Text and inputs

Read input and edit text

Single-line inputs and multiline text views have different accessors. input_text borrows the input's current text; text_get allocates a copy of a view's contents. Use Gui:text_free for that copy.

import gui
let copy_editor_to_label = fn (editor:u8*, label:u8*) -> i64 {
    let text = Gui:text_get(editor)
    if !text { return 0 }
    defer Gui:text_free(text)
    Gui:label_text(label, text)
    return 1
}

Choose borrowed or owned text

Copy borrowed input text before changing its widget or keeping it beyond a callback. editor creates editable monospace content without wrapping; text_view creates read-only output, and line_gutter provides a separate line-number view. text_set replaces all content.

Styling and positions

text_style creates a named tag owned by the text buffer. Apply it with text_apply_style(view, tag, start, finish), where [start, finish) uses character offsets, not UTF-8 byte offsets. Recompute ranges after editing; old offsets can point at different text.

text_position_at maps widget-local pixels to a character offset and returns -1 on failure. text_event_line returns a one-based line or -1. text_scroll_end is useful for append-style output after updating the buffer. A tag pointer must not outlive its owning buffer.