[gnome-text-editor] filemanager: add helper to talk to desktop File Manager

[Christian Hergert <chergert src gnome org>]

commit bb892b4b46dd848b530797d2948a88ba87ad2fab
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 5 14:47:03 2022 -0800

    filemanager: add helper to talk to desktop File Manager
    
    This will eventually allow us to open a file within the file manager such
    as Nautilus and browse directly to the file within the opened view.

 org.gnome.TextEditor.Devel.json |   1 +
 po/POTFILES.in                  |   1 +
 src/editor-file-manager.c       | 198 ++++++++++++++++++++++++++++++++++++++++
 src/editor-file-manager.h       |  30 ++++++
 src/meson.build                 |   1 +
 5 files changed, 231 insertions(+)
---
diff --git a/org.gnome.TextEditor.Devel.json b/org.gnome.TextEditor.Devel.json
index f514b9d..d5ab70c 100644
--- a/org.gnome.TextEditor.Devel.json
+++ b/org.gnome.TextEditor.Devel.json
@@ -9,6 +9,7 @@
         "--share=ipc",
         "--socket=fallback-x11",
         "--socket=wayland",
+        "--talk-name=org.freedesktop.FileManager1",
         "--talk-name=org.gtk.vfs",
         "--talk-name=org.gtk.vfs.*",
         "--filesystem=xdg-run/gvfsd",
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 7ff9d7f..035f5f9 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -7,6 +7,7 @@ src/editor-animation.c
 src/editor-application-actions.c
 src/editor-application.c
 src/editor-document.c
+src/editor-file-manager.c
 src/editor-info-bar.c
 src/editor-info-bar.ui
 src/editor-language-dialog.ui
diff --git a/src/editor-file-manager.c b/src/editor-file-manager.c
new file mode 100644
index 0000000..7517a91
--- /dev/null
+++ b/src/editor-file-manager.c
@@ -0,0 +1,198 @@
+/* editor-file-manager.c
+ *
+ * Copyright (C) 1995-2017 GIMP Authors
+ * Copyright (C) 2015-2022 Christian Hergert <christian hergert me>
+ * Copyright (C) 2020      Germán Poo-Caamaño <gpoo gnome org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib/gi18n.h>
+
+#if defined(G_OS_WIN32)
+/* This is a hack for Windows known directory support.
+ * DATADIR (autotools-generated constant) is a type defined in objidl.h
+ * so we must #undef it before including shlobj.h in order to avoid a
+ * name clash. */
+#undef DATADIR
+#include <windows.h>
+#include <shlobj.h>
+#endif
+
+#ifdef PLATFORM_OSX
+#include <AppKit/AppKit.h>
+#endif
+
+#include "editor-file-manager.h"
+
+#if !(defined(G_OS_WIN32) || defined(PLATFORM_OSX))
+static void
+show_items_cb (GObject      *source_object,
+               GAsyncResult *result,
+               gpointer      user_data)
+{
+  GDBusProxy *proxy = (GDBusProxy *)source_object;
+  g_autoptr(GVariant) reply = NULL;
+  g_autoptr(GError) error = NULL;
+
+  g_assert (G_IS_DBUS_PROXY (proxy));
+  g_assert (G_IS_ASYNC_RESULT (result));
+  g_assert (user_data == NULL);
+
+  if (!(reply = g_dbus_proxy_call_finish (proxy, result, &error)))
+    g_warning ("Failed to show items: %s", error->message);
+}
+#endif /* !(defined(G_OS_WIN32) || defined(PLATFORM_OSX)) */
+
+/* Copied from the GIMP */
+gboolean
+editor_file_manager_show (GFile   *file,
+                          GError **error)
+{
+  g_return_val_if_fail (G_IS_FILE (file), FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+#if defined(G_OS_WIN32)
+
+  {
+    gboolean ret;
+    char *filename;
+    int n;
+    LPWSTR w_filename = NULL;
+    ITEMIDLIST *pidl = NULL;
+
+    ret = FALSE;
+
+    /* Calling this function multiple times should do no harm, but it is
+       easier to put this here as it needs linking against ole32. */
+    CoInitialize (NULL);
+
+    filename = g_file_get_path (file);
+    if (!filename)
+      {
+        g_set_error_literal (error, G_FILE_ERROR, 0,
+                             _("File path is NULL"));
+        goto out;
+      }
+
+    n = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS,
+                             filename, -1, NULL, 0);
+    if (n == 0)
+      {
+        g_set_error_literal (error, G_FILE_ERROR, 0,
+                             _("Error converting UTF-8 filename to wide char"));
+        goto out;
+      }
+
+    w_filename = g_malloc_n (n + 1, sizeof (wchar_t));
+    n = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS,
+                             filename, -1,
+                             w_filename, (n + 1) * sizeof (wchar_t));
+    if (n == 0)
+      {
+        g_set_error_literal (error, G_FILE_ERROR, 0,
+                             _("Error converting UTF-8 filename to wide char"));
+        goto out;
+      }
+
+    pidl = ILCreateFromPathW (w_filename);
+    if (!pidl)
+      {
+        g_set_error_literal (error, G_FILE_ERROR, 0,
+                             _("ILCreateFromPath() failed"));
+        goto out;
+      }
+
+    SHOpenFolderAndSelectItems (pidl, 0, NULL, 0);
+    ret = TRUE;
+
+  out:
+    if (pidl)
+      ILFree (pidl);
+    g_free (w_filename);
+    g_free (filename);
+
+    return ret;
+  }
+
+#elif defined(PLATFORM_OSX)
+
+  {
+    gchar    *uri;
+    NSString *filename;
+    NSURL    *url;
+    gboolean  retval = TRUE;
+
+    uri = g_file_get_uri (file);
+    filename = [NSString stringWithUTF8String:uri];
+
+    url = [NSURL URLWithString:filename];
+    if (url)
+      {
+        NSArray *url_array = [NSArray arrayWithObject:url];
+
+        [[NSWorkspace sharedWorkspace] activateFileViewerSelectingURLs:url_array];
+      }
+    else
+      {
+        g_set_error (error, G_FILE_ERROR, 0,
+                     _("Cannot convert “%s” into a valid NSURL."), uri);
+        retval = FALSE;
+      }
+
+    g_free (uri);
+
+    return retval;
+  }
+
+#else /* UNIX */
+
+  {
+    g_autofree gchar *uri = g_file_get_uri (file);
+    g_autoptr(GVariantBuilder) builder = NULL;
+    g_autoptr(GDBusProxy) proxy = NULL;
+
+    proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
+                                           (G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES |
+                                            G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS |
+                                            G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START_AT_CONSTRUCTION),
+                                           NULL,
+                                           "org.freedesktop.FileManager1",
+                                           "/org/freedesktop/FileManager1",
+                                           "org.freedesktop.FileManager1",
+                                           NULL,
+                                           error);
+
+    /* Implausible */
+    if (proxy == NULL)
+      return FALSE;
+
+    builder = g_variant_builder_new (G_VARIANT_TYPE ("as"));
+    g_variant_builder_add (builder, "s", uri);
+    g_dbus_proxy_call (proxy,
+                       "ShowItems",
+                       g_variant_new ("(ass)", builder, ""),
+                       G_DBUS_CALL_FLAGS_NONE,
+                       -1,
+                       NULL,
+                       show_items_cb,
+                       NULL);
+
+    return TRUE;
+  }
+
+#endif
+}
diff --git a/src/editor-file-manager.h b/src/editor-file-manager.h
new file mode 100644
index 0000000..854c6e2
--- /dev/null
+++ b/src/editor-file-manager.h
@@ -0,0 +1,30 @@
+/* editor-file-manager.h
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+gboolean editor_file_manager_show (GFile   *file,
+                                   GError **error);
+
+G_END_DECLS
diff --git a/src/meson.build b/src/meson.build
index 851fd3e..5a36af0 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -8,6 +8,7 @@ editor_sources = [
   'editor-document.c',
   'editor-info-bar.c',
   'editor-frame-source.c',
+  'editor-file-manager.c',
   'editor-joined-menu.c',
   'editor-language-dialog.c',
   'editor-language-row.c',