[evince] shell: Set the path to filename as a tooltip in the headerbar

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 97c8f3c6f2b1e468a7a1259b81028380ddf0d78e
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Mon Jul 2 22:04:51 2018 -0400

    shell: Set the path to filename as a tooltip in the headerbar
    
    When there are multiple copies of a file with similar name, it
    is desirable to distinguish between them. We add their location as
    a tooltip because it is unobtrusive.
    
    Fixes #214

 shell/ev-window-title.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)
---
diff --git a/shell/ev-window-title.c b/shell/ev-window-title.c
index cf7d2a8f..e25fb40f 100644
--- a/shell/ev-window-title.c
+++ b/shell/ev-window-title.c
@@ -1,6 +1,7 @@
 /* this file is part of evince, a gnome document viewer
  *
  *  Copyright (C) 2005 Red Hat, Inc
+ *  Copyright (C) 2018 Germán Poo-Caamaño <gpoo gnome org>
  *
  * Evince is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by
@@ -23,7 +24,9 @@
 
 #include <string.h>
 #include <gio/gio.h>
+#include <glib.h>
 #include <glib/gi18n.h>
+#include <glib/gprintf.h>
 
 /* Known backends (for bad extensions fix) */
 #define EV_BACKEND_PS  "PSDocument"
@@ -41,7 +44,8 @@ struct _EvWindowTitle
        EvWindowTitleType type;
        EvDocument *document;
        char *filename;
-        char *doc_title;
+       char *doc_title;
+       char *dirname;
 };
 
 static const BadTitleEntry bad_extensions[] = {
@@ -136,6 +140,9 @@ ev_window_title_update (EvWindowTitle *window_title)
                        gtk_header_bar_set_title (toolbar, title_header);
                        gtk_header_bar_set_subtitle (toolbar, subtitle);
                }
+               if (window_title->dirname)
+                       gtk_widget_set_tooltip_text (GTK_WIDGET (toolbar),
+                                                    window_title->dirname);
                break;
        case EV_WINDOW_TITLE_PASSWORD: {
                 gchar *password_title;
@@ -189,6 +196,7 @@ document_destroyed_cb (EvWindowTitle *window_title,
 {
         window_title->document = NULL;
         g_clear_pointer (&window_title->doc_title, g_free);
+        g_clear_pointer (&window_title->dirname, g_free);
 }
 
 void
@@ -203,9 +211,12 @@ ev_window_title_set_document (EvWindowTitle *window_title,
        window_title->document = document;
         g_object_weak_ref (G_OBJECT (window_title->document), (GWeakNotify)document_destroyed_cb, 
window_title);
         g_clear_pointer (&window_title->doc_title, g_free);
+        g_clear_pointer (&window_title->dirname, g_free);
 
        if (window_title->document != NULL) {
                gchar *doc_title;
+               gchar *filepath;
+               gchar *dirname;
 
                doc_title = g_strdup (ev_document_get_title (window_title->document));
 
@@ -220,6 +231,14 @@ ev_window_title_set_document (EvWindowTitle *window_title,
                                 g_free (doc_title);
                         }
                }
+
+               filepath = g_filename_from_uri (ev_document_get_uri (window_title->document),
+                                               NULL, NULL);
+               dirname = g_path_get_dirname (filepath);
+               g_free (filepath);
+
+               if (dirname)
+                       window_title->dirname = dirname;
        }
 
        ev_window_title_update (window_title);
@@ -245,5 +264,6 @@ ev_window_title_free (EvWindowTitle *window_title)
                 g_object_weak_unref (G_OBJECT (window_title->document), (GWeakNotify)document_destroyed_cb, 
window_title);
         g_free (window_title->doc_title);
        g_free (window_title->filename);
+       g_free (window_title->dirname);
        g_free (window_title);
 }