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Power-Programmierung
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drdobbs
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1992
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06
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dflt12
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search.c
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1992-03-26
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/* ---------------- search.c ------------- */
#include "dflat.h"
extern DBOX SearchTextDB;
extern DBOX ReplaceTextDB;
static int CheckCase = TRUE;
/* - case-insensitive, white-space-normalized char compare - */
static BOOL SearchCmp(int a, int b)
{
if (b == '\n')
b = ' ';
if (CheckCase)
return a != b;
return tolower(a) != tolower(b);
}
/* ----- replace a matching block of text ----- */
static void replacetext(WINDOW wnd, char *cp1, DBOX *db)
{
char *cr = GetEditBoxText(db, ID_REPLACEWITH);
char *cp = GetEditBoxText(db, ID_SEARCHFOR);
int oldlen = strlen(cp); /* length of text being replaced */
int newlen = strlen(cr); /* length of replacing text */
int dif;
if (oldlen < newlen) {
/* ---- new text expands text size ---- */
dif = newlen-oldlen;
if (wnd->textlen < strlen(wnd->text)+dif) {
/* ---- need to reallocate the text buffer ---- */
int offset = (int)(cp1-wnd->text);
wnd->textlen += dif;
wnd->text = DFrealloc(wnd->text, wnd->textlen+2);
cp1 = wnd->text + offset;
}
memmove(cp1+dif, cp1, strlen(cp1)+1);
}
else if (oldlen > newlen) {
/* ---- new text collapses text size ---- */
dif = oldlen-newlen;
memmove(cp1, cp1+dif, strlen(cp1)+1);
}
strncpy(cp1, cr, newlen);
}
/* ------- search for the occurrance of a string ------- */
static void SearchTextBox(WINDOW wnd, int Replacing, int incr)
{
char *s1 = NULL, *s2, *cp1;
DBOX *db = Replacing ? &ReplaceTextDB : &SearchTextDB;
char *cp = GetEditBoxText(db, ID_SEARCHFOR);
BOOL rpl = TRUE, FoundOne = FALSE;
while (rpl == TRUE && cp != NULL) {
rpl = Replacing ?
CheckBoxSetting(&ReplaceTextDB, ID_REPLACEALL) :
FALSE;
if (TextBlockMarked(wnd)) {
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
/* search for a match starting at cursor position */
cp1 = CurrChar;
if (incr)
cp1++; /* start past the last hit */
/* --- compare at each character position --- */
while (*cp1) {
s1 = cp;
s2 = cp1;
while (*s1 && *s1 != '\n') {
if (SearchCmp(*s1, *s2))
break;
s1++, s2++;
}
if (*s1 == '\0' || *s1 == '\n')
break;
cp1++;
}
if (s1 != NULL && (*s1 == 0 || *s1 == '\n')) {
/* ----- match at *cp1 ------- */
FoundOne = TRUE;
/* mark a block at beginning of matching text */
wnd->BlkEndLine = TextLineNumber(wnd, s2);
wnd->BlkBegLine = TextLineNumber(wnd, cp1);
if (wnd->BlkEndLine < wnd->BlkBegLine)
wnd->BlkEndLine = wnd->BlkBegLine;
wnd->BlkEndCol =
(int)(s2 - TextLine(wnd, wnd->BlkEndLine));
wnd->BlkBegCol =
(int)(cp1 - TextLine(wnd, wnd->BlkBegLine));
/* position the cursor at the matching text */
wnd->CurrCol = wnd->BlkBegCol;
wnd->CurrLine = wnd->BlkBegLine;
wnd->WndRow = wnd->CurrLine - wnd->wtop;
/* align the window scroll to matching text */
if (WndCol > ClientWidth(wnd)-1)
wnd->wleft = wnd->CurrCol;
if (wnd->WndRow > ClientHeight(wnd)-1) {
wnd->wtop = wnd->CurrLine;
wnd->WndRow = 0;
}
SendMessage(wnd, PAINT, 0, 0);
SendMessage(wnd, KEYBOARD_CURSOR,
WndCol, wnd->WndRow);
if (Replacing) {
if (rpl || YesNoBox("Replace the text?")) {
replacetext(wnd, cp1, db);
wnd->TextChanged = TRUE;
BuildTextPointers(wnd);
}
if (rpl) {
incr = TRUE;
continue;
}
ClearTextBlock(wnd);
SendMessage(wnd, PAINT, 0, 0);
}
return;
}
break;
}
if (!FoundOne)
MessageBox("Search/Replace Text", "No match found");
}
/* ------- search for the occurrance of a string,
replace it with a specified string ------- */
void ReplaceText(WINDOW wnd)
{
if (CheckCase)
SetCheckBox(&ReplaceTextDB, ID_MATCHCASE);
if (DialogBox(wnd, &ReplaceTextDB, TRUE, NULL)) {
CheckCase=CheckBoxSetting(&ReplaceTextDB,ID_MATCHCASE);
SearchTextBox(wnd, TRUE, FALSE);
}
}
/* ------- search for the first occurrance of a string ------ */
void SearchText(WINDOW wnd)
{
if (CheckCase)
SetCheckBox(&SearchTextDB, ID_MATCHCASE);
if (DialogBox(wnd, &SearchTextDB, TRUE, NULL)) {
CheckCase=CheckBoxSetting(&SearchTextDB,ID_MATCHCASE);
SearchTextBox(wnd, FALSE, FALSE);
}
}
/* ------- search for the next occurrance of a string ------- */
void SearchNext(WINDOW wnd)
{
SearchTextBox(wnd, FALSE, TRUE);
}