MenuSet.php

<?php
require_once("AWLUtilities.php");
 
class MenuOption {
  var $label;
 
  var $target;
 
  var $title;
 
  var $active;
 
  var $sortkey;
 
  var $style;
 
  var $submenu_set;
  var $attributes;
 
  var $self;
 
  var $rendered;
  function __construct( $label, $target, $title="", $style="menu", $sortkey=1000 ) {
    $this->label  = $label;
    $this->target = $target;
    $this->title  = $title;
    $this->style  = $style;
    $this->attributes = array();
    $this->active = false;
    $this->sortkey = $sortkey;
 
    $this->rendered = "";
    $this->self  =& $this;
  }
 
  function Render( ) {
    $r = sprintf('<a href="%s" class="%s" title="%s"%s>%s</a>',
            $this->target, $this->style, htmlspecialchars($this->title), "%%attributes%%",
            htmlspecialchars($this->label), $this->style );
 
    // Now process the generic attributes
    $attribute_values = "";
    foreach( $this->attributes AS $k => $v ) {
      if ( substr($k, 0, 1) == '_' ) continue;
      $attribute_values .= ' '.$k.'="'.htmlspecialchars($v).'"';
    }
    $r = str_replace( '%%attributes%%', $attribute_values, $r );
 
    $this->rendered = $r;
    return "$r";
  }
 
  function Set( $attribute, $value ) {
    $this->attributes[$attribute] = $value;
  }
 
  function Active( $style=false ) {
    $this->active = true;
    if ( $style ) $this->style = $style;
  }
 
  function AddSubmenu( &$submenu_set ) {
    $this->submenu_set = &$submenu_set;
  }
 
  function IsActive( ) {
    return ( $this->active );
  }
 
  function MaybeActive( $test_pattern, $active_style ) {
    if ( is_string($test_pattern) && preg_match($test_pattern,$_SERVER['REQUEST_URI']) ) {
      $this->Active($active_style);
    }
    return ( $this->active );
  }
}
 
 
function _CompareMenuSequence( $a, $b ) {
  dbg_error_log("MenuSet", ":_CompareMenuSequence: Comparing %d with %d", $a->sortkey, $b->sortkey);
  return ($a->sortkey - $b->sortkey);
}
 
 
 
class MenuSet {
  var $div_id;
 
  var $main_class;
 
  var $active_class;
 
  var $options;
 
  var $parent;
 
  var $last_sortkey;
 
  var $has_active_options;
  function __construct( $div_id, $main_class = '', $active_class = 'active' ) {
    $this->options = array();
    $this->main_class = $main_class;
    $this->active_class = $active_class;
    $this->div_id = $div_id;
  }
 
  function &AddOption( $label, $target, $title="", $active=false, $sortkey=null, $external=false ) {
    if ( !isset($sortkey) ) {
      $sortkey = (isset($this->last_sortkey) ? $this->last_sortkey + 100 : 1000);
    }
    $this->last_sortkey = $sortkey;
    if ( version_compare(phpversion(), '5.0') < 0) {
      $new_option = new MenuOption( $label, $target, $title, $this->main_class, $sortkey );
    }
    else {
      $new_option = new MenuOption( $label, $target, $title, $this->main_class, $sortkey );
    }
    if ( ($old_option = $this->_OptionExists( $label )) === false ) {
      $this->options[] = &$new_option ;
    }
    else {
      dbg_error_log("MenuSet",":AddOption: Replacing existing option # $old_option ($label)");
      $this->options[$old_option] = &$new_option;  // Overwrite the existing option
    }
    if ( is_bool($active) && $active == false && $_SERVER['REQUEST_URI'] == $target ) {
      // If $active is not set, then we look for an exact match to the current URL
      $new_option->Active( $this->active_class );
    }
    else if ( is_bool($active) && $active ) {
      // When active is specified as a boolean, the recognition has been done externally
      $new_option->Active( $this->active_class );
    }
    else if ( is_string($active) && preg_match($active,$_SERVER['REQUEST_URI']) ) {
      // If $active is a string, then we match the current URL to that as a Perl regex
      $new_option->Active( $this->active_class );
    }
 
    if ( $external == true ) $new_option->Set('target', '_blank');
 
    return $new_option ;
  }
 
  function &AddSubMenu( &$submenu_set, $label, $target, $title="", $active=false, $sortkey=2000 ) {
    $new_option =& $this->AddOption( $label, $target, $title, $active, $sortkey );
    $submenu_set->parent = &$new_option ;
    $new_option->AddSubmenu( $submenu_set );
    return $new_option ;
  }
 
  function _HasActive( ) {
    if ( isset($this->has_active_options) ) {
      return $this->has_active_options;
    }
    foreach( $this->options AS $k => $v ) {
      if ( $v->IsActive() ) {
        $rc = true;
        return $rc;
      }
    }
    $rc = false;
    return $rc;
  }
 
  function Size( ) {
    return count($this->options);
  }
 
  function _OptionExists( $newlabel ) {
    $rc = false;
    foreach( $this->options AS $k => $v ) {
      if ( $newlabel == $v->label ) return $k;
    }
    return $rc;
  }
 
  function LinkActiveSubMenus( ) {
    $this->has_active_options = false;
    foreach( $this->options AS $k => $v ) {
      if ( isset($v->submenu_set) && $v->submenu_set->_HasActive() ) {
        // Note that we need to do it this way, since $v is a copy, not a reference
        $this->options[$k]->Active( $this->active_class );
        $this->has_active_options = true;
      }
    }
  }
 
  function MakeSomethingActive( $test_pattern ) {
    if ( $this->has_active_options ) return;  // Already true.
    foreach( $this->options AS $k => $v ) {
      if ( isset($v->submenu_set) && $v->submenu_set->_HasActive() ) {
        // Note that we need to do it this way, since $v is a copy, not a reference
        $this->options[$k]->Active( $this->active_class );
        $this->has_active_options = true;
        return $this->has_active_options;
      }
    }
 
    foreach( $this->options AS $k => $v ) {
      if ( isset($v->submenu_set) && $v->submenu_set->MakeSomethingActive($test_pattern) ) {
        // Note that we need to do it this way, since $v is a copy, not a reference
        $this->options[$k]->Active( $this->active_class );
        $this->has_active_options = true;
        return $this->has_active_options;
      }
      else {
        if ( $this->options[$k]->MaybeActive( $test_pattern, $this->active_class ) ) {
          $this->has_active_options = true;
          return $this->has_active_options;
        }
      }
    }
    return false;
  }
 
  function _CompareSequence( $a, $b ) {
    dbg_error_log("MenuSet",":_CompareSequence: Comparing %d with %d", $a->sortkey, $b->sortkey);
    return ($a->sortkey - $b->sortkey);
  }
 
 
  function Render( $submenus_inline = false ) {
    if ( !isset($this->has_active_options) ) {
      $this->LinkActiveSubMenus();
    }
    $options = $this->options;
    usort($options,"_CompareMenuSequence");
    $render_sub_menus = false;
    $r = "<div id=\"$this->div_id\">\n";
    foreach( $options AS $k => $v ) {
      $r .= $v->Render();
      if ( $v->IsActive() && isset($v->submenu_set) && $v->submenu_set->Size() > 0 ) {
        $render_sub_menus = $v->submenu_set;
        if ( $submenus_inline )
          $r .= $render_sub_menus->Render();
      }
    }
    $r .="</div>\n";
    if ( !$submenus_inline && $render_sub_menus != false ) {
      $r .= $render_sub_menus->Render();
    }
    return $r;
  }
 
 
  function RenderAsCSS( $depth = 0, $skip_empty = true ) {
    $this->LinkActiveSubMenus();
 
    if ( $depth > 0 )
      $class = "submenu" . $depth;
    else
      $class = "menu";
 
    $options = $this->options;
    usort($options,"_CompareMenuSequence");
 
    $r = "<div id=\"$this->div_id\" class=\"$class\">\n<ul>\n";
    foreach( $options AS $k => $v ) {
      if ( $skip_empty && isset($v->submenu_set) && $v->submenu_set->Size() < 1 ) continue;
      $r .= "<li>".$v->Render();
      if ( isset($v->submenu_set) && $v->submenu_set->Size() > 0 ) {
        $r .= $v->submenu_set->RenderAsCSS($depth+1);
      }
      $r .= "</li>\n";
    }
    $r .="</ul></div>\n";
    return $r;
  }
}