Summary

Introducing Thumbnail Integration through Extensions

Review Request #3614 — Created Dec. 3, 2012 and submitted Dec. 4, 2012, 5:47 a.m.

Information

Owner

slchen

Repository

Review Board

Branch

master

Bugs

Depends On

Reviewers

Groups

reviewboard

People

Description

ReviewBoard Extensions can now define how to create thumbnails
for specified file attachment mimetypes.

Added FileAttachmentThumbnailHook to generalize a hook point for
all files of all mimetypes. Mimetype Handlers for text-based
mimetypes can leverage `reviewboard.attachments.mimetypes.TextMimetype`
by simply overriding `_generate_preview_html` to define how to
generate the HTML used in the thumbnail, instead of having to
redefine `get_thumbnail`.

Testing Done

Test Steps:

- Disabled the registration of XMLMimetype in reviewboard.attachments.__init__ (
- Verified that XML thumbnails now fall back to raw uncolored text)
- Copied over the XMLReviewUIExtension from the sample extension branch, and:
  - Added XMLThumbnail.py to define the XMLMimetype class for generating XML thumbnails
  - Modified extensions.py to use the FileAttachmentThumbnailHook to hook XMLMimetype into ReviewBoard to handle XML thumbnails.
- Verified that the Extension installs without error
- Verified that Extension-installed XML thumbnails feature work exactly as did before.

(see attached screenshot, disregard the hyperlink lines - that was due to a separate change to master: http://reviews.reviewboard.org/r/3569/)

Files

Issues

Description	From	Last Updated
Why are the *s on different lines?	david	Dec. 3, 2012, 11:42 p.m.

Change Summary:

Fixed minor style issue.

Diff:

Revision 2 (+39 -1)

Show changes

reviewboard/extensions/hooks.py

Change Summary:

Fixed more minor style issues.

Diff:

Revision 3 (+40 -2)

Show changes

reviewboard/extensions/hooks.py

This looks pretty good. Just one question.

reviewboard/extensions/hooks.py (Diff revision 3)

The issue has been dropped. Show all issues

Why are the *s on different lines?

slchen Dec. 3, 2012, 8:25 a.m.

I believe this is the syntax used when items in a list need span multiple lines in the pre-rendered docs text:

Raw: https://github.com/reviewboard/reviewboard/blob/master/docs/codebase/extending/extensions.txt#L350
Result: http://www.reviewboard.org/docs/codebase/dev/extending/extensions/#settings-form
Similar comments: http://reviews.reviewboard.org/r/3596/diff/1/?file=25245#file25245line482

david Dec. 3, 2012, 11:19 p.m.

Okay. I'm not very familiar with rst, I guess.

Why is the text so tiny?

slchen Dec. 3, 2012, 2:46 p.m.

A few possible reasons:
- Text for XML might appear smaller by contrast as I stopped zooming in to take the screenshots.
- I've noticed that markdown, docutil, and pygments produce different style/layouts of HTML based on raw text: they all use the same div class "file-thumbnail-clipped" in reviewboard/static/rb/css/reviews.less to scale down font-sizes by 40% on "p, table, pre, code, img, li, h1, h2, h3, h4, h5, h6" - but markdown files will appear slightly larger than .rst or .xml counterparts visually.

However, the thumbnail text render size is not affected by this change in particular: XML thumbnails render and behave exactly the same when enabled as part of RB, or as through an Extension.

Ship it!

```
Ship It!
```

Status:: Completed
Change Summary:: Pushed to release-1.7.x (63f82e2). Thanks!