| /* $Id$ */ |
| /************************************************************************** |
| * 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 <stdio.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <signal.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <sys/stat.h> |
| #include <sys/ioctl.h> |
| #include <sys/param.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <errno.h> |
| #include <ctype.h> |
| #include <locale.h> |
| #include <limits.h> |
| #include <assert.h> |
| #include "proto.h" |
| #include "nano.h" |
| |
| #ifdef HAVE_TERMIOS_H |
| #include <termios.h> |
| #endif |
| |
| #ifdef HAVE_TERMIO_H |
| #include <termio.h> |
| #endif |
| |
| #ifdef HAVE_GETOPT_H |
| #include <getopt.h> |
| #endif |
| |
| #ifndef NANO_SMALL |
| #include <setjmp.h> |
| #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. */ |
| void finish(void) |
| { |
| 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(0); |
| } |
| |
| /* 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, TRUE, FALSE, TRUE); |
| |
| 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("-A", "--smarthome", _("Enable smart home key")); |
| 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 interpretation of the special control keys so that we get |
| * SIGINT when Ctrl-C is pressed. */ |
| 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 interpretation of the special control keys so that we can |
| * use Ctrl-C for other things. */ |
| 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 do_refresh = FALSE; |
| /* Do we have to call 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(FALSE); |
| |
| #ifndef DISABLE_WRAPPING |
| /* If we're wrapping text, we need to call edit_refresh(). */ |
| if (!ISSET(NO_WRAP) && ch != '\t') |
| do_refresh = do_wrap(current); |
| #endif |
| |
| #ifdef ENABLE_COLOR |
| /* If color syntaxes are turned on, we need to call |
| * edit_refresh(). */ |
| if (ISSET(COLOR_SYNTAX)) |
| do_refresh = TRUE; |
| #endif |
| |
| #if !defined(DISABLE_WRAPPING) || defined(ENABLE_COLOR) |
| if (do_refresh) |
| edit_refresh(); |
| else |
| #endif |
| update_line(current, current_x); |
| } |
| |
| int do_verbatim_input(void) |
| { |
| int *v_kbinput = NULL; /* Used to hold verbatim input. */ |
| size_t v_len; /* Length of verbatim input. */ |
| size_t i; |
| |
| statusbar(_("Verbatim input")); |
| |
| v_kbinput = get_verbatim_kbinput(edit, v_kbinput, &v_len, TRUE); |
| |
| /* 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 < v_len; i++) |
| do_char((char)v_kbinput[i]); |
| UNSET(DISABLE_CURPOS); |
| |
| free(v_kbinput); |
| |
| return 1; |
| } |
| |
| int do_backspace(void) |
| { |
| if (current != fileage || current_x > 0) { |
| do_left(FALSE); |
| do_delete(); |
| } |
| return 1; |
| } |
| |
| int do_delete(void) |
| { |
| int do_refresh = FALSE; |
| /* Do we have to call edit_refresh(), or can we get away with |
| * update_line()? */ |
| |
| 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 magicline then. */ |
| filestruct *foo = current->next; |
| |
| assert(current_x == strlen(current->data)); |
| |
| /* If we're deleting at the end of a line, we need to call |
| * edit_refresh(). */ |
| if (current->data[current_x] == '\0') |
| do_refresh = TRUE; |
| |
| 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(); |
| |
| #ifdef ENABLE_COLOR |
| /* If color syntaxes are turned on, we need to call |
| * edit_refresh(). */ |
| if (ISSET(COLOR_SYNTAX)) |
| do_refresh = TRUE; |
| #endif |
| |
| if (do_refresh) |
| edit_refresh(); |
| else |
| update_line(current, current_x); |
| |
| return 1; |
| } |
| |
| int do_tab(void) |
| { |
| do_char('\t'); |
| return 1; |
| } |
| |
| /* Someone hits return *gasp!* */ |
| int do_enter(void) |
| { |
| filestruct *newnode = make_new_node(current); |
| size_t extra = 0; |
| |
| assert(current != NULL && current->data != NULL); |
| |
| #ifndef NANO_SMALL |
| /* Do auto-indenting, like the neolithic Turbo Pascal editor. */ |
| if (ISSET(AUTOINDENT)) { |
| /* If we are breaking the line in the indentation, the new |
| * indentation should have only current_x characters, and |
| * current_x should not change. */ |
| extra = indent_length(current->data); |
| if (extra > current_x) |
| extra = current_x; |
| totsize += extra; |
| } |
| #endif |
| newnode->data = charalloc(strlen(current->data + current_x) + |
| extra + 1); |
| strcpy(&newnode->data[extra], current->data + current_x); |
| #ifndef NANO_SMALL |
| if (ISSET(AUTOINDENT)) |
| strncpy(newnode->data, current->data, extra); |
| #endif |
| null_at(¤t->data, current_x); |
| #ifndef NANO_SMALL |
| if (current == mark_beginbuf && current_x < mark_beginx) { |
| mark_beginbuf = newnode; |
| mark_beginx += extra - current_x; |
| } |
| #endif |
| current_x = extra; |
| |
| if (current == filebot) |
| filebot = newnode; |
| splice_node(current, newnode, current->next); |
| |
| totsize++; |
| renumber(current); |
| current = newnode; |
| |
| #ifndef NANO_SMALL |
| /* If we're in smooth scrolling mode and we're on the last line of |
| * the edit window, move edittop down one line so that current is |
| * onscreen. This prevents edit_refresh() from centering the |
| * screen. */ |
| if (ISSET(SMOOTHSCROLL) && current_y == editwinrows - 1) |
| edittop = edittop->next; |
| #endif |
| edit_refresh(); |
| |
| totlines++; |
| set_modified(); |
| placewewant = xplustabs(); |
| |
| return 1; |
| } |
| |
| #ifndef NANO_SMALL |
| int do_next_word(void) |
| { |
| const filestruct *current_save = current; |
| 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_redraw(current_save); |
| |
| return 0; |
| } |
| |
| /* The same thing for backwards. */ |
| int do_prev_word(void) |
| { |
| const filestruct *current_save = current; |
| 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) { |
| current = fileage; |
| current_x = 0; |
| } else { |
| while (current_x > 0 && isalnum((int)current->data[current_x - 1])) |
| current_x--; |
| } |
| |
| placewewant = xplustabs(); |
| |
| /* Refresh the screen. If current has run off the top, this call |
| * puts it at the center line. */ |
| edit_redraw(current_save); |
| |
| 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; |
| size_t current_x_save = current_x; |
| filestruct *current_save = current; |
| 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. */ |
| const 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. */ |
| const 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 = safe_tempnam(0, "nano."); |
| const char *spell_msg; |
| |
| if (temp == NULL) { |
| statusbar(_("Could not create temp file: %s"), strerror(errno)); |
| return 0; |
| } |
| |
| #ifndef NANO_SMALL |
| if (ISSET(MARK_ISSET)) |
| i = write_marked(temp, TRUE, FALSE); |
| else |
| #endif |
| i = write_file(temp, TRUE, FALSE, FALSE); |
| |
| if (i == -1) { |
| statusbar(_("Unable to write temp file: %s"), strerror(errno)); |
| 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 |
| |
| spell_msg = alt_speller != NULL ? do_alt_speller(temp) : |
| do_int_speller(temp); |
| unlink(temp); |
| free(temp); |
| |
| if (spell_msg != NULL) { |
| statusbar(_("Spell checking failed: %s: %s"), spell_msg, |
| strerror(errno)); |
| return 0; |
| } else |
| 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 JUSTIFY, 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 BEGIN, search for |
| * the beginning of the current paragraph or, if we're already there, |
| * the beginning of the previous paragraph. If search_type is END, |
| * 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 |
| * TRUE. 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(justbegend search_type, size_t *quote, size_t *par, |
| size_t *indent, int do_refresh) |
| { |
| const filestruct *current_save = current; |
| size_t quote_len; |
| /* Length of the initial quotation of the paragraph we |
| * search. */ |
| size_t par_len; |
| /* Number of lines in that paragraph. */ |
| 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 == BEGIN) { |
| /* 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_redraw(current_save); |
| #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_redraw(current_save); |
| #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 == BEGIN) { |
| /* 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 == END) { |
| for (; par_len > 0; current_y++, par_len--) |
| current = current->next; |
| } |
| |
| /* Refresh the screen if needed. */ |
| if (do_refresh) |
| edit_redraw(current_save); |
| |
| /* 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(BEGIN, NULL, NULL, NULL, TRUE); |
| } |
| |
| int do_para_end(void) |
| { |
| return do_para_search(END, 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; |
| int flags_save = flags; |
| long totsize_save = totsize; |
| filestruct *current_save = current; |
| 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(JUSTIFY, "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 = quote_len + indent_length(current->data + |
| 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 or left out 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(); |
| 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; |
| |
| 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); |
| edit_refresh(); |
| } |
| cutbuffer = cutbuffer_save; |
| /* Note that now cutbottom is invalid, but that's okay. */ |
| blank_statusbar(); |
| /* 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(); |
| } |
| |
| 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(); |
| } |
| } else if (i == 0) { |
| |
| #ifdef ENABLE_MULTIBUFFER |
| if (!close_open_file()) { |
| display_main_list(); |
| return 1; |
| } |
| else |
| #endif |
| finish(); |
| } 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(); |
| |
| /* Reset all the input routines that rely on character sequences. */ |
| reset_kbinput(); |
| |
| /* 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 */ |
| |
| void disable_signals(void) |
| { |
| struct termios term; |
| |
| tcgetattr(0, &term); |
| term.c_lflag &= ~ISIG; |
| tcsetattr(0, TCSANOW, &term); |
| } |
| |
| #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 |
| {"smarthome", 0, 0, 'A'}, |
| {"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?ABDE:FHIMNQ:RST:VY:Zabcdefgijklmo:pr:s:tvwxz", |
| long_options, NULL)) != -1) { |
| #else |
| while ((optchr = |
| getopt(argc, argv, "h?ABDE: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 'A': |
| SET(SMART_HOME); |
| break; |
| 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 */ |
| |
| #ifndef DISABLE_SPELLER |
| /* If we don't have an alternative spell checker after reading the |
| * command line and/or rcfile, check $SPELL for one, as Pico |
| * does. */ |
| if (alt_speller == NULL) { |
| char *spellenv = getenv("SPELL"); |
| if (spellenv != NULL) |
| alt_speller = mallocstrcpy(NULL, spellenv); |
| } |
| #endif |
| |
| 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 cbreak mode (read one character |
| * at a time and 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 Ctrl-J, and |
| * disable echoing of characters as they're typed. Finally, disable |
| * interpretation of the special control keys, and if we're not in |
| * preserve mode, disable interpretation of the flow control |
| * characters too. */ |
| initscr(); |
| cbreak(); |
| nonl(); |
| noecho(); |
| disable_signals(); |
| if (!ISSET(PRESERVE)) |
| disable_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((char)kbinput); |
| } |
| |
| reset_cursor(); |
| wrefresh(edit); |
| } |
| assert(FALSE); |
| } |