#7275: Paste from Office should use the same instance of StylesProcessor as editor

[niegowski]

Suggested merge commit message (convention)

Fix (paste-from-office): Paste from Office should use the same instance of StylesProcessor as editor. Closes #7275.

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Additional information

[Reinmar]

cc @ckeditor/qa-team

[jodator]

Without digging much into it. The PR found the real problem there.

This was because the MSWord normalizer creates a new View document to parse clipboard content despite the fact that we already have one created by Clipboard. The problem with this approach is that we have to take care of proper view document creation in two places (in the editor and here). AFAICS this relates to:

• proper styles processor definitions must be passed from editor document
• the DOM converter must use the same blockFillerMode

[jodator]

To be a bit more fluent about this - As I still remember more or less what is happening in PFO and styles normalization the PR solution is OK 👍 but I didn't check the tests, comments, etc. So it might require double check.

ps.: I've just saw the missing inheritDoc annotation in MSWordNormalizer ;)

[FilipTokarski]

I checked it and pasted content looks pretty good now. It solves the latest issues with highlight and background colors in tables pasted from Word 👍

[jodator]

Dobule checked ;) AFAICS the other new StylesProcessors() usages are legit.