Ejemplo n.º 1
0
 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->w + $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, -1, PREG_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 == 0 && $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;
             $str .= substr($s, 0, -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;
 }
Ejemplo n.º 2
0
 /**
  * Determine current frame width based on contents
  *
  * @return float
  */
 public function calculate_auto_width()
 {
     return $this->_frame->recalculate_width();
 }