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Add hooks for overriding default email inline styles 

Currently any h1, h2, h3, a and img tags in a HTML email without a
style attribute will have a default inline style applied to them.
These styles are hard-coded and cannot currently overridden without
patching the source code.

This commit adds two filter hooks that allows the theme developer to
override both the list of tags that have a default style applied to
them and the default styles applied to each tag. The hooks are:

1. woocommerce_email_style_inline_tags
This filter hook returns an array of tags which will have a default
style applied to them - you can both remove and add any tags which
you need for your theme's custom emails.

2. woocommerce_email_style_inline_{name}_tag
This filter is called for every tag name returned by the filter hook
woocommerce_email_style_inline_tags. The styles are passed as an
associative array so you can both add and remove any of the default
styles applied by WooCommerce.

Fixes #3597.
This commit is contained in:
Andrew White 2013-08-20 23:11:43 +01:00
parent 5f2e489944
commit e05e970d6a
1 changed files with 146 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

173
includes/abstracts/abstract-wc-email.php
View File

@ -153,6 +153,14 @@ abstract class WC_Email extends WC_Settings_API {
// For multipart messages
add_filter( 'phpmailer_init', array( $this, 'handle_multipart' ) );
// For default inline styles
add_filter( 'woocommerce_email_style_inline_tags', array( $this, 'style_inline_tags' ) );
add_filter( 'woocommerce_email_style_inline_h1_tag', array( $this, 'style_inline_h1_tag' ) );
add_filter( 'woocommerce_email_style_inline_h2_tag', array( $this, 'style_inline_h2_tag' ) );
add_filter( 'woocommerce_email_style_inline_h3_tag', array( $this, 'style_inline_h3_tag' ) );
add_filter( 'woocommerce_email_style_inline_a_tag', array( $this, 'style_inline_a_tag' ) );
add_filter( 'woocommerce_email_style_inline_img_tag', array( $this, 'style_inline_img_tag' ) );
}
/**
@ -312,6 +320,137 @@ abstract class WC_Email extends WC_Settings_API {
return $email_content;
}
/**
* style_inline_tags function.
*
* @access public
* @return array
*/
function style_inline_tags($tags) {
return array_unique( array_merge( $tags, array( 'h1', 'h2', 'h3', 'a', 'img' ) ) );
}
/**
* style_inline_h1_tag function.
*
* @access public
* @return array
*/
function style_inline_h1_tag($styles) {
$styles['color'] = get_option( 'woocommerce_email_text_color' );
$styles['display'] = 'block';
$styles['font-family'] = 'Arial';
$styles['font-size'] = '34px';
$styles['font-weight'] = 'bold';
$styles['margin-top'] = '10px';
$styles['margin-right'] = '0';
$styles['margin-bottom'] = '10px';
$styles['margin-left'] = '0';
$styles['text-align'] = 'left';
$styles['line-height'] = '150%';
return $styles;
}
/**
* style_inline_h2_tag function.
*
* @access public
* @return array
*/
function style_inline_h2_tag($styles) {
$styles['color'] = get_option( 'woocommerce_email_text_color' );
$styles['display'] = 'block';
$styles['font-family'] = 'Arial';
$styles['font-size'] = '30px';
$styles['font-weight'] = 'bold';
$styles['margin-top'] = '10px';
$styles['margin-right'] = '0';
$styles['margin-bottom'] = '10px';
$styles['margin-left'] = '0';
$styles['text-align'] = 'left';
$styles['line-height'] = '150%';
return $styles;
}
/**
* style_inline_h3_tag function.
*
* @access public
* @return array
*/
function style_inline_h3_tag($styles) {
$styles['color'] = get_option( 'woocommerce_email_text_color' );
$styles['display'] = 'block';
$styles['font-family'] = 'Arial';
$styles['font-size'] = '26px';
$styles['font-weight'] = 'bold';
$styles['margin-top'] = '10px';
$styles['margin-right'] = '0';
$styles['margin-bottom'] = '10px';
$styles['margin-left'] = '0';
$styles['text-align'] = 'left';
$styles['line-height'] = '150%';
return $styles;
}
function style_inline_a_tag($styles) {
$styles['color'] = get_option( 'woocommerce_email_text_color' );
$styles['font-weight'] = 'normal';
$styles['text-decoration'] = 'underline';
return $styles;
}
/**
* style_inline_img_tag function.
*
* @access public
* @return array
*/
function style_inline_img_tag($styles) {
$styles['display'] = 'inline';
$styles['border'] = 'none';
$styles['font-size'] = '14px';
$styles['font-weight'] = 'bold';
$styles['height'] = 'auto';
$styles['line-height'] = '100%';
$styles['outline'] = 'none';
$styles['text-decoration'] = 'none';
$styles['text-transform'] = 'capitalize';
return $styles;
}
/**
* get_style_inline_tags function.
*
* @access public
* @return array
*/
function get_style_inline_tags() {
return apply_filters( 'woocommerce_email_style_inline_tags', array() );
}
/**
* get_style_inline_for_tag function.
*
* @access public
* @return string
*/
function get_style_inline_for_tag($tag) {
$styles = apply_filters( 'woocommerce_email_style_inline_' . $tag . '_tag', array() );
$css = array();
foreach( $styles as $property => $value ) {
$css[] = $property . ':' . $value;
}
return implode('; ', $css);
}
/**
* Apply inline styles to dynamic content.
*
@ -320,40 +459,20 @@ abstract class WC_Email extends WC_Settings_API {
* @return void
*/
function style_inline( $content ) {
if ( ! class_exists( 'DOMDocument' ) )
return $content;
$dom = new DOMDocument();
@$dom->loadHTML( $content );
$nodes = $dom->getElementsByTagName('img');
foreach( $this->get_style_inline_tags() as $tag ) {
$nodes = $dom->getElementsByTagName($tag);
foreach( $nodes as $node )
if ( ! $node->hasAttribute( 'style' ) )
$node->setAttribute( "style", "display:inline; border:none; font-size:14px; font-weight:bold; height:auto; line-height:100%; outline:none; text-decoration:none; text-transform:capitalize;" );
$nodes_h1 = $dom->getElementsByTagName('h1');
$nodes_h2 = $dom->getElementsByTagName('h2');
$nodes_h3 = $dom->getElementsByTagName('h3');
foreach( $nodes_h1 as $node )
if ( ! $node->hasAttribute( 'style' ) )
$node->setAttribute( "style", "color: " . get_option( 'woocommerce_email_text_color' ) . "; display:block; font-family:Arial; font-size:34px; font-weight:bold; margin-top: 10px; margin-right:0; margin-bottom:10px; margin-left:0; text-align:left; line-height: 150%;" );
foreach( $nodes_h2 as $node )
if ( ! $node->hasAttribute( 'style' ) )
$node->setAttribute( "style", "color: " . get_option( 'woocommerce_email_text_color' ) . "; display:block; font-family:Arial; font-size:30px; font-weight:bold; margin-top: 10px; margin-right:0; margin-bottom:10px; margin-left:0; text-align:left; line-height: 150%;" );
foreach( $nodes_h3 as $node )
if ( ! $node->hasAttribute( 'style' ) )
$node->setAttribute( "style", "color: " . get_option( 'woocommerce_email_text_color' ) . "; display:block; font-family:Arial; font-size:26px; font-weight:bold; margin-top: 10px; margin-right:0; margin-bottom:10px; margin-left:0; text-align:left; line-height: 150%;" );
$nodes = $dom->getElementsByTagName('a');
foreach( $nodes as $node )
if ( ! $node->hasAttribute( 'style' ) )
$node->setAttribute( "style", "color: " . get_option( 'woocommerce_email_text_color' ) . "; font-weight:normal; text-decoration:underline;" );
foreach( $nodes as $node ) {
if ( ! $node->hasAttribute( 'style' ) )
$node->setAttribute( 'style', $this->get_style_inline_for_tag($tag) );
}
}
$content = $dom->saveHTML();