Allow running without WebKitGTK installed

Resolves: RHEL-26698

optional-webkitgtk.patch

@@ -0,0 +1,69 @@
+diff --git a/meson.build b/meson.build
+index be1ccd4..116f145 100644
+--- a/meson.build
++++ b/meson.build
+@@ -21,7 +21,7 @@ gtk_x11_dep = dependency('gtk+-x11-3.0', required: get_option('X11'))
+ gtk_wayland_dep = dependency('gtk+-wayland-3.0', version: '>= 3.21.5', required: get_option('wayland'))
+ gtksourceview_dep = dependency('gtksourceview-4', version: '>=4.0.3')
+ harfbuzz_dep = dependency('harfbuzz', version: '>=0.9.9')
+-webkit_dep = dependency('webkit2gtk-4.0')
++webkit_dep = dependency('webkit2gtk-4.0', required: false)
+ 
+ bindir = join_paths(get_option('prefix'), get_option('bindir'))
+ datadir = join_paths(get_option('prefix'), get_option('datadir'))
+diff --git a/src/ui/main.js b/src/ui/main.js
+index b0cb7de..2aa0b71 100644
+--- a/src/ui/main.js
++++ b/src/ui/main.js
+@@ -39,7 +39,6 @@ pkg.require({
+     Pango: '1.0',
+     Soup: '2.4',
+     Sushi: '1.0',
+-    WebKit2: '4.0',
+ });
+ 
+ const {Gio, GLib} = imports.gi;
+diff --git a/src/viewers/html.js b/src/viewers/html.js
+index 3de4455..28d34de 100644
+--- a/src/viewers/html.js
++++ b/src/viewers/html.js
+@@ -23,11 +23,22 @@
+  *
+  */
+ 
+-const {Gtk, GLib, GObject, Sushi, WebKit2} = imports.gi;
++const {Gtk, GLib, GObject, Sushi} = imports.gi;
++
++var WebKit2;
++try {
++    imports.gi.versions.WebKit2 = '4.0';
++    WebKit2 = imports.gi.WebKit2;
++} catch(e) {
++}
++
++function _isAvailable() {
++    return WebKit2 !== undefined;
++}
+ 
+ const Renderer = imports.ui.renderer;
+ 
+-var Klass = GObject.registerClass({
++var Klass = _isAvailable() ? GObject.registerClass({
+     Implements: [Renderer.Renderer],
+     Properties: {
+         fullscreen: GObject.ParamSpec.boolean('fullscreen', '', '',
+@@ -63,8 +74,10 @@ var Klass = GObject.registerClass({
+     get moveOnClick() {
+         return false;
+     }
+-});
++}) : undefined;
+ 
+-var mimeTypes = [
+-    'text/html'
+-];
++var mimeTypes = [];
++if (_isAvailable())
++    mimeTypes = [
++        'text/html'
++    ];

sushi.spec

@@ -2,7 +2,7 @@
 
 Name:           sushi
 Version:        3.38.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A quick previewer for Nautilus
 
 License:        GPLv2+ with exceptions
@@ -14,6 +14,9 @@ Patch0:         drop-libmusicbrainz-dep.patch
 # https://gitlab.gnome.org/GNOME/sushi/-/merge_requests/30
 Patch1:         enable-sandbox.patch
 
+# https://gitlab.gnome.org/GNOME/sushi/-/merge_requests/53
+Patch2:         optional-webkitgtk.patch
+
 BuildRequires:  gettext
 BuildRequires:  gjs-devel
 BuildRequires:  meson
@@ -57,6 +60,10 @@ file manager.
 
 
 %changelog
+* Wed Mar 06 2024 Michael Catanzaro <mcatanzaro@redhat.com> - 3.38.1-3
+- Allow running without WebKitGTK installed
+  Resolves: RHEL-26698
+
 * Mon May 23 2022 Michael Catanzaro <mcatanzaro@redhat.com> - 3.38.1-2
 - Enable web process sandbox
   Resolves: #2070670