This is a bit hacky, but avoids incorrectly checking Handlebars
templates for Django style templates, which in particular interacts
poorly with ICU Message plural syntax.
Now we only tokenize the file once, and we pass
**validated** tokens to the pretty printer.
There are a few reasons for this:
* It obviously saves a lot of extra computation
just in terms of tokenization.
* It allows our validator to add fields
to the Token objects that help the pretty
printer.
I also removed/tweaked a lot of legacy tests for
pretty_print.py that were exercising bizarrely
formatted HTML that we now simply ban during the
validation phase.
I rewrote most of tools/lib/pretty-printer.py, which
was fairly easy due to being able to crib some
important details from the previous implementation.
The main motivation for the rewrite was that we weren't
handling else/elif blocks correctly, and it was difficult
to modify the previous code. The else/elif shortcomings
were somewhat historical in nature--the original parser
didn't recognize them (since they weren't in any Zulip
templates at the time), and then the pretty printer was
mostly able to hack around that due to the "nudge"
strategy. Eventually the nudge strategy became too
brittle.
The "nudge" strategy was that we would mostly trust
the existing templates, and we would just nudge over
some lines in cases of obviously faulty indentation.
Now we are bit more opinionated and rigorous, and
we basically set the indentation explicitly for any
line that is not in a code/script block. This leads
to this diff touching several templates for mostly
minor fix-ups.
We aren't completely opinionated, as we respect the
author's line wrapping decisions in many cases, and
we also allow authors not to indent blocks within
the template language's block constructs.
We disallow this HTML:
junk-text-before-open-tag<p>
This is a paragraph.
</p>
We rarely see the above mistake, but we want to eliminate
the possibility to be somewhat rigorous, and so that we
can eliminate a pretty-printer mis-feature.
This reverses the policy that was set, but incompletely enforced, by
commit 951514dd7d. The self-closing tag
syntax is clearer, more consistent, simpler to parse, compatible with
XML, preferred by Prettier, and (most importantly now) required by
FormatJS.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
We now forbid tags of the form `<foo ... />` in most
places, and we also forbid it even for several void
tags.
We make exceptions for tags that are already formatted
in two different ways in our codebase. This is mostly
svg tags, plus these common cases:
- br
- hr
- img
- input
It would be nice to lock down a convention for these,
even though the HTML specification is unopinionated
on these. We'll probably want to stay flexible for
svg tags, since they are sometimes copy/pasted from
other sources (although it's probably rare enough for
them that we can tolerate just doing minor edits as
needed).
We make some specific cases of tags use 2 space indents.
The case description:
* A tag with opening tag spread over multiple lines and closing tag
on the same line as of the closing angle bracket of the opening tag.
* A tag with opening tag spread over multiple lines and closing tag
not on the same line as of the closing angle bracket of the opening
tag.
Example:
Case 1:
Not linted:
<button type="button"
class="btn btn-primary btn-small">{{t "Yes" }}</button>
After linting:
<button type="button"
class="btn btn-primary btn-small">{{t "Yes" }}</button>
Case 2:
Before linting:
<div class = "foo"
id = "bar"
role = "whatever">
{{ bla }}
</div>
After linting:
<div class = "foo"
id = "bar"
role = "whatever">
{{ bla }}
</div>
Tweaked by tabbott to not remove it from lister.py, linter_lib, and
friends, since those are intended to support both Python 2 and 3
(we're planning to extract them from the repository).
In this commit we add the ability of recognizing comments in
handlebar and Jinja2 templates to the template parser. This
fixes issue of template parser picking up code tags which are
commented out in files.
Also we fix the problem of too much deep nesting in the Jinja2
logic statement. Now only nested Jinja2 logic statements will get
a deeper indentation level.With this another fix was introduced
relating with the tags before a nested handlebar or django tag getting
wrong indent.
We also fix the issue with wrong offsets with closing tags in
cases if they were not matching indent level of the starting
tag intially.
Also we also start to ignore any tags occuring in between 'pre'
tags for deeper indent levels. As well we start to filter out django
non block tags from getting deeper indent level.
In this commit we are modifying pretty print tool to support
Django and html singleton tags. For Addition of html singleton
tags template parser was modified to emit psudeo
html singleton end tags to accompany html singleton tags and
token class was updated to have line_span field.
In This commit we extend the work being done by @showell in PR#1778
to develop a tool to pretty print html and our handlebar templates
in order to enforce our style convention of 4 Space indentation in
templates.
This commit introduces following changes:
* Fix Py3 Compatibility.
* Add ability to prettify in cases when html tags are not the
starting of a line and addition of test cases for it.
* Add ability to lint handlebar tags and add test cases for it.
* Add {{else}} as special case of indent.
* Add test cases in general to testing new tool.
@showell Helped me throughout and reviewed this commit.
Fixes#1778
Anders Kaseorg
Tim Abbott
Aman Agrawal
Steve Howell
Sahil Batra
Steve Howell
Anders Kaseorg
Aditya Bansal
rht