Struct ProjectDiffDeletionRows 

pub struct ProjectDiffDeletionRows { /* private fields */ }

The view-touching half. Spawn a source document per file, add it to view’s source map, and append one excerpt per hunk.

Returns the number of excerpts appended, so the caller can keep a running hunk count for the headerline without re-reading the view.

Appending (rather than replacing) is what makes the view fill progressively: the user sees the first files while the rest are still being read. PD.7b: the removed lines, as virtual rows.

A removed line has no row in the working-tree file — that is what removed means — so it cannot be painted like a changed one. It renders as a DeletionBlock virtual row anchored above the post-image line the deletion sat at.

Composed anchors are computed here, per collect(), from the view’s current excerpt list — never cached. That is what makes the rows slide when the user types: an edit shifts the excerpts, the next collect reads the shifted excerpts, and the ghosts move with them. A stored composed anchor would detach on the first keystroke, which is the drift PD.7 flagged.

Known ceiling, chosen deliberately: these rows are display-only, so removed text cannot be searched, selected or copied. Zed shipped this same shape first and later spent a large refactor making deleted hunks ordinary text in the editor’s coordinate space precisely to get those three back. We take the simpler form because it preserves the one-composed-row-one-source-line invariant the whole edit-propagation path rests on — the invariant whose violation caused the line-number off-by-one. If searchable deletions are wanted later, that is the change, and it is a substrate change rather than a provider one.

Implementations

impl ProjectDiffDeletionRows

pub fn new(view: MultibufferDocumentHandle, buffer_id: BufferId) -> Self

pub fn set_for_source(&self, source: BufferId, removed: Vec<(u32, Vec<String>)>)

Record a batch’s removals and invalidate, so the next frame re-collects rather than serving a cached row set.

Trait Implementations

impl Debug for ProjectDiffDeletionRows

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl VirtualRowProvider for ProjectDiffDeletionRows

fn id(&self) -> ProviderId

A stable id for this provider. Used by the worker to deduplicate registration + route mutation notifications.

fn version(&self) -> u64

Monotonic version counter — the provider bumps it whenever the rows [Self::collect] would emit have changed. The worker uses the combined fingerprint of all providers’ versions to short-circuit on the cache-hit path without paying for the (potentially expensive) collect calls.

fn collect(&self) -> Vec<VirtualRow>

Emit the current set of virtual rows for the associated document.