Python / Lua Script: Detect if a modifier is pressed when running a script



  • exStyle = exStyle & (~WS_EX_LAYOUTRTL)

    I’m testing it.

    Thank you.



  • Could you do me a favor and run the following script

    WNDENUMPROC = WINFUNCTYPE(wintypes.BOOL,
                              wintypes.HWND,
                              wintypes.LPARAM)
    
    
    python_script_hwnd = None
    python_script_sci_handle = None
    
    GWL_EXSTYLE = -20
    WS_EX_LAYOUTRTL = 0x00400000
    
    def EnumCallback(hwnd, lparam):
        global python_script_hwnd
        global python_script_sci_handle
        
        curr_class = (wintypes.WCHAR * 256)()
        curr_name = (wintypes.WCHAR * 256)()
       
        windll.user32.GetClassNameW(hwnd, curr_class, 256)
        windll.user32.GetWindowTextW(hwnd, curr_name, 256)
        console.write('name:{}\n'.format(curr_name.value.lower()))
        console.write('class:{}\n'.format(curr_class.value.lower()))
        if curr_name.value.lower() == 'python script':
            python_script_hwnd = hwnd
        else:
            if python_script_hwnd is not None:
                if curr_class.value.lower() == 'scintilla':
                    if windll.user32.GetParent(hwnd) == python_script_hwnd:
                        python_script_sci_handle = hwnd
                        return False
           
        return True
    
    parent = windll.user32.FindWindowA('Notepad++', None)
    console.write('parent:{}\n'.format(parent))
    windll.user32.EnumChildWindows(parent, WNDENUMPROC(EnumCallback), 0)
    console.write('{}\n'.format('-'*20))
    console.write('python_script_hwnd:{}\n'.format(python_script_hwnd))
    windll.user32.EnumChildWindows(python_script_hwnd, WNDENUMPROC(EnumCallback), 0)
    
    exStyle = windll.user32.GetWindowLongA(python_script_sci_handle, GWL_EXSTYLE) # GWL_EXSTYLE
    console.write('exStyle:{}\n'.format(exStyle))
    
    if (exStyle & WS_EX_LAYOUTRTL):
        console.write('exStyle & WS_EX_LAYOUTRTL:{}\n'.format(exStyle & WS_EX_LAYOUTRTL))
        exStyle = exStyle & WS_EX_LAYOUTRTL
    else:
        console.write('exStyle | WS_EX_LAYOUTRTL:{}\n'.format(exStyle | WS_EX_LAYOUTRTL))
        exStyle = exStyle | WS_EX_LAYOUTRTL
    windll.user32.SetWindowLongA(python_script_sci_handle, GWL_EXSTYLE, exStyle);
    console.write('test\n')
    

    and please post the output

    Cheers
    Claudia



  • Maybe XOR
    exStyle = exStyle ^ WS_EX_LAYOUTRTL



  • parent:11404816
    name:selected tab
    class:#32770
    name:caption
    class:button
    name:
    class:static
    name:python script
    class:#32770
    name:parent:11404816
    name:selected tab
    class:#32770
    name:caption
    class:button
    name:
    class:static
    name:python script
    class:#32770
    
    class:scintilla
    --------------------
    python_script_hwnd:4392424
    name:parent:11404816
    name:selected tab
    class:#32770
    name:caption
    class:button
    name:
    class:static
    name:python script
    class:#32770
    name:parent:11404816
    name:selected tab
    class:#32770
    name:caption
    class:button
    name:
    class:static
    name:python script
    class:#32770
    
    c
    class:scintilla
    exStyle:4194304
    exStyle & WS_EX_LAYOUTRTL:4194304
    test
    

    Both exStyle = exStyle & (~WS_EX_LAYOUTRTL) and exStyle = exStyle ^ WS_EX_LAYOUTRTL do change the the layout.

    I have to clear the output first. Otherwise it’s gibberish.

    Thank you.



  • Yaron,

    this seems to be my waterloo in terms of understanding bitwise operations.
    I always confuse when to use OR and when XOR.

    So, just to clarify, this works?

    if (exStyle & WS_EX_LAYOUTRTL):
        console.write('exStyle & WS_EX_LAYOUTRTL: {}\n'.format('exStyle & WS_EX_LAYOUTRTL'))
        exStyle = exStyle ^ WS_EX_LAYOUTRTL
    else:
        console.write('exStyle | WS_EX_LAYOUTRTL:{}\n'.format(exStyle | WS_EX_LAYOUTRTL))
        exStyle = exStyle | WS_EX_LAYOUTRTL
    windll.user32.SetWindowLongA(python_script_sci_handle, GWL_EXSTYLE, exStyle);
    console.write('test\n')
    

    Cheers
    Claudia



  • and there seem to be a trap. The console changes it output only if something is
    written to the output. So the initial state will be RTL until something gets written.

    Cheers
    Claudia



  • So, just to clarify, this works?

    Yes, it does.

    and there seem to be a trap. The console changes it output only if something is
    written to the output. So the initial state will be RTL until something gets written.

    If I put the code in startup.py it doesn’t work even after writing to the console.

    Thanks again. :)



  • Strange - works for me.
    Could it be that you already have some ctypes based code in startup.py?
    Variable overwriting?
    May you share your startup.py?
    Or maybe comment everything except the LTR code if you have already ctypes code.

    Cheers
    Claudia



  • Claudia,

    Strange - works for me.

    Do you mean the output is RTL when you open the console?

    I’ve removed my other code for testing it.

    Actually I don’t need it on startup. I can write a “Show Console” script.

    Thank you.



  • Do you mean the output is RTL when you open the console?

    yes, on my side it is.

    When I run a second time from my test script it doesn’t change until
    another write statement happens, then it is back to LTR.

    Cheers
    Claudia



  • Interesting.

    May you share your startup.py?

    I missed that. Sorry.

    # The lines up to and including sys.stderr should always come first
    # Then any errors that occur later get reported to the console
    # If you'd prefer to report errors to a file, you can do that instead here.
    import sys
    from Npp import *
    
    # Set the stderr to the normal console as early as possible, in case of early errors
    sys.stderr = console
    
    # Define a class for writing to the console in red
    class ConsoleError:
    	def __init__(self):
    		global console
    		self._console = console;
    
    	def write(self, text):
    		self._console.writeError(text);
    
    # Set the stderr to write errors in red
    sys.stderr = ConsoleError()
    
    # This imports the "normal" functions, including "help"
    import site
    
    # This sets the stdout to be the currently active document, so print "hello world",
    # will insert "hello world" at the current cursor position of the current document
    sys.stdout = editor
    
    ##################################################
    
    
    from ctypes import windll, byref, wintypes, WINFUNCTYPE, Structure, sizeof
    
    WNDENUMPROC = WINFUNCTYPE(wintypes.BOOL,
                              wintypes.HWND,
                              wintypes.LPARAM)
    
    
    python_script_hwnd = None
    python_script_sci_handle = None
    
    GWL_EXSTYLE = -20
    WS_EX_LAYOUTRTL = 0x00400000
    
    def EnumCallback(hwnd, lparam):
        global python_script_hwnd
        global python_script_sci_handle
        
        curr_class = (wintypes.WCHAR * 256)()
        curr_name = (wintypes.WCHAR * 256)()
       
        windll.user32.GetClassNameW(hwnd, curr_class, 256)
        windll.user32.GetWindowTextW(hwnd, curr_name, 256)
    
        if curr_name.value.lower() == 'python script':
            python_script_hwnd = hwnd
        else:
            if python_script_hwnd is not None:
                if curr_class.value.lower() == 'scintilla':
                    if windll.user32.GetParent(hwnd) == python_script_hwnd:
                        python_script_sci_handle = hwnd
                        return False
           
        return True
    
    parent = windll.user32.FindWindowA('Notepad++', None)
    windll.user32.EnumChildWindows(parent, WNDENUMPROC(EnumCallback), 0)
    windll.user32.EnumChildWindows(python_script_hwnd, WNDENUMPROC(EnumCallback), 0)
    
    exStyle = windll.user32.GetWindowLongA(python_script_sci_handle, GWL_EXSTYLE)
    
    if (exStyle & WS_EX_LAYOUTRTL):
        console.write('exStyle & WS_EX_LAYOUTRTL: {}\n'.format('exStyle & WS_EX_LAYOUTRTL'))
        exStyle = exStyle ^ WS_EX_LAYOUTRTL
    else:
        console.write('exStyle | WS_EX_LAYOUTRTL:{}\n'.format(exStyle | WS_EX_LAYOUTRTL))
        exStyle = exStyle | WS_EX_LAYOUTRTL
    windll.user32.SetWindowLongA(python_script_sci_handle, GWL_EXSTYLE, exStyle);
    console.write('test\n')
    

    Thank you.



  • When I run a second time from my test script it doesn’t change until
    another write statement happens, then it is back to LTR.

    On my machine it changes immediately. It’s gibberish until writing again.

    Thanks.



  • Yaron,

    strange - might be linux/windows related.
    I’ve copied your startup.py - cleaned mine (commented everything)
    and now I have your behavior. Phew …

    Yaron, it is already half past 4 here and I have to go to late shift today.
    Need to have some sleep ;-) I will follow up on this in ~16 hours.
    Maybe earlier if we don’t have to do much at work and I can have look.

    Good night.
    Cheers
    Claudia



  • Claudia,

    Thank you very much. You are great!

    default

    Sorry for keeping you up so late.
    Sleep well and have a nice day. :)



  • Thank you :-D

    Did some last test - looks like it a
    console.show()
    before the code
    and if you wish
    console.hide()
    afterwards does the trick.

    Good night.

    Cheers
    Claudia



  • Very nice.

    Thanks again. Highly appreciated.

    Good night. :)



  • Yaron,

    did try to understand what the difference could be but …
    While investigating the python script code I assume I found what needs to be changed in
    order to force a LTR layout.

    The file StaticDialog.cpp has a function makeRTLResource.
    Within the function there is this if condition

    if (pMyDlgTemplateEx->signature == 0xFFFF)
    	pMyDlgTemplateEx->exStyle |= WS_EX_LAYOUTRTL;
    else
    	(*ppMyDlgTemplate)->dwExtendedStyle |= WS_EX_LAYOUTRTL;
    

    what about giving a try to use

    if (pMyDlgTemplateEx->signature == 0xFFFF)
    	pMyDlgTemplateEx->exStyle;
    else
    	(*ppMyDlgTemplate)->dwExtendedStyle;
    

    Yaron, sorry, I would love to see why our machines behave differently but without a debugging environment it’s hard to track down the issue maybe this little code change is a better alternative.

    Cheers
    Claudia



  • Hello Claudia,

    did try to understand what the difference could be but …

    I would love to see why our machines behave differently but without a debugging environment it’s hard to track down the issue…

    I apologize for not being clear enough in my last post.
    In “Very nice” I meant to confirm the issue was solved by adding console.show(). :)

    The file StaticDialog.cpp has a function makeRTLResource.
    Within the function there is this if condition

    Thank you very much for that too.
    A couple of years ago Dave uploaded a PythonScript v1.1.1 without committing the changes.
    As your script works perfectly, I’d rather keep using v1.1.1.

    Many thanks again for your kind help. I do appreciate it.

    Best regards.


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