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| author | Joas Schilling <nickvergessen@gmx.de> | 2014-07-25 17:45:35 +0200 |
|---|---|---|
| committer | Joas Schilling <nickvergessen@gmx.de> | 2014-07-25 17:48:53 +0200 |
| commit | 831e9116ab46cd608065f4f664544c449ee95192 (patch) | |
| tree | 7c773870fc0f81f9c390a4a0ebe847b87a957b30 /phpBB/phpbb/template/context.php | |
| parent | 8064d2931fd5d64acb9e941f107668f4e7b20e92 (diff) | |
| download | forums-831e9116ab46cd608065f4f664544c449ee95192.tar forums-831e9116ab46cd608065f4f664544c449ee95192.tar.gz forums-831e9116ab46cd608065f4f664544c449ee95192.tar.bz2 forums-831e9116ab46cd608065f4f664544c449ee95192.tar.xz forums-831e9116ab46cd608065f4f664544c449ee95192.zip | |
[ticket/12892] Do not set S_NUM_ROWS when adding a row to a template loop
We do not set S_NUM_ROWS while adding a row, to reduce the complexity
If we would set it on adding, each subsequent adding would cause
n modifications, resulting in a O(n!) complexity, rather then O(n)
PHPBB3-12892
Diffstat (limited to 'phpBB/phpbb/template/context.php')
| -rw-r--r-- | phpBB/phpbb/template/context.php | 78 |
1 files changed, 58 insertions, 20 deletions
diff --git a/phpBB/phpbb/template/context.php b/phpBB/phpbb/template/context.php index 0a32879943..4ee48205c8 100644 --- a/phpBB/phpbb/template/context.php +++ b/phpBB/phpbb/template/context.php @@ -34,6 +34,11 @@ class context */ private $rootref; + /** + * @var bool + */ + private $num_rows_is_set; + public function __construct() { $this->clear(); @@ -46,6 +51,7 @@ class context { $this->tpldata = array('.' => array(0 => array())); $this->rootref = &$this->tpldata['.'][0]; + $this->num_rows_is_set = false; } /** @@ -95,10 +101,59 @@ class context // returning a reference directly is not // something php is capable of doing $ref = &$this->tpldata; + + if (!$this->num_rows_is_set) + { + /* + * We do not set S_NUM_ROWS while adding a row, to reduce the complexity + * If we would set it on adding, each subsequent adding would cause + * n modifications, resulting in a O(n!) complexity, rather then O(n) + */ + foreach ($ref as $loop_name => &$loop_data) + { + if ($loop_name === '.') + { + continue; + } + + $this->set_num_rows($loop_data); + } + $this->num_rows_is_set = true; + } + return $ref; } /** + * Set S_NUM_ROWS for each row in this template block + * + * @param array $loop_data + */ + protected function set_num_rows(&$loop_data) + { + $s_num_rows = sizeof($loop_data); + foreach ($loop_data as &$mod_block) + { + foreach ($mod_block as $sub_block_name => &$sub_block) + { + // If the key name is lowercase and the data is an array, + // it could be a template loop. So we set the S_NUM_ROWS there + // aswell. + if ($sub_block_name === strtolower($sub_block_name) && is_array($sub_block)) + { + $this->set_num_rows($sub_block); + } + } + + // Check whether we are inside a block before setting the variable + if (isset($mod_block['S_BLOCK_NAME'])) + { + $mod_block['S_NUM_ROWS'] = $s_num_rows; + } + } + } + + /** * Returns a reference to template root scope. * * This function is public so that template renderer may invoke it. @@ -123,6 +178,7 @@ class context */ public function assign_block_vars($blockname, array $vararray) { + $this->num_rows_is_set = false; if (strpos($blockname, '.') !== false) { // Nested block. @@ -160,13 +216,6 @@ class context // We're adding a new iteration to this block with the given // variable assignments. $str[$blocks[$blockcount]][] = $vararray; - $s_num_rows = sizeof($str[$blocks[$blockcount]]); - - // Set S_NUM_ROWS - foreach ($str[$blocks[$blockcount]] as &$mod_block) - { - $mod_block['S_NUM_ROWS'] = $s_num_rows; - } } else { @@ -192,13 +241,6 @@ class context // Add a new iteration to this block with the variable assignments we were given. $this->tpldata[$blockname][] = $vararray; - $s_num_rows = sizeof($this->tpldata[$blockname]); - - // Set S_NUM_ROWS - foreach ($this->tpldata[$blockname] as &$mod_block) - { - $mod_block['S_NUM_ROWS'] = $s_num_rows; - } } return true; @@ -250,6 +292,7 @@ class context */ public function alter_block_array($blockname, array $vararray, $key = false, $mode = 'insert') { + $this->num_rows_is_set = false; if (strpos($blockname, '.') !== false) { // Nested block. @@ -349,12 +392,6 @@ class context $block[$key] = $vararray; $block[$key]['S_ROW_COUNT'] = $block[$key]['S_ROW_NUM'] = $key; - // Set S_NUM_ROWS - foreach ($this->tpldata[$blockname] as &$mod_block) - { - $mod_block['S_NUM_ROWS'] = sizeof($this->tpldata[$blockname]); - } - return true; } @@ -382,6 +419,7 @@ class context */ public function destroy_block_vars($blockname) { + $this->num_rows_is_set = false; if (strpos($blockname, '.') !== false) { // Nested block. |