app/code/community/Aoe/TemplateHints/Helper/BlockInfo.php
public function getBlockPath(Mage_Core_Block_Abstract $block) {
        $blockPath = array();
        $step = $block->getParentBlock();
	$i = 0;
        while ($i++ < 20 && $step instanceof Mage_Core_Block_Abstract) {
            $blockPath[] = $this->getBlockInfo($step, false);
            $step = $step->getParentBlock();
        }
        return $blockPath;
    }
public function getBlockPath(Mage_Core_Block_Abstract $block) {
        $blockPath = array();
        $step = $block->getParentBlock();
	$i = 0;
        while ($i++ < 20 && $step instanceof Mage_Core_Block_Abstract) {
            $blockPath[] = $this->getBlockInfo($step, false);
            $step = $step->getParentBlock();
        }
        return $blockPath;
    }
Get path information of a block

@param Mage_Core_Block_Abstract $block
@return string
@author Fabrizio Branca
@since 2011-01-24