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comparison: parser/htmlparser/public/nsIContentSink.h
parser/htmlparser/public/nsIContentSink.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 #ifndef nsIContentSink_h___ | |
| 6 #define nsIContentSink_h___ | |
| 7 | |
| 8 /** | |
| 9 * MODULE NOTES: | |
| 10 * @update gess 4/1/98 | |
| 11 * | |
| 12 * This pure virtual interface is used as the "glue" that connects the parsing | |
| 13 * process to the content model construction process. | |
| 14 * | |
| 15 * The icontentsink interface is a very lightweight wrapper that represents the | |
| 16 * content-sink model building process. There is another one that you may care | |
| 17 * about more, which is the IHTMLContentSink interface. (See that file for details). | |
| 18 */ | |
| 19 #include "nsISupports.h" | |
| 20 #include "nsString.h" | |
| 21 #include "mozFlushType.h" | |
| 22 #include "nsIDTD.h" | |
| 23 | |
| 24 class nsParserBase; | |
| 25 | |
| 26 #define NS_ICONTENT_SINK_IID \ | |
| 27 { 0xcf9a7cbb, 0xfcbc, 0x4e13, \ | |
| 28 { 0x8e, 0xf5, 0x18, 0xef, 0x2d, 0x3d, 0x58, 0x29 } } | |
| 29 | |
| 30 class nsIContentSink : public nsISupports { | |
| 31 public: | |
| 32 | |
| 33 NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICONTENT_SINK_IID) | |
| 34 | |
| 35 /** | |
| 36 * This method is called by the parser when it is entered from | |
| 37 * the event loop. The content sink wants to know how long the | |
| 38 * parser has been active since we last processed events on the | |
| 39 * main event loop and this call calibrates that measurement. | |
| 40 */ | |
| 41 NS_IMETHOD WillParse(void)=0; | |
| 42 | |
| 43 /** | |
| 44 * This method gets called when the parser begins the process | |
| 45 * of building the content model via the content sink. | |
| 46 * | |
| 47 * Default implementation provided since the sink should have the option of | |
| 48 * doing nothing in response to this call. | |
| 49 * | |
| 50 * @update 5/7/98 gess | |
| 51 */ | |
| 52 NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) { | |
| 53 return NS_OK; | |
| 54 } | |
| 55 | |
| 56 /** | |
| 57 * This method gets called when the parser concludes the process | |
| 58 * of building the content model via the content sink. | |
| 59 * | |
| 60 * Default implementation provided since the sink should have the option of | |
| 61 * doing nothing in response to this call. | |
| 62 * | |
| 63 * @update 5/7/98 gess | |
| 64 */ | |
| 65 NS_IMETHOD DidBuildModel(bool aTerminated) { | |
| 66 return NS_OK; | |
| 67 } | |
| 68 | |
| 69 /** | |
| 70 * This method gets called when the parser gets i/o blocked, | |
| 71 * and wants to notify the sink that it may be a while before | |
| 72 * more data is available. | |
| 73 * | |
| 74 * @update 5/7/98 gess | |
| 75 */ | |
| 76 NS_IMETHOD WillInterrupt(void)=0; | |
| 77 | |
| 78 /** | |
| 79 * This method gets called when the parser i/o gets unblocked, | |
| 80 * and we're about to start dumping content again to the sink. | |
| 81 * | |
| 82 * @update 5/7/98 gess | |
| 83 */ | |
| 84 NS_IMETHOD WillResume(void)=0; | |
| 85 | |
| 86 /** | |
| 87 * This method gets called by the parser so that the content | |
| 88 * sink can retain a reference to the parser. The expectation | |
| 89 * is that the content sink will drop the reference when it | |
| 90 * gets the DidBuildModel notification i.e. when parsing is done. | |
| 91 */ | |
| 92 NS_IMETHOD SetParser(nsParserBase* aParser)=0; | |
| 93 | |
| 94 /** | |
| 95 * Flush content so that the content model is in sync with the state | |
| 96 * of the sink. | |
| 97 * | |
| 98 * @param aType the type of flush to perform | |
| 99 */ | |
| 100 virtual void FlushPendingNotifications(mozFlushType aType)=0; | |
| 101 | |
| 102 /** | |
| 103 * Set the document character set. This should be passed on to the | |
| 104 * document itself. | |
| 105 */ | |
| 106 NS_IMETHOD SetDocumentCharset(nsACString& aCharset)=0; | |
| 107 | |
| 108 /** | |
| 109 * Returns the target object (often a document object) into which | |
| 110 * the content built by this content sink is being added, if any | |
| 111 * (IOW, may return null). | |
| 112 */ | |
| 113 virtual nsISupports *GetTarget()=0; | |
| 114 | |
| 115 /** | |
| 116 * Returns true if there's currently script executing that we need to hold | |
| 117 * parsing for. | |
| 118 */ | |
| 119 virtual bool IsScriptExecuting() | |
| 120 { | |
| 121 return false; | |
| 122 } | |
| 123 | |
| 124 /** | |
| 125 * Posts a runnable that continues parsing. | |
| 126 */ | |
| 127 virtual void ContinueInterruptedParsingAsync() {} | |
| 128 }; | |
| 129 | |
| 130 NS_DEFINE_STATIC_IID_ACCESSOR(nsIContentSink, NS_ICONTENT_SINK_IID) | |
| 131 | |
| 132 #endif /* nsIContentSink_h___ */ |
