TbForm.php

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<?php
class TbForm extends CForm {
        
        public $inputElementClass = 'TbFormInputElement';

        public $buttonElementClass = 'TbFormButtonElement';

        public $activeForm = array('class' => 'TbActiveForm');

        public function renderButtons() {
                
                $output = '';
                foreach ($this->getButtons() as $button) {
                        $output .= $this->renderElement($button);
                }

                if ($output !== '' && $this->activeFormWidget->type !== TbActiveForm::TYPE_INLINE) {
                        $output = "<div class=\"form-actions\">\n" . $output . "</div>\n";
                }

                return $output;
        }

        public function renderBegin() {
                
                if (!($this->getParent() instanceof self) and !isset($this->activeForm['class'])) {
                        $this->activeForm['class'] = 'TbActiveForm';
                }

                return parent::renderBegin();
        }

        public function renderElement($element) {
                
                if (is_string($element)) {
                        if (($e = $this[$element]) === null && ($e = $this->getButtons()->itemAt($element)) === null)
                                return $element;
                        else
                                $element = $e;
                }

                if ($element->getVisible()) {
                        if ($element instanceof TbFormInputElement) {
                                if ($element->type === 'hidden') {
                                        return "<div style=\"visibility:hidden\">\n" . $element->render() . "</div>\n";
                                } else {
                                        return $element->render();
                                }
                        } elseif ($element instanceof TbFormButtonElement) {
                                return $element->render() . "\n";
                        } else {
                                return $element->render();
                        }
                }
                return '';
        }
}