123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352 |
- /**
- * @file
- * Drupal Image Caption plugin.
- *
- * This alters the existing CKEditor image2 widget plugin, which is already
- * altered by the Drupal Image plugin, to:
- * - allow for the data-caption and data-align attributes to be set
- * - mimic the upcasting behavior of the caption_filter filter.
- *
- * @ignore
- */
- (function(CKEDITOR) {
- /**
- * Finds an element by its name.
- *
- * Function will check first the passed element itself and then all its
- * children in DFS order.
- *
- * @param {CKEDITOR.htmlParser.element} element
- * The element to search.
- * @param {string} name
- * The element name to search for.
- *
- * @return {?CKEDITOR.htmlParser.element}
- * The found element, or null.
- */
- function findElementByName(element, name) {
- if (element.name === name) {
- return element;
- }
- let found = null;
- element.forEach(el => {
- if (el.name === name) {
- found = el;
- // Stop here.
- return false;
- }
- }, CKEDITOR.NODE_ELEMENT);
- return found;
- }
- CKEDITOR.plugins.add('drupalimagecaption', {
- requires: 'drupalimage',
- beforeInit(editor) {
- // Disable default placeholder text that comes with CKEditor's image2
- // plugin: it has an inferior UX (it requires the user to manually delete
- // the place holder text).
- editor.lang.image2.captionPlaceholder = '';
- // Drupal.t() will not work inside CKEditor plugins because CKEditor loads
- // the JavaScript file instead of Drupal. Pull translated strings from the
- // plugin settings that are translated server-side.
- const placeholderText =
- editor.config.drupalImageCaption_captionPlaceholderText;
- // Override the image2 widget definition to handle the additional
- // data-align and data-caption attributes.
- editor.on(
- 'widgetDefinition',
- event => {
- const widgetDefinition = event.data;
- if (widgetDefinition.name !== 'image') {
- return;
- }
- // Only perform the downcasting/upcasting for to the enabled filters.
- const captionFilterEnabled =
- editor.config.drupalImageCaption_captionFilterEnabled;
- const alignFilterEnabled =
- editor.config.drupalImageCaption_alignFilterEnabled;
- // Override default features definitions for drupalimagecaption.
- CKEDITOR.tools.extend(
- widgetDefinition.features,
- {
- caption: {
- requiredContent: 'img[data-caption]',
- },
- align: {
- requiredContent: 'img[data-align]',
- },
- },
- true,
- );
- // Extend requiredContent & allowedContent.
- // CKEDITOR.style is an immutable object: we cannot modify its
- // definition to extend requiredContent. Hence we get the definition,
- // modify it, and pass it to a new CKEDITOR.style instance.
- const requiredContent = widgetDefinition.requiredContent.getDefinition();
- requiredContent.attributes['data-align'] = '';
- requiredContent.attributes['data-caption'] = '';
- widgetDefinition.requiredContent = new CKEDITOR.style(
- requiredContent,
- );
- widgetDefinition.allowedContent.img.attributes['!data-align'] = true;
- widgetDefinition.allowedContent.img.attributes[
- '!data-caption'
- ] = true;
- // Override allowedContent setting for the 'caption' nested editable.
- // This must match what caption_filter enforces.
- // @see \Drupal\filter\Plugin\Filter\FilterCaption::process()
- // @see \Drupal\Component\Utility\Xss::filter()
- widgetDefinition.editables.caption.allowedContent =
- 'a[!href]; em strong cite code br';
- // Override downcast(): ensure we *only* output <img>, but also ensure
- // we include the data-entity-type, data-entity-uuid, data-align and
- // data-caption attributes.
- const originalDowncast = widgetDefinition.downcast;
- widgetDefinition.downcast = function(element) {
- const img = findElementByName(element, 'img');
- originalDowncast.call(this, img);
- const caption = this.editables.caption;
- const captionHtml = caption && caption.getData();
- const attrs = img.attributes;
- if (captionFilterEnabled) {
- // If image contains a non-empty caption, serialize caption to the
- // data-caption attribute.
- if (captionHtml) {
- attrs['data-caption'] = captionHtml;
- }
- }
- if (alignFilterEnabled) {
- if (this.data.align !== 'none') {
- attrs['data-align'] = this.data.align;
- }
- }
- // If img is wrapped with a link, we want to return that link.
- if (img.parent.name === 'a') {
- return img.parent;
- }
- return img;
- };
- // We want to upcast <img> elements to a DOM structure required by the
- // image2 widget. Depending on a case it may be:
- // - just an <img> tag (non-captioned, not-centered image),
- // - <img> tag in a paragraph (non-captioned, centered image),
- // - <figure> tag (captioned image).
- // We take the same attributes into account as downcast() does.
- const originalUpcast = widgetDefinition.upcast;
- widgetDefinition.upcast = function(element, data) {
- if (
- element.name !== 'img' ||
- !element.attributes['data-entity-type'] ||
- !element.attributes['data-entity-uuid']
- ) {
- return;
- }
- // Don't initialize on pasted fake objects.
- if (element.attributes['data-cke-realelement']) {
- return;
- }
- element = originalUpcast.call(this, element, data);
- const attrs = element.attributes;
- if (element.parent.name === 'a') {
- element = element.parent;
- }
- let retElement = element;
- let caption;
- // We won't need the attributes during editing: we'll use widget.data
- // to store them (except the caption, which is stored in the DOM).
- if (captionFilterEnabled) {
- caption = attrs['data-caption'];
- delete attrs['data-caption'];
- }
- if (alignFilterEnabled) {
- data.align = attrs['data-align'];
- delete attrs['data-align'];
- }
- data['data-entity-type'] = attrs['data-entity-type'];
- delete attrs['data-entity-type'];
- data['data-entity-uuid'] = attrs['data-entity-uuid'];
- delete attrs['data-entity-uuid'];
- if (captionFilterEnabled) {
- // Unwrap from <p> wrapper created by HTML parser for a captioned
- // image. The captioned image will be transformed to <figure>, so we
- // don't want the <p> anymore.
- if (element.parent.name === 'p' && caption) {
- let index = element.getIndex();
- const splitBefore = index > 0;
- const splitAfter = index + 1 < element.parent.children.length;
- if (splitBefore) {
- element.parent.split(index);
- }
- index = element.getIndex();
- if (splitAfter) {
- element.parent.split(index + 1);
- }
- element.parent.replaceWith(element);
- retElement = element;
- }
- // If this image has a caption, create a full <figure> structure.
- if (caption) {
- const figure = new CKEDITOR.htmlParser.element('figure');
- caption = new CKEDITOR.htmlParser.fragment.fromHtml(
- caption,
- 'figcaption',
- );
- const captionFilter = new CKEDITOR.filter(
- widgetDefinition.editables.caption.allowedContent,
- );
- captionFilter.applyTo(caption);
- // Use Drupal's data-placeholder attribute to insert a CSS-based,
- // translation-ready placeholder for empty captions. Note that it
- // also must to be done for new instances (see
- // widgetDefinition._createDialogSaveCallback).
- caption.attributes['data-placeholder'] = placeholderText;
- element.replaceWith(figure);
- figure.add(element);
- figure.add(caption);
- figure.attributes.class = editor.config.image2_captionedClass;
- retElement = figure;
- }
- }
- if (alignFilterEnabled) {
- // If this image doesn't have a caption (or the caption filter is
- // disabled), but it is centered, make sure that it's wrapped with
- // <p>, which will become a part of the widget.
- if (
- data.align === 'center' &&
- (!captionFilterEnabled || !caption)
- ) {
- const p = new CKEDITOR.htmlParser.element('p');
- element.replaceWith(p);
- p.add(element);
- // Apply the class for centered images.
- p.addClass(editor.config.image2_alignClasses[1]);
- retElement = p;
- }
- }
- // Return the upcasted element (<img>, <figure> or <p>).
- return retElement;
- };
- // Protected; keys of the widget data to be sent to the Drupal dialog.
- // Append to the values defined by the drupalimage plugin.
- // @see core/modules/ckeditor/js/plugins/drupalimage/plugin.js
- CKEDITOR.tools.extend(widgetDefinition._mapDataToDialog, {
- align: 'data-align',
- 'data-caption': 'data-caption',
- hasCaption: 'hasCaption',
- });
- // Override Drupal dialog save callback.
- const originalCreateDialogSaveCallback =
- widgetDefinition._createDialogSaveCallback;
- widgetDefinition._createDialogSaveCallback = function(
- editor,
- widget,
- ) {
- const saveCallback = originalCreateDialogSaveCallback.call(
- this,
- editor,
- widget,
- );
- return function(dialogReturnValues) {
- // Ensure hasCaption is a boolean. image2 assumes it always works
- // with booleans; if this is not the case, then
- // CKEDITOR.plugins.image2.stateShifter() will incorrectly mark
- // widget.data.hasCaption as "changed" (e.g. when hasCaption === 0
- // instead of hasCaption === false). This causes image2's "state
- // shifter" to enter the wrong branch of the algorithm and blow up.
- dialogReturnValues.attributes.hasCaption = !!dialogReturnValues
- .attributes.hasCaption;
- const actualWidget = saveCallback(dialogReturnValues);
- // By default, the template of captioned widget has no
- // data-placeholder attribute. Note that it also must be done when
- // upcasting existing elements (see widgetDefinition.upcast).
- if (dialogReturnValues.attributes.hasCaption) {
- actualWidget.editables.caption.setAttribute(
- 'data-placeholder',
- placeholderText,
- );
- // Some browsers will add a <br> tag to a newly created DOM
- // element with no content. Remove this <br> if it is the only
- // thing in the caption. Our placeholder support requires the
- // element be entirely empty. See filter-caption.css.
- const captionElement = actualWidget.editables.caption.$;
- if (
- captionElement.childNodes.length === 1 &&
- captionElement.childNodes.item(0).nodeName === 'BR'
- ) {
- captionElement.removeChild(captionElement.childNodes.item(0));
- }
- }
- };
- };
- // Low priority to ensure drupalimage's event handler runs first.
- },
- null,
- null,
- 20,
- );
- },
- afterInit(editor) {
- const disableButtonIfOnWidget = function(evt) {
- const widget = editor.widgets.focused;
- if (widget && widget.name === 'image') {
- this.setState(CKEDITOR.TRISTATE_DISABLED);
- evt.cancel();
- }
- };
- // Disable alignment buttons if the align filter is not enabled.
- if (
- editor.plugins.justify &&
- !editor.config.drupalImageCaption_alignFilterEnabled
- ) {
- let cmd;
- const commands = [
- 'justifyleft',
- 'justifycenter',
- 'justifyright',
- 'justifyblock',
- ];
- for (let n = 0; n < commands.length; n++) {
- cmd = editor.getCommand(commands[n]);
- cmd.contextSensitive = 1;
- cmd.on('refresh', disableButtonIfOnWidget, null, null, 4);
- }
- }
- },
- });
- })(CKEDITOR);
|