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63cfb75f3a
Omit ‘#include "foo.h"’ unless the file needs foo.h (Bug#21707). In a few cases, add ‘#include "foo.h"’ if the file needs foo.h but does not include it directly. As a general rule, a source file should include foo.h if it needs the interfaces that foo.h defines. * src/alloc.c: Don’t include process.h. Include dispextern.h, systime.h. * src/atimer.c: Don’t include blockinput.h. * src/buffer.c: Include coding.h, systime.h. Don’t include keyboard.h, coding.h. * src/callint.c: Don’t include commands.h, keymap.h. * src/callproc.c: Don’t include character.h, ccl.h, composite.h, systty.h, termhooks.h. * src/casetab.c: Don’t include character.h. * src/category.c: Don’t include charset.h, keymap.h. * src/ccl.h: Don’t include character.h. * src/character.c: Don’t include charset.h. * src/charset.c: Don’t include disptab.h. * src/chartab.c: Don’t include ccl.h. * src/cm.c: Don’t include frame.h, termhooks.h. * src/cmds.c: Don’t include window.h, dispextern.h. * src/coding.c: Don’t include window.h, frame.h. * src/composite.c: Include composite.h. Don’t include window.h, font.h. * src/data.c: Don’t include syssignal.h, termhooks.h, font.h. * src/dbusbind.c: Don’t include frame.h. * src/decompress.c: Don’t include character.h. * src/dired.c: Don’t include character.h, commands.h, charset.h. * src/dispnew.c: Don’t include character.h, indent.h, intervals.h, process.h, timespec.h. Include systime.h. * src/doc.c: Include coding.h. Don’t include keyboard.h. * src/editfns.c: Include composite.h. Don’t include frame.h. * src/emacs.c: Include fcntl.h, coding.h. Don’t include commands.h, systty.h.. * src/fileio.c: Don’t include intervals.h, dispextern.h. Include composite.h. * src/filelock.c: Don’t include character.h, systime.h. * src/fns.c: Don’t include time.h, commands.h, keyboard.h, keymap.h, frame.h, blockinput.h, xterm.h. Include composite.h. * src/font.c: Include termhooks.h. * src/font.h: Don’t include ccl.h, frame.h. Add forward decls of struct composition_it, struct face, struct glyph_string. * src/fontset.c: Don’t include buffer.h, ccl.h, keyboard.h, intervals.h, window.h, termhooks.h. * src/frame.c: Don’t include character.h, commands.h, font.h. * src/frame.h: Don’t include dispextern.h. * src/fringe.c: Don’t include character.h. * src/ftcrfont.c: Don’t include dispextern.h, frame.h, character.h, charset.h, fontset.h. * src/ftfont.c: Don’t include frame.h, blockinput.h, coding.h, fontset.h. * src/ftxfont.c: Don’t include dispextern.h, character.h, charset.h, fontset.h. * src/gfilenotify.c: Don’t include frame.h, process.h. * src/gtkutil.c: Include dispextern.h, frame.h, systime.h. Don’t include syssignal.h, buffer.h, charset.h, font.h. * src/gtkutil.h: Don’t include frame.h. * src/image.c: Include fcntl.h and stdio.h instead of sysstdio.h. Don’t include character.h. * src/indent.c: Don’t include keyboard.h, termchar.h. * src/inotify.c: Don’t include character.h, frame.h. * src/insdel.c: Include composite.h. Don’t include blockinput.h. * src/intervals.c: Don’t include character.h, keyboard.h. * src/intervals.h: Don’t include dispextern.h, composite.h. * src/keyboard.c: Don’t include sysstdio.h, disptab.h, puresize.h. Include coding.h. * src/keyboard.h: Don’t incldue systime.h. * src/keymap.c: Don’t include charset.h, frame.h. * src/lread.c: Include dispextern.h and systime.h. Don’t include frame.h. Include systime.h. * src/macros.c: Don’t include commands.h, character.h, buffer.h. * src/menu.c: Include character.h, coding.h. Don’t include dispextern.h. * src/menu.h: Don’t include systime.h. * src/minibuf.c: Don’t include commands.h, dispextern.h, syntax.h, intervals.h, termhooks.h. * src/print.c: Include coding.h. Don’t include keyboard.h, window.h, dispextern.h, termchar.h, termhooks.h, font.h. Add forward decl of struct terminal. * src/process.c: Don’t include termhooks.h, commands.h, dispextern.h, composite.h. * src/region-cache.c: Don’t include character.h. * src/scroll.c: Don’t include keyboard.h, window.h. * src/search.c: Don’t include category.h, commands.h. * src/sound.c: Don’t include dispextern.h. * src/syntax.c: Don’t include command.h, keymap.h. * src/sysdep.c: Don’t include window.h, dispextern.h. * src/systime.h: Use ‘#ifdef emacs’, not ‘#ifdef EMACS_LISP_H’, * src/term.c: Don’t include systty.h, intervals.h, xterm.h. * src/terminal.c: Include character.h. Don’t include charset.h, coding.h. * src/textprop.c: Don’t include character.h. * src/undo.c: Don’t include character.h, commands.h, window.h. * src/unexsol.c: Don’t include character.h, charset.h. * src/widget.c: Include widget.h. Don’t include keyboard.h, window.h, dispextern.h, blockinput.h, character.h, font.h. * src/widgetprv.h: Don’t include widget.h. * src/window.c: Don’t include character.h, menu.h, intervals.h. * src/xdisp.c: Include composite.h, systime.h. Don’t include macros.h, process.h. * src/xfaces.c: Don’t include charset.h, keyboard.h, termhooks.h, intervals.h. * src/xfns.c: Don’t include menu.h, character.h, intervals.h, epaths.h, fontset.h, systime.h, atimer.h, termchar.h. * src/xfont.c: Don’t include dispextern.h, fontset.h, ccl.h. * src/xftfont.c: Don’t include dispextern.h, character.h, fontset.h. * src/xgselect.c: Don’t include timespec.h, frame.h. Include systime.h. * src/xgselect.h: Don’t include time.h. Use a forward decl to struct timespec instead. * src/xmenu.c: Don’t include keymap.h, character.h, charset.h, dispextern.h. Include systime.h. * src/xml.c: Don’t include character.h. * src/xrdb.c [USE_MOTIF]: Don’t include keyboard.h. * src/xselect.c: Don’t include dispextern.h, character.h, buffer.h, process.h. * src/xsmfns.c: Don’t include systime.h, sysselect.h. * src/xterm.c: Don’t include syssignal.h, charset.h, disptab.h, intervals.h process.h, keymap.h, xgselect.h. Include composite.h.
454 lines
12 KiB
C
454 lines
12 KiB
C
/* Cursor motion subroutines for GNU Emacs.
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Copyright (C) 1985, 1995, 2001-2015 Free Software Foundation, Inc.
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based primarily on public domain code written by Chris Torek
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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
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(at 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 <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <stdio.h>
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#include "lisp.h"
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#include "cm.h"
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#include "termchar.h"
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#include "tparam.h"
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#define BIG 9999 /* Good on 32-bit hosts. */
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int cost; /* sums up costs */
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/* ARGSUSED */
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int
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evalcost (int c)
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{
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cost++;
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return c;
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}
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/* The terminal to use for low-level output. */
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struct tty_display_info *current_tty;
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int
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cmputc (int c)
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{
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if (current_tty->termscript)
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putc (c & 0177, current_tty->termscript);
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putc (c & 0177, current_tty->output);
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return c;
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}
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/* NEXT TWO ARE DONE WITH MACROS */
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#if 0
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/*
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* Assume the cursor is at row row, column col. Normally used only after
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* clearing the screen, when the cursor is at (0, 0), but what the heck,
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* let's let the guy put it anywhere.
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*/
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static
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at (tty, row, col) {
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curY (tty) = row;
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curX (tty) = col;
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}
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/*
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* Add n columns to the current cursor position.
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*/
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static
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addcol (tty, n) {
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curX (tty) += n;
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/*
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* If cursor hit edge of screen, what happened?
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* N.B.: DO NOT!! write past edge of screen. If you do, you
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* deserve what you get. Furthermore, on terminals with
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* autowrap (but not magicwrap), don't write in the last column
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* of the last line.
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*/
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if (curX (tty) == tty->Wcm->cm_cols) {
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/*
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* Well, if magicwrap, still there, past the edge of the
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* screen (!). If autowrap, on the col 0 of the next line.
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* Otherwise on last column.
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*/
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if (tty->Wcm->cm_magicwrap)
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; /* "limbo" */
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else if (tty->Wcm->cm_autowrap) {
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curX (tty) = 0;
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curY (tty) ++; /* Beware end of screen! */
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}
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else
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curX (tty)--;
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}
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}
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#endif
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/*
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* Terminals with magicwrap (xn) don't all behave identically.
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* The VT100 leaves the cursor in the last column but will wrap before
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* printing the next character. I hear that the Concept terminal does
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* the wrap immediately but ignores the next newline it sees. And some
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* terminals just have buggy firmware, and think that the cursor is still
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* in limbo if we use direct cursor addressing from the phantom column.
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* The only guaranteed safe thing to do is to emit a CRLF immediately
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* after we reach the last column; this takes us to a known state.
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*/
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void
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cmcheckmagic (struct tty_display_info *tty)
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{
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if (curX (tty) == FrameCols (tty))
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{
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if (!MagicWrap (tty) || curY (tty) >= FrameRows (tty) - 1)
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emacs_abort ();
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if (tty->termscript)
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putc ('\r', tty->termscript);
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putc ('\r', tty->output);
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if (tty->termscript)
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putc ('\n', tty->termscript);
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putc ('\n', tty->output);
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curX (tty) = 0;
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curY (tty)++;
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}
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}
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/*
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* (Re)Initialize the cost factors, given the output speed of the terminal
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* in the variable ospeed. (Note: this holds B300, B9600, etc -- ie stuff
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* out of <sgtty.h>.)
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*/
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void
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cmcostinit (struct tty_display_info *tty)
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{
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char *p;
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#define COST(x,e) (x ? (cost = 0, tputs (x, 1, e), cost) : BIG)
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#define CMCOST(x,e) ((x == 0) ? BIG : (p = tgoto(x, 0, 0), COST(p ,e)))
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tty->Wcm->cc_up = COST (tty->Wcm->cm_up, evalcost);
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tty->Wcm->cc_down = COST (tty->Wcm->cm_down, evalcost);
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tty->Wcm->cc_left = COST (tty->Wcm->cm_left, evalcost);
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tty->Wcm->cc_right = COST (tty->Wcm->cm_right, evalcost);
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tty->Wcm->cc_home = COST (tty->Wcm->cm_home, evalcost);
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tty->Wcm->cc_cr = COST (tty->Wcm->cm_cr, evalcost);
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tty->Wcm->cc_ll = COST (tty->Wcm->cm_ll, evalcost);
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tty->Wcm->cc_tab = tty->Wcm->cm_tabwidth ? COST (tty->Wcm->cm_tab, evalcost) : BIG;
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/*
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* These last three are actually minimum costs. When (if) they are
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* candidates for the least-cost motion, the real cost is computed.
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* (Note that "0" is the assumed to generate the minimum cost.
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* While this is not necessarily true, I have yet to see a terminal
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* for which is not; all the terminals that have variable-cost
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* cursor motion seem to take straight numeric values. --ACT)
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*/
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tty->Wcm->cc_abs = CMCOST (tty->Wcm->cm_abs, evalcost);
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tty->Wcm->cc_habs = CMCOST (tty->Wcm->cm_habs, evalcost);
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tty->Wcm->cc_vabs = CMCOST (tty->Wcm->cm_vabs, evalcost);
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#undef CMCOST
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#undef COST
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}
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/*
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* Calculate the cost to move from (srcy, srcx) to (dsty, dstx) using
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* up and down, and left and right, motions, and tabs. If doit is set
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* actually perform the motion.
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*/
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static int
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calccost (struct tty_display_info *tty,
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int srcy, int srcx, int dsty, int dstx, int doit)
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{
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register int deltay,
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deltax,
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c,
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totalcost;
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int ntabs,
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n2tabs,
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tabx,
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tab2x,
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tabcost;
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register const char *p;
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/* If have just wrapped on a terminal with xn,
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don't believe the cursor position: give up here
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and force use of absolute positioning. */
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if (curX (tty) == tty->Wcm->cm_cols)
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goto fail;
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totalcost = 0;
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if ((deltay = dsty - srcy) == 0)
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goto x;
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if (deltay < 0)
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p = tty->Wcm->cm_up, c = tty->Wcm->cc_up, deltay = -deltay;
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else
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p = tty->Wcm->cm_down, c = tty->Wcm->cc_down;
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if (c == BIG) { /* caint get thar from here */
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if (doit)
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printf ("OOPS");
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return c;
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}
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totalcost = c * deltay;
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if (doit)
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do
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emacs_tputs (tty, p, 1, cmputc);
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while (--deltay > 0);
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x:
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if ((deltax = dstx - srcx) == 0)
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goto done;
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if (deltax < 0) {
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p = tty->Wcm->cm_left, c = tty->Wcm->cc_left, deltax = -deltax;
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goto dodelta; /* skip all the tab junk */
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}
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/* Tabs (the toughie) */
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if (tty->Wcm->cc_tab >= BIG || !tty->Wcm->cm_usetabs)
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goto olddelta; /* forget it! */
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/*
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* ntabs is # tabs towards but not past dstx; n2tabs is one more
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* (ie past dstx), but this is only valid if that is not past the
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* right edge of the screen. We can check that at the same time
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* as we figure out where we would be if we use the tabs (which
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* we will put into tabx (for ntabs) and tab2x (for n2tabs)).
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*/
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ntabs = (deltax + srcx % tty->Wcm->cm_tabwidth) / tty->Wcm->cm_tabwidth;
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n2tabs = ntabs + 1;
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tabx = (srcx / tty->Wcm->cm_tabwidth + ntabs) * tty->Wcm->cm_tabwidth;
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tab2x = tabx + tty->Wcm->cm_tabwidth;
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if (tab2x >= tty->Wcm->cm_cols) /* too far (past edge) */
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n2tabs = 0;
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/*
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* Now set tabcost to the cost for using ntabs, and c to the cost
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* for using n2tabs, then pick the minimum.
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*/
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/* cost for ntabs + cost for right motion */
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tabcost = ntabs ? ntabs * tty->Wcm->cc_tab + (dstx - tabx) * tty->Wcm->cc_right
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: BIG;
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/* cost for n2tabs + cost for left motion */
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c = n2tabs ? n2tabs * tty->Wcm->cc_tab + (tab2x - dstx) * tty->Wcm->cc_left
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: BIG;
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if (c < tabcost) /* then cheaper to overshoot & back up */
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ntabs = n2tabs, tabcost = c, tabx = tab2x;
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if (tabcost >= BIG) /* caint use tabs */
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goto newdelta;
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/*
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* See if tabcost is less than just moving right
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*/
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if (tabcost < (deltax * tty->Wcm->cc_right)) {
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totalcost += tabcost; /* use the tabs */
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if (doit)
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while (--ntabs >= 0)
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emacs_tputs (tty, tty->Wcm->cm_tab, 1, cmputc);
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srcx = tabx;
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}
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/*
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* Now might as well just recompute the delta.
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*/
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newdelta:
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if ((deltax = dstx - srcx) == 0)
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goto done;
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olddelta:
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if (deltax > 0)
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p = tty->Wcm->cm_right, c = tty->Wcm->cc_right;
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else
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p = tty->Wcm->cm_left, c = tty->Wcm->cc_left, deltax = -deltax;
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dodelta:
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if (c == BIG) { /* caint get thar from here */
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fail:
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if (doit)
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printf ("OOPS");
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return BIG;
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}
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totalcost += c * deltax;
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if (doit)
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do
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emacs_tputs (tty, p, 1, cmputc);
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while (--deltax > 0);
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done:
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return totalcost;
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}
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#if 0
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void
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losecursor (void)
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{
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curY = -1;
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}
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#endif
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#define USEREL 0
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#define USEHOME 1
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#define USELL 2
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#define USECR 3
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void
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cmgoto (struct tty_display_info *tty, int row, int col)
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{
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int homecost,
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crcost,
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llcost,
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relcost,
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directcost;
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int use IF_LINT (= 0);
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char *p;
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const char *dcm;
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/* First the degenerate case */
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if (row == curY (tty) && col == curX (tty)) /* already there */
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return;
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if (curY (tty) >= 0 && curX (tty) >= 0)
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{
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/* We may have quick ways to go to the upper-left, bottom-left,
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* start-of-line, or start-of-next-line. Or it might be best to
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* start where we are. Examine the options, and pick the cheapest.
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*/
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relcost = calccost (tty, curY (tty), curX (tty), row, col, 0);
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use = USEREL;
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if ((homecost = tty->Wcm->cc_home) < BIG)
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homecost += calccost (tty, 0, 0, row, col, 0);
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if (homecost < relcost)
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relcost = homecost, use = USEHOME;
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if ((llcost = tty->Wcm->cc_ll) < BIG)
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llcost += calccost (tty, tty->Wcm->cm_rows - 1, 0, row, col, 0);
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if (llcost < relcost)
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relcost = llcost, use = USELL;
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if ((crcost = tty->Wcm->cc_cr) < BIG) {
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if (tty->Wcm->cm_autolf)
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if (curY (tty) + 1 >= tty->Wcm->cm_rows)
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crcost = BIG;
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else
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crcost += calccost (tty, curY (tty) + 1, 0, row, col, 0);
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else
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crcost += calccost (tty, curY (tty), 0, row, col, 0);
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}
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if (crcost < relcost)
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relcost = crcost, use = USECR;
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directcost = tty->Wcm->cc_abs, dcm = tty->Wcm->cm_abs;
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if (row == curY (tty) && tty->Wcm->cc_habs < BIG)
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directcost = tty->Wcm->cc_habs, dcm = tty->Wcm->cm_habs;
|
|
else if (col == curX (tty) && tty->Wcm->cc_vabs < BIG)
|
|
directcost = tty->Wcm->cc_vabs, dcm = tty->Wcm->cm_vabs;
|
|
}
|
|
else
|
|
{
|
|
directcost = 0, relcost = 100000;
|
|
dcm = tty->Wcm->cm_abs;
|
|
}
|
|
|
|
/*
|
|
* In the following comparison, the = in <= is because when the costs
|
|
* are the same, it looks nicer (I think) to move directly there.
|
|
*/
|
|
if (directcost <= relcost)
|
|
{
|
|
/* compute REAL direct cost */
|
|
cost = 0;
|
|
p = (dcm == tty->Wcm->cm_habs
|
|
? tgoto (dcm, row, col)
|
|
: tgoto (dcm, col, row));
|
|
emacs_tputs (tty, p, 1, evalcost);
|
|
if (cost <= relcost)
|
|
{ /* really is cheaper */
|
|
emacs_tputs (tty, p, 1, cmputc);
|
|
curY (tty) = row, curX (tty) = col;
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch (use)
|
|
{
|
|
case USEHOME:
|
|
emacs_tputs (tty, tty->Wcm->cm_home, 1, cmputc);
|
|
curY (tty) = 0, curX (tty) = 0;
|
|
break;
|
|
|
|
case USELL:
|
|
emacs_tputs (tty, tty->Wcm->cm_ll, 1, cmputc);
|
|
curY (tty) = tty->Wcm->cm_rows - 1, curX (tty) = 0;
|
|
break;
|
|
|
|
case USECR:
|
|
emacs_tputs (tty, tty->Wcm->cm_cr, 1, cmputc);
|
|
if (tty->Wcm->cm_autolf)
|
|
curY (tty)++;
|
|
curX (tty) = 0;
|
|
break;
|
|
}
|
|
|
|
(void) calccost (tty, curY (tty), curX (tty), row, col, 1);
|
|
curY (tty) = row, curX (tty) = col;
|
|
}
|
|
|
|
/* Clear out all terminal info.
|
|
Used before copying into it the info on the actual terminal.
|
|
*/
|
|
|
|
void
|
|
Wcm_clear (struct tty_display_info *tty)
|
|
{
|
|
memset (tty->Wcm, 0, sizeof (struct cm));
|
|
UP = 0;
|
|
BC = 0;
|
|
}
|
|
|
|
/*
|
|
* Initialized stuff
|
|
* Return 0 if can do CM.
|
|
* Return -1 if cannot.
|
|
* Return -2 if size not specified.
|
|
*/
|
|
|
|
int
|
|
Wcm_init (struct tty_display_info *tty)
|
|
{
|
|
#if 0
|
|
if (tty->Wcm->cm_abs && !tty->Wcm->cm_ds)
|
|
return 0;
|
|
#endif
|
|
if (tty->Wcm->cm_abs)
|
|
return 0;
|
|
/* Require up and left, and, if no absolute, down and right */
|
|
if (!tty->Wcm->cm_up || !tty->Wcm->cm_left)
|
|
return - 1;
|
|
if (!tty->Wcm->cm_abs && (!tty->Wcm->cm_down || !tty->Wcm->cm_right))
|
|
return - 1;
|
|
/* Check that we know the size of the screen.... */
|
|
if (tty->Wcm->cm_rows <= 0 || tty->Wcm->cm_cols <= 0)
|
|
return - 2;
|
|
return 0;
|
|
}
|