Inherit matrix printing style from the parent array (#127)

Author: jishnub

Project.toml

@@ -8,7 +8,8 @@ julia = "0.7, 1"
 [extras]
 CatIndices = "aafaddc9-749c-510e-ac4f-586e18779b91"
 DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
+LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["CatIndices", "DelimitedFiles", "Test"]
+test = ["CatIndices", "DelimitedFiles", "Test", "LinearAlgebra"]

src/OffsetArrays.jl

@@ -240,6 +240,15 @@ printindices(io::IO, ind1) = print(io, _unslice(ind1))
 _unslice(x) = x
 _unslice(x::IdentityUnitRange) = x.indices
 
+function Base.replace_in_print_matrix(A::OffsetArray{<:Any,2}, i::Integer, j::Integer, s::AbstractString)
+    J = map(parentindex, axes(A), (i,j))
+    Base.replace_in_print_matrix(parent(A), J..., s)
+end
+function Base.replace_in_print_matrix(A::OffsetArray{<:Any,1}, i::Integer, j::Integer, s::AbstractString)
+    ip = parentindex(axes(A,1), i)
+    Base.replace_in_print_matrix(parent(A), ip, j, s)
+end
+
 """
     no_offset_view(A)
 

test/runtests.jl

@@ -3,6 +3,7 @@ using Test
 using DelimitedFiles
 using OffsetArrays: IdentityUnitRange, no_offset_view
 using CatIndices: BidirectionalVector
+using LinearAlgebra
 
 @test isempty(detect_ambiguities(OffsetArrays, Base, Core))
 
@@ -380,6 +381,13 @@ end
 
     show(io, OffsetArray(3:5, 0:2))
     @test String(take!(io)) == "3:5 with indices 0:2"
+
+    d = Diagonal([1,2,3])
+    Base.print_array(io, d)
+    s1 = String(take!(io))
+    Base.print_array(io, OffsetArray(d, -1:1, 3:5))
+    s2 = String(take!(io))
+    @test s1 == s2
 end
 
 @testset "readdlm/writedlm" begin