xref: /dokuwiki/inc/Menu/Item/AbstractItem.php (revision 17ef2ab637c9b3af96b1d1d098d730916ae9cd37) 
1<?php
2
3namespace dokuwiki\Menu\Item;
4
5/**
6 * Class AbstractItem
7 *
8 * This class defines a single Item to be displayed in one of DokuWiki's menus. Plugins
9 * can extend those menus through action plugins and add their own instances of this class,
10 * overwriting some of its properties.
11 *
12 * Items may be shown multiple times in different contexts. Eg. for the default template
13 * all menus are shown in a Dropdown list on mobile, but are split into several places on
14 * desktop. The item's $context property can be used to hide the item depending on the current
15 * context.
16 *
17 * Children usually just need to overwrite the different properties, but for complex things
18 * the accessors may be overwritten instead.
19 */
20abstract class AbstractItem {
21
22    /** menu item is to be shown on desktop screens only */
23    const CTX_DESKTOP = 1;
24    /** menu item is to be shown on mobile screens only */
25    const CTX_MOBILE = 2;
26    /** menu item is to be shown in all contexts */
27    const CTX_ALL = 3;
28
29    protected $type        = '';
30    protected $accesskey   = '';
31    protected $id          = '';
32    protected $method      = 'get';
33    protected $params      = array();
34    protected $nofollow    = true;
35    protected $replacement = '';
36    protected $category    = 'page';
37    protected $svg         = DOKU_INC . 'lib/images/menu/00-default_checkbox-blank-circle-outline.svg';
38    protected $label       = '';
39    protected $context     = self::CTX_ALL;
40
41    public function __construct() {
42        global $ID;
43        $this->id = $ID;
44        $this->type = strtolower(substr(strrchr(get_class($this), '\\'), 1));
45        $this->params['do'] = $this->type;
46
47        if(!actionOK($this->type)) throw new \RuntimeException("action disabled: {$this->type}");
48    }
49
50    /**
51     * Return this item's label
52     *
53     * When the label property was set, it is simply returned. Otherwise, the action's type
54     * is used to look up the translation in the main language file and, if used, the replacement
55     * is applied.
56     *
57     * @return string
58     */
59    public function getLabel() {
60        if($this->label !== '') return $this->label;
61
62        /** @var array $lang */
63        global $lang;
64        $label = $lang['btn_' . $this->type];
65        if(strpos($label, '%s')) {
66            $label = sprintf($label, $this->replacement);
67        }
68        if($label === '') $label = '[' . $this->type . ']';
69        return $label;
70    }
71
72    /**
73     * Return the link this item links to
74     *
75     * Basically runs wl() on $id and $params. However if the ID is a hash it is used directly
76     * as the link
77     *
78     * @see wl()
79     * @return string
80     */
81    public function getLink() {
82        if($this->id[0] == '#') {
83            return $this->id;
84        } else {
85            return wl($this->id, $this->params);
86        }
87    }
88
89    /**
90     * Convenience method to get the attributes for constructing an <a> element
91     *
92     * @see buildAttributes()
93     * @param string|false $classprefix create a class from type with this prefix, false for no class
94     * @return array
95     */
96    public function getLinkAttributes($classprefix = 'menuitem ') {
97        $attr = array(
98            'href' => $this->getLink(),
99            'title' => $this->getLabel(),
100        );
101        if($this->isNofollow()) $attr['rel'] = 'nofollow';
102        if($this->getAccesskey()) {
103            $attr['accesskey'] = $this->getAccesskey();
104            $attr['title'] .= ' [' . $this->getAccesskey() . ']';
105        }
106        if($classprefix !== false) $attr['class'] = $classprefix . $this->getType();
107
108        return $attr;
109    }
110
111    /**
112     * Convenience method to create a full <a> element
113     *
114     * Wraps around the label and SVG image
115     *
116     * @param string|false $classprefix create a class from type with this prefix, false for no class
117     * @return string
118     */
119    public function asHtmlLink($classprefix = 'menuitem ') {
120        $attr = buildAttributes($this->getLinkAttributes($classprefix));
121        $html = "<a $attr>";
122        $html .= '<span>' . hsc($this->getLabel()) . '</span>';
123        $html .= inlinSVG($this->getSvg());
124        $html .= "</a>";
125
126        return $html;
127    }
128
129    /**
130     * Should this item be shown in the given context
131     *
132     * @param int $ctx the current context
133     * @return bool
134     */
135    public function visibleInContext($ctx) {
136        return (bool) ($ctx & $this->context);
137    }
138
139    /**
140     * @return string the name of this item
141     */
142    public function getType() {
143        return $this->type;
144    }
145
146    /**
147     * @return string
148     */
149    public function getAccesskey() {
150        return $this->accesskey;
151    }
152
153    /**
154     * @return array
155     */
156    public function getParams() {
157        return $this->params;
158    }
159
160    /**
161     * @return bool
162     */
163    public function isNofollow() {
164        return $this->nofollow;
165    }
166
167    /**
168     * @return string
169     */
170    public function getSvg() {
171        return $this->svg;
172    }
173
174}
175