layout.php

Linux嵌入式设计配套光盘,学习嵌入式设计可参考

<?php

/******************************************************************** 
 * Copyright (c) 2006, Graham P Phillips
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright 
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the following 
 *     disclaimer in the documentation and/or other materials provided 
 *     with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 ********************************************************************/


/* Compute $relPathToLaddieRoot and $scriptBase.
 * We compute these values to support PHP files being in arbitrary
 * sub-directories.  The value $relPathToLaddieRoot is the relative path from
 * the user's URL to the Laddie Root directory.  The value $scriptBase is the
 * sub-directory where the PHP files are relative to the laddie root directory.
 * For example, if the user's URL is
 * http://64.170.104.188/~graham/web/cgi-bin/howto/setup_email.php then
 * $relPathToLaddieRoot will be "../..", which is the relative path to 'web',
 * and $scriptBase will be 'cgi-bin', which gets us from 'web' to the first
 * level directory of PHP files.  
 *
 * We assume the following file structure: 
 * <LaddieRootDir>/alarmstyle.css
 * <LaddieRootDir>/cgi-bin/layout.php 
 * <LaddieRootDir>/cgi-bin/xxx.php 
 * <LaddieRootDir>/cgi-bin/subdir_xxx/xxx.php 
 * where xxx.php are other PHP files and subdir_xxx are other sub-directories.
 */

$scriptFile = $_SERVER['SCRIPT_FILENAME']; 
$scriptDir = dirname($scriptFile); 
$thisFile = __FILE__; 
$thisDir = dirname($thisFile);
$scriptBase = basename($thisDir);  /* typically 'cgi-bin' */
$laddieRoot = dirname($thisDir);
$relPathToLaddieRoot = calc_delta_dir($scriptDir, $laddieRoot);

/* To create a new page in the menu system: 
 *   a) Modify the following data structure.
 *      The data structure is an array of arrays.
 *      The top-level array is the 1st level menu,
 *      and the second-level arrays are the 2nd level menus
 *      corresponding to each 1st level menu.
 *   b) Add a new php page, eg, setup_wizard.php.
 *   c) Modify the php page to call display_page()
 *      with the key of the 1st level menu, eg 'Setup'
 *      and the key of the 2nd level menu, eg 'Wizard'. 
 *      See setup_wizard.php for an example.
 */

$menu_system = array(
  'Setup' => array(
    'Network' => "$relPathToLaddieRoot/$scriptBase/setup_network.php", 
    'SNMP' => "$relPathToLaddieRoot/$scriptBase/setup_snmp.php",
    'Alarm' => "$relPathToLaddieRoot/$scriptBase/setup_alarm.php"),

  'Status' => array(
    'Zone Status' => "$relPathToLaddieRoot/$scriptBase/status.php"),

  'Reports' => array(
    'View Logs' => "$relPathToLaddieRoot/$scriptBase/reports_logs.php"),

  'Table Editor' => array(
    'daemons' => "$relPathToLaddieRoot/../rta/rta_apps.html"),

  'Help' => array(
    'HowTo' => "$relPathToLaddieRoot/$scriptBase/help_howto.php",
    'WhatIf' => "$relPathToLaddieRoot/$scriptBase/help_whatif.php",
    'Contact Us' => "$relPathToLaddieRoot/$scriptBase/help_contact_us.php")
  );

function display_menu1($menu_item) {
  global $menu_system;

  $num = count($menu_system);
  foreach ($menu_system as $menu_key => $menu_array) {
      if ($menu_key == $menu_item) 
          $display_str = "<strong>" . $menu_key . "</strong>"; 
      else
          $display_str = $menu_key; 
      reset($menu_array); 
      $url = current($menu_array); 
      print "<a href=\"" . $url . "\">" . $display_str . "</a>";
      if ($num > 1)
          print " | ";
      $num--;
  }
  print "\n";
}

function display_menu2($menu1_item, $menu2_item) {
  global $menu_system;

  if (!array_key_exists($menu1_item, $menu_system)) {
     print "        Programming error\n";
     return;
  }
  $layout_menu = $menu_system[$menu1_item]; 

  print "        <td class=\"menu2\" style=\"width: 10%\"> \n";
  print "          <ul>\n";
  foreach ($layout_menu as $menu_key => $menu_url) {
    if ($menu_key == $menu2_item) 
          $display_str = "<strong>" . $menu_key . "</strong>"; 
      else
          $display_str = $menu_key; 
    print "            <li> <a href=\"" . $menu_url . "\">" . $display_str . "</a> </li>\n";
  }
  print "          </ul>\n";
  print "        </td>\n";
  return;
}


function display_page($menu1_item, $menu2_item, $widget, 
	$javascript_head="", $javascript_onload="") { 

  global $relPathToLaddieRoot; 

  print <<< LAYOUT_PART1
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">

LAYOUT_PART1;

  $styleSheet = "$relPathToLaddieRoot/alarmstyle.css"; 

  print "<head> <link rel=\"stylesheet\" type=\"text/css\" href=\"$styleSheet\">\n<title>Laddie Alarm System</title>\n<meta http-equiv=\"Pragma\" content=\"no-cache\"> <meta http-equiv=\"Expires\" content=\"-1\">\n$javascript_head </head>\n";

  print "<body $javascript_onload><h1>Laddie Alarm System</h1><table id=\"menu1\">\n";

  print "      <tr class=\"menu1\">\n";
  print "        <td colspan=\"2\">\n";
  display_menu1($menu1_item);
  print "        </td>\n";
  print "      </tr>\n"; 
  print "      <tr>\n";

  display_menu2($menu1_item, $menu2_item);

  print "        <td>\n";
  print $widget;
  print "        </td>\n";
  print "      </tr>\n";

  print <<< LAYOUT_PART2
    </table>
  </body>
</html>

LAYOUT_PART2;
}


function display_error_msg($menu1_item, $menu2_item, $error) {

  $widget = "<h2>Error</h2>";
  foreach ($error as $msg) {
      $widget .= "$msg <br>\n";
  }
  display_page($menu1_item, $menu2_item, $widget);
}

function calc_delta_dir($fromDir, $toDir) {
  $len = min(strlen($fromDir),strlen($toDir));
  $ii = 0;
  while ($ii < $len && $fromDir[$ii] == $toDir[$ii]) {
    $ii++;
  }
  $la = trim(substr($fromDir,$ii),'/');
  $lb = trim(substr($toDir,$ii),'/');
  $ca = substr_count($la,'/');
  $cb = substr_count($lb,'/');
  if (empty($la) && empty($lb))
    return "";
  $path = "..";
  for ($ii = $ca; $ii > 0; $ii--) {
    $path .= "/..";
  }
  if (!empty($lb)) {
    $path .= "/" . $lb; 
  }
  return $path;
}

?>