[preferences] fix the display of file icons

[vince-fugnitto]

What it does

Fixes #6990
Fixes #7010

• fixes an issue where the file icon was not properly displayed
• fixes an issue where the file icon was not properly updated
  based on the current file icon theme. This problem is solved by
  programmatically getting the icon based on the file-icon using
  the labelProvider#getIcon method.

TODO:

• fix the user file icon not being updated once a file icon theme change event occurs (this is probably due to how the user preferences editor is created).
• fix the display of file icons in the tab (make it consistent with other tabs) when changing file icon themes.

How to test

1. start the application and open the preferences widget.
2. change the file icon theme (the settings tabs (user + workspace)) should properly be updated with the corresponding file icon theme and should also be displayed properly.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

Signed-off-by: vince-fugnitto vincent.fugnitto@ericsson.com

[vince-fugnitto]

@akosyakov do you know as to why the file-icon for the user settings would not be updated but others will when updating the file-icon theme?

[akosyakov]

@vince-fugnitto one has to listen for changes on label provider and call getIcon again if a uri is affected

[elaihau]

I tested in gitpod with both Chrome and Firefox:

File icons across all tabs in the preference editor now look consistent.

Tested all 4 Icon themes, they all look good.

[elaihau]

One thing needs improvement though:

In a multi-root workspace the icons could look inconsistent.

the screenshot was from Chrome.
I understand why it happens - and I am not sure if it is in the scope of this PR.

[akosyakov]

Code-wise looks good, @elaihau could you finish the review please.

[elaihau]

Code-wise looks good, @elaihau could you finish the review please.

Sure I will see what Vincent says regarding this comment #7011 (comment)

[vince-fugnitto]

One thing needs improvement though:

In a multi-root workspace the icons could look inconsistent.

the screenshot was from Chrome.
I understand why it happens - and I am not sure if it is in the scope of this PR.

Could you help me reproduce the problem you've experienced @elaihau ?

I tried on my end with multiple different file-icon themes and experienced the following:

Theia

Seti

Minimal

None

[elaihau]

@vince-fugnitto this is what i see from gitpod. browser is Chrome.

[vince-fugnitto]

@vince-fugnitto this is what i see from gitpod. browser is Chrome.

Thank you! I’ll take a look tomorrow at work :)

[vince-fugnitto]

@elaihau do you expect that the workspace file should display the .json icon?
It is a different type of file (.theia-workspace) and is displayed different in other areas (explorer, file dialog, quick-file-open).

[elaihau]

@elaihau do you expect that the workspace file should display the .json icon?
It is a different type of file (.theia-workspace) and is displayed different in other areas (explorer, file dialog, quick-file-open).

i don't expect the code to be smart enough to detect json data from a file that doesn't have the ".json" extension.

the question in my mind is: why is the workspace tab header and file icon displayed properly when the multi-root workspace is created, but refreshed into "Untitled.work-space" after the execution of "change file icon theme" command?

like i said earlier, i am not sure if it is in the scope of this PR, and i am OK with not fixing this scenario

[elaihau]

i will approve this pr after you fix the travis biuld

[vince-fugnitto]

i will approve this pr after you fix the travis biuld

There seems to be an issue with the Windows build at the moment for multiple pull-requests :(
#7064

[vince-fugnitto]

@elaihau do you expect that the workspace file should display the .json icon?
It is a different type of file (.theia-workspace) and is displayed different in other areas (explorer, file dialog, quick-file-open).

i don't expect the code to be smart enough to detect json data from a file that doesn't have the ".json" extension.

the question in my mind is: why is the workspace tab header and file icon displayed properly when the multi-root workspace is created, but refreshed into "Untitled.work-space" after the execution of "change file icon theme" command?

What do you think should be the correct behavior, to display Workspace or the *.theia-workspace name?

[elaihau]

There seems to be an issue with the Windows build at the moment for multiple pull-requests :(
#7064

yea your latest css change shouldn't have the power of failing the build :)

What do you think should be the correct behavior, to display Workspace or the *.theia-workspace name?

as a user i would expect the tab header text "workspace" stays unchanged.
please double check with others in the team. it is just my opinion.

[vince-fugnitto]

There seems to be an issue with the Windows build at the moment for multiple pull-requests :(
#7064

yea your latest css change shouldn't have the power of failing the build :)

I hope not haha :)

What do you think should be the correct behavior, to display Workspace or the *.theia-workspace name?

as a user i would expect the tab header text "workspace" stays unchanged.
please double check with others in the team. it is just my opinion.

I'll see what I can do :) I believe vscode keeps it as workspace as well.

[vince-fugnitto]

@elaihau it should be fixed in the latest iteration :)

[elaihau]

@elaihau it should be fixed in the latest iteration :)

yep, i played with it one more time and it looks good.
Thank you for your work !