| 1 | /**
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| 2 | * @license Copyright (c) 2003-2023, 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 | * @module image/pictureediting
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| 7 | */
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| 8 | import { Plugin } from 'ckeditor5/src/core';
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| 9 | import ImageEditing from './image/imageediting';
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| 10 | import ImageUtils from './imageutils';
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| 11 | import { downcastSourcesAttribute, upcastPicture } from './image/converters';
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| 12 | /**
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| 13 | * This plugin enables the [`<picture>`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/picture) element support in the editor.
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| 14 | *
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| 15 | * * It enables the `sources` model attribute on `imageBlock` and `imageInline` model elements
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| 16 | * (brought by {@link module:image/imageblock~ImageBlock} and {@link module:image/imageinline~ImageInline}, respectively).
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| 17 | * * It translates the `sources` model element to the view (also: data) structure that may look as follows:
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| 18 | *
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| 19 | * ```html
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| 20 | * <p>Inline image using picture:
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| 21 | * <picture>
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| 22 | * <source media="(min-width: 800px)" srcset="image-large.webp" type="image/webp">
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| 23 | * <source media="(max-width: 800px)" srcset="image-small.webp" type="image/webp">
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| 24 | * <!-- Other sources as specified in the "sources" model attribute... -->
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| 25 | * <img src="image.png" alt="An image using picture" />
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| 26 | * </picture>
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| 27 | * </p>
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| 28 | *
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| 29 | * <p>Block image using picture:</p>
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| 30 | * <figure class="image">
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| 31 | * <picture>
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| 32 | * <source media="(min-width: 800px)" srcset="image-large.webp" type="image/webp">
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| 33 | * <source media="(max-width: 800px)" srcset="image-small.webp" type="image/webp">
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| 34 | * <!-- Other sources as specified in the "sources" model attribute... -->
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| 35 | * <img src="image.png" alt="An image using picture" />
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| 36 | * </picture>
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| 37 | * <figcaption>Caption of the image</figcaption>
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| 38 | * </figure>
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| 39 | * ```
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| 40 | *
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| 41 | * **Note:** The value of the `sources` {@glink framework/architecture/editing-engine#changing-the-model model attribute}
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| 42 | * in both examples equals:
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| 43 | *
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| 44 | * ```css
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| 45 | * [
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| 46 | * {
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| 47 | * media: '(min-width: 800px)',
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| 48 | * srcset: 'image-large.webp',
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| 49 | * type: 'image/webp'
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| 50 | * },
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| 51 | * {
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| 52 | * media: '(max-width: 800px)',
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| 53 | * srcset: 'image-small.webp',
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| 54 | * type: 'image/webp'
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| 55 | * }
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| 56 | * ]
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| 57 | * ```
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| 58 | *
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| 59 | * * It integrates with the {@link module:image/imageupload~ImageUpload} plugin so images uploaded in the editor
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| 60 | * automatically render using `<picture>` if the {@glink features/images/image-upload/image-upload upload adapter}
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| 61 | * supports image sources and provides neccessary data.
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| 62 | *
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| 63 | * @private
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| 64 | */
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| 65 | export default class PictureEditing extends Plugin {
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| 66 | /**
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| 67 | * @inheritDoc
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| 68 | */
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| 69 | static get requires() {
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| 70 | return [ImageEditing, ImageUtils];
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| 71 | }
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| 72 | /**
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| 73 | * @inheritDoc
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| 74 | */
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| 75 | static get pluginName() {
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| 76 | return 'PictureEditing';
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| 77 | }
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| 78 | /**
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| 79 | * @inheritDoc
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| 80 | */
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| 81 | afterInit() {
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| 82 | const editor = this.editor;
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| 83 | if (editor.plugins.has('ImageBlockEditing')) {
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| 84 | editor.model.schema.extend('imageBlock', {
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| 85 | allowAttributes: ['sources']
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| 86 | });
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| 87 | }
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| 88 | if (editor.plugins.has('ImageInlineEditing')) {
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| 89 | editor.model.schema.extend('imageInline', {
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| 90 | allowAttributes: ['sources']
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| 91 | });
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| 92 | }
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| 93 | this._setupConversion();
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| 94 | this._setupImageUploadEditingIntegration();
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| 95 | }
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| 96 | /**
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| 97 | * Configures conversion pipelines to support upcasting and downcasting images using the `<picture>` view element
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| 98 | * and the model `sources` attribute.
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| 99 | */
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| 100 | _setupConversion() {
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| 101 | const editor = this.editor;
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| 102 | const conversion = editor.conversion;
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| 103 | const imageUtils = editor.plugins.get('ImageUtils');
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| 104 | conversion.for('upcast').add(upcastPicture(imageUtils));
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| 105 | conversion.for('downcast').add(downcastSourcesAttribute(imageUtils));
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| 106 | }
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| 107 | /**
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| 108 | * Makes it possible for uploaded images to get the `sources` model attribute and the `<picture>...</picture>`
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| 109 | * view structure out-of-the-box if relevant data is provided along the
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| 110 | * {@link module:image/imageupload/imageuploadediting~ImageUploadEditing#event:uploadComplete} event.
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| 111 | */
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| 112 | _setupImageUploadEditingIntegration() {
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| 113 | const editor = this.editor;
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| 114 | if (!editor.plugins.has('ImageUploadEditing')) {
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| 115 | return;
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| 116 | }
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| 117 | const imageUploadEditing = editor.plugins.get('ImageUploadEditing');
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| 118 | this.listenTo(imageUploadEditing, 'uploadComplete', (evt, { imageElement, data }) => {
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| 119 | const sources = data.sources;
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| 120 | if (!sources) {
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| 121 | return;
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| 122 | }
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| 123 | editor.model.change(writer => {
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| 124 | writer.setAttributes({
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| 125 | sources
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| 126 | }, imageElement);
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| 127 | });
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| 128 | });
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| 129 | }
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| 130 | }
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