113 lines
4.4 KiB
JavaScript
113 lines
4.4 KiB
JavaScript
'use strict';
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exports.__esModule = true;
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exports.impureFinalPropsSelectorFactory = impureFinalPropsSelectorFactory;
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exports.pureFinalPropsSelectorFactory = pureFinalPropsSelectorFactory;
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exports.default = finalPropsSelectorFactory;
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var _verifySubselectors = require('./verifySubselectors');
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var _verifySubselectors2 = _interopRequireDefault(_verifySubselectors);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }
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function impureFinalPropsSelectorFactory(mapStateToProps, mapDispatchToProps, mergeProps, dispatch) {
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return function impureFinalPropsSelector(state, ownProps) {
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return mergeProps(mapStateToProps(state, ownProps), mapDispatchToProps(dispatch, ownProps), ownProps);
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};
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}
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function pureFinalPropsSelectorFactory(mapStateToProps, mapDispatchToProps, mergeProps, dispatch, _ref) {
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var areStatesEqual = _ref.areStatesEqual,
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areOwnPropsEqual = _ref.areOwnPropsEqual,
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areStatePropsEqual = _ref.areStatePropsEqual;
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var hasRunAtLeastOnce = false;
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var state = void 0;
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var ownProps = void 0;
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var stateProps = void 0;
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var dispatchProps = void 0;
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var mergedProps = void 0;
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function handleFirstCall(firstState, firstOwnProps) {
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state = firstState;
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ownProps = firstOwnProps;
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stateProps = mapStateToProps(state, ownProps);
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dispatchProps = mapDispatchToProps(dispatch, ownProps);
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mergedProps = mergeProps(stateProps, dispatchProps, ownProps);
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hasRunAtLeastOnce = true;
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return mergedProps;
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}
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function handleNewPropsAndNewState() {
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stateProps = mapStateToProps(state, ownProps);
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if (mapDispatchToProps.dependsOnOwnProps) dispatchProps = mapDispatchToProps(dispatch, ownProps);
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mergedProps = mergeProps(stateProps, dispatchProps, ownProps);
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return mergedProps;
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}
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function handleNewProps() {
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if (mapStateToProps.dependsOnOwnProps) stateProps = mapStateToProps(state, ownProps);
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if (mapDispatchToProps.dependsOnOwnProps) dispatchProps = mapDispatchToProps(dispatch, ownProps);
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mergedProps = mergeProps(stateProps, dispatchProps, ownProps);
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return mergedProps;
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}
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function handleNewState() {
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var nextStateProps = mapStateToProps(state, ownProps);
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var statePropsChanged = !areStatePropsEqual(nextStateProps, stateProps);
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stateProps = nextStateProps;
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if (statePropsChanged) mergedProps = mergeProps(stateProps, dispatchProps, ownProps);
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return mergedProps;
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}
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function handleSubsequentCalls(nextState, nextOwnProps) {
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var propsChanged = !areOwnPropsEqual(nextOwnProps, ownProps);
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var stateChanged = !areStatesEqual(nextState, state);
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state = nextState;
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ownProps = nextOwnProps;
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if (propsChanged && stateChanged) return handleNewPropsAndNewState();
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if (propsChanged) return handleNewProps();
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if (stateChanged) return handleNewState();
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return mergedProps;
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}
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return function pureFinalPropsSelector(nextState, nextOwnProps) {
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return hasRunAtLeastOnce ? handleSubsequentCalls(nextState, nextOwnProps) : handleFirstCall(nextState, nextOwnProps);
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};
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}
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// TODO: Add more comments
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// If pure is true, the selector returned by selectorFactory will memoize its results,
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// allowing connectAdvanced's shouldComponentUpdate to return false if final
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// props have not changed. If false, the selector will always return a new
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// object and shouldComponentUpdate will always return true.
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function finalPropsSelectorFactory(dispatch, _ref2) {
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var initMapStateToProps = _ref2.initMapStateToProps,
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initMapDispatchToProps = _ref2.initMapDispatchToProps,
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initMergeProps = _ref2.initMergeProps,
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options = _objectWithoutProperties(_ref2, ['initMapStateToProps', 'initMapDispatchToProps', 'initMergeProps']);
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var mapStateToProps = initMapStateToProps(dispatch, options);
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var mapDispatchToProps = initMapDispatchToProps(dispatch, options);
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var mergeProps = initMergeProps(dispatch, options);
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if (process.env.NODE_ENV !== 'production') {
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(0, _verifySubselectors2.default)(mapStateToProps, mapDispatchToProps, mergeProps, options.displayName);
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}
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var selectorFactory = options.pure ? pureFinalPropsSelectorFactory : impureFinalPropsSelectorFactory;
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return selectorFactory(mapStateToProps, mapDispatchToProps, mergeProps, dispatch, options);
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} |