.

publish/src/app.rs

@@ -100,6 +100,7 @@ pub(crate) struct Publisher {
     abbreviated_datatypes: Vec<String>,
     window_id: window::Id,
     url_input: String,
+    url_input_valid: bool,
     navigator: Navigator<Url>,
     document: RdfSource<KeyedDataset<RowState>>,
     hovered_row: Option<QuadKey>,
@@ -157,6 +158,7 @@ impl Publisher {
                 abbreviated_datatypes,
                 window_id: id,
                 url_input: starting_url.to_string(),
+                url_input_valid: true,
                 navigator,
                 document,
                 hovered_row: None,
@@ -268,6 +270,11 @@ impl Publisher {
                 }
             }
             Message::URLInputChanged(value) => {
+                if Url::parse(&value).is_ok() {
+                    self.url_input_valid = true;
+                } else {
+                    self.url_input_valid = false;
+                }
                 self.url_input = value;
             }
             Message::URLInputSubmitted => {
@@ -868,7 +875,8 @@ impl Publisher {
         let address_input = iri_input(&self.curie_helper, "URL", None, &self.url_input)
             .on_input(Message::URLInputChanged)
             .on_submit(Message::URLInputSubmitted)
-            .on_control_click(Message::OpenQueryWindow(SearchResultClickAction::URLInput));
+            .on_control_click(Message::OpenQueryWindow(SearchResultClickAction::URLInput))
+            .style(crate::theme::styles::text_input::required(!self.url_input_valid));
 
         let mut rows: Vec<Element<Message>> = vec![];
         rows = self

publish/src/main.rs

@@ -4,6 +4,7 @@ mod rdf;
 mod windows;
 mod widget;
 mod navigator;
+mod theme;
 
 use crate::app::Publisher;
 use tracing_subscriber::layer::SubscriberExt;

publish/src/theme/mod.rs

@@ -0,0 +1 @@
+pub mod styles;

publish/src/theme/styles.rs

@@ -0,0 +1,19 @@
+pub mod text_input {
+    use iced::{color, Theme};
+    use iced::widget::text_input;
+    use iced::widget::text_input::{Status, Style};
+
+    pub fn required(invalid: bool) -> impl Fn(&Theme, Status) -> Style {
+        move |theme: &Theme, status| {
+            let danger = color!(255, 88, 97);
+            let default = text_input::default(theme, status);
+            let border = if invalid && matches!(status, Status::Focused { .. }) {
+                default.border.color(danger)
+            } else {
+                default.border
+            };
+
+            Style { border, ..default }
+        }
+    }
+}

publish/src/widget/iri_input.rs

@@ -1,12 +1,11 @@
-use iced::{alignment, keyboard, widget, Element, Event, Length, Rectangle, Size};
-use iced::advanced::{mouse, text, Shell};
+use iced::{alignment, keyboard, widget, Element, Event, Length, Rectangle, Size, Theme, Background, Border};
+use iced::advanced::{mouse, text, Shell, renderer};
 use iced::advanced::layout::{Limits, Node};
-use iced::advanced::renderer::Style;
 use iced::advanced::{Layout, Widget};
 use iced::advanced::widget::{tree, Tree};
 use iced::clipboard::Content;
 use iced::mouse::{Cursor, Interaction};
-use iced::widget::text_input::Catalog;
+use iced::widget::text_input::{Catalog, Status, Style, StyleFn};
 use crate::rdf::curie::CurieHelper;
 
 pub struct State {
@@ -79,6 +78,15 @@ where
         self.text_input = self.text_input.on_submit(message);
         self
     }
+
+    #[must_use]
+    pub fn style(mut self, style: impl Fn(&Theme, Status) -> Style + 'a) -> Self
+    where
+        Theme::Class<'a>: From<StyleFn<'a, Theme>>,
+    {
+        self.text_input = self.text_input.style(style);
+        self
+    }
 }
 
 impl<'a, Message, Theme, Renderer> From<IriInput<'a, Message, Theme, Renderer>>
@@ -116,7 +124,7 @@ where
         Widget::layout(&mut self.text_input, &mut tree.children[0], renderer, limits)
     }
 
-    fn draw(&self, tree: &Tree, renderer: &mut Renderer, theme: &Theme, style: &Style, layout: Layout<'_>, cursor: Cursor, viewport: &Rectangle) {
+    fn draw(&self, tree: &Tree, renderer: &mut Renderer, theme: &Theme, style: &renderer::Style, layout: Layout<'_>, cursor: Cursor, viewport: &Rectangle) {
         Widget::draw(&self.text_input, &tree.children[0], renderer, theme, style, layout, cursor, viewport)
     }