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
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "core/html/HTMLImageLoader.h"
#include "core/HTMLNames.h"
#include "core/dom/Element.h"
#include "core/events/Event.h"
#include "core/fetch/ResourceLoadingLog.h"
#include "core/html/HTMLImageElement.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/HTMLObjectElement.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/loader/resource/ImageResourceContent.h"
namespace blink {
using namespace HTMLNames;
HTMLImageLoader::HTMLImageLoader(Element* element) : ImageLoader(element) {}
HTMLImageLoader::~HTMLImageLoader() {}
void HTMLImageLoader::dispatchLoadEvent() {
RESOURCE_LOADING_DVLOG(1) << "HTMLImageLoader::dispatchLoadEvent " << this;
// HTMLVideoElement uses this class to load the poster image, but it should
// not fire events for loading or failure.
if (isHTMLVideoElement(*element()))
return;
bool errorOccurred = image()->errorOccurred();
if (isHTMLObjectElement(*element()) && !errorOccurred) {
// An <object> considers a 404 to be an error and should fire onerror.
errorOccurred = (image()->response().httpStatusCode() >= 400);
}
element()->dispatchEvent(Event::create(errorOccurred ? EventTypeNames::error
: EventTypeNames::load));
}
void HTMLImageLoader::noImageResourceToLoad() {
// FIXME: Use fallback content even when there is no alt-text. The only
// blocker is the large amount of rebaselining it requires.
if (toHTMLElement(element())->altText().isEmpty())
return;
if (isHTMLImageElement(element()))
toHTMLImageElement(element())->ensureCollapsedOrFallbackContent();
else if (isHTMLInputElement(element()))
toHTMLInputElement(element())->ensureFallbackContent();
}
void HTMLImageLoader::imageNotifyFinished(ImageResourceContent*) {
ImageResourceContent* cachedImage = image();
Element* element = this->element();
ImageLoader::imageNotifyFinished(cachedImage);
bool loadError = cachedImage->errorOccurred();
if (isHTMLImageElement(*element)) {
if (loadError)
toHTMLImageElement(element)->ensureCollapsedOrFallbackContent();
else
toHTMLImageElement(element)->ensurePrimaryContent();
}
if (isHTMLInputElement(*element)) {
if (loadError)
toHTMLInputElement(element)->ensureFallbackContent();
else
toHTMLInputElement(element)->ensurePrimaryContent();
}
if ((loadError || cachedImage->response().httpStatusCode() >= 400) &&
isHTMLObjectElement(*element))
toHTMLObjectElement(element)->renderFallbackContent();
}
} // namespace blink
|
