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-/*
- * Copyright (C) 2012-2017 Robin Haberkorn
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <string.h>
-
-#include <glib.h>
-#include <glib/gprintf.h>
-
-#include "sciteco.h"
-#include "string-utils.h"
-#include "expressions.h"
-#include "undo.h"
-#include "qregisters.h"
-#include "ring.h"
-#include "parser.h"
-#include "search.h"
-#include "error.h"
-
-namespace SciTECO {
-
-namespace States {
- StateSearch search;
- StateSearchAll searchall;
- StateSearchKill searchkill;
- StateSearchDelete searchdelete;
-
- StateReplace replace;
- StateReplace_insert replace_insert;
- StateReplace_ignore replace_ignore;
-
- StateReplaceDefault replacedefault;
- StateReplaceDefault_insert replacedefault_insert;
- StateReplaceDefault_ignore replacedefault_ignore;
-}
-
-/*
- * Command states
- */
-
-/*$ S search pattern
- * S[pattern]$ -- Search for pattern
- * [n]S[pattern]$
- * -S[pattern]$
- * from,toS[pattern]$
- * :S[pattern]$ -> Success|Failure
- * [n]:S[pattern]$ -> Success|Failure
- * -:S[pattern]$ -> Success|Failure
- * from,to:S[pattern]$ -> Success|Failure
- *
- * Search for <pattern> in the current buffer/Q-Register.
- * Search order and range depends on the arguments given.
- * By default without any arguments, S will search forward
- * from dot till file end.
- * The optional single argument specifies the occurrence
- * to search (1 is the first occurrence, 2 the second, etc.).
- * Negative values for <n> perform backward searches.
- * If missing, the sign prefix is implied for <n>.
- * Therefore \(lq-S\(rq will search for the first occurrence
- * of <pattern> before dot.
- *
- * If two arguments are specified on the command,
- * search will be bounded in the character range <from> up to
- * <to>, and only the first occurrence will be searched.
- * <from> might be larger than <to> in which case a backward
- * search is performed in the selected range.
- *
- * After performing the search, the search <pattern> is saved
- * in the global search Q-Register \(lq_\(rq.
- * A success/failure condition boolean is saved in that
- * register's integer part.
- * <pattern> may be omitted in which case the pattern of
- * the last search or search and replace command will be
- * implied by using the contents of register \(lq_\(rq
- * (this could of course also be manually set).
- *
- * After a successful search, the pointer is positioned after
- * the found text in the buffer.
- * An unsuccessful search will display an error message but
- * not actually yield an error.
- * The message displaying is suppressed when executed from loops
- * and register \(lq_\(rq is the implied argument for break-commands
- * so that a search-break idiom can be implemented as follows:
- * .EX
- * <Sfoo$; ...>
- * .EE
- * Alternatively, S may be colon-modified in which case it returns
- * a condition boolean that may be directly evaluated by a
- * conditional or break-command.
- *
- * In interactive mode, searching will be performed immediately
- * (\(lqsearch as you type\(rq) highlighting matched text
- * on the fly.
- * Changing the <pattern> results in the search being reperformed
- * from the beginning.
- */
-void
-StateSearch::initial(void)
-{
- tecoInt v1, v2;
-
- undo.push_var(parameters);
-
- parameters.dot = interface.ssm(SCI_GETCURRENTPOS);
-
- v2 = expressions.pop_num_calc();
- if (expressions.args()) {
- /* TODO: optional count argument? */
- v1 = expressions.pop_num_calc();
- if (v1 <= v2) {
- parameters.count = 1;
- parameters.from = (gint)v1;
- parameters.to = (gint)v2;
- } else {
- parameters.count = -1;
- parameters.from = (gint)v2;
- parameters.to = (gint)v1;
- }
-
- if (!Validate::pos(parameters.from) ||
- !Validate::pos(parameters.to))
- throw RangeError("S");
- } else {
- parameters.count = (gint)v2;
- if (v2 >= 0) {
- parameters.from = parameters.dot;
- parameters.to = interface.ssm(SCI_GETLENGTH);
- } else {
- parameters.from = 0;
- parameters.to = parameters.dot;
- }
- }
-
- parameters.from_buffer = QRegisters::current ? NULL : ring.current;
- parameters.to_buffer = NULL;
-}
-
-static inline const gchar *
-regexp_escape_chr(gchar chr)
-{
- static gchar escaped[] = {'\\', '\0', '\0'};
-
- escaped[1] = chr;
- return g_ascii_isalnum(chr) ? escaped + 1 : escaped;
-}
-
-/**
- * Convert a SciTECO pattern character class to a regular
- * expression character class.
- * It will throw an error for wrong class specs (like invalid
- * Q-Registers) but not incomplete ones.
- *
- * @param state Initial pattern converter state.
- * May be modified on return, e.g. when ^E has been
- * scanned without a valid class.
- * @param pattern The character class definition to convert.
- * This may point into a longer pattern.
- * The pointer is modified and always left after
- * the last character used, so it may point to the
- * terminating null byte after the call.
- * @param escape_default Whether to treat single characters
- * as classes or not.
- * @return A regular expression string or NULL for incomplete
- * class specifications. When a string is returned, the
- * state has always been reset to STATE_START.
- * Must be freed with g_free().
- */
-gchar *
-StateSearch::class2regexp(MatchState &state, const gchar *&pattern,
- bool escape_default)
-{
- while (*pattern) {
- QRegister *reg;
- gchar *temp, *temp2;
-
- switch (state) {
- case STATE_START:
- switch (*pattern) {
- case CTL_KEY('S'):
- pattern++;
- return g_strdup("[:^alnum:]");
- case CTL_KEY('E'):
- state = STATE_CTL_E;
- break;
- default:
- /*
- * Either a single character "class" or
- * not a valid class at all.
- */
- return escape_default ? g_strdup(regexp_escape_chr(*pattern++))
- : NULL;
- }
- break;
-
- case STATE_CTL_E:
- switch (String::toupper(*pattern)) {
- case 'A':
- pattern++;
- state = STATE_START;
- return g_strdup("[:alpha:]");
- /* same as <CTRL/S> */
- case 'B':
- pattern++;
- state = STATE_START;
- return g_strdup("[:^alnum:]");
- case 'C':
- pattern++;
- state = STATE_START;
- return g_strdup("[:alnum:].$");
- case 'D':
- pattern++;
- state = STATE_START;
- return g_strdup("[:digit:]");
- case 'G':
- state = STATE_ANYQ;
- break;
- case 'L':
- pattern++;
- state = STATE_START;
- return g_strdup("\r\n\v\f");
- case 'R':
- pattern++;
- state = STATE_START;
- return g_strdup("[:alnum:]");
- case 'V':
- pattern++;
- state = STATE_START;
- return g_strdup("[:lower:]");
- case 'W':
- pattern++;
- state = STATE_START;
- return g_strdup("[:upper:]");
- default:
- /*
- * Not a valid ^E class, but could still
- * be a higher-level ^E pattern.
- */
- return NULL;
- }
- break;
-
- case STATE_ANYQ:
- /* will throw an error for invalid specs */
- if (!qreg_machine.input(*pattern, reg))
- /* incomplete, but consume byte */
- break;
- qreg_machine.reset();
-
- temp = reg->get_string();
- temp2 = g_regex_escape_string(temp, -1);
- g_free(temp);
-
- pattern++;
- state = STATE_START;
- return temp2;
-
- default:
- /*
- * Not a class, but could still be any other
- * high-level pattern.
- */
- return NULL;
- }
-
- pattern++;
- }
-
- /*
- * End of string. May happen for empty strings but also
- * incomplete ^E or ^EG classes.
- */
- return NULL;
-}
-
-/**
- * Convert SciTECO pattern to regular expression.
- * It will throw an error for definitely wrong pattern constructs
- * but not for incomplete patterns (a necessity of search-as-you-type).
- *
- * @bug Incomplete patterns after a pattern has been closed (i.e. its
- * string argument) are currently not reported as errors.
- *
- * @param pattern The pattern to scan through.
- * Modifies the pointer to point after the last
- * successfully scanned character, so it can be
- * called recursively. It may also point to the
- * terminating null byte after the call.
- * @param single_expr Whether to scan a single pattern
- * expression or an arbitrary sequence.
- * @return The regular expression string or NULL.
- * Must be freed with g_free().
- */
-gchar *
-StateSearch::pattern2regexp(const gchar *&pattern,
- bool single_expr)
-{
- MatchState state = STATE_START;
- gchar *re = NULL;
-
- do {
- gchar *temp;
-
- /*
- * First check whether it is a class.
- * This will not treat individual characters
- * as classes, so we do not convert them to regexp
- * classes unnecessarily.
- * NOTE: This might throw an error.
- */
- try {
- temp = class2regexp(state, pattern);
- } catch (...) {
- g_free(re);
- throw;
- }
- if (temp) {
- g_assert(state == STATE_START);
-
- String::append(re, "[");
- String::append(re, temp);
- String::append(re, "]");
- g_free(temp);
-
- /* class2regexp() already consumed all the bytes */
- continue;
- }
-
- if (!*pattern)
- /* end of pattern */
- break;
-
- switch (state) {
- case STATE_START:
- switch (*pattern) {
- case CTL_KEY('X'): String::append(re, "."); break;
- case CTL_KEY('N'): state = STATE_NOT; break;
- default:
- String::append(re, regexp_escape_chr(*pattern));
- }
- break;
-
- case STATE_NOT:
- state = STATE_START;
- try {
- temp = class2regexp(state, pattern, true);
- } catch (...) {
- g_free(re);
- throw;
- }
- if (!temp)
- /* a complete class is strictly required */
- goto incomplete;
- g_assert(state == STATE_START);
-
- String::append(re, "[^");
- String::append(re, temp);
- String::append(re, "]");
- g_free(temp);
-
- /* class2regexp() already consumed all the bytes */
- continue;
-
- case STATE_CTL_E:
- state = STATE_START;
- switch (String::toupper(*pattern)) {
- case 'M': state = STATE_MANY; break;
- case 'S': String::append(re, "\\s+"); break;
- /* same as <CTRL/X> */
- case 'X': String::append(re, "."); break;
- /* TODO: ASCII octal code!? */
- case '[':
- String::append(re, "(");
- state = STATE_ALT;
- break;
- default:
- g_free(re);
- throw SyntaxError(*pattern);
- }
- break;
-
- case STATE_MANY:
- /* consume exactly one pattern element */
- try {
- temp = pattern2regexp(pattern, true);
- } catch (...) {
- g_free(re);
- throw;
- }
- if (!temp)
- /* a complete expression is strictly required */
- goto incomplete;
-
- String::append(re, "(");
- String::append(re, temp);
- String::append(re, ")+");
- g_free(temp);
- state = STATE_START;
-
- /* pattern2regexp() already consumed all the bytes */
- continue;
-
- case STATE_ALT:
- switch (*pattern) {
- case ',':
- String::append(re, "|");
- break;
- case ']':
- String::append(re, ")");
- state = STATE_START;
- break;
- default:
- try {
- temp = pattern2regexp(pattern, true);
- } catch (...) {
- g_free(re);
- throw;
- }
- if (!temp)
- /* a complete expression is strictly required */
- goto incomplete;
-
- String::append(re, temp);
- g_free(temp);
-
- /* pattern2regexp() already consumed all the bytes */
- continue;
- }
- break;
-
- default:
- /* shouldn't happen */
- g_assert_not_reached();
- }
-
- pattern++;
- } while (!single_expr || state != STATE_START);
-
- /*
- * Complete open alternative.
- * This could be handled like an incomplete expression,
- * but closing it automatically improved search-as-you-type.
- */
- if (state == STATE_ALT)
- String::append(re, ")");
-
- return re;
-
-incomplete:
- g_free(re);
- return NULL;
-}
-
-void
-StateSearch::do_search(GRegex *re, gint from, gint to, gint &count)
-{
- GMatchInfo *info;
- const gchar *buffer;
-
- gint matched_from = -1, matched_to = -1;
-
- buffer = (const gchar *)interface.ssm(SCI_GETCHARACTERPOINTER);
- g_regex_match_full(re, buffer, (gssize)to, from,
- (GRegexMatchFlags)0, &info, NULL);
-
- if (count >= 0) {
- while (g_match_info_matches(info) && --count)
- g_match_info_next(info, NULL);
-
- if (!count)
- /* successful */
- g_match_info_fetch_pos(info, 0,
- &matched_from, &matched_to);
- } else {
- /* only keep the last `count' matches, in a circular stack */
- struct Range {
- gint from, to;
- };
- Range *matched = new Range[-count];
- gint matched_total = 0, i = 0;
-
- while (g_match_info_matches(info)) {
- g_match_info_fetch_pos(info, 0,
- &matched[i].from,
- &matched[i].to);
-
- g_match_info_next(info, NULL);
- i = ++matched_total % -count;
- }
-
- count = MIN(count + matched_total, 0);
- if (!count) {
- /* successful, i points to stack bottom */
- matched_from = matched[i].from;
- matched_to = matched[i].to;
- }
-
- delete[] matched;
- }
-
- g_match_info_free(info);
-
- if (matched_from >= 0 && matched_to >= 0)
- /* match success */
- interface.ssm(SCI_SETSEL, matched_from, matched_to);
-}
-
-void
-StateSearch::process(const gchar *str, gint new_chars)
-{
- static const gint flags = G_REGEX_CASELESS | G_REGEX_MULTILINE |
- G_REGEX_DOTALL | G_REGEX_RAW;
-
- QRegister *search_reg = QRegisters::globals["_"];
-
- gchar *re_pattern;
- GRegex *re;
-
- gint count = parameters.count;
-
- if (current_doc_must_undo())
- interface.undo_ssm(SCI_SETSEL,
- interface.ssm(SCI_GETANCHOR),
- interface.ssm(SCI_GETCURRENTPOS));
-
- search_reg->undo_set_integer();
- search_reg->set_integer(FAILURE);
-
- /*
- * NOTE: pattern2regexp() modifies str pointer and may throw
- */
- re_pattern = pattern2regexp(str);
- qreg_machine.reset();
-#ifdef DEBUG
- g_printf("REGEXP: %s\n", re_pattern);
-#endif
- if (!re_pattern)
- goto failure;
- re = g_regex_new(re_pattern, (GRegexCompileFlags)flags,
- (GRegexMatchFlags)0, NULL);
- g_free(re_pattern);
- if (!re)
- goto failure;
-
- if (!QRegisters::current &&
- ring.current != parameters.from_buffer) {
- ring.undo_edit();
- parameters.from_buffer->edit();
- }
-
- do_search(re, parameters.from, parameters.to, count);
-
- if (parameters.to_buffer && count) {
- Buffer *buffer = parameters.from_buffer;
-
- if (ring.current == buffer)
- ring.undo_edit();
-
- if (count > 0) {
- do {
- buffer = buffer->next() ? : ring.first();
- buffer->edit();
-
- if (buffer == parameters.to_buffer) {
- do_search(re, 0, parameters.dot, count);
- break;
- }
-
- do_search(re, 0, interface.ssm(SCI_GETLENGTH),
- count);
- } while (count);
- } else /* count < 0 */ {
- do {
- buffer = buffer->prev() ? : ring.last();
- buffer->edit();
-
- if (buffer == parameters.to_buffer) {
- do_search(re, parameters.dot,
- interface.ssm(SCI_GETLENGTH),
- count);
- break;
- }
-
- do_search(re, 0, interface.ssm(SCI_GETLENGTH),
- count);
- } while (count);
- }
-
- ring.current = buffer;
- }
-
- search_reg->set_integer(TECO_BOOL(!count));
-
- g_regex_unref(re);
-
- if (!count)
- return;
-
-failure:
- interface.ssm(SCI_GOTOPOS, parameters.dot);
-}
-
-State *
-StateSearch::done(const gchar *str)
-{
- BEGIN_EXEC(&States::start);
-
- QRegister *search_reg = QRegisters::globals["_"];
-
- if (*str) {
- /* workaround: preserve selection (also on rubout) */
- gint anchor = interface.ssm(SCI_GETANCHOR);
- if (current_doc_must_undo())
- interface.undo_ssm(SCI_SETANCHOR, anchor);
-
- search_reg->undo_set_string();
- search_reg->set_string(str);
-
- interface.ssm(SCI_SETANCHOR, anchor);
- } else {
- gchar *search_str = search_reg->get_string();
- process(search_str, 0 /* unused */);
- g_free(search_str);
- }
-
- if (eval_colon())
- expressions.push(search_reg->get_integer());
- else if (IS_FAILURE(search_reg->get_integer()) &&
- !loop_stack.items() /* not in loop */)
- interface.msg(InterfaceCurrent::MSG_ERROR, "Search string not found!");
-
- return &States::start;
-}
-
-/*$ N
- * [n]N[pattern]$ -- Search over buffer-boundaries
- * -N[pattern]$
- * from,toN[pattern]$
- * [n]:N[pattern]$ -> Success|Failure
- * -:N[pattern]$ -> Success|Failure
- * from,to:N[pattern]$ -> Success|Failure
- *
- * Search for <pattern> over buffer boundaries.
- * This command is similar to the regular search command
- * (S) but will continue to search for occurrences of
- * pattern when the end or beginning of the current buffer
- * is reached.
- * Occurrences of <pattern> spanning over buffer boundaries
- * will not be found.
- * When searching forward N will start in the current buffer
- * at dot, continue with the next buffer in the ring searching
- * the entire buffer until it reaches the end of the buffer
- * ring, continue with the first buffer in the ring until
- * reaching the current file again where it searched from the
- * beginning of the buffer up to its current dot.
- * Searching backwards does the reverse.
- *
- * N also differs from S in the interpretation of two arguments.
- * Using two arguments the search will be bounded between the
- * buffer with number <from>, up to the buffer with number
- * <to>.
- * When specifying buffer ranges, the entire buffers are searched
- * from beginning to end.
- * <from> may be greater than <to> in which case, searching starts
- * at the end of buffer <from> and continues backwards until the
- * beginning of buffer <to> has been reached.
- * Furthermore as with all buffer numbers, the buffer ring
- * is considered a circular structure and it is possible
- * to search over buffer ring boundaries by specifying
- * buffer numbers greater than the number of buffers in the
- * ring.
- */
-void
-StateSearchAll::initial(void)
-{
- tecoInt v1, v2;
-
- undo.push_var(parameters);
-
- parameters.dot = interface.ssm(SCI_GETCURRENTPOS);
-
- v2 = expressions.pop_num_calc();
- if (expressions.args()) {
- /* TODO: optional count argument? */
- v1 = expressions.pop_num_calc();
- if (v1 <= v2) {
- parameters.count = 1;
- parameters.from_buffer = ring.find(v1);
- parameters.to_buffer = ring.find(v2);
- } else {
- parameters.count = -1;
- parameters.from_buffer = ring.find(v2);
- parameters.to_buffer = ring.find(v1);
- }
-
- if (!parameters.from_buffer || !parameters.to_buffer)
- throw RangeError("N");
- } else {
- parameters.count = (gint)v2;
- /* NOTE: on Q-Registers, behave like "S" */
- if (QRegisters::current)
- parameters.from_buffer = parameters.to_buffer = NULL;
- else
- parameters.from_buffer = parameters.to_buffer = ring.current;
- }
-
- if (parameters.count >= 0) {
- parameters.from = parameters.dot;
- parameters.to = interface.ssm(SCI_GETLENGTH);
- } else {
- parameters.from = 0;
- parameters.to = parameters.dot;
- }
-}
-
-State *
-StateSearchAll::done(const gchar *str)
-{
- BEGIN_EXEC(&States::start);
-
- StateSearch::done(str);
- QRegisters::hook(QRegisters::HOOK_EDIT);
-
- return &States::start;
-}
-
-/*$ FK
- * FK[pattern]$ -- Delete up to occurrence of pattern
- * [n]FK[pattern]$
- * -FK[pattern]$
- * from,toFK[pattern]$
- * :FK[pattern]$ -> Success|Failure
- * [n]:FK[pattern]$ -> Success|Failure
- * -:FK[pattern]$ -> Success|Failure
- * from,to:FK[pattern]$ -> Success|Failure
- *
- * FK searches for <pattern> just like the regular search
- * command (S) but when found deletes all text from dot
- * up to but not including the found text instance.
- * When searching backwards the characters beginning after
- * the occurrence of <pattern> up to dot are deleted.
- *
- * In interactive mode, deletion is not performed
- * as-you-type but only on command termination.
- */
-State *
-StateSearchKill::done(const gchar *str)
-{
- gint dot;
-
- BEGIN_EXEC(&States::start);
-
- QRegister *search_reg = QRegisters::globals["_"];
-
- StateSearch::done(str);
-
- if (IS_FAILURE(search_reg->get_integer()))
- return &States::start;
-
- dot = interface.ssm(SCI_GETCURRENTPOS);
-
- interface.ssm(SCI_BEGINUNDOACTION);
- if (parameters.dot < dot) {
- /* kill forwards */
- gint anchor = interface.ssm(SCI_GETANCHOR);
-
- if (current_doc_must_undo())
- interface.undo_ssm(SCI_GOTOPOS, dot);
- interface.ssm(SCI_GOTOPOS, anchor);
-
- interface.ssm(SCI_DELETERANGE,
- parameters.dot, anchor - parameters.dot);
- } else {
- /* kill backwards */
- interface.ssm(SCI_DELETERANGE, dot, parameters.dot - dot);
- }
- interface.ssm(SCI_ENDUNDOACTION);
- ring.dirtify();
-
- if (current_doc_must_undo())
- interface.undo_ssm(SCI_UNDO);
-
- return &States::start;
-}
-
-/*$ FD
- * FD[pattern]$ -- Delete occurrence of pattern
- * [n]FD[pattern]$
- * -FD[pattern]$
- * from,toFD[pattern]$
- * :FD[pattern]$ -> Success|Failure
- * [n]:FD[pattern]$ -> Success|Failure
- * -:FD[pattern]$ -> Success|Failure
- * from,to:FD[pattern]$ -> Success|Failure
- *
- * Searches for <pattern> just like the regular search command
- * (S) but when found deletes the entire occurrence.
- */
-State *
-StateSearchDelete::done(const gchar *str)
-{
- BEGIN_EXEC(&States::start);
-
- QRegister *search_reg = QRegisters::globals["_"];
-
- StateSearch::done(str);
-
- if (IS_SUCCESS(search_reg->get_integer())) {
- interface.ssm(SCI_BEGINUNDOACTION);
- interface.ssm(SCI_REPLACESEL, 0, (sptr_t)"");
- interface.ssm(SCI_ENDUNDOACTION);
- ring.dirtify();
-
- if (current_doc_must_undo())
- interface.undo_ssm(SCI_UNDO);
- }
-
- return &States::start;
-}
-
-/*$ FS
- * FS[pattern]$[string]$ -- Search and replace
- * [n]FS[pattern]$[string]$
- * -FS[pattern]$[string]$
- * from,toFS[pattern]$[string]$
- * :FS[pattern]$[string]$ -> Success|Failure
- * [n]:FS[pattern]$[string]$ -> Success|Failure
- * -:FS[pattern]$[string]$ -> Success|Failure
- * from,to:FS[pattern]$[string]$ -> Success|Failure
- *
- * Search for <pattern> just like the regular search command
- * (S) does but replace it with <string> if found.
- * If <string> is empty, the occurrence will always be
- * deleted so \(lqFS[pattern]$$\(rq is similar to
- * \(lqFD[pattern]$\(rq.
- * The global replace register is \fBnot\fP touched
- * by the FS command.
- *
- * In interactive mode, the replacement will be performed
- * immediately and interactively.
- */
-State *
-StateReplace::done(const gchar *str)
-{
- BEGIN_EXEC(&States::replace_ignore);
-
- QRegister *search_reg = QRegisters::globals["_"];
-
- StateSearchDelete::done(str);
-
- return IS_SUCCESS(search_reg->get_integer())
- ? (State *)&States::replace_insert
- : (State *)&States::replace_ignore;
-}
-
-State *
-StateReplace_ignore::done(const gchar *str)
-{
- return &States::start;
-}
-
-/*$ FR
- * FR[pattern]$[string]$ -- Search and replace with default
- * [n]FR[pattern]$[string]$
- * -FR[pattern]$[string]$
- * from,toFR[pattern]$[string]$
- * :FR[pattern]$[string]$ -> Success|Failure
- * [n]:FR[pattern]$[string]$ -> Success|Failure
- * -:FR[pattern]$[string]$ -> Success|Failure
- * from,to:FR[pattern]$[string]$ -> Success|Failure
- *
- * The FR command is similar to the FS command.
- * It searches for <pattern> just like the regular search
- * command (S) and replaces the occurrence with <string>
- * similar to what FS does.
- * It differs from FS in the fact that the replacement
- * string is saved in the global replacement register
- * \(lq-\(rq.
- * If <string> is empty the string in the global replacement
- * register is implied instead.
- */
-State *
-StateReplaceDefault::done(const gchar *str)
-{
- BEGIN_EXEC(&States::replacedefault_ignore);
-
- QRegister *search_reg = QRegisters::globals["_"];
-
- StateSearchDelete::done(str);
-
- return IS_SUCCESS(search_reg->get_integer())
- ? (State *)&States::replacedefault_insert
- : (State *)&States::replacedefault_ignore;
-}
-
-State *
-StateReplaceDefault_insert::done(const gchar *str)
-{
- BEGIN_EXEC(&States::start);
-
- QRegister *replace_reg = QRegisters::globals["-"];
-
- if (*str) {
- replace_reg->undo_set_string();
- replace_reg->set_string(str);
- } else {
- gchar *replace_str = replace_reg->get_string();
- StateInsert::process(replace_str, strlen(replace_str));
- g_free(replace_str);
- }
-
- return &States::start;
-}
-
-State *
-StateReplaceDefault_ignore::done(const gchar *str)
-{
- BEGIN_EXEC(&States::start);
-
- if (*str) {
- QRegister *replace_reg = QRegisters::globals["-"];
-
- replace_reg->undo_set_string();
- replace_reg->set_string(str);
- }
-
- return &States::start;
-}
-
-} /* namespace SciTECO */
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