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icingaweb2/library/vendor/dompdf/include/text_frame_reflower.cls.php
Matthias Jentsch 124b42c9f1 Remove tcpdf library and use dompdf instead 
Remove tcpdf because of improper CSS support and use Dompdf instead, to be able
to generate pdfs that look similar to the html views

refs #4356
2014-02-12 12:11:01 +01:00

434 lines
13 KiB
PHP
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<?php
/**
* @package dompdf
* @link http://www.dompdf.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
* @version $Id: text_frame_reflower.cls.php 462 2012-01-29 22:44:23Z fabien.menager $
*/
/**
* Reflows text frames.
*
* @access private
* @package dompdf
*/
class Text_Frame_Reflower extends Frame_Reflower {
/**
* @var Block_Frame_Decorator
*/
protected $_block_parent; // Nearest block-level ancestor
/**
* @var Text_Frame_Decorator
*/
protected $_frame;
public static $_whitespace_pattern = "/[ \t\r\n\f]+/u";
function __construct(Text_Frame_Decorator $frame) { parent::__construct($frame); }
//........................................................................
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->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;
}
$break_word = ($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];
$_width = Font_Metrics::get_text_width($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:
// pre_var_dump($str);
// pre_r("Width: ". $width);
// pre_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 = Font_Metrics::get_font_height( $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": $text = mb_convert_case($text, MB_CASE_TITLE); break;
case "uppercase": $text = mb_convert_case($text, MB_CASE_UPPER); break;
case "lowercase": $text = mb_convert_case($text, MB_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 == 0 && $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 > 1 && $t[$split-1] === "\n" && !$frame->is_pre() )
$frame->set_text( mb_substr($t, 0, -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())) {
$t = rtrim($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(Frame_Decorator $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, -1, PREG_SPLIT_DELIM_CAPTURE));
array_walk($words, create_function('&$val,$str',
'$val = Font_Metrics::get_text_width($str, "'.addslashes($font).'", '.$size.', '.$word_spacing.', '.$char_spacing.');'));
arsort($words);
$min = reset($words);
break;
case "pre":
$lines = array_flip(preg_split("/\n/u", $str));
array_walk($lines, create_function('&$val,$str',
'$val = Font_Metrics::get_text_width($str, "'.addslashes($font).'", '.$size.', '.$word_spacing.', '.$char_spacing.');'));
arsort($lines);
$min = reset($lines);
break;
case "nowrap":
$min = Font_Metrics::get_text_width($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/", $text));
array_walk($lines, create_function('&$val,$str',
'$val = Font_Metrics::get_text_width($str, "'.$font.'", '.$size.', '.$word_spacing.', '.$char_spacing.');'));
arsort($lines);
reset($lines);
$str = key($lines);
break;
}
$max = Font_Metrics::get_text_width($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);
}
}
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