a3cfe6f39b
Support pasting URLs over selection text in the textarea editor. Does not work in EasyMDE and I don't intend to support it. Image paste works as usual in both Textarea and EasyMDE. The new `replaceTextareaSelection` function changes textarea content via [`insertText`](https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand#using_inserttext) command, which preserves history, e.g. `CTRL-Z` works and is also demostrated below. We should later refactor the image paste code to use the same function because it currently destroys history. Overriding the formatting via `Shift` key is supported as well, e.g. `Ctrl+Shift+V` will insert the URL as-is, like on GitHub. 
319 lines
12 KiB
JavaScript
319 lines
12 KiB
JavaScript
import '@github/markdown-toolbar-element';
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import '@github/text-expander-element';
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import $ from 'jquery';
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import {attachTribute} from '../tribute.js';
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import {hideElem, showElem, autosize, isElemVisible} from '../../utils/dom.js';
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import {initEasyMDEPaste, initTextareaPaste} from './Paste.js';
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import {handleGlobalEnterQuickSubmit} from './QuickSubmit.js';
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import {renderPreviewPanelContent} from '../repo-editor.js';
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import {easyMDEToolbarActions} from './EasyMDEToolbarActions.js';
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import {initTextExpander} from './TextExpander.js';
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import {showErrorToast} from '../../modules/toast.js';
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import {POST} from '../../modules/fetch.js';
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let elementIdCounter = 0;
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/**
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* validate if the given textarea is non-empty.
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* @param {HTMLElement} textarea - The textarea element to be validated.
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* @returns {boolean} returns true if validation succeeded.
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*/
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export function validateTextareaNonEmpty(textarea) {
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// When using EasyMDE, the original edit area HTML element is hidden, breaking HTML5 input validation.
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// The workaround (https://github.com/sparksuite/simplemde-markdown-editor/issues/324) doesn't work with contenteditable, so we just show an alert.
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if (!textarea.value) {
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if (isElemVisible(textarea)) {
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textarea.required = true;
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const form = textarea.closest('form');
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form?.reportValidity();
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} else {
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// The alert won't hurt users too much, because we are dropping the EasyMDE and the check only occurs in a few places.
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showErrorToast('Require non-empty content');
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}
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return false;
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}
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return true;
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}
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class ComboMarkdownEditor {
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constructor(container, options = {}) {
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container._giteaComboMarkdownEditor = this;
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this.options = options;
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this.container = container;
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}
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async init() {
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this.prepareEasyMDEToolbarActions();
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this.setupContainer();
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this.setupTab();
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this.setupDropzone();
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this.setupTextarea();
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await this.switchToUserPreference();
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}
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applyEditorHeights(el, heights) {
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if (!heights) return;
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if (heights.minHeight) el.style.minHeight = heights.minHeight;
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if (heights.height) el.style.height = heights.height;
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if (heights.maxHeight) el.style.maxHeight = heights.maxHeight;
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}
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setupContainer() {
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initTextExpander(this.container.querySelector('text-expander'));
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this.container.addEventListener('ce-editor-content-changed', (e) => this.options?.onContentChanged?.(this, e));
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}
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setupTextarea() {
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this.textarea = this.container.querySelector('.markdown-text-editor');
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this.textarea._giteaComboMarkdownEditor = this;
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this.textarea.id = `_combo_markdown_editor_${String(elementIdCounter++)}`;
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this.textarea.addEventListener('input', (e) => this.options?.onContentChanged?.(this, e));
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this.applyEditorHeights(this.textarea, this.options.editorHeights);
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if (this.textarea.getAttribute('data-disable-autosize') !== 'true') {
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this.textareaAutosize = autosize(this.textarea, {viewportMarginBottom: 130});
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}
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this.textareaMarkdownToolbar = this.container.querySelector('markdown-toolbar');
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this.textareaMarkdownToolbar.setAttribute('for', this.textarea.id);
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for (const el of this.textareaMarkdownToolbar.querySelectorAll('.markdown-toolbar-button')) {
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// upstream bug: The role code is never executed in base MarkdownButtonElement https://github.com/github/markdown-toolbar-element/issues/70
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el.setAttribute('role', 'button');
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// the editor usually is in a form, so the buttons should have "type=button", avoiding conflicting with the form's submit.
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if (el.nodeName === 'BUTTON' && !el.getAttribute('type')) el.setAttribute('type', 'button');
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}
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this.textarea.addEventListener('keydown', (e) => {
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if (e.shiftKey) {
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e.target._shiftDown = true;
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}
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});
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this.textarea.addEventListener('keyup', (e) => {
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if (!e.shiftKey) {
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e.target._shiftDown = false;
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}
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});
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const monospaceButton = this.container.querySelector('.markdown-switch-monospace');
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const monospaceEnabled = localStorage?.getItem('markdown-editor-monospace') === 'true';
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const monospaceText = monospaceButton.getAttribute(monospaceEnabled ? 'data-disable-text' : 'data-enable-text');
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monospaceButton.setAttribute('data-tooltip-content', monospaceText);
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monospaceButton.setAttribute('aria-checked', String(monospaceEnabled));
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monospaceButton?.addEventListener('click', (e) => {
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e.preventDefault();
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const enabled = localStorage?.getItem('markdown-editor-monospace') !== 'true';
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localStorage.setItem('markdown-editor-monospace', String(enabled));
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this.textarea.classList.toggle('gt-mono', enabled);
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const text = monospaceButton.getAttribute(enabled ? 'data-disable-text' : 'data-enable-text');
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monospaceButton.setAttribute('data-tooltip-content', text);
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monospaceButton.setAttribute('aria-checked', String(enabled));
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});
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const easymdeButton = this.container.querySelector('.markdown-switch-easymde');
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easymdeButton?.addEventListener('click', async (e) => {
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e.preventDefault();
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this.userPreferredEditor = 'easymde';
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await this.switchToEasyMDE();
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});
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if (this.dropzone) {
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initTextareaPaste(this.textarea, this.dropzone);
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}
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}
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setupDropzone() {
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const dropzoneParentContainer = this.container.getAttribute('data-dropzone-parent-container');
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if (dropzoneParentContainer) {
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this.dropzone = this.container.closest(this.container.getAttribute('data-dropzone-parent-container'))?.querySelector('.dropzone');
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}
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}
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setupTab() {
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const $container = $(this.container);
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const $tabMenu = $container.find('.tabular.menu');
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const $tabs = $tabMenu.find('> .item');
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// Fomantic Tab requires the "data-tab" to be globally unique.
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// So here it uses our defined "data-tab-for" and "data-tab-panel" to generate the "data-tab" attribute for Fomantic.
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const $tabEditor = $tabs.filter(`.item[data-tab-for="markdown-writer"]`);
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const $tabPreviewer = $tabs.filter(`.item[data-tab-for="markdown-previewer"]`);
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$tabEditor.attr('data-tab', `markdown-writer-${elementIdCounter}`);
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$tabPreviewer.attr('data-tab', `markdown-previewer-${elementIdCounter}`);
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const $panelEditor = $container.find('.ui.tab[data-tab-panel="markdown-writer"]');
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const $panelPreviewer = $container.find('.ui.tab[data-tab-panel="markdown-previewer"]');
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$panelEditor.attr('data-tab', `markdown-writer-${elementIdCounter}`);
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$panelPreviewer.attr('data-tab', `markdown-previewer-${elementIdCounter}`);
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elementIdCounter++;
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$tabEditor[0].addEventListener('click', () => {
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requestAnimationFrame(() => {
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this.focus();
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});
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});
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$tabs.tab();
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this.previewUrl = $tabPreviewer.attr('data-preview-url');
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this.previewContext = $tabPreviewer.attr('data-preview-context');
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this.previewMode = this.options.previewMode ?? 'comment';
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this.previewWiki = this.options.previewWiki ?? false;
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$tabPreviewer.on('click', async () => {
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const formData = new FormData();
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formData.append('mode', this.previewMode);
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formData.append('context', this.previewContext);
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formData.append('text', this.value());
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formData.append('wiki', this.previewWiki);
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const response = await POST(this.previewUrl, {data: formData});
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const data = await response.text();
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renderPreviewPanelContent($panelPreviewer, data);
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});
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}
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prepareEasyMDEToolbarActions() {
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this.easyMDEToolbarDefault = [
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'bold', 'italic', 'strikethrough', '|', 'heading-1', 'heading-2', 'heading-3',
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'heading-bigger', 'heading-smaller', '|', 'code', 'quote', '|', 'gitea-checkbox-empty',
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'gitea-checkbox-checked', '|', 'unordered-list', 'ordered-list', '|', 'link', 'image',
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'table', 'horizontal-rule', '|', 'gitea-switch-to-textarea',
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];
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}
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parseEasyMDEToolbar(EasyMDE, actions) {
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this.easyMDEToolbarActions = this.easyMDEToolbarActions || easyMDEToolbarActions(EasyMDE, this);
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const processed = [];
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for (const action of actions) {
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const actionButton = this.easyMDEToolbarActions[action];
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if (!actionButton) throw new Error(`Unknown EasyMDE toolbar action ${action}`);
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processed.push(actionButton);
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}
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return processed;
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}
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async switchToUserPreference() {
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if (this.userPreferredEditor === 'easymde') {
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await this.switchToEasyMDE();
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} else {
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this.switchToTextarea();
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}
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}
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switchToTextarea() {
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if (!this.easyMDE) return;
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showElem(this.textareaMarkdownToolbar);
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if (this.easyMDE) {
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this.easyMDE.toTextArea();
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this.easyMDE = null;
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}
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}
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async switchToEasyMDE() {
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if (this.easyMDE) return;
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// EasyMDE's CSS should be loaded via webpack config, otherwise our own styles can not overwrite the default styles.
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const {default: EasyMDE} = await import(/* webpackChunkName: "easymde" */'easymde');
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const easyMDEOpt = {
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autoDownloadFontAwesome: false,
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element: this.textarea,
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forceSync: true,
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renderingConfig: {singleLineBreaks: false},
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indentWithTabs: false,
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tabSize: 4,
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spellChecker: false,
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inputStyle: 'contenteditable', // nativeSpellcheck requires contenteditable
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nativeSpellcheck: true,
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...this.options.easyMDEOptions,
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};
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easyMDEOpt.toolbar = this.parseEasyMDEToolbar(EasyMDE, easyMDEOpt.toolbar ?? this.easyMDEToolbarDefault);
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this.easyMDE = new EasyMDE(easyMDEOpt);
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this.easyMDE.codemirror.on('change', (...args) => {this.options?.onContentChanged?.(this, ...args)});
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this.easyMDE.codemirror.setOption('extraKeys', {
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'Cmd-Enter': (cm) => handleGlobalEnterQuickSubmit(cm.getTextArea()),
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'Ctrl-Enter': (cm) => handleGlobalEnterQuickSubmit(cm.getTextArea()),
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Enter: (cm) => {
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const tributeContainer = document.querySelector('.tribute-container');
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if (!tributeContainer || tributeContainer.style.display === 'none') {
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cm.execCommand('newlineAndIndent');
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}
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},
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Up: (cm) => {
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const tributeContainer = document.querySelector('.tribute-container');
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if (!tributeContainer || tributeContainer.style.display === 'none') {
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return cm.execCommand('goLineUp');
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}
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},
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Down: (cm) => {
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const tributeContainer = document.querySelector('.tribute-container');
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if (!tributeContainer || tributeContainer.style.display === 'none') {
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return cm.execCommand('goLineDown');
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}
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},
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});
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this.applyEditorHeights(this.container.querySelector('.CodeMirror-scroll'), this.options.editorHeights);
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await attachTribute(this.easyMDE.codemirror.getInputField(), {mentions: true, emoji: true});
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initEasyMDEPaste(this.easyMDE, this.dropzone);
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hideElem(this.textareaMarkdownToolbar);
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}
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value(v = undefined) {
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if (v === undefined) {
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if (this.easyMDE) {
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return this.easyMDE.value();
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}
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return this.textarea.value;
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}
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if (this.easyMDE) {
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this.easyMDE.value(v);
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} else {
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this.textarea.value = v;
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}
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this.textareaAutosize?.resizeToFit();
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}
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focus() {
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if (this.easyMDE) {
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this.easyMDE.codemirror.focus();
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} else {
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this.textarea.focus();
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}
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}
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moveCursorToEnd() {
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this.textarea.focus();
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this.textarea.setSelectionRange(this.textarea.value.length, this.textarea.value.length);
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if (this.easyMDE) {
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this.easyMDE.codemirror.focus();
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this.easyMDE.codemirror.setCursor(this.easyMDE.codemirror.lineCount(), 0);
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}
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}
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get userPreferredEditor() {
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return window.localStorage.getItem(`markdown-editor-${this.options.useScene ?? 'default'}`);
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}
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set userPreferredEditor(s) {
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window.localStorage.setItem(`markdown-editor-${this.options.useScene ?? 'default'}`, s);
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}
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}
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export function getComboMarkdownEditor(el) {
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if (el instanceof $) el = el[0];
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return el?._giteaComboMarkdownEditor;
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}
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export async function initComboMarkdownEditor(container, options = {}) {
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if (container instanceof $) {
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if (container.length !== 1) {
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throw new Error('initComboMarkdownEditor: container must be a single element');
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}
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container = container[0];
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}
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if (!container) {
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throw new Error('initComboMarkdownEditor: container is null');
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}
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const editor = new ComboMarkdownEditor(container, options);
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await editor.init();
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return editor;
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}
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