[gnome-control-center/T20771: 36/44] info: allow defining vendor specific logos

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit ad3a671f5f822a4edcd919df2e240cf1d50f8793
Author: Mario Sanchez Prada <mario endlessm com>
Date:   Thu Mar 9 05:59:06 2017 +0000

    info: allow defining vendor specific logos
    
    If a configuration file in /var/lib/gnome-control-center/vendor.conf
    is found, it defines the path to a branding-specific logo and such a
    file exists in disk, then gnome-control-center will use that one to
    override the default logo in the "info" panel.
    
    https://phabricator.endlessm.com/T15836

 configure.ac                         |   11 ++++++
 panels/info/Makefile.am              |    1 +
 panels/info/cc-info-overview-panel.c |   60 ++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2f30640..ecd8de4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,6 +49,17 @@ if test x$enable_documentation = xyes; then
 fi
 AM_CONDITIONAL(BUILD_DOCUMENTATION, test x$enable_documentation = xyes)
 
+AC_ARG_WITH(vendor-conf-file,
+            AS_HELP_STRING([--with-vendor-conf-file=<file>],
+                           [vendor conf file]))
+
+if ! test -z "$with_vendor_conf_file"; then
+   VENDOR_CONF_FILE=$with_vendor_conf_file
+else
+   VENDOR_CONF_FILE=${localstatedir}/lib/gnome-control-center/vendor.conf
+fi
+AC_SUBST(VENDOR_CONF_FILE)
+
 dnl Region panel
 savecppflags=$CPPFLAGS
 CPPFLAGS="$CPPFLAGS $X_CFLAGS"
diff --git a/panels/info/Makefile.am b/panels/info/Makefile.am
index a8c7d47..a790459 100644
--- a/panels/info/Makefile.am
+++ b/panels/info/Makefile.am
@@ -5,6 +5,7 @@ cappletname = info
 AM_CPPFLAGS =                                                  \
        $(PANEL_CFLAGS)                                         \
        $(INFO_PANEL_CFLAGS)                                    \
+       -DVENDOR_CONF_FILE="\"$(VENDOR_CONF_FILE)\""            \
        -DGNOMELOCALEDIR="\"$(datadir)/locale\""                \
        -DDATADIR="\"$(datadir)\""                              \
        -DGNOME_SESSION_DIR="\"$(gnome_session_libexecdir)\""   \
diff --git a/panels/info/cc-info-overview-panel.c b/panels/info/cc-info-overview-panel.c
index c1ddfc1..09d66f8 100644
--- a/panels/info/cc-info-overview-panel.c
+++ b/panels/info/cc-info-overview-panel.c
@@ -48,6 +48,9 @@
 
 #include "cc-info-overview-panel.h"
 
+#define VENDOR_INFO_GROUP    "Info"
+#define VENDOR_INFO_LOGO_KEY "logo"
+
 typedef enum {
   EOS_UPDATER_STATE_NONE = 0,
   EOS_UPDATER_STATE_READY,
@@ -133,6 +136,61 @@ typedef struct
 
 G_DEFINE_TYPE_WITH_PRIVATE (CcInfoOverviewPanel, cc_info_overview_panel, CC_TYPE_PANEL)
 
+static gchar *
+read_vendor_logo_path (void)
+{
+  g_autoptr(GKeyFile) keyfile = NULL;
+  g_autoptr(GError) error = NULL;
+  gchar *result = NULL;
+
+  /* VENDOR_CONF_FILE points to a keyfile containing vendor customization
+   * options. This panel will look for options under the "Info" group, and
+   * supports the following keys:
+   *   - logo (required): absolute path to the file with a logo for the vendor.
+   *
+   * This is how this file would look on a vendor image:
+   *
+   *   [Info]
+   *   logo=/path/to/the/image/with/the/logo.png
+   */
+  keyfile = g_key_file_new ();
+  if (!g_key_file_load_from_file (keyfile, VENDOR_CONF_FILE, G_KEY_FILE_NONE, &error))
+    {
+      if (!g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
+        g_warning ("Could not read file %s: %s", VENDOR_CONF_FILE, error->message);
+
+      return NULL;
+    }
+
+  result = g_key_file_get_string (keyfile, VENDOR_INFO_GROUP, VENDOR_INFO_LOGO_KEY, &error);
+  if (!result)
+    {
+      g_warning ("Could not read logo path from %s: %s", VENDOR_CONF_FILE, error->message);
+      return NULL;
+    }
+
+  return result;
+}
+
+static void
+update_vendor_specific_info (CcInfoOverviewPanel *self)
+{
+  CcInfoOverviewPanelPrivate *priv = cc_info_overview_panel_get_instance_private (self);
+  g_autofree gchar *vendor_logo_path = NULL;
+
+  vendor_logo_path = read_vendor_logo_path ();
+
+  if (!vendor_logo_path)
+    {
+      g_debug ("No vendor configuration found");
+      return;
+    }
+
+  /* Override the logo with the vendor one if it exists */
+  if (g_file_test (vendor_logo_path, G_FILE_TEST_EXISTS))
+    gtk_image_set_from_file (GTK_IMAGE (priv->system_image), vendor_logo_path);
+}
+
 static gboolean
 is_updater_state_spinning (EosUpdaterState state)
 {
@@ -1067,6 +1125,8 @@ info_overview_panel_setup_overview (CcInfoOverviewPanel *self)
   get_primary_disc_info (self);
 
   gtk_label_set_markup (GTK_LABEL (priv->graphics_label), priv->graphics_data->hardware_string);
+
+  update_vendor_specific_info (self);
 }
 
 static void