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<?php
/*
Written by Chris Jean for iThemes.com
Version 1.7.0
Version History
1.5.0 - 2012-12-07 - Chris Jean
Added support for builder-disable-stylesheet-cache theme support.
Added another error handler for when cached file generation fails.
1.6.0 - 2012-12-14 - Chris Jean
Improved generation of the stylesheet version value to make it more clear on what is supported.
1.6.1 - 2013-05-21 - Chris Jean
Removed assign by reference.
1.7.0 - 2013-10-24 - Chris Jean
Updated generator_version to 7 to account for styling fix in layout-engine.php version 5.7.2.
*/
class IT_Builder_Layout_Style_Generator {
var $path = 'it-file-cache/builder-layouts';
var $generator_version = 7;
function IT_Builder_Layout_Style_Generator() {
add_action( 'builder_add_stylesheets', array( $this, 'add_stylesheet' ), 0, 101 );
add_action( 'wp_head', array( $this, 'add_stylesheet' ), 0, -100 );
add_action( 'builder_layout_engine_identified_layout', array( $this, 'layout_identified' ), 0, 2 );
add_action( 'builder_generate_layout_stylesheet', array( $this, 'generate_stylesheet' ) );
if ( ! empty( $_REQUEST['builder_debug'] ) )
add_action( 'builder_print_render_comments', array( $this, 'add_print_render_comments' ) );
}
function layout_identified( $layout_id, $layout_settings ) {
$this->layout_id = $layout_id;
$this->layout_settings =& $layout_settings;
$this->layout =& $layout_settings['layouts'][$layout_id];
}
function update_layout_storage() {
if ( empty( $this->layout_settings ) )
return;
$storage = new ITStorage( 'layout_settings' );
$storage->save( $this->layout_settings );
}
function add_print_render_comments() {
echo "\n";
echo "\tStylesheet Type: {$this->stylesheet_type}\n";
echo "\tStylesheet Version: {$this->stylesheet_version}\n";
}
function generate_stylesheet( $layout_id, $layout_settings ) {
it_classes_load( 'it-file-utility.php' );
require_once( dirname( __FILE__ ) . '/layout-engine.php' );
$this->stylesheet = apply_filters( 'builder_get_layout_style_rules', '', $layout_id, $layout_settings );
$file = "{$this->path}/$layout_id.css";
$file = ITFileUtility::get_writable_file( $file );
if ( is_wp_error( $file ) || ( false === file_put_contents( $file, $this->stylesheet ) ) )
return;
$this->layout['stylesheet_version'] = $this->get_current_stylesheet_version();
$this->layout['stylesheet_file'] = $file;
$this->layout_settings['layouts'][$this->layout_id] = $this->layout;
$this->update_layout_storage();
}
function add_stylesheet() {
if ( empty( $this->layout ) )
return;
remove_action( 'wp_head', array( $this, 'add_stylesheet' ), 0, -100 );
$current_stylesheet_version = $this->get_current_stylesheet_version();
$this->stylesheet_version = $current_stylesheet_version;
if ( ! isset( $this->layout['stylesheet_version'] ) )
$this->layout['stylesheet_version'] = '';
if ( builder_theme_supports( 'builder-disable-stylesheet-cache' ) ) {
$this->stylesheet_type = 'disabled-cache';
$this->layout['stylesheet_file'] = '';
}
else {
if ( ( $current_stylesheet_version != (string) $this->layout['stylesheet_version'] ) || ! empty( $_GET['builder_force_regenerate_stylesheet'] ) ) {
$this->stylesheet_type = 'regenerated';
$this->generate_stylesheet( $this->layout_id, $this->layout_settings );
}
else {
$this->stylesheet_type = 'cached';
}
if ( ! empty( $this->layout['stylesheet_file'] ) ) {
if ( is_string( $this->layout['stylesheet_file'] ) && file_exists( $this->layout['stylesheet_file'] ) ) {
$url = ITUtility::get_url_from_file( $this->layout['stylesheet_file'] );
}
else if ( is_wp_error( $this->layout['stylesheet_file'] ) ) {
echo "\n<!--\n\t" . __( 'Builder Error: Unable to find a writable location to store the generated stylesheet. Check directory permissions in the wp-content/uploads directory.', 'it-l10n-Builder' ) . "\n";
echo "\t" . sprintf( __( 'Error Message (%s): %s', 'it-l10n-Builder' ), $this->layout['stylesheet_file']->get_error_code(), $this->layout['stylesheet_file']->get_error_message() ) . "\n";
echo "-->\n";
}
}
if ( ! empty( $url ) ) {
$version = md5( $current_stylesheet_version );
echo "<link rel=\"stylesheet\" href=\"$url?version=$version\" type=\"text/css\" media=\"screen\" />\n";
return;
}
}
if ( empty( $this->stylesheet ) )
$this->generate_stylesheet( $this->layout_id, $this->layout_settings );
if ( empty( $this->stylesheet_type ) )
$this->stylesheet_type = 'fallback';
echo "<style type=\"text/css\" media=\"screen\">\n{$this->stylesheet}</style>\n";
}
function get_current_stylesheet_version() {
$version = $this->generator_version;
if ( empty( $this->layout['version'] ) )
$version .= ',1';
else
$version .= ',' . $this->layout['version'];
$version .= ',' . get_stylesheet();
if ( builder_theme_supports( 'builder-full-width-modules-legacy' ) && ! isset( $GLOBALS['builder_theme_supports_defaults']['builder-full-width-modules-legacy'] ) )
$GLOBALS['builder_theme_supports_defaults']['builder-full-width-modules-legacy'] = false;
foreach ( $GLOBALS['builder_theme_supports_defaults'] as $feature => $args ) {
$support = builder_theme_supports( $feature );
if ( ! $support )
continue;
$version .= ',{' . $feature . ':';
$data = array();
if ( ! empty( $args ) && $support ) {
foreach ( $args as $arg => $value ) {
$arg_support = builder_theme_supports( $feature, $arg );
if ( $arg_support )
$data[] = $arg . '=' . (string) $arg_support;
}
}
else {
$data[] = (string) $support;
}
$version .= implode( ',', $data );
$version .= '}';
}
$modules = array();
foreach ( $this->layout['modules'] as $module )
$modules[] = $module['guid'];
$version .= ',{modules:' . implode( ',', $modules ) . '}';
$version = apply_filters( 'builder_get_layout_stylesheet_version', $version );
return $version;
}
}
new IT_Builder_Layout_Style_Generator();