source: branches/2.2/filemanager/tp/dompdf/include/text_renderer.cls.php @ 3019

Revision 3019, 5.6 KB checked in by amuller, 14 years ago (diff)

Ticket #1135 - Corrigindo CSS e adicionando filemanager

Line 
1<?php
2/**
3 * DOMPDF - PHP5 HTML to PDF renderer
4 *
5 * File: $RCSfile: text_renderer.cls.php,v $
6 * Created on: 2004-06-01
7 *
8 * Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library in the file LICENSE.LGPL; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 * 02111-1307 USA
24 *
25 * Alternatively, you may distribute this software under the terms of the
26 * PHP License, version 3.0 or later.  A copy of this license should have
27 * been distributed with this file in the file LICENSE.PHP .  If this is not
28 * the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
29 *
30 * The latest version of DOMPDF might be available at:
31 * http://www.digitaljunkies.ca/dompdf
32 *
33 * @link http://www.digitaljunkies.ca/dompdf
34 * @copyright 2004 Benj Carson
35 * @author Benj Carson <benjcarson@digitaljunkies.ca>
36 * @contributor Helmut Tischer <htischer@weihenstephan.org>
37 * @package dompdf
38 * @version 0.5.1
39 *
40 * Changes
41 * @contributor Helmut Tischer <htischer@weihenstephan.org>
42 * @version dompdf_trunk_with_helmut_mods.20090528
43 * - fix text decoration positions according to font metrics
44 * @version 20090610
45 * - better accuracy on using different renderer as cpdf, added comments
46 */
47
48/* $Id: text_renderer.cls.php 186 2009-10-19 22:42:06Z eclecticgeek@gmail.com $ */
49/**
50 * Renders text frames
51 *
52 * @access private
53 * @package dompdf
54 */
55class Text_Renderer extends Abstract_Renderer {
56 
57  const DECO_THICKNESS = 0.04;     // Thickness of underline. Screen: 0.08, print: better less, e.g. 0.04
58
59  //Tweaking if $base and $descent are not accurate.
60  //Check method_exists( $this->_canvas, "get_cpdf" )
61  //- For cpdf these can and must stay 0, because font metrics are used directly.
62  //- For other renderers, if different values are wanted, separate the parameter sets.
63  //  But $size and $size-$height seem to be accurate enough
64  const UNDERLINE_OFFSET = 0.0;    // Relative to bottom of text, as fraction of height.
65  const OVERLINE_OFFSET = 0.0;    // Relative to top of text
66  const LINETHROUGH_OFFSET = 0.0; // Relative to centre of text.
67  const DECO_EXTENSION = 0.0;     // How far to extend lines past either end, in pt
68   
69  //........................................................................
70
71  function render(Frame $frame) {
72   
73    $style = $frame->get_style();
74    list($x, $y) = $frame->get_position();
75    $cb = $frame->get_containing_block();
76
77    if ( ($ml = $style->margin_left) == "auto" || $ml == "none" )
78      $ml = 0;
79
80    if ( ($pl = $style->padding_left) == "auto" || $pl == "none" )
81      $pl = 0;
82
83    if ( ($bl = $style->border_left_width) == "auto" || $bl == "none" )
84      $bl = 0;
85
86    $x += $style->length_in_pt( array($ml, $pl, $bl), $cb["w"] );
87
88    $text = $frame->get_text();
89   
90    $font = $style->font_family;
91    $size = $style->font_size;
92    $height = $style->height;   
93    $spacing = $frame->get_text_spacing() + $style->word_spacing;
94
95//     if ( preg_replace("/[\s]+/", "", $text) == "" )
96//       return;
97   
98    $this->_canvas->text($x, $y, $text,
99                         $font, $size,
100                         $style->color, $spacing);
101
102    if ( method_exists( $this->_canvas, "get_cpdf" ) ) {
103      $base = ($this->_canvas->get_cpdf()->fonts[$this->_canvas->get_cpdf()->currentFont]['FontBBox'][3]*$size)/1000;
104      $descent = ($this->_canvas->get_cpdf()->fonts[$this->_canvas->get_cpdf()->currentFont]['FontBBox'][1]*$size)/1000;
105      //print '<pre>Text_Renderer cpdf:'.$base.' '.$descent.' '.$size.'</pre>';
106    } else {
107      //Descent is font part below baseline, typically negative. $height is about full height of font box.
108      //$descent = -$size/6; is less accurate, depends on font family.
109      $base = $size;
110      $descent = $size-$height;
111      //print '<pre>Text_Renderer other than cpdf:'.$base.' '.$descent.' '.$size.'</pre>';
112    }
113   
114    // Handle text decoration:
115    // http://www.w3.org/TR/CSS21/text.html#propdef-text-decoration
116   
117    // Draw all applicable text-decorations.  Start with the root and work
118    // our way down.
119    $p = $frame;
120    $stack = array();
121    while ( $p = $p->get_parent() )
122      $stack[] = $p;
123   
124    while ( count($stack) > 0 ) {
125      $f = array_pop($stack);
126
127      $deco_y = $y;
128      if ( ($text_deco = $f->get_style()->text_decoration) === "none" )
129        continue;
130
131      $color = $f->get_style()->color;
132
133      switch ($text_deco) {
134
135      default:
136        continue;
137
138      case "underline":
139        $deco_y += $base - $descent+ $size * (self::UNDERLINE_OFFSET - self::DECO_THICKNESS/2);
140        break;
141
142      case "overline":
143        $deco_y += $size * (self::OVERLINE_OFFSET + self::DECO_THICKNESS/2);
144        break;
145
146      case "line-through":
147        $deco_y += $base * 0.7 + $size * self::LINETHROUGH_OFFSET;
148        break;
149
150      }
151
152      $dx = 0;
153      $x1 = $x - self::DECO_EXTENSION;
154      $x2 = $x + $style->width + $dx + self::DECO_EXTENSION;
155      $this->_canvas->line($x1, $deco_y, $x2, $deco_y, $color, $size * self::DECO_THICKNESS);
156
157    }
158  }
159
160}
161
162?>
Note: See TracBrowser for help on using the repository browser.