From 9e2ca2b1a3603b58a138ad99d5606df264cc163f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sat, 8 Feb 2020 14:08:16 +0100
Subject: [PATCH] render: add render_resize_force()

This forces a full resize operation, even though actual window
size (or scale) hasn't changed.
---
 render.c | 23 ++++++++++++++++++-----
 render.h |  2 ++
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/render.c b/render.c
index f97a957f..980d5fe2 100644
--- a/render.c
+++ b/render.c
@@ -995,10 +995,10 @@ reflow(struct row **new_grid, int new_cols, int new_rows,
 }
 
 /* Move to terminal.c? */
-void
-render_resize(struct terminal *term, int width, int height)
+static void
+maybe_resize(struct terminal *term, int width, int height, bool force)
 {
-    if (width == 0 || height == 0)
+    if (!force && (width == 0 || height == 0))
         return;
 
     int scale = -1;
@@ -1015,12 +1015,12 @@ render_resize(struct terminal *term, int width, int height)
     width *= scale;
     height *= scale;
 
-    if (width == 0 && height == 0) {
+    if (!force && width == 0 && height == 0) {
         /* Assume we're not fully up and running yet */
         return;
     }
 
-    if (width == term->width && height == term->height && scale == term->scale)
+    if (!force && width == term->width && height == term->height && scale == term->scale)
         return;
 
     /* Cancel an application initiated "Synchronized Update" */
@@ -1124,10 +1124,23 @@ render_resize(struct terminal *term, int width, int height)
 
     term->render.last_cursor.cell = NULL;
 
+    term->render.last_buf = NULL;
     term_damage_view(term);
     render_refresh(term);
 }
 
+void
+render_resize(struct terminal *term, int width, int height)
+{
+    return maybe_resize(term, width, height, false);
+}
+
+void
+render_resize_force(struct terminal *term, int width, int height)
+{
+    return maybe_resize(term, width, height, true);
+}
+
 static void xcursor_callback(
     void *data, struct wl_callback *wl_callback, uint32_t callback_data);
 
diff --git a/render.h b/render.h
index 43f5314e..3bd52fa5 100644
--- a/render.h
+++ b/render.h
@@ -9,6 +9,8 @@ struct renderer *render_init(struct fdm *fdm, struct wayland *wayl);
 void render_destroy(struct renderer *renderer);
 
 void render_resize(struct terminal *term, int width, int height);
+void render_resize_force(struct terminal *term, int width, int height);
+
 void render_set_title(struct terminal *term, const char *title);
 void render_refresh(struct terminal *term);
 bool render_xcursor_set(struct terminal *term);