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# ==========================================
# Version: 0.0.2
# Compiled: Sun Feb 05 2012 10:59:07 GMT-0500 (EST)
# Contents:
# - src/lib/diff_match_patch.js
# - src/lib/jquery-1.7.1.js
# - src/lib/JSON2.js
# - src/flakey.coffee
# - src/util.coffee
# - src/models.coffee
# - src/controllers.coffee
# - src/views.coffee
# - src/exports.coffee
# ==========================================
`/**
* Diff Match and Patch
*
* Copyright 2006 Google Inc.
* http://code.google.com/p/google-diff-match-patch/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Computes the difference between two texts to create a patch.
* Applies the patch onto another text, allowing for errors.
* @author fraser@google.com (Neil Fraser)
*/
/**
* Class containing the diff, match and patch methods.
* @constructor
*/
function diff_match_patch() {
// Defaults.
// Redefine these in your program to override the defaults.
// Number of seconds to map a diff before giving up (0 for infinity).
this.Diff_Timeout = 1.0;
// Cost of an empty edit operation in terms of edit characters.
this.Diff_EditCost = 4;
// At what point is no match declared (0.0 = perfection, 1.0 = very loose).
this.Match_Threshold = 0.5;
// How far to search for a match (0 = exact location, 1000+ = broad match).
// A match this many characters away from the expected location will add
// 1.0 to the score (0.0 is a perfect match).
this.Match_Distance = 1000;
// When deleting a large block of text (over ~64 characters), how close does
// the contents have to match the expected contents. (0.0 = perfection,
// 1.0 = very loose). Note that Match_Threshold controls how closely the
// end points of a delete need to match.
this.Patch_DeleteThreshold = 0.5;
// Chunk size for context length.
this.Patch_Margin = 4;
// The number of bits in an int.
this.Match_MaxBits = 32;
}
// DIFF FUNCTIONS
/**
* The data structure representing a diff is an array of tuples:
* [[DIFF_DELETE, 'Hello'], [DIFF_INSERT, 'Goodbye'], [DIFF_EQUAL, ' world.']]
* which means: delete 'Hello', add 'Goodbye' and keep ' world.'
*/
var DIFF_DELETE = -1;
var DIFF_INSERT = 1;
var DIFF_EQUAL = 0;
/** @typedef {!Array.<number|string>} */
diff_match_patch.Diff;
/**
* Find the differences between two texts. Simplifies the problem by stripping
* any common prefix or suffix off the texts before diffing.
* @param {string} text1 Old string to be diffed.
* @param {string} text2 New string to be diffed.
* @param {boolean=} opt_checklines Optional speedup flag. If present and false,
* then don't run a line-level diff first to identify the changed areas.
* Defaults to true, which does a faster, slightly less optimal diff.
* @param {number} opt_deadline Optional time when the diff should be complete
* by. Used internally for recursive calls. Users should set DiffTimeout
* instead.
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
*/
diff_match_patch.prototype.diff_main = function(text1, text2, opt_checklines,
opt_deadline) {
// Set a deadline by which time the diff must be complete.
if (typeof opt_deadline == 'undefined') {
if (this.Diff_Timeout <= 0) {
opt_deadline = Number.MAX_VALUE;
} else {
opt_deadline = (new Date).getTime() + this.Diff_Timeout * 1000;
}
}
var deadline = opt_deadline;
// Check for null inputs.
if (text1 == null || text2 == null) {
throw new Error('Null input. (diff_main)');
}
// Check for equality (speedup).
if (text1 == text2) {
if (text1) {
return [[DIFF_EQUAL, text1]];
}
return [];
}
if (typeof opt_checklines == 'undefined') {
opt_checklines = true;
}
var checklines = opt_checklines;
// Trim off common prefix (speedup).
var commonlength = this.diff_commonPrefix(text1, text2);
var commonprefix = text1.substring(0, commonlength);
text1 = text1.substring(commonlength);
text2 = text2.substring(commonlength);
// Trim off common suffix (speedup).
commonlength = this.diff_commonSuffix(text1, text2);
var commonsuffix = text1.substring(text1.length - commonlength);
text1 = text1.substring(0, text1.length - commonlength);
text2 = text2.substring(0, text2.length - commonlength);
// Compute the diff on the middle block.
var diffs = this.diff_compute_(text1, text2, checklines, deadline);
// Restore the prefix and suffix.
if (commonprefix) {
diffs.unshift([DIFF_EQUAL, commonprefix]);
}
if (commonsuffix) {
diffs.push([DIFF_EQUAL, commonsuffix]);
}
this.diff_cleanupMerge(diffs);
return diffs;
};
/**
* Find the differences between two texts. Assumes that the texts do not
* have any common prefix or suffix.
* @param {string} text1 Old string to be diffed.
* @param {string} text2 New string to be diffed.
* @param {boolean} checklines Speedup flag. If false, then don't run a
* line-level diff first to identify the changed areas.
* If true, then run a faster, slightly less optimal diff.
* @param {number} deadline Time when the diff should be complete by.
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
* @private
*/
diff_match_patch.prototype.diff_compute_ = function(text1, text2, checklines,
deadline) {
var diffs;
if (!text1) {
// Just add some text (speedup).
return [[DIFF_INSERT, text2]];
}
if (!text2) {
// Just delete some text (speedup).
return [[DIFF_DELETE, text1]];
}
var longtext = text1.length > text2.length ? text1 : text2;
var shorttext = text1.length > text2.length ? text2 : text1;
var i = longtext.indexOf(shorttext);
if (i != -1) {
// Shorter text is inside the longer text (speedup).
diffs = [[DIFF_INSERT, longtext.substring(0, i)],
[DIFF_EQUAL, shorttext],
[DIFF_INSERT, longtext.substring(i + shorttext.length)]];
// Swap insertions for deletions if diff is reversed.
if (text1.length > text2.length) {
diffs[0][0] = diffs[2][0] = DIFF_DELETE;
}
return diffs;
}
if (shorttext.length == 1) {
// Single character string.
// After the previous speedup, the character can't be an equality.
return [[DIFF_DELETE, text1], [DIFF_INSERT, text2]];
}
longtext = shorttext = null; // Garbage collect.
// Check to see if the problem can be split in two.
var hm = this.diff_halfMatch_(text1, text2);
if (hm) {
// A half-match was found, sort out the return data.
var text1_a = hm[0];
var text1_b = hm[1];
var text2_a = hm[2];
var text2_b = hm[3];
var mid_common = hm[4];
// Send both pairs off for separate processing.
var diffs_a = this.diff_main(text1_a, text2_a, checklines, deadline);
var diffs_b = this.diff_main(text1_b, text2_b, checklines, deadline);
// Merge the results.
return diffs_a.concat([[DIFF_EQUAL, mid_common]], diffs_b);
}
if (checklines && text1.length > 100 && text2.length > 100) {
return this.diff_lineMode_(text1, text2, deadline);
}
return this.diff_bisect_(text1, text2, deadline);
};
/**
* Do a quick line-level diff on both strings, then rediff the parts for
* greater accuracy.
* This speedup can produce non-minimal diffs.
* @param {string} text1 Old string to be diffed.
* @param {string} text2 New string to be diffed.
* @param {number} deadline Time when the diff should be complete by.
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
* @private
*/
diff_match_patch.prototype.diff_lineMode_ = function(text1, text2, deadline) {
// Scan the text on a line-by-line basis first.
var a = this.diff_linesToChars_(text1, text2);
text1 = /** @type {string} */(a[0]);
text2 = /** @type {string} */(a[1]);
var linearray = /** @type {!Array.<string>} */(a[2]);
var diffs = this.diff_bisect_(text1, text2, deadline);
// Convert the diff back to original text.
this.diff_charsToLines_(diffs, linearray);
// Eliminate freak matches (e.g. blank lines)
this.diff_cleanupSemantic(diffs);
// Rediff any replacement blocks, this time character-by-character.
// Add a dummy entry at the end.
diffs.push([DIFF_EQUAL, '']);
var pointer = 0;
var count_delete = 0;
var count_insert = 0;
var text_delete = '';
var text_insert = '';
while (pointer < diffs.length) {
switch (diffs[pointer][0]) {
case DIFF_INSERT:
count_insert++;
text_insert += diffs[pointer][1];
break;
case DIFF_DELETE:
count_delete++;
text_delete += diffs[pointer][1];
break;
case DIFF_EQUAL:
// Upon reaching an equality, check for prior redundancies.
if (count_delete >= 1 && count_insert >= 1) {
// Delete the offending records and add the merged ones.
var a = this.diff_main(text_delete, text_insert, false, deadline);
diffs.splice(pointer - count_delete - count_insert,
count_delete + count_insert);
pointer = pointer - count_delete - count_insert;
for (var j = a.length - 1; j >= 0; j--) {
diffs.splice(pointer, 0, a[j]);
}
pointer = pointer + a.length;
}
count_insert = 0;
count_delete = 0;
text_delete = '';
text_insert = '';
break;
}
pointer++;
}
diffs.pop(); // Remove the dummy entry at the end.
return diffs;
};
/**
* Find the 'middle snake' of a diff, split the problem in two
* and return the recursively constructed diff.
* See Myers 1986 paper: An O(ND) Difference Algorithm and Its Variations.
* @param {string} text1 Old string to be diffed.
* @param {string} text2 New string to be diffed.
* @param {number} deadline Time at which to bail if not yet complete.
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
* @private
*/
diff_match_patch.prototype.diff_bisect_ = function(text1, text2, deadline) {
// Cache the text lengths to prevent multiple calls.
var text1_length = text1.length;
var text2_length = text2.length;
var max_d = Math.ceil((text1_length + text2_length) / 2);
var v_offset = max_d;
var v_length = 2 * max_d;
var v1 = new Array(v_length);
var v2 = new Array(v_length);
// Setting all elements to -1 is faster in Chrome & Firefox than mixing
// integers and undefined.
for (var x = 0; x < v_length; x++) {
v1[x] = -1;
v2[x] = -1;
}
v1[v_offset + 1] = 0;
v2[v_offset + 1] = 0;
var delta = text1_length - text2_length;
// If the total number of characters is odd, then the front path will collide
// with the reverse path.
var front = (delta % 2 != 0);
// Offsets for start and end of k loop.
// Prevents mapping of space beyond the grid.
var k1start = 0;
var k1end = 0;
var k2start = 0;
var k2end = 0;
for (var d = 0; d < max_d; d++) {
// Bail out if deadline is reached.
if ((new Date()).getTime() > deadline) {
break;
}
// Walk the front path one step.
for (var k1 = -d + k1start; k1 <= d - k1end; k1 += 2) {
var k1_offset = v_offset + k1;
var x1;
if (k1 == -d || k1 != d && v1[k1_offset - 1] < v1[k1_offset + 1]) {
x1 = v1[k1_offset + 1];
} else {
x1 = v1[k1_offset - 1] + 1;
}
var y1 = x1 - k1;
while (x1 < text1_length && y1 < text2_length &&
text1.charAt(x1) == text2.charAt(y1)) {
x1++;
y1++;
}
v1[k1_offset] = x1;
if (x1 > text1_length) {
// Ran off the right of the graph.
k1end += 2;
} else if (y1 > text2_length) {
// Ran off the bottom of the graph.
k1start += 2;
} else if (front) {
var k2_offset = v_offset + delta - k1;
if (k2_offset >= 0 && k2_offset < v_length && v2[k2_offset] != -1) {
// Mirror x2 onto top-left coordinate system.
var x2 = text1_length - v2[k2_offset];
if (x1 >= x2) {
// Overlap detected.
return this.diff_bisectSplit_(text1, text2, x1, y1, deadline);
}
}
}
}
// Walk the reverse path one step.
for (var k2 = -d + k2start; k2 <= d - k2end; k2 += 2) {
var k2_offset = v_offset + k2;
var x2;
if (k2 == -d || k2 != d && v2[k2_offset - 1] < v2[k2_offset + 1]) {
x2 = v2[k2_offset + 1];
} else {
x2 = v2[k2_offset - 1] + 1;
}
var y2 = x2 - k2;
while (x2 < text1_length && y2 < text2_length &&
text1.charAt(text1_length - x2 - 1) ==
text2.charAt(text2_length - y2 - 1)) {
x2++;
y2++;
}
v2[k2_offset] = x2;
if (x2 > text1_length) {
// Ran off the left of the graph.
k2end += 2;
} else if (y2 > text2_length) {
// Ran off the top of the graph.
k2start += 2;
} else if (!front) {
var k1_offset = v_offset + delta - k2;
if (k1_offset >= 0 && k1_offset < v_length && v1[k1_offset] != -1) {
var x1 = v1[k1_offset];
var y1 = v_offset + x1 - k1_offset;
// Mirror x2 onto top-left coordinate system.
x2 = text1_length - x2;
if (x1 >= x2) {
// Overlap detected.
return this.diff_bisectSplit_(text1, text2, x1, y1, deadline);
}
}
}
}
}
// Diff took too long and hit the deadline or
// number of diffs equals number of characters, no commonality at all.
return [[DIFF_DELETE, text1], [DIFF_INSERT, text2]];
};
/**
* Given the location of the 'middle snake', split the diff in two parts
* and recurse.
* @param {string} text1 Old string to be diffed.
* @param {string} text2 New string to be diffed.
* @param {number} x Index of split point in text1.
* @param {number} y Index of split point in text2.
* @param {number} deadline Time at which to bail if not yet complete.
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
* @private
*/
diff_match_patch.prototype.diff_bisectSplit_ = function(text1, text2, x, y,
deadline) {
var text1a = text1.substring(0, x);
var text2a = text2.substring(0, y);
var text1b = text1.substring(x);
var text2b = text2.substring(y);
// Compute both diffs serially.
var diffs = this.diff_main(text1a, text2a, false, deadline);
var diffsb = this.diff_main(text1b, text2b, false, deadline);
return diffs.concat(diffsb);
};
/**
* Split two texts into an array of strings. Reduce the texts to a string of
* hashes where each Unicode character represents one line.
* @param {string} text1 First string.
* @param {string} text2 Second string.
* @return {!Array.<string|!Array.<string>>} Three element Array, containing the
* encoded text1, the encoded text2 and the array of unique strings. The
* zeroth element of the array of unique strings is intentionally blank.
* @private
*/
diff_match_patch.prototype.diff_linesToChars_ = function(text1, text2) {
var lineArray = []; // e.g. lineArray[4] == 'Hello\n'
var lineHash = {}; // e.g. lineHash['Hello\n'] == 4
// '\x00' is a valid character, but various debuggers don't like it.
// So we'll insert a junk entry to avoid generating a null character.
lineArray[0] = '';
/**
* Split a text into an array of strings. Reduce the texts to a string of
* hashes where each Unicode character represents one line.
* Modifies linearray and linehash through being a closure.
* @param {string} text String to encode.
* @return {string} Encoded string.
* @private
*/
function diff_linesToCharsMunge_(text) {
var chars = '';
// Walk the text, pulling out a substring for each line.
// text.split('\n') would would temporarily double our memory footprint.
// Modifying text would create many large strings to garbage collect.
var lineStart = 0;
var lineEnd = -1;
// Keeping our own length variable is faster than looking it up.
var lineArrayLength = lineArray.length;
while (lineEnd < text.length - 1) {
lineEnd = text.indexOf('\n', lineStart);
if (lineEnd == -1) {
lineEnd = text.length - 1;
}
var line = text.substring(lineStart, lineEnd + 1);
lineStart = lineEnd + 1;
if (lineHash.hasOwnProperty ? lineHash.hasOwnProperty(line) :
(lineHash[line] !== undefined)) {
chars += String.fromCharCode(lineHash[line]);
} else {
chars += String.fromCharCode(lineArrayLength);
lineHash[line] = lineArrayLength;
lineArray[lineArrayLength++] = line;
}
}
return chars;
}
var chars1 = diff_linesToCharsMunge_(text1);
var chars2 = diff_linesToCharsMunge_(text2);
return [chars1, chars2, lineArray];
};
/**
* Rehydrate the text in a diff from a string of line hashes to real lines of
* text.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @param {!Array.<string>} lineArray Array of unique strings.
* @private
*/
diff_match_patch.prototype.diff_charsToLines_ = function(diffs, lineArray) {
for (var x = 0; x < diffs.length; x++) {
var chars = diffs[x][1];
var text = [];
for (var y = 0; y < chars.length; y++) {
text[y] = lineArray[chars.charCodeAt(y)];
}
diffs[x][1] = text.join('');
}
};
/**
* Determine the common prefix of two strings.
* @param {string} text1 First string.
* @param {string} text2 Second string.
* @return {number} The number of characters common to the start of each
* string.
*/
diff_match_patch.prototype.diff_commonPrefix = function(text1, text2) {
// Quick check for common null cases.
if (!text1 || !text2 || text1.charAt(0) != text2.charAt(0)) {
return 0;
}
// Binary search.
// Performance analysis: http://neil.fraser.name/news/2007/10/09/
var pointermin = 0;
var pointermax = Math.min(text1.length, text2.length);
var pointermid = pointermax;
var pointerstart = 0;
while (pointermin < pointermid) {
if (text1.substring(pointerstart, pointermid) ==
text2.substring(pointerstart, pointermid)) {
pointermin = pointermid;
pointerstart = pointermin;
} else {
pointermax = pointermid;
}
pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
}
return pointermid;
};
/**
* Determine the common suffix of two strings.
* @param {string} text1 First string.
* @param {string} text2 Second string.
* @return {number} The number of characters common to the end of each string.
*/
diff_match_patch.prototype.diff_commonSuffix = function(text1, text2) {
// Quick check for common null cases.
if (!text1 || !text2 ||
text1.charAt(text1.length - 1) != text2.charAt(text2.length - 1)) {
return 0;
}
// Binary search.
// Performance analysis: http://neil.fraser.name/news/2007/10/09/
var pointermin = 0;
var pointermax = Math.min(text1.length, text2.length);
var pointermid = pointermax;
var pointerend = 0;
while (pointermin < pointermid) {
if (text1.substring(text1.length - pointermid, text1.length - pointerend) ==
text2.substring(text2.length - pointermid, text2.length - pointerend)) {
pointermin = pointermid;
pointerend = pointermin;
} else {
pointermax = pointermid;
}
pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
}
return pointermid;
};
/**
* Determine if the suffix of one string is the prefix of another.
* @param {string} text1 First string.
* @param {string} text2 Second string.
* @return {number} The number of characters common to the end of the first
* string and the start of the second string.
* @private
*/
diff_match_patch.prototype.diff_commonOverlap_ = function(text1, text2) {
// Cache the text lengths to prevent multiple calls.
var text1_length = text1.length;
var text2_length = text2.length;
// Eliminate the null case.
if (text1_length == 0 || text2_length == 0) {
return 0;
}
// Truncate the longer string.
if (text1_length > text2_length) {
text1 = text1.substring(text1_length - text2_length);
} else if (text1_length < text2_length) {
text2 = text2.substring(0, text1_length);
}
var text_length = Math.min(text1_length, text2_length);
// Quick check for the worst case.
if (text1 == text2) {
return text_length;
}
// Start by looking for a single character match
// and increase length until no match is found.
// Performance analysis: http://neil.fraser.name/news/2010/11/04/
var best = 0;
var length = 1;
while (true) {
var pattern = text1.substring(text_length - length);
var found = text2.indexOf(pattern);
if (found == -1) {
return best;
}
length += found;
if (found == 0 || text1.substring(text_length - length) ==
text2.substring(0, length)) {
best = length;
length++;
}
}
};
/**
* Do the two texts share a substring which is at least half the length of the
* longer text?
* This speedup can produce non-minimal diffs.
* @param {string} text1 First string.
* @param {string} text2 Second string.
* @return {Array.<string>} Five element Array, containing the prefix of
* text1, the suffix of text1, the prefix of text2, the suffix of
* text2 and the common middle. Or null if there was no match.
* @private
*/
diff_match_patch.prototype.diff_halfMatch_ = function(text1, text2) {
if (this.Diff_Timeout <= 0) {
// Don't risk returning a non-optimal diff if we have unlimited time.
return null;
}
var longtext = text1.length > text2.length ? text1 : text2;
var shorttext = text1.length > text2.length ? text2 : text1;
if (longtext.length < 4 || shorttext.length * 2 < longtext.length) {
return null; // Pointless.
}
var dmp = this; // 'this' becomes 'window' in a closure.
/**
* Does a substring of shorttext exist within longtext such that the substring
* is at least half the length of longtext?
* Closure, but does not reference any external variables.
* @param {string} longtext Longer string.
* @param {string} shorttext Shorter string.
* @param {number} i Start index of quarter length substring within longtext.
* @return {Array.<string>} Five element Array, containing the prefix of
* longtext, the suffix of longtext, the prefix of shorttext, the suffix
* of shorttext and the common middle. Or null if there was no match.
* @private
*/
function diff_halfMatchI_(longtext, shorttext, i) {
// Start with a 1/4 length substring at position i as a seed.
var seed = longtext.substring(i, i + Math.floor(longtext.length / 4));
var j = -1;
var best_common = '';
var best_longtext_a, best_longtext_b, best_shorttext_a, best_shorttext_b;
while ((j = shorttext.indexOf(seed, j + 1)) != -1) {
var prefixLength = dmp.diff_commonPrefix(longtext.substring(i),
shorttext.substring(j));
var suffixLength = dmp.diff_commonSuffix(longtext.substring(0, i),
shorttext.substring(0, j));
if (best_common.length < suffixLength + prefixLength) {
best_common = shorttext.substring(j - suffixLength, j) +
shorttext.substring(j, j + prefixLength);
best_longtext_a = longtext.substring(0, i - suffixLength);
best_longtext_b = longtext.substring(i + prefixLength);
best_shorttext_a = shorttext.substring(0, j - suffixLength);
best_shorttext_b = shorttext.substring(j + prefixLength);
}
}
if (best_common.length * 2 >= longtext.length) {
return [best_longtext_a, best_longtext_b,
best_shorttext_a, best_shorttext_b, best_common];
} else {
return null;
}
}
// First check if the second quarter is the seed for a half-match.
var hm1 = diff_halfMatchI_(longtext, shorttext,
Math.ceil(longtext.length / 4));
// Check again based on the third quarter.
var hm2 = diff_halfMatchI_(longtext, shorttext,
Math.ceil(longtext.length / 2));
var hm;
if (!hm1 && !hm2) {
return null;
} else if (!hm2) {
hm = hm1;
} else if (!hm1) {
hm = hm2;
} else {
// Both matched. Select the longest.
hm = hm1[4].length > hm2[4].length ? hm1 : hm2;
}
// A half-match was found, sort out the return data.
var text1_a, text1_b, text2_a, text2_b;
if (text1.length > text2.length) {
text1_a = hm[0];
text1_b = hm[1];
text2_a = hm[2];
text2_b = hm[3];
} else {
text2_a = hm[0];
text2_b = hm[1];
text1_a = hm[2];
text1_b = hm[3];
}
var mid_common = hm[4];
return [text1_a, text1_b, text2_a, text2_b, mid_common];
};
/**
* Reduce the number of edits by eliminating semantically trivial equalities.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
*/
diff_match_patch.prototype.diff_cleanupSemantic = function(diffs) {
var changes = false;
var equalities = []; // Stack of indices where equalities are found.
var equalitiesLength = 0; // Keeping our own length var is faster in JS.
/** @type {?string} */
var lastequality = null; // Always equal to equalities[equalitiesLength-1][1]
var pointer = 0; // Index of current position.
// Number of characters that changed prior to the equality.
var length_insertions1 = 0;
var length_deletions1 = 0;
// Number of characters that changed after the equality.
var length_insertions2 = 0;
var length_deletions2 = 0;
while (pointer < diffs.length) {
if (diffs[pointer][0] == DIFF_EQUAL) { // Equality found.
equalities[equalitiesLength++] = pointer;
length_insertions1 = length_insertions2;
length_deletions1 = length_deletions2;
length_insertions2 = 0;
length_deletions2 = 0;
lastequality = /** @type {string} */(diffs[pointer][1]);
} else { // An insertion or deletion.
if (diffs[pointer][0] == DIFF_INSERT) {
length_insertions2 += diffs[pointer][1].length;
} else {
length_deletions2 += diffs[pointer][1].length;
}
// Eliminate an equality that is smaller or equal to the edits on both
// sides of it.
if (lastequality !== null && (lastequality.length <=
Math.max(length_insertions1, length_deletions1)) &&
(lastequality.length <= Math.max(length_insertions2,
length_deletions2))) {
// Duplicate record.
diffs.splice(equalities[equalitiesLength - 1], 0,
[DIFF_DELETE, lastequality]);
// Change second copy to insert.
diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
// Throw away the equality we just deleted.
equalitiesLength--;
// Throw away the previous equality (it needs to be reevaluated).
equalitiesLength--;
pointer = equalitiesLength > 0 ? equalities[equalitiesLength - 1] : -1;
length_insertions1 = 0; // Reset the counters.
length_deletions1 = 0;
length_insertions2 = 0;
length_deletions2 = 0;
lastequality = null;
changes = true;
}
}
pointer++;
}
// Normalize the diff.
if (changes) {
this.diff_cleanupMerge(diffs);
}
this.diff_cleanupSemanticLossless(diffs);
// Find any overlaps between deletions and insertions.
// e.g: <del>abcxxx</del><ins>xxxdef</ins>
// -> <del>abc</del>xxx<ins>def</ins>
// e.g: <del>xxxabc</del><ins>defxxx</ins>
// -> <ins>def</ins>xxx<del>abc</del>
// Only extract an overlap if it is as big as the edit ahead or behind it.
pointer = 1;
while (pointer < diffs.length) {
if (diffs[pointer - 1][0] == DIFF_DELETE &&
diffs[pointer][0] == DIFF_INSERT) {
var deletion = /** @type {string} */(diffs[pointer - 1][1]);
var insertion = /** @type {string} */(diffs[pointer][1]);
var overlap_length1 = this.diff_commonOverlap_(deletion, insertion);
var overlap_length2 = this.diff_commonOverlap_(insertion, deletion);
if (overlap_length1 >= overlap_length2) {
if (overlap_length1 >= deletion.length / 2 ||
overlap_length1 >= insertion.length / 2) {
// Overlap found. Insert an equality and trim the surrounding edits.
diffs.splice(pointer, 0,
[DIFF_EQUAL, insertion.substring(0, overlap_length1)]);
diffs[pointer - 1][1] =
deletion.substring(0, deletion.length - overlap_length1);
diffs[pointer + 1][1] = insertion.substring(overlap_length1);
pointer++;
}
} else {
if (overlap_length2 >= deletion.length / 2 ||
overlap_length2 >= insertion.length / 2) {
// Reverse overlap found.
// Insert an equality and swap and trim the surrounding edits.
diffs.splice(pointer, 0,
[DIFF_EQUAL, deletion.substring(0, overlap_length2)]);
diffs[pointer - 1] = [DIFF_INSERT,
insertion.substring(0, insertion.length - overlap_length2)];
diffs[pointer + 1] = [DIFF_DELETE,
deletion.substring(overlap_length2)];
pointer++;
}
}
pointer++;
}
pointer++;
}
};
/**
* Look for single edits surrounded on both sides by equalities
* which can be shifted sideways to align the edit to a word boundary.
* e.g: The c<ins>at c</ins>ame. -> The <ins>cat </ins>came.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
*/
diff_match_patch.prototype.diff_cleanupSemanticLossless = function(diffs) {
/**
* Given two strings, compute a score representing whether the internal
* boundary falls on logical boundaries.
* Scores range from 6 (best) to 0 (worst).
* Closure, but does not reference any external variables.
* @param {string} one First string.
* @param {string} two Second string.
* @return {number} The score.
* @private
*/
function diff_cleanupSemanticScore_(one, two) {
if (!one || !two) {
// Edges are the best.
return 6;
}
// Each port of this function behaves slightly differently due to
// subtle differences in each language's definition of things like
// 'whitespace'. Since this function's purpose is largely cosmetic,
// the choice has been made to use each language's native features
// rather than force total conformity.
var char1 = one.charAt(one.length - 1);
var char2 = two.charAt(0);
var nonAlphaNumeric1 = char1.match(diff_match_patch.nonAlphaNumericRegex_);
var nonAlphaNumeric2 = char2.match(diff_match_patch.nonAlphaNumericRegex_);
var whitespace1 = nonAlphaNumeric1 &&
char1.match(diff_match_patch.whitespaceRegex_);
var whitespace2 = nonAlphaNumeric2 &&
char2.match(diff_match_patch.whitespaceRegex_);
var lineBreak1 = whitespace1 &&
char1.match(diff_match_patch.linebreakRegex_);
var lineBreak2 = whitespace2 &&
char2.match(diff_match_patch.linebreakRegex_);
var blankLine1 = lineBreak1 &&
one.match(diff_match_patch.blanklineEndRegex_);
var blankLine2 = lineBreak2 &&
two.match(diff_match_patch.blanklineStartRegex_);
if (blankLine1 || blankLine2) {
// Five points for blank lines.
return 5;
} else if (lineBreak1 || lineBreak2) {
// Four points for line breaks.
return 4;
} else if (nonAlphaNumeric1 && !whitespace1 && whitespace2) {
// Three points for end of sentences.
return 3;
} else if (whitespace1 || whitespace2) {
// Two points for whitespace.
return 2;
} else if (nonAlphaNumeric1 || nonAlphaNumeric2) {
// One point for non-alphanumeric.
return 1;
}
return 0;
}
var pointer = 1;
// Intentionally ignore the first and last element (don't need checking).
while (pointer < diffs.length - 1) {
if (diffs[pointer - 1][0] == DIFF_EQUAL &&
diffs[pointer + 1][0] == DIFF_EQUAL) {
// This is a single edit surrounded by equalities.
var equality1 = /** @type {string} */(diffs[pointer - 1][1]);
var edit = /** @type {string} */(diffs[pointer][1]);
var equality2 = /** @type {string} */(diffs[pointer + 1][1]);
// First, shift the edit as far left as possible.
var commonOffset = this.diff_commonSuffix(equality1, edit);
if (commonOffset) {
var commonString = edit.substring(edit.length - commonOffset);
equality1 = equality1.substring(0, equality1.length - commonOffset);
edit = commonString + edit.substring(0, edit.length - commonOffset);
equality2 = commonString + equality2;
}
// Second, step character by character right, looking for the best fit.
var bestEquality1 = equality1;
var bestEdit = edit;
var bestEquality2 = equality2;
var bestScore = diff_cleanupSemanticScore_(equality1, edit) +
diff_cleanupSemanticScore_(edit, equality2);
while (edit.charAt(0) === equality2.charAt(0)) {
equality1 += edit.charAt(0);
edit = edit.substring(1) + equality2.charAt(0);
equality2 = equality2.substring(1);
var score = diff_cleanupSemanticScore_(equality1, edit) +
diff_cleanupSemanticScore_(edit, equality2);
// The >= encourages trailing rather than leading whitespace on edits.
if (score >= bestScore) {
bestScore = score;
bestEquality1 = equality1;
bestEdit = edit;
bestEquality2 = equality2;
}
}
if (diffs[pointer - 1][1] != bestEquality1) {
// We have an improvement, save it back to the diff.
if (bestEquality1) {
diffs[pointer - 1][1] = bestEquality1;
} else {
diffs.splice(pointer - 1, 1);
pointer--;
}
diffs[pointer][1] = bestEdit;
if (bestEquality2) {
diffs[pointer + 1][1] = bestEquality2;
} else {
diffs.splice(pointer + 1, 1);
pointer--;
}
}
}
pointer++;
}
};
// Define some regex patterns for matching boundaries.
diff_match_patch.nonAlphaNumericRegex_ = /[^a-zA-Z0-9]/;
diff_match_patch.whitespaceRegex_ = /\s/;
diff_match_patch.linebreakRegex_ = /[\r\n]/;
diff_match_patch.blanklineEndRegex_ = /\n\r?\n$/;
diff_match_patch.blanklineStartRegex_ = /^\r?\n\r?\n/;
/**
* Reduce the number of edits by eliminating operationally trivial equalities.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
*/
diff_match_patch.prototype.diff_cleanupEfficiency = function(diffs) {
var changes = false;
var equalities = []; // Stack of indices where equalities are found.
var equalitiesLength = 0; // Keeping our own length var is faster in JS.
var lastequality = ''; // Always equal to equalities[equalitiesLength-1][1]
var pointer = 0; // Index of current position.
// Is there an insertion operation before the last equality.
var pre_ins = false;
// Is there a deletion operation before the last equality.
var pre_del = false;
// Is there an insertion operation after the last equality.
var post_ins = false;
// Is there a deletion operation after the last equality.
var post_del = false;
while (pointer < diffs.length) {
if (diffs[pointer][0] == DIFF_EQUAL) { // Equality found.
if (diffs[pointer][1].length < this.Diff_EditCost &&
(post_ins || post_del)) {
// Candidate found.
equalities[equalitiesLength++] = pointer;
pre_ins = post_ins;
pre_del = post_del;
lastequality = diffs[pointer][1];
} else {
// Not a candidate, and can never become one.
equalitiesLength = 0;
lastequality = '';
}
post_ins = post_del = false;
} else { // An insertion or deletion.
if (diffs[pointer][0] == DIFF_DELETE) {
post_del = true;
} else {
post_ins = true;
}
/*
* Five types to be split:
* <ins>A</ins><del>B</del>XY<ins>C</ins><del>D</del>
* <ins>A</ins>X<ins>C</ins><del>D</del>
* <ins>A</ins><del>B</del>X<ins>C</ins>
* <ins>A</del>X<ins>C</ins><del>D</del>
* <ins>A</ins><del>B</del>X<del>C</del>
*/
if (lastequality && ((pre_ins && pre_del && post_ins && post_del) ||
((lastequality.length < this.Diff_EditCost / 2) &&
(pre_ins + pre_del + post_ins + post_del) == 3))) {
// Duplicate record.
diffs.splice(equalities[equalitiesLength - 1], 0,
[DIFF_DELETE, lastequality]);
// Change second copy to insert.
diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
equalitiesLength--; // Throw away the equality we just deleted;
lastequality = '';
if (pre_ins && pre_del) {
// No changes made which could affect previous entry, keep going.
post_ins = post_del = true;
equalitiesLength = 0;
} else {
equalitiesLength--; // Throw away the previous equality.
pointer = equalitiesLength > 0 ?
equalities[equalitiesLength - 1] : -1;
post_ins = post_del = false;
}
changes = true;
}
}
pointer++;
}
if (changes) {
this.diff_cleanupMerge(diffs);
}
};
/**
* Reorder and merge like edit sections. Merge equalities.
* Any edit section can move as long as it doesn't cross an equality.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
*/
diff_match_patch.prototype.diff_cleanupMerge = function(diffs) {
diffs.push([DIFF_EQUAL, '']); // Add a dummy entry at the end.
var pointer = 0;
var count_delete = 0;
var count_insert = 0;
var text_delete = '';
var text_insert = '';
var commonlength;
while (pointer < diffs.length) {
switch (diffs[pointer][0]) {
case DIFF_INSERT:
count_insert++;
text_insert += diffs[pointer][1];
pointer++;
break;
case DIFF_DELETE:
count_delete++;
text_delete += diffs[pointer][1];
pointer++;
break;
case DIFF_EQUAL:
// Upon reaching an equality, check for prior redundancies.
if (count_delete + count_insert > 1) {
if (count_delete !== 0 && count_insert !== 0) {
// Factor out any common prefixies.
commonlength = this.diff_commonPrefix(text_insert, text_delete);
if (commonlength !== 0) {
if ((pointer - count_delete - count_insert) > 0 &&
diffs[pointer - count_delete - count_insert - 1][0] ==
DIFF_EQUAL) {
diffs[pointer - count_delete - count_insert - 1][1] +=
text_insert.substring(0, commonlength);
} else {
diffs.splice(0, 0, [DIFF_EQUAL,
text_insert.substring(0, commonlength)]);
pointer++;
}
text_insert = text_insert.substring(commonlength);
text_delete = text_delete.substring(commonlength);
}
// Factor out any common suffixies.
commonlength = this.diff_commonSuffix(text_insert, text_delete);
if (commonlength !== 0) {
diffs[pointer][1] = text_insert.substring(text_insert.length -
commonlength) + diffs[pointer][1];
text_insert = text_insert.substring(0, text_insert.length -
commonlength);
text_delete = text_delete.substring(0, text_delete.length -
commonlength);
}
}
// Delete the offending records and add the merged ones.
if (count_delete === 0) {
diffs.splice(pointer - count_delete - count_insert,
count_delete + count_insert, [DIFF_INSERT, text_insert]);
} else if (count_insert === 0) {
diffs.splice(pointer - count_delete - count_insert,
count_delete + count_insert, [DIFF_DELETE, text_delete]);
} else {
diffs.splice(pointer - count_delete - count_insert,
count_delete + count_insert, [DIFF_DELETE, text_delete],
[DIFF_INSERT, text_insert]);
}
pointer = pointer - count_delete - count_insert +
(count_delete ? 1 : 0) + (count_insert ? 1 : 0) + 1;
} else if (pointer !== 0 && diffs[pointer - 1][0] == DIFF_EQUAL) {
// Merge this equality with the previous one.
diffs[pointer - 1][1] += diffs[pointer][1];
diffs.splice(pointer, 1);
} else {
pointer++;
}
count_insert = 0;
count_delete = 0;
text_delete = '';
text_insert = '';
break;
}
}
if (diffs[diffs.length - 1][1] === '') {
diffs.pop(); // Remove the dummy entry at the end.
}
// Second pass: look for single edits surrounded on both sides by equalities
// which can be shifted sideways to eliminate an equality.
// e.g: A<ins>BA</ins>C -> <ins>AB</ins>AC
var changes = false;
pointer = 1;
// Intentionally ignore the first and last element (don't need checking).
while (pointer < diffs.length - 1) {
if (diffs[pointer - 1][0] == DIFF_EQUAL &&
diffs[pointer + 1][0] == DIFF_EQUAL) {
// This is a single edit surrounded by equalities.
if (diffs[pointer][1].substring(diffs[pointer][1].length -
diffs[pointer - 1][1].length) == diffs[pointer - 1][1]) {
// Shift the edit over the previous equality.
diffs[pointer][1] = diffs[pointer - 1][1] +
diffs[pointer][1].substring(0, diffs[pointer][1].length -
diffs[pointer - 1][1].length);
diffs[pointer + 1][1] = diffs[pointer - 1][1] + diffs[pointer + 1][1];
diffs.splice(pointer - 1, 1);
changes = true;
} else if (diffs[pointer][1].substring(0, diffs[pointer + 1][1].length) ==
diffs[pointer + 1][1]) {
// Shift the edit over the next equality.
diffs[pointer - 1][1] += diffs[pointer + 1][1];
diffs[pointer][1] =
diffs[pointer][1].substring(diffs[pointer + 1][1].length) +
diffs[pointer + 1][1];
diffs.splice(pointer + 1, 1);
changes = true;
}
}
pointer++;
}
// If shifts were made, the diff needs reordering and another shift sweep.
if (changes) {
this.diff_cleanupMerge(diffs);
}
};
/**
* loc is a location in text1, compute and return the equivalent location in
* text2.
* e.g. 'The cat' vs 'The big cat', 1->1, 5->8
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @param {number} loc Location within text1.
* @return {number} Location within text2.
*/
diff_match_patch.prototype.diff_xIndex = function(diffs, loc) {
var chars1 = 0;
var chars2 = 0;
var last_chars1 = 0;
var last_chars2 = 0;
var x;
for (x = 0; x < diffs.length; x++) {
if (diffs[x][0] !== DIFF_INSERT) { // Equality or deletion.
chars1 += diffs[x][1].length;
}
if (diffs[x][0] !== DIFF_DELETE) { // Equality or insertion.
chars2 += diffs[x][1].length;
}
if (chars1 > loc) { // Overshot the location.
break;
}
last_chars1 = chars1;
last_chars2 = chars2;
}
// Was the location was deleted?
if (diffs.length != x && diffs[x][0] === DIFF_DELETE) {
return last_chars2;
}
// Add the remaining character length.
return last_chars2 + (loc - last_chars1);
};
/**
* Convert a diff array into a pretty HTML report.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @return {string} HTML representation.
*/
diff_match_patch.prototype.diff_prettyHtml = function(diffs) {
var html = [];
var pattern_amp = /&/g;
var pattern_lt = /</g;
var pattern_gt = />/g;
var pattern_para = /\n/g;
for (var x = 0; x < diffs.length; x++) {
var op = diffs[x][0]; // Operation (insert, delete, equal)
var data = diffs[x][1]; // Text of change.
var text = data.replace(pattern_amp, '&amp;').replace(pattern_lt, '&lt;')
.replace(pattern_gt, '&gt;').replace(pattern_para, '&para;<br>');
switch (op) {
case DIFF_INSERT:
html[x] = '<ins style="background:#e6ffe6;">' + text + '</ins>';
break;
case DIFF_DELETE:
html[x] = '<del style="background:#ffe6e6;">' + text + '</del>';
break;
case DIFF_EQUAL:
html[x] = '<span>' + text + '</span>';
break;
}
}
return html.join('');
};
/**
* Compute and return the source text (all equalities and deletions).
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @return {string} Source text.
*/
diff_match_patch.prototype.diff_text1 = function(diffs) {
var text = [];
for (var x = 0; x < diffs.length; x++) {
if (diffs[x][0] !== DIFF_INSERT) {
text[x] = diffs[x][1];
}
}
return text.join('');
};
/**
* Compute and return the destination text (all equalities and insertions).
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @return {string} Destination text.
*/
diff_match_patch.prototype.diff_text2 = function(diffs) {
var text = [];
for (var x = 0; x < diffs.length; x++) {
if (diffs[x][0] !== DIFF_DELETE) {
text[x] = diffs[x][1];
}
}
return text.join('');
};
/**
* Compute the Levenshtein distance; the number of inserted, deleted or
* substituted characters.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @return {number} Number of changes.
*/
diff_match_patch.prototype.diff_levenshtein = function(diffs) {
var levenshtein = 0;
var insertions = 0;
var deletions = 0;
for (var x = 0; x < diffs.length; x++) {
var op = diffs[x][0];
var data = diffs[x][1];
switch (op) {
case DIFF_INSERT:
insertions += data.length;
break;
case DIFF_DELETE:
deletions += data.length;
break;
case DIFF_EQUAL:
// A deletion and an insertion is one substitution.
levenshtein += Math.max(insertions, deletions);
insertions = 0;
deletions = 0;
break;
}
}
levenshtein += Math.max(insertions, deletions);
return levenshtein;
};
/**
* Crush the diff into an encoded string which describes the operations
* required to transform text1 into text2.
* E.g. =3\t-2\t+ing -> Keep 3 chars, delete 2 chars, insert 'ing'.
* Operations are tab-separated. Inserted text is escaped using %xx notation.
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
* @return {string} Delta text.
*/
diff_match_patch.prototype.diff_toDelta = function(diffs) {
var text = [];
for (var x = 0; x < diffs.length; x++) {
switch (diffs[x][0]) {
case DIFF_INSERT:
text[x] = '+' + encodeURI(diffs[x][1]);
break;
case DIFF_DELETE:
text[x] = '-' + diffs[x][1].length;
break;
case DIFF_EQUAL:
text[x] = '=' + diffs[x][1].length;
break;
}
}
return text.join('\t').replace(/%20/g, ' ');
};
/**
* Given the original text1, and an encoded string which describes the
* operations required to transform text1 into text2, compute the full diff.
* @param {string} text1 Source string for the diff.
* @param {string} delta Delta text.
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
* @throws {!Error} If invalid input.
*/
diff_match_patch.prototype.diff_fromDelta = function(text1, delta) {
var diffs = [];
var diffsLength = 0; // Keeping our own length var is faster in JS.
var pointer = 0; // Cursor in text1
var tokens = delta.split(/\t/g);
for (var x = 0; x < tokens.length; x++) {
// Each token begins with a one character parameter which specifies the
// operation of this token (delete, insert, equality).
var param = tokens[x].substring(1);
switch (tokens[x].charAt(0)) {
case '+':
try {
diffs[diffsLength++] = [DIFF_INSERT, decodeURI(param)];
} catch (ex) {
// Malformed URI sequence.
throw new Error('Illegal escape in diff_fromDelta: ' + param);
}
break;
case '-':
// Fall through.
case '=':
var n = parseInt(param, 10);
if (isNaN(n) || n < 0) {
throw new Error('Invalid number in diff_fromDelta: ' + param);
}
var text = text1.substring(pointer, pointer += n);
if (tokens[x].charAt(0) == '=') {
diffs[diffsLength++] = [DIFF_EQUAL, text];
} else {
diffs[diffsLength++] = [DIFF_DELETE, text];
}
break;
default:
// Blank tokens are ok (from a trailing \t).
// Anything else is an error.
if (tokens[x]) {
throw new Error('Invalid diff operation in diff_fromDelta: ' +
tokens[x]);
}
}
}
if (pointer != text1.length) {
throw new Error('Delta length (' + pointer +
') does not equal source text length (' + text1.length + ').');
}
return diffs;
};
// MATCH FUNCTIONS
/**
* Locate the best instance of 'pattern' in 'text' near 'loc'.
* @param {string} text The text to search.
* @param {string} pattern The pattern to search for.
* @param {number} loc The location to search around.
* @return {number} Best match index or -1.
*/
diff_match_patch.prototype.match_main = function(text, pattern, loc) {
// Check for null inputs.
if (text == null || pattern == null || loc == null) {
throw new Error('Null input. (match_main)');
}
loc = Math.max(0, Math.min(loc, text.length));
if (text == pattern) {
// Shortcut (potentially not guaranteed by the algorithm)
return 0;
} else if (!text.length) {
// Nothing to match.
return -1;
} else if (text.substring(loc, loc + pattern.length) == pattern) {
// Perfect match at the perfect spot! (Includes case of null pattern)
return loc;
} else {
// Do a fuzzy compare.
return this.match_bitap_(text, pattern, loc);
}
};
/**
* Locate the best instance of 'pattern' in 'text' near 'loc' using the
* Bitap algorithm.
* @param {string} text The text to search.
* @param {string} pattern The pattern to search for.
* @param {number} loc The location to search around.
* @return {number} Best match index or -1.
* @private
*/
diff_match_patch.prototype.match_bitap_ = function(text, pattern, loc) {
if (pattern.length > this.Match_MaxBits) {
throw new Error('Pattern too long for this browser.');
}
// Initialise the alphabet.
var s = this.match_alphabet_(pattern);
var dmp = this; // 'this' becomes 'window' in a closure.
/**
* Compute and return the score for a match with e errors and x location.
* Accesses loc and pattern through being a closure.
* @param {number} e Number of errors in match.
* @param {number} x Location of match.
* @return {number} Overall score for match (0.0 = good, 1.0 = bad).
* @private
*/
function match_bitapScore_(e, x) {
var accuracy = e / pattern.length;
var proximity = Math.abs(loc - x);
if (!dmp.Match_Distance) {
// Dodge divide by zero error.
return proximity ? 1.0 : accuracy;
}
return accuracy + (proximity / dmp.Match_Distance);
}
// Highest score beyond which we give up.
var score_threshold = this.Match_Threshold;
// Is there a nearby exact match? (speedup)
var best_loc = text.indexOf(pattern, loc);
if (best_loc != -1) {
score_threshold = Math.min(match_bitapScore_(0, best_loc), score_threshold);
// What about in the other direction? (speedup)
best_loc = text.lastIndexOf(pattern, loc + pattern.length);
if (best_loc != -1) {
score_threshold =
Math.min(match_bitapScore_(0, best_loc), score_threshold);
}
}
// Initialise the bit arrays.
var matchmask = 1 << (pattern.length - 1);
best_loc = -1;
var bin_min, bin_mid;
var bin_max = pattern.length + text.length;
var last_rd;
for (var d = 0; d < pattern.length; d++) {
// Scan for the best match; each iteration allows for one more error.
// Run a binary search to determine how far from 'loc' we can stray at this
// error level.
bin_min = 0;
bin_mid = bin_max;
while (bin_min < bin_mid) {
if (match_bitapScore_(d, loc + bin_mid) <= score_threshold) {
bin_min = bin_mid;
} else {
bin_max = bin_mid;
}
bin_mid = Math.floor((bin_max - bin_min) / 2 + bin_min);
}
// Use the result from this iteration as the maximum for the next.
bin_max = bin_mid;
var start = Math.max(1, loc - bin_mid + 1);
var finish = Math.min(loc + bin_mid, text.length) + pattern.length;
var rd = Array(finish + 2);
rd[finish + 1] = (1 << d) - 1;
for (var j = finish; j >= start; j--) {
// The alphabet (s) is a sparse hash, so the following line generates
// warnings.
var charMatch = s[text.charAt(j - 1)];
if (d === 0) { // First pass: exact match.
rd[j] = ((rd[j + 1] << 1) | 1) & charMatch;
} else { // Subsequent passes: fuzzy match.
rd[j] = ((rd[j + 1] << 1) | 1) & charMatch |
(((last_rd[j + 1] | last_rd[j]) << 1) | 1) |
last_rd[j + 1];
}
if (rd[j] & matchmask) {
var score = match_bitapScore_(d, j - 1);
// This match will almost certainly be better than any existing match.
// But check anyway.
if (score <= score_threshold) {
// Told you so.
score_threshold = score;
best_loc = j - 1;
if (best_loc > loc) {
// When passing loc, don't exceed our current distance from loc.
start = Math.max(1, 2 * loc - best_loc);
} else {
// Already passed loc, downhill from here on in.
break;
}
}
}
}
// No hope for a (better) match at greater error levels.
if (match_bitapScore_(d + 1, loc) > score_threshold) {
break;
}
last_rd = rd;
}
return best_loc;
};
/**
* Initialise the alphabet for the Bitap algorithm.
* @param {string} pattern The text to encode.
* @return {!Object} Hash of character locations.
* @private
*/
diff_match_patch.prototype.match_alphabet_ = function(pattern) {
var s = {};
for (var i = 0; i < pattern.length; i++) {
s[pattern.charAt(i)] = 0;
}
for (var i = 0; i < pattern.length; i++) {
s[pattern.charAt(i)] |= 1 << (pattern.length - i - 1);
}
return s;
};
// PATCH FUNCTIONS
/**
* Increase the context until it is unique,
* but don't let the pattern expand beyond Match_MaxBits.
* @param {!diff_match_patch.patch_obj} patch The patch to grow.
* @param {string} text Source text.
* @private
*/
diff_match_patch.prototype.patch_addContext_ = function(patch, text) {
if (text.length == 0) {
return;
}
var pattern = text.substring(patch.start2, patch.start2 + patch.length1);
var padding = 0;
// Look for the first and last matches of pattern in text. If two different
// matches are found, increase the pattern length.
while (text.indexOf(pattern) != text.lastIndexOf(pattern) &&
pattern.length < this.Match_MaxBits - this.Patch_Margin -
this.Patch_Margin) {
padding += this.Patch_Margin;
pattern = text.substring(patch.start2 - padding,
patch.start2 + patch.length1 + padding);
}
// Add one chunk for good luck.
padding += this.Patch_Margin;
// Add the prefix.
var prefix = text.substring(patch.start2 - padding, patch.start2);
if (prefix) {
patch.diffs.unshift([DIFF_EQUAL, prefix]);
}
// Add the suffix.
var suffix = text.substring(patch.start2 + patch.length1,
patch.start2 + patch.length1 + padding);
if (suffix) {
patch.diffs.push([DIFF_EQUAL, suffix]);
}
// Roll back the start points.
patch.start1 -= prefix.length;
patch.start2 -= prefix.length;
// Extend the lengths.
patch.length1 += prefix.length + suffix.length;
patch.length2 += prefix.length + suffix.length;
};
/**
* Compute a list of patches to turn text1 into text2.
* Use diffs if provided, otherwise compute it ourselves.
* There are four ways to call this function, depending on what data is
* available to the caller:
* Method 1:
* a = text1, b = text2
* Method 2:
* a = diffs
* Method 3 (optimal):
* a = text1, b = diffs
* Method 4 (deprecated, use method 3):
* a = text1, b = text2, c = diffs
*
* @param {string|!Array.<!diff_match_patch.Diff>} a text1 (methods 1,3,4) or
* Array of diff tuples for text1 to text2 (method 2).
* @param {string|!Array.<!diff_match_patch.Diff>} opt_b text2 (methods 1,4) or
* Array of diff tuples for text1 to text2 (method 3) or undefined (method 2).
* @param {string|!Array.<!diff_match_patch.Diff>} opt_c Array of diff tuples
* for text1 to text2 (method 4) or undefined (methods 1,2,3).
* @return {!Array.<!diff_match_patch.patch_obj>} Array of patch objects.
*/
diff_match_patch.prototype.patch_make = function(a, opt_b, opt_c) {
var text1, diffs;
if (typeof a == 'string' && typeof opt_b == 'string' &&
typeof opt_c == 'undefined') {
// Method 1: text1, text2
// Compute diffs from text1 and text2.
text1 = /** @type {string} */(a);
diffs = this.diff_main(text1, /** @type {string} */(opt_b), true);
if (diffs.length > 2) {
this.diff_cleanupSemantic(diffs);
this.diff_cleanupEfficiency(diffs);
}
} else if (a && typeof a == 'object' && typeof opt_b == 'undefined' &&
typeof opt_c == 'undefined') {
// Method 2: diffs
// Compute text1 from diffs.
diffs = /** @type {!Array.<!diff_match_patch.Diff>} */(a);
text1 = this.diff_text1(diffs);
} else if (typeof a == 'string' && opt_b && typeof opt_b == 'object' &&
typeof opt_c == 'undefined') {
// Method 3: text1, diffs
text1 = /** @type {string} */(a);
diffs = /** @type {!Array.<!diff_match_patch.Diff>} */(opt_b);
} else if (typeof a == 'string' && typeof opt_b == 'string' &&
opt_c && typeof opt_c == 'object') {
// Method 4: text1, text2, diffs
// text2 is not used.
text1 = /** @type {string} */(a);
diffs = /** @type {!Array.<!diff_match_patch.Diff>} */(opt_c);
} else {
throw new Error('Unknown call format to patch_make.');
}
if (diffs.length === 0) {
return []; // Get rid of the null case.
}
var patches = [];
var patch = new diff_match_patch.patch_obj();
var patchDiffLength = 0; // Keeping our own length var is faster in JS.
var char_count1 = 0; // Number of characters into the text1 string.
var char_count2 = 0; // Number of characters into the text2 string.
// Start with text1 (prepatch_text) and apply the diffs until we arrive at
// text2 (postpatch_text). We recreate the patches one by one to determine
// context info.
var prepatch_text = text1;
var postpatch_text = text1;
for (var x = 0; x < diffs.length; x++) {
var diff_type = diffs[x][0];
var diff_text = diffs[x][1];
if (!patchDiffLength && diff_type !== DIFF_EQUAL) {
// A new patch starts here.
patch.start1 = char_count1;
patch.start2 = char_count2;
}
switch (diff_type) {
case DIFF_INSERT:
patch.diffs[patchDiffLength++] = diffs[x];
patch.length2 += diff_text.length;
postpatch_text = postpatch_text.substring(0, char_count2) + diff_text +
postpatch_text.substring(char_count2);
break;
case DIFF_DELETE:
patch.length1 += diff_text.length;
patch.diffs[patchDiffLength++] = diffs[x];
postpatch_text = postpatch_text.substring(0, char_count2) +
postpatch_text.substring(char_count2 +
diff_text.length);
break;
case DIFF_EQUAL:
if (diff_text.length <= 2 * this.Patch_Margin &&
patchDiffLength && diffs.length != x + 1) {
// Small equality inside a patch.
patch.diffs[patchDiffLength++] = diffs[x];
patch.length1 += diff_text.length;
patch.length2 += diff_text.length;
} else if (diff_text.length >= 2 * this.Patch_Margin) {
// Time for a new patch.
if (patchDiffLength) {
this.patch_addContext_(patch, prepatch_text);
patches.push(patch);
patch = new diff_match_patch.patch_obj();
patchDiffLength = 0;
// Unlike Unidiff, our patch lists have a rolling context.
// http://code.google.com/p/google-diff-match-patch/wiki/Unidiff
// Update prepatch text & pos to reflect the application of the
// just completed patch.
prepatch_text = postpatch_text;
char_count1 = char_count2;
}
}
break;
}
// Update the current character count.
if (diff_type !== DIFF_INSERT) {
char_count1 += diff_text.length;
}
if (diff_type !== DIFF_DELETE) {
char_count2 += diff_text.length;
}
}
// Pick up the leftover patch if not empty.
if (patchDiffLength) {
this.patch_addContext_(patch, prepatch_text);
patches.push(patch);
}
return patches;
};
/**
* Given an array of patches, return another array that is identical.
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
* @return {!Array.<!diff_match_patch.patch_obj>} Array of patch objects.
*/
diff_match_patch.prototype.patch_deepCopy = function(patches) {
// Making deep copies is hard in JavaScript.
var patchesCopy = [];
for (var x = 0; x < patches.length; x++) {
var patch = patches[x];
var patchCopy = new diff_match_patch.patch_obj();
patchCopy.diffs = [];
for (var y = 0; y < patch.diffs.length; y++) {
patchCopy.diffs[y] = patch.diffs[y].slice();
}
patchCopy.start1 = patch.start1;
patchCopy.start2 = patch.start2;
patchCopy.length1 = patch.length1;
patchCopy.length2 = patch.length2;
patchesCopy[x] = patchCopy;
}
return patchesCopy;
};
/**
* Merge a set of patches onto the text. Return a patched text, as well
* as a list of true/false values indicating which patches were applied.
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
* @param {string} text Old text.
* @return {!Array.<string|!Array.<boolean>>} Two element Array, containing the
* new text and an array of boolean values.
*/
diff_match_patch.prototype.patch_apply = function(patches, text) {
if (patches.length == 0) {
return [text, []];
}
// Deep copy the patches so that no changes are made to originals.
patches = this.patch_deepCopy(patches);
var nullPadding = this.patch_addPadding(patches);
text = nullPadding + text + nullPadding;
this.patch_splitMax(patches);
// delta keeps track of the offset between the expected and actual location
// of the previous patch. If there are patches expected at positions 10 and
// 20, but the first patch was found at 12, delta is 2 and the second patch
// has an effective expected position of 22.
var delta = 0;
var results = [];
for (var x = 0; x < patches.length; x++) {
var expected_loc = patches[x].start2 + delta;
var text1 = this.diff_text1(patches[x].diffs);
var start_loc;
var end_loc = -1;
if (text1.length > this.Match_MaxBits) {
// patch_splitMax will only provide an oversized pattern in the case of
// a monster delete.
start_loc = this.match_main(text, text1.substring(0, this.Match_MaxBits),
expected_loc);
if (start_loc != -1) {
end_loc = this.match_main(text,
text1.substring(text1.length - this.Match_MaxBits),
expected_loc + text1.length - this.Match_MaxBits);
if (end_loc == -1 || start_loc >= end_loc) {
// Can't find valid trailing context. Drop this patch.
start_loc = -1;
}
}
} else {
start_loc = this.match_main(text, text1, expected_loc);
}
if (start_loc == -1) {
// No match found. :(
results[x] = false;
// Subtract the delta for this failed patch from subsequent patches.
delta -= patches[x].length2 - patches[x].length1;
} else {
// Found a match. :)
results[x] = true;
delta = start_loc - expected_loc;
var text2;
if (end_loc == -1) {
text2 = text.substring(start_loc, start_loc + text1.length);
} else {
text2 = text.substring(start_loc, end_loc + this.Match_MaxBits);
}
if (text1 == text2) {
// Perfect match, just shove the replacement text in.
text = text.substring(0, start_loc) +
this.diff_text2(patches[x].diffs) +
text.substring(start_loc + text1.length);
} else {
// Imperfect match. Run a diff to get a framework of equivalent
// indices.
var diffs = this.diff_main(text1, text2, false);
if (text1.length > this.Match_MaxBits &&
this.diff_levenshtein(diffs) / text1.length >
this.Patch_DeleteThreshold) {
// The end points match, but the content is unacceptably bad.
results[x] = false;
} else {
this.diff_cleanupSemanticLossless(diffs);
var index1 = 0;
var index2;
for (var y = 0; y < patches[x].diffs.length; y++) {
var mod = patches[x].diffs[y];
if (mod[0] !== DIFF_EQUAL) {
index2 = this.diff_xIndex(diffs, index1);
}
if (mod[0] === DIFF_INSERT) { // Insertion
text = text.substring(0, start_loc + index2) + mod[1] +
text.substring(start_loc + index2);
} else if (mod[0] === DIFF_DELETE) { // Deletion
text = text.substring(0, start_loc + index2) +
text.substring(start_loc + this.diff_xIndex(diffs,
index1 + mod[1].length));
}
if (mod[0] !== DIFF_DELETE) {
index1 += mod[1].length;
}
}
}
}
}
}
// Strip the padding off.
text = text.substring(nullPadding.length, text.length - nullPadding.length);
return [text, results];
};
/**
* Add some padding on text start and end so that edges can match something.
* Intended to be called only from within patch_apply.
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
* @return {string} The padding string added to each side.
*/
diff_match_patch.prototype.patch_addPadding = function(patches) {
var paddingLength = this.Patch_Margin;
var nullPadding = '';
for (var x = 1; x <= paddingLength; x++) {
nullPadding += String.fromCharCode(x);
}
// Bump all the patches forward.
for (var x = 0; x < patches.length; x++) {
patches[x].start1 += paddingLength;
patches[x].start2 += paddingLength;
}
// Add some padding on start of first diff.
var patch = patches[0];
var diffs = patch.diffs;
if (diffs.length == 0 || diffs[0][0] != DIFF_EQUAL) {
// Add nullPadding equality.
diffs.unshift([DIFF_EQUAL, nullPadding]);
patch.start1 -= paddingLength; // Should be 0.
patch.start2 -= paddingLength; // Should be 0.
patch.length1 += paddingLength;
patch.length2 += paddingLength;
} else if (paddingLength > diffs[0][1].length) {
// Grow first equality.
var extraLength = paddingLength - diffs[0][1].length;
diffs[0][1] = nullPadding.substring(diffs[0][1].length) + diffs[0][1];
patch.start1 -= extraLength;
patch.start2 -= extraLength;
patch.length1 += extraLength;
patch.length2 += extraLength;
}
// Add some padding on end of last diff.
patch = patches[patches.length - 1];
diffs = patch.diffs;
if (diffs.length == 0 || diffs[diffs.length - 1][0] != DIFF_EQUAL) {
// Add nullPadding equality.
diffs.push([DIFF_EQUAL, nullPadding]);
patch.length1 += paddingLength;
patch.length2 += paddingLength;
} else if (paddingLength > diffs[diffs.length - 1][1].length) {
// Grow last equality.
var extraLength = paddingLength - diffs[diffs.length - 1][1].length;
diffs[diffs.length - 1][1] += nullPadding.substring(0, extraLength);
patch.length1 += extraLength;
patch.length2 += extraLength;
}
return nullPadding;
};
/**
* Look through the patches and break up any which are longer than the maximum
* limit of the match algorithm.
* Intended to be called only from within patch_apply.
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
*/
diff_match_patch.prototype.patch_splitMax = function(patches) {
var patch_size = this.Match_MaxBits;
for (var x = 0; x < patches.length; x++) {
if (patches[x].length1 > patch_size) {
var bigpatch = patches[x];
// Remove the big old patch.
patches.splice(x--, 1);
var start1 = bigpatch.start1;
var start2 = bigpatch.start2;
var precontext = '';
while (bigpatch.diffs.length !== 0) {
// Create one of several smaller patches.
var patch = new diff_match_patch.patch_obj();
var empty = true;
patch.start1 = start1 - precontext.length;
patch.start2 = start2 - precontext.length;
if (precontext !== '') {
patch.length1 = patch.length2 = precontext.length;
patch.diffs.push([DIFF_EQUAL, precontext]);
}
while (bigpatch.diffs.length !== 0 &&
patch.length1 < patch_size - this.Patch_Margin) {
var diff_type = bigpatch.diffs[0][0];
var diff_text = bigpatch.diffs[0][1];
if (diff_type === DIFF_INSERT) {
// Insertions are harmless.
patch.length2 += diff_text.length;
start2 += diff_text.length;
patch.diffs.push(bigpatch.diffs.shift());
empty = false;
} else if (diff_type === DIFF_DELETE && patch.diffs.length == 1 &&
patch.diffs[0][0] == DIFF_EQUAL &&
diff_text.length > 2 * patch_size) {
// This is a large deletion. Let it pass in one chunk.
patch.length1 += diff_text.length;
start1 += diff_text.length;
empty = false;
patch.diffs.push([diff_type, diff_text]);
bigpatch.diffs.shift();
} else {
// Deletion or equality. Only take as much as we can stomach.
diff_text = diff_text.substring(0,
patch_size - patch.length1 - this.Patch_Margin);
patch.length1 += diff_text.length;
start1 += diff_text.length;
if (diff_type === DIFF_EQUAL) {
patch.length2 += diff_text.length;
start2 += diff_text.length;
} else {
empty = false;
}
patch.diffs.push([diff_type, diff_text]);
if (diff_text == bigpatch.diffs[0][1]) {
bigpatch.diffs.shift();
} else {
bigpatch.diffs[0][1] =
bigpatch.diffs[0][1].substring(diff_text.length);
}
}
}
// Compute the head context for the next patch.
precontext = this.diff_text2(patch.diffs);
precontext =
precontext.substring(precontext.length - this.Patch_Margin);
// Append the end context for this patch.
var postcontext = this.diff_text1(bigpatch.diffs)
.substring(0, this.Patch_Margin);
if (postcontext !== '') {
patch.length1 += postcontext.length;
patch.length2 += postcontext.length;
if (patch.diffs.length !== 0 &&
patch.diffs[patch.diffs.length - 1][0] === DIFF_EQUAL) {
patch.diffs[patch.diffs.length - 1][1] += postcontext;
} else {
patch.diffs.push([DIFF_EQUAL, postcontext]);
}
}
if (!empty) {
patches.splice(++x, 0, patch);
}
}
}
}
};
/**
* Take a list of patches and return a textual representation.
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
* @return {string} Text representation of patches.
*/
diff_match_patch.prototype.patch_toText = function(patches) {
var text = [];
for (var x = 0; x < patches.length; x++) {
text[x] = patches[x];
}
return text.join('');
};
/**
* Parse a textual representation of patches and return a list of patch objects.
* @param {string} textline Text representation of patches.
* @return {!Array.<!diff_match_patch.patch_obj>} Array of patch objects.
* @throws {!Error} If invalid input.
*/
diff_match_patch.prototype.patch_fromText = function(textline) {
var patches = [];
if (!textline) {
return patches;
}
var text = textline.split('\n');
var textPointer = 0;
var patchHeader = /^@@ -(\d+),?(\d*) \+(\d+),?(\d*) @@$/;
while (textPointer < text.length) {
var m = text[textPointer].match(patchHeader);
if (!m) {
throw new Error('Invalid patch string: ' + text[textPointer]);
}
var patch = new diff_match_patch.patch_obj();
patches.push(patch);
patch.start1 = parseInt(m[1], 10);
if (m[2] === '') {
patch.start1--;
patch.length1 = 1;
} else if (m[2] == '0') {
patch.length1 = 0;
} else {
patch.start1--;
patch.length1 = parseInt(m[2], 10);
}
patch.start2 = parseInt(m[3], 10);
if (m[4] === '') {
patch.start2--;
patch.length2 = 1;
} else if (m[4] == '0') {
patch.length2 = 0;
} else {
patch.start2--;
patch.length2 = parseInt(m[4], 10);
}
textPointer++;
while (textPointer < text.length) {
var sign = text[textPointer].charAt(0);
try {
var line = decodeURI(text[textPointer].substring(1));
} catch (ex) {
// Malformed URI sequence.
throw new Error('Illegal escape in patch_fromText: ' + line);
}
if (sign == '-') {
// Deletion.
patch.diffs.push([DIFF_DELETE, line]);
} else if (sign == '+') {
// Insertion.
patch.diffs.push([DIFF_INSERT, line]);
} else if (sign == ' ') {
// Minor equality.
patch.diffs.push([DIFF_EQUAL, line]);
} else if (sign == '@') {
// Start of next patch.
break;
} else if (sign === '') {
// Blank line? Whatever.
} else {
// WTF?
throw new Error('Invalid patch mode "' + sign + '" in: ' + line);
}
textPointer++;
}
}
return patches;
};
/**
* Class representing one patch operation.
* @constructor
*/
diff_match_patch.patch_obj = function() {
/** @type {!Array.<!diff_match_patch.Diff>} */
this.diffs = [];
/** @type {?number} */
this.start1 = null;
/** @type {?number} */
this.start2 = null;
/** @type {number} */
this.length1 = 0;
/** @type {number} */
this.length2 = 0;
};
/**
* Emmulate GNU diff's format.
* Header: @@ -382,8 +481,9 @@
* Indicies are printed as 1-based, not 0-based.
* @return {string} The GNU diff string.
*/
diff_match_patch.patch_obj.prototype.toString = function() {
var coords1, coords2;
if (this.length1 === 0) {
coords1 = this.start1 + ',0';
} else if (this.length1 == 1) {
coords1 = this.start1 + 1;
} else {
coords1 = (this.start1 + 1) + ',' + this.length1;
}
if (this.length2 === 0) {
coords2 = this.start2 + ',0';
} else if (this.length2 == 1) {
coords2 = this.start2 + 1;
} else {
coords2 = (this.start2 + 1) + ',' + this.length2;
}
var text = ['@@ -' + coords1 + ' +' + coords2 + ' @@\n'];
var op;
// Escape the body of the patch with %xx notation.
for (var x = 0; x < this.diffs.length; x++) {
switch (this.diffs[x][0]) {
case DIFF_INSERT:
op = '+';
break;
case DIFF_DELETE:
op = '-';
break;
case DIFF_EQUAL:
op = ' ';
break;
}
text[x + 1] = op + encodeURI(this.diffs[x][1]) + '\n';
}
return text.join('').replace(/%20/g, ' ');
};
// Export these global variables so that they survive Google's JS compiler.
// In a browser, 'this' will be 'window'.
// Users of node.js should 'require' the uncompressed version since Google's
// JS compiler may break the following exports for non-browser environments.
this['diff_match_patch'] = diff_match_patch;
this['DIFF_DELETE'] = DIFF_DELETE;
this['DIFF_INSERT'] = DIFF_INSERT;
this['DIFF_EQUAL'] = DIFF_EQUAL`
`/*!
* jQuery JavaScript Library v1.7.1
* http://jquery.com/
*
* Copyright 2011, John Resig
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* Includes Sizzle.js
* http://sizzlejs.com/
* Copyright 2011, The Dojo Foundation
* Released under the MIT, BSD, and GPL Licenses.
*
* Date: Mon Nov 21 21:11:03 2011 -0500
*/
(function( window, undefined ) {
// Use the correct document accordingly with window argument (sandbox)
var document = window.document,
navigator = window.navigator,
location = window.location;
var jQuery = (function() {
// Define a local copy of jQuery
var jQuery = function( selector, context ) {
// The jQuery object is actually just the init constructor 'enhanced'
return new jQuery.fn.init( selector, context, rootjQuery );
},
// Map over jQuery in case of overwrite
_jQuery = window.jQuery,
// Map over the $ in case of overwrite
_$ = window.$,
// A central reference to the root jQuery(document)
rootjQuery,
// A simple way to check for HTML strings or ID strings
// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
quickExpr = /^(?:[^#<]*(<[\w\W]+>)[^>]*$|#([\w\-]*)$)/,
// Check if a string has a non-whitespace character in it
rnotwhite = /\S/,
// Used for trimming whitespace
trimLeft = /^\s+/,
trimRight = /\s+$/,
// Match a standalone tag
rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/,
// JSON RegExp
rvalidchars = /^[\],:{}\s]*$/,
rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
// Useragent RegExp
rwebkit = /(webkit)[ \/]([\w.]+)/,
ropera = /(opera)(?:.*version)?[ \/]([\w.]+)/,
rmsie = /(msie) ([\w.]+)/,
rmozilla = /(mozilla)(?:.*? rv:([\w.]+))?/,
// Matches dashed string for camelizing
rdashAlpha = /-([a-z]|[0-9])/ig,
rmsPrefix = /^-ms-/,
// Used by jQuery.camelCase as callback to replace()
fcamelCase = function( all, letter ) {
return ( letter + "" ).toUpperCase();
},
// Keep a UserAgent string for use with jQuery.browser
userAgent = navigator.userAgent,
// For matching the engine and version of the browser
browserMatch,
// The deferred used on DOM ready
readyList,
// The ready event handler
DOMContentLoaded,
// Save a reference to some core methods
toString = Object.prototype.toString,
hasOwn = Object.prototype.hasOwnProperty,
push = Array.prototype.push,
slice = Array.prototype.slice,
trim = String.prototype.trim,
indexOf = Array.prototype.indexOf,
// [[Class]] -> type pairs
class2type = {};
jQuery.fn = jQuery.prototype = {
constructor: jQuery,
init: function( selector, context, rootjQuery ) {
var match, elem, ret, doc;
// Handle $(""), $(null), or $(undefined)
if ( !selector ) {
return this;
}
// Handle $(DOMElement)
if ( selector.nodeType ) {
this.context = this[0] = selector;
this.length = 1;
return this;
}
// The body element only exists once, optimize finding it
if ( selector === "body" && !context && document.body ) {
this.context = document;
this[0] = document.body;
this.selector = selector;
this.length = 1;
return this;
}
// Handle HTML strings
if ( typeof selector === "string" ) {
// Are we dealing with HTML string or an ID?
if ( selector.charAt(0) === "<" && selector.charAt( selector.length - 1 ) === ">" && selector.length >= 3 ) {
// Assume that strings that start and end with <> are HTML and skip the regex check
match = [ null, selector, null ];
} else {
match = quickExpr.exec( selector );
}
// Verify a match, and that no context was specified for #id
if ( match && (match[1] || !context) ) {
// HANDLE: $(html) -> $(array)
if ( match[1] ) {
context = context instanceof jQuery ? context[0] : context;
doc = ( context ? context.ownerDocument || context : document );
// If a single string is passed in and it's a single tag
// just do a createElement and skip the rest
ret = rsingleTag.exec( selector );
if ( ret ) {
if ( jQuery.isPlainObject( context ) ) {
selector = [ document.createElement( ret[1] ) ];
jQuery.fn.attr.call( selector, context, true );
} else {
selector = [ doc.createElement( ret[1] ) ];
}
} else {
ret = jQuery.buildFragment( [ match[1] ], [ doc ] );
selector = ( ret.cacheable ? jQuery.clone(ret.fragment) : ret.fragment ).childNodes;
}
return jQuery.merge( this, selector );
// HANDLE: $("#id")
} else {
elem = document.getElementById( match[2] );
// Check parentNode to catch when Blackberry 4.6 returns
// nodes that are no longer in the document #6963
if ( elem && elem.parentNode ) {
// Handle the case where IE and Opera return items
// by name instead of ID
if ( elem.id !== match[2] ) {
return rootjQuery.find( selector );
}
// Otherwise, we inject the element directly into the jQuery object
this.length = 1;
this[0] = elem;
}
this.context = document;
this.selector = selector;
return this;
}
// HANDLE: $(expr, $(...))
} else if ( !context || context.jquery ) {
return ( context || rootjQuery ).find( selector );
// HANDLE: $(expr, context)
// (which is just equivalent to: $(context).find(expr)
} else {
return this.constructor( context ).find( selector );
}
// HANDLE: $(function)
// Shortcut for document ready
} else if ( jQuery.isFunction( selector ) ) {
return rootjQuery.ready( selector );
}
if ( selector.selector !== undefined ) {
this.selector = selector.selector;
this.context = selector.context;
}
return jQuery.makeArray( selector, this );
},
// Start with an empty selector
selector: "",
// The current version of jQuery being used
jquery: "1.7.1",
// The default length of a jQuery object is 0
length: 0,
// The number of elements contained in the matched element set
size: function() {
return this.length;
},
toArray: function() {
return slice.call( this, 0 );
},
// Get the Nth element in the matched element set OR
// Get the whole matched element set as a clean array
get: function( num ) {
return num == null ?
// Return a 'clean' array
this.toArray() :
// Return just the object
( num < 0 ? this[ this.length + num ] : this[ num ] );
},
// Take an array of elements and push it onto the stack
// (returning the new matched element set)
pushStack: function( elems, name, selector ) {
// Build a new jQuery matched element set
var ret = this.constructor();
if ( jQuery.isArray( elems ) ) {
push.apply( ret, elems );
} else {
jQuery.merge( ret, elems );
}
// Add the old object onto the stack (as a reference)
ret.prevObject = this;
ret.context = this.context;
if ( name === "find" ) {
ret.selector = this.selector + ( this.selector ? " " : "" ) + selector;
} else if ( name ) {
ret.selector = this.selector + "." + name + "(" + selector + ")";
}
// Return the newly-formed element set
return ret;
},
// Execute a callback for every element in the matched set.
// (You can seed the arguments with an array of args, but this is
// only used internally.)
each: function( callback, args ) {
return jQuery.each( this, callback, args );
},
ready: function( fn ) {
// Attach the listeners
jQuery.bindReady();
// Add the callback
readyList.add( fn );
return this;
},
eq: function( i ) {
i = +i;
return i === -1 ?
this.slice( i ) :
this.slice( i, i + 1 );
},
first: function() {
return this.eq( 0 );
},
last: function() {
return this.eq( -1 );
},
slice: function() {
return this.pushStack( slice.apply( this, arguments ),
"slice", slice.call(arguments).join(",") );
},
map: function( callback ) {
return this.pushStack( jQuery.map(this, function( elem, i ) {
return callback.call( elem, i, elem );
}));
},
end: function() {
return this.prevObject || this.constructor(null);
},
// For internal use only.
// Behaves like an Array's method, not like a jQuery method.
push: push,
sort: [].sort,
splice: [].splice
};
// Give the init function the jQuery prototype for later instantiation
jQuery.fn.init.prototype = jQuery.fn;
jQuery.extend = jQuery.fn.extend = function() {
var options, name, src, copy, copyIsArray, clone,
target = arguments[0] || {},
i = 1,
length = arguments.length,
deep = false;
// Handle a deep copy situation
if ( typeof target === "boolean" ) {
deep = target;
target = arguments[1] || {};
// skip the boolean and the target
i = 2;
}
// Handle case when target is a string or something (possible in deep copy)
if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
target = {};
}
// extend jQuery itself if only one argument is passed
if ( length === i ) {
target = this;
--i;
}
for ( ; i < length; i++ ) {
// Only deal with non-null/undefined values
if ( (options = arguments[ i ]) != null ) {
// Extend the base object
for ( name in options ) {
src = target[ name ];
copy = options[ name ];
// Prevent never-ending loop
if ( target === copy ) {
continue;
}
// Recurse if we're merging plain objects or arrays
if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
if ( copyIsArray ) {
copyIsArray = false;
clone = src && jQuery.isArray(src) ? src : [];
} else {
clone = src && jQuery.isPlainObject(src) ? src : {};
}
// Never move original objects, clone them
target[ name ] = jQuery.extend( deep, clone, copy );
// Don't bring in undefined values
} else if ( copy !== undefined ) {
target[ name ] = copy;
}
}
}
}
// Return the modified object
return target;
};
jQuery.extend({
noConflict: function( deep ) {
if ( window.$ === jQuery ) {
window.$ = _$;
}
if ( deep && window.jQuery === jQuery ) {
window.jQuery = _jQuery;
}
return jQuery;
},
// Is the DOM ready to be used? Set to true once it occurs.
isReady: false,
// A counter to track how many items to wait for before
// the ready event fires. See #6781
readyWait: 1,
// Hold (or release) the ready event
holdReady: function( hold ) {
if ( hold ) {
jQuery.readyWait++;
} else {
jQuery.ready( true );
}
},
// Handle when the DOM is ready
ready: function( wait ) {
// Either a released hold or an DOMready/load event and not yet ready
if ( (wait === true && !--jQuery.readyWait) || (wait !== true && !jQuery.isReady) ) {
// Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
if ( !document.body ) {
return setTimeout( jQuery.ready, 1 );
}
// Remember that the DOM is ready
jQuery.isReady = true;
// If a normal DOM Ready event fired, decrement, and wait if need be
if ( wait !== true && --jQuery.readyWait > 0 ) {
return;
}
// If there are functions bound, to execute
readyList.fireWith( document, [ jQuery ] );
// Trigger any bound ready events
if ( jQuery.fn.trigger ) {
jQuery( document ).trigger( "ready" ).off( "ready" );
}
}
},
bindReady: function() {
if ( readyList ) {
return;
}
readyList = jQuery.Callbacks( "once memory" );
// Catch cases where $(document).ready() is called after the
// browser event has already occurred.
if ( document.readyState === "complete" ) {
// Handle it asynchronously to allow scripts the opportunity to delay ready
return setTimeout( jQuery.ready, 1 );
}
// Mozilla, Opera and webkit nightlies currently support this event
if ( document.addEventListener ) {
// Use the handy event callback
document.addEventListener( "DOMContentLoaded", DOMContentLoaded, false );
// A fallback to window.onload, that will always work
window.addEventListener( "load", jQuery.ready, false );
// If IE event model is used
} else if ( document.attachEvent ) {
// ensure firing before onload,
// maybe late but safe also for iframes
document.attachEvent( "onreadystatechange", DOMContentLoaded );
// A fallback to window.onload, that will always work
window.attachEvent( "onload", jQuery.ready );
// If IE and not a frame
// continually check to see if the document is ready
var toplevel = false;
try {
toplevel = window.frameElement == null;
} catch(e) {}
if ( document.documentElement.doScroll && toplevel ) {
doScrollCheck();
}
}
},
// See test/unit/core.js for details concerning isFunction.
// Since version 1.3, DOM methods and functions like alert
// aren't supported. They return false on IE (#2968).
isFunction: function( obj ) {
return jQuery.type(obj) === "function";
},
isArray: Array.isArray || function( obj ) {
return jQuery.type(obj) === "array";
},
// A crude way of determining if an object is a window
isWindow: function( obj ) {
return obj && typeof obj === "object" && "setInterval" in obj;
},
isNumeric: function( obj ) {
return !isNaN( parseFloat(obj) ) && isFinite( obj );
},
type: function( obj ) {
return obj == null ?
String( obj ) :
class2type[ toString.call(obj) ] || "object";
},
isPlainObject: function( obj ) {
// Must be an Object.
// Because of IE, we also have to check the presence of the constructor property.
// Make sure that DOM nodes and window objects don't pass through, as well
if ( !obj || jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
return false;
}
try {
// Not own constructor property must be Object
if ( obj.constructor &&
!hasOwn.call(obj, "constructor") &&
!hasOwn.call(obj.constructor.prototype, "isPrototypeOf") ) {
return false;
}
} catch ( e ) {
// IE8,9 Will throw exceptions on certain host objects #9897
return false;
}
// Own properties are enumerated firstly, so to speed up,
// if last one is own, then all properties are own.
var key;
for ( key in obj ) {}
return key === undefined || hasOwn.call( obj, key );
},
isEmptyObject: function( obj ) {
for ( var name in obj ) {
return false;
}
return true;
},
error: function( msg ) {
throw new Error( msg );
},
parseJSON: function( data ) {
if ( typeof data !== "string" || !data ) {
return null;
}
// Make sure leading/trailing whitespace is removed (IE can't handle it)
data = jQuery.trim( data );
// Attempt to parse using the native JSON parser first
if ( window.JSON && window.JSON.parse ) {
return window.JSON.parse( data );
}
// Make sure the incoming data is actual JSON
// Logic borrowed from http://json.org/json2.js
if ( rvalidchars.test( data.replace( rvalidescape, "@" )
.replace( rvalidtokens, "]" )
.replace( rvalidbraces, "")) ) {
return ( new Function( "return " + data ) )();
}
jQuery.error( "Invalid JSON: " + data );
},
// Cross-browser xml parsing
parseXML: function( data ) {
var xml, tmp;
try {
if ( window.DOMParser ) { // Standard
tmp = new DOMParser();
xml = tmp.parseFromString( data , "text/xml" );
} else { // IE
xml = new ActiveXObject( "Microsoft.XMLDOM" );
xml.async = "false";
xml.loadXML( data );
}
} catch( e ) {
xml = undefined;
}
if ( !xml || !xml.documentElement || xml.getElementsByTagName( "parsererror" ).length ) {
jQuery.error( "Invalid XML: " + data );
}
return xml;
},
noop: function() {},
// Evaluates a script in a global context
// Workarounds based on findings by Jim Driscoll
// http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
globalEval: function( data ) {
if ( data && rnotwhite.test( data ) ) {
// We use execScript on Internet Explorer
// We use an anonymous function so that context is window
// rather than jQuery in Firefox
( window.execScript || function( data ) {
window[ "eval" ].call( window, data );
} )( data );
}
},
// Convert dashed to camelCase; used by the css and data modules
// Microsoft forgot to hump their vendor prefix (#9572)
camelCase: function( string ) {
return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
},
nodeName: function( elem, name ) {
return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
},
// args is for internal usage only
each: function( object, callback, args ) {
var name, i = 0,
length = object.length,
isObj = length === undefined || jQuery.isFunction( object );
if ( args ) {
if ( isObj ) {
for ( name in object ) {
if ( callback.apply( object[ name ], args ) === false ) {
break;
}
}
} else {
for ( ; i < length; ) {
if ( callback.apply( object[ i++ ], args ) === false ) {
break;
}
}
}
// A special, fast, case for the most common use of each
} else {
if ( isObj ) {
for ( name in object ) {
if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
break;
}
}
} else {
for ( ; i < length; ) {
if ( callback.call( object[ i ], i, object[ i++ ] ) === false ) {
break;
}
}
}
}
return object;
},
// Use native String.trim function wherever possible
trim: trim ?
function( text ) {
return text == null ?
"" :
trim.call( text );
} :
// Otherwise use our own trimming functionality
function( text ) {
return text == null ?
"" :
text.toString().replace( trimLeft, "" ).replace( trimRight, "" );
},
// results is for internal usage only
makeArray: function( array, results ) {
var ret = results || [];
if ( array != null ) {
// The window, strings (and functions) also have 'length'
// Tweaked logic slightly to handle Blackberry 4.7 RegExp issues #6930
var type = jQuery.type( array );
if ( array.length == null || type === "string" || type === "function" || type === "regexp" || jQuery.isWindow( array ) ) {
push.call( ret, array );
} else {
jQuery.merge( ret, array );
}
}
return ret;
},
inArray: function( elem, array, i ) {
var len;
if ( array ) {
if ( indexOf ) {
return indexOf.call( array, elem, i );
}
len = array.length;
i = i ? i < 0 ? Math.max( 0, len + i ) : i : 0;
for ( ; i < len; i++ ) {
// Skip accessing in sparse arrays
if ( i in array && array[ i ] === elem ) {
return i;
}
}
}
return -1;
},
merge: function( first, second ) {
var i = first.length,
j = 0;
if ( typeof second.length === "number" ) {
for ( var l = second.length; j < l; j++ ) {
first[ i++ ] = second[ j ];
}
} else {
while ( second[j] !== undefined ) {
first[ i++ ] = second[ j++ ];
}
}
first.length = i;
return first;
},
grep: function( elems, callback, inv ) {
var ret = [], retVal;
inv = !!inv;
// Go through the array, only saving the items
// that pass the validator function
for ( var i = 0, length = elems.length; i < length; i++ ) {
retVal = !!callback( elems[ i ], i );
if ( inv !== retVal ) {
ret.push( elems[ i ] );
}
}
return ret;
},
// arg is for internal usage only
map: function( elems, callback, arg ) {
var value, key, ret = [],
i = 0,
length = elems.length,
// jquery objects are treated as arrays
isArray = elems instanceof jQuery || length !== undefined && typeof length === "number" && ( ( length > 0 && elems[ 0 ] && elems[ length -1 ] ) || length === 0 || jQuery.isArray( elems ) ) ;
// Go through the array, translating each of the items to their
if ( isArray ) {
for ( ; i < length; i++ ) {
value = callback( elems[ i ], i, arg );
if ( value != null ) {
ret[ ret.length ] = value;
}
}
// Go through every key on the object,
} else {
for ( key in elems ) {
value = callback( elems[ key ], key, arg );
if ( value != null ) {
ret[ ret.length ] = value;
}
}
}
// Flatten any nested arrays
return ret.concat.apply( [], ret );
},
// A global GUID counter for objects
guid: 1,
// Bind a function to a context, optionally partially applying any
// arguments.
proxy: function( fn, context ) {
if ( typeof context === "string" ) {</