[gnome-games] collections-page: Add search support for collections

[Alexander Mikhaylenko <alexm src gnome org>]

commit 241c1491e22c452e8f0ebdb1085f9190a0a74fa3
Author: Neville <nevilleantony98 gmail com>
Date:   Sat Aug 22 15:57:43 2020 +0530

    collections-page: Add search support for collections

 data/ui/collections-main-page.ui  |  1 +
 data/ui/collections-page.ui       |  2 ++
 src/ui/collections-main-page.vala | 67 +++++++++++++++++++++++++++++++++++++--
 src/ui/collections-page.vala      |  3 ++
 4 files changed, 70 insertions(+), 3 deletions(-)
---
diff --git a/data/ui/collections-main-page.ui b/data/ui/collections-main-page.ui
index 205f3e2f6..5b6383314 100644
--- a/data/ui/collections-main-page.ui
+++ b/data/ui/collections-main-page.ui
@@ -6,6 +6,7 @@
     <signal name="map" after="yes" handler="on_map"/>
     <signal name="unmap" after="no" handler="on_unmap"/>
     <signal name="size-allocate" after="no" handler="on_size_allocate"/>
+    <signal name="notify::is-search-mode" handler="on_search_mode_changed"/>
     <child>
       <object class="GtkScrolledWindow" id="scrolled_window">
         <property name="visible">True</property>
diff --git a/data/ui/collections-page.ui b/data/ui/collections-page.ui
index 1fdbd6d0c..4ae37f239 100644
--- a/data/ui/collections-page.ui
+++ b/data/ui/collections-page.ui
@@ -15,6 +15,8 @@
           <object class="GamesCollectionsMainPage" id="collections_main_page">
             <property name="visible">True</property>
             <property name="is-selection-mode" bind-source="GamesCollectionsPage" 
bind-property="is-selection-mode"/>
+            <property name="is-search-mode" bind-source="GamesCollectionsPage" 
bind-property="is-search-mode"/>
+            <property name="is-search-empty" bind-source="GamesCollectionsPage" 
bind-property="is-search-empty" bind-flags="bidirectional"/>
             <signal name="collection-activated" handler="on_collection_activated"/>
           </object>
         </child>
diff --git a/src/ui/collections-main-page.vala b/src/ui/collections-main-page.vala
index 29bbd4820..0bffe68d8 100644
--- a/src/ui/collections-main-page.vala
+++ b/src/ui/collections-main-page.vala
@@ -13,6 +13,7 @@ private class Games.CollectionsMainPage : Gtk.Bin {
        [GtkChild]
        private Gtk.ScrolledWindow scrolled_window;
 
+       private string[] filtering_terms;
        private Binding window_active_binding;
        private GenericSet<CollectionIconView> selected_collections;
 
@@ -41,6 +42,8 @@ private class Games.CollectionsMainPage : Gtk.Bin {
        }
 
        public bool is_selection_mode { get; set; }
+       public bool is_search_mode { get; set; }
+       public bool is_search_empty { get; set; }
 
        static construct {
                set_css_name ("gamescollectionsmainpage");
@@ -107,7 +110,11 @@ private class Games.CollectionsMainPage : Gtk.Bin {
        public void select_all () {
                foreach (var child in flow_box.get_children ()) {
                        var collection_icon_view = child as CollectionIconView;
-                       collection_icon_view.checked = collection_icon_view.collection is UserCollection;
+                       if (is_search_mode)
+                               collection_icon_view.checked = filtering_terms == null ||
+                                                              filter_collection 
(collection_icon_view.collection);
+                       else
+                               collection_icon_view.checked = collection_icon_view.collection is 
UserCollection;
                }
 
                selected_items_changed ();
@@ -155,13 +162,67 @@ private class Games.CollectionsMainPage : Gtk.Bin {
                collection_model.invalidate_sort ();
        }
 
+       public void set_filter (string[] filtering_terms) {
+               this.filtering_terms = filtering_terms;
+               invalidate_filter ();
+               update_search_empty ();
+       }
+
+       private void update_search_empty () {
+               if (!is_search_mode || filtering_terms == null) {
+                       is_search_empty = false;
+                       return;
+               }
+
+               for (var i = 0; i < collection_model.get_n_items (); i++) {
+                       var collection = collection_model.get_item (i) as Collection;
+                       var type = collection.get_collection_type ();
+
+                       if (type == Collection.CollectionType.PLACEHOLDER ||
+                          (type == Collection.CollectionType.AUTO && collection.is_empty))
+                               continue;
+
+                       if (collection.matches_search_terms (filtering_terms)) {
+                               is_search_empty = false;
+                               return;
+                       }
+               }
+
+               is_search_empty = true;
+       }
+
+       private bool filter_collection (Collection collection) {
+               return collection.matches_search_terms (filtering_terms);
+       }
+
        private bool collection_filter_func (Gtk.FlowBoxChild child) {
                var collection_icon_view = child as CollectionIconView;
                if (collection_icon_view == null)
                        return false;
 
-               return collection_icon_view.collection.get_collection_type () != AUTO ||
-                      !collection_icon_view.collection.is_empty;
+               var collection = collection_icon_view.collection;
+               var type = collection.get_collection_type ();
+
+               if (is_search_mode && filtering_terms.length != 0) {
+                       switch (type) {
+                       case Collection.CollectionType.AUTO:
+                               return !collection.is_empty && filter_collection (collection);
+
+                       case Collection.CollectionType.USER:
+                               return filter_collection (collection);
+
+                       case Collection.CollectionType.PLACEHOLDER:
+                               return false;
+                       }
+               }
+
+               return !collection_icon_view.collection.is_empty || type != Collection.CollectionType.AUTO;
+       }
+
+       [GtkCallback]
+       private void on_search_mode_changed () {
+               update_search_empty ();
+               invalidate_filter ();
        }
 
        [GtkCallback]
diff --git a/src/ui/collections-page.vala b/src/ui/collections-page.vala
index 202c389d0..7b3f86fe9 100644
--- a/src/ui/collections-page.vala
+++ b/src/ui/collections-page.vala
@@ -56,6 +56,7 @@ private class Games.CollectionsPage : Gtk.Bin {
        public bool is_subpage_open { get; set; }
        public bool is_selection_mode { get; set; }
        public bool is_showing_user_collection { get; set; }
+       public bool is_search_empty { get; set; }
        public bool can_swipe_back { get; set; }
        public string collection_title { get; set; }
        public string removed_notification_title { get; set; }
@@ -126,6 +127,8 @@ private class Games.CollectionsPage : Gtk.Bin {
        public void set_filter (string[] filtering_terms) {
                if (is_subpage_open)
                        collections_subpage.set_filter (filtering_terms);
+               else
+                       collections_main_page.set_filter (filtering_terms);
        }
 
        public Hdy.Deck get_collections_deck () {