Create filter and tests

gh-pages
Matteo Suppo 10 years ago
parent cc0acd247c
commit 2d037b31f2

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'use strict';
angular.module('diff', [])
.filter('diff', function () {
/*
* Javascript Diff Algorithm
* By John Resig (http://ejohn.org/)
* Modified by Chu Alan 'sprite'
*
* Released under the MIT license.
*
* More Info:
* http://ejohn.org/projects/javascript-diff-algorithm/
*/
function escape(s) {
var n = s;
n = n.replace(/&/g, '&');
n = n.replace(/</g, '&lt;');
n = n.replace(/>/g, '&gt;');
n = n.replace(/'/g, '&quot;');
return n;
}
function diffString( o, n ) {
o = o.replace(/\s+$/, '');
n = n.replace(/\s+$/, '');
var out = diff(o === '' ? [] : o.split(/\s+/), n === '' ? [] : n.split(/\s+/) );
var str = '';
var i;
var oSpace = o.match(/\s+/g);
if (oSpace === null) {
oSpace = ['\n'];
} else {
oSpace.push('\n');
}
var nSpace = n.match(/\s+/g);
if (nSpace === null) {
nSpace = ['\n'];
} else {
nSpace.push('\n');
}
if (out.n.length === 0) {
for (i = 0; i < out.o.length; i++) {
str += '<del>' + escape(out.o[i]) + oSpace[i] + '</del>';
}
} else {
if (out.n[0].text === null) {
for (n = 0; n < out.o.length && out.o[n].text === null; n++) {
str += '<del>' + escape(out.o[n]) + oSpace[n] + '</del>';
}
}
for (i = 0; i < out.n.length; i++ ) {
if (!out.n[i].text) {
str += '<ins>' + escape(out.n[i]) + nSpace[i] + '</ins>';
} else {
var pre = '';
for (n = out.n[i].row + 1; n < out.o.length && !out.o[n].text; n++ ) {
pre += '<del>' + escape(out.o[n]) + oSpace[n] + '</del>';
}
str += ' ' + out.n[i].text + nSpace[i] + pre;
}
}
}
return str;
}
function randomColor() {
return 'rgb(' + (Math.random() * 100) + '%, ' +
(Math.random() * 100) + '%, ' +
(Math.random() * 100) + '%)';
}
function diffString2( o, n ) {
var i;
o = o.replace(/\s+$/, '');
n = n.replace(/\s+$/, '');
var out = diff(o === '' ? [] : o.split(/\s+/), n === '' ? [] : n.split(/\s+/) );
var oSpace = o.match(/\s+/g);
if (!oSpace) {
oSpace = ['\n'];
} else {
oSpace.push('\n');
}
var nSpace = n.match(/\s+/g);
if (!nSpace) {
nSpace = ['\n'];
} else {
nSpace.push('\n');
}
var os = '';
var colors = [];
for (i = 0; i < out.o.length; i++) {
colors[i] = randomColor();
if (out.o[i].text) {
os += '<span style="background-color: ' +colors[i]+ '">' +
escape(out.o[i].text) + oSpace[i] + '</span>';
} else {
os += '<del>' + escape(out.o[i]) + oSpace[i] + '</del>';
}
}
var ns = '';
for (i = 0; i < out.n.length; i++) {
if (out.n[i].text) {
ns += '<span style="background-color: ' +colors[out.n[i].row]+ '">' +
escape(out.n[i].text) + nSpace[i] + '</span>';
} else {
ns += '<ins>' + escape(out.n[i]) + nSpace[i] + '</ins>';
}
}
return { o : os , n : ns };
}
function diff( o, n ) {
var ns = {};
var os = {};
var i;
for (i = 0; i < n.length; i++ ) {
if ( !ns[ n[i] ] ) {
ns[ n[i] ] = { rows: [], o: null };
}
ns[ n[i] ].rows.push( i );
}
for (i = 0; i < o.length; i++ ) {
if ( !os[ o[i] ] ){
os[ o[i] ] = { rows: [], n: null };
}
os[ o[i] ].rows.push( i );
}
for (i in ns ) {
if ( ns[i].rows.length === 1 && typeof(os[i]) !== 'undefined' && os[i].rows.length === 1 ) {
n[ ns[i].rows[0] ] = { text: n[ ns[i].rows[0] ], row: os[i].rows[0] };
o[ os[i].rows[0] ] = { text: o[ os[i].rows[0] ], row: ns[i].rows[0] };
}
}
for (i = 0; i < n.length - 1; i++ ) {
if ( n[i].text !== null && n[i+1].text === null && n[i].row + 1 < o.length && !o[ n[i].row + 1 ].text &&
n[i+1] === o[ n[i].row + 1 ] ) {
n[i+1] = { text: n[i+1], row: n[i].row + 1 };
o[n[i].row+1] = { text: o[n[i].row+1], row: i + 1 };
}
}
for (i = n.length - 1; i > 0; i-- ) {
if ( n[i].text && !n[i-1].text && n[i].row > 0 && !o[ n[i].row - 1 ].text &&
n[i-1] === o[ n[i].row - 1 ] ) {
n[i-1] = { text: n[i-1], row: n[i].row - 1 };
o[n[i].row-1] = { text: o[n[i].row-1], row: i - 1 };
}
}
return { o: o, n: n };
}
// Actual filter
return function(input, match) {
return diffString(input, match);
};
});

@ -0,0 +1,160 @@
/*
* Javascript Diff Algorithm
* By John Resig (http://ejohn.org/)
* Modified by Chu Alan "sprite"
*
* Released under the MIT license.
*
* More Info:
* http://ejohn.org/projects/javascript-diff-algorithm/
*/
function escape(s) {
var n = s;
n = n.replace(/&/g, "&amp;");
n = n.replace(/</g, "&lt;");
n = n.replace(/>/g, "&gt;");
n = n.replace(/"/g, "&quot;");
return n;
}
function diffString( o, n ) {
o = o.replace(/\s+$/, '');
n = n.replace(/\s+$/, '');
var out = diff(o == "" ? [] : o.split(/\s+/), n == "" ? [] : n.split(/\s+/) );
var str = "";
var oSpace = o.match(/\s+/g);
if (oSpace == null) {
oSpace = ["\n"];
} else {
oSpace.push("\n");
}
var nSpace = n.match(/\s+/g);
if (nSpace == null) {
nSpace = ["\n"];
} else {
nSpace.push("\n");
}
if (out.n.length == 0) {
for (var i = 0; i < out.o.length; i++) {
str += '<del>' + escape(out.o[i]) + oSpace[i] + "</del>";
}
} else {
if (out.n[0].text == null) {
for (n = 0; n < out.o.length && out.o[n].text == null; n++) {
str += '<del>' + escape(out.o[n]) + oSpace[n] + "</del>";
}
}
for ( var i = 0; i < out.n.length; i++ ) {
if (out.n[i].text == null) {
str += '<ins>' + escape(out.n[i]) + nSpace[i] + "</ins>";
} else {
var pre = "";
for (n = out.n[i].row + 1; n < out.o.length && out.o[n].text == null; n++ ) {
pre += '<del>' + escape(out.o[n]) + oSpace[n] + "</del>";
}
str += " " + out.n[i].text + nSpace[i] + pre;
}
}
}
return str;
}
function randomColor() {
return "rgb(" + (Math.random() * 100) + "%, " +
(Math.random() * 100) + "%, " +
(Math.random() * 100) + "%)";
}
function diffString2( o, n ) {
o = o.replace(/\s+$/, '');
n = n.replace(/\s+$/, '');
var out = diff(o == "" ? [] : o.split(/\s+/), n == "" ? [] : n.split(/\s+/) );
var oSpace = o.match(/\s+/g);
if (oSpace == null) {
oSpace = ["\n"];
} else {
oSpace.push("\n");
}
var nSpace = n.match(/\s+/g);
if (nSpace == null) {
nSpace = ["\n"];
} else {
nSpace.push("\n");
}
var os = "";
var colors = new Array();
for (var i = 0; i < out.o.length; i++) {
colors[i] = randomColor();
if (out.o[i].text != null) {
os += '<span style="background-color: ' +colors[i]+ '">' +
escape(out.o[i].text) + oSpace[i] + "</span>";
} else {
os += "<del>" + escape(out.o[i]) + oSpace[i] + "</del>";
}
}
var ns = "";
for (var i = 0; i < out.n.length; i++) {
if (out.n[i].text != null) {
ns += '<span style="background-color: ' +colors[out.n[i].row]+ '">' +
escape(out.n[i].text) + nSpace[i] + "</span>";
} else {
ns += "<ins>" + escape(out.n[i]) + nSpace[i] + "</ins>";
}
}
return { o : os , n : ns };
}
function diff( o, n ) {
var ns = new Object();
var os = new Object();
for ( var i = 0; i < n.length; i++ ) {
if ( ns[ n[i] ] == null )
ns[ n[i] ] = { rows: new Array(), o: null };
ns[ n[i] ].rows.push( i );
}
for ( var i = 0; i < o.length; i++ ) {
if ( os[ o[i] ] == null )
os[ o[i] ] = { rows: new Array(), n: null };
os[ o[i] ].rows.push( i );
}
for ( var i in ns ) {
if ( ns[i].rows.length == 1 && typeof(os[i]) != "undefined" && os[i].rows.length == 1 ) {
n[ ns[i].rows[0] ] = { text: n[ ns[i].rows[0] ], row: os[i].rows[0] };
o[ os[i].rows[0] ] = { text: o[ os[i].rows[0] ], row: ns[i].rows[0] };
}
}
for ( var i = 0; i < n.length - 1; i++ ) {
if ( n[i].text != null && n[i+1].text == null && n[i].row + 1 < o.length && o[ n[i].row + 1 ].text == null &&
n[i+1] == o[ n[i].row + 1 ] ) {
n[i+1] = { text: n[i+1], row: n[i].row + 1 };
o[n[i].row+1] = { text: o[n[i].row+1], row: i + 1 };
}
}
for ( var i = n.length - 1; i > 0; i-- ) {
if ( n[i].text != null && n[i-1].text == null && n[i].row > 0 && o[ n[i].row - 1 ].text == null &&
n[i-1] == o[ n[i].row - 1 ] ) {
n[i-1] = { text: n[i-1], row: n[i].row - 1 };
o[n[i].row-1] = { text: o[n[i].row-1], row: i - 1 };
}
}
return { o: o, n: n };
}

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'use strict';
describe('filter', function() {
beforeEach(module('diff'));
describe('checkmark', function() {
it('should convert a string to the diff value with another string', inject(function(diffFilter) {
expect(diffFilter(
'The red brown fox jumped over the rolling log.',
'The brown spotted fox leaped over the rolling log')).toBe(
' The <del>red </del> brown <ins>spotted </ins> fox <del>jumped </del><ins>leaped </ins> over the rolling <del>log.\n</del><ins>log\n</ins>');
}));
});
});