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Rehearsal: UI: Formulas › Function Library as labelled buttons with category menus; Recently Used and Insert Function categories - #34
Reviewing files that changed from the base of the PR and between 3007f43 and 7281e09.
Files selected for processing: 11
ROADMAP.md
crates/engine/src/cmd/edit.rs
crates/engine/src/cmd/extra.rs
crates/engine/src/recent.rs
crates/engine/tests/it/recently_used.rs
crates/ui-egui/src/dialogs.rs
crates/ui-egui/src/function_library.rs
crates/ui-egui/src/lib.rs
crates/ui-egui/src/ribbon.rs
crates/ui-egui/tests/it/function_library.rs
docs/target-app-parity.md
Files skipped from review as they are similar to previous changes: 2
docs/target-app-parity.md
ROADMAP.md
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Walkthrough
The engine records recognized functions from successful journaled cell and range commands in preferences. The UI adds a categorized Function Library, recent-function menus, and an updated Insert Function dialog.
Changes: Recently Used Functions and Function Library
Successful journaled cell and range commands update a preference-backed list of up to ten recognized functions. The list is newest first, persists with preferences, and is returned by formulas.recentlyUsed.
Function catalog and Insert Function dialog crates/ui-egui/src/function_library.rs, crates/ui-egui/src/dialogs.rs
The UI adds categorized function menus, Recently Used and AutoSum menus, and category-aware Insert Function search. The dialog opens on Most Recently Used by default and supports localized names and descriptions.
The Formulas tab displays category buttons with distinct glyphs, colors, and keytips. AutoSum menus are shared with the Home tab. Tests cover ribbon and dialog behavior, keytips, accessibility metadata, and recent-function ordering. Translation labels and category names were updated.
sequenceDiagram
actor User
participant Session
participant Prefs
participant FunctionLibrary
User->>Session: enter formula with a cell or range command
Session->>Prefs: record recognized functions
FunctionLibrary->>Session: call formulas.recentlyUsed
Session-->>FunctionLibrary: return recent function names
FunctionLibrary-->>User: display Recently Used menu
No actionable merge-blocking issue remains in the reviewed changes after normal checks.
Security architecture risk: Low · up to 7281e
The change makes function-use metadata durable across workbooks. Exposure is limited by storing a short list of recognized function names rather than formula contents. The inspected insertion paths continue to use the existing formula editor.
Retained concerns
No architecture-level concerns identified.
Security review details
Security Blast Radius
inferred — The newly durable metadata spans workbooks within the application preference context. In the inspected desktop and web paths, its storage boundary is the local configuration directory or browser-origin storage, rather than an individual workbook.
Trust Boundaries and Controls
observed — Command input crosses into persistent recent history through catalog validation. Preference restoration also filters names, and UI consumers resolve recent entries against the catalog before offering insertion. These paths do not use persisted strings as arbitrary executable commands.
Resilience and Maintainability Implications
observed — Recent extraction limits formula length to 8,192 bytes, array traversal depth to two levels, and formula scanning to a 2,000-formula budget. Persisted list size is capped at ten, limiting this new metadata path independently of journal growth.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
Check name
Status
Explanation
Resolution
Docstring Coverage
Docstring coverage is 57.66% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 111 functions across 36 files. (2 skipped…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
Check name
Status
Explanation
Description Check
Check skipped - CodeRabbit’s high-level summary is enabled.
Title check
The title clearly identifies the main changes: labelled Function Library buttons with category menus, Recently Used support, and Insert Function categories. It is specific and related to the changeset…
Linked Issues check
Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check
Check skipped because no linked issues were found for this pull request.
Full details: Title check
Explanation
The title clearly identifies the main changes: labelled Function Library buttons with category menus, Recently Used support, and Insert Function categories. It is specific and related to the changeset, although relatively long.
Full details: Docstring Coverage
Explanation
Docstring coverage is 57.66% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 111 functions across 36 files. (2 skipped: 2 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
Finishing Touches: 💡 1
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Actionable comments posted: 2
🪄 Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix review comments
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Inline comments:
Review comments at @crates/engine/src/recent.rs:
- Around line 36-52: Update `functions_in_formula` and the other recent-formula
filter to share one predicate that recognizes exactly the formula syntax
accepted by `input_to_cell`, including valid non-numeric `+` and `-` inputs
while excluding numeric values. Use that predicate both to select recent formula
entries and to extract their functions; preserve existing handling of `=`
formulas and function ordering.
Review comments at @crates/ui-egui/tests/it/function_library.rs:
- Line 18: Update formulas_tab to initialize its SheetApp with
crate::common::app(session) and construct its harness with
crate::common::builder(), preserving the existing OS, size, and UI state setup.
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The Function Library group was a big Insert Function button followed by
AutoSum and seven big category buttons that all drew the same icon, the
widest group on the Formulas tab. It is now laid out as Excel lays it
out when the window is not wide enough for a big button per category:
big Insert Function and AutoSum buttons, then the categories as
labelled small buttons in columns of three:
Recently Used Text Math & Trig
Financial Date & Time More Functions
Logical Lookup & Reference
- The category buttons draw a new code-drawn icon, Icon::FnBook, a book
whose spine and glyph (star, coins, question mark, letter, clock,
magnifier, theta, dots) take the category's colour from the theme's
category palette. icons::paint_accent draws an icon with an accent
colour, and widgets::small_button_accent is a small button that uses
it; small_button is unchanged for its callers.
- AutoSum stays the big split button: the icon inserts SUM, the label
and arrow open the AutoSum menu, which now reads Sum, Average, Count
Numbers, Max, Min and More Functions… and is shared with Home ›
Editing. Its tooltip names the control only, so the shortcut comes
from the platform lookup (Alt+= on Windows and Linux).
- Each category menu lists its functions with their descriptions on
hover and ends with Insert Function…, which opens the dialog with
that category. More Functions cascades into Statistical, Engineering,
Cube, Information, Compatibility and Web. Recently Used lists what
the engine's formulas.recentlyUsed returns.
- The function categories, the function list (built once) and the menus
live in a new function_library module; the dialog's category labels
come from it.
- keytips.json gains MR for Recently Used, Excel's sequence. Labelled
small and big buttons report their label to accessibility.
- The one-line labels (Date & Time, Lookup & Reference, Math & Trig,
More Functions) replace the two-line keys in every interface
language, with the same words. Recently Used is translated in Czech,
German, Spanish, French, Japanese, Korean, Portuguese, Russian and
Chinese; the other languages show it in English, their fallback.
Tests: tests/it/function_library.rs covers the layout (columns of three
level with the tab's other columns), each category menu and its Insert
Function… row, the More Functions cascade, the AutoSum split button and
its menu, and the MR key tip. A ribbon unit test keeps Command-key
glyphs out of the ribbon's text. chart_resize picks the chart menu's
Delete now that Home › Cells' Delete has an accessible name.
…ategory list
formulas.recentlyUsed scanned the session journal for cell.set inputs.
It missed formulas entered by range.* commands, lost them when the
journal dropped its oldest entries (a large file open or a long script
is enough), and started empty in every session. The Function Library's
Recently Used menu and the Insert Function dialog list what it returns.
- Prefs::recent_functions (a new engine module, recent.rs) holds the
ten functions most recently entered in a formula, newest first.
Session::execute updates it for every cell.* and range.* command it
journals, from any source (the interface, the control channel, MCP or
a script). It reads at most 2,000 of the formulas a command enters,
starting from the last one; formulas longer than Excel's limit are
skipped. formulas.recentlyUsed
returns it. It never reads the journal back, so the journal's caps do
not affect it.
- The list is kept with the other engine preferences (prefs.json, the
browser's storage on the web), so it survives a restart as Excel's
does. It is read leniently: a malformed value loses only this list. A
fresh install starts from common functions.
The Insert Function dialog is titled "Insert Function", as in Excel (it
said "Formula Builder"), and gains a working category list: Most
Recently Used, All, then each category in Excel's order. A category may
be given by label or by engine id, so a Function Library menu or the
control channel (ui.dialog.set) opens it on one, and a new search
switches to All. The dialog keeps its translated labels and its search
in the interface language. Each row shows the function's name and its
category in two columns; the category column starts after the widest
name shown, so a long name in any font or formula language stays clear
of it. A function counts as recently used once its formula is entered,
not when OK is pressed. The unused "Formula Builder" translations are
removed.
Tests: engine unit tests for reading functions from formulas (strings,
unknown names, over-long and malformed formulas), the formulas a
command enters (newest first, within the budget), the ten-name list
and the lenient read of prefs.json; tests/it/recently_used.rs for
cell.set and range.setValues from the session, a failed command, a
cleared journal and a save and reload of the preferences. UI tests for
the menu's order and the dialog's title, categories, engine-id
category, search and OK, and for the category column with a wide font.
The search box asked for the keyboard focus every frame, so Tab moved to the
category list for one frame and the focus went back to the search box. The
dialog now gives the search box the focus once, when it opens, through the
module's take_first_focus, as the other dialogs do.
Test: insert_function_lets_tab_reach_the_category_list (the search box has
the focus and takes typing; after Tab the category list keeps it over several
frames; Space opens the list).
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Rehearsal of upstream pull request 467 after a rebase onto the current main (egui 0.37). Not for merging.
Summary by CodeRabbit
+or-are recognized more reliably without treating negative numbers as formulas.