termo/driver-ti.c

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17 KiB
C
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// We want strdup()
#define _XOPEN_SOURCE 600
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#include "termo.h"
#include "termo-internal.h"
#ifdef HAVE_UNIBILIUM
# include <unibilium.h>
#else
# include <curses.h>
# include <term.h>
#endif
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
// To be efficient at lookups, we store the byte sequence => keyinfo mapping
// in a trie. This avoids a slow linear search through a flat list of
// sequences. Because it is likely most nodes will be very sparse, we optimise
// vector to store an extent map after the database is loaded.
typedef enum
{
TYPE_KEY,
TYPE_ARRAY,
TYPE_MOUSE,
}
trie_nodetype_t;
typedef struct trie_node
{
trie_nodetype_t type;
}
trie_node_t;
typedef struct trie_node_key
{
trie_nodetype_t type;
keyinfo_t key;
}
trie_node_key_t;
typedef struct trie_node_array
{
trie_nodetype_t type;
unsigned char min, max; // INCLUSIVE endpoints of the extent range
trie_node_t *arr[]; // dynamic size at allocation time
}
trie_node_array_t;
typedef struct
{
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termo_t *tk;
trie_node_t *root;
char *start_string;
char *stop_string;
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char *set_mouse_string;
}
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termo_ti_t;
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static int funcname2keysym (const char *funcname, termo_type_t *typep,
termo_sym_t *symp, int *modmask, int *modsetp);
static int insert_seq (termo_ti_t *ti, const char *seq, trie_node_t *node);
static trie_node_t *
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new_node_key (termo_type_t type, termo_sym_t sym, int modmask, int modset)
{
trie_node_key_t *n = malloc (sizeof *n);
if (!n)
return NULL;
n->type = TYPE_KEY;
n->key.type = type;
n->key.sym = sym;
n->key.modifier_mask = modmask;
n->key.modifier_set = modset;
return (trie_node_t *) n;
}
static trie_node_t *
new_node_arr (unsigned char min, unsigned char max)
{
trie_node_array_t *n = malloc (sizeof *n
+ ((int) max - min + 1) * sizeof n->arr[0]);
if (!n)
return NULL;
n->type = TYPE_ARRAY;
n->min = min;
n->max = max;
int i;
for (i = min; i <= max; i++)
n->arr[i - min] = NULL;
return (trie_node_t *) n;
}
static trie_node_t *
lookup_next (trie_node_t *n, unsigned char b)
{
switch (n->type)
{
case TYPE_KEY:
case TYPE_MOUSE:
fprintf (stderr, "fatal: lookup_next within a TYPE_KEY node\n");
abort ();
case TYPE_ARRAY:
{
trie_node_array_t *nar = (trie_node_array_t *) n;
if (b < nar->min || b > nar->max)
return NULL;
return nar->arr[b - nar->min];
}
}
return NULL; // Never reached but keeps compiler happy
}
static void
free_trie (trie_node_t *n)
{
switch (n->type)
{
case TYPE_KEY:
case TYPE_MOUSE:
break;
case TYPE_ARRAY:
{
trie_node_array_t *nar = (trie_node_array_t *) n;
int i;
for (i = nar->min; i <= nar->max; i++)
if (nar->arr[i - nar->min])
free_trie (nar->arr[i - nar->min]);
}
}
free (n);
}
static trie_node_t *
compress_trie (struct trie_node *n)
{
if (!n)
return NULL;
switch (n->type)
{
case TYPE_KEY:
case TYPE_MOUSE:
return n;
case TYPE_ARRAY:
{
trie_node_array_t *nar = (trie_node_array_t *) n;
// Find the real bounds
unsigned char min, max;
for (min = 0; !nar->arr[min]; min++)
;
for (max = 0xff; !nar->arr[max]; max--)
;
trie_node_array_t *new = (trie_node_array_t *) new_node_arr (min, max);
int i;
for (i = min; i <= max; i++)
new->arr[i - min] = compress_trie (nar->arr[i]);
free (nar);
return (trie_node_t *) new;
}
}
return n;
}
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static bool
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load_terminfo (termo_ti_t *ti, const char *term)
{
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const char *mouse_report_string = NULL;
bool result = false;
#ifdef HAVE_UNIBILIUM
unibi_term *unibi = unibi_from_term (term);
if (!unibi)
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return false;
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for (int i = unibi_string_begin_ + 1; i < unibi_string_end_; i++)
{
const char *name = unibi_name_str (i);
const char *value = unibi_get_str (unibi, i);
#else
// Have to cast away the const. But it's OK - we know terminfo won't
// really modify term
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int err;
TERMINAL *saved_term = set_curterm (NULL);
if (setupterm ((char *) term, 1, &err) != OK)
{
set_curterm (saved_term);
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return false;
}
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for (int i = 0; strfnames[i]; i++)
{
const char *name = strfnames[i];
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const char *value = tigetstr (strnames[i]);
#endif
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// Only care about the key_* constants
if (strncmp (name, "key_", 4) != 0)
continue;
if (!value || value == (char*) -1)
continue;
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trie_node_t *node = NULL;
if (!strcmp (name + 4, "mouse"))
mouse_report_string = value;
else
{
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termo_type_t type;
termo_sym_t sym;
int mask = 0;
int set = 0;
if (!funcname2keysym (name + 4, &type, &sym, &mask, &set))
continue;
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if (sym == TERMO_SYM_NONE)
continue;
node = new_node_key (type, sym, mask, set);
}
if (node && !insert_seq (ti, value, node))
{
free (node);
goto fail;
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}
}
// Clone the behaviour of ncurses for xterm mouse support
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const char *set_mouse_string = NULL;
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#ifdef HAVE_UNIBILIUM
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size_t xm = unibi_add_ext_str (unibi, "XM", NULL);
if (xm != SIZE_MAX)
set_mouse_string = unibi_get_ext_str (unibi, xm);
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#else
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set_mouse_string = tigetstr ("XM");
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#endif
if (!set_mouse_string || set_mouse_string == (char *) -1)
ti->set_mouse_string = strdup ("\x1b[?1000%?%p1%{1}%=%th%el%;");
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else
ti->set_mouse_string = strdup (set_mouse_string);
// We handle 1006 and 1015 unconditionally in driver-csi.c,
// and don't want to have the handling diverted by recent terminfo;
// let's hardcode the ancient 1000 sequence locally
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if (mouse_report_string)
{
trie_node_t *node = malloc (sizeof *node);
if (!node)
goto fail;
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node->type = TYPE_MOUSE;
if (!insert_seq (ti, "\x1b[M", node))
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{
free (node);
goto fail;
}
}
if (!mouse_report_string && strstr (term, "xterm") != term)
ti->tk->guessed_mouse_proto = TERMO_MOUSE_PROTO_NONE;
else if (strstr (term, "rxvt") == term)
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// urxvt didn't understand the SGR protocol until version 9.25,
// it's safest to keep using 1015.
ti->tk->guessed_mouse_proto = TERMO_MOUSE_PROTO_RXVT;
else
// SGR (1006) is the superior protocol. If it's not supported by the
// terminal, nothing much happens and we continue getting events via
// the original protocol (1000). We can't afford to enable the UTF-8
// protocol (1005) because it collides with the original (1000) and we
// have no way of knowing if it's supported by the terminal. Also both
// 1000 and 1005 are broken in that they may produce characters that
// are illegal in the current locale's charset.
ti->tk->guessed_mouse_proto = TERMO_MOUSE_PROTO_SGR;
// Preset the active protocol to our wild guess
ti->tk->mouse_proto = ti->tk->guessed_mouse_proto;
// Take copies of these terminfo strings, in case we build multiple termo
// instances for multiple different termtypes, and it's different by the
// time we want to use it
#ifdef HAVE_UNIBILIUM
const char *keypad_xmit = unibi_get_str (unibi, unibi_keypad_xmit);
#endif
if (keypad_xmit)
ti->start_string = strdup (keypad_xmit);
else
ti->start_string = NULL;
#ifdef HAVE_UNIBILIUM
const char *keypad_local = unibi_get_str (unibi, unibi_keypad_local);
#endif
if (keypad_local)
ti->stop_string = strdup (keypad_local);
else
ti->stop_string = NULL;
result = true;
fail:
#ifdef HAVE_UNIBILIUM
unibi_destroy (unibi);
#else
del_curterm (set_curterm (saved_term));
#endif
return result;
}
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static bool
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write_string (termo_t *tk, char *string)
{
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if (tk->fd == -1 || !isatty (tk->fd) || !string)
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return true;
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// The terminfo database will contain keys in application cursor key mode.
// We may need to enable that mode
// Can't call putp or tputs because they suck and don't give us fd control
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size_t len = strlen (string);
while (len)
{
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ssize_t written = write (tk->fd, string, len);
if (written == -1)
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return false;
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string += written;
len -= written;
}
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return true;
}
static bool
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set_mouse (termo_ti_t *ti, bool enable)
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{
#ifdef HAVE_UNIBILIUM
unibi_var_t params[9] = { enable, 0, 0, 0, 0, 0, 0, 0, 0 };
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char start_string[unibi_run (ti->set_mouse_string, params, NULL, 0) + 1];
start_string[unibi_run (ti->set_mouse_string, params,
start_string, sizeof start_string - 1)] = 0;
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#else
char *start_string = tparm (ti->set_mouse_string,
enable, 0, 0, 0, 0, 0, 0, 0, 0);
#endif
return write_string (ti->tk, start_string);
}
static bool
mouse_reset (termo_ti_t *ti)
{
// Disable everything, a de-facto reset for all terminal mouse protocols
return set_mouse (ti, false)
&& write_string (ti->tk, "\x1b[?1002l")
&& write_string (ti->tk, "\x1b[?1003l")
&& write_string (ti->tk, "\x1b[?1004l")
&& write_string (ti->tk, "\x1b[?1005l")
&& write_string (ti->tk, "\x1b[?1006l")
&& write_string (ti->tk, "\x1b[?1015l");
}
static bool
mouse_set_tracking_mode (void *data,
termo_mouse_tracking_t tracking, bool enable)
{
termo_ti_t *ti = data;
if (tracking == TERMO_MOUSE_TRACKING_CLICK)
return set_mouse (ti, enable);
if (tracking == TERMO_MOUSE_TRACKING_DRAG)
return write_string (ti->tk, enable ? "\x1b[?1002h" : "\x1b[?1002l");
if (tracking == TERMO_MOUSE_TRACKING_MOVE)
return write_string (ti->tk, enable ? "\x1b[?1003h" : "\x1b[?1003l");
return true;
}
static bool
mouse_set_proto (void *data, termo_mouse_proto_t proto, bool enable)
{
termo_ti_t *ti = data;
// TERMO_MOUSE_PROTO_XTERM is ignored here; it is the default protocol
if (proto == TERMO_MOUSE_PROTO_UTF8)
return write_string (ti->tk, enable ? "\x1b[?1005h" : "\x1b[?1005l");
if (proto == TERMO_MOUSE_PROTO_SGR)
return write_string (ti->tk, enable ? "\x1b[?1006h" : "\x1b[?1006l");
if (proto == TERMO_MOUSE_PROTO_RXVT)
return write_string (ti->tk, enable ? "\x1b[?1015h" : "\x1b[?1015l");
return true;
}
static int
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start_driver (termo_t *tk, void *info)
{
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termo_ti_t *ti = info;
if (!write_string (tk, ti->start_string))
return false;
// If there's no protocol, it doesn't make sense to try anything else
if (tk->mouse_proto == TERMO_MOUSE_PROTO_NONE)
return true;
// Disable everything mouse-related first
if (!mouse_reset (ti))
return false;
// Enable focus tracking opportunistically and automatically,
// as it basically doesn't have any negative consequences at all
return mouse_set_proto (ti, tk->mouse_proto, true)
&& mouse_set_tracking_mode (ti, tk->mouse_tracking, true)
&& write_string (ti->tk, "\x1b[?1004h");
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}
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static int
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stop_driver (termo_t *tk, void *info)
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{
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termo_ti_t *ti = info;
if (!write_string (tk, ti->stop_string))
return false;
// If there's no protocol, it doesn't make sense to try anything else
if (tk->mouse_proto == TERMO_MOUSE_PROTO_NONE)
return true;
return mouse_set_proto (ti, tk->mouse_proto, false)
&& mouse_set_tracking_mode (ti, tk->mouse_tracking, false)
&& write_string (ti->tk, "\x1b[?1004l");
}
static void *
new_driver (termo_t *tk, const char *term)
{
termo_ti_t *ti = calloc (1, sizeof *ti);
if (!ti)
return NULL;
ti->tk = tk;
ti->root = new_node_arr (0, 0xff);
if (!ti->root)
goto abort_free_ti;
if (!load_terminfo (ti, term))
goto abort_free_trie;
ti->root = compress_trie (ti->root);
tk->ti_data = ti;
tk->ti_method.set_mouse_proto = mouse_set_proto;
tk->ti_method.set_mouse_tracking_mode = mouse_set_tracking_mode;
return ti;
abort_free_trie:
free_trie (ti->root);
abort_free_ti:
free (ti);
return NULL;
}
static void
free_driver (void *info)
{
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termo_ti_t *ti = info;
ti->tk->ti_data = NULL;
ti->tk->ti_method.set_mouse_proto = NULL;
ti->tk->ti_method.set_mouse_tracking_mode = NULL;
free_trie (ti->root);
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free (ti->set_mouse_string);
free (ti->start_string);
free (ti->stop_string);
free (ti);
}
#define CHARAT(i) (tk->buffer[tk->buffstart + (i)])
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static termo_result_t
peekkey (termo_t *tk, void *info,
termo_key_t *key, int flags, size_t *nbytep)
{
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termo_ti_t *ti = info;
if (tk->buffcount == 0)
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return tk->is_closed ? TERMO_RES_EOF : TERMO_RES_NONE;
trie_node_t *p = ti->root;
unsigned int pos = 0;
while (pos < tk->buffcount)
{
p = lookup_next (p, CHARAT (pos));
if (!p)
break;
pos++;
if (p->type == TYPE_KEY)
{
trie_node_key_t *nk = (trie_node_key_t *) p;
key->type = nk->key.type;
key->code.sym = nk->key.sym;
key->modifiers = nk->key.modifier_set;
*nbytep = pos;
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return TERMO_RES_KEY;
}
else if (p->type == TYPE_MOUSE)
{
tk->buffstart += pos;
tk->buffcount -= pos;
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termo_result_t mouse_result =
(*tk->method.peekkey_mouse) (tk, key, nbytep);
tk->buffstart -= pos;
tk->buffcount += pos;
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if (mouse_result == TERMO_RES_KEY)
*nbytep += pos;
return mouse_result;
}
}
// If p is not NULL then we hadn't walked off the end yet, so we have a
// partial match
if (p && !(flags & PEEKKEY_FORCE))
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return TERMO_RES_AGAIN;
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return TERMO_RES_NONE;
}
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static struct func
{
const char *funcname;
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termo_type_t type;
termo_sym_t sym;
int mods;
}
funcs[] =
{
// THIS LIST MUST REMAIN SORTED!
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{ "backspace", TERMO_TYPE_KEYSYM, TERMO_SYM_BACKSPACE, 0 },
{ "begin", TERMO_TYPE_KEYSYM, TERMO_SYM_BEGIN, 0 },
{ "beg", TERMO_TYPE_KEYSYM, TERMO_SYM_BEGIN, 0 },
{ "btab", TERMO_TYPE_KEYSYM, TERMO_SYM_TAB, TERMO_KEYMOD_SHIFT },
{ "cancel", TERMO_TYPE_KEYSYM, TERMO_SYM_CANCEL, 0 },
{ "clear", TERMO_TYPE_KEYSYM, TERMO_SYM_CLEAR, 0 },
{ "close", TERMO_TYPE_KEYSYM, TERMO_SYM_CLOSE, 0 },
{ "command", TERMO_TYPE_KEYSYM, TERMO_SYM_COMMAND, 0 },
{ "copy", TERMO_TYPE_KEYSYM, TERMO_SYM_COPY, 0 },
{ "dc", TERMO_TYPE_KEYSYM, TERMO_SYM_DELETE, 0 },
{ "down", TERMO_TYPE_KEYSYM, TERMO_SYM_DOWN, 0 },
{ "end", TERMO_TYPE_KEYSYM, TERMO_SYM_END, 0 },
{ "enter", TERMO_TYPE_KEYSYM, TERMO_SYM_ENTER, 0 },
{ "exit", TERMO_TYPE_KEYSYM, TERMO_SYM_EXIT, 0 },
{ "find", TERMO_TYPE_KEYSYM, TERMO_SYM_FIND, 0 },
{ "help", TERMO_TYPE_KEYSYM, TERMO_SYM_HELP, 0 },
{ "home", TERMO_TYPE_KEYSYM, TERMO_SYM_HOME, 0 },
{ "ic", TERMO_TYPE_KEYSYM, TERMO_SYM_INSERT, 0 },
{ "left", TERMO_TYPE_KEYSYM, TERMO_SYM_LEFT, 0 },
{ "mark", TERMO_TYPE_KEYSYM, TERMO_SYM_MARK, 0 },
{ "message", TERMO_TYPE_KEYSYM, TERMO_SYM_MESSAGE, 0 },
{ "mouse", TERMO_TYPE_KEYSYM, TERMO_SYM_NONE, 0 },
{ "move", TERMO_TYPE_KEYSYM, TERMO_SYM_MOVE, 0 },
// Not quite, but it's the best we can do
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{ "next", TERMO_TYPE_KEYSYM, TERMO_SYM_PAGEDOWN, 0 },
{ "npage", TERMO_TYPE_KEYSYM, TERMO_SYM_PAGEDOWN, 0 },
{ "open", TERMO_TYPE_KEYSYM, TERMO_SYM_OPEN, 0 },
{ "options", TERMO_TYPE_KEYSYM, TERMO_SYM_OPTIONS, 0 },
{ "ppage", TERMO_TYPE_KEYSYM, TERMO_SYM_PAGEUP, 0 },
// Not quite, but it's the best we can do
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{ "previous", TERMO_TYPE_KEYSYM, TERMO_SYM_PAGEUP, 0 },
{ "print", TERMO_TYPE_KEYSYM, TERMO_SYM_PRINT, 0 },
{ "redo", TERMO_TYPE_KEYSYM, TERMO_SYM_REDO, 0 },
{ "reference", TERMO_TYPE_KEYSYM, TERMO_SYM_REFERENCE, 0 },
{ "refresh", TERMO_TYPE_KEYSYM, TERMO_SYM_REFRESH, 0 },
{ "replace", TERMO_TYPE_KEYSYM, TERMO_SYM_REPLACE, 0 },
{ "restart", TERMO_TYPE_KEYSYM, TERMO_SYM_RESTART, 0 },
{ "resume", TERMO_TYPE_KEYSYM, TERMO_SYM_RESUME, 0 },
{ "right", TERMO_TYPE_KEYSYM, TERMO_SYM_RIGHT, 0 },
{ "save", TERMO_TYPE_KEYSYM, TERMO_SYM_SAVE, 0 },
{ "select", TERMO_TYPE_KEYSYM, TERMO_SYM_SELECT, 0 },
{ "suspend", TERMO_TYPE_KEYSYM, TERMO_SYM_SUSPEND, 0 },
{ "undo", TERMO_TYPE_KEYSYM, TERMO_SYM_UNDO, 0 },
{ "up", TERMO_TYPE_KEYSYM, TERMO_SYM_UP, 0 },
{ NULL },
};
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static int
func_compare (const void *key, const void *element)
{
return strcmp (key, ((struct func *) element)->funcname);
}
static int
funcname2keysym (const char *funcname,
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termo_type_t *typep, termo_sym_t *symp, int *modmaskp, int *modsetp)
{
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struct func *func = bsearch (funcname, funcs,
sizeof funcs / sizeof funcs[0], sizeof funcs[0], func_compare);
if (func)
{
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*typep = func->type;
*symp = func->sym;
*modmaskp = func->mods;
*modsetp = func->mods;
return 1;
}
if (funcname[0] == 'f' && isdigit (funcname[1]))
{
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*typep = TERMO_TYPE_FUNCTION;
*symp = atoi (funcname + 1);
return 1;
}
// Last-ditch attempt; maybe it's a shift key?
if (funcname[0] == 's' && funcname2keysym
(funcname + 1, typep, symp, modmaskp, modsetp))
{
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*modmaskp |= TERMO_KEYMOD_SHIFT;
*modsetp |= TERMO_KEYMOD_SHIFT;
return 1;
}
#ifdef DEBUG
fprintf (stderr, "TODO: Need to convert funcname"
" %s to a type/sym\n", funcname);
#endif
return 0;
}
static int
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insert_seq (termo_ti_t *ti, const char *seq, trie_node_t *node)
{
int pos = 0;
trie_node_t *p = ti->root;
// Unsigned because we'll be using it as an array subscript
unsigned char b;
while ((b = seq[pos]))
{
trie_node_t *next = lookup_next (p, b);
if (!next)
break;
p = next;
pos++;
}
while ((b = seq[pos]))
{
trie_node_t *next;
if (seq[pos+1])
// Intermediate node
next = new_node_arr (0, 0xff);
else
// Final key node
next = node;
if (!next)
return 0;
switch (p->type)
{
case TYPE_ARRAY:
{
trie_node_array_t *nar = (trie_node_array_t *) p;
if (b < nar->min || b > nar->max)
{
fprintf (stderr, "fatal: trie insert at 0x%02x is outside of"
" extent bounds (0x%02x..0x%02x)\n",
b, nar->min, nar->max);
abort ();
}
nar->arr[b - nar->min] = next;
p = next;
break;
}
case TYPE_KEY:
case TYPE_MOUSE:
fprintf (stderr, "fatal: tried to insert child node in TYPE_KEY\n");
abort ();
}
pos++;
}
return 1;
}
2014-10-14 00:08:15 +02:00
termo_driver_t termo_driver_ti =
{
.name = "terminfo",
.new_driver = new_driver,
.free_driver = free_driver,
.start_driver = start_driver,
.stop_driver = stop_driver,
.peekkey = peekkey,
};