166 lines
8.8 KiB
Markdown
166 lines
8.8 KiB
Markdown
# Plan — kate-custom
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## Goal
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Build a suite of Kate plugins that make the editor usable without menus, tuned
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to one specific operator profile:
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- mouse-heavy, with the mouse used at the caret rather than at the menubar
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- one-handed keyboard typing
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- no complex chords; single modifier at most
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- compact keyboard where F-keys/nav clusters sit behind a layer toggle
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- long Emacs history and some Sublime Text; `M-x` and type-to-filter palettes
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are familiar and welcome
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The spine of the suite is a single **action registry** reached through three
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interchangeable doors: `M-x` (keyboard), a radial caret menu (mouse), and the
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`:` command line (optional). Every feature registers its commands once and
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becomes reachable from all three. No action depends on an F-key or a chord.
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### Guiding principle: natural actions drive editing
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Each door suits a different kind of action, and placing an action in the wrong
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door breaks flow:
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- **Radial** is for actions that **complete in place** — cut, copy, paste,
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comment, case changes, join lines. The gesture starts and ends at the cursor;
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attention never leaves the text.
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- Actions that **open a panel demanding immediate focus elsewhere** (Find,
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Replace, goto) do **not** belong in the radial. Being flung to a panel right
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after a cursor gesture is jarring. These belong in the **command palette** or
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a **keybind**, where the context switch is expected. The radial keeps a
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"Command Palette…" slice as the escape hatch to them.
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## Why a custom matcher is the keystone
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Kate's built-in command bar cannot be fixed in place:
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- `KCommandBar` (KConfigWidgets) exposes only `setActions()`. There is no hook
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to replace or configure its matcher.
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- `KFuzzyMatcher` (KCoreAddons) is single-needle, strictly in-order
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subsequence, and not typo tolerant. KDE's own docs state `"gti"` will not
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match `"git"`. No orderless, no company-style completion.
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Therefore the palette is replaced, not extended, and the replacement is built on
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`FuzzyRanker`, a matcher with:
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- **orderless** tokenization (space-separated needles matched in any order)
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- **layered scoring**, strongest tier first:
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1. exact
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2. substring
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3. word-boundary initials (`rs` -> **R**ename **S**ymbol)
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4. in-order subsequence
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5. bounded typo via a single adjacent transposition (`gti` -> `git`;
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deliberately narrow to avoid false positives like `ren` -> "Open File")
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- **merged highlight ranges** for the UI
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- AND semantics across needles, case-folded, shorter-candidate preference
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## Milestones
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### M1 — FuzzyRanker (keystone) — DONE
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- Repo scaffold: top-level CMake (KF6/Qt6/ECM), `src/`, `src/fuzzy/`.
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- `src/fuzzy/fuzzyranker.{h,cpp}`: tokenize + layered scoring + ranges.
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- `src/fuzzy/test_fuzzyranker.cpp`: QTest suite, 14 cases, all green,
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including `gti -> git` and `ren sym -> Rename Symbol`.
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### M2 — Palette widget (replaces KCommandBar) — DONE
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- `PaletteModel` (`src/palette/palettemodel.{h,cpp}`): `QAbstractListModel`,
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re-ranks via `FuzzyRanker` on `setQuery`, exposes id/label/group/score and
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highlight ranges per row, frecency bonus. No widget dependency.
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- `PaletteWidget` (`src/palette/palettewidget.{h,cpp}`): frameless popup, filter
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line + results list, live company-style updates, top hit preselected, custom
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delegate bolds matched ranges. Keyboard: Up/Down/PageUp/PageDown, Enter
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activates, Esc cancels — cursor stays in the filter line, no chords. Mouse:
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click a row to activate. Emits `activatedId(id)` / `cancelled()`.
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- `src/palette/test_palettemodel.cpp`: 10 QTest cases, all green (filtering,
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orderless, typo, best-first ordering, frecency tie-break, highlight ranges).
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### M3 — KTextEditor plugin + M-x + action registry — DONE
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- `src/plugin/ollieplugin.{h,cpp}` + `ollieplugin.json`: a loadable
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`KTextEditor::Plugin` (`olliepalette.so`) built with `kcoreaddons_add_plugin`.
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- `OllieView` (one per MainWindow) registers the **M-x** action, `Alt+X`, a
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single modifier with the keys adjacent on a compact layout; `ApplicationShortcut`
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context so it is always live.
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- On trigger it aggregates every enabled, visible `QAction` from the window's
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`guiFactory()->clients()` action collections, keyed by stable `objectName`,
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and feeds them to `PaletteWidget`. The action's current shortcut is shown in
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the group column. Accepting a row triggers the underlying `QAction`.
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- Installs to `kf6/ktexteditor`; metadata verified valid via `KPluginMetaData`.
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- Not yet wired: frecency (the model supports a bonus, but the plugin currently
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passes 0 for every action — usage tracking is deferred).
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- Duplicate handling: actions are deduplicated only by pointer identity (the
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exact same action object reachable through several GUI clients is listed
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once — functionally lossless). Distinct actions are never dropped. When two
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distinct actions would render with the same label, the label is enriched
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through a fallback chain until every visible row is unique: component name →
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objectName → shortcut → numeric suffix. Each entry also gets a unique id so
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activation always triggers the intended action.
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### M4 — Radial caret menu (mouse door) — DONE (first increment)
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- `src/radial/radialmodel.{h,cpp}`: pure tree + geometry. Multi-level
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(branch/leaf) `RadialNode` tree, angle hit-testing (0 = up, clockwise), inner
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dead zone, far-flick snaps by angle, descend/ascend navigation. 14 tests.
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- `src/radial/radialmenu.{h,cpp}`: frameless translucent `QWidget`; paints the
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current ring (wedges, labels, branch ▸, central "back" hub), highlights the
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slice under the pointer. Two interaction modes from one widget: a **drag
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gesture** (opened with a button held — drag out and release to select; a
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release that never left the dead zone switches to click mode and keeps the
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menu open) and a **discrete click mode** (click a slice to select, click
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outside the ring to cancel). Esc ascends/cancels. Opens centred on the given
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point without moving the caret.
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- `src/radial/radialconfig.{h,cpp}`: JSON → radial tree parser (+ built-in
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default) so multiple radials can be bound to different triggers. 8 tests.
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- Wired into the plugin: `OllieView::setupRadials()` registers a key trigger
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(default **Alt+R**) and a **mouse-button gesture** (default **right mouse
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button**) per configured radial. Because the opening RMB press leaves an
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implicit grab on the editor view, the whole gesture (hover + release) is
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driven from the plugin's application event filter in global coordinates
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(`driveHoverGlobal`/`driveReleaseGlobal`), not from a popup mouse grab — this
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fixes stale hover and wrong-slice selection. The press and the following
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`ContextMenu` are consumed, so the context menu is suppressed and the caret
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does not move. Key-triggered radials pop at the caret
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(`View::cursorPositionCoordinates()`) and use the widget's own click handling.
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- A slice may reference any Kate action by objectName, resolved via
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`findActionByName`; the special `ollie_command_palette` slice opens the palette.
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- Honours the agreed model: radials are triggerable by keys (weapon-wheel style)
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and by mouse buttons/gestures; the config carries both a key `trigger` and a
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mouse `button` per radial.
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- Not yet done: free-form stroke gestures (only button-press gesture so far);
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user-file config loading (built-in default only); frecency.
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### Mouse chording (Acme-style) — DONE (first increment)
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- Left+middle chord = **Cut**: with the left button held while selecting
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(button 1 anchor), a tap of the middle button (button 2) cuts the current
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selection. Driven by the same application event filter — it tracks the left
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button held inside the view and, on a middle press while held, triggers
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`edit_cut` and consumes the event. Middle-click alone (no left held) still
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does the usual primary-selection paste.
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- Right-button chords are intentionally **not** ported — the right button is the
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radial gesture. (Revisit later.)
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- The radial gesture is suppressed while the left button is held, so an RMB tap
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mid-selection (or during a left+middle chord) does not pop the radial.
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### M5 — Command vocabulary + project model + switchers — NEXT
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- `:`-verb pack via `KTextEditor::Command`: `sort`, `align`, `json`, `b64`,
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`uuid`, `case`, `pipe <shell>`, etc. These populate M-x and the radial.
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- **Project = directory.** "Open folder == open project" (VSCode/Sublime model);
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no `.kateproject` ceremony.
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- File / symbol switchers scoped to the opened folder (e.g. `git ls-files` / `fd`
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for files; LSP or ctags for symbols), all through the M2 palette.
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## Build and test
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```sh
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cmake -B build -S .
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cmake --build build
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ctest --test-dir build
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# or directly:
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QT_QPA_PLATFORM=offscreen ./build/bin/test_fuzzyranker
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```
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## Environment facts (verified)
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- Kate 25.12.3, KDE Frameworks 6, Qt 6.10, cmake 4.2.3, g++, extra-cmake-modules.
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- KTextEditor + KCoreAddons + KConfigWidgets + KXmlGui + KRunner dev headers present.
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- No Python/Pâté binding installed; C++ is the only first-class plugin path.
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