meson.build

project (
    'com.wpkelso.appcons',
    version: '0.0.1',
    meson_version: '>=0.61',
)

i18n = import('i18n')
fs = import('fs')

icon_dir = join_paths(get_option('datadir'), 'icons', 'appcons')

scale_factors = get_option('scale_factors')

# Add a directory here to the list if needed.
directories = [
    # The first argument is the name of the folder,
    # the second is the associated Context
    ['apps', 'Applications'],
]

# Add a size here to the list if needed.
sizes = ['16', '24', '32', '48', '64', '128', 'symbolic']

# Symbolic icons are made to have a maximum size.
max_size_symbolic = '512'

# This is the minimal size all icons can theorically have.
min_size_ever = '8'

# Let's do fancy things
msg_warning = false
msg = '\nPLEASE VERIFY THE CONFIGURATION:'

if (sizes.length() >= 7)
    msg += '\nAvailable sizes:           @0@ ✔'.format (', '.join (sizes))
else
    msg += '\nAvailable sizes:           @0@ ⛔'.format (', '.join (sizes))
    msg_warning = true
endif

if (scale_factors.length() > 1)
    msg += '\nAvailable scale factors:   @0@ ✔'.format (', '.join (scale_factors))
else
    msg += '\nAvailable scale factors:   @0@ ⛔'.format (', '.join (scale_factors))
    msg_warning = true
endif

if (get_option('prefix') == '/usr')
    msg += '\nInstallation prefix:       @0@ ✔'.format (get_option('prefix'))
else
    msg += '\nInstallation prefix:       @0@ ⛔'.format (get_option('prefix'))
    msg_warning = true
endif

if (msg_warning)
    warning(msg + '\n')
else
    message(msg + '\n')
endif

# Here begins the real work
foreach directory : directories
    install_subdir(
        directory[0],
        install_dir : icon_dir
    )
endforeach

template = '''
[@0@]
Size=@1@@2@
Context=@3@
MinSize=@4@
MaxSize=@5@
Type=Scalable'''

directory_path_list = []
directory_details = []

foreach directory_entry : directories
    directory = directory_entry[0]
    directory_context = directory_entry[1]
    foreach size: sizes
        if (fs.exists(meson.project_source_root () / directory / size))
            foreach scale_factor : scale_factors
                # The Scale=1 attribute is useless, don't add it
                if (scale_factor.to_int() > 1)
                    scale_entry = '\nScale=@0@'.format (scale_factor)
                    directory_name = join_paths('@0@@@1@x'.format (directory, scale_factor), size)
                else
                    scale_entry = ''
                    directory_name = join_paths(directory, size)
                endif

                # Append it to add it to the final Directories= line
                directory_path_list += directory_name

                if (size == 'symbolic')
                    size_entry = '16'
                    # symbolic covers the whole size panel by definition
                    max_size = max_size_symbolic
                else
                    size_entry = size
                    # Get the next size on the list
                    size_found = false
                    foreach lookup_size: sizes
                        if (size == lookup_size)
                            size_found = true
                        # if the next size if 'symbolic', that means that this is the biggest size.
                        elif (size_found == true)
                            if (lookup_size == 'symbolic')
                                max_size = max_size_symbolic
                            else
                                # the maximal icon size of an entry is the next available size minus 1
                                max_size = (lookup_size.to_int() - 1).to_string()
                            endif
                            size_found = false
                        endif
                    endforeach
                endif

                directory_details += template.format(
                    directory_name,
                    size_entry,
                    scale_entry,
                    directory_context,
                    min_size_ever,
                    max_size
                )
            endforeach
        else
            message ('Directory "@0@/@1@" doesn\'t exist and won\'t be listed in the theme file.'.format (directory, size))
        endif
    endforeach
endforeach

configuration_data_object = configuration_data()
configuration_data_object.set('DIRECTORY_LIST', ','.join (directory_path_list))
configuration_data_object.set('DIRECTORY_DETAILS', '\n'.join (directory_details))

# Create the symlinks
configure_file(
    input: 'index.theme.in',
    output: '@BASENAME@',
    configuration: configuration_data_object,
    install_dir: icon_dir
)

# Create the symlinks
foreach directoy_entry : directories
    foreach scale_factor : scale_factors
        # We only create a symlink to the @1 directory, it's all the point of using SVG assets...
        if (scale_factor.to_int() > 1)
            directory = directory_entry[0]
            install_symlink(
                '@0@@@1@x'.format(directory, scale_factor),
                install_dir: icon_dir,
                pointing_to: directory,
            )
        endif
    endforeach
endforeach

subdir('apps')