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    [New Plugin] LuaScript

    Plugin Development
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    • dail
      dail last edited by

      @Yaron

      Thanks for trying this out.

      On restarting NPP, the new script was not available in the menu.

      Currently that is not possible. In the future I hope to have some way of running scripts or specific functions by using shortcut keys, menu, etc.

      It would be nice to have a function coping the current line regardless of any selection (like editor.lineCopy() in PythonScript).

      I agree having more small helper functions like this would be nice. So far what I did was just steal code from SciTE and implement the same API they have for using Lua.

      1 Reply Last reply Reply Quote 0
      • Yaron
        Yaron last edited by

        Hello dail,

        Thanks for replying.

        I use Dave’s PythonScript and absolutely love it.
        Still, one can always learn and benefit from other good options.

        I’m glad you plan to continue developing “LuaScript”. I’ll be looking forward to the next versions.

        Thanks again for your great work.

        Best regards.

        1 Reply Last reply Reply Quote 0
        • dail
          dail last edited by

          I agree the PythonScript plugin is very useful. I plan on stealing borrowing lots of code from that :)

          1 Reply Last reply Reply Quote 1
          • Yaron
            Yaron last edited by

            I’m sure Dave would approve the borrowing. :)
            That would be great.

            When you start working on displaying custom scripts in the menu, please consider the following point:
            As far as I know, you can’t assign a nested plugin command to NPP context-menu.
            So it would be nice to have an option to display scripts in the LuaScript’s main menu.

            Thanks again and best of luck.

            1 Reply Last reply Reply Quote 0
            • dail
              dail last edited by dail

              Version 0.1.1 has been released to fix several important bugs.

              Thanks @Claudia-Frank for the testing!

              1 Reply Last reply Reply Quote 1
              • Ethan Piliavin
                Ethan Piliavin last edited by

                Wow! Very exciting. I am looking forward to testing this as a lightweight replacement for PythonScript.

                I agree that we should have an easy/smart way to access the scripts from the menu/toolbar/context.

                Can you provide some explanation of how to store and access scripts? What folder do they go into? Is it possible to include other (external) lua libraries from ?

                dail 1 Reply Last reply Reply Quote 0
                • dail
                  dail @Ethan Piliavin last edited by

                  @Ethan-Piliavin said:

                  Can you provide some explanation of how to store and access scripts? What folder do they go into? Is it possible to include other (external) lua libraries from ?

                  Since this isn’t possible yet I haven’t really given it much thought at all. My knowledge is very lacking of the Win32 API to create menus dynamically, etc. More than likely I’m going to re-use code (like any good software engineer should do) from the PythonScript plugin. So most likely you will see a lot of similarities. That kind of capability might be a little while in the future since for now I’m focusing on just getting the Lua API working as I want.

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                  • dail
                    dail last edited by

                    v0.2.0 has been released! Comments/questions/suggestions are welcome.

                    Major updates include:

                    • Upgraded Lua to 5.3
                    • Ability to assign shortcut keys to Lua functions
                    • Register callback functions for several events

                    For example many editors support finding the next match and also selecting it so that multiple instances can be edited at the same time. Placing this code in the startup script adds that functionality to a shortcut.

                    function SelectionAddNext()
                    	-- From SciTEBase.cxx
                    	local flags = 0 -- can use SCFIND_MATCHCASE
                    	if not editor.SelectionEmpty and editor:IsRangeWord(editor.SelectionStart, editor.SelectionEnd) then
                    		flags = flags | SCFIND_WHOLEWORD
                    	end
                    	editor:SetTargetRange(0, editor.TextLength)
                    	editor.SearchFlags = flags
                    	
                    	-- From Editor.cxx
                    	if editor.SelectionEmpty or not editor.MultipleSelection then
                    		local startWord = editor:WordStartPosition(editor.CurrentPos, true)
                    		local endWord = editor:WordEndPosition(startWord, true)
                    		editor:SetSelection(startWord, endWord)
                    	else
                    		local i = editor.MainSelection
                    		local s = editor:textrange(editor.SelectionNStart[i], editor.SelectionNEnd[i])
                    		local searchRanges = {{editor.SelectionNEnd[i], editor.TargetEnd}, {editor.TargetStart, editor.SelectionNStart[i]}}
                    		for _, range in pairs(searchRanges) do
                    			editor:SetTargetRange(range[1], range[2])
                    			if editor:SearchInTarget(s) ~= -1 then
                    				editor:AddSelection(editor.TargetStart, editor.TargetEnd)
                    				editor:ScrollRange(editor.TargetStart, editor.TargetEnd)
                    				break
                    			end
                    		end
                    	end
                    end
                    
                    npp.AddShortcut("Selection Add Next", "Ctrl+Shift+D", SelectionAddNext)
                    
                    Claudia Frank 1 Reply Last reply Reply Quote 1
                    • Claudia Frank
                      Claudia Frank @dail last edited by

                      @dail

                      Comments/questions/suggestions are welcome.

                      You asked for ;-)

                      • make it theme aware
                      • make userdata visible so that reflection can be used to execute code
                      • possibility to clear console

                      BUT, regardless of my whises - GOOD JOB

                      Cheers
                      Claudia

                      1 Reply Last reply Reply Quote 0
                      • dail
                        dail last edited by dail

                        @Claudia-Frank

                        You asked for ;-)

                        Yep! Alot of this has been driven by my specific needs so the development can be kind of narrow. So it is always good to hear others’ ideas!

                        make it theme aware

                        Notepad++ doesn’t expose near enough API to make this possible without very ugly hacks. I tried a few hacks without much luck. However, there is a way partial way around this. There is a console object that you can use that is just like the editor object but it controls (no surprise) the console. In your startup script you can manually configure the styles for your theme doing something like this for each style Lua uses:

                        console.StyleFore[SCE_LUA_COMMENT] = 0x272822
                        

                        This is not dynamic in any way, but if you are desperate you can hard-code alot of values.

                        make userdata visible so that reflection can be used to execute code

                        Care to elaborate a bit?

                        possibility to clear console

                        Good idea. Until then you can use this code:

                        function clear()
                        	console.ReadOnly = false
                        	console:ClearAll()
                        	console.ReadOnly = true
                        end
                        

                        But agree a more user-friendly and intuitive option should also be added.

                        1 Reply Last reply Reply Quote 0
                        • Claudia Frank
                          Claudia Frank last edited by

                          In python script you could do

                          dir(editor)
                          

                          to get the list of editor functions.
                          With lua you could use getmetatable(editor) to get the same
                          but editor must have a metatable of course.

                          My idea behind is to use that kind of reflection to create automated test cases and
                          easily see if there are new functions. Another idea might be to enhance npp with
                          lua script for a dynamic intellisense and debugging functionality.

                          Cheers
                          Claudia

                          1 Reply Last reply Reply Quote 0
                          • dail
                            dail last edited by

                            Alot of the internal code came directly from SciTE. Mainly because I had no idea what I was doing (and honestly still don’t understand alot of it) ;)

                            Since the editor object has >400 methods/properties (not including getters and setters) there isn’t a Lua table that holds all this kind of information. Methods and properties are looked up as they are used, which helps reduce memory, etc especially since only a hand full of them are probably going to be used on a regular basis. That being said I’m not opposed to exposing some way to get this data. I’m certainly open to suggestions and use-cases.

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                            • Claudia Frank
                              Claudia Frank last edited by Claudia Frank

                              To be honest, I just read about the possibility of having userdata exposing metable a few days ago. ;-)
                              Seems to be a new feature in lua 5.3 - I will try to get more details about it and if I feel I understood enough
                              I might open a feature request ;-)

                              Cheers
                              Claudia

                              1 Reply Last reply Reply Quote 1
                              • dail
                                dail last edited by

                                @Yaron

                                In case you are curious, this is how you’d get Visual Studio-like copy and paste functionality:

                                -- Mimic Visual Studio's "Ctrl+C" that copies the entire line if nothing is selected
                                npp.AddShortcut("Copy Allow Line", "Ctrl+C", function()
                                    editor:CopyAllowLine()
                                end)
                                
                                -- Mimic Visual Studio's "Ctrl+X" that cuts the line if nothing is selected
                                npp.AddShortcut("Cut Allow Line", "Ctrl+X", function()
                                    if editor.SelectionEmpty then
                                        editor:CopyAllowLine()
                                        editor:LineDelete()
                                    else
                                        editor:Cut()
                                    end
                                end)
                                

                                Also shortcuts show up in the plugin’s main menu so in theory you can assign them to N++'s context menu.

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                                • guy038
                                  guy038 last edited by guy038

                                  Hi All,

                                  A simple method to mimic the Visual Studio’s shortcuts ( CTRL +C/X ) is to change the default shortcuts of the lines 91 and 92, of the Scintilla commands tab, in the Shortcut Mapper !

                                  Just set the shortcut ALT + CTRL + X, in line 91 and the shortcut ALT + CTRL + C, in line 92

                                  Of course, I need to use the additional ALT key. So, it’s not as neat as the Dail’s Lua script :-) But this may help, anyway !

                                  REMARK : If I remember correctly, I think that :

                                  • The ALT + CTRL + C shortcut is used, by default, to open the Color Picker plugin

                                  • The ALT + CTRL + X shortcut performs, by default, the option Translate CamelCase/underscore_case of the Translate plugin

                                  So, be aware of that, if you use the Color Picker and/or Translate plugins !

                                  Cheers,

                                  guy038

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                                  • dail
                                    dail last edited by

                                    Just using SCI_LINECUT and SCI_LINECOPY doesn’t quite match Visual Studio’s behavior. ;)

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                                    • guy038
                                      guy038 last edited by

                                      Hi Dail,

                                      I, first, based on your two comments, in your Lua script, below :

                                      – Mimic Visual Studio’s “Ctrl+C” that copies the entire line if nothing is selected

                                      – Mimic Visual Studio’s “Ctrl+X” that cuts the line if nothing is selected

                                      As you said that SCI_LINECUT and SCI_LINECOPY don’t have exactly the same behaviour :

                                      • I downloaded your last 0.2.0 version of your Lua plugin

                                      • After some searches, in your Lua documentation, I understood that the Notepad object npp.AddShortcut must be called, on startup only !

                                      • So, I put your lua script text, inside the StartUp script and save it. Then, I closed and restarted my 6.8.8 N++.

                                      => As expected, the new commands CTRL + C and CTRL + X do the job, nicely, even if no selection exists !

                                      Unfortunately, I couldn not see any difference with the Scintilla commands SCI_LINECUT and SCI_LINECOPY ( that I kept, with the ALT + CTRL + X/C shortcuts ), even after pasting the clipboard contents, in an other document !

                                      What I’m missing ?

                                      Cheers,

                                      guy038

                                      1 Reply Last reply Reply Quote 0
                                      • dail
                                        dail last edited by dail

                                        With the two shortcuts I’ve posted they work to enhance the normal copy and cut functionality. If there is a selection they both work as normal copy/cut. If there is no selection then they behave by copying or cutting the line. However, SCI_LINECUT and SCI_LINECOPY doesn’t pay any attention the the selection.

                                        Secondly, to quote the documentation about SCI_COPYALLOWLINE

                                        On Windows, an extra “MSDEVLineSelect” marker is added to the clipboard which is then used in SCI_PASTE to paste the whole line before the current line.

                                        So the difference is when it is pasted it replaces the entire line instead of pasting the line directly at the cursor’s position.

                                        Similar effects can be achieved both ways but users that are use to Visual Studios will definitely notice a difference.

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                                        • Yaron
                                          Yaron last edited by

                                          Hello all,

                                          @Claudia-Frank,
                                          Thank you for your contribution (and generosity…).

                                          @guy038,
                                          Thank you for your contribution. Nice to see an old friend. :)

                                          @dail,
                                          Thank you for further developing and improving this important plugin. Great work.

                                          And thanks also for referring to my Copy Line request. Really nice.

                                          It would be nice to have a function coping the current line regardless of any selection (like editor.lineCopy() in PythonScript).

                                          I actually meant an option to copy the entire line even if part of it is selected.
                                          In a future version. :)

                                          And, with your permission, two more requests:

                                          1. A context-menu in the Console Output field.
                                          2. An option to change text direction (LTR/RTL) in the Console Input field.
                                            (PythonScript uses the System Edit-Context-Menu which includes this functionality).

                                          Best regards.

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                                          • dail
                                            dail last edited by

                                            @Yaron

                                            I actually meant an option to copy the entire line even if part of it is selected.

                                            If I understand what you are wanting you can simply use editor:LineCopy()

                                            A context-menu in the Console Output field.

                                            Would be simple to add. If you want you can open a feature request on Github and we can discuss it more there.

                                            An option to change text direction (LTR/RTL) in the Console Input field.

                                            One of the change I made from PythonScript was replace the input field with a Scintilla control. So I’m not sure how easy this would be to change the text direction.

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