{"version":3,"file":"tiptap-extension-character-count.cjs","sources":["../src/character-count.ts"],"sourcesContent":["import { Extension } from '@tiptap/core'\nimport { Node as ProseMirrorNode } from 'prosemirror-model'\nimport { Plugin, PluginKey } from 'prosemirror-state'\n\nexport interface CharacterCountOptions {\n  /**\n   * The maximum number of characters that should be allowed. Defaults to `0`.\n   */\n  limit: number | null | undefined,\n  /**\n   * The mode by which the size is calculated. Defaults to 'textSize'.\n   */\n  mode: 'textSize' | 'nodeSize',\n}\n\nexport interface CharacterCountStorage {\n  /**\n   * Get the number of characters for the current document.\n   */\n  characters: (options?: {\n    node?: ProseMirrorNode,\n    mode?: 'textSize' | 'nodeSize',\n  }) => number,\n\n  /**\n   * Get the number of words for the current document.\n   */\n  words: (options?: {\n    node?: ProseMirrorNode,\n  }) => number,\n}\n\nexport const CharacterCount = Extension.create<CharacterCountOptions, CharacterCountStorage>({\n  name: 'characterCount',\n\n  addOptions() {\n    return {\n      limit: null,\n      mode: 'textSize',\n    }\n  },\n\n  addStorage() {\n    return {\n      characters: () => 0,\n      words: () => 0,\n    }\n  },\n\n  onBeforeCreate() {\n    this.storage.characters = options => {\n      const node = options?.node || this.editor.state.doc\n      const mode = options?.mode || this.options.mode\n\n      if (mode === 'textSize') {\n        const text = node.textBetween(0, node.content.size, undefined, ' ')\n\n        return text.length\n      }\n\n      return node.nodeSize\n    }\n\n    this.storage.words = options => {\n      const node = options?.node || this.editor.state.doc\n      const text = node.textBetween(0, node.content.size, ' ', ' ')\n      const words = text\n        .split(' ')\n        .filter(word => word !== '')\n\n      return words.length\n    }\n  },\n\n  addProseMirrorPlugins() {\n    return [\n      new Plugin({\n        key: new PluginKey('characterCount'),\n        filterTransaction: (transaction, state) => {\n          const limit = this.options.limit\n\n          // Nothing has changed or no limit is defined. Ignore it.\n          if (!transaction.docChanged || limit === 0 || limit === null || limit === undefined) {\n            return true\n          }\n\n          const oldSize = this.storage.characters({ node: state.doc })\n          const newSize = this.storage.characters({ node: transaction.doc })\n\n          // Everything is in the limit. Good.\n          if (newSize <= limit) {\n            return true\n          }\n\n          // The limit has already been exceeded but will be reduced.\n          if (oldSize > limit && newSize > limit && newSize <= oldSize) {\n            return true\n          }\n\n          // The limit has already been exceeded and will be increased further.\n          if (oldSize > limit && newSize > limit && newSize > oldSize) {\n            return false\n          }\n\n          const isPaste = transaction.getMeta('paste')\n\n          // Block all exceeding transactions that were not pasted.\n          if (!isPaste) {\n            return false\n          }\n\n          // For pasted content, we try to remove the exceeding content.\n          const pos = transaction.selection.$head.pos\n          const over = newSize - limit\n          const from = pos - over\n          const to = pos\n\n          // It’s probably a bad idea to mutate transactions within `filterTransaction`\n          // but for now this is working fine.\n          transaction.deleteRange(from, to)\n\n          // In some situations, the limit will continue to be exceeded after trimming.\n          // This happens e.g. when truncating within a complex node (e.g. table)\n          // and ProseMirror has to close this node again.\n          // If this is the case, we prevent the transaction completely.\n          const updatedSize = this.storage.characters({ node: transaction.doc })\n\n          if (updatedSize > limit) {\n            return false\n          }\n\n          return true\n        },\n      }),\n    ]\n  },\n})\n"],"names":["Extension","Plugin","PluginKey"],"mappings":";;;;;;;AAgCa,MAAA,cAAc,GAAGA,cAAS,CAAC,MAAM,CAA+C;AAC3F,IAAA,IAAI,EAAE,gBAAgB;IAEtB,UAAU,GAAA;QACR,OAAO;AACL,YAAA,KAAK,EAAE,IAAI;AACX,YAAA,IAAI,EAAE,UAAU;SACjB,CAAA;KACF;IAED,UAAU,GAAA;QACR,OAAO;AACL,YAAA,UAAU,EAAE,MAAM,CAAC;AACnB,YAAA,KAAK,EAAE,MAAM,CAAC;SACf,CAAA;KACF;IAED,cAAc,GAAA;AACZ,QAAA,IAAI,CAAC,OAAO,CAAC,UAAU,GAAG,OAAO,IAAG;AAClC,YAAA,MAAM,IAAI,GAAG,CAAA,OAAO,KAAP,IAAA,IAAA,OAAO,uBAAP,OAAO,CAAE,IAAI,KAAI,IAAI,CAAC,MAAM,CAAC,KAAK,CAAC,GAAG,CAAA;AACnD,YAAA,MAAM,IAAI,GAAG,CAAA,OAAO,KAAA,IAAA,IAAP,OAAO,KAAP,KAAA,CAAA,GAAA,KAAA,CAAA,GAAA,OAAO,CAAE,IAAI,KAAI,IAAI,CAAC,OAAO,CAAC,IAAI,CAAA;YAE/C,IAAI,IAAI,KAAK,UAAU,EAAE;AACvB,gBAAA,MAAM,IAAI,GAAG,IAAI,CAAC,WAAW,CAAC,CAAC,EAAE,IAAI,CAAC,OAAO,CAAC,IAAI,EAAE,SAAS,EAAE,GAAG,CAAC,CAAA;gBAEnE,OAAO,IAAI,CAAC,MAAM,CAAA;AACnB,aAAA;YAED,OAAO,IAAI,CAAC,QAAQ,CAAA;AACtB,SAAC,CAAA;AAED,QAAA,IAAI,CAAC,OAAO,CAAC,KAAK,GAAG,OAAO,IAAG;AAC7B,YAAA,MAAM,IAAI,GAAG,CAAA,OAAO,KAAP,IAAA,IAAA,OAAO,uBAAP,OAAO,CAAE,IAAI,KAAI,IAAI,CAAC,MAAM,CAAC,KAAK,CAAC,GAAG,CAAA;AACnD,YAAA,MAAM,IAAI,GAAG,IAAI,CAAC,WAAW,CAAC,CAAC,EAAE,IAAI,CAAC,OAAO,CAAC,IAAI,EAAE,GAAG,EAAE,GAAG,CAAC,CAAA;YAC7D,MAAM,KAAK,GAAG,IAAI;iBACf,KAAK,CAAC,GAAG,CAAC;iBACV,MAAM,CAAC,IAAI,IAAI,IAAI,KAAK,EAAE,CAAC,CAAA;YAE9B,OAAO,KAAK,CAAC,MAAM,CAAA;AACrB,SAAC,CAAA;KACF;IAED,qBAAqB,GAAA;QACnB,OAAO;AACL,YAAA,IAAIC,uBAAM,CAAC;AACT,gBAAA,GAAG,EAAE,IAAIC,0BAAS,CAAC,gBAAgB,CAAC;AACpC,gBAAA,iBAAiB,EAAE,CAAC,WAAW,EAAE,KAAK,KAAI;AACxC,oBAAA,MAAM,KAAK,GAAG,IAAI,CAAC,OAAO,CAAC,KAAK,CAAA;;AAGhC,oBAAA,IAAI,CAAC,WAAW,CAAC,UAAU,IAAI,KAAK,KAAK,CAAC,IAAI,KAAK,KAAK,IAAI,IAAI,KAAK,KAAK,SAAS,EAAE;AACnF,wBAAA,OAAO,IAAI,CAAA;AACZ,qBAAA;AAED,oBAAA,MAAM,OAAO,GAAG,IAAI,CAAC,OAAO,CAAC,UAAU,CAAC,EAAE,IAAI,EAAE,KAAK,CAAC,GAAG,EAAE,CAAC,CAAA;AAC5D,oBAAA,MAAM,OAAO,GAAG,IAAI,CAAC,OAAO,CAAC,UAAU,CAAC,EAAE,IAAI,EAAE,WAAW,CAAC,GAAG,EAAE,CAAC,CAAA;;oBAGlE,IAAI,OAAO,IAAI,KAAK,EAAE;AACpB,wBAAA,OAAO,IAAI,CAAA;AACZ,qBAAA;;oBAGD,IAAI,OAAO,GAAG,KAAK,IAAI,OAAO,GAAG,KAAK,IAAI,OAAO,IAAI,OAAO,EAAE;AAC5D,wBAAA,OAAO,IAAI,CAAA;AACZ,qBAAA;;oBAGD,IAAI,OAAO,GAAG,KAAK,IAAI,OAAO,GAAG,KAAK,IAAI,OAAO,GAAG,OAAO,EAAE;AAC3D,wBAAA,OAAO,KAAK,CAAA;AACb,qBAAA;oBAED,MAAM,OAAO,GAAG,WAAW,CAAC,OAAO,CAAC,OAAO,CAAC,CAAA;;oBAG5C,IAAI,CAAC,OAAO,EAAE;AACZ,wBAAA,OAAO,KAAK,CAAA;AACb,qBAAA;;oBAGD,MAAM,GAAG,GAAG,WAAW,CAAC,SAAS,CAAC,KAAK,CAAC,GAAG,CAAA;AAC3C,oBAAA,MAAM,IAAI,GAAG,OAAO,GAAG,KAAK,CAAA;AAC5B,oBAAA,MAAM,IAAI,GAAG,GAAG,GAAG,IAAI,CAAA;oBACvB,MAAM,EAAE,GAAG,GAAG,CAAA;;;AAId,oBAAA,WAAW,CAAC,WAAW,CAAC,IAAI,EAAE,EAAE,CAAC,CAAA;;;;;AAMjC,oBAAA,MAAM,WAAW,GAAG,IAAI,CAAC,OAAO,CAAC,UAAU,CAAC,EAAE,IAAI,EAAE,WAAW,CAAC,GAAG,EAAE,CAAC,CAAA;oBAEtE,IAAI,WAAW,GAAG,KAAK,EAAE;AACvB,wBAAA,OAAO,KAAK,CAAA;AACb,qBAAA;AAED,oBAAA,OAAO,IAAI,CAAA;iBACZ;aACF,CAAC;SACH,CAAA;KACF;AACF,CAAA;;;;;"}