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<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @author Brian Sweeney <eclecticgeek@gmail.com>
* @author Fabien Ménager <fabien.menager@gmail.com>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
/**
* Decorates Frame objects for text layout
*
* @access private
* @package dompdf
*/
class Text_Frame_Decorator extends Frame_Decorator {
// protected members
protected $_text_spacing;
// buggy DOMText::splitText (PHP < 5.2.7)
public static $_buggy_splittext;
function __construct(Frame $frame, DOMPDF $dompdf) {
if ( !$frame->is_text_node() )
throw new DOMPDF_Exception("Text_Decorator can only be applied to #text nodes.");
parent::__construct($frame, $dompdf);
$this->_text_spacing = null;
}
//........................................................................
function reset() {
parent::reset();
$this->_text_spacing = null;
}
//........................................................................
// Accessor methods
function get_text_spacing() { return $this->_text_spacing; }
function get_text() {
// FIXME: this should be in a child class (and is incorrect)
// if ( $this->_frame->get_style()->content !== "normal" ) {
// $this->_frame->get_node()->data = $this->_frame->get_style()->content;
// $this->_frame->get_style()->content = "normal";
// }
// pre_r("---");
// $style = $this->_frame->get_style();
// var_dump($text = $this->_frame->get_node()->data);
// var_dump($asc = utf8_decode($text));
// for ($i = 0; $i < strlen($asc); $i++)
// pre_r("$i: " . $asc[$i] . " - " . ord($asc[$i]));
// pre_r("width: " . Font_Metrics::get_text_width($text, $style->font_family, $style->font_size));
return $this->_frame->get_node()->data;
}
//........................................................................
// Vertical margins & padding do not apply to text frames
// http://www.w3.org/TR/CSS21/visudet.html#inline-non-replaced:
//
// The vertical padding, border and margin of an inline, non-replaced box
// start at the top and bottom of the content area, not the
// 'line-height'. But only the 'line-height' is used to calculate the
// height of the line box.
function get_margin_height() {
// This function is called in add_frame_to_line() and is used to
// determine the line height, so we actually want to return the
// 'line-height' property, not the actual margin box
$style = $this->get_parent()->get_style();
$font = $style->font_family;
$size = $style->font_size;
/*
pre_r('-----');
pre_r($style->line_height);
pre_r($style->font_size);
pre_r(Font_Metrics::get_font_height($font, $size));
pre_r(($style->line_height / $size) * Font_Metrics::get_font_height($font, $size));
*/
return ($style->line_height / ( $size > 0 ? $size : 1 )) * Font_Metrics::get_font_height($font, $size);
}
function get_padding_box() {
$pb = $this->_frame->get_padding_box();
$pb[3] = $pb["h"] = $this->_frame->get_style()->height;
return $pb;
}
//........................................................................
// Set method
function set_text_spacing($spacing) {
$style = $this->_frame->get_style();
$this->_text_spacing = $spacing;
$char_spacing = $style->length_in_pt($style->letter_spacing);
// Re-adjust our width to account for the change in spacing
$style->width = Font_Metrics::get_text_width($this->get_text(), $style->font_family, $style->font_size, $spacing, $char_spacing);
}
//........................................................................
// Recalculate the text width
function recalculate_width() {
$style = $this->get_style();
$text = $this->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);
return $style->width = Font_Metrics::get_text_width($text, $font, $size, $word_spacing, $char_spacing);
}
//........................................................................
// Text manipulation methods
// split the text in this frame at the offset specified. The remaining
// text is added a sibling frame following this one and is returned.
function split_text($offset) {
if ( $offset == 0 )
return null;
if ( self::$_buggy_splittext ) {
// workaround to solve DOMText::spliText() bug parsing multibyte strings
$node = $this->_frame->get_node();
$txt0 = $node->substringData(0, $offset);
$txt1 = $node->substringData($offset, mb_strlen($node->textContent)-1);
$node->replaceData(0, mb_strlen($node->textContent), $txt0);
$split = $node->parentNode->appendChild(new DOMText($txt1));
}
else {
$split = $this->_frame->get_node()->splitText($offset);
}
$deco = $this->copy($split);
$p = $this->get_parent();
$p->insert_child_after($deco, $this, false);
if ( $p instanceof Inline_Frame_Decorator )
$p->split($deco);
return $deco;
}
//........................................................................
function delete_text($offset, $count) {
$this->_frame->get_node()->deleteData($offset, $count);
}
//........................................................................
function set_text($text) {
$this->_frame->get_node()->data = $text;
}
}
Text_Frame_Decorator::$_buggy_splittext = PHP_VERSION_ID < 50207;
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