If the terminal window has less than 24 lines, then an error message is displayed in the auth activity

CHANGELOG.md

@@ -31,6 +31,9 @@ Released on FIXME: ??
   - **Status bar improvements**
     - "Show hidden files" in status bar
     - Status bar has now been splitted into two, one for each explorer tab
+  - **Error message if terminal window is too small**
+    - If the terminal window has less than 24 lines, then an error message is displayed in the auth activity
+    - Changed auth layout to absolute sizes
 - Bugfix:
   - Fixed broken input cursor when typing UTF8 characters (tui-realm 0.3.2)
   - Fixed [Issue 44](https://github.com/veeso/termscp/issues/44): Could not move files to other paths in FTP

src/host/mod.rs

@@ -831,7 +831,9 @@ mod tests {
     use crate::utils::test_helpers::{make_dir_at, make_file_at};
 
     use pretty_assertions::assert_eq;
+    #[cfg(any(target_os = "unix", target_os = "macos", target_os = "linux"))]
     use std::fs::File;
+    #[cfg(any(target_os = "unix", target_os = "macos", target_os = "linux"))]
     use std::io::Write;
 
     #[cfg(any(target_os = "unix", target_os = "macos", target_os = "linux"))]

src/ui/activities/auth/misc.rs

@@ -68,4 +68,16 @@ impl AuthActivity {
     pub(super) fn is_port_standard(port: u16) -> bool {
         port < 1024
     }
+
+    /// ### check_minimum_window_size
+    ///
+    /// Check minimum window size window
+    pub(super) fn check_minimum_window_size(&mut self, height: u16) {
+        if height < 24 {
+            // Mount window error
+            self.mount_size_err();
+        } else {
+            self.umount_size_err();
+        }
+    }
 }

src/ui/activities/auth/mod.rs

@@ -43,6 +43,7 @@ use crate::ui::context::FileTransferParams;
 use crate::utils::git;
 
 // Includes
+use crossterm::event::Event;
 use crossterm::terminal::{disable_raw_mode, enable_raw_mode};
 use tuirealm::{Update, View};
 
@@ -53,6 +54,7 @@ const COMPONENT_TEXT_NEW_VERSION: &str = "TEXT_NEW_VERSION";
 const COMPONENT_TEXT_FOOTER: &str = "TEXT_FOOTER";
 const COMPONENT_TEXT_HELP: &str = "TEXT_HELP";
 const COMPONENT_TEXT_ERROR: &str = "TEXT_ERROR";
+const COMPONENT_TEXT_SIZE_ERR: &str = "TEXT_SIZE_ERR";
 const COMPONENT_INPUT_ADDR: &str = "INPUT_ADDRESS";
 const COMPONENT_INPUT_PORT: &str = "INPUT_PORT";
 const COMPONENT_INPUT_USERNAME: &str = "INPUT_USERNAME";
@@ -199,6 +201,10 @@ impl Activity for AuthActivity {
         if let Ok(Some(event)) = self.context.as_ref().unwrap().input_hnd.read_event() {
             // Set redraw to true
             self.redraw = true;
+            // Handle on resize
+            if let Event::Resize(_, h) = event {
+                self.check_minimum_window_size(h);
+            }
             // Handle event on view and update
             let msg = self.view.on(event);
             self.update(msg);

src/ui/activities/auth/update.rs

@@ -32,7 +32,7 @@ use super::{
     COMPONENT_INPUT_PORT, COMPONENT_INPUT_USERNAME, COMPONENT_RADIO_BOOKMARK_DEL_BOOKMARK,
     COMPONENT_RADIO_BOOKMARK_DEL_RECENT, COMPONENT_RADIO_BOOKMARK_SAVE_PWD,
     COMPONENT_RADIO_PROTOCOL, COMPONENT_RADIO_QUIT, COMPONENT_RECENTS_LIST, COMPONENT_TEXT_ERROR,
-    COMPONENT_TEXT_HELP,
+    COMPONENT_TEXT_HELP, COMPONENT_TEXT_SIZE_ERR,
 };
 use crate::ui::keymap::*;
 use tuirealm::components::InputPropsBuilder;
@@ -306,6 +306,8 @@ impl Update for AuthActivity {
                     self.umount_quit();
                     None
                 }
+                // -- text size error; block everything
+                (COMPONENT_TEXT_SIZE_ERR, _) => None,
                 // On submit on any unhandled (connect)
                 (_, Msg::OnSubmit(_)) | (_, &MSG_KEY_ENTER) => {
                     // Match <ENTER> key for all other components

src/ui/activities/auth/view.rs

@@ -234,14 +234,17 @@ impl AuthActivity {
     pub(super) fn view(&mut self) {
         let mut ctx: Context = self.context.take().unwrap();
         let _ = ctx.terminal.draw(|f| {
+            // Check window size
+            let height: u16 = f.size().height;
+            self.check_minimum_window_size(height);
             // Prepare chunks
             let chunks = Layout::default()
                 .direction(Direction::Vertical)
                 .margin(1)
                 .constraints(
                     [
-                        Constraint::Percentage(70), // Auth Form
-                        Constraint::Percentage(30), // Bookmarks
+                        Constraint::Length(21), // Auth Form
+                        Constraint::Min(3),     // Bookmarks
                     ]
                     .as_ref(),
                 )
@@ -303,6 +306,14 @@ impl AuthActivity {
                     self.view.render(super::COMPONENT_TEXT_ERROR, f, popup);
                 }
             }
+            if let Some(props) = self.view.get_props(super::COMPONENT_TEXT_SIZE_ERR) {
+                if props.visible {
+                    let popup = draw_area_in(f.size(), 80, 20);
+                    f.render_widget(Clear, popup);
+                    // make popup
+                    self.view.render(super::COMPONENT_TEXT_SIZE_ERR, f, popup);
+                }
+            }
             if let Some(props) = self.view.get_props(super::COMPONENT_RADIO_QUIT) {
                 if props.visible {
                     // make popup
@@ -478,6 +489,38 @@ impl AuthActivity {
         self.view.umount(super::COMPONENT_TEXT_ERROR);
     }
 
+    /// ### mount_size_err
+    ///
+    /// Mount size error
+    pub(super) fn mount_size_err(&mut self) {
+        // Mount
+        self.view.mount(
+            super::COMPONENT_TEXT_SIZE_ERR,
+            Box::new(MsgBox::new(
+                MsgBoxPropsBuilder::default()
+                    .with_foreground(Color::Red)
+                    .with_borders(Borders::ALL, BorderType::Thick, Color::Red)
+                    .bold()
+                    .with_texts(
+                        None,
+                        vec![TextSpan::from(
+                            "termscp requires at least 24 lines of height to run",
+                        )],
+                    )
+                    .build(),
+            )),
+        );
+        // Give focus to error
+        self.view.active(super::COMPONENT_TEXT_SIZE_ERR);
+    }
+
+    /// ### umount_size_err
+    ///
+    /// Umount error size error
+    pub(super) fn umount_size_err(&mut self) {
+        self.view.umount(super::COMPONENT_TEXT_SIZE_ERR);
+    }
+
     /// ### mount_quit
     ///
     /// Mount quit popup