File size: 2,377 Bytes
1e92f2d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | import { MediaTypes } from '../constants';
/**
* Module variables
*/
const REGEXP_IMG_CLASS_SIZE = /\bsize-(\w+)\b/;
const REGEXP_IMG_CLASS_ID = /\bwp-image-((media-)?\d+)\b/;
const REGEXP_IMG_CLASS_ALIGN = /\balign(left|center|right|none)\b/;
/**
* Given an <img /> HTMLElement, returns an object of parsed attributes.
* @param {HTMLElement} node <img /> HTMLElement
* @param {Object} _parsed In recursion, the known values
* @returns {Object} Object of all detected values
*/
function parseImage( node, _parsed ) {
_parsed.type = MediaTypes.IMAGE;
_parsed.media.URL = node.getAttribute( 'src' );
_parsed.media.alt = node.getAttribute( 'alt' );
// consider data-istransient a boolean attribute https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#boolean-attribute
// will only be false if it doesn't exist
_parsed.media.transient = node.hasAttribute( 'data-istransient' );
// Parse dimensions
[ 'width', 'height' ].forEach( ( dimension ) => {
const natural = 'natural' + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );
const value = node.getAttribute( dimension ) || node[ natural ] || node[ dimension ];
if ( value && isFinite( value ) ) {
_parsed.media[ dimension ] = parseInt( value, 10 );
}
} );
// Parse size from class name
if ( REGEXP_IMG_CLASS_SIZE.test( node.className ) ) {
_parsed.appearance.size = node.className.match( REGEXP_IMG_CLASS_SIZE )[ 1 ];
}
// Parse alignment from class name
if ( REGEXP_IMG_CLASS_ALIGN.test( node.className ) ) {
_parsed.appearance.align = node.className.match( REGEXP_IMG_CLASS_ALIGN )[ 1 ];
}
// Parse ID from class name
if ( REGEXP_IMG_CLASS_ID.test( node.className ) ) {
_parsed.media.ID = node.className.match( REGEXP_IMG_CLASS_ID )[ 1 ];
if ( isFinite( _parsed.media.ID ) ) {
_parsed.media.ID = parseInt( _parsed.media.ID, 10 );
}
}
return _parsed;
}
/**
* Given a media HTMLElement object, returns an object containing all detected
* values.
* @param {HTMLElement} node Media object to parse
* @param {Object} _parsed In recursion, the known values
* @returns {Object} Object of all detected values
*/
export function deserialize( node, _parsed = { media: {}, appearance: {} } ) {
switch ( node.nodeName ) {
case 'IMG':
_parsed = parseImage( node, _parsed );
break;
}
return _parsed;
}
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