initial gosub:// protocols are created

Cargo.toml

@@ -22,3 +22,4 @@ uuid = { version = "1.7.0", features = ["v4", "serde"] }
 chrono = "0.4.35"
 once_cell = "1.19.0"
 ureq = "2.9.1"
+url = "2.5.0"

src/dive/tab_manager.rs

@@ -1,5 +1,7 @@
+use anyhow::Error;
 use crate::dive::widgets::status_bar::TabInfo;
 use ureq;
+use url::Url;
 
 pub struct Tab {
     pub name: String,
@@ -103,22 +105,58 @@ impl TabManager {
 }
 
 fn load_content(url: &str) -> Result<String, anyhow::Error> {
-    if url.starts_with("file://") {
-        return Ok("File content is not supported".into());
+    let parts = match Url::parse(url) {
+        Ok(parts) => parts,
+        Err(e) => return Err(anyhow::Error::msg(format!("Invalid URL: {}", e))),
+    };
+
+    if parts.scheme() == "file" {
+        return Ok("File content is not yet supported".into());
+    }
+    if parts.scheme() == "data" {
+        return Ok("Data content is not yet supported".into());
+    }
+    if parts.scheme() == "gosub" {
+        return process_gosub_protocol(parts);
     }
 
-    if url.starts_with("http://") {
+    if parts.scheme() == "" || parts.scheme() == "https" {
         let content = ureq::get(url).call()?.into_string()?;
-
         return Ok(content);
     }
-
-    if url.starts_with("https://") {
-        // TLS
+    if parts.scheme() == "" || parts.scheme() == "http" {
+        log::warn!("Opening insecure connection to {}", url);
         let content = ureq::get(url).call()?.into_string()?;
-
         return Ok(content);
     }
 
+    // Always assume no protocol defaults to HTTPS://
+
     Ok("Unknown protocol".into())
 }
+
+fn process_gosub_protocol(url: Url) -> Result<String, Error> {
+    match url.host_str() {
+        Some("blank") => return Ok("This page is left intentionally blank".into()),
+        Some("help") => return Ok(gosub_help()),
+        Some("credits") => return Ok("Here be credits for the gosub engine".into()),
+        Some("settings") => return Ok("Here you can tinker with all kinds of dive and gosub settings".into()),
+        _ => return Ok("Unknown gosub protocol".into()),
+    }
+}
+
+fn gosub_help() -> String {
+    return r#"<h1>gosub://help</h1>
+
+    <p>This is the help page for the gosub engine</p>
+
+    <p>The following special gosub pages are supported:</p>
+
+    <table>
+      <tr><td><a target="_blank"href="gosub://blank">gosub://blank</td><td>Opens a blank page</td></tr>
+      <tr><td><a target="_blank"href="gosub://help">gosub://help</td><td>Displays this help page</td></tr>
+      <tr><td><a target="_blank" href="gosub://credits">gosub://credits</td><td>Displays credits of the Dive Browser and the Gosub Engine</td></tr>
+      <tr><td><a target="_blank" href="gosub://settings">gosub://settings</td><td>Displays the settings page</td></tr>
+    </table>
+    "#.into();
+}

src/dive/widgets/tabs.rs

@@ -3,12 +3,27 @@ use crate::dive::tab_manager::TabManager;
 use crate::dive::ui::get_layout_chunks;
 use crate::dive::widget_manager::Drawable;
 use crossterm::event::KeyEvent;
-use ratatui::layout::Layout;
+use ratatui::layout::{Layout, Rect};
 use ratatui::prelude::{Constraint, Direction, Stylize};
-use ratatui::widgets::{Block, Borders, Clear, ListState, Paragraph, Tabs, Wrap};
+use ratatui::widgets::{Block, Borders, Clear, ListState, Paragraph, Tabs, Widget, Wrap};
 use ratatui::Frame;
 use std::cell::RefCell;
 use std::rc::Rc;
+use ratatui::buffer::Buffer;
+
+#[derive(Debug, Default, Clone, Eq, PartialEq, Hash)]
+pub struct BackgroundClear;
+
+impl Widget for BackgroundClear {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        for x in area.left()..area.right() {
+            for y in area.top()..area.bottom() {
+                buf.get_mut(x, y).reset();
+                buf.get_mut(x, y).set_char('░');
+            }
+        }
+    }
+}
 
 pub struct TabsWidget {
     pub tab_manager: Rc<RefCell<TabManager>>,
@@ -60,6 +75,7 @@ impl Drawable for TabsWidget {
 
         let content = self.tab_manager.borrow().current().content.clone();
         let block = Block::default().borders(Borders::NONE).on_dark_gray();
+
         let paragraph = Paragraph::new(content)
             .block(block)
             .wrap(Wrap { trim: true });

src/main.rs

@@ -76,12 +76,6 @@ fn main() -> Result<()> {
     app.tab_manager
         .borrow_mut()
         .open("New Tab", "gosub://blank");
-    app.tab_manager
-        .borrow_mut()
-        .open("Second Tab", "https://gosub.io");
-    app.tab_manager
-        .borrow_mut()
-        .open("Third Tab", "https://news.ycombinator.com");
 
     let w1 = Widget::new(
         "splash",