enhance display / show

src/backends/unicodeplots.jl

@@ -188,17 +188,40 @@ end
 
 # ------------------------------------------------------------------------------------------
 Base.show(plt::Plot{UnicodePlotsBackend}) = show(stdout, plt)
-Base.show(io::IO, plt::Plot{UnicodePlotsBackend}) = _show(io, MIME("text/plain"), plt)
 
-function _show(io::IO, ::MIME"text/plain", plt::Plot{UnicodePlotsBackend})
+function Base.show(io::IO, plt::Plot{UnicodePlotsBackend})
+    prepare_output(plt)
     unicodeplots_rebuild(plt)
+    _show(io, MIME("text/plain"), plt, Val{false})  # no layout, hence vertical stacked
+end
+
+# we only support "text/plain", hence display(...) falls back to plain-text stdout
+function Base.display(::PlotsDisplay, plt::Plot)
+    prepare_output(plt)
+    unicodeplots_rebuild(plt)
+    _show(stdout, MIME("text/plain"), plt, Val{true})  # consider layout
+end
+
+function _show(io::IO, ::MIME"text/plain", plt::Plot{UnicodePlotsBackend}, ::Type{Val{false}})
+    n = length(plt.o)
+    for (i, p) in enumerate(plt.o)
+        show(io, p)
+        i < n && println(io)
+    end
+    nothing
+end
+
+function _show(io::IO, m::MIME"text/plain", plt::Plot{UnicodePlotsBackend}, ::Type{Val{true}})
     nr, nc = size(plt.layout)
+    if nr == 1 && nc == 1 # fast path
+        _show(io, m, plt, Val{false})
+    else
         lines_colored = Array{Union{Nothing,Vector{String}}}(undef, nr, nc)
         lines_uncolored = copy(lines_colored)
         l_max = zeros(Int, nr)
         w_max = zeros(Int, nc)
         buf = IOBuffer()
-    cbuf = IOContext(buf, :color => true)
+        cbuf = IOContext(buf, :color => Base.get_have_color())
         re_col = r"\x1B\[[0-9;]*[a-zA-Z]"
         sps = 0
         for r in 1:nr
@@ -237,15 +260,10 @@ function _show(io::IO, ::MIME"text/plain", plt::Plot{UnicodePlotsBackend})
                         print(io, pre, lc[n], ' '^(w_max[c] - length(lu[n])))
                     end
                 end
-            println(io)
+                n < l_max[r] && println(io)
             end
             r < nr && println(io)
         end
-    nothing
+    end
-end
-
-function _display(plt::Plot{UnicodePlotsBackend})
-    unicodeplots_rebuild(plt)
-    map(display, plt.o)
     nothing
 end