mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
707 lines
22 KiB
PHP
Executable File
707 lines
22 KiB
PHP
Executable File
<?php
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/**
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* This tracks the current scope for an SSViewer instance. It has three goals:
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* - Handle entering & leaving sub-scopes in loops and withs
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* - Track Up and Top
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* - (As a side effect) Inject data that needs to be available globally (used to live in ViewableData)
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*
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* In order to handle up, rather than tracking it using a tree, which would involve constructing new objects
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* for each step, we use indexes into the itemStack (which already has to exist).
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*
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* Each item has three indexes associated with it
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*
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* - Pop. Which item should become the scope once the current scope is popped out of
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* - Up. Which item is up from this item
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* - Current. Which item is the first time this object has appeared in the stack
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*
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* We also keep the index of the current starting point for lookups. A lookup is a sequence of obj calls -
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* when in a loop or with tag the end result becomes the new scope, but for injections, we throw away the lookup
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* and revert back to the original scope once we've got the value we're after
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*
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*/
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class SSViewer_Scope {
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// The stack of previous "global" items
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// And array of item, itemIterator, pop_index, up_index, current_index
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private $itemStack = array();
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private $item; // The current "global" item (the one any lookup starts from)
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private $itemIterator; // If we're looping over the current "global" item, here's the iterator that tracks with item we're up to
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private $popIndex; // A pointer into the item stack for which item should be scope on the next pop call
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private $upIndex; // A pointer into the item stack for which item is "up" from this one
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private $currentIndex; // A pointer into the item stack for which item is this one (or null if not in stack yet)
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private $localIndex;
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function __construct($item){
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$this->item = $item;
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$this->localIndex=0;
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$this->itemStack[] = array($this->item, null, null, null, 0);
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}
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function getItem(){
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return $this->itemIterator ? $this->itemIterator->current() : $this->item;
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}
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function resetLocalScope(){
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list($this->item, $this->itemIterator, $this->popIndex, $this->upIndex, $this->currentIndex) = $this->itemStack[$this->localIndex];
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array_splice($this->itemStack, $this->localIndex+1);
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}
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function obj($name){
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switch ($name) {
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case 'Up':
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list($this->item, $this->itemIterator, $unused2, $this->upIndex, $this->currentIndex) = $this->itemStack[$this->upIndex];
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break;
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case 'Top':
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list($this->item, $this->itemIterator, $unused2, $this->upIndex, $this->currentIndex) = $this->itemStack[0];
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break;
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default:
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$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
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$arguments = func_get_args();
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$this->item = call_user_func_array(array($on, 'obj'), $arguments);
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$this->itemIterator = null;
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$this->upIndex = $this->currentIndex ? $this->currentIndex : count($this->itemStack)-1;
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$this->currentIndex = count($this->itemStack);
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break;
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}
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$this->itemStack[] = array($this->item, $this->itemIterator, null, $this->upIndex, $this->currentIndex);
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return $this;
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}
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function pushScope(){
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$newLocalIndex = count($this->itemStack)-1;
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$this->popIndex = $this->itemStack[$newLocalIndex][2] = $this->localIndex;
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$this->localIndex = $newLocalIndex;
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// We normally keep any previous itemIterator around, so local $Up calls reference the right element. But
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// once we enter a new global scope, we need to make sure we use a new one
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$this->itemIterator = $this->itemStack[$newLocalIndex][1] = null;
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return $this;
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}
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function popScope(){
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$this->localIndex = $this->popIndex;
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$this->resetLocalScope();
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return $this;
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}
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function next(){
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if (!$this->item) return false;
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if (!$this->itemIterator) {
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if (is_array($this->item)) $this->itemIterator = new ArrayIterator($this->item);
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else $this->itemIterator = $this->item->getIterator();
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$this->itemStack[$this->localIndex][1] = $this->itemIterator;
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$this->itemIterator->rewind();
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}
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else {
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$this->itemIterator->next();
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}
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$this->resetLocalScope();
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if (!$this->itemIterator->valid()) return false;
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return $this->itemIterator->key();
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}
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function __call($name, $arguments) {
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$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
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$retval = call_user_func_array(array($on, $name), $arguments);
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$this->resetLocalScope();
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return $retval;
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}
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}
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/**
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* This extends SSViewer_Scope to mix in data on top of what the item provides. This can be "global"
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* data that is scope-independant (like BaseURL), or type-specific data that is layered on top cross-cut like
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* (like $FirstLast etc).
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*
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* It's separate from SSViewer_Scope to keep that fairly complex code as clean as possible.
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*/
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class SSViewer_DataPresenter extends SSViewer_Scope {
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private $extras;
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function __construct($item, $extras = null){
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parent::__construct($item);
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$this->extras = $extras;
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}
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function __call($name, $arguments) {
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$property = $arguments[0];
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if ($this->extras && array_key_exists($property, $this->extras)) {
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$this->resetLocalScope();
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$value = $this->extras[$arguments[0]];
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switch ($name) {
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case 'hasValue':
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return (bool)$value;
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default:
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return $value;
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}
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}
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return parent::__call($name, $arguments);
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}
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}
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/**
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* Parses a template file with an *.ss file extension.
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*
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* In addition to a full template in the templates/ folder, a template in
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* templates/Content or templates/Layout will be rendered into $Content and
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* $Layout, respectively.
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*
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* A single template can be parsed by multiple nested {@link SSViewer} instances
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* through $Layout/$Content placeholders, as well as <% include MyTemplateFile %> template commands.
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*
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* <b>Themes</b>
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*
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* See http://doc.silverstripe.org/themes and http://doc.silverstripe.org/themes:developing
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*
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* <b>Caching</b>
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*
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* Compiled templates are cached via {@link SS_Cache}, usually on the filesystem.
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* If you put ?flush=all on your URL, it will force the template to be recompiled.
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*
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* <b>Manifest File and Structure</b>
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*
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* Works with the global $_TEMPLATE_MANIFEST which is compiled by {@link ManifestBuilder->getTemplateManifest()}.
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* This associative array lists all template filepaths by "identifier", meaning the name
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* of the template without its path or extension.
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*
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* Example:
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* <code>
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* array(
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* 'LeftAndMain' =>
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* array (
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* 'main' => '/my/system/path/cms/templates/LeftAndMain.ss',
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* ),
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* 'CMSMain_left' =>
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* array (
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* 'Includes' => '/my/system/path/cms/templates/Includes/CMSMain_left.ss',
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* ),
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* 'Page' =>
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* array (
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* 'themes' =>
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* array (
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* 'blackcandy' =>
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* array (
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* 'Layout' => '/my/system/path/themes/blackcandy/templates/Layout/Page.ss',
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* 'main' => '/my/system/path/themes/blackcandy/templates/Page.ss',
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* ),
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* 'blue' =>
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* array (
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* 'Layout' => '/my/system/path/themes/mysite/templates/Layout/Page.ss',
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* 'main' => '/my/system/path/themes/mysite/templates/Page.ss',
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* ),
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* ),
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* ),
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* // ...
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* )
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* </code>
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*
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* @see http://doc.silverstripe.org/themes
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* @see http://doc.silverstripe.org/themes:developing
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*
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* @package sapphire
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* @subpackage view
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*/
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class SSViewer {
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/**
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* @var boolean $source_file_comments
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*/
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protected static $source_file_comments = false;
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/**
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* Set whether HTML comments indicating the source .SS file used to render this page should be
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* included in the output. This is enabled by default
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*
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* @param boolean $val
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*/
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static function set_source_file_comments($val) {
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self::$source_file_comments = $val;
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}
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/**
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* @return boolean
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*/
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static function get_source_file_comments() {
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return self::$source_file_comments;
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}
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/**
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* @var array $chosenTemplates Associative array for the different
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* template containers: "main" and "Layout". Values are absolute file paths to *.ss files.
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*/
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private $chosenTemplates = array();
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/**
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* @var boolean
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*/
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protected $rewriteHashlinks = true;
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/**
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* @var string
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*/
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protected static $current_theme = null;
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/**
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* @var string
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*/
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protected static $current_custom_theme = null;
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/**
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* Create a template from a string instead of a .ss file
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*
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* @return SSViewer
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*/
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static function fromString($content) {
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return new SSViewer_FromString($content);
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}
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/**
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* @param string $theme The "base theme" name (without underscores).
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*/
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static function set_theme($theme) {
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self::$current_theme = $theme;
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//Static publishing needs to have a theme set, otherwise it defaults to the content controller theme
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if(!is_null($theme))
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self::$current_custom_theme=$theme;
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}
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/**
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* @return string
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*/
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static function current_theme() {
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return self::$current_theme;
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}
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/**
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* Returns the path to the theme folder
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*
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* @return String
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*/
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static function get_theme_folder() {
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return self::current_theme() ? THEMES_DIR . "/" . self::current_theme() : project();
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}
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/**
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* @return string
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*/
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static function current_custom_theme(){
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return self::$current_custom_theme;
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}
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/**
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* @param string|array $templateList If passed as a string with .ss extension, used as the "main" template.
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* If passed as an array, it can be used for template inheritance (first found template "wins").
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* Usually the array values are PHP class names, which directly correlate to template names.
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* <code>
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* array('MySpecificPage', 'MyPage', 'Page')
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* </code>
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*/
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public function __construct($templateList) {
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global $_TEMPLATE_MANIFEST;
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// flush template manifest cache if requested
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if (isset($_GET['flush']) && $_GET['flush'] == 'all') {
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if(Director::isDev() || Director::is_cli() || Permission::check('ADMIN')) {
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self::flush_template_cache();
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} else {
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return Security::permissionFailure(null, 'Please log in as an administrator to flush the template cache.');
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}
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}
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if(substr((string) $templateList,-3) == '.ss') {
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$this->chosenTemplates['main'] = $templateList;
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} else {
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if(!is_array($templateList)) $templateList = array($templateList);
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if(isset($_GET['debug_request'])) Debug::message("Selecting templates from the following list: " . implode(", ", $templateList));
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foreach($templateList as $template) {
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// if passed as a partial directory (e.g. "Layout/Page"), split into folder and template components
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if(strpos($template,'/') !== false) list($templateFolder, $template) = explode('/', $template, 2);
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else $templateFolder = null;
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// Use the theme template if available
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if(self::current_theme() && isset($_TEMPLATE_MANIFEST[$template]['themes'][self::current_theme()])) {
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$this->chosenTemplates = array_merge(
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$_TEMPLATE_MANIFEST[$template]['themes'][self::current_theme()],
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$this->chosenTemplates
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);
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if(isset($_GET['debug_request'])) Debug::message("Found template '$template' from main theme '" . self::current_theme() . "': " . var_export($_TEMPLATE_MANIFEST[$template]['themes'][self::current_theme()], true));
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}
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// Fall back to unthemed base templates
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if(isset($_TEMPLATE_MANIFEST[$template]) && (array_keys($_TEMPLATE_MANIFEST[$template]) != array('themes'))) {
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$this->chosenTemplates = array_merge(
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$_TEMPLATE_MANIFEST[$template],
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$this->chosenTemplates
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);
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if(isset($_GET['debug_request'])) Debug::message("Found template '$template' from main template archive, containing the following items: " . var_export($_TEMPLATE_MANIFEST[$template], true));
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unset($this->chosenTemplates['themes']);
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}
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if($templateFolder) {
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$this->chosenTemplates['main'] = $this->chosenTemplates[$templateFolder];
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unset($this->chosenTemplates[$templateFolder]);
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}
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}
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if(isset($_GET['debug_request'])) Debug::message("Final template selections made: " . var_export($this->chosenTemplates, true));
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}
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if(!$this->chosenTemplates) user_error("None of these templates can be found in theme '"
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. self::current_theme() . "': ". implode(".ss, ", $templateList) . ".ss", E_USER_WARNING);
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}
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/**
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* Returns true if at least one of the listed templates exists
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*/
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static function hasTemplate($templateList) {
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if(!is_array($templateList)) $templateList = array($templateList);
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global $_TEMPLATE_MANIFEST;
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foreach($templateList as $template) {
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if(strpos($template,'/') !== false) list($templateFolder, $template) = explode('/', $template, 2);
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if(isset($_TEMPLATE_MANIFEST[$template])) return true;
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}
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return false;
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}
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/**
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* Set a global rendering option.
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* The following options are available:
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* - rewriteHashlinks: If true (the default), <a href="#..."> will be rewritten to contain the
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* current URL. This lets it play nicely with our <base> tag.
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* - If rewriteHashlinks = 'php' then, a piece of PHP script will be inserted before the hash
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* links: "<?php echo $_SERVER['REQUEST_URI']; ?>". This is useful if you're generating a
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* page that will be saved to a .php file and may be accessed from different URLs.
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*/
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public static function setOption($optionName, $optionVal) {
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SSViewer::$options[$optionName] = $optionVal;
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}
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protected static $options = array(
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'rewriteHashlinks' => true,
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);
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protected static $topLevel = array();
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public static function topLevel() {
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if(SSViewer::$topLevel) {
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return SSViewer::$topLevel[sizeof(SSViewer::$topLevel)-1];
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}
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}
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/**
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* Call this to disable rewriting of <a href="#xxx"> links. This is useful in Ajax applications.
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* It returns the SSViewer objects, so that you can call new SSViewer("X")->dontRewriteHashlinks()->process();
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*/
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public function dontRewriteHashlinks() {
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$this->rewriteHashlinks = false;
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self::$options['rewriteHashlinks'] = false;
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return $this;
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}
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public function exists() {
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return $this->chosenTemplates;
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}
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/**
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* Searches for a template name in the current theme:
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* - themes/mytheme/templates
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* - themes/mytheme/templates/Includes
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* Falls back to unthemed template files.
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*
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* Caution: Doesn't search in any /Layout folders.
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*
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* @param string $identifier A template name without '.ss' extension or path.
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* @return string Full system path to a template file
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*/
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public static function getTemplateFile($identifier) {
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global $_TEMPLATE_MANIFEST;
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$includeTemplateFile = self::getTemplateFileByType($identifier, 'Includes');
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if($includeTemplateFile) return $includeTemplateFile;
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$mainTemplateFile = self::getTemplateFileByType($identifier, 'main');
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if($mainTemplateFile) return $mainTemplateFile;
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return false;
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}
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/**
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* @param string $identifier A template name without '.ss' extension or path
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* @param string $type The template type, either "main", "Includes" or "Layout"
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* @return string Full system path to a template file
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*/
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public static function getTemplateFileByType($identifier, $type) {
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global $_TEMPLATE_MANIFEST;
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if(self::current_theme() && isset($_TEMPLATE_MANIFEST[$identifier]['themes'][self::current_theme()][$type])) {
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return $_TEMPLATE_MANIFEST[$identifier]['themes'][self::current_theme()][$type];
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} else if(isset($_TEMPLATE_MANIFEST[$identifier][$type])){
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return $_TEMPLATE_MANIFEST[$identifier][$type];
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} else {
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return false;
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}
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}
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/**
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* Used by <% include Identifier %> statements to get the full
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* unparsed content of a template file.
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*
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* @uses getTemplateFile()
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* @param string $identifier A template name without '.ss' extension or path.
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* @return string content of template
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*/
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public static function getTemplateContent($identifier) {
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if(!SSViewer::getTemplateFile($identifier)) {
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return null;
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}
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$content = file_get_contents(SSViewer::getTemplateFile($identifier));
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// $content = "<!-- getTemplateContent() :: identifier: $identifier -->". $content;
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// Adds an i18n namespace to all _t(...) calls without an existing one
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// to avoid confusion when using the include in different contexts.
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// Entities without a namespace are deprecated, but widely used.
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$content = ereg_replace('<' . '% +_t\((\'([^\.\']*)\'|"([^\."]*)")(([^)]|\)[^ ]|\) +[^% ])*)\) +%' . '>', '<?= _t(\''. $identifier . '.ss' . '.\\2\\3\'\\4) ?>', $content);
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// Remove UTF-8 byte order mark
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// This is only necessary if you don't have zend-multibyte enabled.
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if(substr($content, 0,3) == pack("CCC", 0xef, 0xbb, 0xbf)) {
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$content = substr($content, 3);
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}
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return $content;
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}
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/**
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* @ignore
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*/
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static private $flushed = false;
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/**
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* Clears all parsed template files in the cache folder.
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*
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* Can only be called once per request (there may be multiple SSViewer instances).
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*/
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static function flush_template_cache() {
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if (!self::$flushed) {
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$dir = dir(TEMP_FOLDER);
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while (false !== ($file = $dir->read())) {
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if (strstr($file, '.cache')) { unlink(TEMP_FOLDER.'/'.$file); }
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}
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self::$flushed = true;
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}
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}
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/**
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* The process() method handles the "meat" of the template processing.
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* It takes care of caching the output (via {@link SS_Cache}),
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* as well as replacing the special "$Content" and "$Layout"
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* placeholders with their respective subtemplates.
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* The method injects extra HTML in the header via {@link Requirements::includeInHTML()}.
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*
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* Note: You can call this method indirectly by {@link ViewableData->renderWith()}.
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*
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* @param ViewableData $item
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* @param SS_Cache $cache Optional cache backend
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* @return String Parsed template output.
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|
*/
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public function process($item, $cache = null) {
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SSViewer::$topLevel[] = $item;
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if (!$cache) $cache = SS_Cache::factory('cacheblock');
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if(isset($this->chosenTemplates['main'])) {
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|
$template = $this->chosenTemplates['main'];
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} else {
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$template = $this->chosenTemplates[ reset($dummy = array_keys($this->chosenTemplates)) ];
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}
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if(isset($_GET['debug_profile'])) Profiler::mark("SSViewer::process", " for $template");
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$cacheFile = TEMP_FOLDER . "/.cache" . str_replace(array('\\','/',':'), '.', Director::makeRelative(realpath($template)));
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|
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$lastEdited = filemtime($template);
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|
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if(!file_exists($cacheFile) || filemtime($cacheFile) < $lastEdited || isset($_GET['flush'])) {
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|
if(isset($_GET['debug_profile'])) Profiler::mark("SSViewer::process - compile", " for $template");
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|
|
$content = file_get_contents($template);
|
|
$content = SSViewer::parseTemplateContent($content, $template);
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|
|
$fh = fopen($cacheFile,'w');
|
|
fwrite($fh, $content);
|
|
fclose($fh);
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|
|
if(isset($_GET['debug_profile'])) Profiler::unmark("SSViewer::process - compile", " for $template");
|
|
}
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|
|
|
|
if(isset($_GET['showtemplate']) && !Director::isLive()) {
|
|
$lines = file($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>";
|
|
}
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|
|
|
// Makes the rendered sub-templates available on the parent item,
|
|
// through $Content and $Layout placeholders.
|
|
foreach(array('Content', 'Layout') as $subtemplate) {
|
|
if(isset($this->chosenTemplates[$subtemplate])) {
|
|
$subtemplateViewer = new SSViewer($this->chosenTemplates[$subtemplate]);
|
|
$item = $item->customise(array(
|
|
$subtemplate => $subtemplateViewer->process($item, $cache)
|
|
));
|
|
}
|
|
}
|
|
|
|
$scope = new SSViewer_DataPresenter($item, array('I18NNamespace' => basename($template)));
|
|
$val = "";
|
|
|
|
include($cacheFile);
|
|
|
|
$output = Requirements::includeInHTML($template, $val);
|
|
|
|
array_pop(SSViewer::$topLevel);
|
|
|
|
if(isset($_GET['debug_profile'])) Profiler::unmark("SSViewer::process", " for $template");
|
|
|
|
// If we have our crazy base tag, then fix # links referencing the current page.
|
|
if($this->rewriteHashlinks && self::$options['rewriteHashlinks']) {
|
|
if(strpos($output, '<base') !== false) {
|
|
if(SSViewer::$options['rewriteHashlinks'] === 'php') {
|
|
$thisURLRelativeToBase = "<?php echo \$_SERVER['REQUEST_URI']; ?>";
|
|
} else {
|
|
$thisURLRelativeToBase = Director::makeRelative(Director::absoluteURL($_SERVER['REQUEST_URI']));
|
|
}
|
|
$output = preg_replace('/(<a[^>]+href *= *)"#/i', '\\1"' . $thisURLRelativeToBase . '#', $output);
|
|
}
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Execute the given template, passing it the given data.
|
|
* Used by the <% include %> template tag to process templates.
|
|
*/
|
|
static function execute_template($template, $data) {
|
|
$v = new SSViewer($template);
|
|
return $v->process($data);
|
|
}
|
|
|
|
static function parseTemplateContent($content, $template="") {
|
|
return SSTemplateParser::compileString($content, $template, Director::isDev() && self::$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 $this->chosenTemplates;
|
|
}
|
|
|
|
/**
|
|
* @param string $type "Layout" or "main"
|
|
* @param string $file Full system path to the template file
|
|
*/
|
|
public function setTemplateFile($type, $file) {
|
|
$this->chosenTemplates[$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 $contentGeneratedSoFar The content of the template generated so far; it should contain
|
|
* the DOCTYPE declaration.
|
|
*/
|
|
static function get_base_tag($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 sapphire
|
|
* @subpackage view
|
|
*/
|
|
class SSViewer_FromString extends SSViewer {
|
|
protected $content;
|
|
|
|
public function __construct($content) {
|
|
$this->content = $content;
|
|
}
|
|
|
|
public function process($item, $cache = null) {
|
|
$template = SSViewer::parseTemplateContent($this->content, "string sha1=".sha1($this->content));
|
|
|
|
$tmpFile = tempnam(TEMP_FOLDER,"");
|
|
$fh = fopen($tmpFile, 'w');
|
|
fwrite($fh, $template);
|
|
fclose($fh);
|
|
|
|
if(isset($_GET['showtemplate']) && $_GET['showtemplate']) {
|
|
$lines = file($tmpFile);
|
|
echo "<h2>Template: $tmpFile</h2>";
|
|
echo "<pre>";
|
|
foreach($lines as $num => $line) {
|
|
echo str_pad($num+1,5) . htmlentities($line, ENT_COMPAT, 'UTF-8');
|
|
}
|
|
echo "</pre>";
|
|
}
|
|
|
|
$scope = new SSViewer_DataPresenter($item);
|
|
$val = "";
|
|
$valStack = array();
|
|
|
|
$cache = SS_Cache::factory('cacheblock');
|
|
|
|
include($tmpFile);
|
|
unlink($tmpFile);
|
|
|
|
|
|
return $val;
|
|
}
|
|
}
|