blocks/edit_form.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * Defines the base class form used by blocks/edit.php to edit block instance configuration.
  20  *
  21  * It works with the {@link block_edit_form} class, or rather the particular
  22  * subclass defined by this block, to do the editing.
  23  *
  24  * @package    core
  25  * @subpackage block
  26  * @copyright  2009 Tim Hunt
  27  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  28  */
  29
  30 if (!defined('MOODLE_INTERNAL')) {
  31     die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
  32 }
  33
  34 require_once($CFG->libdir . '/formslib.php');
  35 require_once($CFG->libdir . '/blocklib.php');
  36
  37 /**
  38  * The base class form used by blocks/edit.php to edit block instance configuration.
  39  *
  40  * @copyright 2009 Tim Hunt
  41  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  42  */
  43 class block_edit_form extends moodleform {
  44     /**
  45      * The block instance we are editing.
  46      * @var block_base
  47      */
  48     public $block;
  49     /**
  50      * The page we are editing this block in association with.
  51      * @var moodle_page
  52      */
  53     public $page;
  54
  55     function __construct($actionurl, $block, $page) {
  56         global $CFG;
  57         $this->block = $block;
  58         $this->page = $page;
  59         parent::moodleform($actionurl);
  60     }
  61
  62     function definition() {
  63         $mform =& $this->_form;
  64
  65         // First show fields specific to this type of block.
  66         $this->specific_definition($mform);
  67
  68         // Then show the fields about where this block appears.
  69         $mform->addElement('header', 'whereheader', get_string('wherethisblockappears', 'block'));
  70
  71         // If the current weight of the block is out-of-range, add that option in.
  72         $blockweight = $this->block->instance->weight;
  73         $weightoptions = array();
  74         if ($blockweight < -block_manager::MAX_WEIGHT) {
  75             $weightoptions[$blockweight] = $blockweight;
  76         }
  77         for ($i = -block_manager::MAX_WEIGHT; $i <= block_manager::MAX_WEIGHT; $i++) {
  78             $weightoptions[$i] = $i;
  79         }
  80         if ($blockweight > block_manager::MAX_WEIGHT) {
  81             $weightoptions[$blockweight] = $blockweight;
  82         }
  83         $first = reset($weightoptions);
  84         $weightoptions[$first] = get_string('bracketfirst', 'block', $first);
  85         $last = end($weightoptions);
  86         $weightoptions[$last] = get_string('bracketlast', 'block', $last);
  87
  88         $regionoptions = $this->page->theme->get_all_block_regions();
  89
  90         $parentcontext = context::instance_by_id($this->block->instance->parentcontextid);
  91         $mform->addElement('hidden', 'bui_parentcontextid', $parentcontext->id);
  92
  93         $mform->addElement('static', 'bui_homecontext', get_string('createdat', 'block'), print_context_name($parentcontext));
  94         $mform->addHelpButton('bui_homecontext', 'createdat', 'block');
  95
  96         // For pre-calculated (fixed) pagetype lists
  97         $pagetypelist = array();
  98
  99         // parse pagetype patterns
 100         $bits = explode('-', $this->page->pagetype);
 101
 102         // First of all, check if we are editing blocks @ front-page or no and
 103         // make some dark magic if so (MDL-30340) because each page context
 104         // implies one (and only one) harcoded page-type that will be set later
 105         // when processing the form data at {@link block_manager::process_url_edit()}
 106
 107         // There are some conditions to check related to contexts
 108         $ctxconditions = $this->page->context->contextlevel == CONTEXT_COURSE &&
 109                          $this->page->context->instanceid == get_site()->id;
 110         // And also some pagetype conditions
 111         $pageconditions = isset($bits[0]) && isset($bits[1]) && $bits[0] == 'site' && $bits[1] == 'index';
 112         // So now we can be 100% sure if edition is happening at frontpage
 113         $editingatfrontpage = $ctxconditions && $pageconditions;
 114
 115         // Let the form to know about that, can be useful later
 116         $mform->addElement('hidden', 'bui_editingatfrontpage', (int)$editingatfrontpage);
 117
 118         // Front page, show the page-contexts element and set $pagetypelist to 'any page' (*)
 119         // as unique option. Processign the form will do any change if needed
 120         if ($editingatfrontpage) {
 121             $contextoptions = array();
 122             $contextoptions[BUI_CONTEXTS_FRONTPAGE_ONLY] = get_string('showonfrontpageonly', 'block');
 123             $contextoptions[BUI_CONTEXTS_FRONTPAGE_SUBS] = get_string('showonfrontpageandsubs', 'block');
 124             $contextoptions[BUI_CONTEXTS_ENTIRE_SITE]    = get_string('showonentiresite', 'block');
 125             $mform->addElement('select', 'bui_contexts', get_string('contexts', 'block'), $contextoptions);
 126             $mform->addHelpButton('bui_contexts', 'contexts', 'block');
 127             $pagetypelist['*'] = '*'; // This is not going to be shown ever, it's an unique option
 128
 129         // Any other system context block, hide the page-contexts element,
 130         // it's always system-wide BUI_CONTEXTS_ENTIRE_SITE
 131         } else if ($parentcontext->contextlevel == CONTEXT_SYSTEM) {
 132             $mform->addElement('hidden', 'bui_contexts', BUI_CONTEXTS_ENTIRE_SITE);
 133
 134         } else if ($parentcontext->contextlevel == CONTEXT_COURSE) {
 135             // 0 means display on current context only, not child contexts
 136             // but if course managers select mod-* as pagetype patterns, block system will overwrite this option
 137             // to 1 (display on current context and child contexts)
 138             $mform->addElement('hidden', 'bui_contexts', BUI_CONTEXTS_CURRENT);
 139         } else if ($parentcontext->contextlevel == CONTEXT_MODULE or $parentcontext->contextlevel == CONTEXT_USER) {
 140             // module context doesn't have child contexts, so display in current context only
 141             $mform->addElement('hidden', 'bui_contexts', BUI_CONTEXTS_CURRENT);
 142         } else {
 143             $parentcontextname = print_context_name($parentcontext);
 144             $contextoptions[BUI_CONTEXTS_CURRENT]      = get_string('showoncontextonly', 'block', $parentcontextname);
 145             $contextoptions[BUI_CONTEXTS_CURRENT_SUBS] = get_string('showoncontextandsubs', 'block', $parentcontextname);
 146             $mform->addElement('select', 'bui_contexts', get_string('contexts', 'block'), $contextoptions);
 147         }
 148
 149         // Generate pagetype patterns by callbacks if necessary (has not been set specifically)
 150         if (empty($pagetypelist)) {
 151             $pagetypelist = generate_page_type_patterns($this->page->pagetype, $parentcontext, $this->page->context);
 152             $displaypagetypewarning = false;
 153             if (!array_key_exists($this->block->instance->pagetypepattern, $pagetypelist)) {
 154                 // Pushing block's existing page type pattern
 155                 $pagetypestringname = 'page-'.str_replace('*', 'x', $this->block->instance->pagetypepattern);
 156                 if (get_string_manager()->string_exists($pagetypestringname, 'pagetype')) {
 157                     $pagetypelist[$this->block->instance->pagetypepattern] = get_string($pagetypestringname, 'pagetype');
 158                 } else {
 159                     //as a last resort we could put the page type pattern in the select box
 160                     //however this causes mod-data-view to be added if the only option available is mod-data-*
 161                     // so we are just showing a warning to users about their prev setting being reset
 162                     $displaypagetypewarning = true;
 163                 }
 164             }
 165         }
 166
 167         // hide page type pattern select box if there is only one choice
 168         if (count($pagetypelist) > 1) {
 169             if ($displaypagetypewarning) {
 170                 $mform->addElement('static', 'pagetypewarning', '', get_string('pagetypewarning','block'));
 171             }
 172
 173             $mform->addElement('select', 'bui_pagetypepattern', get_string('restrictpagetypes', 'block'), $pagetypelist);
 174         } else {
 175             $values = array_keys($pagetypelist);
 176             $value = array_pop($values);
 177             $mform->addElement('hidden', 'bui_pagetypepattern', $value);
 178             // Now we are really hiding a lot (both page-contexts and page-type-patterns),
 179             // specially in some systemcontext pages having only one option (my/user...)
 180             // so, until it's decided if we are going to add the 'bring-back' pattern to
 181             // all those pages or no (see MDL-30574), we are going to show the unique
 182             // element statically
 183             // TODO: Revisit this once MDL-30574 has been decided and implemented, although
 184             // perhaps it's not bad to always show this statically when only one pattern is
 185             // available.
 186             if (!$editingatfrontpage) {
 187                 // Try to beautify it
 188                 $strvalue = $value;
 189                 $strkey = 'page-'.str_replace('*', 'x', $strvalue);
 190                 if (get_string_manager()->string_exists($strkey, 'pagetype')) {
 191                     $strvalue = get_string($strkey, 'pagetype');
 192                 }
 193                 // Show as static (hidden has been set already)
 194                 $mform->addElement('static', 'bui_staticpagetypepattern',
 195                     get_string('restrictpagetypes','block'), $strvalue);
 196             }
 197         }
 198
 199         if ($this->page->subpage) {
 200             if ($parentcontext->contextlevel == CONTEXT_USER) {
 201                 $mform->addElement('hidden', 'bui_subpagepattern', '%@NULL@%');
 202             } else {
 203                 $subpageoptions = array(
 204                     '%@NULL@%' => get_string('anypagematchingtheabove', 'block'),
 205                     $this->page->subpage => get_string('thisspecificpage', 'block', $this->page->subpage),
 206                 );
 207                 $mform->addElement('select', 'bui_subpagepattern', get_string('subpages', 'block'), $subpageoptions);
 208             }
 209         }
 210
 211         $defaultregionoptions = $regionoptions;
 212         $defaultregion = $this->block->instance->defaultregion;
 213         if (!array_key_exists($defaultregion, $defaultregionoptions)) {
 214             $defaultregionoptions[$defaultregion] = $defaultregion;
 215         }
 216         $mform->addElement('select', 'bui_defaultregion', get_string('defaultregion', 'block'), $defaultregionoptions);
 217         $mform->addHelpButton('bui_defaultregion', 'defaultregion', 'block');
 218
 219         $mform->addElement('select', 'bui_defaultweight', get_string('defaultweight', 'block'), $weightoptions);
 220         $mform->addHelpButton('bui_defaultweight', 'defaultweight', 'block');
 221
 222         // Where this block is positioned on this page.
 223         $mform->addElement('header', 'onthispage', get_string('onthispage', 'block'));
 224
 225         $mform->addElement('selectyesno', 'bui_visible', get_string('visible', 'block'));
 226
 227         $blockregion = $this->block->instance->region;
 228         if (!array_key_exists($blockregion, $regionoptions)) {
 229             $regionoptions[$blockregion] = $blockregion;
 230         }
 231         $mform->addElement('select', 'bui_region', get_string('region', 'block'), $regionoptions);
 232
 233         $mform->addElement('select', 'bui_weight', get_string('weight', 'block'), $weightoptions);
 234
 235         $pagefields = array('bui_visible', 'bui_region', 'bui_weight');
 236         if (!$this->block->user_can_edit()) {
 237             $mform->hardFreezeAllVisibleExcept($pagefields);
 238         }
 239         if (!$this->page->user_can_edit_blocks()) {
 240             $mform->hardFreeze($pagefields);
 241         }
 242
 243         $this->add_action_buttons();
 244     }
 245
 246     function set_data($defaults) {
 247         // Prefix bui_ on all the core field names.
 248         $blockfields = array('showinsubcontexts', 'pagetypepattern', 'subpagepattern', 'parentcontextid',
 249                 'defaultregion', 'defaultweight', 'visible', 'region', 'weight');
 250         foreach ($blockfields as $field) {
 251             $newname = 'bui_' . $field;
 252             $defaults->$newname = $defaults->$field;
 253         }
 254
 255         // Copy block config into config_ fields.
 256         if (!empty($this->block->config)) {
 257             foreach ($this->block->config as $field => $value) {
 258                 $configfield = 'config_' . $field;
 259                 $defaults->$configfield = $value;
 260             }
 261         }
 262
 263         // Munge ->subpagepattern becuase HTML selects don't play nicely with NULLs.
 264         if (empty($defaults->bui_subpagepattern)) {
 265             $defaults->bui_subpagepattern = '%@NULL@%';
 266         }
 267
 268         $systemcontext = context_system::instance();
 269         if ($defaults->parentcontextid == $systemcontext->id) {
 270             $defaults->bui_contexts = BUI_CONTEXTS_ENTIRE_SITE; // System-wide and sticky
 271         } else {
 272             $defaults->bui_contexts = $defaults->bui_showinsubcontexts;
 273         }
 274
 275         parent::set_data($defaults);
 276     }
 277
 278     /**
 279      * Override this to create any form fields specific to this type of block.
 280      * @param object $mform the form being built.
 281      */
 282     protected function specific_definition($mform) {
 283         // By default, do nothing.
 284     }
 285 }