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* ImageDiffHandler adds the slider; styled in gitblit.css
* imgdiff.js is a little bottom-loaded Javascript that adjusts the
opacity on sliders' scroll events.
* The three diff pages add this bottom script to the page if needed
* GitBlitDiffFormatter: center image diffs.
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Ticket 88: https://dev.gitblit.com/tickets/gitblit.git/88
Based on Lea Verou's pure CSS slider:
http://lea.verou.me/2014/07/image-comparison-slider-with-pure-css/
* Add a callback interface, pass it through DiffUtils to the
GitBlitDiffFormatter. Is needed because the rendering needs access
to the repositoryName and other things that are known only at higher
levels.
* New class ImageDiffHandler responsible for rendering an image diff.
Called for all binary diffs, doesn't do anything if it's not an
image. HTML is generated via JSoup: no worries about forgetting to
close a tag, not about HTML escaping, nor about XSS.
* The 3 diff pages set up such an ImageDIffHandler and pass it along.
* CSS changes: from Lea Verou, with some minor improvements.
I think in the long run there'll be no way around rewriting the
HTML diff formatter from scratch, not using the standard JGit
DiffFormatter at all.
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- As discussed:
- gutter a little lighter, context lines nearly but not quite
white.
- 2px left (and right) padding in the code column.
- I also noticed that somehow all lines were spaced vertically a little
wider than on dev.gitblit. Added cellpadding='0' to get the old line
height again.
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- Use git object ids as fragments and HTML element ids
- Simplify generation: don't parse the diff line, instead generate
the table header from the DiffEntry when we process it, and just
skip the diff lines.
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- Add the new settings to gitblit.properties
- Highlight trailing whitespace
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* Optimize CSS: simplify selectors. That alone cuts rendering time in
half!
* Adapt HTML generation accordingly.
* Change line number generation so that one can select only code lines.
Also move the +/- out of the code column; it also gets in the way
when selecting.
* Omit long diffs altogether.
* Omit diff lines for deleted files, they're not particularly
interesting.
* Introduce a global limit on the maximum number of diff lines to show.
* Supply translations for the languages I speak for the new messages.
https://code.google.com/p/gitblit/issues/detail?id=450 was about a diff
with nearly 300k changed lines (with more then 3000 files deleted). But
one doesn't have to have such a monster commit to run into problems. My
FF 32 become unresponsive for the 30+ seconds it takes it to render a
commitdiff with some 30000 changed lines. (90% of which are in two
generated files; the whole commit has just 20 files.) GitHub has no
problems showing a commitdiff for this commit, but omits the two large
generated files, which makes sense.
This change implements a similar thing. Files with too many diff lines
get omitted from the output, only the header and a message that the
diff is too large remains. Additionally, there's a global limit on
the length of a commitdiff; if we exceed that, the whole diff is
truncated and the files not shown are listed.
The CSS change improves performance by not using descendant selectors
for all these table cells. Instead, we assign them precise classes and
just use that in the CSS.
The line number generation thing using data attributes and a :before
selector in the CSS, which enables text selections only in the code
column, is not strictly XHTML 1.0. (Data attributes are a feature of
HTML 5.) However, reasonably modern browsers also handle this correctly
if the page claims to be XHTML 1.0. Besides, the commitdiff page isn't
XHTML compliant anyway; I don't think a pre-element may contain divs
or even tables.
(Note that this technique could be used on other diff pages, too. For
instance on the blame page.)
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Change-Id: I9f91138b20219be6e3c4b28251487df262bff6cc
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Change-Id: I8f26746a611e9ab955efe8b2597cc81db48fb085
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This is a massive commit which reorganizes the entire project structure
(although it is still monolithic), removes the Build classes, and
switches to Moxie, a smarter Ant build tookit based on the original
Gitblit Build classes.
The Ant build script will likely require additional fine-tuning, but
this is big step forward.
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