copyCellPositionAt

Copies the displayed cell under component-local Swing pixels x, y into caller-owned destination on the EDT.

The point's x is a zero-based logical column, before bidi permutation; its y is a zero-based row of the displayed frame, matching copyCellBounds. Rows are not absolute retained-history rows or live-screen coordinates. The position describes the currently displayed frame and can change after scrolling, frame publication, or layout changes.

Active-buffer padding, prompt gutters/dividers, fractional scrolling and clipping follow the shared display geometry. Wide leading and trailing halves return their own physical grid cells; blank cells are valid hits. Fractionally rounded adjacent cell bounds may share a boundary pixel; row selection follows the same fractional mapping as pointer input.

Returns false and sets destination to (-1, -1) outside displayed cells, including decoration bands, or for unavailable frames and unbound/disposed views. Points are never clamped to a nearby cell. Reuse one Point across calls; no result object is allocated. Existing bidi caches may rebuild for changed text. This performs no frame refresh or transport work.

Throws