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x11-xserver-utils/xedit/hook.c

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/*
* Copyright (c) 1999 by The XFree86 Project, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the XFree86 Project shall
* not be used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization from the
* XFree86 Project.
*
* Author: Paulo César Pereira de Andrade
*/
/* $XFree86: xc/programs/xedit/hook.c,v 1.9 2003/01/08 05:07:40 paulo Exp $ */
/*
* This file is intended to be used to add all the necessary hooks to xedit
* emulate certain features of emacs (and other text editors) that are better
* kept only in xedit, to avoid unnecessary code in the Text Widget.
*
* The code here is not finished, and will probably be changed frequently.
*/
#include "xedit.h"
#include "re.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
/*
* Types
*/
typedef struct _ReplaceList {
char *word;
char *replace;
struct _ReplaceList *next;
} ReplaceList;
typedef enum {
SubstituteDisabled,
SubstituteAsk,
SubstituteNo,
SubstituteYes
} SubstitutionState;
typedef struct _EditInfo {
/* Xedit regex data */
re_cod regex;
re_mat mats[10];
/* Last command entered */
char command[128];
/* String and flags used to compile regex */
char pattern[64];
int flags;
/* Substitution buffer */
char subst[64];
int soff, slen, sref;
/* For interactive substitution */
int callback;
Widget widget;
char *text_line;
SubstitutionState state;
XawTextPosition from, to, start, end, first, last;
/* Use if need to allocate a buffer to pass the entire line to reexec */
char *line;
long lsize;
/* Buffer to prepare replacement, if needs to expand backreferences */
char *buffer;
long bsize;
} EditInfo;
/*
* Prototypes
*/
static void ActionHook(Widget, XtPointer, String, XEvent*, String*, Cardinal*);
static void AutoReplaceHook(Widget, String, XEvent*);
static Bool StartAutoReplace(void);
static char *ReplacedWord(char*, char*);
static void AutoReplace(Widget, XEvent*);
static void AutoReplaceCallback(Widget, XtPointer, XtPointer);
static void SubstituteHook(Widget w, String action, XEvent *event);
static void SubstituteCallback(Widget, XtPointer, XtPointer);
/*
* Initialization
*/
#define STRTBLSZ 11
static ReplaceList *replace_list[STRTBLSZ];
static EditInfo einfo;
extern Widget scratch;
/*
* Implementation
*/
Bool
StartHooks(XtAppContext app)
{
static Bool first_time = True;
if (first_time) {
StartAutoReplace();
(void)XtAppAddActionHook(app, ActionHook, NULL);
first_time = False;
return (True);
}
return (False);
}
/*ARGSUSED*/
static void
ActionHook(Widget w, XtPointer client_data, String action, XEvent *event,
String *params, Cardinal *num_params)
{
AutoReplaceHook(w, action, event);
SubstituteHook(w, action, event);
}
/*** auto replace ***/
struct {
Widget widget;
String text;
Cardinal length;
XawTextPosition left, right;
Bool replace;
Bool enabled;
} auto_replace;
static void
AutoReplaceHook(Widget w, String action, XEvent *event)
{
static Bool multiply;
if (w != textwindow || !auto_replace.enabled)
return;
if (auto_replace.widget != textwindow) {
if (auto_replace.replace) {
auto_replace.replace = False;
XtRemoveCallback(auto_replace.widget, XtNpositionCallback,
AutoReplaceCallback, NULL);
}
}
else if (strcmp(action, "multiply") == 0) {
multiply = True;
return;
}
else if (strcmp(action, "numeric") == 0) {
if (multiply)
return;
}
else if (strcmp(action, "insert-char") && strcmp(action, "newline") &&
strcmp(action, "newline-and-indent")) {
return;
}
multiply = False;
AutoReplace(w, event);
}
static Bool
StartAutoReplace(void)
{
Bool esc;
int len, llen, rlen, count = 0;
char ch, *tmp, *left, *right, *replace = app_resources.auto_replace;
if (!replace || !*replace)
return (False);
left = XtMalloc(llen = 256);
right = XtMalloc(rlen = 256);
while (*replace) {
/* skip white spaces */
while (*replace && isspace(*replace))
++replace;
if (!*replace)
break;
/* read left */
tmp = replace;
while (*replace && !isspace(*replace))
++replace;
len = replace - tmp;
if (len >= llen)
left = XtRealloc(left, llen = len + 1);
strncpy(left, tmp, len);
left[len] = '\0';
/* skip white spaces */
while (*replace && isspace(*replace))
++replace;
/* read right */
len = 0;
esc = False;
while ((ch = *replace) != '\0') {
++replace;
if (len + 2 >= rlen)
right = XtRealloc(right, rlen += 256);
if (ch == '\\') {
if (esc)
right[len++] = '\\';
esc = !esc;
continue;
}
else if (ch == '\n' && !esc)
break;
else
right[len++] = ch;
esc = False;
}
right[len] = '\0';
(void)ReplacedWord(left, right);
++count;
}
XtFree(left);
XtFree(right);
return (auto_replace.enabled = count > 0);
}
static char *
ReplacedWord(char *word, char *replace)
{
ReplaceList *list;
int ii = 0;
char *pp = word;
while (*pp)
ii = (ii << 1) ^ *pp++;
if (ii < 0)
ii = -ii;
ii %= STRTBLSZ;
for (list = replace_list[ii]; list; list = list->next)
if (strcmp(list->word, word) == 0) {
if (replace) {
XtFree(list->replace);
list->replace = XtNewString(replace);
}
return (list->replace);
}
if (!replace)
return (NULL);
list = XtNew(ReplaceList);
list->word = XtNewString(word);
list->replace = XtNewString(replace);
list->next = replace_list[ii];
replace_list[ii] = list;
return (list->replace);
}
static void
AutoReplace(Widget w, XEvent *event)
{
static XComposeStatus compose = {NULL, 0};
KeySym keysym;
XawTextBlock block;
XawTextPosition left, right, pos;
Widget source;
int i, len, size;
char *str, buf[32], mb[sizeof(wchar_t)];
size = XLookupString((XKeyEvent*)event, mb, sizeof(mb), &keysym, &compose);
if (size != 1 || isalnum(*mb))
return;
source = XawTextGetSource(w);
right = XawTextGetInsertionPoint(w);
left = XawTextSourceScan(source, right, XawstWhiteSpace,
XawsdLeft, 1, False);
if (left < 0 || left == right)
return;
len = 0;
str = buf;
size = sizeof(buf);
pos = left;
while (pos < right) {
pos = XawTextSourceRead(source, pos, &block, right - pos);
for (i = 0; i < block.length; i++) {
if (block.format == FMT8BIT)
*mb = block.ptr[i];
else
wctomb(mb, ((wchar_t*)block.ptr)[i]);
str[len++] = *mb;
if (len + 2 >= size) {
if (str == buf)
str = XtMalloc(size += sizeof(buf));
else
str = XtRealloc(str, size += sizeof(buf));
}
}
}
str[len] = '\0';
if ((auto_replace.text = ReplacedWord(str, NULL)) != NULL) {
auto_replace.length = strlen(auto_replace.text);
auto_replace.left = left;
auto_replace.right = right;
auto_replace.replace = True;
XtAddCallback(auto_replace.widget = w, XtNpositionCallback,
AutoReplaceCallback, NULL);
}
if (str != buf)
XtFree(str);
}
/*ARGSUSED*/
static void
AutoReplaceCallback(Widget w, XtPointer client_data, XtPointer call_data)
{
int i, inc;
XawTextBlock block, text;
char buffer[1024], mb[sizeof(wchar_t)];
XawTextPosition left, right, pos;
if (!auto_replace.replace || w != auto_replace.widget)
return;
XtRemoveCallback(auto_replace.widget, XtNpositionCallback,
AutoReplaceCallback, NULL);
auto_replace.replace = False;
inc = XawTextGetInsertionPoint(w) - auto_replace.right;
if (auto_replace.length + inc > sizeof(buffer))
block.ptr = XtMalloc(auto_replace.length + inc);
else
block.ptr = buffer;
memcpy(block.ptr, auto_replace.text, auto_replace.length);
block.length = auto_replace.length;
pos = left = auto_replace.right;
right = left + inc;
while (pos < right) {
pos = XawTextSourceRead(XawTextGetSource(w), pos, &text, inc);
for (i = 0; i < text.length; i++) {
if (text.format == FMT8BIT)
*mb = text.ptr[i];
else
wctomb(mb, ((wchar_t*)text.ptr)[i]);
block.ptr[block.length++] = *mb;
}
}
block.firstPos = 0;
block.format = FMT8BIT;
if (XawTextReplace(w, auto_replace.left, auto_replace.right + inc,
&block) == XawEditDone)
XawTextSetInsertionPoint(w, auto_replace.left + block.length);
if (block.ptr != buffer)
XtFree(block.ptr);
}
/*ARGUSED*/
void
LineEditAction(Widget w, XEvent *event, String *params, Cardinal *num_params)
{
XawTextBlock block;
if (True) {
/* XXX FIXME */
fprintf(stderr, "LineEditAction: Not working in international mode.\n");
return;
}
block.firstPos = 0;
block.format = FMT8BIT;
block.ptr = einfo.command;
block.length = strlen(einfo.command);
XawTextReplace(filenamewindow, 0,
XawTextLastPosition(filenamewindow), &block);
XtSetKeyboardFocus(topwindow, filenamewindow);
line_edit = True;
}
#define LSCAN(from, count, include) \
XawTextSourceScan(source, from, XawstEOL, XawsdLeft, count, include)
#define RSCAN(from, count, include) \
XawTextSourceScan(source, from, XawstEOL, XawsdRight, count, include)
void
LineEdit(Widget w)
{
/* Global usage variables */
XawTextPosition from, to, first, last, position, length, redisplay;
int replace, compile, ecode, nth, flags, count, etype;
char *command, *line, buffer[128];
XawTextBlock block;
Widget source;
XawTextScanDirection direction;
xedit_flist_item *item;
/* Variables used while parsing command */
int state, action, offset, icase, confirm;
long lfrom, lto, lfinc, ltinc, number;
char *ptr, *pstart, *pend, *rstart, *rend, *tmp;
/* Variables used in the search/replace loop */
int len;
XawTextPosition adjust = 0;
command = GetString(filenamewindow);
length = strlen(command);
if (length >= sizeof(einfo.command)) {
Feep();
return;
}
item = FindTextSource(XawTextGetSource(w), NULL);
source = item->source;
position = XawTextGetInsertionPoint(w);
first = XawTextSourceScan(source, 0, XawstAll, XawsdLeft, 1, True);
last = XawTextSourceScan(source, 0, XawstAll, XawsdRight, 1, True);
compile = redisplay = nth = count = confirm = 0;
direction = XawsdRight;
flags = RE_STARTEND;
/* Error types */
#define T_NONE 0
#define T_OPTION 1
#define T_ICASE 2
#define T_COMMAND 3
#define T_REPLACE 4
#define T_SEARCH 5
#define T_BACKSLASH 6
#define T_DIRECTION 7
#define T_COMMA 8
#define T_OFFSET 9
#define T_INCREMENT 10
#define T_NUMBER 11
#define T_UNFINISHED 12
#define T_RANGE 13
#define T_BACKREF 14
#define T_EDIT 15
etype = T_NONE;
#define FAIL(code) { etype = code; goto fail; }
/* Value for the line value, anything else is the line number */
#define L_FIRST -1
#define L_CURRENT -2
#define L_LAST -3
lfrom = L_FIRST;
lto = L_LAST;
/* Parsing states */
#define E_FINC 0
#define E_FROM 1
#define E_COMMA 2
#define E_TINC 3
#define E_TO 4
#define E_COMMAND 5
#define E_REGEX 6
#define E_SUBST 7
#define E_OPTIONS 8
state = E_FROM; /* Beginning interpretation */
/* Known commands */
#define A_SEARCH 0
#define A_REPLACE 1
action = A_SEARCH;
/* Flag to replace all occurrences */
#define O_ALL -1
number = 1;
lfinc = ltinc = 0;
icase = offset = 0;
pstart = pend = rstart = rend = NULL;
if (einfo.state != SubstituteDisabled) {
if (einfo.widget != w || strcmp(einfo.command, command)) {
einfo.widget = w;
einfo.state = SubstituteAsk;
}
else {
XawTextPosition s_start, s_end;
XawTextGetSelectionPos(w, &s_start, &s_end);
if (s_start != einfo.start || s_end != einfo.end)
einfo.state = SubstituteAsk;
confirm = replace = 1;
from = einfo.from;
to = einfo.to;
first = einfo.first;
last = einfo.last;
goto confirm_label;
}
}
/* Remember last command */
strcpy(einfo.command, command);
/* Loop parsing command */
for (ptr = einfo.command; *ptr;) {
switch (*ptr++) {
case 'c':
if (state != E_OPTIONS &&
state != E_COMMAND &&
state != E_REGEX)
FAIL(T_OPTION)
confirm = 1;
break;
case 'g':
if (state != E_OPTIONS &&
state != E_COMMAND &&
state != E_REGEX)
FAIL(T_OPTION)
offset = O_ALL;
break;
case 'i':
if (state != E_OPTIONS &&
state != E_COMMAND &&
state != E_REGEX &&
state != E_FROM)
FAIL(T_ICASE)
icase = 1;
break;
case 's':
if (state == E_FROM)
lfrom = lto = L_CURRENT;
else if (state == E_COMMA) {
lto = L_CURRENT;
ltinc = lfinc;
}
else if (state == E_TO)
lto = L_LAST;
else if (state == E_FINC) {
ltinc = lfinc;
lto = L_CURRENT;
}
else if (state != E_COMMAND && state != E_TINC)
FAIL(T_COMMAND)
action = A_REPLACE;
state = E_REGEX;
break;
case '?':
if (action == A_REPLACE)
FAIL(T_REPLACE)
case '/':
if (state == E_TINC)
state = action == A_REPLACE ? E_REGEX : E_FROM;
else if (state == E_COMMA || state == E_FINC) {
lto = L_LAST;
state = E_FROM;
}
else if (state == E_TO) {
if (ltinc == 0)
lto = L_LAST;
state = E_FROM;
}
else if (state == E_COMMAND)
state = E_FROM;
else if (state != E_REGEX &&
state != E_SUBST &&
state != E_FROM)
FAIL(T_SEARCH)
if (state != E_SUBST)
direction = ptr[-1] == '/' ? XawsdRight : XawsdLeft;
for (tmp = ptr; *tmp; tmp++) {
if (*tmp == '\\') {
if (*++tmp == '\0')
FAIL(T_BACKSLASH)
}
else if (*tmp == ptr[-1])
break;
}
if (state == E_REGEX) {
if (*tmp != ptr[-1])
FAIL(T_DIRECTION)
pstart = ptr;
pend = ptr = tmp;
state = E_SUBST;
}
else if (state == E_FROM) {
pstart = ptr;
pend = ptr = tmp;
state = E_OPTIONS;
if (*ptr)
++ptr;
}
else { /* E_SUBST */
rstart = ptr;
rend = tmp;
state = E_OPTIONS;
ptr = tmp;
if (*ptr)
++ptr;
}
break;
case ',':
if (state == E_FROM)
lfrom = L_FIRST;
else if (state == E_FINC)
lfrom = L_CURRENT;
else if (state != E_COMMA)
FAIL(T_COMMA)
state = E_TO;
break;
case '%':
if (state == E_FROM) {
lfrom = L_FIRST;
lto = L_LAST;
state = E_COMMAND;
}
else
FAIL(T_OFFSET)
break;
case '$':
if (state != E_TO)
FAIL(T_OFFSET)
lto = L_LAST;
state = E_COMMAND;
break;
case '.':
if (state == E_FROM) {
lfrom = L_CURRENT;
state = E_COMMA;
}
else if (state == E_TO) {
lto = L_CURRENT;
state = E_COMMAND;
}
else
FAIL(T_OFFSET)
break;
case '+':
if (state == E_FROM) {
lfinc = 1;
lfrom = L_CURRENT;
state = E_FINC;
}
else if (state == E_TO) {
ltinc = 1;
lto = L_CURRENT;
state = E_TINC;
}
else
FAIL(T_INCREMENT)
break;
case '-': case '^':
if (state == E_FROM) {
lfinc = -1;
lfrom = L_CURRENT;
state = E_FINC;
}
else if (state == E_TO) {
ltinc = -1;
lto = L_CURRENT;
state = E_TINC;
}
else
FAIL(T_INCREMENT)
number = -1;
break;
case ';':
if (state != E_FROM)
FAIL(T_OFFSET)
lfrom = L_CURRENT;
lto = L_LAST;
state = E_COMMAND;
break;
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
number = number * (ptr[-1] - '0');
while (isdigit(*ptr))
number = number * 10 + (*ptr++ - '0');
if (state == E_FROM) {
lfrom = number;
state = E_COMMA;
}
else if (state == E_FINC) {
lfinc = number;
state = E_COMMA;
}
else if (state == E_TO) {
lto = number;
state = E_COMMAND;
}
else if (state == E_TINC) {
ltinc = number;
state = E_COMMAND;
}
else if (state == E_OPTIONS && action == A_REPLACE)
offset = number - 1;
else
FAIL(T_NUMBER)
number = 1;
break;
case '\0':
if (state == E_OPTIONS)
break;
default:
FAIL(T_UNFINISHED)
}
}
replace = action == A_REPLACE;
switch (lfrom) {
case L_FIRST:
from = first;
break;
case L_LAST:
from = LSCAN(last, 1, False);
break;
case L_CURRENT:
if (lfinc <= 0)
from = LSCAN(position, -lfinc + 1, False);
else {
from = RSCAN(position, lfinc + 1, False);
from = LSCAN(from, 1, False);
}
break;
default:
from = RSCAN(first, lfrom, False);
from = LSCAN(from, 1, False);
break;
}
/* Just requesting to go to the numbered line */
if (state == E_COMMA || state == E_FINC) {
XawTextSetInsertionPoint(w, from);
return;
}
length = pend - pstart;
if (pstart == NULL || (replace && rstart == NULL) ||
length >= sizeof(einfo.pattern) - 1)
FAIL(T_UNFINISHED)
/* Need to (re)compile regular expression pattern? */
if ((!!(einfo.flags & RE_ICASE) ^ icase) ||
strlen(einfo.pattern) < length ||
strncmp(pstart, einfo.pattern, length)) {
compile = 1;
memcpy(einfo.pattern, pstart, length);
einfo.pattern[length] = '\0';
einfo.flags = icase ? RE_ICASE : 0;
}
/* Check range of lines to operate on */
switch (lto) {
case L_FIRST:
to = RSCAN(first, 1, True);
break;
case L_LAST:
to = last;
break;
case L_CURRENT:
if (ltinc < 0) {
to = LSCAN(position, -ltinc + 1, True);
to = RSCAN(to, 2, True);
}
else
to = RSCAN(position, ltinc + 1, True);
break;
default:
to = RSCAN(first, lto, True);
break;
}
if (from >= to)
FAIL(T_RANGE)
/* Set first and last position allowed to search/replace */
first = from;
last = to;
/* Check bounds to work on */
if (replace) {
int i, csubst;
/* Check number of required match results and remove/parse backslashes */
memcpy(einfo.subst, rstart, einfo.slen = rend - rstart);
einfo.sref = 0;
einfo.soff = offset;
for (i = 0; i < einfo.slen - 1; i++) {
if (einfo.subst[i] == '\\') {
csubst = -1;
switch (einfo.subst[i + 1]) {
case '0': csubst = '\0'; break;
case 'a': csubst = '\b'; break;
case 'b': csubst = '\b'; break;
case 'f': csubst = '\f'; break;
case 'n': csubst = '\n'; break;
case 'r': csubst = '\r'; break;
case 't': csubst = '\t'; break;
case 'v': csubst = '\v'; break;
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
++i;
if (einfo.subst[i] - '0' > einfo.sref)
einfo.sref = einfo.subst[i] - '0';
break;
default:
csubst = einfo.subst[i + 1];
break;
}
if (csubst >= 0) {
memmove(einfo.subst + i, einfo.subst + i + 1,
einfo.slen - i);
einfo.subst[i] = csubst;
--einfo.slen;
++i;
csubst = -1;
}
}
}
}
else if (einfo.widget != w) {
/* Just a flag for backward search */
einfo.from = last;
einfo.widget = w;
}
/* Compile pattern if required */
if (compile) {
refree(&einfo.regex);
if ((ecode = recomp(&einfo.regex, einfo.pattern, einfo.flags)) != 0)
goto print;
}
if (!replace && position >= first && position <= last) {
from = position;
/* The backwards repetition currently is only backwards when
* changing lines, so remember from where started, to also
* search in the first line. */
if (LSCAN(from, 1, False) == from) {
if (direction == XawsdLeft)
einfo.from = from;
}
else
flags |= RE_NOTBOL;
}
to = RSCAN(from, 1, True);
if (confirm) {
if (!replace)
FAIL(T_UNFINISHED)
einfo.widget = w;
einfo.state = SubstituteAsk;
einfo.from = from;
einfo.to = to;
einfo.first = first;
einfo.last = last;
}
else
einfo.state = SubstituteDisabled;
confirm_label:
if (replace) {
redisplay = 1;
XawTextDisableRedisplay(w);
}
for (;;) {
if (confirm && einfo.state != SubstituteAsk) {
/* Restore state from previous call */
ecode = 0;
nth = einfo.soff;
/* einfo.mats should not have changed */
if (einfo.state == SubstituteYes) {
einfo.state = SubstituteAsk;
line = einfo.text_line;
goto substitute_label;
}
else {
++nth;
einfo.state = SubstituteAsk;
from = einfo.from = einfo.end;
goto no_substitute_label;
}
}
/* Read or use a line of text inplace */
position = from;
length = to - from;
XawTextSourceRead(source, position, &block, to - position);
if (block.length >= length)
line = block.ptr;
else {
if (length > einfo.lsize) {
einfo.line = XtRealloc(einfo.line, to - from);
einfo.lsize = to - from;
}
memcpy(einfo.line, block.ptr, block.length);
length = block.length;
for (position += length; position < to; position += length) {
XawTextSourceRead(source, position, &block, to - position);
memcpy(einfo.line + length, block.ptr, block.length);
length += block.length;
}
line = einfo.line;
}
/* Execute expression */
einfo.mats[0].rm_so = 0;
einfo.mats[0].rm_eo = to - from - !(from == to || to == last);
ecode = reexec(&einfo.regex, line,
einfo.sref + 1, &einfo.mats[0], flags);
if (replace && einfo.mats[0].rm_so == einfo.mats[0].rm_eo)
/* Ignore empty matches */
ecode = RE_NOMATCH;
if (ecode == 0 && confirm &&
(einfo.soff == O_ALL || nth == einfo.soff)) {
einfo.end = from + einfo.mats[0].rm_eo;
einfo.start = from + einfo.mats[0].rm_so;
XawTextSetInsertionPoint(w, einfo.end);
XawTextSetSelection(w, einfo.start, einfo.end);
einfo.state = SubstituteAsk;
einfo.from = from;
einfo.to = to;
einfo.first = first;
einfo.last = last;
einfo.text_line = line;
break;
}
substitute_label:
if (ecode == 0) {
from += einfo.mats[0].rm_so;
len = einfo.mats[0].rm_eo - einfo.mats[0].rm_so;
/* Found match */
if (replace) {
/* If not replacing all ocurrences, or if not
* at the correct offset */
if (einfo.soff != O_ALL && nth < einfo.soff) {
from += len;
++nth;
continue;
}
/* Do the substitution */
block.firstPos = 0;
block.format = FMT8BIT;
if (einfo.sref) {
/* Hard way */
int i, ref, xlen;
for (i = length = 0; i < einfo.slen; i++) {
if (length + 2 >= einfo.bsize) {
einfo.bsize = einfo.bsize + 1024;
einfo.buffer = XtRealloc(einfo.buffer, einfo.bsize);
}
if (einfo.subst[i] == '\\') {
++i;
if (einfo.subst[i] >= '1' && einfo.subst[i] <= '9') {
ref = einfo.subst[i] - '0';
xlen = einfo.mats[ref].rm_eo -
einfo.mats[ref].rm_so;
if (xlen < 0)
/* Oops, something went wrong... */
FAIL(T_BACKREF)
if (length + xlen >= einfo.bsize) {
einfo.bsize += xlen + 1024 - (xlen % 1024);
einfo.buffer = XtRealloc(einfo.buffer,
einfo.bsize);
}
memcpy(einfo.buffer + length,
line + einfo.mats[ref].rm_so, xlen);
length += xlen;
}
else {
einfo.buffer[length++] = einfo.subst[i - 1];
einfo.buffer[length++] = einfo.subst[i];
}
}
else
einfo.buffer[length++] = einfo.subst[i];
}
block.ptr = einfo.buffer;
block.length = length;
}
else {
block.ptr = einfo.subst;
block.length = length = einfo.slen;
}
adjust = length - len;
if (XawTextReplace(w, from, from + len, &block) != XawEditDone)
FAIL(T_EDIT)
last += adjust;
to += adjust;
from += length;
no_substitute_label:
if (einfo.soff != O_ALL) {
nth = 0;
to = RSCAN(from, 1, True);
from = LSCAN(to, 1, False);
if (to == last) {
XawTextSetInsertionPoint(w, from);
break;
}
}
else
flags |= RE_NOTBOL;
}
else {
XawTextSetInsertionPoint(w, from + len);
XawTextSetSelection(w, from, from + len);
break;
}
}
else if (ecode == RE_NOMATCH) {
nth = 0;
/* Try again in the next/previous line */
if (direction == XawsdLeft) {
from = LSCAN(to - 1, 1 + (from != to), False);
if (einfo.from <= first) {
Feep();
if (++count > 1) {
XawTextSetInsertionPoint(w, position);
XawTextUnsetSelection(w);
break;
}
from = LSCAN(last, 1, False);
}
to = RSCAN(from, 1, True);
/* Can use einfo.from because replace is only done forward */
einfo.from = from;
}
else {
if (to >= last) {
Feep();
if (replace || ++count > 1) {
XawTextSetInsertionPoint(w, position);
XawTextUnsetSelection(w);
einfo.state = SubstituteDisabled;
confirm = 0;
break;
}
to = first;
}
from = LSCAN(to + 1, 1, False);
to = RSCAN(from, 1, True);
}
/* Reset flags now */
flags = RE_STARTEND;
}
else
goto print;
}
if (redisplay)
XawTextEnableRedisplay(w);
/* If replacing not interatively return to the edit window after finished */
if (replace && !confirm) {
Arg args[1];
XtSetKeyboardFocus(topwindow, textwindow);
if (item->source != scratch)
XtSetArg(args[0], XtNstring, item->name);
else
XtSetArg(args[0], XtNstring, NULL);
XtSetValues(filenamewindow, args, 1);
}
return;
print:
if (redisplay)
XawTextEnableRedisplay(w);
strcpy(buffer, "Regex error: ");
length = 13;
reerror(ecode, &einfo.regex,
buffer + length, sizeof(buffer) - length - 2);
strcat(buffer, "\n");
XeditPrintf(buffer);
refree(&einfo.regex);
einfo.state = SubstituteDisabled;
Feep();
return;
fail:
if (etype != T_NONE) {
switch (etype) {
case T_OPTION:
ptr = "Option needs a command";
break;
case T_ICASE:
ptr = "Icase needs an command defined or none for search";
break;
case T_COMMAND:
ptr = "Command incorrectly specified";
break;
case T_REPLACE:
ptr = "Can only search backwards";
break;
case T_SEARCH:
ptr = "Badly placed search/replace specifier";
break;
case T_BACKSLASH:
ptr = "A single backslash cannot be the last command character";
break;
case T_DIRECTION:
ptr = "Regular expression must be separeted by / or ? not both";
break;
case T_COMMA:
ptr = "Badly placed comma";
break;
case T_OFFSET:
ptr = "Badly placed line offset specifier";
break;
case T_INCREMENT:
ptr = "Badly placed line offset increment specifier";
break;
case T_NUMBER:
ptr = "Numeric argument not expected";
break;
case T_UNFINISHED:
ptr = "Unfinished command";
break;
case T_RANGE:
ptr = "Bad line range";
break;
case T_BACKREF:
/* This may be an internal re error, but most likely the
* user asked for something like "s/re0(re1)re2/\2/" */
ptr = "Bad backreference";
break;
case T_EDIT:
ptr = "Failed to replace text";
break;
default:
ptr = "Unknown error";
break;
}
XmuSnprintf(buffer, sizeof(buffer), "Error: %s.\n", ptr);
XeditPrintf(buffer);
}
if (redisplay)
XawTextEnableRedisplay(w);
einfo.state = SubstituteDisabled;
Feep();
}
static void
SubstituteHook(Widget w, String action, XEvent *event)
{
if (w != filenamewindow)
return;
if (line_edit && einfo.state == SubstituteAsk) {
if (strcmp(action, "newline") == 0 ||
strcmp(action, "load-file") == 0)
einfo.state = SubstituteAsk;
else if (strcmp(action, "insert-char") == 0) {
static XComposeStatus compose = {NULL, 0};
KeySym keysym;
char mb[sizeof(wchar_t)];
if (XLookupString((XKeyEvent*)event, mb, sizeof(mb),
&keysym, &compose) == 1) {
if (*mb == 'y' || *mb == 'Y')
einfo.state = SubstituteYes;
else if (*mb == 'n' || *mb == 'N')
einfo.state = SubstituteNo;
else
einfo.state = SubstituteDisabled;
if (einfo.state != SubstituteDisabled) {
einfo.callback = 1;
XtAddCallback(filenamewindow, XtNpositionCallback,
SubstituteCallback, NULL);
}
}
}
else if (strcmp(action, "cancel-find-file") == 0)
einfo.state = SubstituteDisabled;
}
if (einfo.state == SubstituteDisabled && einfo.callback) {
einfo.callback = 0;
XtRemoveCallback(filenamewindow, XtNpositionCallback,
SubstituteCallback, NULL);
}
}
/*ARGSUSED*/
static void
SubstituteCallback(Widget w, XtPointer client_data, XtPointer call_data)
{
XawTextBlock block;
einfo.callback = 0;
XtRemoveCallback(filenamewindow, XtNpositionCallback,
SubstituteCallback, NULL);
block.firstPos = 0;
block.format = FMT8BIT;
block.ptr = einfo.command;
block.length = strlen(einfo.command);
XawTextReplace(filenamewindow, 0,
XawTextLastPosition(filenamewindow), &block);
LineEdit(einfo.widget);
}
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