Commit Graph
2 Commits
Author SHA1 Message Date
Oleksandr KholiavkoandAnthony Eid ae472aac1d Rework column/table width API in data table (#51060)
data_table: Replace column width builder API with `ColumnWidthConfig`
enum

This PR consolidates the data table width configuration API from three
separate builder methods (`.column_widths()`, `.resizable_columns()`,
`.width()`) into a single `.width_config(ColumnWidthConfig)` call. This
makes invalid state combinations unrepresentable and clarifies the two
distinct width management modes.

**What changed:**

- Introduces `ColumnWidthConfig` enum with two variants:
  - `Static`: Fixed column widths, no resize handles
- `Redistributable`: Drag-to-resize columns that redistribute space
within a fixed table width
- Introduces `TableResizeBehavior` enum (`None`, `Resizable`,
`MinSize(f32)`) for per-column resize policy
- Renames `TableColumnWidths` → `RedistributableColumnsState` to better
reflect its purpose
- Extracts all width management logic into a new `width_management.rs`
module
- Updates all callers: `csv_preview`, `git_graph`, `keymap_editor`,
`edit_prediction_context_view`

```rust
pub enum ColumnWidthConfig {
    /// Static column widths (no resize handles).
    Static {
        widths: StaticColumnWidths,
        /// Controls widths of the whole table.
        table_width: Option<DefiniteLength>,
    },
    /// Redistributable columns — dragging redistributes the fixed available space
    /// among columns without changing the overall table width.
    Redistributable {
        entity: Entity<RedistributableColumnsState>,
        table_width: Option<DefiniteLength>,
    },
}
```

**Why:**

The old API allowed callers to combine methods incorrectly. The new
enum-based design enforces correct usage at compile time and provides a
clearer path for adding independently resizable columns in PR #3.

**Context:**

This is part 2 of a 3-PR series improving data table column width
handling:
1. [#51059](https://github.com/zed-industries/zed/pull/51059) - Extract
modules into separate files (mechanical change)
2. **This PR**: Introduce width config enum for redistributable column
widths (API rework)
3. Implement independently resizable column widths (new feature)

The series builds on previously merged infrastructure:
- [#46341](https://github.com/zed-industries/zed/pull/46341) - Data
table dynamic column support
- [#46190](https://github.com/zed-industries/zed/pull/46190) - Variable
row height mode for data tables

Primary beneficiary: CSV preview feature
([#48207](https://github.com/zed-industries/zed/pull/48207))


### Anthony's note

This PR also fixes the table dividers being a couple pixels off, and the
csv preview from having double line rendering for a single column in
some cases.

Before you mark this PR as ready for review, make sure that you have:
- [x] Added a solid test coverage and/or screenshots from doing manual
testing
- [x] Done a self-review taking into account security and performance
aspects
- [ ] Aligned any UI changes with the [UI
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)

Release Notes:

- N/A

---------

Co-authored-by: Anthony Eid <anthony@zed.dev>
2026-04-01 05:13:24 +00:00
Oleksandr KholiavkoandAnthony Eid d4634441e2 Add CSV preview with live table view and interactive features (#48207)
## **Description:**

**Context:**
This PR introduces an initial CSV preview feature for Zed, building upon
two previously merged infrastructure PRs:
- [#46341](https://github.com/zed-industries/zed/pull/46341) - Data
table dynamic column support (removed const generics)
- [#46190](https://github.com/zed-industries/zed/pull/46190) - Variable
row height mode for data tables

This implementation is based on the [original draft PR
#44344](https://github.com/zed-industries/zed/pull/44344), which has
been carefully decomposed into smaller, reviewable pieces.

---

#### **Features Included:**

**Core Infrastructure:**
- Live CSV parsing with smart debouncing (200ms cooldown)
- Performance monitoring with built-in timing metrics (not displayed in
UI yet)
- Automatic file change detection and re-parsing
- Support for quoted fields, multiline cells, and escaped characters

**Table Display:**
- Variable row height rendering with fallback to uniform mode
(switchable via settings)
- Draggable column resizing (reusing existing data table infrastructure)
- Row identifiers supporting both source line numbers and sequential row
numbers
- Configurable font rendering (UI font vs monospace)
- Tooltips showing full cell content on hover

**Interactive Features:**
- Column sorting (ascending/descending) with visual indicators

**Settings Panel:**
- Toggle between variable/uniform row rendering
- Font type selection (UI/monospace)
- Row identifier type configuration
- Debug information display
- Multiline cell rendering options

---

#### **Features Intentionally Removed for This PR:**

To reduce complexity and review scope, the following features were
temporarily reverted and will be reintroduced in subsequent PRs:

- ❌ Settings pannel with performance metrics overlay
- ❌ Cell selection (single, multiple, and range selections)
- ❌ Keyboard navigation with arrow keys and selection extension
- ❌ Copy functionality supporting CSV, TSV, and Markdown table formats
- ❌ Inline cell editing with file persistence
- ❌ Viewport following for large datasets
- ❌ Column filtering and search capabilities

These removals were done via "time-machine" commits that cleanly nuked
vertical slices of functionality from the complete implementation.

---

**Technical Implementation:**

The feature is organized into a dedicated `csv_preview` crate with the
following structure:

```
crates/csv_preview/
├── src/
│   ├── csv_preview.rs          # Main view and coordination logic
│   ├── parser.rs               # CSV parsing and editor integration
│   ├── settings.rs             # Configuration types and defaults
│   ├── table_data_engine.rs    # Data transformation logic
│   ├── renderer/               # UI rendering modules
│   │   ├── preview_view.rs     # Main render implementation
│   │   ├── render_table.rs     # Table component assembly
│   │   ├── table_cell.rs       # Individual cell rendering
│   │   ├── table_header.rs     # Header with sorting controls
│   │   └── row_identifiers.rs  # Line number column
│   └── types/                  # Core data structures
│       ├── table_like_content.rs
│       ├── coordinates.rs      # Display vs data coordinate systems
│       └── table_cell.rs
```

**Key architectural decisions:**
- **Dual coordinate system**: Separates data indices from display
indices to support sorting/filtering
- **Component reuse**: Leverages existing `data_table` infrastructure
from the keymap editor

---

**Integration:**
- Registers `csv::OpenPreview` action (currently without default
keybindings)
- Follows the same workspace integration pattern as `markdown_preview`
and `svg_preview`
- Automatically detects `.csv` file extensions
- Tab integration with appropriate icons and naming

---

**Code Structure Note:**
Some code structures, types, and documentation may appear redundant or
over-engineered in this initial implementation. This is intentional -
the feature was developed as a complete system and then decomposed by
functionality rather than being built incrementally. The "extra"
infrastructure supports features that were removed for this PR but will
be reintroduced in subsequent ones.

This approach was chosen over extensive refactoring because:
1. The complete feature took 200+ commits to develop with significant
rewrites
2. Clean extraction of vertical slices was more feasible than rebuilding
incrementally
3. The end state will utilize all these components, making current
"redundancy" temporary

I apologize for any inconvenience this may cause during review, but the
alternative would have required significant refactoring effort just to
make intermediate states "prettier," which seemed counterproductive.

---

**Future Work:**
This lays the groundwork for upcoming PRs that will reintroduce the
removed features:
- Cell selection and keyboard navigation
- Copy functionality with multiple output formats
- Inline editing capabilities with undo/redo
- Column filtering and search
- TSV and other delimiter support
- Improved horizontal scrolling behavior
- Settings persistence

**Testing:**
Includes test fixtures demonstrating multiline cell handling, various
column counts, and edge cases.

---

**Release Notes:**

- N/A This is feature flagged

---------

Co-authored-by: Anthony Eid <anthony@zed.dev>
2026-03-03 15:49:40 +01:00