/* $Id$ */ /************************************************************************** * nano.c * * * * Copyright (C) 1999-2004 Chris Allegretta * * 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 2, 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, write to the Free Software * * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * **************************************************************************/ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "proto.h" #include "nano.h" #ifdef HAVE_TERMIOS_H #include #endif #ifdef HAVE_TERMIO_H #include #endif #ifdef HAVE_GETOPT_H #include #endif #ifndef NANO_SMALL #include #endif #ifndef DISABLE_WRAPJUSTIFY static int fill = 0; /* Fill - where to wrap lines, basically */ #endif #ifndef DISABLE_WRAPPING static int same_line_wrap = 0; /* Whether wrapped text should be prepended to the next line */ #endif static struct termios oldterm; /* The user's original term settings */ static struct sigaction act; /* For all our fun signal handlers */ #ifndef NANO_SMALL static sigjmp_buf jmpbuf; /* Used to return to mainloop after SIGWINCH */ #endif /* What we do when we're all set to exit */ RETSIGTYPE finish(int sigage) { if (!ISSET(NO_HELP)) blank_bottombars(); else blank_statusbar(); wrefresh(bottomwin); endwin(); /* Restore the old terminal settings. */ tcsetattr(0, TCSANOW, &oldterm); #if !defined(NANO_SMALL) && defined(ENABLE_NANORC) if (!ISSET(NO_RCFILE) && ISSET(HISTORYLOG)) save_history(); #endif #ifdef DEBUG thanks_for_all_the_fish(); #endif exit(sigage); } /* Die (gracefully?) */ void die(const char *msg, ...) { va_list ap; endwin(); curses_ended = TRUE; /* Restore the old terminal settings. */ tcsetattr(0, TCSANOW, &oldterm); va_start(ap, msg); vfprintf(stderr, msg, ap); va_end(ap); /* save the currently loaded file if it's been modified */ if (ISSET(MODIFIED)) die_save_file(filename); #ifdef ENABLE_MULTIBUFFER /* then save all of the other modified loaded files, if any */ if (open_files != NULL) { openfilestruct *tmp; tmp = open_files; while (open_files->prev != NULL) open_files = open_files->prev; while (open_files->next != NULL) { /* if we already saved the file above (i.e, if it was the currently loaded file), don't save it again */ if (tmp != open_files) { /* make sure open_files->fileage and fileage, and open_files->filebot and filebot, are in sync; they might not be if lines have been cut from the top or bottom of the file */ fileage = open_files->fileage; filebot = open_files->filebot; /* save the file if it's been modified */ if (open_files->file_flags & MODIFIED) die_save_file(open_files->filename); } open_files = open_files->next; } } #endif exit(1); /* We have a problem: exit w/ errorlevel(1) */ } void die_save_file(const char *die_filename) { char *ret; int i = -1; /* No emergency files in restricted mode! */ if (ISSET(RESTRICTED)) return; /* If we can't save, we have REAL bad problems, but we might as well TRY. */ if (die_filename[0] == '\0') ret = get_next_filename("nano.save"); else { char *buf = charalloc(strlen(die_filename) + 6); strcpy(buf, die_filename); strcat(buf, ".save"); ret = get_next_filename(buf); free(buf); } if (ret[0] != '\0') i = write_file(ret, 1, 0, 0); if (i != -1) fprintf(stderr, _("\nBuffer written to %s\n"), ret); else fprintf(stderr, _("\nNo %s written (too many backup files?)\n"), ret); free(ret); } /* Die with an error message that the screen was too small if, well, the * screen is too small. */ void die_too_small(void) { die(_("Window size is too small for nano...\n")); } void print_view_warning(void) { statusbar(_("Key illegal in VIEW mode")); } /* Initialize global variables -- no better way for now. If * save_cutbuffer is nonzero, don't set cutbuffer to NULL. */ void global_init(int save_cutbuffer) { current_x = 0; current_y = 0; editwinrows = LINES - 5 + no_help(); if (editwinrows < MIN_EDITOR_ROWS || COLS < MIN_EDITOR_COLS) die_too_small(); fileage = NULL; if (!save_cutbuffer) cutbuffer = NULL; current = NULL; edittop = NULL; totlines = 0; totsize = 0; placewewant = 0; #ifndef DISABLE_WRAPJUSTIFY fill = wrap_at; if (fill <= 0) fill += COLS; if (fill < 0) fill = 0; #endif hblank = charalloc(COLS + 1); memset(hblank, ' ', COLS); hblank[COLS] = '\0'; } void window_init(void) { editwinrows = LINES - 5 + no_help(); if (editwinrows < MIN_EDITOR_ROWS) die_too_small(); if (topwin != NULL) delwin(topwin); if (edit != NULL) delwin(edit); if (bottomwin != NULL) delwin(bottomwin); /* Set up the windows. */ topwin = newwin(2, COLS, 0, 0); edit = newwin(editwinrows, COLS, 2, 0); bottomwin = newwin(3 - no_help(), COLS, LINES - 3 + no_help(), 0); /* Turn the keypad back on. */ keypad(edit, TRUE); keypad(bottomwin, TRUE); } #ifndef DISABLE_MOUSE void mouse_init(void) { if (ISSET(USE_MOUSE)) { mousemask(BUTTON1_RELEASED, NULL); mouseinterval(50); } else mousemask(0, NULL); } #endif #ifndef DISABLE_HELP /* This function allocates help_text, and stores the help string in it. * help_text should be NULL initially. */ void help_init(void) { size_t allocsize = 1; /* space needed for help_text */ char *ptr = NULL; const shortcut *s; #ifndef NANO_SMALL const toggle *t; #endif /* First set up the initial help text for the current function */ if (currshortcut == whereis_list || currshortcut == replace_list || currshortcut == replace_list_2) ptr = _("Search Command Help Text\n\n " "Enter the words or characters you would like to search " "for, then hit enter. If there is a match for the text you " "entered, the screen will be updated to the location of the " "nearest match for the search string.\n\n " "The previous search string will be shown in brackets after " "the Search: prompt. Hitting Enter without entering any text " "will perform the previous search.\n\n The following function " "keys are available in Search mode:\n\n"); else if (currshortcut == goto_list) ptr = _("Go To Line Help Text\n\n " "Enter the line number that you wish to go to and hit " "Enter. If there are fewer lines of text than the " "number you entered, you will be brought to the last line " "of the file.\n\n The following function keys are " "available in Go To Line mode:\n\n"); else if (currshortcut == insertfile_list) ptr = _("Insert File Help Text\n\n " "Type in the name of a file to be inserted into the current " "file buffer at the current cursor location.\n\n " "If you have compiled nano with multiple file buffer " "support, and enable multiple buffers with the -F " "or --multibuffer command line flags, the Meta-F toggle, or " "a nanorc file, inserting a file will cause it to be " "loaded into a separate buffer (use Meta-< and > to switch " "between file buffers).\n\n If you need another blank " "buffer, do not enter any filename, or type in a " "nonexistent filename at the prompt and press " "Enter.\n\n The following function keys are " "available in Insert File mode:\n\n"); else if (currshortcut == writefile_list) ptr = _("Write File Help Text\n\n " "Type the name that you wish to save the current file " "as and hit Enter to save the file.\n\n If you have " "selected text with Ctrl-^, you will be prompted to " "save only the selected portion to a separate file. To " "reduce the chance of overwriting the current file with " "just a portion of it, the current filename is not the " "default in this mode.\n\n The following function keys " "are available in Write File mode:\n\n"); #ifndef DISABLE_BROWSER else if (currshortcut == browser_list) ptr = _("File Browser Help Text\n\n " "The file browser is used to visually browse the " "directory structure to select a file for reading " "or writing. You may use the arrow keys or Page Up/" "Down to browse through the files, and S or Enter to " "choose the selected file or enter the selected " "directory. To move up one level, select the directory " "called \"..\" at the top of the file list.\n\n The " "following function keys are available in the file " "browser:\n\n"); else if (currshortcut == gotodir_list) ptr = _("Browser Go To Directory Help Text\n\n " "Enter the name of the directory you would like to " "browse to.\n\n If tab completion has not been disabled, " "you can use the TAB key to (attempt to) automatically " "complete the directory name.\n\n The following function " "keys are available in Browser Go To Directory mode:\n\n"); #endif #ifndef DISABLE_SPELLER else if (currshortcut == spell_list) ptr = _("Spell Check Help Text\n\n " "The spell checker checks the spelling of all text " "in the current file. When an unknown word is " "encountered, it is highlighted and a replacement can " "be edited. It will then prompt to replace every " "instance of the given misspelled word in the " "current file.\n\n The following other functions are " "available in Spell Check mode:\n\n"); #endif #ifndef NANO_SMALL else if (currshortcut == extcmd_list) ptr = _("External Command Help Text\n\n " "This menu allows you to insert the output of a command " "run by the shell into the current buffer (or a new " "buffer in multibuffer mode).\n\n The following keys are " "available in this mode:\n\n"); #endif else /* Default to the main help list */ ptr = _(" nano help text\n\n " "The nano editor is designed to emulate the functionality and " "ease-of-use of the UW Pico text editor. There are four main " "sections of the editor: The top line shows the program " "version, the current filename being edited, and whether " "or not the file has been modified. Next is the main editor " "window showing the file being edited. The status line is " "the third line from the bottom and shows important messages. " "The bottom two lines show the most commonly used shortcuts " "in the editor.\n\n " "The notation for shortcuts is as follows: Control-key " "sequences are notated with a caret (^) symbol and can be " "entered either by using the Control (Ctrl) key or pressing the " "Esc key twice. Escape-key sequences are notated with the Meta " "(M) symbol and can be entered using either the Esc, Alt or " "Meta key depending on your keyboard setup. Also, pressing Esc " "twice and then typing a three-digit number from 000 to 255 " "will enter the character with the corresponding ASCII code. " "The following keystrokes are available in the main editor " "window. Alternative keys are shown in parentheses:\n\n"); allocsize += strlen(ptr); /* The space needed for the shortcut lists, at most COLS characters, * plus '\n'. */ allocsize += (COLS + 1) * length_of_list(currshortcut); #ifndef NANO_SMALL /* If we're on the main list, we also count the toggle help text. * Each line has "M-%c\t\t\t", which fills 24 columns, plus at most * COLS - 24 characters, plus '\n'.*/ if (currshortcut == main_list) { size_t endislen = strlen(_("enable/disable")); for (t = toggles; t != NULL; t = t->next) allocsize += 8 + strlen(t->desc) + endislen; } #endif /* !NANO_SMALL */ /* help_text has been freed and set to NULL unless the user resized * while in the help screen. */ free(help_text); /* Allocate space for the help text */ help_text = charalloc(allocsize); /* Now add the text we want */ strcpy(help_text, ptr); ptr = help_text + strlen(help_text); /* Now add our shortcut info */ for (s = currshortcut; s != NULL; s = s->next) { /* true if the character in s->metaval is shown in first column */ int meta_shortcut = 0; if (s->ctrlval != NANO_NO_KEY) { #ifndef NANO_SMALL if (s->ctrlval == NANO_HISTORY_KEY) ptr += sprintf(ptr, "%.2s", _("Up")); else #endif if (s->ctrlval == NANO_CONTROL_SPACE) ptr += sprintf(ptr, "^%.5s", _("Space")); else if (s->ctrlval == NANO_CONTROL_8) ptr += sprintf(ptr, "^?"); else ptr += sprintf(ptr, "^%c", s->ctrlval + 64); } #ifndef NANO_SMALL else if (s->metaval != NANO_NO_KEY) { meta_shortcut = 1; if (s->metaval == NANO_ALT_SPACE) ptr += snprintf(ptr, 8, "M-%.5s", _("Space")); else ptr += sprintf(ptr, "M-%c", toupper(s->metaval)); } #endif *(ptr++) = '\t'; if (s->funcval != NANO_NO_KEY) ptr += sprintf(ptr, "(F%d)", s->funcval - KEY_F0); *(ptr++) = '\t'; if (!meta_shortcut && s->metaval != NANO_NO_KEY) ptr += sprintf(ptr, "(M-%c)", toupper(s->metaval)); else if (meta_shortcut && s->miscval != NANO_NO_KEY) ptr += sprintf(ptr, "(M-%c)", toupper(s->miscval)); *(ptr++) = '\t'; assert(s->help != NULL); ptr += sprintf(ptr, "%.*s\n", COLS > 24 ? COLS - 24 : 0, s->help); } #ifndef NANO_SMALL /* And the toggles... */ if (currshortcut == main_list) { for (t = toggles; t != NULL; t = t->next) { assert(t->desc != NULL); ptr += sprintf(ptr, "M-%c\t\t\t%s %s\n", toupper(t->val), t->desc, _("enable/disable")); } } #endif /* !NANO_SMALL */ /* If all went well, we didn't overwrite the allocated space for help_text. */ assert(strlen(help_text) < allocsize); } #endif /* Create a new filestruct node. Note that we specifically do not set * prevnode->next equal to the new line. */ filestruct *make_new_node(filestruct *prevnode) { filestruct *newnode = (filestruct *)nmalloc(sizeof(filestruct)); newnode->data = NULL; newnode->prev = prevnode; newnode->next = NULL; newnode->lineno = prevnode != NULL ? prevnode->lineno + 1 : 1; return newnode; } /* Make a copy of a node to a pointer (space will be malloc()ed). */ filestruct *copy_node(const filestruct *src) { filestruct *dst = (filestruct *)nmalloc(sizeof(filestruct)); assert(src != NULL); dst->data = charalloc(strlen(src->data) + 1); dst->next = src->next; dst->prev = src->prev; strcpy(dst->data, src->data); dst->lineno = src->lineno; return dst; } /* Splice a node into an existing filestruct. */ void splice_node(filestruct *begin, filestruct *newnode, filestruct *end) { if (newnode != NULL) { newnode->next = end; newnode->prev = begin; } if (begin != NULL) begin->next = newnode; if (end != NULL) end->prev = newnode; } /* Unlink a node from the rest of the filestruct. */ void unlink_node(const filestruct *fileptr) { assert(fileptr != NULL); if (fileptr->prev != NULL) fileptr->prev->next = fileptr->next; if (fileptr->next != NULL) fileptr->next->prev = fileptr->prev; } /* Delete a node from the filestruct. */ void delete_node(filestruct *fileptr) { if (fileptr != NULL) { if (fileptr->data != NULL) free(fileptr->data); free(fileptr); } } /* Okay, now let's duplicate a whole struct! */ filestruct *copy_filestruct(const filestruct *src) { filestruct *head; /* copy of src, top of the copied list */ filestruct *prev; /* temp that traverses the list */ assert(src != NULL); prev = copy_node(src); prev->prev = NULL; head = prev; src = src->next; while (src != NULL) { prev->next = copy_node(src); prev->next->prev = prev; prev = prev->next; src = src->next; } prev->next = NULL; return head; } /* Frees a filestruct. */ void free_filestruct(filestruct *src) { if (src != NULL) { while (src->next != NULL) { src = src->next; delete_node(src->prev); #ifdef DEBUG fprintf(stderr, "%s: free'd a node, YAY!\n", "delete_node()"); #endif } delete_node(src); #ifdef DEBUG fprintf(stderr, "%s: free'd last node.\n", "delete_node()"); #endif } } void renumber_all(void) { filestruct *temp; int i = 1; assert(fileage == NULL || fileage != fileage->next); for (temp = fileage; temp != NULL; temp = temp->next) temp->lineno = i++; } void renumber(filestruct *fileptr) { if (fileptr == NULL || fileptr->prev == NULL || fileptr == fileage) renumber_all(); else { int lineno = fileptr->prev->lineno; assert(fileptr != fileptr->next); for (; fileptr != NULL; fileptr = fileptr->next) fileptr->lineno = ++lineno; } } /* Print one usage string to the screen, removes lots of duplicate * strings to translate and takes out the parts that shouldn't be * translatable (the flag names). */ void print1opt(const char *shortflag, const char *longflag, const char *desc) { printf(" %s\t", shortflag); if (strlen(shortflag) < 8) printf("\t"); #ifdef HAVE_GETOPT_LONG printf("%s\t", longflag); if (strlen(longflag) < 8) printf("\t\t"); else if (strlen(longflag) < 16) printf("\t"); #endif printf("%s\n", desc); } void usage(void) { #ifdef HAVE_GETOPT_LONG printf(_("Usage: nano [+LINE] [GNU long option] [option] [file]\n\n")); printf(_("Option\t\tLong option\t\tMeaning\n")); #else printf(_("Usage: nano [+LINE] [option] [file]\n\n")); printf(_("Option\t\tMeaning\n")); #endif /* HAVE_GETOPT_LONG */ print1opt("-h, -?", "--help", _("Show this message")); print1opt(_("+LINE"), "", _("Start at line number LINE")); #ifndef NANO_SMALL print1opt("-B", "--backup", _("Backup existing files on save")); print1opt("-D", "--dos", _("Write file in DOS format")); print1opt("-E", "--backupdir=[dir]", _("Directory for writing backup files")); #endif #ifdef ENABLE_MULTIBUFFER print1opt("-F", "--multibuffer", _("Enable multiple file buffers")); #endif #ifdef ENABLE_NANORC #ifndef NANO_SMALL print1opt("-H", "--historylog", _("Log & read search/replace string history")); #endif print1opt("-I", "--ignorercfiles", _("Don't look at nanorc files")); #endif #ifndef NANO_SMALL print1opt("-M", "--mac", _("Write file in Mac format")); print1opt("-N", "--noconvert", _("Don't convert files from DOS/Mac format")); #endif #ifndef DISABLE_JUSTIFY print1opt(_("-Q [str]"), _("--quotestr=[str]"), _("Quoting string, default \"> \"")); #endif #ifdef HAVE_REGEX_H print1opt("-R", "--regexp", _("Do regular expression searches")); #endif #ifndef NANO_SMALL print1opt("-S", "--smooth", _("Smooth scrolling")); #endif print1opt(_("-T [#cols]"), _("--tabsize=[#cols]"), _("Set width of a tab in cols to #cols")); print1opt("-V", "--version", _("Print version information and exit")); #ifdef ENABLE_COLOR print1opt(_("-Y [str]"), _("--syntax [str]"), _("Syntax definition to use")); #endif print1opt(_("-Z"), _("--restricted"), _("Restricted mode")); print1opt("-c", "--const", _("Constantly show cursor position")); #ifndef NANO_SMALL print1opt("-d", "--rebinddelete", _("Fix Backspace/Delete confusion problem")); print1opt("-i", "--autoindent", _("Automatically indent new lines")); print1opt("-k", "--cut", _("Let ^K cut from cursor to end of line")); #endif print1opt("-l", "--nofollow", _("Don't follow symbolic links, overwrite")); #ifndef DISABLE_MOUSE print1opt("-m", "--mouse", _("Enable mouse")); #endif #ifndef DISABLE_OPERATINGDIR print1opt(_("-o [dir]"), _("--operatingdir=[dir]"), _("Set operating directory")); #endif print1opt("-p", "--preserve", _("Preserve XON (^Q) and XOFF (^S) keys")); #ifndef DISABLE_WRAPJUSTIFY print1opt(_("-r [#cols]"), _("--fill=[#cols]"), _("Set fill cols to (wrap lines at) #cols")); #endif #ifndef DISABLE_SPELLER print1opt(_("-s [prog]"), _("--speller=[prog]"), _("Enable alternate speller")); #endif print1opt("-t", "--tempfile", _("Auto save on exit, don't prompt")); print1opt("-v", "--view", _("View (read only) mode")); #ifndef DISABLE_WRAPPING print1opt("-w", "--nowrap", _("Don't wrap long lines")); #endif print1opt("-x", "--nohelp", _("Don't show help window")); print1opt("-z", "--suspend", _("Enable suspend")); /* this is a special case */ printf(" %s\t\t\t%s\n","-a, -b, -e, -f, -g, -j", _("(ignored, for Pico compatibility)")); exit(0); } void version(void) { printf(_(" GNU nano version %s (compiled %s, %s)\n"), VERSION, __TIME__, __DATE__); printf(_ (" Email: nano@nano-editor.org Web: http://www.nano-editor.org/")); printf(_("\n Compiled options:")); #ifndef ENABLE_NLS printf(" --disable-nls"); #endif #ifdef DEBUG printf(" --enable-debug"); #endif #ifdef NANO_EXTRA printf(" --enable-extra"); #endif #ifdef NANO_SMALL printf(" --enable-tiny"); #else #ifdef DISABLE_BROWSER printf(" --disable-browser"); #endif #ifdef DISABLE_HELP printf(" --disable-help"); #endif #ifdef DISABLE_JUSTIFY printf(" --disable-justify"); #endif #ifdef DISABLE_MOUSE printf(" --disable-mouse"); #endif #ifdef DISABLE_OPERATINGDIR printf(" --disable-operatingdir"); #endif #ifdef DISABLE_SPELLER printf(" --disable-speller"); #endif #ifdef DISABLE_TABCOMP printf(" --disable-tabcomp"); #endif #endif /* NANO_SMALL */ #ifdef DISABLE_WRAPPING printf(" --disable-wrapping"); #endif #ifdef DISABLE_ROOTWRAP printf(" --disable-wrapping-as-root"); #endif #ifdef ENABLE_COLOR printf(" --enable-color"); #endif #ifdef ENABLE_MULTIBUFFER printf(" --enable-multibuffer"); #endif #ifdef ENABLE_NANORC printf(" --enable-nanorc"); #endif #ifdef USE_SLANG printf(" --with-slang"); #endif printf("\n"); } int no_help(void) { return ISSET(NO_HELP) ? 2 : 0; } int nano_disabled_msg(void) { statusbar(_("Sorry, support for this function has been disabled")); return 1; } #ifndef NANO_SMALL static int pid; /* This is the PID of the newly forked process * below. It must be global since the signal * handler needs it. */ RETSIGTYPE cancel_fork(int signal) { if (kill(pid, SIGKILL) == -1) nperror("kill"); } int open_pipe(const char *command) { int fd[2]; FILE *f; struct sigaction oldaction, newaction; /* original and temporary handlers for SIGINT */ int cancel_sigs = 0; /* cancel_sigs == 1 means that sigaction() failed without changing * the signal handlers. cancel_sigs == 2 means the signal handler * was changed, but the tcsetattr() didn't succeed. * * I use this variable since it is important to put things back when * we finish, even if we get errors. */ /* Make our pipes. */ if (pipe(fd) == -1) { statusbar(_("Could not pipe")); return 1; } /* Fork a child. */ if ((pid = fork()) == 0) { close(fd[0]); dup2(fd[1], fileno(stdout)); dup2(fd[1], fileno(stderr)); /* If execl() returns at all, there was an error. */ execl("/bin/sh", "sh", "-c", command, 0); exit(0); } /* Else continue as parent. */ close(fd[1]); if (pid == -1) { close(fd[0]); statusbar(_("Could not fork")); return 1; } /* Before we start reading the forked command's output, we set * things up so that ^C will cancel the new process. */ enable_signals(); if (sigaction(SIGINT, NULL, &newaction) == -1) { cancel_sigs = 1; nperror("sigaction"); } else { newaction.sa_handler = cancel_fork; if (sigaction(SIGINT, &newaction, &oldaction) == -1) { cancel_sigs = 1; nperror("sigaction"); } } /* Note that now oldaction is the previous SIGINT signal handler, * to be restored later. */ f = fdopen(fd[0], "rb"); if (f == NULL) nperror("fdopen"); read_file(f, "stdin", 0); /* if multibuffer mode is on, we could be here in view mode; if so, don't set the modification flag */ if (!ISSET(VIEW_MODE)) set_modified(); if (wait(NULL) == -1) nperror("wait"); if (cancel_sigs != 1 && sigaction(SIGINT, &oldaction, NULL) == -1) nperror("sigaction"); disable_signals(); return 0; } #endif /* !NANO_SMALL */ #ifndef DISABLE_MOUSE void do_mouse(void) { int mouse_x, mouse_y; if (get_mouseinput(&mouse_x, &mouse_y, 1) == 0) { /* Click in the edit window to move the cursor, but only when we're not in a subfunction. */ if (wenclose(edit, mouse_y, mouse_x) && currshortcut == main_list) { int sameline; /* Did they click on the line with the cursor? If they clicked on the cursor, we set the mark. */ size_t xcur; /* The character they clicked on. */ /* Subtract out size of topwin. Perhaps we need a constant somewhere? */ mouse_y -= 2; sameline = (mouse_y == current_y); /* Move to where the click occurred. */ for (; current_y < mouse_y && current->next != NULL; current_y++) current = current->next; for (; current_y > mouse_y && current->prev != NULL; current_y--) current = current->prev; xcur = actual_x(current->data, get_page_start(xplustabs()) + mouse_x); /* Selecting where the cursor is toggles the mark. As does selecting beyond the line length with the cursor at the end of the line. */ if (sameline && xcur == current_x) { if (ISSET(VIEW_MODE)) { print_view_warning(); return; } do_mark(); } current_x = xcur; placewewant = xplustabs(); edit_refresh(); } } /* FIXME: If we clicked on a location in the statusbar, the cursor should move to the location we clicked on. */ } #endif /* The user typed a character; add it to the edit buffer. */ void do_char(char ch) { size_t current_len = strlen(current->data); #if !defined(DISABLE_WRAPPING) || defined(ENABLE_COLOR) int refresh = FALSE; /* Do we have to run edit_refresh(), or can we get away with * update_line()? */ #endif if (ch == '\0') /* Null to newline, if needed. */ ch = '\n'; else if (ch == '\n') { /* Newline to Enter, if needed. */ do_enter(); return; } assert(current != NULL && current->data != NULL); /* When a character is inserted on the current magicline, it means * we need a new one! */ if (filebot == current) new_magicline(); /* More dangerousness fun =) */ current->data = charealloc(current->data, current_len + 2); assert(current_x <= current_len); charmove(¤t->data[current_x + 1], ¤t->data[current_x], current_len - current_x + 1); current->data[current_x] = ch; totsize++; set_modified(); #ifndef NANO_SMALL /* Note that current_x has not yet been incremented. */ if (current == mark_beginbuf && current_x < mark_beginx) mark_beginx++; #endif do_right(); #ifndef DISABLE_WRAPPING if (!ISSET(NO_WRAP) && ch != '\t') refresh = do_wrap(current); #endif #ifdef ENABLE_COLOR if (ISSET(COLOR_SYNTAX)) refresh = TRUE; #endif #if !defined(DISABLE_WRAPPING) || defined(ENABLE_COLOR) if (refresh) edit_refresh(); #endif } int do_verbatim_input(void) { int *verbatim_kbinput; /* Used to hold verbatim input. */ size_t verbatim_len; /* Length of verbatim input. */ size_t i; statusbar(_("Verbatim input")); verbatim_kbinput = get_verbatim_kbinput(edit, &verbatim_len, 1); /* Turn on DISABLE_CURPOS while inserting character(s) and turn it * off afterwards, so that if constant cursor position display is * on, it will be updated properly. */ SET(DISABLE_CURPOS); for (i = 0; i < verbatim_len; i++) do_char((char)verbatim_kbinput[i]); UNSET(DISABLE_CURPOS); free(verbatim_kbinput); return 1; } int do_backspace(void) { if (current != fileage || current_x > 0) { do_left(); do_delete(); } return 1; } int do_delete(void) { assert(current != NULL && current->data != NULL && current_x <= strlen(current->data)); placewewant = xplustabs(); if (current->data[current_x] != '\0') { size_t linelen = strlen(current->data + current_x); assert(current_x < strlen(current->data)); /* Let's get dangerous. */ charmove(¤t->data[current_x], ¤t->data[current_x + 1], linelen); null_at(¤t->data, linelen + current_x - 1); #ifndef NANO_SMALL if (current_x < mark_beginx && mark_beginbuf == current) mark_beginx--; #endif } else if (current != filebot && (current->next != filebot || current->data[0] == '\0')) { /* We can delete the line before filebot only if it is blank: it * becomes the new magic line then. */ filestruct *foo = current->next; assert(current_x == strlen(current->data)); current->data = charealloc(current->data, current_x + strlen(foo->data) + 1); strcpy(current->data + current_x, foo->data); #ifndef NANO_SMALL if (mark_beginbuf == current->next) { mark_beginx += current_x; mark_beginbuf = current; } #endif if (filebot == foo) filebot = current; unlink_node(foo); delete_node(foo); renumber(current); totlines--; wrap_reset(); } else return 0; totsize--; set_modified(); edit_refresh(); return 1; } int do_tab(void) { do_char('\t'); return 1; } /* Someone hits return *gasp!* */ int do_enter(void) { filestruct *newnode; char *tmp; newnode = make_new_node(current); assert(current != NULL && current->data != NULL); tmp = ¤t->data[current_x]; #ifndef NANO_SMALL /* Do auto-indenting, like the neolithic Turbo Pascal editor. */ if (ISSET(AUTOINDENT)) { int extra = 0; const char *spc = current->data; while (isblank(*spc)) { extra++; spc++; } /* If current_x < extra, then we are breaking the line in the * indentation. Autoindenting should add only current_x * characters of indentation. */ if (current_x < extra) extra = current_x; else current_x = extra; totsize += extra; newnode->data = charalloc(strlen(tmp) + extra + 1); strncpy(newnode->data, current->data, extra); strcpy(&newnode->data[extra], tmp); } else #endif { current_x = 0; newnode->data = charalloc(strlen(tmp) + 1); strcpy(newnode->data, tmp); } *tmp = '\0'; if (current->next == NULL) filebot = newnode; splice_node(current, newnode, current->next); totsize++; renumber(current); current = newnode; align(¤t->data); /* The logic here is as follows: * -> If we are at the bottom of the buffer, we want to recenter * (read: rebuild) the screen and forcibly move the cursor. * -> otherwise, we want simply to redraw the screen and update * where we think the cursor is. */ if (current_y == editwinrows - 1) { #ifndef NANO_SMALL if (ISSET(SMOOTHSCROLL)) edit_update(current, NONE); else #endif edit_update(current, CENTER); reset_cursor(); } else { current_y++; edit_refresh(); update_cursor(); } totlines++; set_modified(); placewewant = xplustabs(); return 1; } #ifndef NANO_SMALL int do_next_word(void) { assert(current != NULL && current->data != NULL); /* Skip letters in this word first. */ while (current->data[current_x] != '\0' && isalnum((int)current->data[current_x])) current_x++; for (; current != NULL; current = current->next) { while (current->data[current_x] != '\0' && !isalnum((int)current->data[current_x])) current_x++; if (current->data[current_x] != '\0') break; current_x = 0; } if (current == NULL) current = filebot; placewewant = xplustabs(); /* Refresh the screen. If current has run off the bottom, this * call puts it at the center line. */ edit_refresh(); return 0; } /* The same thing for backwards. */ int do_prev_word(void) { assert(current != NULL && current->data != NULL); /* Skip letters in this word first. */ while (current_x >= 0 && isalnum((int)current->data[current_x])) current_x--; for (; current != NULL; current = current->prev) { while (current_x >= 0 && !isalnum((int)current->data[current_x])) current_x--; if (current_x >= 0) break; if (current->prev != NULL) current_x = strlen(current->prev->data); } if (current != NULL) { while (current_x > 0 && isalnum((int)current->data[current_x - 1])) current_x--; } else { current = fileage; current_x = 0; } placewewant = xplustabs(); /* Refresh the screen. If current has run off the top, this call * puts it at the center line. */ edit_refresh(); return 0; } int do_mark(void) { TOGGLE(MARK_ISSET); if (ISSET(MARK_ISSET)) { statusbar(_("Mark Set")); mark_beginbuf = current; mark_beginx = current_x; } else { statusbar(_("Mark UNset")); edit_refresh(); } return 1; } #endif /* !NANO_SMALL */ #ifndef DISABLE_WRAPPING void wrap_reset(void) { same_line_wrap = 0; } #endif #ifndef DISABLE_WRAPPING /* We wrap the given line. Precondition: we assume the cursor has been * moved forward since the last typed character. Return value: * whether we wrapped. */ int do_wrap(filestruct *inptr) { size_t len = strlen(inptr->data); /* length of the line we wrap */ int i = 0; /* generic loop variable */ int wrap_loc = -1; /* index of inptr->data where we wrap */ int word_back = -1; #ifndef NANO_SMALL const char *indentation = NULL; /* indentation to prepend to the new line */ int indent_len = 0; /* strlen(indentation) */ #endif const char *after_break; /* text after the wrap point */ int after_break_len; /* strlen(after_break) */ int wrapping = 0; /* do we prepend to the next line? */ const char *wrap_line = NULL; /* the next line, minus indentation */ int wrap_line_len = 0; /* strlen(wrap_line) */ char *newline = NULL; /* the line we create */ int new_line_len = 0; /* eventual length of newline */ /* There are three steps. First, we decide where to wrap. Then, we * create the new wrap line. Finally, we clean up. */ /* Step 1, finding where to wrap. We are going to add a new-line * after a white-space character. In this step, we set wrap_loc as the * location of this replacement. * * Where should we break the line? We need the last "legal wrap point" * such that the last word before it ended at or before fill. If there * is no such point, we settle for the first legal wrap point. * * A "legal wrap point" is a white-space character that is not followed by * white-space. * * If there is no legal wrap point or we found the last character of the * line, we should return without wrapping. * * Note that the initial indentation does not count as a legal wrap * point if we are going to auto-indent! * * Note that the code below could be optimised, by not calling strnlenpt() * so often. */ #ifndef NANO_SMALL if (ISSET(AUTOINDENT)) i = indent_length(inptr->data); #endif wrap_line = inptr->data + i; for (; i < len; i++, wrap_line++) { /* record where the last word ended */ if (!isblank(*wrap_line)) word_back = i; /* if we have found a "legal wrap point" and the current word * extends too far, then we stop */ if (wrap_loc != -1 && strnlenpt(inptr->data, word_back + 1) > fill) break; /* we record the latest "legal wrap point" */ if (word_back != i && !isblank(wrap_line[1])) wrap_loc = i; } if (wrap_loc < 0 || i == len) return 0; /* Step 2, making the new wrap line. It will consist of indentation + * after_break + " " + wrap_line (although indentation and wrap_line are * conditional on flags and #defines). */ /* after_break is the text that will be moved to the next line. */ after_break = inptr->data + wrap_loc + 1; after_break_len = len - wrap_loc - 1; assert(after_break_len == strlen(after_break)); /* new_line_len will later be increased by the lengths of indentation * and wrap_line. */ new_line_len = after_break_len; /* We prepend the wrapped text to the next line, if the flag is set, * and there is a next line, and prepending would not make the line * too long. */ if (same_line_wrap && inptr->next) { wrap_line = inptr->next->data; wrap_line_len = strlen(wrap_line); /* +1 for the space between after_break and wrap_line */ if ((new_line_len + 1 + wrap_line_len) <= fill) { wrapping = 1; new_line_len += (1 + wrap_line_len); } } #ifndef NANO_SMALL if (ISSET(AUTOINDENT)) { /* Indentation comes from the next line if wrapping, else from * this line. */ indentation = (wrapping ? wrap_line : inptr->data); indent_len = indent_length(indentation); if (wrapping) /* The wrap_line text should not duplicate indentation. * Note in this case we need not increase new_line_len. */ wrap_line += indent_len; else new_line_len += indent_len; } #endif /* Now we allocate the new line and copy into it. */ newline = charalloc(new_line_len + 1); /* +1 for \0 */ *newline = '\0'; #ifndef NANO_SMALL if (ISSET(AUTOINDENT)) { strncpy(newline, indentation, indent_len); newline[indent_len] = '\0'; } #endif strcat(newline, after_break); /* We end the old line after wrap_loc. Note this does not eat the * space. */ null_at(&inptr->data, wrap_loc + 1); totsize++; if (wrapping) { /* In this case, totsize increases by 1 since we add a space * between after_break and wrap_line. If the line already ends * in a tab or a space, we don't add a space and decrement * totsize to account for that. */ if (!isblank(newline[strlen(newline) - 1])) strcat(newline, " "); else totsize--; strcat(newline, wrap_line); free(inptr->next->data); inptr->next->data = newline; } else { filestruct *temp = (filestruct *)nmalloc(sizeof(filestruct)); /* In this case, the file size changes by +1 for the new line, and * +indent_len for the new indentation. */ #ifndef NANO_SMALL totsize += indent_len; #endif totlines++; temp->data = newline; temp->prev = inptr; temp->next = inptr->next; temp->prev->next = temp; /* If temp->next is NULL, then temp is the last line of the * file, so we must set filebot. */ if (temp->next != NULL) temp->next->prev = temp; else filebot = temp; } /* Step 3, clean up. Here we reposition the cursor and mark, and do some * other sundry things. */ /* later wraps of this line will be prepended to the next line. */ same_line_wrap = 1; /* Each line knows its line number. We recalculate these if we * inserted a new line. */ if (!wrapping) renumber(inptr); /* If the cursor was after the break point, we must move it. */ if (current_x > wrap_loc) { current = current->next; current_x -= #ifndef NANO_SMALL -indent_len + #endif wrap_loc + 1; wrap_reset(); placewewant = xplustabs(); } #ifndef NANO_SMALL /* If the mark was on this line after the wrap point, we move it down. * If it was on the next line and we wrapped, we must move it * right. */ if (mark_beginbuf == inptr && mark_beginx > wrap_loc) { mark_beginbuf = inptr->next; mark_beginx -= wrap_loc - indent_len + 1; } else if (wrapping && mark_beginbuf == inptr->next) mark_beginx += after_break_len; #endif /* !NANO_SMALL */ /* Place the cursor. */ reset_cursor(); return 1; } #endif /* !DISABLE_WRAPPING */ #ifndef DISABLE_SPELLER /* A word is misspelled in the file. Let the user replace it. We * return zero if the user cancels. */ int do_int_spell_fix(const char *word) { char *save_search; char *save_replace; filestruct *current_save = current; size_t current_x_save = current_x; filestruct *edittop_save = edittop; /* Save where we are. */ int i = 0; /* The return value. */ int reverse_search_set = ISSET(REVERSE_SEARCH); #ifndef NANO_SMALL int case_sens_set = ISSET(CASE_SENSITIVE); int mark_set = ISSET(MARK_ISSET); SET(CASE_SENSITIVE); /* Make sure the marking highlight is off during spell-check. */ UNSET(MARK_ISSET); #endif /* Make sure spell-check goes forward only. */ UNSET(REVERSE_SEARCH); /* Save the current search/replace strings. */ search_init_globals(); save_search = last_search; save_replace = last_replace; /* Set search/replace strings to misspelled word. */ last_search = mallocstrcpy(NULL, word); last_replace = mallocstrcpy(NULL, word); /* Start from the top of the file. */ current = fileage; current_x = -1; search_last_line = FALSE; /* Find the first whole-word occurrence of word. */ while (findnextstr(TRUE, TRUE, fileage, 0, word, FALSE) != 0) if (is_whole_word(current_x, current->data, word)) { edit_refresh(); do_replace_highlight(TRUE, word); /* Allow the replace word to be corrected. */ i = statusq(FALSE, spell_list, word, #ifndef NANO_SMALL NULL, #endif _("Edit a replacement")); do_replace_highlight(FALSE, word); if (i != -1 && strcmp(word, answer)) { search_last_line = FALSE; current_x--; do_replace_loop(word, current_save, ¤t_x_save, TRUE); } break; } /* Restore the search/replace strings. */ free(last_search); last_search = save_search; free(last_replace); last_replace = save_replace; /* Restore where we were. */ current = current_save; current_x = current_x_save; edittop = edittop_save; /* Restore search/replace direction. */ if (reverse_search_set) SET(REVERSE_SEARCH); #ifndef NANO_SMALL if (!case_sens_set) UNSET(CASE_SENSITIVE); /* Restore marking highlight. */ if (mark_set) SET(MARK_ISSET); #endif return i != -1; } /* Integrated spell checking using 'spell' program. Return value: NULL * for normal termination, otherwise the error string. */ char *do_int_speller(char *tempfile_name) { char *read_buff, *read_buff_ptr, *read_buff_word; size_t pipe_buff_size, read_buff_size, read_buff_read, bytesread; int spell_fd[2], sort_fd[2], uniq_fd[2], tempfile_fd = -1; pid_t pid_spell, pid_sort, pid_uniq; int spell_status, sort_status, uniq_status; /* Create all three pipes up front. */ if (pipe(spell_fd) == -1 || pipe(sort_fd) == -1 || pipe(uniq_fd) == -1) return _("Could not create pipe"); statusbar(_("Creating misspelled word list, please wait...")); /* A new process to run spell in. */ if ((pid_spell = fork()) == 0) { /* Child continues (i.e, future spell process). */ close(spell_fd[0]); /* Replace the standard input with the temp file. */ if ((tempfile_fd = open(tempfile_name, O_RDONLY)) == -1) goto close_pipes_and_exit; if (dup2(tempfile_fd, STDIN_FILENO) != STDIN_FILENO) goto close_pipes_and_exit; close(tempfile_fd); /* Send spell's standard output to the pipe. */ if (dup2(spell_fd[1], STDOUT_FILENO) != STDOUT_FILENO) goto close_pipes_and_exit; close(spell_fd[1]); /* Start spell program; we are using PATH. */ execlp("spell", "spell", NULL); /* Should not be reached, if spell is found. */ exit(1); } /* Parent continues here. */ close(spell_fd[1]); /* A new process to run sort in. */ if ((pid_sort = fork()) == 0) { /* Child continues (i.e, future spell process). Replace the * standard input with the standard output of the old pipe. */ if (dup2(spell_fd[0], STDIN_FILENO) != STDIN_FILENO) goto close_pipes_and_exit; close(spell_fd[0]); /* Send sort's standard output to the new pipe. */ if (dup2(sort_fd[1], STDOUT_FILENO) != STDOUT_FILENO) goto close_pipes_and_exit; close(sort_fd[1]); /* Start sort program. Use -f to remove mixed case without * having to have ANOTHER pipe for tr. If this isn't portable, * let me know. */ execlp("sort", "sort", "-f", NULL); /* Should not be reached, if sort is found. */ exit(1); } close(spell_fd[0]); close(sort_fd[1]); /* A new process to run uniq in. */ if ((pid_uniq = fork()) == 0) { /* Child continues (i.e, future uniq process). Replace the * standard input with the standard output of the old pipe. */ if (dup2(sort_fd[0], STDIN_FILENO) != STDIN_FILENO) goto close_pipes_and_exit; close(sort_fd[0]); /* Send uniq's standard output to the new pipe. */ if (dup2(uniq_fd[1], STDOUT_FILENO) != STDOUT_FILENO) goto close_pipes_and_exit; close(uniq_fd[1]); /* Start uniq program; we are using PATH. */ execlp("uniq", "uniq", NULL); /* Should not be reached, if uniq is found. */ exit(1); } close(sort_fd[0]); close(uniq_fd[1]); /* Child process was not forked successfully. */ if (pid_spell < 0 || pid_sort < 0 || pid_uniq < 0) { close(uniq_fd[0]); return _("Could not fork"); } /* Get system pipe buffer size. */ if ((pipe_buff_size = fpathconf(uniq_fd[0], _PC_PIPE_BUF)) < 1) { close(uniq_fd[0]); return _("Could not get size of pipe buffer"); } /* Read in the returned spelling errors. */ read_buff_read = 0; read_buff_size = pipe_buff_size + 1; read_buff = read_buff_ptr = charalloc(read_buff_size); while ((bytesread = read(uniq_fd[0], read_buff_ptr, pipe_buff_size)) > 0) { read_buff_read += bytesread; read_buff_size += pipe_buff_size; read_buff = read_buff_ptr = charealloc(read_buff, read_buff_size); read_buff_ptr += read_buff_read; } *read_buff_ptr = (char)NULL; close(uniq_fd[0]); /* Process the spelling errors. */ read_buff_word = read_buff_ptr = read_buff; while (*read_buff_ptr != '\0') { if ((*read_buff_ptr == '\n') || (*read_buff_ptr == '\r')) { *read_buff_ptr = (char)NULL; if (read_buff_word != read_buff_ptr) { if (!do_int_spell_fix(read_buff_word)) { read_buff_word = read_buff_ptr; break; } } read_buff_word = read_buff_ptr + 1; } read_buff_ptr++; } /* Special case where last word doesn't end with \n or \r. */ if (read_buff_word != read_buff_ptr) do_int_spell_fix(read_buff_word); free(read_buff); replace_abort(); edit_refresh(); /* Process end of spell process. */ waitpid(pid_spell, &spell_status, 0); waitpid(pid_sort, &sort_status, 0); waitpid(pid_uniq, &uniq_status, 0); if (WIFEXITED(spell_status) == 0 || WEXITSTATUS(spell_status)) return _("Error invoking \"spell\""); if (WIFEXITED(sort_status) == 0 || WEXITSTATUS(sort_status)) return _("Error invoking \"sort -f\""); if (WIFEXITED(uniq_status) == 0 || WEXITSTATUS(uniq_status)) return _("Error invoking \"uniq\""); /* Otherwise... */ return NULL; close_pipes_and_exit: /* Don't leak any handles. */ close(tempfile_fd); close(spell_fd[0]); close(spell_fd[1]); close(sort_fd[0]); close(sort_fd[1]); close(uniq_fd[0]); close(uniq_fd[1]); exit(1); } /* External spell checking. Return value: NULL for normal termination, * otherwise the error string. */ char *do_alt_speller(char *tempfile_name) { int alt_spell_status, lineno_cur = current->lineno; int x_cur = current_x, y_cur = current_y, pww_cur = placewewant; pid_t pid_spell; char *ptr; static int arglen = 3; static char **spellargs = (char **)NULL; #ifndef NANO_SMALL int mark_set = ISSET(MARK_ISSET); int mbb_lineno_cur = 0; /* We're going to close the current file, and open the output of * the alternate spell command. The line that mark_beginbuf * points to will be freed, so we save the line number and * restore afterwards. */ if (mark_set) { mbb_lineno_cur = mark_beginbuf->lineno; UNSET(MARK_ISSET); } #endif endwin(); /* Set up an argument list to pass execvp(). */ if (spellargs == NULL) { spellargs = (char **)nmalloc(arglen * sizeof(char *)); spellargs[0] = strtok(alt_speller, " "); while ((ptr = strtok(NULL, " ")) != NULL) { arglen++; spellargs = (char **)nrealloc(spellargs, arglen * sizeof(char *)); spellargs[arglen - 3] = ptr; } spellargs[arglen - 1] = NULL; } spellargs[arglen - 2] = tempfile_name; /* Start a new process for the alternate speller. */ if ((pid_spell = fork()) == 0) { /* Start alternate spell program; we are using PATH. */ execvp(spellargs[0], spellargs); /* Should not be reached, if alternate speller is found!!! */ exit(1); } /* Could not fork?? */ if (pid_spell < 0) return _("Could not fork"); /* Wait for alternate speller to complete. */ wait(&alt_spell_status); if (!WIFEXITED(alt_spell_status) || WEXITSTATUS(alt_spell_status) != 0) { char *altspell_error = NULL; char *invoke_error = _("Could not invoke \"%s\""); int msglen = strlen(invoke_error) + strlen(alt_speller) + 2; altspell_error = charalloc(msglen); snprintf(altspell_error, msglen, invoke_error, alt_speller); return altspell_error; } refresh(); #ifndef NANO_SMALL if (!mark_set) { /* Only reload the temp file if it isn't a marked selection. */ #endif free_filestruct(fileage); global_init(1); open_file(tempfile_name, 0, 1); #ifndef NANO_SMALL } if (mark_set) { do_gotopos(mbb_lineno_cur, mark_beginx, y_cur, 0); mark_beginbuf = current; /* In case the line got shorter, assign mark_beginx. */ mark_beginx = current_x; SET(MARK_ISSET); } #endif /* Go back to the old position, mark the file as modified, and make * sure that the titlebar is refreshed. */ do_gotopos(lineno_cur, x_cur, y_cur, pww_cur); set_modified(); clearok(topwin, FALSE); titlebar(NULL); return NULL; } int do_spell(void) { int i; char *temp, *spell_msg; if ((temp = safe_tempnam(0, "nano.")) == NULL) { statusbar(_("Could not create a temporary filename: %s"), strerror(errno)); return 0; } #ifndef NANO_SMALL if (ISSET(MARK_ISSET)) i = write_marked(temp, 1, 0, 0); else #endif i = write_file(temp, 1, 0, 0); if (i == -1) { statusbar(_("Spell checking failed: unable to write temp file!")); free(temp); return 0; } #ifdef ENABLE_MULTIBUFFER /* Update the current open_files entry before spell-checking, in * case any problems occur. */ add_open_file(1); #endif if (alt_speller != NULL) spell_msg = do_alt_speller(temp); else spell_msg = do_int_speller(temp); unlink(temp); free(temp); if (spell_msg != NULL) { statusbar(_("Spell checking failed: %s"), spell_msg); return 0; } statusbar(_("Finished checking spelling")); return 1; } #endif /* !DISABLE_SPELLER */ #if !defined(NANO_SMALL) || !defined(DISABLE_JUSTIFY) /* The "indentation" of a line is the white-space between the quote part * and the non-white-space of the line. */ size_t indent_length(const char *line) { size_t len = 0; assert(line != NULL); while (isblank(*line)) { line++; len++; } return len; } #endif /* !NANO_SMALL || !DISABLE_JUSTIFY */ #ifndef DISABLE_JUSTIFY /* justify_format() replaces Tab by Space and multiple spaces by 1 * (except it maintains 2 after a . ! or ?). Note the terminating \0 * counts as a space. * * justify_format() might make line->data shorter, and change the actual * pointer with null_at(). * * justify_format() will not look at the first skip characters of line. * skip should be at most strlen(line->data). The character at * line[skip + 1] must not be whitespace. */ void justify_format(filestruct *line, size_t skip) { const char *punct = ".?!"; const char *brackets = "'\")}]>"; char *back, *front; /* These four asserts are assumptions about the input data. */ assert(line != NULL); assert(line->data != NULL); assert(skip < strlen(line->data)); assert(!isblank(line->data[skip])); back = line->data + skip; for (front = back; ; front++) { int remove_space = FALSE; /* Do we want to remove this space? */ if (*front == '\t') *front = ' '; /* These tests are safe since line->data + skip is not a * space. */ if ((*front == '\0' || *front == ' ') && *(front - 1) == ' ') { const char *bob = front - 2; remove_space = TRUE; for (bob = back - 2; bob >= line->data + skip; bob--) { if (strchr(punct, *bob) != NULL) { remove_space = FALSE; break; } if (strchr(brackets, *bob) == NULL) break; } } if (remove_space) { /* Now *front is a space we want to remove. We do that by * simply failing to assign it to *back. */ #ifndef NANO_SMALL if (mark_beginbuf == line && back - line->data < mark_beginx) mark_beginx--; #endif if (*front == '\0') *(back - 1) = '\0'; } else { *back = *front; back++; } if (*front == '\0') break; } back--; assert(*back == '\0' && *front == '\0'); /* Now back is the new end of line->data. */ if (back != front) { totsize -= front - back; null_at(&line->data, back - line->data); #ifndef NANO_SMALL if (mark_beginbuf == line && back - line->data < mark_beginx) mark_beginx = back - line->data; #endif } } /* The "quote part" of a line is the largest initial substring matching * the quote string. This function returns the length of the quote part * of the given line. * * Note that if !HAVE_REGEX_H then we match concatenated copies of * quotestr. */ #ifdef HAVE_REGEX_H size_t quote_length(const char *line, const regex_t *qreg) { regmatch_t matches; int rc = regexec(qreg, line, 1, &matches, 0); if (rc == REG_NOMATCH || matches.rm_so == (regoff_t) -1) return 0; /* matches.rm_so should be 0, since the quote string should start with * the caret ^. */ return matches.rm_eo; } #else /* !HAVE_REGEX_H */ size_t quote_length(const char *line) { size_t qdepth = 0; size_t qlen = strlen(quotestr); /* Compute quote depth level */ while (!strcmp(line + qdepth, quotestr)) qdepth += qlen; return qdepth; } #endif /* !HAVE_REGEX_H */ /* a_line and b_line are lines of text. The quotation part of a_line is * the first a_quote characters. Check that the quotation part of * b_line is the same. */ int quotes_match(const char *a_line, size_t a_quote, IFREG(const char *b_line, const regex_t *qreg)) { /* Here is the assumption about a_quote: */ assert(a_quote == quote_length(IFREG(a_line, qreg))); return a_quote == quote_length(IFREG(b_line, qreg)) && !strncmp(a_line, b_line, a_quote); } /* We assume a_line and b_line have no quote part. Then, we return whether * b_line could follow a_line in a paragraph. */ size_t indents_match(const char *a_line, size_t a_indent, const char *b_line, size_t b_indent) { assert(a_indent == indent_length(a_line)); assert(b_indent == indent_length(b_line)); return b_indent <= a_indent && !strncmp(a_line, b_line, b_indent); } /* Put the next par_len lines, starting with first_line, in the cut * buffer, not allowing them to be concatenated. We assume there are * enough lines after first_line. We leave copies of the lines in * place, too. We return the new copy of first_line. */ filestruct *backup_lines(filestruct *first_line, size_t par_len, size_t quote_len) { /* We put the original lines, not copies, into the cutbuffer, just * out of a misguided sense of consistency, so if you uncut, you get * the actual same paragraph back, not a copy. */ filestruct *alice = first_line; set_modified(); cutbuffer = NULL; for (; par_len > 0; par_len--) { filestruct *bob = copy_node(alice); if (alice == first_line) first_line = bob; if (alice == current) current = bob; if (alice == edittop) edittop = bob; #ifndef NANO_SMALL if (alice == mark_beginbuf) mark_beginbuf = bob; #endif justify_format(bob, quote_len + indent_length(bob->data + quote_len)); assert(alice != NULL && bob != NULL); add_to_cutbuffer(alice, FALSE); splice_node(bob->prev, bob, bob->next); alice = bob->next; } return first_line; } /* Is it possible to break line at or before goal? */ int breakable(const char *line, int goal) { for (; *line != '\0' && goal >= 0; line++) { if (isblank(*line)) return TRUE; if (is_cntrl_char(*line) != 0) goal -= 2; else goal -= 1; } /* If goal is not negative, the whole line (one word) was short * enough. */ return goal >= 0; } /* We are trying to break a chunk off line. We find the last space such * that the display length to there is at most goal + 1. If there is * no such space, and force is not 0, then we find the first space. * Anyway, we then take the last space in that group of spaces. The * terminating '\0' counts as a space. */ int break_line(const char *line, int goal, int force) { /* Note that we use int instead of size_t, since goal is at most COLS, * the screen width, which will always be reasonably small. */ int space_loc = -1; /* Current tentative return value. Index of the last space we * found with short enough display width. */ int cur_loc = 0; /* Current index in line. */ assert(line != NULL); for (; *line != '\0' && goal >= 0; line++, cur_loc++) { if (*line == ' ') space_loc = cur_loc; assert(*line != '\t'); if (is_cntrl_char(*line)) goal -= 2; else goal--; } if (goal >= 0) /* In fact, the whole line displays shorter than goal. */ return cur_loc; if (space_loc == -1) { /* No space found short enough. */ if (force) for (; *line != '\0'; line++, cur_loc++) if (*line == ' ' && *(line + 1) != ' ' && *(line + 1) != '\0') return cur_loc; return -1; } /* Perhaps the character after space_loc is a space. But because * of justify_format(), there can be only two adjacent. */ if (*(line - cur_loc + space_loc + 1) == ' ' || *(line - cur_loc + space_loc + 1) == '\0') space_loc++; return space_loc; } /* Search a paragraph. If search_type is 0, search for the beginning of * the current paragraph or, if we're at the end of it, the beginning of * the next paragraph. If search_type is 1, search for the beginning of * the current paragraph or, if we're already there, the beginning of * the previous paragraph. If search_type is 2, search for the end of * the current paragraph or, if we're already there, the end of the next * paragraph. Afterwards, save the quote length, paragraph length, and * indentation length in *quote, *par, and *indent if they aren't NULL, * and refresh the screen if do_refresh is nonzero. Return 0 if we * found a paragraph, or 1 if there was an error or we didn't find a * paragraph. * * To explain the searching algorithm, I first need to define some * phrases about paragraphs and quotation: * A line of text consists of a "quote part", followed by an * "indentation part", followed by text. The functions quote_length() * and indent_length() calculate these parts. * * A line is "part of a paragraph" if it has a part not in the quote * part or the indentation. * * A line is "the beginning of a paragraph" if it is part of a * paragraph and * 1) it is the top line of the file, or * 2) the line above it is not part of a paragraph, or * 3) the line above it does not have precisely the same quote * part, or * 4) the indentation of this line is not an initial substring of * the indentation of the previous line, or * 5) this line has no quote part and some indentation, and * AUTOINDENT is not set. * The reason for number 5) is that if AUTOINDENT is not set, then an * indented line is expected to start a paragraph, like in books. * Thus, nano can justify an indented paragraph only if AUTOINDENT is * turned on. * * A contiguous set of lines is a "paragraph" if each line is part of * a paragraph and only the first line is the beginning of a * paragraph. */ int do_para_search(int search_type, size_t *quote, size_t *par, size_t *indent, int do_refresh) { size_t quote_len; /* Length of the initial quotation of the paragraph we * search. */ size_t par_len; /* Number of lines in that paragraph. */ /* We save this global variable to see if we're where we started * when searching for the beginning of the paragraph. */ filestruct *current_save = current; size_t indent_len; /* Generic indentation length. */ filestruct *line; /* Generic line of text. */ static int do_restart = 1; /* Whether we're restarting when searching for the beginning * line of the paragraph. */ #ifdef HAVE_REGEX_H regex_t qreg; /* qreg is the compiled quotation regexp. We no * longer care about quotestr. */ int rc = regcomp(&qreg, quotestr, REG_EXTENDED); if (rc != 0) { size_t size = regerror(rc, &qreg, NULL, 0); char *strerror = charalloc(size); regerror(rc, &qreg, strerror, size); statusbar(_("Bad quote string %s: %s"), quotestr, strerror); free(strerror); return 1; } #endif /* Here is an assumption that is always true anyway. */ assert(current != NULL); current_x = 0; restart_para_search: /* Here we find the first line of the paragraph to search. If the * current line is in a paragraph, then we move back to the first * line. Otherwise, we move to the first line that is in a * paragraph. */ quote_len = quote_length(IFREG(current->data, &qreg)); indent_len = indent_length(current->data + quote_len); if (current->data[quote_len + indent_len] != '\0') { /* This line is part of a paragraph. So we must search back to * the first line of this paragraph. First we check items 1) * and 3) above. */ while (current->prev != NULL && quotes_match(current->data, quote_len, IFREG(current->prev->data, &qreg))) { size_t temp_id_len = indent_length(current->prev->data + quote_len); /* The indentation length of the previous line. */ /* Is this line the beginning of a paragraph, according to * items 2), 5), or 4) above? If so, stop. */ if (current->prev->data[quote_len + temp_id_len] == '\0' || (quote_len == 0 && indent_len > 0 #ifndef NANO_SMALL && !ISSET(AUTOINDENT) #endif ) || !indents_match(current->prev->data + quote_len, temp_id_len, current->data + quote_len, indent_len)) break; indent_len = temp_id_len; current = current->prev; current_y--; } } else if (search_type == 1) { /* This line is not part of a paragraph. Move up until we get * to a non "blank" line, and then move down once. */ do { /* There is no previous paragraph, so nothing to move to. */ if (current->prev == NULL) { placewewant = 0; if (do_refresh) edit_refresh(); #ifdef HAVE_REGEX_H if (!do_restart) regfree(&qreg); #endif return 1; } current = current->prev; current_y--; quote_len = quote_length(IFREG(current->data, &qreg)); indent_len = indent_length(current->data + quote_len); } while (current->data[quote_len + indent_len] == '\0'); current = current->next; } else { /* This line is not part of a paragraph. Move down until we get * to a non "blank" line. */ do { /* There is no next paragraph, so nothing to move to. */ if (current->next == NULL) { placewewant = 0; if (do_refresh) edit_refresh(); #ifdef HAVE_REGEX_H regfree(&qreg); #endif return 1; } current = current->next; current_y++; quote_len = quote_length(IFREG(current->data, &qreg)); indent_len = indent_length(current->data + quote_len); } while (current->data[quote_len + indent_len] == '\0'); } /* Now current is the first line of the paragraph, and quote_len is * the quotation length of that line. */ /* Next step, compute par_len, the number of lines in this * paragraph. */ line = current; par_len = 1; indent_len = indent_length(line->data + quote_len); while (line->next != NULL && quotes_match(current->data, quote_len, IFREG(line->next->data, &qreg))) { size_t temp_id_len = indent_length(line->next->data + quote_len); if (!indents_match(line->data + quote_len, indent_len, line->next->data + quote_len, temp_id_len) || line->next->data[quote_len + temp_id_len] == '\0' || (quote_len == 0 && temp_id_len > 0 #ifndef NANO_SMALL && !ISSET(AUTOINDENT) #endif )) break; indent_len = temp_id_len; line = line->next; par_len++; } if (search_type == 1) { /* We're on the same line we started on. Move up until we get * to a non-"blank" line, restart the search from there until we * find a line that's part of a paragraph, and search once more * so that we end up at the beginning of that paragraph. */ if (current != fileage && current == current_save && do_restart) { while (current->prev != NULL) { size_t i, j = 0; current = current->prev; current_y--; /* Skip over lines consisting only of spacing * characters, as searching for the end of the paragraph * does. */ for (i = 0; current->data[i] != '\0'; i++) { if (isblank(current->data[i])) j++; else { i = 0; j = 1; break; } } if (i != j && strlen(current->data) >= (quote_len + indent_len) && current->data[quote_len + indent_len] != '\0') { do_restart = 0; break; } } goto restart_para_search; } else do_restart = 1; } #ifdef HAVE_REGEX_H /* We no longer need to check quotation. */ regfree(&qreg); #endif /* Now par_len is the number of lines in this paragraph. We should * never call quotes_match() or quote_length() again. */ /* If we're searching for the end of the paragraph, move down the * number of lines in the paragraph. */ if (search_type == 2) { for (; par_len > 0; current_y++, par_len--) current = current->next; } /* Refresh the screen if needed. */ if (do_refresh) edit_refresh(); /* Save the values of quote_len, par_len, and indent_len if * needed. */ if (quote != NULL) *quote = quote_len; if (par != NULL) *par = par_len; if (indent != NULL) *indent = indent_len; return 0; } int do_para_begin(void) { return do_para_search(1, NULL, NULL, NULL, TRUE); } int do_para_end(void) { return do_para_search(2, NULL, NULL, NULL, TRUE); } /* If full_justify is TRUE, justify the entire file. Otherwise, justify * the current paragraph. */ int do_justify(int full_justify) { size_t quote_len; /* Length of the initial quotation of the paragraph we * justify. */ size_t par_len; /* Number of lines in that paragraph. */ filestruct *first_par_line = NULL; /* Will be the first line of the resulting justified paragraph. * For restoring after uncut. */ filestruct *last_par_line; /* Will be the last line of the result, also for uncut. */ filestruct *cutbuffer_save = cutbuffer; /* When the paragraph gets modified, all lines from the changed * one down are stored in the cutbuffer. We back up the * original to restore it later. */ /* We save these global variables to be restored if the user * unjustifies. Note we don't need to save totlines. */ int current_x_save = current_x; int current_y_save = current_y; filestruct *current_save = current; int flags_save = flags; long totsize_save = totsize; filestruct *edittop_save = edittop; #ifndef NANO_SMALL filestruct *mark_beginbuf_save = mark_beginbuf; int mark_beginx_save = mark_beginx; #endif size_t indent_len; /* Generic indentation length. */ size_t i; /* Generic loop variable. */ /* If we're justifying the entire file, start at the beginning. */ if (full_justify) current = fileage; last_par_line = current; while (TRUE) { /* First, search for the beginning of the current paragraph or, * if we're at the end of it, the beginning of the next * paragraph. Save the quote length, paragraph length, and * indentation length and don't refresh the screen yet (since * we'll do that after we justify). If the search failed and * we're justifying the whole file, move the last line of the * text we're justifying to just before the magicline, which is * where it'll be anyway if we've searched the entire file, and * break out of the loop; otherwise, refresh the screen and get * out. */ if (do_para_search(0, "e_len, &par_len, &indent_len, FALSE) != 0) { if (full_justify) { /* This should be safe in the event of filebot->prev's * being NULL, since only last_par_line->next is used if * we eventually unjustify. */ last_par_line = filebot->prev; break; } else { edit_refresh(); return 0; } } /* Next step, we loop through the lines of this paragraph, * justifying each one individually. */ for (; par_len > 0; current_y++, par_len--) { size_t line_len; size_t display_len; /* The width of current in screen columns. */ int break_pos; /* Where we will break the line. */ indent_len = indent_length(current->data + quote_len) + quote_len; /* justify_format() removes excess spaces from the line, and * changes tabs to spaces. After calling it, we call * backup_lines(), which copies the original paragraph to * the cutbuffer for unjustification and then calls * justify_format() on the remaining lines. */ justify_format(current, indent_len); if (first_par_line == NULL) first_par_line = backup_lines(current, full_justify ? filebot->lineno - current->lineno : par_len, quote_len); line_len = strlen(current->data); display_len = strlenpt(current->data); if (display_len > fill) { /* The line is too long. Try to wrap it to the next. */ break_pos = break_line(current->data + indent_len, fill - strnlenpt(current->data, indent_len), TRUE); if (break_pos == -1 || break_pos + indent_len == line_len) /* We can't break the line, or don't need to, so * just go on to the next. */ goto continue_loc; break_pos += indent_len; assert(break_pos < line_len); if (par_len == 1) { /* There is no next line in this paragraph. We make * a new line and copy text after break_pos into * it. */ splice_node(current, make_new_node(current), current->next); /* In a non-quoted paragraph, we copy the indent * only if AUTOINDENT is turned on. */ if (quote_len == 0 #ifndef NANO_SMALL && !ISSET(AUTOINDENT) #endif ) indent_len = 0; current->next->data = charalloc(indent_len + line_len - break_pos); strncpy(current->next->data, current->data, indent_len); strcpy(current->next->data + indent_len, current->data + break_pos + 1); assert(strlen(current->next->data) == indent_len + line_len - break_pos - 1); totlines++; totsize += indent_len; par_len++; } else { size_t next_line_len = strlen(current->next->data); indent_len = quote_len + indent_length(current->next->data + quote_len); current->next->data = charealloc(current->next->data, next_line_len + line_len - break_pos + 1); charmove(current->next->data + indent_len + line_len - break_pos, current->next->data + indent_len, next_line_len - indent_len + 1); strcpy(current->next->data + indent_len, current->data + break_pos + 1); current->next->data[indent_len + line_len - break_pos - 1] = ' '; #ifndef NANO_SMALL if (mark_beginbuf == current->next) { if (mark_beginx < indent_len) mark_beginx = indent_len; mark_beginx += line_len - break_pos; } #endif } #ifndef NANO_SMALL if (mark_beginbuf == current && mark_beginx > break_pos) { mark_beginbuf = current->next; mark_beginx -= break_pos + 1 - indent_len; } #endif null_at(¤t->data, break_pos); current = current->next; } else if (display_len < fill && par_len > 1) { size_t next_line_len; indent_len = quote_len + indent_length(current->next->data + quote_len); /* If we can't pull a word from the next line up to this * one, just go on. */ if (!breakable(current->next->data + indent_len, fill - display_len - 1)) goto continue_loc; break_pos = break_line(current->next->data + indent_len, fill - display_len - 1, FALSE); assert(break_pos != -1); current->data = charealloc(current->data, line_len + break_pos + 2); current->data[line_len] = ' '; strncpy(current->data + line_len + 1, current->next->data + indent_len, break_pos); current->data[line_len + break_pos + 1] = '\0'; #ifndef NANO_SMALL if (mark_beginbuf == current->next) { if (mark_beginx < indent_len + break_pos) { mark_beginbuf = current; if (mark_beginx <= indent_len) mark_beginx = line_len + 1; else mark_beginx = line_len + 1 + mark_beginx - indent_len; } else mark_beginx -= break_pos + 1; } #endif next_line_len = strlen(current->next->data); if (indent_len + break_pos == next_line_len) { filestruct *line = current->next; /* Don't destroy edittop! */ if (line == edittop) edittop = current; unlink_node(line); delete_node(line); totlines--; totsize -= indent_len; current_y--; } else { charmove(current->next->data + indent_len, current->next->data + indent_len + break_pos + 1, next_line_len - break_pos - indent_len); null_at(¤t->next->data, next_line_len - break_pos); current = current->next; } } else continue_loc: /* Go to the next line. */ current = current->next; /* If the line we were on before still exists, and it was * not the last line of the paragraph, add a space to the * end of it to replace the one removed by * justify_format(). */ if (current->prev != NULL && par_len > 1) { size_t prev_line_len = strlen(current->prev->data); current->prev->data = charealloc(current->prev->data, prev_line_len + 2); current->prev->data[prev_line_len] = ' '; current->prev->data[prev_line_len + 1] = '\0'; totsize++; } } /* We've just justified a paragraph. If we're not justifying the * entire file, break out of the loop. Otherwise, continue the * loop so that we justify all the paragraphs in the file. */ if (!full_justify) break; } /* while (TRUE) */ /* We are now done justifying the paragraph or the file, so clean * up. totlines, totsize, and current_y have been maintained above. * Set last_par_line to the new end of the paragraph, update * fileage, and set current_x. Also, edit_refresh() needs the line * numbers to be right, so renumber(). */ last_par_line = current->prev; if (first_par_line->prev == NULL) fileage = first_par_line; renumber(first_par_line); edit_refresh(); statusbar(_("Can now UnJustify!")); /* Display the shortcut list with UnJustify. */ shortcut_init(1); display_main_list(); reset_cursor(); /* Now get a keystroke and see if it's unjustify; if not, unget the * keystroke and return. */ { int meta_key; i = get_kbinput(edit, &meta_key); #ifndef DISABLE_MOUSE /* If it was a mouse click, parse it with do_mouse() and it * might become the unjustify key. Else give it back to the * input stream. */ if (i == KEY_MOUSE) do_mouse(); else ungetch(i); i = get_kbinput(edit, &meta_key); #endif } if (i != NANO_UNJUSTIFY_KEY && i != NANO_UNJUSTIFY_FKEY) { ungetch(i); placewewant = 0; } else { /* Else restore the justify we just did (ungrateful user!). */ filestruct *cutbottom = get_cutbottom(); current = current_save; current_x = current_x_save; current_y = current_y_save; edittop = edittop_save; /* Splice the cutbuffer back into the file. */ cutbottom->next = last_par_line->next; cutbottom->next->prev = cutbottom; /* The line numbers after the end of the paragraph have been * changed, so we change them back. */ renumber(cutbottom->next); if (first_par_line->prev != NULL) { cutbuffer->prev = first_par_line->prev; cutbuffer->prev->next = cutbuffer; } else fileage = cutbuffer; cutbuffer = NULL; last_par_line->next = NULL; free_filestruct(first_par_line); /* Restore global variables from before the justify. */ totsize = totsize_save; totlines = filebot->lineno; #ifndef NANO_SMALL mark_beginbuf = mark_beginbuf_save; mark_beginx = mark_beginx_save; #endif flags = flags_save; if (!ISSET(MODIFIED)) { titlebar(NULL); wrefresh(topwin); } edit_refresh(); } cutbuffer = cutbuffer_save; blank_statusbar_refresh(); /* Display the shortcut list with UnCut. */ shortcut_init(0); display_main_list(); return 0; } int do_justify_void(void) { return do_justify(FALSE); } int do_full_justify(void) { return do_justify(TRUE); } #endif /* !DISABLE_JUSTIFY */ int do_exit(void) { int i; if (!ISSET(MODIFIED)) { #ifdef ENABLE_MULTIBUFFER if (!close_open_file()) { display_main_list(); return 1; } else #endif finish(0); } if (ISSET(TEMP_OPT)) i = 1; else i = do_yesno(FALSE, _("Save modified buffer (ANSWERING \"No\" WILL DESTROY CHANGES) ? ")); #ifdef DEBUG dump_buffer(fileage); #endif if (i == 1) { if (do_writeout(TRUE) > 0) { #ifdef ENABLE_MULTIBUFFER if (!close_open_file()) { display_main_list(); return 1; } else #endif finish(0); } } else if (i == 0) { #ifdef ENABLE_MULTIBUFFER if (!close_open_file()) { display_main_list(); return 1; } else #endif finish(0); } else statusbar(_("Cancelled")); display_main_list(); return 1; } void signal_init(void) { /* Trap SIGINT and SIGQUIT because we want them to do useful * things. */ memset(&act, 0, sizeof(struct sigaction)); act.sa_handler = SIG_IGN; sigaction(SIGINT, &act, NULL); sigaction(SIGQUIT, &act, NULL); /* Trap SIGHUP and SIGTERM because we want to write the file out. */ act.sa_handler = handle_hupterm; sigaction(SIGHUP, &act, NULL); sigaction(SIGTERM, &act, NULL); #ifndef NANO_SMALL /* Trap SIGWINCH because we want to handle window resizes. */ act.sa_handler = handle_sigwinch; sigaction(SIGWINCH, &act, NULL); allow_pending_sigwinch(FALSE); #endif /* Trap normal suspend (^Z) so we can handle it ourselves. */ if (!ISSET(SUSPEND)) { act.sa_handler = SIG_IGN; sigaction(SIGTSTP, &act, NULL); } else { /* Block all other signals in the suspend and continue handlers. * If we don't do this, other stuff interrupts them! */ sigfillset(&act.sa_mask); act.sa_handler = do_suspend; sigaction(SIGTSTP, &act, NULL); act.sa_handler = do_cont; sigaction(SIGCONT, &act, NULL); } } /* Handler for SIGHUP (hangup) and SIGTERM (terminate). */ RETSIGTYPE handle_hupterm(int signal) { die(_("Received SIGHUP or SIGTERM\n")); } /* Handler for SIGTSTP (suspend). */ RETSIGTYPE do_suspend(int signal) { endwin(); printf("\n\n\n\n\n%s\n", _("Use \"fg\" to return to nano")); fflush(stdout); /* Restore the old terminal settings. */ tcsetattr(0, TCSANOW, &oldterm); /* Trap SIGHUP and SIGTERM so we can properly deal with them while * suspended. */ act.sa_handler = handle_hupterm; sigaction(SIGHUP, &act, NULL); sigaction(SIGTERM, &act, NULL); /* Do what mutt does: send ourselves a SIGSTOP. */ kill(0, SIGSTOP); } /* Handler for SIGCONT (continue after suspend). */ RETSIGTYPE do_cont(int signal) { #ifndef NANO_SMALL /* Perhaps the user resized the window while we slept. Handle it * and update the screen in the process. */ handle_sigwinch(0); #else /* Just update the screen. */ doupdate(); #endif } #ifndef NANO_SMALL void handle_sigwinch(int s) { const char *tty = ttyname(0); int fd; int result = 0; struct winsize win; if (tty == NULL) return; fd = open(tty, O_RDWR); if (fd == -1) return; result = ioctl(fd, TIOCGWINSZ, &win); close(fd); if (result == -1) return; /* Could check whether the COLS or LINES changed, and return * otherwise. EXCEPT, that COLS and LINES are ncurses global * variables, and in some cases ncurses has already updated them. * But not in all cases, argh. */ COLS = win.ws_col; LINES = win.ws_row; editwinrows = LINES - 5 + no_help(); if (editwinrows < MIN_EDITOR_ROWS || COLS < MIN_EDITOR_COLS) die_too_small(); #ifndef DISABLE_WRAPJUSTIFY fill = wrap_at; if (fill <= 0) fill += COLS; if (fill < 0) fill = 0; #endif hblank = charealloc(hblank, COLS + 1); memset(hblank, ' ', COLS); hblank[COLS] = '\0'; #ifdef USE_SLANG /* Slang curses emulation brain damage, part 1: If we just do what * curses does here, it'll only work properly if the resize made the * window smaller. Do what mutt does: Leave and immediately reenter * Slang screen management mode. */ SLsmg_reset_smg(); SLsmg_init_smg(); #else /* Do the equivalent of what Minimum Profit does: Leave and * immediately reenter curses mode. */ endwin(); refresh(); #endif /* Do the equivalent of what both mutt and Minimum Profit do: * Reinitialize all the windows based on the new screen * dimensions. */ window_init(); /* Redraw the contents of the windows that need it. */ blank_statusbar(); display_main_list(); total_refresh(); /* Turn cursor back on for sure. */ curs_set(1); /* Restore the terminal to its previously saved state. */ resetty(); /* Jump back to the main loop. */ siglongjmp(jmpbuf, 1); } void allow_pending_sigwinch(int allow) { sigset_t winch; sigemptyset(&winch); sigaddset(&winch, SIGWINCH); if (allow) sigprocmask(SIG_UNBLOCK, &winch, NULL); else sigprocmask(SIG_BLOCK, &winch, NULL); } #endif /* !NANO_SMALL */ #ifndef NANO_SMALL void do_toggle(const toggle *which) { int enabled; /* Even easier! */ TOGGLE(which->flag); switch (which->val) { case TOGGLE_SUSPEND_KEY: signal_init(); break; #ifndef DISABLE_MOUSE case TOGGLE_MOUSE_KEY: mouse_init(); break; #endif case TOGGLE_NOHELP_KEY: blank_statusbar(); blank_bottombars(); wrefresh(bottomwin); window_init(); edit_refresh(); display_main_list(); break; case TOGGLE_DOS_KEY: UNSET(MAC_FILE); break; case TOGGLE_MAC_KEY: UNSET(DOS_FILE); break; #ifdef ENABLE_COLOR case TOGGLE_SYNTAX_KEY: edit_refresh(); break; #endif } /* We are assuming here that shortcut_init() above didn't free and * reallocate the toggles. */ enabled = ISSET(which->flag); if (which->val == TOGGLE_NOHELP_KEY || which->val == TOGGLE_WRAP_KEY) enabled = !enabled; statusbar("%s %s", which->desc, enabled ? _("enabled") : _("disabled")); } #endif /* !NANO_SMALL */ #if !defined(NANO_SMALL) || defined(USE_SLANG) void disable_signals(void) { struct termios term; tcgetattr(0, &term); term.c_lflag &= ~ISIG; tcsetattr(0, TCSANOW, &term); } #endif #ifndef NANO_SMALL void enable_signals(void) { struct termios term; tcgetattr(0, &term); term.c_lflag |= ISIG; tcsetattr(0, TCSANOW, &term); } #endif void disable_flow_control(void) { struct termios term; tcgetattr(0, &term); term.c_iflag &= ~(IXON|IXOFF); tcsetattr(0, TCSANOW, &term); } void enable_flow_control(void) { struct termios term; tcgetattr(0, &term); term.c_iflag |= (IXON|IXOFF); tcsetattr(0, TCSANOW, &term); } int main(int argc, char *argv[]) { int optchr; int startline = 0; /* Line to try and start at */ int modify_control_seq = 0; int fill_flag_used = 0; /* Was the fill option used? */ const shortcut *s; int keyhandled = 0; /* Have we handled the keystroke yet? */ int kbinput; /* Input from keyboard */ int meta_key; #ifndef NANO_SMALL const toggle *t; #endif #ifdef HAVE_GETOPT_LONG const struct option long_options[] = { {"help", 0, 0, 'h'}, #ifdef ENABLE_MULTIBUFFER {"multibuffer", 0, 0, 'F'}, #endif #ifdef ENABLE_NANORC #ifndef NANO_SMALL {"historylog", 0, 0, 'H'}, #endif {"ignorercfiles", 0, 0, 'I'}, #endif #ifndef DISABLE_JUSTIFY {"quotestr", 1, 0, 'Q'}, #endif #ifdef HAVE_REGEX_H {"regexp", 0, 0, 'R'}, #endif {"tabsize", 1, 0, 'T'}, {"version", 0, 0, 'V'}, #ifdef ENABLE_COLOR {"syntax", 1, 0, 'Y'}, #endif {"const", 0, 0, 'c'}, {"rebinddelete", 0, 0, 'd'}, {"nofollow", 0, 0, 'l'}, #ifndef DISABLE_MOUSE {"mouse", 0, 0, 'm'}, #endif #ifndef DISABLE_OPERATINGDIR {"operatingdir", 1, 0, 'o'}, #endif {"preserve", 0, 0, 'p'}, #ifndef DISABLE_WRAPJUSTIFY {"fill", 1, 0, 'r'}, #endif #ifndef DISABLE_SPELLER {"speller", 1, 0, 's'}, #endif {"tempfile", 0, 0, 't'}, {"view", 0, 0, 'v'}, #ifndef DISABLE_WRAPPING {"nowrap", 0, 0, 'w'}, #endif {"nohelp", 0, 0, 'x'}, {"suspend", 0, 0, 'z'}, #ifndef NANO_SMALL {"backup", 0, 0, 'B'}, {"dos", 0, 0, 'D'}, {"backupdir", 1, 0, 'E'}, {"mac", 0, 0, 'M'}, {"noconvert", 0, 0, 'N'}, {"smooth", 0, 0, 'S'}, {"restricted", 0, 0, 'Z'}, {"autoindent", 0, 0, 'i'}, {"cut", 0, 0, 'k'}, #endif {0, 0, 0, 0} }; #endif #ifdef ENABLE_NLS setlocale(LC_ALL, ""); bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); #endif #if !defined(ENABLE_NANORC) && defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING) /* if we don't have rcfile support, we're root, and --disable-wrapping-as-root is used, turn wrapping off */ if (geteuid() == NANO_ROOT_UID) SET(NO_WRAP); #endif #ifdef HAVE_GETOPT_LONG while ((optchr = getopt_long(argc, argv, "h?BDE:FHIMNQ:RST:VY:Zabcdefgijklmo:pr:s:tvwxz", long_options, NULL)) != -1) { #else while ((optchr = getopt(argc, argv, "h?BDE:FHIMNQ:RST:VY:Zabcdefgijklmo:pr:s:tvwxz")) != -1) { #endif switch (optchr) { case 'a': case 'b': case 'e': case 'f': case 'g': case 'j': /* Pico compatibility flags */ break; #ifndef NANO_SMALL case 'B': SET(BACKUP_FILE); break; case 'D': SET(DOS_FILE); break; case 'E': backup_dir = mallocstrcpy(backup_dir, optarg); break; #endif #ifdef ENABLE_MULTIBUFFER case 'F': SET(MULTIBUFFER); break; #endif #ifdef ENABLE_NANORC #ifndef NANO_SMALL case 'H': SET(HISTORYLOG); break; #endif case 'I': SET(NO_RCFILE); break; #endif #ifndef NANO_SMALL case 'M': SET(MAC_FILE); break; case 'N': SET(NO_CONVERT); break; #endif #ifndef DISABLE_JUSTIFY case 'Q': quotestr = mallocstrcpy(quotestr, optarg); break; #endif #ifdef HAVE_REGEX_H case 'R': SET(USE_REGEXP); break; #endif #ifndef NANO_SMALL case 'S': SET(SMOOTHSCROLL); break; #endif case 'T': { int i; char *first_error; /* Using strtol() instead of atoi() lets us accept 0 * while checking other errors. */ i = (int)strtol(optarg, &first_error, 10); if (errno == ERANGE || *optarg == '\0' || *first_error != '\0') usage(); else tabsize = i; if (tabsize <= 0) { fprintf(stderr, _("Tab size is too small for nano...\n")); exit(1); } } break; case 'V': version(); exit(0); #ifdef ENABLE_COLOR case 'Y': syntaxstr = mallocstrcpy(syntaxstr, optarg); break; #endif case 'Z': SET(RESTRICTED); break; case 'c': SET(CONSTUPDATE); break; case 'd': SET(REBIND_DELETE); break; #ifndef NANO_SMALL case 'i': SET(AUTOINDENT); break; case 'k': SET(CUT_TO_END); break; #endif case 'l': SET(NOFOLLOW_SYMLINKS); break; #ifndef DISABLE_MOUSE case 'm': SET(USE_MOUSE); break; #endif #ifndef DISABLE_OPERATINGDIR case 'o': operating_dir = mallocstrcpy(operating_dir, optarg); break; #endif case 'p': SET(PRESERVE); break; #ifndef DISABLE_WRAPJUSTIFY case 'r': { int i; char *first_error; /* Using strtol() instead of atoi() lets us accept 0 * while checking other errors. */ i = (int)strtol(optarg, &first_error, 10); if (errno == ERANGE || *optarg == '\0' || *first_error != '\0') usage(); else wrap_at = i; } fill_flag_used = 1; break; #endif #ifndef DISABLE_SPELLER case 's': alt_speller = mallocstrcpy(alt_speller, optarg); break; #endif case 't': SET(TEMP_OPT); break; case 'v': SET(VIEW_MODE); break; #ifndef DISABLE_WRAPPING case 'w': SET(NO_WRAP); break; #endif case 'x': SET(NO_HELP); break; case 'z': SET(SUSPEND); break; default: usage(); } } /* If filename starts with 'r', we use restricted mode. */ if (*(tail(argv[0])) == 'r') SET(RESTRICTED); /* If we're using restricted mode, disable suspending, backup files, * and reading rcfiles. */ if (ISSET(RESTRICTED)) { UNSET(SUSPEND); UNSET(BACKUP_FILE); SET(NO_RCFILE); } /* We've read through the command line options. Now back up the flags and values that are set, and read the rcfile(s). If the values haven't changed afterward, restore the backed-up values. */ #ifdef ENABLE_NANORC if (!ISSET(NO_RCFILE)) { #ifndef DISABLE_OPERATINGDIR char *operating_dir_cpy = operating_dir; #endif #ifndef DISABLE_WRAPPING int wrap_at_cpy = wrap_at; #endif #ifndef NANO_SMALL char *backup_dir_cpy = backup_dir; #endif #ifndef DISABLE_JUSTIFY char *quotestr_cpy = quotestr; #endif #ifndef DISABLE_SPELLER char *alt_speller_cpy = alt_speller; #endif int tabsize_cpy = tabsize; long flags_cpy = flags; #ifndef DISABLE_OPERATINGDIR operating_dir = NULL; #endif #ifndef NANO_SMALL backup_dir = NULL; #endif #ifndef DISABLE_JUSTIFY quotestr = NULL; #endif #ifndef DISABLE_SPELLER alt_speller = NULL; #endif do_rcfile(); #ifndef DISABLE_OPERATINGDIR if (operating_dir_cpy != NULL) { free(operating_dir); operating_dir = operating_dir_cpy; } #endif #ifndef DISABLE_WRAPPING if (fill_flag_used) wrap_at = wrap_at_cpy; #endif #ifndef NANO_SMALL if (backup_dir_cpy != NULL) { free(backup_dir); backup_dir = backup_dir_cpy; } #endif #ifndef DISABLE_JUSTIFY if (quotestr_cpy != NULL) { free(quotestr); quotestr = quotestr_cpy; } #endif #ifndef DISABLE_SPELLER if (alt_speller_cpy != NULL) { free(alt_speller); alt_speller = alt_speller_cpy; } #endif if (tabsize_cpy > 0) tabsize = tabsize_cpy; flags |= flags_cpy; } #if defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING) else if (geteuid() == NANO_ROOT_UID) SET(NO_WRAP); #endif #endif /* ENABLE_NANORC */ #ifndef NANO_SMALL history_init(); #ifdef ENABLE_NANORC if (!ISSET(NO_RCFILE) && ISSET(HISTORYLOG)) load_history(); #endif #endif #ifndef NANO_SMALL /* Set up the backup directory. This entails making sure it exists * and is a directory, so that backup files will be saved there. */ init_backup_dir(); #endif #ifndef DISABLE_OPERATINGDIR /* Set up the operating directory. This entails chdir()ing there, so that file reads and writes will be based there. */ init_operating_dir(); #endif #ifndef DISABLE_JUSTIFY if (quotestr == NULL) #ifdef HAVE_REGEX_H quotestr = mallocstrcpy(NULL, "^([ \t]*[|>:}#])+"); #else quotestr = mallocstrcpy(NULL, "> "); #endif #endif /* !DISABLE_JUSTIFY */ if (tabsize == -1) tabsize = 8; /* Clear the filename we'll be using */ filename = charalloc(1); filename[0] = '\0'; /* If there's a +LINE flag, it is the first non-option argument. */ if (0 < optind && optind < argc && argv[optind][0] == '+') { startline = atoi(&argv[optind][1]); optind++; } if (0 < optind && optind < argc) filename = mallocstrcpy(filename, argv[optind]); /* See if there's a non-option in argv (first non-option is the filename, if +LINE is not given) */ if (argc > 1 && argc > optind) { /* Look for the +line flag... */ if (argv[optind][0] == '+') { startline = atoi(&argv[optind][1]); optind++; if (argc > optind) filename = mallocstrcpy(filename, argv[optind]); } else filename = mallocstrcpy(filename, argv[optind]); } /* Back up the old terminal settings so that they can be restored. */ tcgetattr(0, &oldterm); /* Curses initialization stuff: Start curses, save the state of the * terminal mode, put the terminal in raw mode (read one character at * a time and don't interpret the special control keys), disable * translation of carriage return (^M) into newline (^J) so that we * can tell the difference between the Enter key and ^J, and disable * echoing of characters as they're typed. Finally, if we're in * preserve mode, turn the flow control characters back on. */ initscr(); raw(); #ifdef USE_SLANG /* Slang curses emulation brain damage, part 2: Raw mode acts just * like cbreak mode here and doesn't disable interpretation of the * special control keys. Work around this by manually disabling * interpretation of the special control keys. */ disable_signals(); #endif nonl(); noecho(); if (ISSET(PRESERVE)) enable_flow_control(); #ifndef NANO_SMALL /* Save the terminal's current state, so that we can restore it * after a resize. */ savetty(); #endif /* Set up the global variables and the shortcuts. */ global_init(0); shortcut_init(0); /* Set up the signal handlers. */ signal_init(); #ifdef DEBUG fprintf(stderr, "Main: set up windows\n"); #endif window_init(); #ifndef DISABLE_MOUSE mouse_init(); #endif #ifdef DEBUG fprintf(stderr, "Main: bottom win\n"); #endif /* Set up bottom of window */ display_main_list(); #ifdef DEBUG fprintf(stderr, "Main: open file\n"); #endif open_file(filename, 0, 0); #ifdef ENABLE_MULTIBUFFER /* If we're using multibuffers and more than one file is specified on the command line, load them all and switch to the first one afterward */ if (optind + 1 < argc) { int old_multibuffer = ISSET(MULTIBUFFER); SET(MULTIBUFFER); for (optind++; optind < argc; optind++) { add_open_file(1); new_file(); filename = mallocstrcpy(filename, argv[optind]); open_file(filename, 0, 0); load_file(0); } open_nextfile_void(); if (!old_multibuffer) UNSET(MULTIBUFFER); } #endif titlebar(NULL); if (startline > 0) do_gotoline(startline, 0); #ifndef NANO_SMALL /* Return here after a SIGWINCH. */ sigsetjmp(jmpbuf, 1); #endif /* SHUT UP GCC! */ startline = 0; fill_flag_used = 0; keyhandled = 0; /* This variable should be initialized after the sigsetjmp(), so we can't do Esc-Esc then quickly resize and muck things up. */ modify_control_seq = 0; edit_refresh(); reset_cursor(); while (TRUE) { keyhandled = 0; if (ISSET(CONSTUPDATE)) do_cursorpos(1); #if !defined(DISABLE_BROWSER) || !defined(DISABLE_HELP) || !defined(DISABLE_MOUSE) currshortcut = main_list; #endif kbinput = get_kbinput(edit, &meta_key); #ifdef DEBUG fprintf(stderr, "AHA! %c (%d)\n", kbinput, kbinput); #endif if (meta_key == TRUE) { /* Check for the metaval and miscval defs... */ for (s = main_list; s != NULL; s = s->next) if ((s->metaval != NANO_NO_KEY && kbinput == s->metaval) || (s->miscval != NANO_NO_KEY && kbinput == s->miscval)) { if (ISSET(VIEW_MODE) && !s->viewok) print_view_warning(); else { if (s->func != do_cut_text) UNSET(KEEP_CUTBUFFER); s->func(); } keyhandled = 1; } #ifndef NANO_SMALL if (!keyhandled) /* And for toggle switches */ for (t = toggles; t != NULL; t = t->next) if (kbinput == t->val) { UNSET(KEEP_CUTBUFFER); do_toggle(t); keyhandled = 1; } #endif #ifdef DEBUG fprintf(stderr, "I got Alt-%c! (%d)\n", kbinput, kbinput); #endif } /* Look through the main shortcut list to see if we've hit a shortcut key or function key */ if (!keyhandled) #if !defined(DISABLE_BROWSER) || !defined (DISABLE_HELP) || !defined(DISABLE_MOUSE) for (s = currshortcut; s != NULL && !keyhandled; s = s->next) { #else for (s = main_list; s != NULL && !keyhandled; s = s->next) { #endif if ((s->ctrlval != NANO_NO_KEY && kbinput == s->ctrlval) || (s->funcval != NANO_NO_KEY && kbinput == s->funcval)) { if (ISSET(VIEW_MODE) && !s->viewok) print_view_warning(); else { if (s->func != do_cut_text) UNSET(KEEP_CUTBUFFER); s->func(); } keyhandled = 1; /* Break out explicitly once we successfully handle a shortcut */ break; } } if (!keyhandled) UNSET(KEEP_CUTBUFFER); /* Don't even think about changing this string */ if (kbinput == NANO_CONTROL_Q) statusbar(_("XON ignored, mumble mumble.")); if (kbinput == NANO_CONTROL_S) statusbar(_("XOFF ignored, mumble mumble.")); /* If we're in raw mode or using Alt-Alt-x, we have to catch Control-S and Control-Q */ if (kbinput == NANO_CONTROL_Q || kbinput == NANO_CONTROL_S) keyhandled = 1; /* Catch ^Z by hand when triggered also */ if (kbinput == NANO_SUSPEND_KEY) { if (ISSET(SUSPEND)) do_suspend(0); keyhandled = 1; } /* Last gasp, stuff that's not in the main lists */ if (!keyhandled) switch (kbinput) { #ifndef DISABLE_MOUSE case KEY_MOUSE: do_mouse(); break; #endif case NANO_CONTROL_3: /* Ctrl-[ (Esc), which should * have been handled before we * got here */ case NANO_CONTROL_5: /* Ctrl-] */ break; default: #ifdef DEBUG fprintf(stderr, "I got %c (%d)!\n", kbinput, kbinput); #endif /* We no longer stop unhandled sequences so that people with odd character sets can type... */ if (ISSET(VIEW_MODE)) print_view_warning(); else do_char(kbinput); } reset_cursor(); wrefresh(edit); } assert(FALSE); }