summaryrefslogtreecommitdiffstats
path: root/dom/html/HTMLSourceElement.cpp
blob: 4d202885c50fc2cb07b053105b3102a24fa1ea3e (plain)
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#include "mozilla/dom/HTMLSourceElement.h"
#include "mozilla/dom/HTMLSourceElementBinding.h"

#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/ResponsiveImageSelector.h"
#include "mozilla/dom/MediaSource.h"

#include "nsGkAtoms.h"

#include "nsIMediaList.h"
#include "nsCSSParser.h"
#include "nsHostObjectProtocolHandler.h"

#include "mozilla/Preferences.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(Source)

namespace mozilla {
namespace dom {

HTMLSourceElement::HTMLSourceElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
  : nsGenericHTMLElement(aNodeInfo)
{
}

HTMLSourceElement::~HTMLSourceElement()
{
}

NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLSourceElement, nsGenericHTMLElement,
                                   mSrcMediaSource)

NS_IMPL_ADDREF_INHERITED(HTMLSourceElement, nsGenericHTMLElement)
NS_IMPL_RELEASE_INHERITED(HTMLSourceElement, nsGenericHTMLElement)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(HTMLSourceElement)
  NS_INTERFACE_MAP_ENTRY(nsIDOMHTMLSourceElement)
NS_INTERFACE_MAP_END_INHERITING(nsGenericHTMLElement)

NS_IMPL_ELEMENT_CLONE(HTMLSourceElement)

NS_IMPL_URI_ATTR(HTMLSourceElement, Src, src)
NS_IMPL_STRING_ATTR(HTMLSourceElement, Type, type)
NS_IMPL_STRING_ATTR(HTMLSourceElement, Srcset, srcset)
NS_IMPL_STRING_ATTR(HTMLSourceElement, Sizes, sizes)
NS_IMPL_STRING_ATTR(HTMLSourceElement, Media, media)

bool
HTMLSourceElement::MatchesCurrentMedia()
{
  if (mMediaList) {
    nsIPresShell* presShell = OwnerDoc()->GetShell();
    nsPresContext* pctx = presShell ? presShell->GetPresContext() : nullptr;
    return pctx && mMediaList->Matches(pctx, nullptr);
  }

  // No media specified
  return true;
}

/* static */ bool
HTMLSourceElement::WouldMatchMediaForDocument(const nsAString& aMedia,
                                              const nsIDocument *aDocument)
{
  if (aMedia.IsEmpty()) {
    return true;
  }

  nsIPresShell* presShell = aDocument->GetShell();
  nsPresContext* pctx = presShell ? presShell->GetPresContext() : nullptr;

  nsCSSParser cssParser;
  RefPtr<nsMediaList> mediaList = new nsMediaList();
  cssParser.ParseMediaList(aMedia, nullptr, 0, mediaList, false);

  return pctx && mediaList->Matches(pctx, nullptr);
}

void
HTMLSourceElement::UpdateMediaList(const nsAttrValue* aValue)
{
  mMediaList = nullptr;
  nsString mediaStr;
  if (!aValue || (mediaStr = aValue->GetStringValue()).IsEmpty()) {
    return;
  }

  nsCSSParser cssParser;
  mMediaList = new nsMediaList();
  cssParser.ParseMediaList(mediaStr, nullptr, 0, mMediaList, false);
}

nsresult
HTMLSourceElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                                const nsAttrValue* aValue,
                                const nsAttrValue* aOldValue, bool aNotify)
{
  // If we are associated with a <picture> with a valid <img>, notify it of
  // responsive parameter changes
  Element *parent = nsINode::GetParentElement();
  if (aNameSpaceID == kNameSpaceID_None &&
      (aName == nsGkAtoms::srcset ||
       aName == nsGkAtoms::sizes ||
       aName == nsGkAtoms::media ||
       aName == nsGkAtoms::type) &&
      parent && parent->IsHTMLElement(nsGkAtoms::picture)) {
    nsString strVal = aValue ? aValue->GetStringValue() : EmptyString();
    // Find all img siblings after this <source> and notify them of the change
    nsCOMPtr<nsIContent> sibling = AsContent();
    while ( (sibling = sibling->GetNextSibling()) ) {
      if (sibling->IsHTMLElement(nsGkAtoms::img)) {
        HTMLImageElement *img = static_cast<HTMLImageElement*>(sibling.get());
        if (aName == nsGkAtoms::srcset) {
          img->PictureSourceSrcsetChanged(AsContent(), strVal, aNotify);
        } else if (aName == nsGkAtoms::sizes) {
          img->PictureSourceSizesChanged(AsContent(), strVal, aNotify);
        } else if (aName == nsGkAtoms::media) {
          UpdateMediaList(aValue);
          img->PictureSourceMediaOrTypeChanged(AsContent(), aNotify);
        } else if (aName == nsGkAtoms::type) {
          img->PictureSourceMediaOrTypeChanged(AsContent(), aNotify);
        }
      }
    }

  } else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::media) {
    UpdateMediaList(aValue);
  } else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::src) {
    mSrcMediaSource = nullptr;
    if (aValue) {
      nsString srcStr = aValue->GetStringValue();
      nsCOMPtr<nsIURI> uri;
      NewURIFromString(srcStr, getter_AddRefs(uri));
      if (uri && IsMediaSourceURI(uri)) {
        NS_GetSourceForMediaSourceURI(uri, getter_AddRefs(mSrcMediaSource));
      }
    }
  }

  return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName,
                                            aValue, aOldValue, aNotify);
}

nsresult
HTMLSourceElement::BindToTree(nsIDocument *aDocument,
                              nsIContent *aParent,
                              nsIContent *aBindingParent,
                              bool aCompileEventHandlers)
{
  nsresult rv = nsGenericHTMLElement::BindToTree(aDocument,
                                                 aParent,
                                                 aBindingParent,
                                                 aCompileEventHandlers);
  NS_ENSURE_SUCCESS(rv, rv);

  if (aParent && aParent->IsNodeOfType(nsINode::eMEDIA)) {
    HTMLMediaElement* media = static_cast<HTMLMediaElement*>(aParent);
    media->NotifyAddedSource();
  }

  return NS_OK;
}

JSObject*
HTMLSourceElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
  return HTMLSourceElementBinding::Wrap(aCx, this, aGivenProto);
}

} // namespace dom
} // namespace mozilla