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Custom coloring for block of code [message #1819468]

Thu, 16 January 2020 00:20

Eclipse User

Hi,

Requirement is to custom color the block of code.
How can I achieve this?

Consider the below example.
<CodeBlock> which are under if(false) will not be executed. Requirement is to mark those as grayed out or any custom color. User will know that block will not be executed.


  if(true){
  
    <Code Block>

   }

   if(false){

    <Code Block>
   }

Please guide me how to proceed. Some pointers will be helpful.

Thanks and regards,
Virag Purnam

Re: Custom coloring for block of code [message #1819469 is a reply to message #1819468]

Thu, 16 January 2020 00:23

Eclipse User

please have a look at semantic highlighting

Re: Custom coloring for block of code [message #1819471 is a reply to message #1819469]

Thu, 16 January 2020 01:15

Eclipse User

Re: Custom coloring for block of code [message #1819472 is a reply to message #1819469]

Thu, 16 January 2020 01:20

Eclipse User

Thanks Mr. Christian Dietrich and Mr. Tamas Miklossy for the pointer.
I will look at semantic highlighting.

Re: Custom coloring for block of code [message #1819534 is a reply to message #1819472]

Thu, 16 January 2020 23:52

Eclipse User

Hi,

Semantic highlighting gets called during the start of application.
I want to achieve this dynamically.
When ever any 'if statement' is false, I want to gray out the code block present inside that.
Is there any class which I can refer?

Thanks and regards,
Virag

Re: Custom coloring for block of code [message #1819535 is a reply to message #1819534]

Fri, 17 January 2020 00:26

Eclipse User

I cannot follow you. Semantic highlighting is called when you type in the editor.
Please explain what you do

Re: Custom coloring for block of code [message #1819536 is a reply to message #1819535]

Fri, 17 January 2020 01:05

Eclipse User

Hi Mr. Christian Dietrich,

I have implemented TokenSource interface.
In the method nextToken(), I am checking IF condition.
If condition is false, I am making all the token present in IF block as SL comment, by changing token type.

But in editor, it does not appear as SL comment color. It retains its original color.

Thanks and regards,
Virag

Re: Custom coloring for block of code [message #1819537 is a reply to message #1819536]

Fri, 17 January 2020 01:06

Eclipse User

this makes no sense. this is not semantic highlighting

Re: Custom coloring for block of code [message #1819540 is a reply to message #1819537]

Fri, 17 January 2020 01:40

Eclipse User

You can find an example for semantic highlighting in the GEF DOT project:
https://github.com/eclipse/gef/blob/master/org.eclipse.gef.dot.ui/src/org/eclipse/gef/dot/internal/ui/language/highlighting/DotSemanticHighlightingCalculator.java

Re: Custom coloring for block of code [message #1819559 is a reply to message #1819540]

Fri, 17 January 2020 05:38

Eclipse User

Thanks Mr. Tamas Miklossy for the example. I will check, if I get something out of this.
Thanks Mr. Christian Dietrich. Yes requirement does not look nice. Just wanted to give try and check the feasibility.

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