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/* -*- Mode: C++; tab-width: 4; 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/. */
#ifndef TRANSFRMX_TXSTYLESHEETCOMPILER_H
#define TRANSFRMX_TXSTYLESHEETCOMPILER_H
#include "mozilla/Attributes.h"
#include "mozilla/UniquePtr.h"
#include "txStack.h"
#include "txXSLTPatterns.h"
#include "txExpr.h"
#include "txIXPathContext.h"
#include "txStylesheet.h"
#include "nsTArray.h"
extern bool TX_XSLTFunctionAvailable(nsAtom* aName, int32_t aNameSpaceID);
class txHandlerTable;
class txElementContext;
class txInstructionContainer;
class txInstruction;
class txNamespaceMap;
class txToplevelItem;
class txPushNewContext;
class txStylesheetCompiler;
class txElementContext : public txObject {
public:
explicit txElementContext(const nsAString& aBaseURI);
txElementContext(const txElementContext& aOther);
bool mPreserveWhitespace;
bool mForwardsCompatibleParsing;
nsString mBaseURI;
RefPtr<txNamespaceMap> mMappings;
nsTArray<int32_t> mInstructionNamespaces;
int32_t mDepth;
};
using mozilla::dom::ReferrerPolicy;
class txACompileObserver {
public:
NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
virtual nsresult loadURI(const nsAString& aUri, const nsAString& aReferrerUri,
ReferrerPolicy aReferrerPolicy,
txStylesheetCompiler* aCompiler) = 0;
virtual void onDoneCompiling(txStylesheetCompiler* aCompiler,
nsresult aResult,
const char16_t* aErrorText = nullptr,
const char16_t* aParam = nullptr) = 0;
};
#define TX_DECL_ACOMPILEOBSERVER \
nsresult loadURI(const nsAString& aUri, const nsAString& aReferrerUri, \
ReferrerPolicy aReferrerPolicy, \
txStylesheetCompiler* aCompiler) override; \
void onDoneCompiling(txStylesheetCompiler* aCompiler, nsresult aResult, \
const char16_t* aErrorText = nullptr, \
const char16_t* aParam = nullptr) override;
class txInScopeVariable {
public:
explicit txInScopeVariable(const txExpandedName& aName)
: mName(aName), mLevel(1) {}
txExpandedName mName;
int32_t mLevel;
};
class txStylesheetCompilerState : public txIParseContext {
public:
explicit txStylesheetCompilerState(txACompileObserver* aObserver);
~txStylesheetCompilerState();
nsresult init(const nsAString& aStylesheetURI, ReferrerPolicy aReferrerPolicy,
txStylesheet* aStylesheet, txListIterator* aInsertPosition);
// Embedded stylesheets state
bool handleEmbeddedSheet() { return mEmbedStatus == eInEmbed; }
void doneEmbedding() { mEmbedStatus = eHasEmbed; }
// Stack functions
enum enumStackType {
eElementHandler,
eHandlerTable,
eVariableItem,
eCopy,
eInstruction,
ePushNewContext,
eConditionalGoto,
eCheckParam,
ePushNullTemplateRule
};
void pushHandlerTable(txHandlerTable* aTable);
void popHandlerTable();
void pushSorter(txPushNewContext* aSorter);
void popSorter();
void pushChooseGotoList();
void popChooseGotoList();
void pushObject(txObject* aObject);
txObject* popObject();
void pushPtr(void* aPtr, enumStackType aType);
void* popPtr(enumStackType aType);
// stylesheet functions
void addToplevelItem(txToplevelItem* aItem);
nsresult openInstructionContainer(txInstructionContainer* aContainer);
void closeInstructionContainer();
txInstruction* addInstruction(
mozilla::UniquePtr<txInstruction>&& aInstruction);
template <class T>
T* addInstruction(mozilla::UniquePtr<T> aInstruction) {
return static_cast<T*>(addInstruction(
mozilla::UniquePtr<txInstruction>(std::move(aInstruction))));
}
nsresult loadIncludedStylesheet(const nsAString& aURI);
nsresult loadImportedStylesheet(const nsAString& aURI,
txStylesheet::ImportFrame* aFrame);
// misc
void addGotoTarget(txInstruction** aTargetPointer);
void addVariable(const txExpandedName& aName);
// txIParseContext
nsresult resolveNamespacePrefix(nsAtom* aPrefix, int32_t& aID) override;
nsresult resolveFunctionCall(nsAtom* aName, int32_t aID,
FunctionCall** aFunction) override;
bool caseInsensitiveNameTests() override;
/**
* Should the stylesheet be parsed in forwards compatible parsing mode.
*/
bool fcp() { return mElementContext->mForwardsCompatibleParsing; }
void SetErrorOffset(uint32_t aOffset) override;
bool allowed(Allowed aAllowed) override { return !(mDisAllowed & aAllowed); }
bool ignoreError(nsresult aResult) {
// Some errors shouldn't be ignored even in forwards compatible parsing
// mode.
return aResult != NS_ERROR_XSLT_CALL_TO_KEY_NOT_ALLOWED && fcp();
}
RefPtr<txStylesheet> mStylesheet;
txHandlerTable* mHandlerTable;
mozilla::UniquePtr<txElementContext> mElementContext;
txPushNewContext* mSorter;
mozilla::UniquePtr<txList> mChooseGotoList;
bool mDOE;
bool mSearchingForFallback;
uint16_t mDisAllowed;
protected:
RefPtr<txACompileObserver> mObserver;
nsTArray<txInScopeVariable> mInScopeVariables;
nsTArray<txStylesheetCompiler*> mChildCompilerList;
// embed info, target information is the ID
nsString mTarget;
enum { eNoEmbed, eNeedEmbed, eInEmbed, eHasEmbed } mEmbedStatus;
nsString mStylesheetURI;
bool mIsTopCompiler;
bool mDoneWithThisStylesheet;
txStack mObjectStack;
txStack mOtherStack;
nsTArray<enumStackType> mTypeStack;
private:
mozilla::UniquePtr<txInstruction>* mNextInstrPtr;
txListIterator mToplevelIterator;
nsTArray<txInstruction**> mGotoTargetPointers;
ReferrerPolicy mReferrerPolicy;
};
struct txStylesheetAttr {
int32_t mNamespaceID;
RefPtr<nsAtom> mLocalName;
RefPtr<nsAtom> mPrefix;
nsString mValue;
};
class txStylesheetCompiler final : private txStylesheetCompilerState,
public txACompileObserver {
public:
friend class txStylesheetCompilerState;
friend bool TX_XSLTFunctionAvailable(nsAtom* aName, int32_t aNameSpaceID);
txStylesheetCompiler(const nsAString& aStylesheetURI,
ReferrerPolicy aReferrerPolicy,
txACompileObserver* aObserver);
txStylesheetCompiler(const nsAString& aStylesheetURI,
txStylesheet* aStylesheet,
txListIterator* aInsertPosition,
ReferrerPolicy aReferrerPolicy,
txACompileObserver* aObserver);
void setBaseURI(const nsString& aBaseURI);
nsresult startElement(int32_t aNamespaceID, nsAtom* aLocalName,
nsAtom* aPrefix, txStylesheetAttr* aAttributes,
int32_t aAttrCount);
nsresult startElement(const char16_t* aName, const char16_t** aAtts,
int32_t aAttrCount);
nsresult endElement();
nsresult characters(const nsAString& aStr);
nsresult doneLoading();
void cancel(nsresult aError, const char16_t* aErrorText = nullptr,
const char16_t* aParam = nullptr);
txStylesheet* getStylesheet();
TX_DECL_ACOMPILEOBSERVER
NS_INLINE_DECL_REFCOUNTING(txStylesheetCompiler, override)
private:
// Private destructor, to discourage deletion outside of Release():
~txStylesheetCompiler() = default;
nsresult startElementInternal(int32_t aNamespaceID, nsAtom* aLocalName,
nsAtom* aPrefix, txStylesheetAttr* aAttributes,
int32_t aAttrCount);
nsresult flushCharacters();
nsresult ensureNewElementContext();
nsresult maybeDoneCompiling();
nsString mCharacters;
nsresult mStatus;
};
#endif
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