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
|
/**
* (c) 2010 StatusNet, Inc.
*/
(function() {
var oEmbed = {
api: 'http://oohembed.com/oohembed',
width: 100,
height: 75,
cache: {},
callbacks: {},
/**
* Do a cached oEmbed lookup for the given URL.
*
* @param {String} url
* @param {function} callback
*/
lookup: function(url, callback)
{
if (typeof oEmbed.cache[url] == "object") {
// We already have a successful lookup.
callback(oEmbed.cache[url]);
} else if (typeof oEmbed.callbacks[url] == "undefined") {
// No lookup yet... Start it!
oEmbed.callbacks[url] = [callback];
oEmbed.rawLookup(url, function(data) {
oEmbed.cache[url] = data;
var callbacks = oEmbed.callbacks[url];
oEmbed.callbacks[url] = undefined;
for (var i = 0; i < callbacks.length; i++) {
callbacks[i](data);
}
});
} else {
// A lookup is in progress.
oEmbed.callbacks[url].push(callback);
}
},
/**
* Do an oEmbed lookup for the given URL.
*
* @fixme proxy through ourselves if possible?
* @fixme use the global thumbnail size settings
*
* @param {String} url
* @param {function} callback
*/
rawLookup: function(url, callback)
{
var params = {
url: url,
format: 'json',
maxwidth: oEmbed.width,
maxheight: oEmbed.height,
token: $('#token').val()
};
$.get(oEmbed.api, params, function(data, xhr) {
callback(data);
}, 'json');
}
};
var LinkPreview = {
links: [],
/**
* Find URL links from the source text that may be interesting.
*
* @param {String} text
* @return {Array} list of URLs
*/
findLinks: function (text)
{
// @fixme match this to core code
var re = /(?:^| )(https?:\/\/.+?\/.+?)(?= |$)/mg;
var links = [];
var matches;
while ((matches = re.exec(text)) !== null) {
links.push(matches[1]);
}
return links;
},
/**
* Start looking up info for a link preview...
* May start async data loads.
*
* @param {String} id
* @param {String} url
*/
prepLinkPreview: function(id, url)
{
oEmbed.lookup(url, function(data) {
var thumb = null;
var width = 100;
if (typeof data.thumbnail_url == "string") {
thumb = data.thumbnail_url;
if (typeof data.thumbnail_width !== "undefined") {
if (data.thumbnail_width < width) {
width = data.thumbnail_width;
}
}
} else if (data.type == 'photo' && typeof data.url == "string") {
thumb = data.url;
if (typeof data.width !== "undefined") {
if (data.width < width) {
width = data.width;
}
}
}
if (thumb) {
var link = $('<span class="inline-attachment"><a><img/></a></span>');
link.find('a')
.attr('href', url)
.attr('target', '_blank')
.last()
.find('img')
.attr('src', thumb)
.attr('width', width)
.attr('title', data.title || data.url || url);
$('#' + id).append(link);
}
});
},
/**
* Update the live preview section with links found in the given text.
* May start async data loads.
*
* @param {String} text: free-form input text
*/
previewLinks: function(text)
{
var old = LinkPreview.links;
var links = LinkPreview.findLinks(text);
// Check for existing common elements...
for (var i = 0; i < old.length && i < links.length; i++) {
if (links[i] != old[i]) {
// Change an existing entry!
var id = 'link-preview-' + i;
$('#' + id).html('');
LinkPreview.prepLinkPreview(id, links[i]);
}
}
if (links.length > old.length) {
// Adding new entries, whee!
for (var i = old.length; i < links.length; i++) {
var id = 'link-preview-' + i;
$('#link-preview').append('<span id="' + id + '"></span>');
LinkPreview.prepLinkPreview(id, links[i]);
}
} else if (old.length > links.length) {
// Remove preview entries for links that have been removed.
for (var i = links.length; i < old.length; i++) {
var id = 'link-preview-' + i;
$('#' + id).remove();
}
}
LinkPreview.links = links;
},
/**
* Clear out any link preview data.
*/
clear: function() {
LinkPreview.links = [];
$('#link-preview').empty();
}
};
SN.Init.LinkPreview = function(params) {
if (params.api) oEmbed.api = params.api;
if (params.width) oEmbed.width = params.width;
if (params.height) oEmbed.height = params.height;
$('#form_notice')
.append('<div id="link-preview" class="thumbnails"></div>')
.bind('reset', function() {
LinkPreview.clear();
});
// Piggyback on the counter update...
var origCounter = SN.U.Counter;
SN.U.Counter = function(form) {
LinkPreview.previewLinks($('#notice_data-text').val());
return origCounter(form);
}
}
})();
|
