/**
* Consolidates background styles into a single background style
*
* @param array $styles Consolidates the provided array of background styles
* @return array Consolidated optimised background styles
*/
public static function consolidate(array $styles)
{
if (count($styles) < 1) {
return $styles;
}
$color = $image = $repeat = $attachment = $position = null;
foreach ($styles as $style) {
switch ($style->get_name()) {
case 'background-color':
$color = css_style_color::shrink_value($style->get_value());
break;
case 'background-image':
$image = $style->get_value();
break;
case 'background-repeat':
$repeat = $style->get_value();
break;
case 'background-attachment':
$attachment = $style->get_value();
break;
case 'background-position':
$position = $style->get_value();
break;
}
}
if ((is_null($image) || is_null($position) || is_null($repeat)) && ($image != null || $position != null || $repeat != null)) {
return $styles;
}
$value = array();
if (!is_null($color)) {
$value[] .= $color;
}
if (!is_null($image)) {
$value[] .= $image;
}
if (!is_null($repeat)) {
$value[] .= $repeat;
}
if (!is_null($attachment)) {
$value[] .= $attachment;
}
if (!is_null($position)) {
$value[] .= $position;
}
return array(new css_style_background('background', join(' ', $value)));
}
/**
* Consolidates background styles into a single background style
*
* @param array $styles Consolidates the provided array of background styles
* @return array Consolidated optimised background styles
*/
public static function consolidate(array $styles)
{
if (empty($styles)) {
return $styles;
}
$color = null;
$image = null;
$repeat = null;
$attachment = null;
$position = null;
$size = null;
$origin = null;
$clip = null;
$someimportant = false;
$allimportant = null;
foreach ($styles as $style) {
if ($style instanceof css_style_backgroundimage_advanced) {
continue;
}
if ($style->is_important()) {
$someimportant = true;
if ($allimportant === null) {
$allimportant = true;
}
} else {
if ($allimportant === true) {
$allimportant = false;
}
}
}
$organisedstyles = array();
$advancedstyles = array();
$importantstyles = array();
foreach ($styles as $style) {
if ($style instanceof css_style_backgroundimage_advanced) {
$advancedstyles[] = $style;
continue;
}
if ($someimportant && !$allimportant && $style->is_important()) {
$importantstyles[] = $style;
continue;
}
$organisedstyles[$style->get_name()] = $style;
switch ($style->get_name()) {
case 'background-color':
$color = css_style_color::shrink_value($style->get_value(false));
break;
case 'background-image':
$image = $style->get_value(false);
break;
case 'background-repeat':
$repeat = $style->get_value(false);
break;
case 'background-attachment':
$attachment = $style->get_value(false);
break;
case 'background-position':
$position = $style->get_value(false);
break;
case 'background-clip':
$clip = $style->get_value();
break;
case 'background-origin':
$origin = $style->get_value();
break;
case 'background-size':
$size = $style->get_value();
break;
}
}
$consolidatetosingle = array();
if (!is_null($color) && !is_null($image) && !is_null($repeat) && !is_null($attachment) && !is_null($position)) {
// We can use the shorthand background-style!
if (!$organisedstyles['background-color']->is_special_empty_value()) {
$consolidatetosingle[] = $color;
}
if (!$organisedstyles['background-image']->is_special_empty_value()) {
$consolidatetosingle[] = $image;
}
if (!$organisedstyles['background-repeat']->is_special_empty_value()) {
$consolidatetosingle[] = $repeat;
}
if (!$organisedstyles['background-attachment']->is_special_empty_value()) {
$consolidatetosingle[] = $attachment;
}
if (!$organisedstyles['background-position']->is_special_empty_value()) {
$consolidatetosingle[] = $position;
}
// Reset them all to null so we don't use them again.
$color = null;
$image = null;
$repeat = null;
$attachment = null;
$position = null;
}
$return = array();
// Single background style needs to come first;
if (count($consolidatetosingle) > 0) {
$returnstyle = new css_style_background('background', join(' ', $consolidatetosingle));
if ($allimportant) {
$returnstyle->set_important();
}
$return[] = $returnstyle;
}
foreach ($styles as $style) {
$value = null;
switch ($style->get_name()) {
case 'background-color':
$value = $color;
break;
case 'background-image':
$value = $image;
break;
case 'background-repeat':
$value = $repeat;
break;
case 'background-attachment':
$value = $attachment;
break;
case 'background-position':
$value = $position;
break;
case 'background-clip':
$value = $clip;
break;
case 'background-origin':
$value = $origin;
break;
case 'background-size':
$value = $size;
break;
}
if (!is_null($value)) {
$return[] = $style;
}
}
$return = array_merge($return, $importantstyles, $advancedstyles);
return $return;
}
