https://bugs.webkit.org/show_bug.cgi?id=122151

Reviewed by Joseph Pecoraro.

Identify if the hovered token is contained within the text selection (if any) and use
the selection as the hovered expression to allow the user to select text and hover it
to see what it evaluates to.

* UserInterface/CodeMirrorTokenTrackingController.js:
(WebInspector.CodeMirrorTokenTrackingController.prototype.highlightRange):
Check we're trying to highlight a different range before removing the highlight
and applying the new one, this prevents the marked text from flashing if it's
being re-hovered which would easily happen when hovering multiple tokens within
the same selection.

(WebInspector.CodeMirrorTokenTrackingController.prototype._processJavaScriptExpression):
In the case where there is selected text, check whether the hovered token is at least
partially contained within the selection, and if so use the selection text as the
hovered expression to evaluate.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@156728 268f45cc-cd09-0410-ab3c-d52691b4dbfc