forked from Gitlink/forgeplus-react
69 lines
2.4 KiB
Plaintext
69 lines
2.4 KiB
Plaintext
/**
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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 ContentStateInlineStyle
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* @format
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* @flow
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*/
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'use strict';
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import type ContentState from './ContentState';
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import type SelectionState from './SelectionState';
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var CharacterMetadata = require('./CharacterMetadata');
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var { Map } = require('immutable');
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var ContentStateInlineStyle = {
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add: function (contentState: ContentState, selectionState: SelectionState, inlineStyle: string): ContentState {
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return modifyInlineStyle(contentState, selectionState, inlineStyle, true);
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},
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remove: function (contentState: ContentState, selectionState: SelectionState, inlineStyle: string): ContentState {
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return modifyInlineStyle(contentState, selectionState, inlineStyle, false);
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}
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};
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function modifyInlineStyle(contentState: ContentState, selectionState: SelectionState, inlineStyle: string, addOrRemove: boolean): ContentState {
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var blockMap = contentState.getBlockMap();
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var startKey = selectionState.getStartKey();
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var startOffset = selectionState.getStartOffset();
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var endKey = selectionState.getEndKey();
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var endOffset = selectionState.getEndOffset();
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var newBlocks = blockMap.skipUntil((_, k) => k === startKey).takeUntil((_, k) => k === endKey).concat(Map([[endKey, blockMap.get(endKey)]])).map((block, blockKey) => {
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var sliceStart;
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var sliceEnd;
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if (startKey === endKey) {
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sliceStart = startOffset;
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sliceEnd = endOffset;
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} else {
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sliceStart = blockKey === startKey ? startOffset : 0;
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sliceEnd = blockKey === endKey ? endOffset : block.getLength();
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}
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var chars = block.getCharacterList();
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var current;
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while (sliceStart < sliceEnd) {
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current = chars.get(sliceStart);
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chars = chars.set(sliceStart, addOrRemove ? CharacterMetadata.applyStyle(current, inlineStyle) : CharacterMetadata.removeStyle(current, inlineStyle));
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sliceStart++;
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}
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return block.set('characterList', chars);
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});
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return contentState.merge({
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blockMap: blockMap.merge(newBlocks),
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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 = ContentStateInlineStyle; |