layer23/mobile: Added generic user interface

The user interface instance is currently accessed via telnet. It supports
different views to display or enter something.

It is still not complete.

4 files changed, 116 insertions, 1 deletions

diff --git a/src/host/layer23/include/osmocom/bb/Makefile.am b/src/host/layer23/include/osmocom/bb/Makefile.am
index 58a5f7fb..a8791fe4 100644
--- a/src/host/layer23/include/osmocom/bb/Makefile.am
+++ b/src/host/layer23/include/osmocom/bb/Makefile.am
@@ -1 +1 @@
-SUBDIRS = common misc mobile
+SUBDIRS = common misc ui mobile
diff --git a/src/host/layer23/include/osmocom/bb/ui/Makefile.am b/src/host/layer23/include/osmocom/bb/ui/Makefile.am
new file mode 100644
index 00000000..b010e53c
--- /dev/null
+++ b/src/host/layer23/include/osmocom/bb/ui/Makefile.am
@@ -0,0 +1,2 @@
+noinst_HEADERS = ui.h telnet_interface.h
+
diff --git a/src/host/layer23/include/osmocom/bb/ui/telnet_interface.h b/src/host/layer23/include/osmocom/bb/ui/telnet_interface.h
new file mode 100644
index 00000000..b35b47f9
--- /dev/null
+++ b/src/host/layer23/include/osmocom/bb/ui/telnet_interface.h
@@ -0,0 +1,17 @@
+#ifndef _LIBUI_TELNET_IF_H
+#define _LIBUI_TELNET_IF_H
+
+struct ui_telnet_connection {
+	struct llist_head entry;
+	void *priv;
+	struct osmo_fd fd;
+	struct ui_inst *ui;
+	struct buffer *obuf;
+	int iac, sb, esc;
+};
+
+int ui_telnet_init(struct ui_inst *ui, void *tall_ctx, int port);
+int ui_telnet_puts(struct ui_inst *ui, const char *text);
+void ui_telnet_exit(struct ui_inst *ui);
+
+#endif /* _LIBUI_TELNET_IF_H */
diff --git a/src/host/layer23/include/osmocom/bb/ui/ui.h b/src/host/layer23/include/osmocom/bb/ui/ui.h
new file mode 100644
index 00000000..75e2fad7
--- /dev/null
+++ b/src/host/layer23/include/osmocom/bb/ui/ui.h
@@ -0,0 +1,96 @@
+#ifndef _libui_h
+#define _libui_h
+
+#define UI_ROWS		8
+#define UI_COLS		12
+#define UI_TARGET	0
+
+enum ui_key {
+	UI_KEY_0 = '0',
+	UI_KEY_1 = '1',
+	UI_KEY_2 = '2',
+	UI_KEY_3 = '3',
+	UI_KEY_4 = '4',
+	UI_KEY_5 = '5',
+	UI_KEY_6 = '6',
+	UI_KEY_7 = '7',
+	UI_KEY_8 = '8',
+	UI_KEY_9 = '9',
+	UI_KEY_STAR = '*',
+	UI_KEY_HASH = '#',
+	UI_KEY_F1 = 1,
+	UI_KEY_F2 = 2,
+	UI_KEY_PICKUP = 26,
+	UI_KEY_HANGUP = 27,
+	UI_KEY_UP = 28,
+	UI_KEY_DOWN = 29,
+	UI_KEY_LEFT = 30,
+	UI_KEY_RIGHT = 31,
+};
+
+union ui_view_data {
+	struct {
+		int lines;
+		const char **text;
+		int vpos;
+	} listview;
+	struct {
+		int lines;
+		const char **text;
+		int vpos;
+		int cursor;
+	} selectview;
+	struct {
+		char *number;
+		int num_len;
+		int pos;
+		int options;
+		int options_pos;
+	} stringview;
+	struct {
+		unsigned int value;
+		int sign;
+		int min, max;
+	} intview;
+};
+
+struct ui_inst;
+
+struct ui_view {
+	const char *name;
+	int (*init)(struct ui_view *uv, union ui_view_data *ud);
+	int (*keypad)(struct ui_inst *ui, struct ui_view *uv,
+		union ui_view_data *ud, enum ui_key kp);
+	int (*display)(struct ui_inst *ui, union ui_view_data *ud);
+};
+
+struct ui_inst {
+	struct ui_view *uv;
+	const char *title;
+	const char *bottom_line;
+	union ui_view_data ud;
+	int (*key_cb)(struct ui_inst *ui, enum ui_key kp);
+	int (*beep_cb)(struct ui_inst *ui);
+	/* display */
+	char buffer[(UI_COLS + 1) * UI_ROWS];
+	int cursor_on, cursor_x, cursor_y;
+	/* telnet */
+	void *tall_telnet_ctx;
+	struct osmo_fd server_socket;
+	struct llist_head active_connections;
+	int (*telnet_cb)(struct ui_inst *ui);
+};
+
+extern struct ui_view ui_listview;
+extern struct ui_view ui_selectview;
+extern struct ui_view ui_stringview;
+extern struct ui_view ui_intview;
+
+int ui_inst_init(struct ui_inst *ui, struct ui_view *uv,
+	int (*key_cb)(struct ui_inst *ui, enum ui_key kp),
+	int (*beep_cb)(struct ui_inst *ui),
+	int (*telnet_cb)(struct ui_inst *ui));
+int ui_inst_keypad(struct ui_inst *ui, enum ui_key kp);
+int ui_inst_refresh(struct ui_inst *ui);
+
+#endif /* _libui_h */