| /** |
| * @license |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| |
| export function makeRefinable(selectorCreator) { |
| return function createSelector(source) { |
| const selector = selectorCreator(source); |
| |
| if (source.refinedBy) { |
| const refiningSelector = createSelector(source.refinedBy); |
| |
| return async function* matchAll(scope) { |
| const matches = selector(scope); |
| for await (let match of matches) { |
| const refiningScope = matchAsScope(match); |
| const refiningMatches = refiningSelector(refiningScope); |
| for await (let refiningMatch of refiningMatches) { |
| yield composeMatches(refiningMatch, match); |
| } |
| } |
| }; |
| } |
| |
| return selector; |
| }; |
| } |
| |
| function matchAsScope(match) { |
| return match[0]; |
| } |
| |
| function composeMatches(...matches) { |
| return matches.reverse().reduce((match, refiningMatch) => { |
| const refinedMatch = [...refiningMatch]; |
| refinedMatch.index = match.index + refiningMatch.index; |
| refinedMatch.input = match.input; |
| return refinedMatch; |
| }); |
| } |