1 :
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 nsGenConImageContent.
16 : *
17 : * The Initial Developer of the Original Code is the Mozilla Foundation.
18 : * Portions created by the Initial Developer are Copyright (C) 2004
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * L. David Baron <dbaron@dbaron.org> (original author)
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 : /**
39 : * A fake content node class so that the image frame for
40 : * content: url(foo);
41 : * in CSS can have an nsIImageLoadingContent but use an
42 : * imgIRequest that's already been loaded from the style system.
43 : */
44 :
45 : #include "nsContentCreatorFunctions.h"
46 : #include "nsXMLElement.h"
47 : #include "nsImageLoadingContent.h"
48 : #include "imgIRequest.h"
49 : #include "nsEventStates.h"
50 :
51 : class nsGenConImageContent : public nsXMLElement,
52 : public nsImageLoadingContent
53 : {
54 : public:
55 0 : nsGenConImageContent(already_AddRefed<nsINodeInfo> aNodeInfo)
56 0 : : nsXMLElement(aNodeInfo)
57 : {
58 : // nsImageLoadingContent starts out broken, so we start out
59 : // suppressed to match it.
60 0 : AddStatesSilently(NS_EVENT_STATE_SUPPRESSED);
61 0 : }
62 :
63 0 : nsresult Init(imgIRequest* aImageRequest)
64 : {
65 : // No need to notify, since we have no frame.
66 0 : return UseAsPrimaryRequest(aImageRequest, false);
67 : }
68 :
69 : // nsIContent overrides
70 : virtual nsEventStates IntrinsicState() const;
71 :
72 : private:
73 : virtual ~nsGenConImageContent();
74 :
75 : public:
76 : NS_DECL_ISUPPORTS_INHERITED
77 : };
78 :
79 0 : NS_IMPL_ISUPPORTS_INHERITED3(nsGenConImageContent, nsXMLElement,
80 : nsIImageLoadingContent, imgIContainerObserver, imgIDecoderObserver)
81 :
82 : nsresult
83 0 : NS_NewGenConImageContent(nsIContent** aResult, already_AddRefed<nsINodeInfo> aNodeInfo,
84 : imgIRequest* aImageRequest)
85 : {
86 0 : NS_PRECONDITION(aImageRequest, "Must have request!");
87 0 : nsGenConImageContent *it = new nsGenConImageContent(aNodeInfo);
88 0 : if (!it)
89 0 : return NS_ERROR_OUT_OF_MEMORY;
90 0 : NS_ADDREF(*aResult = it);
91 0 : nsresult rv = it->Init(aImageRequest);
92 0 : if (NS_FAILED(rv))
93 0 : NS_RELEASE(*aResult);
94 0 : return rv;
95 : }
96 :
97 0 : nsGenConImageContent::~nsGenConImageContent()
98 : {
99 0 : DestroyImageLoadingContent();
100 0 : }
101 :
102 : nsEventStates
103 0 : nsGenConImageContent::IntrinsicState() const
104 : {
105 0 : nsEventStates state = nsXMLElement::IntrinsicState();
106 :
107 0 : nsEventStates imageState = nsImageLoadingContent::ImageState();
108 0 : if (imageState.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED)) {
109 : // We should never be in an error state; if the image fails to load, we
110 : // just go to the suppressed state.
111 0 : imageState |= NS_EVENT_STATE_SUPPRESSED;
112 0 : imageState &= ~NS_EVENT_STATE_BROKEN;
113 : }
114 0 : imageState &= ~NS_EVENT_STATE_LOADING;
115 0 : return state | imageState;
116 : }
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