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wayland: Defer text_input.done on an idle
IBus naturally doesn't know how to implement the text-input protocol, and some input methods emit event streams that are incompatible with the protocol, if not assumed to be part of an grouped series of events. As IBus doesn't have any API to let us know about such groupings, let's fake it by adding a specially crafted idle callback. The idle callback has a known limitation; if there is an idle callback with a higher priority, that either doesn't remove itself, or reschedules itself before the next idle, we'll never get triggered. This, however, is unlikely to actually be the bigger problem in such situations, as it'd likely mean we'd have a 100% CPU bug. https://gitlab.gnome.org/GNOME/gtk/issues/1365
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@ -70,6 +70,8 @@ struct _MetaWaylandTextInput
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uint32_t content_type_purpose;
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uint32_t text_change_cause;
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gboolean enabled;
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guint done_idle_id;
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};
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struct _MetaWaylandTextInputFocus
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@ -114,6 +116,52 @@ increment_serial (MetaWaylandTextInput *text_input,
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GUINT_TO_POINTER (serial + 1));
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}
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static gboolean
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done_idle_cb (gpointer user_data)
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{
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ClutterInputFocus *focus = user_data;
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MetaWaylandTextInput *text_input;
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struct wl_resource *resource;
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text_input = META_WAYLAND_TEXT_INPUT_FOCUS (focus)->text_input;
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wl_resource_for_each (resource, &text_input->focus_resource_list)
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{
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zwp_text_input_v3_send_done (resource,
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lookup_serial (text_input, resource));
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}
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text_input->done_idle_id = 0;
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return G_SOURCE_REMOVE;
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}
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static void
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meta_wayland_text_input_focus_defer_done (ClutterInputFocus *focus)
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{
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MetaWaylandTextInput *text_input;
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text_input = META_WAYLAND_TEXT_INPUT_FOCUS (focus)->text_input;
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if (text_input->done_idle_id != 0)
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return;
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/* This operates on 3 principles:
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* - GDBus uses G_PRIORITY_DEFAULT to put messages in the thread default main
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* context.
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* - All relevant ClutterInputFocus methods are ultimately backed by
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* DBus methods inside IBus.
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* - We want to run .done after them all. The slightly lower
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* G_PRIORITY_DEFAULT + 1 priority should ensure we at least group
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* all messages seen so far.
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*
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* FIXME: .done may be delayed indefinitely if there's a high enough
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* priority idle source in the main loop. It's unlikely that
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* recurring idles run at this high priority though.
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*/
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text_input->done_idle_id = g_idle_add_full (G_PRIORITY_DEFAULT + 1,
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done_idle_cb, focus, NULL);
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}
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static void
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meta_wayland_text_input_focus_delete_surrounding (ClutterInputFocus *focus,
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guint cursor,
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@ -127,9 +175,9 @@ meta_wayland_text_input_focus_delete_surrounding (ClutterInputFocus *focus,
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wl_resource_for_each (resource, &text_input->focus_resource_list)
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{
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zwp_text_input_v3_send_delete_surrounding_text (resource, cursor, len);
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zwp_text_input_v3_send_done (resource,
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lookup_serial (text_input, resource));
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}
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meta_wayland_text_input_focus_defer_done (focus);
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}
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static void
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@ -145,9 +193,9 @@ meta_wayland_text_input_focus_commit_text (ClutterInputFocus *focus,
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{
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zwp_text_input_v3_send_preedit_string (resource, NULL, 0, 0);
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zwp_text_input_v3_send_commit_string (resource, text);
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zwp_text_input_v3_send_done (resource,
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lookup_serial (text_input, resource));
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}
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meta_wayland_text_input_focus_defer_done (focus);
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}
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static void
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@ -163,9 +211,9 @@ meta_wayland_text_input_focus_set_preedit_text (ClutterInputFocus *focus,
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wl_resource_for_each (resource, &text_input->focus_resource_list)
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{
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zwp_text_input_v3_send_preedit_string (resource, text, cursor, cursor);
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zwp_text_input_v3_send_done (resource,
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lookup_serial (text_input, resource));
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}
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meta_wayland_text_input_focus_defer_done (focus);
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}
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static void
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