From f9d71c637256b693444d21e0ee6760b183102abc Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Fri, 6 May 2016 02:33:10 -0400
Subject: track dirty display separate from dirty screen

---
 src/display.c     | 4 +++-
 src/display.h     | 1 +
 src/window-xlib.c | 8 ++++----
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/display.c b/src/display.c
index 8cff223..02a0689 100644
--- a/src/display.c
+++ b/src/display.c
@@ -87,9 +87,10 @@ void runes_display_set_window_size(RunesTerm *t)
 
 void runes_display_draw_screen(RunesTerm *t)
 {
+    RunesDisplay *display = &t->display;
     int r, rows;
 
-    if (!t->scr.dirty) {
+    if (!t->scr.dirty && !display->dirty) {
         return;
     }
 
@@ -104,6 +105,7 @@ void runes_display_draw_screen(RunesTerm *t)
     }
 
     t->scr.dirty = 0;
+    display->dirty = 0;
 }
 
 void runes_display_draw_cursor(RunesTerm *t, cairo_t *cr)
diff --git a/src/display.h b/src/display.h
index cbd65e5..c27cb0b 100644
--- a/src/display.h
+++ b/src/display.h
@@ -21,6 +21,7 @@ struct runes_display {
 
     char unfocused: 1;
     char has_selection: 1;
+    char dirty: 1;
 };
 
 void runes_display_init(RunesTerm *t);
diff --git a/src/window-xlib.c b/src/window-xlib.c
index 00f4545..2bdfa41 100644
--- a/src/window-xlib.c
+++ b/src/window-xlib.c
@@ -522,7 +522,7 @@ static void runes_window_backend_visible_scroll(RunesTerm *t, int count)
         return;
     }
 
-    t->scr.dirty = 1;
+    t->display.dirty = 1;
     runes_window_backend_flush(t);
 }
 
@@ -611,7 +611,7 @@ static void runes_window_backend_start_selection(
     XSetSelectionOwner(w->dpy, XA_PRIMARY, w->w, time);
     t->display.has_selection = (XGetSelectionOwner(w->dpy, XA_PRIMARY) == w->w);
 
-    t->scr.dirty = 1;
+    t->display.dirty = 1;
     runes_window_backend_request_flush(t);
 }
 
@@ -628,7 +628,7 @@ static void runes_window_backend_update_selection(
     *end = runes_window_backend_get_mouse_position(t, xpixel, ypixel);
 
     if (orig_end.row != end->row || orig_end.col != end->col) {
-        t->scr.dirty = 1;
+        t->display.dirty = 1;
         runes_window_backend_request_flush(t);
     }
 }
@@ -859,7 +859,7 @@ static void runes_window_backend_handle_selection_clear_event(
     UNUSED(e);
 
     t->display.has_selection = 0;
-    t->scr.dirty = 1;
+    t->display.dirty = 1;
     runes_window_backend_flush(t);
 }
 
-- 
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