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

# Copyright (C) 2008 ERG Limited, All rights reserved

#

# Module name   : qt-builder.pm

# Module type   : Makefile system

# Compiler(s)   : Perl

# Environment(s): jats

#

# Description   : Provide JATS build support for the QT SDK

#                 This module hoosk into the internals of JATS

#                 It tries to be generic, buts its not easy

#

#......................................................................#

require 5.008_002;

use strict;

use warnings;

use MakeEntry;

#

#   Global Varibales

#

our %SRC_DEPEND;                        # Source file dependencies

our %SRC_ARGS;                          # Source file arguments

#

#   Local variables

#

my $qt_package;                         # Ref to package containing QT

my %qt_used;                            # Track Used items

#-------------------------------------------------------------------------------

# Function        : BEGIN

#

# Description     : Setup directive hooks

#                   Register to be told about source files that are QT specific

#

# Inputs          : None

#

# Returns         : None

#

BEGIN

{

    #

    #   Locate the QT package

    #   Done by looking for the include/QtGui directory

    #       If we don't find it then don't install the Qt hooks

    #       Generate a warning when Qt is 'Used'

    #       This allows for the building of packages that have Qt and Non-Qt parts

    #

    foreach my $entry ( getPackageList() )

    {

        foreach my $path ( $entry->getIncDirs(1) )

        {

            if ( -d "$path/QtGui" )

            {

                $qt_package = $entry;

                last;

            }

        }

    }

    #

    #   Qt not supported in this type of a build

    #   Just exist now. Will create an error if QtUses is activated

    #

    return

        unless ( $qt_package );

    #

    #   Define QT specfic rules.

    #   Will be found in the same directory as this file

    #

    Rules ( StripFileExt( __FILE__ ), 'qt.rul' );

    #

    #   Register interest in various types of source file

    #   Currently only header files are examined for MOC processing

    #

    RegisterSrcHook ('.qrc', \&src_hook_qrc );

    RegisterSrcHook ('.ui',  \&src_hook_ui );

    RegisterSrcHook ('.h',   \&src_hook_h );

    RegisterSrcHook ('.cpp', \&src_hook_cpp );

    #

    #   Files will be placed into the OBJDIR

    #   Ensure that the compiler searches this directory

    #

    AddIncDir( '*' , "\$(OBJDIR)", '--NoWarn' );

}

#-------------------------------------------------------------------------------

# Function        : QtUses

#

# Description     : User directive to provide information as to which parts of

#                   Qt are being used.

#

#                   Done this way for two reasons:

#                       1) Allow the Include path to be extended

#                          Qt has a lot of subdirs in 'include'

#                          Placing all of these in the include path

#                          slows down the compilation

#

#                       2) Allow JATS to provide a '--Uses' construct for

#                          programs and shared libraries taht provide a machine

#                          independent mechanism for adding the required libs

#

# Inputs          : $platforms          - Platform predicate

#                   @components         - Compoents to use

#

# Returns         : 

#

sub QtUses

{

    my ($platforms, @components) = @_;

    Debug( "QtUses: ",$platforms, @components );

    return if ( ! ActivePlatform($platforms) );

    Error ("Cannot find the Qt Base Package, or Qt is not supported", "on this platform") unless ( $qt_package );

    foreach my $component ( @components )

    {

        #

        #   Only do it once

        #

        next if ( exists $qt_used{$component} );

        $qt_used{$component} = 1;

        #

        #   Extend the header search path to include the required headers

        #

        my $dir;

        foreach my $path ( $qt_package->getIncDirs(2) )

        {

            if ( -d "$path/$component" )

            {

                $dir = "$path/$component";

                last;

            }

        }

        Error ("Qt component not supported: $component")

             unless ( $dir );

        AddIncDir ('*', '--NoWarn','--System', $dir );

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

#

#   Following code currently not active

#   There is no one-one relationship between QT include dirs and libraries

#

#   Dont know how Trolltech  do it. Might be hard coded

#

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

#

#        #

#        #   Extend a --Users(QT) definition to provide libraries for the user

#        #   There are problems

#        #       Under windows, some of the libraries have a 4 suffix

#        #   Need to determine the exact name of the library

#        #   Normally this knowledge is buried within the compiler/linker and

#        #   some JATS tools.

#        #

#        #   Algorithm:

#        #       Given a library name, determine if the file exists

#        #       under both windows and linux

#        #           If Unix - prefix with lib

#        #           If Unix - try shared-lib, static lib suffix

#        #           If Windows - try static lib suffix

#        #

#        my @prefix = ('', 'lib');

#        my @suffix = ($::so, $::a );

#        my $found;

#        HUNT:

#        foreach my $qtsuf ( '4', '' )

#        {

#            foreach my $suffix ( @suffix )

#            {

#                foreach my $prefix ( @prefix )

#                {

#                    my $cname = $prefix . $component . $qtsuf . '.' . $suffix;

#                    foreach my $path ( $qt_package->getLibDirs(2) )

#                    {

#                        if ( -f "$path/$cname" )

#                        {

#                            $found = $component . $qtsuf;

#                            last HUNT;

#                        }

#                    }

#                }

#            }

#        }

#

#        Error ("QT library component not supported: $component")

#            unless ( $found );

#

#        MakeIf::Libaries ( 'QT', '*', "-L$found");

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

    }

}

#-------------------------------------------------------------------------------

# Function        : src_hook_qrc

#

# Description     : This function will be invoked when a .QRC file

#                   is encountered in the Src directive

#

#                   .qrc file are QT resource files

#                   These need to be processed into .cpp file

#                   and the .cpp file needs to be converted into an object file

#

# Inputs          : $path           - Source path

#                   $path           - Source file name

#                   $obj            - Base file name (no dir or ext)

#                   $ext            - Extension

#

# Returns         : 

#

sub src_hook_qrc

{

    Debug ("src_hook_qrc: @_");

    my ( $srcfile ,$path, $obj, $ext ) = @_;

    my @dlist = ();

    #

    #   The .qrc file will be converted into a cpp file

    #   Treat the .cpp file as a source file in its own right

    #

    $obj = 'qrc_' . $obj;

    my $csource = '$(OBJDIR)/' . $obj . '.cpp' ;

    GenerateSrcFile ( 1, $csource  );

    #

    #   The user may have specified some dependencies

    #   Create a list of these to be a part of the generated Rule

    #

    @dlist = split( /$;/, $SRC_DEPEND{$path} )

        if ( exists $SRC_DEPEND{$path} );

    #

    #   Parse the source file and extract dependencies

    #       The file is of a known XML format

    #       Depenedencies are not nested

    #       Implement a simple parser

    #

    #   Look for lines of the form:

    #       <file ....>FileName</file>

    #

    #   The source file may not acually exist. It may be symbolic

    #   If the file doesn't exist, then don't complain.

    #

    if ( -e $srcfile )

    {

        if (open (SF, '<', $srcfile ))

        {

            my $srcdir = StripFileExt( $srcfile );

            $srcdir .= '/' if ( $srcdir );

            while ( <SF> )

            {

                if ( m~<file.*>(.*)</file>~ )

                {

                    my $name = $1;

                    $name =~ s~([ ,])~\\$1~g;

                    push @dlist, "$srcdir$name";

                }

            }

            close SF;

        }

    }

    #

    #   Create a Rule to build this file

    #   Will be placed in the Rules section

    #

    my $var;

    my $me = MakeEntry::New (\$var, $csource );

#    $me->AddComment ("QT Resource Compiler: $path" );

    $me->AddDependancy ( $srcfile );

    $me->AddDependancy ( @dlist );

    $me->AddDependancy ( '$(SCM_MAKEFILE)' );

    $me->AddDependancy ( '$(GBE_OBJDIR)' );

    $me->AddRecipe     ( '$(XX_PRE)$(QT_RCC)' );

    $me->Print();

    ToolsetRule ( $var );

}

#-------------------------------------------------------------------------------

# Function        : src_hook_ui

#

# Description     : This function will be invoked when a .UI file

#                   is encountered in the Src directive

#

#                   .ui file are QT User Interface files

#                   These need to be processed into header files

#                   by the User Interface Compiler

#

# Inputs          : $path           - Source path

#                   $path           - Source file name

#                   $obj            - Base file name (no dir or ext)

#                   $ext            - Extension

#

# Returns         : 

#

sub src_hook_ui

{

    Debug ("src_hook_ui: @_");

    my ( $srcfile ,$path, $obj, $ext ) = @_;

    #

    #   Convert the UI file into a header file

    #   Place the header file in the OBJ directory

    #

    my $target = "\$(OBJDIR)/ui_$obj.h";

    GenerateSrcFile ( 1, $target  );

    #

    #   The user may have specified some dependencies

    #   Create a list of these to be a part of the generated Rule

    #

    my @dlist = split( /$;/, $SRC_DEPEND{$path} )

        if ( exists $SRC_DEPEND{$path} );

    #

    #   Create a Rule to build this file

    #   Will be placed in the Rules section

    #

    my $var;

    my $me = MakeEntry::New (\$var, $target );

#    $me->AddComment ("QT User Interface File: $path" );

    $me->AddDependancy ( $srcfile );

    $me->AddDependancy ( @dlist );

    $me->AddDependancy ( '$(SCM_MAKEFILE)' );

    $me->AddDependancy ( '$(GBE_OBJDIR)' );

    $me->AddRecipe     ( '$(XX_PRE)$(QT_UIC)' );

    $me->Print();

    ToolsetRule ( $var );

}

#-------------------------------------------------------------------------------

# Function        : src_hook_h

#

# Description     : This function will be invoked when a .h file

#                   is encountered in the Src directive

#

#                   If the file is flagged as --Moc then it will treated

#                   by the MOC processor

#

# Inputs          : $path           - Source path

#                   $path           - Source file name

#                   $obj            - Base file name (no dir or ext)

#                   $ext            - Extension

#

# Returns         : 

#

sub src_hook_h

{

    Debug ("src_hook_h: @_");

    my ( $srcfile ,$path, $obj, $ext ) = @_;

    #

    #   Only interested in files that are flagged as --Moc

    #

    return unless ( $SRC_ARGS{ $path } && grep (/^--Moc$/i, split( /$;/, $SRC_ARGS{$path} ) ) );

    #

    #   The file will be converted into a cpp file

    #   Treat the .cpp file as a source file in its own right

    #

    $obj = 'moc_' . $obj;

    my $csource = '$(OBJDIR)/' . $obj . '.cpp' ;

    GenerateSrcFile ( 1, $csource  );

    #

    #   The user may have specified some dependencies

    #   Create a list of these to be a part of the generated Rule

    #

    my @dlist = split( /$;/, $SRC_DEPEND{$path} )

        if ( exists $SRC_DEPEND{$path} );

    #

    #   Create a Rule to build this file

    #   Will be placed in the Rules section

    #

    my $var;

    my $me = MakeEntry::New (\$var, $csource );

#    $me->AddComment ("QT Meta Object Compiler: $path" );

    $me->AddDependancy ( $srcfile );

    $me->AddDependancy ( @dlist );

    $me->AddDependancy ( '$(SCM_MAKEFILE)' );

    $me->AddDependancy ( '$(GBE_OBJDIR)' );

    $me->AddRecipe     ( '$(XX_PRE)$(QT_MOC)' );

    $me->Print();

    ToolsetRule ( $var );

}

#-------------------------------------------------------------------------------

# Function        : src_hook_cpp

#

# Description     : This function will be invoked when a .cpp file

#                   is encountered in the Src directive

#

#                   If the file is flagged as --Moc then it will treated

#                   by the MOC processor

#

# Inputs          : $path           - Source path

#                   $path           - Source file name

#                   $obj            - Base file name (no dir or ext)

#                   $ext            - Extension

#

# Returns         : 

#

sub src_hook_cpp

{

    Debug ("src_hook_cpp: @_");

    my ( $srcfile ,$path, $obj, $ext ) = @_;

    #

    #   Only interested in files that are flagged as --Moc

    #

    return unless ( $SRC_ARGS{ $path } && grep (/^--Moc$/i, split( /$;/, $SRC_ARGS{$path} ) ) );

    #

    #   The file will be converted into a .moc file as shown in the QT doco

    #   Treat the .moc file as a source file in its own right

    #

    my $csource = '$(OBJDIR)/' . $obj . '.moc' ;

    GenerateSrcFile ( 1, $csource  );

    #

    #   The user may have specified some dependencies

    #   Create a list of these to be a part of the generated Rule

    #

    my @dlist = split( /$;/, $SRC_DEPEND{$path} )

        if ( exists $SRC_DEPEND{$path} );

    #

    #   Create a Rule to build this file

    #   Will be placed in the Rules section

    #

    my $var;

    my $me = MakeEntry::New (\$var, $csource );

#    $me->AddComment ("QT Meta Object Compiler: $path" );

    $me->AddDependancy ( $srcfile );

    $me->AddDependancy ( @dlist );

    $me->AddDependancy ( '$(SCM_MAKEFILE)' );

    $me->AddDependancy ( '$(GBE_OBJDIR)' );

    $me->AddRecipe     ( '$(XX_PRE)$(QT_MOC)' );

    $me->Print();

    ToolsetRule ( $var );

}

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