Increase scrollback size for Dart Editor Console window

[DartBot]

This issue was originally filed by jackpa...@google.com

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The current dart editor Console window has a very small (200 line?) scrollback buffer. It should be at least 10,000 lines by default, and ideally grow automatically.

[pq]

Set owner to @pq.
Added Accepted label.

[pq]

To me the buffer looks a bit bigger. For example running the following server app:

void main() {
  for (int i=0; i < 10000; ++i) {
    print("Hello $i");
  }
}

I can scroll back to "Hello 2727".

If you're seeing less scroll-back than that maybe the console is getting cleared unexpectedly which may well be a bug. Can you share a snippet that reproduces the behavior?

Thanks!

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Added NeedsInfo label.

[DartBot]

This comment was originally written by jackpa...@google.com

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Maybe it's related to the length of the line? I noticed the problem when printing of a recursive directory listing.

I took your snippet and modified it to print more text on each line, and I only got the last 740 lines in the transcript window.

void main() {
  for (int i=0; i < 10000; ++i) {
    print("Hello $i lskdfjasl;kdfj ;laskdfj l;askdfj ;laskdfj ;lsakdfj ;lsadkfj a;sldkfj as;ldkfj as;dlfkj s;ldfkj");
  }
}

[pq]

Quite right! It is char limited and not line limited.

After some digging, it looks like this limiting is something we inherit from the process launching framework we ultimately delegate to. The server process we create handles its own output stream monitoring and wires its stream up to the stream that is attached to the visible console display in the editor. Not sure how heroic we'd have to be to change the throttling. Of course, I could be totally off base and have overlooked something obvious... In hopes of that I'll punt back to the team to see if another set of eyes sees something else.

Thanks again for the feedback!

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Removed the owner.
Added Triaged label.

[devoncarew]

Set owner to @devoncarew.

[devoncarew]

Added Fixed label.