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<?php
/**
* Classes to create relation schema in SVG format.
*/
declare(strict_types=1);
namespace PhpMyAdmin\Plugins\Schema\Svg;
use PhpMyAdmin\Core;
use PhpMyAdmin\ResponseRenderer;
use XMLWriter;
use function intval;
use function is_int;
use function sprintf;
use function strlen;
/**
* This Class inherits the XMLwriter class and
* helps in developing structure of SVG Schema Export
*
* @see https://www.php.net/manual/en/book.xmlwriter.php
*/
class Svg extends XMLWriter
{
/** @var string */
public $title = '';
/** @var string */
public $author = 'phpMyAdmin';
/** @var string */
public $font = 'Arial';
/** @var int */
public $fontSize = 12;
/**
* Upon instantiation This starts writing the RelationStatsSvg XML document
*
* @see XMLWriter::openMemory()
* @see XMLWriter::setIndent()
* @see XMLWriter::startDocument()
*/
public function __construct()
{
$this->openMemory();
/*
* Set indenting using three spaces,
* so output is formatted
*/
$this->setIndent(true);
$this->setIndentString(' ');
/*
* Create the XML document
*/
$this->startDocument('1.0', 'UTF-8');
$this->startDtd('svg', '-//W3C//DTD SVG 1.1//EN', 'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd');
$this->endDtd();
}
/**
* Set document title
*
* @param string $value sets the title text
*/
public function setTitle($value): void
{
$this->title = $value;
}
/**
* Set document author
*
* @param string $value sets the author
*/
public function setAuthor($value): void
{
$this->author = $value;
}
/**
* Set document font
*
* @param string $value sets the font e.g Arial, Sans-serif etc
*/
public function setFont(string $value): void
{
$this->font = $value;
}
/**
* Get document font
*
* @return string returns the font name
*/
public function getFont(): string
{
return $this->font;
}
/**
* Set document font size
*
* @param int $value sets the font size in pixels
*/
public function setFontSize(int $value): void
{
$this->fontSize = $value;
}
/**
* Get document font size
*
* @return int returns the font size
*/
public function getFontSize(): int
{
return $this->fontSize;
}
/**
* Starts RelationStatsSvg Document
*
* svg document starts by first initializing svg tag
* which contains all the attributes and namespace that needed
* to define the svg document
*
* @see XMLWriter::startElement()
* @see XMLWriter::writeAttribute()
*
* @param int $width total width of the RelationStatsSvg document
* @param int $height total height of the RelationStatsSvg document
* @param int $x min-x of the view box
* @param int $y min-y of the view box
*/
public function startSvgDoc($width, $height, $x = 0, $y = 0): void
{
$this->startElement('svg');
if (! is_int($width)) {
$width = intval($width);
}
if (! is_int($height)) {
$height = intval($height);
}
if ($x != 0 || $y != 0) {
$this->writeAttribute('viewBox', sprintf('%d %d %d %d', $x, $y, $width, $height));
}
$this->writeAttribute('width', ($width - $x) . 'px');
$this->writeAttribute('height', ($height - $y) . 'px');
$this->writeAttribute('xmlns', 'http://www.w3.org/2000/svg');
$this->writeAttribute('version', '1.1');
}
/**
* Ends RelationStatsSvg Document
*
* @see XMLWriter::endElement()
* @see XMLWriter::endDocument()
*/
public function endSvgDoc(): void
{
$this->endElement();
$this->endDocument();
}
/**
* output RelationStatsSvg Document
*
* svg document prompted to the user for download
* RelationStatsSvg document saved in .svg extension and can be
* easily changeable by using any svg IDE
*
* @see XMLWriter::startElement()
* @see XMLWriter::writeAttribute()
*
* @param string $fileName file name
*/
public function showOutput($fileName): void
{
//ob_get_clean();
$output = $this->flush();
ResponseRenderer::getInstance()->disable();
Core::downloadHeader(
$fileName,
'image/svg+xml',
strlen($output)
);
print $output;
}
/**
* Draws RelationStatsSvg elements
*
* SVG has some predefined shape elements like rectangle & text
* and other elements who have x,y co-ordinates are drawn.
* specify their width and height and can give styles too.
*
* @see XMLWriter::startElement()
* @see XMLWriter::writeAttribute()
* @see XMLWriter::text()
* @see XMLWriter::endElement()
*
* @param string $name RelationStatsSvg element name
* @param int $x The x attr defines the left position of the element
* (e.g. x="0" places the element 0 pixels from the
* left of the browser window)
* @param int $y The y attribute defines the top position of the
* element (e.g. y="0" places the element 0 pixels
* from the top of the browser window)
* @param int|string $width The width attribute defines the width the element
* @param int|string $height The height attribute defines the height the element
* @param string|null $text The text attribute defines the text the element
* @param string $styles The style attribute defines the style the element
* styles can be defined like CSS styles
*/
public function printElement(
$name,
$x,
$y,
$width = '',
$height = '',
?string $text = '',
$styles = ''
): void {
$this->startElement($name);
$this->writeAttribute('width', (string) $width);
$this->writeAttribute('height', (string) $height);
$this->writeAttribute('x', (string) $x);
$this->writeAttribute('y', (string) $y);
$this->writeAttribute('style', (string) $styles);
if (isset($text)) {
$this->writeAttribute('font-family', (string) $this->font);
$this->writeAttribute('font-size', $this->fontSize . 'px');
$this->text($text);
}
$this->endElement();
}
/**
* Draws RelationStatsSvg Line element
*
* RelationStatsSvg line element is drawn for connecting the tables.
* arrows are also drawn by specify its start and ending
* co-ordinates
*
* @see XMLWriter::startElement()
* @see XMLWriter::writeAttribute()
* @see XMLWriter::endElement()
*
* @param string $name RelationStatsSvg element name i.e line
* @param int $x1 Defines the start of the line on the x-axis
* @param int $y1 Defines the start of the line on the y-axis
* @param int $x2 Defines the end of the line on the x-axis
* @param int $y2 Defines the end of the line on the y-axis
* @param string $styles The style attribute defines the style the element
* styles can be defined like CSS styles
*/
public function printElementLine($name, $x1, $y1, $x2, $y2, $styles): void
{
$this->startElement($name);
$this->writeAttribute('x1', (string) $x1);
$this->writeAttribute('y1', (string) $y1);
$this->writeAttribute('x2', (string) $x2);
$this->writeAttribute('y2', (string) $y2);
$this->writeAttribute('style', (string) $styles);
$this->endElement();
}
}