#! /usr/bin/perl
#
# Class name: Method
# Synopsis: Holds method info parsed by headerDoc
#
# Author: SKoT McDonald  <skot@tomandandy.com> Aug 2001
# Based on Function.pm, and modified, by Matt Morse <matt@apple.com>
# 
# Copyright (c) 1999-2001 Apple Computer, Inc.  All Rights Reserved.
# The contents of this file constitute Original Code as defined in and are
# subject to the Apple Public Source License Version 1.1 (the "License").
# You may not use this file except in compliance with the License.  Please
# obtain a copy of the License at http://www.apple.com/publicsource and
# read it before using this file.
#
# This Original Code and all software distributed under the License are
# distributed on an TAS ISU basis, WITHOUT WARRANTY OF ANY KIND, EITHER
# EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
# INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the License for
# the specific language governing rights and limitations under the
# License.
#
######################################################################
package HeaderDoc::Method;

use HeaderDoc::Utilities qw(findRelativePath safeName getAPINameAndDisc printArray printHash);
use HeaderDoc::HeaderElement;
use HeaderDoc::MinorAPIElement;
use HeaderDoc::APIOwner;

use strict;
use vars qw($VERSION @ISA);
$VERSION = '1.00';

# Inheritance
@ISA = qw( HeaderDoc::HeaderElement );

sub new {
    my($param) = shift;
    my($class) = ref($param) || $param;
    my $self = {};
    
    bless($self, $class);
    $self->_initialize();
    return($self);
}

sub _initialize {
    my($self) = shift;

    $self->SUPER::_initialize();
    $self->{RESULT} = undef;
    $self->{OWNER} = undef;
    $self->{ISINSTANCEMETHOD} = "UNKNOWN";
    $self->{TAGGEDPARAMETERS} = ();
    $self->{PARSEDPARAMETERS} = ();
}

sub setIsInstanceMethod {
    my $self = shift;
    
    if (@_) {
        $self->{ISINSTANCEMETHOD} = shift;
    }
    return $self->{ISINSTANCEMETHOD};
}

sub isInstanceMethod {
    my $self = shift;
    return $self->{ISINSTANCEMETHOD};
}

sub owner {  # class or protocol that this method belongs to
    my $self = shift;

    if (@_) {
        my $name = shift;
        $self->{OWNER} = $name;
    } else {
    	my $n = $self->{OWNER};
		return $n;
	}
}

sub result {
    my $self = shift;
    
    if (@_) {
        $self->{RESULT} = shift;
    }
    return $self->{RESULT};
}

sub taggedParameters {
    my $self = shift;
    if (@_) { 
        @{ $self->{TAGGEDPARAMETERS} } = @_;
    }
    ($self->{TAGGEDPARAMETERS}) ? return @{ $self->{TAGGEDPARAMETERS} } : return ();
}

sub addTaggedParameter {
    my $self = shift;
    if (@_) { 
        push (@{$self->{TAGGEDPARAMETERS}}, @_);
    }
    return @{ $self->{TAGGEDPARAMETERS} };
}


sub parsedParameters {
    my $self = shift;
    if (@_) { 
        @{ $self->{PARSEDPARAMETERS} } = @_;
    }
    ($self->{PARSEDPARAMETERS}) ? return @{ $self->{PARSEDPARAMETERS} } : return ();
}

sub addParsedParameter {
    my $self = shift;
    if (@_) { 
        push (@{$self->{PARSEDPARAMETERS}}, @_);
    }
    return @{ $self->{PARSEDPARAMETERS} };
}


sub processMethodComment {
    my $self = shift;
    my $fieldArrayRef = shift;
    my @fields = @$fieldArrayRef;
	foreach my $field (@fields) {
		SWITCH: {
			($field =~ /^\/\*\!/)&& do {last SWITCH;}; # ignore opening /*!
			($field =~ s/^method\s+//) && 
			do {
				my ($name, $disc);
				($name, $disc) = &getAPINameAndDisc($field); 
				$self->name($name);
				if (length($disc)) {$self->discussion($disc);};
				last SWITCH;
			};
			($field =~ s/^abstract\s+//) && do {$self->abstract($field); last SWITCH;};
			($field =~ s/^discussion\s+//) && do {$self->discussion($field); last SWITCH;};
			($field =~ s/^param\s+//) && 
			do {
				$field =~ s/^\s+|\s+$//g; # trim leading and trailing whitespace
	            $field =~ /(\w*)\s*(.*)/s;
	            my $pName = $1;
	            my $pDesc = $2;
	            my $param = HeaderDoc::MinorAPIElement->new();
	            $param->name($pName);
	            $param->discussion($pDesc);
	            $self->addTaggedParameter($param);
				last SWITCH;
			};
			($field =~ s/^result\s+//) && do {$self->result($field); last SWITCH;};
			print "Unknown field: $field\n";
		}
	}
}

sub getAPINameAndDisc {
    my $line = shift;
    my ($name, $disc, $operator);
    # first, get rid of leading space
    $line =~ s/^\s+//;
    ($name, $disc) = split (/\s/, $line, 2);
    if ($name =~ /operator/) {  # this is for operator overloading in C++
        ($operator, $name, $disc) = split (/\s/, $line, 3);
        $name = $operator." ".$name;
    }
    return ($name, $disc);
}

sub setMethodDeclaration {
    my $self = shift;
    my ($dec) = @_[0];
    my $classType = @_[1];
    my ($retval);
    my $localDebug = 0;
    
    print "============================================================================\n" if ($localDebug);
    print "Raw declaration is: $dec\n" if ($localDebug);
    
    # regularize whitespace
    $dec =~ s/^\s+(.*)/$1/; # remove leading whitespace
    $dec =~ s/[ \t]+/ /g;
    
	my $newdec = "";
	my @paramElements = split(/\:/, $dec);
	my $paramCount = 0;
	foreach my $paramTriple (@paramElements) {
		my $elementCount = 0;
		print "    paramTriple is |$paramTriple|\n" if ($localDebug);
		$paramTriple =~ s/ +/ /; # regularize spaces
		$paramTriple =~ s/^ +//; # remove leading whitespace
		$paramTriple =~ s/\) ?/\) /; # temporarily put spaces around the type declaration
		$paramTriple =~ s/ ?\(/ \(/; # for processing -- will be removed below

		my @paramParts = split(/ /, $paramTriple);
		foreach my $part (@paramParts) {
			if (($paramCount < $#paramElements || $#paramElements == 0) && $elementCount == $#paramParts) {
				if ($#paramElements == 0) {
					$part = "<B>$part</B>";
				} else {
					$part = "<B>$part:</B>";
				}	
			}	
			if (($paramCount > 0) && 
			      ((($paramCount < $#paramElements) && ($elementCount == $#paramParts - 1)) || (($paramCount == $#paramElements) && ($elementCount == $#paramParts)))) {
				$part = "<I>$part</I>";
			}
			$elementCount++;
			$newdec .= "$part ";
			#print "$newdec\n";
		}
		$paramCount++;
	}       
	
    # remove spaces around type declarations--that is around parens
    $newdec =~ s/\s+\(/(/g;
    $newdec =~ s/\)\s+/)/g;
    # reestablish space after - or +
    $newdec =~ s/^-/- /;
    $newdec =~ s/^\+/+ /;
    
    if ($newdec =~ /^\+/) {
    	$self->setIsInstanceMethod("NO");
    } elsif ($newdec =~ /^-/) {
    	$self->setIsInstanceMethod("YES");
    } else {
        print "#### Cannot determine whether method is class or instance method:\n";
        print "        $newdec\n";
    	$self->setIsInstanceMethod("UNKNOWN");
    }
    
	$retval = "<tt>$newdec</tt><br>\n";
    print "Formatted declaration is: $retval\n" if ($localDebug);
    print "============================================================================\n" if ($localDebug);
    $self->declarationInHTML($retval);
    return $retval;
}

sub documentationBlock {
    my $self = shift;
	my $name = $self->name();
	my $desc = $self->discussion();
	my $abstract = $self->abstract();
	my $declaration = $self->declarationInHTML();
	my $declarationRaw = $self->declaration();
	my @params = $self->taggedParameters();
	my $result = $self->result();
    my $apiUIDPrefix = HeaderDoc::APIOwner->apiUIDPrefix();
    my $owner = $self->owner();
    my $contentString;
    my $className= 'UNKNOWN_CLASSNAME';
    	
    if ($owner->can("className")) {  # to get the class name from Category objects
    	$className = $owner->className();
    } else {
    	$className = $owner->name();
    }
    
    print "#### Warning: couldn't determine owning class/protocol for method: $name\n" if ($className eq 'UNKNOWN_CLASSNAME');

	if ($declaration !~ /#define/) { # not sure how to handle apple_refs with macros yet
		my $methodType = $self->getMethodType($declarationRaw);
		$contentString .= "<a name=\"//$apiUIDPrefix/occ/$methodType/$className/$name\"></a>\n";
	}
	$contentString .= "<h3><a name=\"$name\">$name</a></h3>\n";
	if (length($abstract)) {
		$contentString .= "<b>Abstract:</b> $abstract\n";
	}
	$contentString .= "<blockquote><pre>$declaration</pre></blockquote>\n";
	$contentString .= "<p>$desc</p>\n";
	my $arrayLength = @params;
	if ($arrayLength > 0) {
		my $paramContentString;
		foreach my $element (@params) {
			my $pName = $element->name();
			my $pDesc = $element->discussion();
			if (length ($pName)) {
				$paramContentString .= "<tr><td align = \"center\"><tt>$pName</tt></td><td>$pDesc</td><tr>\n";
			}
		}
		if (length ($paramContentString)){
			$contentString .= "<h4>Parameters</h4>\n";
			$contentString .= "<blockquote>\n";
			$contentString .= "<table border = \"1\"  width = \"90%\">\n";
			$contentString .= "<thead><tr><th>Name</th><th>Description</th></tr></thead>\n";
				$contentString .= $paramContentString;
			$contentString .= "</table>\n</blockquote>\n";
		}
	}
	if (length($result)) {
		$contentString .= "<b>Result:</b> $result\n";
	}
	$contentString .= "<hr>\n";
}

sub getMethodType {
    my $self = shift;
	my $declaration = shift;
	my $methodType = "";
		
	if ($declaration =~ /^\s*-/) {
	    $methodType = "instm";
	} elsif ($declaration =~ /^\s*\+/) {
	    $methodType = "clm";
	} else {
		print "### Unable to determine whether declaration is for an instance or class method.\n";
		print "     '$declaration'\n";
	}
	return $methodType;
}

sub printObject {
    my $self = shift;
 
    print "Method\n";
    $self->SUPER::printObject();
    print "Result: $self->{RESULT}\n";
    print "Tagged Parameters:\n";
    my $taggedParamArrayRef = $self->{TAGGEDPARAMETERS};
    my $arrayLength = @{$taggedParamArrayRef};
    if ($arrayLength > 0) {
        &printArray(@{$taggedParamArrayRef});
    }
    print "\n";
}

1;

