forked from Gitlink/forgeplus-react
39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
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/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule adjustBlockDepthForContentState
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* @format
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*
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*/
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'use strict';
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function adjustBlockDepthForContentState(contentState, selectionState, adjustment, maxDepth) {
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var startKey = selectionState.getStartKey();
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var endKey = selectionState.getEndKey();
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var blockMap = contentState.getBlockMap();
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var blocks = blockMap.toSeq().skipUntil(function (_, k) {
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return k === startKey;
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}).takeUntil(function (_, k) {
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return k === endKey;
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}).concat([[endKey, blockMap.get(endKey)]]).map(function (block) {
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var depth = block.getDepth() + adjustment;
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depth = Math.max(0, Math.min(depth, maxDepth));
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return block.set('depth', depth);
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});
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blockMap = blockMap.merge(blocks);
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return contentState.merge({
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blockMap: blockMap,
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selectionBefore: selectionState,
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selectionAfter: selectionState
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});
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}
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module.exports = adjustBlockDepthForContentState;
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