类 yii\web\View

                public function __call($name, $params)
{
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $object) {
        if ($object->hasMethod($name)) {
            return call_user_func_array([$object, $name], $params);
        }
    }
    throw new UnknownMethodException('Calling unknown method: ' . get_class($this) . "::$name()");
}

            

                public function __clone()
{
    $this->_events = [];
    $this->_eventWildcards = [];
    $this->_behaviors = null;
}

            

                public function __construct($config = [])
{
    if (!empty($config)) {
        Yii::configure($this, $config);
    }
    $this->init();
}

            

                public function __get($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        // read property, e.g. getName()
        return $this->$getter();
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canGetProperty($name)) {
            return $behavior->$name;
        }
    }
    if (method_exists($this, 'set' . $name)) {
        throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
    }
    throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);
}

            

                public function __isset($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        return $this->$getter() !== null;
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canGetProperty($name)) {
            return $behavior->$name !== null;
        }
    }
    return false;
}

            

                public function __set($name, $value)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        // set property
        $this->$setter($value);
        return;
    } elseif (strncmp($name, 'on ', 3) === 0) {
        // on event: attach event handler
        $this->on(trim(substr($name, 3)), $value);
        return;
    } elseif (strncmp($name, 'as ', 3) === 0) {
        // as behavior: attach behavior
        $name = trim(substr($name, 3));
        $this->attachBehavior($name, $value instanceof Behavior ? $value : Yii::createObject($value));
        return;
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canSetProperty($name)) {
            $behavior->$name = $value;
            return;
        }
    }
    if (method_exists($this, 'get' . $name)) {
        throw new InvalidCallException('Setting read-only property: ' . get_class($this) . '::' . $name);
    }
    throw new UnknownPropertyException('Setting unknown property: ' . get_class($this) . '::' . $name);
}

            

                public function __unset($name)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        $this->$setter(null);
        return;
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canSetProperty($name)) {
            $behavior->$name = null;
            return;
        }
    }
    throw new InvalidCallException('Unsetting an unknown or read-only property: ' . get_class($this) . '::' . $name);
}

            

                public function addDynamicPlaceholder($placeholder, $statements)
{
    foreach ($this->cacheStack as $cache) {
        if ($cache instanceof DynamicContentAwareInterface) {
            $cache->addDynamicPlaceholder($placeholder, $statements);
        } else {
            // TODO: Remove in 2.1
            $cache->dynamicPlaceholders[$placeholder] = $statements;
        }
    }
    $this->dynamicPlaceholders[$placeholder] = $statements;
}

            

                public function afterRender($viewFile, $params, &$output)
{
    if ($this->hasEventHandlers(self::EVENT_AFTER_RENDER)) {
        $event = new ViewEvent([
            'viewFile' => $viewFile,
            'params' => $params,
        ]);
        $event->output =& $output;
        $this->trigger(self::EVENT_AFTER_RENDER, $event);
    }
}

            

                public function attachBehavior($name, $behavior)
{
    $this->ensureBehaviors();
    return $this->attachBehaviorInternal($name, $behavior);
}

            

                public function attachBehaviors($behaviors)
{
    $this->ensureBehaviors();
    foreach ($behaviors as $name => $behavior) {
        $this->attachBehaviorInternal($name, $behavior);
    }
}

            

                public function beforeRender($viewFile, $params)
{
    $event = new ViewEvent([
        'viewFile' => $viewFile,
        'params' => $params,
    ]);
    $this->trigger(self::EVENT_BEFORE_RENDER, $event);
    return $event->isValid;
}

            

                public function beginBlock($id, $renderInPlace = false)
{
    return Block::begin([
        'id' => $id,
        'renderInPlace' => $renderInPlace,
        'view' => $this,
    ]);
}

            

                public function beginCache($id, $properties = [])
{
    $properties['id'] = $id;
    $properties['view'] = $this;
    /* @var $cache FragmentCache */
    $cache = FragmentCache::begin($properties);
    if ($cache->getCachedContent() !== false) {
        $this->endCache();
        return false;
    }
    return true;
}

            

                public function beginContent($viewFile, $params = [])
{
    return ContentDecorator::begin([
        'viewFile' => $viewFile,
        'params' => $params,
        'view' => $this,
    ]);
}

            

                public function beginPage()
{
    ob_start();
    ob_implicit_flush(false);
    $this->trigger(self::EVENT_BEGIN_PAGE);
}

            

                public function behaviors()
{
    return [];
}

            

                public function canGetProperty($name, $checkVars = true, $checkBehaviors = true)
{
    if (method_exists($this, 'get' . $name) || $checkVars && property_exists($this, $name)) {
        return true;
    } elseif ($checkBehaviors) {
        $this->ensureBehaviors();
        foreach ($this->_behaviors as $behavior) {
            if ($behavior->canGetProperty($name, $checkVars)) {
                return true;
            }
        }
    }
    return false;
}

            

                public function canSetProperty($name, $checkVars = true, $checkBehaviors = true)
{
    if (method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name)) {
        return true;
    } elseif ($checkBehaviors) {
        $this->ensureBehaviors();
        foreach ($this->_behaviors as $behavior) {
            if ($behavior->canSetProperty($name, $checkVars)) {
                return true;
            }
        }
    }
    return false;
}

            

                public static function className()
{
    return get_called_class();
}

            

                public function detachBehavior($name)
{
    $this->ensureBehaviors();
    if (isset($this->_behaviors[$name])) {
        $behavior = $this->_behaviors[$name];
        unset($this->_behaviors[$name]);
        $behavior->detach();
        return $behavior;
    }
    return null;
}

            

                public function detachBehaviors()
{
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $name => $behavior) {
        $this->detachBehavior($name);
    }
}

            

                public function endBlock()
{
    Block::end();
}

            

                public function endCache()
{
    FragmentCache::end();
}

            

                public function endContent()
{
    ContentDecorator::end();
}

            

                public function ensureBehaviors()
{
    if ($this->_behaviors === null) {
        $this->_behaviors = [];
        foreach ($this->behaviors() as $name => $behavior) {
            $this->attachBehaviorInternal($name, $behavior);
        }
    }
}

            

                public function evaluateDynamicContent($statements)
{
    return eval($statements);
}

            

                protected function findViewFile($view, $context = null)
{
    if (strncmp($view, '@', 1) === 0) {
        // e.g. "@app/views/main"
        $file = Yii::getAlias($view);
    } elseif (strncmp($view, '//', 2) === 0) {
        // e.g. "//layouts/main"
        $file = Yii::$app->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
    } elseif (strncmp($view, '/', 1) === 0) {
        // e.g. "/site/index"
        if (Yii::$app->controller !== null) {
            $file = Yii::$app->controller->module->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
        } else {
            throw new InvalidCallException("Unable to locate view file for view '$view': no active controller.");
        }
    } elseif ($context instanceof ViewContextInterface) {
        $file = $context->getViewPath() . DIRECTORY_SEPARATOR . $view;
    } elseif (($currentViewFile = $this->getRequestedViewFile()) !== false) {
        $file = dirname($currentViewFile) . DIRECTORY_SEPARATOR . $view;
    } else {
        throw new InvalidCallException("Unable to resolve view file for view '$view': no active view context.");
    }
    if (pathinfo($file, PATHINFO_EXTENSION) !== '') {
        return $file;
    }
    $path = $file . '.' . $this->defaultExtension;
    if ($this->defaultExtension !== 'php' && !is_file($path)) {
        $path = $file . '.php';
    }
    return $path;
}

            

                public function getBehavior($name)
{
    $this->ensureBehaviors();
    return isset($this->_behaviors[$name]) ? $this->_behaviors[$name] : null;
}

            

                public function getBehaviors()
{
    $this->ensureBehaviors();
    return $this->_behaviors;
}

            

                public function getDynamicContents()
{
    return $this->cacheStack;
}

            

                public function getDynamicPlaceholders()
{
    return $this->dynamicPlaceholders;
}

            

                protected function getRequestedViewFile()
{
    return empty($this->_viewFiles) ? false : end($this->_viewFiles)['requested'];
}

            

                public function getViewFile()
{
    return empty($this->_viewFiles) ? false : end($this->_viewFiles)['resolved'];
}

            

                public function hasEventHandlers($name)
{
    $this->ensureBehaviors();
    if (!empty($this->_events[$name])) {
        return true;
    }
    foreach ($this->_eventWildcards as $wildcard => $handlers) {
        if (!empty($handlers) && StringHelper::matchWildcard($wildcard, $name)) {
            return true;
        }
    }
    return Event::hasHandlers($this, $name);
}

            

                public function hasMethod($name, $checkBehaviors = true)
{
    if (method_exists($this, $name)) {
        return true;
    } elseif ($checkBehaviors) {
        $this->ensureBehaviors();
        foreach ($this->_behaviors as $behavior) {
            if ($behavior->hasMethod($name)) {
                return true;
            }
        }
    }
    return false;
}

            

                public function hasProperty($name, $checkVars = true, $checkBehaviors = true)
{
    return $this->canGetProperty($name, $checkVars, $checkBehaviors) || $this->canSetProperty($name, false, $checkBehaviors);
}

            

                public function init()
{
    parent::init();
    if (is_array($this->theme)) {
        if (!isset($this->theme['class'])) {
            $this->theme['class'] = 'yii\base\Theme';
        }
        $this->theme = Yii::createObject($this->theme);
    } elseif (is_string($this->theme)) {
        $this->theme = Yii::createObject($this->theme);
    }
}

            

                public function off($name, $handler = null)
{
    $this->ensureBehaviors();
    if (empty($this->_events[$name]) && empty($this->_eventWildcards[$name])) {
        return false;
    }
    if ($handler === null) {
        unset($this->_events[$name], $this->_eventWildcards[$name]);
        return true;
    }
    $removed = false;
    // plain event names
    if (isset($this->_events[$name])) {
        foreach ($this->_events[$name] as $i => $event) {
            if ($event[0] === $handler) {
                unset($this->_events[$name][$i]);
                $removed = true;
            }
        }
        if ($removed) {
            $this->_events[$name] = array_values($this->_events[$name]);
            return true;
        }
    }
    // wildcard event names
    if (isset($this->_eventWildcards[$name])) {
        foreach ($this->_eventWildcards[$name] as $i => $event) {
            if ($event[0] === $handler) {
                unset($this->_eventWildcards[$name][$i]);
                $removed = true;
            }
        }
        if ($removed) {
            $this->_eventWildcards[$name] = array_values($this->_eventWildcards[$name]);
            // remove empty wildcards to save future redundant regex checks:
            if (empty($this->_eventWildcards[$name])) {
                unset($this->_eventWildcards[$name]);
            }
        }
    }
    return $removed;
}

            

                public function on($name, $handler, $data = null, $append = true)
{
    $this->ensureBehaviors();
    if (strpos($name, '*') !== false) {
        if ($append || empty($this->_eventWildcards[$name])) {
            $this->_eventWildcards[$name][] = [$handler, $data];
        } else {
            array_unshift($this->_eventWildcards[$name], [$handler, $data]);
        }
        return;
    }
    if ($append || empty($this->_events[$name])) {
        $this->_events[$name][] = [$handler, $data];
    } else {
        array_unshift($this->_events[$name], [$handler, $data]);
    }
}

            

                public function popDynamicContent()
{
    array_pop($this->cacheStack);
}

            

                public function pushDynamicContent(DynamicContentAwareInterface $instance)
{
    $this->cacheStack[] = $instance;
}

            

                public function render($view, $params = [], $context = null)
{
    $viewFile = $this->findViewFile($view, $context);
    return $this->renderFile($viewFile, $params, $context);
}

            

                public function renderDynamic($statements)
{
    if (!empty($this->cacheStack)) {
        $n = count($this->dynamicPlaceholders);
        $placeholder = "<![CDATA[YII-DYNAMIC-$n]]>";
        $this->addDynamicPlaceholder($placeholder, $statements);
        return $placeholder;
    }
    return $this->evaluateDynamicContent($statements);
}

            

                public function renderFile($viewFile, $params = [], $context = null)
{
    $viewFile = $requestedFile = Yii::getAlias($viewFile);
    if ($this->theme !== null) {
        $viewFile = $this->theme->applyTo($viewFile);
    }
    if (is_file($viewFile)) {
        $viewFile = FileHelper::localize($viewFile);
    } else {
        throw new ViewNotFoundException("The view file does not exist: $viewFile");
    }
    $oldContext = $this->context;
    if ($context !== null) {
        $this->context = $context;
    }
    $output = '';
    $this->_viewFiles[] = [
        'resolved' => $viewFile,
        'requested' => $requestedFile
    ];
    if ($this->beforeRender($viewFile, $params)) {
        Yii::debug("Rendering view file: $viewFile", __METHOD__);
        $ext = pathinfo($viewFile, PATHINFO_EXTENSION);
        if (isset($this->renderers[$ext])) {
            if (is_array($this->renderers[$ext]) || is_string($this->renderers[$ext])) {
                $this->renderers[$ext] = Yii::createObject($this->renderers[$ext]);
            }
            /* @var $renderer ViewRenderer */
            $renderer = $this->renderers[$ext];
            $output = $renderer->render($this, $viewFile, $params);
        } else {
            $output = $this->renderPhpFile($viewFile, $params);
        }
        $this->afterRender($viewFile, $params, $output);
    }
    array_pop($this->_viewFiles);
    $this->context = $oldContext;
    return $output;
}

            

                public function renderPhpFile($_file_, $_params_ = [])
{
    $_obInitialLevel_ = ob_get_level();
    ob_start();
    ob_implicit_flush(false);
    extract($_params_, EXTR_OVERWRITE);
    try {
        require $_file_;
        return ob_get_clean();
    } catch (\Exception $e) {
        while (ob_get_level() > $_obInitialLevel_) {
            if (!@ob_end_clean()) {
                ob_clean();
            }
        }
        throw $e;
    } catch (\Throwable $e) {
        while (ob_get_level() > $_obInitialLevel_) {
            if (!@ob_end_clean()) {
                ob_clean();
            }
        }
        throw $e;
    }
}

            

                public function setDynamicPlaceholders($placeholders)
{
    $this->dynamicPlaceholders = $placeholders;
}

            

                public function trigger($name, Event $event = null)
{
    $this->ensureBehaviors();
    $eventHandlers = [];
    foreach ($this->_eventWildcards as $wildcard => $handlers) {
        if (StringHelper::matchWildcard($wildcard, $name)) {
            $eventHandlers[] = $handlers;
        }
    }
    if (!empty($this->_events[$name])) {
        $eventHandlers[] = $this->_events[$name];
    }
    if (!empty($eventHandlers)) {
        $eventHandlers = call_user_func_array('array_merge', $eventHandlers);
        if ($event === null) {
            $event = new Event();
        }
        if ($event->sender === null) {
            $event->sender = $this;
        }
        $event->handled = false;
        $event->name = $name;
        foreach ($eventHandlers as $handler) {
            $event->data = $handler[1];
            call_user_func($handler[0], $event);
            // stop further handling if the event is handled
            if ($event->handled) {
                return;
            }
        }
    }
    // invoke class-level attached handlers
    Event::trigger($this, $name, $event);
}