overleaf/services/web/frontend/js/vendor/libs/sharejs.js

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import { generateSHA1Hash } from '../../shared/utils/sha1'
import { debugging, debugConsole } from '@/utils/debugging'
import getMeta from '@/utils/meta'
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
/* eslint-disable
camelcase,
max-len,
no-class-assign,
no-return-assign,
no-undef,
no-unused-vars,
no-use-before-define,
standard/object-curly-even-spacing,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
* decaffeinate suggestions:
* DS101: Remove unnecessary use of Array.from
* DS102: Remove unnecessary code created because of implicit returns
* DS205: Consider reworking code to avoid use of IIFEs
* DS207: Consider shorter variations of null checks
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
*/
export const { Doc } = (() => {
var append = void 0,
bootstrapTransform = void 0,
exports = void 0,
transformComponent = void 0;
var WEB = true;
window.sharejs = exports = {};
var types = exports.types = {};
// These methods let you build a transform function from a transformComponent function
// for OT types like text and JSON in which operations are lists of components
// and transforming them requires N^2 work.
// Add transform and transformX functions for an OT type which has transformComponent defined.
// transformComponent(destination array, component, other component, side)
exports['_bt'] = bootstrapTransform = function bootstrapTransform(type, transformComponent, checkValidOp, append) {
var _transformX = void 0;
var transformComponentX = function transformComponentX(left, right, destLeft, destRight) {
transformComponent(destLeft, left, right, 'left');
return transformComponent(destRight, right, left, 'right');
};
// Transforms rightOp by leftOp. Returns ['rightOp', clientOp']
type.transformX = type['transformX'] = _transformX = function transformX(leftOp, rightOp) {
checkValidOp(leftOp);
checkValidOp(rightOp);
var newRightOp = [];
var _iteratorNormalCompletion = true;
var _didIteratorError = false;
var _iteratorError = undefined;
try {
for (var _iterator = Array.from(rightOp)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
var rightComponent = _step.value;
// Generate newLeftOp by composing leftOp by rightComponent
var newLeftOp = [];
var k = 0;
while (k < leftOp.length) {
var l;
var nextC = [];
transformComponentX(leftOp[k], rightComponent, newLeftOp, nextC);
k++;
if (nextC.length === 1) {
rightComponent = nextC[0];
} else if (nextC.length === 0) {
var _iteratorNormalCompletion2 = true;
var _didIteratorError2 = false;
var _iteratorError2 = undefined;
try {
for (var _iterator2 = Array.from(leftOp.slice(k))[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
l = _step2.value;
append(newLeftOp, l);
}
} catch (err) {
_didIteratorError2 = true;
_iteratorError2 = err;
} finally {
try {
if (!_iteratorNormalCompletion2 && _iterator2.return) {
_iterator2.return();
}
} finally {
if (_didIteratorError2) {
throw _iteratorError2;
}
}
}
rightComponent = null;
break;
} else {
// Recurse.
var _Array$from = Array.from(_transformX(leftOp.slice(k), nextC)),
_Array$from2 = _slicedToArray(_Array$from, 2),
l_ = _Array$from2[0],
r_ = _Array$from2[1];
var _iteratorNormalCompletion3 = true;
var _didIteratorError3 = false;
var _iteratorError3 = undefined;
try {
for (var _iterator3 = Array.from(l_)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
l = _step3.value;
append(newLeftOp, l);
}
} catch (err) {
_didIteratorError3 = true;
_iteratorError3 = err;
} finally {
try {
if (!_iteratorNormalCompletion3 && _iterator3.return) {
_iterator3.return();
}
} finally {
if (_didIteratorError3) {
throw _iteratorError3;
}
}
}
var _iteratorNormalCompletion4 = true;
var _didIteratorError4 = false;
var _iteratorError4 = undefined;
try {
for (var _iterator4 = Array.from(r_)[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
var r = _step4.value;
append(newRightOp, r);
}
} catch (err) {
_didIteratorError4 = true;
_iteratorError4 = err;
} finally {
try {
if (!_iteratorNormalCompletion4 && _iterator4.return) {
_iterator4.return();
}
} finally {
if (_didIteratorError4) {
throw _iteratorError4;
}
}
}
rightComponent = null;
break;
}
}
if (rightComponent != null) {
append(newRightOp, rightComponent);
}
leftOp = newLeftOp;
}
} catch (err) {
_didIteratorError = true;
_iteratorError = err;
} finally {
try {
if (!_iteratorNormalCompletion && _iterator.return) {
_iterator.return();
}
} finally {
if (_didIteratorError) {
throw _iteratorError;
}
}
}
return [leftOp, newRightOp];
};
// Transforms op with specified type ('left' or 'right') by otherOp.
return type.transform = type['transform'] = function (op, otherOp, type) {
var _ = void 0;
if (type !== 'left' && type !== 'right') {
throw new Error("type must be 'left' or 'right'");
}
if (otherOp.length === 0) {
return op;
}
// TODO: Benchmark with and without this line. I _think_ it'll make a big difference...?
if (op.length === 1 && otherOp.length === 1) {
return transformComponent([], op[0], otherOp[0], type);
}
if (type === 'left') {
var left = void 0;
var _Array$from3 = Array.from(_transformX(op, otherOp));
var _Array$from4 = _slicedToArray(_Array$from3, 2);
left = _Array$from4[0];
_ = _Array$from4[1];
return left;
} else {
var right = void 0;
var _Array$from5 = Array.from(_transformX(otherOp, op));
var _Array$from6 = _slicedToArray(_Array$from5, 2);
_ = _Array$from6[0];
right = _Array$from6[1];
return right;
}
};
};
// A simple text implementation
//
// Operations are lists of components.
// Each component either inserts or deletes at a specified position in the document.
//
// Components are either:
// {i:'str', p:100}: Insert 'str' at position 100 in the document
// {d:'str', p:100}: Delete 'str' at position 100 in the document
//
// Components in an operation are executed sequentially, so the position of components
// assumes previous components have already executed.
//
// Eg: This op:
// [{i:'abc', p:0}]
// is equivalent to this op:
// [{i:'a', p:0}, {i:'b', p:1}, {i:'c', p:2}]
// NOTE: The global scope here is shared with other sharejs files when built with closure.
// Be careful what ends up in your namespace.
var text = {};
text.name = 'text';
text.create = function () {
return '';
};
var strInject = function strInject(s1, pos, s2) {
return s1.slice(0, pos) + s2 + s1.slice(pos);
};
var checkValidComponent = function checkValidComponent(c) {
if (typeof c.p !== 'number') {
throw new Error('component missing position field');
}
var i_type = _typeof(c.i);
var d_type = _typeof(c.d);
var c_type = _typeof(c.c);
if (!(i_type === 'string' ^ d_type === 'string' ^ c_type === 'string')) {
throw new Error('component needs an i, d or c field');
}
if (!(c.p >= 0)) {
throw new Error('position cannot be negative');
}
};
var checkValidOp = function checkValidOp(op) {
var _iteratorNormalCompletion5 = true;
var _didIteratorError5 = false;
var _iteratorError5 = undefined;
try {
for (var _iterator5 = Array.from(op)[Symbol.iterator](), _step5; !(_iteratorNormalCompletion5 = (_step5 = _iterator5.next()).done); _iteratorNormalCompletion5 = true) {
var c = _step5.value;
checkValidComponent(c);
}
} catch (err) {
_didIteratorError5 = true;
_iteratorError5 = err;
} finally {
try {
if (!_iteratorNormalCompletion5 && _iterator5.return) {
_iterator5.return();
}
} finally {
if (_didIteratorError5) {
throw _iteratorError5;
}
}
}
return true;
};
text.apply = function (snapshot, op) {
checkValidOp(op);
var _iteratorNormalCompletion6 = true;
var _didIteratorError6 = false;
var _iteratorError6 = undefined;
try {
for (var _iterator6 = Array.from(op)[Symbol.iterator](), _step6; !(_iteratorNormalCompletion6 = (_step6 = _iterator6.next()).done); _iteratorNormalCompletion6 = true) {
var component = _step6.value;
if (component.i != null) {
snapshot = strInject(snapshot, component.p, component.i);
} else if (component.d != null) {
var deleted = snapshot.slice(component.p, component.p + component.d.length);
if (component.d !== deleted) {
throw new Error('Delete component \'' + component.d + '\' does not match deleted text \'' + deleted + '\'');
}
snapshot = snapshot.slice(0, component.p) + snapshot.slice(component.p + component.d.length);
} else if (component.c != null) {
var comment = snapshot.slice(component.p, component.p + component.c.length);
if (component.c !== comment) {
throw new Error('Comment component \'' + component.c + '\' does not match commented text \'' + comment + '\'');
}
} else {
throw new Error('Unknown op type');
}
}
} catch (err) {
_didIteratorError6 = true;
_iteratorError6 = err;
} finally {
try {
if (!_iteratorNormalCompletion6 && _iterator6.return) {
_iterator6.return();
}
} finally {
if (_didIteratorError6) {
throw _iteratorError6;
}
}
}
return snapshot;
};
var cloneAndModify = function cloneAndModify(op, modifications) {
var v = void 0;
var newOp = {};
for (var k in op) {
v = op[k];
newOp[k] = v;
}
for (k in modifications) {
v = modifications[k];
newOp[k] = v;
}
return newOp;
};
// Exported for use by the random op generator.
//
// For simplicity, this version of append does not compress adjacent inserts and deletes of
// the same text. It would be nice to change that at some stage.
text._append = append = function append(newOp, c) {
if (c.i === '' || c.d === '') {
return;
}
if (newOp.length === 0) {
return newOp.push(c);
} else {
var last = newOp[newOp.length - 1];
// Compose the insert into the previous insert if possible
if (last.i != null && c.i != null && last.p <= c.p && c.p <= last.p + last.i.length && last.u === c.u) {
return newOp[newOp.length - 1] = cloneAndModify(last, { i: strInject(last.i, c.p - last.p, c.i) });
} else if (last.d != null && c.d != null && c.p <= last.p && last.p <= c.p + c.d.length && last.u === c.u) {
return newOp[newOp.length - 1] = cloneAndModify(last, { d: strInject(c.d, last.p - c.p, last.d), p: c.p });
} else {
return newOp.push(c);
}
}
};
text.compose = function (op1, op2) {
checkValidOp(op1);
checkValidOp(op2);
var newOp = op1.slice();
var _iteratorNormalCompletion7 = true;
var _didIteratorError7 = false;
var _iteratorError7 = undefined;
try {
for (var _iterator7 = Array.from(op2)[Symbol.iterator](), _step7; !(_iteratorNormalCompletion7 = (_step7 = _iterator7.next()).done); _iteratorNormalCompletion7 = true) {
var c = _step7.value;
append(newOp, c);
}
} catch (err) {
_didIteratorError7 = true;
_iteratorError7 = err;
} finally {
try {
if (!_iteratorNormalCompletion7 && _iterator7.return) {
_iterator7.return();
}
} finally {
if (_didIteratorError7) {
throw _iteratorError7;
}
}
}
return newOp;
};
// Attempt to compress the op components together 'as much as possible'.
// This implementation preserves order and preserves create/delete pairs.
text.compress = function (op) {
return text.compose([], op);
};
text.normalize = function (op) {
var newOp = [];
// Normalize should allow ops which are a single (unwrapped) component:
// {i:'asdf', p:23}.
// There's no good way to test if something is an array:
// http://perfectionkills.com/instanceof-considered-harmful-or-how-to-write-a-robust-isarray/
// so this is probably the least bad solution.
if (op.i != null || op.p != null) {
op = [op];
}
var _iteratorNormalCompletion8 = true;
var _didIteratorError8 = false;
var _iteratorError8 = undefined;
try {
for (var _iterator8 = Array.from(op)[Symbol.iterator](), _step8; !(_iteratorNormalCompletion8 = (_step8 = _iterator8.next()).done); _iteratorNormalCompletion8 = true) {
var c = _step8.value;
if (c.p == null) {
c.p = 0;
}
append(newOp, c);
}
} catch (err) {
_didIteratorError8 = true;
_iteratorError8 = err;
} finally {
try {
if (!_iteratorNormalCompletion8 && _iterator8.return) {
_iterator8.return();
}
} finally {
if (_didIteratorError8) {
throw _iteratorError8;
}
}
}
return newOp;
};
// This helper method transforms a position by an op component.
//
// If c is an insert, insertAfter specifies whether the transform
// is pushed after the insert (true) or before it (false).
//
// insertAfter is optional for deletes.
var transformPosition = function transformPosition(pos, c, insertAfter) {
if (c.i != null) {
if (c.p < pos || c.p === pos && insertAfter) {
return pos + c.i.length;
} else {
return pos;
}
} else if (c.d != null) {
// I think this could also be written as: Math.min(c.p, Math.min(c.p - otherC.p, otherC.d.length))
// but I think its harder to read that way, and it compiles using ternary operators anyway
// so its no slower written like this.
if (pos <= c.p) {
return pos;
} else if (pos <= c.p + c.d.length) {
return c.p;
} else {
return pos - c.d.length;
}
} else if (c.c != null) {
return pos;
} else {
throw new Error('unknown op type');
}
};
// Helper method to transform a cursor position as a result of an op.
//
// Like transformPosition above, if c is an insert, insertAfter specifies whether the cursor position
// is pushed after an insert (true) or before it (false).
text.transformCursor = function (position, op, side) {
var insertAfter = side === 'right';
var _iteratorNormalCompletion9 = true;
var _didIteratorError9 = false;
var _iteratorError9 = undefined;
try {
for (var _iterator9 = Array.from(op)[Symbol.iterator](), _step9; !(_iteratorNormalCompletion9 = (_step9 = _iterator9.next()).done); _iteratorNormalCompletion9 = true) {
var c = _step9.value;
position = transformPosition(position, c, insertAfter);
}
} catch (err) {
_didIteratorError9 = true;
_iteratorError9 = err;
} finally {
try {
if (!_iteratorNormalCompletion9 && _iterator9.return) {
_iterator9.return();
}
} finally {
if (_didIteratorError9) {
throw _iteratorError9;
}
}
}
return position;
};
// Transform an op component by another op component. Asymmetric.
// The result will be appended to destination.
//
// exported for use in JSON type
text._tc = transformComponent = function transformComponent(dest, c, otherC, side) {
var cIntersect = void 0,
intersectEnd = void 0,
intersectStart = void 0,
newC = void 0,
otherIntersect = void 0;
checkValidOp([c]);
checkValidOp([otherC]);
if (c.i != null) {
append(dest, cloneAndModify(c, { p: transformPosition(c.p, otherC, side === 'right') }));
} else if (c.d != null) {
// Delete
if (otherC.i != null) {
// delete vs insert
var s = c.d;
if (c.p < otherC.p) {
append(dest, cloneAndModify(c, { d: s.slice(0, otherC.p - c.p) }));
s = s.slice(otherC.p - c.p);
}
if (s !== '') {
append(dest, cloneAndModify(c, { d: s, p: c.p + otherC.i.length }));
}
} else if (otherC.d != null) {
// Delete vs delete
if (c.p >= otherC.p + otherC.d.length) {
append(dest, cloneAndModify(c, { p: c.p - otherC.d.length }));
} else if (c.p + c.d.length <= otherC.p) {
append(dest, c);
} else {
// They overlap somewhere.
newC = cloneAndModify(c, { d: '' });
if (c.p < otherC.p) {
newC.d = c.d.slice(0, otherC.p - c.p);
}
if (c.p + c.d.length > otherC.p + otherC.d.length) {
newC.d += c.d.slice(otherC.p + otherC.d.length - c.p);
}
// This is entirely optional - just for a check that the deleted
// text in the two ops matches
intersectStart = Math.max(c.p, otherC.p);
intersectEnd = Math.min(c.p + c.d.length, otherC.p + otherC.d.length);
cIntersect = c.d.slice(intersectStart - c.p, intersectEnd - c.p);
otherIntersect = otherC.d.slice(intersectStart - otherC.p, intersectEnd - otherC.p);
if (cIntersect !== otherIntersect) {
throw new Error('Delete ops delete different text in the same region of the document');
}
if (newC.d !== '') {
// This could be rewritten similarly to insert v delete, above.
newC.p = transformPosition(newC.p, otherC);
append(dest, newC);
}
}
} else if (otherC.c != null) {
append(dest, c);
} else {
throw new Error('unknown op type');
}
} else if (c.c != null) {
// Comment
if (otherC.i != null) {
if (c.p < otherC.p && otherC.p < c.p + c.c.length) {
var offset = otherC.p - c.p;
var new_c = c.c.slice(0, +(offset - 1) + 1 || undefined) + otherC.i + c.c.slice(offset);
append(dest, cloneAndModify(c, { c: new_c }));
} else {
append(dest, cloneAndModify(c, { p: transformPosition(c.p, otherC, true) }));
}
} else if (otherC.d != null) {
if (c.p >= otherC.p + otherC.d.length) {
append(dest, cloneAndModify(c, { p: c.p - otherC.d.length }));
} else if (c.p + c.c.length <= otherC.p) {
append(dest, c);
} else {
// Delete overlaps comment
// They overlap somewhere.
newC = cloneAndModify(c, { c: '' });
if (c.p < otherC.p) {
newC.c = c.c.slice(0, otherC.p - c.p);
}
if (c.p + c.c.length > otherC.p + otherC.d.length) {
newC.c += c.c.slice(otherC.p + otherC.d.length - c.p);
}
// This is entirely optional - just for a check that the deleted
// text in the two ops matches
intersectStart = Math.max(c.p, otherC.p);
intersectEnd = Math.min(c.p + c.c.length, otherC.p + otherC.d.length);
cIntersect = c.c.slice(intersectStart - c.p, intersectEnd - c.p);
otherIntersect = otherC.d.slice(intersectStart - otherC.p, intersectEnd - otherC.p);
if (cIntersect !== otherIntersect) {
throw new Error('Delete ops delete different text in the same region of the document');
}
newC.p = transformPosition(newC.p, otherC);
append(dest, newC);
}
} else if (otherC.c != null) {
append(dest, c);
} else {
throw new Error('unknown op type');
}
}
return dest;
};
var invertComponent = function invertComponent(c) {
if (c.i != null) {
return { d: c.i, p: c.p };
} else {
return { i: c.d, p: c.p };
}
};
// No need to use append for invert, because the components won't be able to
// cancel with one another.
text.invert = function (op) {
return Array.from(op.slice().reverse()).map(function (c) {
return invertComponent(c);
});
};
if (WEB != null) {
if (!exports.types) {
exports.types = {};
}
// This is kind of awful - come up with a better way to hook this helper code up.
bootstrapTransform(text, transformComponent, checkValidOp, append);
// [] is used to prevent closure from renaming types.text
exports.types.text = text;
}
// Text document API for text
text.api = {
provides: { text: true },
// The number of characters in the string
getLength: function getLength() {
return this.snapshot.length;
},
// Get the text contents of a document
getText: function getText() {
return this.snapshot;
},
insert: function insert(pos, text, fromUndo, callback) {
var op = { p: pos, i: text };
if (fromUndo) {
op.u = true;
}
op = [op];
this.submitOp(op, callback);
return op;
},
del: function del(pos, length, fromUndo, callback) {
var op = { p: pos, d: this.snapshot.slice(pos, pos + length) };
if (fromUndo) {
op.u = true;
}
op = [op];
this.submitOp(op, callback);
return op;
},
_register: function _register() {
return this.on('remoteop', function (op) {
var _this = this;
return function () {
var result = [];
var _iteratorNormalCompletion10 = true;
var _didIteratorError10 = false;
var _iteratorError10 = undefined;
try {
for (var _iterator10 = Array.from(op)[Symbol.iterator](), _step10; !(_iteratorNormalCompletion10 = (_step10 = _iterator10.next()).done); _iteratorNormalCompletion10 = true) {
var component = _step10.value;
if (component.i !== undefined) {
result.push(_this.emit('insert', component.p, component.i));
} else if (component.d !== undefined) {
result.push(_this.emit('delete', component.p, component.d));
} else {
result.push(undefined);
}
}
} catch (err) {
_didIteratorError10 = true;
_iteratorError10 = err;
} finally {
try {
if (!_iteratorNormalCompletion10 && _iterator10.return) {
_iterator10.return();
}
} finally {
if (_didIteratorError10) {
throw _iteratorError10;
}
}
}
return result;
}();
});
}
};
// This is a simple port of microevent.js to Coffeescript. I've changed the
// function names to be consistent with node.js EventEmitter.
//
// microevent.js is copyright Jerome Etienne, and licensed under the MIT license:
// https://github.com/jeromeetienne/microevent.js
var nextTick = WEB != null ? function (fn) {
return setTimeout(fn, 0);
} : process['nextTick'];
var MicroEvent = function () {
function MicroEvent() {
_classCallCheck(this, MicroEvent);
}
_createClass(MicroEvent, [{
key: 'on',
value: function on(event, fct) {
if (!this._events) {
this._events = {};
}
if (!this._events[event]) {
this._events[event] = [];
}
this._events[event].push(fct);
return this;
}
}, {
key: 'removeListener',
value: function removeListener(event, fct) {
var _this2 = this;
if (!this._events) {
this._events = {};
}
var listeners = this._events[event] || (this._events[event] = []);
// Sadly, there's no IE8- support for indexOf.
var i = 0;
while (i < listeners.length) {
if (listeners[i] === fct) {
listeners[i] = undefined;
}
i++;
}
nextTick(function () {
return _this2._events[event] = Array.from(_this2._events[event]).filter(function (x) {
return x;
});
});
return this;
}
}, {
key: 'emit',
value: function emit(event) {
if (!(this._events != null ? this._events[event] : undefined)) {
return this;
}
for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
args[_key - 1] = arguments[_key];
}
var _iteratorNormalCompletion11 = true;
var _didIteratorError11 = false;
var _iteratorError11 = undefined;
try {
for (var _iterator11 = Array.from(this._events[event])[Symbol.iterator](), _step11; !(_iteratorNormalCompletion11 = (_step11 = _iterator11.next()).done); _iteratorNormalCompletion11 = true) {
var fn = _step11.value;
if (fn) {
fn.apply(this, args);
}
}
} catch (err) {
_didIteratorError11 = true;
_iteratorError11 = err;
} finally {
try {
if (!_iteratorNormalCompletion11 && _iterator11.return) {
_iterator11.return();
}
} finally {
if (_didIteratorError11) {
throw _iteratorError11;
}
}
}
return this;
}
}]);
return MicroEvent;
}();
// mixin will delegate all MicroEvent.js function in the destination object
MicroEvent.mixin = function (obj) {
var proto = obj.prototype || obj;
// Damn closure compiler :/
proto.on = MicroEvent.prototype.on;
proto.removeListener = MicroEvent.prototype.removeListener;
proto.emit = MicroEvent.prototype.emit;
return obj;
};
if (WEB == null) {
module.exports = MicroEvent;
}
if (WEB != null) {
exports.extendDoc = function (name, fn) {
return Doc.prototype[name] = fn;
};
}
// A Doc is a client's view on a sharejs document.
//
// Documents are created by calling Connection.open().
//
// Documents are event emitters - use doc.on(eventname, fn) to subscribe.
//
// Documents get mixed in with their type's API methods. So, you can .insert('foo', 0) into
// a text document and stuff like that.
//
// Events:
// - remoteop (op)
// - changed (op)
// - acknowledge (op)
// - error
// - open, closing, closed. 'closing' is not guaranteed to fire before closed.
var Doc = function () {
// connection is a Connection object.
// name is the documents' docName.
// data can optionally contain known document data, and initial open() call arguments:
// {v[erson], snapshot={...}, type, create=true/false/undefined}
// callback will be called once the document is first opened.
function Doc(connection, name, openData) {
_classCallCheck(this, Doc);
// Any of these can be null / undefined at this stage.
this.flush = this.flush.bind(this);
this.setFlushDelay = this.setFlushDelay.bind(this);
this.shout = this.shout.bind(this);
this.connection = connection;
this.name = name;
if (!openData) {
openData = {};
}
this.version = openData.v;
this.snapshot = openData.snaphot;
if (openData.type) {
this._setType(openData.type);
}
this.state = 'closed';
this.autoOpen = false;
// Has the document already been created?
this._create = openData.create;
// The op that is currently roundtripping to the server, or null.
//
// When the connection reconnects, the inflight op is resubmitted.
this.inflightOp = null;
this.inflightCallbacks = [];
// The auth ids which the client has previously used to attempt to send inflightOp. This is
// usually empty.
this.inflightSubmittedIds = [];
// All ops that are waiting for the server to acknowledge @inflightOp
this.pendingOp = null;
this.pendingCallbacks = [];
}
// Transform a server op by a client op, and vice versa.
_createClass(Doc, [{
key: '_xf',
value: function _xf(client, server) {
if (this.type.transformX) {
return this.type.transformX(client, server);
} else {
var client_ = this.type.transform(client, server, 'left');
var server_ = this.type.transform(server, client, 'right');
return [client_, server_];
}
}
}, {
key: '_otApply',
value: function _otApply(docOp, isRemote, msg) {
var oldSnapshot = this.snapshot;
this.snapshot = this.type.apply(this.snapshot, docOp);
// Its important that these event handlers are called with oldSnapshot.
// The reason is that the OT type APIs might need to access the snapshots to
// determine information about the received op.
this.emit('change', docOp, oldSnapshot, msg);
if (isRemote) {
return this.emit('remoteop', docOp, oldSnapshot, msg);
}
}
}, {
key: '_connectionStateChanged',
value: function _connectionStateChanged(state, data) {
switch (state) {
case 'disconnected':
this.state = 'closed';
// This is used by the server to make sure that when an op is resubmitted it
// doesn't end up getting applied twice.
if (this.inflightOp) {
this.inflightSubmittedIds.push(this.connection.id);
}
this.emit('closed');
break;
case 'ok':
// Might be able to do this when we're connecting... that would save a roundtrip.
if (this.autoOpen) {
this.open();
}
break;
case 'stopped':
if (typeof this._openCallback === 'function') {
this._openCallback(data);
}
break;
}
return this.emit(state, data);
}
}, {
key: '_setType',
value: function _setType(type) {
if (typeof type === 'string') {
type = types[type];
}
if (!type || !type.compose) {
throw new Error('Support for types without compose() is not implemented');
}
this.type = type;
if (type.api) {
for (var k in type.api) {
var v = type.api[k];this[k] = v;
}
return typeof this._register === 'function' ? this._register() : undefined;
} else {
return this.provides = {};
}
}
}, {
key: '_onMessage',
value: function _onMessage(msg) {
// debugConsole.warn('s->c', msg)
if (msg.open === true) {
// The document has been successfully opened.
this.state = 'open';
this._create = false; // Don't try and create the document again next time open() is called.
if (this.created == null) {
this.created = !!msg.create;
}
if (msg.type) {
this._setType(msg.type);
}
if (msg.create) {
this.created = true;
this.snapshot = this.type.create();
} else {
if (this.created !== true) {
this.created = false;
}
if (msg.snapshot !== undefined) {
this.snapshot = msg.snapshot;
}
}
if (msg.v != null) {
this.version = msg.v;
}
// Resend any previously queued operation.
if (this.inflightOp) {
var response = {
doc: this.name,
op: this.inflightOp,
v: this.version
};
if (this.inflightSubmittedIds.length) {
response.dupIfSource = this.inflightSubmittedIds;
}
this.connection.send(response);
} else {
this.flush();
}
this.emit('open');
return typeof this._openCallback === 'function' ? this._openCallback(null) : undefined;
} else if (msg.open === false) {
// The document has either been closed, or an open request has failed.
if (msg.error) {
// An error occurred opening the document.
debugConsole.error('Could not open document: ' + msg.error);
this.emit('error', msg.error);
if (typeof this._openCallback === 'function') {
this._openCallback(msg.error);
}
}
this.state = 'closed';
this.emit('closed');
if (typeof this._closeCallback === 'function') {
this._closeCallback();
}
return this._closeCallback = null;
} else if (msg.op === null && error === 'Op already submitted') {
// We've tried to resend an op to the server, which has already been received successfully. Do nothing.
// The op will be confirmed normally when we get the op itself was echoed back from the server
// (handled below).
} else if (msg.op === undefined && msg.v !== undefined || msg.op && Array.from(this.inflightSubmittedIds).includes(msg.meta.source)) {
// Our inflight op has been acknowledged.
var callback = void 0;
var oldInflightOp = this.inflightOp;
this.inflightOp = null;
this.inflightSubmittedIds.length = 0;
if (this.pendingOp === null) {
// All ops are acked
this.emit('saved');
}
var error = msg.error;
if (error) {
// The server has rejected an op from the client for some reason.
// We'll send the error message to the user and roll back the change.
//
// If the server isn't going to allow edits anyway, we should probably
// figure out some way to flag that (readonly:true in the open request?)
if (this.type.invert) {
var undo = this.type.invert(oldInflightOp);
// Now we have to transform the undo operation by any server ops & pending ops
if (this.pendingOp) {
var _Array$from7 = Array.from(this._xf(this.pendingOp, undo));
var _Array$from8 = _slicedToArray(_Array$from7, 2);
this.pendingOp = _Array$from8[0];
undo = _Array$from8[1];
}
// ... and apply it locally, reverting the changes.
//
// This call will also call @emit 'remoteop'. I'm still not 100% sure about this
// functionality, because its really a local op. Basically, the problem is that
// if the client's op is rejected by the server, the editor window should update
// to reflect the undo.
this._otApply(undo, true, msg);
} else {
this.emit('error', 'Op apply failed (' + error + ') and the op could not be reverted');
}
var _iteratorNormalCompletion12 = true;
var _didIteratorError12 = false;
var _iteratorError12 = undefined;
try {
for (var _iterator12 = Array.from(this.inflightCallbacks)[Symbol.iterator](), _step12; !(_iteratorNormalCompletion12 = (_step12 = _iterator12.next()).done); _iteratorNormalCompletion12 = true) {
callback = _step12.value;
callback(error);
}
} catch (err) {
_didIteratorError12 = true;
_iteratorError12 = err;
} finally {
try {
if (!_iteratorNormalCompletion12 && _iterator12.return) {
_iterator12.return();
}
} finally {
if (_didIteratorError12) {
throw _iteratorError12;
}
}
}
} else {
// The op applied successfully.
// We may get multiple acks of the same message if we retried it,
// so its ok if we receive an ack for a version that we've already gone past.
// If so, just ignore it
if (msg.v < this.version) {
return;
}
if (msg.v !== this.version) {
throw new Error('Invalid version from server');
}
this.version++;
this.emit('acknowledge', oldInflightOp);
var _iteratorNormalCompletion13 = true;
var _didIteratorError13 = false;
var _iteratorError13 = undefined;
try {
for (var _iterator13 = Array.from(this.inflightCallbacks)[Symbol.iterator](), _step13; !(_iteratorNormalCompletion13 = (_step13 = _iterator13.next()).done); _iteratorNormalCompletion13 = true) {
callback = _step13.value;
callback(null, oldInflightOp);
}
} catch (err) {
_didIteratorError13 = true;
_iteratorError13 = err;
} finally {
try {
if (!_iteratorNormalCompletion13 && _iterator13.return) {
_iterator13.return();
}
} finally {
if (_didIteratorError13) {
throw _iteratorError13;
}
}
}
}
// Send the next op.
return this.delayedFlush();
} else if (msg.op) {
// We got a new op from the server.
// msg is {doc:, op:, v:}
// There is a bug in socket.io (produced on firefox 3.6) which causes messages
// to be duplicated sometimes.
// We'll just silently drop subsequent messages.
if (msg.v < this.version) {
return;
}
if (msg.doc !== this.name) {
return this.emit('error', 'Expected docName \'' + this.name + '\' but got ' + msg.doc);
}
if (msg.v !== this.version) {
return this.emit('error', 'Expected version ' + this.version + ' but got ' + msg.v);
}
// p "if: #{i @inflightOp} pending: #{i @pendingOp} doc '#{@snapshot}' op: #{i msg.op}"
var docOp = msg.op;
if (this.inflightOp !== null) {
var _Array$from9 = Array.from(this._xf(this.inflightOp, docOp));
var _Array$from10 = _slicedToArray(_Array$from9, 2);
this.inflightOp = _Array$from10[0];
docOp = _Array$from10[1];
}
if (this.pendingOp !== null) {
var _Array$from11 = Array.from(this._xf(this.pendingOp, docOp));
var _Array$from12 = _slicedToArray(_Array$from11, 2);
this.pendingOp = _Array$from12[0];
docOp = _Array$from12[1];
}
this.version++;
// Finally, apply the op to @snapshot and trigger any event listeners
return this._otApply(docOp, true, msg);
} else if (msg.meta) {
var _msg$meta = msg.meta,
path = _msg$meta.path,
value = _msg$meta.value;
switch (path != null ? path[0] : undefined) {
case 'shout':
return this.emit('shout', value);
default:
return debugConsole.warn('Unhandled meta op:', msg);
}
} else {
return debugConsole.warn('Unhandled document message:', msg);
}
}
// Send ops to the server, if appropriate.
//
// Only one op can be in-flight at a time, so if an op is already on its way then
// this method does nothing.
}, {
key: 'flush',
value: function flush() {
this.flushTimeout = null;
// console.log "CALLED FLUSH"
if (this.connection.state !== 'ok' || this.inflightOp !== null || this.pendingOp === null) {
return;
}
// Rotate null -> pending -> inflight
this.inflightOp = this.pendingOp;
this.inflightCallbacks = this.pendingCallbacks;
this.pendingOp = null;
this.pendingCallbacks = [];
this.emit('flipped_pending_to_inflight');
if (getMeta('ol-useShareJsHash') || debugging) {
var now = Date.now()
var age = this.__lastSubmitTimestamp && (now - this.__lastSubmitTimestamp)
var RECOMPUTE_HASH_INTERVAL = 5000
// check the document hash regularly (but not if we have checked in the last 5 seconds)
var needToRecomputeHash = !this.__lastSubmitTimestamp || (age > RECOMPUTE_HASH_INTERVAL) || (age < 0)
if (needToRecomputeHash || debugging) {
// send git hash of current snapshot
var sha1 = generateSHA1Hash("blob " + this.snapshot.length + "\x00" + this.snapshot)
this.__lastSubmitTimestamp = now;
}
}
// console.log "SENDING OP TO SERVER", @inflightOp, @version
var lastVersion = this.__lastVersion;
this.__lastVersion = this.version;
return this.connection.send({ doc: this.name, op: this.inflightOp, v: this.version, lastV: lastVersion, hash: sha1});
}
// Submit an op to the server. The op maybe held for a little while before being sent, as only one
// op can be inflight at any time.
}, {
key: 'submitOp',
value: function submitOp(op, callback) {
if (this.type.normalize != null) {
op = this.type.normalize(op);
}
var oldSnapshot = this.snapshot;
// If this throws an exception, no changes should have been made to the doc
this.snapshot = this.type.apply(this.snapshot, op);
if (this.pendingOp !== null) {
this.pendingOp = this.type.compose(this.pendingOp, op);
} else {
this.pendingOp = op;
}
if (callback) {
this.pendingCallbacks.push(callback);
}
this.emit('change', op, oldSnapshot);
return this.delayedFlush();
}
}, {
key: 'delayedFlush',
value: function delayedFlush() {
if (this.flushTimeout == null) {
return this.flushTimeout = setTimeout(this.flush, this._flushDelay || 0);
}
}
}, {
key: 'setFlushDelay',
value: function setFlushDelay(delay) {
return this._flushDelay = delay;
}
}, {
key: 'shout',
value: function shout(msg) {
// Meta ops don't have to queue, they can go direct. Good/bad idea?
return this.connection.send({ doc: this.name, meta: { path: ['shout'], value: msg } });
}
// Open a document. The document starts closed.
}, {
key: 'open',
value: function open(callback) {
var _this3 = this;
this.autoOpen = true;
if (this.state !== 'closed') {
return;
}
var message = {
doc: this.name,
open: true
};
if (this.snapshot === undefined) {
message.snapshot = null;
}
if (this.type) {
message.type = this.type.name;
}
if (this.version != null) {
message.v = this.version;
}
if (this._create) {
message.create = true;
}
this.connection.send(message);
this.state = 'opening';
return this._openCallback = function (error) {
_this3._openCallback = null;
return typeof callback === 'function' ? callback(error) : undefined;
};
}
// Close a document.
}, {
key: 'close',
value: function close(callback) {
this.autoOpen = false;
if (this.state === 'closed') {
return typeof callback === 'function' ? callback() : undefined;
}
this.connection.send({ doc: this.name, open: false });
// Should this happen immediately or when we get open:false back from the server?
this.state = 'closed';
this.emit('closing');
return this._closeCallback = callback;
}
}]);
return Doc;
}();
// Make documents event emitters
MicroEvent.mixin(Doc);
exports.Doc = Doc;
return exports;
})()
export default window.sharejs