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- /* vcmd.c */
-
- /* Author:
- * Steve Kirkendall
- * 16820 SW Tallac Way
- * Beaverton, OR 97006
- * kirkenda@jove.cs.pdx.edu, or ...uunet!tektronix!psueea!jove!kirkenda
- */
-
-
- /* This file contains the functions that handle VI commands */
-
-
- #include "config.h"
- #include "vi.h"
- #if MSDOS
- #include <process.h>
- #include <string.h>
- #endif
- #if TOS
- #include <osbind.h>
- #include <string.h>
- #endif
-
-
- /* This function puts the editor in EX mode */
- MARK v_quit()
- {
- mode = MODE_EX;
- return cursor;
- }
-
- /* This function causes the screen to be redrawn */
- MARK v_redraw()
- {
- redraw(MARK_UNSET, FALSE);
- return cursor;
- }
-
- /* This function executes a single EX command, and waits for a user keystroke
- * before returning to the VI screen. If that keystroke is another ':', then
- * another EX command is read and executed.
- */
- /*ARGSUSED*/
- MARK v_1ex(m, text)
- MARK m; /* the current line */
- char *text; /* the first command to execute */
- {
- /* scroll up, so we don't overwrite the command */
- if (mode == MODE_COLON)
- {
- addch('\n');
- refresh();
- }
-
- /* run the command. be careful about modes & output */
- exwrote = (mode == MODE_COLON);
- doexcmd(text);
- exrefresh();
-
- /* if mode is no longer MODE_VI, then we should quit right away! */
- if (mode != MODE_VI && mode != MODE_COLON)
- return cursor;
-
- /* The command did some output. Wait for a keystoke. */
- if (exwrote)
- {
- mode = MODE_VI;
- msg("[Hit any key to continue]");
- if (getkey(0) == ':')
- { mode = MODE_COLON;
- addch('\n');
- }
- else
- redraw(MARK_UNSET, FALSE);
- }
-
- return cursor;
- }
-
- /* This function undoes the last change */
- /*ARGSUSED*/
- MARK v_undo(m)
- MARK m; /* (ignored) */
- {
- undo();
- redraw(MARK_UNSET, FALSE);
- return cursor;
- }
-
- /* This function deletes the character(s) that the cursor is on */
- MARK v_xchar(m, cnt)
- MARK m; /* where to start deletions */
- long cnt; /* number of chars to delete */
- {
- DEFAULT(1);
-
- pfetch(markline(m));
- if (markidx(m + cnt) > plen)
- {
- cnt = plen - markidx(m);
- }
- if (cnt == 0L)
- {
- return MARK_UNSET;
- }
- ChangeText
- {
- cut(m, m + cnt);
- delete(m, m + cnt);
- }
- return m;
- }
-
- /* This function deletes character to the left of the cursor */
- MARK v_Xchar(m, cnt)
- MARK m; /* where deletions end */
- long cnt; /* number of chars to delete */
- {
- DEFAULT(1);
-
- /* if we're at the first char of the line, error! */
- if (markidx(m) == 0)
- {
- return MARK_UNSET;
- }
-
- /* make sure we don't try to delete more chars than there are */
- if (cnt > markidx(m))
- {
- cnt = markidx(m);
- }
-
- /* delete 'em */
- ChangeText
- {
- cut(m - cnt, m);
- delete(m - cnt, m);
- }
-
- return m - cnt;
- }
-
- /* This function defines a mark */
- /*ARGSUSED*/
- MARK v_mark(m, count, key)
- MARK m; /* where the mark will be */
- long count; /* (ignored) */
- int key; /* the ASCII label of the mark */
- {
- if (key < 'a' || key > 'z')
- {
- msg("Marks must be from a to z");
- }
- else
- {
- mark[key - 'a'] = m;
- }
- return m;
- }
-
- /* This function toggles upper & lower case letters */
- MARK v_ulcase(m)
- MARK m; /* where to make the change */
- {
- char new[2];
- #if MSDOS || TOS
- char *pos;
- char *lower="\207\201\202\204\206\221\224\244";
- char *upper="\200\232\220\216\217\222\231\245";
- #endif
-
- /* extract the char that's there now */
- pfetch(markline(m));
- new[0] = ptext[markidx(m)];
- new[1] = '\0';
-
- /* change it if necessary */
- if (new[0] >= 'a' && new[0] <= 'z' || new[0] >= 'A' && new[0] <= 'Z')
- {
- new[0] ^= ('A' ^ 'a');
- ChangeText
- {
- change(m, m + 1, new);
- }
- }
- #if MSDOS || TOS
- if ((pos=strchr(lower, new[0]))!=0)
- new[0]=upper[(int)(pos-lower)];
- else if ((pos=strchr(upper, new[0]))!=0)
- new[0]=lower[(int)(pos-upper)];
- else
- goto nochange; /* Urghh - GB */
- ChangeText
- {
- change(m, m + 1, new);
- }
- nochange:
- #endif
- if (new[0] && ptext[markidx(m) + 1])
- {
- m++;
- }
- return m;
- }
-
-
- MARK v_replace(m, cnt, key)
- MARK m; /* first char to be replaced */
- long cnt; /* number of chars to replace */
- int key; /* what to replace them with */
- {
- register char *text;
- register int i;
- static int samekey;
-
- DEFAULT(1);
-
- /* map ^M to '\n' */
- if (key == '\r')
- {
- key = '\n';
- }
- else if (key == ctrl('V'))
- {
- if (doingdot)
- key = samekey;
- else
- key = samekey = getkey(0);
- if (key == 0)
- return MARK_UNSET;
- }
- else if (!doingdot && key == ctrl('['))
- {
- samekey = 0;
- return MARK_UNSET;
- }
-
- /* make sure the resulting line isn't too long */
- if (cnt > BLKSIZE - 2 - markidx(m))
- {
- cnt = BLKSIZE - 2 - markidx(m);
- }
-
- /* build a string of the desired character with the desired length */
- for (text = tmpblk.c, i = cnt; i > 0; i--)
- {
- *text++ = key;
- }
- *text = '\0';
-
- /* make sure cnt doesn't extend past EOL */
- pfetch(markline(m));
- key = markidx(m);
- if (key + cnt > plen)
- {
- cnt = plen - key;
- }
-
- /* do the replacement */
- ChangeText
- {
- change(m, m + cnt, tmpblk.c);
- }
-
- if (*tmpblk.c == '\n')
- {
- return (m & ~(BLKSIZE - 1)) + cnt * BLKSIZE;
- }
- else
- {
- return m + cnt - 1;
- }
- }
-
- MARK v_overtype(m)
- MARK m; /* where to start overtyping */
- {
- MARK end; /* end of a substitution */
- static long width; /* width of a single-line replace */
-
- /* the "doingdot" version of replace is really a substitution */
- if (doingdot)
- {
- /* was the last one really repeatable? */
- if (width < 0)
- {
- msg("Can't repeat a multi-line overtype command");
- return MARK_UNSET;
- }
-
- /* replacing nothing by nothing? Don't bother */
- if (width == 0)
- {
- return m;
- }
-
- /* replace some chars by repeated text */
- return v_subst(m, width);
- }
-
- /* Normally, we input starting here, in replace mode */
- ChangeText
- {
- end = input(m, m, WHEN_VIREP);
- }
-
- /* if we ended on the same line we started on, then this
- * overtype is repeatable via the dot key.
- */
- if (markline(end) == markline(m) && end >= m - 1L)
- {
- width = end - m + 1L;
- }
- else /* it isn't repeatable */
- {
- width = -1L;
- }
-
- return end;
- }
-
-
- /* This function selects which cut buffer to use */
- /*ARGSUSED*/
- MARK v_selcut(m, cnt, key)
- MARK m;
- long cnt;
- int key;
- {
- cutname(key);
- return m;
- }
-
- /* This function pastes text from a cut buffer */
- /*ARGSUSED*/
- MARK v_paste(m, cnt, cmd)
- MARK m; /* where to paste the text */
- long cnt; /* (ignored) */
- int cmd; /* either 'p' or 'P' */
- {
- ChangeText
- {
- m = paste(m, cmd == 'p', FALSE);
- }
- return m;
- }
-
- /* This function yanks text into a cut buffer */
- MARK v_yank(m, n)
- MARK m, n; /* range of text to yank */
- {
- cut(m, n);
- return m;
- }
-
- /* This function deletes a range of text */
- MARK v_delete(m, n)
- MARK m, n; /* range of text to delete */
- {
- /* illegal to try and delete nothing */
- if (n <= m)
- {
- return MARK_UNSET;
- }
- /* Do it */
- ChangeText
- {
- cut(m, n);
- delete(m, n);
- }
- return m;
- }
-
-
- /* This starts input mode without deleting anything */
- MARK v_insert(m, cnt, key)
- MARK m; /* where to start (sort of) */
- long cnt; /* repeat how many times? */
- int key; /* what command is this for? {a,A,i,I,o,O} */
- {
- int wasdot;
- long reps;
-
- DEFAULT(1);
-
- ChangeText
- {
- /* tweak the insertion point, based on command key */
- switch (key)
- {
- case 'i':
- break;
-
- case 'a':
- pfetch(markline(m));
- if (plen > 0)
- {
- m++;
- }
- break;
-
- case 'I':
- m = m_front(m, 1L);
- break;
-
- case 'A':
- pfetch(markline(m));
- m = (m & ~(BLKSIZE - 1)) + plen;
- break;
-
- case 'O':
- m &= ~(BLKSIZE - 1);
- add(m, "\n");
- break;
-
- case 'o':
- m = (m & ~(BLKSIZE - 1)) + BLKSIZE;
- add(m, "\n");
- break;
- }
-
- /* insert the same text once or more */
- for (reps = cnt, wasdot = doingdot; reps > 0; reps--, doingdot = TRUE)
- {
- m = input(m, m, WHEN_VIINP);
- }
-
- /* compensate for inaccurate redraw clues from input() */
- if ((key == 'O' || key == 'o') && wasdot)
- {
- redraw(MARK_UNSET);
- }
-
- doingdot = FALSE;
- }
-
- return m;
- }
-
- /* This starts input mode with some text deleted */
- MARK v_change(m, n)
- MARK m, n; /* the range of text to change */
- {
- int lnmode; /* is this a line-mode change? */
-
- /* swap them if they're in reverse order */
- if (m > n)
- {
- MARK tmp;
- tmp = m;
- m = n;
- n = tmp;
- }
-
- /* for line mode, retain the last newline char */
- lnmode = (markidx(m) == 0 && markidx(n) == 0 && m != n);
- if (lnmode)
- {
- n -= BLKSIZE;
- pfetch(markline(n));
- n = (n & ~(BLKSIZE - 1)) + plen;
- }
-
- ChangeText
- {
- cut(m, n);
- m = input(m, n, WHEN_VIINP);
- }
-
- /* compensate for inaccurate redraw clues from paste() */
- if (doingdot)
- {
- preredraw = markline(n);
- if (lnmode)
- {
- preredraw++;
- postredraw++;
- }
- }
-
- return m;
- }
-
- /* This function replaces a given number of characters with input */
- MARK v_subst(m, cnt)
- MARK m; /* where substitutions start */
- long cnt; /* number of chars to replace */
- {
- DEFAULT(1);
-
- /* make sure we don't try replacing past EOL */
- pfetch(markline(m));
- if (markidx(m) + cnt > plen)
- {
- cnt = plen - markidx(m);
- }
-
- /* Go for it! */
- ChangeText
- {
- cut(m, m + cnt);
- m = input(m, m + cnt, WHEN_VIINP);
- }
- return m;
- }
-
- /* This calls the ex "join" command to join some lines together */
- MARK v_join(m, cnt)
- MARK m; /* the first line to be joined */
- long cnt; /* number of other lines to join */
- {
- MARK joint; /* where the lines were joined */
-
- DEFAULT(1);
-
- /* figure out where the joint will be */
- pfetch(markline(m));
- joint = (m & ~(BLKSIZE - 1)) + plen;
-
- /* join the lines */
- cmd_join(m, m + MARK_AT_LINE(cnt), CMD_JOIN, 0, "");
- mustredraw = TRUE;
-
- /* the cursor should be left at the joint */
- return joint;
- }
-
- /* This calls the ex shifter command to shift some lines */
- static MARK shift_help(m, n, excmd)
- MARK m, n; /* range of lines to shift */
- CMD excmd; /* which way do we shift? */
- {
- /* make sure our endpoints aren't in reverse order */
- if (m > n)
- {
- MARK tmp;
-
- tmp = n;
- n = m;
- m = tmp;
- }
-
- /* linemode? adjust for inclusive endmarks in ex */
- if (markidx(m) == 0 && markidx(n) == 0)
- {
- n -= BLKSIZE;
- }
-
- cmd_shift(m, n, excmd, 0, "");
- return m;
- }
-
- /* This calls the ex "<" command to shift some lines left */
- MARK v_lshift(m, n)
- MARK m, n; /* range of lines to shift */
- {
- return shift_help(m, n, CMD_SHIFTL);
- }
-
- /* This calls the ex ">" command to shift some lines right */
- MARK v_rshift(m, n)
- MARK m, n; /* range of lines to shift */
- {
- return shift_help(m, n, CMD_SHIFTR);
- }
-
- /* This runs some lines through a filter program */
- MARK v_filter(m, n)
- MARK m, n; /* range of lines to shift */
- {
- char cmdln[100]; /* a shell command line */
-
- /* linemode? adjust for inclusive endmarks in ex */
- if (markidx(m) == 0 && markidx(n) == 0)
- {
- n -= BLKSIZE;
- }
-
- if (vgets('!', cmdln, sizeof(cmdln)) > 0)
- {
- filter(m, n, cmdln);
- }
-
- redraw(MARK_UNSET, FALSE);
- return m;
- }
-
-
- /* This function runs the ex "file" command to show the file's status */
- MARK v_status()
- {
- cmd_file(cursor, cursor, CMD_FILE, 0, "");
- return cursor;
- }
-
- /* This function switches to the previous file, if possible */
- MARK v_switch()
- {
- if (!*prevorig)
- msg("No previous file");
- else
- { strcpy(tmpblk.c, prevorig);
- cmd_edit(cursor, cursor, CMD_EDIT, 0, tmpblk.c);
- }
- return cursor;
- }
-
- /* This function does a tag search on a keyword */
- /*ARGSUSED*/
- MARK v_tag(keyword, m, cnt)
- char *keyword;
- MARK m;
- long cnt;
- {
- /* remember the initial change level */
- cnt = changes;
-
- /* move the cursor to the start of the tag name, where m is */
- cursor = m;
-
- /* perform the tag search */
- cmd_tag(cursor, cursor, CMD_TAG, 0, keyword);
-
- return cursor;
- }
-
- #ifndef NO_EXTENSIONS
- /* This function looks up a keyword by calling the helpprog program */
- /*ARGSUSED*/
- MARK v_keyword(keyword, m, cnt)
- char *keyword;
- MARK m;
- long cnt;
- {
- int status;
- #if TOS
- char cmdline[130];
- #endif
-
- move(LINES - 1, 0);
- addstr("---------------------------------------------------------\n");
- clrtoeol();
- refresh();
- suspend_curses();
-
- #if ANY_UNIX
-
- switch (fork())
- {
- case -1: /* error */
- break;
-
- case 0: /* child */
- execl(o_keywordprg, o_keywordprg, keyword, (char *)0);
- exit(2); /* if we get here, the exec failed */
-
- default: /* parent */
- wait(&status);
- if (status > 0)
- {
- write(2, "<<< failed >>>\n", 15);
- }
- }
-
- #endif
- #if MSDOS
- if ((status=spawnlp(P_WAIT, o_keywordprg, o_keywordprg, keyword,
- (char *)0))==-1)
- write(2, "<<< failed >>>\n", 15);
- #endif
- #if TOS
- strcpy(cmdline+1, keyword);
- cmdline[0]=strlen(keyword);
- if ((status=Pexec(0, o_keywordprg, cmdline, "\0"))<0)
- write(2, "<<< failed >>>\n", 15);
- #endif
-
- resume_curses(FALSE); /* "resume, but not quietly" */
- redraw(MARK_UNSET, FALSE);
- return m;
- }
-
-
-
- MARK v_increment(keyword, m, cnt)
- char *keyword;
- MARK m;
- long cnt;
- {
- static sign;
- char newval[12];
- long atol();
-
- DEFAULT(1);
-
- /* get one more keystroke, unless doingdot */
- if (!doingdot)
- {
- sign = getkey(0);
- }
-
- /* adjust the number, based on that second keystroke */
- switch (sign)
- {
- case '+':
- case '#':
- cnt = atol(keyword) + cnt;
- break;
-
- case '-':
- cnt = atol(keyword) - cnt;
- break;
-
- case '=':
- break;
-
- default:
- return MARK_UNSET;
- }
- sprintf(newval, "%ld", cnt);
-
- ChangeText
- {
- change(m, m + strlen(keyword), newval);
- }
-
- return m;
- }
- #endif
-
-
- /* This function acts like the EX command "xit" */
- /*ARGSUSED*/
- MARK v_xit(m, cnt, key)
- MARK m; /* ignored */
- long cnt; /* ignored */
- int key; /* must be a second 'Z' */
- {
- /* if second char wasn't 'Z', fail */
- if (key != 'Z')
- {
- return MARK_UNSET;
- }
-
- /* move the physical cursor to the end of the screen */
- move(LINES - 1, 0);
- clrtoeol();
- refresh();
-
- /* do the xit command */
- cmd_xit(m, m, CMD_XIT, FALSE, "");
-
- /* if we're really going to quit, then scroll the screen up 1 line */
- if (mode == MODE_QUIT)
- {
- addch('\n');
- refresh();
- }
-
- /* regardless of whether we succeeded or failed, return the cursor */
- return m;
- }
-
-
- /* This function undoes changes to a single line, if possible */
- MARK v_undoline(m)
- MARK m; /* where we hope to undo the change */
- {
- if (markline(m) != U_line)
- {
- return MARK_UNSET;
- }
-
- ChangeText
- {
- changeline(U_line, U_text);
- }
- return m & ~(BLKSIZE - 1);
- }
-