commit e1bf3d6e8c8b52e910473d62f747176f22e206b1
from: Omar Polo <op@omarpolo.com>
date: Fri Jun 07 18:25:58 2024 UTC

add mini-edit-external

it's bound by default to C-x in the minibuffer keymap.  It'll open
an external editor to edit the content of the minibuffer.  When the
editor exits, we'll call the completion function with the content
of the file.

Stuff inputted with an external editor are not persisted to the
history thought.  That would require the UI to handle multiline
strings which is currently impossible.

commit - 3c7ed8d83ed06a3b7f30ceb6ba692e515f91e980
commit + e1bf3d6e8c8b52e910473d62f747176f22e206b1
blob - b2d69256bdb2e6b0a75dff773828e3988045022f
blob + f98e328499a42678d5e82a73dfc56a7126464d7c
--- cmd.c
+++ cmd.c
@@ -1176,4 +1176,12 @@ cmd_search(struct buffer *buffer)
 	enter_minibuffer(sensible_self_insert, search_select, exit_minibuffer, NULL,
 	    NULL, NULL, 0);
 	strlcpy(ministate.prompt, "Search: ", sizeof(ministate.prompt));
+}
+
+void
+cmd_mini_edit_external(struct buffer *buffer)
+{
+	GUARD_READ_ONLY();
+
+	ui_edit_externally();
 }
blob - bb81e7198c325db75faf09ebfbca2e3a5f86d316
blob + 6031a71966db32d3279e35426e334c79e5d776b1
--- cmd.h
+++ cmd.h
@@ -42,6 +42,7 @@ CMD(cmd_mini_abort,		"Abort the current minibuffer act
 CMD(cmd_mini_complete_and_exit,	"Complete the current minibuffer action.");
 CMD(cmd_mini_delete_backward_char, "Delete the character before the point.");
 CMD(cmd_mini_delete_char,	"Delete the character after the point.");
+CMD(cmd_mini_edit_external,	"Use an external editor to compose the text.");
 CMD(cmd_mini_goto_beginning,	"Select the first completion.");
 CMD(cmd_mini_goto_end,		"Select the last completion.");
 CMD(cmd_mini_kill_line,		"Delete from point until the end of the line.");
blob - ab7dfac0e780c559474ab835780372a9a766a5fe
blob + 13220c95e1ac0c13dc33f87674639ee5752ef16f
--- defaults.c
+++ defaults.c
@@ -502,6 +502,7 @@ load_default_keys(void)
 	minibuffer_set_key("del",	cmd_mini_delete_backward_char);
 	minibuffer_set_key("backspace",	cmd_mini_delete_backward_char);
 	minibuffer_set_key("C-h",	cmd_mini_delete_backward_char);
+	minibuffer_set_key("C-x",	cmd_mini_edit_external);
 
 	minibuffer_set_key("C-b",	cmd_backward_char);
 	minibuffer_set_key("C-f",	cmd_forward_char);
blob - 519753fc89a5c9e6738d0786725f9815c5668644
blob + 7ffc4801c3f0d75961f0597e18289164fe3aeb19
--- ui.c
+++ ui.c
@@ -1407,4 +1407,87 @@ again:
 	clear();
 	ui_schedule_redraw();
 }
+
+#define TMPFILE "/tmp/telescope.XXXXXXXXXX"
+
+void
+ui_edit_externally(void)
+{
+	FILE		*fp;
+	char		 buf[1024 + 1];
+	size_t		 r, len = 0;
+	const char	*editor;
+	char		 sfn[sizeof(TMPFILE)];
+	pid_t		 pid;
+	int		 fd, ret, s;
 
+	if (!in_minibuffer) {
+		message("Not in minibuffer!");
+		return;
+	}
+
+	if (ministate.compl.must_select || ministate.donefn == NULL) {
+		message("Can't use an external editor to complete");
+		return;
+	}
+
+	strlcpy(sfn, TMPFILE, sizeof(sfn));
+	if ((fd = mkstemp(sfn)) == -1) {
+		message("failed to create a temp file: %s", strerror(errno));
+		return;
+	}
+	(void) write(fd, ministate.buf, strlen(ministate.buf));
+	close(fd);
+
+	if ((editor = getenv("VISUAL")) == NULL ||
+	    (editor = getenv("EDITOR")) == NULL)
+		editor = "ed";
+
+	endwin();
+	fprintf(stderr, "%s: running %s %s\n", getprogname(), editor, sfn);
+
+	switch (pid = fork()) {
+	case -1:
+		message("failed to fork: %s", strerror(errno));
+		(void) unlink(sfn);
+		return;
+	case 0:
+		execlp(editor, editor, sfn, NULL);
+		warn("exec \"%s\" failed", editor);
+		_exit(1);
+	}
+
+	do {
+		ret = waitpid(pid, &s, 0);
+	} while (ret == -1 && errno == EINTR);
+
+	refresh();
+	clear();
+	ui_schedule_redraw();
+
+	if (WIFSIGNALED(s) || WEXITSTATUS(s) != 0) {
+		message("%s failed", editor);
+		(void) unlink(sfn);
+		return;
+	}
+
+	if ((fp = fopen(sfn, "r")) == NULL) {
+		message("can't open temp file!");
+		(void) unlink(sfn);
+		return;
+	}
+	(void) unlink(sfn);
+
+	while (len < sizeof(buf) - 1) {
+		r = fread(buf + len, 1, sizeof(buf) - 1 - len, fp);
+		len += r;
+		if (r == 0)
+			break;
+	}
+	buf[len] = '\0';
+	while (len > 0 && buf[len-1] == '\n')
+		buf[--len] = '\0';
+
+	ministate.donefn(buf);
+	exit_minibuffer();
+}
blob - faa3c3ec05175a95c64bbbe4cf3be10c56e78e86
blob + fbcce36ac69ef321f6dbbeed10e560f77d5cb8c4
--- ui.h
+++ ui.h
@@ -158,5 +158,6 @@ void		 ui_read(const char *, void (*)(const char *, st
 void		 ui_other_window(void);
 void		 ui_suspend(void);
 void		 ui_end(void);
+void		 ui_edit_externally(void);
 
 #endif