21201303594

Committed 21 Jan 2026 07:41AM UTC coverage: 87.156%. Remained the same

Build # 21201303594

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Commit Message

made static analysis mandatory

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88.79

/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{list<\Closure>, list<\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, 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(...);
                }

                $ancestor = $this->lookup($type, throw: false);
                $this->monitors[$type][3] ??= [[], []];

                if ($attached && !in_array($attached(...), $this->monitors[$type][3][0], strict: false)) {
                        $this->monitors[$type][3][0][] = $attached(...);
                        if ($ancestor) {
                                $attached($ancestor);
                        }
                }

                if ($detached) {
                        $this->monitors[$type][3][1][] = $detached(...);
                }
        }


        /**
         * 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 > $depth) { // only process if ancestor was deeper than current detachment point
                                        assert($ancestor !== null);
                                        if ($callbacks) {
                                                $this->monitors[$type] = [null, null, null, $callbacks]; // clear cached object, keep listener registrations
                                                foreach ($callbacks[1] as $detached) {
                                                        $listeners[] = [$detached, $ancestor];
                                                }
                                        } else { // no listeners, just cached lookup result - clear it
                                                unset($this->monitors[$type]);
                                        }
                                }
                        }
                } else { // attaching
                        foreach ($this->monitors as $type => [$ancestor, , , $callbacks]) {
                                if (isset($ancestor)) { // already cached and valid - skip
                                        continue;

                                } elseif (!$callbacks) { // no listeners, just old cached lookup - clear it
                                        unset($this->monitors[$type]);

                                } elseif (isset($missing[$type])) { // already checked during this attach operation - ancestor not found
                                        $this->monitors[$type] = [null, null, null, $callbacks]; // keep listener registrations but clear cache

                                } else { // need to check if ancestor exists
                                        unset($this->monitors[$type]); // force fresh lookup
                                        assert($type !== '');
                                        if ($ancestor = $this->lookup($type, throw: false)) {
                                                foreach ($callbacks[0] as $attached) {
                                                        $listeners[] = [$attached, $ancestor];
                                                }
                                        } else {
                                                $missing[$type] = true; // ancestor not found - remember so we don't check again
                                        }

                                        $this->monitors[$type][3] = $callbacks; // restore listener (lookup() cached result in $this->monitors[$type])
                                }
                        }
                }

                if ($depth === 0 && !$this->callingListeners) { // call listeners
                        $this->callingListeners = true;
                        try {
                                $called = [];
                                foreach ($listeners as [$callback, $component]) {
                                        if (!in_array($key = [$callback, spl_object_id($component)], $called, strict: false)) { // deduplicate: same callback + same object = call once
                                                $callback($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{list<\Closure>, list<\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), null]	1✔
72	: [null, 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	}
111
112	$ancestor = $this->lookup($type, throw: false);	1✔
113	$this->monitors[$type][3] ??= [[], []];	1✔
114
115	if ($attached && !in_array($attached(...), $this->monitors[$type][3][0], strict: false)) {	1✔
116	$this->monitors[$type][3][0][] = $attached(...);	1✔
117	if ($ancestor) {	1✔
118	$attached($ancestor);	1✔
119	}
120	}
121
122	if ($detached) {	1✔
123	$this->monitors[$type][3][1][] = $detached(...);	1✔
124	}
125	}	1✔
126
127
128	/**
129	* Stops monitoring ancestors of specified type.
130	* @param class-string<IComponent> $type
131	*/
132	final public function unmonitor(string $type): void
133	{
134	unset($this->monitors[$type]);	×
135	}
136
137
138	/**
139	* This method will be called when the component (or component's parent)
140	* becomes attached to a monitored object. Do not call this method yourself.
141	* @deprecated use monitor($type, $attached)
142	*/
143	protected function attached(IComponent $obj): void
144	{
145	}
146
147
148	/**
149	* This method will be called before the component (or component's parent)
150	* becomes detached from a monitored object. Do not call this method yourself.
151	* @deprecated use monitor($type, null, $detached)
152	*/
153	protected function detached(IComponent $obj): void
154	{
155	}
156
157
158	/******************* interface IComponent *************dg**/
159
160
161	final public function getName(): ?string
162	{
163	return $this->name;	1✔
164	}
165
166
167	/**
168	* Returns the parent container if any.
169	*/
170	final public function getParent(): ?IContainer
171	{
172	return $this->parent;	1✔
173	}
174
175
176	/**
177	* Sets or removes the parent of this component. This method is managed by containers and should
178	* not be called by applications
179	* @throws Nette\InvalidStateException
180	* @internal
181	*/
182	public function setParent(?IContainer $parent, ?string $name = null): static	1✔
183	{
184	if ($parent === null && $this->parent === null && $name !== null) {	1✔
185	$this->name = $name; // just rename	×
186	return $this;	×
187
188	} elseif ($parent === $this->parent && $name === null) {	1✔
189	return $this; // nothing to do	×
190	}
191
192	// A component cannot be given a parent if it already has a parent.
193	if ($this->parent !== null && $parent !== null) {	1✔
194	throw new Nette\InvalidStateException("Component '$this->name' already has a parent.");	1✔
195	}
196
197	// remove from parent
198	if ($parent === null) {	1✔
199	$this->refreshMonitors(0);	1✔
200	$this->parent = null;	1✔
201
202	} else { // add to parent
203	$this->validateParent($parent);	1✔
204	$this->parent = $parent;	1✔
205	if ($name !== null) {	1✔
206	$this->name = $name;	1✔
207	}
208
209	$tmp = [];	1✔
210	$this->refreshMonitors(0, $tmp);	1✔
211	}
212
213	return $this;	1✔
214	}
215
216
217	/**
218	* Validates the new parent before it's set.
219	* Descendant classes can override this to implement custom validation logic.
220	* @throws Nette\InvalidStateException
221	*/
222	protected function validateParent(IContainer $parent): void	1✔
223	{
224	}	1✔
225
226
227	/**
228	* Refreshes monitors.
229	* @param ?array<string, true> $missing (array = attaching, null = detaching)
230	* @param array<int, array{\Closure, IComponent}> $listeners
231	*/
232	private function refreshMonitors(int $depth, ?array &$missing = null, array &$listeners = []): void	1✔
233	{
234	if ($this instanceof IContainer) {	1✔
235	foreach ($this->getComponents() as $component) {	1✔
236	if ($component instanceof self) {	1✔
237	$component->refreshMonitors($depth + 1, $missing, $listeners);	1✔
238	}
239	}
240	}
241
242	if ($missing === null) { // detaching	1✔
243	foreach ($this->monitors as $type => [$ancestor, $inDepth, , $callbacks]) {	1✔
244	if (isset($inDepth) && $inDepth > $depth) { // only process if ancestor was deeper than current detachment point	1✔
245	assert($ancestor !== null);
246	if ($callbacks) {	1✔
247	$this->monitors[$type] = [null, null, null, $callbacks]; // clear cached object, keep listener registrations	1✔
248	foreach ($callbacks[1] as $detached) {	1✔
249	$listeners[] = [$detached, $ancestor];	1✔
250	}
251	} else { // no listeners, just cached lookup result - clear it
252	unset($this->monitors[$type]);	×
253	}
254	}
255	}
256	} else { // attaching
257	foreach ($this->monitors as $type => [$ancestor, , , $callbacks]) {	1✔
258	if (isset($ancestor)) { // already cached and valid - skip	1✔
259	continue;	1✔
260
261	} elseif (!$callbacks) { // no listeners, just old cached lookup - clear it	1✔
262	unset($this->monitors[$type]);	×
263
264	} elseif (isset($missing[$type])) { // already checked during this attach operation - ancestor not found	1✔
265	$this->monitors[$type] = [null, null, null, $callbacks]; // keep listener registrations but clear cache	×
266
267	} else { // need to check if ancestor exists
268	unset($this->monitors[$type]); // force fresh lookup	1✔
269	assert($type !== '');
270	if ($ancestor = $this->lookup($type, throw: false)) {	1✔
271	foreach ($callbacks[0] as $attached) {	1✔
272	$listeners[] = [$attached, $ancestor];	1✔
273	}
274	} else {
275	$missing[$type] = true; // ancestor not found - remember so we don't check again	1✔
276	}
277
278	$this->monitors[$type][3] = $callbacks; // restore listener (lookup() cached result in $this->monitors[$type])	1✔
279	}
280	}
281	}
282
283	if ($depth === 0 && !$this->callingListeners) { // call listeners	1✔
284	$this->callingListeners = true;	1✔
285	try {
286	$called = [];	1✔
287	foreach ($listeners as [$callback, $component]) {	1✔
288	if (!in_array($key = [$callback, spl_object_id($component)], $called, strict: false)) { // deduplicate: same callback + same object = call once	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	}

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