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core-doc.c
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core-doc.c
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/*
* Copyright Neil Brown ©2015-2023 <[email protected]>
* May be distributed under terms of GPLv2 - see file:COPYING
*
* All content managed in edlib is stored in documents.
* There can be multiple document handlers which export the
* doc_operations interface to provide access to a particular
* style of document storage.
* A document has a list of marks and points (managed in core-mark.c)
* and some attributes (managed in attr.c).
* It has a list of 'views' which are notified when the document changes.
* Those are managed here.
*
* Finally all documents are kept in a single list which itself is
* used as the basis for a document: the document-list. The list is
* kept in most-recently-used order. Each document has a unique name
* in this list.
*/
#define _GNU_SOURCE for strchrnul
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include <stdio.h>
#include <fcntl.h>
#define PRIVATE_DOC_REF
struct doc_ref {
struct pane *p;
int ignore;
};
#define PANE_DATA_TYPE struct doc_data
#define DOC_DATA_TYPE struct doc
#include "core.h"
#include "misc.h"
#include "internal.h"
/* this is ->data for a document reference pane.
*/
struct doc_data {
struct pane *doc safe;
struct mark *point safe;
struct mark *old_point; /* location at last refresh */
struct mark *marks[4];
};
#include "core-pane.h"
static struct pane *doc_attach_assign(struct pane *parent safe, struct pane *doc safe);
static void doc_init(struct doc *d safe)
{
INIT_HLIST_HEAD(&d->marks);
INIT_TLIST_HEAD(&d->points, 0);
d->views = NULL;
d->nviews = 0;
d->name = NULL;
memset(d->recent_points, 0, sizeof(d->recent_points));
d->autoclose = 0;
d->readonly = 0;
d->refcnt = NULL;
}
struct pane *do_doc_register(struct pane *parent safe,
struct command *handle safe,
unsigned short data_size)
{
struct pane *p;
if (data_size < sizeof(struct doc))
/* Not enough room for the doc ! */
return NULL;
/* Documents are always registered against the root */
parent = pane_root(parent);
p = do_pane_register(parent, 0, handle, NULL, data_size);
if (!p)
return p;
doc_init(&p->doc);
return p;
}
/* For these 'default commands', home->data is struct doc */
DEF_CMD(doc_char)
{
struct pane *f = ci->focus;
struct doc_data *dd = ci->home->data;
struct mark *m = ci->mark;
int rpt = RPT_NUM(ci);
if (!m)
m = dd->point;
while (rpt > 0) {
if (doc_next(f,m) == WEOF)
break;
rpt -= 1;
}
while (rpt < 0) {
if (doc_prev(f,m) == WEOF)
break;
rpt += 1;
}
return 1;
}
DEF_CMD(doc_word)
{
/* Step to the Nth word boundary in appropriate
* direction. If N is 0, don't move.
* Return 1 if succeeded before EOF, else Efalse.
*/
struct pane *f = ci->focus;
struct mark *m = ci->mark;
int rpt = RPT_NUM(ci);
wint_t wi = 0;
if (!m)
return Enoarg;
/* doc:word should finish at a word boundary, which usually
* means an alphanum (possibly including '_' depending on doc
* attributes?). However it should never cross two different
* sets of spaces or punctuation. So if we cross space and
* punct and don't find alphanum, then we treat end of punct as
* a word boundary. We never stop immediately after a space.
* So skip spaces, then punct, then alphanum.
* Same in either direction.
*/
while (rpt > 0 && wi != WEOF) {
while ((wi = doc_following(f, m)) != WEOF &&
iswspace(wi))
doc_next(f, m);
while ((wi = doc_following(f, m)) != WEOF &&
!iswspace(wi) && !iswalnum(wi))
doc_next(f, m);
while ((wi = doc_following(f, m)) != WEOF &&
iswalnum(wi))
doc_next(f, m);
rpt -= 1;
}
while (rpt < 0 && wi != WEOF) {
while ((wi = doc_prior(f, m)) != WEOF &&
iswspace(wi))
doc_prev(f, m);
while ((wi = doc_prior(f, m)) != WEOF &&
!iswspace(wi) && !iswalnum(wi))
doc_prev(f, m);
while ((wi = doc_prior(f, m)) != WEOF &&
iswalnum(wi))
doc_prev(f, m);
rpt += 1;
}
return rpt == 0 ? 1 : Efalse;
}
static bool check_slosh(struct pane *p safe, struct mark *m safe)
{
wint_t ch;
/* Check is preceded by exactly 1 '\' */
if (doc_prior(p, m) != '\\')
return False;
doc_prev(p,m);
ch = doc_prior(p, m);
doc_next(p,m);
return ch != '\\';
}
DEF_CMD(doc_expr)
{
/* doc_expr skips an 'expression' which is the same as a word
* unless we see open '({[' or close ')}]' or quote (\'\").
* We ignore quotes when preceeded by a single '\'
* If we see close going forward, or open going backward, we stop.
* If we see open going forward or close going backward, or quote,
* we skip to matching close/open/quote, allowing for nested
* open/close etc. Inside quotes, we stop at EOL.
* If num2 is 1, then if we reach a true 'open' we continue
* one more character to enter (going forward) or leave (backward)
* the expression.
* 'str' can be set to extra chars that should be included in words.
*/
struct pane *f = ci->focus;
struct mark *m = ci->mark;
int rpt = RPT_NUM(ci);
int enter_leave = ci->num2;
int dir = rpt > 0 ? 1 : -1;
char *open;
char *close;
const char *wordchars = ci->str ?: "";
const char *special safe = "[](){}'\"";
if (!m)
return Enoarg;
if (dir > 0) {
open = "([{"; close = ")]}";
} else {
open = ")]}"; close = "([{";
}
while (rpt != 0) {
wint_t wi;
while ((wi = doc_pending(f, m, dir)) != WEOF
&& iswspace(wi))
doc_move(f, m, dir);
while ((wi = doc_pending(f, m, dir)) != WEOF &&
!iswspace(wi) && !iswalnum(wi) &&
(wi > 255 || (strchr(special, wi) == NULL &&
strchr(wordchars, wi) == NULL)))
doc_move(f, m, dir);
if (strchr(close, wi)) {
if (dir < 0 && enter_leave) {
doc_prev(f, m);
rpt += 1;
} else
/* hit a close */
break;
} else if (strchr(open, wi)) {
/* skip bracketed expression */
int depth = 1;
wint_t q = 0;
doc_move(f, m, dir);
if (enter_leave && dir > 0)
/* Just entered the expression */
rpt -= 1;
else while (depth > 0 &&
(wi = doc_move(f, m, dir)) != WEOF) {
if (q) {
if (dir > 0)
doc_prev(f,m);
if ((!check_slosh(f, m) && wi == q) ||
is_eol(wi))
q = 0;
if (dir > 0)
doc_next(f,m);
} else if (strchr(open, wi))
depth += 1;
else if (strchr(close, wi))
depth -= 1;
else if (wi == '"' || wi == '\'') {
if (dir > 0)
doc_prev(f,m);
if (!check_slosh(f, m))
q = wi;
if (dir > 0)
doc_next(f,m);
}
}
} else if (wi == '"' || wi == '\'') {
/* skip quoted or to EOL */
wint_t q = wi;
bool slosh = False;
if (dir > 0) {
slosh = check_slosh(f, m);
doc_move(f, m, dir);
} else {
doc_move(f, m, dir);
slosh = check_slosh(f, m);
}
if (!slosh) {
while (((wi = doc_pending(f, m, dir))
!= WEOF) &&
!is_eol(wi)) {
if (dir > 0) {
slosh = check_slosh(f, m);
doc_next(f, m);
} else {
doc_prev(f, m);
slosh = check_slosh(f, m);
}
if (wi == q && !slosh)
break;
}
}
} else while (((wi=doc_pending(f, m, dir)) != WEOF && iswalnum(wi)) ||
(wi > 0 && wi <= 255 &&
strchr(wordchars, wi) != NULL))
doc_move(f, m, dir);
if (!enter_leave)
rpt -= dir;
if (wi == WEOF)
break;
}
return rpt ? 2 : 1;
}
DEF_CMD(doc_WORD)
{
/* Step to the Nth word boundary in appropriate
* direction. For this function, puctuation is treated the
* same as alphanum. Only space separates words.
* If N is 0, don't move.
* Return 1 if succeeded before EOF, else Efalse.
*/
struct pane *f = ci->focus;
struct mark *m = ci->mark;
int rpt = RPT_NUM(ci);
if (!m)
return Enoarg;
/* We skip spaces, then non-spaces */
while (rpt > 0) {
wint_t wi;
while ((wi = doc_following(f, m)) != WEOF &&
iswspace(wi))
doc_next(f,m);
while ((wi = doc_following(f, m)) != WEOF &&
!iswspace(wi))
doc_next(f,m);
rpt -= 1;
}
while (rpt < 0) {
wint_t wi;
while ((wi = doc_prior(f, m)) != WEOF &&
iswspace(wi))
doc_prev(f,m);
while ((wi = doc_prior(f, m)) != WEOF &&
!iswspace(wi))
doc_prev(f,m);
rpt += 1;
}
return rpt == 0 ? 1 : Efalse;
}
DEF_CMD(doc_eol)
{
struct pane *f = ci->focus;
struct mark *m = ci->mark;
wint_t ch = 1;
int rpt = RPT_NUM(ci);
bool one_more = ci->num2 > 0;
if (!m)
return Enoarg;
while (rpt > 0 && ch != WEOF) {
while ((ch = doc_next(f, m)) != WEOF &&
!is_eol(ch))
;
if (ch != WEOF)
rpt -= 1;
}
while (rpt < 0 && ch != WEOF) {
while ((ch = doc_prev(f, m)) != WEOF &&
!is_eol(ch))
;
if (ch != WEOF)
rpt += 1;
}
if (!one_more) {
if (is_eol(ch)) {
if (RPT_NUM(ci) > 0)
doc_prev(f, m);
else if (RPT_NUM(ci) < 0)
doc_next(f, m);
}
if (ch == WEOF) {
if (RPT_NUM(ci) > 0)
rpt -= 1;
else if (RPT_NUM(ci) < 0)
rpt += 1;
}
}
return rpt == 0 ? 1 : Efalse;
}
DEF_CMD(doc_file)
{
int rpt = RPT_NUM(ci);
struct mark *m = ci->mark;
if (!m)
return Enoarg;
call("doc:set-ref", ci->focus, (rpt < 0), m);
return 1;
}
DEF_CMD(doc_line)
{
struct pane *p = ci->focus;
struct doc_data *dd = ci->home->data;
struct mark *m = ci->mark;
wint_t ch = 1;
int rpt = RPT_NUM(ci);
if (!m)
m = dd->point;
while (rpt > 0 && ch != WEOF) {
while ((ch = doc_next(p, m)) != WEOF &&
!is_eol(ch))
;
rpt -= 1;
}
while (rpt < 0 && ch != WEOF) {
while ((ch = doc_prev(p, m)) != WEOF &&
!is_eol(ch))
;
rpt += 1;
}
return 1;
}
DEF_CMD(doc_para)
{
/* Default paragraph move - find blank line - two or more
* is_eol() chars.
* If moving forward, skip over all those chars.
* If moving backward, stop before the first one.
*/
struct pane *p = ci->focus;
struct mark *m = ci->mark;
int rpt = RPT_NUM(ci);
wint_t ch = 0;
int nlcnt = 0;
int dir = rpt > 0 ? 1 : -1;
if (!m)
return Enoarg;
while (dir < 0 && is_eol(doc_prior(p, m)))
doc_prev(p, m);
while (rpt && ch != WEOF) {
nlcnt = 0;
while (ch != WEOF) {
ch = doc_move(p, m, dir);
if (is_eol(ch))
nlcnt += 1;
else if (nlcnt < 2)
nlcnt = 0;
else {
doc_move(p, m, -dir);
break;
}
}
rpt += dir;
}
while (dir < 0 && nlcnt-- > 0)
doc_next(p, m);
return 1;
}
DEF_CMD(doc_page)
{
struct pane *p = ci->focus;
struct doc_data *dd = ci->home->data;
struct mark *m = ci->mark, *old;
wint_t ch = 1;
int rpt = RPT_NUM(ci);
if (!m)
m = dd->point;
old = mark_dup(m);
rpt *= p->h-2;
/* repeat count is in 1000th of the pane */
rpt /= 1000;
while (rpt > 0 && ch != WEOF) {
while ((ch = doc_next(p, m)) != WEOF &&
!is_eol(ch))
;
rpt -= 1;
}
while (rpt < 0 && ch != WEOF) {
while ((ch = doc_prev(p, m)) != WEOF &&
!is_eol(ch))
;
rpt += 1;
}
if (mark_same(m, old)) {
mark_free(old);
return 2;
}
mark_free(old);
return 1;
}
DEF_CMD(doc_set)
{
struct doc *d = &ci->home->doc;
const char *val = ksuffix(ci, "doc:set:");
if (!*val)
val = ci->str2;
if (!val)
return Enoarg;
if (strcmp(val, "autoclose") == 0) {
d->autoclose = ci->num;
return 1;
}
if (strcmp(val, "readonly") == 0) {
d->readonly = ci->num;
call("doc:notify:doc:status-changed", ci->home);
return 1;
}
if (ci->str)
attr_set_str(&ci->home->attrs, val, ci->str);
return 1;
}
DEF_CMD(doc_append)
{
struct pane *p = ci->home;
const char *attr = ksuffix(ci, "doc:append:");
const char *val = ci->str;
const char *old;
if (!*attr)
attr = ci->str2;
if (!attr)
return Enoarg;
if (!val || !val[0])
return Enoarg;
/* Append the string to the attr. It attr doesn't
* exists, strip first char of val and use that.
*/
old = attr_find(p->attrs, attr);
if (!old) {
attr_set_str(&p->attrs, attr, val+1);
} else {
const char *pos = strstr(old, val+1);
int len = strlen(val+1);
if (pos &&
(pos == old || pos[-1] == val[0]) &&
(pos[len] == 0 || pos[len] == val[0]))
; /* val already present */
else
attr_set_str(&p->attrs, attr, strconcat(p, old, val));
}
return 1;
}
DEF_CMD(doc_get_attr)
{
struct doc *d = &ci->home->doc;
char pathbuf[PATH_MAX];
char *a;
if (!ci->str)
return Enoarg;
if ((a = attr_find(ci->home->attrs, ci->str)) != NULL)
;
else if (strcmp(ci->str, "doc-name") == 0)
a = d->name;
else if (strcmp(ci->str, "doc-modified") == 0)
a = "no";
else if (strcmp(ci->str, "doc-readonly") == 0) {
a = d->readonly ? "yes":"no";
} else if (strcmp(ci->str, "dirname") == 0) {
char *sl;
a = pane_attr_get(ci->home, "filename");
if (!a) {
a = realpath(".", pathbuf);
if (a != pathbuf && a)
strcpy(pathbuf, a);
if (pathbuf[1])
strcat(pathbuf, "/");
a = strsave(ci->focus, pathbuf);
} else {
sl = strrchr(a, '/');
if (!sl)
sl = a = "/";
a = strnsave(ci->focus, a, (sl-a)+1);
}
attr_set_str(&ci->home->attrs, "dirname", a);
} else if (strcmp(ci->str, "realdir") == 0) {
a = pane_attr_get(ci->home, "dirname");
if (a) {
strcpy(pathbuf,"/");
a = realpath(a, pathbuf);
if (a && a != pathbuf)
strcpy(pathbuf, a);
if (pathbuf[1])
strcat(pathbuf, "/");
a = pathbuf;
}
attr_set_str(&ci->home->attrs, "realdir", a);
}
if (a)
return comm_call(ci->comm2, "callback:get_attr", ci->focus, 0,
NULL, a) ?: 1;
return 1;
}
DEF_CMD(doc_doc_get_attr)
{
/* If the document doesn't provide the attribute for
* this location, see if there is a pane-attribute for
* the document.
*/
char *a;
if (!ci->str)
return Enoarg;
a = pane_attr_get(ci->home, ci->str);
if (a)
comm_call(ci->comm2, "cb", ci->focus, 0, NULL, a);
return 1;
}
DEF_CMD(doc_set_name)
{
struct doc *d = &ci->home->doc;
if (!ci->str)
return Enoarg;
free(d->name);
d->name = strdup(ci->str);
return call("doc:notify:doc:revisit", ci->home, ci->num) ?: 1;
}
DEF_CMD(doc_request_notify)
{
pane_add_notify(ci->focus, ci->home, ksuffix(ci, "doc:request:"));
return 1;
}
DEF_CMD_CLOSED(doc_notify)
{
/* Key is "doc:notify:..." */
int ret = pane_notify(ksuffix(ci, "doc:notify:"),
ci->home,
ci->num, ci->mark, ci->str,
ci->num2, ci->mark2, ci->str2, ci->comm2);
return ret;
}
static int do_del_view(struct doc *d safe, int v,
struct pane *owner)
{
bool warned = False;
/* This view should only have points on the list, not typed
* marks. Just delete everything and clear the 'notify' pointer
*/
if (v < 0 || v >= d->nviews || d->views == NULL ||
!owner || d->views[v].owner != owner)
return Einval;
d->views[v].owner = NULL;
while (!tlist_empty(&d->views[v].head)) {
struct mark *m;
struct tlist_head *tl = d->views[v].head.next;
switch (TLIST_TYPE(tl)) {
case GRP_LIST: /* A point */
tlist_del_init(tl);
break;
case GRP_MARK: /* a vmark */
m = container_of(tl, struct mark, view);
if (m->mdata)
pane_call(owner, "Close:mark", owner, 0, m);
if (tl == d->views[v].head.next) {
/* It hasn't been freed */
if (m->mdata && !warned) {
call("editor:notify:Message:broadcast",
owner, 0, NULL,
"WARNING mark not freed by Close:mark");
LOG("WARNING Mark on %s not freed by Close:mark",
owner->name);
warned = True;
}
m->mdata = NULL;
mark_free(m);
}
break;
default: /* impossible */
abort();
}
}
return 1;
}
DEF_CMD(doc_delview)
{
struct doc *d = &ci->home->doc;
return do_del_view(d, ci->num, ci->focus);
}
DEF_CMD(doc_addview)
{
struct doc *d = &ci->home->doc;
struct docview *g;
int ret;
int i;
for (ret = 0; d->views && ret < d->nviews; ret++)
if (d->views[ret].owner == NULL)
break;
if (!d->views || ret == d->nviews) {
/* Resize the view list */
d->nviews += 4;
g = alloc_buf(sizeof(*g) * d->nviews, pane);
for (i = 0; d->views && i < ret; i++) {
tlist_add(&g[i].head, GRP_HEAD, &d->views[i].head);
tlist_del(&d->views[i].head);
g[i].owner = d->views[i].owner;
}
for (; i < d->nviews; i++) {
INIT_TLIST_HEAD(&g[i].head, GRP_HEAD);
g[i].owner = NULL;
}
unalloc_buf(d->views, sizeof(*g)*(d->nviews - 4), pane);
d->views = g;
/* now resize all the points */
points_resize(d);
}
if (d->views /* FIXME always true */) {
points_attach(d, ret);
d->views[ret].owner = ci->focus;
pane_add_notify(ci->home, ci->focus, "Notify:Close");
}
return 1 + ret;
}
DEF_CMD_CLOSED(doc_close_doc)
{
struct doc *d = &ci->home->doc;
doc_free(d, ci->home);
return 1;
}
DEF_CMD_CLOSED(doc_view_close)
{
/* A pane which once held a view is closing. We must discard
* that view if it still exists.
*/
struct doc *d = &ci->home->doc;
int v;
for (v = 0 ; d->views && v < d->nviews; v++)
do_del_view(d, v, ci->focus);
return 1;
}
DEF_CMD(doc_vmarkget)
{
struct mark *m, *m2;
m = do_vmark_first(&ci->home->doc, ci->num, ci->focus);
m2 = do_vmark_last(&ci->home->doc, ci->num, ci->focus);
return comm_call(ci->comm2, "callback:vmark", ci->focus,
0, m, NULL, 0, m2) ?: 1;
}
DEF_CMD(doc_vmarkprev)
{
struct mark *m = NULL;
if (ci->mark)
m = do_vmark_at_or_before(&ci->home->doc, ci->mark,
ci->num, ci->focus);
comm_call(ci->comm2, "callback:vmark", ci->focus, 0, m);
return 1;
}
DEF_CMD(doc_vmarknew)
{
struct mark *m;
m = doc_new_mark(ci->home, ci->num, ci->focus);
comm_call(ci->comm2, "callback:vmark", ci->focus, 0, m);
return 1;
}
DEF_CMD(doc_drop_cache)
{
struct pane *p = ci->home;
struct doc *d = &p->doc;
if (d->autoclose)
pane_close(p);
return 1;
}
DEF_CMD(doc_delayed_close)
{
struct pane *p = ci->home;
int ret;
/* If there are any doc-displays open, then will return '1' and
* we will know not to destroy document yet.
*/
ret = pane_notify("doc:notify-viewers", p);
if (ret == 0)
call("doc:drop-cache", p);
return 1;
}
DEF_CMD(doc_do_closed)
{
struct pane *p = ci->home;
struct pane *child;
/* Close the path of filters from doc to focus */
child = pane_my_child(p, ci->focus);
if (child)
pane_close(child);
call_comm("event:on-idle", p, &doc_delayed_close, 1);
return 1;
}
DEF_CMD(doc_do_destroy)
{
pane_close(ci->home);
return 1;
}
DEF_CMD(doc_get_point)
{
struct doc_data *dd = ci->home->data;
int mnum = 0;
if (ci->num >= 1 && ci->num <= 4)
mnum = ci->num - 1;
comm_call(ci->comm2, "callback", ci->focus, 0, dd->point, NULL,
0, dd->marks[mnum]);
return 1;
}
DEF_CMD(doc_default_content)
{
/* doc:content delivers one char at a time to a callback.
* This is used for 'search' and 'copy'.
* This default version calls doc:char which is simple, but might
* be slow.
*
* If called as doc:content-bytes: return bytes, not chars
*
* .mark is 'location': to start. This is not moved.
* .mark2, if set, is location to stop.
* .comm2 is 'consume': pass char mark and report if finished.
*
* comm2 is passed:
* .mark - the mark that was passed in and gets moved
* .num - char character just before .mark
* .str - num utf8 text after mark. It may not be present
* and if it is, at most .num2 bytes can be used
* .num2 - usable length of .str
*
* comm2 it typically embedded in another struct that can
* be accessed in the callback (using container_of in C code).
* If the caller need to know where the callback aborted, the
* callback need to record that somehow.
*
* comm2 should return 1 if the main char was consumed,
* 1+n if n bytes (not chars) from str were consumed
* -ve to abort.
*
* If the callback processes some of 'str', the mark will no longer
* be accurate. If it needs an accurate mark, it can walk a copy
* forward, or return a suitable count and be called again with an
* accurate mark.
*/
struct mark *m = ci->mark;
int nxt;
char *cmd = "doc:char";
if (!m || !ci->comm2)
return Enoarg;
m = mark_dup(m);
if (strcmp(ci->key, "doc:content-bytes") == 0)
cmd = "doc:byte";
nxt = call(cmd, ci->home, 1, m);
while (nxt > 0 && nxt != CHAR_RET(WEOF) &&
(!ci->mark2 || mark_ordered_or_same(m, ci->mark2)) &&
comm_call(ci->comm2, "consume", ci->home, (nxt & 0x1FFFF), m) > 0)
nxt = call(cmd, ci->home, 1, m);
mark_free(m);
return nxt < 0 ? nxt : 1;
}
DEF_CMD(doc_insert_char)
{
const char *str = ksuffix(ci, "doc:char-");
return call("doc:replace", ci->focus, 1, NULL, str, ci->num2,
ci->mark);
}
struct getstr {
struct buf b;
struct mark *end;
struct command c;
int bytes;
};
DEF_CB(get_str_callback)
{
/* First char will be in ci->num and ->mark will be *after* that char.
* Some more chars might be in ->str (for ->num2 bytes).
* If ->x, then expect that many bytes (approximately).
* Return Efalse to stop, 1 if char was consumed,
* 1+N (N <= ->num2) if N bytes from ->str were consumed.
*/
wint_t wch = ci->num & 0x1FFFFF;
struct getstr *g = container_of(ci->comm, struct getstr, c);
if (!ci->mark)
return Enoarg;
if (ci->x)
buf_resize(&g->b, ci->x);
if (g->bytes)
buf_append_byte(&g->b, ci->num & 0xff);
else
buf_append(&g->b, wch);
if (g->end && (ci->mark->seq >= g->end->seq ||
mark_same(ci->mark, g->end)))
return Efalse;
if (!ci->str || ci->num2 <= 0)
return 1;
/* This could over-run ->end, but we assume it doesn't */
buf_concat_len(&g->b, ci->str, ci->num2);
return 1 + ci->num2;
}
DEF_CMD(doc_get_str)
{
/* doc:get-str
* uses doc:content to collect the content
* into a buf.
* If mark and mark2 are both set, they are end points.
* If only mark is set we ignore it. It is likely
* 'point' provided by default.
*/
int bytes = strcmp(ci->key, "doc:get-bytes") == 0;
struct getstr g;
struct mark *from = NULL, *to = NULL;
if (ci->mark && ci->mark2) {
if (ci->mark2->seq < ci->mark->seq) {
from = ci->mark2;
to = ci->mark;
} else {
from = ci->mark;
to = ci->mark2;
}
}
g.c = get_str_callback;
g.bytes = bytes;
buf_init(&g.b);
g.end = to;
if (!from) {
from = mark_new(ci->focus);
if (from)
call("doc:set-ref", ci->focus, 1, from);
}
if (!from)
return Efail;
if (!to) {
to = mark_new(ci->focus);
if (to)
call("doc:set-ref", ci->focus, 0, to);
}
call_comm(bytes ? "doc:content-bytes" : "doc:content",
ci->focus, &g.c, 0, from, NULL, 0, to);
if (from != ci->mark && from != ci->mark2)
mark_free(from);
if (to != ci->mark && to != ci->mark2)
mark_free(to);
comm_call(ci->comm2, "callback:get-str", ci->focus, g.b.len, NULL,
buf_final(&g.b));
free(g.b.b);
return 1;
}
DEF_CMD(doc_notify_viewers)
{
/* The autoclose document wants to know if it should close,
* or a new view wants to find an active point.
* If a mark was provided, move it to point, then
* report that there are active viewers by returning 1
*/
struct doc_data *dd = ci->home->data;