174 lines
6.5 KiB
C
174 lines
6.5 KiB
C
/* Cursor motion calculation definitions for GNU Emacs
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Copyright (C) 1985, 1989, 2001-2024 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef EMACS_CM_H
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#define EMACS_CM_H
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/* Holds the minimum and maximum costs for the parameterized capabilities. */
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struct parmcap
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{
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int mincost, maxcost;
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};
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/* This structure holds everything needed to do cursor motion except the pad
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character (PC) and the output speed of the terminal (ospeed), which
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termcap wants in global variables. */
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struct cm
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{
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/* Cursor position. -1 in *both* variables means the cursor
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position is unknown, in order to force absolute cursor motion. */
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int cm_curY; /* Current row */
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int cm_curX; /* Current column */
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/* Capabilities from termcap */
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const char *cm_up; /* up (up) */
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const char *cm_down; /* down (do) */
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const char *cm_left; /* left (le) */
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const char *cm_right; /* right (nd) */
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const char *cm_home; /* home (ho) */
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const char *cm_cr; /* carriage return (cr) */
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const char *cm_ll; /* last line (ll) */
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const char *cm_tab; /* tab (ta) */
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const char *cm_backtab; /* backtab (bt) */
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char *cm_abs; /* absolute (cm) */
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const char *cm_habs; /* horizontal absolute (ch) */
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const char *cm_vabs; /* vertical absolute (cv) */
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#if false
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const char *cm_ds; /* "don't send" string (ds) */
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#endif
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const char *cm_multiup; /* multiple up (UP) */
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const char *cm_multidown; /* multiple down (DO) */
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const char *cm_multileft; /* multiple left (LE) */
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const char *cm_multiright; /* multiple right (RI) */
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int cm_cols; /* number of cols on screen (co) */
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int cm_rows; /* number of rows on screen (li) */
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int cm_tabwidth; /* tab width (it) */
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bool_bf cm_autowrap : 1; /* autowrap flag (am) */
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bool_bf cm_magicwrap : 1; /* VT-100: cursor stays in last col but
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will cm_wrap if next char is
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printing (xn) */
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bool_bf cm_usetabs : 1; /* if set, use tabs */
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bool_bf cm_losewrap : 1; /* if reach right margin, forget cursor
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location */
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bool_bf cm_autolf : 1; /* \r performs a \r\n (rn) */
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/* Parameterized capabilities. This needs to be a struct since
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the costs are accessed through pointers. */
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#if false
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struct parmcap cc_abs; /* absolute (cm) */
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struct parmcap cc_habs; /* horizontal absolute (ch) */
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struct parmcap cc_vabs; /* vertical absolute (cv) */
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struct parmcap cc_multiup; /* multiple up (UP) */
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struct parmcap cc_multidown; /* multiple down (DO) */
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struct parmcap cc_multileft; /* multiple left (LE) */
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struct parmcap cc_multiright; /* multiple right (RI) */
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#endif
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/* Costs for the non-parameterized capabilities */
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int cc_up; /* cost for up */
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int cc_down; /* etc. */
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int cc_left;
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int cc_right;
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int cc_home;
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int cc_cr;
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int cc_ll;
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int cc_tab;
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int cc_backtab;
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/* These are temporary, until the code is installed to use the
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struct parmcap fields above. */
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int cc_abs;
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int cc_habs;
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int cc_vabs;
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};
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/* Shorthand */
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#ifndef NoCMShortHand
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#define curY(tty) (tty)->Wcm->cm_curY
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#define curX(tty) (tty)->Wcm->cm_curX
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#define Up(tty) (tty)->Wcm->cm_up
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#define Down(tty) (tty)->Wcm->cm_down
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#define Left(tty) (tty)->Wcm->cm_left
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#define Right(tty) (tty)->Wcm->cm_right
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#define Tab(tty) (tty)->Wcm->cm_tab
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#define BackTab(tty) (tty)->Wcm->cm_backtab
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#define TabWidth(tty) (tty)->Wcm->cm_tabwidth
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#define CR(tty) (tty)->Wcm->cm_cr
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#define Home(tty) (tty)->Wcm->cm_home
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#define LastLine(tty) (tty)->Wcm->cm_ll
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#define AbsPosition(tty) (tty)->Wcm->cm_abs
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#define ColPosition(tty) (tty)->Wcm->cm_habs
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#define RowPosition(tty) (tty)->Wcm->cm_vabs
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#define MultiUp(tty) (tty)->Wcm->cm_multiup
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#define MultiDown(tty) (tty)->Wcm->cm_multidown
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#define MultiLeft(tty) (tty)->Wcm->cm_multileft
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#define MultiRight(tty) (tty)->Wcm->cm_multiright
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#define AutoWrap(tty) (tty)->Wcm->cm_autowrap
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#define MagicWrap(tty) (tty)->Wcm->cm_magicwrap
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#define UseTabs(tty) (tty)->Wcm->cm_usetabs
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#define FrameRows(tty) (tty)->Wcm->cm_rows
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#define FrameCols(tty) (tty)->Wcm->cm_cols
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#define UpCost(tty) (tty)->Wcm->cc_up
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#define DownCost(tty) (tty)->Wcm->cc_down
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#define LeftCost(tty) (tty)->Wcm->cc_left
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#define RightCost(tty) (tty)->Wcm->cc_right
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#define HomeCost(tty) (tty)->Wcm->cc_home
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#define CRCost(tty) (tty)->Wcm->cc_cr
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#define LastLineCost(tty) (tty)->Wcm->cc_ll
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#define TabCost(tty) (tty)->Wcm->cc_tab
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#define BackTabCost(tty) (tty)->Wcm->cc_backtab
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#define AbsPositionCost(tty) (tty)->Wcm->cc_abs
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#define ColPositionCost(tty) (tty)->Wcm->cc_habs
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#define RowPositionCost(tty) (tty)->Wcm->cc_vabs
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#define MultiUpCost(tty) (tty)->Wcm->cc_multiup
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#define MultiDownCost(tty) (tty)->Wcm->cc_multidown
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#define MultiLeftCost(tty) (tty)->Wcm->cc_multileft
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#define MultiRightCost(tty) (tty)->Wcm->cc_multiright
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#endif /* NoCMShortHand */
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#define cmat(tty,row,col) (curY(tty) = (row), curX(tty) = (col))
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#define cmplus(tty,n) \
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{ \
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if ((curX (tty) += (n)) >= FrameCols (tty) && !MagicWrap (tty)) \
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{ \
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if ((tty)->Wcm->cm_losewrap) losecursor (tty); \
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else if (AutoWrap (tty)) curX (tty) = 0, curY (tty)++; \
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else curX (tty)--; \
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} \
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}
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#define losecursor(tty) (curX(tty) = -1, curY(tty) = -1)
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extern int cost;
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extern int evalcost (int c);
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#define emacs_tputs(tty, str, affcnt, putc) (current_tty = (tty), tputs (str, affcnt, putc))
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extern struct tty_display_info *current_tty;
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extern void cmcheckmagic (struct tty_display_info *);
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extern int cmputc (int);
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extern void cmcostinit (struct tty_display_info *);
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extern void cmgoto (struct tty_display_info *, int, int);
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extern void Wcm_clear (struct tty_display_info *);
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extern int Wcm_init (struct tty_display_info *);
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#endif /* EMACS_CM_H */
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