<?php


/**


 * @package dompdf


 * @link    http://dompdf.github.com/


 * @author  Benj Carson <benjcarson@digitaljunkies.ca>


 * @author  Brian Sweeney <eclecticgeek@gmail.com>


 * @author  Fabien Ménager <fabien.menager@gmail.com>


 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License


 */


namespace Dompdf\FrameDecorator;





use Dompdf\Dompdf;


use Dompdf\Frame;


use Dompdf\Exception;





/**


 * Decorates Frame objects for text layout


 *


 * @access  private


 * @package dompdf


 */


class Text extends AbstractFrameDecorator


{





    // protected members


    protected $_text_spacing;





    /**


     * Text constructor.


     * @param Frame $frame


     * @param Dompdf $dompdf


     * @throws Exception


     */


    function __construct(Frame $frame, Dompdf $dompdf)


    {


        if (!$frame->is_text_node()) {


            throw new Exception("Text_Decorator can only be applied to #text nodes.");


        }





        parent::__construct($frame, $dompdf);


        $this->_text_spacing = null;


    }





    function reset()


    {


        parent::reset();


        $this->_text_spacing = null;


    }





    // Accessor methods





    /**


     * @return null


     */


    function get_text_spacing()


    {


        return $this->_text_spacing;


    }





    /**


     * @return string


     */


    function get_text()


    {


        // FIXME: this should be in a child class (and is incorrect)


//    if ( $this->_frame->get_style()->content !== "normal" ) {


//      $this->_frame->get_node()->data = $this->_frame->get_style()->content;


//      $this->_frame->get_style()->content = "normal";


//    }





//      Helpers::pre_r("---");


//      $style = $this->_frame->get_style();


//      var_dump($text = $this->_frame->get_node()->data);


//      var_dump($asc = utf8_decode($text));


//      for ($i = 0; $i < strlen($asc); $i++)


//        Helpers::pre_r("$i: " . $asc[$i] . " - " . ord($asc[$i]));


//      Helpers::pre_r("width: " . $this->_dompdf->getFontMetrics()->getTextWidth($text, $style->font_family, $style->font_size));





        return $this->_frame->get_node()->data;


    }





    //........................................................................





    /**


     * Vertical margins & padding do not apply to text frames


     *


     * http://www.w3.org/TR/CSS21/visudet.html#inline-non-replaced:


     *


     * The vertical padding, border and margin of an inline, non-replaced box


     * start at the top and bottom of the content area, not the


     * 'line-height'. But only the 'line-height' is used to calculate the


     * height of the line box.


     *


     * @return float|int


     */


    function get_margin_height()


    {


        // This function is called in add_frame_to_line() and is used to


        // determine the line height, so we actually want to return the


        // 'line-height' property, not the actual margin box


        $style = $this->get_style();


        $font = $style->font_family;


        $size = $style->font_size;





        /*


        Helpers::pre_r('-----');


        Helpers::pre_r($style->line_height);


        Helpers::pre_r($style->font_size);


        Helpers::pre_r($this->_dompdf->getFontMetrics()->getFontHeight($font, $size));


        Helpers::pre_r(($style->line_height / $size) * $this->_dompdf->getFontMetrics()->getFontHeight($font, $size));


        */





        return ($style->line_height / ($size > 0 ? $size : 1)) * $this->_dompdf->getFontMetrics()->getFontHeight($font, $size);


    }





    /**


     * @return array


     */


    function get_padding_box()


    {


        $style = $this->_frame->get_style();


        $pb = $this->_frame->get_padding_box();


        $pb[3] = $pb["h"] = $style->length_in_pt($style->height);


        return $pb;


    }





    /**


     * @param $spacing


     */


    function set_text_spacing($spacing)


    {


        $style = $this->_frame->get_style();





        $this->_text_spacing = $spacing;


        $char_spacing = (float)$style->length_in_pt($style->letter_spacing);





        // Re-adjust our width to account for the change in spacing


        $style->width = $this->_dompdf->getFontMetrics()->getTextWidth($this->get_text(), $style->font_family, $style->font_size, $spacing, $char_spacing);


    }





    /**


     *  Recalculate the text width


     *


     * @return float


     */


    function recalculate_width()


    {


        $style = $this->get_style();


        $text = $this->get_text();


        $size = $style->font_size;


        $font = $style->font_family;


        $word_spacing = (float)$style->length_in_pt($style->word_spacing);


        $char_spacing = (float)$style->length_in_pt($style->letter_spacing);





        return $style->width = $this->_dompdf->getFontMetrics()->getTextWidth($text, $font, $size, $word_spacing, $char_spacing);


    }





    // Text manipulation methods





    /**


     * split the text in this frame at the offset specified.  The remaining


     * text is added a sibling frame following this one and is returned.


     *


     * @param $offset


     * @return Frame|null


     */


    function split_text($offset)


    {


        if ($offset == 0) {


            return null;


        }





        $split = $this->_frame->get_node()->splitText($offset);


        if ($split === false) {


            return null;


        }


        


        $deco = $this->copy($split);





        $p = $this->get_parent();


        $p->insert_child_after($deco, $this, false);





        if ($p instanceof Inline) {


            $p->split($deco);


        }





        return $deco;


    }





    /**


     * @param $offset


     * @param $count


     */


    function delete_text($offset, $count)


    {


        $this->_frame->get_node()->deleteData($offset, $count);


    }





    /**


     * @param $text


     */


    function set_text($text)


    {


        $this->_frame->get_node()->data = $text;


    }


}


