/var/www/hkosl.com/littleark/webadmin/libraies/dompdf/dompdf/src/FrameReflower/Text.php


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<?php
/**
 * @package dompdf
 * @link    http://dompdf.github.com/
 * @author  Benj Carson <benjcarson@digitaljunkies.ca>
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */
namespace Dompdf\FrameReflower;

use 
Dompdf\FrameDecorator\Block as BlockFrameDecorator;
use 
Dompdf\FrameDecorator\Text as TextFrameDecorator;
use 
Dompdf\FontMetrics;

/**
 * Reflows text frames.
 *
 * @package dompdf
 */
class Text extends AbstractFrameReflower
{

    
/**
     * @var BlockFrameDecorator
     */
    
protected $_block_parent// Nearest block-level ancestor

    /**
     * @var TextFrameDecorator
     */
    
protected $_frame;

    public static 
$_whitespace_pattern "/[ \t\r\n\f]+/u";

    
/**
     * @var FontMetrics
     */
    
private $fontMetrics;

    
/**
     * @param TextFrameDecorator $frame
     * @param FontMetrics $fontMetrics
     */
    
public function __construct(TextFrameDecorator $frameFontMetrics $fontMetrics)
    {
        
parent::__construct($frame);
        
$this->setFontMetrics($fontMetrics);
    }

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

    
protected function _collapse_white_space($text)
    {
        
//$text = $this->_frame->get_text();
//     if ( $this->_block_parent->get_current_line_box->w == 0 )
//       $text = ltrim($text, " \n\r\t");
        
return preg_replace(self::$_whitespace_pattern" "$text);
    }

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

    
protected function _line_break($text)
    {
        
$style $this->_frame->get_style();
        
$size $style->font_size;
        
$font $style->font_family;
        
$current_line $this->_block_parent->get_current_line_box();

        
// Determine the available width
        
$line_width $this->_frame->get_containing_block("w");
        
$current_line_width $current_line->left $current_line->$current_line->right;

        
$available_width $line_width $current_line_width;

        
// Account for word-spacing
        
$word_spacing $style->length_in_pt($style->word_spacing);
        
$char_spacing $style->length_in_pt($style->letter_spacing);

        
// Determine the frame width including margin, padding & border
        
$text_width $this->getFontMetrics()->getTextWidth($text$font$size$word_spacing$char_spacing);
        
$mbp_width =
            
$style->length_in_pt(array($style->margin_left,
                
$style->border_left_width,
                
$style->padding_left,
                
$style->padding_right,
                
$style->border_right_width,
                
$style->margin_right), $line_width);

        
$frame_width $text_width $mbp_width;

// Debugging:
//    Helpers::pre_r("Text: '" . htmlspecialchars($text). "'");
//    Helpers::pre_r("width: " .$frame_width);
//    Helpers::pre_r("textwidth + delta: $text_width + $mbp_width");
//    Helpers::pre_r("font-size: $size");
//    Helpers::pre_r("cb[w]: " .$line_width);
//    Helpers::pre_r("available width: " . $available_width);
//    Helpers::pre_r("current line width: " . $current_line_width);

//     Helpers::pre_r($words);

        
if ($frame_width <= $available_width)
            return 
false;

        
// split the text into words
        
$words preg_split('/([\s-]+)/u'$text, -1PREG_SPLIT_DELIM_CAPTURE);
        
$wc count($words);

        
// Determine the split point
        
$width 0;
        
$str "";
        
reset($words);

        
// @todo support <shy>, <wbr>
        
for ($i 0$i $wc$i += 2) {
            
$word $words[$i] . (isset($words[$i 1]) ? $words[$i 1] : "");
            
$word_width $this->getFontMetrics()->getTextWidth($word$font$size$word_spacing$char_spacing);
            if (
$width $word_width $mbp_width $available_width)
                break;

            
$width += $word_width;
            
$str .= $word;
        }

        
$break_word = ($style->word_wrap === "break-word");

        
// The first word has overflowed.   Force it onto the line
        
if ($current_line_width == && $width == 0) {

            
$s "";
            
$last_width 0;

            if (
$break_word) {
                for (
$j 0$j strlen($word); $j++) {
                    
$s .= $word[$j];
                    
$_width $this->getFontMetrics()->getTextWidth($s$font$size$word_spacing$char_spacing);
                    if (
$_width $available_width) {
                        break;
                    }

                    
$last_width $_width;
                }
            }

            if (
$break_word && $last_width 0) {
                
$width += $last_width;
                
$str .= substr($s0, -1);
            } else {
                
$width += $word_width;
                
$str .= $word;
            }
        }

        
$offset mb_strlen($str);

// More debugging:
//     var_dump($str);
//     print_r("Width: ". $width);
//     print_r("Offset: " . $offset);

        
return $offset;

    }

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

    
protected function _newline_break($text)
    {

        if ((
$i mb_strpos($text"\n")) === false)
            return 
false;

        return 
$i 1;

    }

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

    
protected function _layout_line()
    {
        
$frame $this->_frame;
        
$style $frame->get_style();
        
$text $frame->get_text();
        
$size $style->font_size;
        
$font $style->font_family;

        
// Determine the text height
        
$style->height $this->getFontMetrics()->getFontHeight($font$size);

        
$split false;
        
$add_line false;

        
// Handle text transform:
        // http://www.w3.org/TR/CSS21/text.html#propdef-text-transform
        
switch (strtolower($style->text_transform)) {
            default:
                break;
            case 
"capitalize":
                
$text mb_convert_case($textMB_CASE_TITLE);
                break;
            case 
"uppercase":
                
$text mb_convert_case($textMB_CASE_UPPER);
                break;
            case 
"lowercase":
                
$text mb_convert_case($textMB_CASE_LOWER);
                break;
        }

        
// Handle white-space property:
        // http://www.w3.org/TR/CSS21/text.html#propdef-white-space
        
switch ($style->white_space) {

            default:
            case 
"normal":
                
$frame->set_text($text $this->_collapse_white_space($text));
                if (
$text == "")
                    break;

                
$split $this->_line_break($text);
                break;

            case 
"pre":
                
$split $this->_newline_break($text);
                
$add_line $split !== false;
                break;

            case 
"nowrap":
                
$frame->set_text($text $this->_collapse_white_space($text));
                break;

            case 
"pre-wrap":
                
$split $this->_newline_break($text);

                if ((
$tmp $this->_line_break($text)) !== false) {
                    
$add_line $split $tmp;
                    
$split min($tmp$split);
                } else
                    
$add_line true;

                break;

            case 
"pre-line":
                
// Collapse white-space except for \n
                
$frame->set_text($text preg_replace("/[ \t]+/u"" "$text));

                if (
$text == "")
                    break;

                
$split $this->_newline_break($text);

                if ((
$tmp $this->_line_break($text)) !== false) {
                    
$add_line $split $tmp;
                    
$split min($tmp$split);
                } else
                    
$add_line true;

                break;

        }

        
// Handle degenerate case
        
if ($text === "")
            return;

        if (
$split !== false) {

            
// Handle edge cases
            
if ($split == && $text === " ") {
                
$frame->set_text("");
                return;
            }

            if (
$split == 0) {

                
// Trim newlines from the beginning of the line
                //$this->_frame->set_text(ltrim($text, "\n\r"));

                
$this->_block_parent->add_line();
                
$frame->position();

                
// Layout the new line
                
$this->_layout_line();

            } else if (
$split mb_strlen($frame->get_text())) {
                
// split the line if required
                
$frame->split_text($split);

                
$t $frame->get_text();

                
// Remove any trailing newlines
                
if ($split && $t[$split 1] === "\n" && !$frame->is_pre())
                    
$frame->set_text(mb_substr($t0, -1));

                
// Do we need to trim spaces on wrapped lines? This might be desired, however, we
                // can't trim the lines here or the layout will be affected if trimming the line
                // leaves enough space to fit the next word in the text stream (because pdf layout
                // is performed elsewhere).
                /*if (!$this->_frame->get_prev_sibling() && !$this->_frame->get_next_sibling()) {
                  $t = $this->_frame->get_text();
                  $this->_frame->set_text( trim($t) );
                }*/
            
}

            if (
$add_line) {
                
$this->_block_parent->add_line();
                
$frame->position();
            }

        } else {

            
// Remove empty space from start and end of line, but only where there isn't an inline sibling
            // and the parent node isn't an inline element with siblings
            // FIXME: Include non-breaking spaces?
            
$t $frame->get_text();
            
$parent $frame->get_parent();
            
$is_inline_frame get_class($parent) === 'Inline_Frame_Decorator';

            if ((!
$is_inline_frame && !$frame->get_next_sibling()) /* ||
          ( $is_inline_frame && !$parent->get_next_sibling())*/
            
) { // fails <b>BOLD <u>UNDERLINED</u></b> becomes <b>BOLD<u>UNDERLINED</u></b>
                
$t rtrim($t);
            }

            if ((!
$is_inline_frame && !$frame->get_prev_sibling()) /* ||
          ( $is_inline_frame && !$parent->get_prev_sibling())*/
            
) { //  <span><span>A<span>B</span> C</span></span> fails (the whitespace is removed)
                
$t ltrim($t);
            }

            
$frame->set_text($t);

        }

        
// Set our new width
        
$width $frame->recalculate_width();
    }

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

    
function reflow(BlockFrameDecorator $block null)
    {
        
$frame $this->_frame;
        
$page $frame->get_root();
        
$page->check_forced_page_break($this->_frame);

        if (
$page->is_full())
            return;

        
$this->_block_parent /*isset($block) ? $block : */
            
$frame->find_block_parent();

        
// Left trim the text if this is the first text on the line and we're
        // collapsing white space
//     if ( $this->_block_parent->get_current_line()->w == 0 &&
//          ($frame->get_style()->white_space !== "pre" ||
//           $frame->get_style()->white_space !== "pre-wrap") ) {
//       $frame->set_text( ltrim( $frame->get_text() ) );
//     }

        
$frame->position();

        
$this->_layout_line();

        if (
$block) {
            
$block->add_frame_to_line($frame);
        }
    }

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

    // Returns an array(0 => min, 1 => max, "min" => min, "max" => max) of the
    // minimum and maximum widths of this frame
    
function get_min_max_width()
    {
        
/*if ( !is_null($this->_min_max_cache)  )
          return $this->_min_max_cache;*/
        
$frame $this->_frame;
        
$style $frame->get_style();
        
$this->_block_parent $frame->find_block_parent();
        
$line_width $frame->get_containing_block("w");

        
$str $text $frame->get_text();
        
$size $style->font_size;
        
$font $style->font_family;

        
$word_spacing $style->length_in_pt($style->word_spacing);
        
$char_spacing $style->length_in_pt($style->letter_spacing);

        switch (
$style->white_space) {

            default:
            case 
"normal":
                
$str preg_replace(self::$_whitespace_pattern" "$str);
            case 
"pre-wrap":
            case 
"pre-line":

                
// Find the longest word (i.e. minimum length)

                // This technique (using arrays & an anonymous function) is actually
                // faster than doing a single-pass character by character scan.  Heh,
                // yes I took the time to bench it ;)
                
$words array_flip(preg_split("/[\s-]+/u"$str, -1PREG_SPLIT_DELIM_CAPTURE));
                
$root $this;
                
array_walk($words, function(&$val$str) use ($font$size$word_spacing$char_spacing$root) {
                    
$val $root->getFontMetrics()->getTextWidth($str$font$size$word_spacing$char_spacing);
                });

                
arsort($words);
                
$min reset($words);
                break;

            case 
"pre":
                
$lines array_flip(preg_split("/\n/u"$str));
                
$root $this;
                
array_walk($lines, function(&$val$str) use ($font$size$word_spacing$char_spacing$root) {
                    
$val $root->getFontMetrics()->getTextWidth($str$font$size$word_spacing$char_spacing);
                });

                
arsort($lines);
                
$min reset($lines);
                break;

            case 
"nowrap":
                
$min $this->getFontMetrics()->getTextWidth($this->_collapse_white_space($str), $font$size$word_spacing$char_spacing);
                break;

        }

        switch (
$style->white_space) {

            default:
            case 
"normal":
            case 
"nowrap":
                
$str preg_replace(self::$_whitespace_pattern" "$text);
                break;

            case 
"pre-line":
                
//XXX: Is this correct?
                
$str preg_replace("/[ \t]+/u"" "$text);

            case 
"pre-wrap":
                
// Find the longest word (i.e. minimum length)
                
$lines array_flip(preg_split("/\n/"$text));
                
$root $this;
                
array_walk($lines, function(&$val$str) use ($font$size$word_spacing$char_spacing$root) {
                    
$val $root->getFontMetrics()->getTextWidth($str$font$size$word_spacing$char_spacing);
                });
                
arsort($lines);
                
reset($lines);
                
$str key($lines);
                break;

        }

        
$max $this->getFontMetrics()->getTextWidth($str$font$size$word_spacing$char_spacing);

        
$delta $style->length_in_pt(array($style->margin_left,
            
$style->border_left_width,
            
$style->padding_left,
            
$style->padding_right,
            
$style->border_right_width,
            
$style->margin_right), $line_width);
        
$min += $delta;
        
$max += $delta;

        return 
$this->_min_max_cache = array($min$max"min" => $min"max" => $max);

    }

    
/**
     * @param FontMetrics $fontMetrics
     * @return $this
     */
    
public function setFontMetrics(FontMetrics $fontMetrics)
    {
        
$this->fontMetrics $fontMetrics;
        return 
$this;
    }

    
/**
     * @return FontMetrics
     */
    
public function getFontMetrics()
    {
        return 
$this->fontMetrics;
    }
}