SSH remote ui (#15129)

Still TODO:
* [x] hide this UI unless you have some ssh projects in settings
* [x] add the "open folder" flow with the new open picker
* [ ] integrate with recent projects / workspace restoration

Release Notes:

- N/A

crates/editor/src/display_map.rs

@@ -109,6 +109,7 @@ pub struct DisplayMap {
     crease_map: CreaseMap,
     fold_placeholder: FoldPlaceholder,
     pub clip_at_line_ends: bool,
+    pub(crate) masked: bool,
 }
 
 impl DisplayMap {
@@ -156,6 +157,7 @@ impl DisplayMap {
             text_highlights: Default::default(),
             inlay_highlights: Default::default(),
             clip_at_line_ends: false,
+            masked: false,
         }
     }
 
@@ -182,6 +184,7 @@ impl DisplayMap {
             text_highlights: self.text_highlights.clone(),
             inlay_highlights: self.inlay_highlights.clone(),
             clip_at_line_ends: self.clip_at_line_ends,
+            masked: self.masked,
             fold_placeholder: self.fold_placeholder.clone(),
         }
     }
@@ -499,6 +502,7 @@ pub struct DisplaySnapshot {
     text_highlights: TextHighlights,
     inlay_highlights: InlayHighlights,
     clip_at_line_ends: bool,
+    masked: bool,
     pub(crate) fold_placeholder: FoldPlaceholder,
 }
 
@@ -650,6 +654,7 @@ impl DisplaySnapshot {
             .chunks(
                 display_row.0..self.max_point().row().next_row().0,
                 false,
+                self.masked,
                 Highlights::default(),
             )
             .map(|h| h.text)
@@ -657,9 +662,9 @@ impl DisplaySnapshot {
 
     /// Returns text chunks starting at the end of the given display row in reverse until the start of the file
     pub fn reverse_text_chunks(&self, display_row: DisplayRow) -> impl Iterator<Item = &str> {
-        (0..=display_row.0).rev().flat_map(|row| {
+        (0..=display_row.0).rev().flat_map(move |row| {
             self.block_snapshot
-                .chunks(row..row + 1, false, Highlights::default())
+                .chunks(row..row + 1, false, self.masked, Highlights::default())
                 .map(|h| h.text)
                 .collect::<Vec<_>>()
                 .into_iter()
@@ -676,6 +681,7 @@ impl DisplaySnapshot {
         self.block_snapshot.chunks(
             display_rows.start.0..display_rows.end.0,
             language_aware,
+            self.masked,
             Highlights {
                 text_highlights: Some(&self.text_highlights),
                 inlay_highlights: Some(&self.inlay_highlights),

crates/editor/src/display_map/block_map.rs

@@ -23,6 +23,7 @@ use text::Edit;
 use ui::ElementId;
 
 const NEWLINES: &[u8] = &[b'\n'; u8::MAX as usize];
+const BULLETS: &str = "********************************************************************************************************************************";
 
 /// Tracks custom blocks such as diagnostics that should be displayed within buffer.
 ///
@@ -285,6 +286,7 @@ pub struct BlockChunks<'a> {
     input_chunk: Chunk<'a>,
     output_row: u32,
     max_output_row: u32,
+    masked: bool,
 }
 
 #[derive(Clone)]
@@ -893,6 +895,7 @@ impl BlockSnapshot {
         self.chunks(
             0..self.transforms.summary().output_rows,
             false,
+            false,
             Highlights::default(),
         )
         .map(|chunk| chunk.text)
@@ -903,6 +906,7 @@ impl BlockSnapshot {
         &'a self,
         rows: Range<u32>,
         language_aware: bool,
+        masked: bool,
         highlights: Highlights<'a>,
     ) -> BlockChunks<'a> {
         let max_output_row = cmp::min(rows.end, self.transforms.summary().output_rows);
@@ -941,6 +945,7 @@ impl BlockSnapshot {
             transforms: cursor,
             output_row: rows.start,
             max_output_row,
+            masked,
         }
     }
 
@@ -1229,12 +1234,20 @@ impl<'a> Iterator for BlockChunks<'a> {
         let (prefix_rows, prefix_bytes) =
             offset_for_row(self.input_chunk.text, transform_end - self.output_row);
         self.output_row += prefix_rows;
-        let (prefix, suffix) = self.input_chunk.text.split_at(prefix_bytes);
+        let (mut prefix, suffix) = self.input_chunk.text.split_at(prefix_bytes);
         self.input_chunk.text = suffix;
         if self.output_row == transform_end {
             self.transforms.next(&());
         }
 
+        if self.masked {
+            // Not great for multibyte text because to keep cursor math correct we
+            // need to have the same number of bytes in the input as output.
+            let chars = prefix.chars().count();
+            let bullet_len = chars;
+            prefix = &BULLETS[..bullet_len];
+        }
+
         Some(Chunk {
             text: prefix,
             ..self.input_chunk.clone()
@@ -2048,6 +2061,7 @@ mod tests {
                     .chunks(
                         start_row as u32..blocks_snapshot.max_point().row + 1,
                         false,
+                        false,
                         Highlights::default(),
                     )
                     .map(|chunk| chunk.text)

crates/editor/src/editor.rs

@@ -480,7 +480,6 @@ pub struct Editor {
     mode: EditorMode,
     show_breadcrumbs: bool,
     show_gutter: bool,
-    redact_all: bool,
     show_line_numbers: Option<bool>,
     show_git_diff_gutter: Option<bool>,
     show_code_actions: Option<bool>,
@@ -1803,7 +1802,6 @@ impl Editor {
             show_code_actions: None,
             show_runnables: None,
             show_wrap_guides: None,
-            redact_all: false,
             show_indent_guides,
             placeholder_text: None,
             highlight_order: 0,
@@ -10420,9 +10418,11 @@ impl Editor {
         cx.notify();
     }
 
-    pub fn set_redact_all(&mut self, redact_all: bool, cx: &mut ViewContext<Self>) {
-        self.redact_all = redact_all;
-        cx.notify();
+    pub fn set_masked(&mut self, masked: bool, cx: &mut ViewContext<Self>) {
+        if self.display_map.read(cx).masked != masked {
+            self.display_map.update(cx, |map, _| map.masked = masked);
+        }
+        cx.notify()
     }
 
     pub fn set_show_wrap_guides(&mut self, show_wrap_guides: bool, cx: &mut ViewContext<Self>) {
@@ -11108,10 +11108,6 @@ impl Editor {
         display_snapshot: &DisplaySnapshot,
         cx: &WindowContext,
     ) -> Vec<Range<DisplayPoint>> {
-        if self.redact_all {
-            return vec![DisplayPoint::zero()..display_snapshot.max_point()];
-        }
-
         display_snapshot
             .buffer_snapshot
             .redacted_ranges(search_range, |file| {