implement show_with_delay option

src/app/browser/window/tab/item/page.rs

@@ -29,7 +29,7 @@ use gtk::{
     Box,
 };
 use sqlite::Transaction;
-use std::{cell::RefCell, sync::Arc};
+use std::{cell::RefCell, sync::Arc, time::Duration};
 
 pub struct Page {
     id: GString,
@@ -548,7 +548,8 @@ impl Page {
                                                             // Final image size unknown, show loading widget
                                                             let status = content.set_status_loading(
                                                                 Some(&"Loading.."),
-                                                                None
+                                                                None,
+                                                                Some(Duration::from_secs(1)) // show if download time > 1 second
                                                             );
 
                                                             // Asynchronously move `InputStream` data from `SocketConnection` into the local `MemoryInputStream`

src/app/browser/window/tab/item/page/content.rs

@@ -13,6 +13,8 @@ use gtk::{
     prelude::{BoxExt, WidgetExt},
     Box, Orientation,
 };
+use std::time::Duration;
+
 pub struct Content {
     // GTK
     gobject: Box,
@@ -46,9 +48,14 @@ impl Content {
     }
 
     /// Loading placeholder
-    pub fn set_status_loading(&self, title: Option<&str>, description: Option<&str>) -> Status {
+    pub fn set_status_loading(
+        &self,
+        title: Option<&str>,
+        description: Option<&str>,
+        show_with_delay: Option<Duration>,
+    ) -> Status {
         self.clean();
-        let status = Status::new_loading(title, description);
+        let status = Status::new_loading(title, description, show_with_delay);
         self.gobject.append(status.gobject());
         status
     }

src/app/browser/window/tab/item/page/content/status.rs

@@ -5,6 +5,7 @@ use failure::Failure;
 use loading::Loading;
 
 use adw::StatusPage;
+use std::time::Duration;
 
 pub struct Status {
     gobject: StatusPage,
@@ -25,9 +26,15 @@ impl Status {
     /// Create new loading preset
     ///
     /// Useful as placeholder widget for async operations
-    pub fn new_loading(title: Option<&str>, description: Option<&str>) -> Self {
+    pub fn new_loading(
+        title: Option<&str>,
+        description: Option<&str>,
+        show_with_delay: Option<Duration>,
+    ) -> Self {
         Self {
-            gobject: Loading::new(title, description).gobject().clone(),
+            gobject: Loading::new(title, description, show_with_delay)
+                .gobject()
+                .clone(),
         }
     }
 

src/app/browser/window/tab/item/page/content/status/loading.rs

@@ -2,15 +2,20 @@ mod widget;
 use widget::Widget;
 
 use adw::StatusPage;
+use std::time::Duration;
 
 pub struct Loading {
     widget: Widget,
 }
 
 impl Loading {
-    pub fn new(title: Option<&str>, description: Option<&str>) -> Self {
+    pub fn new(
+        title: Option<&str>,
+        description: Option<&str>,
+        show_with_delay: Option<Duration>,
+    ) -> Self {
         Self {
-            widget: Widget::new(title, description),
+            widget: Widget::new(title, description, show_with_delay),
         }
     }
 

src/app/browser/window/tab/item/page/content/status/loading/widget.rs

@@ -1,4 +1,9 @@
 use adw::{Spinner, StatusPage};
+use gtk::{
+    glib::{timeout_add_local, ControlFlow},
+    prelude::WidgetExt,
+};
+use std::time::Duration;
 
 /// 16-64 (px)
 const SPINNER_SIZE: i32 = 64;
@@ -11,7 +16,13 @@ impl Widget {
     // Constructors
 
     /// Create new default widget configuration with options
-    pub fn new(title: Option<&str>, description: Option<&str>) -> Self {
+    ///
+    /// * use `show_with_delay` option on loading not take a while
+    pub fn new(
+        title: Option<&str>,
+        description: Option<&str>,
+        show_with_delay: Option<Duration>,
+    ) -> Self {
         let gobject = StatusPage::builder()
             .child(
                 &Spinner::builder()
@@ -27,6 +38,17 @@ impl Widget {
 
         gobject.set_description(description);
 
+        if let Some(duration) = show_with_delay {
+            gobject.set_visible(false);
+            timeout_add_local(duration, {
+                let this = gobject.clone();
+                move || {
+                    this.set_visible(true);
+                    ControlFlow::Break
+                }
+            });
+        }
+
         Self { gobject }
     }