| 1 | /**
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| 2 | * @license Copyright (c) 2003-2022, CKSource Holding sp. z o.o. All rights reserved.
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| 3 | * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
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| 4 | */
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| 5 |
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| 6 | /**
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| 7 | * @module paste-from-office/filters/space
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| 8 | */
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| 9 |
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| 10 | /**
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| 11 | * Replaces last space preceding elements closing tag with ` `. Such operation prevents spaces from being removed
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| 12 | * during further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).
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| 13 | * This method also takes into account Word specific `<o:p></o:p>` empty tags.
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| 14 | * Additionally multiline sequences of spaces and new lines between tags are removed (see #39 and #40).
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| 15 | *
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| 16 | * @param {String} htmlString HTML string in which spacing should be normalized.
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| 17 | * @returns {String} Input HTML with spaces normalized.
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| 18 | */
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| 19 | export function normalizeSpacing( htmlString ) {
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| 20 | // Run normalizeSafariSpaceSpans() two times to cover nested spans.
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| 21 | return normalizeSafariSpaceSpans( normalizeSafariSpaceSpans( htmlString ) )
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| 22 | // Remove all \r\n from "spacerun spans" so the last replace line doesn't strip all whitespaces.
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| 23 | .replace( /(<span\s+style=['"]mso-spacerun:yes['"]>[^\S\r\n]*?)[\r\n]+([^\S\r\n]*<\/span>)/g, '$1$2' )
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| 24 | .replace( /<span\s+style=['"]mso-spacerun:yes['"]><\/span>/g, '' )
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| 25 | .replace( / <\//g, '\u00A0</' )
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| 26 | .replace( / <o:p><\/o:p>/g, '\u00A0<o:p></o:p>' )
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| 27 | // Remove <o:p> block filler from empty paragraph. Safari uses \u00A0 instead of .
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| 28 | .replace( /<o:p>( |\u00A0)<\/o:p>/g, '' )
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| 29 | // Remove all whitespaces when they contain any \r or \n.
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| 30 | .replace( />([^\S\r\n]*[\r\n]\s*)</g, '><' );
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| 31 | }
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| 32 |
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| 33 | /**
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| 34 | * Normalizes spacing in special Word `spacerun spans` (`<span style='mso-spacerun:yes'>\s+</span>`) by replacing
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| 35 | * all spaces with ` ` pairs. This prevents spaces from being removed during further DOM/View processing
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| 36 | * (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).
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| 37 | *
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| 38 | * @param {Document} htmlDocument Native `Document` object in which spacing should be normalized.
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| 39 | */
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| 40 | export function normalizeSpacerunSpans( htmlDocument ) {
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| 41 | htmlDocument.querySelectorAll( 'span[style*=spacerun]' ).forEach( el => {
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| 42 | const innerTextLength = el.innerText.length || 0;
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| 43 |
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| 44 | el.innerHTML = Array( innerTextLength + 1 ).join( '\u00A0 ' ).substr( 0, innerTextLength );
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| 45 | } );
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| 46 | }
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| 47 |
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| 48 | // Normalizes specific spacing generated by Safari when content pasted from Word (`<span class="Apple-converted-space"> </span>`)
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| 49 | // by replacing all spaces sequences longer than 1 space with ` ` pairs. This prevents spaces from being removed during
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| 50 | // further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).
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| 51 | //
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| 52 | // This function is similar to {@link module:clipboard/utils/normalizeclipboarddata normalizeClipboardData util} but uses
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| 53 | // regular spaces / sequence for replacement.
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| 54 | //
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| 55 | // @param {String} htmlString HTML string in which spacing should be normalized
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| 56 | // @returns {String} Input HTML with spaces normalized.
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| 57 | function normalizeSafariSpaceSpans( htmlString ) {
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| 58 | return htmlString.replace( /<span(?: class="Apple-converted-space"|)>(\s+)<\/span>/g, ( fullMatch, spaces ) => {
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| 59 | return spaces.length === 1 ? ' ' : Array( spaces.length + 1 ).join( '\u00A0 ' ).substr( 0, spaces.length );
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| 60 | } );
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| 61 | }
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