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discourse-custom-wizard/assets/javascripts/wizard/components/wizard-editor.js.es6
2019-10-11 08:49:20 +11:00

659 Zeilen
19 KiB
JavaScript

/* eslint no-undef: 0 */
/*global Mousetrap:true */
import { default as computed, on, observes } from 'ember-addons/ember-computed-decorators';
import { cookAsync } from '../lib/text-lite';
import { getRegister } from 'discourse-common/lib/get-owner';
import { siteDir } from 'discourse/lib/text-direction';
import { determinePostReplaceSelection, clipboardData } from '../lib/utilities-lite';
import toMarkdown from 'discourse/lib/to-markdown';
// Our head can be a static string or a function that returns a string
// based on input (like for numbered lists).
function getHead(head, prev) {
if (typeof head === "string") {
return [head, head.length];
} else {
return getHead(head(prev));
}
}
function getButtonLabel(labelKey, defaultLabel) {
// use the Font Awesome icon if the label matches the default
return I18n.t(labelKey) === defaultLabel ? null : labelKey;
}
const OP = {
NONE: 0,
REMOVED: 1,
ADDED: 2
};
const FOUR_SPACES_INDENT = '4-spaces-indent';
const _createCallbacks = [];
const isInside = (text, regex) => {
const matches = text.match(regex);
return matches && (matches.length % 2);
};
class Toolbar {
constructor() {
this.shortcuts = {};
this.groups = [
{group: 'fontStyles', buttons: []},
{group: 'insertions', buttons: []},
{group: 'extras', buttons: []}
];
this.addButton({
trimLeading: true,
id: 'bold',
group: 'fontStyles',
icon: 'bold',
label: getButtonLabel('wizard_composer.bold_label', 'B'),
shortcut: 'B',
perform: e => e.applySurround('**', '**', 'bold_text')
});
this.addButton({
trimLeading: true,
id: 'italic',
group: 'fontStyles',
icon: 'italic',
label: getButtonLabel('wizard_composer.italic_label', 'I'),
shortcut: 'I',
perform: e => e.applySurround('_', '_', 'italic_text')
});
this.addButton({
id: 'quote',
group: 'insertions',
icon: 'quote-right',
shortcut: 'Shift+9',
perform: e => e.applyList(
'> ',
'blockquote_text',
{ applyEmptyLines: true, multiline: true }
)
});
this.addButton({id: 'code', group: 'insertions', shortcut: 'Shift+C', action: 'formatCode'});
this.addButton({
id: 'bullet',
group: 'extras',
icon: 'list-ul',
shortcut: 'Shift+8',
title: 'wizard_composer.ulist_title',
perform: e => e.applyList('* ', 'list_item')
});
this.addButton({
id: 'list',
group: 'extras',
icon: 'list-ol',
shortcut: 'Shift+7',
title: 'wizard_composer.olist_title',
perform: e => e.applyList(i => !i ? "1. " : `${parseInt(i) + 1}. `, 'list_item')
});
if (Wizard.SiteSettings.support_mixed_text_direction) {
this.addButton({
id: 'toggle-direction',
group: 'extras',
icon: 'exchange',
shortcut: 'Shift+6',
title: 'wizard_composer.toggle_direction',
perform: e => e.toggleDirection(),
});
}
this.groups[this.groups.length-1].lastGroup = true;
}
addButton(button) {
const g = this.groups.findBy('group', button.group);
if (!g) {
throw `Couldn't find toolbar group ${button.group}`;
}
const createdButton = {
id: button.id,
className: button.className || button.id,
label: button.label,
icon: button.label ? null : button.icon || button.id,
action: button.action || 'toolbarButton',
perform: button.perform || function() { },
trimLeading: button.trimLeading,
popupMenu: button.popupMenu || false
};
if (button.sendAction) {
createdButton.sendAction = button.sendAction;
}
const title = I18n.t(button.title || `wizard_composer.${button.id}_title`);
if (button.shortcut) {
const mac = /Mac|iPod|iPhone|iPad/.test(navigator.platform);
const mod = mac ? 'Meta' : 'Ctrl';
var shortcutTitle = `${mod}+${button.shortcut}`;
// Mac users are used to glyphs for shortcut keys
if (mac) {
shortcutTitle = shortcutTitle
.replace('Shift', "\u21E7")
.replace('Meta', "\u2318")
.replace('Alt', "\u2325")
.replace(/\+/g, '');
} else {
shortcutTitle = shortcutTitle
.replace('Shift', I18n.t('shortcut_modifier_key.shift'))
.replace('Ctrl', I18n.t('shortcut_modifier_key.ctrl'))
.replace('Alt', I18n.t('shortcut_modifier_key.alt'));
}
createdButton.title = `${title} (${shortcutTitle})`;
this.shortcuts[`${mod}+${button.shortcut}`.toLowerCase()] = createdButton;
} else {
createdButton.title = title;
}
if (button.unshift) {
g.buttons.unshift(createdButton);
} else {
g.buttons.push(createdButton);
}
}
}
export default Ember.Component.extend({
classNames: ['d-editor'],
ready: false,
lastSel: null,
_mouseTrap: null,
showPreview: false,
_readyNow() {
this.set('ready', true);
if (this.get('autofocus')) {
this.$('textarea').focus();
}
},
init() {
this._super();
this.register = getRegister(this);
},
didInsertElement() {
this._super();
Ember.run.scheduleOnce('afterRender', this, this._readyNow);
const mouseTrap = Mousetrap(this.$('.d-editor-input')[0]);
const shortcuts = this.get('toolbar.shortcuts');
// for some reason I am having trouble bubbling this so hack it in
mouseTrap.bind(['ctrl+alt+f'], (event) =>{
this.appEvents.trigger('header:keyboard-trigger', {type: 'search', event});
return true;
});
Object.keys(shortcuts).forEach(sc => {
const button = shortcuts[sc];
mouseTrap.bind(sc, () => {
this.send(button.action, button);
return false;
});
});
// disable clicking on links in the preview
this.$('.d-editor-preview').on('click.preview', e => {
if ($(e.target).is("a")) {
e.preventDefault();
return false;
}
});
if (this.get('composerEvents')) {
this.appEvents.on('composer:insert-block', text => this._addBlock(this._getSelected(), text));
this.appEvents.on('composer:insert-text', (text, options) => this._addText(this._getSelected(), text, options));
this.appEvents.on('composer:replace-text', (oldVal, newVal) => this._replaceText(oldVal, newVal));
}
this._mouseTrap = mouseTrap;
},
@on('willDestroyElement')
_shutDown() {
if (this.get('composerEvents')) {
this.appEvents.off('composer:insert-block');
this.appEvents.off('composer:insert-text');
this.appEvents.off('composer:replace-text');
}
const mouseTrap = this._mouseTrap;
Object.keys(this.get('toolbar.shortcuts')).forEach(sc => mouseTrap.unbind(sc));
mouseTrap.unbind('ctrl+/','command+/');
this.$('.d-editor-preview').off('click.preview');
},
@computed
toolbar() {
const toolbar = new Toolbar(this.site);
_createCallbacks.forEach(cb => cb(toolbar));
this.sendAction('extraButtons', toolbar);
return toolbar;
},
_updatePreview() {
if (this._state !== "inDOM") { return; }
const value = this.get('value');
const markdownOptions = this.get('markdownOptions') || {};
cookAsync(value, markdownOptions).then(cooked => {
if (this.get('isDestroyed')) { return; }
this.set('preview', cooked);
Ember.run.scheduleOnce('afterRender', () => {
if (this._state !== "inDOM") { return; }
const $preview = this.$('.d-editor-preview');
if ($preview.length === 0) return;
this.sendAction('previewUpdated', $preview);
});
});
},
@observes('ready', 'value')
_watchForChanges() {
if (!this.get('ready')) { return; }
// Debouncing in test mode is complicated
if (Ember.testing) {
this._updatePreview();
} else {
Ember.run.debounce(this, this._updatePreview, 30);
}
},
_getSelected(trimLeading, opts) {
if (!this.get('ready')) { return; }
const textarea = this.$('textarea.d-editor-input')[0];
const value = textarea.value;
let start = textarea.selectionStart;
let end = textarea.selectionEnd;
// trim trailing spaces cause **test ** would be invalid
while (end > start && /\s/.test(value.charAt(end-1))) {
end--;
}
if (trimLeading) {
// trim leading spaces cause ** test** would be invalid
while(end > start && /\s/.test(value.charAt(start))) {
start++;
}
}
const selVal = value.substring(start, end);
const pre = value.slice(0, start);
const post = value.slice(end);
if (opts && opts.lineVal) {
const lineVal = value.split("\n")[value.substr(0, textarea.selectionStart).split("\n").length - 1];
return { start, end, value: selVal, pre, post, lineVal };
} else {
return { start, end, value: selVal, pre, post };
}
},
_selectText(from, length) {
Ember.run.scheduleOnce('afterRender', () => {
const $textarea = this.$('textarea.d-editor-input');
const textarea = $textarea[0];
const oldScrollPos = $textarea.scrollTop();
if (!!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)) {
$textarea.focus();
}
textarea.selectionStart = from;
textarea.selectionEnd = textarea.selectionStart + length;
$textarea.scrollTop(oldScrollPos);
});
},
// perform the same operation over many lines of text
_getMultilineContents(lines, head, hval, hlen, tail, tlen, opts) {
let operation = OP.NONE;
const applyEmptyLines = opts && opts.applyEmptyLines;
return lines.map(l => {
if (!applyEmptyLines && l.length === 0) {
return l;
}
if (operation !== OP.ADDED &&
(l.slice(0, hlen) === hval && tlen === 0 ||
(tail.length && l.slice(-tlen) === tail))) {
operation = OP.REMOVED;
if (tlen === 0) {
const result = l.slice(hlen);
[hval, hlen] = getHead(head, hval);
return result;
} else if (l.slice(-tlen) === tail) {
const result = l.slice(hlen, -tlen);
[hval, hlen] = getHead(head, hval);
return result;
}
} else if (operation === OP.NONE) {
operation = OP.ADDED;
} else if (operation === OP.REMOVED) {
return l;
}
const result = `${hval}${l}${tail}`;
[hval, hlen] = getHead(head, hval);
return result;
}).join("\n");
},
_applySurround(sel, head, tail, exampleKey, opts) {
const pre = sel.pre;
const post = sel.post;
const tlen = tail.length;
if (sel.start === sel.end) {
if (tlen === 0) { return; }
const [hval, hlen] = getHead(head);
const example = I18n.t(`wizard_composer.${exampleKey}`);
this.set('value', `${pre}${hval}${example}${tail}${post}`);
this._selectText(pre.length + hlen, example.length);
} else if (opts && !opts.multiline) {
const [hval, hlen] = getHead(head);
if (pre.slice(-hlen) === hval && post.slice(0, tail.length) === tail) {
this.set('value', `${pre.slice(0, -hlen)}${sel.value}${post.slice(tail.length)}`);
this._selectText(sel.start - hlen, sel.value.length);
} else {
this.set('value', `${pre}${hval}${sel.value}${tail}${post}`);
this._selectText(sel.start + hlen, sel.value.length);
}
} else {
const lines = sel.value.split("\n");
let [hval, hlen] = getHead(head);
if (lines.length === 1 && pre.slice(-tlen) === tail && post.slice(0, hlen) === hval) {
this.set('value', `${pre.slice(0, -hlen)}${sel.value}${post.slice(tlen)}`);
this._selectText(sel.start - hlen, sel.value.length);
} else {
const contents = this._getMultilineContents(
lines,
head,
hval,
hlen,
tail,
tlen,
opts
);
this.set('value', `${pre}${contents}${post}`);
if (lines.length === 1 && tlen > 0) {
this._selectText(sel.start + hlen, sel.value.length);
} else {
this._selectText(sel.start, contents.length);
}
}
}
},
_applyList(sel, head, exampleKey, opts) {
if (sel.value.indexOf("\n") !== -1) {
this._applySurround(sel, head, '', exampleKey, opts);
} else {
const [hval, hlen] = getHead(head);
if (sel.start === sel.end) {
sel.value = I18n.t(`wizard_composer.${exampleKey}`);
}
const trimmedPre = sel.pre.trim();
const number = (sel.value.indexOf(hval) === 0) ? sel.value.slice(hlen) : `${hval}${sel.value}`;
const preLines = trimmedPre.length ? `${trimmedPre}\n\n` : "";
const trimmedPost = sel.post.trim();
const post = trimmedPost.length ? `\n\n${trimmedPost}` : trimmedPost;
this.set('value', `${preLines}${number}${post}`);
this._selectText(preLines.length, number.length);
}
},
_replaceText(oldVal, newVal) {
const val = this.get('value');
const needleStart = val.indexOf(oldVal);
if (needleStart === -1) {
// Nothing to replace.
return;
}
const textarea = this.$('textarea.d-editor-input')[0];
// Determine post-replace selection.
const newSelection = determinePostReplaceSelection({
selection: { start: textarea.selectionStart, end: textarea.selectionEnd },
needle: { start: needleStart, end: needleStart + oldVal.length },
replacement: { start: needleStart, end: needleStart + newVal.length }
});
// Replace value (side effect: cursor at the end).
this.set('value', val.replace(oldVal, newVal));
// Restore cursor.
this._selectText(newSelection.start, newSelection.end - newSelection.start);
},
_addBlock(sel, text) {
text = (text || '').trim();
if (text.length === 0) {
return;
}
let pre = sel.pre;
let post = sel.value + sel.post;
if (pre.length > 0) {
pre = pre.replace(/\n*$/, "\n\n");
}
if (post.length > 0) {
post = post.replace(/^\n*/, "\n\n");
} else {
post = "\n";
}
const value = pre + text + post;
const $textarea = this.$('textarea.d-editor-input');
this.set('value', value);
$textarea.val(value);
$textarea.prop("selectionStart", (pre+text).length + 2);
$textarea.prop("selectionEnd", (pre+text).length + 2);
Ember.run.scheduleOnce("afterRender", () => $textarea.focus());
},
_addText(sel, text, options) {
const $textarea = this.$('textarea.d-editor-input');
if (options && options.ensureSpace) {
if ((sel.pre + '').length > 0) {
if (!sel.pre.match(/\s$/)) {
text = ' ' + text;
}
}
if ((sel.post + '').length > 0) {
if (!sel.post.match(/^\s/)) {
text = text + ' ';
}
}
}
const insert = `${sel.pre}${text}`;
const value = `${insert}${sel.post}`;
this.set('value', value);
$textarea.val(value);
$textarea.prop("selectionStart", insert.length);
$textarea.prop("selectionEnd", insert.length);
Ember.run.scheduleOnce("afterRender", () => $textarea.focus());
},
_extractTable(text) {
if (text.endsWith("\n")) {
text = text.substring(0, text.length - 1);
}
let rows = text.split("\n");
if (rows.length > 1) {
const columns = rows.map(r => r.split("\t").length);
const isTable = columns.reduce((a, b) => a && columns[0] === b && b > 1) &&
!(columns[0] === 2 && rows[0].split("\t")[0].match(/^•$|^\d+.$/)); // to skip tab delimited lists
if (isTable) {
const splitterRow = [...Array(columns[0])].map(() => "---").join("\t");
rows.splice(1, 0, splitterRow);
return "|" + rows.map(r => r.split("\t").join("|")).join("|\n|") + "|\n";
}
}
return null;
},
_toggleDirection() {
const $textArea = $(".d-editor-input");
let currentDir = $textArea.attr('dir') ? $textArea.attr('dir') : siteDir(),
newDir = currentDir === 'ltr' ? 'rtl' : 'ltr';
$textArea.attr('dir', newDir).focus();
},
paste(e) {
if (!$(".d-editor-input").is(":focus")) {
return;
}
const isComposer = $("#reply-control .d-editor-input").is(":focus");
let { clipboard, canPasteHtml } = clipboardData(e, isComposer);
let plainText = clipboard.getData("text/plain");
let html = clipboard.getData("text/html");
let handled = false;
if (plainText) {
plainText = plainText.trim().replace(/\r/g,"");
const table = this._extractTable(plainText);
if (table) {
this.appEvents.trigger('composer:insert-text', table);
handled = true;
}
}
const { pre, lineVal } = this._getSelected(null, {lineVal: true});
const isInlinePasting = pre.match(/[^\n]$/);
if (canPasteHtml && plainText) {
if (isInlinePasting) {
canPasteHtml = !(lineVal.match(/^```/) || isInside(pre, /`/g) || lineVal.match(/^ /));
} else {
canPasteHtml = !isInside(pre, /(^|\n)```/g);
}
}
if (canPasteHtml && !handled) {
let markdown = toMarkdown(html);
if (!plainText || plainText.length < markdown.length) {
if(isInlinePasting) {
markdown = markdown.replace(/^#+/, "").trim();
markdown = pre.match(/\S$/) ? ` ${markdown}` : markdown;
}
this.appEvents.trigger('composer:insert-text', markdown);
handled = true;
}
}
if (handled) {
e.preventDefault();
}
},
keyPress(e) {
if (e.keyCode === 13) {
const selected = this._getSelected();
this._addText(selected, '\n');
return false;
}
},
actions: {
toolbarButton(button) {
const selected = this._getSelected(button.trimLeading);
const toolbarEvent = {
selected,
selectText: (from, length) => this._selectText(from, length),
applySurround: (head, tail, exampleKey, opts) => this._applySurround(selected, head, tail, exampleKey, opts),
applyList: (head, exampleKey, opts) => this._applyList(selected, head, exampleKey, opts),
addText: text => this._addText(selected, text),
replaceText: text => this._addText({pre: '', post: ''}, text),
getText: () => this.get('value'),
toggleDirection: () => this._toggleDirection(),
};
if (button.sendAction) {
return this.sendAction(button.sendAction, toolbarEvent);
} else {
button.perform(toolbarEvent);
}
},
formatCode() {
const sel = this._getSelected('', { lineVal: true });
const selValue = sel.value;
const hasNewLine = selValue.indexOf("\n") !== -1;
const isBlankLine = sel.lineVal.trim().length === 0;
const isFourSpacesIndent = this.siteSettings.code_formatting_style === FOUR_SPACES_INDENT;
if (!hasNewLine) {
if (selValue.length === 0 && isBlankLine) {
if (isFourSpacesIndent) {
const example = I18n.t(`wizard_composer.code_text`);
this.set('value', `${sel.pre} ${example}${sel.post}`);
return this._selectText(sel.pre.length + 4, example.length);
} else {
return this._applySurround(sel, "```\n", "\n```", 'paste_code_text');
}
} else {
return this._applySurround(sel, '`', '`', 'code_title');
}
} else {
if (isFourSpacesIndent) {
return this._applySurround(sel, ' ', '', 'code_text');
} else {
const preNewline = (sel.pre[-1] !== "\n" && sel.pre !== "") ? "\n" : "";
const postNewline = sel.post[0] !== "\n" ? "\n" : "";
return this._addText(sel, `${preNewline}\`\`\`\n${sel.value}\n\`\`\`${postNewline}`);
}
}
}
}
});