/* Functions related to terminal devices.
- Copyright (C) 2005-2015 Free Software Foundation, Inc.
+ Copyright (C) 2005-2016 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
#include <stdio.h>
#include "lisp.h"
+#include "character.h"
#include "frame.h"
#include "termchar.h"
#include "termhooks.h"
-#include "charset.h"
-#include "coding.h"
#include "keyboard.h"
-/* Chain of all terminals currently in use. */
+#if HAVE_STRUCT_UNIPAIR_UNICODE
+# include <errno.h>
+# include <linux/kd.h>
+# include <sys/ioctl.h>
+#endif
+
+/* Chain of all terminals currently in use. */
struct terminal *terminal_list;
-/* The first unallocated terminal id. */
+/* The first unallocated terminal id. */
static int next_terminal_id;
-/* The initial terminal device, created by initial_term_init. */
+/* The initial terminal device, created by initial_term_init. */
struct terminal *initial_terminal;
-static Lisp_Object Qterminal_live_p;
-
static void delete_initial_terminal (struct terminal *);
/* This setter is used only in this file, so it can be private. */
(*FRAME_TERMINAL (f)->raw_cursor_to_hook) (f, row, col);
}
-/* Erase operations */
+/* Erase operations. */
-/* Clear from cursor to end of frame. */
+/* Clear from cursor to end of frame. */
void
clear_to_end (struct frame *f)
{
(*FRAME_TERMINAL (f)->clear_to_end_hook) (f);
}
-/* Clear entire frame */
+/* Clear entire frame. */
void
clear_frame (struct frame *f)
(*FRAME_TERMINAL (f)->ins_del_lines_hook) (f, vpos, n);
}
+/* Return the terminal object specified by TERMINAL. TERMINAL may
+ be a terminal object, a frame, or nil for the terminal device of
+ the current frame. If TERMINAL is neither from the above or the
+ resulting terminal object is deleted, return NULL. */
-\f
-
-/* Return the terminal object specified by TERMINAL. TERMINAL may be
- a terminal object, a frame, or nil for the terminal device of the
- current frame. If THROW is false, return NULL for failure,
- otherwise throw an error. */
-
-struct terminal *
-get_terminal (Lisp_Object terminal, bool throw)
+static struct terminal *
+decode_terminal (Lisp_Object terminal)
{
- struct terminal *result = NULL;
+ struct terminal *t;
if (NILP (terminal))
terminal = selected_frame;
+ t = (TERMINALP (terminal)
+ ? XTERMINAL (terminal)
+ : FRAMEP (terminal) ? FRAME_TERMINAL (XFRAME (terminal)) : NULL);
+ return t && t->name ? t : NULL;
+}
- if (TERMINALP (terminal))
- result = XTERMINAL (terminal);
- else if (FRAMEP (terminal))
- result = FRAME_TERMINAL (XFRAME (terminal));
+/* Like above, but throw an error if TERMINAL is not valid or deleted. */
- if (result && !result->name)
- result = NULL;
+struct terminal *
+decode_live_terminal (Lisp_Object terminal)
+{
+ struct terminal *t = decode_terminal (terminal);
- if (result == NULL && throw)
+ if (!t)
wrong_type_argument (Qterminal_live_p, terminal);
+ return t;
+}
+
+/* Like decode_terminal, but ensure that the resulting terminal object refers
+ to a text-based terminal device. */
- return result;
+struct terminal *
+decode_tty_terminal (Lisp_Object terminal)
+{
+ struct terminal *t = decode_live_terminal (terminal);
+
+ return (t->type == output_termcap || t->type == output_msdos_raw) ? t : NULL;
}
-\f
+/* Return an active (not suspended) text-based terminal device that uses
+ the tty device with the given NAME, or NULL if the named terminal device
+ is not opened. */
+
+struct terminal *
+get_named_terminal (const char *name)
+{
+ struct terminal *t;
+
+ eassert (name);
+
+ for (t = terminal_list; t; t = t->next_terminal)
+ {
+ if ((t->type == output_termcap || t->type == output_msdos_raw)
+ && !strcmp (t->display_info.tty->name, name)
+ && TERMINAL_ACTIVE_P (t))
+ return t;
+ }
+ return NULL;
+}
+
+/* Allocate basically initialized terminal. */
-/* Create a new terminal object and add it to the terminal list. */
+static struct terminal *
+allocate_terminal (void)
+{
+ return ALLOCATE_ZEROED_PSEUDOVECTOR
+ (struct terminal, next_terminal, PVEC_TERMINAL);
+}
+
+/* Create a new terminal object of TYPE and add it to the terminal list. RIF
+ may be NULL if this terminal type doesn't support window-based redisplay. */
struct terminal *
-create_terminal (void)
+create_terminal (enum output_method type, struct redisplay_interface *rif)
{
struct terminal *terminal = allocate_terminal ();
Lisp_Object terminal_coding, keyboard_coding;
terminal->next_terminal = terminal_list;
terminal_list = terminal;
-
+ terminal->type = type;
+ terminal->rif = rif;
terminal->id = next_terminal_id++;
terminal->keyboard_coding = xmalloc (sizeof (struct coding_system));
}
}
-Lisp_Object Qrun_hook_with_args;
-static Lisp_Object Qdelete_terminal_functions;
DEFUN ("delete-terminal", Fdelete_terminal, Sdelete_terminal, 0, 2, 0,
doc: /* Delete TERMINAL by deleting all frames on it and closing the terminal.
TERMINAL may be a terminal object, a frame, or nil (meaning the
but if the second argument FORCE is non-nil, you may do so. */)
(Lisp_Object terminal, Lisp_Object force)
{
- struct terminal *t = get_terminal (terminal, 0);
+ struct terminal *t = decode_terminal (terminal);
if (!t)
return Qnil;
possible return values. */)
(Lisp_Object object)
{
- struct terminal *t;
-
- t = get_terminal (object, 0);
+ struct terminal *t = decode_terminal (object);
if (!t)
return Qnil;
selected frame's terminal). */)
(Lisp_Object terminal)
{
- struct terminal *t
- = TERMINALP (terminal) ? XTERMINAL (terminal) : get_terminal (terminal, 1);
+ struct terminal *t = decode_live_terminal (terminal);
return t->name ? build_string (t->name) : Qnil;
}
selected frame's terminal). */)
(Lisp_Object terminal)
{
- struct terminal *t
- = TERMINALP (terminal) ? XTERMINAL (terminal) : get_terminal (terminal, 1);
- return Fcopy_alist (t->param_alist);
+ return Fcopy_alist (decode_live_terminal (terminal)->param_alist);
}
DEFUN ("terminal-parameter", Fterminal_parameter, Sterminal_parameter, 2, 2, 0,
selected frame's terminal). */)
(Lisp_Object terminal, Lisp_Object parameter)
{
- Lisp_Object value;
- struct terminal *t
- = TERMINALP (terminal) ? XTERMINAL (terminal) : get_terminal (terminal, 1);
CHECK_SYMBOL (parameter);
- value = Fcdr (Fassq (parameter, t->param_alist));
- return value;
+ return Fcdr (Fassq (parameter, decode_live_terminal (terminal)->param_alist));
}
DEFUN ("set-terminal-parameter", Fset_terminal_parameter,
selected frame's terminal). */)
(Lisp_Object terminal, Lisp_Object parameter, Lisp_Object value)
{
- struct terminal *t
- = TERMINALP (terminal) ? XTERMINAL (terminal) : get_terminal (terminal, 1);
- return store_terminal_param (t, parameter, value);
+ return store_terminal_param (decode_live_terminal (terminal), parameter, value);
+}
+
+#if HAVE_STRUCT_UNIPAIR_UNICODE
+
+/* Compute the glyph code table for T. */
+
+static void
+calculate_glyph_code_table (struct terminal *t)
+{
+ Lisp_Object glyphtab = Qt;
+ enum { initial_unipairs = 1000 };
+ int entry_ct = initial_unipairs;
+ struct unipair unipair_buffer[initial_unipairs];
+ struct unipair *entries = unipair_buffer;
+ struct unipair *alloced = 0;
+
+ while (true)
+ {
+ int fd = fileno (t->display_info.tty->output);
+ struct unimapdesc unimapdesc = { entry_ct, entries };
+ if (ioctl (fd, GIO_UNIMAP, &unimapdesc) == 0)
+ {
+ glyphtab = Fmake_char_table (Qnil, make_number (-1));
+ for (int i = 0; i < unimapdesc.entry_ct; i++)
+ char_table_set (glyphtab, entries[i].unicode,
+ make_number (entries[i].fontpos));
+ break;
+ }
+ if (errno != ENOMEM)
+ break;
+ entry_ct = unimapdesc.entry_ct;
+ entries = alloced = xrealloc (alloced, entry_ct * sizeof *alloced);
+ }
+
+ xfree (alloced);
+ t->glyph_code_table = glyphtab;
+}
+#endif
+
+/* Return the glyph code in T of character CH, or -1 if CH does not
+ have a font position in T, or nil if T does not report glyph codes. */
+
+Lisp_Object
+terminal_glyph_code (struct terminal *t, int ch)
+{
+#if HAVE_STRUCT_UNIPAIR_UNICODE
+ if (t->type == output_termcap)
+ {
+ /* As a hack, recompute the table when CH is the maximum
+ character. */
+ if (NILP (t->glyph_code_table) || ch == MAX_CHAR)
+ calculate_glyph_code_table (t);
+
+ if (! EQ (t->glyph_code_table, Qt))
+ return char_table_ref (t->glyph_code_table, ch);
+ }
+#endif
+
+ return Qnil;
}
/* Initial frame has no device-dependent output data, but has
if (initialized || terminal_list || tty_list)
emacs_abort ();
- initial_terminal = create_terminal ();
- initial_terminal->type = output_initial;
+ initial_terminal = create_terminal (output_initial, NULL);
initial_terminal->name = xstrdup ("initial_terminal");
initial_terminal->kboard = initial_kboard;
initial_terminal->delete_terminal_hook = &delete_initial_terminal;
initial_terminal->delete_frame_hook = &initial_free_frame_resources;
- /* All other hooks are NULL. */
+ /* Other hooks are NULL by default. */
return initial_terminal;
}