File gnome-documents-bsc1063428-garbage-collection.p... of Package gnome-documents

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File gnome-documents-bsc1063428-garbage-collection.patch of Package gnome-documents (Revision 4a849b4364d6270c443d88d5b5e09706)

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From 96bd8f9f8b54bc4cee18299592108a9f3fb07c6c Mon Sep 17 00:00:00 2001
From: Debarshi Ray <debarshir@gnome.org>
Date: Tue, 14 Aug 2018 19:20:31 +0200
Subject: [PATCH] preview, selections: Be nice to the garbage collector during
 shutdown

GJS' garbage collector doesn't like having the virtual function for
GtkWidget::destroy overridden. Doing that either causes a crash or
leads to CRITICALs like these:
  Gjs-CRITICAL **: Attempting to call back into JSAPI during the
    sweeping phase of GC. This is most likely caused by not destroying
    a Clutter actor or Gtk+ widget with ::destroy signals connected,
    but can also be caused by using the destroy() or dispose() vfuncs.
    Because it would crash the application, it has been blocked and
    the JS callback not invoked.

For some reason unknown to me, connecting to the signal instead of
overriding the virtual function seems to be fine. This is backed by
gnome-shell commit 98b50fd9423e57 [1] and observed behaviour.

[1] https://gitlab.gnome.org/GNOME/gnome-shell/commit/98b50fd9423e57

https://bugzilla.gnome.org/show_bug.cgi?id=747506
---
 src/preview.js    | 79 +++++++++++++++++++++++------------------------
 src/selections.js |  8 ++---
 2 files changed, 43 insertions(+), 44 deletions(-)

diff --git a/src/preview.js b/src/preview.js
index a4975dc6..d436f276 100644
--- a/src/preview.js
+++ b/src/preview.js
@@ -73,6 +73,45 @@ var Preview = new Lang.Class({
 
         this._nightModeId = Application.application.connect('action-state-changed::night-mode',
             Lang.bind(this, this._updateNightMode));
+
+        this.connect('destroy', Lang.bind(this,
+            function() {
+                if (this._loadStartedId > 0) {
+                    Application.documentManager.disconnect(this._loadStartedId);
+                    this._loadStartedId = 0;
+                }
+                if (this._loadFinishedId > 0) {
+                    Application.documentManager.disconnect(this._loadFinishedId);
+                    this._loadFinishedId = 0;
+                }
+                if (this._loadErrorId > 0) {
+                    Application.documentManager.disconnect(this._loadErrorId);
+                    this._loadErrorId = 0;
+                }
+                if (this._passwordNeededId > 0) {
+                    Application.documentManager.disconnect(this._passwordNeededId);
+                    this._passwordNeededId = 0;
+                }
+                if (this.navControls) {
+                    this.navControls.destroy();
+                    this.navControls = null;
+                }
+
+                if (this._fsToolbar) {
+                    this._fsToolbar.destroy();
+                    this._fsToolbar = null;
+                }
+
+                if (this._fullscreenAction) {
+                    this._fullscreenAction.change_state(new GLib.Variant('b', false));
+                    this._fullscreenAction.disconnect(this._fsStateId);
+                }
+
+                if (this._nightModeId > 0) {
+                    Application.application.disconnect(this._nightModeId);
+                    this._nightModeId = 0;
+                }
+            }));
     },
 
     _getDefaultActions: function() {
@@ -205,46 +244,6 @@ var Preview = new Lang.Class({
         }
     },
 
-    vfunc_destroy: function() {
-        if (this._loadStartedId > 0) {
-            Application.documentManager.disconnect(this._loadStartedId);
-            this._loadStartedId = 0;
-        }
-        if (this._loadFinishedId > 0) {
-            Application.documentManager.disconnect(this._loadFinishedId);
-            this._loadFinishedId = 0;
-        }
-        if (this._loadErrorId > 0) {
-            Application.documentManager.disconnect(this._loadErrorId);
-            this._loadErrorId = 0;
-        }
-        if (this._passwordNeededId > 0) {
-            Application.documentManager.disconnect(this._passwordNeededId);
-            this._passwordNeededId = 0;
-        }
-        if (this.navControls) {
-            this.navControls.destroy();
-            this.navControls = null;
-        }
-
-        if (this._fsToolbar) {
-            this._fsToolbar.destroy();
-            this._fsToolbar = null;
-        }
-
-        if (this._fullscreenAction) {
-            this._fullscreenAction.change_state(new GLib.Variant('b', false));
-            this._fullscreenAction.disconnect(this._fsStateId);
-        }
-
-        if (this._nightModeId > 0) {
-            Application.application.disconnect(this._nightModeId);
-            this._nightModeId = 0;
-        }
-
-        this.parent();
-    },
-
     _createActionGroup: function() {
         let actions = this.createActions().concat(this._getDefaultActions());
         let actionGroup = new Gio.SimpleActionGroup();
diff --git a/src/selections.js b/src/selections.js
index d65dd2c4..b1813211 100644
--- a/src/selections.js
+++ b/src/selections.js
@@ -885,11 +885,11 @@ var SelectionToolbar = new Lang.Class({
         Application.selectionController.connect('selection-changed',
             Lang.bind(this, this._onSelectionChanged));
         this._onSelectionChanged();
-    },
 
-    vfunc_destroy: function() {
-        this._disconnectDocToPrint();
-        this.parent();
+        this.connect('destroy', Lang.bind(this,
+            function() {
+                this._disconnectDocToPrint();
+            }));
     },
 
     vfunc_hide: function() {
-- 
2.18.0

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File gnome-documents-bsc1063428-garbage-collection.patch of Package gnome-documents (Revision 4a849b4364d6270c443d88d5b5e09706)

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