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<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
/**
* Decorates frames for block layout
*
* @access private
* @package dompdf
*/
class Block_Frame_Decorator extends Frame_Decorator {
/**
* Current line index
*
* @var int
*/
protected $_cl;
/**
* The block's line boxes
*
* @var Line_Box[]
*/
protected $_line_boxes;
function __construct(Frame $frame, DOMPDF $dompdf) {
parent::__construct($frame, $dompdf);
$this->_line_boxes = array(new Line_Box($this));
$this->_cl = 0;
}
function reset() {
parent::reset();
$this->_line_boxes = array(new Line_Box($this));
$this->_cl = 0;
}
/**
* @return Line_Box
*/
function get_current_line_box() {
return $this->_line_boxes[$this->_cl];
}
/**
* @return integer
*/
function get_current_line_number() {
return $this->_cl;
}
/**
* @return Line_Box[]
*/
function get_line_boxes() {
return $this->_line_boxes;
}
/**
* @param integer $i
*/
function clear_line($i) {
if ( isset($this->_line_boxes[$i]) ) {
unset($this->_line_boxes[$i]);
}
}
/**
* @param Frame $frame
*/
function add_frame_to_line(Frame $frame) {
if ( !$frame->is_in_flow() ) {
return;
}
$style = $frame->get_style();
$frame->set_containing_line($this->_line_boxes[$this->_cl]);
/*
// Adds a new line after a block, only if certain conditions are met
if ((($frame instanceof Inline_Frame_Decorator && $frame->get_node()->nodeName !== "br") ||
$frame instanceof Text_Frame_Decorator && trim($frame->get_text())) &&
($frame->get_prev_sibling() && $frame->get_prev_sibling()->get_style()->display === "block" &&
$this->_line_boxes[$this->_cl]->w > 0 )) {
$this->maximize_line_height( $style->length_in_pt($style->line_height), $frame );
$this->add_line();
// Add each child of the inline frame to the line individually
foreach ($frame->get_children() as $child)
$this->add_frame_to_line( $child );
}
else*/
// Handle inline frames (which are effectively wrappers)
if ( $frame instanceof Inline_Frame_Decorator ) {
// Handle line breaks
if ( $frame->get_node()->nodeName === "br" ) {
$this->maximize_line_height( $style->length_in_pt($style->line_height), $frame );
$this->add_line(true);
}
return;
}
// Trim leading text if this is an empty line. Kinda a hack to put it here,
// but what can you do...
if ( $this->get_current_line_box()->w == 0 &&
$frame->is_text_node() &&
!$frame->is_pre() ) {
$frame->set_text( ltrim($frame->get_text()) );
$frame->recalculate_width();
}
$w = $frame->get_margin_width();
if ( $w == 0 ) {
return;
}
// Debugging code:
/*
pre_r("\n<h3>Adding frame to line:</h3>");
// pre_r("Me: " . $this->get_node()->nodeName . " (" . spl_object_hash($this->get_node()) . ")");
// pre_r("Node: " . $frame->get_node()->nodeName . " (" . spl_object_hash($frame->get_node()) . ")");
if ( $frame->is_text_node() )
pre_r('"'.$frame->get_node()->nodeValue.'"');
pre_r("Line width: " . $this->_line_boxes[$this->_cl]->w);
pre_r("Frame: " . get_class($frame));
pre_r("Frame width: " . $w);
pre_r("Frame height: " . $frame->get_margin_height());
pre_r("Containing block width: " . $this->get_containing_block("w"));
*/
// End debugging
$line = $this->_line_boxes[$this->_cl];
if ( $line->left + $line->w + $line->right + $w > $this->get_containing_block("w")) {
$this->add_line();
}
$frame->position();
$current_line = $this->_line_boxes[$this->_cl];
$current_line->add_frame($frame);
if ( $frame->is_text_node() ) {
$current_line->wc += count(preg_split("/\s+/", trim($frame->get_text())));
}
$this->increase_line_width($w);
$this->maximize_line_height($frame->get_margin_height(), $frame);
}
function remove_frames_from_line(Frame $frame) {
// Search backwards through the lines for $frame
$i = $this->_cl;
$j = null;
while ($i >= 0) {
if ( ($j = in_array($frame, $this->_line_boxes[$i]->get_frames(), true)) !== false ) {
break;
}
$i--;
}
if ( $j === false ) {
return;
}
// Remove $frame and all frames that follow
while ($j < count($this->_line_boxes[$i]->get_frames())) {
$frames = $this->_line_boxes[$i]->get_frames();
$f = $frames[$j];
$frames[$j] = null;
unset($frames[$j]);
$j++;
$this->_line_boxes[$i]->w -= $f->get_margin_width();
}
// Recalculate the height of the line
$h = 0;
foreach ($this->_line_boxes[$i]->get_frames() as $f) {
$h = max( $h, $f->get_margin_height() );
}
$this->_line_boxes[$i]->h = $h;
// Remove all lines that follow
while ($this->_cl > $i) {
$this->_line_boxes[ $this->_cl ] = null;
unset($this->_line_boxes[ $this->_cl ]);
$this->_cl--;
}
}
function increase_line_width($w) {
$this->_line_boxes[ $this->_cl ]->w += $w;
}
function maximize_line_height($val, Frame $frame) {
if ( $val > $this->_line_boxes[ $this->_cl ]->h ) {
$this->_line_boxes[ $this->_cl ]->tallest_frame = $frame;
$this->_line_boxes[ $this->_cl ]->h = $val;
}
}
function add_line($br = false) {
// if ( $this->_line_boxes[$this->_cl]["h"] == 0 ) //count($this->_line_boxes[$i]["frames"]) == 0 ||
// return;
$this->_line_boxes[$this->_cl]->br = $br;
$y = $this->_line_boxes[$this->_cl]->y + $this->_line_boxes[$this->_cl]->h;
$new_line = new Line_Box($this, $y);
$this->_line_boxes[ ++$this->_cl ] = $new_line;
}
//........................................................................
}
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