logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/edit_prediction_context/src/assemble_excerpts.rs

@@ -0,0 +1,158 @@
+use language::{BufferSnapshot, OffsetRangeExt as _, Point};
+use std::ops::Range;
+
+#[cfg(not(test))]
+const MAX_OUTLINE_ITEM_BODY_SIZE: usize = 512;
+#[cfg(test)]
+const MAX_OUTLINE_ITEM_BODY_SIZE: usize = 24;
+
+pub fn assemble_excerpt_ranges(
+    buffer: &BufferSnapshot,
+    input_ranges: Vec<(Range<Point>, usize)>,
+) -> Vec<(Range<u32>, usize)> {
+    let mut input_ranges: Vec<(Range<Point>, usize)> = input_ranges
+        .into_iter()
+        .map(|(range, order)| (clip_range_to_lines(&range, false, buffer), order))
+        .collect();
+    merge_ranges(&mut input_ranges);
+
+    let mut outline_ranges: Vec<(Range<Point>, usize)> = Vec::new();
+    let outline_items = buffer.outline_items_as_points_containing(0..buffer.len(), false, None);
+    let mut outline_ix = 0;
+    for (input_range, input_order) in &mut input_ranges {
+        while let Some(outline_item) = outline_items.get(outline_ix) {
+            let item_range = clip_range_to_lines(&outline_item.range, false, buffer);
+
+            if item_range.start > input_range.start {
+                break;
+            }
+
+            if item_range.end > input_range.start {
+                let body_range = outline_item
+                    .body_range(buffer)
+                    .map(|body| clip_range_to_lines(&body, true, buffer))
+                    .filter(|body_range| {
+                        body_range.to_offset(buffer).len() > MAX_OUTLINE_ITEM_BODY_SIZE
+                    });
+
+                add_outline_item(
+                    item_range.clone(),
+                    body_range.clone(),
+                    *input_order,
+                    buffer,
+                    &mut outline_ranges,
+                );
+
+                if let Some(body_range) = body_range
+                    && input_range.start < body_range.start
+                {
+                    let mut child_outline_ix = outline_ix + 1;
+                    while let Some(next_outline_item) = outline_items.get(child_outline_ix) {
+                        if next_outline_item.range.end > body_range.end {
+                            break;
+                        }
+                        if next_outline_item.depth == outline_item.depth + 1 {
+                            let next_item_range =
+                                clip_range_to_lines(&next_outline_item.range, false, buffer);
+
+                            add_outline_item(
+                                next_item_range,
+                                next_outline_item
+                                    .body_range(buffer)
+                                    .map(|body| clip_range_to_lines(&body, true, buffer)),
+                                *input_order,
+                                buffer,
+                                &mut outline_ranges,
+                            );
+                        }
+                        child_outline_ix += 1;
+                    }
+                }
+            }
+
+            outline_ix += 1;
+        }
+    }
+
+    input_ranges.extend(outline_ranges);
+    merge_ranges(&mut input_ranges);
+
+    input_ranges
+        .into_iter()
+        .map(|(range, order)| (range.start.row..range.end.row, order))
+        .collect()
+}
+
+fn clip_range_to_lines(
+    range: &Range<Point>,
+    inward: bool,
+    buffer: &BufferSnapshot,
+) -> Range<Point> {
+    let mut range = range.clone();
+    if inward {
+        if range.start.column > 0 {
+            range.start.column = buffer.line_len(range.start.row);
+        }
+        range.end.column = 0;
+    } else {
+        range.start.column = 0;
+        if range.end.column > 0 {
+            range.end.column = buffer.line_len(range.end.row);
+        }
+    }
+    range
+}
+
+fn add_outline_item(
+    mut item_range: Range<Point>,
+    body_range: Option<Range<Point>>,
+    order: usize,
+    buffer: &BufferSnapshot,
+    outline_ranges: &mut Vec<(Range<Point>, usize)>,
+) {
+    if let Some(mut body_range) = body_range {
+        if body_range.start.column > 0 {
+            body_range.start.column = buffer.line_len(body_range.start.row);
+        }
+        body_range.end.column = 0;
+
+        let head_range = item_range.start..body_range.start;
+        if head_range.start < head_range.end {
+            outline_ranges.push((head_range, order));
+        }
+
+        let tail_range = body_range.end..item_range.end;
+        if tail_range.start < tail_range.end {
+            outline_ranges.push((tail_range, order));
+        }
+    } else {
+        item_range.start.column = 0;
+        item_range.end.column = buffer.line_len(item_range.end.row);
+        outline_ranges.push((item_range, order));
+    }
+}
+
+pub fn merge_ranges(ranges: &mut Vec<(Range<Point>, usize)>) {
+    ranges.sort_unstable_by(|(a, _), (b, _)| a.start.cmp(&b.start).then(b.end.cmp(&a.end)));
+
+    let mut index = 1;
+    while index < ranges.len() {
+        let mut prev_range_end = ranges[index - 1].0.end;
+        if prev_range_end.column > 0 {
+            prev_range_end += Point::new(1, 0);
+        }
+
+        if (prev_range_end + Point::new(1, 0))
+            .cmp(&ranges[index].0.start)
+            .is_ge()
+        {
+            let removed = ranges.remove(index);
+            if removed.0.end.cmp(&ranges[index - 1].0.end).is_gt() {
+                ranges[index - 1].0.end = removed.0.end;
+            }
+            ranges[index - 1].1 = ranges[index - 1].1.min(removed.1);
+        } else {
+            index += 1;
+        }
+    }
+}