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<?php
/**
* DOMPDF - PHP5 HTML to PDF renderer
*
* File: $RCSfile: text_renderer.cls.php,v $
* Created on: 2004-06-01
*
* Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library in the file LICENSE.LGPL; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* Alternatively, you may distribute this software under the terms of the
* PHP License, version 3.0 or later. A copy of this license should have
* been distributed with this file in the file LICENSE.PHP . If this is not
* the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
*
* The latest version of DOMPDF might be available at:
* http://www.digitaljunkies.ca/dompdf
*
* @link http://www.digitaljunkies.ca/dompdf
* @copyright 2004 Benj Carson
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @package dompdf
* @version 0.5.1
*/
/* $Id: text_renderer.cls.php,v 1.5 2006/07/07 21:31:05 benjcarson Exp $ */
/**
* Renders text frames
*
* @access private
* @package dompdf
*/
class Text_Renderer extends Abstract_Renderer {
const UNDERLINE_OFFSET = 0.1; // Relative to bottom of text, as fraction of height
const OVERLINE_OFFSET = 0.25; // Relative to top of text, "
const LINETHROUGH_OFFSET = 0.0; // Relative to centre of text, "
const DECO_EXTENSION = 0.75; // How far to extend lines past either end, in pt
//........................................................................
function render(Frame $frame) {
$style = $frame->get_style();
list($x, $y) = $frame->get_position();
$cb = $frame->get_containing_block();
if ( ($ml = $style->margin_left) == "auto" || $ml == "none" )
$ml = 0;
if ( ($pl = $style->padding_left) == "auto" || $pl == "none" )
$pl = 0;
if ( ($bl = $style->border_left_width) == "auto" || $bl == "none" )
$bl = 0;
$x += $style->length_in_pt( array($ml, $pl, $bl), $cb["w"] );
$text = $frame->get_text();
$font = $style->font_family;
$size = $style->font_size;
$height = $style->height;
$spacing = $frame->get_text_spacing() + $style->word_spacing;
if ( preg_replace("/[\s]+/", "", $text) == "" )
return;
$this->_canvas->text($x, $y, $text,
$font, $size,
$style->color, $spacing);
// Handle text decoration:
// http://www.w3.org/TR/CSS21/text.html#propdef-text-decoration
// Draw all applicable text-decorations. Start with the root and work
// our way down.
$p = $frame;
$stack = array();
while ( $p = $p->get_parent() )
$stack[] = $p;
while ( count($stack) > 0 ) {
$f = array_pop($stack);
$deco_y = $y;
if ( ($text_deco = $f->get_style()->text_decoration) === "none" )
continue;
$color = $f->get_style()->color;
switch ($text_deco) {
default:
continue;
case "underline":
$deco_y += $height * (1 + self::UNDERLINE_OFFSET);
break;
case "overline":
$deco_y += $height * self::OVERLINE_OFFSET;
break;
case "line-through":
$deco_y -= $height * ( 0.25 + self::LINETHROUGH_OFFSET);
break;
}
$dx = 0;
$x1 = $x - self::DECO_EXTENSION;
$x2 = $x + $style->width + $dx + self::DECO_EXTENSION;
$this->_canvas->line($x1, $deco_y, $x2, $deco_y, $color, 0.5);
}
}
}
?>