Plug-in Basics
- How Plug-ins Are Used
- How Plug-ins Work
- Understanding the Runtime Model
- Plug-in Detection
- Overview of Plug-in Structure
- Windowed and Windowless Plug-ins
- The Default Plug-in
- Using HTML to Display Plug-ins
- Plug-in References
Plug-in Development Overview
- Writing Plug-ins
- Registering Plug-ins
- Drawing a Plug-in Instance
- Handling Memory
- Sending and Receiving Streams
- Working with URLs
- Getting Version and UI Information
- Displaying Messages on the Status Line
- Making Plug-ins Scriptable
- Building Plug-ins
- Installing Plug-ins
- Plug-in Installation and the Windows Registry
Initialization and Destruction
Drawing and Event Handling
Streams
- Receiving a Stream
- Telling the Plug-in When a Stream Is Created
- Telling the Plug-in When a Stream Is Deleted
- Finding Out How Much Data the Plug-in Can Accept
- Writing the Stream to the Plug-in
- Sending the Stream in Random-Access Mode
- Sending the Stream in File Mode
- Sending a Stream
- Creating a Stream
- Pushing Data into the Stream
- Deleting the Stream
- Example of Sending a Stream
URLs
Memory
Version, UI, and Status Information
- Displaying a Status Line Message
- Getting Agent Information
- Getting the Current Version
- Finding Out if a Feature Exists
- Reloading a Plug-in
Plug-in Side Plug-in API
This chapter describes methods in the plug-in API that are available from the plug-in object. The names of all of these methods begin with NPP_ to indicate that they are implemented by the plug-in and called by the browser. For an overview of how these two sides of the plug-in API interact, see the How Plug-ins Work and Overview of Plug-in Structure sections in the introduction.
NPP_DestroyNPP_DestroyStreamNPP_GetValueNP_GetValueNPP_HandleEventNP_InitializeNPP_NewNPP_NewStreamNPP_PrintNPP_SetValueNPP_SetWindowNP_ShutdownNPP_StreamAsFileNPP_URLNotifyNPP_WriteNPP_WriteReady
Browser Side Plug-in API
This chapter describes methods in the plug-in API that are available from the browser. The names of all of these methods begin with NPN_ to indicate that they are implemented by the browser and called by the plug-in. For an overview of how these two sides of the plug-in API interact, see the How Plug-ins Work and Overview of Plug-in Structure sections in the introduction.
Warning: You must only call these from the main thread; calling them from other threads is not supported and may have unpredictable results.
NPN_DestroyStream- Closes and deletes a stream.
NPN_ForceRedraw- Forces a paint message for a windowless plug-in.
NPN_GetAuthenticationInfo- This function is called by plug-ins to get HTTP authentication information from the browser.
NPN_GetURL- Asks the browser to create a stream for the specified URL.
NPN_GetURLNotify- Requests creation of a new stream with the contents of the specified URL; gets notification of the result.
NPN_GetValue- Allows the plug-in to query the browser for information.
NPN_GetValueForURL- Provides information to a plug-in which is associated with a given URL, for example the cookies or preferred proxy.
NPN_InvalidateRect- Invalidates specified drawing area prior to repainting or refreshing a windowless plug-in.
NPN_InvalidateRegion- Invalidates specified drawing region prior to repainting or refreshing a windowless plug-in.
NPN_MemAlloc- Allocates memory from the browser's memory space.
NPN_MemFlush- Requests that the browser free a specified amount of memory.
NPN_MemFree- Deallocates a block of allocated memory.
NPN_NewStream- Requests the creation of a new data stream produced by the plug-in and consumed by the browser.
NPN_PluginThreadAsyncCall- Thread-safe way to request that the browser calls a plug-in function on the browser or plug-in thread (the thread on which the plug-in was initiated).
NPN_PopPopupsEnabledState- Pops the popups-enabled state.
NPN_PostURL- Posts data to a URL.
NPN_PostURLNotify- Posts data to a URL, and receives notification of the result.
NPN_PushPopupsEnabledState- Pushes the popups-enabled state.
NPN_ReloadPlugins- Reloads all plug-ins in the Plugins directory.
NPN_RequestRead- Requests a range of bytes for a seekable stream.
NPN_SetValue- Sets windowless plug-in as transparent or opaque.
NPN_SetValueForURL- Allows a plug-in to change the stored information associated with a URL, in particular its cookies.
NPN_Status- Displays a message on the status line of the browser window.
NPN_UserAgent- Returns the browser's user agent field.
NPN_Version- Returns version information for the Plug-in API.
NPN_Write- Pushes data into a stream produced by the plug-in and consumed by the browser.
Scripting plugins
- How the DOM handles scripting
- Threading model
- Security model
- What's in the plugin code?
- Accessing browser objects from a plugin
- How to call plugin native methods
- The API extensions
Structures
NPAnyCallbackStructNPByteRangeNPEmbedPrintNPEventNPFullPrintNPPNP_PortNPPrintNPPrintCallbackStructNPRectNPRegionNPSavedDataNPSetWindowCallbackStructNPStreamNPWindow
Constants
External resources
Original document information
- Copyright Information: Netscape Communication
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