mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-09 20:30:43 +01:00
c5d19aed9c
git-svn-id: http://svn.automattic.com/wordpress/trunk@6974 1a063a9b-81f0-0310-95a4-ce76da25c4cd
95 lines
3.4 KiB
PHP
95 lines
3.4 KiB
PHP
<?php
|
|
|
|
// functions for media display
|
|
|
|
// scale down the default size of an image so it's a better fit for the editor and theme
|
|
function image_constrain_size_for_editor($width, $height, $size = 'medium') {
|
|
|
|
if ( $size == 'thumb' ) {
|
|
$max_width = intval(get_option('thumbnail_size_w'));
|
|
$max_height = intval(get_option('thumbnail_size_h'));
|
|
// last chance thumbnail size defaults
|
|
if ( !$max_width && !$max_height ) {
|
|
$max_width = 128;
|
|
$max_height = 96;
|
|
}
|
|
}
|
|
elseif ( $size == 'medium' ) {
|
|
$max_width = intval(get_option('medium_size_w'));
|
|
$max_height = intval(get_option('medium_size_h'));
|
|
// if no width is set, default to the theme content width if available
|
|
if ( !$max_width ) {
|
|
// $content_width might be set in the current theme's functions.php
|
|
if ( !empty($GLOBALS['content_width']) ) {
|
|
$max_width = $GLOBALS['content_width'];
|
|
}
|
|
else
|
|
$max_width = 500;
|
|
}
|
|
}
|
|
else { // $size == 'full'
|
|
$max_width = 0;
|
|
$max_height = 0;
|
|
}
|
|
|
|
list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size );
|
|
|
|
return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
|
|
}
|
|
|
|
// return a width/height string for use in an <img /> tag. Empty values will be omitted.
|
|
function image_hwstring($width, $height) {
|
|
$out = '';
|
|
if ($width)
|
|
$out .= 'width="'.intval($width).'" ';
|
|
if ($height)
|
|
$out .= 'height="'.intval($height).'" ';
|
|
return $out;
|
|
}
|
|
|
|
// Scale an image to fit a particular size (such as 'thumb' or 'medium'), and return an image URL, height and width.
|
|
// The URL might be the original image, or it might be a resized version.
|
|
// returns an array($url, $width, $height)
|
|
function image_downsize($id, $size = 'medium') {
|
|
|
|
$img_url = wp_get_attachment_url($id);
|
|
$meta = wp_get_attachment_metadata($id);
|
|
$width = $height = 0;
|
|
|
|
// plugins can use this to provide resize services
|
|
if ( $out = apply_filters('image_downsize', false, $id, $size) )
|
|
return $out;
|
|
|
|
if ( $size == 'thumb' ) {
|
|
// thumbnail: use the thumb as the displayed image, and constrain based on its dimensions
|
|
$thumb_path = wp_get_attachment_thumb_file($id);
|
|
// the actual thumbnail size isn't stored so we'll have to calculate it
|
|
if ( $thumb_path && ($info = getimagesize($thumb_path)) ) {
|
|
list( $width, $height ) = image_constrain_size_for_editor( $info[0], $info[1], $size );
|
|
$img_url = wp_get_attachment_thumb_url($id);
|
|
}
|
|
// this could be improved to provide a default thumbnail if one doesn't exist
|
|
}
|
|
elseif ( isset($meta['width'], $meta['height']) ) {
|
|
// any other type: use the real image and constrain it
|
|
list( $width, $height ) = image_constrain_size_for_editor( $meta['width'], $meta['height'], $size );
|
|
}
|
|
|
|
return array( $img_url, $width, $height );
|
|
|
|
}
|
|
|
|
// return an <img src /> tag for the given image attachment, scaling it down if requested
|
|
function get_image_tag($id, $alt, $title, $align, $rel = false, $size='medium') {
|
|
|
|
list( $img_src, $width, $height ) = image_downsize($id, $size);
|
|
$hwstring = image_hwstring($width, $height);
|
|
|
|
$html = '<img src="'.attribute_escape($img_src).'" alt="'.attribute_escape($alt).'" title="'.attribute_escape($title).'" '.$hwstring.'class="align-'.attribute_escape($align).' size-'.attribute_escape($size).' attachment wp-att-'.attribute_escape($id).'" />';
|
|
|
|
$html = apply_filters( 'image_send_to_editor', $html, $id, $alt, $title, $align, $url );
|
|
|
|
return $html;
|
|
}
|
|
|
|
?>
|