Add a function to draw a simple menu onto a screen.

2 files changed, 57 insertions, 3 deletions

diff --git a/usr.bin/tmux/screen-write.c b/usr.bin/tmux/screen-write.c
index 5b0baf05a23..c4daa153703 100644
--- a/usr.bin/tmux/screen-write.c
+++ b/usr.bin/tmux/screen-write.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: screen-write.c,v 1.151 2019/04/18 11:07:28 nicm Exp $ */
+/* $OpenBSD: screen-write.c,v 1.152 2019/05/10 14:12:47 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -403,6 +403,44 @@ screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
 	screen_write_set_cursor(ctx, cx, cy);
 }
 
+/* Draw a menu on screen. */
+void
+screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, int choice)
+{
+	struct screen		*s = ctx->s;
+	struct grid_cell	 gc;
+	u_int			 cx, cy, i, j;
+
+	cx = s->cx;
+	cy = s->cy;
+
+	memcpy(&gc, &grid_default_cell, sizeof gc);
+
+	screen_write_box(ctx, menu->width + 4, menu->count + 2);
+	screen_write_cursormove(ctx, cx + 2, cy, 0);
+	format_draw(ctx, &gc, menu->width, menu->title, NULL);
+
+	for (i = 0; i < menu->count; i++) {
+		if (menu->items[i].name == NULL) {
+			screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
+			screen_write_hline(ctx, menu->width + 4, 1, 1);
+		} else {
+			if (choice >= 0 && i == (u_int)choice)
+				gc.attr |= GRID_ATTR_REVERSE;
+			screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
+			for (j = 0; j < menu->width; j++)
+				screen_write_putc(ctx, &gc, ' ');
+			screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
+			format_draw(ctx, &gc, menu->width, menu->items[i].name,
+			    NULL);
+			if (choice >= 0 && i == (u_int)choice)
+				gc.attr &= ~GRID_ATTR_REVERSE;
+		}
+	}
+
+	screen_write_set_cursor(ctx, cx, cy);
+}
+
 /* Draw a box on screen. */
 void
 screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny)
diff --git a/usr.bin/tmux/tmux.h b/usr.bin/tmux/tmux.h
index 05b75f6ecff..74bf710149b 100644
--- a/usr.bin/tmux/tmux.h
+++ b/usr.bin/tmux/tmux.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.893 2019/05/09 14:09:32 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.894 2019/05/10 14:12:47 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -748,6 +748,21 @@ struct screen_redraw_ctx {
 #define screen_hsize(s) ((s)->grid->hsize)
 #define screen_hlimit(s) ((s)->grid->hlimit)
 
+/* Menu item. */
+struct menu_item {
+	char			*name;
+	char			*command;
+	key_code		 key;
+};
+
+/* Menu. */
+struct menu {
+	char			*title;
+	struct menu_item	*items;
+	u_int			 count;
+	u_int			 width;
+};
+
 /*
  * Window mode. Windows can be in several modes and this is used to call the
  * right function to handle input and output.
@@ -1687,7 +1702,7 @@ char		*paste_make_sample(struct paste_buffer *);
 #define FORMAT_PANE 0x80000000U
 #define FORMAT_WINDOW 0x40000000U
 struct format_tree;
-const char	*format_skip(const char *s, const char *end);
+const char	*format_skip(const char *, const char *);
 int		 format_true(const char *);
 struct format_tree *format_create(struct client *, struct cmdq_item *, int,
 		     int);
@@ -2200,6 +2215,7 @@ void	 screen_write_fast_copy(struct screen_write_ctx *, struct screen *,
 	     u_int, u_int, u_int, u_int);
 void	 screen_write_hline(struct screen_write_ctx *, u_int, int, int);
 void	 screen_write_vline(struct screen_write_ctx *, u_int, int, int);
+void	 screen_write_menu(struct screen_write_ctx *, struct menu *, int);
 void	 screen_write_box(struct screen_write_ctx *, u_int, u_int);
 void	 screen_write_preview(struct screen_write_ctx *, struct screen *, u_int,
 	     u_int);