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input.c
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/* $XTermId: input.c,v 1.373 2024/09/30 07:48:35 tom Exp $ */
/*
* Copyright 1999-2023,2024 by Thomas E. Dickey
*
* All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*
*
* Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Digital Equipment
* Corporation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
*
*
* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/* input.c */
#include <xterm.h>
#include <X11/keysym.h>
#if HAVE_X11_DECKEYSYM_H
#include <X11/DECkeysym.h>
#endif
#if HAVE_X11_SUNKEYSYM_H
#include <X11/Sunkeysym.h>
#endif
#if HAVE_X11_XF86KEYSYM_H
#include <X11/XF86keysym.h>
#endif
#if !defined(HAVE_CONFIG_H) && defined(_X_DEPRECATED)
#define HAVE_XKBKEYCODETOKEYSYM 1
#endif
#ifdef HAVE_XKBKEYCODETOKEYSYM
#include <X11/XKBlib.h>
#endif
#include <X11/Xutil.h>
#include <stdio.h>
#include <ctype.h>
#include <xutf8.h>
#include <data.h>
#include <fontutils.h>
#include <xstrings.h>
#include <xtermcap.h>
/*
* Xutil.h has no macro to check for the complete set of function- and
* modifier-keys that might be returned. Fake it.
*/
#ifdef XK_ISO_Lock
#define IsPredefinedKey(n) ((n) >= XK_ISO_Lock && (n) <= XK_Delete)
#else
#define IsPredefinedKey(n) ((n) >= XK_BackSpace && (n) <= XK_Delete)
#endif
#ifdef XK_ISO_Left_Tab
#define IsTabKey(n) ((n) == XK_Tab || (n) == XK_ISO_Left_Tab)
#else
#define IsTabKey(n) ((n) == XK_Tab)
#endif
#ifndef IsPrivateKeypadKey
#define IsPrivateKeypadKey(k) (0)
#endif
#define IsBackarrowToggle(keyboard, keysym, state) \
((((keyboard->flags & MODE_DECBKM) == 0) \
^ ((state & ControlMask) != 0)) \
&& (keysym == XK_BackSpace))
#define MAP(from, to) case from: result = to; break
#define Masked(value,mask) ((value) & (unsigned) (~(mask)))
#define KEYSYM_FMT "0x%04lX" /* simplify matching <X11/keysymdef.h> */
#define TEK4014_GIN(tw) (tw != 0 && TekScreenOf(tw)->TekGIN)
typedef struct {
KeySym keysym;
Bool is_fkey;
int nbytes;
#define STRBUFSIZE 500
char strbuf[STRBUFSIZE];
} KEY_DATA;
static
const char kypd_num[] = " XXXXXXXX\tXXX\rXXXxxxxXXXXXXXXXXXXXXXXXXXXX*+,-./0123456789XXX=";
/* 0123456789 abc def0123456789abcdef0123456789abcdef0123456789abcd */
static
const char kypd_apl[] = " ABCDEFGHIJKLMNOPQRSTUVWXYZ??????abcdefghijklmnopqrstuvwxyzXXX";
/* 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcd */
static
const char curfinal[] = "HDACB FE";
static int decfuncvalue(KEY_DATA *);
static void sunfuncvalue(ANSI *, KEY_DATA *);
static void hpfuncvalue(ANSI *, KEY_DATA *);
static void scofuncvalue(ANSI *, KEY_DATA *);
static void
AdjustAfterInput(XtermWidget xw)
{
TScreen *screen = TScreenOf(xw);
if (screen->scrollkey && screen->topline != 0)
WindowScroll(xw, 0, False);
if (screen->marginbell) {
int col = screen->max_col - screen->nmarginbell;
if (screen->bellArmed >= 0) {
if (screen->bellArmed == screen->cur_row) {
if (screen->cur_col >= col) {
Bell(xw, XkbBI_MarginBell, 0);
screen->bellArmed = -1;
}
} else {
screen->bellArmed =
screen->cur_col < col ? screen->cur_row : -1;
}
} else if (screen->cur_col < col)
screen->bellArmed = screen->cur_row;
}
}
/*
* Return true if the key is on the editing keypad. This overlaps with
* IsCursorKey() and IsKeypadKey() and must be tested before those macros to
* distinguish it from them.
*
* VT220 emulation uses the VT100 numeric keypad as well as a 6-key
* editing keypad. Here's a picture of the VT220 editing keypad:
* +--------+--------+--------+
* | Find | Insert | Remove |
* +--------+--------+--------+
* | Select | Prev | Next |
* +--------+--------+--------+
*
* and the similar Sun and PC keypads:
* +--------+--------+--------+
* | Insert | Home | PageUp |
* +--------+--------+--------+
* | Delete | End | PageDn |
* +--------+--------+--------+
*/
static Bool
IsEditKeypad(XtermWidget xw, KeySym keysym)
{
Bool result;
switch (keysym) {
case XK_Delete:
result = !xtermDeleteIsDEL(xw);
break;
case XK_Prior:
case XK_Next:
case XK_Insert:
case XK_Find:
case XK_Select:
#ifdef DXK_Remove
case DXK_Remove:
#endif
result = True;
break;
default:
result = False;
break;
}
return result;
}
/*
* Editing-keypad, plus other editing keys which are not included in the
* other macros.
*/
static Bool
IsEditFunctionKey(XtermWidget xw, KeySym keysym)
{
Bool result;
switch (keysym) {
#ifdef XK_KP_Delete
case XK_KP_Delete: /* editing key on numeric keypad */
case XK_KP_Insert: /* editing key on numeric keypad */
#endif
#ifdef XK_ISO_Left_Tab
case XK_ISO_Left_Tab:
#endif
result = True;
break;
default:
result = IsEditKeypad(xw, keysym);
break;
}
return result;
}
#if OPT_MOD_FKEYS
#define IS_CTRL(n) ((n) < ANSI_SPA || ((n) >= 0x7f && (n) <= 0x9f))
/*
* Return true if the keysym corresponds to one of the control characters,
* or one of the common ASCII characters that is combined with control to
* make a control character.
*/
static Bool
IsControlInput(KEY_DATA * kd)
{
return ((kd->keysym) >= 0x40 && (kd->keysym) <= 0x7f);
}
static Bool
IsControlOutput(KEY_DATA * kd)
{
return IS_CTRL(kd->keysym);
}
/*
* X "normally" has some built-in translations, which the user may want to
* suppress when processing the modifyOtherKeys resource. In particular, the
* control modifier applied to some of the keyboard digits gives results for
* control characters.
*
* control 2 0 NUL
* control SPC 0 NUL
* control @ 0 NUL
* control ` 0 NUL
* control 3 0x1b ESC
* control 4 0x1c FS
* control \ 0x1c FS
* control 5 0x1d GS
* control 6 0x1e RS
* control ^ 0x1e RS
* control ~ 0x1e RS
* control 7 0x1f US
* control / 0x1f US
* control _ 0x1f US
* control 8 0x7f DEL
*
* It is possible that some other keyboards do not work for these combinations,
* but they do work with modifyOtherKeys=2 for the US keyboard:
*
* control ` 0 NUL
* control [ 0x1b ESC
* control \ 0x1c FS
* control ] 0x1d GS
* control ? 0x7f DEL
*/
static Bool
IsControlAlias(KEY_DATA * kd)
{
Bool result = False;
if (kd->nbytes == 1) {
result = IS_CTRL(CharOf(kd->strbuf[0]));
}
return result;
}
/*
* If we are in the non-VT220/VT52 keyboard state, allow modifiers to add a
* parameter to the function-key control sequences.
*
* Note that we generally cannot capture the Shift-modifier for the numeric
* keypad since this is commonly used to act as a type of NumLock, e.g.,
* making the keypad send "7" (actually XK_KP_7) where the unshifted code
* would be Home (XK_KP_Home). The other modifiers work, subject to the
* usual window-manager assignments.
*/
#if OPT_SUNPC_KBD
#define LegacyAllows(code) (!is_legacy || (code & xw->keyboard.modify_now.allow_keys) != 0)
#else
#define LegacyAllows(code) True
#endif
static Bool
allowModifierParm(XtermWidget xw, KEY_DATA * kd)
{
TKeyboard *keyboard = &(xw->keyboard);
int is_legacy = (keyboard->type == keyboardIsLegacy);
Bool result = False;
#if OPT_SUNPC_KBD
if (keyboard->type == keyboardIsVT220)
is_legacy = True;
#endif
#if OPT_VT52_MODE
if (TScreenOf(xw)->vtXX_level != 0)
#endif
{
if (IsCursorKey(kd->keysym) || IsEditFunctionKey(xw, kd->keysym)) {
result = LegacyAllows(2);
} else if (IsKeypadKey(kd->keysym)) {
result = LegacyAllows(1);
} else if (IsFunctionKey(kd->keysym)) {
result = LegacyAllows(4);
} else if (IsMiscFunctionKey(kd->keysym)) {
result = LegacyAllows(8);
}
}
if (xw->keyboard.modify_now.other_keys != 0) {
result = True;
}
return result;
}
/*
* Modifier codes:
* None 1
* Shift 2 = 1(None)+1(Shift)
* Alt 3 = 1(None)+2(Alt)
* Alt+Shift 4 = 1(None)+1(Shift)+2(Alt)
* Ctrl 5 = 1(None)+4(Ctrl)
* Ctrl+Shift 6 = 1(None)+1(Shift)+4(Ctrl)
* Ctrl+Alt 7 = 1(None)+2(Alt)+4(Ctrl)
* Ctrl+Alt+Shift 8 = 1(None)+1(Shift)+2(Alt)+4(Ctrl)
* Meta 9 = 1(None)+8(Meta)
* Meta+Shift 10 = 1(None)+8(Meta)+1(Shift)
* Meta+Alt 11 = 1(None)+8(Meta)+2(Alt)
* Meta+Alt+Shift 12 = 1(None)+8(Meta)+1(Shift)+2(Alt)
* Meta+Ctrl 13 = 1(None)+8(Meta)+4(Ctrl)
* Meta+Ctrl+Shift 14 = 1(None)+8(Meta)+1(Shift)+4(Ctrl)
* Meta+Ctrl+Alt 15 = 1(None)+8(Meta)+2(Alt)+4(Ctrl)
* Meta+Ctrl+Alt+Shift 16 = 1(None)+8(Meta)+1(Shift)+2(Alt)+4(Ctrl)
*/
unsigned
xtermParamToState(XtermWidget xw, unsigned param)
{
unsigned result = 0;
#if OPT_NUM_LOCK
if (param > MOD_NONE) {
if ((param - MOD_NONE) & MOD_SHIFT)
UIntSet(result, ShiftMask);
if ((param - MOD_NONE) & MOD_CTRL)
UIntSet(result, ControlMask);
if ((param - MOD_NONE) & MOD_ALT)
UIntSet(result, xw->work.alt_mods);
if ((param - MOD_NONE) & MOD_META)
UIntSet(result, xw->work.meta_mods);
}
#else
(void) xw;
(void) param;
#endif
TRACE(("xtermParamToState(%d) %s%s%s%s -> %#x\n", param,
MODIFIER_NAME(param, MOD_SHIFT),
MODIFIER_NAME(param, MOD_ALT),
MODIFIER_NAME(param, MOD_CTRL),
MODIFIER_NAME(param, MOD_META),
result));
return result;
}
unsigned
xtermStateToParam(XtermWidget xw, unsigned state)
{
unsigned modify_parm = MOD_NONE;
TRACE(("xtermStateToParam %#x\n", state));
#if OPT_NUM_LOCK
if (state & ShiftMask) {
modify_parm += MOD_SHIFT;
UIntClr(state, ShiftMask);
}
if (state & ControlMask) {
modify_parm += MOD_CTRL;
UIntClr(state, ControlMask);
}
if ((state & xw->work.alt_mods) != 0) {
modify_parm += MOD_ALT;
UIntClr(state, xw->work.alt_mods);
}
if ((state & xw->work.meta_mods) != 0) {
modify_parm += MOD_META;
/* UIntClr(state, xw->work.meta_mods); */
}
if (modify_parm == MOD_NONE)
modify_parm = 0;
#else
(void) xw;
(void) state;
#endif
TRACE(("...xtermStateToParam %d%s%s%s%s\n", modify_parm,
MODIFIER_NAME(modify_parm, MOD_SHIFT),
MODIFIER_NAME(modify_parm, MOD_ALT),
MODIFIER_NAME(modify_parm, MOD_CTRL),
MODIFIER_NAME(modify_parm, MOD_META)));
return modify_parm;
}
#define computeMaskedModifier(xw, state, mask) \
xtermStateToParam(xw, Masked(state, mask))
#if OPT_NUM_LOCK
static unsigned
filterAltMeta(unsigned result, unsigned mask, Bool enable, KEY_DATA * kd)
{
if ((result & mask) != 0) {
/*
* metaSendsEscape makes the meta key independent of
* modifyOtherKeys.
*/
if (enable) {
result &= ~mask;
}
/*
* A bare meta-modifier is independent of modifyOtherKeys. If it
* is combined with other modifiers, make it depend.
*/
if ((result & ~(mask)) == 0) {
result &= ~mask;
}
/*
* Check for special cases of control+meta which are used by some
* applications, e.g., emacs.
*/
if ((IsControlInput(kd)
|| IsControlOutput(kd))
&& (result & ControlMask) != 0) {
result &= ~(mask | ControlMask);
}
if (kd->keysym == XK_Return || kd->keysym == XK_Tab) {
result &= ~(mask | ControlMask);
}
}
return result;
}
#endif /* OPT_NUM_LOCK */
/*
* Single characters (not function-keys) are allowed fewer modifiers when
* interpreting modifyOtherKeys due to pre-existing associations with some
* modifiers.
*/
static unsigned
allowedCharModifiers(XtermWidget xw, unsigned state, KEY_DATA * kd)
{
#if OPT_NUM_LOCK
unsigned a_or_m = (state & (xw->work.meta_mods | xw->work.alt_mods));
#else
unsigned a_or_m = 0;
#endif
/*
* Start by limiting the result to the modifiers we might want to use.
*/
unsigned result = (state & (ControlMask
| ShiftMask
| a_or_m));
/*
* If modifyOtherKeys is off or medium (0 or 1), moderate its effects by
* excluding the common cases for modifiers.
*/
if (xw->keyboard.modify_now.other_keys <= 1) {
if (IsControlInput(kd)
&& Masked(result, ControlMask) == 0) {
/* These keys are already associated with the control-key */
if (xw->keyboard.modify_now.other_keys == 0) {
UIntClr(result, ControlMask);
}
} else if (kd->keysym == XK_Tab || kd->keysym == XK_Return) {
/* EMPTY */ ;
} else if (IsControlAlias(kd)) {
/* Things like "^_" work here... */
if (Masked(result, (ControlMask | ShiftMask)) == 0) {
result = 0;
}
} else if (!IsControlOutput(kd) && !IsPredefinedKey(kd->keysym)) {
/* Printable keys are already associated with the shift-key */
if (!(result & ControlMask)) {
UIntClr(result, ShiftMask);
}
}
#if OPT_NUM_LOCK
result = filterAltMeta(result,
xw->work.meta_mods,
TScreenOf(xw)->meta_sends_esc, kd);
if (TScreenOf(xw)->alt_is_not_meta) {
result = filterAltMeta(result,
xw->work.alt_mods,
TScreenOf(xw)->alt_sends_esc, kd);
}
#endif
}
TRACE(("...allowedCharModifiers(state=%u" FMT_MODIFIER_NAMES
", ch=" KEYSYM_FMT ") ->"
"%u" FMT_MODIFIER_NAMES "\n",
state, ARG_MODIFIER_NAMES(state), kd->keysym,
result, ARG_MODIFIER_NAMES(result)));
return result;
}
/*
* Decide if we should generate a special escape sequence for "other" keys
* than cursor-, function-keys, etc., as per the modifyOtherKeys resource.
*/
static Bool
ModifyOtherKeys(XtermWidget xw,
unsigned state,
KEY_DATA * kd,
unsigned modify_parm)
{
TKeyboard *keyboard = &(xw->keyboard);
Bool result = False;
/*
* Exclude the keys already covered by a modifier.
*/
if (kd->is_fkey
|| IsEditFunctionKey(xw, kd->keysym)
|| IsKeypadKey(kd->keysym)
|| IsCursorKey(kd->keysym)
|| IsPFKey(kd->keysym)
|| IsMiscFunctionKey(kd->keysym)
|| IsPrivateKeypadKey(kd->keysym)) {
result = False;
} else if (modify_parm != 0) {
if (IsBackarrowToggle(keyboard, kd->keysym, state)) {
kd->keysym = XK_Delete;
UIntClr(state, ControlMask);
}
if (!IsPredefinedKey(kd->keysym)) {
state = allowedCharModifiers(xw, state, kd);
}
if (state != 0) {
switch (keyboard->modify_now.other_keys) {
default:
break;
case 1:
switch (kd->keysym) {
case XK_BackSpace:
case XK_Delete:
result = False;
break;
#ifdef XK_ISO_Left_Tab
case XK_ISO_Left_Tab:
if (computeMaskedModifier(xw, state, ShiftMask))
result = True;
break;
#endif
case XK_Return:
case XK_Tab:
result = (modify_parm != 0);
break;
default:
if (IsControlInput(kd)) {
if (state == ControlMask || state == ShiftMask) {
result = False;
} else {
result = (modify_parm != 0);
}
} else if (IsControlAlias(kd)) {
if (state == ShiftMask)
result = False;
else if (computeMaskedModifier(xw, state, ControlMask)) {
result = True;
}
} else {
result = True;
}
break;
}
break;
case 2:
switch (kd->keysym) {
case XK_BackSpace:
/* strip ControlMask as per IsBackarrowToggle() */
if (computeMaskedModifier(xw, state, ControlMask))
result = True;
break;
case XK_Delete:
result = (xtermStateToParam(xw, state) != 0);
break;
#ifdef XK_ISO_Left_Tab
case XK_ISO_Left_Tab:
if (computeMaskedModifier(xw, state, ShiftMask))
result = True;
break;
#endif
case XK_Escape:
case XK_Return:
case XK_Tab:
result = (modify_parm != 0);
break;
default:
if (IsControlInput(kd)) {
result = True;
} else if (state == ShiftMask && kd->keysym == ' ') {
result = True;
} else if (computeMaskedModifier(xw, state, ShiftMask)) {
result = True;
}
break;
}
break;
}
}
}
TRACE(("...ModifyOtherKeys(%d,%d) %s\n",
keyboard->modify_now.other_keys,
modify_parm,
BtoS(result)));
return result;
}
#define APPEND_PARM(number) \
reply->a_param[reply->a_nparam] = (ParmType) number; \
reply->a_nparam++
/*
* Function-key code 27 happens to not be used in the vt220-style encoding.
* xterm uses this to represent modified non-function-keys such as control/+ in
* the Sun/PC keyboard layout. See the modifyOtherKeys resource in the manpage
* for more information.
*/
static Bool
modifyOtherKey(ANSI *reply, int input_char, unsigned modify_parm, int format_keys)
{
Bool result = False;
if (input_char >= 0) {
reply->a_type = ANSI_CSI;
if (format_keys) {
APPEND_PARM(input_char);
APPEND_PARM(modify_parm);
reply->a_final = 'u';
} else {
APPEND_PARM(27);
APPEND_PARM(modify_parm);
APPEND_PARM(input_char);
reply->a_final = '~';
}
result = True;
}
return result;
}
static void
modifyCursorKey(ANSI *reply, int modify, unsigned *modify_parm)
{
if (*modify_parm != 0) {
if (modify < 0) {
*modify_parm = 0;
}
if (modify > 0) {
reply->a_type = ANSI_CSI; /* SS3 should not have params */
}
if (modify > 1 && reply->a_nparam == 0) {
APPEND_PARM(1); /* force modifier to 2nd param */
}
if (modify > 2) {
reply->a_pintro = '>'; /* mark this as "private" */
}
}
}
#else
#define modifyCursorKey(reply, modify, parm) /* nothing */
#endif /* OPT_MOD_FKEYS */
#if OPT_SUNPC_KBD
/*
* If we have told xterm that our keyboard is really a Sun/PC keyboard, this is
* enough to make a reasonable approximation to DEC vt220 numeric and editing
* keypads.
*/
static KeySym
TranslateFromSUNPC(KeySym keysym)
{
/* *INDENT-OFF* */
static struct {
KeySym before, after;
} table[] = {
#ifdef DXK_Remove
{ XK_Delete, DXK_Remove },
#endif
{ XK_Home, XK_Find },
{ XK_End, XK_Select },
#ifdef XK_KP_Home
{ XK_Delete, XK_KP_Decimal },
{ XK_KP_Delete, XK_KP_Decimal },
{ XK_KP_Insert, XK_KP_0 },
{ XK_KP_End, XK_KP_1 },
{ XK_KP_Down, XK_KP_2 },
{ XK_KP_Next, XK_KP_3 },
{ XK_KP_Left, XK_KP_4 },
{ XK_KP_Begin, XK_KP_5 },
{ XK_KP_Right, XK_KP_6 },
{ XK_KP_Home, XK_KP_7 },
{ XK_KP_Up, XK_KP_8 },
{ XK_KP_Prior, XK_KP_9 },
#endif
};
/* *INDENT-ON* */
unsigned n;
for (n = 0; n < sizeof(table) / sizeof(table[0]); n++) {
if (table[n].before == keysym) {
TRACE(("...Input keypad before was " KEYSYM_FMT "\n", keysym));
keysym = table[n].after;
TRACE(("...Input keypad changed to " KEYSYM_FMT "\n", keysym));
break;
}
}
return keysym;
}
#endif /* OPT_SUNPC_KBD */
#define VT52_KEYPAD \
if_OPT_VT52_MODE(screen,{ \
reply.a_type = ANSI_ESC; \
reply.a_pintro = '?'; \
})
#define VT52_CURSOR_KEYS \
if_OPT_VT52_MODE(screen,{ \
reply.a_type = ANSI_ESC; \
})
#undef APPEND_PARM
#define APPEND_PARM(number) \
reply.a_param[reply.a_nparam] = (ParmType) number, \
reply.a_nparam++
#if OPT_MOD_FKEYS
#define MODIFIER_PARM \
if (modify_parm != 0) APPEND_PARM(modify_parm)
#else
#define MODIFIER_PARM /*nothing */
#endif
/*
* Determine if we use the \E[3~ sequence for Delete, or the legacy ^?. We
* maintain the delete_is_del value as 3 states: unspecified(2), true and
* false. If unspecified, it is handled differently according to whether the
* legacy keyboard support is enabled, or if xterm emulates a VT220.
*
* Once the user (or application) has specified delete_is_del via resource
* setting, popup menu or escape sequence, it overrides the keyboard type
* rather than the reverse.
*/
Bool
xtermDeleteIsDEL(XtermWidget xw)
{
Bool result = True;
if (xw->keyboard.type == keyboardIsDefault
|| xw->keyboard.type == keyboardIsVT220)
result = (TScreenOf(xw)->delete_is_del == True);
if (xw->keyboard.type == keyboardIsLegacy)
result = (TScreenOf(xw)->delete_is_del != False);
TRACE(("xtermDeleteIsDEL(%d/%d) = %d\n",
xw->keyboard.type,
TScreenOf(xw)->delete_is_del,
result));
return result;
}
static Boolean
lookupKeyData(KEY_DATA * kd, XtermWidget xw, XKeyEvent *event)
{
TScreen *screen = TScreenOf(xw);
Boolean result = True;
#if OPT_INPUT_METHOD
#if OPT_MOD_FKEYS
TKeyboard *keyboard = &(xw->keyboard);
#endif
#endif
(void) screen;
TRACE(("%s %#x\n", visibleEventType(event->type), event->keycode));
kd->keysym = 0;
kd->is_fkey = False;
#if OPT_TCAP_QUERY
if (screen->tc_query_code >= 0) {
kd->keysym = (KeySym) screen->tc_query_code;
kd->is_fkey = screen->tc_query_fkey;
if (kd->keysym != XK_BackSpace) {
kd->nbytes = 0;
kd->strbuf[0] = 0;
} else {
kd->nbytes = 1;
kd->strbuf[0] = 8;
}
} else
#endif
{
#if OPT_INPUT_METHOD
TInput *input = lookupTInput(xw, (Widget) xw);
if (input && input->xic) {
Status status_return;
#if OPT_WIDE_CHARS
if (screen->utf8_mode) {
kd->nbytes = Xutf8LookupString(input->xic, event,
kd->strbuf, (int) sizeof(kd->strbuf),
&(kd->keysym), &status_return);
} else
#endif
{
kd->nbytes = XmbLookupString(input->xic, event,
kd->strbuf, (int) sizeof(kd->strbuf),
&(kd->keysym), &status_return);
}
#if OPT_MOD_FKEYS
/*
* Fill-in some code useful with IsControlAlias():
*/
if (status_return == XLookupBoth
&& kd->nbytes <= 1
&& !IsPredefinedKey(kd->keysym)
&& (keyboard->modify_now.other_keys > 1)
&& !IsControlInput(kd)) {
kd->nbytes = 1;
kd->strbuf[0] = (char) kd->keysym;
}
#endif /* OPT_MOD_FKEYS */
} else
#endif /* OPT_INPUT_METHOD */
{
static XComposeStatus compose_status =
{NULL, 0};
kd->nbytes = XLookupString(event,
kd->strbuf, (int) sizeof(kd->strbuf),
&(kd->keysym), &compose_status);
}
kd->is_fkey = IsFunctionKey(kd->keysym);
}
return result;
}
void
Input(XtermWidget xw,
XKeyEvent *event,
Bool eightbit)
{
Char *string;
TKeyboard *keyboard = &(xw->keyboard);
TScreen *screen = TScreenOf(xw);
int j;
int key = False;
ANSI reply;
int dec_code;
unsigned modify_parm = 0;
int keypad_mode = ((keyboard->flags & MODE_DECKPAM) != 0);
unsigned evt_state = event->state;
unsigned mod_state;
KEY_DATA kd;
/* Ignore characters typed at the keyboard */
if (keyboard->flags & MODE_KAM)
return;
lookupKeyData(&kd, xw, event);
memset(&reply, 0, sizeof(reply));
TRACE(("Input(%d,%d) keysym "
KEYSYM_FMT
", %d:'%s'%s" FMT_MODIFIER_NAMES "%s%s%s%s%s%s\n",
screen->cur_row, screen->cur_col,
kd.keysym,
kd.nbytes,
visibleChars((Char *) kd.strbuf,
((kd.nbytes > 0)
? (unsigned) kd.nbytes
: 0)),
ARG_MODIFIER_NAMES(evt_state),
eightbit ? " 8bit" : " 7bit",
IsKeypadKey(kd.keysym) ? " KeypadKey" : "",
IsCursorKey(kd.keysym) ? " CursorKey" : "",
IsPFKey(kd.keysym) ? " PFKey" : "",
kd.is_fkey ? " FKey" : "",
IsMiscFunctionKey(kd.keysym) ? " MiscFKey" : "",
IsEditFunctionKey(xw, kd.keysym) ? " EditFkey" : ""));
#if OPT_SUNPC_KBD
/*
* DEC keyboards don't have keypad(+), but do have keypad(,) instead.
* Other (Sun, PC) keyboards commonly have keypad(+), but no keypad(,)
* - it's a pain for users to work around.
*/
if (keyboard->type == keyboardIsVT220
&& (evt_state & ShiftMask) == 0) {
if (kd.keysym == XK_KP_Add) {
kd.keysym = XK_KP_Separator;
UIntClr(evt_state, ShiftMask);
TRACE(("...Input keypad(+), change keysym to "
KEYSYM_FMT
"\n",
kd.keysym));
}
if ((evt_state & ControlMask) != 0
&& kd.keysym == XK_KP_Separator) {
kd.keysym = XK_KP_Subtract;
UIntClr(evt_state, ControlMask);
TRACE(("...Input control/keypad(,), change keysym to "
KEYSYM_FMT
"\n",
kd.keysym));
}
}
#endif
/*
* The keyboard tables may give us different keypad codes according to
* whether NumLock is pressed. Use this check to simplify the process
* of determining whether we generate an escape sequence for a keypad
* key, or force it to the value kypd_num[]. There is no fixed
* modifier for this feature, so we assume that it is the one assigned
* to the NumLock key.
*
* This check used to try to return the contents of strbuf, but that
* does not work properly when a control modifier is given (trash is
* returned in the buffer in some cases -- perhaps an X bug).
*/
#if OPT_NUM_LOCK
if (kd.nbytes == 1
&& IsKeypadKey(kd.keysym)
&& xw->misc.real_NumLock
&& (xw->work.num_lock & evt_state) != 0) {
keypad_mode = 0;
TRACE(("...Input num_lock, force keypad_mode off\n"));
}
#endif
#if OPT_MOD_FKEYS
if (evt_state != 0
&& allowModifierParm(xw, &kd)) {
modify_parm = xtermStateToParam(xw, evt_state);
}
/*
* Shift-tab is often mapped to XK_ISO_Left_Tab which is classified as
* IsEditFunctionKey(), and the conversion does not produce any bytes.
* Check for this special case so we have data when handling the
* modifyOtherKeys resource.
*/
if (keyboard->modify_now.other_keys > 1) {
if (IsTabKey(kd.keysym) && kd.nbytes == 0) {
kd.nbytes = 1;
kd.strbuf[0] = '\t';
}
}
#ifdef XK_ISO_Left_Tab
else if (IsTabKey(kd.keysym) && kd.nbytes <= 1) {
if (allowModifierParm(xw, &kd)) {