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From 17648f0522910480b6c5dd4f5356ca1f6c160bf5 Mon Sep 17 00:00:00 2001
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From: Carlos Garnacho <carlosg@gnome.org>
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Date: Tue, 29 Mar 2022 22:48:19 +0200
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Subject: [PATCH] src: Fix refcounting issues
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Commit 5a455b1ead attempted to fix both GLib warnings around
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floating references and other presumed refcounting issues. However
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it missed 2 kinds of bugs:
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- The places that take an IBusText created from a static string
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were made to avoid freeing it afterwards, but the staticness refers
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to the string content, not the object itself.
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- The places that are documented to emit signals on floating object
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references used to do the following after signal emission:
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if (g_object_is_floating (object))
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g_object_unref (object)
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And did possibly trigger GLib warnings were changed to:
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if (g_object_is_floating (object))
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g_object_sink_ref (object);
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g_object_unref (object);
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Which fixes the GLib warning for floating references, but do
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unintendedly steal one reference away for non floating references.
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This commit is essentially a revert of commit 5a455b1ead, but
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addressing both things differently:
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- All label/tooltip/symbol IBusText properties in IBusProperty do
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now always sink the reference of the stored object.
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- All places documented as maybe using objects with a floating reference
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on signals changed to doing:
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if (g_object_is_floating (object)) {
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g_object_ref_sink (object);
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g_object_unref (object);
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}
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So the floating reference is owned and unreferenced without warnings,
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but already owned references are left unchanged.
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This addresses the possible GLib warnings, fixes the possible double
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unrefs happening on IBusText used in signals, and fixes the missing
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unrefs on IBusText objects created from static strings.
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BUG=https://github.com/ibus/ibus/issues/2393
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BUG=https://github.com/ibus/ibus/issues/2387
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---
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src/ibusinputcontext.c | 35 +++++++++++++++++++++--------------
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src/ibusproperty.c | 32 +++++++++++++++++---------------
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2 files changed, 38 insertions(+), 29 deletions(-)
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diff --git a/src/ibusinputcontext.c b/src/ibusinputcontext.c
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index 4b27551bd..7981de381 100644
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--- a/src/ibusinputcontext.c
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+++ b/src/ibusinputcontext.c
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@@ -549,9 +549,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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g_variant_unref (variant);
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g_signal_emit (context, context_signals[COMMIT_TEXT], 0, text);
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- if (g_object_is_floating (text))
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+ if (g_object_is_floating (text)) {
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g_object_ref_sink (text);
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- g_object_unref (text);
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+ g_object_unref (text);
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+ }
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return;
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}
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if (g_strcmp0 (signal_name, "UpdatePreeditText") == 0) {
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@@ -569,9 +570,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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cursor_pos,
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visible);
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- if (g_object_is_floating (text))
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+ if (g_object_is_floating (text)) {
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g_object_ref_sink (text);
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- g_object_unref (text);
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+ g_object_unref (text);
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+ }
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return;
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}
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if (g_strcmp0 (signal_name, "UpdatePreeditTextWithMode") == 0) {
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@@ -592,9 +594,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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visible,
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mode);
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- if (g_object_is_floating (text))
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+ if (g_object_is_floating (text)) {
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g_object_ref_sink (text);
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- g_object_unref (text);
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+ g_object_unref (text);
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+ }
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return;
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}
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@@ -621,9 +624,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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0,
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text,
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visible);
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- if (g_object_is_floating (text))
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+ if (g_object_is_floating (text)) {
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g_object_ref_sink (text);
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- g_object_unref (text);
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+ g_object_unref (text);
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+ }
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return;
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}
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@@ -640,9 +644,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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0,
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table,
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visible);
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- if (g_object_is_floating (table))
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+ if (g_object_is_floating (table)) {
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g_object_ref_sink (table);
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- g_object_unref (table);
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+ g_object_unref (table);
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+ }
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return;
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}
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@@ -659,9 +664,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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0,
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prop_list);
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- if (g_object_is_floating (prop_list))
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+ if (g_object_is_floating (prop_list)) {
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g_object_ref_sink (prop_list);
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- g_object_unref (prop_list);
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+ g_object_unref (prop_list);
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+ }
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return;
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}
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@@ -673,9 +679,10 @@ ibus_input_context_g_signal (GDBusProxy *proxy,
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g_signal_emit (context, context_signals[UPDATE_PROPERTY], 0, prop);
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- if (g_object_is_floating (prop))
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+ if (g_object_is_floating (prop)) {
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g_object_ref_sink (prop);
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- g_object_unref (prop);
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+ g_object_unref (prop);
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+ }
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return;
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}
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diff --git a/src/ibusproperty.c b/src/ibusproperty.c
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index 6d4ed088e..cd8a0e2a6 100644
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--- a/src/ibusproperty.c
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+++ b/src/ibusproperty.c
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@@ -336,20 +336,17 @@ ibus_property_destroy (IBusProperty *prop)
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prop->priv->icon = NULL;
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if (prop->priv->label) {
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- if (!ibus_text_get_is_static (prop->priv->label))
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- g_object_unref (prop->priv->label);
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+ g_object_unref (prop->priv->label);
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prop->priv->label = NULL;
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}
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if (prop->priv->symbol) {
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- if (!ibus_text_get_is_static (prop->priv->symbol))
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- g_object_unref (prop->priv->symbol);
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+ g_object_unref (prop->priv->symbol);
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prop->priv->symbol = NULL;
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}
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if (prop->priv->tooltip) {
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- if (!ibus_text_get_is_static (prop->priv->tooltip))
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- g_object_unref (prop->priv->tooltip);
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+ g_object_unref (prop->priv->tooltip);
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prop->priv->tooltip = NULL;
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}
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@@ -404,7 +401,7 @@ ibus_property_deserialize (IBusProperty *prop,
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g_variant_get_child (variant, retval++, "u", &prop->priv->type);
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GVariant *subvar = g_variant_get_child_value (variant, retval++);
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- if (prop->priv->label && !ibus_text_get_is_static (prop->priv->label)) {
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+ if (prop->priv->label) {
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g_object_unref (prop->priv->label);
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}
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prop->priv->label = IBUS_TEXT (ibus_serializable_deserialize (subvar));
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@@ -414,7 +411,7 @@ ibus_property_deserialize (IBusProperty *prop,
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ibus_g_variant_get_child_string (variant, retval++, &prop->priv->icon);
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subvar = g_variant_get_child_value (variant, retval++);
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- if (prop->priv->tooltip && !ibus_text_get_is_static (prop->priv->tooltip)) {
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+ if (prop->priv->tooltip) {
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g_object_unref (prop->priv->tooltip);
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}
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prop->priv->tooltip = IBUS_TEXT (ibus_serializable_deserialize (subvar));
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@@ -435,7 +432,7 @@ ibus_property_deserialize (IBusProperty *prop,
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/* Keep the serialized order for the compatibility when add new members. */
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subvar = g_variant_get_child_value (variant, retval++);
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- if (prop->priv->symbol && !ibus_text_get_is_static (prop->priv->symbol)) {
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+ if (prop->priv->symbol) {
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g_object_unref (prop->priv->symbol);
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}
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prop->priv->symbol = IBUS_TEXT (ibus_serializable_deserialize (subvar));
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@@ -567,7 +564,7 @@ ibus_property_set_label (IBusProperty *prop,
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g_assert (IBUS_IS_PROPERTY (prop));
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g_return_if_fail (label == NULL || IBUS_IS_TEXT (label));
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- if (prop->priv->label && !ibus_text_get_is_static (prop->priv->label)) {
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+ if (prop->priv->label) {
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g_object_unref (prop->priv->label);
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}
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@@ -575,8 +572,10 @@ ibus_property_set_label (IBusProperty *prop,
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prop->priv->label = ibus_text_new_from_static_string ("");
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}
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else {
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- prop->priv->label = g_object_ref_sink (label);
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+ prop->priv->label = label;
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}
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+
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+ g_object_ref_sink (prop->priv->label);
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}
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void
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@@ -586,7 +585,7 @@ ibus_property_set_symbol (IBusProperty *prop,
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g_assert (IBUS_IS_PROPERTY (prop));
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g_return_if_fail (symbol == NULL || IBUS_IS_TEXT (symbol));
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- if (prop->priv->symbol && !ibus_text_get_is_static (prop->priv->symbol)) {
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+ if (prop->priv->symbol) {
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g_object_unref (prop->priv->symbol);
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}
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@@ -594,8 +593,10 @@ ibus_property_set_symbol (IBusProperty *prop,
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prop->priv->symbol = ibus_text_new_from_static_string ("");
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}
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else {
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- prop->priv->symbol = g_object_ref_sink (symbol);
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+ prop->priv->symbol = symbol;
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}
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+
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+ g_object_ref_sink (prop->priv->symbol);
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}
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void
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@@ -615,7 +616,7 @@ ibus_property_set_tooltip (IBusProperty *prop,
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g_assert (IBUS_IS_PROPERTY (prop));
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g_assert (tooltip == NULL || IBUS_IS_TEXT (tooltip));
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- if (prop->priv->tooltip && !ibus_text_get_is_static (prop->priv->tooltip)) {
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+ if (prop->priv->tooltip) {
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g_object_unref (prop->priv->tooltip);
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}
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@@ -624,8 +625,9 @@ ibus_property_set_tooltip (IBusProperty *prop,
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}
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else {
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prop->priv->tooltip = tooltip;
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- g_object_ref_sink (prop->priv->tooltip);
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}
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+
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+ g_object_ref_sink (prop->priv->tooltip);
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}
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void
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