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