Our environment records are currently weird in that they inherit from
Object, but don't have a connection to the global object.
I'd like to remove this inheritance, and the first step is giving them
their own pointer to the global object.
This patch adds the concept of variable bindings to the various
environment record classes. The bindings are not yet hooked up to
anything, this is just fleshing out all the operations.
Most of this is following the spec exactly, but in a few cases we are
missing the requisite abstract operations to do the exact right thing.
I've added FIXME's in those cases where I noticed it.
For now this only allows us to single-step through execution and inspect
part of the execution environment for debugging
This also allows to run to function return and sending signals to the VM
This changes the behavior of SIGINT for UE to pause execution and then
terminate if already paused
A way of setting a watchpoint for a function would be a good addition in
the future, the scaffold for this is already present, we only need to
figure out a way to find the address of a function
On a side note I have changed all occurences of west-const to east const
Steps to reproduce:
1. Start TextEditor and make some changes to the document.
2. Try to open an existing file.
3. When prompted choose to save the changes to the existing document.
4. Close the file picker by clicking 'Cancel'.
5. Note how the file was opened anyway and your changes were lost.
Same applies to the 'New File' action.
There's no point in saving the file - and potentially having to ask the
user for a file name - if the user abandons the 'Open' action by
clicking 'Cancel' in the file picker. This now also matches TextEditor's
behavior.
This makes sure to ask the user whether they want to save changes to
their current document when opening a file even if the document has
never been saved before.
The parser doesn't always track lexical scopes correctly, so let's not
rely on that for direct argument loading.
This reverts the LoadArguments bytecode instruction as well. We can
bring these things back when the parser can reliably tell us that
a given Identifier is indeed a function argument.
This was accidentally deleting a property from the object record object
itself, rather than from the object record.
It's quite confusing that Environment Records are objects, but moving
away from that will require some large changes.
In get_own_properties:
Entries which are deleted while iterating need to be skipped
In PropertyDescriptor::from_dictionary
If the getter/setter is undefined it should still mark it as present
This was missing step 3 from the spec:
3. If Type(O) is not Object, return O.
Also use RequireObjectCoercible() for a better error message and make
the rest of the code a bit easier to read and more similar to the spec
text.
These represent the outermost scope in the environment record
hierarchy. The spec says they should be a "composite" of two things:
- An ObjectEnvironmentRecord wrapping the global object
- A DeclarativeEnvironmentRecord for other declarations
It's not yet clear to me how this should work, so this patch only
implements the first part, an object record wrapping the global object.
To better follow the spec, we need to distinguish between the current
execution context's lexical environment and variable environment.
This patch moves us to having two record pointers, although both of
them point at the same environment records for now.
This patch adds FunctionEnvironmentRecord as a subclass of the existing
DeclarativeEnvironmentRecord. Things that are specific to function
environment records move into there, simplifying the base.
Most of the abstract operations related to function environment records
are rewritten to match the spec exactly. I also had to implement
GetThisEnvironment() and GetSuperConstructor() to keep tests working
after the changes, so that's nice as well. :^)
This is so they can find their associated resources and it's
the same behavior as in Lagom.
This also required changing some tests so that they could
write their resources in a writable location.
If we consumed whitespace and/or comments after a RegexLiteral token,
the following token must not be RegexFlags - no whitespace or comments
are allowed between the closing / and the flag characters.
Fixes#8201.
This fixes#8133.
Ext2FSInode::remove_child() searches the lookup cache, so if it's not
initialized, removing the child fails. If the child was a directory,
this led to it being corrupted and having 0 children.
I also added populate_lookup_cache to add_child. I hadn't seen any
bugs there, but if the cache wasn't populated before, adding that
one entry would make it think it was populated, so that would cause
bugs later.
This replaces the naive copy algorithm that only supported rectangular
and 100% opaque selections with a more general approach that supports
any shape and alpha value.
Note that we now make a brand new bitmap with a hardcoded format instead
of just cropping the layer's existing bitmap. This is done to ensure
that the final clipboard image will have an alpha channel.
A "feather" value sets by how much the borders of the selection will be
smoothed, and a "mode" value sets how the newly selected region will
interact with an existing image selection (if any).
The Mask class represents an opacity mask over a rectangular section
of an image, linking every pixel to an alpha value ranging from 0 (not
selected) to 255 (fully selected). "Partially selected" pixels can be
used to simulate anti-aliased curves.
This class will be used as the basis for the new non-rectangular
selection feature.
