vscode-java-debug
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Add Support For Showing a Custom Type View via TypeCustomDebugDataView or Annotations
Hi,
It seems currently vscode-java-debug doesn't support a way to have different representations of a type during debug in inline view, "variables" and "watch" windows.
Environment
- Operating System: Windows 10 19043.1645 (x64)
- JDK version: Java 11 (Oracle JDK 16)
- Visual Studio Code version: 1.66.2
- Java extension version: 1.6.0
- Java Debugger extension version: 0.40.1
Steps To Reproduce
- Start a debugging session in vscode for any java file.
- See how class variables are represented in inline-view, "variables" and "watch" windows.
Current Result
For example, here is how it looks like during debug - inline view (extension version v0.40.1
):
and here is overridden toString
method in the Point
class:
notice, I have the following options in .vscode/settings.json
:
{
"java.debug.settings.showQualifiedNames": false,
"java.debug.settings.showToString": true,
"java.debug.settings.showLogicalStructure": true
}
also, when I expand an array in the variable view, the nested types are not showing until I click(...)
:
It seems there are no ways to enable a custom data view for a particular types, right?
Expected Result
It would be cool to have something like that:
It seems like it can be done using either:
- Adding an option to enable displaying a result of overridden
toString
method, e.g.java.debug.settings.showToStringInlineView: true
- Add "Java Type Renderer" to support custom data views similar to IntellijIdea "debugger -> Customize Data Views -> Java Type Renderer" (see link
#1
in Additional Informations) - Add something like
DebuggerDisplay
annotation similar to C#DebuggerDisplayAttribute
(see link#2
in Additional Informatins)
For me the second way seems more appealing because it may allow setting custom debug views even for Java internal classes like java.utils.ArrayList
Additional Informations
For example, here are some StackOverflow questions that illustrate the problem:
The latest VS Code 1.67 version introduces a new setting debug.autoExpandLazyVariables
to allow you to expand the variable toString value by default. Could you have a try to see if it meets your requirement?
Thanks! It works, and it's definitely better than nothing.
However, having a custom debug view for variables in the inline
view is still can provide a lot of value (separately from expanding toString
).
I think the answer is no, but is there a way to write a custom visualizer extension similar to how Visual Studio supports?