gecko-dev/parser/html/nsHtml5TreeOperation.h

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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 nsHtml5TreeOperation_h
#define nsHtml5TreeOperation_h
#include "nsHtml5DocumentMode.h"
#include "nsHtml5HtmlAttributes.h"
#include "nsXPCOMStrings.h"
#include "mozilla/dom/FromParser.h"
class nsIContent;
class nsHtml5TreeOpExecutor;
class nsHtml5DocumentBuilder;
enum eHtml5TreeOperation {
eTreeOpUninitialized,
// main HTML5 ops
eTreeOpAppend,
eTreeOpDetach,
eTreeOpAppendChildrenToNewParent,
eTreeOpFosterParent,
eTreeOpAppendToDocument,
eTreeOpAddAttributes,
eTreeOpDocumentMode,
eTreeOpCreateElementNetwork,
eTreeOpCreateElementNotNetwork,
eTreeOpSetFormElement,
eTreeOpAppendText,
eTreeOpAppendIsindexPrompt,
eTreeOpFosterParentText,
eTreeOpAppendComment,
eTreeOpAppendCommentToDocument,
eTreeOpAppendDoctypeToDocument,
eTreeOpGetDocumentFragmentForTemplate,
eTreeOpGetFosterParent,
// Gecko-specific on-pop ops
eTreeOpMarkAsBroken,
eTreeOpRunScript,
eTreeOpRunScriptAsyncDefer,
eTreeOpPreventScriptExecution,
eTreeOpDoneAddingChildren,
eTreeOpDoneCreatingElement,
eTreeOpSetDocumentCharset,
eTreeOpNeedsCharsetSwitchTo,
eTreeOpUpdateStyleSheet,
eTreeOpProcessMeta,
eTreeOpProcessOfflineManifest,
eTreeOpMarkMalformedIfScript,
eTreeOpStreamEnded,
eTreeOpSetStyleLineNumber,
eTreeOpSetScriptLineNumberAndFreeze,
eTreeOpSvgLoad,
eTreeOpMaybeComplainAboutCharset,
eTreeOpAddClass,
eTreeOpAddViewSourceHref,
eTreeOpAddViewSourceBase,
eTreeOpAddError,
eTreeOpAddLineNumberId,
eTreeOpAddErrorAtom,
eTreeOpAddErrorTwoAtoms,
eTreeOpStartLayout
};
class nsHtml5TreeOperationStringPair {
private:
nsString mPublicId;
nsString mSystemId;
public:
nsHtml5TreeOperationStringPair(const nsAString& aPublicId,
const nsAString& aSystemId)
: mPublicId(aPublicId)
, mSystemId(aSystemId)
{
MOZ_COUNT_CTOR(nsHtml5TreeOperationStringPair);
}
~nsHtml5TreeOperationStringPair()
{
MOZ_COUNT_DTOR(nsHtml5TreeOperationStringPair);
}
inline void Get(nsAString& aPublicId, nsAString& aSystemId)
{
aPublicId.Assign(mPublicId);
aSystemId.Assign(mSystemId);
}
};
class nsHtml5TreeOperation {
public:
/**
* Atom is used inside the parser core are either static atoms that are
* the same as Gecko-wide static atoms or they are dynamic atoms scoped by
* both thread and parser to a particular nsHtml5AtomTable. In order to
* such scoped atoms coming into contact with the rest of Gecko, atoms
* that are about to exit the parser must go through this method which
* reobtains dynamic atoms from the Gecko-global atom table.
*
* @param aAtom a potentially parser-scoped atom
* @return an nsIAtom that's pointer comparable on the main thread with
* other not-parser atoms.
*/
static inline already_AddRefed<nsIAtom> Reget(nsIAtom* aAtom)
{
if (!aAtom || aAtom->IsStaticAtom()) {
return dont_AddRef(aAtom);
}
nsAutoString str;
aAtom->ToString(str);
return do_GetAtom(str);
}
static nsresult AppendTextToTextNode(const char16_t* aBuffer,
uint32_t aLength,
nsIContent* aTextNode,
nsHtml5DocumentBuilder* aBuilder);
static nsresult AppendText(const char16_t* aBuffer,
uint32_t aLength,
nsIContent* aParent,
nsHtml5DocumentBuilder* aBuilder);
static nsresult Append(nsIContent* aNode,
nsIContent* aParent,
nsHtml5DocumentBuilder* aBuilder);
static nsresult AppendToDocument(nsIContent* aNode,
nsHtml5DocumentBuilder* aBuilder);
static void Detach(nsIContent* aNode, nsHtml5DocumentBuilder* aBuilder);
static nsresult AppendChildrenToNewParent(nsIContent* aNode,
nsIContent* aParent,
nsHtml5DocumentBuilder* aBuilder);
static nsresult FosterParent(nsIContent* aNode,
nsIContent* aParent,
nsIContent* aTable,
nsHtml5DocumentBuilder* aBuilder);
static nsresult AddAttributes(nsIContent* aNode,
nsHtml5HtmlAttributes* aAttributes,
nsHtml5DocumentBuilder* aBuilder);
static nsIContent* CreateElement(int32_t aNs,
nsIAtom* aName,
nsHtml5HtmlAttributes* aAttributes,
mozilla::dom::FromParser aFromParser,
nsNodeInfoManager* aNodeInfoManager,
nsHtml5DocumentBuilder* aBuilder);
static void SetFormElement(nsIContent* aNode, nsIContent* aParent);
static nsresult AppendIsindexPrompt(nsIContent* parent,
nsHtml5DocumentBuilder* aBuilder);
static nsresult FosterParentText(nsIContent* aStackParent,
char16_t* aBuffer,
uint32_t aLength,
nsIContent* aTable,
nsHtml5DocumentBuilder* aBuilder);
static nsresult AppendComment(nsIContent* aParent,
char16_t* aBuffer,
int32_t aLength,
nsHtml5DocumentBuilder* aBuilder);
static nsresult AppendCommentToDocument(char16_t* aBuffer,
int32_t aLength,
nsHtml5DocumentBuilder* aBuilder);
static nsresult AppendDoctypeToDocument(nsIAtom* aName,
const nsAString& aPublicId,
const nsAString& aSystemId,
nsHtml5DocumentBuilder* aBuilder);
static nsIContent* GetDocumentFragmentForTemplate(nsIContent* aNode);
static nsIContent* GetFosterParent(nsIContent* aTable, nsIContent* aStackParent);
static void PreventScriptExecution(nsIContent* aNode);
static void DoneAddingChildren(nsIContent* aNode);
static void DoneCreatingElement(nsIContent* aNode);
static void SvgLoad(nsIContent* aNode);
static void MarkMalformedIfScript(nsIContent* aNode);
nsHtml5TreeOperation();
~nsHtml5TreeOperation();
inline void Init(eHtml5TreeOperation aOpCode)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
mOpCode = aOpCode;
}
inline void Init(eHtml5TreeOperation aOpCode, nsIContentHandle* aNode)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
mOpCode = aOpCode;
mOne.node = static_cast<nsIContent**>(aNode);
}
inline void Init(eHtml5TreeOperation aOpCode,
nsIContentHandle* aNode,
nsIContentHandle* aParent)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
NS_PRECONDITION(aParent, "Initialized tree op with null parent.");
mOpCode = aOpCode;
mOne.node = static_cast<nsIContent**>(aNode);
mTwo.node = static_cast<nsIContent**>(aParent);
}
inline void Init(eHtml5TreeOperation aOpCode,
const nsACString& aString,
int32_t aInt32)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
int32_t len = aString.Length();
char* str = new char[len + 1];
const char* start = aString.BeginReading();
for (int32_t i = 0; i < len; ++i) {
str[i] = start[i];
}
str[len] = '\0';
mOpCode = aOpCode;
mOne.charPtr = str;
mFour.integer = aInt32;
}
inline void Init(eHtml5TreeOperation aOpCode,
const nsACString& aString,
int32_t aInt32,
int32_t aLineNumber)
{
Init(aOpCode, aString, aInt32);
mTwo.integer = aLineNumber;
}
inline void Init(eHtml5TreeOperation aOpCode,
nsIContentHandle* aNode,
nsIContentHandle* aParent,
nsIContentHandle* aTable)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
NS_PRECONDITION(aParent, "Initialized tree op with null parent.");
NS_PRECONDITION(aTable, "Initialized tree op with null table.");
mOpCode = aOpCode;
mOne.node = static_cast<nsIContent**>(aNode);
mTwo.node = static_cast<nsIContent**>(aParent);
mThree.node = static_cast<nsIContent**>(aTable);
}
inline void Init(nsHtml5DocumentMode aMode)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
mOpCode = eTreeOpDocumentMode;
mOne.mode = aMode;
}
inline void InitScript(nsIContentHandle* aNode)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
mOpCode = eTreeOpRunScript;
mOne.node = static_cast<nsIContent**>(aNode);
mTwo.state = nullptr;
}
inline void Init(int32_t aNamespace,
nsIAtom* aName,
nsHtml5HtmlAttributes* aAttributes,
nsIContentHandle* aTarget,
nsIContentHandle* aIntendedParent,
bool aFromNetwork)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aName, "Initialized tree op with null name.");
NS_PRECONDITION(aTarget, "Initialized tree op with null target node.");
mOpCode = aFromNetwork ?
eTreeOpCreateElementNetwork :
eTreeOpCreateElementNotNetwork;
mFour.integer = aNamespace;
mFive.node = static_cast<nsIContent**>(aIntendedParent);
mOne.node = static_cast<nsIContent**>(aTarget);
mTwo.atom = aName;
if (aAttributes == nsHtml5HtmlAttributes::EMPTY_ATTRIBUTES) {
mThree.attributes = nullptr;
} else {
mThree.attributes = aAttributes;
}
}
inline void Init(eHtml5TreeOperation aOpCode,
char16_t* aBuffer,
int32_t aLength,
nsIContentHandle* aStackParent,
nsIContentHandle* aTable)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aBuffer, "Initialized tree op with null buffer.");
mOpCode = aOpCode;
mOne.node = static_cast<nsIContent**>(aStackParent);
mTwo.unicharPtr = aBuffer;
mThree.node = static_cast<nsIContent**>(aTable);
mFour.integer = aLength;
}
inline void Init(eHtml5TreeOperation aOpCode,
char16_t* aBuffer,
int32_t aLength,
nsIContentHandle* aParent)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aBuffer, "Initialized tree op with null buffer.");
mOpCode = aOpCode;
mOne.node = static_cast<nsIContent**>(aParent);
mTwo.unicharPtr = aBuffer;
mFour.integer = aLength;
}
inline void Init(eHtml5TreeOperation aOpCode,
char16_t* aBuffer,
int32_t aLength)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aBuffer, "Initialized tree op with null buffer.");
mOpCode = aOpCode;
mTwo.unicharPtr = aBuffer;
mFour.integer = aLength;
}
inline void Init(nsIContentHandle* aElement,
nsHtml5HtmlAttributes* aAttributes)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aElement, "Initialized tree op with null element.");
mOpCode = eTreeOpAddAttributes;
mOne.node = static_cast<nsIContent**>(aElement);
mTwo.attributes = aAttributes;
}
inline void Init(nsIAtom* aName,
const nsAString& aPublicId,
const nsAString& aSystemId)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
mOpCode = eTreeOpAppendDoctypeToDocument;
mOne.atom = aName;
mTwo.stringPair = new nsHtml5TreeOperationStringPair(aPublicId, aSystemId);
}
inline void Init(nsIContentHandle* aElement,
const char* aMsgId,
nsIAtom* aAtom,
nsIAtom* aOtherAtom)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
mOpCode = eTreeOpAddError;
mOne.node = static_cast<nsIContent**>(aElement);
mTwo.charPtr = (char*)aMsgId;
mThree.atom = aAtom;
mFour.atom = aOtherAtom;
}
inline void Init(nsIContentHandle* aElement,
const char* aMsgId,
nsIAtom* aAtom)
{
Init(aElement, aMsgId, aAtom, nullptr);
}
inline void Init(nsIContentHandle* aElement,
const char* aMsgId)
{
Init(aElement, aMsgId, nullptr, nullptr);
}
inline void Init(const char* aMsgId,
bool aError,
int32_t aLineNumber)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
mOpCode = eTreeOpMaybeComplainAboutCharset;
mOne.charPtr = const_cast<char*>(aMsgId);
mTwo.integer = aError;
mThree.integer = aLineNumber;
}
inline void Init(eHtml5TreeOperation aOpCode, const nsAString& aString)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
char16_t* str = NS_StringCloneData(aString);
mOpCode = aOpCode;
mOne.unicharPtr = str;
}
inline void Init(eHtml5TreeOperation aOpCode,
nsIContentHandle* aNode,
int32_t aInt)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
mOpCode = aOpCode;
mOne.node = static_cast<nsIContent**>(aNode);
mFour.integer = aInt;
}
inline void Init(nsresult aRv)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(NS_FAILED(aRv), "Initialized tree op with non-failure.");
mOpCode = eTreeOpMarkAsBroken;
mOne.result = aRv;
}
inline void InitAddClass(nsIContentHandle* aNode, const char16_t* aClass)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
NS_PRECONDITION(aClass, "Initialized tree op with null string.");
// aClass must be a literal string that does not need freeing
mOpCode = eTreeOpAddClass;
mOne.node = static_cast<nsIContent**>(aNode);
mTwo.unicharPtr = (char16_t*)aClass;
}
inline void InitAddLineNumberId(nsIContentHandle* aNode,
const int32_t aLineNumber)
{
NS_PRECONDITION(mOpCode == eTreeOpUninitialized,
"Op code must be uninitialized when initializing.");
NS_PRECONDITION(aNode, "Initialized tree op with null node.");
NS_PRECONDITION(aLineNumber > 0, "Initialized tree op with line number.");
// aClass must be a literal string that does not need freeing
mOpCode = eTreeOpAddLineNumberId;
mOne.node = static_cast<nsIContent**>(aNode);
mFour.integer = aLineNumber;
}
inline bool IsRunScript()
{
return mOpCode == eTreeOpRunScript;
}
inline void SetSnapshot(nsAHtml5TreeBuilderState* aSnapshot, int32_t aLine)
{
NS_ASSERTION(IsRunScript(),
"Setting a snapshot for a tree operation other than eTreeOpRunScript!");
NS_PRECONDITION(aSnapshot, "Initialized tree op with null snapshot.");
mTwo.state = aSnapshot;
mFour.integer = aLine;
}
nsresult Perform(nsHtml5TreeOpExecutor* aBuilder,
nsIContent** aScriptElement);
private:
// possible optimization:
// Make the queue take items the size of pointer and make the op code
// decide how many operands it dequeues after it.
eHtml5TreeOperation mOpCode;
union {
nsIContent** node;
nsIAtom* atom;
nsHtml5HtmlAttributes* attributes;
nsHtml5DocumentMode mode;
char16_t* unicharPtr;
char* charPtr;
nsHtml5TreeOperationStringPair* stringPair;
nsAHtml5TreeBuilderState* state;
int32_t integer;
nsresult result;
} mOne, mTwo, mThree, mFour, mFive;
};
#endif // nsHtml5TreeOperation_h