--- /dev/null
+/* Cursor motion subroutines for XEmacs.
+ Copyright (C) 1985, 1994, 1995 Free Software Foundation, Inc.
+ loosely based primarily on public domain code written by Chris Torek
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: FSF 19.30. Substantially different from FSF. */
+
+/* #### This file is extremely junky and needs major fixup. */
+
+#include <config.h>
+#include "lisp.h"
+
+#include "console-tty.h"
+#include "frame.h"
+#include "lstream.h"
+#include "redisplay.h"
+
+#define EXPENSIVE 2000
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern char *tgoto (CONST char *cm, int hpos, int vpos);
+extern void tputs (CONST char *, int, void (*)(int));
+#ifdef __cplusplus
+}
+#endif
+
+static void cmgoto_for_real (struct console *c, int row, int col);
+
+static int cm_cost_counter; /* sums up costs */
+
+static void
+evalcost (int c)
+{
+ cm_cost_counter++;
+}
+
+/* Ugh -- cmputc() can't take a console argument, so we pass it in a global */
+struct console *cmputc_console;
+
+void
+send_string_to_tty_console (struct console *c, unsigned char *str, int len)
+{
+ /* #### Ben sez: don't some terminals need nulls outputted
+ for proper timing? */
+ Lstream *lstr = XLSTREAM (CONSOLE_TTY_DATA (c)->outstream);
+
+ if (CONSOLE_TTY_REAL_CURSOR_X (c) != CONSOLE_TTY_CURSOR_X (c)
+ || CONSOLE_TTY_REAL_CURSOR_Y (c) != CONSOLE_TTY_CURSOR_Y (c))
+ {
+ int row = CONSOLE_TTY_CURSOR_Y (c);
+ int col = CONSOLE_TTY_CURSOR_X (c);
+ cmgoto_for_real (c, row, col);
+ }
+
+ if (len == 1)
+ Lstream_putc (lstr, *str);
+ else if (len > 0)
+ Lstream_write (lstr, str, len);
+}
+
+void
+cmputc (int c)
+{
+ unsigned char ch = (unsigned char) c;
+
+ if (termscript)
+ fputc (c, termscript);
+
+ send_string_to_tty_console (cmputc_console, &ch, 1);
+}
+
+#if 0
+
+/*
+ * Terminals with magicwrap (xn) don't all behave identically.
+ * The VT100 leaves the cursor in the last column but will wrap before
+ * printing the next character. I hear that the Concept terminal does
+ * the wrap immediately but ignores the next newline it sees. And some
+ * terminals just have buggy firmware, and think that the cursor is still
+ * in limbo if we use direct cursor addressing from the phantom column.
+ * The only guaranteed safe thing to do is to emit a CRLF immediately
+ * after we reach the last column; this takes us to a known state.
+ */
+void
+cmcheckmagic (void)
+{
+ if (curX == FrameCols)
+ {
+ if (!MagicWrap || curY >= FrameRows - 1)
+ abort ();
+ if (termscript)
+ putc ('\r', termscript);
+ putchar ('\r');
+ if (termscript)
+ putc ('\n', termscript);
+ putchar ('\n');
+ curX = 0;
+ curY++;
+ }
+}
+
+#endif /* 0 */
+
+/*
+ * (Re)Initialize the cost factors, given the output speed of the
+ * terminal in DEVICE_TTY_DATA (dev)->ospeed. (Note: this holds B300,
+ * B9600, etc -- ie stuff out of <sgtty.h>.)
+ */
+void
+cm_cost_init (struct console *c)
+{
+ char *tmp;
+
+ cm_cost_counter = 0;
+#define COST(x,e) (x \
+ ? (cm_cost_counter = 0, tputs (x, 1, e), cm_cost_counter) \
+ : EXPENSIVE)
+#define MINCOST(x,e) ((x == 0) \
+ ? EXPENSIVE \
+ : (tmp = tgoto(x, 0, 0), COST(tmp,e)))
+
+ TTY_COST (c).cm_up = COST (TTY_CM (c).up, evalcost);
+ TTY_COST (c).cm_down = COST (TTY_CM (c).down, evalcost);
+ TTY_COST (c).cm_left = COST (TTY_CM (c).left, evalcost);
+ TTY_COST (c).cm_right = COST (TTY_CM (c).right, evalcost);
+ TTY_COST (c).cm_home = COST (TTY_CM (c).home, evalcost);
+ TTY_COST (c).cm_low_left = COST (TTY_CM (c).low_left, evalcost);
+ TTY_COST (c).cm_car_return = COST (TTY_CM (c).car_return, evalcost);
+
+ /*
+ * These last three are actually minimum costs. When (if) they are
+ * candidates for the least-cost motion, the real cost is computed.
+ * (Note that "0" is the assumed to generate the minimum cost.
+ * While this is not necessarily true, I have yet to see a terminal
+ * for which is not; all the terminals that have variable-cost
+ * cursor motion seem to take straight numeric values. --ACT)
+ */
+
+ TTY_COST (c).cm_abs = MINCOST (TTY_CM (c).abs, evalcost);
+ TTY_COST (c).cm_hor_abs = MINCOST (TTY_CM (c).hor_abs, evalcost);
+ TTY_COST (c).cm_ver_abs = MINCOST (TTY_CM (c).ver_abs, evalcost);
+
+#undef MINCOST
+#undef COST
+}
+
+/*
+ * Calculate the cost to move from (srcy, srcx) to (dsty, dstx) using
+ * up and down, and left and right, and motions. If doit is set
+ * actually perform the motion.
+ */
+
+#ifdef NOT_YET
+static int
+calccost (struct frame *f, int srcy, int srcx, int dsty, int dstx, int doit)
+{
+ struct console *c = XCONSOLE (FRAME_CONSOLE (f));
+ int totalcost = 0;
+ int deltay, deltax;
+ char *motion;
+ int motion_cost;
+
+#if 0
+ int ntabs, n2tabs, tabx, tab2x, tabcost;
+#endif
+
+ cmputc_console = c;
+#if 0
+ /* If have just wrapped on a terminal with xn,
+ don't believe the cursor position: give up here
+ and force use of absolute positioning. */
+ if (curX == Wcm.cm_cols)
+ goto fail;
+#endif
+
+ deltay = dsty - srcy;
+ if (!deltay)
+ goto calculate_x;
+
+ if (deltay < 0)
+ {
+ motion = TTY_CM (c).up;
+ motion_cost = TTY_COST (c).cm_up;
+ deltay = -deltay;
+ }
+ else
+ {
+ motion = TTY_CM (c).down;
+ motion_cost = TTY_COST (c).cm_down;
+ }
+
+ if (motion_cost == EXPENSIVE)
+ {
+/* if (doit) */
+ /* #### printing OOF is not acceptable */
+ return motion_cost;
+ }
+
+ totalcost = motion_cost * deltay;
+
+ if (doit)
+ while (--deltay >= 0)
+ tputs (motion, 1, cmputc);
+
+calculate_x:
+
+ deltax = dstx - srcx;
+ if (!deltax)
+ goto done;
+
+ if (deltax < 0)
+ {
+ motion = TTY_CM (c).left;
+ motion_cost = TTY_COST (c).cm_left;
+ deltax = -deltax;
+ }
+ else
+ {
+ motion = TTY_CM (c).right;
+ motion_cost = TTY_COST (c).cm_right;
+ }
+
+ if (motion_cost == EXPENSIVE)
+ {
+/* if (doit) */
+ /* #### printing OOF is not acceptable */
+ return motion_cost;
+ }
+
+ totalcost += motion_cost * deltax;
+
+ if (doit)
+ while (--deltax >= 0)
+ tputs (motion, 1, cmputc);
+
+done:
+ return totalcost;
+}
+#endif /* NOT_YET */
+
+#define USEREL 0
+#define USEHOME 1
+#define USELL 2
+#define USECR 3
+
+#if OLD_CURSOR_MOTION_SHIT
+void
+cmgoto (struct frame *f, int row, int col)
+{
+ struct console *c = XCONSOLE (FRAME_CONSOLE (f));
+ char *motion;
+#if 0
+ int frame_x = FRAME_CURSOR_X(f);
+ int frame_y = FRAME_CURSOR_Y(f);
+ int relcost, directcost, llcost;
+ int homecost;
+ int use;
+ char *dcm;
+#endif
+
+ cmputc_console = c;
+
+ /* First the degenerate case */
+#if 0
+ if (row == frame_y && col == frame_x)
+ return;
+#endif
+
+ /* #### something is fucked with the non-absolute cases */
+ motion = tgoto (TTY_CM (c).abs, col, row);
+ tputs (motion, 1, cmputc);
+ CONSOLE_TTY_DATA (c)->cursor_x = col;
+ CONSOLE_TTY_DATA (c)->cursor_y = row;
+ return;
+
+#if 0
+ if (frame_y >= 0 && frame_x >= 0)
+ {
+ /*
+ * Pick least-cost motions
+ */
+
+ relcost = calccost (f, frame_y, frame_x, row, col, 0);
+ use = USEREL;
+
+ homecost = TTY_COST (c).cm_home;
+ if (homecost < EXPENSIVE)
+ homecost += calccost (f, 0, 0, row, col, 0);
+
+ if (homecost < relcost)
+ {
+ relcost = homecost;
+ use = USEHOME;
+ }
+
+ llcost = TTY_COST (c).cm_low_left;
+ if (llcost < EXPENSIVE)
+ llcost += calccost (f, frame_y - 1, 0, row, col, 0);
+
+ if (llcost < relcost)
+ {
+ relcost = llcost;
+ use = USELL;
+ }
+
+#if 0
+ if ((crcost = Wcm.cc_cr) < BIG) {
+ if (Wcm.cm_autolf)
+ if (curY + 1 >= Wcm.cm_rows)
+ crcost = BIG;
+ else
+ crcost += calccost (curY + 1, 0, row, col, 0);
+ else
+ crcost += calccost (curY, 0, row, col, 0);
+ }
+ if (crcost < relcost)
+ relcost = crcost, use = USECR;
+#endif
+
+ directcost = TTY_COST (c).cm_abs;
+ dcm = TTY_CM (c).abs;
+
+ if (row == frame_y && TTY_COST (c).cm_hor_abs < EXPENSIVE)
+ {
+ directcost = TTY_COST (c).cm_hor_abs;
+ dcm = TTY_CM (c).hor_abs;
+ }
+ else if (col == frame_x && TTY_COST (c).cm_ver_abs < EXPENSIVE)
+ {
+ directcost = TTY_COST (c).cm_ver_abs;
+ dcm = TTY_CM (c).ver_abs;
+ }
+ }
+ else
+ {
+ directcost = 0;
+ relcost = 100000;
+ dcm = TTY_CM (c).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 */
+ cm_cost_counter = 0;
+ motion = (dcm == TTY_CM (c).hor_abs
+ ? tgoto (dcm, row, col)
+ : tgoto (dcm, col, row));
+ tputs (motion, 1, evalcost);
+ if (cm_cost_counter <= relcost)
+ { /* really is cheaper */
+ tputs (motion, 1, cmputc);
+ FRAME_CURSOR_Y (f) = row;
+ FRAME_CURSOR_X (f) = col;
+ return;
+ }
+ }
+
+ switch (use)
+ {
+ case USEHOME:
+ tputs (TTY_CM (c).home, 1, cmputc);
+ FRAME_CURSOR_X (f) = 0;
+ FRAME_CURSOR_Y (f) = 0;
+ break;
+
+ case USELL:
+ tputs (TTY_CM (c).low_left, 1, cmputc);
+ FRAME_CURSOR_Y (f) = FRAME_HEIGHT (f) - 1;
+ FRAME_CURSOR_X (f) = 0;
+ break;
+
+#if 0
+ case USECR:
+ tputs (Wcm.cm_cr, 1, cmputc);
+ if (Wcm.cm_autolf)
+ curY++;
+ curX = 0;
+ break;
+#endif
+ }
+
+ calccost (f, FRAME_CURSOR_Y (f), FRAME_CURSOR_X (f), row, col, 1);
+ FRAME_CURSOR_Y (f) = row;
+ FRAME_CURSOR_X (f) = col;
+#endif
+}
+#endif /* OLD_CURSOR_MOTION_SHIT */
+
+/*****************************************************************************
+ cmgoto
+
+ This function is responsible for getting the cursor from its current
+ location to the passed location in the most efficient manner
+ possible.
+ ****************************************************************************/
+static void
+cmgoto_for_real (struct console *c, int row, int col)
+{
+ char *motion;
+
+ cmputc_console = c;
+
+ /* First make sure that we actually have to do any work at all. */
+ if (CONSOLE_TTY_REAL_CURSOR_X (c) == col
+ && CONSOLE_TTY_REAL_CURSOR_Y (c) == row)
+ return;
+
+ CONSOLE_TTY_REAL_CURSOR_X (c) = col;
+ CONSOLE_TTY_REAL_CURSOR_Y (c) = row;
+
+ /* #### Need to reimplement cost analysis and potential relative
+ movement. */
+
+ /* If all else fails, use absolute movement. */
+ motion = tgoto (TTY_CM (c).abs, col, row);
+ tputs (motion, 1, cmputc);
+ CONSOLE_TTY_CURSOR_X (c) = col;
+ CONSOLE_TTY_CURSOR_Y (c) = row;
+}
+
+void
+cmgoto (struct frame *f, int row, int col)
+{
+ /* We delay cursor motion until we do something other than cursor motion,
+ to optimize the case where cmgoto() is called twice in a row. */
+ struct console *c = XCONSOLE (FRAME_CONSOLE (f));
+ CONSOLE_TTY_CURSOR_X (c) = col;
+ CONSOLE_TTY_CURSOR_Y (c) = row;
+}
+
+#if 0
+/* Clear out all terminal info.
+ Used before copying into it the info on the actual terminal.
+ */
+
+void
+Wcm_clear (void)
+{
+ xzero (Wcm);
+ UP = 0;
+ BC = 0;
+}
+#endif
+
+#if 0
+/*
+ * Initialized stuff
+ * Return 0 if can do CM.
+ * Return -1 if cannot.
+ * Return -2 if size not specified.
+ */
+
+int
+Wcm_init (void)
+{
+#if 0
+ if (Wcm.cm_abs && !Wcm.cm_ds)
+ return 0;
+#endif
+ if (Wcm.cm_abs)
+ return 0;
+ /* Require up and left, and, if no absolute, down and right */
+ if (!Wcm.cm_up || !Wcm.cm_left)
+ return - 1;
+ if (!Wcm.cm_abs && (!Wcm.cm_down || !Wcm.cm_right))
+ return - 1;
+ /* Check that we know the size of the frame.... */
+ if (Wcm.cm_rows <= 0 || Wcm.cm_cols <= 0)
+ return - 2;
+ return 0;
+}
+#endif
projects / chise / xemacs-chise.git / blobdiff