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Code Issues 1 Releases Wiki Activity

Make Ctrl-G in repl show docstring for symbol.

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Can be used to browse docs without poluting your repl session.
This commit is contained in:
Calvin Rose 2020-04-10 11:36:23 -05:00
parent 02f17bd4e4
commit 3b0e6357ad
2 changed files with 150 additions and 15 deletions
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6
src/boot/boot.janet
View File

@ -467,7 +467,7 @@
(for-template i start stop 1 < + body))
(defmacro eachk
"loop over each key in ds. returns nil."
"Loop over each key in ds. Returns nil."
[x ds & body]
(keys-template x ds false body))
@ -1495,9 +1495,9 @@
(defn doc-format
"Reformat text to wrap at a given line."
[text]
[text &opt width]
(def maxcol (- (dyn :doc-width 80) 8))
(def maxcol (- (or width (dyn :doc-width 80)) 8))
(var buf @" ")
(var word @"")
(var current 0)

157
src/mainclient/shell.c
View File

@ -515,6 +515,147 @@ static void check_specials(JanetByteView src) {
check_cmatch(src, "while");
}
static void resolve_format(JanetTable *entry) {
int is_macro = janet_truthy(janet_table_get(entry, janet_ckeywordv("macro")));
Janet refv = janet_table_get(entry, janet_ckeywordv("ref"));
int is_ref = janet_checktype(refv, JANET_ARRAY);
Janet value = janet_wrap_nil();
if (is_ref) {
JanetArray *a = janet_unwrap_array(refv);
if (a->count) value = a->data[0];
} else {
value = janet_table_get(entry, janet_ckeywordv("value"));
}
if (is_macro) {
fprintf(stderr, " macro\n");
gbl_lines_below++;
} else if (is_ref) {
janet_eprintf(" var (%t)\n", value);
gbl_lines_below++;
} else {
janet_eprintf(" %t\n", value);
gbl_lines_below++;
}
Janet sm = janet_table_get(entry, janet_ckeywordv("source-map"));
Janet path = janet_get(sm, janet_wrap_integer(0));
Janet line = janet_get(sm, janet_wrap_integer(1));
Janet col = janet_get(sm, janet_wrap_integer(2));
if (janet_checktype(path, JANET_STRING) && janet_truthy(line) && janet_truthy(col)) {
janet_eprintf(" %S on line %v, column %v\n", janet_unwrap_string(path), line, col);
gbl_lines_below++;
}
}
static void doc_format(JanetString doc, int32_t width) {
int32_t maxcol = width - 8;
uint8_t wordbuf[256] = {0};
int32_t wordp = 0;
int32_t current = 0;
if (maxcol > 200) maxcol = 200;
fprintf(stderr, " ");
for (int32_t i = 0; i < janet_string_length(doc); i++) {
uint8_t b = doc[i];
switch (b) {
default: {
if (maxcol <= current + wordp + 1) {
if (!current) {
fwrite(wordbuf, wordp, 1, stderr);
wordp = 0;
}
fprintf(stderr, "\n ");
gbl_lines_below++;
current = 0;
}
wordbuf[wordp++] = b;
break;
}
case '\t': {
if (maxcol <= current + wordp + 2) {
if (!current) {
fwrite(wordbuf, wordp, 1, stderr);
wordp = 0;
}
fprintf(stderr, "\n ");
gbl_lines_below++;
current = 0;
}
wordbuf[wordp++] = ' ';
wordbuf[wordp++] = ' ';
break;
}
case '\n':
case ' ': {
if (wordp) {
int32_t oldcur = current;
int spacer = maxcol > current + wordp + 1;
if (spacer) current++;
else current = 0;
current += wordp;
if (oldcur) fprintf(stderr, spacer ? " " : "\n ");
if (oldcur && !spacer) gbl_lines_below++;
fwrite(wordbuf, wordp, 1, stderr);
wordp = 0;
}
if (b == '\n') {
fprintf(stderr, "\n ");
gbl_lines_below++;
current = 0;
}
}
}
}
if (wordp) {
int32_t oldcur = current;
int spacer = maxcol > current + wordp + 1;
if (spacer) current++;
else current = 0;
current += wordp + 1;
if (oldcur) fprintf(stderr, spacer ? " " : "\n ");
if (oldcur && !spacer) gbl_lines_below++;
fwrite(wordbuf, wordp, 1, stderr);
wordp = 0;
}
}
static void find_matches(JanetByteView prefix) {
JanetTable *env = gbl_complete_env;
gbl_match_count = 0;
while (NULL != env) {
JanetKV *kvend = env->data + env->capacity;
for (JanetKV *kv = env->data; kv < kvend; kv++) {
if (!janet_checktype(kv->key, JANET_SYMBOL)) continue;
const uint8_t *sym = janet_unwrap_symbol(kv->key);
check_match(prefix, sym, janet_string_length(sym));
}
env = env->proto;
}
}
static void kshowdoc(void) {
if (!gbl_complete_env) return;
while (is_symbol_char_gen(gbl_buf[gbl_pos])) gbl_pos++;
JanetByteView prefix = get_symprefix();
Janet symbol = janet_symbolv(prefix.bytes, prefix.len);
Janet entry = janet_table_get(gbl_complete_env, symbol);
if (!janet_checktype(entry, JANET_TABLE)) return;
Janet doc = janet_table_get(janet_unwrap_table(entry), janet_ckeywordv("doc"));
if (!janet_checktype(doc, JANET_STRING)) return;
JanetString docs = janet_unwrap_string(doc);
int num_cols = getcols();
clearlines();
fprintf(stderr, "\n\n\n");
gbl_lines_below += 3;
resolve_format(janet_unwrap_table(entry));
fprintf(stderr, "\n");
gbl_lines_below += 1;
doc_format(docs, num_cols);
fprintf(stderr, "\n\n");
gbl_lines_below += 2;
/* Go up to original line (zsh-like autocompletion) */
fprintf(stderr, "\x1B[%dA", gbl_lines_below);
fflush(stderr);
}
static void kshowcomp(void) {
JanetTable *env = gbl_complete_env;
if (env == NULL) {
@ -530,17 +671,7 @@ static void kshowcomp(void) {
JanetByteView prefix = get_symprefix();
if (prefix.len == 0) return;
/* Find all matches */
gbl_match_count = 0;
while (NULL != env) {
JanetKV *kvend = env->data + env->capacity;
for (JanetKV *kv = env->data; kv < kvend; kv++) {
if (!janet_checktype(kv->key, JANET_SYMBOL)) continue;
const uint8_t *sym = janet_unwrap_symbol(kv->key);
check_match(prefix, sym, janet_string_length(sym));
}
env = env->proto;
}
find_matches(prefix);
check_specials(prefix);
@ -633,6 +764,10 @@ static int line() {
case 6: /* ctrl-f */
kright();
break;
case 7: /* ctrl-g */
kshowdoc();
refresh();
break;
case 127: /* backspace */
case 8: /* ctrl-h */
kbackspace(1);