1 files changed, 151 insertions, 0 deletions
diff --git a/src/include/ipxe/widget.h b/src/include/ipxe/widget.h
new file mode 100644
index 0000000..fe93b9f
--- /dev/null
+++ b/src/include/ipxe/widget.h
@@ -0,0 +1,151 @@
+#ifndef _IPXE_WIDGET_H
+#define _IPXE_WIDGET_H
+
+/** @file
+ *
+ * Text widgets
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <curses.h>
+#include <ipxe/list.h>
+
+/** A text widget set */
+struct widgets {
+	/** List of widgets (in tab order) */
+	struct list_head list;
+	/** Containing window */
+	WINDOW *win;
+};
+
+/** A text widget */
+struct widget {
+	/** List of widgets (in tab order) */
+	struct list_head list;
+	/** Widget operations */
+	struct widget_operations *op;
+
+	/** Row */
+	unsigned int row;
+	/** Starting column */
+	unsigned int col;
+	/** Width */
+	unsigned int width;
+	/** Flags */
+	unsigned int flags;
+};
+
+/** Text widget flags */
+enum widget_flags {
+	/** Widget may have input focus */
+	WIDGET_EDITABLE = 0x0001,
+	/** Widget contains a secret */
+	WIDGET_SECRET = 0x0002,
+};
+
+/** Text widget operations */
+struct widget_operations {
+	/**
+	 * Draw widget
+	 *
+	 * @v widgets		Text widget set
+	 * @v widget		Text widget
+	 */
+	void ( * draw ) ( struct widgets *widgets, struct widget *widget );
+	/**
+	 * Edit widget
+	 *
+	 * @v widgets		Text widget set
+	 * @v widget		Text widget
+	 * @v key		Key pressed by user
+	 * @ret key		Key returned to application, or zero
+	 *
+	 * This will not update the display: you must call the draw()
+	 * method to ensure that any changes to an editable widget are
+	 * displayed to the user.
+	 */
+	int ( * edit ) ( struct widgets *widgets, struct widget *widget,
+			 int key );
+};
+
+/**
+ * Initialise text widget set
+ *
+ * @v widgets		Text widget set
+ * @v win		Containing window
+ */
+static inline __attribute__ (( always_inline )) void
+init_widgets ( struct widgets *widgets, WINDOW *win ) {
+
+	INIT_LIST_HEAD ( &widgets->list );
+	widgets->win = ( win ? win : stdscr );
+}
+
+/**
+ * Initialise text widget
+ *
+ * @v widget		Text widget
+ * @v op		Text widget operations
+ * @v row		Row
+ * @v col		Starting column
+ * @v width		Width
+ */
+static inline __attribute__ (( always_inline )) void
+init_widget ( struct widget *widget, struct widget_operations *op,
+	      unsigned int row, unsigned int col, unsigned int width,
+	      unsigned int flags ) {
+
+	widget->op = op;
+	widget->row = row;
+	widget->col = col;
+	widget->width = width;
+	widget->flags = flags;
+}
+
+/**
+ * Append text widget
+ *
+ * @v widgets		Text widget set
+ * @v widget		Text widget
+ */
+static inline __attribute__ (( always_inline )) void
+add_widget ( struct widgets *widgets, struct widget *widget ) {
+
+	list_add_tail ( &widget->list, &widgets->list );
+}
+
+/**
+ * Draw text widget
+ *
+ * @v widgets		Text widget set
+ * @v widget		Text widget
+ */
+static inline __attribute__ (( always_inline )) void
+draw_widget ( struct widgets *widgets, struct widget *widget ) {
+
+	widget->op->draw ( widgets, widget );
+}
+
+/**
+ * Edit text widget
+ *
+ * @v widgets		Text widget set
+ * @v widget		Text widget
+ * @v key		Key pressed by user
+ * @ret key		Key returned to application, or zero
+ *
+ * This will not update the display: you must call draw_widget() to
+ * ensure that any changes to an editable widget are displayed to the
+ * user.
+ */
+static inline __attribute__ (( always_inline )) int
+edit_widget ( struct widgets *widgets, struct widget *widget, int key ) {
+
+	return widget->op->edit ( widgets, widget, key );
+}
+
+extern int widget_ui ( struct widgets *widgets );
+
+#endif /* _IPXE_WIDGET_H */