silverstripe-framework/view/SSViewer.php
Hamish Friedlander b8b4e98ac2 API Theme stacking
2016-07-15 16:29:25 +12:00

1373 lines
42 KiB
PHP

<?php
use SilverStripe\ORM\FieldType\DBField;
use SilverStripe\ORM\FieldType\DBHTMLText;
use SilverStripe\Security\Permission;
use SilverStripe\View\TemplateLoader;
/**
* This tracks the current scope for an SSViewer instance. It has three goals:
* - Handle entering & leaving sub-scopes in loops and withs
* - Track Up and Top
* - (As a side effect) Inject data that needs to be available globally (used to live in ViewableData)
*
* In order to handle up, rather than tracking it using a tree, which would involve constructing new objects
* for each step, we use indexes into the itemStack (which already has to exist).
*
* Each item has three indexes associated with it
*
* - Pop. Which item should become the scope once the current scope is popped out of
* - Up. Which item is up from this item
* - Current. Which item is the first time this object has appeared in the stack
*
* We also keep the index of the current starting point for lookups. A lookup is a sequence of obj calls -
* when in a loop or with tag the end result becomes the new scope, but for injections, we throw away the lookup
* and revert back to the original scope once we've got the value we're after
*
* @package framework
* @subpackage view
*/
class SSViewer_Scope {
const ITEM = 0;
const ITEM_ITERATOR = 1;
const ITEM_ITERATOR_TOTAL = 2;
const POP_INDEX = 3;
const UP_INDEX = 4;
const CURRENT_INDEX = 5;
const ITEM_OVERLAY = 6;
// The stack of previous "global" items
// An indexed array of item, item iterator, item iterator total, pop index, up index, current index & parent overlay
private $itemStack = array();
// The current "global" item (the one any lookup starts from)
protected $item;
// If we're looping over the current "global" item, here's the iterator that tracks with item we're up to
protected $itemIterator;
//Total number of items in the iterator
protected $itemIteratorTotal;
// A pointer into the item stack for which item should be scope on the next pop call
private $popIndex;
// A pointer into the item stack for which item is "up" from this one
private $upIndex = null;
// A pointer into the item stack for which item is this one (or null if not in stack yet)
private $currentIndex = null;
private $localIndex;
public function __construct($item, $inheritedScope = null) {
$this->item = $item;
$this->localIndex = 0;
$this->localStack = array();
if ($inheritedScope instanceof SSViewer_Scope) {
$this->itemIterator = $inheritedScope->itemIterator;
$this->itemIteratorTotal = $inheritedScope->itemIteratorTotal;
$this->itemStack[] = array($this->item, $this->itemIterator, $this->itemIteratorTotal, null, null, 0);
} else {
$this->itemStack[] = array($this->item, null, 0, null, null, 0);
}
}
public function getItem(){
return $this->itemIterator ? $this->itemIterator->current() : $this->item;
}
/** Called at the start of every lookup chain by SSTemplateParser to indicate a new lookup from local scope */
public function locally() {
list($this->item, $this->itemIterator, $this->itemIteratorTotal, $this->popIndex, $this->upIndex,
$this->currentIndex) = $this->itemStack[$this->localIndex];
// Remember any un-completed (resetLocalScope hasn't been called) lookup chain. Even if there isn't an
// un-completed chain we need to store an empty item, as resetLocalScope doesn't know the difference later
$this->localStack[] = array_splice($this->itemStack, $this->localIndex+1);
return $this;
}
public function resetLocalScope(){
$previousLocalState = $this->localStack ? array_pop($this->localStack) : null;
array_splice($this->itemStack, $this->localIndex+1, count($this->itemStack), $previousLocalState);
list($this->item, $this->itemIterator, $this->itemIteratorTotal, $this->popIndex, $this->upIndex,
$this->currentIndex) = end($this->itemStack);
}
public function getObj($name, $arguments = [], $cache = false, $cacheName = null) {
$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
return $on->obj($name, $arguments, $cache, $cacheName);
}
public function obj($name, $arguments = [], $cache = false, $cacheName = null) {
switch ($name) {
case 'Up':
if ($this->upIndex === null) {
user_error('Up called when we\'re already at the top of the scope', E_USER_ERROR);
}
list($this->item, $this->itemIterator, $this->itemIteratorTotal, $unused2, $this->upIndex,
$this->currentIndex) = $this->itemStack[$this->upIndex];
break;
case 'Top':
list($this->item, $this->itemIterator, $this->itemIteratorTotal, $unused2, $this->upIndex,
$this->currentIndex) = $this->itemStack[0];
break;
default:
$this->item = $this->getObj($name, $arguments, $cache, $cacheName);
$this->itemIterator = null;
$this->upIndex = $this->currentIndex ? $this->currentIndex : count($this->itemStack)-1;
$this->currentIndex = count($this->itemStack);
break;
}
$this->itemStack[] = array($this->item, $this->itemIterator, $this->itemIteratorTotal, null,
$this->upIndex, $this->currentIndex);
return $this;
}
/**
* Gets the current object and resets the scope.
*
* @return object
*/
public function self() {
$result = $this->itemIterator ? $this->itemIterator->current() : $this->item;
$this->resetLocalScope();
return $result;
}
public function pushScope(){
$newLocalIndex = count($this->itemStack)-1;
$this->popIndex = $this->itemStack[$newLocalIndex][SSViewer_Scope::POP_INDEX] = $this->localIndex;
$this->localIndex = $newLocalIndex;
// We normally keep any previous itemIterator around, so local $Up calls reference the right element. But
// once we enter a new global scope, we need to make sure we use a new one
$this->itemIterator = $this->itemStack[$newLocalIndex][SSViewer_Scope::ITEM_ITERATOR] = null;
return $this;
}
public function popScope(){
$this->localIndex = $this->popIndex;
$this->resetLocalScope();
return $this;
}
public function next(){
if (!$this->item) return false;
if (!$this->itemIterator) {
if (is_array($this->item)) $this->itemIterator = new ArrayIterator($this->item);
else $this->itemIterator = $this->item->getIterator();
$this->itemStack[$this->localIndex][SSViewer_Scope::ITEM_ITERATOR] = $this->itemIterator;
$this->itemIteratorTotal = iterator_count($this->itemIterator); //count the total number of items
$this->itemStack[$this->localIndex][SSViewer_Scope::ITEM_ITERATOR_TOTAL] = $this->itemIteratorTotal;
$this->itemIterator->rewind();
}
else {
$this->itemIterator->next();
}
$this->resetLocalScope();
if (!$this->itemIterator->valid()) return false;
return $this->itemIterator->key();
}
public function __call($name, $arguments) {
$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
$retval = $on ? call_user_func_array(array($on, $name), $arguments) : null;
$this->resetLocalScope();
return $retval;
}
/**
* @return array
*/
protected function getItemStack() {
return $this->itemStack;
}
/**
* @param array
*/
protected function setItemStack(array $stack) {
$this->itemStack = $stack;
}
/**
* @return int|null
*/
protected function getUpIndex() {
return $this->upIndex;
}
}
/**
* Defines an extra set of basic methods that can be used in templates
* that are not defined on sub-classes of {@link ViewableData}.
*
* @package framework
* @subpackage view
*/
class SSViewer_BasicIteratorSupport implements TemplateIteratorProvider {
protected $iteratorPos;
protected $iteratorTotalItems;
public static function get_template_iterator_variables() {
return array(
'First',
'Last',
'FirstLast',
'Middle',
'MiddleString',
'Even',
'Odd',
'EvenOdd',
'Pos',
'FromEnd',
'TotalItems',
'Modulus',
'MultipleOf',
);
}
/**
* Set the current iterator properties - where we are on the iterator.
*
* @param int $pos position in iterator
* @param int $totalItems total number of items
*/
public function iteratorProperties($pos, $totalItems) {
$this->iteratorPos = $pos;
$this->iteratorTotalItems = $totalItems;
}
/**
* Returns true if this object is the first in a set.
*
* @return bool
*/
public function First() {
return $this->iteratorPos == 0;
}
/**
* Returns true if this object is the last in a set.
*
* @return bool
*/
public function Last() {
return $this->iteratorPos == $this->iteratorTotalItems - 1;
}
/**
* Returns 'first' or 'last' if this is the first or last object in the set.
*
* @return string|null
*/
public function FirstLast() {
if($this->First() && $this->Last()) return 'first last';
if($this->First()) return 'first';
if($this->Last()) return 'last';
}
/**
* Return true if this object is between the first & last objects.
*
* @return bool
*/
public function Middle() {
return !$this->First() && !$this->Last();
}
/**
* Return 'middle' if this object is between the first & last objects.
*
* @return string|null
*/
public function MiddleString() {
if($this->Middle()) return 'middle';
}
/**
* Return true if this object is an even item in the set.
* The count starts from $startIndex, which defaults to 1.
*
* @param int $startIndex Number to start count from.
* @return bool
*/
public function Even($startIndex = 1) {
return !$this->Odd($startIndex);
}
/**
* Return true if this is an odd item in the set.
*
* @param int $startIndex Number to start count from.
* @return bool
*/
public function Odd($startIndex = 1) {
return (bool) (($this->iteratorPos+$startIndex) % 2);
}
/**
* Return 'even' or 'odd' if this object is in an even or odd position in the set respectively.
*
* @param int $startIndex Number to start count from.
* @return string
*/
public function EvenOdd($startIndex = 1) {
return ($this->Even($startIndex)) ? 'even' : 'odd';
}
/**
* Return the numerical position of this object in the container set. The count starts at $startIndex.
* The default is the give the position using a 1-based index.
*
* @param int $startIndex Number to start count from.
* @return int
*/
public function Pos($startIndex = 1) {
return $this->iteratorPos + $startIndex;
}
/**
* Return the position of this item from the last item in the list. The position of the final
* item is $endIndex, which defaults to 1.
*
* @param integer $endIndex Value of the last item
* @return int
*/
public function FromEnd($endIndex = 1) {
return $this->iteratorTotalItems - $this->iteratorPos + $endIndex - 1;
}
/**
* Return the total number of "sibling" items in the dataset.
*
* @return int
*/
public function TotalItems() {
return $this->iteratorTotalItems;
}
/**
* Returns the modulus of the numerical position of the item in the data set.
* The count starts from $startIndex, which defaults to 1.
* @param int $Mod The number to perform Mod operation to.
* @param int $startIndex Number to start count from.
* @return int
*/
public function Modulus($mod, $startIndex = 1) {
return ($this->iteratorPos + $startIndex) % $mod;
}
/**
* Returns true or false depending on if the pos of the iterator is a multiple of a specific number.
* So, <% if MultipleOf(3) %> would return true on indexes: 3,6,9,12,15, etc.
* The count starts from $offset, which defaults to 1.
* @param int $factor The multiple of which to return
* @param int $offset Number to start count from.
* @return bool
*/
public function MultipleOf($factor, $offset = 1) {
return (bool) ($this->Modulus($factor, $offset) == 0);
}
}
/**
* This extends SSViewer_Scope to mix in data on top of what the item provides. This can be "global"
* data that is scope-independant (like BaseURL), or type-specific data that is layered on top cross-cut like
* (like $FirstLast etc).
*
* It's separate from SSViewer_Scope to keep that fairly complex code as clean as possible.
*
* @package framework
* @subpackage view
*/
class SSViewer_DataPresenter extends SSViewer_Scope {
private static $globalProperties = null;
private static $iteratorProperties = null;
/**
* Overlay variables. Take precedence over anything from the current scope
* @var array|null
*/
protected $overlay;
/**
* Underlay variables. Concede precedence to overlay variables or anything from the current scope
* @var array|null
*/
protected $underlay;
public function __construct($item, $overlay = null, $underlay = null, $inheritedScope = null) {
parent::__construct($item, $inheritedScope);
// Build up global property providers array only once per request
if (self::$globalProperties === null) {
self::$globalProperties = array();
// Get all the exposed variables from all classes that implement the TemplateGlobalProvider interface
$this->createCallableArray(self::$globalProperties, "TemplateGlobalProvider",
"get_template_global_variables");
}
// Build up iterator property providers array only once per request
if (self::$iteratorProperties === null) {
self::$iteratorProperties = array();
// Get all the exposed variables from all classes that implement the TemplateIteratorProvider interface
// //call non-statically
$this->createCallableArray(self::$iteratorProperties, "TemplateIteratorProvider",
"get_template_iterator_variables", true);
}
$this->overlay = $overlay ? $overlay : array();
$this->underlay = $underlay ? $underlay : array();
}
protected function createCallableArray(&$extraArray, $interfaceToQuery, $variableMethod, $createObject = false) {
$implementers = ClassInfo::implementorsOf($interfaceToQuery);
if($implementers) foreach($implementers as $implementer) {
// Create a new instance of the object for method calls
if ($createObject) $implementer = new $implementer();
// Get the exposed variables
$exposedVariables = call_user_func(array($implementer, $variableMethod));
foreach($exposedVariables as $varName => $details) {
if (!is_array($details)) $details = array('method' => $details,
'casting' => Config::inst()->get('ViewableData', 'default_cast', Config::FIRST_SET));
// If just a value (and not a key => value pair), use it for both key and value
if (is_numeric($varName)) $varName = $details['method'];
// Add in a reference to the implementing class (might be a string class name or an instance)
$details['implementer'] = $implementer;
// And a callable array
if (isset($details['method'])) $details['callable'] = array($implementer, $details['method']);
// Save with both uppercase & lowercase first letter, so either works
$lcFirst = strtolower($varName[0]) . substr($varName,1);
$extraArray[$lcFirst] = $details;
$extraArray[ucfirst($varName)] = $details;
}
}
}
/**
* Get the injected value
*
* @param string $property Name of property
* @param array $params
* @param bool $cast If true, an object is always returned even if not an object.
* @return array Result array with the keys 'value' for raw value, or 'obj' if contained in an object
* @throws InvalidArgumentException
*/
public function getInjectedValue($property, $params, $cast = true) {
$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
// Find the source of the value
$source = null;
// Check for a presenter-specific override
if (array_key_exists($property, $this->overlay)) {
$source = array('value' => $this->overlay[$property]);
}
// Check if the method to-be-called exists on the target object - if so, don't check any further
// injection locations
else if (isset($on->$property) || method_exists($on, $property)) {
$source = null;
}
// Check for a presenter-specific override
else if (array_key_exists($property, $this->underlay)) {
$source = array('value' => $this->underlay[$property]);
}
// Then for iterator-specific overrides
else if (array_key_exists($property, self::$iteratorProperties)) {
$source = self::$iteratorProperties[$property];
if ($this->itemIterator) {
// Set the current iterator position and total (the object instance is the first item in
// the callable array)
$source['implementer']->iteratorProperties($this->itemIterator->key(), $this->itemIteratorTotal);
} else {
// If we don't actually have an iterator at the moment, act like a list of length 1
$source['implementer']->iteratorProperties(0, 1);
}
}
// And finally for global overrides
else if (array_key_exists($property, self::$globalProperties)) {
$source = self::$globalProperties[$property]; //get the method call
}
if ($source) {
$res = array();
// Look up the value - either from a callable, or from a directly provided value
if (isset($source['callable'])) $res['value'] = call_user_func_array($source['callable'], $params);
elseif (isset($source['value'])) $res['value'] = $source['value'];
else throw new InvalidArgumentException("Injected property $property does't have a value or callable " .
"value source provided");
// If we want to provide a casted object, look up what type object to use
if ($cast) {
// If the handler returns an object, then we don't need to cast.
if(is_object($res['value'])) {
$res['obj'] = $res['value'];
} else {
// Get the object to cast as
$casting = isset($source['casting']) ? $source['casting'] : null;
// If not provided, use default
if (!$casting) $casting = Config::inst()->get('ViewableData', 'default_cast', Config::FIRST_SET);
$obj = Injector::inst()->get($casting, false, array($property));
$obj->setValue($res['value']);
$res['obj'] = $obj;
}
}
return $res;
}
}
/**
* Store the current overlay (as it doesn't directly apply to the new scope
* that's being pushed). We want to store the overlay against the next item
* "up" in the stack (hence upIndex), rather than the current item, because
* SSViewer_Scope::obj() has already been called and pushed the new item to
* the stack by this point
* @return SSViewer_Scope
*/
public function pushScope() {
$scope = parent::pushScope();
$upIndex = $this->getUpIndex();
if ($upIndex !== null) {
$itemStack = $this->getItemStack();
$itemStack[$upIndex][SSViewer_Scope::ITEM_OVERLAY] = $this->overlay;
$this->setItemStack($itemStack);
$this->overlay = array();
}
return $scope;
}
/**
* Now that we're going to jump up an item in the item stack, we need to
* restore the overlay that was previously stored against the next item "up"
* in the stack from the current one
* @return SSViewer_Scope
*/
public function popScope() {
$upIndex = $this->getUpIndex();
if ($upIndex !== null) {
$itemStack = $this->getItemStack();
$this->overlay = $itemStack[$this->getUpIndex()][SSViewer_Scope::ITEM_OVERLAY];
}
return parent::popScope();
}
/**
* $Up and $Top need to restore the overlay from the parent and top-level
* scope respectively.
*/
public function obj($name, $arguments = [], $cache = false, $cacheName = null) {
$overlayIndex = false;
switch($name) {
case 'Up':
$upIndex = $this->getUpIndex();
if ($upIndex === null) {
user_error('Up called when we\'re already at the top of the scope', E_USER_ERROR);
}
$overlayIndex = $upIndex; // Parent scope
break;
case 'Top':
$overlayIndex = 0; // Top-level scope
break;
}
if ($overlayIndex !== false) {
$itemStack = $this->getItemStack();
if (!$this->overlay && isset($itemStack[$overlayIndex][SSViewer_Scope::ITEM_OVERLAY])) {
$this->overlay = $itemStack[$overlayIndex][SSViewer_Scope::ITEM_OVERLAY];
}
}
return parent::obj($name, $arguments, $cache, $cacheName);
}
public function getObj($name, $arguments = [], $cache = false, $cacheName = null) {
$result = $this->getInjectedValue($name, (array)$arguments);
if($result) {
return $result['obj'];
}
return parent::getObj($name, $arguments, $cache, $cacheName);
}
public function __call($name, $arguments) {
//extract the method name and parameters
$property = $arguments[0]; //the name of the public function being called
//the public function parameters in an array
if (isset($arguments[1]) && $arguments[1] != null) $params = $arguments[1];
else $params = array();
$val = $this->getInjectedValue($property, $params);
if ($val) {
$obj = $val['obj'];
if ($name === 'hasValue') {
$res = $obj instanceof Object
? $obj->exists()
: (bool)$obj;
} else {
// XML_val
$res = $obj->forTemplate();
}
$this->resetLocalScope();
return $res;
} else {
return parent::__call($name, $arguments);
}
}
}
/**
* Parses a template file with an *.ss file extension.
*
* In addition to a full template in the templates/ folder, a template in
* templates/Content or templates/Layout will be rendered into $Content and
* $Layout, respectively.
*
* A single template can be parsed by multiple nested {@link SSViewer} instances
* through $Layout/$Content placeholders, as well as <% include MyTemplateFile %> template commands.
*
* <b>Themes</b>
*
* See http://doc.silverstripe.org/themes and http://doc.silverstripe.org/themes:developing
*
* <b>Caching</b>
*
* Compiled templates are cached via {@link SS_Cache}, usually on the filesystem.
* If you put ?flush=1 on your URL, it will force the template to be recompiled.
*
* @see http://doc.silverstripe.org/themes
* @see http://doc.silverstripe.org/themes:developing
*
* @package framework
* @subpackage view
*/
class SSViewer implements Flushable {
/**
* @config
* @var boolean $source_file_comments
*/
private static $source_file_comments = false;
/**
* @ignore
*/
private static $template_cache_flushed = false;
/**
* @ignore
*/
private static $cacheblock_cache_flushed = false;
/**
* Set whether HTML comments indicating the source .SS file used to render this page should be
* included in the output. This is enabled by default
*
* @deprecated 4.0 Use the "SSViewer.source_file_comments" config setting instead
* @param boolean $val
*/
public static function set_source_file_comments($val) {
Deprecation::notice('4.0', 'Use the "SSViewer.source_file_comments" config setting instead');
Config::inst()->update('SSViewer', 'source_file_comments', $val);
}
/**
* @deprecated 4.0 Use the "SSViewer.source_file_comments" config setting instead
* @return boolean
*/
public static function get_source_file_comments() {
Deprecation::notice('4.0', 'Use the "SSViewer.source_file_comments" config setting instead');
return Config::inst()->get('SSViewer', 'source_file_comments');
}
/**
* @var array $templates List of templates to select from
*/
private $templates = null;
/**
* @var string $chosen Absolute path to chosen template file
*/
private $chosen = null;
/**
* @var array Templates to use when looking up 'Layout' or 'Content'
*/
private $subTemplates = null;
/**
* @var boolean
*/
protected $rewriteHashlinks = true;
/**
* @config
* @var string A list (highest priority first) of themes to use
* Only used when {@link $theme_enabled} is set to TRUE.
*/
private static $themes = [];
/**
* @deprecated 4.0..5.0
* @config
* @var string The used "theme", which usually consists of templates, images and stylesheets.
* Only used when {@link $theme_enabled} is set to TRUE, and $themes is empty
*/
private static $theme = null;
/**
* @config
* @var boolean Use the theme. Set to FALSE in order to disable themes,
* which can be useful for scenarios where theme overrides are temporarily undesired,
* such as an administrative interface separate from the website theme.
* It retains the theme settings to be re-enabled, for example when a website content
* needs to be rendered from within this administrative interface.
*/
private static $theme_enabled = true;
/**
* @var boolean
*/
protected $includeRequirements = true;
/**
* @var TemplateParser
*/
protected $parser;
/*
* Default prepended cache key for partial caching
*
* @var string
* @config
*/
private static $global_key = '$CurrentReadingMode, $CurrentUser.ID';
/**
* Triggered early in the request when someone requests a flush.
*/
public static function flush() {
self::flush_template_cache(true);
self::flush_cacheblock_cache(true);
}
/**
* Create a template from a string instead of a .ss file
*
* @param string $content The template content
* @param bool|void $cacheTemplate Whether or not to cache the template from string
* @return SSViewer
*/
public static function fromString($content, $cacheTemplate = null) {
$viewer = new SSViewer_FromString($content);
if ($cacheTemplate !== null) {
$viewer->setCacheTemplate($cacheTemplate);
}
return $viewer;
}
public static function set_themes($themes = []) {
Config::inst()->remove('SSViewer', 'themes');
Config::inst()->update('SSViewer', 'themes', $themes);
}
public static function add_themes($themes = []) {
Config::inst()->update('SSViewer', 'themes', $themes);
}
public static function get_themes() {
$res = ['$default'];
if (Config::inst()->get('SSViewer', 'theme_enabled')) {
if ($list = Config::inst()->get('SSViewer', 'themes')) $res = $list;
elseif ($theme = Config::inst()->get('SSViewer', 'theme')) $res = [$theme, '$default'];
}
return $res;
}
/**
* @deprecated 4.0 Use the "SSViewer.theme" config setting instead
* @param string $theme The "base theme" name (without underscores).
*/
public static function set_theme($theme) {
Deprecation::notice('4.0', 'Use the "SSViewer#set_themes" instead');
self::set_themes([$theme]);
}
/**
* Traverses the given the given class context looking for templates with the relevant name.
*
* @param $className string - valid class name
* @param $suffix string
* @param $baseClass string
*
* @return array
*/
public static function get_templates_by_class($className, $suffix = '', $baseClass = null) {
// Figure out the class name from the supplied context.
if(!is_string($className) || !class_exists($className)) {
throw new InvalidArgumentException('SSViewer::get_templates_by_class() expects a valid class name as ' .
'its first parameter.');
return array();
}
$templates = array();
$classes = array_reverse(ClassInfo::ancestry($className));
foreach($classes as $class) {
$template = $class . $suffix;
if(SSViewer::hasTemplate($template)) $templates[] = $template;
elseif(SSViewer::hasTemplate('Includes/'.$template)) $templates[] = 'Includes/'.$template;
// If the class is "Page_Controller", look for Page.ss
if(stripos($class,'_controller') !== false) {
$template = str_ireplace('_controller','',$class) . $suffix;
if(SSViewer::hasTemplate($template)) $templates[] = $template;
}
if($baseClass && $class == $baseClass) break;
}
return $templates;
}
/**
* @param string|array $templateList If passed as a string with .ss extension, used as the "main" template.
* If passed as an array, it can be used for template inheritance (first found template "wins").
* Usually the array values are PHP class names, which directly correlate to template names.
* <code>
* array('MySpecificPage', 'MyPage', 'Page')
* </code>
*/
public function __construct($templates, TemplateParser $parser = null) {
if ($parser) {
$this->setParser($parser);
}
$this->setTemplate($templates);
if(!$this->chosen) {
$message = 'None of the following templates could be found: ';
$message .= print_r($templates, true);
$themes = self::get_themes();
if(!$themes) {
$message .= ' (no theme in use)';
} else {
$message .= ' in themes "' . print_r($themes, true) . '"';
}
user_error($message, E_USER_WARNING);
}
}
public function setTemplate($templates) {
$this->templates = $templates;
$this->chosen = TemplateLoader::instance()->findTemplate($templates, self::get_themes());
$this->subTemplates = [];
}
/**
* Set the template parser that will be used in template generation
* @param \TemplateParser $parser
*/
public function setParser(TemplateParser $parser)
{
$this->parser = $parser;
}
/**
* Returns the parser that is set for template generation
* @return \TemplateParser
*/
public function getParser()
{
if (!$this->parser) {
$this->setParser(Injector::inst()->get('SSTemplateParser'));
}
return $this->parser;
}
/**
* Returns true if at least one of the listed templates exists.
*
* @param array $templates
*
* @return boolean
*/
public static function hasTemplate($templates) {
return (bool)TemplateLoader::instance()->findTemplate($templates, self::get_themes());
}
/**
* Set a global rendering option.
*
* The following options are available:
* - rewriteHashlinks: If true (the default), <a href="#..."> will be rewritten to contain the
* current URL. This lets it play nicely with our <base> tag.
* - If rewriteHashlinks = 'php' then, a piece of PHP script will be inserted before the hash
* links: "<?php echo $_SERVER['REQUEST_URI']; ?>". This is useful if you're generating a
* page that will be saved to a .php file and may be accessed from different URLs.
*
* @deprecated 4.0 Use the "SSViewer.rewrite_hash_links" config setting instead
* @param string $optionName
* @param mixed $optionVal
*/
public static function setOption($optionName, $optionVal) {
if($optionName == 'rewriteHashlinks') {
Deprecation::notice('4.0', 'Use the "SSViewer.rewrite_hash_links" config setting instead');
Config::inst()->update('SSViewer', 'rewrite_hash_links', $optionVal);
} else {
Deprecation::notice('4.0', 'Use the "SSViewer.' . $optionName . '" config setting instead');
Config::inst()->update('SSViewer', $optionName, $optionVal);
}
}
/**
* @deprecated 4.0 Use the "SSViewer.rewrite_hash_links" config setting instead
* @param string
* @return mixed
*/
public static function getOption($optionName) {
if($optionName == 'rewriteHashlinks') {
Deprecation::notice('4.0', 'Use the "SSViewer.rewrite_hash_links" config setting instead');
return Config::inst()->get('SSViewer', 'rewrite_hash_links');
} else {
Deprecation::notice('4.0', 'Use the "SSViewer.' . $optionName . '" config setting instead');
return Config::inst()->get('SSViewer', $optionName);
}
}
/**
* @config
* @var boolean
*/
private static $rewrite_hash_links = true;
protected static $topLevel = array();
public static function topLevel() {
if(SSViewer::$topLevel) {
return SSViewer::$topLevel[sizeof(SSViewer::$topLevel)-1];
}
}
/**
* Call this to disable rewriting of <a href="#xxx"> links. This is useful in Ajax applications.
* It returns the SSViewer objects, so that you can call new SSViewer("X")->dontRewriteHashlinks()->process();
*/
public function dontRewriteHashlinks() {
$this->rewriteHashlinks = false;
Config::inst()->update('SSViewer', 'rewrite_hash_links', false);
return $this;
}
public function exists() {
return $this->chosen;
}
/**
* @param string $identifier A template name without '.ss' extension or path
* @param string $type The template type, either "main", "Includes" or "Layout"
*
* @return string Full system path to a template file
*/
public static function getTemplateFileByType($identifier, $type) {
return TemplateLoader::instance()->findTemplate(['type' => $type, $identifier], self::get_themes());
}
/**
* Clears all parsed template files in the cache folder.
*
* Can only be called once per request (there may be multiple SSViewer instances).
*
* @param bool $force Set this to true to force a re-flush. If left to false, flushing
* may only be performed once a request.
*/
public static function flush_template_cache($force = false) {
if (!self::$template_cache_flushed || $force) {
$dir = dir(TEMP_FOLDER);
while (false !== ($file = $dir->read())) {
if (strstr($file, '.cache')) unlink(TEMP_FOLDER . '/' . $file);
}
self::$template_cache_flushed = true;
}
}
/**
* Clears all partial cache blocks.
*
* Can only be called once per request (there may be multiple SSViewer instances).
*
* @param bool $force Set this to true to force a re-flush. If left to false, flushing
* may only be performed once a request.
*/
public static function flush_cacheblock_cache($force = false) {
if (!self::$cacheblock_cache_flushed || $force) {
$cache = SS_Cache::factory('cacheblock');
$backend = $cache->getBackend();
if(
$backend instanceof Zend_Cache_Backend_ExtendedInterface
&& ($capabilities = $backend->getCapabilities())
&& $capabilities['tags']
) {
$cache->clean(Zend_Cache::CLEANING_MODE_MATCHING_TAG, $cache->getTags());
} else {
$cache->clean(Zend_Cache::CLEANING_MODE_ALL);
}
self::$cacheblock_cache_flushed = true;
}
}
/**
* @var Zend_Cache_Core
*/
protected $partialCacheStore = null;
/**
* Set the cache object to use when storing / retrieving partial cache blocks.
*
* @param Zend_Cache_Core $cache
*/
public function setPartialCacheStore($cache) {
$this->partialCacheStore = $cache;
}
/**
* Get the cache object to use when storing / retrieving partial cache blocks.
*
* @return Zend_Cache_Core
*/
public function getPartialCacheStore() {
return $this->partialCacheStore ? $this->partialCacheStore : SS_Cache::factory('cacheblock');
}
/**
* Flag whether to include the requirements in this response.
*
* @param boolean
*/
public function includeRequirements($incl = true) {
$this->includeRequirements = $incl;
}
/**
* An internal utility function to set up variables in preparation for including a compiled
* template, then do the include
*
* Effectively this is the common code that both SSViewer#process and SSViewer_FromString#process call
*
* @param string $cacheFile - The path to the file that contains the template compiled to PHP
* @param Object $item - The item to use as the root scope for the template
* @param array|null $overlay - Any variables to layer on top of the scope
* @param array|null $underlay - Any variables to layer underneath the scope
* @param Object $inheritedScope - the current scope of a parent template including a sub-template
*
* @return string - The result of executing the template
*/
protected function includeGeneratedTemplate($cacheFile, $item, $overlay, $underlay, $inheritedScope = null) {
if(isset($_GET['showtemplate']) && $_GET['showtemplate'] && Permission::check('ADMIN')) {
$lines = file($cacheFile);
echo "<h2>Template: $cacheFile</h2>";
echo "<pre>";
foreach($lines as $num => $line) {
echo str_pad($num+1,5) . htmlentities($line, ENT_COMPAT, 'UTF-8');
}
echo "</pre>";
}
$cache = $this->getPartialCacheStore();
$scope = new SSViewer_DataPresenter($item, $overlay, $underlay, $inheritedScope);
$val = '';
include($cacheFile);
return $val;
}
/**
* The process() method handles the "meat" of the template processing.
*
* It takes care of caching the output (via {@link SS_Cache}), as well as
* replacing the special "$Content" and "$Layout" placeholders with their
* respective subtemplates.
*
* The method injects extra HTML in the header via {@link Requirements::includeInHTML()}.
*
* Note: You can call this method indirectly by {@link ViewableData->renderWith()}.
*
* @param ViewableData $item
* @param array|null $arguments - arguments to an included template
* @param Object $inheritedScope - the current scope of a parent template including a sub-template
*
* @return DBHTMLText Parsed template output.
*/
public function process($item, $arguments = null, $inheritedScope = null) {
SSViewer::$topLevel[] = $item;
$template = $this->chosen;
$cacheFile = TEMP_FOLDER . "/.cache"
. str_replace(array('\\','/',':'), '.', Director::makeRelative(realpath($template)));
$lastEdited = filemtime($template);
if(!file_exists($cacheFile) || filemtime($cacheFile) < $lastEdited) {
$content = file_get_contents($template);
$content = $this->parseTemplateContent($content, $template);
$fh = fopen($cacheFile,'w');
fwrite($fh, $content);
fclose($fh);
}
$underlay = array('I18NNamespace' => basename($template));
// Makes the rendered sub-templates available on the parent item,
// through $Content and $Layout placeholders.
foreach(array('Content', 'Layout') as $subtemplate) {
$sub = null;
if(isset($this->subTemplates[$subtemplate])) {
$sub = $this->subTemplates[$subtemplate];
}
elseif(!is_array($this->templates)) {
$sub = ['type' => $subtemplate, $this->templates];
}
elseif(!array_key_exists('type', $this->templates) || !$this->templates['type']) {
$sub = array_merge($this->templates, ['type' => $subtemplate]);
}
if ($sub) {
$subtemplateViewer = clone $this;
// Disable requirements - this will be handled by the parent template
$subtemplateViewer->includeRequirements(false);
// Select the right template
$subtemplateViewer->setTemplate($sub);
if ($subtemplateViewer->exists()) {
$underlay[$subtemplate] = $subtemplateViewer->process($item, $arguments);
}
}
}
$output = $this->includeGeneratedTemplate($cacheFile, $item, $arguments, $underlay, $inheritedScope);
if($this->includeRequirements) {
$output = Requirements::includeInHTML($output);
}
array_pop(SSViewer::$topLevel);
// If we have our crazy base tag, then fix # links referencing the current page.
$rewrite = Config::inst()->get('SSViewer', 'rewrite_hash_links');
if($this->rewriteHashlinks && $rewrite) {
if(strpos($output, '<base') !== false) {
if($rewrite === 'php') {
$thisURLRelativeToBase = "<?php echo Convert::raw2att(preg_replace(\"/^(\\\\/)+/\", \"/\", \$_SERVER['REQUEST_URI'])); ?>";
} else {
$thisURLRelativeToBase = Convert::raw2att(preg_replace("/^(\\/)+/", "/", $_SERVER['REQUEST_URI']));
}
$output = preg_replace('/(<a[^>]+href *= *)"#/i', '\\1"' . $thisURLRelativeToBase . '#', $output);
}
}
return DBField::create_field('HTMLFragment', $output);
}
/**
* Execute the given template, passing it the given data.
* Used by the <% include %> template tag to process templates.
*
* @param string $template Template name
* @param mixed $data Data context
* @param array $arguments Additional arguments
* @return string Evaluated result
*/
public static function execute_template($template, $data, $arguments = null, $scope = null) {
$v = new SSViewer($template);
$v->includeRequirements(false);
return $v->process($data, $arguments, $scope);
}
/**
* Execute the evaluated string, passing it the given data.
* Used by partial caching to evaluate custom cache keys expressed using
* template expressions
*
* @param string $content Input string
* @param mixed $data Data context
* @param array $arguments Additional arguments
* @return string Evaluated result
*/
public static function execute_string($content, $data, $arguments = null) {
$v = SSViewer::fromString($content);
$v->includeRequirements(false);
return $v->process($data, $arguments);
}
public function parseTemplateContent($content, $template="") {
return $this->getParser()->compileString(
$content,
$template,
Director::isDev() && Config::inst()->get('SSViewer', 'source_file_comments')
);
}
/**
* Returns the filenames of the template that will be rendered. It is a map that may contain
* 'Content' & 'Layout', and will have to contain 'main'
*/
public function templates() {
return array_merge(['main' => $this->chosen], $this->subTemplates);
}
/**
* @param string $type "Layout" or "main"
* @param string $file Full system path to the template file
*/
public function setTemplateFile($type, $file) {
if (!$type || $type == 'main') $this->chosen = $file;
else $this->subTemplates[$type] = $file;
}
/**
* Return an appropriate base tag for the given template.
* It will be closed on an XHTML document, and unclosed on an HTML document.
*
* @param $contentGeneratedSoFar The content of the template generated so far; it should contain
* the DOCTYPE declaration.
*/
public static function get_base_tag($contentGeneratedSoFar) {
$base = Director::absoluteBaseURL();
// Is the document XHTML?
if(preg_match('/<!DOCTYPE[^>]+xhtml/i', $contentGeneratedSoFar)) {
return "<base href=\"$base\" />";
} else {
return "<base href=\"$base\"><!--[if lte IE 6]></base><![endif]-->";
}
}
}
/**
* Special SSViewer that will process a template passed as a string, rather than a filename.
* @package framework
* @subpackage view
*/
class SSViewer_FromString extends SSViewer {
/**
* The global template caching behaviour if no instance override is specified
* @config
* @var bool
*/
private static $cache_template = true;
/**
* The template to use
* @var string
*/
protected $content;
/**
* Indicates whether templates should be cached
* @var bool
*/
protected $cacheTemplate;
public function __construct($content, TemplateParser $parser = null) {
if ($parser) {
$this->setParser($parser);
}
$this->content = $content;
}
public function process($item, $arguments = null, $scope = null) {
$hash = sha1($this->content);
$cacheFile = TEMP_FOLDER . "/.cache.$hash";
if(!file_exists($cacheFile) || isset($_GET['flush'])) {
$content = $this->parseTemplateContent($this->content, "string sha1=$hash");
$fh = fopen($cacheFile,'w');
fwrite($fh, $content);
fclose($fh);
}
$val = $this->includeGeneratedTemplate($cacheFile, $item, $arguments, null, $scope);
if ($this->cacheTemplate !== null) {
$cacheTemplate = $this->cacheTemplate;
} else {
$cacheTemplate = Config::inst()->get('SSViewer_FromString', 'cache_template');
}
if (!$cacheTemplate) {
unlink($cacheFile);
}
return $val;
}
/**
* @param boolean $cacheTemplate
*/
public function setCacheTemplate($cacheTemplate) {
$this->cacheTemplate = (bool) $cacheTemplate;
}
/**
* @return boolean
*/
public function getCacheTemplate() {
return $this->cacheTemplate;
}
}