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Night Owl's Shareware - PDSI-006 - Night Owl Corp (1990).iso
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dflat8.zip
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EDITBOX.C
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1991-09-30
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1,164 lines
/* ------------- editbox.c ------------ */
#include "dflat.h"
#define EDITBUFFERLENGTH 1024
#define ENTRYBUFFERLENGTH 256
#define GROWLENGTH 64
#define EditBufLen(wnd) (isMultiLine(wnd) ? EDITBUFFERLENGTH : ENTRYBUFFERLENGTH)
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 UpLine(WINDOW);
static void DownLine(WINDOW);
static void NextWord(WINDOW);
static void PrevWord(WINDOW);
static void ResetEditBox(WINDOW);
static void AddTextPointers(WINDOW, int, int);
#define SetLinePointer(wnd, ln) (wnd->CurrLine = ln)
static int KeyBoardMarking, ButtonDown;
int TextMarking;
static int bx, by;
static int py = -1;
char *Clipboard;
int ClipboardLength;
static int CreateWindowMsg(WINDOW wnd)
{
int rtn = BaseWndProc(EDITBOX, wnd, CREATE_WINDOW, 0, 0);
wnd->text = calloc(1, EditBufLen(wnd)+2);
wnd->textlen = EditBufLen(wnd);
wnd->InsertMode = TRUE;
ResetEditBox(wnd);
return rtn;
}
static int AddTextMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int rtn = BaseWndProc(EDITBOX, wnd, ADDTEXT, p1, p2);
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);
}
BuildTextPointers(wnd);
return rtn;
}
static int KeyboardCursorMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int rtn;
wnd->CurrCol = (int)p1 + wnd->wleft;
wnd->WndRow = (int)p2;
wnd->CurrLine = (int)p2 + wnd->wtop;
rtn = BaseWndProc(EDITBOX, wnd, KEYBOARD_CURSOR, p1, p2);
if (wnd == inFocus) {
if (!CharInView(wnd, (int)p1, (int)p2))
SendMessage(NULL, HIDE_CURSOR, 0, 0);
else
SendMessage(NULL, SHOW_CURSOR, wnd->InsertMode, 0);
}
return rtn;
}
static int SetFocusMsg(WINDOW wnd, PARAM p1)
{
int rtn = BaseWndProc(EDITBOX, wnd, SETFOCUS, p1, 0);
if (p1) {
SendMessage(NULL, SHOW_CURSOR, wnd->InsertMode, 0);
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
}
else
SendMessage(NULL, HIDE_CURSOR, 0, 0);
return rtn;
}
static void ShiftChangedMsg(WINDOW wnd, PARAM p1)
{
if (!((int)p1 & (LEFTSHIFT | RIGHTSHIFT)) && KeyBoardMarking) {
SendMessage(wnd, BUTTON_RELEASED, 0, 0);
KeyBoardMarking = FALSE;
}
}
static void GetTextMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
char *cp1 = (char *)p1;
char *cp2 = wnd->text;
while (p2-- && *cp2 && *cp2 != '\n')
*cp1++ = *cp2++;
*cp1 = '\0';
}
static void LeftButtonMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int mx = (int) p1 - GetClientLeft(wnd);
int my = (int) p2 - GetClientTop(wnd);
char *lp;
int len;
if (isMultiLine(wnd)) {
if (TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
if (wnd->wlines) {
if (my > wnd->wlines-1)
return;
lp = TextLine(wnd, my+wnd->wtop);
len = (int) (strchr(lp, '\n') - lp);
mx = min(mx, len);
if (mx < wnd->wleft) {
mx = 0;
SendMessage(wnd, KEYBOARD, HOME, 0);
}
ButtonDown = TRUE;
bx = mx;
by = my;
}
else
mx = my = 0;
wnd->WndRow = my;
SetLinePointer(wnd, my+wnd->wtop);
}
if (isMultiLine(wnd) ||
(!TextBlockMarked(wnd)
&& mx+wnd->wleft < strlen(wnd->text)))
wnd->CurrCol = mx+wnd->wleft;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
}
static int MouseMovedMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int mx = (int) p1 - GetClientLeft(wnd);
int my = (int) p2 - GetClientTop(wnd);
if (my > wnd->wlines-1)
return FALSE;
if (ButtonDown) {
SetAnchor(wnd, bx+wnd->wleft, by+wnd->wtop);
TextMarking = TRUE;
SendMessage(wnd, CAPTURE_MOUSE, TRUE, 0);
ButtonDown = FALSE;
}
if (TextMarking && !(WindowMoving || WindowSizing)) {
int ptop;
int pbot;
char *lp;
int len;
int y;
int bbl, bel;
RECT rc = ClientRect(wnd);
if (!InsideRect(p1, p2, rc)) {
int hs = -1, sc = -1;
if (p1 < GetClientLeft(wnd)) {
hs = FALSE;
p1 = GetClientLeft(wnd);
}
if (p1 > GetClientRight(wnd)) {
hs = TRUE;
p1 = GetClientRight(wnd);
}
if (p2 < GetClientTop(wnd)) {
sc = FALSE;
p2 = GetClientTop(wnd);
}
if (p2 > GetClientBottom(wnd)) {
sc = TRUE;
p2 = GetClientBottom(wnd);
}
SendMessage(NULL, MOUSE_CURSOR, p1, p2);
if (sc != -1)
SendMessage(wnd, SCROLL, sc, 0);
if (hs != -1)
SendMessage(wnd, HORIZSCROLL, hs, 0);
mx = (int) p1 - GetClientLeft(wnd);
my = (int) p2 - GetClientTop(wnd);
}
ptop = min(wnd->BlkBegLine, wnd->BlkEndLine);
pbot = max(wnd->BlkBegLine, wnd->BlkEndLine);
lp = TextLine(wnd, wnd->wtop+my);
len = (int) (strchr(lp, '\n') - lp);
mx = min(mx, len-wnd->wleft);
wnd->BlkEndCol = mx+wnd->wleft;
wnd->BlkEndLine = my+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;
}
return TRUE;
}
return FALSE;
}
static int ButtonReleasedMsg(WINDOW wnd)
{
if (isMultiLine(wnd)) {
ButtonDown = FALSE;
if (TextMarking && !(WindowMoving || WindowSizing)) {
PostMessage(wnd, RELEASE_MOUSE, 0, 0);
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);
return TRUE;
}
else
py = -1;
}
return FALSE;
}
static int ScrollMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int rtn = FALSE;
if (isMultiLine(wnd)) {
if ((rtn = BaseWndProc(EDITBOX, wnd, SCROLL, p1, 0)) != FALSE) {
if (p1) {
/* -------- scrolling up --------- */
if (wnd->WndRow == 0) {
DownLine(wnd);
StickEnd(wnd);
}
else
--wnd->WndRow;
}
else {
/* -------- scrolling down --------- */
if (wnd->WndRow == ClientHeight(wnd)-1) {
UpLine(wnd);
StickEnd(wnd);
}
else
wnd->WndRow++;
}
if (!(int)p2)
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
}
}
return rtn;
}
static int HorizScrollMsg(WINDOW wnd, PARAM p1)
{
int rtn = FALSE;
char *currchar = CurrChar;
if (!(p1 && wnd->CurrCol == wnd->wleft && *currchar == '\n')) {
if ((rtn = BaseWndProc(EDITBOX, wnd, HORIZSCROLL, p1, 0)) != FALSE) {
if (wnd->CurrCol < wnd->wleft)
wnd->CurrCol++;
else if (WndCol == ClientWidth(wnd))
--wnd->CurrCol;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
}
}
return rtn;
}
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;
}
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;
}
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;
}
static void DoMultiLines(WINDOW wnd, int c, PARAM p2)
{
if (isMultiLine(wnd)) {
if ((int)p2 & (LEFTSHIFT | RIGHTSHIFT)) {
int kx, ky;
SendMessage(NULL, CURRENT_KEYBOARD_CURSOR,
(PARAM) &kx, (PARAM) &ky);
kx -= GetClientLeft(wnd);
ky -= GetClientTop(wnd);
switch (c) {
case HOME:
case END:
case PGUP:
case PGDN:
case CTRL_PGUP:
case CTRL_PGDN:
case UP:
case DN:
case FWD:
case BS:
case CTRL_FWD:
case CTRL_BS:
if (!KeyBoardMarking) {
if (TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
KeyBoardMarking = TextMarking = TRUE;
SetAnchor(wnd, kx+wnd->wleft, ky+wnd->wtop);
}
break;
default:
break;
}
}
else if (((c != DEL && c != RUBOUT) ||
!isMultiLine(wnd)) && TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
}
}
static void 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->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))
break;
Upward(wnd);
break;
case DN:
if (!isMultiLine(wnd))
break;
Downward(wnd);
break;
case FWD:
Forward(wnd);
break;
case BS:
Backward(wnd);
break;
default:
break;
}
}
static int MovementKey(WINDOW wnd, int c)
{
if (!isMultiLine(wnd) && TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
if (c != RUBOUT || (wnd->CurrLine == 0 && wnd->CurrCol == 0))
return TRUE;
Backward(wnd);
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return FALSE;
}
static int 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 TRUE;
}
if (*(currchar+1) == '\0')
return TRUE;
strcpy(currchar, currchar+1);
if (repaint) {
BuildTextPointers(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
else {
AddTextPointers(wnd, wnd->CurrLine+1, -1);
WriteTextLine(wnd, NULL, wnd->WndRow+wnd->wtop, FALSE);
}
wnd->TextChanged = TRUE;
return FALSE;
}
static int TabKey(WINDOW wnd, PARAM p2)
{
if (isMultiLine(wnd)) {
int insmd = wnd->InsertMode;
do {
char *cc = CurrChar+1;
if (!insmd && *cc == '\0')
break;
SendMessage(wnd, KEYBOARD,
insmd ? ' ' : FWD, 0);
} while (wnd->CurrCol % cfg.Tabs);
return TRUE;
}
PostMessage(GetParent(wnd), KEYBOARD, '\t', p2);
return FALSE;
}
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)) {
ResetEditBox(wnd);
ClearTextBlock(wnd);
currchar = CurrChar;
}
if (*currchar == '\0') {
/* ---- typing at end of text ---- */
*currchar = '\n';
*(currchar+1) = '\0';
BuildTextPointers(wnd);
}
/* --- displayable char or newline --- */
if (c == '\n' || wnd->InsertMode || *currchar == '\n') {
if (wnd->text[wnd->textlen-1] != '\0') {
wnd->textlen += GROWLENGTH;
wnd->text = realloc(wnd->text, wnd->textlen+2);
wnd->text[wnd->textlen-1] = '\0';
currchar = CurrChar;
}
/* ------ insert mode ------ */
memmove(currchar+1, currchar, strlen(currchar)+1);
AddTextPointers(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) {
int dif;
char *cp = currchar;
while (*cp != ' ' && cp != TextLine(wnd, wnd->CurrLine))
--cp;
if (!isMultiLine(wnd) || cp == TextLine(wnd, wnd->CurrLine) ||
!wnd->WordWrapMode)
SendMessage(wnd, HORIZSCROLL, TRUE, 0);
else {
dif = 0;
if (c != ' ') {
dif = (int) (currchar - cp);
wnd->CurrCol -= dif;
SendMessage(wnd, KEYBOARD, DEL, 0);
--dif;
}
SendMessage(wnd, KEYBOARD, '\r', 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++;
}
static int DoKeyStroke(WINDOW wnd, int c, PARAM p2)
{
switch (c) {
case HOME:
case END:
case PGUP:
case PGDN:
case CTRL_PGUP:
case CTRL_PGDN:
case FWD:
case BS:
case CTRL_FWD:
case CTRL_BS:
case CTRL_HOME:
case CTRL_END:
case RUBOUT:
if (MovementKey(wnd, c))
break;
case DEL:
if (DelKey(wnd))
return TRUE;
break;
case CTRL_FIVE: /* same as Shift+Tab */
if (!((int)p2 & (LEFTSHIFT | RIGHTSHIFT)))
break;
case UP:
case DN:
if (!isMultiLine(wnd))
PostMessage(GetParent(wnd), KEYBOARD, c, p2);
break;
case '\t':
if (TabKey(wnd, p2))
return TRUE;
break;
case '\r':
if (!isMultiLine(wnd)) {
PostMessage(GetParent(wnd), KEYBOARD, c, p2);
break;
}
c = '\n';
default:
KeyTyped(wnd, c);
break;
}
return FALSE;
}
static int KeyboardMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int c;
/* --- alt keys get processed by lower classes --- */
if ((int)p2 & ALTKEY)
return FALSE;
c = (int) p1;
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);
DoScrolling(wnd, c, p2);
if (KeyBoardMarking) {
int kx, ky;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
SendMessage(NULL, CURRENT_KEYBOARD_CURSOR,
(PARAM) &kx, (PARAM) &ky);
SendMessage(wnd, MOUSE_MOVED, kx, ky);
return TRUE;
}
if (!TestAttribute(wnd, READONLY))
if (DoKeyStroke(wnd, c, p2))
return TRUE;
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return TRUE;
}
static void DeleteTextCmd(WINDOW wnd)
{
char *bbl, *bel;
int len;
if (TextBlockMarked(wnd)) {
bbl = TextLine(wnd, wnd->BlkBegLine) + wnd->BlkBegCol;
bel = TextLine(wnd, wnd->BlkEndLine) + wnd->BlkEndCol;
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);
}
static void ClearCmd(WINDOW wnd)
{
char *bbl, *bel;
int len;
if (TextBlockMarked(wnd)) {
bbl = TextLine(wnd, wnd->BlkBegLine) + wnd->BlkBegCol;
bel = TextLine(wnd, wnd->BlkEndLine) + wnd->BlkEndCol;
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;
}
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);
SendMessage(wnd, PAINT, 0, 0);
wnd->TextChanged = TRUE;
}
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);
}
}
static void ParagraphCmd(WINDOW wnd)
{
char *bl;
int bc, ec;
int fl, el;
int Blocked;
char *bbl, *bel, *bb;
el = wnd->BlkEndLine;
ec = wnd->BlkEndCol;
if (!TextBlockMarked(wnd)) {
Blocked = FALSE;
/* ---- forming paragraph from cursor position --- */
fl = wnd->wtop + wnd->WndRow;
bl = TextLine(wnd, wnd->CurrLine);
bc = wnd->CurrCol;
Home(wnd);
bbl = bel = bl;
if (bc >= ClientWidth(wnd))
bc = 0;
/* ---- 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;
}
else {
bbl = TextLine(wnd, wnd->BlkBegLine) + wnd->BlkBegCol;
bel = TextLine(wnd, wnd->BlkEndLine) + wnd->BlkEndCol;
Blocked = TRUE;
/* ---- forming paragraph from marked block --- */
fl = wnd->BlkBegLine;
bc = wnd->CurrCol = wnd->BlkBegCol;
wnd->CurrLine = fl;
if (fl < wnd->wtop)
wnd->wtop = fl;
wnd->WndRow = fl - wnd->wtop;
SendMessage(wnd, KEYBOARD, '\r', 0);
el++, fl++;
if (bc != 0) {
SendMessage(wnd, KEYBOARD, '\r', 0);
el++, fl ++;
}
bc = 0;
bl = TextLine(wnd, fl);
wnd->CurrLine = fl;
bbl = bl + bc;
bel = TextLine(wnd, el) + ec;
}
/* --- 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;
}
}
ec = (int)(bel - bb);
BuildTextPointers(wnd);
if (Blocked) {
/* ---- position cursor at end of new paragraph ---- */
if (el < wnd->wtop ||
wnd->wtop + ClientHeight(wnd) < el)
wnd->wtop = el-ClientHeight(wnd);
if (wnd->wtop < 0)
wnd->wtop = 0;
wnd->WndRow = el - wnd->wtop;
wnd->CurrLine = el;
wnd->CurrCol = ec;
SendMessage(wnd, KEYBOARD, '\r', 0);
SendMessage(wnd, KEYBOARD, '\r', 0);
}
else {
/* --- 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);
}
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;
}
int EditBoxProc(WINDOW wnd, MESSAGE msg, PARAM p1, PARAM p2)
{
int rtn;
RECT rc;
rc = ClientRect(wnd);
switch (msg) {
case CREATE_WINDOW:
return CreateWindowMsg(wnd);
case ADDTEXT:
return AddTextMsg(wnd, p1, p2);
case SETTEXT:
rtn = BaseWndProc(EDITBOX, wnd, msg, p1, p2);
wnd->CurrLine = 0;
return rtn;
case CLEARTEXT:
ResetEditBox(wnd);
ClearTextPointers(wnd);
break;
case KEYBOARD_CURSOR:
return KeyboardCursorMsg(wnd, p1, p2);
case EB_GETTEXT:
GetTextMsg(wnd, p1, p2);
return TRUE;
case EB_PUTTEXT:
SendMessage(wnd, CLEARTEXT, 0, 0);
SendMessage(wnd, ADDTEXT, p1, p2);
return TRUE;
case SETFOCUS:
return SetFocusMsg(wnd, p1);
case SHIFT_CHANGED:
ShiftChangedMsg(wnd, p1);
break;
case DOUBLE_CLICK:
if (KeyBoardMarking)
return TRUE;
break;
case LEFT_BUTTON:
if (KeyBoardMarking || TextMarking)
return TRUE;
if (WindowMoving || WindowSizing)
break;
if (!InsideRect(p1, p2, rc))
break;
LeftButtonMsg(wnd, p1, p2);
return TRUE;
case MOUSE_MOVED:
if (MouseMovedMsg(wnd, p1, p2))
return TRUE;
break;
case BUTTON_RELEASED:
if (ButtonReleasedMsg(wnd))
return TRUE;
break;
case PAINT:
rtn = BaseWndProc(EDITBOX, wnd, msg, p1, p2);
if (isVisible(wnd))
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
return rtn;
case SCROLL:
return ScrollMsg(wnd, p1, p2);
case HORIZSCROLL:
return HorizScrollMsg(wnd, p1);
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 SCROLLPAGE:
return ScrollPageMsg(wnd, p1);
case HORIZPAGE:
return HorizPageMsg(wnd, p1);
case KEYBOARD:
if (WindowMoving || WindowSizing)
break;
if (KeyboardMsg(wnd, p1, p2))
return TRUE;
break;
case COMMAND:
if (CommandMsg(wnd, p1))
return TRUE;
break;
case CLOSE_WINDOW:
SendMessage(NULL, HIDE_CURSOR, 0, 0);
if (wnd->DeletedText != NULL)
free(wnd->DeletedText);
break;
default:
break;
}
return BaseWndProc(EDITBOX, wnd, msg, p1, p2);
}
static void SaveDeletedText(WINDOW wnd, char *bbl, int len)
{
wnd->DeletedLength = len;
if ((wnd->DeletedText = realloc(wnd->DeletedText, len)) != NULL)
memmove(wnd->DeletedText, bbl, len);
}
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);
}
}
static void StickEnd(WINDOW wnd)
{
char *cp = TextLine(wnd, wnd->CurrLine);
char *cp1 = strchr(cp, '\n');
int len = 0;
if (cp1 != NULL)
len = (int) (cp1 - cp);
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);
}
}
static void Downward(WINDOW wnd)
{
if (isMultiLine(wnd) && wnd->WndRow+wnd->wtop+1 < wnd->wlines) {
DownLine(wnd);
if (wnd->WndRow == ClientHeight(wnd)-1)
SendMessage(wnd, SCROLL, TRUE, 0);
wnd->WndRow++;
StickEnd(wnd);
}
}
static void DownLine(WINDOW wnd)
{
wnd->CurrLine++;
}
static void UpLine(WINDOW wnd)
{
if (wnd->CurrLine > 0)
--wnd->CurrLine;
}
static void Upward(WINDOW wnd)
{
if (isMultiLine(wnd) && wnd->CurrLine != 0) {
UpLine(wnd);
if (wnd->WndRow == 0)
SendMessage(wnd, SCROLL, FALSE, 0);
--wnd->WndRow;
StickEnd(wnd);
}
}
static void Backward(WINDOW wnd)
{
if (wnd->CurrCol) {
if (wnd->CurrCol-- <= wnd->wleft)
if (wnd->wleft != 0)
SendMessage(wnd, HORIZSCROLL, FALSE, 0);
}
else if (isMultiLine(wnd) && wnd->CurrLine != 0) {
Upward(wnd);
End(wnd);
}
}
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);
}
}
static void Home(WINDOW wnd)
{
wnd->CurrCol = 0;
if (wnd->wleft != 0) {
wnd->wleft = 0;
SendMessage(wnd, PAINT, 0, 0);
}
}
#define isWhite(c) ((c) == ' ' || (c) == '\n')
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);
}
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 (!isWhite(*CurrChar)) {
if (wnd->CurrLine == 0 && wnd->CurrCol == 0)
break;
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);
}
static void ResetEditBox(WINDOW wnd)
{
*wnd->text = '\0';
wnd->wlines = 0;
wnd->CurrLine = 0;
wnd->CurrCol = 0;
wnd->WndRow = 0;
wnd->TextChanged = FALSE;
wnd->wleft = 0;
wnd->textwidth = 0;
}
static void AddTextPointers(WINDOW wnd, int lineno, int ct)
{
while (lineno < wnd->wlines)
*((wnd->TextPointers) + lineno++) += ct;
}