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/mod/wiki/diff/ -> difflib.php (source)

[Source view]

Standard diff function plus some extras for handling XHTML diffs.

Author: s.marshall@open.ac.uk
Copyright: © 2007 The Open University
License: http://www.gnu.org/copyleft/gpl.html GNU Public License
File Size: 765 lines (24 kb)
Included or required:0 times
Referenced: 1 time
Includes or requires: 0 files

Defines 7 classes

ouwiki_line:: (2 methods):
  __construct()
  ouwiki_line()

name:: (10 methods):
  get_as_string()
  get_as_strings()
  is_empty()
  ouwiki_diff_html_to_lines()
  internal_find_deletes()
  ouwiki_diff_internal_flip()
  ouwiki_diff_words()
  ouwiki_diff()
  ouwiki_diff_add_markers()
  ouwiki_diff_html()

ouwiki_word:: (2 methods):
  __construct()
  ouwiki_word()

name:: (10 methods):
  get_as_string()
  get_as_strings()
  is_empty()
  ouwiki_diff_html_to_lines()
  internal_find_deletes()
  ouwiki_diff_internal_flip()
  ouwiki_diff_words()
  ouwiki_diff()
  ouwiki_diff_add_markers()
  ouwiki_diff_html()

ouwiki_change_range:: (0 methods):

ouwiki_changes:: (2 methods):
  __construct()
  ouwiki_changes()

name:: (10 methods):
  get_as_string()
  get_as_strings()
  is_empty()
  ouwiki_diff_html_to_lines()
  internal_find_deletes()
  ouwiki_diff_internal_flip()
  ouwiki_diff_words()
  ouwiki_diff()
  ouwiki_diff_add_markers()
  ouwiki_diff_html()

Defines 10 functions

  ouwiki_diff_internal()
  ouwiki_diff_merge()
  ouwiki_diff_sort_v()
  ouwiki_diff_find_last()

Class: ouwiki_line  - X-Ref

Class representing one 'line' of HTML content for the purpose of
text comparison.

__construct($data,$linepos)   X-Ref
Construct line object based on a chunk of text.

param: string $data Text data that makes up this 'line'. (May include line breaks etc.)
param: int $linepos Position number for first character in text

ouwiki_line($data, $linepos)   X-Ref
Old syntax of class constructor. Deprecated in PHP7.


Class: name  - X-Ref

get_as_string()   X-Ref

return: string Normalised string representation of this line object

get_as_strings($lines)   X-Ref
Static function converts lines to strings.

param: array $lines Array of ouwiki_line
return: array Array of strings

is_empty()   X-Ref

return: True if there are no words in the line

ouwiki_diff_html_to_lines($content)   X-Ref
Prepares XHTML content for text difference comparison.

param: string $content XHTML content [NO SLASHES]
return: array Array of ouwiki_line objects

internal_find_deletes($diff,$count2)   X-Ref
Find deleted lines. These are lines in file1 that
cannot be present even in modified form in file2
because we have matching lines around them.
O(n) algorithm.

param: array $diff Array of file1->file2 indexes
param: int $count2 Count of lines in file2

ouwiki_diff_internal_flip($diff,$count2)   X-Ref
Flips around the array returned by ouwiki_diff_internal
so that it refers to lines from the other file.

param: array $diff Array of index1=>index2
param: int $count2 Count of lines in file 2
return: array Flipped version

ouwiki_diff_words($lines1,$lines2)   X-Ref
Compares two files based initially on lines and then on words within the lines that
differ.

param: array $lines1 Array of ouwiki_line
param: array $lines2 Array of ouwiki_line
return: array (deleted,added); deleted and added are arrays of ouwiki_word with

ouwiki_diff($file1,$file2)   X-Ref
Runs diff and interprets results into ouwiki_changes object.

param: array $file1 Array of lines in file 1. The first line in the file
param: array $file2 Array of lines in file 2, again starting from 1.
return: ouwiki_changes Object describing changes

ouwiki_diff_add_markers($html,$words,$markerclass,$beforetext,$aftertext)   X-Ref
Adds HTML span elements to $html around the words listed in $words.

param: string $html HTML content
param: array $words Array of ouwiki_word to mark
param: string $markerclass Name of class for span element
return: HTML with markup added

ouwiki_diff_html($html1,$html2)   X-Ref
Compares two HTML files. (This is the main function that everything else supports.)

param: string $html1 XHTML for file 1
param: string $html2 XHTML for file 2
return: array ($result1,$result2) to be displayed indicating the differences

Class: ouwiki_word  - X-Ref

Represents single word for html comparison. Note that words
are just chunks of plain text and may not be actual words;
they could include punctuation or (if there was e.g. a span
in the middle of something) even be part-words.

__construct($word,$start)   X-Ref
No description

ouwiki_word($word, $start)   X-Ref
Old syntax of class constructor. Deprecated in PHP7.


Class: name  - X-Ref

get_as_string()   X-Ref

return: string Normalised string representation of this line object

get_as_strings($lines)   X-Ref
Static function converts lines to strings.

param: array $lines Array of ouwiki_line
return: array Array of strings

is_empty()   X-Ref

return: True if there are no words in the line

ouwiki_diff_html_to_lines($content)   X-Ref
Prepares XHTML content for text difference comparison.

param: string $content XHTML content [NO SLASHES]
return: array Array of ouwiki_line objects

internal_find_deletes($diff,$count2)   X-Ref
Find deleted lines. These are lines in file1 that
cannot be present even in modified form in file2
because we have matching lines around them.
O(n) algorithm.

param: array $diff Array of file1->file2 indexes
param: int $count2 Count of lines in file2

ouwiki_diff_internal_flip($diff,$count2)   X-Ref
Flips around the array returned by ouwiki_diff_internal
so that it refers to lines from the other file.

param: array $diff Array of index1=>index2
param: int $count2 Count of lines in file 2
return: array Flipped version

ouwiki_diff_words($lines1,$lines2)   X-Ref
Compares two files based initially on lines and then on words within the lines that
differ.

param: array $lines1 Array of ouwiki_line
param: array $lines2 Array of ouwiki_line
return: array (deleted,added); deleted and added are arrays of ouwiki_word with

ouwiki_diff($file1,$file2)   X-Ref
Runs diff and interprets results into ouwiki_changes object.

param: array $file1 Array of lines in file 1. The first line in the file
param: array $file2 Array of lines in file 2, again starting from 1.
return: ouwiki_changes Object describing changes

ouwiki_diff_add_markers($html,$words,$markerclass,$beforetext,$aftertext)   X-Ref
Adds HTML span elements to $html around the words listed in $words.

param: string $html HTML content
param: array $words Array of ouwiki_word to mark
param: string $markerclass Name of class for span element
return: HTML with markup added

ouwiki_diff_html($html1,$html2)   X-Ref
Compares two HTML files. (This is the main function that everything else supports.)

param: string $html1 XHTML for file 1
param: string $html2 XHTML for file 2
return: array ($result1,$result2) to be displayed indicating the differences

Class: ouwiki_change_range  - X-Ref

Represents a changed area of file and where it is located in the
two source files.

Class: ouwiki_changes  - X-Ref

A more logical representation of the results from ouwiki_internal_diff()

__construct($diff,$count2)   X-Ref

param: array $diff Array from line indices in file1
param: int $count2 Number of lines in file2

ouwiki_changes($diff, $count2)   X-Ref
Old syntax of class constructor. Deprecated in PHP7.


Class: name  - X-Ref

get_as_string()   X-Ref

return: string Normalised string representation of this line object

get_as_strings($lines)   X-Ref
Static function converts lines to strings.

param: array $lines Array of ouwiki_line
return: array Array of strings

is_empty()   X-Ref

return: True if there are no words in the line

ouwiki_diff_html_to_lines($content)   X-Ref
Prepares XHTML content for text difference comparison.

param: string $content XHTML content [NO SLASHES]
return: array Array of ouwiki_line objects

internal_find_deletes($diff,$count2)   X-Ref
Find deleted lines. These are lines in file1 that
cannot be present even in modified form in file2
because we have matching lines around them.
O(n) algorithm.

param: array $diff Array of file1->file2 indexes
param: int $count2 Count of lines in file2

ouwiki_diff_internal_flip($diff,$count2)   X-Ref
Flips around the array returned by ouwiki_diff_internal
so that it refers to lines from the other file.

param: array $diff Array of index1=>index2
param: int $count2 Count of lines in file 2
return: array Flipped version

ouwiki_diff_words($lines1,$lines2)   X-Ref
Compares two files based initially on lines and then on words within the lines that
differ.

param: array $lines1 Array of ouwiki_line
param: array $lines2 Array of ouwiki_line
return: array (deleted,added); deleted and added are arrays of ouwiki_word with

ouwiki_diff($file1,$file2)   X-Ref
Runs diff and interprets results into ouwiki_changes object.

param: array $file1 Array of lines in file 1. The first line in the file
param: array $file2 Array of lines in file 2, again starting from 1.
return: ouwiki_changes Object describing changes

ouwiki_diff_add_markers($html,$words,$markerclass,$beforetext,$aftertext)   X-Ref
Adds HTML span elements to $html around the words listed in $words.

param: string $html HTML content
param: array $words Array of ouwiki_word to mark
param: string $markerclass Name of class for span element
return: HTML with markup added

ouwiki_diff_html($html1,$html2)   X-Ref
Compares two HTML files. (This is the main function that everything else supports.)

param: string $html1 XHTML for file 1
param: string $html2 XHTML for file 2
return: array ($result1,$result2) to be displayed indicating the differences

Functions
Functions that are not part of a class:

ouwiki_diff_internal($file1,$file2)   X-Ref
Basic diff utility function, using standard diff algorithm.

Based on Bell Laboratories Computing Science Technical Report #41,
July 1976, Hunt & McIlroy, Appendix A.1 and A.3.

http://www.cs.dartmouth.edu/~doug/diff.ps

param: array $file1 Array of lines in file 1. The first line in the file
param: array $file2 Array of lines in file 2, again starting from 1.
return: array An array with one entry (again 1-based) for each line in

ouwiki_diff_merge(&$K,&$k,$i,&$E,$p,&$candidates)   X-Ref
No description

ouwiki_diff_sort_v($a,$b)   X-Ref
No description

ouwiki_diff_find_last(&$V,&$E,$hash)   X-Ref
No description