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<?php
/**
* @package dompdf
* @link https://github.com/dompdf/dompdf
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf\Css;
use Dompdf\Frame;
use Dompdf\Helpers;
/**
* Translates HTML 4.0 attributes into CSS rules
*
* @package dompdf
*/
class AttributeTranslator
{
static $_style_attr = "_html_style_attribute";
// Munged data originally from
// http://www.w3.org/TR/REC-html40/index/attributes.html
// http://www.cs.tut.fi/~jkorpela/html2css.html
private static $__ATTRIBUTE_LOOKUP = [
//'caption' => array ( 'align' => '', ),
'img' => [
'align' => [
'bottom' => 'vertical-align: baseline;',
'middle' => 'vertical-align: middle;',
'top' => 'vertical-align: top;',
'left' => 'float: left;',
'right' => 'float: right;'
],
'border' => 'border: %0.2Fpx solid;',
'height' => '_set_px_height',
'hspace' => 'padding-left: %1$0.2Fpx; padding-right: %1$0.2Fpx;',
'vspace' => 'padding-top: %1$0.2Fpx; padding-bottom: %1$0.2Fpx;',
'width' => '_set_px_width',
],
'table' => [
'align' => [
'left' => 'margin-left: 0; margin-right: auto;',
'center' => 'margin-left: auto; margin-right: auto;',
'right' => 'margin-left: auto; margin-right: 0;'
],
'bgcolor' => 'background-color: %s;',
'border' => '_set_table_border',
'cellpadding' => '_set_table_cellpadding', //'border-spacing: %0.2F; border-collapse: separate;',
'cellspacing' => '_set_table_cellspacing',
'frame' => [
'void' => 'border-style: none;',
'above' => 'border-top-style: solid;',
'below' => 'border-bottom-style: solid;',
'hsides' => 'border-left-style: solid; border-right-style: solid;',
'vsides' => 'border-top-style: solid; border-bottom-style: solid;',
'lhs' => 'border-left-style: solid;',
'rhs' => 'border-right-style: solid;',
'box' => 'border-style: solid;',
'border' => 'border-style: solid;'
],
'rules' => '_set_table_rules',
'width' => 'width: %s;',
],
'hr' => [
'align' => '_set_hr_align', // Need to grab width to set 'left' & 'right' correctly
'noshade' => 'border-style: solid;',
'size' => '_set_hr_size', //'border-width: %0.2F px;',
'width' => 'width: %s;',
],
'div' => [
'align' => 'text-align: %s;',
],
'h1' => [
'align' => 'text-align: %s;',
],
'h2' => [
'align' => 'text-align: %s;',
],
'h3' => [
'align' => 'text-align: %s;',
],
'h4' => [
'align' => 'text-align: %s;',
],
'h5' => [
'align' => 'text-align: %s;',
],
'h6' => [
'align' => 'text-align: %s;',
],
//TODO: translate more form element attributes
'input' => [
'size' => '_set_input_width'
],
'p' => [
'align' => 'text-align: %s;',
],
// 'col' => array(
// 'align' => '',
// 'valign' => '',
// ),
// 'colgroup' => array(
// 'align' => '',
// 'valign' => '',
// ),
'tbody' => [
'align' => '_set_table_row_align',
'valign' => '_set_table_row_valign',
],
'td' => [
'align' => 'text-align: %s;',
'bgcolor' => '_set_background_color',
'height' => 'height: %s;',
'nowrap' => 'white-space: nowrap;',
'valign' => 'vertical-align: %s;',
'width' => 'width: %s;',
],
'tfoot' => [
'align' => '_set_table_row_align',
'valign' => '_set_table_row_valign',
],
'th' => [
'align' => 'text-align: %s;',
'bgcolor' => '_set_background_color',
'height' => 'height: %s;',
'nowrap' => 'white-space: nowrap;',
'valign' => 'vertical-align: %s;',
'width' => 'width: %s;',
],
'thead' => [
'align' => '_set_table_row_align',
'valign' => '_set_table_row_valign',
],
'tr' => [
'align' => '_set_table_row_align',
'bgcolor' => '_set_table_row_bgcolor',
'valign' => '_set_table_row_valign',
],
'body' => [
'background' => 'background-image: url(%s);',
'bgcolor' => '_set_background_color',
'link' => '_set_body_link',
'text' => '_set_color',
],
'br' => [
'clear' => 'clear: %s;',
],
'basefont' => [
'color' => '_set_color',
'face' => 'font-family: %s;',
'size' => '_set_basefont_size',
],
'font' => [
'color' => '_set_color',
'face' => 'font-family: %s;',
'size' => '_set_font_size',
],
'dir' => [
'compact' => 'margin: 0.5em 0;',
],
'dl' => [
'compact' => 'margin: 0.5em 0;',
],
'menu' => [
'compact' => 'margin: 0.5em 0;',
],
'ol' => [
'compact' => 'margin: 0.5em 0;',
'start' => 'counter-reset: -dompdf-default-counter %d;',
'type' => 'list-style-type: %s;',
],
'ul' => [
'compact' => 'margin: 0.5em 0;',
'type' => 'list-style-type: %s;',
],
'li' => [
'type' => 'list-style-type: %s;',
'value' => 'counter-reset: -dompdf-default-counter %d;',
],
'pre' => [
'width' => 'width: %s;',
],
];
protected static $_last_basefont_size = 3;
protected static $_font_size_lookup = [
// For basefont support
-3 => "4pt",
-2 => "5pt",
-1 => "6pt",
0 => "7pt",
1 => "8pt",
2 => "10pt",
3 => "12pt",
4 => "14pt",
5 => "18pt",
6 => "24pt",
7 => "34pt",
// For basefont support
8 => "48pt",
9 => "44pt",
10 => "52pt",
11 => "60pt",
];
/**
* @param Frame $frame
*/
static function translate_attributes(Frame $frame)
{
$node = $frame->get_node();
$tag = $node->nodeName;
if (!isset(self::$__ATTRIBUTE_LOOKUP[$tag])) {
return;
}
$valid_attrs = self::$__ATTRIBUTE_LOOKUP[$tag];
$attrs = $node->attributes;
$style = rtrim($node->getAttribute(self::$_style_attr), "; ");
if ($style != "") {
$style .= ";";
}
foreach ($attrs as $attr => $attr_node) {
if (!isset($valid_attrs[$attr])) {
continue;
}
$value = $attr_node->value;
$target = $valid_attrs[$attr];
// Look up $value in $target, if $target is an array:
if (is_array($target)) {
if (isset($target[$value])) {
$style .= " " . self::_resolve_target($node, $target[$value], $value);
}
} else {
// otherwise use target directly
$style .= " " . self::_resolve_target($node, $target, $value);
}
}
if (!is_null($style)) {
$style = ltrim($style);
$node->setAttribute(self::$_style_attr, $style);
}
}
/**
* @param \DOMNode $node
* @param string $target
* @param string $value
*
* @return string
*/
protected static function _resolve_target(\DOMNode $node, $target, $value)
{
if ($target[0] === "_") {
return self::$target($node, $value);
}
return $value ? sprintf($target, $value) : "";
}
/**
* @param \DOMElement $node
* @param string $new_style
*/
static function append_style(\DOMElement $node, $new_style)
{
$style = rtrim($node->getAttribute(self::$_style_attr), ";");
$style .= $new_style;
$style = ltrim($style, ";");
$node->setAttribute(self::$_style_attr, $style);
}
/**
* @param \DOMNode $node
*
* @return \DOMNodeList|\DOMElement[]
*/
protected static function get_cell_list(\DOMNode $node)
{
$xpath = new \DOMXpath($node->ownerDocument);
switch ($node->nodeName) {
default:
case "table":
$query = "tr/td | thead/tr/td | tbody/tr/td | tfoot/tr/td | tr/th | thead/tr/th | tbody/tr/th | tfoot/tr/th";
break;
case "tbody":
case "tfoot":
case "thead":
$query = "tr/td | tr/th";
break;
case "tr":
$query = "td | th";
break;
}
return $xpath->query($query, $node);
}
/**
* @param string $value
*
* @return string
*/
protected static function _get_valid_color($value)
{
if (preg_match('/^#?([0-9A-F]{6})$/i', $value, $matches)) {
$value = "#$matches[1]";
}
return $value;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return string
*/
protected static function _set_color(\DOMElement $node, $value)
{
$value = self::_get_valid_color($value);
return "color: $value;";
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return string
*/
protected static function _set_background_color(\DOMElement $node, $value)
{
$value = self::_get_valid_color($value);
return "background-color: $value;";
}
protected static function _set_px_width(\DOMElement $node, string $value): string
{
$v = trim($value);
if (Helpers::is_percent($v)) {
return sprintf("width: %s;", $v);
}
if (is_numeric(mb_substr($v, 0, 1))) {
return sprintf("width: %spx;", (float) $v);
}
return "";
}
protected static function _set_px_height(\DOMElement $node, string $value): string
{
$v = trim($value);
if (Helpers::is_percent($v)) {
return sprintf("height: %s;", $v);
}
if (is_numeric(mb_substr($v, 0, 1))) {
return sprintf("height: %spx;", (float) $v);
}
return "";
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null
*/
protected static function _set_table_cellpadding(\DOMElement $node, $value)
{
$cell_list = self::get_cell_list($node);
foreach ($cell_list as $cell) {
self::append_style($cell, "; padding: {$value}px;");
}
return null;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return string
*/
protected static function _set_table_border(\DOMElement $node, $value)
{
return "border-width: $value" . "px;";
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return string
*/
protected static function _set_table_cellspacing(\DOMElement $node, $value)
{
$style = rtrim($node->getAttribute(self::$_style_attr), ";");
if ($value == 0) {
$style .= "; border-collapse: collapse;";
} else {
$style .= "; border-spacing: {$value}px; border-collapse: separate;";
}
return ltrim($style, ";");
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null|string
*/
protected static function _set_table_rules(\DOMElement $node, $value)
{
$new_style = "; border-collapse: collapse;";
switch ($value) {
case "none":
$new_style .= "border-style: none;";
break;
case "groups":
// FIXME: unsupported
return null;
case "rows":
$new_style .= "border-style: solid none solid none; border-width: 1px; ";
break;
case "cols":
$new_style .= "border-style: none solid none solid; border-width: 1px; ";
break;
case "all":
$new_style .= "border-style: solid; border-width: 1px; ";
break;
default:
// Invalid value
return null;
}
$cell_list = self::get_cell_list($node);
foreach ($cell_list as $cell) {
$style = $cell->getAttribute(self::$_style_attr);
$style .= $new_style;
$cell->setAttribute(self::$_style_attr, $style);
}
$style = rtrim($node->getAttribute(self::$_style_attr), ";");
$style .= "; border-collapse: collapse; ";
return ltrim($style, "; ");
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return string
*/
protected static function _set_hr_size(\DOMElement $node, $value)
{
$style = rtrim($node->getAttribute(self::$_style_attr), ";");
$style .= "; border-width: " . max(0, $value - 2) . "; ";
return ltrim($style, "; ");
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null|string
*/
protected static function _set_hr_align(\DOMElement $node, $value)
{
$style = rtrim($node->getAttribute(self::$_style_attr), ";");
$width = $node->getAttribute("width");
if ($width == "") {
$width = "100%";
}
$remainder = 100 - (double)rtrim($width, "% ");
switch ($value) {
case "left":
$style .= "; margin-right: $remainder %;";
break;
case "right":
$style .= "; margin-left: $remainder %;";
break;
case "center":
$style .= "; margin-left: auto; margin-right: auto;";
break;
default:
return null;
}
return ltrim($style, "; ");
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null|string
*/
protected static function _set_input_width(\DOMElement $node, $value)
{
if (empty($value)) { return null; }
if ($node->hasAttribute("type") && in_array(strtolower($node->getAttribute("type")), ["text","password"])) {
return sprintf("width: %Fem", (((int)$value * .65)+2));
} else {
return sprintf("width: %upx;", (int)$value);
}
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null
*/
protected static function _set_table_row_align(\DOMElement $node, $value)
{
$cell_list = self::get_cell_list($node);
foreach ($cell_list as $cell) {
self::append_style($cell, "; text-align: $value;");
}
return null;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null
*/
protected static function _set_table_row_valign(\DOMElement $node, $value)
{
$cell_list = self::get_cell_list($node);
foreach ($cell_list as $cell) {
self::append_style($cell, "; vertical-align: $value;");
}
return null;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null
*/
protected static function _set_table_row_bgcolor(\DOMElement $node, $value)
{
$cell_list = self::get_cell_list($node);
$value = self::_get_valid_color($value);
foreach ($cell_list as $cell) {
self::append_style($cell, "; background-color: $value;");
}
return null;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null
*/
protected static function _set_body_link(\DOMElement $node, $value)
{
$a_list = $node->getElementsByTagName("a");
$value = self::_get_valid_color($value);
foreach ($a_list as $a) {
self::append_style($a, "; color: $value;");
}
return null;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return null
*/
protected static function _set_basefont_size(\DOMElement $node, $value)
{
// FIXME: ? we don't actually set the font size of anything here, just
// the base size for later modification by <font> tags.
self::$_last_basefont_size = $value;
return null;
}
/**
* @param \DOMElement $node
* @param string $value
*
* @return string
*/
protected static function _set_font_size(\DOMElement $node, $value)
{
$style = $node->getAttribute(self::$_style_attr);
if ($value[0] === "-" || $value[0] === "+") {
$value = self::$_last_basefont_size + (int)$value;
}
if (isset(self::$_font_size_lookup[$value])) {
$style .= "; font-size: " . self::$_font_size_lookup[$value] . ";";
} else {
$style .= "; font-size: $value;";
}
return ltrim($style, "; ");
}
}
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