How to change syntax via hotkey ?

PeterJones

Using @Michael-Vincent’s NppConsole/plsh wrapper around my perl library,

@language_keys = sort { $nppm{$a} <=> $nppm{$b} } grep { /^L_/ } keys %nppm;
printf "%s => %s: '%s'\n", $_, $nppm{$_}, notepad->getLanguageDesc($nppm{$_}) for (@language_keys);

gives

L_TEXT => 0: 'Normal text file'
L_PHP  => 1: 'PHP Hypertext Preprocessor file'
L_C => 2: 'C source file'
L_CPP => 3: 'C++ source file'
L_CS => 4: 'C# source file'
L_OBJC => 5: 'Objective-C source file'
L_JAVA => 6: 'Java source file'
L_RC => 7: 'Windows Resource file'
L_HTML => 8: 'Hyper Text Markup Language file'
L_XML => 9: 'eXtensible Markup Language file'
L_MAKEFILE => 10: 'Makefile'
L_PASCAL => 11: 'Pascal source file'
L_BATCH => 12: 'Batch file'
L_INI => 13: 'MS ini file'
L_ASCII => 14: 'MSDOS Style/ASCII Art'
L_USER => 15: 'User Defined language file'
L_ASP => 16: 'Active Server Pages script file'
L_SQL => 17: 'Structured Query Language file'
L_VB => 18: 'Visual Basic file'
L_JS => 19: 'JavaScript file'
L_CSS => 20: 'Cascade Style Sheets File'
L_PERL => 21: 'Perl source file'
L_PYTHON => 22: 'Python file'
L_LUA => 23: 'Lua source File'
L_TEX => 24: 'TeX file'
L_FORTRAN => 25: 'Fortran free form source file'
L_BASH => 26: 'Unix script file'
L_FLASH => 27: 'Flash ActionScript file'
L_NSIS => 28: 'Nullsoft Scriptable Install System script file'
L_TCL => 29: 'Tool Command Language file'
L_LISP => 30: 'List Processing language file'
L_SCHEME => 31: 'Scheme file'
L_ASM => 32: 'Assembly language source file'
L_DIFF => 33: 'Diff file'
L_PROPS => 34: 'Properties file'
L_PS => 35: 'PostScript file'
L_RUBY => 36: 'Ruby file'
L_SMALLTALK => 37: 'Smalltalk file'
L_VHDL => 38: 'VHSIC Hardware Description Language file'
L_KIX => 39: 'KiXtart file'
L_AU3 => 40: 'AutoIt'
L_CAML => 41: 'Categorical Abstract Machine Language'
L_ADA => 42: 'Ada file'
L_VERILOG => 43: 'Verilog file'
L_MATLAB => 44: 'MATrix LABoratory'
L_HASKELL => 45: 'Haskell'
L_INNO => 46: 'Inno Setup script'
L_SEARCHRESULT => 47: 'Internal Search'
L_CMAKE => 48: 'CMake file'
L_YAML => 49: 'YAML Ain't Markup Language'
L_COBOL => 50: 'COmmon Business Oriented Language'
L_GUI4CLI => 51: 'Gui4Cli file'
L_D => 52: 'D programming language'
L_POWERSHELL => 53: 'Windows PowerShell'
L_R => 54: 'R programming language'
L_JSP => 55: 'JavaServer Pages script file'
L_COFFEESCRIPT => 56: 'CoffeeScript file'
L_JSON => 57: 'JSON file'
L_JAVASCRIPT => 58: 'JavaScript file'
L_FORTRAN_77 => 59: 'Fortran fixed form source file'
L_BAANC => 60: 'BaanC File'
L_SREC => 61: 'Motorola S-Record binary data'
L_IHEX => 62: 'Intel HEX binary data'
L_TEHEX => 63: 'Tektronix extended HEX binary data'
L_SWIFT => 64: 'Swift file'
L_ASN1 => 65: 'Abstract Syntax Notation One file'
L_AVS => 66: 'AviSynth scripts files'
L_BLITZBASIC => 67: 'BlitzBasic file'
L_PUREBASIC => 68: 'PureBasic file'
L_FREEBASIC => 69: 'FreeBasic file'
L_CSOUND => 70: 'Csound file'
L_ERLANG => 71: 'Erlang file'
L_ESCRIPT => 72: 'ESCRIPT file'
L_FORTH => 73: 'Forth file'
L_LATEX => 74: 'LaTeX file'
L_MMIXAL => 75: 'MMIXAL file'
L_NIMROD => 76: 'Nimrod file'
L_NNCRONTAB => 77: 'extended crontab file'
L_OSCRIPT => 78: 'OScript source file'
L_REBOL => 79: 'REBOL file'
L_REGISTRY => 80: 'registry file'
L_RUST => 81: 'Rust file'
L_SPICE => 82: 'spice file'
L_TXT2TAGS => 83: 'txt2tags file'
L_VISUALPROLOG => 84: 'Visual Prolog file'
L_EXTERNAL => 85: 'External'

without crashing.
I think there must be a bug in the PythonScript implementation.

PeterJones

… working on bug report now…

https://github.com/bruderstein/PythonScript/issues/146

Ekopalypse

@PeterJones

it seems that this doesn’t create a null-terminated buffer

and if I use some python code like

    length = self.__npp_send(NPPM_GETLANGUAGEDESC, langType, 0)
    lang_desc = ctypes.create_unicode_buffer(length)
    self.__npp_send(NPPM_GETLANGUAGEDESC, langType, ctypes.byref(lang_desc))

I do get the same behavior aka the crash but if I do, what I expect that needs to be done

    length = self.__npp_send(NPPM_GETLANGUAGEDESC, langType, 0)
    lang_desc = ctypes.create_unicode_buffer(length+1)
    self.__npp_send(NPPM_GETLANGUAGEDESC, langType, ctypes.byref(lang_desc))

then it works.

If one is confused about the previous example with create_unicode_buffer,
please note that create_unicode_buffer allocates the buffer differently
depending on the initialization with Int or String.

PeterJones

@PeterJones said

Do notepad.getLanguageName() and notepad.getLanguageDesc() still have the bugs mentioned in your 2019 workaround code?

v1.5.4 was released a couple weeks ago (mid-April), with the fix to the getLanguageDesc() bug. I forgot to reply then.

Thanks, @bruderstein !

Ekopalypse

@PeterJones

I don’t want to diminish the work of @bruderstein,
but I think @chcg did the fix, thanks for that.

PeterJones

@Ekopalypse ,

You are right. Sorry @chcg – no slight intended.

László Bene

Hi, thanks for this easy solution. Unfortunately I need to set up hotkey for Markdown language, which is the only language that doesn’t seem accessible this way. Markdown is in a kind of secondary block in the Language menu, like so:
Markdown from menu
Is there still an ID for Markdown that is missing from the list?

PeterJones

@lászló-bene said in How to change syntax via hotkey ?:

Is there still an ID for Markdown that is missing from the list?

No. Markdown is a UDL (User Defined Language), and they are treated differently than the built-in lexers, since users can manipulate UDLs on-the-fly; so they don’t get constants for notepad.setLangType(LANGTYPE.xxxx).

Thus, as one of @Ekopalypse’s posts above pointed out (after the phrase “and the language script”), it requires different syntax (using notepad.runMenuCommand(...)) to switch the Language to a UDL. So you could just use that script, with putting in Markdown (preinstalled) as the NAME_OF_UDL.

However, Ekopalypse’s script shown above had to work around a limitation in older PythonScript versions. If you have at least PythonScript 1.5.4 or 2.0.0, then you can use a simplified script like I show below. (If you have one of the PythonScript 3.x alpha releases, the ones below should still work, I think; I don’t use PythonScript 3.x yet, and I’m not a Python3 expert, so I forget whether my .format() syntax still works in Python3, but I think it does.)

So, here are some example scripts with PythonScript 1.5.4/2.0.0:

If you want to toggle between HTML and the Markdown (preinstalled) UDL:

from Npp import notepad, LANGTYPE

NAME_OF_UDL = 'Markdown (preinstalled)' # <<- needs to be specified to match the UDL you want to select

language = notepad.getLangType()
desc = notepad.getLanguageDesc(language)    # this needs PythonScript 1.5.4 or newer

if desc == 'User Defined language file - {}'.format(NAME_OF_UDL):
    notepad.setLangType(LANGTYPE.HTML)
else:
    notepad.runMenuCommand('Language', NAME_OF_UDL)

If you want to toggle between two UDL, like Markdown (preinstalled) and Markdown (preinstalled dark mode):

from Npp import notepad, LANGTYPE

NAME_OF_UDL = 'Markdown (preinstalled)' # <<- needs to be specified to match the UDL you want to select
NAME_OF_UDL2 = 'Markdown (preinstalled dark mode)' # <<- needs to be specified to match the UDL you want to select

language = notepad.getLangType()
desc = notepad.getLanguageDesc(language)    # this needs PythonScript 1.5.4 or newer

if desc == 'User Defined language file - {}'.format(NAME_OF_UDL):
    notepad.runMenuCommand('Language', NAME_OF_UDL2)
else:
    notepad.runMenuCommand('Language', NAME_OF_UDL)

If you want to just always set the current language to the Markdown UDL, regardless of the current language, it’s even more simple:

from Npp import notepad

NAME_OF_UDL = 'Markdown (preinstalled)' # <<- needs to be specified to match the UDL you want to select

notepad.runMenuCommand('Language', NAME_OF_UDL)

Just save one or more of those scripts, and assign keyboard shortcut(s) as desired, and you can either toggle between two languages, or just use that shortcut for always setting to the same UDL.

Good luck.

László Bene

@peterjones, thank you so much for your help! Toggling between HTML and MarkDown via one hotkey is more than I wished for, and it works just fine.

Szymon Szymon

@PeterJones Works like a charm, 2minutes and configured, thanks