forked from GNUsocial/gnu-social
Ticket #2921: cleanup on LinkPreview to make fewer requests while typing. Will now wait for each link's preview request to complete (successfully or unsuccessfully) before re-running it)
This commit is contained in:
Brion Vibber
parent
fb1fc8a046
commit
bb50e773e6
|
|
@ -3,6 +3,9 @@
|
|||
*/
|
||||
|
||||
(function() {
|
||||
/**
|
||||
* Quickie wrapper around ooembed JSON lookup
|
||||
*/
|
||||
var oEmbed = {
|
||||
api: 'http://oohembed.com/oohembed',
|
||||
width: 100,
|
||||
|
|
@ -57,14 +60,24 @@
|
|||
maxheight: oEmbed.height,
|
||||
token: $('#token').val()
|
||||
};
|
||||
$.get(oEmbed.api, params, function(data, xhr) {
|
||||
callback(data);
|
||||
}, 'json');
|
||||
$.ajax({
|
||||
url: oEmbed.api,
|
||||
data: params,
|
||||
dataType: 'json',
|
||||
success: function(data, xhr) {
|
||||
callback(data);
|
||||
},
|
||||
error: function(xhr, textStatus, errorThrown) {
|
||||
callback(null);
|
||||
}
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
var LinkPreview = {
|
||||
links: [],
|
||||
state: [],
|
||||
refresh: [],
|
||||
|
||||
/**
|
||||
* Find URL links from the source text that may be interesting.
|
||||
|
|
@ -88,22 +101,26 @@
|
|||
* Start looking up info for a link preview...
|
||||
* May start async data loads.
|
||||
*
|
||||
* @param {String} id
|
||||
* @param {String} url
|
||||
* @param {number} col: column number to insert preview into
|
||||
*/
|
||||
prepLinkPreview: function(id, url)
|
||||
prepLinkPreview: function(col)
|
||||
{
|
||||
var id = 'link-preview-' + col;
|
||||
var url = LinkPreview.links[col];
|
||||
LinkPreview.refresh[col] = false;
|
||||
LinkPreview.markLoading(col);
|
||||
|
||||
oEmbed.lookup(url, function(data) {
|
||||
var thumb = null;
|
||||
var width = 100;
|
||||
if (typeof data.thumbnail_url == "string") {
|
||||
if (data && 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") {
|
||||
} else if (data && data.type == 'photo' && typeof data.url == "string") {
|
||||
thumb = data.url;
|
||||
if (typeof data.width !== "undefined") {
|
||||
if (data.width < width) {
|
||||
|
|
@ -111,6 +128,7 @@
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (thumb) {
|
||||
var link = $('<span class="inline-attachment"><a><img/></a></span>');
|
||||
link.find('a')
|
||||
|
|
@ -121,7 +139,19 @@
|
|||
.attr('src', thumb)
|
||||
.attr('width', width)
|
||||
.attr('title', data.title || data.url || url);
|
||||
$('#' + id).empty();
|
||||
$('#' + id).append(link);
|
||||
} else {
|
||||
// No thumbnail available or error retriving it.
|
||||
LinkPreview.clearLink(col);
|
||||
}
|
||||
|
||||
if (LinkPreview.refresh[col]) {
|
||||
// Darn user has typed more characters.
|
||||
// Go fetch another link!
|
||||
LinkPreview.prepLinkPreview(col);
|
||||
} else {
|
||||
LinkPreview.markDone(col);
|
||||
}
|
||||
});
|
||||
},
|
||||
|
|
@ -134,34 +164,57 @@
|
|||
*/
|
||||
previewLinks: function(text)
|
||||
{
|
||||
var i;
|
||||
var old = LinkPreview.links;
|
||||
var links = LinkPreview.findLinks(text);
|
||||
LinkPreview.links = links;
|
||||
|
||||
// Check for existing common elements...
|
||||
for (var i = 0; i < old.length && i < links.length; i++) {
|
||||
for (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 (LinkPreview.state[i] == "loading") {
|
||||
// Slate this column for a refresh when this one's done.
|
||||
LinkPreview.refresh[i] = true;
|
||||
} else {
|
||||
// Change an existing entry!
|
||||
LinkPreview.prepLinkPreview(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]);
|
||||
for (i = old.length; i < links.length; i++) {
|
||||
LinkPreview.addPreviewArea(i);
|
||||
LinkPreview.prepLinkPreview(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();
|
||||
for (i = links.length; i < old.length; i++) {
|
||||
LinkPreview.clearLink(i);
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
LinkPreview.links = links;
|
||||
addPreviewArea: function(col) {
|
||||
var id = 'link-preview-' + col;
|
||||
$('#link-preview').append('<span id="' + id + '"></span>');
|
||||
},
|
||||
|
||||
clearLink: function(col) {
|
||||
var id = 'link-preview-' + col;
|
||||
$('#' + id).html('');
|
||||
},
|
||||
|
||||
markLoading: function(col) {
|
||||
LinkPreview.state[col] = "loading";
|
||||
var id = 'link-preview-' + col;
|
||||
$('#' + id).attr('style', 'opacity: 0.5');
|
||||
},
|
||||
|
||||
markDone: function(col) {
|
||||
LinkPreview.state[col] = "done";
|
||||
var id = 'link-preview-' + col;
|
||||
$('#' + id).removeAttr('style');
|
||||
},
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Reference in New Issue