Comparing version 5.1.0 to 5.2.0
@@ -18,7 +18,7 @@ # How to Contribute | ||
| ``` | ||
| npm install | ||
| npm test | ||
| yarn | ||
| yarn test | ||
| ``` | ||
| The `npm test -- dev` implements watching for tests within Node and `karma start` may be used for manual testing in browsers. | ||
| Running `yarn test -- dev` will watch for tests within Node and `karma start` may be used for manual testing in browsers. | ||
@@ -30,12 +30,9 @@ If you notice any problems, please report them to the GitHub issue tracker at | ||
| JsDiff utilizes the [release yeoman generator][generator-release] to perform most release tasks. | ||
| A full release may be completed with the following: | ||
| ``` | ||
| yo release | ||
| npm publish | ||
| yarn clean | ||
| yarn grunt | ||
| yarn grunt uglify | ||
| yarn publish | ||
| ``` | ||
| [generator-release]: https://github.com/walmartlabs/generator-release | ||
| [pull-request]: https://github.com/kpdecker/jsdiff/pull/new/master |
295
dist/diff.js
@@ -1,38 +0,1 @@ | ||
| /*! | ||
| diff v5.1.0 | ||
| Software License Agreement (BSD License) | ||
| Copyright (c) 2009-2015, Kevin Decker <kpdecker@gmail.com> | ||
| All rights reserved. | ||
| Redistribution and use of this software in source and binary forms, with or without modification, | ||
| are permitted provided that the following conditions are met: | ||
| * Redistributions of source code must retain the above | ||
| copyright notice, this list of conditions and the | ||
| following disclaimer. | ||
| * Redistributions in binary form must reproduce the above | ||
| copyright notice, this list of conditions and the | ||
| following disclaimer in the documentation and/or other | ||
| materials provided with the distribution. | ||
| * Neither the name of Kevin Decker nor the names of its | ||
| contributors may be used to endorse or promote products | ||
| derived from this software without specific prior | ||
| written permission. | ||
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR | ||
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | ||
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | ||
| CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | ||
| IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | ||
| OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| @license | ||
| */ | ||
| (function (global, factory) { | ||
@@ -47,2 +10,4 @@ typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : | ||
| diff: function diff(oldString, newString) { | ||
| var _options$timeout; | ||
| var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {}; | ||
@@ -84,10 +49,12 @@ var callback = options.callback; | ||
| var maxExecutionTime = (_options$timeout = options.timeout) !== null && _options$timeout !== void 0 ? _options$timeout : Infinity; | ||
| var abortAfterTimestamp = Date.now() + maxExecutionTime; | ||
| var bestPath = [{ | ||
| newPos: -1, | ||
| components: [] | ||
| oldPos: -1, | ||
| lastComponent: undefined | ||
| }]; // Seed editLength = 0, i.e. the content starts with the same values | ||
| var oldPos = this.extractCommon(bestPath[0], newString, oldString, 0); | ||
| var newPos = this.extractCommon(bestPath[0], newString, oldString, 0); | ||
| if (bestPath[0].newPos + 1 >= newLen && oldPos + 1 >= oldLen) { | ||
| if (bestPath[0].oldPos + 1 >= oldLen && newPos + 1 >= newLen) { | ||
| // Identity per the equality and tokenizer | ||
@@ -98,14 +65,31 @@ return done([{ | ||
| }]); | ||
| } // Main worker method. checks all permutations of a given edit length for acceptance. | ||
| } // Once we hit the right edge of the edit graph on some diagonal k, we can | ||
| // definitely reach the end of the edit graph in no more than k edits, so | ||
| // there's no point in considering any moves to diagonal k+1 any more (from | ||
| // which we're guaranteed to need at least k+1 more edits). | ||
| // Similarly, once we've reached the bottom of the edit graph, there's no | ||
| // point considering moves to lower diagonals. | ||
| // We record this fact by setting minDiagonalToConsider and | ||
| // maxDiagonalToConsider to some finite value once we've hit the edge of | ||
| // the edit graph. | ||
| // This optimization is not faithful to the original algorithm presented in | ||
| // Myers's paper, which instead pointlessly extends D-paths off the end of | ||
| // the edit graph - see page 7 of Myers's paper which notes this point | ||
| // explicitly and illustrates it with a diagram. This has major performance | ||
| // implications for some common scenarios. For instance, to compute a diff | ||
| // where the new text simply appends d characters on the end of the | ||
| // original text of length n, the true Myers algorithm will take O(n+d^2) | ||
| // time while this optimization needs only O(n+d) time. | ||
| var minDiagonalToConsider = -Infinity, | ||
| maxDiagonalToConsider = Infinity; // Main worker method. checks all permutations of a given edit length for acceptance. | ||
| function execEditLength() { | ||
| for (var diagonalPath = -1 * editLength; diagonalPath <= editLength; diagonalPath += 2) { | ||
| for (var diagonalPath = Math.max(minDiagonalToConsider, -editLength); diagonalPath <= Math.min(maxDiagonalToConsider, editLength); diagonalPath += 2) { | ||
| var basePath = void 0; | ||
| var removePath = bestPath[diagonalPath - 1], | ||
| addPath = bestPath[diagonalPath + 1]; | ||
| var addPath = bestPath[diagonalPath - 1], | ||
| removePath = bestPath[diagonalPath + 1], | ||
| _oldPos = (removePath ? removePath.newPos : 0) - diagonalPath; | ||
| if (addPath) { | ||
| if (removePath) { | ||
| // No one else is going to attempt to use this value, clear it | ||
@@ -115,5 +99,12 @@ bestPath[diagonalPath - 1] = undefined; | ||
| var canAdd = addPath && addPath.newPos + 1 < newLen, | ||
| canRemove = removePath && 0 <= _oldPos && _oldPos < oldLen; | ||
| var canAdd = false; | ||
| if (addPath) { | ||
| // what newPos will be after we do an insertion: | ||
| var addPathNewPos = addPath.oldPos - diagonalPath; | ||
| canAdd = addPath && 0 <= addPathNewPos && addPathNewPos < newLen; | ||
| } | ||
| var canRemove = removePath && removePath.oldPos + 1 < oldLen; | ||
| if (!canAdd && !canRemove) { | ||
@@ -124,23 +115,29 @@ // If this path is a terminal then prune | ||
| } // Select the diagonal that we want to branch from. We select the prior | ||
| // path whose position in the new string is the farthest from the origin | ||
| // path whose position in the old string is the farthest from the origin | ||
| // and does not pass the bounds of the diff graph | ||
| // TODO: Remove the `+ 1` here to make behavior match Myers algorithm | ||
| // and prefer to order removals before insertions. | ||
| if (!canAdd || canRemove && addPath.newPos < removePath.newPos) { | ||
| basePath = clonePath(removePath); | ||
| self.pushComponent(basePath.components, undefined, true); | ||
| if (!canRemove || canAdd && removePath.oldPos + 1 < addPath.oldPos) { | ||
| basePath = self.addToPath(addPath, true, undefined, 0); | ||
| } else { | ||
| basePath = addPath; // No need to clone, we've pulled it from the list | ||
| basePath.newPos++; | ||
| self.pushComponent(basePath.components, true, undefined); | ||
| basePath = self.addToPath(removePath, undefined, true, 1); | ||
| } | ||
| _oldPos = self.extractCommon(basePath, newString, oldString, diagonalPath); // If we have hit the end of both strings, then we are done | ||
| newPos = self.extractCommon(basePath, newString, oldString, diagonalPath); | ||
| if (basePath.newPos + 1 >= newLen && _oldPos + 1 >= oldLen) { | ||
| return done(buildValues(self, basePath.components, newString, oldString, self.useLongestToken)); | ||
| if (basePath.oldPos + 1 >= oldLen && newPos + 1 >= newLen) { | ||
| // If we have hit the end of both strings, then we are done | ||
| return done(buildValues(self, basePath.lastComponent, newString, oldString, self.useLongestToken)); | ||
| } else { | ||
| // Otherwise track this path as a potential candidate and continue. | ||
| bestPath[diagonalPath] = basePath; | ||
| if (basePath.oldPos + 1 >= oldLen) { | ||
| maxDiagonalToConsider = Math.min(maxDiagonalToConsider, diagonalPath - 1); | ||
| } | ||
| if (newPos + 1 >= newLen) { | ||
| minDiagonalToConsider = Math.max(minDiagonalToConsider, diagonalPath + 1); | ||
| } | ||
| } | ||
@@ -159,3 +156,3 @@ } | ||
| setTimeout(function () { | ||
| if (editLength > maxEditLength) { | ||
| if (editLength > maxEditLength || Date.now() > abortAfterTimestamp) { | ||
| return callback(); | ||
@@ -170,3 +167,3 @@ } | ||
| } else { | ||
| while (editLength <= maxEditLength) { | ||
| while (editLength <= maxEditLength && Date.now() <= abortAfterTimestamp) { | ||
| var ret = execEditLength(); | ||
@@ -180,19 +177,25 @@ | ||
| }, | ||
| pushComponent: function pushComponent(components, added, removed) { | ||
| var last = components[components.length - 1]; | ||
| addToPath: function addToPath(path, added, removed, oldPosInc) { | ||
| var last = path.lastComponent; | ||
| if (last && last.added === added && last.removed === removed) { | ||
| // We need to clone here as the component clone operation is just | ||
| // as shallow array clone | ||
| components[components.length - 1] = { | ||
| count: last.count + 1, | ||
| added: added, | ||
| removed: removed | ||
| return { | ||
| oldPos: path.oldPos + oldPosInc, | ||
| lastComponent: { | ||
| count: last.count + 1, | ||
| added: added, | ||
| removed: removed, | ||
| previousComponent: last.previousComponent | ||
| } | ||
| }; | ||
| } else { | ||
| components.push({ | ||
| count: 1, | ||
| added: added, | ||
| removed: removed | ||
| }); | ||
| return { | ||
| oldPos: path.oldPos + oldPosInc, | ||
| lastComponent: { | ||
| count: 1, | ||
| added: added, | ||
| removed: removed, | ||
| previousComponent: last | ||
| } | ||
| }; | ||
| } | ||
@@ -203,4 +206,4 @@ }, | ||
| oldLen = oldString.length, | ||
| newPos = basePath.newPos, | ||
| oldPos = newPos - diagonalPath, | ||
| oldPos = basePath.oldPos, | ||
| newPos = oldPos - diagonalPath, | ||
| commonCount = 0; | ||
@@ -215,9 +218,10 @@ | ||
| if (commonCount) { | ||
| basePath.components.push({ | ||
| count: commonCount | ||
| }); | ||
| basePath.lastComponent = { | ||
| count: commonCount, | ||
| previousComponent: basePath.lastComponent | ||
| }; | ||
| } | ||
| basePath.newPos = newPos; | ||
| return oldPos; | ||
| basePath.oldPos = oldPos; | ||
| return newPos; | ||
| }, | ||
@@ -253,3 +257,16 @@ equals: function equals(left, right) { | ||
| function buildValues(diff, components, newString, oldString, useLongestToken) { | ||
| function buildValues(diff, lastComponent, newString, oldString, useLongestToken) { | ||
| // First we convert our linked list of components in reverse order to an | ||
| // array in the right order: | ||
| var components = []; | ||
| var nextComponent; | ||
| while (lastComponent) { | ||
| components.push(lastComponent); | ||
| nextComponent = lastComponent.previousComponent; | ||
| delete lastComponent.previousComponent; | ||
| lastComponent = nextComponent; | ||
| } | ||
| components.reverse(); | ||
| var componentPos = 0, | ||
@@ -297,6 +314,6 @@ componentLen = components.length, | ||
| var lastComponent = components[componentLen - 1]; | ||
| var finalComponent = components[componentLen - 1]; | ||
| if (componentLen > 1 && typeof lastComponent.value === 'string' && (lastComponent.added || lastComponent.removed) && diff.equals('', lastComponent.value)) { | ||
| components[componentLen - 2].value += lastComponent.value; | ||
| if (componentLen > 1 && typeof finalComponent.value === 'string' && (finalComponent.added || finalComponent.removed) && diff.equals('', finalComponent.value)) { | ||
| components[componentLen - 2].value += finalComponent.value; | ||
| components.pop(); | ||
@@ -308,9 +325,2 @@ } | ||
| function clonePath(path) { | ||
| return { | ||
| newPos: path.newPos, | ||
| components: path.components.slice(0) | ||
| }; | ||
| } | ||
| var characterDiff = new Diff(); | ||
@@ -396,2 +406,7 @@ function diffChars(oldStr, newStr, options) { | ||
| lineDiff.tokenize = function (value) { | ||
| if (this.options.stripTrailingCr) { | ||
| // remove one \r before \n to match GNU diff's --strip-trailing-cr behavior | ||
| value = value.replace(/\r\n/g, '\n'); | ||
| } | ||
| var retLines = [], | ||
@@ -468,2 +483,51 @@ linesAndNewlines = value.split(/(\n|\r\n)/); // Ignore the final empty token that occurs if the string ends with a new line | ||
| function _defineProperty(obj, key, value) { | ||
| if (key in obj) { | ||
| Object.defineProperty(obj, key, { | ||
| value: value, | ||
| enumerable: true, | ||
| configurable: true, | ||
| writable: true | ||
| }); | ||
| } else { | ||
| obj[key] = value; | ||
| } | ||
| return obj; | ||
| } | ||
| function ownKeys(object, enumerableOnly) { | ||
| var keys = Object.keys(object); | ||
| if (Object.getOwnPropertySymbols) { | ||
| var symbols = Object.getOwnPropertySymbols(object); | ||
| if (enumerableOnly) symbols = symbols.filter(function (sym) { | ||
| return Object.getOwnPropertyDescriptor(object, sym).enumerable; | ||
| }); | ||
| keys.push.apply(keys, symbols); | ||
| } | ||
| return keys; | ||
| } | ||
| function _objectSpread2(target) { | ||
| for (var i = 1; i < arguments.length; i++) { | ||
| var source = arguments[i] != null ? arguments[i] : {}; | ||
| if (i % 2) { | ||
| ownKeys(Object(source), true).forEach(function (key) { | ||
| _defineProperty(target, key, source[key]); | ||
| }); | ||
| } else if (Object.getOwnPropertyDescriptors) { | ||
| Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); | ||
| } else { | ||
| ownKeys(Object(source)).forEach(function (key) { | ||
| Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); | ||
| }); | ||
| } | ||
| } | ||
| return target; | ||
| } | ||
| function _toConsumableArray(arr) { | ||
@@ -901,3 +965,3 @@ return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); | ||
| content = line.length > 0 ? line.substr(1) : line, | ||
| delimiter = _hunk.linedelimiters[j]; | ||
| delimiter = _hunk.linedelimiters && _hunk.linedelimiters[j] || '\n'; | ||
@@ -1109,2 +1173,6 @@ if (operation === ' ') { | ||
| function formatPatch(diff) { | ||
| if (Array.isArray(diff)) { | ||
| return diff.map(formatPatch).join('\n'); | ||
| } | ||
| var ret = []; | ||
@@ -1565,2 +1633,35 @@ | ||
| function reversePatch(structuredPatch) { | ||
| if (Array.isArray(structuredPatch)) { | ||
| return structuredPatch.map(reversePatch).reverse(); | ||
| } | ||
| return _objectSpread2(_objectSpread2({}, structuredPatch), {}, { | ||
| oldFileName: structuredPatch.newFileName, | ||
| oldHeader: structuredPatch.newHeader, | ||
| newFileName: structuredPatch.oldFileName, | ||
| newHeader: structuredPatch.oldHeader, | ||
| hunks: structuredPatch.hunks.map(function (hunk) { | ||
| return { | ||
| oldLines: hunk.newLines, | ||
| oldStart: hunk.newStart, | ||
| newLines: hunk.oldLines, | ||
| newStart: hunk.oldStart, | ||
| linedelimiters: hunk.linedelimiters, | ||
| lines: hunk.lines.map(function (l) { | ||
| if (l.startsWith('-')) { | ||
| return "+".concat(l.slice(1)); | ||
| } | ||
| if (l.startsWith('+')) { | ||
| return "-".concat(l.slice(1)); | ||
| } | ||
| return l; | ||
| }) | ||
| }; | ||
| }) | ||
| }); | ||
| } | ||
| // See: http://code.google.com/p/google-diff-match-patch/wiki/API | ||
@@ -1639,4 +1740,6 @@ function convertChangesToDMP(changes) { | ||
| exports.diffWordsWithSpace = diffWordsWithSpace; | ||
| exports.formatPatch = formatPatch; | ||
| exports.merge = merge; | ||
| exports.parsePatch = parsePatch; | ||
| exports.reversePatch = reversePatch; | ||
| exports.structuredPatch = structuredPatch; | ||
@@ -1643,0 +1746,0 @@ |
@@ -1,38 +0,1 @@ | ||
| /*! | ||
| diff v5.1.0 | ||
| Software License Agreement (BSD License) | ||
| Copyright (c) 2009-2015, Kevin Decker <kpdecker@gmail.com> | ||
| All rights reserved. | ||
| Redistribution and use of this software in source and binary forms, with or without modification, | ||
| are permitted provided that the following conditions are met: | ||
| * Redistributions of source code must retain the above | ||
| copyright notice, this list of conditions and the | ||
| following disclaimer. | ||
| * Redistributions in binary form must reproduce the above | ||
| copyright notice, this list of conditions and the | ||
| following disclaimer in the documentation and/or other | ||
| materials provided with the distribution. | ||
| * Neither the name of Kevin Decker nor the names of its | ||
| contributors may be used to endorse or promote products | ||
| derived from this software without specific prior | ||
| written permission. | ||
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR | ||
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | ||
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | ||
| CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | ||
| IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | ||
| OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| @license | ||
| */ | ||
| !function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n((e=e||self).Diff={})}(this,function(e){"use strict";function t(){}t.prototype={diff:function(u,a,e){var n=2<arguments.length&&void 0!==e?e:{},t=n.callback;"function"==typeof n&&(t=n,n={}),this.options=n;var f=this;function d(e){return t?(setTimeout(function(){t(void 0,e)},0),!0):e}u=this.castInput(u),a=this.castInput(a),u=this.removeEmpty(this.tokenize(u));var c=(a=this.removeEmpty(this.tokenize(a))).length,h=u.length,p=1,r=c+h;n.maxEditLength&&(r=Math.min(r,n.maxEditLength));var v=[{newPos:-1,components:[]}],i=this.extractCommon(v[0],a,u,0);if(v[0].newPos+1>=c&&h<=i+1)return d([{value:this.join(a),count:a.length}]);function o(){for(var e,n=-1*p;n<=p;n+=2){var t=void 0,r=v[n-1],i=v[n+1],o=(i?i.newPos:0)-n;r&&(v[n-1]=void 0);var l=r&&r.newPos+1<c,s=i&&0<=o&&o<h;if(l||s){if(!l||s&&r.newPos<i.newPos?(t={newPos:(e=i).newPos,components:e.components.slice(0)},f.pushComponent(t.components,void 0,!0)):((t=r).newPos++,f.pushComponent(t.components,!0,void 0)),o=f.extractCommon(t,a,u,n),t.newPos+1>=c&&h<=o+1)return d(function(e,n,t,r,i){for(var o=0,l=n.length,s=0,u=0;o<l;o++){var a,f,d=n[o];d.removed?(d.value=e.join(r.slice(u,u+d.count)),u+=d.count,o&&n[o-1].added&&(a=n[o-1],n[o-1]=n[o],n[o]=a)):(!d.added&&i?(f=(f=t.slice(s,s+d.count)).map(function(e,n){var t=r[u+n];return t.length>e.length?t:e}),d.value=e.join(f)):d.value=e.join(t.slice(s,s+d.count)),s+=d.count,d.added||(u+=d.count))}var c=n[l-1];1<l&&"string"==typeof c.value&&(c.added||c.removed)&&e.equals("",c.value)&&(n[l-2].value+=c.value,n.pop());return n}(f,t.components,a,u,f.useLongestToken));v[n]=t}else v[n]=void 0}p++}if(t)!function e(){setTimeout(function(){return r<p?t():void(o()||e())},0)}();else for(;p<=r;){var l=o();if(l)return l}},pushComponent:function(e,n,t){var r=e[e.length-1];r&&r.added===n&&r.removed===t?e[e.length-1]={count:r.count+1,added:n,removed:t}:e.push({count:1,added:n,removed:t})},extractCommon:function(e,n,t,r){for(var i=n.length,o=t.length,l=e.newPos,s=l-r,u=0;l+1<i&&s+1<o&&this.equals(n[l+1],t[s+1]);)l++,s++,u++;return u&&e.components.push({count:u}),e.newPos=l,s},equals:function(e,n){return this.options.comparator?this.options.comparator(e,n):e===n||this.options.ignoreCase&&e.toLowerCase()===n.toLowerCase()},removeEmpty:function(e){for(var n=[],t=0;t<e.length;t++)e[t]&&n.push(e[t]);return n},castInput:function(e){return e},tokenize:function(e){return e.split("")},join:function(e){return e.join("")}};var r=new t;function i(e,n){if("function"==typeof e)n.callback=e;else if(e)for(var t in e)e.hasOwnProperty(t)&&(n[t]=e[t]);return n}var o=/^[A-Za-z\xC0-\u02C6\u02C8-\u02D7\u02DE-\u02FF\u1E00-\u1EFF]+$/,l=/\S/,s=new t;s.equals=function(e,n){return 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@@ -18,2 +18,4 @@ /*istanbul ignore start*/ | ||
| /*istanbul ignore start*/ | ||
| var _options$timeout; | ||
| var | ||
@@ -57,10 +59,16 @@ /*istanbul ignore end*/ | ||
| var maxExecutionTime = | ||
| /*istanbul ignore start*/ | ||
| (_options$timeout = | ||
| /*istanbul ignore end*/ | ||
| options.timeout) !== null && _options$timeout !== void 0 ? _options$timeout : Infinity; | ||
| var abortAfterTimestamp = Date.now() + maxExecutionTime; | ||
| var bestPath = [{ | ||
| newPos: -1, | ||
| components: [] | ||
| oldPos: -1, | ||
| lastComponent: undefined | ||
| }]; // Seed editLength = 0, i.e. the content starts with the same values | ||
| var oldPos = this.extractCommon(bestPath[0], newString, oldString, 0); | ||
| var newPos = this.extractCommon(bestPath[0], newString, oldString, 0); | ||
| if (bestPath[0].newPos + 1 >= newLen && oldPos + 1 >= oldLen) { | ||
| if (bestPath[0].oldPos + 1 >= oldLen && newPos + 1 >= newLen) { | ||
| // Identity per the equality and tokenizer | ||
@@ -71,7 +79,26 @@ return done([{ | ||
| }]); | ||
| } // Main worker method. checks all permutations of a given edit length for acceptance. | ||
| } // Once we hit the right edge of the edit graph on some diagonal k, we can | ||
| // definitely reach the end of the edit graph in no more than k edits, so | ||
| // there's no point in considering any moves to diagonal k+1 any more (from | ||
| // which we're guaranteed to need at least k+1 more edits). | ||
| // Similarly, once we've reached the bottom of the edit graph, there's no | ||
| // point considering moves to lower diagonals. | ||
| // We record this fact by setting minDiagonalToConsider and | ||
| // maxDiagonalToConsider to some finite value once we've hit the edge of | ||
| // the edit graph. | ||
| // This optimization is not faithful to the original algorithm presented in | ||
| // Myers's paper, which instead pointlessly extends D-paths off the end of | ||
| // the edit graph - see page 7 of Myers's paper which notes this point | ||
| // explicitly and illustrates it with a diagram. This has major performance | ||
| // implications for some common scenarios. For instance, to compute a diff | ||
| // where the new text simply appends d characters on the end of the | ||
| // original text of length n, the true Myers algorithm will take O(n+d^2) | ||
| // time while this optimization needs only O(n+d) time. | ||
| var minDiagonalToConsider = -Infinity, | ||
| maxDiagonalToConsider = Infinity; // Main worker method. checks all permutations of a given edit length for acceptance. | ||
| function execEditLength() { | ||
| for (var diagonalPath = -1 * editLength; diagonalPath <= editLength; diagonalPath += 2) { | ||
| for (var diagonalPath = Math.max(minDiagonalToConsider, -editLength); diagonalPath <= Math.min(maxDiagonalToConsider, editLength); diagonalPath += 2) { | ||
| var basePath = | ||
@@ -82,8 +109,6 @@ /*istanbul ignore start*/ | ||
| ; | ||
| var removePath = bestPath[diagonalPath - 1], | ||
| addPath = bestPath[diagonalPath + 1]; | ||
| var addPath = bestPath[diagonalPath - 1], | ||
| removePath = bestPath[diagonalPath + 1], | ||
| _oldPos = (removePath ? removePath.newPos : 0) - diagonalPath; | ||
| if (addPath) { | ||
| if (removePath) { | ||
| // No one else is going to attempt to use this value, clear it | ||
@@ -93,5 +118,12 @@ bestPath[diagonalPath - 1] = undefined; | ||
| var canAdd = addPath && addPath.newPos + 1 < newLen, | ||
| canRemove = removePath && 0 <= _oldPos && _oldPos < oldLen; | ||
| var canAdd = false; | ||
| if (addPath) { | ||
| // what newPos will be after we do an insertion: | ||
| var addPathNewPos = addPath.oldPos - diagonalPath; | ||
| canAdd = addPath && 0 <= addPathNewPos && addPathNewPos < newLen; | ||
| } | ||
| var canRemove = removePath && removePath.oldPos + 1 < oldLen; | ||
| if (!canAdd && !canRemove) { | ||
@@ -102,23 +134,29 @@ // If this path is a terminal then prune | ||
| } // Select the diagonal that we want to branch from. We select the prior | ||
| // path whose position in the new string is the farthest from the origin | ||
| // path whose position in the old string is the farthest from the origin | ||
| // and does not pass the bounds of the diff graph | ||
| // TODO: Remove the `+ 1` here to make behavior match Myers algorithm | ||
| // and prefer to order removals before insertions. | ||
| if (!canAdd || canRemove && addPath.newPos < removePath.newPos) { | ||
| basePath = clonePath(removePath); | ||
| self.pushComponent(basePath.components, undefined, true); | ||
| if (!canRemove || canAdd && removePath.oldPos + 1 < addPath.oldPos) { | ||
| basePath = self.addToPath(addPath, true, undefined, 0); | ||
| } else { | ||
| basePath = addPath; // No need to clone, we've pulled it from the list | ||
| basePath.newPos++; | ||
| self.pushComponent(basePath.components, true, undefined); | ||
| basePath = self.addToPath(removePath, undefined, true, 1); | ||
| } | ||
| _oldPos = self.extractCommon(basePath, newString, oldString, diagonalPath); // If we have hit the end of both strings, then we are done | ||
| newPos = self.extractCommon(basePath, newString, oldString, diagonalPath); | ||
| if (basePath.newPos + 1 >= newLen && _oldPos + 1 >= oldLen) { | ||
| return done(buildValues(self, basePath.components, newString, oldString, self.useLongestToken)); | ||
| if (basePath.oldPos + 1 >= oldLen && newPos + 1 >= newLen) { | ||
| // If we have hit the end of both strings, then we are done | ||
| return done(buildValues(self, basePath.lastComponent, newString, oldString, self.useLongestToken)); | ||
| } else { | ||
| // Otherwise track this path as a potential candidate and continue. | ||
| bestPath[diagonalPath] = basePath; | ||
| if (basePath.oldPos + 1 >= oldLen) { | ||
| maxDiagonalToConsider = Math.min(maxDiagonalToConsider, diagonalPath - 1); | ||
| } | ||
| if (newPos + 1 >= newLen) { | ||
| minDiagonalToConsider = Math.max(minDiagonalToConsider, diagonalPath + 1); | ||
| } | ||
| } | ||
@@ -137,3 +175,3 @@ } | ||
| setTimeout(function () { | ||
| if (editLength > maxEditLength) { | ||
| if (editLength > maxEditLength || Date.now() > abortAfterTimestamp) { | ||
| return callback(); | ||
@@ -148,3 +186,3 @@ } | ||
| } else { | ||
| while (editLength <= maxEditLength) { | ||
| while (editLength <= maxEditLength && Date.now() <= abortAfterTimestamp) { | ||
| var ret = execEditLength(); | ||
@@ -162,19 +200,25 @@ | ||
| /*istanbul ignore end*/ | ||
| pushComponent: function pushComponent(components, added, removed) { | ||
| var last = components[components.length - 1]; | ||
| addToPath: function addToPath(path, added, removed, oldPosInc) { | ||
| var last = path.lastComponent; | ||
| if (last && last.added === added && last.removed === removed) { | ||
| // We need to clone here as the component clone operation is just | ||
| // as shallow array clone | ||
| components[components.length - 1] = { | ||
| count: last.count + 1, | ||
| added: added, | ||
| removed: removed | ||
| return { | ||
| oldPos: path.oldPos + oldPosInc, | ||
| lastComponent: { | ||
| count: last.count + 1, | ||
| added: added, | ||
| removed: removed, | ||
| previousComponent: last.previousComponent | ||
| } | ||
| }; | ||
| } else { | ||
| components.push({ | ||
| count: 1, | ||
| added: added, | ||
| removed: removed | ||
| }); | ||
| return { | ||
| oldPos: path.oldPos + oldPosInc, | ||
| lastComponent: { | ||
| count: 1, | ||
| added: added, | ||
| removed: removed, | ||
| previousComponent: last | ||
| } | ||
| }; | ||
| } | ||
@@ -189,4 +233,4 @@ }, | ||
| oldLen = oldString.length, | ||
| newPos = basePath.newPos, | ||
| oldPos = newPos - diagonalPath, | ||
| oldPos = basePath.oldPos, | ||
| newPos = oldPos - diagonalPath, | ||
| commonCount = 0; | ||
@@ -201,9 +245,10 @@ | ||
| if (commonCount) { | ||
| basePath.components.push({ | ||
| count: commonCount | ||
| }); | ||
| basePath.lastComponent = { | ||
| count: commonCount, | ||
| previousComponent: basePath.lastComponent | ||
| }; | ||
| } | ||
| basePath.newPos = newPos; | ||
| return oldPos; | ||
| basePath.oldPos = oldPos; | ||
| return newPos; | ||
| }, | ||
@@ -259,3 +304,16 @@ | ||
| function buildValues(diff, components, newString, oldString, useLongestToken) { | ||
| function buildValues(diff, lastComponent, newString, oldString, useLongestToken) { | ||
| // First we convert our linked list of components in reverse order to an | ||
| // array in the right order: | ||
| var components = []; | ||
| var nextComponent; | ||
| while (lastComponent) { | ||
| components.push(lastComponent); | ||
| nextComponent = lastComponent.previousComponent; | ||
| delete lastComponent.previousComponent; | ||
| lastComponent = nextComponent; | ||
| } | ||
| components.reverse(); | ||
| var componentPos = 0, | ||
@@ -303,6 +361,6 @@ componentLen = components.length, | ||
| var lastComponent = components[componentLen - 1]; | ||
| var finalComponent = components[componentLen - 1]; | ||
| if (componentLen > 1 && typeof lastComponent.value === 'string' && (lastComponent.added || lastComponent.removed) && diff.equals('', lastComponent.value)) { | ||
| components[componentLen - 2].value += lastComponent.value; | ||
| if (componentLen > 1 && typeof finalComponent.value === 'string' && (finalComponent.added || finalComponent.removed) && diff.equals('', finalComponent.value)) { | ||
| components[componentLen - 2].value += finalComponent.value; | ||
| components.pop(); | ||
@@ -313,9 +371,2 @@ } | ||
| } | ||
| function clonePath(path) { | ||
| return { | ||
| newPos: path.newPos, | ||
| components: path.components.slice(0) | ||
| }; | ||
| } | ||
| //# 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}\n\n    let bestPath = [{ newPos: -1, components: [] }];\n\n    // Seed editLength = 0, i.e. the content starts with the same values\n    let oldPos = this.extractCommon(bestPath[0], newString, oldString, 0);\n    if (bestPath[0].newPos + 1 >= newLen && oldPos + 1 >= oldLen) {\n      // Identity per the equality and tokenizer\n      return done([{value: this.join(newString), count: newString.length}]);\n    }\n\n    // Main worker method. checks all permutations of a given edit length for acceptance.\n    function execEditLength() {\n      for (let diagonalPath = -1 * editLength; diagonalPath <= editLength; diagonalPath += 2) {\n        let basePath;\n        let addPath = bestPath[diagonalPath - 1],\n            removePath = bestPath[diagonalPath + 1],\n            oldPos = (removePath ? removePath.newPos : 0) - diagonalPath;\n        if (addPath) {\n          // No one else is going to attempt to use this value, clear it\n          bestPath[diagonalPath - 1] = undefined;\n        }\n\n        let canAdd = addPath && addPath.newPos + 1 < newLen,\n            canRemove = removePath && 0 <= oldPos && oldPos < oldLen;\n        if (!canAdd && !canRemove) {\n          // If this path is a terminal then prune\n          bestPath[diagonalPath] = undefined;\n          continue;\n        }\n\n        // Select the diagonal that we want to branch from. We select the prior\n        // path whose position in the new string is the farthest from the origin\n        // and does not pass the bounds of the diff graph\n        if (!canAdd || (canRemove && addPath.newPos < removePath.newPos)) {\n          basePath = clonePath(removePath);\n          self.pushComponent(basePath.components, undefined, true);\n        } else {\n          basePath = addPath; // No need to clone, we've pulled it from the list\n          basePath.newPos++;\n          self.pushComponent(basePath.components, true, undefined);\n        }\n\n        oldPos = self.extractCommon(basePath, newString, oldString, diagonalPath);\n\n        // If we have hit the end of both strings, then we are done\n        if (basePath.newPos + 1 >= newLen && oldPos + 1 >= oldLen) {\n          return done(buildValues(self, basePath.components, newString, oldString, self.useLongestToken));\n        } else {\n          // Otherwise track this path as a potential candidate and continue.\n          bestPath[diagonalPath] = basePath;\n        }\n      }\n\n      editLength++;\n    }\n\n    // Performs the length of edit iteration. Is a bit fugly as this has to support the\n    // sync and async mode which is never fun. 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| //# 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default function Diff() {}\n\nDiff.prototype = {\n  diff(oldString, newString, options = {}) {\n    let callback = options.callback;\n    if (typeof options === 'function') {\n      callback = options;\n      options = {};\n    }\n    this.options = options;\n\n    let self = this;\n\n    function done(value) {\n      if (callback) {\n        setTimeout(function() { callback(undefined, value); }, 0);\n        return true;\n      } else {\n        return value;\n      }\n    }\n\n    // Allow subclasses to massage the input prior to running\n    oldString = this.castInput(oldString);\n    newString = this.castInput(newString);\n\n    oldString = this.removeEmpty(this.tokenize(oldString));\n    newString = this.removeEmpty(this.tokenize(newString));\n\n    let newLen = newString.length, oldLen = oldString.length;\n    let editLength = 1;\n    let maxEditLength = newLen + oldLen;\n    if(options.maxEditLength) {\n      maxEditLength = Math.min(maxEditLength, options.maxEditLength);\n    }\n    const maxExecutionTime = options.timeout ?? Infinity;\n    const abortAfterTimestamp = Date.now() + maxExecutionTime;\n\n    let bestPath = [{ oldPos: -1, lastComponent: undefined }];\n\n    // Seed editLength = 0, i.e. the content starts with the same values\n    let newPos = this.extractCommon(bestPath[0], newString, oldString, 0);\n    if (bestPath[0].oldPos + 1 >= oldLen && newPos + 1 >= newLen) {\n      // Identity per the equality and tokenizer\n      return done([{value: this.join(newString), count: newString.length}]);\n    }\n\n    // Once we hit the right edge of the edit graph on some diagonal k, we can\n    // definitely reach the end of the edit graph in no more than k edits, so\n    // there's no point in considering any moves to diagonal k+1 any more (from\n    // which we're guaranteed to need at least k+1 more edits).\n    // Similarly, once we've reached the bottom of the edit graph, there's no\n    // point considering moves to lower diagonals.\n    // We record this fact by setting minDiagonalToConsider and\n    // maxDiagonalToConsider to some finite value once we've hit the edge of\n    // the edit graph.\n    // This optimization is not faithful to the original algorithm presented in\n    // Myers's paper, which instead pointlessly extends D-paths off the end of\n    // the edit graph - see page 7 of Myers's paper which notes this point\n    // explicitly and illustrates it with a diagram. This has major performance\n    // implications for some common scenarios. For instance, to compute a diff\n    // where the new text simply appends d characters on the end of the\n    // original text of length n, the true Myers algorithm will take O(n+d^2)\n    // time while this optimization needs only O(n+d) time.\n    let minDiagonalToConsider = -Infinity, maxDiagonalToConsider = Infinity;\n\n    // Main worker method. checks all permutations of a given edit length for acceptance.\n    function execEditLength() {\n      for (\n        let diagonalPath = Math.max(minDiagonalToConsider, -editLength);\n        diagonalPath <= Math.min(maxDiagonalToConsider, editLength);\n        diagonalPath += 2\n      ) {\n        let basePath;\n        let removePath = bestPath[diagonalPath - 1],\n            addPath = bestPath[diagonalPath + 1];\n        if (removePath) {\n          // No one else is going to attempt to use this value, clear it\n          bestPath[diagonalPath - 1] = undefined;\n        }\n\n        let canAdd = false;\n        if (addPath) {\n          // what newPos will be after we do an insertion:\n          const addPathNewPos = addPath.oldPos - diagonalPath;\n          canAdd = addPath && 0 <= addPathNewPos && addPathNewPos < newLen;\n        }\n\n        let canRemove = removePath && removePath.oldPos + 1 < oldLen;\n        if (!canAdd && !canRemove) {\n          // If this path is a terminal then prune\n          bestPath[diagonalPath] = undefined;\n          continue;\n        }\n\n        // Select the diagonal that we want to branch from. We select the prior\n        // path whose position in the old string is the farthest from the origin\n        // and does not pass the bounds of the diff graph\n        // TODO: Remove the `+ 1` here to make behavior match Myers algorithm\n        //       and prefer to order removals before insertions.\n        if (!canRemove || (canAdd && removePath.oldPos + 1 < addPath.oldPos)) {\n          basePath = self.addToPath(addPath, true, undefined, 0);\n        } else {\n          basePath = self.addToPath(removePath, undefined, true, 1);\n        }\n\n        newPos = self.extractCommon(basePath, newString, oldString, diagonalPath);\n\n        if (basePath.oldPos + 1 >= oldLen && newPos + 1 >= newLen) {\n          // If we have hit the end of both strings, then we are done\n          return done(buildValues(self, basePath.lastComponent, newString, oldString, self.useLongestToken));\n        } else {\n          bestPath[diagonalPath] = basePath;\n          if (basePath.oldPos + 1 >= oldLen) {\n            maxDiagonalToConsider = Math.min(maxDiagonalToConsider, diagonalPath - 1);\n          }\n          if (newPos + 1 >= newLen) {\n            minDiagonalToConsider = Math.max(minDiagonalToConsider, diagonalPath + 1);\n          }\n        }\n      }\n\n      editLength++;\n    }\n\n    // Performs the length of edit iteration. Is a bit fugly as this has to support the\n    // sync and async mode which is never fun. Loops over execEditLength until a value\n    // is produced, or until the edit length exceeds options.maxEditLength (if given),\n    // in which case it will return undefined.\n    if (callback) {\n      (function exec() {\n        setTimeout(function() {\n          if (editLength > maxEditLength || Date.now() > abortAfterTimestamp) {\n            return callback();\n          }\n\n          if (!execEditLength()) {\n            exec();\n          }\n        }, 0);\n      }());\n    } else {\n      while (editLength <= maxEditLength && Date.now() <= abortAfterTimestamp) {\n        let ret = execEditLength();\n        if (ret) {\n          return ret;\n        }\n      }\n    }\n  },\n\n  addToPath(path, added, removed, oldPosInc) {\n    let last = path.lastComponent;\n    if (last && last.added === added && last.removed === removed) {\n      return {\n        oldPos: path.oldPos + oldPosInc,\n        lastComponent: {count: last.count + 1, added: added, removed: removed, previousComponent: last.previousComponent }\n      };\n    } else {\n      return {\n        oldPos: path.oldPos + oldPosInc,\n        lastComponent: {count: 1, added: added, removed: removed, previousComponent: last }\n      };\n    }\n  },\n  extractCommon(basePath, newString, oldString, diagonalPath) {\n    let newLen = newString.length,\n        oldLen = oldString.length,\n        oldPos = basePath.oldPos,\n        newPos = oldPos - diagonalPath,\n\n        commonCount = 0;\n    while (newPos + 1 < newLen && oldPos + 1 < oldLen && this.equals(newString[newPos + 1], oldString[oldPos + 1])) {\n      newPos++;\n      oldPos++;\n      commonCount++;\n    }\n\n    if (commonCount) {\n      basePath.lastComponent = {count: commonCount, previousComponent: basePath.lastComponent};\n    }\n\n    basePath.oldPos = oldPos;\n    return newPos;\n  },\n\n  equals(left, right) {\n    if (this.options.comparator) {\n      return this.options.comparator(left, right);\n    } else {\n      return left === right\n        || (this.options.ignoreCase && left.toLowerCase() === right.toLowerCase());\n    }\n  },\n  removeEmpty(array) {\n    let ret = [];\n    for (let i = 0; i < array.length; i++) {\n      if (array[i]) {\n        ret.push(array[i]);\n      }\n    }\n    return ret;\n  },\n  castInput(value) {\n    return value;\n  },\n  tokenize(value) {\n    return value.split('');\n  },\n  join(chars) {\n    return chars.join('');\n  }\n};\n\nfunction buildValues(diff, lastComponent, newString, oldString, useLongestToken) {\n  // First we convert our linked list of components in reverse order to an\n  // array in the right order:\n  const components = [];\n  let nextComponent;\n  while (lastComponent) {\n    components.push(lastComponent);\n    nextComponent = lastComponent.previousComponent;\n    delete lastComponent.previousComponent;\n    lastComponent = nextComponent;\n  }\n  components.reverse();\n\n  let componentPos = 0,\n      componentLen = components.length,\n      newPos = 0,\n      oldPos = 0;\n\n  for (; componentPos < componentLen; componentPos++) {\n    let component = components[componentPos];\n    if (!component.removed) {\n      if (!component.added && useLongestToken) {\n        let value = newString.slice(newPos, newPos + component.count);\n        value = value.map(function(value, i) {\n          let oldValue = oldString[oldPos + i];\n          return oldValue.length > value.length ? oldValue : value;\n        });\n\n        component.value = diff.join(value);\n      } else {\n        component.value = diff.join(newString.slice(newPos, newPos + component.count));\n      }\n      newPos += component.count;\n\n      // Common case\n      if (!component.added) {\n        oldPos += component.count;\n      }\n    } else {\n      component.value = diff.join(oldString.slice(oldPos, oldPos + component.count));\n      oldPos += component.count;\n\n      // Reverse add and remove so removes are output first to match common convention\n      // The diffing algorithm is tied to add then remove output and this is the simplest\n      // route to get the desired output with minimal overhead.\n      if (componentPos && components[componentPos - 1].added) {\n        let tmp = components[componentPos - 1];\n        components[componentPos - 1] = components[componentPos];\n        components[componentPos] = tmp;\n      }\n    }\n  }\n\n  // Special case handle for when one terminal is ignored (i.e. whitespace).\n  // For this case we merge the terminal into the prior string and drop the change.\n  // This is only available for string mode.\n  let finalComponent = components[componentLen - 1];\n  if (componentLen > 1\n      && typeof finalComponent.value === 'string'\n      && (finalComponent.added || finalComponent.removed)\n      && diff.equals('', finalComponent.value)) {\n    components[componentLen - 2].value += finalComponent.value;\n    components.pop();\n  }\n\n  return components;\n}\n"]} |
@@ -42,2 +42,7 @@ /*istanbul ignore start*/ | ||
| lineDiff.tokenize = function (value) { | ||
| if (this.options.stripTrailingCr) { | ||
| // remove one \r before \n to match GNU diff's --strip-trailing-cr behavior | ||
| value = value.replace(/\r\n/g, '\n'); | ||
| } | ||
| var retLines = [], | ||
@@ -90,2 +95,2 @@ linesAndNewlines = value.split(/(\n|\r\n)/); // Ignore the final empty token that occurs if the string ends with a new line | ||
| } | ||
| //# sourceMappingURL=data:application/json;charset=utf-8;base64,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 | ||
| //# sourceMappingURL=data:application/json;charset=utf-8;base64,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 |
| function Diff() {} | ||
| Diff.prototype = { | ||
| diff: function diff(oldString, newString) { | ||
| var _options$timeout; | ||
| var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {}; | ||
@@ -40,10 +42,12 @@ var callback = options.callback; | ||
| var maxExecutionTime = (_options$timeout = options.timeout) !== null && _options$timeout !== void 0 ? _options$timeout : Infinity; | ||
| var abortAfterTimestamp = Date.now() + maxExecutionTime; | ||
| var bestPath = [{ | ||
| newPos: -1, | ||
| components: [] | ||
| oldPos: -1, | ||
| lastComponent: undefined | ||
| }]; // Seed editLength = 0, i.e. the content starts with the same values | ||
| var oldPos = this.extractCommon(bestPath[0], newString, oldString, 0); | ||
| var newPos = this.extractCommon(bestPath[0], newString, oldString, 0); | ||
| if (bestPath[0].newPos + 1 >= newLen && oldPos + 1 >= oldLen) { | ||
| if (bestPath[0].oldPos + 1 >= oldLen && newPos + 1 >= newLen) { | ||
| // Identity per the equality and tokenizer | ||
@@ -54,14 +58,31 @@ return done([{ | ||
| }]); | ||
| } // Main worker method. checks all permutations of a given edit length for acceptance. | ||
| } // Once we hit the right edge of the edit graph on some diagonal k, we can | ||
| // definitely reach the end of the edit graph in no more than k edits, so | ||
| // there's no point in considering any moves to diagonal k+1 any more (from | ||
| // which we're guaranteed to need at least k+1 more edits). | ||
| // Similarly, once we've reached the bottom of the edit graph, there's no | ||
| // point considering moves to lower diagonals. | ||
| // We record this fact by setting minDiagonalToConsider and | ||
| // maxDiagonalToConsider to some finite value once we've hit the edge of | ||
| // the edit graph. | ||
| // This optimization is not faithful to the original algorithm presented in | ||
| // Myers's paper, which instead pointlessly extends D-paths off the end of | ||
| // the edit graph - see page 7 of Myers's paper which notes this point | ||
| // explicitly and illustrates it with a diagram. This has major performance | ||
| // implications for some common scenarios. For instance, to compute a diff | ||
| // where the new text simply appends d characters on the end of the | ||
| // original text of length n, the true Myers algorithm will take O(n+d^2) | ||
| // time while this optimization needs only O(n+d) time. | ||
| var minDiagonalToConsider = -Infinity, | ||
| maxDiagonalToConsider = Infinity; // Main worker method. checks all permutations of a given edit length for acceptance. | ||
| function execEditLength() { | ||
| for (var diagonalPath = -1 * editLength; diagonalPath <= editLength; diagonalPath += 2) { | ||
| for (var diagonalPath = Math.max(minDiagonalToConsider, -editLength); diagonalPath <= Math.min(maxDiagonalToConsider, editLength); diagonalPath += 2) { | ||
| var basePath = void 0; | ||
| var removePath = bestPath[diagonalPath - 1], | ||
| addPath = bestPath[diagonalPath + 1]; | ||
| var addPath = bestPath[diagonalPath - 1], | ||
| removePath = bestPath[diagonalPath + 1], | ||
| _oldPos = (removePath ? removePath.newPos : 0) - diagonalPath; | ||
| if (addPath) { | ||
| if (removePath) { | ||
| // No one else is going to attempt to use this value, clear it | ||
@@ -71,5 +92,12 @@ bestPath[diagonalPath - 1] = undefined; | ||
| var canAdd = addPath && addPath.newPos + 1 < newLen, | ||
| canRemove = removePath && 0 <= _oldPos && _oldPos < oldLen; | ||
| var canAdd = false; | ||
| if (addPath) { | ||
| // what newPos will be after we do an insertion: | ||
| var addPathNewPos = addPath.oldPos - diagonalPath; | ||
| canAdd = addPath && 0 <= addPathNewPos && addPathNewPos < newLen; | ||
| } | ||
| var canRemove = removePath && removePath.oldPos + 1 < oldLen; | ||
| if (!canAdd && !canRemove) { | ||
@@ -80,23 +108,29 @@ // If this path is a terminal then prune | ||
| } // Select the diagonal that we want to branch from. We select the prior | ||
| // path whose position in the new string is the farthest from the origin | ||
| // path whose position in the old string is the farthest from the origin | ||
| // and does not pass the bounds of the diff graph | ||
| // TODO: Remove the `+ 1` here to make behavior match Myers algorithm | ||
| // and prefer to order removals before insertions. | ||
| if (!canAdd || canRemove && addPath.newPos < removePath.newPos) { | ||
| basePath = clonePath(removePath); | ||
| self.pushComponent(basePath.components, undefined, true); | ||
| if (!canRemove || canAdd && removePath.oldPos + 1 < addPath.oldPos) { | ||
| basePath = self.addToPath(addPath, true, undefined, 0); | ||
| } else { | ||
| basePath = addPath; // No need to clone, we've pulled it from the list | ||
| basePath.newPos++; | ||
| self.pushComponent(basePath.components, true, undefined); | ||
| basePath = self.addToPath(removePath, undefined, true, 1); | ||
| } | ||
| _oldPos = self.extractCommon(basePath, newString, oldString, diagonalPath); // If we have hit the end of both strings, then we are done | ||
| newPos = self.extractCommon(basePath, newString, oldString, diagonalPath); | ||
| if (basePath.newPos + 1 >= newLen && _oldPos + 1 >= oldLen) { | ||
| return done(buildValues(self, basePath.components, newString, oldString, self.useLongestToken)); | ||
| if (basePath.oldPos + 1 >= oldLen && newPos + 1 >= newLen) { | ||
| // If we have hit the end of both strings, then we are done | ||
| return done(buildValues(self, basePath.lastComponent, newString, oldString, self.useLongestToken)); | ||
| } else { | ||
| // Otherwise track this path as a potential candidate and continue. | ||
| bestPath[diagonalPath] = basePath; | ||
| if (basePath.oldPos + 1 >= oldLen) { | ||
| maxDiagonalToConsider = Math.min(maxDiagonalToConsider, diagonalPath - 1); | ||
| } | ||
| if (newPos + 1 >= newLen) { | ||
| minDiagonalToConsider = Math.max(minDiagonalToConsider, diagonalPath + 1); | ||
| } | ||
| } | ||
@@ -115,3 +149,3 @@ } | ||
| setTimeout(function () { | ||
| if (editLength > maxEditLength) { | ||
| if (editLength > maxEditLength || Date.now() > abortAfterTimestamp) { | ||
| return callback(); | ||
@@ -126,3 +160,3 @@ } | ||
| } else { | ||
| while (editLength <= maxEditLength) { | ||
| while (editLength <= maxEditLength && Date.now() <= abortAfterTimestamp) { | ||
| var ret = execEditLength(); | ||
@@ -136,19 +170,25 @@ | ||
| }, | ||
| pushComponent: function pushComponent(components, added, removed) { | ||
| var last = components[components.length - 1]; | ||
| addToPath: function addToPath(path, added, removed, oldPosInc) { | ||
| var last = path.lastComponent; | ||
| if (last && last.added === added && last.removed === removed) { | ||
| // We need to clone here as the component clone operation is just | ||
| // as shallow array clone | ||
| components[components.length - 1] = { | ||
| count: last.count + 1, | ||
| added: added, | ||
| removed: removed | ||
| return { | ||
| oldPos: path.oldPos + oldPosInc, | ||
| lastComponent: { | ||
| count: last.count + 1, | ||
| added: added, | ||
| removed: removed, | ||
| previousComponent: last.previousComponent | ||
| } | ||
| }; | ||
| } else { | ||
| components.push({ | ||
| count: 1, | ||
| added: added, | ||
| removed: removed | ||
| }); | ||
| return { | ||
| oldPos: path.oldPos + oldPosInc, | ||
| lastComponent: { | ||
| count: 1, | ||
| added: added, | ||
| removed: removed, | ||
| previousComponent: last | ||
| } | ||
| }; | ||
| } | ||
@@ -159,4 +199,4 @@ }, | ||
| oldLen = oldString.length, | ||
| newPos = basePath.newPos, | ||
| oldPos = newPos - diagonalPath, | ||
| oldPos = basePath.oldPos, | ||
| newPos = oldPos - diagonalPath, | ||
| commonCount = 0; | ||
@@ -171,9 +211,10 @@ | ||
| if (commonCount) { | ||
| basePath.components.push({ | ||
| count: commonCount | ||
| }); | ||
| basePath.lastComponent = { | ||
| count: commonCount, | ||
| previousComponent: basePath.lastComponent | ||
| }; | ||
| } | ||
| basePath.newPos = newPos; | ||
| return oldPos; | ||
| basePath.oldPos = oldPos; | ||
| return newPos; | ||
| }, | ||
@@ -209,3 +250,16 @@ equals: function equals(left, right) { | ||
| function buildValues(diff, components, newString, oldString, useLongestToken) { | ||
| function buildValues(diff, lastComponent, newString, oldString, useLongestToken) { | ||
| // First we convert our linked list of components in reverse order to an | ||
| // array in the right order: | ||
| var components = []; | ||
| var nextComponent; | ||
| while (lastComponent) { | ||
| components.push(lastComponent); | ||
| nextComponent = lastComponent.previousComponent; | ||
| delete lastComponent.previousComponent; | ||
| lastComponent = nextComponent; | ||
| } | ||
| components.reverse(); | ||
| var componentPos = 0, | ||
@@ -253,6 +307,6 @@ componentLen = components.length, | ||
| var lastComponent = components[componentLen - 1]; | ||
| var finalComponent = components[componentLen - 1]; | ||
| if (componentLen > 1 && typeof lastComponent.value === 'string' && (lastComponent.added || lastComponent.removed) && diff.equals('', lastComponent.value)) { | ||
| components[componentLen - 2].value += lastComponent.value; | ||
| if (componentLen > 1 && typeof finalComponent.value === 'string' && (finalComponent.added || finalComponent.removed) && diff.equals('', finalComponent.value)) { | ||
| components[componentLen - 2].value += finalComponent.value; | ||
| components.pop(); | ||
@@ -264,9 +318,2 @@ } | ||
| function clonePath(path) { | ||
| return { | ||
| newPos: path.newPos, | ||
| components: path.components.slice(0) | ||
| }; | ||
| } | ||
| var characterDiff = new Diff(); | ||
@@ -352,2 +399,7 @@ function diffChars(oldStr, newStr, options) { | ||
| lineDiff.tokenize = function (value) { | ||
| if (this.options.stripTrailingCr) { | ||
| // remove one \r before \n to match GNU diff's --strip-trailing-cr behavior | ||
| value = value.replace(/\r\n/g, '\n'); | ||
| } | ||
| var retLines = [], | ||
@@ -424,2 +476,51 @@ linesAndNewlines = value.split(/(\n|\r\n)/); // Ignore the final empty token that occurs if the string ends with a new line | ||
| function _defineProperty(obj, key, value) { | ||
| if (key in obj) { | ||
| Object.defineProperty(obj, key, { | ||
| value: value, | ||
| enumerable: true, | ||
| configurable: true, | ||
| writable: true | ||
| }); | ||
| } else { | ||
| obj[key] = value; | ||
| } | ||
| return obj; | ||
| } | ||
| function ownKeys(object, enumerableOnly) { | ||
| var keys = Object.keys(object); | ||
| if (Object.getOwnPropertySymbols) { | ||
| var symbols = Object.getOwnPropertySymbols(object); | ||
| if (enumerableOnly) symbols = symbols.filter(function (sym) { | ||
| return Object.getOwnPropertyDescriptor(object, sym).enumerable; | ||
| }); | ||
| keys.push.apply(keys, symbols); | ||
| } | ||
| return keys; | ||
| } | ||
| function _objectSpread2(target) { | ||
| for (var i = 1; i < arguments.length; i++) { | ||
| var source = arguments[i] != null ? arguments[i] : {}; | ||
| if (i % 2) { | ||
| ownKeys(Object(source), true).forEach(function (key) { | ||
| _defineProperty(target, key, source[key]); | ||
| }); | ||
| } else if (Object.getOwnPropertyDescriptors) { | ||
| Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); | ||
| } else { | ||
| ownKeys(Object(source)).forEach(function (key) { | ||
| Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); | ||
| }); | ||
| } | ||
| } | ||
| return target; | ||
| } | ||
| function _toConsumableArray(arr) { | ||
@@ -857,3 +958,3 @@ return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); | ||
| content = line.length > 0 ? line.substr(1) : line, | ||
| delimiter = _hunk.linedelimiters[j]; | ||
| delimiter = _hunk.linedelimiters && _hunk.linedelimiters[j] || '\n'; | ||
@@ -1065,2 +1166,6 @@ if (operation === ' ') { | ||
| function formatPatch(diff) { | ||
| if (Array.isArray(diff)) { | ||
| return diff.map(formatPatch).join('\n'); | ||
| } | ||
| var ret = []; | ||
@@ -1521,2 +1626,35 @@ | ||
| function reversePatch(structuredPatch) { | ||
| if (Array.isArray(structuredPatch)) { | ||
| return structuredPatch.map(reversePatch).reverse(); | ||
| } | ||
| return _objectSpread2(_objectSpread2({}, structuredPatch), {}, { | ||
| oldFileName: structuredPatch.newFileName, | ||
| oldHeader: structuredPatch.newHeader, | ||
| newFileName: structuredPatch.oldFileName, | ||
| newHeader: structuredPatch.oldHeader, | ||
| hunks: structuredPatch.hunks.map(function (hunk) { | ||
| return { | ||
| oldLines: hunk.newLines, | ||
| oldStart: hunk.newStart, | ||
| newLines: hunk.oldLines, | ||
| newStart: hunk.oldStart, | ||
| linedelimiters: hunk.linedelimiters, | ||
| lines: hunk.lines.map(function (l) { | ||
| if (l.startsWith('-')) { | ||
| return "+".concat(l.slice(1)); | ||
| } | ||
| if (l.startsWith('+')) { | ||
| return "-".concat(l.slice(1)); | ||
| } | ||
| return l; | ||
| }) | ||
| }; | ||
| }) | ||
| }); | ||
| } | ||
| // See: http://code.google.com/p/google-diff-match-patch/wiki/API | ||
@@ -1578,2 +1716,2 @@ function convertChangesToDMP(changes) { | ||
| export { Diff, applyPatch, applyPatches, canonicalize, convertChangesToDMP, convertChangesToXML, createPatch, createTwoFilesPatch, diffArrays, diffChars, diffCss, diffJson, diffLines, diffSentences, diffTrimmedLines, diffWords, diffWordsWithSpace, merge, parsePatch, structuredPatch }; | ||
| export { Diff, applyPatch, applyPatches, canonicalize, convertChangesToDMP, convertChangesToXML, createPatch, createTwoFilesPatch, diffArrays, diffChars, diffCss, diffJson, diffLines, diffSentences, diffTrimmedLines, diffWords, diffWordsWithSpace, formatPatch, merge, parsePatch, reversePatch, structuredPatch }; |
@@ -97,2 +97,8 @@ /*istanbul ignore start*/ | ||
| }); | ||
| Object.defineProperty(exports, "reversePatch", { | ||
| enumerable: true, | ||
| get: function get() { | ||
| return _reverse.reversePatch; | ||
| } | ||
| }); | ||
| Object.defineProperty(exports, "structuredPatch", { | ||
@@ -116,2 +122,8 @@ enumerable: true, | ||
| }); | ||
| Object.defineProperty(exports, "formatPatch", { | ||
| enumerable: true, | ||
| get: function get() { | ||
| return _create.formatPatch; | ||
| } | ||
| }); | ||
| Object.defineProperty(exports, "convertChangesToDMP", { | ||
@@ -199,2 +211,8 @@ enumerable: true, | ||
| /*istanbul ignore start*/ | ||
| _reverse = require("./patch/reverse") | ||
| /*istanbul ignore end*/ | ||
| ; | ||
| var | ||
| /*istanbul ignore start*/ | ||
| _create = require("./patch/create") | ||
@@ -219,2 +237,2 @@ /*istanbul ignore end*/ | ||
| /*istanbul ignore end*/ | ||
| //# sourceMappingURL=data:application/json;charset=utf-8;base64,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 | ||
| //# sourceMappingURL=data:application/json;charset=utf-8;base64,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 |
@@ -151,3 +151,3 @@ /*istanbul ignore start*/ | ||
| content = line.length > 0 ? line.substr(1) : line, | ||
| delimiter = _hunk.linedelimiters[j]; | ||
| delimiter = _hunk.linedelimiters && _hunk.linedelimiters[j] || '\n'; | ||
@@ -239,2 +239,2 @@ if (operation === ' ') { | ||
| } | ||
| //# 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0; j < hunk.lines.length; j++) {\n      let line = hunk.lines[j],\n          operation = (line.length > 0 ? line[0] : ' '),\n          content = (line.length > 0 ? line.substr(1) : line);\n\n      if (operation === ' ' || operation === '-') {\n        // Context sanity check\n        if (!compareLine(toPos + 1, lines[toPos], operation, content)) {\n          errorCount++;\n\n          if (errorCount > fuzzFactor) {\n            return false;\n          }\n        }\n        toPos++;\n      }\n    }\n\n    return true;\n  }\n\n  // Search best fit offsets for each hunk based on the previous ones\n  for (let i = 0; i < hunks.length; i++) {\n    let hunk = hunks[i],\n        maxLine = lines.length - hunk.oldLines,\n        localOffset = 0,\n        toPos = offset + hunk.oldStart - 1;\n\n    let iterator = distanceIterator(toPos, minLine, maxLine);\n\n    for (; localOffset !== undefined; localOffset = iterator()) {\n      if (hunkFits(hunk, toPos + localOffset)) {\n        hunk.offset = offset += localOffset;\n        break;\n      }\n    }\n\n    if (localOffset === undefined) {\n      return false;\n    }\n\n    // Set lower text limit to end of the current hunk, so next ones don't try\n    // to fit over already patched text\n    minLine = hunk.offset + hunk.oldStart + hunk.oldLines;\n  }\n\n  // Apply patch hunks\n  let diffOffset = 0;\n  for (let i = 0; i < hunks.length; i++) {\n    let hunk = hunks[i],\n        toPos = hunk.oldStart + hunk.offset + diffOffset - 1;\n    diffOffset += hunk.newLines - hunk.oldLines;\n\n    for (let j = 0; j < hunk.lines.length; j++) {\n      let line = hunk.lines[j],\n          operation = (line.length > 0 ? line[0] : ' '),\n          content = (line.length > 0 ? line.substr(1) : line),\n          delimiter = hunk.linedelimiters[j];\n\n      if (operation === ' ') {\n        toPos++;\n      } else if (operation === '-') {\n        lines.splice(toPos, 1);\n        delimiters.splice(toPos, 1);\n      /* istanbul ignore else */\n      } else if (operation === '+') {\n        lines.splice(toPos, 0, content);\n        delimiters.splice(toPos, 0, delimiter);\n        toPos++;\n      } else if (operation === '\\\\') {\n        let previousOperation = hunk.lines[j - 1] ? hunk.lines[j - 1][0] : null;\n        if (previousOperation === '+') {\n          removeEOFNL = true;\n        } else if (previousOperation === '-') {\n          addEOFNL = true;\n        }\n      }\n    }\n  }\n\n  // Handle EOFNL insertion/removal\n  if (removeEOFNL) {\n    while (!lines[lines.length - 1]) {\n      lines.pop();\n      delimiters.pop();\n    }\n  } else if (addEOFNL) {\n    lines.push('');\n    delimiters.push('\\n');\n  }\n  for (let _k = 0; _k < lines.length - 1; _k++) {\n    lines[_k] = lines[_k] + delimiters[_k];\n  }\n  return lines.join('');\n}\n\n// Wrapper that supports multiple file patches via callbacks.\nexport function applyPatches(uniDiff, options) {\n  if (typeof uniDiff === 'string') {\n    uniDiff = parsePatch(uniDiff);\n  }\n\n  let currentIndex = 0;\n  function processIndex() {\n    let index = uniDiff[currentIndex++];\n    if (!index) {\n      return options.complete();\n    }\n\n    options.loadFile(index, function(err, data) {\n      if (err) {\n        return options.complete(err);\n      }\n\n      let updatedContent = applyPatch(data, index, options);\n      options.patched(index, updatedContent, function(err) {\n        if (err) {\n          return options.complete(err);\n        }\n\n        processIndex();\n      });\n    });\n  }\n  processIndex();\n}\n"]} | ||
| //# 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{parsePatch} from './parse';\nimport distanceIterator from '../util/distance-iterator';\n\nexport function applyPatch(source, uniDiff, options = {}) {\n  if (typeof uniDiff === 'string') {\n    uniDiff = parsePatch(uniDiff);\n  }\n\n  if (Array.isArray(uniDiff)) {\n    if (uniDiff.length > 1) {\n      throw new Error('applyPatch only works with a single input.');\n    }\n\n    uniDiff = uniDiff[0];\n  }\n\n  // Apply the diff to the input\n  let lines = source.split(/\\r\\n|[\\n\\v\\f\\r\\x85]/),\n      delimiters = source.match(/\\r\\n|[\\n\\v\\f\\r\\x85]/g) || [],\n      hunks = uniDiff.hunks,\n\n      compareLine = options.compareLine || ((lineNumber, line, operation, patchContent) => line === patchContent),\n      errorCount = 0,\n      fuzzFactor = options.fuzzFactor || 0,\n      minLine = 0,\n      offset = 0,\n\n      removeEOFNL,\n      addEOFNL;\n\n  /**\n   * Checks if the hunk exactly fits on the provided location\n   */\n  function hunkFits(hunk, toPos) {\n    for (let j = 0; j < hunk.lines.length; j++) {\n      let line = hunk.lines[j],\n          operation = (line.length > 0 ? line[0] : ' '),\n          content = (line.length > 0 ? line.substr(1) : line);\n\n      if (operation === ' ' || operation === '-') {\n        // Context sanity check\n        if (!compareLine(toPos + 1, lines[toPos], operation, content)) {\n          errorCount++;\n\n          if (errorCount > fuzzFactor) {\n            return false;\n          }\n        }\n        toPos++;\n      }\n    }\n\n    return true;\n  }\n\n  // Search best fit offsets for each hunk based on the previous ones\n  for (let i = 0; i < hunks.length; i++) {\n    let hunk = hunks[i],\n        maxLine = lines.length - hunk.oldLines,\n        localOffset = 0,\n        toPos = offset + hunk.oldStart - 1;\n\n    let iterator = distanceIterator(toPos, minLine, maxLine);\n\n    for (; localOffset !== undefined; localOffset = iterator()) {\n      if (hunkFits(hunk, toPos + localOffset)) {\n        hunk.offset = offset += localOffset;\n        break;\n      }\n    }\n\n    if (localOffset === undefined) {\n      return false;\n    }\n\n    // Set lower text limit to end of the current hunk, so next ones don't try\n    // to fit over already patched text\n    minLine = hunk.offset + hunk.oldStart + hunk.oldLines;\n  }\n\n  // Apply patch hunks\n  let diffOffset = 0;\n  for (let i = 0; i < hunks.length; i++) {\n    let hunk = hunks[i],\n        toPos = hunk.oldStart + hunk.offset + diffOffset - 1;\n    diffOffset += hunk.newLines - hunk.oldLines;\n\n    for (let j = 0; j < hunk.lines.length; j++) {\n      let line = hunk.lines[j],\n          operation = (line.length > 0 ? line[0] : ' '),\n          content = (line.length > 0 ? line.substr(1) : line),\n          delimiter = hunk.linedelimiters && hunk.linedelimiters[j] || '\\n';\n\n      if (operation === ' ') {\n        toPos++;\n      } else if (operation === '-') {\n        lines.splice(toPos, 1);\n        delimiters.splice(toPos, 1);\n      /* istanbul ignore else */\n      } else if (operation === '+') {\n        lines.splice(toPos, 0, content);\n        delimiters.splice(toPos, 0, delimiter);\n        toPos++;\n      } else if (operation === '\\\\') {\n        let previousOperation = hunk.lines[j - 1] ? hunk.lines[j - 1][0] : null;\n        if (previousOperation === '+') {\n          removeEOFNL = true;\n        } else if (previousOperation === '-') {\n          addEOFNL = true;\n        }\n      }\n    }\n  }\n\n  // Handle EOFNL insertion/removal\n  if (removeEOFNL) {\n    while (!lines[lines.length - 1]) {\n      lines.pop();\n      delimiters.pop();\n    }\n  } else if (addEOFNL) {\n    lines.push('');\n    delimiters.push('\\n');\n  }\n  for (let _k = 0; _k < lines.length - 1; _k++) {\n    lines[_k] = lines[_k] + delimiters[_k];\n  }\n  return lines.join('');\n}\n\n// Wrapper that supports multiple file patches via callbacks.\nexport function applyPatches(uniDiff, options) {\n  if (typeof uniDiff === 'string') {\n    uniDiff = parsePatch(uniDiff);\n  }\n\n  let currentIndex = 0;\n  function processIndex() {\n    let index = uniDiff[currentIndex++];\n    if (!index) {\n      return options.complete();\n    }\n\n    options.loadFile(index, function(err, data) {\n      if (err) {\n        return options.complete(err);\n      }\n\n      let updatedContent = applyPatch(data, index, options);\n      options.patched(index, updatedContent, function(err) {\n        if (err) {\n          return options.complete(err);\n        }\n\n        processIndex();\n      });\n    });\n  }\n  processIndex();\n}\n"]} |
@@ -235,2 +235,6 @@ /*istanbul ignore start*/ | ||
| function formatPatch(diff) { | ||
| if (Array.isArray(diff)) { | ||
| return diff.map(formatPatch).join('\n'); | ||
| } | ||
| var ret = []; | ||
@@ -273,2 +277,2 @@ | ||
| } | ||
| //# 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{diffLines} from '../diff/line';\n\nexport function structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {\n  if (!options) {\n    options = {};\n  }\n  if (typeof options.context === 'undefined') {\n    options.context = 4;\n  }\n\n  const diff = diffLines(oldStr, newStr, options);\n  if(!diff) {\n    return;\n  }\n\n  diff.push({value: '', lines: []}); // Append an empty value to make cleanup easier\n\n  function contextLines(lines) {\n    return lines.map(function(entry) { return ' ' + entry; });\n  }\n\n  let hunks = [];\n  let oldRangeStart = 0, newRangeStart = 0, curRange = [],\n      oldLine = 1, newLine = 1;\n  for (let i = 0; i < diff.length; i++) {\n    const current = diff[i],\n          lines = current.lines || current.value.replace(/\\n$/, '').split('\\n');\n    current.lines = lines;\n\n    if (current.added || current.removed) {\n      // If we have previous context, start with that\n      if (!oldRangeStart) {\n        const prev = diff[i - 1];\n        oldRangeStart = oldLine;\n        newRangeStart = newLine;\n\n        if (prev) {\n          curRange = options.context > 0 ? contextLines(prev.lines.slice(-options.context)) : [];\n          oldRangeStart -= curRange.length;\n          newRangeStart -= curRange.length;\n        }\n      }\n\n      // Output our changes\n      curRange.push(... lines.map(function(entry) {\n        return (current.added ? '+' : '-') + entry;\n      }));\n\n      // Track the updated file position\n      if (current.added) {\n        newLine += lines.length;\n      } else {\n        oldLine += lines.length;\n      }\n    } else {\n      // Identical context lines. Track line changes\n      if (oldRangeStart) {\n        // Close out any changes that have been output (or join overlapping)\n        if (lines.length <= options.context * 2 && i < diff.length - 2) {\n          // Overlapping\n          curRange.push(... contextLines(lines));\n        } else {\n          // end the range and output\n          let contextSize = Math.min(lines.length, options.context);\n          curRange.push(... contextLines(lines.slice(0, contextSize)));\n\n          let hunk = {\n            oldStart: oldRangeStart,\n            oldLines: (oldLine - oldRangeStart + contextSize),\n            newStart: newRangeStart,\n            newLines: (newLine - newRangeStart + contextSize),\n            lines: curRange\n          };\n          if (i >= diff.length - 2 && lines.length <= options.context) {\n            // EOF is inside this hunk\n            let oldEOFNewline = ((/\\n$/).test(oldStr));\n            let newEOFNewline = ((/\\n$/).test(newStr));\n            let noNlBeforeAdds = lines.length == 0 && curRange.length > hunk.oldLines;\n            if (!oldEOFNewline && noNlBeforeAdds && oldStr.length > 0) {\n              // special case: old has no eol and no trailing context; no-nl can end up before adds\n              // however, if the old file is empty, do not output the no-nl line\n              curRange.splice(hunk.oldLines, 0, '\\\\ No newline at end of file');\n            }\n            if ((!oldEOFNewline && !noNlBeforeAdds) || !newEOFNewline) {\n              curRange.push('\\\\ No newline at end of file');\n            }\n          }\n          hunks.push(hunk);\n\n          oldRangeStart = 0;\n          newRangeStart = 0;\n          curRange = [];\n        }\n      }\n      oldLine += lines.length;\n      newLine += lines.length;\n    }\n  }\n\n  return {\n    oldFileName: oldFileName, newFileName: newFileName,\n    oldHeader: oldHeader, newHeader: newHeader,\n    hunks: hunks\n  };\n}\n\nexport function formatPatch(diff) {\n  const ret = [];\n  if (diff.oldFileName == diff.newFileName) {\n    ret.push('Index: ' + diff.oldFileName);\n  }\n  ret.push('===================================================================');\n  ret.push('--- ' + diff.oldFileName + (typeof diff.oldHeader === 'undefined' ? '' : '\\t' + diff.oldHeader));\n  ret.push('+++ ' + diff.newFileName + (typeof diff.newHeader === 'undefined' ? '' : '\\t' + diff.newHeader));\n\n  for (let i = 0; i < diff.hunks.length; i++) {\n    const hunk = diff.hunks[i];\n    // Unified Diff Format quirk: If the chunk size is 0,\n    // the first number is one lower than one would expect.\n    // https://www.artima.com/weblogs/viewpost.jsp?thread=164293\n    if (hunk.oldLines === 0) {\n      hunk.oldStart -= 1;\n    }\n    if (hunk.newLines === 0) {\n      hunk.newStart -= 1;\n    }\n    ret.push(\n      '@@ -' + hunk.oldStart + ',' + hunk.oldLines\n      + ' +' + hunk.newStart + ',' + hunk.newLines\n      + ' @@'\n    );\n    ret.push.apply(ret, hunk.lines);\n  }\n\n  return ret.join('\\n') + '\\n';\n}\n\nexport function createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {\n  return formatPatch(structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options));\n}\n\nexport function createPatch(fileName, oldStr, newStr, oldHeader, newHeader, options) {\n  return createTwoFilesPatch(fileName, fileName, oldStr, newStr, oldHeader, newHeader, options);\n}\n"]} | ||
| //# 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{diffLines} from '../diff/line';\n\nexport function structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {\n  if (!options) {\n    options = {};\n  }\n  if (typeof options.context === 'undefined') {\n    options.context = 4;\n  }\n\n  const diff = diffLines(oldStr, newStr, options);\n  if(!diff) {\n    return;\n  }\n\n  diff.push({value: '', lines: []}); // Append an empty value to make cleanup easier\n\n  function contextLines(lines) {\n    return lines.map(function(entry) { return ' ' + entry; });\n  }\n\n  let hunks = [];\n  let oldRangeStart = 0, newRangeStart = 0, curRange = [],\n      oldLine = 1, newLine = 1;\n  for (let i = 0; i < diff.length; i++) {\n    const current = diff[i],\n          lines = current.lines || current.value.replace(/\\n$/, '').split('\\n');\n    current.lines = lines;\n\n    if (current.added || current.removed) {\n      // If we have previous context, start with that\n      if (!oldRangeStart) {\n        const prev = diff[i - 1];\n        oldRangeStart = oldLine;\n        newRangeStart = newLine;\n\n        if (prev) {\n          curRange = options.context > 0 ? contextLines(prev.lines.slice(-options.context)) : [];\n          oldRangeStart -= curRange.length;\n          newRangeStart -= curRange.length;\n        }\n      }\n\n      // Output our changes\n      curRange.push(... lines.map(function(entry) {\n        return (current.added ? '+' : '-') + entry;\n      }));\n\n      // Track the updated file position\n      if (current.added) {\n        newLine += lines.length;\n      } else {\n        oldLine += lines.length;\n      }\n    } else {\n      // Identical context lines. Track line changes\n      if (oldRangeStart) {\n        // Close out any changes that have been output (or join overlapping)\n        if (lines.length <= options.context * 2 && i < diff.length - 2) {\n          // Overlapping\n          curRange.push(... contextLines(lines));\n        } else {\n          // end the range and output\n          let contextSize = Math.min(lines.length, options.context);\n          curRange.push(... contextLines(lines.slice(0, contextSize)));\n\n          let hunk = {\n            oldStart: oldRangeStart,\n            oldLines: (oldLine - oldRangeStart + contextSize),\n            newStart: newRangeStart,\n            newLines: (newLine - newRangeStart + contextSize),\n            lines: curRange\n          };\n          if (i >= diff.length - 2 && lines.length <= options.context) {\n            // EOF is inside this hunk\n            let oldEOFNewline = ((/\\n$/).test(oldStr));\n            let newEOFNewline = ((/\\n$/).test(newStr));\n            let noNlBeforeAdds = lines.length == 0 && curRange.length > hunk.oldLines;\n            if (!oldEOFNewline && noNlBeforeAdds && oldStr.length > 0) {\n              // special case: old has no eol and no trailing context; no-nl can end up before adds\n              // however, if the old file is empty, do not output the no-nl line\n              curRange.splice(hunk.oldLines, 0, '\\\\ No newline at end of file');\n            }\n            if ((!oldEOFNewline && !noNlBeforeAdds) || !newEOFNewline) {\n              curRange.push('\\\\ No newline at end of file');\n            }\n          }\n          hunks.push(hunk);\n\n          oldRangeStart = 0;\n          newRangeStart = 0;\n          curRange = [];\n        }\n      }\n      oldLine += lines.length;\n      newLine += lines.length;\n    }\n  }\n\n  return {\n    oldFileName: oldFileName, newFileName: newFileName,\n    oldHeader: oldHeader, newHeader: newHeader,\n    hunks: hunks\n  };\n}\n\nexport function formatPatch(diff) {\n  if (Array.isArray(diff)) {\n    return diff.map(formatPatch).join('\\n');\n  }\n\n  const ret = [];\n  if (diff.oldFileName == diff.newFileName) {\n    ret.push('Index: ' + diff.oldFileName);\n  }\n  ret.push('===================================================================');\n  ret.push('--- ' + diff.oldFileName + (typeof diff.oldHeader === 'undefined' ? '' : '\\t' + diff.oldHeader));\n  ret.push('+++ ' + diff.newFileName + (typeof diff.newHeader === 'undefined' ? '' : '\\t' + diff.newHeader));\n\n  for (let i = 0; i < diff.hunks.length; i++) {\n    const hunk = diff.hunks[i];\n    // Unified Diff Format quirk: If the chunk size is 0,\n    // the first number is one lower than one would expect.\n    // https://www.artima.com/weblogs/viewpost.jsp?thread=164293\n    if (hunk.oldLines === 0) {\n      hunk.oldStart -= 1;\n    }\n    if (hunk.newLines === 0) {\n      hunk.newStart -= 1;\n    }\n    ret.push(\n      '@@ -' + hunk.oldStart + ',' + hunk.oldLines\n      + ' +' + hunk.newStart + ',' + hunk.newLines\n      + ' @@'\n    );\n    ret.push.apply(ret, hunk.lines);\n  }\n\n  return ret.join('\\n') + '\\n';\n}\n\nexport function createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {\n  return formatPatch(structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options));\n}\n\nexport function createPatch(fileName, oldStr, newStr, oldHeader, newHeader, options) {\n  return createTwoFilesPatch(fileName, fileName, oldStr, newStr, oldHeader, newHeader, options);\n}\n"]} |
| { | ||
| "name": "diff", | ||
| "version": "5.1.0", | ||
| "description": "A javascript text diff implementation.", | ||
| "version": "5.2.0", | ||
| "description": "A JavaScript text diff implementation.", | ||
| "keywords": [ | ||
@@ -16,3 +16,4 @@ "diff", | ||
| "maintainers": [ | ||
| "Kevin Decker <kpdecker@gmail.com> (http://incaseofstairs.com)" | ||
| "Kevin Decker <kpdecker@gmail.com> (http://incaseofstairs.com)", | ||
| "Mark Amery <markrobertamery+jsdiff@gmail.com>" | ||
| ], | ||
@@ -41,3 +42,4 @@ "bugs": { | ||
| "./package.json": "./package.json", | ||
| "./": "./" | ||
| "./": "./", | ||
| "./*": "./*" | ||
| }, | ||
@@ -55,6 +57,6 @@ "scripts": { | ||
| "@babel/register": "^7.0.0", | ||
| "@colors/colors": "^1.3.3", | ||
| "babel-eslint": "^10.0.1", | ||
| "babel-loader": "^8.0.5", | ||
| "chai": "^4.2.0", | ||
| "colors": "^1.3.3", | ||
| "eslint": "^5.12.0", | ||
@@ -75,3 +77,3 @@ "grunt": "^1.0.3", | ||
| "istanbul": "github:kpdecker/istanbul", | ||
| "karma": "^5.1.1", | ||
| "karma": "^6.3.16", | ||
| "karma-chrome-launcher": "^3.1.0", | ||
@@ -78,0 +80,0 @@ "karma-mocha": "^2.0.1", |
218
README.md
@@ -6,6 +6,6 @@ # jsdiff | ||
| A javascript text differencing implementation. | ||
| A JavaScript text differencing implementation. Try it out in the **[online demo](https://kpdecker.github.io/jsdiff)**. | ||
| Based on the algorithm proposed in | ||
| ["An O(ND) Difference Algorithm and its Variations" (Myers, 1986)](http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.4.6927). | ||
| ["An O(ND) Difference Algorithm and its Variations" (Myers, 1986)](http://www.xmailserver.org/diff2.pdf). | ||
@@ -17,47 +17,69 @@ ## Installation | ||
| ## API | ||
| ## Usage | ||
| * `Diff.diffChars(oldStr, newStr[, options])` - diffs two blocks of text, comparing character by character. | ||
| Broadly, jsdiff's diff functions all take an old text and a new text and perform three steps: | ||
| Returns a list of change objects (See below). | ||
| 1. Split both texts into arrays of "tokens". What constitutes a token varies; in `diffChars`, each character is a token, while in `diffLines`, each line is a token. | ||
| Options | ||
| * `ignoreCase`: `true` to ignore casing difference. Defaults to `false`. | ||
| 2. Find the smallest set of single-token *insertions* and *deletions* needed to transform the first array of tokens into the second. | ||
| * `Diff.diffWords(oldStr, newStr[, options])` - diffs two blocks of text, comparing word by word, ignoring whitespace. | ||
| This step depends upon having some notion of a token from the old array being "equal" to one from the new array, and this notion of equality affects the results. Usually two tokens are equal if `===` considers them equal, but some of the diff functions use an alternative notion of equality or have options to configure it. For instance, by default `diffChars("Foo", "FOOD")` will require two deletions (`o`, `o`) and three insertions (`O`, `O`, `D`), but `diffChars("Foo", "FOOD", {ignoreCase: true})` will require just one insertion (of a `D`), since `ignoreCase` causes `o` and `O` to be considered equal. | ||
| Returns a list of change objects (See below). | ||
| 3. Return an array representing the transformation computed in the previous step as a series of [change objects](#change-objects). The array is ordered from the start of the input to the end, and each change object represents *inserting* one or more tokens, *deleting* one or more tokens, or *keeping* one or more tokens. | ||
| ### API | ||
| * `Diff.diffChars(oldStr, newStr[, options])` - diffs two blocks of text, treating each character as a token. | ||
| Returns a list of [change objects](#change-objects). | ||
| Options | ||
| * `ignoreCase`: Same as in `diffChars`. | ||
| * `ignoreCase`: If `true`, the uppercase and lowercase forms of a character are considered equal. Defaults to `false`. | ||
| * `Diff.diffWordsWithSpace(oldStr, newStr[, options])` - diffs two blocks of text, comparing word by word, treating whitespace as significant. | ||
| * `Diff.diffWords(oldStr, newStr[, options])` - diffs two blocks of text, treating each word and each word separator (punctuation, newline, or run of whitespace) as a token. | ||
| Returns a list of change objects (See below). | ||
| (Whitespace-only tokens are automatically treated as equal to each other, so changes like changing a space to a newline or a run of multiple spaces will be ignored.) | ||
| * `Diff.diffLines(oldStr, newStr[, options])` - diffs two blocks of text, comparing line by line. | ||
| Returns a list of [change objects](#change-objects). | ||
| Options | ||
| * `ignoreWhitespace`: `true` to ignore leading and trailing whitespace. This is the same as `diffTrimmedLines` | ||
| * `newlineIsToken`: `true` to treat newline characters as separate tokens. This allows for changes to the newline structure to occur independently of the line content and to be treated as such. In general this is the more human friendly form of `diffLines` and `diffLines` is better suited for patches and other computer friendly output. | ||
| * `ignoreCase`: Same as in `diffChars`. Defaults to false. | ||
| Returns a list of change objects (See below). | ||
| * `Diff.diffWordsWithSpace(oldStr, newStr[, options])` - same as `diffWords`, except whitespace-only tokens are not automatically considered equal, so e.g. changing a space to a tab is considered a change. | ||
| * `Diff.diffTrimmedLines(oldStr, newStr[, options])` - diffs two blocks of text, comparing line by line, ignoring leading and trailing whitespace. | ||
| * `Diff.diffLines(oldStr, newStr[, options])` - diffs two blocks of text, treating each line as a token. | ||
| Returns a list of change objects (See below). | ||
| Options | ||
| * `ignoreWhitespace`: `true` to strip all leading and trailing whitespace characters from each line before performing the diff. Defaults to `false`. | ||
| * `stripTrailingCr`: `true` to remove all trailing CR (`\r`) characters before performing the diff. Defaults to `false`. | ||
| This helps to get a useful diff when diffing UNIX text files against Windows text files. | ||
| * `newlineIsToken`: `true` to treat the newline character at the end of each line as its own token. This allows for changes to the newline structure to occur independently of the line content and to be treated as such. In general this is the more human friendly form of `diffLines`; the default behavior with this option turned off is better suited for patches and other computer friendly output. Defaults to `false`. | ||
| * `Diff.diffSentences(oldStr, newStr[, options])` - diffs two blocks of text, comparing sentence by sentence. | ||
| Returns a list of [change objects](#change-objects). | ||
| Returns a list of change objects (See below). | ||
| * `Diff.diffTrimmedLines(oldStr, newStr[, options])` - diffs two blocks of text, comparing line by line, after stripping leading and trailing whitespace. Equivalent to calling `diffLines` with `ignoreWhitespace: true`. | ||
| Options | ||
| * `stripTrailingCr`: Same as in `diffLines`. Defaults to `false`. | ||
| * `newlineIsToken`: Same as in `diffLines`. Defaults to `false`. | ||
| Returns a list of [change objects](#change-objects). | ||
| * `Diff.diffSentences(oldStr, newStr[, options])` - diffs two blocks of text, treating each sentence as a token. | ||
| Returns a list of [change objects](#change-objects). | ||
| * `Diff.diffCss(oldStr, newStr[, options])` - diffs two blocks of text, comparing CSS tokens. | ||
| Returns a list of change objects (See below). | ||
| Returns a list of [change objects](#change-objects). | ||
| * `Diff.diffJson(oldObj, newObj[, options])` - diffs two JSON objects, comparing the fields defined on each. The order of fields, etc does not matter in this comparison. | ||
| * `Diff.diffJson(oldObj, newObj[, options])` - diffs two JSON-serializable objects by first serializing them to prettily-formatted JSON and then treating each line of the JSON as a token. Object properties are ordered alphabetically in the serialized JSON, so the order of properties in the objects being compared doesn't affect the result. | ||
| Returns a list of change objects (See below). | ||
| Returns a list of [change objects](#change-objects). | ||
| Options | ||
| * `stringifyReplacer`: A custom replacer function. Operates similarly to the `replacer` parameter to [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#the_replacer_parameter), but must be a function. | ||
| * `undefinedReplacement`: A value to replace `undefined` with. Ignored if a `stringifyReplacer` is provided. | ||
| * `Diff.diffArrays(oldArr, newArr[, options])` - diffs two arrays, comparing each item for strict equality (===). | ||
| * `Diff.diffArrays(oldArr, newArr[, options])` - diffs two arrays of tokens, comparing each item for strict equality (===). | ||
@@ -67,5 +89,5 @@ Options | ||
| Returns a list of change objects (See below). | ||
| Returns a list of [change objects](#change-objects). | ||
| * `Diff.createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader)` - creates a unified diff patch. | ||
| * `Diff.createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr[, oldHeader[, newHeader[, options]]])` - creates a unified diff patch by first computing a diff with `diffLines` and then serializing it to unified diff format. | ||
@@ -77,16 +99,20 @@ Parameters: | ||
| * `newStr` : New string value | ||
| * `oldHeader` : Additional information to include in the old file header | ||
| * `newHeader` : Additional information to include in the new file header | ||
| * `oldHeader` : Optional additional information to include in the old file header. Default: `undefined`. | ||
| * `newHeader` : Optional additional information to include in the new file header. Default: `undefined`. | ||
| * `options` : An object with options. | ||
| - `context` describes how many lines of context should be included. | ||
| - `ignoreWhitespace`: `true` to ignore leading and trailing whitespace. | ||
| - `newlineIsToken`: `true` to treat newline characters as separate tokens. This allows for changes to the newline structure to occur independently of the line content and to be treated as such. In general this is the more human friendly form of `diffLines` and `diffLines` is better suited for patches and other computer friendly output. | ||
| - `context` describes how many lines of context should be included. You can set this to `Number.MAX_SAFE_INTEGER` or `Infinity` to include the entire file content in one hunk. | ||
| - `ignoreWhitespace`: Same as in `diffLines`. Defaults to `false`. | ||
| - `stripTrailingCr`: Same as in `diffLines`. Defaults to `false`. | ||
| - `newlineIsToken`: Same as in `diffLines`. Defaults to `false`. | ||
| * `Diff.createPatch(fileName, oldStr, newStr, oldHeader, newHeader)` - creates a unified diff patch. | ||
| * `Diff.createPatch(fileName, oldStr, newStr[, oldHeader[, newHeader[, options]]])` - creates a unified diff patch. | ||
| Just like Diff.createTwoFilesPatch, but with oldFileName being equal to newFileName. | ||
| * `Diff.formatPatch(patch)` - creates a unified diff patch. | ||
| * `Diff.structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options)` - returns an object with an array of hunk objects. | ||
| `patch` may be either a single structured patch object (as returned by `structuredPatch`) or an array of them (as returned by `parsePatch`). | ||
| * `Diff.structuredPatch(oldFileName, newFileName, oldStr, newStr[, oldHeader[, newHeader[, options]]])` - returns an object with an array of hunk objects. | ||
| This method is similar to createTwoFilesPatch, but returns a data structure | ||
@@ -106,6 +132,8 @@ suitable for further processing. Parameters are the same as createTwoFilesPatch. The data structure returned may look like this: | ||
| * `Diff.applyPatch(source, patch[, options])` - applies a unified diff patch. | ||
| * `Diff.applyPatch(source, patch[, options])` - attempts to apply a unified diff patch. | ||
| Return a string containing new version of provided data. `patch` may be a string diff or the output from the `parsePatch` or `structuredPatch` methods. | ||
| If the patch was applied successfully, returns a string containing the patched text. If the patch could not be applied (because some hunks in the patch couldn't be fitted to the text in `source`), returns false. | ||
| `patch` may be a string diff or the output from the `parsePatch` or `structuredPatch` methods. | ||
| The optional `options` object may have the following keys: | ||
@@ -118,2 +146,4 @@ | ||
| `patch` may be either an array of structured patch objects, or a string representing a patch in unified diff format (which may patch one or more files). | ||
| This method will iterate over the contents of the patch and apply to data provided through callbacks. The general flow for each patch index is: | ||
@@ -130,14 +160,47 @@ | ||
| * `convertChangesToXML(changes)` - converts a list of changes to a serialized XML format | ||
| * `Diff.reversePatch(patch)` - Returns a new structured patch which when applied will undo the original `patch`. | ||
| `patch` may be either a single structured patch object (as returned by `structuredPatch`) or an array of them (as returned by `parsePatch`). | ||
| All methods above which accept the optional `callback` method will run in sync mode when that parameter is omitted and in async mode when supplied. This allows for larger diffs without blocking the event loop. This may be passed either directly as the final parameter or as the `callback` field in the `options` object. | ||
| * `Diff.convertChangesToXML(changes)` - converts a list of change objects to a serialized XML format | ||
| * `Diff.convertChangesToDMP(changes)` - converts a list of change objects to the format returned by Google's [diff-match-patch](https://github.com/google/diff-match-patch) library | ||
| #### Universal `options` | ||
| Certain options can be provided in the `options` object of *any* method that calculates a diff: | ||
| * `callback`: if provided, the diff will be computed in async mode to avoid blocking the event loop while the diff is calculated. The value of the `callback` option should be a function and will be passed the result of the diff as its second argument. The first argument will always be undefined. Only works with functions that return change objects, like `diffLines`, not those that return patches, like `structuredPatch` or `createPatch`. | ||
| (Note that if the ONLY option you want to provide is a callback, you can pass the callback function directly as the `options` parameter instead of passing an object with a `callback` property.) | ||
| * `maxEditLength`: a number specifying the maximum edit distance to consider between the old and new texts. If the edit distance is higher than this, jsdiff will return `undefined` instead of a diff. You can use this to limit the computational cost of diffing large, very different texts by giving up early if the cost will be huge. Works for functions that return change objects and also for `structuredPatch`, but not other patch-generation functions. | ||
| * `timeout`: a number of milliseconds after which the diffing algorithm will abort and return `undefined`. Supported by the same functions as `maxEditLength`. | ||
| ### Defining custom diffing behaviors | ||
| If you need behavior a little different to what any of the text diffing functions above offer, you can roll your own by customizing both the tokenization behavior used and the notion of equality used to determine if two tokens are equal. | ||
| The simplest way to customize tokenization behavior is to simply tokenize the texts you want to diff yourself, with your own code, then pass the arrays of tokens to `diffArrays`. For instance, if you wanted a semantically-aware diff of some code, you could try tokenizing it using a parser specific to the programming language the code is in, then passing the arrays of tokens to `diffArrays`. | ||
| To customize the notion of token equality used, use the `comparator` option to `diffArrays`. | ||
| For even more customisation of the diffing behavior, you can create a `new Diff.Diff()` object, overwrite its `castInput`, `tokenize`, `removeEmpty`, `equals`, and `join` properties with your own functions, then call its `diff(oldString, newString[, options])` method. The methods you can overwrite are used as follows: | ||
| * `castInput(value)`: used to transform the `oldString` and `newString` before any other steps in the diffing algorithm happen. For instance, `diffJson` uses `castInput` to serialize the objects being diffed to JSON. Defaults to a no-op. | ||
| * `tokenize(value)`: used to convert each of `oldString` and `newString` (after they've gone through `castInput`) to an array of tokens. Defaults to returning `value.split('')` (returning an array of individual characters). | ||
| * `removeEmpty(array)`: called on the arrays of tokens returned by `tokenize` and can be used to modify them. Defaults to stripping out falsey tokens, such as empty strings. `diffArrays` overrides this to simply return the `array`, which means that falsey values like empty strings can be handled like any other token by `diffArrays`. | ||
| * `equals(left, right)`: called to determine if two tokens (one from the old string, one from the new string) should be considered equal. Defaults to comparing them with `===`. | ||
| * `join(tokens)`: gets called with an array of consecutive tokens that have either all been added, all been removed, or are all common. Needs to join them into a single value that can be used as the `value` property of the [change object](#change-objects) for these tokens. Defaults to simply returning `tokens.join('')`. | ||
| ### Change Objects | ||
| Many of the methods above return change objects. These objects consist of the following fields: | ||
| * `value`: Text content | ||
| * `value`: The concatenated content of all the tokens represented by this change object - i.e. generally the text that is either added, deleted, or common, as a single string. In cases where tokens are considered common but are non-identical (e.g. because an option like `ignoreCase` or a custom `comparator` was used), the value from the *new* string will be provided here. | ||
| * `added`: True if the value was inserted into the new string | ||
| * `removed`: True if the value was removed from the old string | ||
| * `count`: How many tokens (e.g. chars for `diffChars`, lines for `diffLines`) the value in the change object consists of | ||
| (Change objects where `added` and `removed` are both falsey represent content that is common to the old and new strings.) | ||
| Note that some cases may omit a particular flag field. Comparison on the flag fields should always be done in a truthy or falsy manner. | ||
@@ -147,3 +210,3 @@ | ||
| Basic example in Node | ||
| #### Basic example in Node | ||
@@ -161,6 +224,6 @@ ```js | ||
| // green for additions, red for deletions | ||
| // grey for common parts | ||
| const color = part.added ? 'green' : | ||
| part.removed ? 'red' : 'grey'; | ||
| process.stderr.write(part.value[color]); | ||
| let text = part.added ? part.value.bgGreen : | ||
| part.removed ? part.value.bgRed : | ||
| part.value; | ||
| process.stderr.write(text); | ||
| }); | ||
@@ -174,3 +237,3 @@ | ||
| Basic example in a web page | ||
| #### Basic example in a web page | ||
@@ -211,4 +274,62 @@ ```html | ||
| **[Full online demo](https://kpdecker.github.io/jsdiff)** | ||
| #### Example of generating a patch from Node | ||
| The code below is roughly equivalent to the Unix command `diff -u file1.txt file2.txt > mydiff.patch`: | ||
| ``` | ||
| const Diff = require('diff'); | ||
| const file1Contents = fs.readFileSync("file1.txt").toString(); | ||
| const file2Contents = fs.readFileSync("file2.txt").toString(); | ||
| const patch = Diff.createTwoFilesPatch("file1.txt", "file2.txt", file1Contents, file2Contents); | ||
| fs.writeFileSync("mydiff.patch", patch); | ||
| ``` | ||
| #### Examples of parsing and applying a patch from Node | ||
| ##### Applying a patch to a specified file | ||
| The code below is roughly equivalent to the Unix command `patch file1.txt mydiff.patch`: | ||
| ``` | ||
| const Diff = require('diff'); | ||
| const file1Contents = fs.readFileSync("file1.txt").toString(); | ||
| const patch = fs.readFileSync("mydiff.patch").toString(); | ||
| const patchedFile = Diff.applyPatch(file1Contents, patch); | ||
| fs.writeFileSync("file1.txt", patchedFile); | ||
| ``` | ||
| ##### Applying a multi-file patch to the files specified by the patch file itself | ||
| The code below is roughly equivalent to the Unix command `patch < mydiff.patch`: | ||
| ``` | ||
| const Diff = require('diff'); | ||
| const patch = fs.readFileSync("mydiff.patch").toString(); | ||
| Diff.applyPatches(patch, { | ||
| loadFile: (patch, callback) => { | ||
| let fileContents; | ||
| try { | ||
| fileContents = fs.readFileSync(patch.oldFileName).toString(); | ||
| } catch (e) { | ||
| callback(`No such file: ${patch.oldFileName}`); | ||
| return; | ||
| } | ||
| callback(undefined, fileContents); | ||
| }, | ||
| patched: (patch, patchedContent, callback) => { | ||
| if (patchedContent === false) { | ||
| callback(`Failed to apply patch to ${patch.oldFileName}`) | ||
| return; | ||
| } | ||
| fs.writeFileSync(patch.oldFileName, patchedContent); | ||
| callback(); | ||
| }, | ||
| complete: (err) => { | ||
| if (err) { | ||
| console.log("Failed with error:", err); | ||
| } | ||
| } | ||
| }); | ||
| ``` | ||
| ## Compatibility | ||
@@ -223,1 +344,8 @@ | ||
| See [LICENSE](https://github.com/kpdecker/jsdiff/blob/master/LICENSE). | ||
| ## Deviations from the published Myers diff algorithm | ||
| jsdiff deviates from the published algorithm in a couple of ways that don't affect results but do affect performance: | ||
| * jsdiff keeps track of the diff for each diagonal using a linked list of change objects for each diagonal, rather than the historical array of furthest-reaching D-paths on each diagonal contemplated on page 8 of Myers's paper. | ||
| * jsdiff skips considering diagonals where the furthest-reaching D-path would go off the edge of the edit graph. This dramatically reduces the time cost (from quadratic to linear) in cases where the new text just appends or truncates content at the end of the old text. |
| # Release Notes | ||
| ## Development | ||
| ## v5.2.0 | ||
| [Commits](https://github.com/kpdecker/jsdiff/compare/v5.0.0...master) | ||
| [Commits](https://github.com/kpdecker/jsdiff/compare/v5.1.0...master) | ||
| - [#411](https://github.com/kpdecker/jsdiff/pull/411) Big performance improvement. Previously an O(n) array-copying operation inside the innermost loop of jsdiff's base diffing code increased the overall worst-case time complexity of computing a diff from O(n²) to O(n³). This is now fixed, bringing the worst-case time complexity down to what it theoretically should be for a Myers diff implementation. | ||
| - [#448](https://github.com/kpdecker/jsdiff/pull/411) Performance improvement. Diagonals whose furthest-reaching D-path would go off the edge of the edit graph are now skipped, rather than being pointlessly considered as called for by the original Myers diff algorithm. This dramatically speeds up computing diffs where the new text just appends or truncates content at the end of the old text. | ||
| - [#351](https://github.com/kpdecker/jsdiff/issues/351) Importing from the lib folder - e.g. `require("diff/lib/diff/word.js")` - will work again now. This had been broken for users on the latest version of Node since Node 17.5.0, which changed how Node interprets the `exports` property in jsdiff's `package.json` file. | ||
| - [#344](https://github.com/kpdecker/jsdiff/issues/344) `diffLines`, `createTwoFilesPatch`, and other patch-creation methods now take an optional `stripTrailingCr: true` option which causes Windows-style `\r\n` line endings to be replaced with Unix-style `\n` line endings before calculating the diff, just like GNU `diff`'s `--strip-trailing-cr` flag. | ||
| - [#451](https://github.com/kpdecker/jsdiff/pull/451) Added `diff.formatPatch`. | ||
| - [#450](https://github.com/kpdecker/jsdiff/pull/450) Added `diff.reversePatch`. | ||
| - [#478](https://github.com/kpdecker/jsdiff/pull/478) Added `timeout` option. | ||
| ## v5.1.0 | ||
@@ -11,3 +19,3 @@ | ||
| [Commits](https://github.com/kpdecker/jsdiff/compare/v5.0.0...v5.0.1) | ||
| [Commits](https://github.com/kpdecker/jsdiff/compare/v5.0.0...v5.1.0) | ||
@@ -14,0 +22,0 @@ ## v5.0.0 |
Sorry, the diff of this file is not supported yet
Sorry, the diff of this file is not supported yet
New alerts
New author
Supply chain riskA new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.
Found 1 instance in 1 package
Improved metrics
- Total package byte prevSize
- increased by10.17%
429334
- Number of package files
- increased by3.57%
29
- Lines of code
- increased by7.15%
6953
- Number of lines in readme file
- increased by60.38%
340
Worsened metrics
- Number of medium supply chain risk alerts
- increased byInfinity%
1
No dependency changes