Demo CSS cache invalidation failure.

demos/widget-factory/data/themes/theme1/flag.svg

@@ -0,0 +1,90 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   width="64"
+   height="64"
+   id="svg9373"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="flag.svg">
+  <metadata
+     id="metadata9418">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs9416" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1600"
+     inkscape:window-height="834"
+     id="namedview9414"
+     showgrid="false"
+     inkscape:snap-nodes="false"
+     inkscape:snap-bbox="true"
+     inkscape:zoom="1"
+     inkscape:cx="37.101481"
+     inkscape:cy="14.748665"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg9373">
+    <inkscape:grid
+       type="xygrid"
+       id="grid9641"
+       empspacing="5"
+       visible="true"
+       enabled="true"
+       snapvisiblegridlinesonly="true" />
+  </sodipodi:namedview>
+  <linearGradient
+     id="paint"
+     gradientUnits="userSpaceOnUse"
+     x1="14.5"
+     y1="99"
+     x2="119.5"
+     y2="99">
+    <stop
+       offset="0"
+       style="stop-color:#DA1800"
+       id="stop9404" />
+    <stop
+       offset="0.33"
+       style="stop-color:#B42D2D"
+       id="stop9406" />
+    <stop
+       offset="0.66"
+       style="stop-color:#FA1818"
+       id="stop9408" />
+    <stop
+       offset="1"
+       style="stop-color:#B42D2D"
+       id="stop9410" />
+  </linearGradient>
+  <path
+     style="fill:#2e3436;fill-opacity:1;stroke-width:1;stroke-miterlimit:4"
+     d="M 8.086319,0.175024 17.084785,0 l 0,3.104056 L 58.104384,20.741065 17.040446,38.378074 16.99727,64 8,64 z"
+     id="path9621"
+     inkscape:connector-curvature="0"
+     sodipodi:nodetypes="cccccccc" />
+</svg>

demos/widget-factory/data/themes/theme2/flag.svg

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="161" height="161">
+  <rect x="102.67" y="19" fill="#777777" stroke="#000000" stroke-width="3" width="36.67" height="8"/>
+  <rect x="98.67" y="60" fill="#777777" stroke="#000000" stroke-width="3" width="42.31" height="8"/>
+  <rect x="94.67" y="99" fill="#777777" stroke="#000000" stroke-width="3" width="50.9" height="8"/>
+  <polygon fill="#404040" points="151.64,126.87 144.6,126.87 132.03,27.19 139.07,27.19"/>
+  <polygon fill="#777777" points="148.1,127.17 144.6,126.87 132.03,27.19 135.53,27.48"/>
+  <polygon fill="none" stroke="#000000" stroke-width="3" points="151.64,126.87 144.6,126.87 132.03,27.19 139.07,27.19"/>
+  <polygon fill="#404040" points="90.86,126.87 97.9,126.87 110.47,27.19 103.43,27.19"/>
+  <polygon fill="#777777" points="90.86,126.87 94.9,126.87 107.47,27.19 103.43,27.19"/>
+  <polygon fill="none" stroke="#000000" stroke-width="3" points="90.86,126.87 97.9,126.87 110.47,27.19 103.43,27.19"/>
+  <path fill="#404040" stroke="#404040" d="M154.18,121.94h-5.24c0,0,0.98,24.81-4.89,24.81c-5.87,0-44.99,0-50.86,0c-4.33,0-4.93-13.47-4.95-20.56c-0.02,8.28,0.51,25.81,5.38,25.81c6.38,0,48.87,0,55.24,0C155.25,152,154.18,121.94,154.18,121.94z"/>
+  <path fill="#777777" stroke="#777777" d="M93.2,146.75c5.87,0,44.99,0,50.86,0c5.87,0,4.89-24.81,4.89-24.81H88.32h-0.01c0,0-0.07,1.72-0.06,4.25C88.27,133.27,88.88,146.75,93.2,146.75z"/>
+  <path fill="none" stroke="#000000" stroke-width="3.5" d="M93.63,152c6.38,0,48.87,0,55.24,0c6.37,0,5.31-30.06,5.31-30.06H88.32C88.32,121.94,87.25,152,93.63,152z"/>
+  <rect x="118.5" y="23" fill="#777777" stroke="#000000" stroke-width="2" width="7" height="80"/>
+  <path fill="#FFFFFF" d="M91.57,137.06c-1.31-13.13-1.31-13.43,24.89-11.81C91.57,127.16,93.48,125.55,91.57,137.06z"/>
+  <linearGradient id="paint" gradientUnits="userSpaceOnUse" x1="14.5" y1="99" x2="119.5" y2="99">
+    <stop offset="0" style="stop-color:#DA1800"/>
+    <stop offset="0.33" style="stop-color:#B42D2D"/>
+    <stop offset="0.66" style="stop-color:#FA1818"/>
+    <stop offset="1" style="stop-color:#B42D2D"/>
+  </linearGradient>
+  <path fill="url(#paint)" stroke="#000000" stroke-width="6" d="M67.35,13.97c-13.99,13.43-51.85,0-51.85,0V60.6v47.93c0,0,37.86,13.43,51.85,0c14-13.43,53.15,0,53.15,0V60.6V13.97C120.5,13.97,81.35,0.54,67.35,13.97z"/>
+</svg>

demos/widget-factory/widget-factory.c

@@ -1688,6 +1688,43 @@ set_up_context_popover (GtkWidget *widget,
   gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (gesture));
 }
 
+static void
+cache_invalidation_test_first_init ()
+{
+  GdkDisplay    *display;
+  GtkIconTheme  *icon_theme;
+
+  display = gdk_display_get_default ();
+  icon_theme = gtk_icon_theme_get_for_display (display);
+
+  gtk_icon_theme_add_resource_path (icon_theme, "/org/gtk/WidgetFactory4/theme1");
+}
+
+static void
+on_cache_invalidation_test_toggled (GtkToggleButton *button,
+                                    gpointer         user_data)
+{
+  GdkDisplay    *display;
+  GtkIconTheme  *icon_theme;
+  char        ***icon_resource_path;
+  guint          length;
+  char         **theme_path;
+
+  display = gdk_display_get_default ();
+  icon_theme = gtk_icon_theme_get_for_display (display);
+  icon_resource_path = gtk_icon_theme_get_resource_path (icon_theme);
+  length = g_strv_length (icon_resource_path);
+  theme_path = icon_resource_path [length - 1];
+
+  if (g_strcmp0 (theme_path, "/org/gtk/WidgetFactory4/theme2") == 0)
+    theme_path = "/org/gtk/WidgetFactory4/theme1";
+  else
+    theme_path = "/org/gtk/WidgetFactory4/theme2";
+
+  icon_resource_path[length - 1] = theme_path;
+  gtk_icon_theme_set_resource_path (icon_theme, icon_resource_path);
+}
+
 static void
 activate (GApplication *app)
 {
@@ -1752,9 +1789,12 @@ activate (GApplication *app)
                                               GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
   g_object_unref (provider);
 
+  cache_invalidation_test_first_init ();
+
   builder = gtk_builder_new ();
   scope = gtk_builder_cscope_new ();
   gtk_builder_cscope_add_callback_symbols (GTK_BUILDER_CSCOPE (scope),
+          "on_cache_invalidation_test_toggled", (GCallback)on_cache_invalidation_test_toggled,
           "on_entry_icon_release", (GCallback)on_entry_icon_release,
           "on_scale_button_value_changed", (GCallback)on_scale_button_value_changed,
           "on_record_button_toggled", (GCallback)on_record_button_toggled,

demos/widget-factory/widget-factory.css

@@ -24,3 +24,9 @@
 .border-ridge {
   border-width: 2px;
 }
+
+.cache-invalidation-test {
+  background-repeat:no-repeat;
+  background-image:-gtk-icontheme('flag');
+  background-position:center center;
+}

demos/widget-factory/widget-factory.gresource.xml

@@ -6,6 +6,12 @@
   <gresource prefix="/org/gtk/WidgetFactory4">
     <file>widget-factory.css</file>
   </gresource>
+  <gresource prefix="/org/gtk/WidgetFactory4/theme1">
+    <file alias="flag.svg">data/themes/theme1/flag.svg</file>
+  </gresource>
+  <gresource prefix="/org/gtk/WidgetFactory4/theme2">
+    <file alias="flag.svg">data/themes/theme2/flag.svg</file>
+  </gresource>
   <gresource prefix="/org/gtk/WidgetFactory4/gtk">
     <file preprocess="xml-stripblanks">help-overlay.ui</file>
   </gresource>

demos/widget-factory/widget-factory.ui

@@ -879,6 +879,26 @@ Suspendisse feugiat quam quis dolor accumsan cursus.</property>
                                 <property name="halign">center</property>
                               </object>
                             </child>
+                            <child>
+                              <object class="GtkBox">
+                                <child>
+                                  <object class="GtkToggleButton" id="cache_invalidation_test">
+                                    <property name="label">Test</property>
+                                    <property name="halign">fill</property>
+                                    <property name="hexpand">True</property>
+                                    <signal name="toggled" handler="on_cache_invalidation_test_toggled" swapped="no"/>
+                                  </object>
+                                </child>
+                                <child>
+                                  <object class="GtkButton">
+                                    <property name="halign">end</property>
+                                    <style>
+                                      <class name="cache-invalidation-test"/>
+                                    </style>
+                                  </object>
+                                </child>
+                              </object>
+                            </child>
                           </object>
                         </child>
                         <child>