mirror of
https://github.com/chanzuckerberg/cellxgene.git
synced 2026-10-03 00:58:11 +08:00
Matt Weiden
1547a864c2
* Disable ColorBy button for truncated categories Fixes https://github.com/chanzuckerberg/cellxgene/issues/1156 For categories that have more than 100 labels we truncate the labels in the UI, but still allowed users to ColorBy these categories. Coloring by these categories can cause browsers to get bogged down. This commit disables ColorBy for truncated categories. * Minor documentation spelling and typo fixes * Respond to feedback from @liaprins-czi * Respond to feedback from @colinmegill and @bkmartinjr
45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
export default function cascadeReducers(arg) {
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/*
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Combine a set of cascading reducers into a single reducer. Cascading
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reducers are reducers which may rely on state computed by another reducer.
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Therefore, they:
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- must be composed in a particular order (currently, this is a simple
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linear list of reducers, run in list order)
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- must have access to partially updated "next state" so they can further
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derive state.
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Parameter is one of:
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- a Map object
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- an array of tuples, [ [key1, reducer1], [key2, reducer2], ... ]
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Ie, cascadeReducers([ ["a", reduceA], ["b", reduceB] ])
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Each reducer will be called with the signature:
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(prevState, action, sharedNextState, sharedPrevState) => newState
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cascadeReducers will build a composite newState object, much
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like combinedReducers. Additional semantics:
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- reducers guaranteed to be called in order
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- each reducer will receive shared objects
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*/
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const reducers = arg instanceof Map ? arg : new Map(arg);
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const reducerKeys = [...reducers.keys()];
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return (prevState, action) => {
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const nextState = {};
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let stateChange = false;
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for (let i = 0, l = reducerKeys.length; i < l; i += 1) {
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const key = reducerKeys[i];
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const reducer = reducers.get(key);
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const prevStateForKey = prevState ? prevState[key] : undefined;
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const nextStateForKey = reducer(
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prevStateForKey,
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action,
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nextState,
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prevState
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);
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nextState[key] = nextStateForKey;
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stateChange = stateChange || nextStateForKey !== prevStateForKey;
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}
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return stateChange ? nextState : prevState;
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};
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}
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