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JuliaLang / julia / #37458

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#37458

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generalize insert-backedges to insert in any world (#48785)

Rather than a binary valid/not-valid, we track the exact later world
that deleted it, relative to when we first assumed it may be valid.

71780 of 82366 relevant lines covered (87.15%)

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38.38
/stdlib/Markdown/src/render/html.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
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include("rich.jl")
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# Utils
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function withtag(f, io::IO, tag, attrs...)
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    print(io, "<$tag")
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    for (attr, value) in attrs
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        print(io, " ")
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        htmlesc(io, attr)
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        print(io, "=\"")
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        htmlesc(io, value)
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        print(io, "\"")
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    end
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    f === nothing && return print(io, " />")
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    print(io, ">")
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    f()
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    print(io, "</$tag>")
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end
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tag(io::IO, tag, attrs...) = withtag(nothing, io, tag, attrs...)
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const _htmlescape_chars = Dict('<'=>"&lt;",   '>'=>"&gt;",
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                               '"'=>"&quot;", '&'=>"&amp;",
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                               # ' '=>"&nbsp;",
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                               )
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for ch in "'`!\$%()=+{}[]"
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    _htmlescape_chars[ch] = "&#$(Int(ch));"
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end
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function htmlesc(io::IO, s::AbstractString)
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    # s1 = replace(s, r"&(?!(\w+|\#\d+);)" => "&amp;")
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    for ch in s
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        print(io, get(_htmlescape_chars, ch, ch))
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    end
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end
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function htmlesc(io::IO, s::Symbol)
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    htmlesc(io, string(s))
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end
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function htmlesc(io::IO, xs::Union{AbstractString,Symbol}...)
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    for s in xs
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        htmlesc(io, s)
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    end
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end
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function htmlesc(s::Union{AbstractString,Symbol})
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    sprint(htmlesc, s)
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end
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# Block elements
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function html(io::IO, content::Vector)
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    for md in content
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        html(io, md)
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        println(io)
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    end
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end
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html(io::IO, md::MD) = html(io, md.content)
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function html(io::IO, header::Header{l}) where l
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    withtag(io, "h$l") do
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        htmlinline(io, header.text)
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    end
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end
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function html(io::IO, code::Code)
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    withtag(io, :pre) do
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        maybe_lang = !isempty(code.language) ? Any[:class=>"language-$(code.language)"] : []
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        withtag(io, :code, maybe_lang...) do
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            htmlesc(io, code.code)
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            # TODO should print newline if this is longer than one line ?
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        end
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    end
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end
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function html(io::IO, md::Paragraph)
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    withtag(io, :p) do
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        htmlinline(io, md.content)
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    end
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end
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function html(io::IO, md::BlockQuote)
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    withtag(io, :blockquote) do
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        println(io)
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        html(io, md.content)
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    end
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end
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function html(io::IO, f::Footnote)
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    withtag(io, :div, :class => "footnote", :id => "footnote-$(f.id)") do
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        withtag(io, :p, :class => "footnote-title") do
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            print(io, f.id)
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        end
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        html(io, f.text)
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    end
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end
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function html(io::IO, md::Admonition)
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    withtag(io, :div, :class => "admonition $(md.category)") do
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        withtag(io, :p, :class => "admonition-title") do
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            print(io, md.title)
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        end
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        html(io, md.content)
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    end
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end
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function html(io::IO, md::List)
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    maybe_attr = md.ordered > 1 ? Any[:start => string(md.ordered)] : []
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    withtag(io, isordered(md) ? :ol : :ul, maybe_attr...) do
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        for item in md.items
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            println(io)
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            withtag(io, :li) do
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                html(io, item)
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            end
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        end
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        println(io)
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    end
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end
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function html(io::IO, md::HorizontalRule)
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    tag(io, :hr)
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end
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html(io::IO, x) = tohtml(io, x)
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# Inline elements
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function htmlinline(io::IO, content::Vector)
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    for x in content
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        htmlinline(io, x)
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    end
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end
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function htmlinline(io::IO, code::Code)
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    withtag(io, :code) do
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        htmlesc(io, code.code)
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    end
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end
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function htmlinline(io::IO, md::Union{Symbol,AbstractString})
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    htmlesc(io, md)
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end
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function htmlinline(io::IO, md::Bold)
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    withtag(io, :strong) do
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        htmlinline(io, md.text)
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    end
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end
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function htmlinline(io::IO, md::Italic)
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    withtag(io, :em) do
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        htmlinline(io, md.text)
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    end
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end
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function htmlinline(io::IO, md::Image)
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    tag(io, :img, :src=>md.url, :alt=>md.alt)
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end
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function htmlinline(io::IO, f::Footnote)
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    withtag(io, :a, :href => "#footnote-$(f.id)", :class => "footnote") do
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        print(io, "[", f.id, "]")
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    end
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end
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function htmlinline(io::IO, link::Link)
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    withtag(io, :a, :href=>link.url) do
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        htmlinline(io, link.text)
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    end
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end
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function htmlinline(io::IO, br::LineBreak)
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    tag(io, :br)
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end
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htmlinline(io::IO, x) = tohtml(io, x)
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# API
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export html
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html(md) = sprint(html, md)
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function show(io::IO, ::MIME"text/html", md::MD)
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    withtag(io, :div, :class=>"markdown") do
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        html(io, md)
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    end
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end
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