# Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description:

#

use strict;

#

# constants

#

my $incrementY = 20;

my $leftMargin = 60;

my $rightMargin = 150;

my $topMargin = 20;

my $topOffset = $topMargin; # is this right Nadeem?

my $objectSpacing = 110;

my $arrowWidth = 10;

my $textArrowSpacing = 1;

my $messageSpacingAboveLine = 1;

my $objectVerticalLineSpacing = 2;

my $objectUnderlineToLifelineGap = 2;

my $objectName = 0;

my $objectX = 1;

my $objectY = 2;

my $objectMsgCount = 3;

my $objectCreationPointKnown = 4;

my $sequenceAction = 0;

my $sequenceObjRef = 1;		# if action == "t" || "oc"

my $sequenceMsgRef = 1;		# if action != "t"

my $sequenceX = 2;

my $sequenceY = 3;

my $trimSilentFlag = 0;

my $objectsDisplayedAtCreationPoint = 1;

#

# global variables

#

my $currentY = $topMargin;

my @sequences = ();

my @objects = ();

my @messages = ();

#

# Data Structures:

#

# "objects" is array of arrays:

#	[ <object name> <object X> <object Y> <object message count> <creation point known flag> ]

#

# "sequences" is an array of arrays:

#	[ "t" \objects[<n>] "text" ]

#	[ "[p|r]" \messages[n] \objects[<source>], \objects[<destination>] ]

#	[ "oc" \objects[<n>] ]

# Input file format:

#

#	<action> <arguments> ...

#

# specifically:

#

#	[P|R] <message name> <source object> <destination object>

#	T <object> <text>

#	OC <object>

#

# actions:

#

# P		Post

# R		Receive

# T		Text

# OC	Object Create

#

# All fields are space separated text.  For example:

#

# P StartFlow SCPR Flow

#

while (<>) {

	die unless s/^(\w+)\s+//;

	my $action = $1;

	if ($action eq "t")

		{

		# Text

		# t <object> <text>

		my $pos;

		if (s/^(\w+)\s+//) { $pos = $1; }

		my $objRef = addObject($pos);

		chomp;

		my $text = $_;

		push @sequences, [$action, $objRef, $text];

		}

	elsif ($action eq "oc")

		{

		# Object Create

		# oc <object>

		my $objName;

		if (s/^(\w+)\s+//) { $objName = $1; }

		my $objRef = addObject($objName);

		${$objRef}->[$objectCreationPointKnown] = 1;

		chomp;

		push @sequences, [$action, $objRef];

		}

	else

		{

		# Post/Receive

		# [P|R] <message> <source object> <destination object>

		split;

		my $msgRef = addMessage(shift @_);

		my $srcRef = addObject(shift @_);

		my $destRef = addObject(shift @_);

		${$srcRef}->[$objectMsgCount]++;

		${$destRef}->[$objectMsgCount]++;

		push @sequences, [$action, $msgRef, $srcRef, $destRef];

		}

	}

if ($trimSilentFlag)

	{

	trimSilentObjects();

	}

calculateObjectRowPositions();

my $screenWidth = $objects[$#objects]->[$objectX] + $rightMargin;

my $screenHeight = scalar(@sequences) * ($incrementY + 2) + $topMargin;

outputDocHeader($screenWidth, $screenHeight);

drawObjectsAtTop();

drawObjectsRepeatedly();

drawSequences();

outputDocFooter();

####################

# Message routines

####################

sub addMessage()

	{

	my $obj = $_[0];

	my $i;

	for ($i = 0 ; $i < scalar(@messages) ; ++$i) {

		if ($messages[$i] eq $obj) {

			return \$messages[$i];

			}

		}

	$messages[$i] = $obj;

	return \$messages[$i];

	}

sub printMessages()

	{

	print "Messages (", scalar(@messages), ") : ";

	foreach my $msg (@messages) {

		print $msg, " ";

		}

	print "\n";

	}

###################

# Object routines

###################

sub addObject()

	{

	my $objName = $_[0];

	my $i;

	for ($i = 0 ; $i < scalar(@objects) ; ++$i) {

		if ($objects[$i]->[$objectName] eq $objName) {

			return \$objects[$i];

			}

		}

		$objects[$i] = [ $objName, 0, 0, 0, 0 ];

		return \$objects[$i];

	}

sub printObjects()

	{

	print "Objects (", scalar(@objects), "): ";

	foreach my $obj (@objects) {

		print $obj->[0], "(", $obj->[1], ") ";

		}

	print "\n";

	}

sub calculateObjectRowPositions()

	{

	# first object position is at left margin

	$objects[0][$objectX] = $leftMargin;

	my $i;

	for ($i = 1 ; $i < scalar(@objects) ; ++$i) {

		$objects[$i][$objectX] = $objects[$i-1][$objectX] + $objectSpacing;

		}

	}

sub trimSilentObjects()

	{

	# get rid of objects that didn't end up with any messages sent to/from them

	my $i;

	for ($i = 0 ; $i < scalar(@objects) ; ) {

		if ($objects[$i][$objectMsgCount] == 0)

			{

			my $j;

			for ($j = 0 ; $j < scalar(@sequences) ; )

				{

				my $action = $sequences[$j][$sequenceAction];

				if ( (($action eq "t") || ($action eq "oc")) &&

				     ($sequences[$j][$sequenceObjRef] == \$objects[$i]) )

				    {

					splice @sequences, $j, 1;

#print "delete sequence $j\n";

#++$j;

					}

				else

					{

					++$j;

					}

				}

			splice @objects, $i, 1;

#print "delete object $i $objects[$i][$objectName]\n";

#++$i;

			}

		else

			{

			++$i;

			}

		}

	}

sub drawObject($$$)

	{

	my ($x,$y,$name) = @_;

	outputText($x, $name, $y, "middle", "underline");

	outputVerticalLine($x, $y + $objectUnderlineToLifelineGap, $screenHeight - $topOffset);

	}

sub drawObjectsAtTop()

	{

	my $i;

	foreach $i (@objects) {

		if ($objectsDisplayedAtCreationPoint == 1 && $i->[$objectCreationPointKnown] == 1)

			{

			next;

			}

		outputText($i->[$objectX], $i->[$objectName], $currentY, "middle", "underline");

		} 

	incrementY();

	drawObjectLifelines();

	}

sub drawObjectsRepeatedly()

	{

		my $i;

		foreach $i (@objects)

		{

			for( my $j = 400 ; $j < $screenHeight ; $j += 400 )

			{

				outputText($i->[$objectX], $i->[$objectName], $j, "middle", "","silver");

			}

		}

	}

sub drawSequences()

	{

	foreach my $ref (@sequences) {

		my $action = $ref->[$sequenceAction];

		if ($action eq "t")

			{

			my $objX = ${$ref->[$sequenceObjRef]}->[$objectX];

			my $text = $ref->[2];

			outputText($objX, $text, $currentY, "middle");

			incrementY();

			}

		elsif ($action eq "oc") 

			{

			if ($objectsDisplayedAtCreationPoint == 1)

				{

				my $objX = ${$ref->[$sequenceObjRef]}->[$objectX];

				my $objName = ${$ref->[$sequenceObjRef]}->[$objectName];

				drawObject($objX, $currentY, $objName);

				incrementY();

				}

			}

		else

			{

			my $msg = ${$ref->[$sequenceObjRef]};

			my $srcX = ${$ref->[$sequenceX]}->[$objectX];

			my $destX = ${$ref->[$sequenceY]}->[$objectX];

			my $align;

			if ($action eq "p") {

				$align = "tail";

				}

			elsif ($action eq "r") {

				$align = "head";

				}

			outputLabelledLine($srcX, $destX, $msg, $align);

			incrementY();

			}

		}

	}

sub drawObjectLifelines()

	{

	my $topOffset = $topMargin + $objectVerticalLineSpacing;

	foreach my $i (@objects) {

		if ($objectsDisplayedAtCreationPoint == 0 || $i->[$objectCreationPointKnown] == 0)

			{

			outputVerticalLine($i->[$objectX], $topOffset, $screenHeight - $topOffset);

			}

		}

	}

#######################

# SVG output routines

#######################

sub outputDocHeader()

	{

	my ($width,$height) = @_;

	print '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>',"\n";

	print '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">',"\n";

	print "<svg height=\"$height\" width=\"$width\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n";

	outputDefs();

	}

sub outputDefs()

	{

	print "<defs>\n";

	print qq{<marker id="arr" markerHeight="10" markerUnits="strokeWidth" markerWidth="10" orient="auto" refX="10" refY="5" viewBox="0 0 10 10">\n};

	print qq{\t<path d="M 0 0 L 10 5 L 0 10 " />\n};

	print "</marker>\n";

	print "</defs>\n";

	}

sub outputDocFooter()

	{

	print "</svg>\n";

	}

sub outputLabelledLine()

	{

	my ($x1,$x2,$text,$alignment) = @_;

	outputLine($x1,$x2);

	my $textx;

	my $anchor;

	my $colour = 'grey';

	if (!$alignment || $alignment eq "mid") {

		$textx = (($x1 + $x2) / 2);

		$anchor = "middle";

		}

	else {

		if ($alignment eq "head") {

			$colour='red';

			if ($x1 < $x2) {

				$anchor = "end";

				$textx = $x2 - $arrowWidth - $textArrowSpacing;

				}

			else {

				$anchor = "start";

				$textx = $x2 + $arrowWidth + $textArrowSpacing;

				}

		} else {	# "tail"

			$colour='green';

			$textx = $x1;

			if ($x1 < $x2) {

				$anchor = "start";

			} else {

				$anchor = "end";

				}

			}

		}

	outputText($textx,$text,$currentY - $messageSpacingAboveLine, $anchor,'',$colour);

	}

sub outputText()

	{

	my ($x,$text,$y,$anchor,$decoration,$colour) = @_;

	my $attrs = qq{ x="$x" y="$y" };

	if ($decoration)

		{

		$attrs .= qq{ text-decoration="$decoration" };

		}

	if ($colour)

		{

		$attrs .= qq{ stroke="$colour" };

		}

	if ($anchor)

		{

		$attrs .= qq { text-anchor="$anchor" };

		}

	print "<text $attrs>$text</text>\n";

	}

sub outputLine()

	{

	my ($x1,$x2) = @_;

	print qq{<line stroke="black" marker-end="url(#arr)" x1="$x1" y1="$currentY" x2="$x2" y2="$currentY" />\n};

	}

sub outputVerticalLine()

	{

	my ($x,$y1,$y2) = @_;

	print qq{<line stroke="black" x1="$x" y1="$y1" x2="$x" y2="$y2" />\n};

	}

sub incrementY()

	{

	my $amount;

	if ($_[0]) {

		$amount = $_[0];

	} else {

		$amount = 1;

	}

	$currentY += $incrementY * $amount;

	}