From c8a6a4c44d73cc7b1c857be578256f9a581d5b13 Mon Sep 17 00:00:00 2001
From: Pavol Babincak <scroolik@gmail.com>
Date: Sun, 9 Apr 2006 16:59:27 +0200
Subject: [PATCH] Fix broken double-width chars when displaying menu or dialog.

---
 src/bfu/dialog.c    |  8 +++++
 src/bfu/menu.c      |  8 +++++
 src/terminal/draw.c | 71 +++++++++++++++++++++++++++++++++++++++++++++
 src/terminal/draw.h |  5 ++++
 4 files changed, 92 insertions(+)

diff --git a/src/bfu/dialog.c b/src/bfu/dialog.c
index db63eeb87..67be711b3 100644
--- a/src/bfu/dialog.c
+++ b/src/bfu/dialog.c
@@ -639,7 +639,15 @@ draw_dialog(struct dialog_data *dlg_data, int width, int height)
 		/* Draw shadow */
 		draw_shadow(term, &dlg_data->box,
 			    get_bfu_color(term, "dialog.shadow"), 2, 1);
+#ifdef CONFIG_UTF_8
+		if (term->utf8)
+			fix_dwchar_around_box(term, &dlg_data->box, 0, 2, 1);
+#endif /* CONFIG_UTF_8 */
 	}
+#ifdef CONFIG_UTF_8
+	else if(term->utf8)
+		fix_dwchar_around_box(term, &dlg_data->box, 0, 0, 0);
+#endif /* CONFIG_UTF_8 */
 }
 
 static void
diff --git a/src/bfu/menu.c b/src/bfu/menu.c
index 2fefb7ff8..ad64712d3 100644
--- a/src/bfu/menu.c
+++ b/src/bfu/menu.c
@@ -518,7 +518,15 @@ display_menu(struct terminal *term, struct menu *menu)
 		/* Draw shadow */
 		draw_shadow(term, &menu->box,
 			    get_bfu_color(term, "dialog.shadow"), 2, 1);
+#ifdef CONFIG_UTF_8
+		if (term->utf8)
+			fix_dwchar_around_box(term, &box, 1, 2, 1);
+#endif /* CONFIG_UTF_8 */
 	}
+#ifdef CONFIG_UTF_8
+	else if(term->utf8)
+		fix_dwchar_around_box(term, &box, 1, 0, 0);
+#endif /* CONFIG_UTF_8 */
 
 	menu_height = box.height;
 	box.height = 1;
diff --git a/src/terminal/draw.c b/src/terminal/draw.c
index aa03e2375..f539f961b 100644
--- a/src/terminal/draw.c
+++ b/src/terminal/draw.c
@@ -246,6 +246,77 @@ draw_border(struct terminal *term, struct box *box,
 	set_screen_dirty(term->screen, borderbox.y, borderbox.y + borderbox.height);
 }
 
+#ifdef CONFIG_UTF_8
+/* Checks cells left and right to the box for broken double-width chars.
+ * Replace it with ' '.
+ * 1+---+3
+ * 1|box|##4
+ * 1|   |##4
+ * 1|   |##4
+ * 1+---+##4
+ *   2#####4
+ * 1,2,3,4 - needs to be checked, # - shadow , +,-,| - border
+ */
+void
+fix_dwchar_around_box(struct terminal *term, struct box *box, int border,
+		     int shadow_width, int shadow_height)
+{
+	struct screen_char *schar; 
+	int height, x, y;
+
+	if (!term->utf8)
+		return;
+
+	/* 1 */
+	x = box->x - border - 1;
+	if (x > 0) {
+		y = box->y - border;
+		height = box->height + 2 * border;
+
+		schar = get_char(term, x, y);
+		for (;height--; schar += term->width)
+			if (unicode_to_cell(schar->data) == 2)
+				schar->data = ' ';
+	}
+
+	/* 2 */
+	x = box->x - border + shadow_width - 1;
+	if (x > 0 && x < term->width) {
+		y = box->y + border + box->height;
+		height = shadow_height;
+
+		schar = get_char(term, x, y);
+		for (;height--; schar += term->width)
+			if (unicode_to_cell(schar->data) == 2)
+				schar->data = ' ';
+	}
+
+	/* 3 */
+	x = box->x + box->width + border;
+	if (x < term->width) {
+		y = box->y - border;
+		height = shadow_height;
+
+		schar = get_char(term, x, y);
+		for (;height--; schar += term->width)
+			if (schar->data == UCS_NO_CHAR)
+				schar->data = ' ';
+	}
+
+	/* 4 */
+	x = box->x + box->width + border + shadow_width;
+	if (x < term->width) {
+		y = box->y - border + shadow_height;
+		height = box->height + 2 * border;
+
+		schar = get_char(term, x, y);
+		for (;height--; schar += term->width)
+			if (schar->data == UCS_NO_CHAR)
+				schar->data = ' ';
+	}
+}
+#endif
+
 #ifdef CONFIG_UTF_8
 void
 draw_char(struct terminal *term, int x, int y,
diff --git a/src/terminal/draw.h b/src/terminal/draw.h
index 77e34679d..2598cd908 100644
--- a/src/terminal/draw.h
+++ b/src/terminal/draw.h
@@ -246,6 +246,11 @@ void draw_shadow(struct terminal *term, struct box *box,
 void draw_border(struct terminal *term, struct box *box,
 		 struct color_pair *color, int width);
 
+#ifdef CONFIG_UTF_8
+void fix_dwchar_around_box(struct terminal *term, struct box *box, int border,
+			   int shadow_width, int shadow_height);
+#endif /* CONFIG_UTF_8 */
+
 /* Draws @length chars from @text. */
 void draw_text(struct terminal *term, int x, int y,
 	       unsigned char *text, int length,