Fix LaTeXStrings support for UnicodePlots and InspectDR (#3879)

* fix LaTeXStrings support for UnicodePlots and InspectDR

* rename & fix

Project.toml

@@ -31,6 +31,7 @@ Showoff = "992d4aef-0814-514b-bc4d-f2e9a6c4116f"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
+UnicodeFun = "1cfade01-22cf-5700-b092-accc4b62d6e1"
 UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
 [compat]
@@ -52,6 +53,7 @@ Requires = "1"
 Scratch = "1"
 Showoff = "0.3.1, 1.0"
 StatsBase = "0.32 - 0.33"
+UnicodeFun = "0.4"
 UnicodePlots = "2.4"
 julia = "1.5"
 

src/Plots.jl

@@ -29,9 +29,10 @@ import RecipesBase: plot, plot!, animate, is_explicit
 using Base.Meta
 @reexport using PlotUtils
 @reexport using PlotThemes
-import Showoff
+import UnicodeFun
 import StatsBase
 import Downloads
+import Showoff
 import JSON
 
 using Requires

src/backends/inspectdr.jl

@@ -70,7 +70,7 @@ function _inspectdr_add_annotations(plot, x, y, val::PlotText)
         color = _inspectdr_mapcolor(val.font.color),
     )
     ann = InspectDR.atext(
-        val.str,
+        texmath2unicode(val.str),
         x = x,
         y = y,
         font = fnt,
@@ -384,9 +384,9 @@ function _inspectdr_setupsubplot(sp::Subplot{InspectDRBackend})
     _inspectdr_setticks(sp, plot, strip, xaxis, yaxis)
 
     a = plot.annotation
-    a.title = sp[:title]
-    a.xlabel = xaxis[:guide]
-    a.ylabels = [yaxis[:guide]]
+    a.title = texmath2unicode(sp[:title])
+    a.xlabel = texmath2unicode(xaxis[:guide])
+    a.ylabels = [texmath2unicode(yaxis[:guide])]
 
     #Modify base layout of new object:
     l = plot.layout.defaults = deepcopy(InspectDR.defaults.plotlayout)

src/backends/unicodeplots.jl

@@ -42,9 +42,9 @@ function unicodeplots_rebuild(plt::Plot{UnicodePlotsBackend})
 
         kw = (
             compact = true,
-            title = sp[:title],
-            xlabel = xaxis[:guide],
-            ylabel = yaxis[:guide],
+            title = texmath2unicode(sp[:title]),
+            xlabel = texmath2unicode(xaxis[:guide]),
+            ylabel = texmath2unicode(yaxis[:guide]),
             xscale = xaxis[:scale],
             yscale = yaxis[:scale],
             border = isijulia() ? :ascii : :solid,
@@ -63,7 +63,7 @@ function unicodeplots_rebuild(plt::Plot{UnicodePlotsBackend})
                 o,
                 x,
                 y,
-                val.str;
+                texmath2unicode(val.str);
                 color = up_color(val.font.color),
                 halign = val.font.halign,
                 valign = val.font.valign,

src/utils.jl

@@ -1221,6 +1221,7 @@ function mesh3d_triangles(x, y, z, cns::Tuple{Array,Array,Array})
     end
     return X, Y, Z
 end
+
 function mesh3d_triangles(x, y, z, cns::AbstractVector{NTuple{3,Int}})
     X = zeros(eltype(x), 4length(cns))
     Y = zeros(eltype(y), 4length(cns))
@@ -1251,3 +1252,5 @@ const _attrsymbolcache = Dict{Symbol,Dict{Symbol,Symbol}}()
 
 get_attr_symbol(letter::Symbol, keyword::String) = get_attr_symbol(letter, Symbol(keyword))
 get_attr_symbol(letter::Symbol, keyword::Symbol) = _attrsymbolcache[letter][keyword]
+
+texmath2unicode(s::AbstractString, pat=r"\$([^$]+)\$") = replace(s, pat => m->UnicodeFun.to_latex(m[2:(length(m)-1)]))

test/runtests.jl

@@ -199,6 +199,11 @@ end
     @test Plots.process_clims(nothing) ==
           Plots.process_clims(missing) ==
           Plots.process_clims(:auto)
+
+    @test (==)(
+        Plots.texmath2unicode(raw"Equation $y = \alpha \cdot x + \beta$ and eqn $y = \sin(x)^2$"),
+        raw"Equation y = α ⋅ x + β and eqn y = sin(x)²"
+    )
 end
 
 @testset "Backends" begin