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williamc |
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#
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# PreProcessedFile.pm
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#
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# Originally Written by Christopher Williams
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#
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# Description
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# -----------
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# Handle Preprocessed file information
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#
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# Interface
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# ---------
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# new() : A new PreProcessedFile object
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# url([url]) : return the full url. With an argument will take the given
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# url and expand it in the context of the current url base.
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# file() : return the filename corresponding to url of the document
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# ProcessedFile() : return the filename corresponding to processed url
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# of the document
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# line(number) : Return the line and fileobj corresponding to number in
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# processed file
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# includefile(PreProcessedFileID, startline, endline, lines_in_file) :
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# indicate a file object to be included in place of
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# startline-endline in original file.
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# update() : update the preprocessed file as required.
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# store(filename) :
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# restore(filename) :
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package ActiveDoc::PreProcessedFile;
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use ActiveDoc::ActiveDoc;
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require 5.004;
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@ISA=qw(ActiveDoc::ActiveDoc);
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sub init {
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my $self=shift;
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$self->{lastsequence}=-1;
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# Specific Tags
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$self->newparse("include");
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$self->addurltags("include");
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$self->addtag("include","Include", \&Include_Start, $self,
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"", $self, "", $self);
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}
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sub line {
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my $self=shift;
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my $origline=shift;
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my $fileob=$self;
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my $line=$origline;
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foreach $inc ( @{$self->{includes}} ) {
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$startline=$inc->startline();
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last if ( $line < $startline );
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if ( $line > ($inc->lines()+$startline) ) {
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$line=$line-$inc->lines()+1+($inc->endline()-$startline);
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# n lines in original map to m lines in expanded
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}
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else { # must be in the include file
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@fileobs=$self->config()->find($inc->file());
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print $inc->file()." line = $line-$startline $fileob\n";
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($line, $fileob)=$fileobs[0]->line($line-$startline+1);
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}
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}
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print "line = $line $fileob\n";
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return ($line, $fileob);
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}
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sub url {
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my $self=shift;
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if ( @_ ) {
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my $url=shift;
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($self->{url}, $file)=$self->{urlhandler}->get($url);
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}
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else {
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$self->{url};
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}
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}
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sub ProcessedFile {
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my $self=shift;
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$self->config()->cache()->file("_preprocess_".$self->url());
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}
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sub file {
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my $self=shift;
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my ($url, $file)=$self->{urlhandler}->get($self->url());
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print $file." = File\n";
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return $file;
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}
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sub includefile {
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use ActiveDoc::IncFile;
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my $self=shift;
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my $fileobj=shift;
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my $startline=shift;
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my $endline=shift;
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my $lines=shift;
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my $obj=IncFile->new();
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push @{$self->{includes}}, $obj;
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$obj->init($fileobj,$startline,$endline,$lines);
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}
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sub update {
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my $self=shift;
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my $rv=0;
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print "\nEntering Updating ".$self->url()."\n";
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# check file update OK
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if ( $self->{lastsequence} !=
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$self->config()->cache()->updatenumber($self->url()) ){
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$rv=1;
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}
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# check dependencies
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foreach $inc ( @{$self->{includes}} ) {
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@fileobs=$self->config()->find($inc->file());
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$rv=$rv+$fileobjs[0]->update();
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if ( $inc->lastsequence() ne
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$self->ObjectSpace->sequence($inc->file()) ) {
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$rv=0;
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}
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}
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if ( $rv ) {
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print " Need to Update\n";
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# ---- sort out the preprocessed file in the cache
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my $newfile=$self->config()->cache()->
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filename("_preprocess_".$self->url());
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$self->config()->cache()->store("_preprocess_".$self->url(),$newfile);
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$self->process($self->config()->cache()->file($self->url()),$newfile);
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$self->{lastsequence}++;
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}
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return $rv;
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}
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sub process {
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my $self=shift;
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my $filein=shift;
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my $fileout=shift;
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#-- create a new file in the url cache
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print "PreProcessing $file\n output= $fileout \n";
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$self->_cleanup();
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$self->{fileout}=FileHandle->new();
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$self->{fileout}->open(">".$fileout) or die "Unable to open $newfile\n"
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."$!\n";
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# turn on the switch streamer
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$self->parse("include", $self->{fileout}, "include_starttag");
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$self->{fileout}->close();
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}
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sub store {
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my $self=shift;
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my $location=shift;
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my $fh=$self->openfile(">".$location);
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# get all include objects to store themselves
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print $fh $self->{lastsequence}."\n";
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print $fh ($self->url()?$self->url():"");
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print $fh "\n";
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foreach $inc ( @{$self->{includes}} ) {
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print $fh ">\n";
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$inc->store($fh);
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}
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close $fh;
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}
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sub restore {
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my $self=shift;
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my $location=shift;
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my $fh=$self->openfile($location);
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$self->{lastsequence}=<$fh>;
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chomp $self->{lastsequence};
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$self->{url}=<$fh>;
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chomp $self->{url};
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while ( <$fh> ) {
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if ( $_ eq ">") {
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$inc=IncFile->new();
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$inc->restore($fh);
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push @{$self->{includes}}, $inc;
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}
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}
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$fh->close();
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}
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sub _cleanup {
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my $self=shift;
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foreach $inc ( @{$self->{includes}} ) {
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undef $inc;
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}
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undef @{$self->{includes}};
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}
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# ------------------------ Tag Routines -------------------------------
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#
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# Include tag
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sub Include_Start {
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my $self=shift;
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my $name=shift;
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my $hashref=shift;
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$self->checktag( $name,$hashref, "url");
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print "Including ".$$hashref{'url'}."\n";
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my $fileObj=$self->getfile($$hashref{'url'});
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if ( defined $fileObj ) {
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push @{$self->{includes}}, $fileObj;
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# dump out to our file in construction
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my $fh=FileHandle->new();
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my $outfilename=$fileObj->ProcessedFile();
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print "Opening ".$fileObj->ProcessedFile()." for inclusion\n";
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$fh->open("<".$outfilename) or die "Unable to open $outfilename\n";
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print {$self->{fileout}} "\n";# always start an include on a new line
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while ( <$fh> ) {
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print {$self->{fileout}} $_;
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}
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print {$self->{fileout}} "\n";# always end include with new line
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undef $fh;
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}
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}
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