PHP Block_Frame_Decorator::get_current_line方法代码示例

 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();
     // 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;
     // split the text into words
     $words = preg_split('/([\\s-]+)/u', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
     $wc = count($words);
     // 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
     $text_width = Font_Metrics::get_text_width($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 + $mbp_width;
     // Debugging:
     //    pre_r("Text: '" . htmlspecialchars($text). "'");
     //    pre_r("width: " .$frame_width);
     //    pre_r("textwidth + delta: $text_width + $mbp_width");
     //    pre_r("font-size: $size");
     //    pre_r("cb[w]: " .$line_width);
     //    pre_r("available width: " . $available_width);
     //    pre_r("current line width: " . $current_line_width);
     //     pre_r($words);
     if ($frame_width <= $available_width) {
         return false;
     }
     // 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] : "");
         $word_width = Font_Metrics::get_text_width($word, $font, $size, $word_spacing, $char_spacing);
         if ($width + $word_width + $mbp_width > $available_width) {
             break;
         }
         $width += $word_width;
         $str .= $word;
     }
     // The first word has overflowed.   Force it onto the line
     if ($current_line_width == 0 && $width == 0) {
         $width += $word_width;
         $str .= $word;
     }
     $offset = mb_strlen($str);
     // More debugging:
     //     pre_var_dump($str);
     //     pre_r("Width: ". $width);
     //     pre_r("Offset: " . $offset);
     return $offset;
 }

 function reflow(Frame_Decorator $block = null)
 {
     // Check if a page break is forced
     $page = $this->_frame->get_root();
     $page->check_forced_page_break($this->_frame);
     // Bail if the page is full
     if ($page->is_full()) {
         return;
     }
     // Generated content
     $this->_set_content();
     // Collapse margins if required
     $this->_collapse_margins();
     $style = $this->_frame->get_style();
     $cb = $this->_frame->get_containing_block();
     if ($style->counter_increment && ($increment = $style->counter_increment) !== "none") {
         $this->_frame->increment_counter($increment);
     }
     if ($style->position === "fixed") {
         $cb = $this->_frame->get_root()->get_containing_block();
     }
     // Determine the constraints imposed by this frame: calculate the width
     // of the content area:
     list($w, $left_margin, $right_margin, $left, $right) = $this->_calculate_restricted_width();
     // Store the calculated properties
     $style->width = $w . "pt";
     $style->margin_left = $left_margin . "pt";
     $style->margin_right = $right_margin . "pt";
     $style->left = $left . "pt";
     $style->right = $right . "pt";
     // Update the position
     $this->_frame->position();
     list($x, $y) = $this->_frame->get_position();
     // Adjust the first line based on the text-indent property
     $indent = $style->length_in_pt($style->text_indent, $cb["w"]);
     $this->_frame->increase_line_width($indent);
     // Determine the content edge
     $top = $style->length_in_pt(array($style->margin_top, $style->padding_top, $style->border_top_width), $cb["h"]);
     $bottom = $style->length_in_pt(array($style->border_bottom_width, $style->margin_bottom, $style->padding_bottom), $cb["h"]);
     $cb_x = $x + $left_margin + $style->length_in_pt(array($style->border_left_width, $style->padding_left), $cb["w"]);
     $cb_y = $y + $top;
     $cb_h = $cb["h"] + $cb["y"] - $bottom - $cb_y;
     // Set the y position of the first line in this block
     $this->_frame->set_current_line($cb_y);
     $floating_children = array();
     // Set the containing blocks and reflow each child
     foreach ($this->_frame->get_children() as $child) {
         // Bail out if the page is full
         if ($page->is_full()) {
             break;
         }
         // Floating siblings
         if (DOMPDF_ENABLE_CSS_FLOAT && count($floating_children)) {
             $offset_left = 0;
             $offset_right = 0;
             // We need to reflow the child to know its initial x position
             $child->set_containing_block($cb_x, $cb_y, $w, $cb_h);
             $child->reflow($this->_frame);
             $current_line = $this->_frame->get_current_line();
             foreach ($floating_children as $child_key => $floating_child) {
                 $float = $floating_child->get_style()->float;
                 $floating_width = $floating_child->get_margin_width();
                 $floating_x = $floating_child->get_position("x");
                 if ($float === "left") {
                     if ($current_line["left"] + $child->get_position("x") > $floating_x + $floating_width) {
                         continue;
                     }
                 } else {
                     if ($current_line["left"] + $child->get_position("x") + $child->get_margin_width() < $w - $floating_width - $current_line["right"]) {
                         continue;
                     }
                 }
                 // If the child is still shifted by the floating element
                 if ($floating_child->get_position("y") + $floating_child->get_margin_height() > $current_line["y"]) {
                     if ($float === "left") {
                         $offset_left += $floating_width;
                     } else {
                         $offset_right += $floating_width;
                     }
                 } else {
                     unset($floating_children[$child_key]);
                 }
             }
             if ($offset_left) {
                 $this->_frame->set_current_line(array("left" => $offset_left));
             }
             if ($offset_right) {
                 $this->_frame->set_current_line(array("right" => $offset_right));
             }
         }
         $child->set_containing_block($cb_x, $cb_y, $w, $cb_h);
         $child->reflow($this->_frame);
         // Don't add the child to the line if a page break has occurred
         if ($page->check_page_break($child)) {
             break;
         }
         $child_style = $child->get_style();
         if (DOMPDF_ENABLE_CSS_FLOAT && $child_style->float !== "none") {
             $floating_children[] = $child;
             // Remove next frame's beginning whitespace
//.........这里部分代码省略.........