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Gunnar Ritter
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ex_vis.h
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ex_vis.h
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/*
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* This code contains changes by
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* Gunnar Ritter, Freiburg i. Br., Germany, 2002. All rights reserved.
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*
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* Conditions 1, 2, and 4 and the no-warranty notice below apply
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* to these changes.
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*
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*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*
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* Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* Redistributions of source code and documentation must retain the
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* above copyright notice, this list of conditions and the following
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* disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed or owned by Caldera
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* International, Inc.
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* Neither the name of Caldera International, Inc. nor the names of
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* other contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
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* INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from ex_vis.h 7.4 (Berkeley) 5/31/85
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*
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* @(#)ex_vis.h 1.15 (gritter) 11/27/04
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*/
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/*
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* Ex version 3
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* Mark Horton, UCB
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* Bill Joy UCB
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*
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* Open and visual mode definitions.
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*
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* There are actually 4 major states in open/visual modes. These
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* are visual, crt open (where the cursor can move about the screen and
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* the screen can scroll and be erased), one line open (on dumb glass-crt's
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* like the adm3), and hardcopy open (for everything else).
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*
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* The basic state is given by bastate, and the current state by state,
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* since we can be in pseudo-hardcopy mode if we are on an adm3 and the
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* line is longer than 80.
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*/
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var enum {
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VISUAL = 0,
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CRTOPEN = 1,
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ONEOPEN = 2,
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HARDOPEN = 3
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} bastate, state;
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/*
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* The screen in visual and crtopen is of varying size; the basic
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* window has top basWTOP and basWLINES lines are thereby implied.
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* The current window (which may have grown from the basic size)
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* has top WTOP and WLINES lines. The top line of the window is WTOP,
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* and the bottom line WBOT. The line WECHO is used for messages,
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* search strings and the like. If WBOT==WECHO then we are in ONEOPEN
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* or HARDOPEN and there is no way back to the line we were on if we
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* go to WECHO (i.e. we will have to scroll before we go there, and
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* we can't get back). There are WCOLS columns per line.
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* If WBOT!=WECHO then WECHO will be the last line on the screen
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* and WBOT is the line before it.
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*/
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var short basWTOP;
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var short basWLINES;
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var short WTOP;
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var short WBOT;
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var short WLINES;
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var short WCOLS;
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var short WECHO;
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/*
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* When we are dealing with the echo area we consider the window
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* to be "split" and set the variable splitw. Otherwise, moving
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* off the bottom of the screen into WECHO causes a screen rollup.
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*/
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var bool splitw;
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/*
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* Information about each line currently on the screen includes
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* the y coordinate associated with the line, the printing depth
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* of the line (0 indicates unknown), and a mask which indicates
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* whether the line is "unclean", i.e. whether we should check
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* to make sure the line is displayed correctly at the next
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* appropriate juncture.
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*/
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struct vlinfo {
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short vliny; /* Y coordinate */ /* mjm: was char */
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short vdepth; /* Depth of displayed line */ /*mjm: was char */
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short vflags; /* Is line potentially dirty ? */
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};
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var struct vlinfo vlinfo[TUBELINES + 2];
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#define DEPTH(c) (vlinfo[c].vdepth)
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#define LINE(c) (vlinfo[c].vliny)
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#define FLAGS(c) (vlinfo[c].vflags)
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#define VDIRT 1
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/*
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* Hacks to copy vlinfo structures around
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*/
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# define vlcopy(i, j) i = j;
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/*
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* The current line on the screen is represented by vcline.
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* There are vcnt lines on the screen, the last being "vcnt - 1".
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* Vcline is intimately tied to the current value of dot,
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* and when command mode is used as a subroutine fancy footwork occurs.
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*/
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var short vcline;
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var short vcnt;
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/*
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* To allow many optimizations on output, an exact image of the terminal
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* screen is maintained in the space addressed by vtube0. The vtube
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* array indexes this space as lines, and is shuffled on scrolls, insert+delete
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* lines and the like rather than (more expensively) shuffling the screen
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* data itself. It is also rearranged during insert mode across line
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* boundaries to make incore work easier.
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*/
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var cell *vtube[TUBELINES];
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var cell *vtube0;
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/*
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* The current cursor position within the current line is kept in
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* cursor. The current line is kept in linebuf. During insertions
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* we use the auxiliary array genbuf as scratch area.
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* The cursor wcursor and wdot are used in operations within/spanning
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* lines to mark the other end of the affected area, or the target
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* for a motion.
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*/
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var char *cursor;
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var char *wcursor;
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var line *wdot;
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/*
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* Undo information is saved in a LBSIZE buffer at "vutmp" for changes
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* within the current line, or as for command mode for multi-line changes
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* or changes on lines no longer the current line.
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* The change kind "VCAPU" is used immediately after a U undo to prevent
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* two successive U undo's from destroying the previous state.
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*/
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#define VNONE 0
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#define VCHNG 1
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#define VMANY 2
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#define VCAPU 3
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#define VMCHNG 4
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#define VMANYINS 5
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var short vundkind; /* Which kind of undo - from above */
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var char *vutmp; /* Prev line image when "VCHNG" */
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/*
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* State information for undoing of macros. The basic idea is that
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* if the macro does only 1 change or even none, we don't treat it
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* specially. If it does 2 or more changes we want to be able to
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* undo it as a unit. We remember how many changes have been made
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* within the current macro. (Remember macros can be nested.)
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*/
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#define VC_NOTINMAC 0 /* Not in a macro */
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#define VC_NOCHANGE 1 /* In a macro, no changes so far */
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#define VC_ONECHANGE 2 /* In a macro, one change so far */
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#define VC_MANYCHANGE 3 /* In a macro, at least 2 changes so far */
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var short vch_mac; /* Change state - one of the above */
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/*
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* For U undo's the line is grabbed by "vmove" after it first appears
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* on that line. The "vUNDdot" which specifies which line has been
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* saved is selectively cleared when changes involving other lines
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* are made, i.e. after a 'J' join. This is because a 'JU' would
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* lose completely the text of the line just joined on.
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*/
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var char *vUNDcurs; /* Cursor just before 'U' */
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var line *vUNDdot; /* The line address of line saved in vUNDsav */
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var line vUNDsav; /* Grabbed initial "*dot" */
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#define killU() vUNDdot = NOLINE
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/*
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* There are a number of cases where special behaviour is needed
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* from deeply nested routines. This is accomplished by setting
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* the bits of hold, which acts to change the state of the general
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* visual editing behaviour in specific ways.
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*
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* HOLDAT prevents the clreol (clear to end of line) routines from
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* putting out @'s or ~'s on empty lines.
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*
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* HOLDDOL prevents the reopen routine from putting a '$' at the
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* end of a reopened line in list mode (for hardcopy mode, e.g.).
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*
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* HOLDROL prevents spurious blank lines when scrolling in hardcopy
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* open mode.
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*
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* HOLDQIK prevents the fake insert mode during repeated commands.
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*
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* HOLDPUPD prevents updating of the physical screen image when
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* mucking around while in insert mode.
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*
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* HOLDECH prevents clearing of the echo area while rolling the screen
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* backwards (e.g.) in deference to the clearing of the area at the
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* end of the scroll (1 time instead of n times). The fact that this
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* is actually needed is recorded in heldech, which says that a clear
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* of the echo area was actually held off.
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*/
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var short hold;
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var short holdupd; /* Hold off update when echo line is too long */
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#define HOLDAT 1
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#define HOLDDOL 2
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#define HOLDROL 4
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#define HOLDQIK 8
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#define HOLDPUPD 16
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#define HOLDECH 32
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#define HOLDWIG 64
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/*
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* Miscellaneous variables
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*/
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var short CDCNT; /* Count of ^D's in insert on this line */
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var cell DEL[VBSIZE]; /* Last deleted text */
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var bool HADUP; /* This insert line started with ^ then ^D */
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var bool HADZERO; /* This insert line started with 0 then ^D */
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var cell INS[VBSIZE]; /* Last inserted text */
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var int Vlines; /* Number of file lines "before" vi command */
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var int Xcnt; /* External variable holding last cmd's count */
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var bool Xhadcnt; /* Last command had explicit count? */
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var short ZERO;
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var short dir; /* Direction for search (+1 or -1) */
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var short doomed; /* Disply chars right of cursor to be killed */
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var bool gobblebl; /* Wrapmargin space generated nl, eat a space */
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var bool hadcnt; /* (Almost) internal to vmain() */
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var bool heldech; /* We owe a clear of echo area */
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var bool insmode; /* Are in character insert mode */
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var cell lastcmd[5]; /* Chars in last command */
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var int lastcnt; /* Count for last command */
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var cell *lastcp; /* Save current command here to repeat */
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var bool lasthad; /* Last command had a count? */
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var short lastvgk; /* Previous input key, if not from keyboard */
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var short lastreg; /* Register with last command */
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var char *ncols['z'-'a'+2]; /* Cursor positions of marks */
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var char *notenam; /* Name to be noted with change count */
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var char *notesgn; /* Change count from last command */
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var int op; /* Operation of current command */
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var int Peekkey; /* Peek ahead key */
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var bool rubble; /* Line is filthy (in hardcopy open), redraw! */
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var int vSCROLL; /* Number lines to scroll on ^D/^U */
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var cell *vglobp; /* Untyped input (e.g. repeat insert text) */
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var char vmacbuf[VBSIZE]; /* Text of visual macro, hence nonnestable */
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var char *vmacp; /* Like vglobp but for visual macros */
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var char *vmcurs; /* Cursor for restore after undo d), e.g. */
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var short vmovcol; /* Column to try to keep on arrow keys */
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var bool vmoving; /* Are trying to keep vmovcol */
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var short vreg; /* Reg for this command */ /* mjm: was char */
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var short wdkind; /* Liberal/conservative words? */
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var cell workcmd[5]; /* Temporary for lastcmd */
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var char *vcolbp; /* first byte of current character in column */
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/*
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* Macros
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*/
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#define INF 30000
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#define LASTLINE LINE(vcnt)
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#define OVERBUF QUOTE
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#define beep obeep
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#define cindent() ((outline - vlinfo[vcline].vliny) * WCOLS + outcol)
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#define vputp(cp, cnt) tputs(cp, cnt, vputch)
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#define vputc(c) putch(c)
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