WIP: charwidth function #27
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| Original file line number | Diff line number | Diff line change |
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| # Unicode data generation rules. Except for the test data files, most | ||
| # users will not use these Makefile rules, which are primarily to re-generate | ||
| # unicode_data.c when we get a new Unicode version or charwidth data; they | ||
| # require ruby, fontforge, and julia to be installed. | ||
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| # programs | ||
| CURL=curl | ||
| RUBY=ruby | ||
| PERL=perl | ||
| MAKE=make | ||
| JULIA=julia | ||
| CURLFLAGS = --retry 5 --location | ||
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| # use JuliaLang caching (https://github.com/staticfloat/cache.julialang.org) | ||
| # so that Travis builds do not depend on anyone's flaky servers but our own | ||
| URLCACHE=https://cache.e.ip.saba.us/ | ||
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| .PHONY: clean | ||
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| .DELETE_ON_ERROR: | ||
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| utf8proc_data.c.new: data_generator.rb UnicodeData.txt GraphemeBreakProperty.txt DerivedCoreProperties.txt CompositionExclusions.txt CaseFolding.txt CharWidths.txt | ||
| $(RUBY) data_generator.rb < UnicodeData.txt > $@ | ||
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| # GNU Unifont version for font-metric calculations: | ||
| UNIFONT_VERSION=7.0.06 | ||
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| unifont-$(UNIFONT_VERSION).ttf: | ||
| $(CURL) $(CURLFLAGS) -o $@ $(URLCACHE)http://unifoundry.com/pub/unifont-$(UNIFONT_VERSION)/font-builds/unifont-$(UNIFONT_VERSION).ttf | ||
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| unifont_upper-$(UNIFONT_VERSION).ttf: | ||
| $(CURL) $(CURLFLAGS) -o $@ $(URLCACHE)http://unifoundry.com/pub/unifont-$(UNIFONT_VERSION)/font-builds/unifont_upper-$(UNIFONT_VERSION).ttf | ||
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| CharWidths.txt: charwidths.jl unifont-$(UNIFONT_VERSION).ttf unifont_upper-$(UNIFONT_VERSION).ttf EastAsianWidth.txt | ||
| UNIFONT_VERSION=$(UNIFONT_VERSION) $(JULIA) charwidths.jl > $@ | ||
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| UnicodeData.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UNIDATA/UnicodeData.txt | ||
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| EastAsianWidth.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt | ||
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| GraphemeBreakProperty.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UCD/latest/ucd/auxiliary/GraphemeBreakProperty.txt | ||
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| DerivedCoreProperties.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UNIDATA/DerivedCoreProperties.txt | ||
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| CompositionExclusions.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UNIDATA/CompositionExclusions.txt | ||
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| CaseFolding.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UNIDATA/CaseFolding.txt | ||
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| NormalizationTest.txt: | ||
| $(CURL) $(CURLFLAGS) -o $@ -O $(URLCACHE)http://www.unicode.org/Public/UNIDATA/NormalizationTest.txt | ||
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| GraphemeBreakTest.txt: | ||
| $(CURL) $(CURLFLAGS) $(URLCACHE)http://www.unicode.org/Public/UCD/latest/ucd/auxiliary/GraphemeBreakTest.txt | $(PERL) -pe 's,÷,/,g;s,×,+,g' > $@ | ||
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| clean: | ||
| rm -f UnicodeData.txt EastAsianWidth.txt DerivedCoreProperties.txt CompositionExclusions.txt CaseFolding.txt NormalizationTest.txt GraphemeBreakTest.txt CharWidths.txt unifont*.ttf unifont*.sfd |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,161 @@ | ||
| # Following work by @jiahao, we compute character widths using a combination of | ||
| # * advance widths from GNU Unifont (advance width 512 = 1 en) | ||
| # * UAX 11: East Asian Width | ||
| # * a few exceptions as needed | ||
| # Adapted from http://nbviewer.ipython.org/gist/jiahao/07e8b08bf6d8671e9734 | ||
| # | ||
| # Requires Julia (obviously) and FontForge. | ||
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| ############################################################################# | ||
| # Julia 0.3/0.4 compatibility (taken from Compat package) | ||
| if VERSION < v"0.4.0-dev+1419" | ||
| const UInt16 = Uint16 | ||
| end | ||
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| CharWidths = Dict{Int,Int}() | ||
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| ############################################################################# | ||
| # Widths from GNU Unifont | ||
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| universion=get(ENV, "UNIFONT_VERSION", "7.0.06") | ||
| for fontfile in ["unifont-$universion", "unifont_upper-$universion"] | ||
| isfile("$fontfile.ttf") || download("http://unifoundry.com/pub/unifont-$universion/font-builds/$fontfile.ttf", "$fontfile.ttf") | ||
| isfile("$fontfile.sfd") || run(`fontforge -lang=ff -c "Open(\"$fontfile.ttf\");Save(\"$fontfile.sfd\");Quit(0);"`) | ||
| end | ||
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| #Read sfdfile for character widths | ||
| function parsesfd(filename::String, CharWidths::Dict{Int,Int}=Dict{Int,Int}()) | ||
| state=:seekchar | ||
| lineno = 0 | ||
| 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 = int(split(line)[3])) | ||
| contains(line, "Width:") && (width = int(split(line)[2])) | ||
| if codepoint!=nothing && width!=nothing && codepoint >= 0 | ||
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There was a problem hiding this comment. @jiahao, I added the codepoint>=0 check here since the sfd file seems to have some codepoint -1 entries in the beginning. |
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| CharWidths[codepoint]=div(width, 512) # 512 units to the en | ||
| state = :seekchar | ||
| end | ||
| end | ||
| end | ||
| CharWidths | ||
| end | ||
| CharWidths=parsesfd("unifont-$universion.sfd", CharWidths) | ||
| CharWidths=parsesfd("unifont_upper-$universion.sfd", CharWidths) | ||
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| ############################################################################# | ||
| # 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 | ||
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| isfile("EastAsianWidth.txt") || download("http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt", "EastAsianWidth.txt") | ||
| 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 = uint32("0x"*rangetokens[1]) | ||
| charend = uint32("0x"*rangetokens[length(rangetokens)>1 ? 2 : 1]) | ||
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| #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 | ||
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| ############################################################################# | ||
| # A few exceptions to the above cases, found by manual comparison | ||
| # to other wcwidth functions and similar checks. | ||
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| # Use ../libutf8proc for category codes, rather than the one in Julia, | ||
| # to minimize bootstrapping complexity when a new version of Unicode comes out. | ||
| function catcode(c) | ||
| uint(c) > 0x10FFFF && return 0x0000 # see utf8proc_get_property docs | ||
| return unsafe_load(ccall((:utf8proc_get_property,"../libutf8proc"), Ptr{UInt16}, (Int32,), c)) | ||
| end | ||
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| # use Base.UTF8proc module to get category codes constants, since | ||
| # we aren't goint to change these in utf8proc. | ||
| import Base.UTF8proc | ||
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| for c in keys(CharWidths) | ||
| cat = catcode(c) | ||
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| # 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 | ||
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| # 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 | ||
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| # 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 | ||
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| # for some reason, Unifont has width-2 glyphs for ASCII control chars | ||
| if cat==UTF8proc.UTF8PROC_CATEGORY_CC | ||
| CharWidths[c]=0 | ||
| end | ||
| end | ||
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| #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 | ||
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| #By definition, should be narrow = width of 1 en space | ||
| #0x00202f ' ' category: Zs name: NARROW NO-BREAK SPACE/ | ||
| CharWidths[0x202f]=1 | ||
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| #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 | ||
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|
There was a problem hiding this comment. @jiahao, in a monospaced font, like in a terminal, aren't em and en the same? |
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| ############################################################################# | ||
| # 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. | ||
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| 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 | ||
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Note that -lang=ff seems to be needed for recent versions of fontforge, since they changed the -c option to accept Python scripts by default rather than FontForge's own scripting language.