substance/model/EditingBehavior.js

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing systems.

class EditingBehavior {

  constructor() {
    this._merge = {}
    this._mergeComponents = {}
    this._break = {}
  }

  defineMerge(firstType, secondType, impl) {
    if (!this._merge[firstType]) {
      this._merge[firstType] = {}
    }
    this._merge[firstType][secondType] = impl
    return this
  }

  canMerge(firstType, secondType) {
    return (this._merge[firstType] && this._merge[firstType][secondType])
  }

  getMerger(firstType, secondType) {
    return this._merge[firstType][secondType]
  }

  defineComponentMerge(nodeType, impl) {
    this._mergeComponents[nodeType] = impl
  }

  canMergeComponents(nodeType) {
    return this._mergeComponents[nodeType]
  }

  getComponentMerger(nodeType) {
    return this._mergeComponents[nodeType]
  }

  defineBreak(nodeType, impl) {
    this._break[nodeType] = impl
    return this
  }

  canBreak(nodeType) {
    return this._break[nodeType]
  }

  getBreaker(nodeType) {
    return this._break[nodeType]
  }

}

export default EditingBehavior