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/* 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/. */
#ifndef nsHtml5SpeculativeLoad_h
#define nsHtml5SpeculativeLoad_h
#include "nsString.h"
#include "nsContentUtils.h"
class nsHtml5TreeOpExecutor;
enum eHtml5SpeculativeLoad {
#ifdef DEBUG
eSpeculativeLoadUninitialized,
#endif
eSpeculativeLoadBase,
eSpeculativeLoadCSP,
eSpeculativeLoadMetaReferrer,
eSpeculativeLoadImage,
eSpeculativeLoadOpenPicture,
eSpeculativeLoadEndPicture,
eSpeculativeLoadPictureSource,
eSpeculativeLoadScript,
eSpeculativeLoadScriptFromHead,
eSpeculativeLoadStyle,
eSpeculativeLoadManifest,
eSpeculativeLoadSetDocumentCharset,
eSpeculativeLoadSetDocumentMode,
eSpeculativeLoadPreconnect
};
class nsHtml5SpeculativeLoad {
public:
nsHtml5SpeculativeLoad();
~nsHtml5SpeculativeLoad();
inline void InitBase(const nsAString& aUrl)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadBase;
mUrl.Assign(aUrl);
}
inline void InitMetaCSP(const nsAString& aCSP) {
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadCSP;
mMetaCSP.Assign(
nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(aCSP));
}
inline void InitMetaReferrerPolicy(const nsAString& aReferrerPolicy) {
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadMetaReferrer;
mReferrerPolicy.Assign(
nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(aReferrerPolicy));
}
inline void InitImage(const nsAString& aUrl,
const nsAString& aCrossOrigin,
const nsAString& aReferrerPolicy,
const nsAString& aSrcset,
const nsAString& aSizes)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadImage;
mUrl.Assign(aUrl);
mCrossOrigin.Assign(aCrossOrigin);
mReferrerPolicy.Assign(
nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(aReferrerPolicy));
mSrcset.Assign(aSrcset);
mSizes.Assign(aSizes);
}
// <picture> elements have multiple <source> nodes followed by an <img>,
// where we use the first valid source, which may be the img. Because we
// can't determine validity at this point without parsing CSS and getting
// main thread state, we push preload operations for picture pushed and
// popped, so that the target of the preload ops can determine what picture
// and nesting level each source/img from the main preloading code exists
// at.
inline void InitOpenPicture()
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadOpenPicture;
}
inline void InitEndPicture()
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadEndPicture;
}
inline void InitPictureSource(const nsAString& aSrcset,
const nsAString& aSizes,
const nsAString& aType,
const nsAString& aMedia)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadPictureSource;
mSrcset.Assign(aSrcset);
mSizes.Assign(aSizes);
mTypeOrCharsetSourceOrDocumentMode.Assign(aType);
mMedia.Assign(aMedia);
}
inline void InitScript(const nsAString& aUrl,
const nsAString& aCharset,
const nsAString& aType,
const nsAString& aCrossOrigin,
const nsAString& aIntegrity,
bool aParserInHead)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = aParserInHead ?
eSpeculativeLoadScriptFromHead : eSpeculativeLoadScript;
mUrl.Assign(aUrl);
mCharset.Assign(aCharset);
mTypeOrCharsetSourceOrDocumentMode.Assign(aType);
mCrossOrigin.Assign(aCrossOrigin);
mIntegrity.Assign(aIntegrity);
}
inline void InitStyle(const nsAString& aUrl, const nsAString& aCharset,
const nsAString& aCrossOrigin,
const nsAString& aIntegrity)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadStyle;
mUrl.Assign(aUrl);
mCharset.Assign(aCharset);
mCrossOrigin.Assign(aCrossOrigin);
mIntegrity.Assign(aIntegrity);
}
/**
* "Speculative" manifest loads aren't truly speculative--if a manifest
* gets loaded, we are committed to it. There can never be a <script>
* before the manifest, so the situation of having to undo a manifest due
* to document.write() never arises. The reason why a parser
* thread-discovered manifest gets loaded via the speculative load queue
* as opposed to tree operation queue is that the manifest must get
* processed before any actual speculative loads such as scripts. Thus,
* manifests seen by the parser thread have to maintain the queue order
* relative to true speculative loads. See bug 541079.
*/
inline void InitManifest(const nsAString& aUrl)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadManifest;
mUrl.Assign(aUrl);
}
/**
* "Speculative" charset setting isn't truly speculative. If the charset
* is set via this operation, we are committed to it unless chardet or
* a late meta cause a reload. The reason why a parser
* thread-discovered charset gets communicated via the speculative load
* queue as opposed to tree operation queue is that the charset change
* must get processed before any actual speculative loads such as style
* sheets. Thus, encoding decisions by the parser thread have to maintain
* the queue order relative to true speculative loads. See bug 675499.
*/
inline void InitSetDocumentCharset(nsACString& aCharset,
int32_t aCharsetSource)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadSetDocumentCharset;
CopyUTF8toUTF16(aCharset, mCharset);
mTypeOrCharsetSourceOrDocumentMode.Assign((char16_t)aCharsetSource);
}
/**
* Speculative document mode setting isn't really speculative. Once it
* happens, we are committed to it. However, this information needs to
* travel in the speculation queue in order to have this information
* available before parsing the speculatively loaded style sheets.
*/
inline void InitSetDocumentMode(nsHtml5DocumentMode aMode)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadSetDocumentMode;
mTypeOrCharsetSourceOrDocumentMode.Assign((char16_t)aMode);
}
inline void InitPreconnect(const nsAString& aUrl,
const nsAString& aCrossOrigin)
{
NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
"Trying to reinitialize a speculative load!");
mOpCode = eSpeculativeLoadPreconnect;
mUrl.Assign(aUrl);
mCrossOrigin.Assign(aCrossOrigin);
}
void Perform(nsHtml5TreeOpExecutor* aExecutor);
private:
eHtml5SpeculativeLoad mOpCode;
nsString mUrl;
nsString mReferrerPolicy;
nsString mMetaCSP;
/**
* If mOpCode is eSpeculativeLoadStyle or eSpeculativeLoadScript[FromHead]
* then this is the value of the "charset" attribute. For
* eSpeculativeLoadSetDocumentCharset it is the charset that the
* document's charset is being set to. Otherwise it's empty.
*/
nsString mCharset;
/**
* If mOpCode is eSpeculativeLoadSetDocumentCharset, this is a
* one-character string whose single character's code point is to be
* interpreted as a charset source integer. If mOpCode is
* eSpeculativeLoadSetDocumentMode, this is a one-character string whose
* single character's code point is to be interpreted as an
* nsHtml5DocumentMode. Otherwise, it is empty or the value of the type
* attribute.
*/
nsString mTypeOrCharsetSourceOrDocumentMode;
/**
* If mOpCode is eSpeculativeLoadImage or eSpeculativeLoadScript[FromHead]
* or eSpeculativeLoadPreconnect this is the value of the "crossorigin"
* attribute. If the attribute is not set, this will be a void string.
*/
nsString mCrossOrigin;
/**
* If mOpCode is eSpeculativeLoadImage or eSpeculativeLoadPictureSource,
* this is the value of "srcset" attribute. If the attribute is not set,
* this will be a void string.
*/
nsString mSrcset;
/**
* If mOpCode is eSpeculativeLoadPictureSource, this is the value of "sizes"
* attribute. If the attribute is not set, this will be a void string.
*/
nsString mSizes;
/**
* If mOpCode is eSpeculativeLoadPictureSource, this is the value of "media"
* attribute. If the attribute is not set, this will be a void string.
*/
nsString mMedia;
/**
* If mOpCode is eSpeculativeLoadScript[FromHead], this is the value of the
* "integrity" attribute. If the attribute is not set, this will be a void
* string.
*/
nsString mIntegrity;
};
#endif // nsHtml5SpeculativeLoad_h
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