[gnome-software/1005-add-option-for-packaging-format-preference] gs-details-page: Add option for packaging format preference

[Milan Crha <mcrha src gnome org>]

commit de16f79c9634b2699a9aae1426ced1ec490348b5
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jul 27 12:33:31 2021 +0200

    gs-details-page: Add option for packaging format preference
    
    The details page preselects the origin based on the preference
    of the packaging format, which can be set by a user or by a packager.
    
    Closes https://gitlab.gnome.org/GNOME/gnome-software/-/issues/1005

 data/org.gnome.software.gschema.xml |   4 ++
 src/gs-details-page.c               | 125 +++++++++++++++++++++++++++++++++++-
 2 files changed, 127 insertions(+), 2 deletions(-)
---
diff --git a/data/org.gnome.software.gschema.xml b/data/org.gnome.software.gschema.xml
index 36a219c12..2a3f64e4f 100644
--- a/data/org.gnome.software.gschema.xml
+++ b/data/org.gnome.software.gschema.xml
@@ -139,6 +139,10 @@
       <default>false</default>
       <summary>Install the AppStream files to a system-wide location for all users</summary>
     </key>
+    <key name="packaging-format-preference" type="as">
+      <default>['']</default>
+      <summary>The preference of the packaging format</summary>
+    </key>
     <child name="auth" schema="org.gnome.software.auth"/>
   </schema>
   <schema id="org.gnome.software.auth" gettext-domain="gnome-software">
diff --git a/src/gs-details-page.c b/src/gs-details-page.c
index 702a40ac2..8f30debbc 100644
--- a/src/gs-details-page.c
+++ b/src/gs-details-page.c
@@ -79,6 +79,8 @@ struct _GsDetailsPage
        GtkSizeGroup            *size_group_origin_popover;
        GsOdrsProvider          *odrs_provider;  /* (nullable) (owned), NULL if reviews are disabled */
        GAppInfoMonitor         *app_info_monitor; /* (owned) */
+       GHashTable              *packaging_format_preference; /* gchar * ~> gint */
+       gboolean                 origin_by_packaging_format;
 
        GtkWidget               *application_details_icon;
        GtkWidget               *application_details_summary;
@@ -648,6 +650,34 @@ app_origin_equal (GsApp *a,
        return TRUE;
 }
 
+static gint
+sort_by_packaging_format_preference (GsApp *app1,
+                                    GsApp *app2,
+                                    gpointer user_data)
+{
+       GHashTable *preference = user_data;
+       const gchar *packaging_format_raw1 = gs_app_get_packaging_format_raw (app1);
+       const gchar *packaging_format_raw2 = gs_app_get_packaging_format_raw (app2);
+       gint index1, index2;
+
+       if (g_strcmp0 (packaging_format_raw1, packaging_format_raw2) == 0)
+               return 0;
+
+       if (packaging_format_raw1 == NULL || packaging_format_raw2 == NULL)
+               return packaging_format_raw1 == NULL ? -1 : 1;
+
+       index1 = GPOINTER_TO_INT (g_hash_table_lookup (preference, packaging_format_raw1));
+       index2 = GPOINTER_TO_INT (g_hash_table_lookup (preference, packaging_format_raw2));
+
+       if (index1 == index2)
+               return 0;
+
+       if (index1 == 0 || index2 == 0)
+               return index1 == 0 ? -1 : 1;
+
+       return index1 - index2;
+}
+
 static void
 gs_details_page_get_alternates_cb (GObject *source_object,
                                    GAsyncResult *res,
@@ -659,7 +689,12 @@ gs_details_page_get_alternates_cb (GObject *source_object,
        g_autoptr(GsAppList) list = NULL;
        g_autofree gchar *origin_ui = NULL;
        gboolean instance_changed = FALSE;
+       gboolean origin_by_packaging_format = self->origin_by_packaging_format;
+       GtkWidget *select_row = NULL;
+       GtkWidget *origin_row_by_packaging_format = NULL;
+       gint origin_row_by_packaging_format_index = 0;
 
+       self->origin_by_packaging_format = FALSE;
        gs_container_remove_all (GTK_CONTAINER (self->origin_popover_list_box));
 
        /* Did we switch away from the page in the meantime? */
@@ -710,8 +745,11 @@ gs_details_page_get_alternates_cb (GObject *source_object,
 
        /* add the local file to the list so that we can carry it over when
         * switching between alternates */
-       if (self->app_local_file != NULL)
+       if (self->app_local_file != NULL) {
                gs_app_list_add (list, self->app_local_file);
+               /* Do not allow change of the app by the packaging format when it's a local file */
+               origin_by_packaging_format = FALSE;
+       }
 
        /* no alternates to show */
        if (gs_app_list_length (list) < 2) {
@@ -719,6 +757,13 @@ gs_details_page_get_alternates_cb (GObject *source_object,
                return;
        }
 
+       /* Do not allow change of the app by the packaging format when it's installed */
+       origin_by_packaging_format = origin_by_packaging_format &&
+               self->app != NULL && gs_app_get_state (self->app) != GS_APP_STATE_INSTALLED;
+
+       if (g_hash_table_size (self->packaging_format_preference) > 0)
+               gs_app_list_sort (list, sort_by_packaging_format_preference, 
self->packaging_format_preference);
+
        for (guint i = 0; i < gs_app_list_length (list); i++) {
                GsApp *app = gs_app_list_index (list, i);
                GtkWidget *row = gs_origin_popover_row_new (app);
@@ -735,13 +780,36 @@ gs_details_page_get_alternates_cb (GObject *source_object,
                                self->app = g_object_ref (app);
                                instance_changed = TRUE;
                        }
-                       gs_origin_popover_row_set_selected (GS_ORIGIN_POPOVER_ROW (row), TRUE);
+                       select_row = row;
                }
                gs_origin_popover_row_set_size_group (GS_ORIGIN_POPOVER_ROW (row),
                                                      self->size_group_origin_popover);
                gtk_container_add (GTK_CONTAINER (self->origin_popover_list_box), row);
+
+               if (origin_by_packaging_format) {
+                       const gchar *packaging_format = gs_app_get_packaging_format_raw (app);
+                       gint index = GPOINTER_TO_INT (g_hash_table_lookup (self->packaging_format_preference, 
packaging_format));
+                       if (index > 0 && (index < origin_row_by_packaging_format_index || 
origin_row_by_packaging_format_index == 0)) {
+                               origin_row_by_packaging_format_index = index;
+                               origin_row_by_packaging_format = row;
+                       }
+               }
        }
 
+       if (origin_row_by_packaging_format) {
+               GsOriginPopoverRow *row = GS_ORIGIN_POPOVER_ROW (origin_row_by_packaging_format);
+               GsApp *app = gs_origin_popover_row_get_app (row);
+               select_row = origin_row_by_packaging_format;
+               if (app != self->app) {
+                       g_clear_object (&self->app);
+                       self->app = g_object_ref (app);
+                       instance_changed = TRUE;
+               }
+       }
+
+       if (select_row)
+               gs_origin_popover_row_set_selected (GS_ORIGIN_POPOVER_ROW (select_row), TRUE);
+
        origin_ui = gs_app_get_origin_ui (self->app);
        if (origin_ui != NULL)
                gtk_label_set_text (GTK_LABEL (self->origin_button_label), origin_ui);
@@ -1679,6 +1747,7 @@ gs_details_page_set_local_file (GsDetailsPage *self, GFile *file)
        gs_details_page_set_state (self, GS_DETAILS_PAGE_STATE_LOADING);
        g_clear_object (&self->app_local_file);
        g_clear_object (&self->app);
+       self->origin_by_packaging_format = FALSE;
        plugin_job = gs_plugin_job_newv (GS_PLUGIN_ACTION_FILE_TO_APP,
                                         "file", file,
                                         "refine-flags", GS_DETAILS_PAGE_REFINE_FLAGS,
@@ -1696,6 +1765,7 @@ gs_details_page_set_url (GsDetailsPage *self, const gchar *url)
        gs_details_page_set_state (self, GS_DETAILS_PAGE_STATE_LOADING);
        g_clear_object (&self->app_local_file);
        g_clear_object (&self->app);
+       self->origin_by_packaging_format = FALSE;
        plugin_job = gs_plugin_job_newv (GS_PLUGIN_ACTION_URL_TO_APP,
                                         "search", url,
                                         "refine-flags", GS_DETAILS_PAGE_REFINE_FLAGS |
@@ -1770,9 +1840,32 @@ origin_popover_row_activated_cb (GtkListBox *list_box,
        }
 }
 
+static void
+gs_details_page_read_packaging_format_preference (GsDetailsPage *self)
+{
+       g_auto(GStrv) preference = NULL;
+       gint ii;
+
+       g_hash_table_remove_all (self->packaging_format_preference);
+
+       preference = g_settings_get_strv (self->settings, "packaging-format-preference");
+       if (preference == NULL || preference[0] == NULL)
+               return;
+
+       for (ii = 0; preference[ii] != NULL; ii++) {
+               /* Using 'ii + 1' to easily distinguish between "not found" and "the first" index */
+               g_hash_table_insert (self->packaging_format_preference, g_strdup (preference[ii]), 
GINT_TO_POINTER (ii + 1));
+       }
+}
+
 static void
 settings_changed_cb (GsDetailsPage *self, const gchar *key, gpointer data)
 {
+       if (g_strcmp0 (key, "packaging-format-preference") == 0) {
+               gs_details_page_read_packaging_format_preference (self);
+               return;
+       }
+
        if (self->app == NULL)
                return;
        if (g_strcmp0 (key, "show-nonfree-ui") == 0) {
@@ -1806,6 +1899,7 @@ gs_details_page_set_app (GsDetailsPage *self, GsApp *app)
 
        /* save GsApp */
        _set_app (self, app);
+       self->origin_by_packaging_format = TRUE;
        gs_details_page_load_stage1 (self);
 }
 
@@ -2148,6 +2242,30 @@ gs_details_page_setup (GsPage *page,
        return TRUE;
 }
 
+static guint
+gs_details_page_strcase_hash (gconstpointer key)
+{
+       const gchar *ptr;
+       guint hsh = 0, gg;
+
+       for (ptr = (const gchar *) key; *ptr != '\0'; ptr++) {
+               hsh = (hsh << 4) + g_ascii_toupper (*ptr);
+               if ((gg = hsh & 0xf0000000)) {
+                       hsh = hsh ^ (gg >> 24);
+                       hsh = hsh ^ gg;
+               }
+       }
+
+       return hsh;
+}
+
+static gboolean
+gs_details_page_strcase_equal (gconstpointer key1,
+                              gconstpointer key2)
+{
+       return g_ascii_strcasecmp ((const gchar *) key1, (const gchar *) key2) == 0;
+}
+
 static void
 gs_details_page_get_property (GObject    *object,
                               guint       prop_id,
@@ -2348,6 +2466,7 @@ gs_details_page_init (GsDetailsPage *self)
        /* setup networking */
        self->session = soup_session_new_with_options (SOUP_SESSION_USER_AGENT, gs_user_agent (),
                                                       NULL);
+       self->packaging_format_preference = g_hash_table_new_full (gs_details_page_strcase_hash, 
gs_details_page_strcase_equal, g_free, NULL);
        self->settings = g_settings_new ("org.gnome.software");
        g_signal_connect_swapped (self->settings, "changed",
                                  G_CALLBACK (settings_changed_cb),
@@ -2368,6 +2487,8 @@ gs_details_page_init (GsDetailsPage *self)
                          G_CALLBACK (version_history_list_row_activated_cb), self);
 
        gs_page_set_header_end_widget (GS_PAGE (self), self->origin_box);
+
+       gs_details_page_read_packaging_format_preference (self);
 }
 
 GsDetailsPage *