| 1 |
# Switcher Module
|
| 2 |
#
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| 3 |
# Look for elements given in input has in a string
|
| 4 |
# If found then call a routine name with the same name
|
| 5 |
# Implemented as an object to maintain state info between each line
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# processed.
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# Interface
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# ---------
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#
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| 10 |
# new(file,objectref) : A new object - filename of file to parse
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# objectref->of the methods
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# usetags(tagobjref) : Specify a tagcontainer set to direct to
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| 13 |
# to the desired routines
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# usegroupchecker(groupchecker) : Set a groupchecker
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# parse() : Parse the file
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# line() : return the current line number of the parse
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# tagstartline() : return the line number on which the current
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# tag was opened
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# stream(filehandle) : stream output to the filehandle if not handled
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# in any other way
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package ActiveDoc::Switcher;
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| 22 |
use Utilities::Verbose;
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| 23 |
require 5.001;
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| 24 |
use Carp;
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| 25 |
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| 26 |
@ISA=qw(Utilities::Verbose);
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sub new {
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my $class=shift;
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my $file=shift;
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my $objectname=shift;
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my $groupchecker=shift;
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| 34 |
$self = {};
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$self->{allw}=$objectname;
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bless $self, $class;
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$self->_initialise($file);
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return $self;
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| 39 |
}
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sub stream {
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my $self=shift;
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| 43 |
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$self->{stream}=shift;
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}
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| 47 |
sub streamexclude {
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my $self=shift;
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my $tag=shift;
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$tag=~tr/A-Z/a-z/;
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$self->{streamexclude}{$tag}=1;
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}
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sub _initialise (hash1)
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{
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my $self=shift;
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$self->{filename}=shift;
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$self->verbose(">> New ActiveDoc::Switcher created.");
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# add a default groupchecker
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use ActiveDoc::GroupChecker;
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$self->{groupchecker}=GroupChecker->new();
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$self->{groupchecker}->include("all");
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# Add a default TagContainer
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use ActiveDoc::TagContainer;
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$self->{tagcontainer}=ActiveDoc::TagContainer->new();
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}
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sub usetags {
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my $self=shift;
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my $tagcontainer=shift;
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$self->{tagcontainer}=$tagcontainer;
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}
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sub usegroupchecker {
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my $self=shift;
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my $ref=shift;
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$self->{groupchecker}=$ref;
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}
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sub parse {
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my $self=shift;
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my $char;
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my $buf;
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$self->{linecount}=0;
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$self->_resetvars();
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$self->{streamstore}="";
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$self->{streamtmp}="";
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# Open the file
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use FileHandle;
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local $filehandle;
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$filehandle=FileHandle->new();
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$self->verbose(">> Reading file: ".$self->{filename}." ");
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$filehandle->open("<".$self->{filename})
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or return 1;
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# Start file processing
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while ( ($_=<$filehandle>) ) {
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$self->{linecount}++;
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# Skip lines that start with a hash. A better way
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# of adding comments than ignore tags:
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next if (/^#/);
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$self->{currentline}=$_;
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$self->{stringpos}=0;
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while ( ($char=$self->_nextchar()) ne "" ) {
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$self->_checkchar($char);
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} # end char while
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} # End String while loop
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undef $filehandle;
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# make sure we close the last buffer
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$self->_calltag($self->{textcontext}, $self->{textcontext},
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$self->_getstore());
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}
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sub parsefilelist
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{
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my $self=shift;
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my ($char,$buf);
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$self->{linecount}=0;
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$self->_resetvars();
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$self->{streamstore}="";
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$self->{streamtmp}="";
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foreach my $buildfile (@{$self->{filename}})
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{
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if ( -f $buildfile)
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{
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# Open the file
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use FileHandle;
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local $filehandle;
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$filehandle=FileHandle->new();
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$self->verbose(">> Reading file: ".$buildfile." ");
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$filehandle->open("<".$buildfile) or return 1;
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# Start file processing
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while ( ($_=<$filehandle>) )
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{
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$self->{linecount}++;
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# Skip lines that start with a hash. A better way
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# of adding comments than ignore tags:
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next if (/^#/);
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$self->{currentline}=$_;
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$self->{stringpos}=0;
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while ( ($char=$self->_nextchar()) ne "" )
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{
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$self->_checkchar($char);
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} # end char while
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} # End String while loop
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undef $filehandle;
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# Make sure we close the last buffer:
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$self->_calltag($self->{textcontext}, $self->{textcontext},
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$self->_getstore());
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}
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}
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}
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#
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# return the current line number
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#
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sub line {
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my $self=shift;
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return $self->{linecount};
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}
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# return the line the current tag was opened
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sub tagstartline {
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my $self=shift;
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$self->{tagstart};
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}
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# --------------- Utility routines ----------------------------
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#
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# Some initialisation of test suites
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#
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sub _resetvars {
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my $self=shift;
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$self->{quotes}=0;
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$self->{lastlabel}="";
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$self->{textcontext}='none';
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$self->{tagcontext}="text";
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$self->_resetstore();
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}
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#
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# Check for control characters
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#
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sub _checkchar {
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my $self=shift;
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my $char=shift;
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my $string;
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# ---- In a tag
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if ( $self->{tagcontext}=~/tag/ ) {
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$self->{tagbuff}=$self->{tagbuff}.$char;
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if ( ! $self->_quotetest($char) ) {
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if ( ! $self->_labeltest($char) ) {
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if ( $char eq ">") { $self->_closetag(); }
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else { $self->_putstore($char); }
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}
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}
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}
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# ------ Outside a tag
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else {
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if ( $char eq "<") { $self->_opentag() }
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else { $self->_putstore($char) }
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}
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}
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#
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# Return the next character from the current string buffer
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#
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sub _nextchar() {
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my $self=shift;
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my $char;
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$char=substr($self->{currentline},$self->{stringpos}++,1);
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# Keep a record for any stream processes
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$self->{streamstore}=$self->{streamstore}.$char;
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return $char;
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}
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sub _opentag {
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my $self=shift;
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my $char;
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# Keep a record of where the tag started
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$self->{tagstart}=$self->line();
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# Close the last text segment
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$self->{streamtmp}=$self->_popstream();
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$self->_calltag($self->{textcontext}, $self->{textcontext},
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$self->_getstore());
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$self->_resetstore();
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$self->_resetlabels();
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# Do we have an opening or closing tag?
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if ( ($char=$self->_nextchar()) eq "/" ) { #we have a closing tag
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$self->{tagbuff}="<".$char;
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$self->{tagcontext}="endtag";
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}
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else { # an opening tag
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$self->{tagbuff}="<";
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$self->{tagcontext}="starttag";
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$self->_checkchar($char);
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}
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}
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#
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# Close a tag
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#
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sub _closetag {
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my $self=shift;
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my $tagroutine;
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# -- Finish off any labels/get tagname
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$self->_closelabel();
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# -- Call the associated tag function if appropriate
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if ( defined $self->{tagname} ) {
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$tagroutine=$self->{tagname}."_".$self->{tagcontext};
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$self->_calltag($tagroutine, $self->{tagname},
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$self->{tagvar});
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# -- Now make sure the text context is set for calling routines to
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# -- deal with text portions outside of tags
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if ( ($self->{tagcontext} eq "starttag") ) {
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if ( $self->{tagcontainer}->definescontext($self->{tagname}) ) {
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push @{$self->{textstack}} , $self->{textcontext};
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$self->{textcontext}=$self->{tagname};
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}
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}
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else {
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| 284 |
if ( $#{$self->{textstack}} > -1 ) {
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| 285 |
if ( $self->{textcontext} eq $self->{tagname} ) {
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| 286 |
if ( $self->{tagcontainer}->definescontext($self->{tagname}) ) {
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# -- watch out for valid tags we ignore in this parse
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$self->{textcontext}=pop @{$self->{textstack}};
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}
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}
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else { #The tag we are closing is not the last one so
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# we keep our current context.
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$self->_removefromstack($self->{tagname},$self->{textstack});
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}
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}
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else { # more close tags than open ones
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| 298 |
if ( $self->{tagcontainer}->definescontext($self->{tagname}) ) {
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| 299 |
print "Warning : Unmatched </...> tag on line ".
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| 300 |
$self->line()."\n";
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| 301 |
}
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| 302 |
}
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| 303 |
}
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| 304 |
}
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# Reset context back to text
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| 306 |
$self->{tagcontext}="text";
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| 307 |
}
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| 308 |
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| 309 |
sub _calltag {
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| 310 |
my $self=shift;
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| 311 |
my $tagroutine=shift;
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| 312 |
my @args=@_;
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| 313 |
my $rt;
|
| 314 |
my $found=0;
|
| 315 |
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| 316 |
# print "TAGROUTINE: ",$tagroutine,"\n";
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| 317 |
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| 318 |
if ( $self->{groupchecker}->status() ||
|
| 319 |
( $self->{tagcontainer}->inquiregroup($tagroutine)) ) {
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| 320 |
($rt,$obj)=$self->{tagcontainer}->getroutine($tagroutine);
|
| 321 |
if ( $rt ne "" ) {
|
| 322 |
if ( ! defined $obj ) {
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| 323 |
&{$rt}( $self->{allw},@_);
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| 324 |
}
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| 325 |
else {
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| 326 |
&{$rt}( $obj,@_);
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| 327 |
}
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| 328 |
$found=1;
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| 329 |
}
|
| 330 |
}
|
| 331 |
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| 332 |
# stream function
|
| 333 |
if ( ! exists $self->{streamexclude}{$tagroutine} ) {
|
| 334 |
$self->_printstream();
|
| 335 |
}
|
| 336 |
$self->_clearstream();
|
| 337 |
}
|
| 338 |
|
| 339 |
sub _clearstream {
|
| 340 |
my $self=shift;
|
| 341 |
$self->{streamstore}=(($self->{streamtmp} ne "")?$self->{streamtmp}:"");
|
| 342 |
$self->{streamtmp}="";
|
| 343 |
}
|
| 344 |
|
| 345 |
sub _popstream {
|
| 346 |
my $self=shift;
|
| 347 |
$self->{streamstore}=~s/(.*)(.)$/$1/;
|
| 348 |
return $2;
|
| 349 |
}
|
| 350 |
|
| 351 |
sub _printstream {
|
| 352 |
|
| 353 |
my $self=shift;
|
| 354 |
|
| 355 |
# Stream output functionality
|
| 356 |
if ( defined $self->{stream} ) {
|
| 357 |
print {$self->{stream}} "$self->{streamstore}";
|
| 358 |
}
|
| 359 |
}
|
| 360 |
|
| 361 |
sub _removefromstack {
|
| 362 |
my $self=shift;
|
| 363 |
my $name=shift;
|
| 364 |
my $stack=shift;
|
| 365 |
my $this;
|
| 366 |
|
| 367 |
undef @tempstack;
|
| 368 |
# Keep popping until we find our string
|
| 369 |
while ( ($this=(pop @{$stack})) ne "$name") {
|
| 370 |
push @tempstack, $this;
|
| 371 |
if ( $#{$stack} < 0 ) { last; }
|
| 372 |
}
|
| 373 |
# Now put them back
|
| 374 |
while ( $#tempstack>-1) {
|
| 375 |
$this=pop @tempstack;
|
| 376 |
push @{$stack}, $this;
|
| 377 |
}
|
| 378 |
}
|
| 379 |
|
| 380 |
#
|
| 381 |
# Quote handling
|
| 382 |
#
|
| 383 |
|
| 384 |
sub _quotetest {
|
| 385 |
my $self=shift;
|
| 386 |
my $char=shift;
|
| 387 |
|
| 388 |
# --- Are we already in a quote context?
|
| 389 |
if ( $self->{quotes} ) {
|
| 390 |
if ( $char eq $self->{openquote} ) {
|
| 391 |
$self->{quotes}=0;
|
| 392 |
}
|
| 393 |
else {
|
| 394 |
$self->_putstore($char);
|
| 395 |
}
|
| 396 |
}
|
| 397 |
# --- Unquoted Context
|
| 398 |
elsif ( (($char eq "\"") || ($char eq "\'") || ($char eq "\`")) ) {
|
| 399 |
$self->{quotes}=1;
|
| 400 |
$self->{openquote}=$char;
|
| 401 |
}
|
| 402 |
else { return 0; } # Return zero if not quoted
|
| 403 |
return 1; # 1 otherwise
|
| 404 |
}
|
| 405 |
|
| 406 |
#
|
| 407 |
# Label handling
|
| 408 |
#
|
| 409 |
sub _labeltest {
|
| 410 |
my $self=shift;
|
| 411 |
my $char=shift;
|
| 412 |
|
| 413 |
# Spaces are markers between tags
|
| 414 |
if ( ($char eq " ") || ($char eq "\n") || ($char eq "\t")) {
|
| 415 |
$self->_closelabel();
|
| 416 |
}
|
| 417 |
# Check for a change in label status
|
| 418 |
elsif ( $char eq "=" ) {
|
| 419 |
$self->{lastlabel}=$self->_getstore();
|
| 420 |
$self->_resetstore();
|
| 421 |
}
|
| 422 |
else {
|
| 423 |
return 0;
|
| 424 |
}
|
| 425 |
return 1;
|
| 426 |
}
|
| 427 |
|
| 428 |
sub _resetlabels {
|
| 429 |
my $self=shift;
|
| 430 |
undef $self->{tagvar};
|
| 431 |
undef $self->{tagname};
|
| 432 |
}
|
| 433 |
|
| 434 |
sub _closelabel {
|
| 435 |
my $self=shift;
|
| 436 |
|
| 437 |
# Do we have a label name?
|
| 438 |
if ( $self->{lastlabel} ne "" ) {
|
| 439 |
(my $label=$self->{lastlabel})=~tr[A-Z][a-z];
|
| 440 |
$self->{tagvar}{$label}=$self->_getstore();
|
| 441 |
$self->{lastlabel}="";
|
| 442 |
}
|
| 443 |
elsif ( $self->_getstore() ne "") {
|
| 444 |
# Then it must be the tag name
|
| 445 |
if ( ! defined $self->{tagname} ) {
|
| 446 |
($self->{tagname}=$self->_getstore())=~tr/A-Z/a-z/;
|
| 447 |
}
|
| 448 |
else {
|
| 449 |
# do not die anymore - breaks non tag documents
|
| 450 |
#die ">Tag syntax error in $self->{tagname} on line ".
|
| 451 |
# $self->line()." of file \n$self->{filename}";
|
| 452 |
# -- assume that this is plain text
|
| 453 |
$self->{tagcontext}="text";
|
| 454 |
$self->_resetstore();
|
| 455 |
$self->_unshiftstore($self->{tagbuff});
|
| 456 |
$self->{tagbuff}="";
|
| 457 |
return;
|
| 458 |
}
|
| 459 |
}
|
| 460 |
$self->_resetstore();
|
| 461 |
}
|
| 462 |
|
| 463 |
#
|
| 464 |
# Character Store management interface
|
| 465 |
#
|
| 466 |
sub _putstore() {
|
| 467 |
my $self=shift;
|
| 468 |
my $char=shift;
|
| 469 |
|
| 470 |
$self->{stringbuff}=$self->{stringbuff}.$char;
|
| 471 |
}
|
| 472 |
|
| 473 |
sub _unshiftstore() {
|
| 474 |
my $self=shift;
|
| 475 |
my $char=shift;
|
| 476 |
|
| 477 |
$self->{stringbuff}=$char.$self->{stringbuff};
|
| 478 |
}
|
| 479 |
|
| 480 |
sub _getstore() {
|
| 481 |
my $self=shift;
|
| 482 |
|
| 483 |
return $self->{stringbuff};
|
| 484 |
}
|
| 485 |
|
| 486 |
sub _resetstore {
|
| 487 |
my $self=shift;
|
| 488 |
$self->{stringbuff}="";
|
| 489 |
}
|
