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import $ from 'jquery';
import autosize from 'autosize';
import GfmAutoComplete, { defaultAutocompleteConfig } from 'ee_else_ce/gfm_auto_complete';
import dropzoneInput from './dropzone_input';
import { addMarkdownListeners, removeMarkdownListeners } from './lib/utils/text_markdown';
import IndentHelper from './helpers/indent_helper';
import { getPlatformLeaderKeyHTML, keystroke } from "./lib/utils/common_utils";
import UndoStack from './lib/utils/undo_stack';
export default class GLForm {
constructor(form, enableGFM = {}) {
this.handleKeyShortcuts = this.handleKeyShortcuts.bind(this);
this.setState = this.setState.bind(this);
this.form = form;
this.textarea = this.form.find('textarea.js-gfm-input');
this.enableGFM = Object.assign({}, defaultAutocompleteConfig, enableGFM);
// Disable autocomplete for keywords which do not have dataSources available
const dataSources = (gl.GfmAutoComplete && gl.GfmAutoComplete.dataSources) || {};
Object.keys(this.enableGFM).forEach(item => {
if (item !== 'emojis') {
this.enableGFM[item] = Boolean(dataSources[item]);
}
});
this.undoStack = new UndoStack();
this.indentHelper = new IndentHelper(this.textarea[0]);
// This shows the indent help text in the Wiki editor, since it's still a
// HAML component
$('.js-leader-key').html(getPlatformLeaderKeyHTML());
$('.js-indent-help-message').removeClass('hidden');
// Before we start, we should clean up any previous data for this form
this.destroy();
// Set up the form
this.setupForm();
this.form.data('glForm', this);
}
destroy() {
// Clean form listeners
this.clearEventListeners();
if (this.autoComplete) {
this.autoComplete.destroy();
}
this.form.data('glForm', null);
}
setupForm() {
const isNewForm = this.form.is(':not(.gfm-form)');
this.form.removeClass('js-new-note-form');
if (isNewForm) {
this.form.find('.div-dropzone').remove();
this.form.addClass('gfm-form');
// remove notify commit author checkbox for non-commit notes
gl.utils.disableButtonIfEmptyField(
this.form.find('.js-note-text'),
this.form.find('.js-comment-button, .js-note-new-discussion'),
);
this.autoComplete = new GfmAutoComplete(gl.GfmAutoComplete && gl.GfmAutoComplete.dataSources);
this.autoComplete.setup(this.form.find('.js-gfm-input'), this.enableGFM);
dropzoneInput(this.form);
autosize(this.textarea);
}
// form and textarea event listeners
this.addEventListeners();
addMarkdownListeners(this.form);
this.form.show();
if (this.isAutosizeable) this.setupAutosize();
}
setupAutosize() {
this.textarea.off('autosize:resized').on('autosize:resized', this.setHeightData.bind(this));
this.textarea.off('mouseup.autosize').on('mouseup.autosize', this.destroyAutosize.bind(this));
setTimeout(() => {
autosize(this.textarea);
this.textarea.css('resize', 'vertical');
}, 0);
}
setHeightData() {
this.textarea.data('height', this.textarea.outerHeight());
}
destroyAutosize() {
const outerHeight = this.textarea.outerHeight();
if (this.textarea.data('height') === outerHeight) return;
autosize.destroy(this.textarea);
this.textarea.data('height', outerHeight);
this.textarea.outerHeight(outerHeight);
this.textarea.css('max-height', window.outerHeight);
}
clearEventListeners() {
this.textarea.off('focus');
this.textarea.off('blur');
this.textarea.off('keydown');
removeMarkdownListeners(this.form);
}
setState(state) {
const selection = [this.textarea[0].selectionStart, this.textarea[0].selectionEnd];
this.textarea.val(state);
this.textarea[0].setSelectionRange(selection[0], selection[1]);
}
handleUndo(event) {
/*
Custom undo/redo stack.
We need this because the toolbar buttons and indentation helpers mess with
the browser's native undo/redo capability.
*/
if (this.undoStack.isEmpty()) {
// ==== Save initial state in undo history ====
this.undoStack.save(this.textarea.val());
}
if (keystroke(event, 'Leader+Z')) {
// ==== Undo ====
event.preventDefault();
this.undoStack.save(this.textarea.val());
if (this.undoStack.canUndo()) {
this.setState(this.undoStack.undo());
}
}
else if (keystroke(event, 'Leader+Shift+Z') || keystroke(event, 'Leader+Y')) {
// ==== Redo ====
event.preventDefault();
if (this.undoStack.canRedo()) {
this.setState(this.undoStack.redo());
}
}
else if (keystroke(event, 'Space') || keystroke(event, 'Enter')) {
// ==== Save after finishing a word ====
this.undoStack.save(this.textarea.val());
}
else if (this.textarea[0].selectionStart !== this.textarea[0].selectionEnd) {
// ==== Save if killing a large selection ====
this.undoStack.save(this.textarea.val());
}
else if (this.textarea.val() === '') {
// ==== Save if deleting everything ====
this.undoStack.save('');
}
else {
// ==== Save after 1 second of inactivity ====
this.undoStack.scheduleSave(this.textarea.val());
}
}
handleIndent(event) {
if (keystroke(event, 'Leader+[')) {
// ==== Unindent selected lines ====
event.preventDefault();
this.indentHelper.unindent();
}
else if (keystroke(event, 'Leader+]')) {
// ==== Indent selected lines ====
event.preventDefault();
this.indentHelper.indent();
}
else if (keystroke(event, 'Enter')) {
// ==== Auto-indent new lines ====
event.preventDefault();
this.indentHelper.newline();
}
else if (keystroke(event, 'Backspace')) {
// ==== Auto-delete indents at the beginning of the line ====
this.indentHelper.backspace(event);
}
}
handleKeyShortcuts(event) {
this.handleIndent(event);
this.handleUndo(event);
}
addEventListeners() {
this.textarea.on('focus', function focusTextArea() {
$(this)
.closest('.md-area')
.addClass('is-focused');
});
this.textarea.on('blur', function blurTextArea() {
$(this)
.closest('.md-area')
.removeClass('is-focused');
});
this.textarea.on('keydown', e => this.handleKeyShortcuts(e.originalEvent));
}
}
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