Module: reefvision.widgets.textarea

Source: ./reefvision/widgets/textarea.reef

Overview

reefvision.widgets.textarea — multi-line editor (Wave 5)

object TextArea extends view.View. Lines stored separately; caret is (row, col). Vertical scroll via offset; last client column is the scrollbar hit-test when line_count > visible_rows (Task 8: client column, not window frame gutter).

MVP: ASCII printable insert; Enter splits; Backspace joins. Typing returns event_handled() (consumed, command 0). Insertion is Group.add.

Usage: let ed = new textarea.TextArea(cell.rect(0, 0, 48, 8), 128, 8, 100) ed.paste("hello\nworld") win.add(ed)

Objects

TextArea

Extends: view.View

Fields:

proc init(bounds: cell.Rect, max_lines: int, visible_rows: int, max_line_len: int)

Methods:

override shared fn wants_focus(): bool

override shared fn captures_mouse(): bool

shared fn line_count(): int

shared fn line(row: int): string

shared fn caret_row(): int

shared fn caret_col(): int

shared fn offset(): int

shared fn visible_rows(): int

shared fn max_lines(): int

shared fn max_line_len(): int

shared fn has_scrollbar(): bool

shared fn is_sb_dragging(): bool

exclusive proc clamp_caret()

exclusive proc ensure_visible()

exclusive proc scroll_by(delta: int)

exclusive proc set_caret(row: int, col: int)

exclusive proc paste(text: string)

shared fn text(): string

exclusive proc set_text(text: string)

override exclusive proc draw(buf: cell.CellBuffer, abs: cell.Rect, clip: cell.Rect, focused: bool, th: theme.Theme)

exclusive proc shift_lines_down(from: int)

exclusive proc shift_lines_up(from: int)

exclusive proc split_line_at_caret()

exclusive proc join_with_prev()

override exclusive fn handle_event(e: event.Event): view.EventResult

exclusive proc set_offset_from_y(abs_bounds: cell.Rect, y: int)

exclusive fn handle_mouse(e: event.Event): bool

Functions

fn max_lines_cap(): int

fn max_line_cap(): int

fn empty_line(): string

fn clamp_col(line: string, col: int): int

fn insert_char_line(line: string, col: int, cp: int, max_len: int): string

fn delete_before_line(line: string, col: int): string

fn delete_at_line(line: string, col: int): string

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