feat(ui): pane frames (new pane UI) (#643)

* work

* resize working

* move focus working

* close pane working

* selection and fullscreen working

* pane title line

* titles and conditional scroll title

* whole tab resize working

* plugin frames working

* plugin splitting working

* truncate pane frame titles

* cleanup

* panes always draw their own borders - also fix gap

* toggle pane frames

* move toggle to screen and fix some bugs

* fix plugin frame toggle

* fix terminal window resize

* fix scrolling and fullscreen bugs

* unit tests passing

* e2e tests passing and new test for new frames added

* refactor: TerminalPane and PluginPane

* refactor: Tab

* refactor: moar Tab

* refactor: Boundaries

* only render and calculate boundaries when there are no pane frames

* refactor: Layout

* fix(grid): properly resize when coming back from alternative viewport

* style: remove commented code

* style: fmt

* style: fmt

* style: fmt + clippy

* docs(changelog): update change

3 files changed, 11 insertions, 7 deletions

diff --git a/default-plugins/status-bar/src/main.rs b/default-plugins/status-bar/src/main.rs
index 83eb50c9a..dba373f6b 100644
--- a/default-plugins/status-bar/src/main.rs
+++ b/default-plugins/status-bar/src/main.rs
@@ -154,7 +154,11 @@ impl ZellijPlugin for State {
 
         let colored_elements = color_elements(self.mode_info.palette);
         let superkey = superkey(colored_elements, separator);
-        let ctrl_keys = ctrl_keys(&self.mode_info, cols - superkey.len, separator);
+        let ctrl_keys = ctrl_keys(
+            &self.mode_info,
+            cols.saturating_sub(superkey.len),
+            separator,
+        );
 
         let first_line = format!("{}{}", superkey, ctrl_keys);
         let second_line = keybinds(&self.mode_info, cols);
diff --git a/default-plugins/strider/src/state.rs b/default-plugins/strider/src/state.rs
index 0d96ae0b9..0ae84ab29 100644
--- a/default-plugins/strider/src/state.rs
+++ b/default-plugins/strider/src/state.rs
@@ -47,10 +47,10 @@ impl FsEntry {
             FsEntry::Dir(_, s) => s.to_string(),
             FsEntry::File(_, s) => pb::convert(*s as f64),
         };
-        let space = width - info.len();
+        let space = width.saturating_sub(info.len());
         let name = self.name();
-        if space - 1 < name.len() {
-            [&name[..space - 2], &info].join("~ ")
+        if space.saturating_sub(1) < name.len() {
+            [&name[..space.saturating_sub(2)], &info].join("~ ")
         } else {
             let padding = " ".repeat(space - name.len());
             [name, padding, info].concat()
diff --git a/default-plugins/tab-bar/src/line.rs b/default-plugins/tab-bar/src/line.rs
index 3ebeaac31..fc18abfd1 100644
--- a/default-plugins/tab-bar/src/line.rs
+++ b/default-plugins/tab-bar/src/line.rs
@@ -191,7 +191,7 @@ pub fn tab_line(
         &mut tabs_before_active,
         &mut tabs_after_active,
         &mut tabs_to_render,
-        cols - prefix.len,
+        cols.saturating_sub(prefix.len),
     );
 
     let mut tab_line: Vec<LinePart> = vec![];
@@ -200,7 +200,7 @@ pub fn tab_line(
             &mut tabs_before_active,
             &mut tabs_to_render,
             &mut tab_line,
-            cols - prefix.len,
+            cols.saturating_sub(prefix.len),
             palette,
             tab_separator(capabilities),
         );
@@ -210,7 +210,7 @@ pub fn tab_line(
         add_next_tabs_msg(
             &mut tabs_after_active,
             &mut tab_line,
-            cols - prefix.len,
+            cols.saturating_sub(prefix.len),
             palette,
             tab_separator(capabilities),
         );