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/* -*- Mode: C++; tab-width: 2; 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 nsIContentSink_h___
#define nsIContentSink_h___
/**
* MODULE NOTES:
* @update gess 4/1/98
*
* This pure virtual interface is used as the "glue" that connects the parsing
* process to the content model construction process.
*
* The icontentsink interface is a very lightweight wrapper that represents the
* content-sink model building process. There is another one that you may care
* about more, which is the IHTMLContentSink interface. (See that file for
* details).
*/
#include "nsISupports.h"
#include "nsString.h"
#include "mozilla/FlushType.h"
#include "mozilla/NotNull.h"
#include "nsIDTD.h"
class nsParserBase;
namespace mozilla {
class Encoding;
}
#define NS_ICONTENT_SINK_IID \
{ \
0xcf9a7cbb, 0xfcbc, 0x4e13, { \
0x8e, 0xf5, 0x18, 0xef, 0x2d, 0x3d, 0x58, 0x29 \
} \
}
class nsIContentSink : public nsISupports {
protected:
using Encoding = mozilla::Encoding;
template <typename T>
using NotNull = mozilla::NotNull<T>;
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICONTENT_SINK_IID)
/**
* This method is called by the parser when it is entered from
* the event loop. The content sink wants to know how long the
* parser has been active since we last processed events on the
* main event loop and this call calibrates that measurement.
*/
NS_IMETHOD WillParse(void) = 0;
/**
* This method gets called when the parser begins the process
* of building the content model via the content sink.
*
* Default implementation provided since the sink should have the option of
* doing nothing in response to this call.
*
* @update 5/7/98 gess
*/
NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) { return NS_OK; }
/**
* This method gets called when the parser concludes the process
* of building the content model via the content sink.
*
* Default implementation provided since the sink should have the option of
* doing nothing in response to this call.
*
* @update 5/7/98 gess
*/
NS_IMETHOD DidBuildModel(bool aTerminated) { return NS_OK; }
/**
* This method gets called when the parser gets i/o blocked,
* and wants to notify the sink that it may be a while before
* more data is available.
*
* @update 5/7/98 gess
*/
NS_IMETHOD WillInterrupt(void) = 0;
/**
* This method gets called when the parser i/o gets unblocked,
* and we're about to start dumping content again to the sink.
*/
virtual void WillResume() = 0;
/**
* This method returns nullptr unless `this` can
* be cast as nsHtml5TreeOpExecutor.
*/
virtual nsIContentSink* AsExecutor() { return nullptr; }
/**
* This method gets called by the parser so that the content
* sink can retain a reference to the parser. The expectation
* is that the content sink will drop the reference when it
* gets the DidBuildModel notification i.e. when parsing is done.
*/
NS_IMETHOD SetParser(nsParserBase* aParser) = 0;
/**
* Flush content so that the content model is in sync with the state
* of the sink.
*
* @param aType the type of flush to perform
*/
virtual void FlushPendingNotifications(mozilla::FlushType aType) = 0;
/**
* Set the document character set. This should be passed on to the
* document itself.
*/
virtual void SetDocumentCharset(NotNull<const Encoding*> aEncoding) = 0;
/**
* Returns the target object (often a document object) into which
* the content built by this content sink is being added, if any
* (IOW, may return null).
*/
virtual nsISupports* GetTarget() = 0;
/**
* Returns true if there's currently script executing that we need to hold
* parsing for.
*/
virtual bool IsScriptExecuting() { return false; }
/**
* Posts a runnable that continues parsing.
*/
virtual void ContinueInterruptedParsingAsync() {}
virtual void InitialTranslationCompleted() {}
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIContentSink, NS_ICONTENT_SINK_IID)
#endif /* nsIContentSink_h___ */
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