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# Dialer Search Ui
searchfragment/ contains all code relevant to loading, rendering and filtering
search results in both dialpad search and regular search.
## Loading
### On Device Contacts
On device contacts loading happens in SearchContactsCursorLoader. It is used in
conjunction with NewSearchFragment and Loader Callbacks to return a cursor from
cp2 containing all of the relevant info needed to rendering.
### Business Search
// TODO(calderwoodra)
### Google Directory Search
// TODO(calderwoodra)
## Rendering
NewSearchFragment, SearchAdapter, SearchContactViewHolder and
SearchCursorManager are used to render contact information. The fragment's
recyclerview, adapter and viewholder work as expected like a normal recyclerview
paradigm.
The are three things to note about rendering:
* There are three data sources rendered: On device contacts, business search
results and google directory results.
* SearchContactsCursorLoader returns its cursor from cp2 and we filter/wrap it
with SearchContactCursor to render useful results (see below).
* SearchCursorManager is used to coalesce all three data sources to help with
determining row count, row type and returning the correct data source for
each position.
## Filtering
On device contacts are filtered using SearchContactCursor. We wrap the cursor
returned from SearchContactsCursorLoader in NewSearchFragment#onLoadFinished in
order to abstract away the filtering logic from the recyclerview adapter and
viewholders.
SearchContactCursor applies filtering in SearchContactCursor#filter to remove
duplicate phone numbers returned from cp2 and phone numbers that do not match
the given search query.
Filtering methods used are:
* T9/dialpad search methods
* Initial match (957 matches [W]illiam [J]ohn [S]mith)
* Number + name match (1800946 matches [1800-Win]-A-Prize)
* Numeric/dialpad search methods
* Simple number match (510333 matches [510-333]-7596)
* Country-code agnostic matching for E164 normalized numbers (9177 matches
+65[9177]6930)
* Country-code agnostic matching (510333 matches 1-[510-333]-7596)
* Area-code agnostic matching (333 matches 510-[333]-7596)
* Name/keyboard search methods:
* Simple name match (564 matches [Joh]n)
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