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af28ce59b8
There were some missing features from EasyMDE: 1. H1 - H3 style 2. Auto add task list 3. Insert a table And added some tests
188 lines
6.3 KiB
TypeScript
188 lines
6.3 KiB
TypeScript
import {imageInfo} from '../../utils/image.ts';
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import {replaceTextareaSelection} from '../../utils/dom.ts';
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import {isUrl} from '../../utils/url.ts';
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import {textareaInsertText, triggerEditorContentChanged} from './EditorMarkdown.ts';
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import {
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DropzoneCustomEventRemovedFile,
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DropzoneCustomEventUploadDone,
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generateMarkdownLinkForAttachment,
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} from '../dropzone.ts';
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import type CodeMirror from 'codemirror';
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let uploadIdCounter = 0;
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export const EventUploadStateChanged = 'ce-upload-state-changed';
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export function triggerUploadStateChanged(target) {
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target.dispatchEvent(new CustomEvent(EventUploadStateChanged, {bubbles: true}));
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}
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function uploadFile(dropzoneEl, file) {
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return new Promise((resolve) => {
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const curUploadId = uploadIdCounter++;
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file._giteaUploadId = curUploadId;
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const dropzoneInst = dropzoneEl.dropzone;
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const onUploadDone = ({file}) => {
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if (file._giteaUploadId === curUploadId) {
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dropzoneInst.off(DropzoneCustomEventUploadDone, onUploadDone);
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resolve(file);
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}
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};
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dropzoneInst.on(DropzoneCustomEventUploadDone, onUploadDone);
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dropzoneInst.handleFiles([file]);
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});
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}
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class TextareaEditor {
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editor : HTMLTextAreaElement;
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constructor(editor) {
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this.editor = editor;
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}
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insertPlaceholder(value) {
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textareaInsertText(this.editor, value);
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}
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replacePlaceholder(oldVal, newVal) {
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const editor = this.editor;
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const startPos = editor.selectionStart;
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const endPos = editor.selectionEnd;
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if (editor.value.substring(startPos, endPos) === oldVal) {
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editor.value = editor.value.substring(0, startPos) + newVal + editor.value.substring(endPos);
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editor.selectionEnd = startPos + newVal.length;
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} else {
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editor.value = editor.value.replace(oldVal, newVal);
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editor.selectionEnd -= oldVal.length;
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editor.selectionEnd += newVal.length;
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}
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editor.selectionStart = editor.selectionEnd;
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editor.focus();
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triggerEditorContentChanged(editor);
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}
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}
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class CodeMirrorEditor {
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editor: CodeMirror.EditorFromTextArea;
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constructor(editor) {
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this.editor = editor;
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}
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insertPlaceholder(value) {
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const editor = this.editor;
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const startPoint = editor.getCursor('start');
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const endPoint = editor.getCursor('end');
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editor.replaceSelection(value);
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endPoint.ch = startPoint.ch + value.length;
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editor.setSelection(startPoint, endPoint);
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editor.focus();
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triggerEditorContentChanged(editor.getTextArea());
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}
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replacePlaceholder(oldVal, newVal) {
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const editor = this.editor;
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const endPoint = editor.getCursor('end');
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if (editor.getSelection() === oldVal) {
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editor.replaceSelection(newVal);
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} else {
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editor.setValue(editor.getValue().replace(oldVal, newVal));
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}
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endPoint.ch -= oldVal.length;
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endPoint.ch += newVal.length;
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editor.setSelection(endPoint, endPoint);
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editor.focus();
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triggerEditorContentChanged(editor.getTextArea());
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}
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}
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async function handleUploadFiles(editor, dropzoneEl, files, e) {
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e.preventDefault();
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for (const file of files) {
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const name = file.name.slice(0, file.name.lastIndexOf('.'));
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const {width, dppx} = await imageInfo(file);
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const placeholder = `[${name}](uploading ...)`;
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editor.insertPlaceholder(placeholder);
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await uploadFile(dropzoneEl, file); // the "file" will get its "uuid" during the upload
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editor.replacePlaceholder(placeholder, generateMarkdownLinkForAttachment(file, {width, dppx}));
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}
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}
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export function removeAttachmentLinksFromMarkdown(text, fileUuid) {
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text = text.replace(new RegExp(`!?\\[([^\\]]+)\\]\\(/?attachments/${fileUuid}\\)`, 'g'), '');
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text = text.replace(new RegExp(`<img[^>]+src="/?attachments/${fileUuid}"[^>]*>`, 'g'), '');
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return text;
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}
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function handleClipboardText(textarea, e, {text, isShiftDown}) {
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// pasting with "shift" means "paste as original content" in most applications
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if (isShiftDown) return; // let the browser handle it
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// when pasting links over selected text, turn it into [text](link)
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const {value, selectionStart, selectionEnd} = textarea;
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const selectedText = value.substring(selectionStart, selectionEnd);
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const trimmedText = text.trim();
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if (selectedText && isUrl(trimmedText) && !isUrl(selectedText)) {
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e.preventDefault();
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replaceTextareaSelection(textarea, `[${selectedText}](${trimmedText})`);
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}
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// else, let the browser handle it
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}
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// extract text and images from "paste" event
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function getPastedContent(e) {
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const images = [];
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for (const item of e.clipboardData?.items ?? []) {
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if (item.type?.startsWith('image/')) {
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images.push(item.getAsFile());
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}
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}
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const text = e.clipboardData?.getData?.('text') ?? '';
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return {text, images};
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}
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export function initEasyMDEPaste(easyMDE, dropzoneEl) {
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const editor = new CodeMirrorEditor(easyMDE.codemirror);
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easyMDE.codemirror.on('paste', (_, e) => {
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const {images} = getPastedContent(e);
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if (!images.length) return;
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handleUploadFiles(editor, dropzoneEl, images, e);
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});
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easyMDE.codemirror.on('drop', (_, e) => {
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if (!e.dataTransfer.files.length) return;
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handleUploadFiles(editor, dropzoneEl, e.dataTransfer.files, e);
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});
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dropzoneEl.dropzone.on(DropzoneCustomEventRemovedFile, ({fileUuid}) => {
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const oldText = easyMDE.codemirror.getValue();
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const newText = removeAttachmentLinksFromMarkdown(oldText, fileUuid);
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if (oldText !== newText) easyMDE.codemirror.setValue(newText);
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});
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}
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export function initTextareaEvents(textarea, dropzoneEl) {
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let isShiftDown = false;
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textarea.addEventListener('keydown', (e) => {
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if (e.shiftKey) isShiftDown = true;
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});
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textarea.addEventListener('keyup', (e) => {
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if (!e.shiftKey) isShiftDown = false;
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});
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textarea.addEventListener('paste', (e) => {
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const {images, text} = getPastedContent(e);
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if (images.length && dropzoneEl) {
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handleUploadFiles(new TextareaEditor(textarea), dropzoneEl, images, e);
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} else if (text) {
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handleClipboardText(textarea, e, {text, isShiftDown});
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}
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});
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textarea.addEventListener('drop', (e) => {
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if (!e.dataTransfer.files.length) return;
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handleUploadFiles(new TextareaEditor(textarea), dropzoneEl, e.dataTransfer.files, e);
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});
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dropzoneEl?.dropzone.on(DropzoneCustomEventRemovedFile, ({fileUuid}) => {
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const newText = removeAttachmentLinksFromMarkdown(textarea.value, fileUuid);
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if (textarea.value !== newText) textarea.value = newText;
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});
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}
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