Query the terminal size from the vte library when creating the console
and every time it might change. Vte doesn't send any signal specifically
for terminal size changes, so instead we register callbacks for
size-allocate and char-size-changed.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Filip Hejsek <filip.hejsek@gmail.com>
---
 ui/gtk.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/ui/gtk.c b/ui/gtk.c
index e83a366625..471528362f 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -2029,6 +2029,28 @@ static gboolean gd_vc_in(VteTerminal *terminal, gchar *text, guint size,
     return TRUE;
 }
 
+static void gd_vc_vte_update_size(VirtualConsole *vc)
+{
+    uint16_t cols, rows;
+    cols = vte_terminal_get_column_count(VTE_TERMINAL(vc->vte.terminal));
+    rows = vte_terminal_get_row_count(VTE_TERMINAL(vc->vte.terminal));
+    qemu_chr_resize(vc->vte.chr, cols, rows);
+}
+
+static void gd_vc_size_allocate(VteTerminal *terminal,
+                                GtkAllocation *allocation, gpointer user_data)
+{
+    VirtualConsole *vc = user_data;
+    gd_vc_vte_update_size(vc);
+}
+
+static void gd_vc_char_size_changed(VteTerminal *terminal, guint width,
+                                    guint height, gpointer user_data)
+{
+    VirtualConsole *vc = user_data;
+    gd_vc_vte_update_size(vc);
+}
+
 static GSList *gd_vc_vte_init(GtkDisplayState *s, VirtualConsole *vc,
                               Chardev *chr, int idx,
                               GSList *group, GtkWidget *view_menu)
@@ -2094,6 +2116,12 @@ static GSList *gd_vc_vte_init(GtkDisplayState *s, VirtualConsole *vc,
 
     qemu_chr_be_event(vc->vte.chr, CHR_EVENT_OPENED);
 
+    g_signal_connect(vc->vte.terminal, "size-allocate",
+                     G_CALLBACK(gd_vc_size_allocate), vc);
+    g_signal_connect(vc->vte.terminal, "char-size-changed",
+                     G_CALLBACK(gd_vc_char_size_changed), vc);
+    gd_vc_vte_update_size(vc);
+
     return group;
 }
 

-- 
2.52.0