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Diffstat (limited to 'ex_vis.h')
| -rw-r--r-- | ex_vis.h | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/ex_vis.h b/ex_vis.h new file mode 100644 index 0000000..8bdd00e --- /dev/null +++ b/ex_vis.h @@ -0,0 +1,329 @@ +/* + * This code contains changes by + * Gunnar Ritter, Freiburg i. Br., Germany, 2002. All rights reserved. + * + * Conditions 1, 2, and 4 and the no-warranty notice below apply + * to these changes. + * + * + * Copyright (c) 1980, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * + * Copyright(C) Caldera International Inc. 2001-2002. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * Redistributions of source code and documentation must retain the + * above copyright notice, this list of conditions and the following + * disclaimer. + * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed or owned by Caldera + * International, Inc. + * Neither the name of Caldera International, Inc. nor the names of + * other contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA + * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE + * LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * from ex_vis.h 7.4 (Berkeley) 5/31/85 + * + * Sccsid @(#)ex_vis.h 1.22 (gritter) 8/6/05 + */ + +/* + * Ex version 3 + * Mark Horton, UCB + * Bill Joy UCB + * + * Open and visual mode definitions. + * + * There are actually 4 major states in open/visual modes. These + * are visual, crt open (where the cursor can move about the screen and + * the screen can scroll and be erased), one line open (on dumb glass-crt's + * like the adm3), and hardcopy open (for everything else). + * + * The basic state is given by bastate, and the current state by state, + * since we can be in pseudo-hardcopy mode if we are on an adm3 and the + * line is longer than 80. + */ + +var enum { + VISUAL = 0, + CRTOPEN = 1, + ONEOPEN = 2, + HARDOPEN = 3 +} bastate, state; + +/* + * Maximum screen size in visual mode, dynamically set as needed. + */ +var short TUBELINES; +var short TUBECOLS; +var int TUBESIZE; + +/* + * The screen in visual and crtopen is of varying size; the basic + * window has top basWTOP and basWLINES lines are thereby implied. + * The current window (which may have grown from the basic size) + * has top WTOP and WLINES lines. The top line of the window is WTOP, + * and the bottom line WBOT. The line WECHO is used for messages, + * search strings and the like. If WBOT==WECHO then we are in ONEOPEN + * or HARDOPEN and there is no way back to the line we were on if we + * go to WECHO (i.e. we will have to scroll before we go there, and + * we can't get back). There are WCOLS columns per line. + * If WBOT!=WECHO then WECHO will be the last line on the screen + * and WBOT is the line before it. + */ +var short basWTOP; +var short basWLINES; +var short WTOP; +var short WBOT; +var short WLINES; +var short WCOLS; +var short WECHO; + +/* + * When we are dealing with the echo area we consider the window + * to be "split" and set the variable splitw. Otherwise, moving + * off the bottom of the screen into WECHO causes a screen rollup. + */ +var bool splitw; + +/* + * Information about each line currently on the screen includes + * the y coordinate associated with the line, the printing depth + * of the line (0 indicates unknown), and a mask which indicates + * whether the line is "unclean", i.e. whether we should check + * to make sure the line is displayed correctly at the next + * appropriate juncture. + */ +struct vlinfo { + short vliny; /* Y coordinate */ /* mjm: was char */ + short vdepth; /* Depth of displayed line */ /*mjm: was char */ + short vflags; /* Is line potentially dirty ? */ +}; +var struct vlinfo *vlinfo; + +#define DEPTH(c) (vlinfo[c].vdepth) +#define LINE(c) (vlinfo[c].vliny) +#define FLAGS(c) (vlinfo[c].vflags) + +#define VDIRT 1 +#define VLONG 2 /* Line does not fit on a single screen */ + +/* + * Hacks to copy vlinfo structures around + */ +# define vlcopy(i, j) i = j; + +/* + * The current line on the screen is represented by vcline. + * There are vcnt lines on the screen, the last being "vcnt - 1". + * Vcline is intimately tied to the current value of dot, + * and when command mode is used as a subroutine fancy footwork occurs. + */ +var short vcline; +var short vcnt; + +/* + * To allow many optimizations on output, an exact image of the terminal + * screen is maintained in the space addressed by vtube0. The vtube + * array indexes this space as lines, and is shuffled on scrolls, insert+delete + * lines and the like rather than (more expensively) shuffling the screen + * data itself. It is also rearranged during insert mode across line + * boundaries to make incore work easier. + */ +var cell **vtube; +var cell *vtube0; + +/* + * The current cursor position within the current line is kept in + * cursor. The current line is kept in linebuf. During insertions + * we use the auxiliary array genbuf as scratch area. + * The cursor wcursor and wdot are used in operations within/spanning + * lines to mark the other end of the affected area, or the target + * for a motion. + */ +var char *cursor; +var char *wcursor; +var line *wdot; + +/* + * Undo information is saved in a LBSIZE buffer at "vutmp" for changes + * within the current line, or as for command mode for multi-line changes + * or changes on lines no longer the current line. + * The change kind "VCAPU" is used immediately after a U undo to prevent + * two successive U undo's from destroying the previous state. + */ +#define VNONE 0 +#define VCHNG 1 +#define VMANY 2 +#define VCAPU 3 +#define VMCHNG 4 +#define VMANYINS 5 + +var short vundkind; /* Which kind of undo - from above */ +var char *vutmp; /* Prev line image when "VCHNG" */ + +/* + * State information for undoing of macros. The basic idea is that + * if the macro does only 1 change or even none, we don't treat it + * specially. If it does 2 or more changes we want to be able to + * undo it as a unit. We remember how many changes have been made + * within the current macro. (Remember macros can be nested.) + */ +#define VC_NOTINMAC 0 /* Not in a macro */ +#define VC_NOCHANGE 1 /* In a macro, no changes so far */ +#define VC_ONECHANGE 2 /* In a macro, one change so far */ +#define VC_MANYCHANGE 3 /* In a macro, at least 2 changes so far */ + +var short vch_mac; /* Change state - one of the above */ + +/* + * For U undo's the line is grabbed by "vmove" after it first appears + * on that line. The "vUNDdot" which specifies which line has been + * saved is selectively cleared when changes involving other lines + * are made, i.e. after a 'J' join. This is because a 'JU' would + * lose completely the text of the line just joined on. + */ +var char *vUNDcurs; /* Cursor just before 'U' */ +var line *vUNDdot; /* The line address of line saved in vUNDsav */ +var line vUNDsav; /* Grabbed initial "*dot" */ + +#define killU() vUNDdot = NOLINE + +/* + * There are a number of cases where special behaviour is needed + * from deeply nested routines. This is accomplished by setting + * the bits of hold, which acts to change the state of the general + * visual editing behaviour in specific ways. + * + * HOLDAT prevents the clreol (clear to end of line) routines from + * putting out @'s or ~'s on empty lines. + * + * HOLDDOL prevents the reopen routine from putting a '$' at the + * end of a reopened line in list mode (for hardcopy mode, e.g.). + * + * HOLDROL prevents spurious blank lines when scrolling in hardcopy + * open mode. + * + * HOLDQIK prevents the fake insert mode during repeated commands. + * + * HOLDPUPD prevents updating of the physical screen image when + * mucking around while in insert mode. + * + * HOLDECH prevents clearing of the echo area while rolling the screen + * backwards (e.g.) in deference to the clearing of the area at the + * end of the scroll (1 time instead of n times). The fact that this + * is actually needed is recorded in heldech, which says that a clear + * of the echo area was actually held off. + */ +var short hold; +var short holdupd; /* Hold off update when echo line is too long */ + +#define HOLDAT 1 +#define HOLDDOL 2 +#define HOLDROL 4 +#define HOLDQIK 8 +#define HOLDPUPD 16 +#define HOLDECH 32 +#define HOLDWIG 64 + +/* + * Miscellaneous variables + */ +var short CDCNT; /* Count of ^D's in insert on this line */ +var cell DEL[VBSIZE]; /* Last deleted text */ +var bool HADUP; /* This insert line started with ^ then ^D */ +var bool HADZERO; /* This insert line started with 0 then ^D */ +var cell INS[VBSIZE]; /* Last inserted text */ +var int Vlines; /* Number of file lines "before" vi command */ +var int Xcnt; /* External variable holding last cmd's count */ +var bool Xhadcnt; /* Last command had explicit count? */ +var short ZERO; +var short dir; /* Direction for search (+1 or -1) */ +var short doomed; /* Disply chars right of cursor to be killed */ +var bool gobblebl; /* Wrapmargin space generated nl, eat a space */ +var bool hadcnt; /* (Almost) internal to vmain() */ +var bool heldech; /* We owe a clear of echo area */ +var bool insmode; /* Are in character insert mode */ +var cell lastcmd[5]; /* Chars in last command */ +var int lastcnt; /* Count for last command */ +var cell *lastcp; /* Save current command here to repeat */ +var bool lasthad; /* Last command had a count? */ +var int lastvgk; /* Previous input key, if not from keyboard */ +var short lastreg; /* Register with last command */ +var char *ncols['z'-'a'+2]; /* Cursor positions of marks */ +var char *notenam; /* Name to be noted with change count */ +var char *notesgn; /* Change count from last command */ +var int op; /* Operation of current command */ +var int Peekkey; /* Peek ahead key */ +var bool rubble; /* Line is filthy (in hardcopy open), redraw! */ +var int vSCROLL; /* Number lines to scroll on ^D/^U */ +var cell *vglobp; /* Untyped input (e.g. repeat insert text) */ +var char vmacbuf[VBSIZE]; /* Text of visual macro, hence nonnestable */ +var char *vmacp; /* Like vglobp but for visual macros */ +var char *vmcurs; /* Cursor for restore after undo d), e.g. */ +var short vmovcol; /* Column to try to keep on arrow keys */ +var bool vmoving; /* Are trying to keep vmovcol */ +var short vreg; /* Reg for this command */ /* mjm: was char */ +var short wdkind; /* Liberal/conservative words? */ +var cell workcmd[5]; /* Temporary for lastcmd */ +var char *vcolbp; /* first byte of current character in column */ + + +/* + * Macros + */ +#define INF 30000 +#define LASTLINE LINE(vcnt) +#define OVERBUF QUOTE +#define beep obeep +#define cindent() ((outline - vlinfo[vcline].vliny) * WCOLS + outcol) +#define vputp(cp, cnt) tputs(cp, cnt, vputch) +#define vputc(c) putch(c) |