Various ticks fixes (precision, log scale) (#124)

* relax constraint on int exponent for log scales
* update CI script
* drop julia versions < 1.6 as in Plots
* add formatting action
* coding style
* reorder statements
* add type tests
* Delete appveyor.yml
* Delete REQUIRE

Co-authored-by: Simon Christ <SimonChrist@gmx.de>

.JuliaFormatter.toml

@@ -0,0 +1,12 @@
+always_for_in = true
+import_to_using = false
+align_pair_arrow = true
+align_assignment = true
+align_conditional = true
+always_use_return = false
+conditional_to_if = false
+whitespace_in_kwargs = true
+remove_extra_newlines = true
+whitespace_ops_in_indices = true
+short_to_long_function_def = false
+annotate_untyped_fields_with_any = false

.github/workflows/ci.yml

@@ -19,16 +19,18 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.0'
-          - '1'
-          - 'nightly'
+          - '1.6' # LTS
+          - '1.7' # latest stable
         os:
           - ubuntu-latest
           - windows-latest
           - macos-latest
         arch:
           - x64
-          - x86
+          # - x86
+        include:
+          - version: 'nightly'
+            os: ubuntu-latest
 
     steps:
 
@@ -55,7 +57,7 @@ jobs:
 
       # Run tests
       - name: Run Graphical test
-        run:  julia --project -e 'using Pkg; Pkg.test(coverage=true);'
+        run:  julia --project -e 'using Pkg; Pkg.test(coverage=true)'
 
       # - name: Codecov
       #   uses: julia-actions/julia-uploadcodecov@latest

.github/workflows/format_pr.yml

@@ -0,0 +1,35 @@
+name: format-pr
+
+on:
+  schedule:
+    - cron: '0 0 * * SUN'
+
+jobs:
+  build:
+    if: "!contains(github.event.head_commit.message, '[skip ci]')"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install JuliaFormatter and format
+        run: |
+          julia  -e 'using Pkg; pkg"add JuliaFormatter"'
+          julia  -e 'using JuliaFormatter; [format(["src", "test"]) for _ in 1:2]'
+          git diff --exit-code
+
+      - name: Create Pull Request
+        if: ${{ failure() }}
+        id: cpr
+        uses: peter-evans/create-pull-request@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "Format .jl files [skip ci]"
+          title: 'Automatic JuliaFormatter.jl run'
+          branch: auto-juliaformatter-pr
+          delete-branch: true
+          labels: formatting, automated pr, no changelog
+
+      - name: Check outputs
+        if: ${{ failure() }}
+        run: |
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pull-request-number }}"
+          echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"

Project.toml

@@ -1,6 +1,6 @@
 name = "PlotUtils"
 uuid = "995b91a9-d308-5afd-9ec6-746e21dbc043"
-version = "1.0.15"
+version = "1.1.0"
 
 [deps]
 ColorSchemes = "35d6a980-a343-548e-a6ea-1d62b119f2f4"
@@ -15,7 +15,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 ColorSchemes = "3.8"
 Colors = "0.12"
 Reexport = "0.2, 1.0"
-julia = "1"
+julia = "1.6"
 
 [extras]
 StableRNGs = "860ef19b-820b-49d6-a774-d7a799459cd3"

src/color_utils.jl

@@ -9,10 +9,7 @@ const _lightness_darkbg = [80.0]
 const _lightness_lightbg = [60.0]
 const _lch_c_const = [60]
 
-function adjust_lch(color, l, c)
-    lch = convert(LCHab, color)
-    convert(RGBA{Float64}, LCHab(l, c, lch.h))
-end
+adjust_lch(color, l, c) = convert(RGBA{Float64}, LCHab(l, c, convert(LCHab, color).h))
 
 function lightness_from_background(bgcolor)
     bglight = convert(LCHab, bgcolor).l
@@ -82,9 +79,7 @@ function darken(c, v=0.1)
     b = max(0, min(rgba.b - v, 1))
     RGBA(r,g,b,rgba.alpha)
 end
-function lighten(c, v=0.3)
-    darken(c, -v)
-end
+lighten(c, v=0.3) = darken(c, -v)
 
 # borrowed from http://stackoverflow.com/a/1855903:
 lightness_level(c::Colorant) = 0.299 * red(c) + 0.587 * green(c) + 0.114 * blue(c)
@@ -93,16 +88,12 @@ isdark(c::Colorant) = lightness_level(c) < 0.5
 islight(c::Colorant) = !isdark(c)
 
 
-function Base.convert(::Type{RGB}, h::Unsigned)
-    mask = 0x0000FF
-    RGB([(x & mask) / 0xFF for x in (h >> 16, h >> 8, h)]...)
-end
+Base.convert(::Type{RGB}, h::Unsigned) = RGB([(x & 0x0000FF) / 0xFF for x in (h >> 16, h >> 8, h)]...)
 
 make255(x) = round(Int, 255 * x)
 
-function rgb_string(c::Colorant)
+rgb_string(c::Colorant) = 
     @sprintf("rgb(%d, %d, %d)", make255(red(c)), make255(green(c)), make255(blue(c)))
-end
 
 function rgba_string(c::Colorant)
     @sprintf(