To support editing of large files it is an advantage to not load the
entire file into memory but only load whatever is needed for display at
the moment. To make it work, file access is abstracted into a socalled
HexDocument, of which there two: a memory based and a file based one.
The former can be used for newly created documents, the latter for file
based editing.
Hex documents now do track changes instead of the HexEditor. HexEditor
only sets new values. This frees HexEditor of some responsibility.
For better visibility of wether the editing focus is on the hex or the
ascii view, render a blinking caret instead of a solid cell background.
For that to work, it's also necessary to change the way selection works.
The selection shouldn't extend to the current position but up to the
byte before it.
find_and_highlight() selected +1 too many bytes.
'Select All' selected +1 too many bytes past the end of
the buffer.
Status bar 'Selected Bytes' count was off by -1 when more
than zero bytes were selected.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
This API was a mostly gratuitous deviation from POSIX that gave up some
portability in exchange for avoiding the occasional strlen().
I don't think that was actually achieving anything valuable, so let's
just chill out and have the same open() API as everyone else. :^)
