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Add AnnotatedString display interface (eliminate StyledStrings type-piracy) #56194
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Add AnnotatedString display interface (eliminate StyledStrings type-piracy) #56194
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Excising part of #56194 on the way to reviving that PR.
This is required for downstream libraries (esp. StyledStrings) to be able to influence the display of an AnnotatedString without type-piracy. The idea here is to provide an `iterate`-like display protocol that passes style information into the implementing library, which takes that information (and a "state" from the last display update), and decides how it needs to update the output to render the string. Since AnnotatedStrings don't have a distinguished "owner" or "type" (only their annotations have types), this leads to corner cases where the "laststate" you receive might be from another library. In that case, it's the responsibility of the downstream renderer to discard the laststate information and "reset" the display state as needed.
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end | ||
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function show(io::IO, ::MIME"text/html", s::Union{<:AnnotatedString, SubString{<:AnnotatedString}}) | ||
htmlescape(str) = replace(str, '&' => "&", '<' => "<", '>' => ">") |
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This seems incomplete, since the commonly given list is &, <, ', ", \0
https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html#output-encoding-rules-summary
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After discussion with Cody, this is an attempt at a more minimal version of #56194. The intent is to work around the invalidation issue introduced by the split design with AnnotatedStrings, resolving the headache for 1.12. Paired with JuliaLang/StyledStrings.jl#115 Many thanks to @topolarity for working out this approach, the discussion on balancing the short/long term fixes for this issue. ------ From my understanding of the problem, this should fix the `write`/`print`/`show` invalidations, but this needs to be checked. --------- Co-authored-by: Cody Tapscott <[email protected]>
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After discussion with Cody, this is an attempt at a more minimal version of #56194. The intent is to work around the invalidation issue introduced by the split design with AnnotatedStrings, resolving the headache for 1.12. Paired with JuliaLang/StyledStrings.jl#115 Many thanks to @topolarity for working out this approach, the discussion on balancing the short/long term fixes for this issue. ------ From my understanding of the problem, this should fix the `write`/`print`/`show` invalidations, but this needs to be checked. --------- Co-authored-by: Cody Tapscott <[email protected]> (cherry picked from commit 6d78a4a)
LebedevRI
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After discussion with Cody, this is an attempt at a more minimal version of JuliaLang#56194. The intent is to work around the invalidation issue introduced by the split design with AnnotatedStrings, resolving the headache for 1.12. Paired with JuliaLang/StyledStrings.jl#115 Many thanks to @topolarity for working out this approach, the discussion on balancing the short/long term fixes for this issue. ------ From my understanding of the problem, this should fix the `write`/`print`/`show` invalidations, but this needs to be checked. --------- Co-authored-by: Cody Tapscott <[email protected]>
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This implements a "rendering interface" for AnnotatedString, allowing StyledStrings to influence printing without type-piracy.
The idea here is to provide an
iterate
-like display protocol that passes style information into the implementing library, which takes that information (and a "state" from the last display update), and decides how it needs to update the output to render the string.Since AnnotatedStrings don't have a distinguished "owner" or "type" (only their annotations have types), this means we have to handle cases where the "laststate" you receive might be from another library. In that case, it's the responsibility of the downstream renderer to discard the laststate information and "reset" the display state as needed.
Dependent on #56192, and see JuliaLang/StyledStrings.jl#100 for the StyledStrings-side changes.
This should eliminate 100% of the StyledStrings type-piracy, once implemented.