21196676401

Committed 21 Jan 2026 03:57AM UTC coverage: 87.156%. Remained the same

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added types tests

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/src/ComponentModel/Component.php

<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\ComponentModel;

use Nette;
use function func_num_args, in_array, substr;


/**
 * Base class for all components. Components have a parent, name, and can be monitored by ancestors.
 *
 * @property-read string $name
 * @property-read ?IContainer $parent
 */
abstract class Component implements IComponent
{
        use Nette\SmartObject;

        private ?IContainer $parent = null;
        private ?string $name = null;

        /**
         * Monitors: tracks monitored ancestors and registered callbacks.
         * Combines cached lookup results with callback registrations for each monitored type.
         * Depth is used to detect when monitored ancestor becomes unreachable during detachment.
         * Structure: [type => [found object, depth to object, path to object, [[attached, detached], ...]]]
         * @var array<''|class-string<Nette\ComponentModel\IComponent>, array{?IComponent, ?int, ?string, array<int, array{?\Closure, ?\Closure}>}>
         */
        private array $monitors = [];

        /** Prevents nested listener execution during refreshMonitors */
        private bool $callingListeners = false;


        /**
         * Finds the closest ancestor of specified type.
         * @template T of IComponent
         * @param ?class-string<T>  $type
         * @param bool  $throw  throw exception if component doesn't exist?
         * @return ($type is null ? ($throw is true ? IComponent : ?IComponent) : ($throw is true ? T : ?T))
         */
        final public function lookup(?string $type, bool $throw = true): ?IComponent
        {
                $type ??= '';
                if (!isset($this->monitors[$type])) { // not monitored or not processed yet
                        $ancestor = $this->parent;
                        $path = self::NameSeparator . $this->name;
                        $depth = 1;
                        while ($ancestor !== null) {
                                $parent = $ancestor->getParent();
                                if ($type ? $ancestor instanceof $type : $parent === null) {
                                        break;
                                }

                                $path = self::NameSeparator . $ancestor->getName() . $path;
                                $depth++;
                                $ancestor = $parent; // IComponent::getParent()
                                if ($ancestor === $this) {
                                        $ancestor = null; // prevent cycling
                                }
                        }

                        $this->monitors[$type] = $ancestor
                                ? [$ancestor, $depth, substr($path, 1), []]
                                : [null, null, null, []]; // not found
                }

                if ($throw && $this->monitors[$type][0] === null) {
                        $desc = $this->name === null ? "type of '" . static::class . "'" : "'$this->name'";
                        throw new Nette\InvalidStateException("Component $desc is not attached to '$type'.");
                }

                return $this->monitors[$type][0];
        }


        /**
         * Finds the closest ancestor specified by class or interface name and returns backtrace path.
         * A path is the concatenation of component names separated by self::NameSeparator.
         * @param ?class-string<IComponent>  $type
         * @param bool  $throw  throw exception if component doesn't exist?
         * @return ($throw is true ? string : ?string)
         */
        final public function lookupPath(?string $type = null, bool $throw = true): ?string
        {
                $this->lookup($type, $throw);
                return $this->monitors[$type ?? ''][2];
        }


        /**
         * Starts monitoring ancestors for attach/detach events.
         * @template T of IComponent
         * @param class-string<T>  $type
         * @param ?(callable(T): void)  $attached  called when attached to a monitored ancestor
         * @param ?(callable(T): void)  $detached  called before detaching from a monitored ancestor
         */
        final public function monitor(string $type, ?callable $attached = null, ?callable $detached = null): void
        {
                if (func_num_args() === 1) {
                        $attached = $this->attached(...);
                        $detached = $this->detached(...);
                } else {
                        $attached = $attached ? $attached(...) : null;
                        $detached = $detached ? $detached(...) : null;
                }

                if (
                        $attached
                        && ($ancestor = $this->lookup($type, throw: false))
                        && !in_array([$attached, $detached], $this->monitors[$type][3], strict: false)
                ) {
                        $attached($ancestor);
                }

                $this->monitors[$type][3][] = [$attached, $detached]; // mark as monitored
        }


        /**
         * Stops monitoring ancestors of specified type.
         * @param class-string<IComponent>  $type
         */
        final public function unmonitor(string $type): void
        {
                unset($this->monitors[$type]);
        }


        /**
         * This method will be called when the component (or component's parent)
         * becomes attached to a monitored object. Do not call this method yourself.
         * @deprecated  use monitor($type, $attached)
         */
        protected function attached(IComponent $obj): void
        {
        }


        /**
         * This method will be called before the component (or component's parent)
         * becomes detached from a monitored object. Do not call this method yourself.
         * @deprecated  use monitor($type, null, $detached)
         */
        protected function detached(IComponent $obj): void
        {
        }


        /********************* interface IComponent ****************d*g**/


        final public function getName(): ?string
        {
                return $this->name;
        }


        /**
         * Returns the parent container if any.
         */
        final public function getParent(): ?IContainer
        {
                return $this->parent;
        }


        /**
         * Sets or removes the parent of this component. This method is managed by containers and should
         * not be called by applications
         * @throws Nette\InvalidStateException
         * @internal
         */
        public function setParent(?IContainer $parent, ?string $name = null): static
        {
                if ($parent === null && $this->parent === null && $name !== null) {
                        $this->name = $name; // just rename
                        return $this;

                } elseif ($parent === $this->parent && $name === null) {
                        return $this; // nothing to do
                }

                // A component cannot be given a parent if it already has a parent.
                if ($this->parent !== null && $parent !== null) {
                        throw new Nette\InvalidStateException("Component '$this->name' already has a parent.");
                }

                // remove from parent
                if ($parent === null) {
                        $this->refreshMonitors(0);
                        $this->parent = null;

                } else { // add to parent
                        $this->validateParent($parent);
                        $this->parent = $parent;
                        if ($name !== null) {
                                $this->name = $name;
                        }

                        $tmp = [];
                        $this->refreshMonitors(0, $tmp);
                }

                return $this;
        }


        /**
         * Validates the new parent before it's set.
         * Descendant classes can override this to implement custom validation logic.
         * @throws Nette\InvalidStateException
         */
        protected function validateParent(IContainer $parent): void
        {
        }


        /**
         * Refreshes monitors.
         * @param  ?array<string, true>  $missing  (array = attaching, null = detaching)
         * @param  array<int, array{?\Closure, IComponent}>  $listeners
         */
        private function refreshMonitors(int $depth, ?array &$missing = null, array &$listeners = []): void
        {
                if ($this instanceof IContainer) {
                        foreach ($this->getComponents() as $component) {
                                if ($component instanceof self) {
                                        $component->refreshMonitors($depth + 1, $missing, $listeners);
                                }
                        }
                }

                if ($missing === null) { // detaching
                        foreach ($this->monitors as $type => [$ancestor, $inDepth, , $callbacks]) {
                                if (isset($inDepth) && $inDepth > $depth) {
                                        assert($ancestor !== null);
                                        if ($callbacks) { // monitored
                                                $this->monitors[$type] = [null, null, null, $callbacks];
                                                foreach ($callbacks as [, $detached]) {
                                                        $listeners[] = [$detached, $ancestor];
                                                }
                                        } else { // not monitored, just randomly cached
                                                unset($this->monitors[$type]);
                                        }
                                }
                        }
                } else { // attaching
                        foreach ($this->monitors as $type => [$ancestor, , , $callbacks]) {
                                if (isset($ancestor)) { // is in cache yet
                                        continue;

                                } elseif (!$callbacks) { // not monitored, just randomly cached
                                        unset($this->monitors[$type]);

                                } elseif (isset($missing[$type])) { // known from previous lookup
                                        $this->monitors[$type] = [null, null, null, $callbacks];

                                } else {
                                        unset($this->monitors[$type]); // forces re-lookup
                                        assert($type !== '');
                                        if ($ancestor = $this->lookup($type, throw: false)) {
                                                foreach ($callbacks as [$attached]) {
                                                        $listeners[] = [$attached, $ancestor];
                                                }
                                        } else {
                                                $missing[$type] = true;
                                        }

                                        $this->monitors[$type][3] = $callbacks; // mark as monitored
                                }
                        }
                }

                if ($depth === 0 && !$this->callingListeners) { // call listeners
                        $this->callingListeners = true;
                        try {
                                $called = [];
                                foreach ($listeners as [$callback, $component]) {
                                        $key = [$callback, spl_object_id($component)];
                                        if ($callback && !in_array($key, $called, strict: false)) {
                                                $callback($component);
                                                $called[] = $key;
                                        }
                                }
                        } finally {
                                $this->callingListeners = false;
                        }
                }
        }


        /********************* cloneable, serializable ****************d*g**/


        /**
         * Object cloning.
         */
        public function __clone()
        {
                if ($this->parent === null) {
                        return;

                } elseif ($this->parent instanceof Container) {
                        $this->parent = $this->parent->_isCloning();
                        if ($this->parent === null) { // not cloning
                                $this->refreshMonitors(0);
                        }
                } else {
                        $this->parent = null;
                        $this->refreshMonitors(0);
                }
        }


        /**
         * Prevents serialization.
         */
        final public function __serialize()
        {
                throw new Nette\NotImplementedException('Object serialization is not supported by class ' . static::class);
        }
}

1	<?php
2
3	/**
4	* This file is part of the Nette Framework (https://nette.org)
5	* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
6	*/
7
8	declare(strict_types=1);
9
10	namespace Nette\ComponentModel;
11
12	use Nette;
13	use function func_num_args, in_array, substr;
14
15
16	/**
17	* Base class for all components. Components have a parent, name, and can be monitored by ancestors.
18	*
19	* @property-read string $name
20	* @property-read ?IContainer $parent
21	*/
22	abstract class Component implements IComponent
23	{
24	use Nette\SmartObject;
25
26	private ?IContainer $parent = null;
27	private ?string $name = null;
28
29	/**
30	* Monitors: tracks monitored ancestors and registered callbacks.
31	* Combines cached lookup results with callback registrations for each monitored type.
32	* Depth is used to detect when monitored ancestor becomes unreachable during detachment.
33	* Structure: [type => [found object, depth to object, path to object, [[attached, detached], ...]]]
34	* @var array<''\|class-string<Nette\ComponentModel\IComponent>, array{?IComponent, ?int, ?string, array<int, array{?\Closure, ?\Closure}>}>
35	*/
36	private array $monitors = [];
37
38	/** Prevents nested listener execution during refreshMonitors */
39	private bool $callingListeners = false;
40
41
42	/**
43	* Finds the closest ancestor of specified type.
44	* @template T of IComponent
45	* @param ?class-string<T> $type
46	* @param bool $throw throw exception if component doesn't exist?
47	* @return ($type is null ? ($throw is true ? IComponent : ?IComponent) : ($throw is true ? T : ?T))
48	*/
49	final public function lookup(?string $type, bool $throw = true): ?IComponent	1✔
50	{
51	$type ??= '';	1✔
52	if (!isset($this->monitors[$type])) { // not monitored or not processed yet	1✔
53	$ancestor = $this->parent;	1✔
54	$path = self::NameSeparator . $this->name;	1✔
55	$depth = 1;	1✔
56	while ($ancestor !== null) {	1✔
57	$parent = $ancestor->getParent();	1✔
58	if ($type ? $ancestor instanceof $type : $parent === null) {	1✔
59	break;	1✔
60	}
61
62	$path = self::NameSeparator . $ancestor->getName() . $path;	1✔
63	$depth++;	1✔
64	$ancestor = $parent; // IComponent::getParent()	1✔
65	if ($ancestor === $this) {	1✔
66	$ancestor = null; // prevent cycling	×
67	}
68	}
69
70	$this->monitors[$type] = $ancestor	1✔
71	? [$ancestor, $depth, substr($path, 1), []]	1✔
72	: [null, null, null, []]; // not found	1✔
73	}
74
75	if ($throw && $this->monitors[$type][0] === null) {	1✔
76	$desc = $this->name === null ? "type of '" . static::class . "'" : "'$this->name'";	1✔
77	throw new Nette\InvalidStateException("Component $desc is not attached to '$type'.");	1✔
78	}
79
80	return $this->monitors[$type][0];	1✔
81	}
82
83
84	/**
85	* Finds the closest ancestor specified by class or interface name and returns backtrace path.
86	* A path is the concatenation of component names separated by self::NameSeparator.
87	* @param ?class-string<IComponent> $type
88	* @param bool $throw throw exception if component doesn't exist?
89	* @return ($throw is true ? string : ?string)
90	*/
91	final public function lookupPath(?string $type = null, bool $throw = true): ?string	1✔
92	{
93	$this->lookup($type, $throw);	1✔
94	return $this->monitors[$type ?? ''][2];	1✔
95	}
96
97
98	/**
99	* Starts monitoring ancestors for attach/detach events.
100	* @template T of IComponent
101	* @param class-string<T> $type
102	* @param ?(callable(T): void) $attached called when attached to a monitored ancestor
103	* @param ?(callable(T): void) $detached called before detaching from a monitored ancestor
104	*/
105	final public function monitor(string $type, ?callable $attached = null, ?callable $detached = null): void	1✔
106	{
107	if (func_num_args() === 1) {	1✔
108	$attached = $this->attached(...);	1✔
109	$detached = $this->detached(...);	1✔
110	} else {
111	$attached = $attached ? $attached(...) : null;	1✔
112	$detached = $detached ? $detached(...) : null;	1✔
113	}
114
115	if (
116	$attached	1✔
117	&& ($ancestor = $this->lookup($type, throw: false))	1✔
118	&& !in_array([$attached, $detached], $this->monitors[$type][3], strict: false)	1✔
119	) {
120	$attached($ancestor);	1✔
121	}
122
123	$this->monitors[$type][3][] = [$attached, $detached]; // mark as monitored	1✔
124	}	1✔
125
126
127	/**
128	* Stops monitoring ancestors of specified type.
129	* @param class-string<IComponent> $type
130	*/
131	final public function unmonitor(string $type): void
132	{
133	unset($this->monitors[$type]);	×
134	}
135
136
137	/**
138	* This method will be called when the component (or component's parent)
139	* becomes attached to a monitored object. Do not call this method yourself.
140	* @deprecated use monitor($type, $attached)
141	*/
142	protected function attached(IComponent $obj): void
143	{
144	}
145
146
147	/**
148	* This method will be called before the component (or component's parent)
149	* becomes detached from a monitored object. Do not call this method yourself.
150	* @deprecated use monitor($type, null, $detached)
151	*/
152	protected function detached(IComponent $obj): void
153	{
154	}
155
156
157	/******************* interface IComponent *************dg**/
158
159
160	final public function getName(): ?string
161	{
162	return $this->name;	1✔
163	}
164
165
166	/**
167	* Returns the parent container if any.
168	*/
169	final public function getParent(): ?IContainer
170	{
171	return $this->parent;	1✔
172	}
173
174
175	/**
176	* Sets or removes the parent of this component. This method is managed by containers and should
177	* not be called by applications
178	* @throws Nette\InvalidStateException
179	* @internal
180	*/
181	public function setParent(?IContainer $parent, ?string $name = null): static	1✔
182	{
183	if ($parent === null && $this->parent === null && $name !== null) {	1✔
184	$this->name = $name; // just rename	×
185	return $this;	×
186
187	} elseif ($parent === $this->parent && $name === null) {	1✔
188	return $this; // nothing to do	×
189	}
190
191	// A component cannot be given a parent if it already has a parent.
192	if ($this->parent !== null && $parent !== null) {	1✔
193	throw new Nette\InvalidStateException("Component '$this->name' already has a parent.");	1✔
194	}
195
196	// remove from parent
197	if ($parent === null) {	1✔
198	$this->refreshMonitors(0);	1✔
199	$this->parent = null;	1✔
200
201	} else { // add to parent
202	$this->validateParent($parent);	1✔
203	$this->parent = $parent;	1✔
204	if ($name !== null) {	1✔
205	$this->name = $name;	1✔
206	}
207
208	$tmp = [];	1✔
209	$this->refreshMonitors(0, $tmp);	1✔
210	}
211
212	return $this;	1✔
213	}
214
215
216	/**
217	* Validates the new parent before it's set.
218	* Descendant classes can override this to implement custom validation logic.
219	* @throws Nette\InvalidStateException
220	*/
221	protected function validateParent(IContainer $parent): void	1✔
222	{
223	}	1✔
224
225
226	/**
227	* Refreshes monitors.
228	* @param ?array<string, true> $missing (array = attaching, null = detaching)
229	* @param array<int, array{?\Closure, IComponent}> $listeners
230	*/
231	private function refreshMonitors(int $depth, ?array &$missing = null, array &$listeners = []): void	1✔
232	{
233	if ($this instanceof IContainer) {	1✔
234	foreach ($this->getComponents() as $component) {	1✔
235	if ($component instanceof self) {	1✔
236	$component->refreshMonitors($depth + 1, $missing, $listeners);	1✔
237	}
238	}
239	}
240
241	if ($missing === null) { // detaching	1✔
242	foreach ($this->monitors as $type => [$ancestor, $inDepth, , $callbacks]) {	1✔
243	if (isset($inDepth) && $inDepth > $depth) {	1✔
244	assert($ancestor !== null);
245	if ($callbacks) { // monitored	1✔
246	$this->monitors[$type] = [null, null, null, $callbacks];	1✔
247	foreach ($callbacks as [, $detached]) {	1✔
248	$listeners[] = [$detached, $ancestor];	1✔
249	}
250	} else { // not monitored, just randomly cached
251	unset($this->monitors[$type]);	×
252	}
253	}
254	}
255	} else { // attaching
256	foreach ($this->monitors as $type => [$ancestor, , , $callbacks]) {	1✔
257	if (isset($ancestor)) { // is in cache yet	1✔
258	continue;	1✔
259
260	} elseif (!$callbacks) { // not monitored, just randomly cached	1✔
261	unset($this->monitors[$type]);	×
262
263	} elseif (isset($missing[$type])) { // known from previous lookup	1✔
264	$this->monitors[$type] = [null, null, null, $callbacks];	×
265
266	} else {
267	unset($this->monitors[$type]); // forces re-lookup	1✔
268	assert($type !== '');
269	if ($ancestor = $this->lookup($type, throw: false)) {	1✔
270	foreach ($callbacks as [$attached]) {	1✔
271	$listeners[] = [$attached, $ancestor];	1✔
272	}
273	} else {
274	$missing[$type] = true;	1✔
275	}
276
277	$this->monitors[$type][3] = $callbacks; // mark as monitored	1✔
278	}
279	}
280	}
281
282	if ($depth === 0 && !$this->callingListeners) { // call listeners	1✔
283	$this->callingListeners = true;	1✔
284	try {
285	$called = [];	1✔
286	foreach ($listeners as [$callback, $component]) {	1✔
287	$key = [$callback, spl_object_id($component)];	1✔
288	if ($callback && !in_array($key, $called, strict: false)) {	1✔
289	$callback($component);	1✔
290	$called[] = $key;	1✔
291	}
292	}
293	} finally {	1✔
294	$this->callingListeners = false;	1✔
295	}
296	}
297	}	1✔
298
299
300	/******************* cloneable, serializable *************dg**/
301
302
303	/**
304	* Object cloning.
305	*/
306	public function __clone()
307	{
308	if ($this->parent === null) {	1✔
309	return;	×
310
311	} elseif ($this->parent instanceof Container) {	1✔
312	$this->parent = $this->parent->_isCloning();	1✔
313	if ($this->parent === null) { // not cloning	1✔
314	$this->refreshMonitors(0);	1✔
315	}
316	} else {
317	$this->parent = null;	×
318	$this->refreshMonitors(0);	×
319	}
320	}	1✔
321
322
323	/**
324	* Prevents serialization.
325	*/
326	final public function __serialize()
327	{
328	throw new Nette\NotImplementedException('Object serialization is not supported by class ' . static::class);	×
329	}
330	}

nette / component-model / 21196676401

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