Implement CanvasRenderingContext2d.fillText
The PR consists of broadly two main changes:
- Implementation of Canvas2dRenderingContext.font
- Basic implementation of Canvas2dRenderingContext.fillText
Although I am not fully sure about the long term goals for the canvas backend in Servo, I assumed limited scope for font and text handling (should support simple text drawing with font selection) in the current implementation as I believe a more complete implementation would eventually be brought in as a part of #22957.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#11681
- [x] There are tests for these changes
Don't panic in canvas thread if webrender isn't reachable
This fixes a regression from #26823. This method is only used by the css paint worklet API, and the caller handles a communication error on the channel correctly.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#26853
- [x] There are tests for these changes
Use the writing mode of the containing block when accessing CSS properties
… and converting them to flow-relative geometric values.
These values are almost always used to size and position a fragment within its containing block, so using the mode of the containing block seems more correct.
Note that the `writing-mode` and `direction` properties are disabled in Servo at the moment, so this PR by itself should have no effect: the writing mode of an element is always the same of that of its containing block since they’re both horizontal rtl.
Include animations and transitions in the cascade
Instead of applying animations and transitions to styled elements,
include them in the cascade. This allows them to interact properly with
things like font-size and !important rules.
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… and converting them to flow-relative geometric values.
These values are almost always used to size and position a fragment within its containing block, so using the mode of the containing block seems more correct.
Note that the `writing-mode` and `direction` properties are disabled in Servo at the moment, so this PR by itself should have no effect: the writing mode of an element is always the same of that of its containing block since they’re both horizontal rtl.
Store abspos boxes in a RefCell too
We want to mutate them when lazily computing their content sizes, but they
are behind an Arc for the hoisting infra, so it also needs its own layer
of inner mutability.
Add UI for bypassing SSL handshake failures
There are several parts to these changes:
1. resurrecting the network error classification code to distinguish between SSL failures and other network errors
1. adding an SSL verification callback to support verifying certs against a list that can change at runtime, rather than just at program initialization
1. exposing a privileged chrome://allowcert URI which accepts the PEM cert contents along with a secret token
1. extracting the PEM cert contents out of the network layer when a handshake failure occurs, and getting them into the HTML that is parsed when an SSL failure occurs
1. adding a button in the handshake failure page that performs an XHR to chrome://allowcert with knowledge of the secret token and the PEM cert contents, before reloading the original URL that failed
The presence of the secret token means that while the chrome://allowcert URL is currently visible to web content, they cannot make use of it to inject arbitrary certs into the verification process.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#26683
- [x] These changes do not require tests because the UI requires user activation and can't clearly be automated
Update webrender
These changes reflect changes in webrender's API that make RenderApiSender and RenderApi objects more challenging to share. This PR moves us to a model where:
* the compositor owns the main RenderApi object
* other threads that need to create transactions or manipulate fonts proxy those operations to the compositor (script/layout use IPC, while other threads use non-IPC channels)
* the webgl thread owns its own independent RenderApi
Don't create empty stacking contexts in display lists
A recent change to euclid exposed that our display lists can contain Rects that contain NaN values. These NaNs originate from creating stacking contexts with transforms that scale the horizontal or vertical dimensions to 0. WebRender isn't prepared to handle these, so we need to not produce these empty stacking contexts when building the display list.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#26592 and fix#26590
- [x] There are tests for these changes
Update XHR send to use XMLHttpRequestBodyInit
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FIX#26723
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We want to mutate them when lazily computing their content sizes, but they
are behind an Arc for the hoisting infra, so it also needs its own layer
of inner mutability.
We want to compute content sizes on demand rather than eagerly so we will
need to mutate the independent formatting contexts that own the content sizes.
Instead of applying animations and transitions to styled elements,
include them in the cascade. This allows them to interact properly with
things like font-size and !important rules.
layout_2020: Tag fragments with their pseudo content type
This will allow us to answer queries and properly handle animations in
the future for fragments generated for pseudo content.
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- [x] There are tests for these changes
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