mirror of
https://github.com/smarty-php/smarty.git
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252 lines
8.1 KiB
PHP
252 lines
8.1 KiB
PHP
<?php
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/**
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* Inheritance Runtime Methods processBlock, endChild, init
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*
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* @package Smarty
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* @subpackage PluginsInternal
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* @author Uwe Tews
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**/
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class Smarty_Internal_Runtime_Inheritance
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{
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/**
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* State machine
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* - 0 idle next extends will create a new inheritance tree
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* - 1 processing child template
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* - 2 wait for next inheritance template
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* - 3 assume parent template, if child will loaded goto state 1
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* a call to a sub template resets the state to 0
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*
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* @var int
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*/
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public $state = 0;
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/**
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* Array of root child {block} objects
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*
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* @var Smarty_Internal_Block[]
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*/
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public $childRoot = array();
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/**
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* inheritance template nesting level
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*
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* @var int
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*/
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public $inheritanceLevel = 0;
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/**
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* inheritance template index
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*
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* @var int
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*/
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public $tplIndex = -1;
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/**
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* Array of template source objects
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*
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* @var Smarty_Template_Source[]
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*/
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public $sources = array();
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/**
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* Stack of source objects while executing block code
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*
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* @var Smarty_Template_Source[]
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*/
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public $sourceStack = array();
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/**
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* Initialize inheritance
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*
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* @param \Smarty_Internal_Template $tpl template object of caller
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* @param bool $initChild if true init for child template
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* @param array $blockNames outer level block name
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*/
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public function init(Smarty_Internal_Template $tpl, $initChild, $blockNames = array())
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{
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// if called while executing parent template it must be a sub-template with new inheritance root
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if ($initChild && $this->state === 3 && (strpos($tpl->template_resource, 'extendsall') === false)) {
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$tpl->inheritance = new Smarty_Internal_Runtime_Inheritance();
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$tpl->inheritance->init($tpl, $initChild, $blockNames);
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return;
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}
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++$this->tplIndex;
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$this->sources[ $this->tplIndex ] = $tpl->source;
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// start of child sub template(s)
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if ($initChild) {
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$this->state = 1;
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if (!$this->inheritanceLevel) {
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//grab any output of child templates
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ob_start();
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}
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++$this->inheritanceLevel;
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// $tpl->startRenderCallbacks[ 'inheritance' ] = array($this, 'subTemplateStart');
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// $tpl->endRenderCallbacks[ 'inheritance' ] = array($this, 'subTemplateEnd');
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}
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// if state was waiting for parent change state to parent
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if ($this->state === 2) {
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$this->state = 3;
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}
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}
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/**
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* End of child template(s)
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* - if outer level is reached flush output buffer and switch to wait for parent template state
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*
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* @param \Smarty_Internal_Template $tpl
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* @param null|string $template optional name of inheritance parent template
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* @param null|string $uid uid of inline template
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* @param null|string $func function call name of inline template
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*
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* @throws \Exception
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* @throws \SmartyException
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*/
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public function endChild(Smarty_Internal_Template $tpl, $template = null, $uid = null, $func = null)
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{
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--$this->inheritanceLevel;
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if (!$this->inheritanceLevel) {
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ob_end_clean();
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$this->state = 2;
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}
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if (isset($template) && (($tpl->parent->_isTplObj() && $tpl->parent->source->type !== 'extends')
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|| $tpl->smarty->extends_recursion)
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) {
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$tpl->_subTemplateRender(
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$template,
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$tpl->cache_id,
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$tpl->compile_id,
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$tpl->caching ? 9999 : 0,
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$tpl->cache_lifetime,
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array(),
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2,
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false,
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$uid,
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$func
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);
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}
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}
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/**
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* Smarty_Internal_Block constructor.
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* - if outer level {block} of child template ($state === 1) save it as child root block
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* - otherwise process inheritance and render
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*
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* @param \Smarty_Internal_Template $tpl
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* @param $className
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* @param string $name
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* @param int|null $tplIndex index of outer level {block} if nested
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*
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* @throws \SmartyException
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*/
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public function instanceBlock(Smarty_Internal_Template $tpl, $className, $name, $tplIndex = null)
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{
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$block = new $className($name, isset($tplIndex) ? $tplIndex : $this->tplIndex);
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if (isset($this->childRoot[ $name ])) {
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$block->child = $this->childRoot[ $name ];
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}
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if ($this->state === 1) {
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$this->childRoot[ $name ] = $block;
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return;
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}
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// make sure we got child block of child template of current block
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while ($block->child && $block->tplIndex <= $block->child->tplIndex) {
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$block->child = $block->child->child;
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}
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$this->process($tpl, $block);
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}
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/**
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* Goto child block or render this
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*
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* @param \Smarty_Internal_Template $tpl
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* @param \Smarty_Internal_Block $block
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* @param \Smarty_Internal_Block|null $parent
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*
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* @throws \SmartyException
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*/
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public function process(
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Smarty_Internal_Template $tpl,
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Smarty_Internal_Block $block,
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Smarty_Internal_Block $parent = null
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) {
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if ($block->hide && !isset($block->child)) {
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return;
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}
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if (isset($block->child) && $block->child->hide && !isset($block->child->child)) {
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$block->child = null;
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}
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$block->parent = $parent;
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if ($block->append && !$block->prepend && isset($parent)) {
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$this->callParent($tpl, $block, '\'{block append}\'');
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}
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if ($block->callsChild || !isset($block->child) || ($block->child->hide && !isset($block->child->child))) {
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$this->callBlock($block, $tpl);
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} else {
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$this->process($tpl, $block->child, $block);
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}
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if ($block->prepend && isset($parent)) {
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$this->callParent($tpl, $block, '{block prepend}');
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if ($block->append) {
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if ($block->callsChild || !isset($block->child)
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|| ($block->child->hide && !isset($block->child->child))
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) {
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$this->callBlock($block, $tpl);
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} else {
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$this->process($tpl, $block->child, $block);
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}
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}
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}
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$block->parent = null;
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}
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/**
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* Render child on \$smarty.block.child
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*
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* @param \Smarty_Internal_Template $tpl
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* @param \Smarty_Internal_Block $block
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*
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* @return null|string block content
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* @throws \SmartyException
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*/
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public function callChild(Smarty_Internal_Template $tpl, Smarty_Internal_Block $block)
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{
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if (isset($block->child)) {
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$this->process($tpl, $block->child, $block);
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}
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}
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/**
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* Render parent block on \$smarty.block.parent or {block append/prepend}
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*
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* @param \Smarty_Internal_Template $tpl
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* @param \Smarty_Internal_Block $block
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* @param string $tag
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*
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* @return null|string block content
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* @throws \SmartyException
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*/
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public function callParent(Smarty_Internal_Template $tpl, Smarty_Internal_Block $block, $tag)
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{
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if (isset($block->parent)) {
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$this->callBlock($block->parent, $tpl);
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} else {
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throw new SmartyException("inheritance: illegal '{$tag}' used in child template '{$tpl->inheritance->sources[$block->tplIndex]->filepath}' block '{$block->name}'");
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}
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}
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/**
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* render block
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*
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* @param \Smarty_Internal_Block $block
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* @param \Smarty_Internal_Template $tpl
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*/
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public function callBlock(Smarty_Internal_Block $block, Smarty_Internal_Template $tpl)
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{
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$this->sourceStack[] = $tpl->source;
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$tpl->source = $this->sources[ $block->tplIndex ];
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$block->callBlock($tpl);
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$tpl->source = array_pop($this->sourceStack);
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}
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}
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