[PATCH v8 09/12] ui/gtk: forward gtk console size to vc chardev

[Filip Hejsek <filip.hejsek@gmail.com>]

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 ed7ffc06b1..8d312d6a4b 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -2196,6 +2196,28 @@ 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 void gd_vc_vte_init(GtkDisplayState *s, VirtualConsole *vc,
                            Chardev *chr, int idx)
 {
@@ -2258,6 +2280,12 @@ static void gd_vc_vte_init(GtkDisplayState *s, VirtualConsole *vc,
                              gtk_label_new(vc->label));
 
     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);
 }
 
 static void gd_vcs_init(GtkDisplayState *s)

-- 
2.55.0