Processing of CSS of changes

[obcardinal]

I have the listener:
https://github.com/TomasMikula/RichTextFX/blob/master/richtextfx-demos/src/main/java/org/fxmisc/richtext/demo/JavaKeywordsAsync.java#L93-L106

After compute highlighting, I run checker syntax, and use setStyleClass method to CodeArea if an error or an assign operation have met. But when I do this, listener of CodeArea begin do task again and again. Whether I can make so that the listener didn't pay attention on CSS changes?

[JordanMartinez]

Sorry, could you describe your problem again? I am finding it difficult to understand you.

[obcardinal]

Yes, when I typed anything at CodeArea, listener above compute highlighting.
I add a method, that compute correct syntax of code, and run after highlight:

private void applyHighlighting(StyleSpans<Collection<String>> highlighting) {
        this.setStyleSpans(0, highlighting);
        syntax.compute(this);
}

At the syntax.compute(this), If this method meet an error at the source code, I add a class to CodeArea with from and to positions: codePlace.setStyleClass(from, to, "error");

After that, the listener see this changes CSS, and run again method described above: applyHighlighting.
I don't want to reload the computing highlight if CodeArea has any changes with CSS classes/positions.

[JordanMartinez]

Oh ok. Here's what's going on and why your problem is occurring:

1. The area's text or style is changed, so an event is emitted
2. After 500 ms of inactivity, the computeHighlighting method (which returns the spans of styles to apply to the area's text) is called
3. Once that task is finished, it applies those style spans to the area via setStyleSpans.
4. You call syntax.compute, which then calls setStyleClass.
5. setStyleClass ultimately calls area.replace, which triggers a change in the area's underlying document. Go to Step 1 and loop infinitely

You need to run your syntax computation method in computeHighlighting, not in applyHighlighting, and somehow integrate it into the returned StyleSpans object.

[obcardinal]

Thank you. It will be difficult to integrate with StyleSpans.
In version 0.7-M5, I can't work with this object, there is some equivalent?

[JordanMartinez]

Try StyleSpansBuilder

[obcardinal]

Sorry, I haven't noticed that packages have changed.
I resolved my problem with tricks.

1. For CSS changes, at the filter, I added condition for compare last text and current text at the CodeArea
2. At the Syntax highlighting, I used Platform.runLater and received blinking highlight of syntax. For resolve this problem, I created new CodeArea for CSS operations at the end of computing, I get CSS from here and set at the "drawing" CodeArea.

Thank you very much, I didn't expect so fast response!

[JordanMartinez]

Glad you figured out a solution!