matrix-react-sdk
Version:
SDK for matrix.org using React
143 lines (137 loc) • 17.5 kB
JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = exports.MAX_STEP_LENGTH = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
/*
Copyright 2024 New Vector Ltd.
Copyright 2019 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
const MAX_STEP_LENGTH = exports.MAX_STEP_LENGTH = 10;
class HistoryManager {
constructor() {
(0, _defineProperty2.default)(this, "stack", []);
(0, _defineProperty2.default)(this, "newlyTypedCharCount", 0);
(0, _defineProperty2.default)(this, "currentIndex", -1);
(0, _defineProperty2.default)(this, "changedSinceLastPush", false);
(0, _defineProperty2.default)(this, "lastCaret", void 0);
(0, _defineProperty2.default)(this, "nonWordBoundarySinceLastPush", false);
(0, _defineProperty2.default)(this, "addedSinceLastPush", false);
(0, _defineProperty2.default)(this, "removedSinceLastPush", false);
}
clear() {
this.stack = [];
this.newlyTypedCharCount = 0;
this.currentIndex = -1;
this.changedSinceLastPush = false;
this.lastCaret = undefined;
this.nonWordBoundarySinceLastPush = false;
this.addedSinceLastPush = false;
this.removedSinceLastPush = false;
}
shouldPush(inputType, diff) {
// right now we can only push a step after
// the input has been applied to the model,
// so we can't push the state before something happened.
// not ideal but changing this would be harder to fit cleanly into
// the editor model.
const isNonBulkInput = inputType === "insertText" || inputType === "deleteContentForward" || inputType === "deleteContentBackward";
if (diff && isNonBulkInput) {
if (diff.added) {
this.addedSinceLastPush = true;
}
if (diff.removed) {
this.removedSinceLastPush = true;
}
// as long as you've only been adding or removing since the last push
if (this.addedSinceLastPush !== this.removedSinceLastPush) {
// add steps by word boundary, up to MAX_STEP_LENGTH characters
const str = diff.added ? diff.added : diff.removed;
const isWordBoundary = str === " " || str === "\t" || str === "\n";
if (this.nonWordBoundarySinceLastPush && isWordBoundary) {
return true;
}
if (!isWordBoundary) {
this.nonWordBoundarySinceLastPush = true;
}
this.newlyTypedCharCount += str.length;
return this.newlyTypedCharCount > MAX_STEP_LENGTH;
} else {
// if starting to remove while adding before, or the opposite, push
return true;
}
} else {
// bulk input (paste, ...) should be pushed every time
return true;
}
}
pushState(model, caret) {
// remove all steps after current step
while (this.currentIndex < this.stack.length - 1) {
this.stack.pop();
}
const parts = model.serializeParts();
this.stack.push({
parts,
caret
});
this.currentIndex = this.stack.length - 1;
this.lastCaret = undefined;
this.changedSinceLastPush = false;
this.newlyTypedCharCount = 0;
this.nonWordBoundarySinceLastPush = false;
this.addedSinceLastPush = false;
this.removedSinceLastPush = false;
}
// needs to persist parts and caret position
tryPush(model, caret, inputType, diff) {
// ignore state restoration echos.
// these respect the inputType values of the input event,
// but are actually passed in from MessageEditor calling model.reset()
// in the keydown event handler.
if (inputType === "historyUndo" || inputType === "historyRedo") {
return false;
}
const shouldPush = this.shouldPush(inputType, diff);
if (shouldPush) {
this.pushState(model, caret);
} else {
this.lastCaret = caret;
this.changedSinceLastPush = true;
}
return shouldPush;
}
ensureLastChangesPushed(model) {
if (this.changedSinceLastPush && this.lastCaret) {
this.pushState(model, this.lastCaret);
}
}
canUndo() {
return this.currentIndex >= 1 || this.changedSinceLastPush;
}
canRedo() {
return this.currentIndex < this.stack.length - 1;
}
// returns state that should be applied to model
undo(model) {
if (this.canUndo()) {
this.ensureLastChangesPushed(model);
this.currentIndex -= 1;
return this.stack[this.currentIndex];
}
}
// returns state that should be applied to model
redo() {
if (this.canRedo()) {
this.changedSinceLastPush = false;
this.currentIndex += 1;
return this.stack[this.currentIndex];
}
}
}
exports.default = HistoryManager;
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1) {\n            this.stack.pop();\n        }\n        const parts = model.serializeParts();\n        this.stack.push({ parts, caret });\n        this.currentIndex = this.stack.length - 1;\n        this.lastCaret = undefined;\n        this.changedSinceLastPush = false;\n        this.newlyTypedCharCount = 0;\n        this.nonWordBoundarySinceLastPush = false;\n        this.addedSinceLastPush = false;\n        this.removedSinceLastPush = false;\n    }\n\n    // needs to persist parts and caret position\n    public tryPush(model: EditorModel, caret?: Caret, inputType?: string, diff?: IDiff): boolean {\n        // ignore state restoration echos.\n        // these respect the inputType values of the input event,\n        // but are actually passed in from MessageEditor calling model.reset()\n        // in the keydown event handler.\n        if (inputType === \"historyUndo\" || inputType === \"historyRedo\") {\n            return false;\n        }\n        const shouldPush = this.shouldPush(inputType, diff);\n        if (shouldPush) {\n            this.pushState(model, caret);\n        } else {\n            this.lastCaret = caret;\n            this.changedSinceLastPush = true;\n        }\n        return shouldPush;\n    }\n\n    public ensureLastChangesPushed(model: EditorModel): void {\n        if (this.changedSinceLastPush && this.lastCaret) {\n            this.pushState(model, this.lastCaret);\n        }\n    }\n\n    public canUndo(): boolean {\n        return this.currentIndex >= 1 || this.changedSinceLastPush;\n    }\n\n    public canRedo(): boolean {\n        return this.currentIndex < this.stack.length - 1;\n    }\n\n    // returns state that should be applied to model\n    public undo(model: EditorModel): IHistory | void {\n        if (this.canUndo()) {\n            this.ensureLastChangesPushed(model);\n            this.currentIndex -= 1;\n            return this.stack[this.currentIndex];\n        }\n    }\n\n    // returns state that should be applied to model\n    public redo(): IHistory | void {\n        if (this.canRedo()) {\n            this.changedSinceLastPush = false;\n            this.currentIndex += 1;\n            return this.stack[this.currentIndex];\n        }\n    }\n}\n"],"mappings":";;;;;;;;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;;AAYO,MAAMA,eAAe,GAAAC,OAAA,CAAAD,eAAA,GAAG,EAAE;AAElB,MAAME,cAAc,CAAC;EAAAC,YAAA;IAAA,IAAAC,gBAAA,CAAAC,OAAA,iBACJ,EAAE;IAAA,IAAAD,gBAAA,CAAAC,OAAA,+BACA,CAAC;IAAA,IAAAD,gBAAA,CAAAC,OAAA,wBACR,CAAC,CAAC;IAAA,IAAAD,gBAAA,CAAAC,OAAA,gCACM,KAAK;IAAA,IAAAD,gBAAA,CAAAC,OAAA;IAAA,IAAAD,gBAAA,CAAAC,OAAA,wCAEG,KAAK;IAAA,IAAAD,gBAAA,CAAAC,OAAA,8BACf,KAAK;IAAA,IAAAD,gBAAA,CAAAC,OAAA,gCACH,KAAK;EAAA;EAE7BC,KAAKA,CAAA,EAAS;IACjB,IAAI,CAACC,KAAK,GAAG,EAAE;IACf,IAAI,CAACC,mBAAmB,GAAG,CAAC;IAC5B,IAAI,CAACC,YAAY,GAAG,CAAC,CAAC;IACtB,IAAI,CAACC,oBAAoB,GAAG,KAAK;IACjC,IAAI,CAACC,SAAS,GAAGC,SAAS;IAC1B,IAAI,CAACC,4BAA4B,GAAG,KAAK;IACzC,IAAI,CAACC,kBAAkB,GAAG,KAAK;IAC/B,IAAI,CAACC,oBAAoB,GAAG,KAAK;EACrC;EAEQC,UAAUA,CAACC,SAAkB,EAAEC,IAAY,EAAW;IAC1D;IACA;IACA;IACA;IACA;IACA,MAAMC,cAAc,GAChBF,SAAS,KAAK,YAAY,IAAIA,SAAS,KAAK,sBAAsB,IAAIA,SAAS,KAAK,uBAAuB;IAC/G,IAAIC,IAAI,IAAIC,cAAc,EAAE;MACxB,IAAID,IAAI,CAACE,KAAK,EAAE;QACZ,IAAI,CAACN,kBAAkB,GAAG,IAAI;MAClC;MACA,IAAII,IAAI,CAACG,OAAO,EAAE;QACd,IAAI,CAACN,oBAAoB,GAAG,IAAI;MACpC;MACA;MACA,IAAI,IAAI,CAACD,kBAAkB,KAAK,IAAI,CAACC,oBAAoB,EAAE;QACvD;QACA,MAAMO,GAAG,GAAGJ,IAAI,CAACE,KAAK,GAAGF,IAAI,CAACE,KAAK,GAAGF,IAAI,CAACG,OAAQ;QACnD,MAAME,cAAc,GAAGD,GAAG,KAAK,GAAG,IAAIA,GAAG,KAAK,IAAI,IAAIA,GAAG,KAAK,IAAI;QAClE,IAAI,IAAI,CAACT,4BAA4B,IAAIU,cAAc,EAAE;UACrD,OAAO,IAAI;QACf;QACA,IAAI,CAACA,cAAc,EAAE;UACjB,IAAI,CAACV,4BAA4B,GAAG,IAAI;QAC5C;QACA,IAAI,CAACL,mBAAmB,IAAIc,GAAG,CAACE,MAAM;QACtC,OAAO,IAAI,CAAChB,mBAAmB,GAAGR,eAAe;MACrD,CAAC,MAAM;QACH;QACA,OAAO,IAAI;MACf;IACJ,CAAC,MAAM;MACH;MACA,OAAO,IAAI;IACf;EACJ;EAEQyB,SAASA,CAACC,KAAkB,EAAEC,KAAa,EAAQ;IACvD;IACA,OAAO,IAAI,CAAClB,YAAY,GAAG,IAAI,CAACF,KAAK,CAACiB,MAAM,GAAG,CAAC,EAAE;MAC9C,IAAI,CAACjB,KAAK,CAACqB,GAAG,CAAC,CAAC;IACpB;IACA,MAAMC,KAAK,GAAGH,KAAK,CAACI,cAAc,CAAC,CAAC;IACpC,IAAI,CAACvB,KAAK,CAACwB,IAAI,CAAC;MAAEF,KAAK;MAAEF;IAAM,CAAC,CAAC;IACjC,IAAI,CAAClB,YAAY,GAAG,IAAI,CAACF,KAAK,CAACiB,MAAM,GAAG,CAAC;IACzC,IAAI,CAACb,SAAS,GAAGC,SAAS;IAC1B,IAAI,CAACF,oBAAoB,GAAG,KAAK;IACjC,IAAI,CAACF,mBAAmB,GAAG,CAAC;IAC5B,IAAI,CAACK,4BAA4B,GAAG,KAAK;IACzC,IAAI,CAACC,kBAAkB,GAAG,KAAK;IAC/B,IAAI,CAACC,oBAAoB,GAAG,KAAK;EACrC;;EAEA;EACOiB,OAAOA,CAACN,KAAkB,EAAEC,KAAa,EAAEV,SAAkB,EAAEC,IAAY,EAAW;IACzF;IACA;IACA;IACA;IACA,IAAID,SAAS,KAAK,aAAa,IAAIA,SAAS,KAAK,aAAa,EAAE;MAC5D,OAAO,KAAK;IAChB;IACA,MAAMD,UAAU,GAAG,IAAI,CAACA,UAAU,CAACC,SAAS,EAAEC,IAAI,CAAC;IACnD,IAAIF,UAAU,EAAE;MACZ,IAAI,CAACS,SAAS,CAACC,KAAK,EAAEC,KAAK,CAAC;IAChC,CAAC,MAAM;MACH,IAAI,CAAChB,SAAS,GAAGgB,KAAK;MACtB,IAAI,CAACjB,oBAAoB,GAAG,IAAI;IACpC;IACA,OAAOM,UAAU;EACrB;EAEOiB,uBAAuBA,CAACP,KAAkB,EAAQ;IACrD,IAAI,IAAI,CAAChB,oBAAoB,IAAI,IAAI,CAACC,SAAS,EAAE;MAC7C,IAAI,CAACc,SAAS,CAACC,KAAK,EAAE,IAAI,CAACf,SAAS,CAAC;IACzC;EACJ;EAEOuB,OAAOA,CAAA,EAAY;IACtB,OAAO,IAAI,CAACzB,YAAY,IAAI,CAAC,IAAI,IAAI,CAACC,oBAAoB;EAC9D;EAEOyB,OAAOA,CAAA,EAAY;IACtB,OAAO,IAAI,CAAC1B,YAAY,GAAG,IAAI,CAACF,KAAK,CAACiB,MAAM,GAAG,CAAC;EACpD;;EAEA;EACOY,IAAIA,CAACV,KAAkB,EAAmB;IAC7C,IAAI,IAAI,CAACQ,OAAO,CAAC,CAAC,EAAE;MAChB,IAAI,CAACD,uBAAuB,CAACP,KAAK,CAAC;MACnC,IAAI,CAACjB,YAAY,IAAI,CAAC;MACtB,OAAO,IAAI,CAACF,KAAK,CAAC,IAAI,CAACE,YAAY,CAAC;IACxC;EACJ;;EAEA;EACO4B,IAAIA,CAAA,EAAoB;IAC3B,IAAI,IAAI,CAACF,OAAO,CAAC,CAAC,EAAE;MAChB,IAAI,CAACzB,oBAAoB,GAAG,KAAK;MACjC,IAAI,CAACD,YAAY,IAAI,CAAC;MACtB,OAAO,IAAI,CAACF,KAAK,CAAC,IAAI,CAACE,YAAY,CAAC;IACxC;EACJ;AACJ;AAACR,OAAA,CAAAI,OAAA,GAAAH,cAAA","ignoreList":[]}