matrix-react-sdk/lib/editor/position.js

SDK for matrix.org using React

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _offset = _interopRequireDefault(require("./offset"));

/*
Copyright 2019 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
class DocumentPosition
/*:: implements IPosition*/
{
  constructor(index
  /*: number*/
  , offset
  /*: number*/
  ) {
    this.index
    /*:: */
    = index
    /*:: */
    ;
    this.offset
    /*:: */
    = offset
    /*:: */
    ;
  }

  compare(otherPos
  /*: DocumentPosition*/
  ) {
    if (this.index === otherPos.index) {
      return this.offset - otherPos.offset;
    } else {
      return this.index - otherPos.index;
    }
  }

  iteratePartsBetween(other
  /*: DocumentPosition*/
  , model
  /*: EditorModel*/
  , callback
  /*: Callback*/
  ) {
    if (this.index === -1 || other.index === -1) {
      return;
    }

    const [startPos, endPos] = this.compare(other) < 0 ? [this, other] : [other, this];

    if (startPos.index === endPos.index) {
      callback(model.parts[this.index], startPos.offset, endPos.offset);
    } else {
      const firstPart = model.parts[startPos.index];
      callback(firstPart, startPos.offset, firstPart.text.length);

      for (let i = startPos.index + 1; i < endPos.index; ++i) {
        const part = model.parts[i];
        callback(part, 0, part.text.length);
      }

      const lastPart = model.parts[endPos.index];
      callback(lastPart, 0, endPos.offset);
    }
  }

  forwardsWhile(model
  /*: EditorModel*/
  , predicate
  /*: Predicate*/
  ) {
    if (this.index === -1) {
      return this;
    }

    let {
      index,
      offset
    } = this;
    const {
      parts
    } = model;

    while (index < parts.length) {
      const part = parts[index];

      while (offset < part.text.length) {
        if (!predicate(index, offset, part)) {
          return new DocumentPosition(index, offset);
        }

        offset += 1;
      } // end reached


      if (index === parts.length - 1) {
        return new DocumentPosition(index, offset);
      } else {
        index += 1;
        offset = 0;
      }
    }
  }

  backwardsWhile(model
  /*: EditorModel*/
  , predicate
  /*: Predicate*/
  ) {
    if (this.index === -1) {
      return this;
    }

    let {
      index,
      offset
    } = this;
    const parts = model.parts;

    while (index >= 0) {
      const part = parts[index];

      while (offset > 0) {
        if (!predicate(index, offset - 1, part)) {
          return new DocumentPosition(index, offset);
        }

        offset -= 1;
      } // start reached


      if (index === 0) {
        return new DocumentPosition(index, offset);
      } else {
        index -= 1;
        offset = parts[index].text.length;
      }
    }
  }

  asOffset(model
  /*: EditorModel*/
  ) {
    if (this.index === -1) {
      return new _offset.default(0, true);
    }

    let offset = 0;

    for (let i = 0; i < this.index; ++i) {
      offset += model.parts[i].text.length;
    }

    offset += this.offset;
    const lastPart = model.parts[this.index];
    const atEnd = !lastPart || offset >= lastPart.text.length; // if no last part, we're at the end

    return new _offset.default(offset, atEnd);
  }

  isAtEnd(model
  /*: EditorModel*/
  ) {
    if (model.parts.length === 0) {
      return true;
    }

    const lastPartIdx = model.parts.length - 1;
    const lastPart = model.parts[lastPartIdx];
    return this.index === lastPartIdx && this.offset === lastPart.text.length;
  }

  isAtStart() {
    return this.index === 0 && this.offset === 0;
  }

}

exports.default = DocumentPosition;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../src/editor/position.ts"],"names":["DocumentPosition","constructor","index","offset","compare","otherPos","iteratePartsBetween","other","model","callback","startPos","endPos","parts","firstPart","text","length","i","part","lastPart","forwardsWhile","predicate","backwardsWhile","asOffset","DocumentOffset","atEnd","isAtEnd","lastPartIdx","isAtStart"],"mappings":";;;;;;;;;AAgBA;;AAhBA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAce,MAAMA;AAAN;AAA4C;AACvDC,EAAAA,WAAW,CAAiBC;AAAjB;AAAA,IAAgDC;AAAhD;AAAA,IAAgE;AAAA,SAA/CD;AAA+C;AAAA,MAA/CA;AAA+C;AAAA;AAAA,SAAhBC;AAAgB;AAAA,MAAhBA;AAAgB;AAAA;AAC1E;;AAEDC,EAAAA,OAAO,CAACC;AAAD;AAAA,IAA6B;AAChC,QAAI,KAAKH,KAAL,KAAeG,QAAQ,CAACH,KAA5B,EAAmC;AAC/B,aAAO,KAAKC,MAAL,GAAcE,QAAQ,CAACF,MAA9B;AACH,KAFD,MAEO;AACH,aAAO,KAAKD,KAAL,GAAaG,QAAQ,CAACH,KAA7B;AACH;AACJ;;AAEDI,EAAAA,mBAAmB,CAACC;AAAD;AAAA,IAA0BC;AAA1B;AAAA,IAA8CC;AAA9C;AAAA,IAAkE;AACjF,QAAI,KAAKP,KAAL,KAAe,CAAC,CAAhB,IAAqBK,KAAK,CAACL,KAAN,KAAgB,CAAC,CAA1C,EAA6C;AACzC;AACH;;AACD,UAAM,CAACQ,QAAD,EAAWC,MAAX,IAAqB,KAAKP,OAAL,CAAaG,KAAb,IAAsB,CAAtB,GAA0B,CAAC,IAAD,EAAOA,KAAP,CAA1B,GAA0C,CAACA,KAAD,EAAQ,IAAR,CAArE;;AACA,QAAIG,QAAQ,CAACR,KAAT,KAAmBS,MAAM,CAACT,KAA9B,EAAqC;AACjCO,MAAAA,QAAQ,CAACD,KAAK,CAACI,KAAN,CAAY,KAAKV,KAAjB,CAAD,EAA0BQ,QAAQ,CAACP,MAAnC,EAA2CQ,MAAM,CAACR,MAAlD,CAAR;AACH,KAFD,MAEO;AACH,YAAMU,SAAS,GAAGL,KAAK,CAACI,KAAN,CAAYF,QAAQ,CAACR,KAArB,CAAlB;AACAO,MAAAA,QAAQ,CAACI,SAAD,EAAYH,QAAQ,CAACP,MAArB,EAA6BU,SAAS,CAACC,IAAV,CAAeC,MAA5C,CAAR;;AACA,WAAK,IAAIC,CAAC,GAAGN,QAAQ,CAACR,KAAT,GAAiB,CAA9B,EAAiCc,CAAC,GAAGL,MAAM,CAACT,KAA5C,EAAmD,EAAEc,CAArD,EAAwD;AACpD,cAAMC,IAAI,GAAGT,KAAK,CAACI,KAAN,CAAYI,CAAZ,CAAb;AACAP,QAAAA,QAAQ,CAACQ,IAAD,EAAO,CAAP,EAAUA,IAAI,CAACH,IAAL,CAAUC,MAApB,CAAR;AACH;;AACD,YAAMG,QAAQ,GAAGV,KAAK,CAACI,KAAN,CAAYD,MAAM,CAACT,KAAnB,CAAjB;AACAO,MAAAA,QAAQ,CAACS,QAAD,EAAW,CAAX,EAAcP,MAAM,CAACR,MAArB,CAAR;AACH;AACJ;;AAEDgB,EAAAA,aAAa,CAACX;AAAD;AAAA,IAAqBY;AAArB;AAAA,IAA2C;AACpD,QAAI,KAAKlB,KAAL,KAAe,CAAC,CAApB,EAAuB;AACnB,aAAO,IAAP;AACH;;AAED,QAAI;AAACA,MAAAA,KAAD;AAAQC,MAAAA;AAAR,QAAkB,IAAtB;AACA,UAAM;AAACS,MAAAA;AAAD,QAAUJ,KAAhB;;AACA,WAAON,KAAK,GAAGU,KAAK,CAACG,MAArB,EAA6B;AACzB,YAAME,IAAI,GAAGL,KAAK,CAACV,KAAD,CAAlB;;AACA,aAAOC,MAAM,GAAGc,IAAI,CAACH,IAAL,CAAUC,MAA1B,EAAkC;AAC9B,YAAI,CAACK,SAAS,CAAClB,KAAD,EAAQC,MAAR,EAAgBc,IAAhB,CAAd,EAAqC;AACjC,iBAAO,IAAIjB,gBAAJ,CAAqBE,KAArB,EAA4BC,MAA5B,CAAP;AACH;;AACDA,QAAAA,MAAM,IAAI,CAAV;AACH,OAPwB,CAQzB;;;AACA,UAAID,KAAK,KAAMU,KAAK,CAACG,MAAN,GAAe,CAA9B,EAAkC;AAC9B,eAAO,IAAIf,gBAAJ,CAAqBE,KAArB,EAA4BC,MAA5B,CAAP;AACH,OAFD,MAEO;AACHD,QAAAA,KAAK,IAAI,CAAT;AACAC,QAAAA,MAAM,GAAG,CAAT;AACH;AACJ;AACJ;;AAEDkB,EAAAA,cAAc,CAACb;AAAD;AAAA,IAAqBY;AAArB;AAAA,IAA2C;AACrD,QAAI,KAAKlB,KAAL,KAAe,CAAC,CAApB,EAAuB;AACnB,aAAO,IAAP;AACH;;AAED,QAAI;AAACA,MAAAA,KAAD;AAAQC,MAAAA;AAAR,QAAkB,IAAtB;AACA,UAAMS,KAAK,GAAGJ,KAAK,CAACI,KAApB;;AACA,WAAOV,KAAK,IAAI,CAAhB,EAAmB;AACf,YAAMe,IAAI,GAAGL,KAAK,CAACV,KAAD,CAAlB;;AACA,aAAOC,MAAM,GAAG,CAAhB,EAAmB;AACf,YAAI,CAACiB,SAAS,CAAClB,KAAD,EAAQC,MAAM,GAAG,CAAjB,EAAoBc,IAApB,CAAd,EAAyC;AACrC,iBAAO,IAAIjB,gBAAJ,CAAqBE,KAArB,EAA4BC,MAA5B,CAAP;AACH;;AACDA,QAAAA,MAAM,IAAI,CAAV;AACH,OAPc,CAQf;;;AACA,UAAID,KAAK,KAAK,CAAd,EAAiB;AACb,eAAO,IAAIF,gBAAJ,CAAqBE,KAArB,EAA4BC,MAA5B,CAAP;AACH,OAFD,MAEO;AACHD,QAAAA,KAAK,IAAI,CAAT;AACAC,QAAAA,MAAM,GAAGS,KAAK,CAACV,KAAD,CAAL,CAAaY,IAAb,CAAkBC,MAA3B;AACH;AACJ;AACJ;;AAEDO,EAAAA,QAAQ,CAACd;AAAD;AAAA,IAAqB;AACzB,QAAI,KAAKN,KAAL,KAAe,CAAC,CAApB,EAAuB;AACnB,aAAO,IAAIqB,eAAJ,CAAmB,CAAnB,EAAsB,IAAtB,CAAP;AACH;;AACD,QAAIpB,MAAM,GAAG,CAAb;;AACA,SAAK,IAAIa,CAAC,GAAG,CAAb,EAAgBA,CAAC,GAAG,KAAKd,KAAzB,EAAgC,EAAEc,CAAlC,EAAqC;AACjCb,MAAAA,MAAM,IAAIK,KAAK,CAACI,KAAN,CAAYI,CAAZ,EAAeF,IAAf,CAAoBC,MAA9B;AACH;;AACDZ,IAAAA,MAAM,IAAI,KAAKA,MAAf;AACA,UAAMe,QAAQ,GAAGV,KAAK,CAACI,KAAN,CAAY,KAAKV,KAAjB,CAAjB;AACA,UAAMsB,KAAK,GAAG,CAACN,QAAD,IAAaf,MAAM,IAAIe,QAAQ,CAACJ,IAAT,CAAcC,MAAnD,CAVyB,CAUkC;;AAC3D,WAAO,IAAIQ,eAAJ,CAAmBpB,MAAnB,EAA2BqB,KAA3B,CAAP;AACH;;AAEDC,EAAAA,OAAO,CAACjB;AAAD;AAAA,IAAqB;AACxB,QAAIA,KAAK,CAACI,KAAN,CAAYG,MAAZ,KAAuB,CAA3B,EAA8B;AAC1B,aAAO,IAAP;AACH;;AACD,UAAMW,WAAW,GAAGlB,KAAK,CAACI,KAAN,CAAYG,MAAZ,GAAqB,CAAzC;AACA,UAAMG,QAAQ,GAAGV,KAAK,CAACI,KAAN,CAAYc,WAAZ,CAAjB;AACA,WAAO,KAAKxB,KAAL,KAAewB,WAAf,IAA8B,KAAKvB,MAAL,KAAgBe,QAAQ,CAACJ,IAAT,CAAcC,MAAnE;AACH;;AAEDY,EAAAA,SAAS,GAAG;AACR,WAAO,KAAKzB,KAAL,KAAe,CAAf,IAAoB,KAAKC,MAAL,KAAgB,CAA3C;AACH;;AA1GsD","sourcesContent":["/*\nCopyright 2019 The Matrix.org Foundation C.I.C.\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n*/\n\nimport DocumentOffset from \"./offset\";\nimport EditorModel from \"./model\";\nimport {Part} from \"./parts\";\n\nexport interface IPosition {\n    index: number;\n    offset: number;\n}\n\ntype Callback = (part: Part, startIdx: number, endIdx: number) => void;\nexport type Predicate = (index: number, offset: number, part: Part) => boolean;\n\nexport default class DocumentPosition implements IPosition {\n    constructor(public readonly index: number, public readonly offset: number) {\n    }\n\n    compare(otherPos: DocumentPosition) {\n        if (this.index === otherPos.index) {\n            return this.offset - otherPos.offset;\n        } else {\n            return this.index - otherPos.index;\n        }\n    }\n\n    iteratePartsBetween(other: DocumentPosition, model: EditorModel, callback: Callback) {\n        if (this.index === -1 || other.index === -1) {\n            return;\n        }\n        const [startPos, endPos] = this.compare(other) < 0 ? [this, other] : [other, this];\n        if (startPos.index === endPos.index) {\n            callback(model.parts[this.index], startPos.offset, endPos.offset);\n        } else {\n            const firstPart = model.parts[startPos.index];\n            callback(firstPart, startPos.offset, firstPart.text.length);\n            for (let i = startPos.index + 1; i < endPos.index; ++i) {\n                const part = model.parts[i];\n                callback(part, 0, part.text.length);\n            }\n            const lastPart = model.parts[endPos.index];\n            callback(lastPart, 0, endPos.offset);\n        }\n    }\n\n    forwardsWhile(model: EditorModel, predicate: Predicate) {\n        if (this.index === -1) {\n            return this;\n        }\n\n        let {index, offset} = this;\n        const {parts} = model;\n        while (index < parts.length) {\n            const part = parts[index];\n            while (offset < part.text.length) {\n                if (!predicate(index, offset, part)) {\n                    return new DocumentPosition(index, offset);\n                }\n                offset += 1;\n            }\n            // end reached\n            if (index === (parts.length - 1)) {\n                return new DocumentPosition(index, offset);\n            } else {\n                index += 1;\n                offset = 0;\n            }\n        }\n    }\n\n    backwardsWhile(model: EditorModel, predicate: Predicate) {\n        if (this.index === -1) {\n            return this;\n        }\n\n        let {index, offset} = this;\n        const parts = model.parts;\n        while (index >= 0) {\n            const part = parts[index];\n            while (offset > 0) {\n                if (!predicate(index, offset - 1, part)) {\n                    return new DocumentPosition(index, offset);\n                }\n                offset -= 1;\n            }\n            // start reached\n            if (index === 0) {\n                return new DocumentPosition(index, offset);\n            } else {\n                index -= 1;\n                offset = parts[index].text.length;\n            }\n        }\n    }\n\n    asOffset(model: EditorModel) {\n        if (this.index === -1) {\n            return new DocumentOffset(0, true);\n        }\n        let offset = 0;\n        for (let i = 0; i < this.index; ++i) {\n            offset += model.parts[i].text.length;\n        }\n        offset += this.offset;\n        const lastPart = model.parts[this.index];\n        const atEnd = !lastPart || offset >= lastPart.text.length; // if no last part, we're at the end\n        return new DocumentOffset(offset, atEnd);\n    }\n\n    isAtEnd(model: EditorModel) {\n        if (model.parts.length === 0) {\n            return true;\n        }\n        const lastPartIdx = model.parts.length - 1;\n        const lastPart = model.parts[lastPartIdx];\n        return this.index === lastPartIdx && this.offset === lastPart.text.length;\n    }\n\n    isAtStart() {\n        return this.index === 0 && this.offset === 0;\n    }\n}\n"]}