[fractal] file dialog: add a common filepicker dialog

[Jordan Petridis <jpetridis src gnome org>]

commit 985782b3b313a49a4074f4dbcf06b9e18ddf69a5
Author: Julian Sparber <julian sparber net>
Date:   Fri Dec 28 15:24:30 2018 +0100

    file dialog: add a common filepicker dialog

 fractal-gtk/po/POTFILES.in             |  1 +
 fractal-gtk/src/widgets/file_dialog.rs | 39 ++++++++++++++++++++++++++++++++++
 fractal-gtk/src/widgets/mod.rs         |  2 ++
 3 files changed, 42 insertions(+)
---
diff --git a/fractal-gtk/po/POTFILES.in b/fractal-gtk/po/POTFILES.in
index 90100879..aa37da14 100644
--- a/fractal-gtk/po/POTFILES.in
+++ b/fractal-gtk/po/POTFILES.in
@@ -84,6 +84,7 @@ fractal-gtk/src/widgets/autocomplete.rs
 fractal-gtk/src/widgets/avatar.rs
 fractal-gtk/src/widgets/divider.rs
 fractal-gtk/src/widgets/error_dialog.rs
+fractal-gtk/src/widgets/file_dialog.rs
 fractal-gtk/src/widgets/image.rs
 fractal-gtk/src/widgets/inline_player.rs
 fractal-gtk/src/widgets/media_viewer.rs
diff --git a/fractal-gtk/src/widgets/file_dialog.rs b/fractal-gtk/src/widgets/file_dialog.rs
new file mode 100644
index 00000000..bf14209b
--- /dev/null
+++ b/fractal-gtk/src/widgets/file_dialog.rs
@@ -0,0 +1,39 @@
+use gtk;
+use gtk::prelude::*;
+use gtk::ResponseType;
+use i18n::i18n;
+use std::path::PathBuf;
+
+pub fn save(parent: &gtk::Window, title: &str) -> Option<PathBuf> {
+    let file_chooser = gtk::FileChooserNative::new(
+        Some(i18n("Save media as").as_str()),
+        Some(parent),
+        gtk::FileChooserAction::Save,
+        Some(i18n("_Save").as_str()),
+        Some(i18n("_Cancel").as_str()),
+    );
+
+    file_chooser.set_current_folder(dirs::download_dir().unwrap_or_default());
+    file_chooser.set_current_name(title);
+    let response = file_chooser.run();
+    if ResponseType::from(response) == ResponseType::Accept {
+        return file_chooser.get_filename();
+    }
+    None
+}
+
+pub fn open(parent: &gtk::Window, title: &str) -> Option<PathBuf> {
+    let file_chooser = gtk::FileChooserNative::new(
+        Some(title),
+        Some(parent),
+        gtk::FileChooserAction::Open,
+        Some(i18n("_Select").as_str()),
+        Some(i18n("_Cancel").as_str()),
+    );
+
+    let response = file_chooser.run();
+    if gtk::ResponseType::from(response) == gtk::ResponseType::Accept {
+        return file_chooser.get_filename();
+    }
+    None
+}
diff --git a/fractal-gtk/src/widgets/mod.rs b/fractal-gtk/src/widgets/mod.rs
index a81256ea..04c6bbf8 100644
--- a/fractal-gtk/src/widgets/mod.rs
+++ b/fractal-gtk/src/widgets/mod.rs
@@ -3,6 +3,7 @@ mod autocomplete;
 pub mod avatar;
 mod divider;
 pub mod error_dialog;
+pub mod file_dialog;
 pub mod image;
 mod inline_player;
 pub mod media_viewer;
@@ -29,6 +30,7 @@ pub use self::avatar::AvatarData;
 pub use self::avatar::AvatarExt;
 pub use self::divider::NewMessageDivider;
 pub use self::error_dialog as ErrorDialog;
+pub use self::file_dialog as FileDialog;
 pub use self::inline_player::AudioPlayerWidget;
 pub use self::media_viewer::MediaViewer;
 pub use self::member::MemberBox;