Editor

Multi-line text editor with cursor, selection, copy/paste, optional line numbers, and auto-indent.

Constructor: NewEditor(id, class string) *Editor

Content access

• Text() string — full content as a single string
• Lines() []string — content as a slice of lines
• Load(text string) — replace content from a string
• SetContent(lines []string) — replace content from a line slice

Configuration

• SetAutoIndent(auto bool) — copy leading whitespace from the previous line on Enter
• SetReadOnly(ro bool) — disable editing without removing focusability
• SetTabWidth(width int) — visual width of a tab character
• UseSpaces(useSpaces bool) — insert spaces instead of tab characters
• ShowLineNumbers(show bool) — toggle the gutter

Cursor / movement

• Left() / Right() / Up() / Down() — move one character / line
• Home() / End() — start / end of current line
• DocumentHome() / DocumentEnd() — start / end of document
• PageUp() / PageDown() — scroll by one page
• MoveTo(line, column int) — jump to position

Editing

• Insert(ch rune) — insert a character at the cursor
• Delete() — backspace (delete before the cursor)
• DeleteForward() — delete at the cursor
• Enter() — insert a newline with optional auto-indent

Selection

• HasSelection() bool
• SelectAll(), ClearSelection()
• SelectionText() string — selected text
• DeleteSelection()
• ShiftLeft() / ShiftRight() / ShiftUp() / ShiftDown() / ShiftHome() / ShiftEnd() — extend selection by movement

Clipboard

• Copy() — copy the selection (uses the system clipboard via atotto/clipboard)
• Cut() — copy + delete
• Paste() — insert clipboard contents at the cursor

Events

Event	Data	Description
"change"	—	Content modified

Notes

Flags: "focusable", "readonly".

Backed by a gap-buffer per line for efficient editing in long files. Long lines are not wrapped; they scroll horizontally.