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
|
// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import $ from 'jquery';
import React from 'react';
import * as SyntaxHighlighting from 'utils/syntax_highlighting.jsx';
import Constants from 'utils/constants.jsx';
import FileInfoPreview from './file_info_preview.jsx';
import loadingGif from 'images/load.gif';
export default class CodePreview extends React.Component {
constructor(props) {
super(props);
this.updateStateFromProps = this.updateStateFromProps.bind(this);
this.handleReceivedError = this.handleReceivedError.bind(this);
this.handleReceivedCode = this.handleReceivedCode.bind(this);
this.state = {
code: '',
lang: '',
loading: true,
success: true
};
}
componentDidMount() {
this.updateStateFromProps(this.props);
}
componentWillReceiveProps(nextProps) {
if (this.props.fileUrl !== nextProps.fileUrl) {
this.updateStateFromProps(nextProps);
}
}
updateStateFromProps(props) {
const usedLanguage = SyntaxHighlighting.getLanguageFromFileExtension(props.fileInfo.extension);
if (!usedLanguage || props.fileInfo.size > Constants.CODE_PREVIEW_MAX_FILE_SIZE) {
this.setState({code: '', lang: '', loading: false, success: false});
return;
}
this.setState({code: '', lang: usedLanguage, loading: true});
$.ajax({
async: true,
url: props.fileUrl,
type: 'GET',
dataType: 'text',
error: this.handleReceivedError,
success: this.handleReceivedCode
});
}
handleReceivedCode(data) {
let code = data;
if (data.nodeName === '#document') {
code = new XMLSerializer().serializeToString(data);
}
this.setState({
code,
loading: false,
success: true
});
}
handleReceivedError() {
this.setState({loading: false, success: false});
}
static supports(fileInfo) {
return Boolean(SyntaxHighlighting.getLanguageFromFileExtension(fileInfo.extension));
}
render() {
if (this.state.loading) {
return (
<div className='view-image__loading'>
<img
className='loader-image'
src={loadingGif}
/>
</div>
);
}
if (!this.state.success) {
return (
<FileInfoPreview
fileInfo={this.props.fileInfo}
fileUrl={this.props.fileUrl}
/>
);
}
// add line numbers when viewing a code file preview
const lines = this.state.code.match(/\r\n|\r|\n|$/g).length;
let strlines = '';
for (let i = 1; i <= lines; i++) {
if (strlines) {
strlines += '\n' + i;
} else {
strlines += i;
}
}
const language = SyntaxHighlighting.getLanguageName(this.state.lang);
const highlighted = SyntaxHighlighting.highlight(this.state.lang, this.state.code);
return (
<div className='post-code'>
<span className='post-code__language'>
{`${this.props.fileInfo.name} - ${language}`}
</span>
<code className='hljs'>
<table>
<tbody>
<tr>
<td className='post-code__lineno'>{strlines}</td>
<td dangerouslySetInnerHTML={{__html: highlighted}}/>
</tr>
</tbody>
</table>
</code>
</div>
);
}
}
CodePreview.propTypes = {
fileInfo: React.PropTypes.object.isRequired,
fileUrl: React.PropTypes.string.isRequired
};
|
