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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var Cc = Components.classes;
var Ci = Components.interfaces;
var Cu = Components.utils;
this.EXPORTED_SYMBOLS = [ "ContentLinkHandler" ];
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/NetUtil.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Feeds",
"resource:///modules/Feeds.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils",
"resource://gre/modules/BrowserUtils.jsm");
const SIZES_TELEMETRY_ENUM = {
NO_SIZES: 0,
ANY: 1,
DIMENSION: 2,
INVALID: 3,
};
this.ContentLinkHandler = {
init: function(chromeGlobal) {
chromeGlobal.addEventListener("DOMLinkAdded", (event) => {
this.onLinkEvent(event, chromeGlobal);
}, false);
chromeGlobal.addEventListener("DOMLinkChanged", (event) => {
this.onLinkEvent(event, chromeGlobal);
}, false);
},
onLinkEvent: function(event, chromeGlobal) {
var link = event.originalTarget;
var rel = link.rel && link.rel.toLowerCase();
if (!link || !link.ownerDocument || !rel || !link.href)
return;
// Ignore sub-frames (bugs 305472, 479408).
let window = link.ownerGlobal;
if (window != window.top)
return;
var feedAdded = false;
var iconAdded = false;
var searchAdded = false;
var rels = {};
for (let relString of rel.split(/\s+/))
rels[relString] = true;
for (let relVal in rels) {
switch (relVal) {
case "feed":
case "alternate":
if (!feedAdded && event.type == "DOMLinkAdded") {
if (!rels.feed && rels.alternate && rels.stylesheet)
break;
if (Feeds.isValidFeed(link, link.ownerDocument.nodePrincipal, "feed" in rels)) {
chromeGlobal.sendAsyncMessage("Link:AddFeed",
{type: link.type,
href: link.href,
title: link.title});
feedAdded = true;
}
}
break;
case "icon":
if (iconAdded || !Services.prefs.getBoolPref("browser.chrome.site_icons"))
break;
var uri = this.getLinkIconURI(link);
if (!uri)
break;
// Telemetry probes for measuring the sizes attribute
// usage and available dimensions.
let sizeHistogramTypes = Services.telemetry.
getHistogramById("LINK_ICON_SIZES_ATTR_USAGE");
let sizeHistogramDimension = Services.telemetry.
getHistogramById("LINK_ICON_SIZES_ATTR_DIMENSION");
let sizesType;
if (link.sizes.length) {
for (let size of link.sizes) {
if (size.toLowerCase() == "any") {
sizesType = SIZES_TELEMETRY_ENUM.ANY;
break;
} else {
let re = /^([1-9][0-9]*)x[1-9][0-9]*$/i;
let values = re.exec(size);
if (values && values.length > 1) {
sizesType = SIZES_TELEMETRY_ENUM.DIMENSION;
sizeHistogramDimension.add(parseInt(values[1]));
} else {
sizesType = SIZES_TELEMETRY_ENUM.INVALID;
break;
}
}
}
} else {
sizesType = SIZES_TELEMETRY_ENUM.NO_SIZES;
}
sizeHistogramTypes.add(sizesType);
chromeGlobal.sendAsyncMessage(
"Link:SetIcon",
{url: uri.spec, loadingPrincipal: link.ownerDocument.nodePrincipal});
iconAdded = true;
break;
case "search":
if (!searchAdded && event.type == "DOMLinkAdded") {
var type = link.type && link.type.toLowerCase();
type = type.replace(/^\s+|\s*(?:;.*)?$/g, "");
let re = /^(?:https?|ftp):/i;
if (type == "application/opensearchdescription+xml" && link.title &&
re.test(link.href))
{
let engine = { title: link.title, href: link.href };
chromeGlobal.sendAsyncMessage("Link:AddSearch",
{engine: engine,
url: link.ownerDocument.documentURI});
searchAdded = true;
}
}
break;
}
}
},
getLinkIconURI: function(aLink) {
let targetDoc = aLink.ownerDocument;
var uri = BrowserUtils.makeURI(aLink.href, targetDoc.characterSet);
try {
uri.userPass = "";
} catch (e) {
// some URIs are immutable
}
return uri;
},
};
|
