1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
import $ from 'jquery';
import { sanitize } from '~/lib/dompurify';
import { getSelectedFragment, insertText } from '~/lib/utils/common_utils';
export class CopyAsGFM {
constructor() {
// iOS currently does not support clipboardData.setData(). This bug should
// be fixed in iOS 12, but for now we'll disable this for all iOS browsers
// ref: https://trac.webkit.org/changeset/222228/webkit
const userAgent = (typeof navigator !== 'undefined' && navigator.userAgent) || '';
const isIOS = /\b(iPad|iPhone|iPod)(?=;)/.test(userAgent);
if (isIOS) return;
$(document).on('copy', '.md', (e) => {
CopyAsGFM.copyAsGFM(e, CopyAsGFM.transformGFMSelection);
});
$(document).on('copy', 'pre.code.highlight, table.code td.line_content', (e) => {
CopyAsGFM.copyAsGFM(e, CopyAsGFM.transformCodeSelection);
});
$(document).on('paste', '.js-gfm-input', CopyAsGFM.pasteGFM);
}
static copyAsGFM(e, transformer) {
const { clipboardData } = e.originalEvent;
if (!clipboardData) return;
const documentFragment = getSelectedFragment();
if (!documentFragment) return;
const el = transformer(documentFragment.cloneNode(true), e.currentTarget);
if (!el) return;
e.preventDefault();
e.stopPropagation();
const div = document.createElement('div');
div.appendChild(el.cloneNode(true));
const html = div.innerHTML;
clipboardData.setData('text/plain', el.textContent);
clipboardData.setData('text/html', html);
// We are also setting this as fallback to transform the selection to gfm on paste
clipboardData.setData('text/x-gfm-html', html);
CopyAsGFM.nodeToGFM(el)
.then((res) => {
clipboardData.setData('text/x-gfm', res);
})
.catch(() => {
// Not showing the error as Firefox might doesn't allow
// it or other browsers who have a time limit on the execution
// of the copy event
});
}
static pasteGFM(e) {
const { clipboardData } = e.originalEvent;
if (!clipboardData) return;
const text = clipboardData.getData('text/plain');
const gfm = clipboardData.getData('text/x-gfm');
const gfmHtml = clipboardData.getData('text/x-gfm-html');
if (!gfm && !gfmHtml) return;
e.preventDefault();
// We have the original selection already converted to gfm
if (gfm) {
CopyAsGFM.insertPastedText(e.target, text, gfm);
} else {
// Due to the async copy call we are not able to produce gfm so we transform the cached HTML
const div = document.createElement('div');
div.innerHTML = sanitize(gfmHtml);
CopyAsGFM.nodeToGFM(div)
.then((transformedGfm) => {
CopyAsGFM.insertPastedText(e.target, text, transformedGfm);
})
.catch(() => {});
}
}
static insertPastedText(target, text, gfm) {
insertText(target, (textBefore) => {
// If the text before the cursor contains an odd number of backticks,
// we are either inside an inline code span that starts with 1 backtick
// or a code block that starts with 3 backticks.
// This logic still holds when there are one or more _closed_ code spans
// or blocks that will have 2 or 6 backticks.
// This will break down when the actual code block contains an uneven
// number of backticks, but this is a rare edge case.
const backtickMatch = textBefore.match(/`/g);
const insideCodeBlock = backtickMatch && backtickMatch.length % 2 === 1;
if (insideCodeBlock) {
return text;
}
return gfm;
});
}
static transformGFMSelection(documentFragment) {
const gfmElements = documentFragment.querySelectorAll('.md');
switch (gfmElements.length) {
case 0: {
return documentFragment;
}
case 1: {
return gfmElements[0];
}
default: {
const allGfmElement = document.createElement('div');
for (let i = 0; i < gfmElements.length; i += 1) {
const gfmElement = gfmElements[i];
allGfmElement.appendChild(gfmElement);
allGfmElement.appendChild(document.createTextNode('\n\n'));
}
return allGfmElement;
}
}
}
static transformCodeSelection(documentFragment, target) {
let lineSelector = '.line';
if (target) {
const lineClass = ['left-side', 'right-side'].filter((name) =>
target.classList.contains(name),
)[0];
if (lineClass) {
lineSelector = `.line_content.${lineClass} ${lineSelector}`;
}
}
const lineElements = documentFragment.querySelectorAll(lineSelector);
let codeElement;
if (lineElements.length > 1) {
codeElement = document.createElement('pre');
codeElement.className = 'code highlight';
const lang = lineElements[0].getAttribute('lang');
if (lang) {
codeElement.setAttribute('lang', lang);
}
} else {
codeElement = document.createElement('code');
}
if (lineElements.length > 0) {
for (let i = 0; i < lineElements.length; i += 1) {
const lineElement = lineElements[i];
const line = document.createElement('span');
line.append(...lineElement.childNodes);
codeElement.appendChild(line);
codeElement.appendChild(document.createTextNode('\n'));
}
} else {
codeElement.appendChild(documentFragment);
}
return codeElement;
}
static nodeToGFM(node) {
return Promise.all([
import(/* webpackChunkName: 'gfm_copy_extra' */ '@tiptap/pm/model'),
import(/* webpackChunkName: 'gfm_copy_extra' */ './schema'),
import(/* webpackChunkName: 'gfm_copy_extra' */ './serializer'),
])
.then(([prosemirrorModel, schema, markdownSerializer]) => {
const { DOMParser } = prosemirrorModel;
const wrapEl = document.createElement('div');
wrapEl.appendChild(node.cloneNode(true));
const doc = DOMParser.fromSchema(schema.default).parse(wrapEl);
const res = markdownSerializer.default.serialize(doc, {
tightLists: true,
});
return res;
})
.catch(() => {});
}
static quoted(markdown) {
return `> ${markdown.split('\n').join('\n> ')}`;
}
}
// Export CopyAsGFM as a global for rspec to access
// see /spec/features/markdown/copy_as_gfm_spec.rb
if (process.env.NODE_ENV !== 'production') {
window.CopyAsGFM = CopyAsGFM;
}
export default function initCopyAsGFM() {
return new CopyAsGFM();
}
|