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import $ from 'jquery';
import Shortcuts from '~/behaviors/shortcuts/shortcuts';
import { insertText } from '~/lib/utils/common_utils';
import axios from '~/lib/utils/axios_utils';
const LINK_TAG_PATTERN = '[{text}](url)';
const INDENT_CHAR = ' ';
const INDENT_LENGTH = 2;
// at the start of a line, find any amount of whitespace followed by
// a bullet point character (*+-) and an optional checkbox ([ ] [x])
// OR a number with a . after it and an optional checkbox ([ ] [x])
// followed by one or more whitespace characters
const LIST_LINE_HEAD_PATTERN = /^(?<indent>\s*)(?<leader>((?<isUl>[*+-])|(?<isOl>\d+\.))( \[([xX~\s])\])?\s)(?<content>.)?/;
// detect a horizontal rule that might be mistaken for a list item (not full pattern for an <hr>)
const HR_PATTERN = /^((\s{0,3}-+\s*-+\s*-+\s*[\s-]*)|(\s{0,3}\*+\s*\*+\s*\*+\s*[\s*]*))$/;
let compositioningNoteText = false;
function selectedText(text, textarea) {
return text.substring(textarea.selectionStart, textarea.selectionEnd);
}
function addBlockTags(blockTag, selected) {
return `${blockTag}\n${selected}\n${blockTag}`;
}
/**
* Returns the line of text that is before the first line
* of the current selection
*
* @param {String} text - the text of the targeted text area
* @param {Object} textArea - the targeted text area
* @returns {String}
*/
function lineBeforeSelection(text, textArea) {
let split = text.substring(0, textArea.selectionStart);
split = split.split('\n');
// Last item, at -1, is the line where the start of selection is.
// Line before selection is therefore at -2
const lineBefore = split[split.length - 2];
return lineBefore === undefined ? '' : lineBefore;
}
/**
* Returns the line of text that is after the last line
* of the current selection
*
* @param {String} text - the text of the targeted text area
* @param {Object} textArea - the targeted text area
* @returns {String}
*/
function lineAfterSelection(text, textArea) {
let split = text.substring(textArea.selectionEnd);
// remove possible leading newline to get at the real line
split = split.replace(/^\n/, '');
split = split.split('\n');
return split[0];
}
/**
* Returns the text lines that encompass the current selection
*
* @param {Object} textArea - the targeted text area
* @returns {Object}
*/
function linesFromSelection(textArea) {
const text = textArea.value;
const { selectionStart, selectionEnd } = textArea;
let startPos = text[selectionStart] === '\n' ? selectionStart - 1 : selectionStart;
startPos = text.lastIndexOf('\n', startPos) + 1;
let endPos = selectionEnd === selectionStart ? selectionEnd : selectionEnd - 1;
endPos = text.indexOf('\n', endPos);
if (endPos < 0) endPos = text.length;
const selectedRange = text.substring(startPos, endPos);
const lines = selectedRange.split('\n');
return {
lines,
selectionStart,
selectionEnd,
startPos,
endPos,
};
}
/**
* Set the selection of a textarea such that it maintains the
* previous selection before the lines were indented/outdented
*
* @param {Object} textArea - the targeted text area
* @param {Number} selectionStart - start position of original selection
* @param {Number} selectionEnd - end position of original selection
* @param {Number} lineStart - start pos of first line
* @param {Number} firstLineChange - number of characters changed on first line
* @param {Number} totalChanged - total number of characters changed
*/
function setNewSelectionRange(
textArea,
selectionStart,
selectionEnd,
lineStart,
firstLineChange,
totalChanged,
) {
let newStart = Math.max(lineStart, selectionStart + firstLineChange);
let newEnd = Math.max(lineStart, selectionEnd + totalChanged);
if (selectionStart === selectionEnd) {
newEnd = newStart;
} else if (selectionStart === lineStart) {
newStart = lineStart;
}
textArea.setSelectionRange(newStart, newEnd);
}
function convertMonacoSelectionToAceFormat(sel) {
return {
start: {
row: sel.startLineNumber,
column: sel.startColumn,
},
end: {
row: sel.endLineNumber,
column: sel.endColumn,
},
};
}
function getEditorSelectionRange(editor) {
return convertMonacoSelectionToAceFormat(editor.getSelection());
}
function editorBlockTagText(text, blockTag, selected, editor) {
const lines = text.split('\n');
const selectionRange = getEditorSelectionRange(editor);
const shouldRemoveBlock =
lines[selectionRange.start.row - 1] === blockTag &&
lines[selectionRange.end.row + 1] === blockTag;
if (shouldRemoveBlock) {
Eif (blockTag !== null) {
const lastLine = lines[selectionRange.end.row + 1];
const rangeWithBlockTags = new Range(
lines[selectionRange.start.row - 1],
0,
selectionRange.end.row + 1,
lastLine.length,
);
editor.getSelection().setSelectionRange(rangeWithBlockTags);
}
return selected;
}
return addBlockTags(blockTag, selected);
}
function blockTagText(text, textArea, blockTag, selected) {
const shouldRemoveBlock =
lineBeforeSelection(text, textArea) === blockTag &&
lineAfterSelection(text, textArea) === blockTag;
if (shouldRemoveBlock) {
// To remove the block tag we have to select the line before & after
Eif (blockTag != null) {
textArea.selectionStart = textArea.selectionStart - (blockTag.length + 1);
textArea.selectionEnd = textArea.selectionEnd + (blockTag.length + 1);
}
return selected;
}
return addBlockTags(blockTag, selected);
}
function moveCursor({
textArea,
tag,
cursorOffset,
positionBetweenTags,
removedLastNewLine,
select,
editor,
editorSelectionStart,
editorSelectionEnd,
}) {
let pos;
Iif (textArea && !textArea.setSelectionRange) {
return;
}
if (select && select.length > 0) {
Eif (textArea) {
// calculate the part of the text to be selected
const startPosition = textArea.selectionStart - (tag.length - tag.indexOf(select));
const endPosition = startPosition + select.length;
return textArea.setSelectionRange(startPosition, endPosition);
}
if (editor) {
editor.selectWithinSelection(select, tag);
return;
}
}
if (textArea) {
Eif (textArea.selectionStart === textArea.selectionEnd) {
if (positionBetweenTags) {
pos = textArea.selectionStart - tag.length;
} else {
pos = textArea.selectionStart;
}
Iif (removedLastNewLine) {
pos -= 1;
}
Iif (cursorOffset) {
pos -= cursorOffset;
}
return textArea.setSelectionRange(pos, pos);
}
} else if (editor && editorSelectionStart.row === editorSelectionEnd.row) {
Eif (positionBetweenTags) {
editor.moveCursor(tag.length * -1);
}
}
}
/**
* Inserts the given MarkdownText into the given textArea or editor
*
* WARNING: This is a bit of legacy code that has some complicated logic.
* There are a lot of hidden contexts to consider here. Please proceed with caution.
*
* We've tried to document the parameter responsibilities as best as possible.
* Please look for actual usage in the code to verify any assumptions.
*
* @param {Object} options - Named parameters
* @param {HTMLTextAreaElement} options.textArea - The relevant text area
* @param {String} options.text - The current text of the text area
* @param {String} options.tag - The markdown tag we want to enter (Example: `- [ ] ` for lists)
* @param {Number} options.cursorOffset - Applied to the position after we insert the text (moves backward)
* @param {String} options.blockTag - The markdown tag to use if a block is detected (Example ` ``` ` vs. ` ` `)
* @param {Boolean} options.wrap - Flag for whether the tag is a wrapping tag (Example `**text**` vs `* text`)
* @param {String} options.select - The text to select after inserting (Example `url` of `({text})[url]`)
* @param {Object} options.editor - The instance of the SourceEditor which we are inserting MarkdownText into. This should be mutually exclusive with textArea.
*/
export function insertMarkdownText({
textArea,
text,
tag,
cursorOffset,
blockTag,
selected = '',
wrap,
select,
editor,
}) {
// If we aren't really inserting anything, let's just noop.
// Let's check for `selected` too because there might be hidden logic that actually
// is expected to run for this case.
if (!tag && !blockTag && !selected) {
return;
}
let removedLastNewLine = false;
let removedFirstNewLine = false;
let currentLineEmpty = false;
let editorSelectionStart;
let editorSelectionEnd;
let lastNewLine;
let textToInsert;
selected = selected.toString();
if (editor) {
const selectionRange = getEditorSelectionRange(editor);
editorSelectionStart = selectionRange.start;
editorSelectionEnd = selectionRange.end;
}
// check for link pattern and selected text is an URL
// if so fill in the url part instead of the text part of the pattern.
if (tag === LINK_TAG_PATTERN) {
Eif (URL) {
try {
const url = new URL(selected);
if (url.origin !== 'null' || url.origin === null) {
tag = '[text]({text})';
select = 'text';
}
} catch (e) {
// ignore - no valid url
}
}
}
// Remove the first newline
Iif (selected.indexOf('\n') === 0) {
removedFirstNewLine = true;
selected = selected.replace(/\n+/, '');
}
// Remove the last newline
if (textArea) {
Iif (textArea.selectionEnd - textArea.selectionStart > selected.replace(/\n$/, '').length) {
removedLastNewLine = true;
selected = selected.replace(/\n$/, '');
}
} else Eif (editor) {
if (editorSelectionStart.row !== editorSelectionEnd.row) {
removedLastNewLine = true;
selected = selected.replace(/\n$/, '');
}
}
const selectedSplit = selected.split('\n');
if (editor && !wrap) {
lastNewLine = editor.getValue().split('\n')[editorSelectionStart.row];
Iif (/^\s*$/.test(lastNewLine)) {
currentLineEmpty = true;
}
} else if (textArea && !wrap) {
lastNewLine = textArea.value.substr(0, textArea.selectionStart).lastIndexOf('\n');
// Check whether the current line is empty or consists only of spaces(=handle as empty)
if (/^\s*$/.test(textArea.value.substring(lastNewLine, textArea.selectionStart))) {
currentLineEmpty = true;
}
}
const isBeginning =
(textArea && textArea.selectionStart === 0) ||
(editor && editorSelectionStart.column === 0 && editorSelectionStart.row === 0);
const startChar = !wrap && !currentLineEmpty && !isBeginning ? '\n' : '';
const textPlaceholder = '{text}';
if (selectedSplit.length > 1 && (!wrap || (blockTag != null && blockTag !== ''))) {
if (blockTag != null && blockTag !== '') {
textToInsert = editor
? editorBlockTagText(text, blockTag, selected, editor)
: blockTagText(text, textArea, blockTag, selected);
} else {
textToInsert = selectedSplit
.map((val) => {
Iif (tag.indexOf(textPlaceholder) > -1) {
return tag.replace(textPlaceholder, val);
}
Iif (val.indexOf(tag) === 0) {
return String(val.replace(tag, ''));
}
return String(tag) + val;
})
.join('\n');
}
} else if (tag.indexOf(textPlaceholder) > -1) {
textToInsert = tag.replace(textPlaceholder, () =>
selected.replace(/\\n/g, '\n').replace(/%br/g, '\\n'),
);
} else {
textToInsert = String(startChar) + tag + selected + (wrap ? tag : '');
}
Iif (removedFirstNewLine) {
textToInsert = `\n${textToInsert}`;
}
if (removedLastNewLine) {
textToInsert += '\n';
}
if (editor) {
editor.replaceSelectedText(textToInsert, select);
} else {
insertText(textArea, textToInsert);
}
moveCursor({
textArea,
tag: tag.replace(textPlaceholder, selected),
cursorOffset,
positionBetweenTags: wrap && selected.length === 0,
removedLastNewLine,
select,
editor,
editorSelectionStart,
editorSelectionEnd,
});
}
export function updateText({ textArea, tag, cursorOffset, blockTag, wrap, select, tagContent }) {
const $textArea = $(textArea);
textArea = $textArea.get(0);
const text = $textArea.val();
const selected = selectedText(text, textArea) || tagContent;
textArea.focus();
insertMarkdownText({
textArea,
text,
tag,
cursorOffset,
blockTag,
selected,
wrap,
select,
});
textArea.click();
}
/**
* Indents selected lines to the right by 2 spaces
*
* @param {Object} textArea - jQuery object with the targeted text area
*/
function indentLines($textArea) {
const textArea = $textArea.get(0);
const { lines, selectionStart, selectionEnd, startPos, endPos } = linesFromSelection(textArea);
const shiftedLines = [];
let totalAdded = 0;
textArea.focus();
textArea.setSelectionRange(startPos, endPos);
lines.forEach((line) => {
line = INDENT_CHAR.repeat(INDENT_LENGTH) + line;
totalAdded += INDENT_LENGTH;
shiftedLines.push(line);
});
const textToInsert = shiftedLines.join('\n');
insertText(textArea, textToInsert);
setNewSelectionRange(textArea, selectionStart, selectionEnd, startPos, INDENT_LENGTH, totalAdded);
}
/**
* Outdents selected lines to the left by 2 spaces
*
* @param {Object} textArea - the targeted text area
*/
function outdentLines($textArea) {
const textArea = $textArea.get(0);
const { lines, selectionStart, selectionEnd, startPos, endPos } = linesFromSelection(textArea);
const shiftedLines = [];
let totalRemoved = 0;
let removedFromFirstline = -1;
let removedFromLine = 0;
textArea.focus();
textArea.setSelectionRange(startPos, endPos);
lines.forEach((line) => {
removedFromLine = 0;
if (line.length > 0) {
// need to count how many spaces are actually removed, so can't use `replace`
while (removedFromLine < INDENT_LENGTH && line[removedFromLine] === INDENT_CHAR) {
removedFromLine += 1;
}
Eif (removedFromLine > 0) {
line = line.slice(removedFromLine);
totalRemoved += removedFromLine;
}
}
if (removedFromFirstline === -1) removedFromFirstline = removedFromLine;
shiftedLines.push(line);
});
const textToInsert = shiftedLines.join('\n');
if (totalRemoved > 0) insertText(textArea, textToInsert);
setNewSelectionRange(
textArea,
selectionStart,
selectionEnd,
startPos,
-removedFromFirstline,
-totalRemoved,
);
}
/* eslint-disable @gitlab/require-i18n-strings */
function handleSurroundSelectedText(e, textArea) {
if (!gon.markdown_surround_selection) return;
Iif (e.metaKey || e.ctrlKey) return;
Iif (textArea.selectionStart === textArea.selectionEnd) return;
const keys = {
'*': '**{text}**', // wraps with bold character
_: '_{text}_', // wraps with italic character
'`': '`{text}`', // wraps with inline character
"'": "'{text}'", // single quotes
'"': '"{text}"', // double quotes
'[': '[{text}]', // brackets
'{': '{{text}}', // braces
'(': '({text})', // parentheses
'<': '<{text}>', // angle brackets
};
const tag = keys[e.key];
Eif (tag) {
e.preventDefault();
updateText({
tag,
textArea,
blockTag: '',
wrap: true,
select: '',
tagContent: '',
});
}
}
/* eslint-enable @gitlab/require-i18n-strings */
/**
* Returns the content for a new line following a list item.
*
* @param {Object} listLineMatch - regex match of the current line
* @param {Object?} nextLineMatch - regex match of the next line
* @returns string with the new list item
*/
function continueOlText(listLineMatch, nextLineMatch) {
const { indent, leader } = listLineMatch.groups;
const { indent: nextIndent, isOl: nextIsOl } = nextLineMatch?.groups ?? {};
const [numStr, postfix = ''] = leader.split('.');
const incrementBy = nextIsOl && nextIndent === indent ? 0 : 1;
const num = parseInt(numStr, 10) + incrementBy;
return `${indent}${num}.${postfix}`;
}
function handleContinueList(e, textArea) {
if (!gon.markdown_automatic_lists) return;
Iif (!(e.key === 'Enter')) return;
Iif (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) return;
Iif (textArea.selectionStart !== textArea.selectionEnd) return;
// prevent unintended line breaks inserted using Japanese IME on MacOS
if (compositioningNoteText) return;
const selectedLines = linesFromSelection(textArea);
const firstSelectedLine = selectedLines.lines[0];
const listLineMatch = firstSelectedLine.match(LIST_LINE_HEAD_PATTERN);
if (listLineMatch) {
const { leader, indent, content, isOl } = listLineMatch.groups;
const emptyListItem = !content;
const prefixLength = leader.length + indent.length;
if (selectedLines.selectionStart - selectedLines.startPos < prefixLength) {
// cursor in the indent/leader area, allow the natural line feed to be added
return;
}
if (emptyListItem) {
// erase empty list item - select the text and allow the
// natural line feed to erase the text
textArea.selectionStart = textArea.selectionStart - listLineMatch[0].length;
return;
}
let itemToInsert;
// Behaviors specific to either `ol` or `ul`
if (isOl) {
const nextLine = lineAfterSelection(textArea.value, textArea);
const nextLineMatch = nextLine.match(LIST_LINE_HEAD_PATTERN);
itemToInsert = continueOlText(listLineMatch, nextLineMatch);
} else {
if (firstSelectedLine.match(HR_PATTERN)) return;
itemToInsert = `${indent}${leader}`;
}
itemToInsert = itemToInsert.replace(/\[[x~]\]/i, '[ ]');
e.preventDefault();
updateText({
tag: itemToInsert,
textArea,
blockTag: '',
wrap: false,
select: '',
tagContent: '',
});
}
}
export function keypressNoteText(e) {
const textArea = this;
if ($(textArea).atwho?.('isSelecting')) return;
handleContinueList(e, textArea);
handleSurroundSelectedText(e, textArea);
}
export function compositionStartNoteText() {
compositioningNoteText = true;
}
export function compositionEndNoteText() {
compositioningNoteText = false;
}
export function updateTextForToolbarBtn($toolbarBtn) {
const $textArea = $toolbarBtn.closest('.md-area').find('textarea');
Iif (!$textArea.length) return;
switch ($toolbarBtn.data('mdCommand')) {
case 'indentLines':
indentLines($textArea);
break;
case 'outdentLines':
outdentLines($textArea);
break;
default:
return updateText({
textArea: $textArea,
tag: $toolbarBtn.data('mdTag'),
cursorOffset: $toolbarBtn.data('mdCursorOffset'),
blockTag: $toolbarBtn.data('mdBlock'),
wrap: !$toolbarBtn.data('mdPrepend'),
select: $toolbarBtn.data('mdSelect'),
tagContent: $toolbarBtn.attr('data-md-tag-content'),
});
}
}
export function addMarkdownListeners(form) {
$('.markdown-area', form)
.on('keydown', keypressNoteText)
.on('compositionstart', compositionStartNoteText)
.on('compositionend', compositionEndNoteText)
.each(function attachTextareaShortcutHandlers() {
Shortcuts.initMarkdownEditorShortcuts($(this), updateTextForToolbarBtn);
});
const $allToolbarBtns = $(form)
.off('click', '.js-md')
.on('click', '.js-md', function () {
const $toolbarBtn = $(this);
return updateTextForToolbarBtn($toolbarBtn);
});
return $allToolbarBtns;
}
export function addEditorMarkdownListeners(editor) {
// eslint-disable-next-line @gitlab/no-global-event-off
$('.js-md')
.off('click')
.on('click', (e) => {
const { mdTag, mdBlock, mdPrepend, mdSelect } = $(e.currentTarget).data();
insertMarkdownText({
tag: mdTag,
blockTag: mdBlock,
wrap: !mdPrepend,
select: mdSelect,
selected: editor.getSelectedText(),
text: editor.getValue(),
editor,
});
editor.focus();
});
}
export function removeMarkdownListeners(form) {
$('.markdown-area', form)
.off('keydown', keypressNoteText)
.off('compositionstart', compositionStartNoteText)
.off('compositionend', compositionEndNoteText)
.each(function removeTextareaShortcutHandlers() {
Shortcuts.removeMarkdownEditorShortcuts($(this));
});
// eslint-disable-next-line @gitlab/no-global-event-off
return $('.js-md', form).off('click');
}
/**
* If the textarea cursor is positioned in a Markdown image declaration,
* it uses the Markdown API to resolve the image’s absolute URL.
* @param {Object} textarea Textarea DOM element
* @param {String} markdownPreviewPath Markdown API path
* @returns {Object} an object containing the image’s absolute URL, filename,
* and the markdown declaration. If the textarea cursor is not positioned
* in an image, it returns null.
*/
export const resolveSelectedImage = async (textArea, markdownPreviewPath = '') => {
const { lines, startPos } = linesFromSelection(textArea);
// image declarations can’t span more than one line in Markdown
Iif (lines > 0) {
return null;
}
const selectedLine = lines[0];
if (!/!\[.+?\]\(.+?\)/.test(selectedLine)) return null;
const lineSelectionStart = textArea.selectionStart - startPos;
const preExlm = selectedLine.substring(0, lineSelectionStart).lastIndexOf('!');
const postClose = selectedLine.substring(lineSelectionStart).indexOf(')');
if (preExlm >= 0 && postClose >= 0) {
const imageMarkdown = selectedLine.substring(preExlm, lineSelectionStart + postClose + 1);
const { data } = await axios.post(markdownPreviewPath, { text: imageMarkdown });
const parser = new DOMParser();
const dom = parser.parseFromString(data.body, 'text/html');
const imageURL = dom.body.querySelector('a').getAttribute('href');
Eif (imageURL) {
const filename = imageURL.substring(imageURL.lastIndexOf('/') + 1);
return {
imageMarkdown,
imageURL,
filename,
};
}
}
return null;
};
|