From 2488c3935bbd0cb8e920f294b31deec13cfb89bd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Tue, 1 Sep 2020 07:33:44 +0200
Subject: [PATCH] render: implement render_refresh_margins()

For now, it will reset term->render.last_buf to NULL, and then calls
grid_render() to do a full screen refresh.
---
 render.c   | 24 ++++++++++++++++++++++--
 render.h   |  1 +
 terminal.h |  2 ++
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/render.c b/render.c
index db60e7ca..7910b0c5 100644
--- a/render.c
+++ b/render.c
@@ -1932,11 +1932,13 @@ frame_callback(void *data, struct wl_callback *wl_callback, uint32_t callback_da
     term->window->frame_callback = NULL;
 
     bool grid = term->render.pending.grid;
+    bool margins = term->render.pending.margins;
     bool csd = term->render.pending.csd;
     bool search = term->render.pending.search;
     bool title = term->render.pending.title;
 
     term->render.pending.grid = false;
+    term->render.pending.margins = false;
     term->render.pending.csd = false;
     term->render.pending.search = false;
     term->render.pending.title = false;
@@ -1953,8 +1955,14 @@ frame_callback(void *data, struct wl_callback *wl_callback, uint32_t callback_da
     if (search && term->is_searching)
         render_search_box(term);
 
-    if (grid && (!term->delayed_render_timer.is_armed || csd || search))
+    if (margins)
+        term->render.last_buf = NULL;
+
+    if ((grid || margins) &&
+        (!term->delayed_render_timer.is_armed || csd || search))
+    {
         grid_render(term);
+    }
 }
 
 /* Move to terminal.c? */
@@ -2265,16 +2273,21 @@ fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data)
         assert(term->window->is_configured);
 
         bool grid = term->render.refresh.grid;
+        bool margins = term->render.refresh.margins;
         bool csd = term->render.refresh.csd;
         bool search = term->render.refresh.search;
         bool title = term->render.refresh.title;
 
         term->render.refresh.grid = false;
+        term->render.refresh.margins = false;
         term->render.refresh.csd = false;
         term->render.refresh.search = false;
         term->render.refresh.title = false;
 
         if (term->window->frame_callback == NULL) {
+            if (margins)
+                term->render.last_buf = NULL;
+
             if (csd && term->window->use_csd == CSD_YES) {
                 quirk_weston_csd_on(term);
                 render_csd(term);
@@ -2284,11 +2297,12 @@ fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data)
                 render_update_title(term);
             if (search)
                 render_search_box(term);
-            if (grid)
+            if (grid || margins)
                 grid_render(term);
         } else {
             /* Tells the frame callback to render again */
             term->render.pending.grid |= grid;
+            term->render.pending.margins |= margins;
             term->render.pending.csd |= csd;
             term->render.pending.search |= search;
             term->render.pending.title |= title;
@@ -2319,6 +2333,12 @@ render_refresh(struct terminal *term)
     term->render.refresh.grid = true;
 }
 
+void
+render_refresh_margins(struct terminal *term)
+{
+    term->render.refresh.margins = true;
+}
+
 void
 render_refresh_csd(struct terminal *term)
 {
diff --git a/render.h b/render.h
index 05c79322..3f8cf540 100644
--- a/render.h
+++ b/render.h
@@ -13,6 +13,7 @@ bool render_resize(struct terminal *term, int width, int height);
 bool render_resize_force(struct terminal *term, int width, int height);
 
 void render_refresh(struct terminal *term);
+void render_refresh_margins(struct terminal *term);
 void render_refresh_csd(struct terminal *term);
 void render_refresh_search(struct terminal *term);
 void render_refresh_title(struct terminal *term);
diff --git a/terminal.h b/terminal.h
index 4318f889..12e93ce2 100644
--- a/terminal.h
+++ b/terminal.h
@@ -373,6 +373,7 @@ struct terminal {
         /* Scheduled for rendering, as soon-as-possible */
         struct {
             bool grid;
+            bool margins;
             bool csd;
             bool search;
             bool title;
@@ -381,6 +382,7 @@ struct terminal {
         /* Scheduled for rendering, in the next frame callback */
         struct {
             bool grid;
+            bool margins;
             bool csd;
             bool search;
             bool title;