From 32d59fff615df6fd098ca434c9faf1e2fb16f444 Mon Sep 17 00:00:00 2001
From: Andrew Palugniok <apalugniok@icloud.com>
Date: Thu, 16 Nov 2017 22:27:13 +0000
Subject: [PATCH 1/2] Turn off scaled ticks for PGFPlots.

---
 src/backends/pgfplots.jl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/backends/pgfplots.jl b/src/backends/pgfplots.jl
index d83917d0..13f9daad 100644
--- a/src/backends/pgfplots.jl
+++ b/src/backends/pgfplots.jl
@@ -272,6 +272,9 @@ function pgf_axis(sp::Subplot, letter)
     style = []
     kw = KW()
 
+    # turn off scaled ticks
+    push!(style, "scaled $(letter) ticks = false")
+
     # set to supported framestyle
     framestyle = pgf_framestyle(sp[:framestyle])
 

From 62ca787e6e3d9076b062064a534095706b875889 Mon Sep 17 00:00:00 2001
From: Andrew Palugniok <apalugniok@icloud.com>
Date: Sat, 23 Dec 2017 00:35:44 +0000
Subject: [PATCH 2/2] Fix scientific formatter for GR and PGFPlots.

---
 src/backends/gr.jl       | 25 +++++++++++++++++++++++--
 src/backends/pgfplots.jl |  2 ++
 src/utils.jl             | 25 +++++++++++++++++++++++++
 3 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/src/backends/gr.jl b/src/backends/gr.jl
index 881c5e8d..5e2d6ed6 100644
--- a/src/backends/gr.jl
+++ b/src/backends/gr.jl
@@ -222,6 +222,13 @@ function gr_polaraxes(rmin::Real, rmax::Real, sp::Subplot)
     sinf = sind.(a)
     cosf = cosd.(a)
     rtick_values, rtick_labels = get_ticks(yaxis)
+    rtick_labels = if yaxis[:formatter] == :scientific && yaxis[:ticks] == :auto
+        rtick_labels = string.(convert_sci_unicode.(rtick_labels),"\\ ")
+        # unicode × messes up superscript alignment so add space to superscript
+        replace.(rtick_labels, "{", "{ ")
+    else
+        rtick_labels
+    end
 
     #draw angular grid
     if xaxis[:grid]
@@ -882,7 +889,14 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
                 xi, yi = GR.wctondc(cv, sp[:framestyle] == :origin ? 0 : xor(flip, mirror) ? ymax : ymin)
                 # @show cv dv ymin xi yi flip mirror (flip $ mirror)
                 # ensure correct dispatch in gr_text for automatic log ticks
-                dv = xaxis[:scale] in (:ln, :log10, :log2) && xaxis[:ticks] == :auto ? string(dv, "\\ ") : string(dv)
+                dv = if xaxis[:scale] in (:ln, :log10, :log2) && xaxis[:ticks] == :auto
+                    string(dv, "\\ ")
+                elseif xaxis[:formatter] == :scientific && xaxis[:ticks] == :auto
+                    # unicode × messes up superscript alignment so add space to superscript
+                    string(replace(convert_sci_unicode(dv), "{", "{ "), "\\ ")
+                else
+                    string(dv)
+                end
                 gr_text(xi, yi + (mirror ? 1 : -1) * 5e-3 * (xaxis[:tick_direction] == :out ? 1.5 : 1.0), dv)
             end
         end
@@ -895,7 +909,14 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
                 xi, yi = GR.wctondc(sp[:framestyle] == :origin ? 0 : xor(flip, mirror) ? xmax : xmin, cv)
                 # @show cv dv xmin xi yi
                 # ensure correct dispatch in gr_text for automatic log ticks
-                dv = yaxis[:scale] in (:ln, :log10, :log2) && yaxis[:ticks] == :auto ? string(dv, "\\ ") : string(dv)
+                dv = if yaxis[:scale] in (:ln, :log10, :log2) && yaxis[:ticks] == :auto
+                    string(dv, "\\ ")
+                elseif yaxis[:formatter] == :scientific && yaxis[:ticks] == :auto
+                    # unicode × messes up superscript alignment so add space to superscript
+                    string(replace(convert_sci_unicode(dv), "{", "{ "), "\\ ")
+                else
+                    string(dv)
+                end
                 gr_text(xi + (mirror ? 1 : -1) * 1e-2 * (yaxis[:tick_direction] == :out ? 1.5 : 1.0), yi, dv)
             end
         end
diff --git a/src/backends/pgfplots.jl b/src/backends/pgfplots.jl
index 13f9daad..db4e8b26 100644
--- a/src/backends/pgfplots.jl
+++ b/src/backends/pgfplots.jl
@@ -329,6 +329,7 @@ function pgf_axis(sp::Subplot, letter)
             push!(style, string(letter, "ticklabels = {\$", join(tick_labels,"\$,\$"), "\$}"))
         elseif axis[:showaxis]
             tick_labels = ispolar(sp) && letter == :x ? [ticks[2][3:end]..., "0", "45"] : ticks[2]
+            tick_labels = axis[:formatter] == :scientific ? string.("\$", convert_sci_unicode.(tick_labels), "\$") : tick_labels
             push!(style, string(letter, "ticklabels = {", join(tick_labels,","), "}"))
         else
             push!(style, string(letter, "ticklabels = {}"))
@@ -500,6 +501,7 @@ end
 
 function _display(plt::Plot{PGFPlotsBackend})
     # prepare the object
+    PGFPlots.pushPGFPlotsPreamble("\\usepackage{fontspec}")
     pgfplt = PGFPlots.plot(plt.o)
 
     # save an svg
diff --git a/src/utils.jl b/src/utils.jl
index 5d1222bd..3fc55a88 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -1048,3 +1048,28 @@ guidefont(ax::Axis) = font(
     ax[:guidefontrotation],
     ax[:guidefontcolor],
 )
+
+# ---------------------------------------------------------------
+# converts unicode scientific notation unsupported by pgfplots and gr
+# into a format that works 
+
+function convert_sci_unicode(label::AbstractString)
+    unicode_dict = Dict(
+    '⁰' => "0",
+    '¹' => "1",
+    '²' => "2",
+    '³' => "3",
+    '⁴' => "4",
+    '⁵' => "5",
+    '⁶' => "6",
+    '⁷' => "7",
+    '⁸' => "8",
+    '⁹' => "9",
+    '⁻' => "-",
+    "×10" => "×10^{",
+    )
+    for key in keys(unicode_dict)
+        label = replace(label, key, unicode_dict[key])
+    end
+    string(label, "}")
+end