* Remove history coalesce

* Fix selction/crate not updated when do "redo" command

* Remove visualColumns.ts

* Move editor ts files

* Refactor textarea buffer

* Rename `EditSnippet` type to `TextareaSnapshot`

* Remove `Editor` component, introduce the `Editor` class for `File` component

* Update demo

* Update editor constants to set text and background color to transparent

* Rewrite rerender logic

* Format

* Remove dead code

* Fix caret postion on empty line

* Improve `renderSelectionRange` performance by using cached DOM elements

* Support range selection in textarea

* Improve rerender performance

* Use piece table data sturcture for the text document

* refactor

* Add public `setSelection` method for the `Editor` class

* Add `FileContentsWithLineOffsets` interface and update related components to support line offsets and line count. Refactor file handling to utilize computed line offsets for rendering and iteration.

* Add `updateRenderCacheAt` method to `FileRenderer` and `File` classes for improved rendering. Refactor theme handling in `Editor` to utilize a dedicated method for color map retrieval.

* Refactor file iteration logic by removing `iterateOverFile` utility and replacing it with direct loops in `VirtualizedFile` and `FileRenderer` components. Update line offset computation to exclude trailing newlines in multi-line files while maintaining correct line counts. Enhance tests to validate line counting behavior.

* Remove EOF field

* Remove text length fields from HistoryEntry and related test cases in EditHistory

* Rename class `EditHistory` to `EditStack`

* Refactor EditStack and PieceTable to use a unified text slice interface.

* Refactor PieceTable and TextDocument to improve line offset handling and remove unnecessary EOL trimming logic.

* Refactor `Editor` to utilize new dirty line resolution logic, enhancing performance and accuracy in line tracking.

* Fix multi-cursor textarea sync

* Refactor Editor rendering logic for improved performance and reduce direct DOM manipulation.

* Add grammer cache

* Enhance line position caching in Editor for improved performance and accuracy.

* Refactor indentation handling in Editor and remove unused utility function for improved clarity and performance.

* Fix testing types

* Improve performance of the `getCharacterX` method

* Improve caching mechanism for enhanced performance.

* Add maxEntries feature to EditStack for managing undo history size

* Refactor

* Enhance PieceTable and TextDocument to trim line endings in getLineText method, improving text handling consistency. Update related tests for accuracy.

* Refactor

* Add `BackgroundTokenzier` class

* Improve performance

* Fix hightlight bug

* Add `--diffs-bg-caret` css property

* Fix input

* Fix selection range rendering

* Fix prebuildStateStackCache funciton

* Update `TOKENIZE_MAX_LINE_LENGTH` to 10,000

* Add `DiffsEditor` interface

* Fix `lineAnnotations` argument on `triggerEdit` invoke

* Refactor editor edit method to accept onChange callback directly and update demo to log file changes

* Clean up

* typo

* Refactor BackgroundTokenizer to use message-based scheduling.

* Refactor editor focus handling by removing redundant event listeners and updating CSS selectors for caret visibility.

* Refactor

* Fix `toTextareaSelectionDirection` function

* Refactor

* Update `DiffsEditor` types

* Add line annotation handling

* Add documentation for `hasVisibleLineAnnotation` function.

* Get rid of enum

* Clean up

* Refactor

* Update editor CSS

* Support text wrap

* Clean up

* Fix line y/wrap cache

* Fix line cache

* Copies leading indentation onto the new line after Enter

* Focus textare after undo/redo

* Move multi-selection functions to editorSelection module

* Add support for handling leading indentation deletion in applyTextChangeToSelections

* Fix selection glitch bug

* Add extendSelection command

* Fix `focusTextare` function

* Fix `resolveTextareaChange` function

* Remove unnecessary target check in mouseup event listener in Editor class

* Fix textarea selction direction

* Fix selection bg color for safair

* Clean up

* Fix shift select

* Refactor

* Refactor

* Fix shift select delay

* Coalesce edit stack entries for simple typing or backspace operations.

* Add Support forward-delete coalescing for edit history

* docs: add docs for editStack module

* Refctor

* Fix 'documentStart' and 'documentEnd' commands

* Rewrite selection handle logic

* Fix shouldCoalesceEditStackEntry function

* Update demo

* Add `removeEditor` for File component

* Add react api

* Clean up

* Update demo app

* Refactor useFileInstance to remove redundant editor cleanup logic

* Fix `computeLineOffsets` function

* typo

* Update editor style

* Fix `getOrCreateLineOffSets` method

* Refactor line count and annotation handling in File component; remove hasVisibleLineAnnotation utility

* Fix lines deletion crocss virtul viewport

* Remove `normalizeSelectionsForDocument` function

* Fix `edit` function

* Add editor sub-module

* Use `contenteditable` model

* Fix line wrap

* Fix wrap line

* Fix selection on mobile

* Update editor style

* Fix resize handling

* Add editor overlay layer

* Cleanup

* Add `DiffsEditableComponent` types

* Fix `VirtualizedFile` component

* Update `DiffsEditableComponent` type

* Add editor demo

* Fix slection rendering

* Update editor demo app

* Fix VirualizedFile component

* Update editor demo app

* Fix some selection bugs

* Update demo app

* Refactor findNextNonOverlappingSubstring method into PieceTable and TextDocument

* Refactor

* feat: Implement line jump

* Fix selection rendering when scrolling

* Improve tokenzier performance

* feat: simple search pannel

* Update editor demo app

* Fix jump

* Update search UI

* Add lag radar

* Fix virtualizer

* Fix render range after typing

* Fix editor tokenzier cache

* Fix search input focus

* Update log rader position

* Improve piece table performance

* Refactor

* Add lag radar

* Fix line count for empty documents

* Fix offscreen lines flush

* Introduce gutter width tracking

* refactor

* Refactor

* fix import

* Add 'expandSelectionDocStart' and 'expandSelectionDocEnd' commands

* Fix buffer height

* Add matches text for the search pancel

* Disable preious/next icon when no matches

* Update style.css

* feat: Support `quiteEdit` action

* Update edtior demo app

* Refactor

* Update demo app

* Update demo app

* Fix girdRow when render quick edit UI

* Move testing files

* Clean up

* Add searchPanel.ts

* Fix expandCollapsedSelectionToWord to match when the cursor is immediately touching one of the word's boundaries

* clean up

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Fix typo

* Clean up searchPanel and quickEdit when swith file

* Rebase to beta-1.2

* Fix selection after clean up quick edit widget

* Fix virtual buffer

* Fix `updateWindowSelection` method of Editor class

* Fix render range when typing new line at the end of the file

* Fix buffer when adding large lines

* [editor] Support 'deleteHardLineForward' input

* Add `insertTranspose` input

* Move `change` handler to options

* Update css

* Merge beta-1.2 changes

* Fix emply line rendering

* Add search settings UI

* Merge branch 'main' into editor

* Support FileDiff component

* Update `DiffsEditableComponent` interface

* Fix `getSelectionAnchor` function

* Fix text measurement for emoji

* Increase delay for diff rendering in FileDiff component

* Update types

* Add unit testings for text measue functions

* Clean up dirty render cache

* Fix `lineAnnotations` re-rendering

* Disable gutter utility when editing

* Add global css

* Fix scrollToLine method

* Refactor selection handling in Editor class to initialize selections properly and streamline rendering logic

* Fix diffs components

* Allow to create selection from gutter interaction

* Fix focus

* Fix browser compatibility

* Support dual themes

* Fix selection bugs

* refactor

* Add `Metrics` class

* Clean up

* Fix wrap selection rendering on safari

* Add `QuickEditContext` types

* Fix caret scroll margin when search panel is on

* Refactor search panel widget

* Fix selection position

* Update react components

* Update search panel CSS

* Fix quick edit

* Add editor docs

* Fix react hooks for editor

* Update editor demo component

* Update Quick Edit docs

* Update `diffStyle` and `expandUnchanged` options when editing

* demo: remove editor route

* Update docs

* Update docs

* Update examples

* Reset selection when 'Esc' key pressed

* Fix selection focus

* Add 'enable edit' shortcut('e')

* Handle the arrow key events to scroll to the cursor position manually

* Merge of overlapping selections

* Handle cursor moving events

* Fix scroll margin top

* Add debug logging option to Editor class

* Fix selection bugs

* Fix selection renering for unified `FileDiff`

* Reset ignore selection change flag on mouse up event

* Clean up

* fix bun.lock

* Add editor theme style

* Refactor

* Fix react types

* Fix last line index calculation

* Update condition for marking DOM dirty in VirtualizedFile component

* Throw if someone is trying to edit with no editor instance

* Update `mergeFileDiffOptions` function

* `lineOffsets` -> `lines`

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Editor

`additionLines`/`deletionLines` change from `string[]` to `DiffLines`: a plain
data object holding a file's lines as one UTF-8 byte arena plus an offset table,
decoded on demand via `lineAt` / `joinLines`. On a huge diff (linux v6..v7,
~22.8M lines across ~77k files) this avoids tens of millions of tiny `String`
objects, so the V8 heap drops ~33% on that compare and the parser is faster: it
no longer encode+decode-detaches every line, it encodes once on seal and decodes
only the visible (virtualized) lines.

It is plain data on purpose, so it survives structured clone (the highlight
worker), `structuredClone`, and IndexedDB without a revive step (no class, no
prototype to drop). `.length` stays a field, so the many `.length` consumers are
unchanged; only content reads migrate (`x[i]` -> `lineAt(x, i)`,
`x.join('')` -> `joinLines(x)`). Per-file offsets use the smallest int width that
fits the file. A file with a lone surrogate keeps exact strings as a fallback,
and merge-conflict diffs keep plain strings (no encode) so their parse stays at
parity. The parsed model is byte-identical to before (snapshot + content-hash).

Adds diffLines.test.ts (arena round-trip, multibyte, emoji-keeps-arena, lone-surrogate fallback, BOM, offset-width, plainLines, joinLines, isWellFormed) and a withPlainLines snapshot converter so the existing parsed-model snapshots assert byte-identical line content.

The byte-arena type change makes additionLines/deletionLines a DiffLines, so the editor's FileDiff whole-side accessors (getDeletionFile/getAdditionFile) read them with joinLines(...) instead of .join('').