[李景山php]每天laravel-20161114|FileViewFinder-2.php

    /**     * Get the path to a template with a named path.     *     * @param  string  $name     * @return string     */    protected function findNamedPathView($name)    {        list($namespace, $view) = $this->getNamespaceSegments($name);// get this namespace and view        return $this->findInPaths($view, $this->hints[$namespace]);// findInPaths    }// Get the path to a template with a named path    /**     * Get the segments of a template with a named path.     *     * @param  string  $name     * @return array     *     * @throws \InvalidArgumentException     */    protected function getNamespaceSegments($name)    {// Get the segments of a template with a named path.        $segments = explode(static::HINT_PATH_DELIMITER, $name);// get a segments        // in this segments        if (count($segments) != 2) {            throw new InvalidArgumentException("View [$name] has an invalid name.");        }// if the result not like as we think, so threw exception        if (! isset($this->hints[$segments[0]])) {            throw new InvalidArgumentException("No hint path defined for [{$segments[0]}].");        }// if no hints , we will throw Exception        return $segments;// return segments    }    /**     * Find the given view in the list of paths.     *     * @param  string  $name     * @param  array   $paths     * @return string     *     * @throws \InvalidArgumentException     */    protected function findInPaths($name, $paths)    {//Find the given view in the list of paths.        foreach ((array) $paths as $path) {            foreach ($this->getPossibleViewFiles($name) as $file) {                if ($this->files->exists($viewPath = $path.'/'.$file)) {                    return $viewPath;// if find it just return                }            }// get Possible View Files        }// loop path        throw new InvalidArgumentException("View [$name] not found.");// default throw Exception    }    /**     * Get an array of possible view files.     *     * @param  string  $name     * @return array     */    protected function getPossibleViewFiles($name)    {//get Possible View Files        return array_map(function ($extension) use ($name) {            return str_replace('.', '/', $name).'.'.$extension;        }, $this->extensions);// two powerfull    }//Get an array of possible view files.    /**     * Add a location to the finder.     *     * @param  string  $location     * @return void     */    public function addLocation($location)    {        $this->paths[] = $location;// add location to path    }//Add a location to the finder    /**     * Add a namespace hint to the finder.     *     * @param  string  $namespace     * @param  string|array  $hints     * @return void     */    public function addNamespace($namespace, $hints)    {//add a namespace hint to the finder        $hints = (array) $hints;// get the array hints        if (isset($this->hints[$namespace])) {            $hints = array_merge($this->hints[$namespace], $hints);        }// if it is isset, combine it with new hints        $this->hints[$namespace] = $hints;// then reset it    }    /**     * Prepend a namespace hint to the finder.     *     * @param  string  $namespace     * @param  string|array  $hints     * @return void     */    public function prependNamespace($namespace, $hints)    {//Prepend a namespace hint to the finder.        $hints = (array) $hints;// get a right hints        if (isset($this->hints[$namespace])) {            $hints = array_merge($hints, $this->hints[$namespace]);        }// this is a good way to hints        $this->hints[$namespace] = $hints;// rewrite it    }    /**     * Register an extension with the view finder.     *     * @param  string  $extension     * @return void     */    public function addExtension($extension)    {//register an extension with the view finder.        if (($index = array_search($extension, $this->extensions)) !== false) {            unset($this->extensions[$index]);        }// index        array_unshift($this->extensions, $extension);    }// add function use this system function to add it    /**     * Returns whether or not the view specify a hint information.     *     * @param  string  $name     * @return bool     */    public function hasHintInformation($name)    {        return strpos($name, static::HINT_PATH_DELIMITER) > 0;    }// Returns whether or not the view specify a hint information.    /**     * Get the filesystem instance.     *     * @return \Illuminate\Filesystem\Filesystem     */    public function getFilesystem()    {        return $this->files;// return files    }// get the filesystem instance.    /**     * Get the active view paths.     *     * @return array     */    public function getPaths()    {        return $this->paths;    }//get paths    /**     * Get the namespace to file path hints.     *     * @return array     */    public function getHints()    {        return $this->hints;    }//get hints    /**     * Get registered extensions.     *     * @return array     */    public function getExtensions()    {        return $this->extensions;    }// get extensions}