Ramanpreet Nara 4e841f2114 Remember ShadowNode of RawText's parent in attribute string
Summary:
When a user clicks on some text, `RCTSurfaceTouchHandler` will call into a method on `RCTParagraphComponentView`. That method (i.e: `touchEventEmitter`) would be responsible for identifying the closest ancestral `<Text/>` component to which we should dispatch the `onPress` event, given the point where the user clicked. To answer this query, we'll use a data structure called `UIAttributedString`.

This data structure represents a string, and a corresponding mapping from sequences of its characters to some arbitrary data. In this attributed string, we'll map sequences of characters to their closest ancestral `ParagraphShadowNode` or `TextShadowNode`. That way, when we get a click event on `RCTParagraphComponentView`, we can just look at the character that was clicked, and use that information to do a lookup in the attributed string to find the shadow node who's EventEmitter is responsible for processing the click event.

Reviewed By: shergin

Differential Revision: D9696904

fbshipit-source-id: a199649981ad271afa85414ce4c3f056851348be
2018-09-10 11:41:31 -07:00
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2018-05-07 19:05:53 -07:00
2018-08-31 18:03:07 -07:00