Add ncurses UI menu

Add support for an ncurses UI menu object.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/ui/ncurses/nc-scr.c b/ui/ncurses/nc-scr.c
new file mode 100644
index 0000000..3966e95
--- /dev/null
+++ b/ui/ncurses/nc-scr.c
@@ -0,0 +1,129 @@
+/*
+ *  Copyright (C) 2009 Sony Computer Entertainment Inc.
+ *  Copyright 2009 Sony Corp.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <assert.h>
+#include <stdarg.h>
+
+#include "log/log.h"
+#include "talloc/talloc.h"
+
+#include "nc-scr.h"
+
+void nc_start(void)
+{
+	initscr();			/* Initialize ncurses. */
+	cbreak();			/* Disable line buffering. */
+	noecho();			/* Disable getch() echo. */
+	keypad(stdscr, TRUE);		/* Enable num keypad keys. */
+	nonl();				/* Disable new-line translation. */
+	intrflush(stdscr, FALSE);	/* Disable interrupt flush. */
+	curs_set(0);			/* Make cursor invisible */
+	nodelay(stdscr, TRUE);		/* Enable non-blocking getch() */
+	while (getch() != ERR)		/* flush stdin */
+		(void)0;
+}
+
+void nc_atexit(void)
+{
+	clear();
+	refresh();
+	endwin();
+}
+
+static void nc_scr_status_clear(struct nc_scr *scr)
+{
+	mvwhline(scr->main_ncw, LINES - nc_scr_pos_status, 0, ' ', COLS);
+}
+
+static void nc_scr_status_draw(struct nc_scr *scr)
+{
+	mvwaddstr(scr->main_ncw, LINES - nc_scr_pos_status, 1,
+		scr->frame.status);
+}
+
+void nc_scr_frame_draw(struct nc_scr *scr)
+{
+	DBGS("title '%s'\n", scr->frame.title);
+	DBGS("help '%s'\n", scr->frame.help);
+	DBGS("status '%s'\n", scr->frame.status);
+
+	mvwaddstr(scr->main_ncw, nc_scr_pos_title, 1, scr->frame.title);
+	mvwhline(scr->main_ncw, nc_scr_pos_title_sep, 1, ACS_HLINE, COLS - 2);
+
+	mvwhline(scr->main_ncw, LINES - nc_scr_pos_help_sep, 1, ACS_HLINE,
+		COLS - 2);
+	mvwaddstr(scr->main_ncw, LINES - nc_scr_pos_help, 1, scr->frame.help);
+	nc_scr_status_draw(scr);
+}
+
+void nc_scr_status_free(struct nc_scr *scr)
+{
+	talloc_free(scr->frame.status);
+	scr->frame.status = NULL;
+	nc_scr_status_clear(scr);
+}
+
+/**
+ * nc_scr_status_printf - Set the text of the scr status using sprintf.
+ * @scr: The scr to opperate on.
+ * @text: The status text.
+ *
+ * The caller is reponsible for calling scr_draw() to update the display.
+ */
+
+void nc_scr_status_printf(struct nc_scr *scr, const char *format, ...)
+{
+	va_list ap;
+
+	nc_scr_status_free(scr);
+
+	va_start(ap, format);
+	scr->frame.status = talloc_vasprintf(scr, format, ap);
+	va_end(ap);
+
+	nc_scr_status_draw(scr);
+	wrefresh(scr->main_ncw);
+}
+
+int nc_scr_init(struct nc_scr *scr, enum pb_nc_sig sig, int begin_x,
+	void *ui_ctx,
+	void (*process_key)(struct nc_scr *),
+	int (*post)(struct nc_scr *),
+	int (*unpost)(struct nc_scr *),
+	void (*resize)(struct nc_scr *))
+{
+	scr->sig = sig;
+	scr->ui_ctx = ui_ctx;
+	scr->process_key = process_key;
+	scr->post = post;
+	scr->unpost = unpost;
+	scr->resize = resize;
+
+	scr->main_ncw = newwin(LINES, COLS, 0, 0);
+
+	scr->sub_ncw = derwin(scr->main_ncw,
+		LINES - nc_scr_frame_lines,
+		COLS - 1 - begin_x,
+		nc_scr_pos_sub,
+		begin_x);
+
+	assert(scr->main_ncw);
+	assert(scr->sub_ncw);
+
+	return scr->main_ncw && scr->sub_ncw;
+}