From b925268c90086e2f2c248ba02b095a63f29c8725 Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Mon, 22 Aug 2016 05:37:23 -0300
Subject: [PATCH] eeshow/gui/common.h (struct gui_sheet): add back link to
 history

---
 eeshow/gui/common.h | 2 ++
 eeshow/gui/gui.c    | 5 +++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/eeshow/gui/common.h b/eeshow/gui/common.h
index 9882121..cf82f47 100644
--- a/eeshow/gui/common.h
+++ b/eeshow/gui/common.h
@@ -26,10 +26,12 @@
 
 
 struct gui_ctx;
+struct gui_hist;
 
 struct gui_sheet {
 	const struct sheet *sch;
 	struct gui_ctx *ctx;	/* back link */
+	struct gui_hist *hist;	/* back link */
 	struct cro_ctx *gfx_ctx;
 
 	int w, h;		/* in eeschema coordinates */
diff --git a/eeshow/gui/gui.c b/eeshow/gui/gui.c
index f7f2038..d880be6 100644
--- a/eeshow/gui/gui.c
+++ b/eeshow/gui/gui.c
@@ -154,7 +154,7 @@ void mark_aois(struct gui_ctx *ctx, struct gui_sheet *sheet)
 }
 
 
-static struct gui_sheet *get_sheets(struct gui_ctx *ctx,
+static struct gui_sheet *get_sheets(struct gui_ctx *ctx, struct gui_hist *hist,
     const struct sheet *sheets)
 {
 	const struct sheet *sheet;
@@ -166,6 +166,7 @@ static struct gui_sheet *get_sheets(struct gui_ctx *ctx,
 		new = alloc_type(struct gui_sheet);
 		new->sch = sheet;
 		new->ctx = ctx;
+		new->hist = hist;
 		new->rendered = 0;
 
 		*next = new;
@@ -324,7 +325,7 @@ static void add_hist(void *user, struct hist *h)
 	hist->libs_open = 0;
 	hist->identical = 0;
 	sch = parse_files(hist, ahc->n_args, ahc->args, ahc->recurse, prev);
-	hist->sheets = sch ? get_sheets(ctx, sch) : NULL;
+	hist->sheets = sch ? get_sheets(ctx, hist, sch) : NULL;
 	hist->age = age;
 
 	hist->next = NULL;