BlkBegCol;
wnd->WndRow = wnd->BlkBegLine - wnd->wtop;
if (wnd->WndRow < 0) {
wnd->WndRow = 0;
wnd->wtop = wnd->BlkBegLine;
}
/* ------ change all text lines in block to \n ----- */
while (bbl < bel) {
char *cp = strchr(bbl, '\n');
if (cp > bel)
cp = bel;
strcpy(bbl, cp);
bel -= (int) (cp - bbl);
bbl++;
}
ClearTextBlock(wnd);
BuildTextPointers(wnd);
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
wnd->TextChanged = TRUE;
}
}
/* ----------- ID_UNDO Command ---------- */
static void UndoCmd(WINDOW wnd)
{
if (wnd->DeletedText != NULL) {
PasteText(wnd, wnd->DeletedText, wnd->DeletedLength);
free(wnd->DeletedText);
wnd->DeletedText = NULL;
wnd->DeletedLength = 0;
SendMessage(wnd, PAINT, 0, 0);
}
}
/* ----------- ID_PARAGRAPH Command ---------- */
static void ParagraphCmd(WINDOW wnd)
{
int bc, fl;
char *bl, *bbl, *bel, *bb;
ClearTextBlock(wnd);
/* ---- forming paragraph from cursor position --- */
fl = wnd->wtop + wnd->WndRow;
bbl = bel = bl = TextLine(wnd, wnd->CurrLine);
if ((bc = wnd->CurrCol) >= ClientWidth(wnd))
bc = 0;
Home(wnd);
/* ---- locate the end of the paragraph ---- */
while (*bel) {
int blank = TRUE;
char *bll = bel;
/* --- blank line marks end of paragraph --- */
while (*bel && *bel != '\n') {
if (*bel != ' ')
blank = FALSE;
bel++;
}
if (blank) {
bel = bll;
break;
}
if (*bel)
bel++;
}
if (bel == bbl) {
SendMessage(wnd, KEYBOARD, DN, 0);
return;
}
if (*bel == '\0')
--bel;
if (*bel == '\n')
--bel;
/* --- change all newlines in block to spaces --- */
while (CurrChar < bel) {
if (*CurrChar == '\n') {
*CurrChar = ' ';
wnd->CurrLine++;
wnd->CurrCol = 0;
}
else
wnd->CurrCol++;
}
/* ---- insert newlines at new margin boundaries ---- */
bb = bbl;
while (bbl < bel) {
bbl++;
if ((int)(bbl - bb) == ClientWidth(wnd)-1) {
while (*bbl != ' ' && bbl > bb)
--bbl;
if (*bbl != ' ') {
bbl = strchr(bbl, ' ');
if (bbl == NULL || bbl >= bel)
break;
}
*bbl = '\n';
bb = bbl+1;
}
}
BuildTextPointers(wnd);
/* --- put cursor back at beginning --- */
wnd->CurrLine = TextLineNumber(wnd, bl);
wnd->CurrCol = bc;
if (fl < wnd->wtop)
wnd->wtop = fl;
wnd->WndRow = fl - wnd->wtop;
SendMessage(wnd, PAINT, 0, 0);
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
wnd->TextChanged = TRUE;
BuildTextPointers(wnd);
}
/* ----------- COMMAND Message ---------- */
static int CommandMsg(WINDOW wnd, PARAM p1)
{
switch ((int)p1) {
case ID_DELETETEXT:
DeleteTextCmd(wnd);
return TRUE;
case ID_CLEAR:
ClearCmd(wnd);
return TRUE;
case ID_UNDO:
UndoCmd(wnd);
return TRUE;
case ID_PARAGRAPH:
ParagraphCmd(wnd);
return TRUE;
default:
break;
}
return FALSE;
}
/* ---------- CLOSE_WINDOW Message ----------- */
static int CloseWindowMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int rtn;
SendMessage(NULL, HIDE_CURSOR, 0, 0);
if (wnd->DeletedText != NULL)
free(wnd->DeletedText);
rtn = BaseWndProc(EDITBOX, wnd, CLOSE_WINDOW, p1, p2);
if (wnd->text != NULL) {
free(wnd->text);
wnd->text = NULL;
}
return rtn;
}
/* ------- Window processing module for EDITBOX class ------ */
int EditBoxProc(WINDOW wnd, MESSAGE msg, PARAM p1, PARAM p2)
{
int rtn;
switch (msg) {
case CREATE_WINDOW:
return CreateWindowMsg(wnd);
case ADDTEXT:
return AddTextMsg(wnd, p1, p2);
case SETTEXT:
return SetTextMsg(wnd, p1);
case CLEARTEXT:
return ClearTextMsg(wnd);
case GETTEXT:
return GetTextMsg(wnd, p1, p2);
case SETTEXTLENGTH:
return SetTextLengthMsg(wnd, (unsigned) p1);
case KEYBOARD_CURSOR:
KeyboardCursorMsg(wnd, p1, p2);
return TRUE;
case SETFOCUS:
if (!(int)p1)
SendMessage(NULL, HIDE_CURSOR, 0, 0);
case PAINT:
case MOVE:
rtn = BaseWndProc(EDITBOX, wnd, msg, p1, p2);
SendMessage(wnd,KEYBOARD_CURSOR,WndCol,wnd->WndRow);
return rtn;
case SIZE:
return SizeMsg(wnd, p1, p2);
case SCROLL:
return ScrollMsg(wnd, p1);
case HORIZSCROLL:
return HorizScrollMsg(wnd, p1);
case SCROLLPAGE:
return ScrollPageMsg(wnd, p1);
case HORIZPAGE:
return HorizPageMsg(wnd, p1);
case LEFT_BUTTON:
if (LeftButtonMsg(wnd, p1, p2))
return TRUE;
break;
case MOUSE_MOVED:
if (MouseMovedMsg(wnd, p1, p2))
return TRUE;
break;
case BUTTON_RELEASED:
if (ButtonReleasedMsg(wnd))
return TRUE;
break;
case KEYBOARD:
if (KeyboardMsg(wnd, p1, p2))
return TRUE;
break;
case SHIFT_CHANGED:
ShiftChangedMsg(wnd, p1);
break;
case COMMAND:
if (CommandMsg(wnd, p1))
return TRUE;
break;
case CLOSE_WINDOW:
return CloseWindowMsg(wnd, p1, p2);
default:
break;
}
return BaseWndProc(EDITBOX, wnd, msg, p1, p2);
}
/* ------ save deleted text for the Undo command ------ */
static void SaveDeletedText(WINDOW wnd, char *bbl, int len)
{
wnd->DeletedLength = len;
wnd->DeletedText=DFrealloc(wnd->DeletedText,len);
memmove(wnd->DeletedText, bbl, len);
}
/* ---- cursor right key: right one character position ---- */
static void Forward(WINDOW wnd)
{
char *cc = CurrChar+1;
if (*cc == '\0')
return;
if (*CurrChar == '\n') {
Home(wnd);
Downward(wnd);
}
else {
wnd->CurrCol++;
if (WndCol == ClientWidth(wnd))
SendMessage(wnd, HORIZSCROLL, TRUE, 0);
}
}
/* ----- stick the moving cursor to the end of the line ---- */
static void StickEnd(WINDOW wnd)
{
char *cp = TextLine(wnd, wnd->CurrLine);
char *cp1 = strchr(cp, '\n');
int len = cp1 ? (int) (cp1 - cp) : 0;
wnd->CurrCol = min(len, wnd->CurrCol);
if (wnd->wleft > wnd->CurrCol) {
wnd->wleft = max(0, wnd->CurrCol - 4);
SendMessage(wnd, PAINT, 0, 0);
}
else if (wnd->CurrCol-wnd->wleft >= ClientWidth(wnd)) {
wnd->wleft = wnd->CurrCol - (ClientWidth(wnd)-1);
SendMessage(wnd, PAINT, 0, 0);
}
}
/* --------- cursor down key: down one line --------- */
static void Downward(WINDOW wnd)
{
if (isMultiLine(wnd) &&
wnd->WndRow+wnd->wtop+1 < wnd->wlines) {
wnd->CurrLine++;
if (wnd->WndRow == ClientHeight(wnd)-1)
SendMessage(wnd, SCROLL, TRUE, 0);
wnd->WndRow++;
StickEnd(wnd);
}
}
/* -------- cursor up key: up one line ------------ */
static void Upward(WINDOW wnd)
{
if (isMultiLine(wnd) && wnd->CurrLine != 0) {
--wnd->CurrLine;
if (wnd->WndRow == 0)
SendMessage(wnd, SCROLL, FALSE, 0);
--wnd->WndRow;
StickEnd(wnd);
}
}
/* ---- cursor left key: left one character position ---- */
static void Backward(WINDOW wnd)
{
if (wnd->CurrCol) {
--wnd->CurrCol;
if (wnd->CurrCol < wnd->wleft)
SendMessage(wnd, HORIZSCROLL, FALSE, 0);
}
else if (isMultiLine(wnd) && wnd->CurrLine != 0) {
Upward(wnd);
End(wnd);
}
}
/* -------- End key: to end of line ------- */
static void End(WINDOW wnd)
{
while (*CurrChar && *CurrChar != '\n')
++wnd->CurrCol;
if (WndCol >= ClientWidth(wnd)) {
wnd->wleft = wnd->CurrCol - (ClientWidth(wnd)-1);
SendMessage(wnd, PAINT, 0, 0);
}
}
/* -------- Home key: to beginning of line ------- */
static void Home(WINDOW wnd)
{
wnd->CurrCol = 0;
if (wnd->wleft != 0) {
wnd->wleft = 0;
SendMessage(wnd, PAINT, 0, 0);
}
}
/* -- Ctrl+cursor right key: to beginning of next word -- */
static void NextWord(WINDOW wnd)
{
int savetop = wnd->wtop;
int saveleft = wnd->wleft;
ClearVisible(wnd);
while (!isWhite(*CurrChar)) {
char *cc = CurrChar+1;
if (*cc == '\0')
break;
Forward(wnd);
}
while (isWhite(*CurrChar)) {
char *cc = CurrChar+1;
if (*cc == '\0')
break;
Forward(wnd);
}
SetVisible(wnd);
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
if (wnd->wtop != savetop || wnd->wleft != saveleft)
SendMessage(wnd, PAINT, 0, 0);
}
/* -- Ctrl+cursor left key: to beginning of previous word -- */
static void PrevWord(WINDOW wnd)
{
int savetop = wnd->wtop;
int saveleft = wnd->wleft;
ClearVisible(wnd);
Backward(wnd);
while (isWhite(*CurrChar)) {
if (wnd->CurrLine == 0 && wnd->CurrCol == 0)
break;
Backward(wnd);
}
while (wnd->CurrCol != 0 && !isWhite(*CurrChar))
Backward(wnd);
if (isWhite(*CurrChar))
Forward(wnd);
SetVisible(wnd);
if (wnd->wleft != saveleft)
if (wnd->CurrCol >= saveleft)
if (wnd->CurrCol - saveleft < ClientWidth(wnd))
wnd->wleft = saveleft;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
if (wnd->wtop != savetop || wnd->wleft != saveleft)
SendMessage(wnd, PAINT, 0, 0);
}
/* ----- modify text pointers from a specified position
by a specified plus or minus amount ----- */
static void ModTextPointers(WINDOW wnd, int lineno, int var)
{
while (lineno < wnd->wlines)
*((wnd->TextPointers) + lineno++) += var;
}
/* ----- set anchor point for marking text block ----- */
static void SetAnchor(WINDOW wnd, int mx, int my)
{
ClearTextBlock(wnd);
/* ------ set the anchor ------ */
wnd->BlkBegLine = wnd->BlkEndLine = my;
wnd->BlkBegCol = wnd->BlkEndCol = mx;
SendMessage(wnd, PAINT, 0, 0);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/