# Description: Adds preview pipe to enable closing and re-opening
# the preview pane when running an undetached editor.
#
# Authors: Luuk van Baal
diff --git a/src/nnn.c b/src/nnn.c
index 897c32f1..cf589bc8 100644
--- a/src/nnn.c
+++ b/src/nnn.c
@@ -367,7 +367,8 @@ typedef struct {
uint_t stayonsel : 1; /* Disable auto-proceed on select */
uint_t trash : 2; /* Use trash to delete files 1: trash-cli, 2: gio trash */
uint_t uidgid : 1; /* Show owner and group info */
- uint_t reserved : 7; /* Adjust when adding/removing a field */
+ uint_t previewer : 1; /* Run state of previewer */
+ uint_t reserved : 6; /* Adjust when adding/removing a field */
} runstate;
/* Contexts or workspaces */
@@ -515,6 +516,9 @@ static char g_tmpfpath[TMP_LEN_MAX] __attribute__ ((aligned));
/* Buffer to store plugins control pipe location */
static char g_pipepath[TMP_LEN_MAX] __attribute__ ((aligned));
+/* Buffer to store preview plugins control pipe location */
+static char g_ppipepath[TMP_LEN_MAX] __attribute__ ((aligned));
+
/* Non-persistent runtime states */
static runstate g_state;
@@ -689,12 +693,13 @@ static const char * const messages[] = {
#define NNN_FCOLORS 5
#define NNNLVL 6
#define NNN_PIPE 7
-#define NNN_MCLICK 8
-#define NNN_SEL 9
-#define NNN_ARCHIVE 10
-#define NNN_ORDER 11
-#define NNN_HELP 12 /* strings end here */
-#define NNN_TRASH 13 /* flags begin here */
+#define NNN_PPIPE 8
+#define NNN_MCLICK 9
+#define NNN_SEL 10
+#define NNN_ARCHIVE 11
+#define NNN_ORDER 12
+#define NNN_HELP 13 /* strings end here */
+#define NNN_TRASH 14 /* flags begin here */
static const char * const env_cfg[] = {
"NNN_OPTS",
@@ -705,6 +710,7 @@ static const char * const env_cfg[] = {
"NNN_FCOLORS",
"NNNLVL",
"NNN_PIPE",
+ "NNN_PPIPE",
"NNN_MCLICK",
"NNN_SEL",
"NNN_ARCHIVE",
@@ -848,7 +854,7 @@ static char *load_input(int fd, const char *path);
static int set_sort_flags(int r);
static void statusbar(char *path);
#ifndef NOFIFO
-static void notify_fifo(bool force);
+static void notify_fifo(bool force, bool closepreview);
#endif
/* Functions */
@@ -3047,7 +3053,7 @@ try_quit:
} else {
#ifndef NOFIFO
if (!g_state.fifomode)
- notify_fifo(TRUE); /* Send hovered path to NNN_FIFO */
+ notify_fifo(TRUE, FALSE); /* Send hovered path to NNN_FIFO */
#endif
escaped = TRUE;
settimeout();
@@ -5139,15 +5145,20 @@ static bool run_cmd_as_plugin(const char *file, char *runfile, uchar_t flags)
static bool plctrl_init(void)
{
- size_t len;
+ size_t len, lenbuf;
+ pid_t pid = getpid();
/* g_tmpfpath is used to generate tmp file names */
g_tmpfpath[tmpfplen - 1] = '\0';
- len = xstrsncpy(g_pipepath, g_tmpfpath, TMP_LEN_MAX);
+ len = lenbuf = xstrsncpy(g_pipepath, g_tmpfpath, TMP_LEN_MAX);
g_pipepath[len - 1] = '/';
- len = xstrsncpy(g_pipepath + len, "nnn-pipe.", TMP_LEN_MAX - len) + len;
- xstrsncpy(g_pipepath + len - 1, xitoa(getpid()), TMP_LEN_MAX - len);
+ xstrsncpy(g_ppipepath, g_pipepath, TMP_LEN_MAX);
+ len += xstrsncpy(g_pipepath + len, "nnn-pipe.", TMP_LEN_MAX - len);
+ xstrsncpy(g_pipepath + len - 1, xitoa(pid), TMP_LEN_MAX - len);
+ len = xstrsncpy(g_ppipepath + lenbuf, "nnn-ppipe.", TMP_LEN_MAX - lenbuf) + lenbuf;
+ xstrsncpy(g_ppipepath + len - 1, xitoa(pid), TMP_LEN_MAX - len);
setenv(env_cfg[NNN_PIPE], g_pipepath, TRUE);
+ setenv(env_cfg[NNN_PPIPE], g_ppipepath, TRUE);
return EXIT_SUCCESS;
}
@@ -5176,6 +5187,21 @@ static ssize_t read_nointr(int fd, void *buf, size_t count)
return len;
}
+void *previewpipe(void *arg __attribute__ ((unused)))
+{
+ int fd, buf;
+
+ mkfifo(g_ppipepath, 0600);
+ fd = open(g_ppipepath, O_RDONLY);
+
+ if (read(fd, &buf, 1) == 1)
+ g_state.previewer = buf;
+
+ close(fd);
+ unlink(g_ppipepath);
+ return NULL;
+}
+
static char *readpipe(int fd, char *ctxnum, char **path)
{
char ctx, *nextpath = NULL;
@@ -5795,7 +5821,7 @@ static void populate(char *path, char *lastname)
}
#ifndef NOFIFO
-static void notify_fifo(bool force)
+static void notify_fifo(bool force, bool closepreview)
{
if (!fifopath)
return;
@@ -5811,6 +5837,12 @@ static void notify_fifo(bool force)
}
}
+ if (closepreview) {
+ if (write(fifofd, "close\n", 6) != 6)
+ xerror();
+ return;
+ }
+
static struct entry lastentry;
if (!force && !memcmp(&lastentry, &pdents[cur], sizeof(struct entry)))
@@ -5860,7 +5892,7 @@ static void move_cursor(int target, int ignore_scrolloff)
#ifndef NOFIFO
if (!g_state.fifomode)
- notify_fifo(FALSE); /* Send hovered path to NNN_FIFO */
+ notify_fifo(FALSE, FALSE); /* Send hovered path to NNN_FIFO */
#endif
}
@@ -6477,7 +6509,7 @@ static bool browse(char *ipath, const char *session, int pkey)
pEntry pent;
enum action sel;
struct stat sb;
- int r = -1, presel, selstartid = 0, selendid = 0;
+ int r = -1, presel, selstartid = 0, selendid = 0, previewkey = 0;
const uchar_t opener_flags = (cfg.cliopener ? F_CLI : (F_NOTRACE | F_NOSTDIN | F_NOWAIT));
bool watch = FALSE;
ino_t inode = 0;
@@ -6743,7 +6775,7 @@ nochange:
move_cursor(r, 1);
#ifndef NOFIFO
else if ((event.bstate == BUTTON1_PRESSED) && !g_state.fifomode)
- notify_fifo(TRUE); /* Send clicked path to NNN_FIFO */
+ notify_fifo(TRUE, FALSE); /* Send clicked path to NNN_FIFO */
#endif
/* Handle right click selection */
if (event.bstate == BUTTON3_PRESSED) {
@@ -6816,7 +6848,7 @@ nochange:
}
#ifndef NOFIFO
if (g_state.fifomode && (sel == SEL_OPEN)) {
- notify_fifo(TRUE); /* Send opened path to NNN_FIFO */
+ notify_fifo(TRUE, FALSE); /* Send opened path to NNN_FIFO */
goto nochange;
}
#endif
@@ -6898,7 +6930,14 @@ nochange:
&& strstr(g_buf, "text")
#endif
) {
+ if (g_state.previewer)
+ notify_fifo(FALSE, TRUE);
spawn(editor, newpath, NULL, NULL, F_CLI);
+ if (g_state.previewer) {
+ pkey = previewkey;
+ goto run_plugin;
+ }
+
if (cfg.filtermode) {
presel = FILTER;
clearfilter();
@@ -7206,8 +7245,14 @@ nochange:
copycurname();
goto nochange;
case SEL_EDIT:
+ if (g_state.previewer)
+ notify_fifo(FALSE, TRUE);
if (!g_state.picker)
spawn(editor, newpath, NULL, NULL, F_CLI);
+ if (g_state.previewer) {
+ pkey = previewkey;
+ goto run_plugin;
+ }
continue;
default: /* SEL_LOCK */
lock_terminal();
@@ -7567,6 +7612,7 @@ nochange:
goto begin;
}
+run_plugin:
case SEL_PLUGIN:
/* Check if directory is accessible */
if (!xdiraccess(plgpath)) {
@@ -7592,6 +7638,12 @@ nochange:
goto nochange;
}
+ if (xstrcmp(tmp, "preview-tui") == 0) {
+ previewkey = r;
+ pthread_t tid;
+ pthread_create(&tid, NULL, previewpipe, NULL);
+ }
+
if (tmp[0] == '-' && tmp[1]) {
++tmp;
r = FALSE; /* Do not refresh dir after completion */
@@ -8185,8 +8237,10 @@ static void cleanup(void)
if (g_state.autofifo)
unlink(fifopath);
#endif
- if (g_state.pluginit)
+ if (g_state.pluginit){
unlink(g_pipepath);
+ unlink(g_ppipepath);
+ }
#ifdef DEBUG
disabledbg();
#endif
@@ -8690,7 +8744,7 @@ int main(int argc, char *argv[])
#ifndef NOFIFO
if (!g_state.fifomode)
- notify_fifo(FALSE);
+ notify_fifo(FALSE, FALSE);
if (fifofd != -1)
close(fifofd);
#endif