Target OS X 10.10.
How does a view controller force an NSTextView to perform a search if it
doesn’t own the text view?
My application is a debugging tool to break an attributed string into style
runs and display the runs in a table. I’d like to double-click a row in the
table, and select the corresponding text in the NSTextView that displays the
string. Eventually, I’ll have to carry the character ranges in the table data
and use those, but this _should_ have been easy as a first attempt, and now my
blood is up.
The text view uses a find bar, the scroll view positions it at the top. The
text view is not editable, so the Replace UI isn’t shown. The bar shows, hides,
and functions as expected. The table and text are on different sides of a
split-view controller; their window controller tells the table controller about
the text view.
There’s no problem in responding to the double-click. The table’s controller
fills the find pasteboard with the text content of the run; other applications
show the run’s text in their search interfaces.
My current approach is this: (Swift)
@IBAction func tableDoubleClicked(sender: NSClickGestureRecognizer) {
loadFindPasteboard(sender) // App-specific, does what it says.
self.tag = 2
attributedTextView.performTextFinderAction(self)
}
-performTextFinderAction: is defined in NSResponder; NSTextFinder uses the
sender’s tag to determine the verb. (Smelly, yes — it expects an NSControl or
menu item, but duck-typing is not completely dead.) 2 is “find next.”
This works. Once. Thereafter, it’s erratic. The search field updates correctly,
but the selection matches the previous search string. (Again, the find PB
updates as expected in other apps.) Then the search field stops updating at
all, but pulses the selection as if a find-next had been performed. Maybe the
field doesn’t update, but the search result does. Using the find-panel
interface has the same result.
Evidently I’m in some sort of cache race that may be reasonable given the
expected use of NSTextFinder, but you’d hope a factored view controller of that
name could be used to… find text. I don’t see a way to force the flush, or to
force the text view’s finder to reload.
Ideas? Or should I give up and do the range highlighting I’ll have to do anyway
eventually?
— F
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