/*
* Input an escaped token. Possible escape chars are single-quote,
* double-quote and backslash. Only the first is a valid escape for
* rc; the others are just inserted into the receiving buffer.
*/
int
escapetoken(Biobuf *bp, Bufblock *buf, int preserve, int esc)
{
int c, line;
if(esc != '\'')
return 1;
line = mkinline;
while((c = nextrune(bp, 0)) > 0){
if(c == '\''){
if(preserve)
rinsert(buf, c);
c = Bgetrune(bp);
if (c < 0)
break;
if(c != '\''){
Bungetrune(bp);
return 1;
}
}
rinsert(buf, c);
}
SYNERR(line); fprint(2, "missing closing %c\n", esc);
return 0;
}
void copy_first() {
if (valid) {
strcpy(text, valid->text);
while (text[cursor] != '\0' && cursor < MAX_LEN - 1)
cursor = nextrune(+1);
update_valid_options();
}
}
static int lex(struct cstate *g)
{
int quoted = nextrune(g);
if (quoted) {
switch (g->yychar) {
case 'b': return L_WORD;
case 'B': return L_NWORD;
case 'd': newcclass(g); addranges_d(g); return L_CCLASS;
case 's': newcclass(g); addranges_s(g); return L_CCLASS;
case 'w': newcclass(g); addranges_w(g); return L_CCLASS;
case 'D': newcclass(g); addranges_d(g); return L_NCCLASS;
case 'S': newcclass(g); addranges_s(g); return L_NCCLASS;
case 'W': newcclass(g); addranges_w(g); return L_NCCLASS;
case '0': g->yychar = 0; return L_CHAR;
}
if (g->yychar >= '0' && g->yychar <= '9') {
g->yychar -= '0';
if (*g->source >= '0' && *g->source <= '9')
g->yychar = g->yychar * 10 + *g->source++ - '0';
return L_REF;
}
return L_CHAR;
}
switch (g->yychar) {
case 0:
case '$': case ')': case '*': case '+':
case '.': case '?': case '^': case '|':
return g->yychar;
}
if (g->yychar == '{')
return lexcount(g);
if (g->yychar == '[')
return lexclass(g);
if (g->yychar == '(') {
if (g->source[0] == '?') {
if (g->source[1] == ':') {
g->source += 2;
return L_NC;
}
if (g->source[1] == '=') {
g->source += 2;
return L_PLA;
}
if (g->source[1] == '!') {
g->source += 2;
return L_NLA;
}
}
return '(';
}
return L_CHAR;
}
/*
* Assemble a line skipping blank lines, comments, and eliding
* escaped newlines
*/
int
assline(Biobuf *bp, Bufblock *buf)
{
int c;
int lastc;
buf->current=buf->start;
while ((c = nextrune(bp, 1)) >= 0){
switch(c)
{
case '\r': /* consumes CRs for Win95 */
continue;
case '\n':
if (buf->current != buf->start) {
insert(buf, 0);
return 1;
}
break; /* skip empty lines */
case '\\':
case '\'':
case '"':
rinsert(buf, c);
if (escapetoken(bp, buf, 1, c) == 0)
Exit();
break;
case '`':
if (bquote(bp, buf) == 0)
Exit();
break;
case '#':
lastc = '#';
while ((c = Bgetc(bp)) != '\n') {
if (c < 0)
goto eof;
if(c != '\r')
lastc = c;
}
mkinline++;
if (lastc == '\\')
break; /* propagate escaped newlines??*/
if (buf->current != buf->start) {
insert(buf, 0);
return 1;
}
break;
default:
rinsert(buf, c);
break;
}
}
eof:
insert(buf, 0);
return *buf->start != 0;
}
/*
* assemble a back-quoted shell command into a buffer
*/
static int
bquote(Biobuf *bp, Bufblock *buf)
{
int c, line, term, depth;
int start;
line = mkinline;
while((c = Bgetrune(bp)) == ' ' || c == '\t')
;
if(c == '{'){
term = '}'; /* rc style */
while((c = Bgetrune(bp)) == ' ' || c == '\t')
;
} else
term = '`'; /* sh style */
depth = 1;
start = buf->current-buf->start;
for(;c > 0; c = nextrune(bp, 0)){
if(c == '{' && term == '}')
depth++;
if(c == term && --depth == 0){
insert(buf, '\n');
insert(buf,0);
buf->current = buf->start+start;
execinit();
execsh(0, buf->current, buf, envy);
return 1;
}
if(c == '\n')
break;
if(c == '\'' || c == '"' || c == '\\'){
insert(buf, c);
if(!escapetoken(bp, buf, 1, c))
return 0;
continue;
}
rinsert(buf, c);
}
SYNERR(line);
fprint(2, "missing closing %c after `\n", term);
return 0;
}
/*
* Input an escaped token. Possible escape chars are single-quote,
* double-quote and backslash.
*/
static int
shescapetoken(Biobuf *bp, Bufblock *buf, int preserve, int esc)
{
int c, line;
if(esc == '\\') {
c = Bgetrune(bp);
if(c == '\r')
c = Bgetrune(bp);
if (c == '\n')
mkinline++;
rinsert(buf, c);
return 1;
}
line = mkinline;
while((c = nextrune(bp, 0)) >= 0){
if(c == esc){
if(preserve)
rinsert(buf, c);
return 1;
}
if(c == '\\') {
rinsert(buf, c);
c = Bgetrune(bp);
if(c == '\r')
c = Bgetrune(bp);
if (c < 0)
break;
if (c == '\n')
mkinline++;
}
rinsert(buf, c);
}
SYNERR(line); fprint(2, "missing closing %c\n", esc);
return 0;
}
void
keypress(XKeyEvent *ev) {
char buf[32];
int len;
KeySym ksym = NoSymbol;
Status status;
len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
if(status == XBufferOverflow)
return;
if(ev->state & ControlMask)
switch(ksym) {
case XK_a: ksym = XK_Home; break;
case XK_b: ksym = XK_Left; break;
case XK_c: ksym = XK_Escape; break;
case XK_d: ksym = XK_Delete; break;
case XK_e: ksym = XK_End; break;
case XK_f: ksym = XK_Right; break;
case XK_g: ksym = XK_Escape; break;
case XK_h: ksym = XK_BackSpace; break;
case XK_i: ksym = XK_Tab; break;
case XK_j: /* fallthrough */
case XK_J: ksym = XK_Return; break;
case XK_m: /* fallthrough */
case XK_M: ksym = XK_Return; break;
case XK_n: ksym = XK_Down; break;
case XK_p: ksym = XK_Up; break;
case XK_k: /* delete right */
text[cursor] = '\0';
match();
break;
case XK_u: /* delete left */
insert(NULL, 0 - cursor);
break;
case XK_w: /* delete word */
while(cursor > 0 && text[nextrune(-1)] == ' ')
insert(NULL, nextrune(-1) - cursor);
while(cursor > 0 && text[nextrune(-1)] != ' ' && text[nextrune(-1)] != '/')
insert(NULL, nextrune(-1) - cursor);
break;
case XK_y: /* paste selection */
XConvertSelection(dc->dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
utf8, utf8, win, CurrentTime);
return;
default:
return;
}
else if(ev->state & Mod1Mask)
switch(ksym) {
case XK_g: ksym = XK_Home; break;
case XK_G: ksym = XK_End; break;
case XK_h: ksym = XK_Up; break;
case XK_j: ksym = XK_Next; break;
case XK_k: ksym = XK_Prior; break;
case XK_l: ksym = XK_Down; break;
default:
return;
}
switch(ksym) {
default:
if(!iscntrl(*buf))
insert(buf, len);
break;
case XK_Delete:
if(text[cursor] == '\0')
return;
cursor = nextrune(+1);
/* fallthrough */
case XK_BackSpace:
if(cursor == 0)
return;
insert(NULL, nextrune(-1) - cursor);
break;
case XK_End:
if(text[cursor] != '\0') {
cursor = strlen(text);
break;
}
if(next) {
/* jump to end of list and position items in reverse */
curr = matchend;
calcoffsets();
curr = prev;
calcoffsets();
while(next && (curr = curr->right))
calcoffsets();
}
sel = matchend;
break;
case XK_Escape:
ret = EXIT_FAILURE;
running = False;
case XK_Home:
if(sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case XK_Left:
if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
cursor = nextrune(-1);
break;
}
if(lines > 0)
return;
/* fallthrough */
case XK_Up:
if(sel && sel->left && (sel = sel->left)->right == curr) {
curr = prev;
calcoffsets();
}
break;
case XK_Next:
if(!next)
return;
sel = curr = next;
calcoffsets();
break;
case XK_Prior:
if(!prev)
return;
sel = curr = prev;
calcoffsets();
break;
case XK_Return:
case XK_KP_Enter:
puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
ret = EXIT_SUCCESS;
running = False;
case XK_Right:
if(text[cursor] != '\0') {
cursor = nextrune(+1);
break;
}
if(lines > 0)
return;
/* fallthrough */
case XK_Down:
if(sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof text);
cursor = strlen(text);
match();
break;
}
drawmenu();
}
void handle_key(XKeyEvent ke) {
FcChar8 buf[32];
int len, n;
KeySym keysym = NoSymbol;
Status status;
option *o;
len = XmbLookupString(xic, &ke, buf, sizeof(buf),
&keysym, &status);
if (status == XBufferOverflow)
return;
if (ke.state & ControlMask) {
switch(keysym) {
case XK_a:
keysym = XK_Home;
break;
case XK_e:
keysym = XK_End;
break;
case XK_p:
keysym = XK_Up;
break;
case XK_n:
keysym = XK_Down;
break;
case XK_f:
keysym = XK_Right;
break;
case XK_b:
keysym = XK_Left;
break;
case XK_d:
keysym = XK_Delete;
break;
case XK_bracketleft:
keysym = XK_Escape;
break;
case XK_k:
text[cursor] = '\0';
break;
case XK_u:
for (n = cursor; cursor < MAX_LEN; cursor++)
text[cursor - n] = text[cursor];
cursor = 0;
update_valid_options();
return;
}
}
if (text_input) {
switch(keysym) {
default:
if (!iscntrl(*buf)) {
insert(buf, len);
update_valid_options();
}
break;
case XK_Delete:
if (text[cursor] == '\0') break;
cursor = nextrune(+1);
/* Fall through to backspace */
case XK_BackSpace:
if (cursor == 0)
exit(0);
insert(NULL, nextrune(-1) - cursor);
update_valid_options();
break;
case XK_Tab:
copy_first();
break;
case XK_Left:
if (cursor != 0)
cursor = nextrune(-1);
break;
case XK_Right:
if (text[cursor] != '\0')
cursor = nextrune(+1);
break;
case XK_Home:
cursor = 0;
break;
case XK_End:
while (text[cursor] != '\0')
cursor = nextrune(+1);
}
}
switch(keysym) {
case XK_Up:
if (valid->prev)
valid = valid->prev;
else
for (;
valid && valid->next;
valid = valid->next);
break;
case XK_Down:
if (valid->next)
valid = valid->next;
else
for (;
valid && valid->prev;
valid = valid->prev);
break;
case XK_Return:
finish();
break;
case XK_Escape:
exit(1);
break;
}
if (exit_on_one) {
for (n = 0, o = valid; o; o = o->next) n++;
if (n == 1) finish();
}
}
static int lexclass(struct cstate *g)
{
int type = L_CCLASS;
int quoted, havesave, havedash;
Rune save;
newcclass(g);
quoted = nextrune(g);
if (!quoted && g->yychar == '^') {
type = L_NCCLASS;
quoted = nextrune(g);
}
havesave = havedash = 0;
for (;;) {
if (g->yychar == 0)
die(g, "unterminated character class");
if (!quoted && g->yychar == ']')
break;
if (!quoted && g->yychar == '-') {
if (havesave) {
if (havedash) {
addrange(g, save, '-');
havesave = havedash = 0;
} else {
havedash = 1;
}
} else {
save = '-';
havesave = 1;
}
} else if (quoted && strchr("DSWdsw", g->yychar)) {
if (havesave) {
addrange(g, save, save);
if (havedash)
addrange(g, '-', '-');
}
switch (g->yychar) {
case 'd': addranges_d(g); break;
case 's': addranges_s(g); break;
case 'w': addranges_w(g); break;
case 'D': addranges_D(g); break;
case 'S': addranges_S(g); break;
case 'W': addranges_W(g); break;
}
havesave = havedash = 0;
} else {
if (quoted) {
if (g->yychar == 'b')
g->yychar = '\b';
else if (g->yychar == '0')
g->yychar = 0;
/* else identity escape */
}
if (havesave) {
if (havedash) {
addrange(g, save, g->yychar);
havesave = havedash = 0;
} else {
addrange(g, save, save);
save = g->yychar;
}
} else {
save = g->yychar;
havesave = 1;
}
}
quoted = nextrune(g);
}
if (havesave) {
addrange(g, save, save);
if (havedash)
addrange(g, '-', '-');
}
return type;
}
void keypress(Input *i, XKeyEvent *ev)
{
char buf[32];
int len;
KeySym ksym = NoSymbol;
Status status;
len = XmbLookupString(ic, ev, buf, sizeof(buf), &ksym, &status);
if (status == XBufferOverflow)
return;
if (ev->state & ControlMask)
switch (ksym) {
case XK_a: ksym = XK_Home; break;
case XK_b: ksym = XK_Left; break;
case XK_d: ksym = XK_Delete; break;
case XK_e: ksym = XK_End; break;
case XK_f: ksym = XK_Right; break;
case XK_h: ksym = XK_BackSpace; break;
case XK_i: ksym = XK_Tab; break;
case XK_j:
case XK_m: ksym = XK_Return; break;
default:
return;
}
else if (ev->state & Mod1Mask)
switch (ksym) {
case XK_g: ksym = XK_Home; break;
case XK_G: ksym = XK_End; break;
default:
return;
}
switch (ksym) {
default:
if (!iscntrl(*buf))
insert(i, buf, len);
break;
case XK_Delete:
if (i->text[i->cursor] == 0)
return;
i->cursor = nextrune(i, +1);
/* fallthrough */
case XK_BackSpace:
if (i->cursor == 0)
return;
insert(i, NULL, nextrune(i, -1) - i->cursor);
break;
case XK_Home:
if (i->cursor == 0)
return;
i->cursor = 0;
break;
case XK_End:
if (i->text[i->cursor] == 0)
return;
i->cursor = strlen(i->text);
break;
case XK_Left:
if (i->cursor == 0)
return;
i->cursor = nextrune(i, -1);
break;
case XK_Right:
if (i->text[i->cursor] == 0)
return;
i->cursor = nextrune(i, +1);
break;
case XK_Return:
case XK_KP_Enter:
if (!i->next) {
running = False;
return;
}
/* fallthrough */
case XK_Tab:
XSetInputFocus(dpy, i->next ? i->next->win : inputs->win,
RevertToPointerRoot, CurrentTime);
return;
}
drawinput(i);
}
static int
run(void) {
char buf[32];
char c;
for (;;) {
xread(0, &c, 1);
memset(buf, '\0', sizeof buf);
buf[0] = c;
switch_top:
switch(c) {
case CONTROL('['):
xread(0, &c, 1);
esc_switch_top:
switch(c) {
case CONTROL('['): /* ESC, need to press twice due to console limitations */
c = CONTROL('C');
goto switch_top;
case '[':
xread(0, &c, 1);
switch(c) {
case '1': /* Home */
case '7':
case 'H':
if (c != 'H') xread(0, &c, 1); /* Remove trailing '~' from stdin */
c = CONTROL('A');
goto switch_top;
case '2': /* Insert */
xread(0, &c, 1); /* Remove trailing '~' from stdin */
c = CONTROL('Y');
goto switch_top;
case '3': /* Delete */
xread(0, &c, 1); /* Remove trailing '~' from stdin */
c = CONTROL('D');
goto switch_top;
case '4': /* End */
case '8':
case 'F':
if (c != 'F') xread(0, &c, 1); /* Remove trailing '~' from stdin */
c = CONTROL('E');
goto switch_top;
case '5': /* PageUp */
xread(0, &c, 1); /* Remove trailing '~' from stdin */
c = CONTROL('V');
goto switch_top;
case '6': /* PageDown */
xread(0, &c, 1); /* Remove trailing '~' from stdin */
c = 'v';
goto esc_switch_top;
case 'A': /* Up arrow */
c = CONTROL('P');
goto switch_top;
case 'B': /* Down arrow */
c = CONTROL('N');
goto switch_top;
case 'C': /* Right arrow */
c = CONTROL('F');
goto switch_top;
case 'D': /* Left arrow */
c = CONTROL('B');
goto switch_top;
}
break;
case 'b':
while (cursor > 0 && text[nextrune(-1)] == ' ')
cursor = nextrune(-1);
while (cursor > 0 && text[nextrune(-1)] != ' ')
cursor = nextrune(-1);
break;
case 'f':
while (text[cursor] != '\0' && text[nextrune(+1)] == ' ')
cursor = nextrune(+1);
if (text[cursor] != '\0') {
do {
cursor = nextrune(+1);
} while (text[cursor] != '\0' && text[cursor] != ' ');
}
break;
case 'd':
while (text[cursor] != '\0' && text[nextrune(+1)] == ' ') {
cursor = nextrune(+1);
insert(NULL, nextrune(-1) - cursor);
}
if (text[cursor] != '\0') {
do {
cursor = nextrune(+1);
insert(NULL, nextrune(-1) - cursor);
} while (text[cursor] != '\0' && text[cursor] != ' ');
}
break;
case 'v':
if (!next)
break;
sel = curr = next;
calcoffsets();
break;
default:
break;
}
break;
case CONTROL('C'):
return EXIT_FAILURE;
case CONTROL('M'): /* Return */
case CONTROL('J'):
if (sel) strncpy(text, sel->text, sizeof(text)-1); /* Complete the input first, when hitting return */
cursor = strlen(text);
match();
drawmenu();
/* fallthrough */
case CONTROL(']'):
case CONTROL('\\'): /* These are usually close enough to RET to replace Shift+RET, again due to console limitations */
puts(text);
return EXIT_SUCCESS;
case CONTROL('A'):
if (sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case CONTROL('E'):
if (text[cursor] != '\0') {
cursor = strlen(text);
break;
}
if (next) {
curr = matchend;
calcoffsets();
curr = prev;
calcoffsets();
while(next && (curr = curr->right))
calcoffsets();
}
sel = matchend;
break;
case CONTROL('B'):
if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
cursor = nextrune(-1);
break;
}
/* fallthrough */
case CONTROL('P'):
if (sel && sel->left && (sel = sel->left)->right == curr) {
curr = prev;
calcoffsets();
}
break;
case CONTROL('F'):
if (text[cursor] != '\0') {
cursor = nextrune(+1);
break;
}
/* fallthrough */
case CONTROL('N'):
if (sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
break;
case CONTROL('D'):
if (text[cursor] == '\0')
break;
cursor = nextrune(+1);
/* fallthrough */
case CONTROL('H'):
case CONTROL('?'): /* Backspace */
if (cursor == 0)
break;
insert(NULL, nextrune(-1) - cursor);
break;
case CONTROL('I'): /* TAB */
if (!sel)
break;
strncpy(text, sel->text, sizeof text);
cursor = strlen(text);
match();
break;
case CONTROL('K'):
text[cursor] = '\0';
match();
break;
case CONTROL('U'):
insert(NULL, 0 - cursor);
break;
case CONTROL('W'):
while (cursor > 0 && text[nextrune(-1)] == ' ')
insert(NULL, nextrune(-1) - cursor);
while (cursor > 0 && text[nextrune(-1)] != ' ')
insert(NULL, nextrune(-1) - cursor);
break;
case CONTROL('V'):
if (!prev)
break;
sel = curr = prev;
calcoffsets();
break;
default:
if (!iscntrl(*buf))
insert(buf, strlen(buf));
break;
}
drawmenu();
}
}
void
keypress(XKeyEvent *ev) {
char buf[32];
size_t len;
KeySym ksym;
len = strlen(text);
XLookupString(ev, buf, sizeof buf, &ksym, NULL);
if(ev->state & ControlMask) {
switch(tolower(ksym)) {
default:
return;
case XK_a:
ksym = XK_Home;
break;
case XK_b:
ksym = XK_Left;
break;
case XK_c:
ksym = XK_Escape;
break;
case XK_d:
ksym = XK_Delete;
break;
case XK_e:
ksym = XK_End;
break;
case XK_f:
ksym = XK_Right;
break;
case XK_h:
ksym = XK_BackSpace;
break;
case XK_i:
ksym = XK_Tab;
break;
case XK_j:
ksym = XK_Return;
break;
case XK_k: /* delete right */
text[cursor] = '\0';
match();
break;
case XK_n:
ksym = XK_Down;
break;
case XK_p:
ksym = XK_Up;
break;
case XK_u: /* delete left */
insert(NULL, 0 - cursor);
break;
case XK_w: /* delete word */
while(cursor > 0 && text[nextrune(-1)] == ' ')
insert(NULL, nextrune(-1) - cursor);
while(cursor > 0 && text[nextrune(-1)] != ' ')
insert(NULL, nextrune(-1) - cursor);
break;
case XK_y: /* paste selection */
XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
return;
}
}
switch(ksym) {
default:
if(!iscntrl(*buf))
insert(buf, strlen(buf));
break;
case XK_Delete:
if(cursor == len)
return;
cursor = nextrune(+1);
case XK_BackSpace:
if(cursor > 0)
insert(NULL, nextrune(-1) - cursor);
break;
case XK_End:
if(cursor < len) {
cursor = len;
break;
}
while(next) {
sel = curr = next;
calcoffsets();
}
while(sel && sel->right)
sel = sel->right;
break;
case XK_Escape:
exit(EXIT_FAILURE);
case XK_Home:
if(sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case XK_Left:
if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
cursor = nextrune(-1);
break;
}
else if(lines > 0)
return;
case XK_Up:
if(sel && sel->left && (sel = sel->left)->right == curr) {
curr = prev;
calcoffsets();
}
break;
case XK_Next:
if(!next)
return;
sel = curr = next;
calcoffsets();
break;
case XK_Prior:
if(!prev)
return;
sel = curr = prev;
calcoffsets();
break;
case XK_Return:
case XK_KP_Enter:
handle_return((sel && !(ev->state & ShiftMask)) ? sel->text : text);
case XK_Right:
if(cursor < len) {
cursor = nextrune(+1);
break;
}
else if(lines > 0)
return;
case XK_Down:
if(sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof text);
cursor = strlen(text);
match();
break;
}
drawmenu();
}