TODO.md

TODO

Fix

• Deleting a character causes PieceTable to segfault, most likely from a bad cursor position
• Inserting a newline doesn't cause line to split
• Newlines not being written to file when saving
• Cursor offset is not correctly calculated after altering buffer contents. I.e inserting a newline into the middle of a line
• Backspace at start of line seems to fail sometimes and join only part of the line
• Cursor at end of document moving to the right causes a crash when there is no newline at the end
• Buffer calculated in buffer#reprocessRange references original file content, it should use updated line content
• TS queries after edit (i.e. remove @ from @import) still return old highlight tag despite updating tree
• Reparsing TS tree with custom reader impl causes TS to attempt to parse read results as UTF-16 despite encoding being set to UTF-8 (e.g. panic contains: ???:?:?: 0x10a4aff28 in _ts_decode_utf16 (???))
• Hard to replicate issue where shiftCursorRow indexes window lines out of bounds. Implies self.vx.screen.cursor_row is not updated correctly in some operation beforehand, likely to with insert/delete at the end of the buffer
• RwLock synchronisation over QueryHighlights map is a naive solution that needs better management. Maybe a segmented distributed map?
• Modifiers don't change inserted character correctly

Implement

• Mode system with NORMAL, INSERT, VISUAL and COMMAND
• Piece table based buffer and window system
• Cursor in insert mode should be a line instead of a block
• Cursor in insert mode should be able to hover over newline (whether it exists or not) to remove last character (before newline if exists)
• All operations (insert, append, set & delete) on FileBuffer need to update buffer_line_range_indices and buffer_offset_range_indices
• Treesitter parsing for lines in buffer, using output to style line segments
• Thread pool based rendering of each language highlight with main thread rendering un-highlighted text.
• Config loading
• Configurable colour scheme
• Query tree sitter using language highlights SCM
• Range based delete via visual mode
• Configurable key maps
• Insertion edits to tree sitter tree (i.e. adding a character and re-parsing)

Refactor

• Optimise language loading to generate switch at compile time
• Cache TS queries off heap (performed by a thread pool) and render cached results. Re-cache queries when tree changes.
• Updated cached entries for only section of tree that changes
• Improve draw() call structuring
• Updates should be pushed to a thread pool via queues and @atomicRmw done on a single background thread