Handle request errors using a new pane

data/ui/response_panel.blp

@@ -31,6 +31,20 @@ template $CarteroResponsePanel: Adw.Bin {
       };
     }
 
+    StackPage {
+      name: "error";
+
+      child: Adw.StatusPage error_page {
+        icon-name: "network-error-symbolic";
+        title: _("Request error");
+
+        child: Gtk.Label error_extra {
+          label: "PRUEBA";
+          selectable: true;
+        };
+      };
+    }
+
     StackPage {
       name: "response";
 

src/widgets/endpoint_pane.rs

@@ -471,6 +471,11 @@ impl EndpointPane {
         imp.extract_endpoint()
     }
 
+    pub fn show_error(&self, error: CarteroError) {
+        let imp = self.imp();
+        imp.response.show_error(error);
+    }
+
     /// Executes an HTTP request based on the current contents of the pane.
     ///
     /// TODO: Should actually the EndpointPane do the requests? This method

src/widgets/response_panel.rs

@@ -26,16 +26,19 @@ use serde_json::Value;
 use sourceview5::prelude::BufferExt;
 use sourceview5::LanguageManager;
 
+use crate::client::RequestError;
 use crate::entities::ResponseData;
+use crate::error::CarteroError;
 use crate::objects::KeyValueItem;
 use glib::subclass::types::ObjectSubclassIsExt;
 
 mod imp {
     use std::cell::RefCell;
 
+    use crate::error::CarteroError;
     use crate::widgets::{CodeView, ResponseHeaders, SearchBox};
-    use adw::prelude::*;
     use adw::subclass::bin::BinImpl;
+    use adw::{prelude::*, StatusPage};
     use glib::object::Cast;
     use glib::subclass::InitializingObject;
     use glib::Properties;
@@ -53,6 +56,10 @@ mod imp {
         #[template_child]
         stack: TemplateChild<gtk::Stack>,
         #[template_child]
+        error_page: TemplateChild<StatusPage>,
+        #[template_child]
+        error_extra: TemplateChild<Label>,
+        #[template_child]
         pub response_headers: TemplateChild<ResponseHeaders>,
         #[template_child]
         pub response_body: TemplateChild<CodeView>,
@@ -147,6 +154,14 @@ mod imp {
             self.search_revealer.set_visible(false);
             self.response_body.grab_focus();
         }
+
+        pub(super) fn show_error(&self, error: CarteroError) {
+            // TODO: Internationalize
+            let message = error.to_string();
+            self.error_page.set_description(Some(&message));
+            self.error_extra.set_visible(false);
+            self.stack.set_visible_child_name("error");
+        }
     }
 }
 
@@ -185,6 +200,11 @@ impl ResponsePanel {
         Object::builder().build()
     }
 
+    pub fn show_error(&self, error: CarteroError) {
+        let imp = self.imp();
+        imp.show_error(error);
+    }
+
     pub fn start_request(&self) {
         let imp = self.imp();
 

src/win.rs

@@ -476,7 +476,7 @@ mod imp {
                                 if let Some(pane) = window.current_pane().and_then(|e| e.endpoint())
                                 {
                                     if let Err(e) = pane.perform_request().await {
-                                        window.toast_error(e);
+                                        pane.show_error(e);
                                     }
                                 }
                             }