Integrated: 8366201: RichTextArea: remove allowUndo parameter

[Andy Goryachev]

On Mon, 20 Oct 2025 23:04:17 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> Original user feedback (see https://mail.openjdk.org/pipermail/openjfx-discuss/2025-August/000267.html ) called for adding an `allowUndo` parameter to `applyStyle()` and `setStyle()` methods similarly to `replaceText()`.
> 
> Upon further analysis, the `allowUndo` parameter was a mistake: allowing the application code to disable creating undo/redo entries messes up the internal undo/redo stack.
> There is an internal need (`UndoableChange`), but it should not be exposed via public API.
> 
> This PR also adds `isUndoRedoEnabled()` and `setUndoRedoEnabled()` to the `StyledTextModel`, as well as its forwarding aliases to `RichTextArea` to allow for the application to disable undo/redo temporarily, for example, when building a document from multiple segments.
> 
> WARNING this is an incompatible change, permitted because of the incubator.
> 
> There remains a possible issue with currently unlimited size of the undo/redo stack - perhaps we should limit its depth to maybe 100-200 entries, see https://bugs.openjdk.org/browse/JDK-8370447 .

This pull request has now been integrated.

Changeset: f8bef157
Author:    Andy Goryachev <angorya at openjdk.org>
URL:       https://git.openjdk.org/jfx/commit/f8bef1575781ae8b38fba9dddd5aaa34e11e597d
Stats:     314 lines in 17 files changed: 238 ins; 7 del; 69 mod

8366201: RichTextArea: remove allowUndo parameter

Reviewed-by: kcr, jdv

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PR: https://git.openjdk.org/jfx/pull/1941