d2-ui
Version:
39 lines (34 loc) • 1.21 kB
JavaScript
/**
* Copyright (c) 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule adjustBlockDepthForContentState
* @typechecks
*
*/
;
function adjustBlockDepthForContentState(contentState, selectionState, adjustment, maxDepth) {
var startKey = selectionState.getStartKey();
var endKey = selectionState.getEndKey();
var blockMap = contentState.getBlockMap();
var blocks = blockMap.toSeq().skipUntil(function (_, k) {
return k === startKey;
}).takeUntil(function (_, k) {
return k === endKey;
}).concat([[endKey, blockMap.get(endKey)]]).map(function (block) {
var depth = block.getDepth() + adjustment;
depth = Math.max(0, Math.min(depth, maxDepth));
return block.set('depth', depth);
});
blockMap = blockMap.merge(blocks);
return contentState.merge({
blockMap: blockMap,
selectionBefore: selectionState,
selectionAfter: selectionState
});
}
module.exports = adjustBlockDepthForContentState;