speculator: Add HTML diffing
I started fiddling with re-implementing the perl script in Go to add some new functionality (and avoid the Perl), but it's not yet usablepull/977/head
Daniel Wagner-Hall
9 years ago
parent
2a2cd808fb
commit
d9013cab5f
@ -0,0 +1,564 @@
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#!/usr/bin/perl
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#
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# htmldiff - present a diff marked version of two html documents
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#
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# Copyright (c) 1998-2006 MACS, Inc.
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#
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# Copyright (c) 2007 SiSco, Inc.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# See http://www.themacs.com for more information.
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#
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# usage: htmldiff [[-c] [-l] [-o] oldversion newversion [output]]
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#
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# -c - disable metahtml comment processing
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# -o - disable outputting of old text
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# -l - use navindex to create sequence of diffs
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# oldversion - the previous version of the document
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# newversion - the newer version of the document
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# output - a filename to place the output in. If omitted, the output goes to
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# standard output.
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#
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# if invoked with no options or arguments, operates as a CGI script. It then
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# takes the following parameters:
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#
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# oldfile - the URL of the original file
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# newfile - the URL of the new file
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# mhtml - a flag to indicate whether it should be aware of MetaHTML comments.
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#
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# requires GNU diff utility
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# also requires the perl modules Getopt::Std
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#
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# NOTE: The markup created by htmldiff may not validate against the HTML 4.0
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# DTD. This is because the algorithm is realtively simple, and there are
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# places in the markup content model where the span element is not allowed.
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# Htmldiff is NOT aware of these places.
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#
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# $Source: /u/sources/public/2009/htmldiff/htmldiff.pl,v $
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# $Revision: 1.1 $
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#
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# $Log: htmldiff.pl,v $
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# Revision 1.1 2014/01/06 08:04:51 dom
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# added copy of htmldiff perl script since aptest.com repo no longer available
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#
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# Revision 1.5 2008/03/05 13:23:16 ahby
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# Fixed a problem with leading whitespace before markup.
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#
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# Revision 1.4 2007/12/13 13:09:16 ahby
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# Updated copyright and license.
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#
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# Revision 1.3 2007/12/13 12:53:34 ahby
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# Changed use of span to ins and del
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#
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# Revision 1.2 2002/02/13 16:27:23 ahby
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# Changed processing model.
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# Improved handling of old text and changed styles.
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#
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# Revision 1.1 2000/07/12 12:20:04 ahby
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# Updated to remove empty spans - this fixes validation problems under
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# strict.
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#
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# Revision 1.11 1999/12/08 19:46:45 ahby
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# Fixed validation errors introduced by placing markup where it didn't
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# belong.
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#
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# Revision 1.10 1999/10/18 13:42:58 ahby
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# Added -o to the usage message.
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#
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# Revision 1.9 1999/05/04 12:29:11 ahby
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# Added an option to turn off the display of old text.
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#
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# Revision 1.8 1999/04/09 14:37:27 ahby
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# Fixed a perl syntax error.
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#
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# Revision 1.7 1999/04/09 14:35:49 ahby
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# Added reference to MACS homepage.
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#
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# Revision 1.6 1999/04/09 14:35:09 ahby
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# Added comment about validity of generated markup.
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#
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# Revision 1.5 1999/02/22 22:17:54 ahby
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# Changed to use stylesheets.
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# Changed to rely upon span.
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# Changed to work around content model problems.
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#
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# Revision 1.4 1999/02/08 02:32:22 ahby
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# Added a copyright statement.
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#
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# Revision 1.3 1999/02/08 02:30:40 ahby
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# Added header processing.
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#
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# Revision 1.2 1998/12/10 17:31:31 ahby
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# Fixed to escape less-thans in change blocks and to not permit change
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# markup within specific elements (like TITLE).
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#
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# Revision 1.1 1998/11/26 00:09:22 ahby
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# Initial revision
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#
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#
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use Getopt::Std;
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sub usage {
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print STDERR "htmldiff [-c] [-o] oldversion newversion [output]\n";
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exit;
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}
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sub url_encode {
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my $str = shift;
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$str =~ s/([\x00-\x1f\x7F-\xFF])/
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sprintf ('%%%02x', ord ($1))/eg;
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return $str;
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}
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# markit - diff-mark the streams
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#
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# markit(file1, file2)
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#
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# markit relies upon GNUdiff to mark up the text.
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#
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# The markup is encoded using special control sequences:
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#
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# a block wrapped in control-a is deleted text
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# a block wrapped in control-b is old text
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# a block wrapped in control-c is new text
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#
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# The main processing loop attempts to wrap the text blocks in appropriate
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# SPANs based upon the type of text that it is.
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#
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# When the loop encounters a < in the text, it stops the span. Then it outputs
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# the element that is defined, then it restarts the span.
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sub markit {
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my $retval = "";
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my($file1) = shift;
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my($file2) = shift;
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# my $old="<span class=\\\"diff-old-a\\\">deleted text: </span>%c'\012'%c'\001'%c'\012'%<%c'\012'%c'\001'%c'\012'";
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my $old="%c'\012'%c'\001'%c'\012'%<%c'\012'%c'\001'%c'\012'";
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my $new="%c'\012'%c'\003'%c'\012'%>%c'\012'%c'\003'%c'\012'";
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my $unchanged="%=";
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my $changed="%c'\012'%c'\001'%c'\012'%<%c'\012'%c'\001'%c'\012'%c'\004'%c'\012'%>%c'\012'%c'\004'%c'\012'";
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if ($opt_o) {
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$old = "";
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$changed = "%c'\012'%c'\004'%c'\012'%>%c'\012'%c'\004'%c'\012'";
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}
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# my $old="%c'\002'<font color=\\\"purple\\\" size=\\\"-2\\\">deleted text:</font><s>%c'\012'%c'\001'%c'\012'%<%c'\012'%c'\001'%c'\012'</s>%c'\012'%c'\002'";
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# my $new="%c'\002'<font color=\\\"purple\\\"><u>%c'\012'%c'\002'%>%c'\002'</u></font>%c'\002'%c'\012'";
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# my $unchanged="%=";
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# my $changed="%c'\002'<s>%c'\012'%c'\001'%c'\012'%<%c'\012'%c'\001'%c'\012'</s><font color=\\\"purple\\\"><u>%c'\002'%c'\012'%>%c'\012'%c'\002'</u></font>%c'\002'%c'\012'";
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my @span;
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$span[0]="</span>";
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$span[1]="<del class=\"diff-old\">";
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$span[2]="<del class=\"diff-old\">";
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$span[3]="<ins class=\"diff-new\">";
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$span[4]="<ins class=\"diff-chg\">";
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my @diffEnd ;
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$diffEnd[1] = '</del>';
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$diffEnd[2] = '</del>';
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$diffEnd[3] = '</ins>';
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$diffEnd[4] = '</ins>';
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my $diffcounter = 0;
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open(FILE, qq(diff -d --old-group-format="$old" --new-group-format="$new" --changed-group-format="$changed" --unchanged-group-format="$unchanged" $file1 $file2 |)) || die("Diff failed: $!");
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# system (qq(diff --old-group-format="$old" --new-group-format="$new" --changed-group-format="$changed" --unchanged-group-format="$unchanged" $file1 $file2 > /tmp/output));
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my $state = 0;
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my $inblock = 0;
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my $temp = "";
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my $lineCount = 0;
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# strategy:
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#
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# process the output of diff...
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#
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# a link with control A-D means the start/end of the corresponding ordinal
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# state (1-4). Resting state is state 0.
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#
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# While in a state, accumulate the contents for that state. When exiting the
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# state, determine if it is appropriate to emit the contents with markup or
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# not (basically, if the accumulated buffer contains only empty lines or lines
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# with markup, then we don't want to emit the wrappers. We don't need them.
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#
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# Note that if there is markup in the "old" block, that markup is silently
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# removed. It isn't really that interesting, and it messes up the output
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# something fierce.
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while (<FILE>) {
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my $anchor = $opt_l ? qq[<a tabindex="$diffcounter">] : "" ;
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my $anchorEnd = $opt_l ? q[</a>] : "" ;
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$lineCount ++;
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if ($state == 0) { # if we are resting and we find a marker,
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# then we must be entering a block
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if (m/^([\001-\004])/) {
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$state = ord($1);
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$_ = "";
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}
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# if (m/^\001/) {
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# $state = 1;
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# s/^/$span[1]/;
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# } elsif (m/^\002/) {
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# $state = 2;
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# s/^/$span[2]/;
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# } elsif (m/^\003/) {
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# $state = 3;
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# s/^/$span[3]/;
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# } elsif (m/^\004/) {
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# $state = 4;
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# s/^/$span[4]/;
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# }
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} else {
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# if we are in "old" state, remove markup
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if (($state == 1) || ($state == 2)) {
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s/\<.*\>//; # get rid of any old markup
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s/\</</g; # escape any remaining STAG or ETAGs
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s/\>/>/g;
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}
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# if we found another marker, we must be exiting the state
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if (m/^([\001-\004])/) {
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if ($temp ne "") {
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$_ = $span[$state] . $anchor . $temp . $anchorEnd . $diffEnd[$state] . "\n";
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$temp = "";
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} else {
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$_ = "" ;
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}
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$state = 0;
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} elsif (m/^\s*\</) { # otherwise, is this line markup?
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# if it is markup AND we haven't seen anything else yet,
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# then we will emit the markup
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if ($temp eq "") {
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$retval .= $_;
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$_ = "";
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} else { # we wrap it with the state switches and hold it
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s/^/$anchorEnd$diffEnd[$state]/;
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s/$/$span[$state]$anchor/;
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$temp .= $_;
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$_ = "";
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}
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} else {
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if (m/.+/) {
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$temp .= $_;
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$_ = "";
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}
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}
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}
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s/\001//g;
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s/\002//g;
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s/\003//g;
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s/\004//g;
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if ($_ !~ m/^$/) {
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$retval .= $_;
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}
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$diffcounter++;
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}
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close FILE;
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$retval =~ s/$span[1]\n+$diffEnd[1]//g;
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$retval =~ s/$span[2]\n+$diffEnd[2]//g;
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$retval =~ s/$span[3]\n+$diffEnd[3]//g;
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$retval =~ s/$span[4]\n+$diffEnd[4]//g;
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$retval =~ s/$span[1]\n*$//g;
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$retval =~ s/$span[2]\n*$//g;
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$retval =~ s/$span[3]\n*$//g;
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$retval =~ s/$span[4]\n*$//g;
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return $retval;
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}
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sub splitit {
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my $filename = shift;
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my $headertmp = shift;
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my $inheader=0;
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my $preformatted=0;
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my $inelement=0;
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my $retval = "";
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my $styles = q(<style type='text/css'>
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.diff-old-a {
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font-size: smaller;
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color: red;
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}
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.diff-new { background-color: yellow; }
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.diff-chg { background-color: lime; }
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.diff-new:before,
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.diff-new:after
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{ content: "\2191" }
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.diff-chg:before, .diff-chg:after
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{ content: "\2195" }
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.diff-old { text-decoration: line-through; background-color: #FBB; }
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.diff-old:before,
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.diff-old:after
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{ content: "\2193" }
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:focus { border: thin red solid}
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</style>
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);
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if ($opt_t) {
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$styles .= q(
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<script type="text/javascript">
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<!--
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function setOldDisplay() {
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for ( var s = 0; s < document.styleSheets.length; s++ ) {
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var css = document.styleSheets[s];
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var mydata ;
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try { mydata = css.cssRules ;
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if ( ! mydata ) mydata = css.rules;
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for ( var r = 0; r < mydata.length; r++ ) {
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if ( mydata[r].selectorText == '.diff-old' ) {
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mydata[r].style.display = ( mydata[r].style.display == '' ) ? 'none'
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: '';
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return;
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}
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}
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} catch(e) {} ;
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}
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}
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-->
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</script>
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);
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}
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if ($stripheader) {
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open(HEADER, ">$headertmp");
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}
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my $incomment = 0;
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my $inhead = 1;
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open(FILE, $filename) || die("File $filename cannot be opened: $!");
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while (<FILE>) {
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if ($inhead == 1) {
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if (m/\<\/head/i) {
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print HEADER $styles;
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}
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if (m/\<body/i) {
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$inhead = 0;
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print HEADER;
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if ($opt_t) {
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print HEADER q(
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<form action=""><input type="button" onclick="setOldDisplay()" value="Show/Hide Old Content" /></form>
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);
|
||||||
|
}
|
||||||
|
close HEADER;
|
||||||
|
} else {
|
||||||
|
print HEADER;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if ($incomment) {
|
||||||
|
if (m;-->;) {
|
||||||
|
$incomment = 0;
|
||||||
|
s/.*-->//;
|
||||||
|
} else {
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (m;<!--;) {
|
||||||
|
while (m;<!--.*-->;) {
|
||||||
|
s/<!--.*?-->//;
|
||||||
|
}
|
||||||
|
if (m;<!--; ) {
|
||||||
|
$incomment = 1;
|
||||||
|
s/<!--.*//;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (m/\<pre/i) {
|
||||||
|
$preformatted = 1;
|
||||||
|
}
|
||||||
|
if (m/\<\/pre\>/i) {
|
||||||
|
$preformatted = 0;
|
||||||
|
}
|
||||||
|
if ($preformatted) {
|
||||||
|
$retval .= $_;
|
||||||
|
} elsif ($mhtmlcomments && /^;;;/) {
|
||||||
|
$retval .= $_;
|
||||||
|
} else {
|
||||||
|
my @list = split(' ');
|
||||||
|
foreach $element (@list) {
|
||||||
|
if ($element =~ m/\<H[1-6]/i) {
|
||||||
|
# $inheader = 1;
|
||||||
|
}
|
||||||
|
if ($inheader == 0) {
|
||||||
|
$element =~ s/</\n</g;
|
||||||
|
$element =~ s/^\n//;
|
||||||
|
$element =~ s/>/>\n/g;
|
||||||
|
$element =~ s/\n$//;
|
||||||
|
$element =~ s/>\n([.,:!]+)/>$1/g;
|
||||||
|
}
|
||||||
|
if ($element =~ m/\<\/H[1-6]\>/i) {
|
||||||
|
$inheader = 0;
|
||||||
|
}
|
||||||
|
$retval .= "$element";
|
||||||
|
$inelement += ($element =~ s/</</g);
|
||||||
|
$inelement -= ($element =~ s/>/>/g);
|
||||||
|
if ($inelement < 0) {
|
||||||
|
$inelement = 0;
|
||||||
|
}
|
||||||
|
if (($inelement == 0) && ($inheader == 0)) {
|
||||||
|
$retval .= "\n";
|
||||||
|
} else {
|
||||||
|
$retval .= " ";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
undef @list;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
$retval .= "\n";
|
||||||
|
close FILE;
|
||||||
|
return $retval;
|
||||||
|
}
|
||||||
|
|
||||||
|
$mhtmlcomments = 1;
|
||||||
|
|
||||||
|
sub cli {
|
||||||
|
getopts("clto") || usage();
|
||||||
|
|
||||||
|
if ($opt_c) {$mhtmlcomments = 0;}
|
||||||
|
|
||||||
|
if (@ARGV < 2) { usage(); }
|
||||||
|
|
||||||
|
$file1 = $ARGV[0];
|
||||||
|
$file2 = $ARGV[1];
|
||||||
|
$file3 = $ARGV[2];
|
||||||
|
|
||||||
|
$tmp = splitit($file1, $headertmp1);
|
||||||
|
open (FILE, ">$tmp1");
|
||||||
|
print FILE $tmp;
|
||||||
|
close FILE;
|
||||||
|
|
||||||
|
$tmp = splitit($file2, $headertmp2);
|
||||||
|
open (FILE, ">$tmp2");
|
||||||
|
print FILE $tmp;
|
||||||
|
close FILE;
|
||||||
|
|
||||||
|
$output = "";
|
||||||
|
|
||||||
|
if ($stripheader) {
|
||||||
|
open(FILE, $headertmp2);
|
||||||
|
while (<FILE>) {
|
||||||
|
$output .= $_;
|
||||||
|
}
|
||||||
|
close(FILE);
|
||||||
|
}
|
||||||
|
|
||||||
|
$output .= markit($tmp1, $tmp2);
|
||||||
|
|
||||||
|
if ($file3) {
|
||||||
|
open(FILE, ">$file3");
|
||||||
|
print FILE $output;
|
||||||
|
close FILE;
|
||||||
|
} else {
|
||||||
|
print $output;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
sub cgi {
|
||||||
|
# use LWP::UserAgent;
|
||||||
|
# use CGI;
|
||||||
|
|
||||||
|
my $query = new CGI;
|
||||||
|
my $url1 = $query->param("oldfile");
|
||||||
|
my $url2 = $query->param("newfile");
|
||||||
|
my $mhtml = $query->param("mhtml");
|
||||||
|
|
||||||
|
my $file1 = "/tmp/htdcgi1.$$";
|
||||||
|
my $file2 = "/tmp/htdcgi2.$$";
|
||||||
|
|
||||||
|
my $ua = new LWP::UserAgent;
|
||||||
|
$ua->agent("MACS, Inc. HTMLdiff/0.9 " . $ua->agent);
|
||||||
|
|
||||||
|
# Create a request
|
||||||
|
|
||||||
|
my $req1 = new HTTP::Request GET => $url1;
|
||||||
|
|
||||||
|
my $res1 = $ua->request($req1, $file1);
|
||||||
|
if ($res1->is_error) {
|
||||||
|
print $res1->error_as_HTML();
|
||||||
|
print "<p>The URL $url1 could not be found. Please check it and try again.</p>";
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
my $req2 = new HTTP::Request GET => $url2;
|
||||||
|
|
||||||
|
my $res2 = $ua->request($req2, $file2);
|
||||||
|
if ($res2->is_error) {
|
||||||
|
print $res2->error_as_HTML();
|
||||||
|
print "<p>The URL $url2 could not be found. Please check it and try again.</p>";
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
$split1 = splitit($file1, $headertmp1);
|
||||||
|
open (FILE, ">$tmp1");
|
||||||
|
print FILE $split1;
|
||||||
|
close FILE;
|
||||||
|
|
||||||
|
$split2 = splitit($file2, $headertmp2);
|
||||||
|
open (FILE, ">$tmp2");
|
||||||
|
print FILE $split2;
|
||||||
|
close FILE;
|
||||||
|
|
||||||
|
$output = "";
|
||||||
|
|
||||||
|
if ($stripheader) {
|
||||||
|
open(FILE, $headertmp2);
|
||||||
|
while (<FILE>) {
|
||||||
|
$output .= $_;
|
||||||
|
}
|
||||||
|
close(FILE);
|
||||||
|
}
|
||||||
|
|
||||||
|
$output .= markit($tmp1, $tmp2);
|
||||||
|
|
||||||
|
my $base=$res2->base;
|
||||||
|
|
||||||
|
if ($base !~ /\/$/) {
|
||||||
|
$base =~ s/[^\/]*$//;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ( $output !~ /<base/i ) {
|
||||||
|
$output =~ s/<head>/<head>\n<base href="$base">/i ||
|
||||||
|
$output =~ s/<html>/<html>\n<base href="$base">/i ;
|
||||||
|
}
|
||||||
|
|
||||||
|
print $query->header(-type=>'text/html',-nph=>1);
|
||||||
|
print $output;
|
||||||
|
|
||||||
|
unlink $file1;
|
||||||
|
unlink $file2;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
$tmp1="/tmp/htdtmp1.$$";
|
||||||
|
$headertmp1="/tmp/htdhtmp1.$$";
|
||||||
|
$tmp2="/tmp/htdtmp2.$$";
|
||||||
|
$headertmp2="/tmp/htdhtmp2.$$";
|
||||||
|
$stripheader = 1;
|
||||||
|
|
||||||
|
if (@ARGV == 0) {
|
||||||
|
cgi(); # if no arguments, we must be operating as a cgi script
|
||||||
|
} else {
|
||||||
|
cli(); # if there are arguments, then we are operating as a CLI
|
||||||
|
}
|
||||||
|
|
||||||
|
unlink $tmp1;
|
||||||
|
unlink $headertmp1;
|
||||||
|
unlink $tmp2;
|
||||||
|
unlink $headertmp2;
|
||||||
Loading…
Reference in New Issue