22884715739

Committed 04 Mar 2026 07:34AM UTC coverage: 87.444% (+0.3%) from 87.156%

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Commit Message

made static analysis mandatory

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195 of 223 relevant lines covered (87.44%)

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88.89

/src/ComponentModel/Component.php

<?php declare(strict_types=1);

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

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

nette / component-model / 22884715739

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