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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| import type {HTMLMarkdownElement, MarkdownTextInputElement} from '../../MarkdownTextInput.web'; | ||
| import {parseStyleToNumber} from '../../styleUtils'; | ||
| import type {PartialMarkdownStyle} from '../../styleUtils'; | ||
| import type {MarkdownRange} from '../utils/parserUtils'; | ||
| import type {TreeNode} from '../utils/treeUtils'; | ||
|
|
||
| function createLoadingIndicator(currentInput: MarkdownTextInputElement, url: string, markdownStyle: PartialMarkdownStyle) { | ||
| // Get current spinner animation progress if it exists | ||
| const currentSpinner = currentInput.querySelector(`[data-type="spinner"][data-url="${url}"]`)?.firstChild; | ||
| let currentTime: CSSNumberish = 0; | ||
| if (currentSpinner) { | ||
| const animation = (currentSpinner as HTMLMarkdownElement).getAnimations()[0]; | ||
| if (animation) { | ||
| currentTime = animation.currentTime || 0; | ||
| } | ||
| } | ||
|
|
||
| const container = document.createElement('span'); | ||
| container.contentEditable = 'false'; | ||
|
|
||
| const spinner = document.createElement('span'); | ||
| const spinnerStyles = markdownStyle.loadingIndicator; | ||
| if (spinnerStyles) { | ||
| const spinnerBorderWidth = spinnerStyles.borderWidth || 3; | ||
| Object.assign(spinner.style, { | ||
| border: `${spinnerBorderWidth}px solid ${String(spinnerStyles.secondaryColor)}`, | ||
| borderTop: `${spinnerBorderWidth}px solid ${String(spinnerStyles.primaryColor)}`, | ||
| borderRadius: '50%', | ||
| width: spinnerStyles.width || '20px', | ||
| height: spinnerStyles.height || '20px', | ||
| display: 'block', | ||
| animationPlayState: 'paused', | ||
| }); | ||
| } | ||
|
|
||
| const containerStyles = markdownStyle.loadingIndicatorContainer; | ||
| Object.assign(container.style, { | ||
| ...markdownStyle.loadingIndicatorContainer, | ||
| position: 'absolute', | ||
| bottom: '0', | ||
| left: '0', | ||
| width: containerStyles?.width || 'auto', | ||
| height: containerStyles?.height || 'auto', | ||
| display: 'flex', | ||
| justifyContent: 'center', | ||
| alignItems: 'center', | ||
| }); | ||
| container.setAttribute('data-type', 'spinner'); | ||
| container.setAttribute('data-url', url); | ||
| container.contentEditable = 'false'; | ||
| container.appendChild(spinner); | ||
|
|
||
| const keyframes = [{transform: 'rotate(0deg)'}, {transform: 'rotate(360deg)'}]; | ||
|
|
||
| const options = { | ||
| duration: 1000, | ||
| iterations: Infinity, | ||
| }; | ||
| const animation2 = spinner.animate(keyframes, options); | ||
| animation2.currentTime = currentTime; | ||
| return container; | ||
| } | ||
|
|
||
| /* Replaces element in the tree, that is beeing builded, with the element from the currently rendered input (with previous state) */ | ||
| function replaceElementInTreeNode(targetNode: TreeNode, newElement: HTMLMarkdownElement) { | ||
| // Clear newElement from its children | ||
| [...newElement.children].forEach((child) => { | ||
| child.remove(); | ||
| }); | ||
| newElement.remove(); | ||
|
|
||
| // Move all children from targetNode to newElement | ||
| [...targetNode.element.children].forEach((child) => { | ||
| newElement.appendChild(child); | ||
| }); | ||
| targetNode.element.remove(); | ||
|
|
||
| targetNode.parentNode?.element.appendChild(newElement); | ||
| return {...targetNode, element: newElement}; | ||
| } | ||
|
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| function getImageMeta(url: string, callback: (err: string | Event | null, img?: HTMLImageElement) => void) { | ||
| const img = new Image(); | ||
| img.onload = () => callback(null, img); | ||
| img.onerror = (err) => callback(err); | ||
| img.src = url; | ||
| } | ||
|
|
||
| /* The main function that adds inline image preview to the node */ | ||
| function addInlineImagePreview(currentInput: MarkdownTextInputElement, targetNode: TreeNode, text: string, ranges: MarkdownRange[], markdownStyle: PartialMarkdownStyle) { | ||
| const linkRange = ranges.find((r) => r.type === 'link'); | ||
| let imageHref = ''; | ||
| if (linkRange) { | ||
| imageHref = text.substring(linkRange.start, linkRange.start + linkRange.length); | ||
| } | ||
|
|
||
| // If the inline image markdown with the same href is already loaded, replace the targetNode with the already loaded preview | ||
| const alreadyLoadedPreview = currentInput.querySelector(`[data-image-href="${imageHref}"]`); | ||
| if (alreadyLoadedPreview) { | ||
| return replaceElementInTreeNode(targetNode, alreadyLoadedPreview as HTMLMarkdownElement); | ||
| } | ||
|
|
||
| // Add a loading spinner | ||
| const spinner = createLoadingIndicator(currentInput, imageHref, markdownStyle); | ||
| if (spinner) { | ||
| targetNode.element.appendChild(spinner); | ||
| } | ||
|
|
||
| const maxWidth = parseStyleToNumber(`${markdownStyle.inlineImage?.maxWidth}`); | ||
| const maxHeight = parseStyleToNumber(`${markdownStyle.inlineImage?.maxHeight}`); | ||
| const imageMarginTop = parseStyleToNumber(`${markdownStyle.inlineImage?.marginTop}`); | ||
| const imageMarginBottom = parseStyleToNumber(`${markdownStyle.inlineImage?.marginBottom}`); | ||
|
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||
| Object.assign(targetNode.element.style, { | ||
| display: 'block', | ||
| marginBottom: `${imageMarginBottom}px`, | ||
| paddingBottom: markdownStyle.loadingIndicatorContainer?.height || markdownStyle.loadingIndicator?.height || (!!markdownStyle.loadingIndicator && '30px') || undefined, | ||
| }); | ||
|
|
||
| getImageMeta(imageHref, (_err, img) => { | ||
| if (!img || _err) { | ||
| return; | ||
| } | ||
|
|
||
| // Verify if the current spinner is for the loaded image. If not, it means that the response came after the user changed the image url | ||
| const currentSpinner = currentInput.querySelector('[data-type="spinner"]'); | ||
| if (currentSpinner !== spinner) { | ||
| return; | ||
| } | ||
|
|
||
| // Remove the spinner | ||
| if (currentSpinner) { | ||
| currentSpinner.remove(); | ||
| } | ||
|
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| targetNode.element.setAttribute('data-image-href', imageHref); | ||
|
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||
| // Calcate the image preview size and apply styles | ||
| const {naturalWidth, naturalHeight} = img; | ||
| let width: number | null = null; | ||
| let height: number | null = null; | ||
|
|
||
| let paddingValue = 0; | ||
| if (naturalWidth > naturalHeight) { | ||
| width = Math.min(maxWidth, naturalWidth); | ||
| paddingValue = (width / naturalWidth) * naturalHeight; | ||
| } else { | ||
| height = Math.min(maxHeight, naturalHeight); | ||
| paddingValue = height; | ||
| } | ||
|
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| const widthSize = width ? `${width}px` : 'auto'; | ||
| const heightSize = height ? `${height}px` : 'auto'; | ||
|
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| Object.assign(targetNode.element.style, { | ||
| backgroundImage: `url("${imageHref}")`, | ||
| backgroundPosition: `bottom left`, | ||
| backgroundSize: `${widthSize} ${heightSize}`, | ||
| backgroundRepeat: `no-repeat`, | ||
| paddingBottom: `${imageMarginTop + paddingValue}px`, | ||
| }); | ||
| }); | ||
|
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||
| return targetNode; | ||
| } | ||
|
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||
| // eslint-disable-next-line import/prefer-default-export | ||
| export {addInlineImagePreview}; |
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