Extracted this out of #5649
This commit was created with the following commands:
```
find . -iname "*.webidl" -type f -print0 | xargs -0 sed -i '' 's/http:\(.*\)whatwg.org/https:\1whatwg.org/g'
```
```
find . -iname "*.rs" -type f -print0 | xargs -0 sed -i '' 's/http:\(.*\)whatwg.org/https:\1whatwg.org/g'
```
Source-Repo: https://github.com/servo/servo
Source-Revision: 4997d3a112354a407365fede1ab1944834a2e13c
I'm unsure whether I should wrap 'placeholder' in Cell, or DomRefCell, or leave as it is now.
Also, the spec says that the placeholder should be presented with line breaks stripped off,
should it be done in this stage?
Source-Repo: https://github.com/servo/servo
Source-Revision: 4ffeb81aa73fa87120eabb569fd14d7193813bdf
We can reset `<input type=text>` fields! I wish I could've done something with checkboxes, but unfortunately, that's it for now.
In addition to that, this PR implements `HTMLInputAttribute.defaultValue`, updates wpt-test to expect passing tests as a result of that implementation, and fixes an index error crash with text inputs.
edit: also includes an html example where one may lazily watch form resets in action: ` tests/html/form_reset_handsfree.html`
Source-Repo: https://github.com/servo/servo
Source-Revision: 5951056973fc0e08e70224214740a274ca8ef20f
Still need to impl `Activatable` on all activatable elements. I'll probably push those changes to this PR, however they can be made separately as well.
Source-Repo: https://github.com/servo/servo
Source-Revision: 19c69b1625dda46d3c5501292e7e2d0328e400b4
This is missing a lot of parts, so it doesn't really make any real-world form submission work yet. It provides a skeleton on which the missing bits can be filled in.
What works:
- `<input>` elements except for `type=file`
- GET/POST methods
- URLencoded `enctype`s (default)
- Submission via `<form>.submit()` only
Stuff that needs to be done for most simple real-world cases to work:
- [Working text input](https://github.com/servo/servo/pull/3585)
- Click handlers for `<submit>`
- Possibly `<textarea>` support
- Support for the other two enctypes (#3649)
Todo:
- Correctly implement [planned navigation](https://html.spec.whatwg.org/multipage/forms.html#planned-navigation) using `TrustedFormAddress` (#3648)
- [Correctly implement form owners.](https://github.com/servo/servo/issues/3553) Requires html5ever and some discussion of the spec.
- `<input type=file>` support
- Image submit support
- Browsing contexts/targets
- Support for non-`<input>` controls
- Validation (?)
- Dirname (?)
Source-Repo: https://github.com/servo/servo
Source-Revision: 9dfd5e7fcd2011a411b219e8c45aadc0ecb270bd
So far the changes to layout seem fairly well-contained; I think this is worth integrating to give us a browser that is easier to dogfood (and allows us to work on things like form submission much easier), especially since the long-term viability of WebComponents-as-forms is not assured.
Source-Repo: https://github.com/servo/servo
Source-Revision: f80096069592b864221abe112eaf2ecb6c444fda
