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-rw-r--r--3rdparty/utf8proc/data/charwidths.jl190
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+# Following work by @jiahao, we compute character widths using a combination of
+# * advance widths from GNU Unifont (advance width 512 = 1 en)
+# * UAX 11: East Asian Width
+# * a few exceptions as needed
+# Adapted from http://nbviewer.ipython.org/gist/jiahao/07e8b08bf6d8671e9734
+#
+# Requires Julia (obviously) and FontForge.
+
+#############################################################################
+# Julia 0.3/0.4 compatibility (taken from Compat package)
+if VERSION < v"0.4.0-dev+1387"
+ typealias AbstractString String
+end
+if VERSION < v"0.4.0-dev+1419"
+ const UInt32 = Uint32
+end
+if VERSION < v"0.4.0-dev+3874"
+ Base.parse{T<:Integer}(::Type{T}, s::AbstractString) = parseint(T, s)
+end
+
+CharWidths = Dict{Int,Int}()
+
+#############################################################################
+# Use ../libutf8proc for category codes, rather than the one in Julia,
+# to minimize bootstrapping complexity when a new version of Unicode comes out.
+catcode(c) = ccall((:utf8proc_category,"../libutf8proc"), Cint, (Int32,), c)
+
+# use Base.UTF8proc module to get category codes constants, since
+# we won't change these in utf8proc.
+import Base.UTF8proc
+
+#############################################################################
+# Use a default width of 1 for all character categories that are
+# letter/symbol/number-like. This can be overriden by Unifont or UAX 11
+# below, but provides a useful nonzero fallback for new codepoints when
+# a new Unicode version has been released but Unifont hasn't been updated yet.
+
+zerowidth = Set{Int}() # categories that may contain zero-width chars
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_CN)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_MN)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_MC)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_ME)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_SK)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_ZS)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_ZL)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_ZP)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_CC)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_CF)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_CS)
+push!(zerowidth, UTF8proc.UTF8PROC_CATEGORY_CO)
+for c in 0x0000:0x110000
+ if catcode(c) ∉ zerowidth
+ CharWidths[c] = 1
+ end
+end
+
+#############################################################################
+# Widths from GNU Unifont
+
+#Read sfdfile for character widths
+function parsesfd(filename::AbstractString, CharWidths::Dict{Int,Int}=Dict{Int,Int}())
+ state=:seekchar
+ lineno = 0
+ codepoint = width = nothing
+ for line in readlines(open(filename))
+ lineno += 1
+ if state==:seekchar #StartChar: nonmarkingreturn
+ if contains(line, "StartChar: ")
+ codepoint = nothing
+ width = nothing
+ state = :readdata
+ end
+ elseif state==:readdata #Encoding: 65538 -1 2, Width: 1024
+ contains(line, "Encoding:") && (codepoint = parse(Int, split(line)[3]))
+ contains(line, "Width:") && (width = parse(Int, split(line)[2]))
+ if codepoint!=nothing && width!=nothing && codepoint >= 0
+ w=div(width, 512) # 512 units to the en
+ if w > 0
+ # only add nonzero widths, since (1) the default is zero
+ # and (2) this circumvents some apparent bugs in Unifont
+ # (https://savannah.gnu.org/bugs/index.php?45395)
+ CharWidths[codepoint] = w
+ end
+ state = :seekchar
+ end
+ end
+ end
+ CharWidths
+end
+CharWidths=parsesfd("unifont.sfd", CharWidths)
+CharWidths=parsesfd("unifont_upper.sfd", CharWidths)
+
+#############################################################################
+# Widths from UAX #11: East Asian Width
+# .. these take precedence over the Unifont width for all codepoints
+# listed explicitly as wide/full/narrow/half-width
+
+for line in readlines(open("EastAsianWidth.txt"))
+ #Strip comments
+ line[1] == '#' && continue
+ precomment = split(line, '#')[1]
+ #Parse code point range and width code
+ tokens = split(precomment, ';')
+ length(tokens) >= 2 || continue
+ charrange = tokens[1]
+ width = strip(tokens[2])
+ #Parse code point range into Julia UnitRange
+ rangetokens = split(charrange, "..")
+ charstart = parse(UInt32, "0x"*rangetokens[1])
+ charend = parse(UInt32, "0x"*rangetokens[length(rangetokens)>1 ? 2 : 1])
+
+ #Assign widths
+ for c in charstart:charend
+ if width=="W" || width=="F" # wide or full
+ CharWidths[c]=2
+ elseif width=="Na"|| width=="H" # narrow or half
+ CharWidths[c]=1
+ end
+ end
+end
+
+#############################################################################
+# A few exceptions to the above cases, found by manual comparison
+# to other wcwidth functions and similar checks.
+
+for c in keys(CharWidths)
+ cat = catcode(c)
+
+ # make sure format control character (category Cf) have width 0,
+ # except for the Arabic characters 0x06xx (see unicode std 6.2, sec. 8.2)
+ if cat==UTF8proc.UTF8PROC_CATEGORY_CF && c ∉ [0x0601,0x0602,0x0603,0x06dd]
+ CharWidths[c]=0
+ end
+
+ # Unifont has nonzero width for a number of non-spacing combining
+ # characters, e.g. (in 7.0.06): f84,17b4,17b5,180b,180d,2d7f, and
+ # the variation selectors
+ if cat==UTF8proc.UTF8PROC_CATEGORY_MN
+ CharWidths[c]=0
+ end
+
+ # We also assign width of zero to unassigned and private-use
+ # codepoints (Unifont includes ConScript Unicode Registry PUA fonts,
+ # but since these are nonstandard it seems questionable to recognize them).
+ if cat==UTF8proc.UTF8PROC_CATEGORY_CO || cat==UTF8proc.UTF8PROC_CATEGORY_CN
+ CharWidths[c]=0
+ end
+
+ # for some reason, Unifont has width-2 glyphs for ASCII control chars
+ if cat==UTF8proc.UTF8PROC_CATEGORY_CC
+ CharWidths[c]=0
+ end
+end
+
+#By definition, should have zero width (on the same line)
+#0x002028 '
' category: Zl name: LINE SEPARATOR/
+#0x002029 '
' category: Zp name: PARAGRAPH SEPARATOR/
+CharWidths[0x2028]=0
+CharWidths[0x2029]=0
+
+#By definition, should be narrow = width of 1 en space
+#0x00202f ' ' category: Zs name: NARROW NO-BREAK SPACE/
+CharWidths[0x202f]=1
+
+#By definition, should be wide = width of 1 em space
+#0x002001 ' ' category: Zs name: EM QUAD/
+#0x002003 ' ' category: Zs name: EM SPACE/
+CharWidths[0x2001]=2
+CharWidths[0x2003]=2
+
+#############################################################################
+# Output (to a file or pipe) for processing by data_generator.rb
+# ... don't bother to output zero widths since that will be the default.
+
+firstc = 0x000000
+lastv = 0
+uhex(c) = uppercase(hex(c,4))
+for c in 0x0000:0x110000
+ v = get(CharWidths, c, 0)
+ if v != lastv || c == 0x110000
+ v < 4 || error("invalid charwidth $v for $c")
+ if firstc+1 < c
+ println(uhex(firstc), "..", uhex(c-1), "; ", lastv)
+ else
+ println(uhex(firstc), "; ", lastv)
+ end
+ firstc = c
+ lastv = v
+ end
+end