|
|
- #!/usr/bin/perl
-
- =pod
-
- =head1 NAME
-
- display - script to display fragments of text on the web and elsewhere
-
- =head1 DESCRIPTION
-
- display started life as a way to concatenate fragments of handwritten HTML by
- date. While the script has since haphazardly accumulated several of the usual
- weblog features (comments, lightweight markup, feed generation, embedded Perl,
- poetry tools, stupid dependencies), it hasn't changed much in six years. The
- current version is intended to support FastCGI via CGI::Fast, if available, and
- otherwise operate as a traditional CGI or commandline utility. It may have some
- distance to go towards this goal.
-
- Entries are stored in a simple directory tree under C<$DISPLAY_CONF{ROOT_DIR}>.
-
- Like:
-
- archives/2001/1/1
- archives/2001/1/1/sub_entry
-
- An entry may be either a plain text file, or a directory containing several
- such files + whatever else you'd like to store. If it's a directory, the file
- called "index" will be treated as the text of the entry, and all other lower
- case filenames without extensions will be treated as sub-entries or documents
- within that entry, and displayed accordingly.
-
- Directories may be nested to an arbitrary depth, though I don't promise that
- this won't break on you.
-
- A PNG or JPEG file with a name like
-
- 2001/1/1.icon.png
- 2001/1/1/index.icon.png
- 2001/1/1/whatever.icon.png
-
- will be treated as an icon for the appropriate entry file.
-
- =head2 MARKUP
-
- Entries may consist of hand-written HTML (to be passed along without further
- interpretation), a supported form of lightweight markup, or some combination
- thereof. Actually, an entry may consist of any darn thing you please, as long
- as Perl will agree that it is text, but presumably you're going to be feeding
- this to a browser.
-
- Special markup is indicated by a variety of XML-style container tags.
-
- B<Embedded Perl> - evaluated and replaced by whatever value you return
- (evaluated in a scalar context):
-
- <perl>my $dog = "Ralph."; return $dog;</perl>
-
- This code is evaluated before any other processing is done, so you can return
- any other markup understood by the script and have it handled appropriately.
-
- B<Interpolated variables> - actually keys to %TEMPLATE, for the moment:
-
- <perl>$TEMPLATE{dog} = "Ralph"; return '';</perl>
- <p>My dog is named ${dog}.</p>
-
- Embedded code and variables are mostly intended for use in F<header> and
- F<footer> files, where it's handy to drop in titles or conditionalize aspects
- of a layout. You want to be careful with this sort of thing - it's useful in
- small doses, but it's also a maintainability nightmare waiting to happen.
- (WordPress, I am looking at you.)
-
- B<Several forms of lightweight markup>:
-
- <wala>Wala::Markup, via Wala.pm - very basic wiki syntax</wala>
-
- <textile>Dean Allen's Textile, via Brad Choate's
- Text::Textile.</textile>
-
- <freeverse>An easy way to
- get properly broken lines
- -- en and em dashes ---
- for poetry and such.</freeverse>
-
- B<And a couple of shortcuts>:
-
- <image>filename.ext
- alt text, if any</image>
-
- <list>
- one list item
-
- another list item
- </list>
-
- As it stands, freeverse, image, and list are not particularly robust.
-
- =cut
-
- use strict;
- use warnings;
- no warnings 'uninitialized';
-
- use lib 'lib';
- use lib 'wala';
-
- use CGI::Fast;
- use Image::Size;
- use Text::Textile;
- use XML::Atom::SimpleFeed;
- use Wala qw (%WalaConf %DISPLAY_CONF);
-
- # default options:
- %DISPLAY_CONF = (
- ROOT_DIR => 'archives', # root dir for archived files
- URL_ROOT => 'http://p1k3.com/', # root URL for building links
- IMAGE_URL_ROOT => 'http://p1k3.com/', # same for images
- HEADER => 'header',
- FOOTER => 'footer',
- );
-
- # Grab configuration:
- if (-e 'conf.pl') {
- do 'conf.pl';
- }
-
- $WalaConf{'ShowSearchlinks'} = 0;
-
- # Handle input from FastCGI:
- while (my $query = new CGI::Fast) {
- handle($query);
- }
-
- # Fini.
-
- =head1 SUBROUTINES
-
- For no bigger than this thing is, it gets a little convoluted.
-
- =over
-
- =item handle()
-
- Handle queries.
-
- =cut
-
- sub handle {
- my ($query) = @_;
-
- # Get the time, format the couple of variables I'll actually use.
- my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday,
- $isdst) = localtime(time);
- $mon++;
- $year += 1900;
-
- # grab the command line options, using "new" if none are provided
- #my @options = @ARGV;
- #unless ($options[0]) { $options[0] = $ENV{'QUERY_STRING'} };
- my @options = $query->param('keywords');
- unless ($options[0]) { $options[0] = 'new' };
-
- # now that we have some metadata,
- # set some variables to be used in fragment interpretation.
- # (these get inserted down in line_parse(); this is less than ideal)
- $DISPLAY_CONF{title} = join(' ', @options);
-
- # Unless this is already in an HTML document, spit out some default HTML.
- my $print_footer = 0;
- unless ($options[0] eq 'feed') {
- print fragment_slurp($DISPLAY_CONF{HEADER});
- $print_footer = 1;
- }
-
- # take care of "all" alias in options
- # get everything in the archive root directory
- my @old_options = @options;
- for (@old_options) {
- if ($_ eq 'all') {
- push (@options, dir_list ($DISPLAY_CONF{ROOT_DIR},
- "high_to_low",
- "^[0-9]{1,4}\$") );
- }
- }
-
- # do appropriate things:
-
- foreach my $option (@options) {
-
- # take care of trailing slashes
- chop ($option) if (substr($option, -1, 1) eq '/');
-
- # This just provides an alias for the most recent month.
- if ($option =~ m/^(feed|new)/) {
- my $special = $1;
-
- if (-e "$DISPLAY_CONF{ROOT_DIR}/$year/$mon") {
- $option = "$year/$mon";
- } else {
- $option = recent_month();
- }
-
- # Handle feed generation using XML::Atom::SimpleFeed.
- if ($special eq 'feed') {
- feed_print($option);
- exit;
- }
- }
-
- if ( $option =~ m'^[0-9/]{5,11}[a-z_/]+$' ) {
- # nnnn/[nn/nn/]doc_name
- # It's a document within a date. entry_print it.
- print entry_markup(entry_print($option, 'index') . datestamp($option));
- }
-
- elsif ( $option =~ m'^[0-9]{4}/[0-9]{1,2}/[0-9]{1,2}$' ) {
- # nnnn/nn/nn
- # It's a specific date. Print it in full.
- print entry_markup(entry_print($option, 'all') . datestamp($option));
- }
-
- elsif ( $option =~ m'^[0-9]{4}/[0-9]{1,2}$' ) {
- # nnnn/nn - It's a month. Print it.
- month_print($option);
- }
-
- elsif ( $option =~ m'^[0-9]{4}$' ) {
- # nnnn - It's a year. Display a list of entries.
- year_print($option);
- }
-
- elsif ($option =~ m'^[a-z_]') {
- # assume it's a document in the root directory
- print entry_markup(entry_print($option, 'all'));
- }
- }
-
- # Finish up...
- # Print a footer.
- if ($print_footer) {
- print fragment_slurp($DISPLAY_CONF{FOOTER});
- }
-
- }
-
-
- sub recent_month {
-
- my (@year_files) = dir_list ("$DISPLAY_CONF{ROOT_DIR}",
- 'high_to_low',
- '^[0-9]{1,4}$');
-
- my (@month_files) = dir_list ("$DISPLAY_CONF{ROOT_DIR}/$year_files[0]",
- 'high_to_low',
- '^[0-9]{1,2}');
-
- return "$year_files[0]/$month_files[0]";
-
- }
-
- =item dir_list()
-
- Return a $sort_order sorted list of files matching $pattern in a
- directory. Called by year_print(), month_print(), and entry_print().
-
- calls $sort_order, which can be one of
-
- alpha - alphabetical
- reverse_alpha - alphabetical, reversed (might not work yet)
- high_to_low - numeric, high to low
- low_to_high - numeric, low to high
-
- =cut
-
- sub dir_list {
- my ($dir, $sort_order, $file_pattern) = @_;
- my (@files);
-
- $file_pattern = "^[0-9]{1,2}\$" unless ($file_pattern);
- $sort_order = "high_to_low" unless ($sort_order);
-
- opendir LIST_DIR, $dir;
- @files = grep /$file_pattern/, readdir LIST_DIR;
- closedir LIST_DIR;
-
- @files = sort $sort_order @files;
-
- return @files;
- }
-
- # various named sorts for dir_list
- sub alpha { $a cmp $b; } # alphabetical
- sub high_to_low { $b <=> $a; } # numeric, high to low
- sub low_to_high { $a <=> $b; } # numberic, low to high
- sub reverse_alpha { $b cmp $a; } # alphabetical, reversed
-
-
- =item year_print()
-
- List out the updates for a year. Calls dir_list(), entry_print().
-
- =cut
-
- sub year_print {
- my ($year) = @_;
- my (@update_files, $update_count, $ico_markup);
-
- if (-d "$DISPLAY_CONF{ROOT_DIR}/$year") {
- print '<div class="entry">' . "\n";
-
- if (-T "$DISPLAY_CONF{ROOT_DIR}/$year/index") {
- print entry_print($year, 'index');
- }
-
- if ( $ico_markup = icon_markup($year, $year) ) {
- print "<h3>$ico_markup $year</h3>";
- } else {
- print "<h3>$year</h3>\n";
- }
-
- my @month_files = dir_list ("$DISPLAY_CONF{ROOT_DIR}/$year",
- "high_to_low",
- "^[0-9]{1,2}\$");
-
- print "\n<table>\n";
- $update_count = 0;
- foreach my $month_file (@month_files) {
- @update_files = dir_list ("$DISPLAY_CONF{ROOT_DIR}/$year/$month_file",
- "low_to_high", "^[0-9]{1,2}\$");
-
- # Add the count of files to $update_count.
- $update_count += @update_files;
-
- print '<tr> <td class="datelink">'
- . a("$DISPLAY_CONF{URL_ROOT}$year/$month_file", month_name($month_file))
- . "</td> <td class=\"datelink\">\n";
-
- print "( <small>";
-
- foreach my $update_file (@update_files) {
- print a("$DISPLAY_CONF{URL_ROOT}$year/$month_file/$update_file", $update_file)
- . "\n";
- }
- print "</small> )</td> </tr>\n\n";
- }
- print "</table>\n";
-
- print "<p>$update_count ";
- if ($update_count > 1) {
- my ($monthly_average) = int($update_count / @month_files);
- print " entries, an arithmetic mean of $monthly_average a month.";
- } elsif ($update_count == 0) {
- print " entries";
- } elsif ($update_count == 1) {
- print " entry";
- }
- print '</p>';
-
- } elsif (-T "$DISPLAY_CONF{ROOT_DIR}/$year") {
- print entry_print($year, 'index');
- } else {
- print '<p>No such year.</p>';
- }
- print "</div>\n";
-
- return ($update_count);
- }
-
- =item month_print()
-
- Prints the entries in a given month (nnnn/nn). Calls dir_list(), datestamp().
-
- =cut
-
- sub month_print {
- my ($year_digits, $month_digits, $calendar);
- # If a directory exists for $month, use dir_list to grab
- # the entry files it contains into @entry_files, sorted
- # numerically. Then send each entry to entry_print.
- my ($month) = @_;
-
- if (-d "$DISPLAY_CONF{ROOT_DIR}/$month") {
- if (-T "$DISPLAY_CONF{ROOT_DIR}/$month/index") {
- print entry_print($month, "index");
- }
-
- my (@entry_files) = dir_list ("$DISPLAY_CONF{ROOT_DIR}/$month",
- "high_to_low",
- "^[0-9]{1,2}\$");
-
- foreach my $entry_file (@entry_files) {
- print entry_markup( entry_print("$month/$entry_file", 'index')
- . datestamp("$month/$entry_file") );
- }
- } elsif (-T "$DISPLAY_CONF{ROOT_DIR}/$month") {
- print entry_print($month, 'index');
- }
- }
-
- =item entry_print()
-
- Prints the contents of a given entry. Calls datestamp, fragment_print,
- dir_list, and icon_markup. Recursively calls itself.
-
- =cut
-
- sub entry_print {
- my ($entry, $level) = @_;
-
- my ($result);
-
- my $entry_loc = "$DISPLAY_CONF{ROOT_DIR}/$entry"; # location of entry on local filesystem
- my $entry_url = $DISPLAY_CONF{URL_ROOT} . $entry; # and its URL
-
- # display an icon, if we have one.
- if ( my $ico_markup = icon_markup ($entry, "") ) {
- $result .= "<h2>$ico_markup</h2>\n\n";
- }
-
- if (-T $entry_loc) {
- # is text, slurp it and return
- return ($result . fragment_slurp($entry_loc));
- } elsif (-d $entry_loc) {
-
- # print index as head
- $result .= fragment_slurp ("$entry_loc/index");
-
- my @sub_entries = dir_list ($entry_loc, 'alpha',
- '^[a-z_]+(\.tgz|\.zip|\.tar\.gz)?$');
-
- # followed by any sub-entries
- if ( ($level eq 'index') and (@sub_entries > 1) ) {
- # if we're just supposed to print an index
- # spit out icons or text links for extra files
- my $contents;
- my %ignore_entries = ("index" => 1, "standing_bear" => 1);
-
- foreach my $sub_entry (@sub_entries) {
- next if ($ignore_entries{$sub_entry});
-
- if ( my $sub_ico_markup = icon_markup("$entry/$sub_entry",
- $sub_entry) ) {
- $contents .= qq|<a href="$DISPLAY_CONF{URL_ROOT}$entry/$sub_entry" |
- . qq|title="$sub_entry">$sub_ico_markup</a>\n |;
- } else {
- $contents .= qq|<a href="$DISPLAY_CONF{URL_ROOT}$entry/$sub_entry "|
- . qq|title="$sub_entry">$sub_entry</a> \n|;
- }
- }
-
- $result .= "<p><em><strong>more</strong></em>: $contents</p>\n";
- } elsif ( ($level eq 'all') and (@sub_entries > 1) ) {
-
- # but if we're supposed to print everything in the directory
- # and if there's more there than just the index file,
-
- foreach my $sub_entry (@sub_entries) {
- next if ($sub_entry eq 'index'); # skip index
-
- # print each of the other files, separated by little headers
- $result .= "\n\n<p class=\"centerpiece\">{"
- . a("$DISPLAY_CONF{URL_ROOT}$entry/$sub_entry", $sub_entry)
- . "}</p>\n\n";
-
- # skipping any archives
- next if ($sub_entry =~ m/(\.tgz|\.zip|\.tar\.gz)$/);
-
- $result .= entry_print("$entry/$sub_entry", 'index');
- }
-
- }
-
- }
-
- return $result;
- }
-
- =item icon_markup()
-
- Check if an icon exists for a given entry if so, return markup to include it.
- Icons are PNG or JPEG image files following a specific naming convention:
-
- index.icon.[png|jp(e)g] for directories
- [filename].icon.[png|jp(e)g] for flat text files
-
- Called by entry_print, calls image_size, uses filename to determine type.
-
- =cut
-
- sub icon_markup {
- my ($entry, $alt) = @_;
- my ($entry_loc) = "$DISPLAY_CONF{ROOT_DIR}/$entry";
- my ($entry_url) = "$DISPLAY_CONF{IMAGE_URL_ROOT}${entry}";
-
- my ($icon_loc, $icon_url);
-
- if (-T $entry_loc) {
- $icon_loc = "$entry_loc.icon";
- $icon_url = "$entry_url.icon";
- } elsif (-d $entry_loc) {
- $icon_loc = "$entry_loc/index.icon";
- $icon_url = "$entry_url/index.icon";
- }
-
- # put a list of icon image types to check for here
- # (first one found will be used)
- my (@suffixes) = qw(png jpg jpeg);
- my $suffix = "";
- for (@suffixes) {
- if (-e "$icon_loc.$_") {
- $suffix = $_;
- last;
- }
- }
-
- # fail unless there's a file with one of the above suffixes
- return 0 unless $suffix;
-
- # call image_size to slurp width & height from the image file
- my ($width, $height) = image_size("$icon_loc.$suffix");
-
- return qq|<img src="$icon_url.$suffix"\n width="$width" |
- . qq|height="$height"\n alt="$alt" />|;
- }
-
- =item datestamp()
-
- Returns a nice html datestamp for a given entry, including a wikilink for
- discussion and suchlike. Called by entry_print.
-
- =cut
-
- sub datestamp {
- my ($entry, $markup_start, $markup_end) = @_;
-
- unless ($markup_start and $markup_end) {
- $markup_start = "\n<p class=\"datelink\">";
- $markup_end = "</p>\n\n";
- }
-
- my ($stamp);
- if ( $entry =~ m/(^[0-9]{4}\/[0-9]{1,2}\/[0-9]{1,2})/ ) {
-
- my ($entry_year, $entry_month, $entry_day) = split (/\//, $1);
-
- # this stuff conditionalizes the wikilink
- # so that if nothing exists, you wind up with an edit form
- my ($wiki_date_name) = month_name($entry_month) . "_${entry_day}_${entry_year}";
- my $wikistamp;
- if (-e "$WalaConf{PagesDir}/${wiki_date_name}") {
- $wikistamp = qq{:: <a title="a page you can edit"}
- . qq{ href="$WalaConf{ScriptName}?$wiki_date_name">read the margins</a>};
- } else {
- $wikistamp = qq{:: <a title="a page you can edit"}
- . qq{ href="$WalaConf{ScriptName}?$wiki_date_name">write in the margins</a>};
- }
-
- # return a fancy datestamp.
-
- my $month_name = month_name($entry_month);
- $stamp = <<STAMP;
- $markup_start
- <a href="$DISPLAY_CONF{URL_ROOT}$entry_year" title="$entry_year">$entry_year</a>
- <a href="$DISPLAY_CONF{URL_ROOT}$entry_year/$entry_month" title="$entry_year/$entry_month">$month_name</a>
- <a href="$DISPLAY_CONF{URL_ROOT}$entry_year/$entry_month/$entry_day" title="$entry_year/$entry_month/$entry_day">$entry_day</a>
- $wikistamp
- $markup_end
- STAMP
-
- } else {
- $stamp = "$markup_start(failed to construct datestamp for $entry)$markup_end";
- }
-
- return ($stamp);
- }
-
- =item fragment_print()
-
- Print a text fragment - a header, footer, update, etc.
- Called by main routines, used to print headers and footers.
- Calls fragment_slurp to get the fragment it's supposed to print.
- Returns 1 on successful completion, 0 otherwise.
-
- =cut
-
- sub fragment_print {
- my ($file) = @_;
-
- my $lines = fragment_slurp($file);
-
- if (length($lines)) {
- print $lines;
- } else {
- return '';
- }
- }
-
- =item fragment_slurp()
-
- Read a text fragment, call line_parse to take care of funky markup and
- interpreting embedded code, and then return it as a string. Takes one
- parameter, the name of the file, and returns '' if it's not an extant text
- file. Called by entry_print, at least
-
- =cut
-
- sub fragment_slurp {
- my ($file) = @_;
-
- # if $file is text
- if (-T $file) {
- my $everything;
-
- open (my $fh, '<', $file) or return '';
- {
- # line sep
- local $/ = undef;
- $everything = <$fh>;
- }
- close $fh;
-
- # take care of any special markup
- # we feed $file to line_parse so it has some context to work with
- $everything = line_parse ($file, $everything);
-
- return $everything;
- } else {
- return '';
- }
- }
-
- =item line_parse()
-
- Performs substitutions on lines called by fragment_slurp, at least. Calls
- image_markup, Text::Textile, Wala::wiki_page_to_html, eval_perl. Returns
- string.
-
- Parses some special markup, specifically:
-
- <perl>embedded perl</perl>
- ${variable} interpolation from %DISPLAY_CONF
- <textile></textile> - Text::Textile to HTML
- <wala></wala> - Wala::wikify();
- <image>filename.ext</image>
- <freeverse></freeverse>
- <retcon></retcon>
- <list></list>
-
- =cut
-
- sub line_parse {
- my ($file, $everything) = (@_);
-
- # eval embedded Perl
- $everything = eval_perl($everything, $file);
-
- # interpolate variables
- $everything =~ s/\${([a-zA-Z_]+)}/$DISPLAY_CONF{$1}/ge;
-
- # take care of wala markup
- $everything =~ s/<wala>(.*?)<\/wala>/Wala::wikify($1)/seg;
-
- # take care of textile markup, if we've got any
- # this is wrapped in a conditional to keep from
- # creating the object if we don't need it.
- if ($everything =~ m/<textile>/s) {
- # head_offset: use h1., h2. in Textile formatting.
- my $textile = Text::Textile->new( head_offset => 2 );
-
- $everything =~ s/<textile>(.*?)<\/textile>/$textile->process($1)/seg;
- }
-
- # evaluate <image> tags.
- $everything =~ s!<image>(.*?)</image>!image_markup($file, $1)!seg;
-
- my %tags = ( retcon => 'div class="retcon"',
- freeverse => 'p',
- list => "ul>\n<li" );
-
- my %end_tags = ( retcon => 'div',
- freeverse => 'p',
- list => 'li></ul' );
-
- my %blank_lines = ( freeverse => "</p>\n\n<p>",
- list => "</li>\n\n<li>" );
-
- my %newlines = ( freeverse => "<br />\n" );
-
- my %dashes = ( freeverse => ' — ' );
-
- foreach my $key (keys %tags) {
- # Set some replacements, unless they've been explicitly set already.
- $end_tags{$key} = $tags{$key} unless $end_tags{$key};
- $blank_lines{$key} = "\n\n" unless $blank_lines{$key};
- $newlines{$key} = "\n" unless $newlines{$key};
- $dashes{$key} = " -- " unless $dashes{$key};
-
- while ($everything =~ m/(<$key>.*?<\/$key>)/s) {
- my $block = $1;
-
- # save the bits between instances of the block --
- # the \Q and \E escape any regex chars in the block
- my (@interstice_array) = split (/\Q$block\E/s, $everything);
-
- # now, transform the contents of the block we've found:
-
- # tags that surround the block
- $block =~ s/\n?<$key>\n?/<$tags{$key}>/gs;
- $block =~ s!\n?</$key>\n?!</$end_tags{$key}>!gs;
-
- # dashes
- $block =~ s/(\s+)\-{2}(\s+)/$1$dashes{$key}$2/gs;
-
- # blank lines within the block
- $block =~ s/\n\n/$blank_lines{$key}/gs;
-
- # single newlines (i.e., line ends) within the block
- # except those preceded by a double-quote, which probably
- # indicates a still-open tag.
- $block =~ s/([^"\n])\n([^\n])/$1$newlines{$key}$2/gs;
-
- # and slap it all back together as $everything
- $everything = join $block, @interstice_array;
-
- }
- }
-
- return $everything;
- }
-
- =item eval_perl()
-
- Evaluate embedded Perl, replacing blocks enclosed with <perl> tags
- with whatever they return (well, evaluated in a scalar context).
-
- =cut
-
- sub eval_perl {
- my ($everything, $file) = @_;
-
- while ($everything =~ m/<perl>(.*?)<\/perl>/s) {
- my $block = $1;
-
- my $output = eval $block;
- if ($@) {
- # got an error
- $everything =~ s/<perl>\Q$block\E<\/perl>/$@ in $file/s;
- } else {
- # include anything returned from $block
- $everything =~ s/<perl>\Q$block\E<\/perl>/$output/s;
- }
- }
-
- return $everything;
- }
-
-
- =item image markup()
-
- Parse out an image tag and return the appropriate html. Calls image_size.
- Called by line_parse.
-
- =cut
-
- sub image_markup {
- my ($file, $block) = @_;
-
- # get a directory for the file we're working with
- $file =~ s'[^/]* # everything not a /
- $ # up to end of string
- ''x;
-
- # truncated file date that just includes date + sub docs
- my ($file_date) = $file =~ m'([0-9]{4}/[0-9]{1,2}/[0-9]{1,2}/([a-z]*/)*)$';
-
- my ($image_name, $alt_text) = split/\n/, $block;
-
- my $image_file;
- if (-e "$file/$image_name" ) {
- $image_file = "$file/$image_name";
- $image_name = "${file_date}${image_name}";
- } elsif (-e "$DISPLAY_CONF{ROOT_DIR}/$image_name") {
- $image_file = "$DISPLAY_CONF{ROOT_DIR}/$image_name";
- }
-
- # get width & height in pixels for known filetypes
- my ($width, $height) = image_size($image_file);
-
- # may need to change this if rewrites don't work
- return qq|<img src="$DISPLAY_CONF{IMAGE_URL_ROOT}$image_name"\n height="$height"|
- . qq|\n width="$width"\n alt="$alt_text" />|;
- }
-
-
- =item month_name()
-
- Turn numeric dates into English.
-
- =cut
-
- sub month_name {
- my ($number) = @_;
-
- # "Null" is here so that $month_name[1] corresponds to January, etc.
- my @months = qw(Null January February March April May June
- July August September October November December);
-
- return $months[$number];
- }
-
-
- =item feed_print()
-
- Dump out an Atom feed of entries for a month.
-
- Called from handle(), calls entry_print, requires XML::Atom::SimpleFeed.
-
- =cut
-
- sub feed_print {
- my $month = shift;
-
- # create a feed object
- my $feed = XML::Atom::SimpleFeed->new(
- title => $DISPLAY_CONF{title},
- link => $DISPLAY_CONF{URL_ROOT},
- link => { rel => 'self', href => $DISPLAY_CONF{feed_url}, },
- icon => $DISPLAY_CONF{favicon_url},
- author => $DISPLAY_CONF{author},
- id => $DISPLAY_CONF{URL_ROOT},
- );
-
- # If a directory exists for $month, use dir_list to grab
- # the entry files it contains into @entry_files, sorted
- # numerically. Then send each entry to entry_print.
-
- my @entry_files;
-
- if (-d "$DISPLAY_CONF{ROOT_DIR}/$month") {
- (@entry_files) = dir_list ("$DISPLAY_CONF{ROOT_DIR}/$month", 'high_to_low',
- "^[0-9]{1,2}\$");
- } else {
- return 0;
- }
-
- foreach my $entry_file (@entry_files) {
- # Going to feed this to SimpleFeed.
- my $content = entry_print("$month/$entry_file", 'index');
-
- $feed->add_entry(
- title => "$month/$entry_file",
- link => $DISPLAY_CONF{URL_ROOT} . "$month/$entry_file",
- id => $DISPLAY_CONF{URL_ROOT} . "$month/$entry_file",
- content => $content,
- );
-
- }
-
- print "Content-type: application/atom+xml\n\n";
- $feed->print;
- return 1;
-
- }
-
-
- =item entry_markup()
-
- Return text wrapped in the appropriate markup for an entry. Just a wrapper
- around div() at the moment.
-
- =cut
-
- sub entry_markup {
- my ($text) = @_;
- return div($text, 'entry');
- }
-
-
- =item div()
-
- Return text wrapped in a div of the specified class.
-
- =cut
-
- sub div {
- my ($text, $class) = @_;
- my ($top, $result);
-
- if ($class) {
- $top = "<div class=\"$class\">\n";
- } else {
- $top = "<div>\n";
- }
-
- return ( $top . $text . "\n</div>\n" );
- }
-
-
- =item a()
-
- Returns an HTML link. Called all over the place.
-
- =cut
-
- sub a {
- my ($url, $text) = @_;
- return "<a href=\"$url\">$text</a>";
- }
-
-
- =item ornament()
-
- Returns a type ornament.
-
- =cut
-
- sub ornament {
- return '<small>§</small>';
- }
-
-
- =item image_size()
-
- Returns (width, height) of a variety of image files. Called by icon_markup and
- line_parse. Uses Image::Size if available, otherwise uses a couple of built-in
- routines munged together from pngsize and jpegsize in wwwis, by Alex Knowles
- and Andrew Tong.
-
- =cut
-
- sub image_size {
- my ($image_file) = shift;
-
- # Use Image::Size - this needs to be actually conditionalized.
-
- my ($x, $y, $type);
- ($x, $y, $type) = imgsize($image_file);
- return ($x, $y);
-
- # Otherwise we want to use our built-in routines:
-
- my ($head);
-
- if ( !open(IMAGE, '<', $image_file) ) {
- print STDERR "can't open IMG $image_file";
- return (0, 0);
- } else {
- binmode IMAGE;
- if ($image_file =~ m/\.png$/) { # it's a PNG
- my ($a, $b, $c, $d, $e, $f, $g, $h) = 0;
-
- if (defined($image_file)
- && read(IMAGE, $head, 8) == 8
- && ($head eq "\x8a\x4d\x4e\x47\x0d\x0a\x1a\x0a" ||
- $head eq "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a")
- && read(IMAGE, $head, 4) == 4
- && read(IMAGE, $head, 4) == 4
- && ($head eq "MHDR" || $head eq "IHDR")
- && read(IMAGE, $head, 8) == 8) {
- # ($x, $y) = unpack("I"x2, $head);
- # doesn't work on little-endian machines
- # return ($x,$y);
- ($a,$b,$c,$d,$e,$f,$g,$h) = unpack ("C"x8, $head);
- return ($a<<24|$b<<16|$c<<8|$d, $e<<24|$f<<16|$g<<8|$h);
- }
- } elsif ($image_file =~ m/\.jpe?g$/) { # it's a JPEG
- my($done) = 0;
- my($c1,$c2,$ch,$s,$length, $dummy) = (0,0,0,0,0,0);
- my($a,$b,$c,$d);
-
- if (defined($image_file)
- && read(IMAGE, $c1, 1)
- && read(IMAGE, $c2, 1)
- && ord($c1) == 0xFF
- && ord($c2) == 0xD8) {
- while (ord($ch) != 0xDA && !$done) {
- # Find next marker (JPEG markers begin with 0xFF)
- # This can hang the program!!
- while (ord($ch) != 0xFF) {
- return(0,0) unless read(IMAGE, $ch, 1);
- }
-
- # JPEG markers can be padded with unlimited 0xFF's
- while (ord($ch) == 0xFF) {
- return(0,0) unless read(IMAGE, $ch, 1);
- }
-
- # Now, $ch contains the value of the marker.
- if ((ord($ch) >= 0xC0) && (ord($ch) <= 0xC3)) {
- return(0,0) unless read (IMAGE, $dummy, 3);
- return(0,0) unless read(IMAGE, $s, 4);
- ($a,$b,$c,$d)=unpack("C"x4,$s);
- return ($c<<8|$d, $a<<8|$b );
- } else {
- # We **MUST** skip variables, since FF's within
- # variable names are NOT valid JPEG markers
- return(0,0) unless read (IMAGE, $s, 2);
- ($c1, $c2) = unpack("C"x2,$s);
- $length = $c1<<8|$c2;
- last if (!defined($length) || $length < 2);
- read(IMAGE, $dummy, $length-2);
- }
- }
- }
- }
-
- return (0,0);
- }
- }
-
- =back
-
- =head1 SEE ALSO
-
- walawiki.org, Blosxom, rassmalog, Text::Textile, XML::Atom::SimpleFeed,
- Image::Size, CGI::Fast.
-
- =head1 AUTHOR
-
- Copyright 2001-2007 Brennen Bearnes
-
- Image sizing code (in image_size) derived from wwwis, by Alex Knowles and
- Andrew Tong.
-
- display.pl is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- =cut
-
- 1;
|