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authorBerke Viktor <bviktor@hexchat.org>2012-10-28 10:49:44 +0100
committerBerke Viktor <bviktor@hexchat.org>2012-10-28 10:49:44 +0100
commit6a9e7bb4d349b419816891e85ae8e95c46b9d2f5 (patch)
tree8ed4ee10b38b9c1032577183b910d53a37290cb1 /plugins/python
parentfe6bda343b10909d9f5b6a3e1ac4b232f1875411 (diff)
Further doc relocations and conversions
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-% HexChat Python Interface
-
-Features
---------
-
-Here are some of the features of the python plugin interface:
-
--   Comprehensive, consistent and straightforward API
--   Load, unload, reload, and autoload support
--   Per plugin independent interpreter state
--   Python interactive console
--   Python interactive command execution
--   Full thread support
--   Stdout and stderr redirected to xchat console
--   Dynamic list management
--   Nice context treatment
--   Plugin preferences
-
-Commands
---------
-
-The following commands will be intercepted by the Python Plugin interface module, when it is loaded.
-
----------------------------------------------------------------------------------------------------------------------------------------------
-*Command*                           *Description*
-----------------------------------  ---------------------------------------------------------------------------------------------------------
-/py load <filename>                 Load module with given filename.
-
-/py unload <filename|module name>   Unload module with given filename, or module name.
-
-/py reload <filename|module name>   Reload module with given filename, or module name.
-
-/py list                            List Python modules loaded.
-
-/py exec <command>                  Execute given Python command interactively. For example:
-                                            `/py exec import xchat`
-                                            `/py exec print xchat.get_info('channel')`
-
-/py console                         Open the Python interactive console in a query (>>python<<).
-                                        Every message sent will be intercepted by the Python plugin interface, and interpreted interactively.
-                                        Notice that the console and /py exec commands live in the same interpreter state.
-
-/py about                           Show some information about the Python plugin interface.
-----------------------------------------------------------------------------------------------------------------------------------------------
-
-
-Autoloading modules
--------------------
-
-If you want some module to be autoloaded together with the Python plugin
-interface (which usually loads at startup time), just make sure it has a
-`.py` extension and put it in your HexChat directory (~/.config/hexchat/addons, %APPDATA%\\HexChat\\addons).
-
-Context theory
---------------
-
-Before starting to explain what the API offers, I'll do a short
-introduction about the xchat context concept. Not because it's something
-hard to understand, but because you'll understand better the API
-explanations if you know what I'm talking about.
-
-You can think about a context as an xchat channel, server, or query tab.
-Each of these tabs, has its own context, and is related to a given
-server and channel (queries are a special kind of channel).
-
-The *current* context is the one where xchat passes control to the
-module. For example, when xchat receives a command in a specific
-channel, and you have asked xchat to tell you about this event, the
-current context will be set to this channel before your module is
-called.
-
-Hello world
------------
-
-Here is the traditional *hello world* example.
-
-~~~~~~~~~~ {.python}
-    __module_name__ = "helloworld" 
-    __module_version__ = "1.0" 
-    __module_description__ = "Python module example" 
-     
-    print "Hello world!" 
-~~~~~~~~~~
-
-This module will print "Hello world!" in the xchat console, and sleep
-forever until it's unloaded. It's a simple module, but already
-introduces some concepts. Notice how the module information is set. This
-information is obligatory, and will be shown when listing the loaded
-xchat modules.
-
-xchat module
-------------
-
-The xchat module is your passport to every xchat functionality offered
-by the Python plugin interface. Here's a simple example:
-
-~~~~~~~~~~ {.python}
-    import xchat 
-    xchat.prnt("Hi everyone!")
-~~~~~~~~~~
-
-The following functions are available in the xchat module.
-
-### Generic functions
-
-#### xchat.prnt(string)
-
-This function will print string in the current context. It's mainly
-useful as a parameter to pass to some other function, since the usual
-print statement will have the same results. You have a usage example
-above.
-
-This function is badly
-named because `"print"` is a reserved keyword of the Python language.
-
-#### xchat.emit_print(event_name, *args)
-
-This function will generate a *print event* with the given arguments. To
-check which events are available, and the number and meaning of
-arguments, have a look at the `Settings > Lists > Text Events` window.
-Here is one example:
-
-~~~~~~~~~~ {.python}
-    xchat.emit_print("Channel Message", "John", "Hi there", "@")
-~~~~~~~~~~`
-
-#### xchat.command(string)
-
-Execute the given command in the current context. This has the same
-results as executing a command in the xchat window, but notice that the
-`/` prefix is not used. Here is an example:
-
-~~~~~~~~~~ {.python}
-    xchat.command("server irc.openprojects.net") 
-~~~~~~~~~~
-
-#### xchat.nickcmp(s1, s2)
-
-This function will do an RFC1459 compliant string comparing between `s1`
-and `s2`, and is useful to compare channels and nicknames. It returns an
-integer less than, equal to, or greater than zero if `s1` is found,
-respectively, to be less than, to match, or be greater than `s2`. For
-example:
-
-~~~~~~~~~~ {.python}
-    if xchat.nickcmp(nick, "mynick") == 0: 
-        print "They are the same!" 
-~~~~~~~~~~
-
-### Information retreiving functions
-
-#### xchat.get_info(type)
-
-Retrieve the information specified by the `type` string in the current
-context. At the moment of this writing, the following information types
-are available to be queried:
-
------------------------------------------------------------------------------------------------
-*Type*      *Description*
---------    -----------------------------------------------------------------------------------
-away        Away reason or None if you are not away.
-
-channels    Channel of the current context.
-
-hostname    Real hostname of the server you connected to.
-
-network     Current network name or None.
-
-nick        Your current nick name.
-
-server      Current server name (what the server claims to be) or None if you are not connected.
-
-topic       Current channel topic.
-
-version     hexchat version number.
-
-xchatdir    hexchat config directory e.g.: "~/.config/hexchat".
-------------------------------------------------------------------------------------------------
-
-Example:
-
-~~~~~~~~~~ {.python}
-    if xchat.get_info("server") is None: 
-        xchat.prnt("Not connected!") 
-~~~~~~~~~~
-
-#### xchat.get_prefs(name)
-
-Retrieve the xchat setting information specified by the `name` string,
-as available by the `/set` command. For example:
-
-~~~~~~~~~~ {.python}
-    print "Current preferred nick:", xchat.get_prefs("irc_nick1")
-~~~~~~~~~~
-
-#### xchat.get_list(type)
-
-With this function you may retrieve a list containing the selected
-information from the current context, like a DCC list, a channel list, a
-user list, etc. Each list item will have its attributes set dynamically
-depending on the information provided by the list type.
-
-The example below is a rewrite of the example provided with xchat's
-plugin API documentation. It prints a list of every DCC transfer
-happening at the moment. Notice how similar the interface is to the C
-API provided by xchat.
-
-~~~~~~~~~~ {.python}
-    list = xchat.get_list("dcc") 
-    if list: 
-        print "--- DCC LIST ------------------" 
-        print "File  To/From   KB/s   Position" 
-        for i in list: 
-            print "%6s %10s %.2f  %d" % (i.file, i.nick, i.cps/1024, i.pos) 
-~~~~~~~~~~
-
-Below you will find what each list type has to offer.
-
-This information was
-taken from xchat's plugin documentation. You may find any types not
-listed here, if they exist at all, in an updated xchat documentation.
-Any list types accepted by xchat should be dynamically accepted by the
-Python plugin interface.
-
-##### channels
-
-The channels list type gives you access to the channels, queries and
-their servers. The folloing attributes are available in each list item:
-
--------------------------------------------------------------------
-*Type*      *Description*
--------     -------------------------------------------------------
-channel     Channel or query name.
-
-context     A context object, giving access to that channel/server.
-
-network     Network name to which this channel belongs.
-
-server      Server name to which this channel belongs.
-
-type        Type of context (1=Server, 2=Channel, 3=Dialog).
--------------------------------------------------------------------
-
-##### dcc
-
-The dcc list type gives you access to a list of DCC file transfers. The
-following attributes are available in each list item:
-
----------------------------------------------------------------------------------------
-*Type*      *Description*
----------   ---------------------------------------------------------------------------
-address32   Address of the remote user (ipv4 address, as an int).
-
-cps         Bytes per second (speed).
-
-destfile    Destination full pathname.
-
-file        Filename.
-
-nick        Nickname of person who the file is from/to.
-
-port        TCP port number.
-
-pos         Bytes sent/received.
-
-resume      Point at which this file was resumed (or zero if it was not resumed).
-
-size        File size in bytes.
-
-status      DCC status (queued=0, active=1, failed=2, done=3, connecting=4, aborted=5).
-
-type        DCC type (send=0, receive=1, chatrecv=2, chatsend=3).
----------------------------------------------------------------------------------------
-
-##### users
-
-The users list type gives you access to a list of users in the current
-channel. The following attributes are available in each list item:
-
-----------------------------------------------------------------
-*Type*  *Description*
-------  --------------------------------------------------------
-nick    Nick name.
-
-host    Host name in the form user@host (or None, if not known).
-
-prefix  Prefix character, .e.g: @ or +. Points to a single char.
-----------------------------------------------------------------
-
-##### ignore
-
-The ignore list type gives you access to the current ignored list. The
-following attributes are available in each list item:
-
------------------------------------------------------------------------------------------------------------
-*Type*  *Description*
------   ---------------------------------------------------------------------------------------------------
-mask    Ignore mask (for example, "*!*@*.aol.com").
-
-flags   Bit field of flags (0=private, 1=notice, 2=channel, 3=ctcp, 4=invite, 5=unignore, 6=nosave, 7=dcc).
------------------------------------------------------------------------------------------------------------
-
-### Hook functions
-
-These functions allow one to hook into xchat events.
-
-#### Priorities
-
-When a priority keyword parameter is accepted, it means that this
-callback may be hooked with five different priorities: PRI_HIGHEST,
-PRI_HIGH, PRI_NORM, PRI_LOW, and PRI_LOWEST. The usage of these
-constants, which are available in the xchat module, will define the
-order in which your plugin will be called. Most of the time, you won't
-want to change its default value (PRI_NORM).
-
-#### Parameters word and word_eol
-
-These parameters, when available in a callback, are lists of strings
-which contain the parameters the user entered for the particular
-command. For example, if you executed:
-
-> /command NICK Hi there! 
-
--   **word[0]** is `command`
--   **word[1]** is `NICK`
--   **word[2]** is `Hi`
--   **word[3]** is `there!`
--   **word_eol[0]** is `command NICK Hi there!`
--   **word_eol[1]** is `NICK Hi there!`
--   **word_eol[2]** is `Hi there!`
--   **word_eol[3]** is `there!`
-
-#### Parameter userdata
-
-The parameter userdata, if given, allows you to pass a custom object to
-your callback.
-
-#### Callback return constants (EAT_*)
-
-When a callback is supposed to return one of the EAT_* macros, it is
-able control how xchat will proceed after the callback returns. These
-are the available constants, and their meanings:
-
----------------------------------------------------------
-*Constant*  *Description*
------------ ---------------------------------------------
-EAT_PLUGIN Don't let any other plugin receive this event.
-
-EAT_XCHAT  Don't let xchat treat this event as usual.
-
-EAT_ALL    Eat the event completely.
-
-EAT_NONE   Let everything happen as usual.
----------------------------------------------------------
-
-Returning `None` is the same as returning `EAT_NONE`.
-
-#### xchat.hook_command(name, callback, userdata=None, priority=PRI_NORM, help=None)
-
-This function allows you to hook into the name xchat command. It means
-that everytime you type `/name ...`, `callback` will be called.
-Parameters `userdata` and `priority` have their meanings explained
-above, and the parameter help, if given, allows you to pass a help text
-which will be shown when `/help name` is executed. This function returns
-a hook handler which may be used in the `xchat.unhook()` function. For
-example:
-
-~~~~~~~~~~ {.python}
-    def onotice_cb(word, word_eol, userdata): 
-        if len(word) < 2: 
-            print "Second arg must be the message!" 
-        else: 
-            xchat.command("NOTICE @%s %s" % (xchat.get_info("channel"), word_eol[1])) 
-        return xchat.EAT_ALL 
-     
-    xchat.hook_command("ONOTICE", onotice_cb, help="/ONOTICE <message> Sends a notice to all ops")
-~~~~~~~~~~
-
-You may return one of `EAT_*` constants in the callback, to control
-xchat's behavior, as explained above.
-
-#### xchat.hook_print(name, callback, userdata=None, priority=PRI_NORM)
-
-This function allows you to register a callback to trap any print
-events. The event names are available in the *Edit Event Texts* window.
-Parameters `userdata` and `priority` have their meanings explained
-above. This function returns a hook handler which may be used in the
-`xchat.unhook()` function. For example:
-
-~~~~~~~~~~ {.python}
-    def youpart_cb(word, word_eol, userdata): 
-        print "You have left channel", word[2] 
-        return xchat.EAT_XCHAT # Don't let xchat do its normal printing 
-     
-    xchat.hook_print("You Part", youpart_cb) 
-~~~~~~~~~~
-
-You may return one of `EAT_*` constants in the callback, to control
-xchat's behavior, as explained above.
-
-#### xchat.hook_server(name, callback, userdata=None, priority=PRI_NORM)
-
-This function allows you to register a callback to be called when a
-certain server event occurs. You can use this to trap `PRIVMSG`,
-`NOTICE`, `PART`, a server numeric, etc. Parameters `userdata` and
-`priority` have their meanings explained above. This function returns a
-hook handler which may be used in the `xchat.unhook()` function. For
-example:
-
-~~~~~~~~~~ {.python}
-    def kick_cb(word, word_eol, userdata): 
-        print "%s was kicked from %s (%s)" % (word[3], word[2], word_eol[4]) 
-        # Don't eat this event, let other plugins and xchat see it too 
-        return xchat.EAT_NONE 
-     
-    xchat.hook_server("KICK", kick_cb) 
-~~~~~~~~~~
-
-You may return one of `EAT_*` constants in the callback, to control
-xchat's behavior, as explained above.
-
-#### xchat.hook_timer(timeout, callback, userdata=None)
-
-This function allows you to register a callback to be called every
-timeout milliseconds. Parameters userdata and priority have their
-meanings explained above. This function returns a hook handler which may
-be used in the `xchat.unhook()` function. For example:
-
-~~~~~~~~~~ {.python}
-    myhook = None 
-     
-    def stop_cb(word, word_eol, userdata): 
-        global myhook 
-        if myhook is not None: 
-            xchat.unhook(myhook) 
-            myhook = None 
-            print "Timeout removed!" 
-     
-    def timeout_cb(userdata): 
-        print "Annoying message every 5 seconds! Type /STOP to stop it." 
-        return 1 # Keep the timeout going 
-     
-    myhook = xchat.hook_timer(5000, timeout_cb) 
-    xchat.hook_command("STOP", stop_cb) 
-~~~~~~~~~~
-
-If you return a true value from the callback, the timer will be keeped,
-otherwise it is removed.
-
-#### xchat.hook_unload(timeout, callback, userdata=None)
-
-This function allows you to register a callback to be called when the
-plugin is going to be unloaded. Parameters `userdata` and `priority`
-have their meanings explained above. This function returns a hook
-handler which may be used in the `xchat.unhook()` function. For example:
-
-~~~~~~~~~~ {.python}
-    def unload_cb(userdata): 
-        print "We're being unloaded!" 
-     
-    xchat.hook_unload(unload_cb) 
-~~~~~~~~~~
-
-#### xchat.unhook(handler)
-
-Unhooks any hook registered with the hook functions above.
-
-### Plugin preferences
-
-You can use pluginpref to easily store and retrieve settings. This was added in the Python plugin version 0.9
-
-#### xchat.set_pluginpref(name, value)
-
-If neccessary creates a .conf file in the HexChat config dir named addon_python.conf and stores the value in it. Returns 1 on success 0 on failure.
-
-> Note: Until the plugin uses different a conf file per script it's recommened to use 'PluginName-SettingName' to avoid conflicts.
-
-#### xchat.get_pluginpref(name)
-
-This will return the value of the variable of that name. If there is none by this name it will return `None`. Numbers are always returned as Integers.
-
-#### xchat.del_pluginpref(name)
-
-Deletes specified variable. Returns 1 on success (or never existing), 0 on failure.
-
-#### xchat.list_pluginpref()
-
-Returns a list of all currently set preferences.
-
-### Context handling
-
-Below you will find information about how to work with contexts.
-
-#### Context objects
-
-As explained in the Context theory session above, contexts give access
-to a specific channel/query/server tab of xchat. Every function
-available in the xchat module will be evaluated in the current context,
-which will be specified by xchat itself before passing control to the
-module. Sometimes you may want to work in a specific context, and that's
-where context objects come into play.
-
-You may create a context object using the `xchat.get_context()` or
-`xchat.find_context()`, functions as explained below, or trough the
-`xchat.get_list()` function, as explained in its respective session.
-
-Each context object offers the following methods:
-
--------------------------------------------------------------------------------------------------------------------------
-*Methods*                                   *Description*
-----------------------------------------    -----------------------------------------------------------------------------
-context.set()                               Changes the current context to be the one represented by this context object.
-
-context.prnt(string)                        Does the same as the xchat.prnt() function, but in the given context.
-
-context.emit_print(event_name, *args)       Does the same as the emit_print() function, but in the given context.
-
-context.command(string)                     Does the same as the xchat.command() function, but in the given context.
-
-context.get_info(type)                      Does the same as the xchat.get_info() function, but in the given context.
-
-context.get_list(type)                      Does the same as the xchat.get_list() function, but in the given context.
--------------------------------------------------------------------------------------------------------------------------
-
-#### xchat.get_context()
-
-Returns a context object corresponding the the current context.
-
-#### xchat.find_context(server=None, channel=None)
-
-Finds a context based on a channel and servername. If `server` is
-`None`, it finds any channel (or query) by the given name. If `channel`
-is `None`, it finds the front-most tab/window of the given server. For
-example:
-
-~~~~~~~~~~ {.python}
-    cnc = xchat.find_context(channel='#conectiva') 
-    cnc.command('whois niemeyer') 
-~~~~~~~~~~
-
-* * * * *
-
-Original Author: Gustavo Niemeyer [gustavo@niemeyer.net](mailto:gustavo@niemeyer.net)
-
-For purty html: `pandoc --toc python.md -s --highlight-style haddock -o python.html`