Vim using wrong colors

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• How to make vimdiff to detect differences in line ending characters(dos vs unix)

  When comparing two files with same content but with line endings, vim diff does not detect the difference. Is there a way to make vimdiff show the difference.
• How can a callback be specified when opening a channel in Vim?

  I'm reading :h channel-demo, which explains how you can send a message to a process via a channel, in three steps:

  1. open a second terminal, and run $VIMRUNTIME/tools/demoserver.py; on my machine the output of :echo $VIMRUNTIME/tools/demoserver.py is /usr/local/share/vim/vim81/tools/demoserver.py, so that's the command which I run in the shell

  2. in the first Vim terminal, run :let channel = ch_open('localhost:8765') to open a channel, and save its handle in a variable

  3. then run :echo ch_evalexpr(channel, 'hello!') to send the message hello! to the python server

  So far everything works as expected.

  Then, the help explains how to define a callback which will be run automatically whenever Vim receives an answer from the server:

   func MyHandler(channel, msg)
     echo "from the handler: " . a:msg
   endfunc
  

  And demonstrates how to use the callback with this command:

  :call ch_sendexpr(channel, 'hello!', {'callback': "MyHandler"})
  

  Again, it works.

  Now instead of specifying the callback for every message sent, the help explains that you can specify it when you open the channel by passing the optional dictionary argument {'callback': "MyHandler"} to ch_open():

  :call ch_close(channel)
  :let channel = ch_open('localhost:8765', {'callback': "MyHandler"})
  :call ch_sendexpr(channel, 'hello!')
  

  It almost works, but the callback doesn't seem to be invoked because I can't see the message from the handler: got it, when the answer from the server is received.

  I thought that maybe the callback was invoked but the message was silenced, so I replaced the code of the callback with an assignment:

  func MyHandler(channel, msg)
    let g:counter = get(g:, 'counter', 0) + 1
  endfunc
  

  If the callback was invoked, g:counter should be created. But in practice, after calling ch_sendexpr(), g:counter is not created.

  I thought that maybe some configuration in my vimrc was interfering, so I re-tried the same commands with no configuration ($ vim -Nu NONE). But the result was identical.

  I tried to log the activity on the channel by invoking ch_logfile():

  :call ch_logfile('/tmp/log', 'w')
  

  Here's what the logfile contains:

  ==== start log session ====
    7.752025 SEND on 0(sock): '[2,"hello!"]
  '
    7.752171 : looking for messages on channels
    7.753345 RECV on 0(sock): '[2, "got it"]'
    7.753363 on 0: Getting JSON message 2
    7.753374 on 0: Dropping message 2 without callback
   11.756455 : looking for messages on channels
  

  It says that the received message has no callback, because of this line:

  7.753374 on 0: Dropping message 2 without callback
  

  In contrast, if I specify the callback in ch_sendexpr(), instead of ch_open(), the logfile contains:

  ==== start log session ====
    7.159855 SEND on 1(sock): '[2,"hello!"]
  '
    7.159968 : looking for messages on channels
    7.160214 RECV on 1(sock): '[2, "got it"]'
    7.160232 on 1: Getting JSON message 2
    7.160248 on 1: Invoking one-time callback MyHandler
  

  This time, the callback was correctly invoked, because of this line:

    7.160248 on 1: Invoking one-time callback MyHandler
  

  ---

  I read :h ch_open(), but couldn't find any syntax error in the command:

  :let channel = ch_open('localhost:8765', {'callback': "MyHandler"})
  

  The signature of the function is:

  ch_open({address} [, {options}])
  

  {options} is described at :h channel-open-options as an optional dictionary, which can contain the callback key documented at :h channel-callback:

  "callback" A function that is called when a message is received that is not handled otherwise. It gets two arguments: the channel and the received message. Example:

      func Handle(channel, msg)
        echo 'Received: ' . a:msg
      endfunc
      let channel = ch_open("localhost:8765", {"callback": "Handle"})
  

  ---

  How can a callback be specified when opening a channel in Vim?
• rust vim plugin file type detection not working

  I installed the rust.vim plugin in ~/.vim/pack/plugins/start. If I open a file called main.rs and type :scriptnames, here is the output

  `

   1: /usr/share/vim/vimrc
    2: /usr/share/vim/vim74/debian.vim
    3: /usr/share/vim/vim74/syntax/syntax.vim
    4: /usr/share/vim/vim74/syntax/synload.vim
    5: /usr/share/vim/vim74/syntax/syncolor.vim
    6: /usr/share/vim/vim74/filetype.vim
    7: /usr/share/vim/vim74/ftplugin.vim
    8: /usr/share/vim/vim74/indent.vim
    9: ~/.vim/plugin/ScrollColor.vim
   10: ~/.vim/plugin/color_sample_pack.vim
   11: ~/.vim/plugin/mimicpak.vim
   12: /usr/share/vim/vim74/plugin/getscriptPlugin.vim
   13: /usr/share/vim/vim74/plugin/gzip.vim
   14: /usr/share/vim/vim74/plugin/logiPat.vim
   15: /usr/share/vim/vim74/plugin/matchparen.vim
   16: /usr/share/vim/vim74/plugin/netrwPlugin.vim
   17: /usr/share/vim/vim74/plugin/rrhelper.vim
   18: /usr/share/vim/vim74/plugin/spellfile.vim
   19: /usr/share/vim/vim74/plugin/tarPlugin.vim
   20: /usr/share/vim/vim74/plugin/tohtml.vim
   21: /usr/share/vim/vim74/plugin/vimballPlugin.vim
   22: /usr/share/vim/vim74/plugin/zipPlugin.vim
   23: ~/.vim/pack/plugins/start/rust.vim/plugin/cargo.vim
   24: ~/.vim/pack/plugins/start/rust.vim/plugin/rust.vim
   25: ~/.vim/pack/plugins/start/rust.vim/ftdetect/rust.vim
   26: /usr/share/vim/vim74/syntax/hercules.vim
  

  `

  If I type :set ft, here is the output:

  filetype=hercules
  

  Output of :autocmd filetypedetect pertaining to hercules:

  *.vc      setf hercules
  *.ev      setf hercules
  *.rs      setf hercules
  *.sum     setf hercules
  *.errsum  setf hercules
  

  There is no lines pertaining to rust

  Output of :20verbose e main.rs pertaining to hercules:

  Executing BufRead Auto commands for "*.rs"
  autocommand setf hercules
  line 0: setf hercules
  

  followed by a bunch of lines about the formatting of hercuels.

  Searching for "/.vim/ftplugin/hercules.vim"
  Searching for "/.vim/ftplugin/hercules_*.vim"
  Searching for "/.vim/ftplugin/hercules/*.vim"
  Searching for "/.vim/pack/plugins/start/rust.vim/ftplugin/hercules.vim"
  Searching for "/.vim/pack/plugins/start/rust.vim/ftplugin/hercules_*.vim"
  Searching for "/.vim/pack/plugins/start/rust.vim/ftplugin/hercules/*.vim"
  Searching for "/var/lib/vim/addons/ftplugin/hercules.vim"
  Searching for "/var/lib/vim/addons/ftplugin/hercules_*.vim"
  Searching for "/var/lib/vim/addons/ftplugin/hercules/*.vim"
  Searching for "/usr/share/vim/vimfiles/ftplugin/hercules.vim"
  

  This block of Searching for gets repeated later as well. At the very end of the output is this:

   Executing BufRead Auto commands for "*.rs"
  autocommand setf rust
  line 0: setf rust
  Executing BufEnter Auto commands for "*"
  autocommand sil call s:LocalBrowse(expand("<amatch>"))
  line 0: sil call s:LocalBrowse(expand("<amatch>"))
  

  Can anybody tell me how to make vim read the filetype as rust instead of hercules?
• Why is the object's color not being loaded?

  I've managed to save a 3D object's position, rotation, scale, color, and shape. However, when I try to load the object, the color doesn't display; but everything else is working fine. I tried using "newObject.GetComponent().material.color = colorOfObject" via a peer's suggestion, but the compiler doesn't like the syntax. Am I on the right track?

  Note: I just included my code for the cube option to provide a shorter block of code, but I do have other shape options that the user can choose.

          // Saving
          if (GUI.Button(new Rect(700, 330, 50, 30), "Save"))
          {
              // Saving the object's color and resetting it to white
              Color colorOfObject = rend.material.GetColor("_Color");
              PlayerPrefs.SetFloat("rValue", colorOfObject.r);
              PlayerPrefs.SetFloat("gValue", colorOfObject.g);
              PlayerPrefs.SetFloat("bValue", colorOfObject.b);
              rend.material.SetColor("_Color", Color.white);
          }
  
          // Loading
          if (GUI.Button(new Rect(770, 330, 50, 30), "Load"))
          {
              GameObject newObject;
  
              if (PlayerPrefs.GetString("Shape") == "cube")
          {
              newObject = GameObject.CreatePrimitive(PrimitiveType.Cube);
              newObject.AddComponent<cubeControls>();
  
              newObject.transform.position = new Vector3(PlayerPrefs.GetFloat("xCoord"), PlayerPrefs.GetFloat("yCoord"), PlayerPrefs.GetFloat("zCoord"));
              newObject.transform.rotation = Quaternion.Euler(PlayerPrefs.GetFloat("xRot"), PlayerPrefs.GetFloat("yRot"), PlayerPrefs.GetFloat("zRot"));
              newObject.transform.localScale = new Vector3(PlayerPrefs.GetFloat("xScale"), PlayerPrefs.GetFloat("yScale"), PlayerPrefs.GetFloat("zScale"));
  
              Color defaultColor = Color.white;
              Color colorOfObject = new Color(PlayerPrefs.GetFloat("rValue", defaultColor.r), PlayerPrefs.GetFloat("gValue", defaultColor.g), PlayerPrefs.GetFloat("bValue", defaultColor.b));
              //rend.material.SetColor("_Color", colorOfObject);
              newObject.GetComponent().material.color = colorOfObject;
              Destroy(gameObject);
          }
  
• list of colors between mulitiple colors in python

  For my project, I need to show the value of a variable from min to max using a user-defined number of colors. this user-defined variable(numberOfLevels) is a multiplication of 5 (5,10,15,20,25,...). though, it is not that easy because the final color palette is a range of colors between multiple colors. So I have a palette of 5 initial colors and I want to convert it to a palette with 40 colors, where colors are equally divided across 5 initial colors.

  here's an example of the initial color palette

  paletteList = [
  [Color("#ff0000"),
  Color("#ff8000"),
  Color("#ffff00"),
  Color("#00ffff"),
  Color("#0000ff")],
  ]
  

  and here's the formula I have crafted to make the final color palette

  numberOfLevels = 40
  sizeOfBucket = int(numberOfLevels / 5)
  
  for x in range(0, len(paletteList[0])-1 ):
      templist = list(paletteList[0][x].range_to(paletteList[0][x+1],sizeOfBucket+1))
      for m in templist:
      res.append(m)
  

  to remove repeated colors

  for m in res:
      if m not in templist:
             templist.append(m)
  

  the problem with this code is that it shows 36 colors while I asked of 40
• extract single colour from an image and replace it with it's background

  I need to take a color and extract that color from an image and replace it with its background. something like this.

  before image

  after operations
• Color scheme trasformations

  Given a set of colors, say colors on this webpage, and another palette of an equal number of colors, what would be a good way to map the former to the latter while:

  • preserving contrast between individual colors
  • preserving the relative intensity of the colors (not sure how important this would be)

  Essentially, this webpage should be rendered in the new color palette while still legible.

  What color space would be appropriate for this task?

  Can you also point me to any related work?

  Update: The mapping can surely be done manually but I intend to automate the mapping for any given set of colors and palette and so I'm looking for an algorithmic approach or rather an understanding of what properties need to be preserved in favor of legibility and beauty.
• Change function parameters color

  I'm trying to import my custom color scheme from Sublime to VSCode. I'm almost done but the only thing that I can't change is the color of parameters for a function.

  

  $timeOut stays white between the parenthesis, no matter the scope I try. I tried meta.function.parameter.typehinted.php, meta.function.parameters.php.

  The only one that "works" is variable.other.php. But unfortunately, it changes all the variables' color, not only the parameters' one.

  Here is what I get when inspecting the TM Scopes:

  

  Is there any way to change only the color of the function parameters?
• Changing background color of "default" tokens in Sublime Text

  I would like to change the background color of unscoped tokens (i.e. the ones to which the foreground color applies. How can I do that?

  Note that I don't want to change the background of the whole editor.
• How to run shell script by including "cd" command in ubuntu?

  I am trying to execute a shell script for automating the process rather than manually running the python script. But i am getting the error folder not found.

  cd /home/gaurav/AndroPyTool
  
  export ANDROID_HOME=$HOME/android-sdk-linux/
  
  export PATH=$PATH:$ANDROID_HOME/tools
  
  export PATH=$PATH:$ANDROID_HOME/platform-tools
  
  source ~/.bashrc
  
  source droidbox_env/bin/activate
  
  alias mycd='cd /home/gaurav/AndroPyTool/test'
  mycd
  pwd
  
  python androPyTool.py -all -csv EXPORTCSV.csv -s mycd
  
  >>>> AndroPyTool -- STEP 1: Filtering apks
  
  Folder not found!
  

  This is the error i am getting because the script is not able to find the path that i have provided above. The part after "-s" in the code represents the folder path where the file stored.
• Print bold or colored text from Makefile rule

  I'm trying to print bold text from the following Makefile :

  printf-bold-1:
      @printf "normal text - \e[1mbold text\e[0m"
  

  But, escape sequences are printed as-is, so when running make printf-bold-1, I got :

  normal text - \e[1mbold text\e[0m

  Instead of expected :

  normal text - bold text

  It's weird because I can print bold text from my terminal : running directly command printf "normal text - \e[1mbold text\e[0m" produces, as expected :

  normal text - bold text

  In the Makefile, I tried to use @echo or echo instead of @printf, or print \x1b instead of \e, but without success.

  Here are some variables describing my environment (Linux with standard Gnome terminal), if that can help :

  COLORTERM=gnome-terminal
  TERM=xterm-256color
  

  Note also that on some colleagues laptops (Mac), bold text is printed correctly.

  What is the portable way, working on every environment, to print bold or colored text from a Makefile rule?
• run ubuntu gnome-terminal from apache php

  I am trying to run follow command under apache php, ubuntu 18, php 7.2:

  exec('DISPLAY=:0 gnome-terminal')
  

  I am getting error:

  No protocol specified
  Unable to init server: Could not connect: Connection refused
  # Failed to parse arguments: Cannot open display: 
  

  Expected behavior:

  Gnome terminal must be opened