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Primer commit del sistema avantika sin cambios

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nickpons666
2026-01-06 19:42:24 -06:00
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pdf/include/text_renderer.cls.php Executable file
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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.dompdf.com/
*
* @link http://www.dompdf.com/
* @copyright 2004 Benj Carson
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @contributor Helmut Tischer <htischer@weihenstephan.org>
* @package dompdf
*
* Changes
* @contributor Helmut Tischer <htischer@weihenstephan.org>
* @version dompdf_trunk_with_helmut_mods.20090528
* - fix text decoration positions according to font metrics
* @version 20090610
* - better accuracy on using different renderer as cpdf, added comments
*/
/* $Id: text_renderer.cls.php 357 2011-01-30 20:56:46Z fabien.menager $ */
/**
* Renders text frames
*
* @access private
* @package dompdf
*/
class Text_Renderer extends Abstract_Renderer {
const DECO_THICKNESS = 0.02; // Thickness of underline. Screen: 0.08, print: better less, e.g. 0.04
//Tweaking if $base and $descent are not accurate.
//Check method_exists( $this->_canvas, "get_cpdf" )
//- For cpdf these can and must stay 0, because font metrics are used directly.
//- For other renderers, if different values are wanted, separate the parameter sets.
// But $size and $size-$height seem to be accurate enough
const UNDERLINE_OFFSET = 0.0; // Relative to bottom of text, as fraction of height.
const OVERLINE_OFFSET = 0.0; // Relative to top of text
const LINETHROUGH_OFFSET = 0.0; // Relative to centre of text.
const DECO_EXTENSION = 0.0; // How far to extend lines past either end, in pt
//........................................................................
function render(Frame $frame) {
$text = $frame->get_text();
if ( trim($text) === "" )
return;
$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"] );
$font = $style->font_family;
$size = $frame_font_size = $style->font_size;
$height = $style->height;
$word_spacing = $frame->get_text_spacing() + $style->length_in_pt($style->word_spacing);
$char_spacing = $style->length_in_pt($style->letter_spacing);
$width = $style->width;
/*$text = str_replace(
array("{PAGE_NUM}"),
array($this->_canvas->get_page_number()),
$text
);*/
$this->_canvas->text($x, $y, $text,
$font, $size,
$style->color, $word_spacing, $char_spacing);
$line = $frame->get_containing_line();
// FIXME Instead of using the tallest frame to position,
// the decoration, the text should be well placed
if ( false && $line["tallest_frame"] ) {
$base_frame = $line["tallest_frame"];
$style = $base_frame->get_style();
$size = $style->font_size;
$height = $line["h"] * ($size / $style->line_height);
}
if ( method_exists( $this->_canvas, "get_cpdf" ) ) {
$cpdf = $this->_canvas->get_cpdf();
$fontBBox = $cpdf->fonts[$style->font_family]['FontBBox'];
$base = (($fontBBox[3]*$size)/1000) * 0.90;
$descent = ($fontBBox[1]*$size)/1000;
//print '<pre>Text_Renderer cpdf:'.$base.' '.$descent.' '.$size.'</pre>';
} else {
//Descent is font part below baseline, typically negative. $height is about full height of font box.
//$descent = -$size/6; is less accurate, depends on font family.
// @todo Could we get font info for PDFlib adapter and others ?
$base = $size*1.08;
$descent = $size-$height;
//print '<pre>Text_Renderer other than cpdf:'.$base.' '.$descent.' '.$size.'</pre>';
}
// 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);
if ( ($text_deco = $f->get_style()->text_decoration) === "none" )
continue;
$deco_y = $y; //$line["y"];
$color = $f->get_style()->color;
switch ($text_deco) {
default:
continue;
case "underline":
$deco_y += $base - $descent + $size * (self::UNDERLINE_OFFSET - self::DECO_THICKNESS/2);
break;
case "overline":
$deco_y += $size * (self::OVERLINE_OFFSET + self::DECO_THICKNESS/2);
break;
case "line-through":
$deco_y += $base * 0.7 + $size * self::LINETHROUGH_OFFSET;
break;
}
$dx = 0;
$x1 = $x - self::DECO_EXTENSION;
$x2 = $x + $width + $dx + self::DECO_EXTENSION;
$this->_canvas->line($x1, $deco_y, $x2, $deco_y, $color, $size * self::DECO_THICKNESS);
}
if (DEBUG_LAYOUT && DEBUG_LAYOUT_LINES) {
$text_width = Font_Metrics::get_text_width($text, $font, $frame_font_size);
$this->_debug_layout(array($x, $y, $text_width+($line["wc"]-1)*$word_spacing, $frame_font_size), "orange", array(0.5, 0.5));
}
}
}