1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Boris Zbarsky <bzbarsky@mit.edu>.
19 : * Portions created by the Initial Developer are Copyright (C) 2005
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #include "nsWebNavigationInfo.h"
39 : #include "nsIWebNavigation.h"
40 : #include "nsString.h"
41 : #include "nsServiceManagerUtils.h"
42 : #include "nsIDocumentLoaderFactory.h"
43 : #include "nsIPluginHost.h"
44 : #include "nsContentUtils.h"
45 :
46 0 : NS_IMPL_ISUPPORTS1(nsWebNavigationInfo, nsIWebNavigationInfo)
47 :
48 : #define CONTENT_DLF_CONTRACT "@mozilla.org/content/document-loader-factory;1"
49 : #define PLUGIN_DLF_CONTRACT \
50 : "@mozilla.org/content/plugin/document-loader-factory;1"
51 :
52 : nsresult
53 0 : nsWebNavigationInfo::Init()
54 : {
55 : nsresult rv;
56 0 : mCategoryManager = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
57 0 : NS_ENSURE_SUCCESS(rv, rv);
58 :
59 0 : mImgLoader = do_GetService("@mozilla.org/image/loader;1", &rv);
60 :
61 0 : return rv;
62 : }
63 :
64 : NS_IMETHODIMP
65 0 : nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
66 : nsIWebNavigation* aWebNav,
67 : PRUint32* aIsTypeSupported)
68 : {
69 0 : NS_PRECONDITION(aIsTypeSupported, "null out param?");
70 :
71 : // Note to self: aWebNav could be an nsWebBrowser or an nsDocShell here (or
72 : // an nsSHistory, but not much we can do with that). So if we start using
73 : // it here, we need to be careful to get to the docshell correctly.
74 :
75 : // For now just report what the Gecko-Content-Viewers category has
76 : // to say for itself.
77 0 : *aIsTypeSupported = nsIWebNavigationInfo::UNSUPPORTED;
78 :
79 0 : const nsCString& flatType = PromiseFlatCString(aType);
80 0 : nsresult rv = IsTypeSupportedInternal(flatType, aIsTypeSupported);
81 0 : NS_ENSURE_SUCCESS(rv, rv);
82 :
83 0 : if (*aIsTypeSupported) {
84 0 : return rv;
85 : }
86 :
87 : // Try reloading plugins in case they've changed.
88 : nsCOMPtr<nsIPluginHost> pluginHost =
89 0 : do_GetService(MOZ_PLUGIN_HOST_CONTRACTID);
90 0 : if (pluginHost) {
91 : // false will ensure that currently running plugins will not
92 : // be shut down
93 0 : rv = pluginHost->ReloadPlugins(false);
94 0 : if (NS_SUCCEEDED(rv)) {
95 : // OK, we reloaded plugins and there were new ones
96 : // (otherwise NS_ERROR_PLUGINS_PLUGINSNOTCHANGED would have
97 : // been returned). Try checking whether we can handle the
98 : // content now.
99 0 : return IsTypeSupportedInternal(flatType, aIsTypeSupported);
100 : }
101 : }
102 :
103 0 : return NS_OK;
104 : }
105 :
106 : nsresult
107 0 : nsWebNavigationInfo::IsTypeSupportedInternal(const nsCString& aType,
108 : PRUint32* aIsSupported)
109 : {
110 0 : NS_PRECONDITION(aIsSupported, "Null out param?");
111 :
112 :
113 0 : nsContentUtils::ContentViewerType vtype = nsContentUtils::TYPE_UNSUPPORTED;
114 :
115 : nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory =
116 0 : nsContentUtils::FindInternalContentViewer(aType.get(), &vtype);
117 :
118 0 : switch (vtype) {
119 : case nsContentUtils::TYPE_UNSUPPORTED:
120 0 : *aIsSupported = nsIWebNavigationInfo::UNSUPPORTED;
121 0 : break;
122 :
123 : case nsContentUtils::TYPE_PLUGIN:
124 0 : *aIsSupported = nsIWebNavigationInfo::PLUGIN;
125 0 : break;
126 :
127 : case nsContentUtils::TYPE_UNKNOWN:
128 0 : *aIsSupported = nsIWebNavigationInfo::OTHER;
129 0 : break;
130 :
131 : case nsContentUtils::TYPE_CONTENT:
132 0 : bool isImage = false;
133 0 : mImgLoader->SupportImageWithMimeType(aType.get(), &isImage);
134 0 : if (isImage) {
135 0 : *aIsSupported = nsIWebNavigationInfo::IMAGE;
136 : }
137 : else {
138 0 : *aIsSupported = nsIWebNavigationInfo::OTHER;
139 : }
140 0 : break;
141 : }
142 :
143 0 : return NS_OK;
144 : }
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