A simple plugin to open the IDA Hex-Rays decompiler output to the right of all remaining tabs in a split view automatically.

idasplit.py

import idaapi
import ida_hexrays

def runonce(function):
    function._first_run = True
    def wrapper(*args, **kwargs):
        if function._first_run:
            function._first_run = False
            return function(*args, **kwargs)
    return wrapper

def position_pseudocode():
    idaapi.set_dock_pos('Pseudocode-A', None, idaapi.DP_RIGHT)
    idaapi.set_dock_pos('Graph overview', 'Output window', idaapi.DP_TAB)
    idaapi.set_dock_pos('Functions window', 'Output window', idaapi.DP_TAB)

class PseudoCodeTabRight(idaapi.plugin_t):
    flags = idaapi.PLUGIN_HIDE
    comment = 'Opens the PseudoCode tab in a spearate pane to the right.'
    help = 'The plugin triggers automatically when the decompiler is engaged for the first time.'
    wanted_name = 'PseudoCodeTabRight'
    wanted_hotkey = ''

    def init(self):
        def hexrays_event_callback(event, *args):
            if event == idaapi.hxe_open_pseudocode:
                position_pseudocode()
            return 0

        if not idaapi.install_hexrays_callback(hexrays_event_callback):
            return idaapi.PLUGIN_SKIP

        return idaapi.PLUGIN_KEEP

    def run(self, arg=0):
        pass

    def term(self):
        pass

def PLUGIN_ENTRY():
    return PseudoCodeTabRight()