eeshow/: retrieve title from *.sch; prefer over subsheet name when displaying

eeshow/gui.c

@@ -389,9 +389,13 @@ static void select_subsheet(void *user)
 
 	for (sheet = ctx->sheets; sheet; sheet = sheet->next)
 		if (sheet->sch == obj->u.sheet.sheet) {
+			const char *name;
+
 			sheet->prev = ctx->curr_sheet;
 			set_sheet(ctx, sheet);
-			overlay_add(&ctx->overlays, obj->u.sheet.name,
+			name = sheet->sch->title ? sheet->sch->title :
+			    obj->u.sheet.name;
+			overlay_add(&ctx->overlays, name,
 			    &ctx->aois, NULL, close_subsheet, ctx);
 			return;
 		}

eeshow/sch-parse.c

@@ -283,6 +283,7 @@ static struct sheet *new_sheet(struct sch_ctx *ctx)
 	struct sheet *sheet;
 
 	sheet = alloc_type(struct sheet);
+	sheet->title = NULL;
 	sheet->objs = NULL;
 	sheet->next_obj = &sheet->objs;
 	sheet->next = NULL;
@@ -441,6 +442,10 @@ static bool parse_line(const struct file *file, void *user, const char *line)
 			return 0;
 		break;
 	case sch_descr:
+		if (sscanf(line, "Title \"%m[^\"]\"", &s) == 1) {
+			ctx->curr_sheet->title = s;
+			return 1;
+		}
 		if (sscanf(line, "$EndDescr%n", &n) || !n)
 			return 1;
 		ctx->state = sch_basic;

eeshow/sch.h

@@ -91,6 +91,7 @@ struct sch_obj {
 };
 
 struct sheet {
+	const char *title;
 	struct sch_obj *objs;
 	struct sch_obj **next_obj;
 	struct sheet *parent;