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pdf_text.php
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Thu, Sep 25, 6:24 PM

pdf_text.php
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<?php
/**
* @version $Id: pdf_text.php 14244 2011-03-16 20:53:41Z alex $
* @package In-Portal
* @copyright Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/
defined('FULL_PATH') or die('restricted access!');
class kPDFTextElement extends kPDFElement {
protected $Data;
public $Ascent;
public $Descent;
public $Gap;
public $ContentMinWidth;
public $ContentMaxWidht;
function __construct($data='', $node, $helper)
{
parent::__construct($node, $helper);
$this->SetData($data, 0);
}
function SetData($data)
{
$this->Data = $data;
}
function Init()
{
parent::Init();
$this->SetCSSProperty('display', 'inline');
}
function ComputeCSSProperties()
{
parent::ComputeCSSProperties();
// http://manual.prod.intechnic.lv/css21/text.html#q8
$whitespace = str_replace('-', '', $this->GetCSSProperty('white-space')); // remove "-" to avoid confusion
if ($whitespace == 'normal' || $whitespace == 'nowrap' || $whitespace == 'preline') {
$this->Data = preg_replace('/[\n]{1}[\t\\r ]{1}|[\t\\r ]{1}[\n]{1}/', "\n", $this->Data);
}
if ($whitespace == 'pre' || $whitespace == 'prewrap') {
$this->Data = preg_replace('/ /', '&nbsp;', $this->Data);
}
if ($whitespace == 'normal' || $whitespace == 'nowrap') {
$this->Data = preg_replace('/[\r\n]/', ' ', $this->Data);
}
if ($whitespace == 'normal' || $whitespace == 'nowrap' || $whitespace == 'preline') {
$this->Data = preg_replace('/\t/', ' ', $this->Data);
$this->Data = preg_replace('/ [ ]+/', ' ', $this->Data);
}
$transform = $this->GetCSSProperty('text-transform');
if ($transform == 'uppercase') {
$this->Data = strtoupper($this->Data);
}
if ($transform == 'lowercase') {
$this->Data = strtolower($this->Data);
}
if ($transform == 'capitalize') {
$this->Data = ucwords($this->Data);
}
}
function CheckDimensions()
{
$font_size = $this->GetCSSProperty('font-size');
$this->Helper->PDF->SetFont( $this->GetCSSProperty('font-family'), $font_size, $this->GetCSSProperty('font-weight'), $this->GetCSSProperty('font-style'), $this->GetCSSProperty('font-variant'));
$this->Ascent = $this->Helper->PDF->GetAscent();
$this->Descent = -$this->Helper->PDF->GetDescent(); // ((-$font->getDescent() / $units) * $size);
$this->Gap = $this->Helper->PDF->GetLineGap(); // (($font->getLineGap() / $units) * $size);
// proportionally fit ascent & descent into font-size. Wiered why they are greater...
if ($this->Ascent + $this->Descent > $font_size) {
$this->Ascent = $this->Ascent/($this->Ascent+$this->Descent)*$font_size;
$this->Descent = $this->Descent/($this->Ascent+$this->Descent)*$font_size;
}
if ($this->Helper->DimensionsMode == kPDFHelper::DM_SKIP) {
return ;
}
if ($this->Node->Name == 'BR') {
$this->ContentHeight = $this->Ascent + $this->Descent + $this->Gap;
$this->SetCSSProperty('height', $this->ContentHeight);
$this->NextLine('');
$this->GetLineBox()->Closed();
return ;
}
$whitespace = str_replace('-', '', $this->GetCSSProperty('white-space')); // remove "-" to avoid confusion
if (!$this->Data) {
parent::CheckDimensions();
return;
}
$this->Wrap2($whitespace);
$this->GetLineBox()->Closed();
parent::CheckDimensions();
}
function CalcMinMaxContentWidth()
{
$font_size = $this->GetCSSProperty('font-size');
$this->Helper->PDF->SetFont( $this->GetCSSProperty('font-family'), $font_size, $this->GetCSSProperty('font-weight'), $this->GetCSSProperty('font-style'), $this->GetCSSProperty('font-variant'));
$data = $this->Data;
$this->MaxContentWidth = ceil($this->Helper->PDF->GetStringWidth($data));
$words = preg_split('/([ \[\]\+\(\)]{1})/u', $data, null, PREG_SPLIT_NO_EMPTY);
$min_w = $this->MaxContentWidth;
foreach ($words as $word) {
$word_w = ceil($this->Helper->PDF->GetStringWidth($word));
if ($word_w < $min_w) {
$min_w = $word_w;
}
}
$this->MinContentWidth = $min_w;
parent::CalcMinMaxContentWidth();
}
function Wrap2($whitespace) {
$start = $this->GetLineBox()->CurX;
$data = $this->Data;
if ($this->Parent->FirstChild === $this && ($whitespace == 'normal' || $whitespace == 'nowrap' || $whitespace == 'preline')) {
$data = ltrim($data);
}
$words = preg_split('/([ \[\]\+\(\)]{1})/u', $data, null, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
$words_count = count($words);
$i = 0;
$elem_w = 0;
$max_width = $this->GetLineBox()->GetCSSProperty('width');
$line_break = false;
while ($i < $words_count) {
$word_w = $this->Helper->PDF->GetStringWidth($words[$i]);
if ( (floor($max_width - $start - $elem_w - $word_w) < 0) && ($i > 0 || $start > 0) ) {
$line_break = true;
break;
}
$elem_w += $word_w;
$i++;
}
// remove space at the end of line
// @todo Find a way to detect a space at the end of last line, which is NOT wrapped
// otherwise right-aligned blocks will have a space at the end of last line
if ( ($i > 0 && $words[$i-1]) == ' ' && $line_break &&
($whitespace == 'normal' || $whitespace == 'nowrap' || $whitespace == 'preline')
) {
$i--;
$elem_w -= $this->Helper->PDF->GetStringWidth($words[$i]);
array_splice($words, $i, 1);
}
$this->Data = join( array_splice($words, 0, $i) ); //$i here is the number of last word (starting with 0) + 1, so it's fine for splice
if (!$this->Data) { // nothing fitted on current line
$this->Ascent = 0;
$this->Descent = 0;
$this->Gap = 0;
$this->NextLine(join( $words ));
}
else {
$h = $this->Ascent + $this->Descent + $this->Gap;
$elem = $this;
if (preg_match_all('/( )/', $this->Data, $regs, PREG_PATTERN_ORDER)) {
$spacers = count($regs[1]);
}
else {
$spacers = 0;
}
do {
$elem->SetCSSProperty('width', $elem->GetCSSProperty('width') + $elem_w);
$elem->Spacers = $elem->Spacers + $spacers;
$elem->ContentHeight = $h;
$elem->SetCSSProperty('height', $h);
$elem = $elem->Parent;
} while ($elem && $elem->GetDisplayLevel() == 'inline');
$elem->Spacers += $spacers;
$this->GetLineBox()->CurX = $start + $elem_w;
if ($i < $words_count) {
$this->NextLine(join( $words ));
}
}
}
function GetFollowingSiblings()
{
$cur_line = $this->GetLineBox();
$elem = $this;
$cur_pos = 0;
do {
$cur_pos = $elem->Position;
$elem = $elem->Parent;
} while ( $elem && !($elem instanceof kPDFLine) );
return $cur_line->RemoveChildren($cur_pos+1);
}
function CreateNextLine()
{
$cur_line = $this->GetLineBox();
$cur_line->Closed();
if ($this->Node->Name != 'BR') $cur_line->LastLine = false;
return $cur_line->Parent->AddChild( new kPDFLine($cur_line->Parent->Node, $this->Helper), true, $cur_line);
}
function NextLine($words)
{
$removed = $this->GetFollowingSiblings();
$next_line = $this->CreateNextLine();
if ($words) {
$new_elem = $next_line->AddChild( new kPDFTextElement( $words, $this->Node, $this->Helper ));
$new_elem->Closed();
}
foreach ($removed as $elem) {
$next_line->AddChild( $elem, false ); //don't init
}
}
function DrawAt($page, $x, $y, $spacer_w=0)
{
$page->SetLineWidth(0.1);
$y += $this->Ascent; //finding baseline
$this->Helper->PDF->SetFont( $this->GetCSSProperty('font-family'), $this->GetCSSProperty('font-size'), $this->GetCSSProperty('font-weight'), $this->GetCSSProperty('font-style'), $this->GetCSSProperty('font-variant'));
if ($color = $this->GetCSSProperty('color')) {
$page->SetFillColor($color);
}
if (defined('PDF_DEBUG_NO_TEXT')) return ;
if ($spacer_w == 0) {
$data = preg_replace('/\xA0/u', ' ', $this->Data);
$page->drawText($data, $x, $y);
}
else {
$spacer_w += $page->GetStringWidth(' ');
$words = explode(' ', $this->Data);
foreach ($words as $word) {
$word = preg_replace('/\xA0/u', ' ', $word);
$page->drawText($word, $x, $y);
$x += $page->GetStringWidth($word);
$x += $spacer_w;
}
}
$this->CurX = $x;
}
}

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