477 lines
13 KiB
JavaScript
477 lines
13 KiB
JavaScript
/* eslint-disable func-names, no-param-reassign, operator-assignment, consistent-return */
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import $ from 'jquery';
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import Shortcuts from '~/behaviors/shortcuts/shortcuts';
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import { insertText } from '~/lib/utils/common_utils';
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const LINK_TAG_PATTERN = '[{text}](url)';
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// at the start of a line, find any amount of whitespace followed by
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// a bullet point character (*+-) and an optional checkbox ([ ] [x])
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// OR a number with a . after it and an optional checkbox ([ ] [x])
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// followed by one or more whitespace characters
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const LIST_LINE_HEAD_PATTERN = /^(?<indent>\s*)(?<leader>((?<isUl>[*+-])|(?<isOl>\d+\.))( \[([x ])\])?\s)(?<content>.)?/;
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function selectedText(text, textarea) {
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return text.substring(textarea.selectionStart, textarea.selectionEnd);
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}
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function addBlockTags(blockTag, selected) {
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return `${blockTag}\n${selected}\n${blockTag}`;
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}
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function lineBefore(text, textarea, trimNewlines = true) {
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let split = text.substring(0, textarea.selectionStart);
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if (trimNewlines) {
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split = split.trim();
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}
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split = split.split('\n');
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return split[split.length - 1];
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}
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function lineAfter(text, textarea, trimNewlines = true) {
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let split = text.substring(textarea.selectionEnd);
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if (trimNewlines) {
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split = split.trim();
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} else {
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// remove possible leading newline to get at the real line
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split = split.replace(/^\n/, '');
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}
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split = split.split('\n');
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return split[0];
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}
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function convertMonacoSelectionToAceFormat(sel) {
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return {
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start: {
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row: sel.startLineNumber,
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column: sel.startColumn,
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},
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end: {
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row: sel.endLineNumber,
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column: sel.endColumn,
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},
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};
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}
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function getEditorSelectionRange(editor) {
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return convertMonacoSelectionToAceFormat(editor.getSelection());
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}
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function editorBlockTagText(text, blockTag, selected, editor) {
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const lines = text.split('\n');
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const selectionRange = getEditorSelectionRange(editor);
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const shouldRemoveBlock =
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lines[selectionRange.start.row - 1] === blockTag &&
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lines[selectionRange.end.row + 1] === blockTag;
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if (shouldRemoveBlock) {
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if (blockTag !== null) {
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const lastLine = lines[selectionRange.end.row + 1];
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const rangeWithBlockTags = new Range(
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lines[selectionRange.start.row - 1],
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0,
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selectionRange.end.row + 1,
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lastLine.length,
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);
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editor.getSelection().setSelectionRange(rangeWithBlockTags);
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}
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return selected;
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}
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return addBlockTags(blockTag, selected);
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}
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function blockTagText(text, textArea, blockTag, selected) {
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const shouldRemoveBlock =
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lineBefore(text, textArea) === blockTag && lineAfter(text, textArea) === blockTag;
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if (shouldRemoveBlock) {
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// To remove the block tag we have to select the line before & after
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if (blockTag != null) {
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textArea.selectionStart = textArea.selectionStart - (blockTag.length + 1);
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textArea.selectionEnd = textArea.selectionEnd + (blockTag.length + 1);
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}
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return selected;
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}
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return addBlockTags(blockTag, selected);
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}
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function moveCursor({
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textArea,
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tag,
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cursorOffset,
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positionBetweenTags,
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removedLastNewLine,
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select,
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editor,
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editorSelectionStart,
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editorSelectionEnd,
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}) {
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let pos;
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if (textArea && !textArea.setSelectionRange) {
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return;
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}
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if (select && select.length > 0) {
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if (textArea) {
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// calculate the part of the text to be selected
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const startPosition = textArea.selectionStart - (tag.length - tag.indexOf(select));
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const endPosition = startPosition + select.length;
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return textArea.setSelectionRange(startPosition, endPosition);
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} else if (editor) {
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editor.selectWithinSelection(select, tag);
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return;
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}
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}
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if (textArea) {
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if (textArea.selectionStart === textArea.selectionEnd) {
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if (positionBetweenTags) {
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pos = textArea.selectionStart - tag.length;
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} else {
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pos = textArea.selectionStart;
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}
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if (removedLastNewLine) {
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pos -= 1;
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}
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if (cursorOffset) {
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pos -= cursorOffset;
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}
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return textArea.setSelectionRange(pos, pos);
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}
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} else if (editor && editorSelectionStart.row === editorSelectionEnd.row) {
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if (positionBetweenTags) {
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editor.moveCursor(tag.length * -1);
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}
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}
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}
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export function insertMarkdownText({
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textArea,
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text,
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tag,
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cursorOffset,
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blockTag,
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selected = '',
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wrap,
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select,
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editor,
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}) {
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let removedLastNewLine = false;
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let removedFirstNewLine = false;
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let currentLineEmpty = false;
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let editorSelectionStart;
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let editorSelectionEnd;
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let lastNewLine;
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let textToInsert;
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selected = selected.toString();
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if (editor) {
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const selectionRange = getEditorSelectionRange(editor);
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editorSelectionStart = selectionRange.start;
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editorSelectionEnd = selectionRange.end;
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}
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// check for link pattern and selected text is an URL
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// if so fill in the url part instead of the text part of the pattern.
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if (tag === LINK_TAG_PATTERN) {
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if (URL) {
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try {
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new URL(selected); // eslint-disable-line no-new
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// valid url
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tag = '[text]({text})';
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select = 'text';
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} catch (e) {
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// ignore - no valid url
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}
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}
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}
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// Remove the first newline
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if (selected.indexOf('\n') === 0) {
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removedFirstNewLine = true;
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selected = selected.replace(/\n+/, '');
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}
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// Remove the last newline
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if (textArea) {
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if (textArea.selectionEnd - textArea.selectionStart > selected.replace(/\n$/, '').length) {
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removedLastNewLine = true;
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selected = selected.replace(/\n$/, '');
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}
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} else if (editor) {
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if (editorSelectionStart.row !== editorSelectionEnd.row) {
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removedLastNewLine = true;
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selected = selected.replace(/\n$/, '');
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}
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}
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const selectedSplit = selected.split('\n');
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if (editor && !wrap) {
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lastNewLine = editor.getValue().split('\n')[editorSelectionStart.row];
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if (/^\s*$/.test(lastNewLine)) {
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currentLineEmpty = true;
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}
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} else if (textArea && !wrap) {
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lastNewLine = textArea.value.substr(0, textArea.selectionStart).lastIndexOf('\n');
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// Check whether the current line is empty or consists only of spaces(=handle as empty)
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if (/^\s*$/.test(textArea.value.substring(lastNewLine, textArea.selectionStart))) {
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currentLineEmpty = true;
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}
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}
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const isBeginning =
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(textArea && textArea.selectionStart === 0) ||
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(editor && editorSelectionStart.column === 0 && editorSelectionStart.row === 0);
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const startChar = !wrap && !currentLineEmpty && !isBeginning ? '\n' : '';
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const textPlaceholder = '{text}';
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if (selectedSplit.length > 1 && (!wrap || (blockTag != null && blockTag !== ''))) {
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if (blockTag != null && blockTag !== '') {
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textToInsert = editor
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? editorBlockTagText(text, blockTag, selected, editor)
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: blockTagText(text, textArea, blockTag, selected);
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} else {
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textToInsert = selectedSplit
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.map((val) => {
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if (tag.indexOf(textPlaceholder) > -1) {
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return tag.replace(textPlaceholder, val);
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}
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if (val.indexOf(tag) === 0) {
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return String(val.replace(tag, ''));
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}
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return String(tag) + val;
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})
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.join('\n');
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}
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} else if (tag.indexOf(textPlaceholder) > -1) {
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textToInsert = tag.replace(textPlaceholder, () =>
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selected.replace(/\\n/g, '\n').replace(/%br/g, '\\n'),
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);
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} else {
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textToInsert = String(startChar) + tag + selected + (wrap ? tag : '');
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}
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if (removedFirstNewLine) {
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textToInsert = `\n${textToInsert}`;
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}
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if (removedLastNewLine) {
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textToInsert += '\n';
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}
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if (editor) {
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editor.replaceSelectedText(textToInsert, select);
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} else {
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insertText(textArea, textToInsert);
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}
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return moveCursor({
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textArea,
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tag: tag.replace(textPlaceholder, selected),
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cursorOffset,
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positionBetweenTags: wrap && selected.length === 0,
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removedLastNewLine,
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select,
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editor,
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editorSelectionStart,
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editorSelectionEnd,
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});
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}
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function updateText({ textArea, tag, cursorOffset, blockTag, wrap, select, tagContent }) {
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const $textArea = $(textArea);
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textArea = $textArea.get(0);
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const text = $textArea.val();
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const selected = selectedText(text, textArea) || tagContent;
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$textArea.focus();
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return insertMarkdownText({
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textArea,
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text,
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tag,
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cursorOffset,
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blockTag,
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selected,
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wrap,
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select,
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});
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}
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/* eslint-disable @gitlab/require-i18n-strings */
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function handleSurroundSelectedText(e, textArea) {
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if (!gon.markdown_surround_selection) return;
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if (textArea.selectionStart === textArea.selectionEnd) return;
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const keys = {
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'*': '**{text}**', // wraps with bold character
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_: '_{text}_', // wraps with italic character
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'`': '`{text}`', // wraps with inline character
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"'": "'{text}'", // single quotes
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'"': '"{text}"', // double quotes
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'[': '[{text}]', // brackets
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'{': '{{text}}', // braces
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'(': '({text})', // parentheses
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'<': '<{text}>', // angle brackets
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};
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const tag = keys[e.key];
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if (tag) {
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e.preventDefault();
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updateText({
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tag,
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textArea,
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blockTag: '',
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wrap: true,
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select: '',
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tagContent: '',
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});
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}
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}
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/* eslint-enable @gitlab/require-i18n-strings */
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/**
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* Returns the content for a new line following a list item.
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*
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* @param {Object} result - regex match of the current line
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* @param {Object?} nextLineResult - regex match of the next line
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* @returns string with the new list item
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*/
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function continueOlText(result, nextLineResult) {
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const { indent, leader } = result.groups;
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const { indent: nextIndent, isOl: nextIsOl } = nextLineResult?.groups ?? {};
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const [numStr, postfix = ''] = leader.split('.');
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const incrementBy = nextIsOl && nextIndent === indent ? 0 : 1;
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const num = parseInt(numStr, 10) + incrementBy;
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return `${indent}${num}.${postfix}`;
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}
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function handleContinueList(e, textArea) {
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if (!gon.features?.markdownContinueLists) return;
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if (!(e.key === 'Enter')) return;
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if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) return;
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if (textArea.selectionStart !== textArea.selectionEnd) return;
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const currentLine = lineBefore(textArea.value, textArea, false);
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const result = currentLine.match(LIST_LINE_HEAD_PATTERN);
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if (result) {
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const { leader, indent, content, isOl } = result.groups;
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const prevLineEmpty = !content;
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if (prevLineEmpty) {
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// erase previous empty list item - select the text and allow the
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// natural line feed erase the text
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textArea.selectionStart = textArea.selectionStart - result[0].length;
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return;
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}
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let itemToInsert;
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if (isOl) {
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const nextLine = lineAfter(textArea.value, textArea, false);
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const nextLineResult = nextLine.match(LIST_LINE_HEAD_PATTERN);
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itemToInsert = continueOlText(result, nextLineResult);
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} else {
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// isUl
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itemToInsert = `${indent}${leader}`;
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}
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e.preventDefault();
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updateText({
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tag: itemToInsert,
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textArea,
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blockTag: '',
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wrap: false,
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select: '',
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tagContent: '',
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});
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}
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}
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export function keypressNoteText(e) {
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const textArea = this;
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if ($(textArea).atwho?.('isSelecting')) return;
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handleContinueList(e, textArea);
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handleSurroundSelectedText(e, textArea);
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}
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export function updateTextForToolbarBtn($toolbarBtn) {
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return updateText({
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textArea: $toolbarBtn.closest('.md-area').find('textarea'),
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tag: $toolbarBtn.data('mdTag'),
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cursorOffset: $toolbarBtn.data('mdCursorOffset'),
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blockTag: $toolbarBtn.data('mdBlock'),
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wrap: !$toolbarBtn.data('mdPrepend'),
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select: $toolbarBtn.data('mdSelect'),
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tagContent: $toolbarBtn.attr('data-md-tag-content'),
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});
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}
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export function addMarkdownListeners(form) {
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$('.markdown-area', form)
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.on('keydown', keypressNoteText)
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.each(function attachTextareaShortcutHandlers() {
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Shortcuts.initMarkdownEditorShortcuts($(this), updateTextForToolbarBtn);
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});
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// eslint-disable-next-line @gitlab/no-global-event-off
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const $allToolbarBtns = $('.js-md', form)
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.off('click')
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.on('click', function () {
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const $toolbarBtn = $(this);
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return updateTextForToolbarBtn($toolbarBtn);
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});
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return $allToolbarBtns;
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}
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export function addEditorMarkdownListeners(editor) {
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// eslint-disable-next-line @gitlab/no-global-event-off
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$('.js-md')
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.off('click')
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.on('click', (e) => {
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const { mdTag, mdBlock, mdPrepend, mdSelect } = $(e.currentTarget).data();
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insertMarkdownText({
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tag: mdTag,
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blockTag: mdBlock,
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wrap: !mdPrepend,
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select: mdSelect,
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selected: editor.getSelectedText(),
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text: editor.getValue(),
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editor,
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});
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editor.focus();
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});
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}
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export function removeMarkdownListeners(form) {
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$('.markdown-area', form)
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.off('keydown', keypressNoteText)
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.each(function removeTextareaShortcutHandlers() {
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Shortcuts.removeMarkdownEditorShortcuts($(this));
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});
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// eslint-disable-next-line @gitlab/no-global-event-off
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return $('.js-md', form).off('click');
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}
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