Adjust to change of annotations type in Base

By popular demand, the type of an annotation is changing from a
Tuple{UnitRange{Int}, Pair{Symbol, Any}} to a
NamedTuple{(:region, :label, :value), Tuple{UnitRange{Int}, Symbol,
Any}}.

This necessitates some adjustments in the StyledStrings codebase.

docs/src/index.md

@@ -68,7 +68,7 @@ When concatenating a [`AnnotatedString`](@ref Base.AnnotatedString), take care t
 to keep the string annotations.
 
 ```jldoctest
-julia> str = AnnotatedString("hello there", [(1:5, :word => :greeting), (7:11, :label => 1)])
+julia> str = AnnotatedString("hello there", [(1:5, :word, :greeting), (7:11, :label, 1)])
 "hello there"
 
 julia> length(str)
@@ -80,7 +80,7 @@ julia> lpad(str, 14)
 julia> typeof(lpad(str, 7))
 AnnotatedString{String}
 
-julia> str2 = AnnotatedString(" julia", [(2:6, :face => :magenta)])
+julia> str2 = AnnotatedString(" julia", [(2:6, :face, :magenta)])
 " julia"
 
 julia> annotatedstring(str, str2)
@@ -206,7 +206,7 @@ them to the properties list afterwards, or use the convenient [Styled String
 literals](@ref stdlib-styledstring-literals).
 
 ```@repl demo
-str1 = AnnotatedString("blue text", [(1:9, :face => :blue)])
+str1 = AnnotatedString("blue text", [(1:9, :face, :blue)])
 str2 = styled"{blue:blue text}"
 str1 == str2
 sprint(print, str1, context = :color => true)

src/faces.jl

@@ -187,7 +187,7 @@ function Base.show(io::IO, ::MIME"text/plain", color::SimpleColor)
     skiptype || show(io, SimpleColor)
     skiptype || print(io, '(')
     if get(io, :color, false)::Bool
-        print(io, AnnotatedString("■", [(1:1, :face => Face(foreground=color))]), ' ')
+        print(io, AnnotatedString("■", [(region=1:1, label=:face, value=Face(foreground=color))]), ' ')
     end
     if color.value isa RGBTuple
         (; r, g, b) = color.value
@@ -222,7 +222,7 @@ function Base.show(io::IO, ::MIME"text/plain", face::Face)
         show(io, Face)
         if get(io, :color, false)::Bool
             # Could do styled"({$face:sample})", but S_str isn't defined yet
-            print(io, AnnotatedString("(sample)", [(2:7, :face => face)]))
+            print(io, AnnotatedString("(sample)", [(region=2:7, label=:face, value=face)]))
         # elseif get(io, :limit, false)::Bool
         #     print(io, "(…)")
         else
@@ -244,7 +244,7 @@ function Base.show(io::IO, ::MIME"text/plain", face::Face)
         end
     else
         show(io, Face)
-        print(io, AnnotatedString(" (sample)", [(3:8, :face => face)]))
+        print(io, AnnotatedString(" (sample)", [(region=3:8, label=:face, value=face)]))
         showcolor(io, color) = show(IOContext(io, :typeinfo => SimpleColor),
                                     MIME("text/plain"), color)
         setfields = Pair{Symbol, Any}[]
@@ -286,7 +286,7 @@ function Base.show(io::IO, ::MIME"text/plain", face::Face)
             isfirst = true
             for iface in face.inherit
                 if isfirst; isfirst = false else print(io, ", ") end
-                print(io, iface, '(', AnnotatedString("*", [(1:1, :face => iface)]), ')')
+                print(io, iface, '(', AnnotatedString("*", [(region=1:1, label=:face, value=iface)]), ')')
             end
         end
     end
@@ -555,12 +555,12 @@ function getface(faces)
 end
 
 """
-    getface(annotations::Vector{Pair{Symbol, Any}})
+    getface(annotations::Vector{@NamedTuple{label::Symbol, value::Any}})
 
 Combine all of the `:face` annotations with `getfaces`.
 """
-function getface(annotations::Vector{Pair{Symbol, Any}})
-    faces = (last(annot) for annot in annotations if first(annot) === :face)
+function getface(annotations::Vector{@NamedTuple{label::Symbol, value::Any}})
+    faces = (ann.value for ann in annotations if ann.label === :face)
     getface(faces)
 end
 
@@ -599,11 +599,11 @@ Apply `face` to `str`, along `range` if specified or the whole of `str`.
 """
 face!(s::Union{<:AnnotatedString, <:SubString{<:AnnotatedString}},
       range::UnitRange{Int}, face::Union{Symbol, Face, <:Vector{<:Union{Symbol, Face}}}) =
-          annotate!(s, range, :face => face)
+          annotate!(s, range, :face, face)
 
 face!(s::Union{<:AnnotatedString, <:SubString{<:AnnotatedString}},
       face::Union{Symbol, Face, <:Vector{<:Union{Symbol, Face}}}) =
-          annotate!(s, firstindex(s):lastindex(s), :face => face)
+          annotate!(s, firstindex(s):lastindex(s), :face, face)
 
 ## Reading face definitions from a dictionary ##
 

src/io.jl

@@ -287,7 +287,10 @@ function Base.show(io::IO, c::AnnotatedChar)
     if get(io, :color, false) == true
         out = IOBuffer()
         show(out, c.char)
-        print(io, ''', AnnotatedString(String(take!(out)[2:end-1]), map(a -> (1:ncodeunits(c), a), c.annotations)), ''')
+        cstr = AnnotatedString(
+            String(take!(out)[2:end-1]),
+            [(1:ncodeunits(c), a...) for a in c.annotations])
+        print(io, ''', cstr, ''')
     else
         show(io, c.char)
     end

src/regioniterator.jl

@@ -3,7 +3,7 @@
 struct RegionIterator{S <: AbstractString}
     str::S
     regions::Vector{UnitRange{Int}}
-    annotations::Vector{Vector{Pair{Symbol, Any}}}
+    annotations::Vector{Vector{@NamedTuple{label::Symbol, value::Any}}}
 end
 
 Base.length(si::RegionIterator) = length(si.regions)
@@ -15,35 +15,36 @@ Base.@propagate_inbounds function Base.iterate(si::RegionIterator, i::Integer=1)
 end
 
 Base.eltype(::RegionIterator{S}) where { S <: AbstractString} =
-    Tuple{SubString{S}, Vector{Pair{Symbol, Any}}}
+    Tuple{SubString{S}, Vector{@NamedTuple{label::Symbol, value::Any}}}
 
 """
     eachregion(s::AnnotatedString{S})
     eachregion(s::SubString{AnnotatedString{S}})
 
 Identify the contiguous substrings of `s` with a constant annotations, and return
 an iterator which provides each substring and the applicable annotations as a
-`Tuple{SubString{S}, Vector{Pair{Symbol, Any}}}`.
+`Tuple{SubString{S}, Vector{@NamedTuple{label::Symbol, value::Any}}}`.
 
 # Examples
 
 ```jldoctest
 julia> collect(StyledStrings.eachregion(AnnotatedString(
-           "hey there", [(1:3, :face => :bold), (5:9, :face => :italic)])))
-3-element Vector{Tuple{SubString{String}, Vector{Pair{Symbol, Any}}}}:
- ("hey", [:face => :bold])
+           "hey there", [(1:3, :face, :bold), (5:9, :face, :italic)])))
+3-element Vector{Tuple{SubString{String}, Vector{@NamedTuple{label::Symbol, value}}}}:
+ ("hey", [@NamedTuple{label::Symbol, value}((:face, :bold))])
  (" ", [])
- ("there", [:face => :italic])
+ ("there", [@NamedTuple{label::Symbol, value}((:face, :italic))])
 ```
 """
 function eachregion(s::AnnotatedString, subregion::UnitRange{Int}=firstindex(s):lastindex(s))
     isempty(s) || isempty(subregion) &&
-        return RegionIterator(s.string, UnitRange{Int}[], Vector{Pair{Symbol, Any}}[])
+        return RegionIterator(s.string, UnitRange{Int}[], Vector{@NamedTuple{label::Symbol, value::Any}}[])
     events = annotation_events(s, subregion)
-    isempty(events) && return RegionIterator(s.string, [subregion], [Pair{Symbol, Any}[]])
-    annotvals = last.(annotations(s))
+    isempty(events) && return RegionIterator(s.string, [subregion], [@NamedTuple{label::Symbol, value::Any}[]])
+    annotvals = @NamedTuple{label::Symbol, value::Any}[
+        (; label, value) for (; label, value) in annotations(s)]
     regions = Vector{UnitRange{Int}}()
-    annots = Vector{Vector{Pair{Symbol, Any}}}()
+    annots = Vector{Vector{@NamedTuple{label::Symbol, value::Any}}}()
     pos = first(events).pos
     if pos > first(subregion)
         push!(regions, thisind(s, first(subregion)):prevind(s, pos))
@@ -71,14 +72,14 @@ end
 
 function eachregion(s::SubString{<:AnnotatedString}, pos::UnitRange{Int}=firstindex(s):lastindex(s))
     if isempty(s)
-        RegionIterator(s.string, Vector{UnitRange{Int}}(), Vector{Vector{Pair{Symbol, Any}}}())
+        RegionIterator(s.string, Vector{UnitRange{Int}}(), Vector{Vector{@NamedTuple{label::Symbol, value::Any}}}())
     else
         eachregion(s.string, first(pos)+s.offset:last(pos)+s.offset)
     end
 end
 
 """
-    annotation_events(string::AbstractString, annots::Vector{Tuple{UnitRange{Int}, Pair{Symbol, Any}}}, subregion::UnitRange{Int})
+    annotation_events(string::AbstractString, annots::Vector{@NamedTuple{region::UnitRange{Int}, label::Symbol, value::Any}}, subregion::UnitRange{Int})
     annotation_events(string::AnnotatedString, subregion::UnitRange{Int})
 
 Find all annotation "change events" that occur within a `subregion` of `annots`,
@@ -89,9 +90,9 @@ index::Int}` where `pos` is the position of the event, `active` is a boolean
 indicating whether the annotation is being activated or deactivated, and `index`
 is the index of the annotation in question.
 """
-function annotation_events(s::AbstractString, annots::Vector{Tuple{UnitRange{Int}, Pair{Symbol, Any}}}, subregion::UnitRange{Int})
+function annotation_events(s::AbstractString, annots::Vector{@NamedTuple{region::UnitRange{Int}, label::Symbol, value::Any}}, subregion::UnitRange{Int})
     events = Vector{NamedTuple{(:pos, :active, :index), Tuple{Int, Bool, Int}}}() # Position, Active?, Annotation index
-    for (i, (region, _)) in enumerate(annots)
+    for (i, (; region)) in enumerate(annots)
         if !isempty(intersect(subregion, region))
             start, stop = max(first(subregion), first(region)), min(last(subregion), last(region))
             start <= stop || continue # Currently can't handle empty regions