A => .gitignore +3 -0
@@ 1,3 @@
+/dist/
+/dist-newstyle/
+/.golden/*/actual
A => .golden/czechHello/golden +16 -0
@@ 1,16 @@
+[
+ [
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A => CHANGELOG.md +5 -0
@@ 1,5 @@
+# Revision history for balkon
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.
A => LICENSE +674 -0
@@ 1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
A => assets/fonts/ubuntu/LICENCE.txt +96 -0
@@ 1,96 @@
+-------------------------------
+UBUNTU FONT LICENCE Version 1.0
+-------------------------------
+
+PREAMBLE
+This licence allows the licensed fonts to be used, studied, modified and
+redistributed freely. The fonts, including any derivative works, can be
+bundled, embedded, and redistributed provided the terms of this licence
+are met. The fonts and derivatives, however, cannot be released under
+any other licence. The requirement for fonts to remain under this
+licence does not require any document created using the fonts or their
+derivatives to be published under this licence, as long as the primary
+purpose of the document is not to be a vehicle for the distribution of
+the fonts.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this licence and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Original Version" refers to the collection of Font Software components
+as received under this licence.
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to
+a new environment.
+
+"Copyright Holder(s)" refers to all individuals and companies who have a
+copyright ownership of the Font Software.
+
+"Substantially Changed" refers to Modified Versions which can be easily
+identified as dissimilar to the Font Software by users of the Font
+Software comparing the Original Version with the Modified Version.
+
+To "Propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification and with or without charging
+a redistribution fee), making available to the public, and in some
+countries other activities as well.
+
+PERMISSION & CONDITIONS
+This licence does not grant any rights under trademark law and all such
+rights are reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of the Font Software, to propagate the Font Software, subject to
+the below conditions:
+
+1) Each copy of the Font Software must contain the above copyright
+notice and this licence. These can be included either as stand-alone
+text files, human-readable headers or in the appropriate machine-
+readable metadata fields within text or binary files as long as those
+fields can be easily viewed by the user.
+
+2) The font name complies with the following:
+(a) The Original Version must retain its name, unmodified.
+(b) Modified Versions which are Substantially Changed must be renamed to
+avoid use of the name of the Original Version or similar names entirely.
+(c) Modified Versions which are not Substantially Changed must be
+renamed to both (i) retain the name of the Original Version and (ii) add
+additional naming elements to distinguish the Modified Version from the
+Original Version. The name of such Modified Versions must be the name of
+the Original Version, with "derivative X" where X represents the name of
+the new work, appended to that name.
+
+3) The name(s) of the Copyright Holder(s) and any contributor to the
+Font Software shall not be used to promote, endorse or advertise any
+Modified Version, except (i) as required by this licence, (ii) to
+acknowledge the contribution(s) of the Copyright Holder(s) or (iii) with
+their explicit written permission.
+
+4) The Font Software, modified or unmodified, in part or in whole, must
+be distributed entirely under this licence, and must not be distributed
+under any other licence. The requirement for fonts to remain under this
+licence does not affect any document created using the Font Software,
+except any version of the Font Software extracted from a document
+created using the Font Software may only be distributed under this
+licence.
+
+TERMINATION
+This licence becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER
+DEALINGS IN THE FONT SOFTWARE.
A => assets/fonts/ubuntu/TRADEMARKS.txt +4 -0
@@ 1,4 @@
+Ubuntu and Canonical are registered trademarks of Canonical Ltd.
+
+The licence accompanying these works does not grant any rights
+under trademark law and all such rights are reserved.
A => assets/fonts/ubuntu/Ubuntu-R.ttf +0 -0
A => assets/fonts/ubuntu/copyright.txt +5 -0
@@ 1,5 @@
+Copyright 2010,2011 Canonical Ltd.
+
+This Font Software is licensed under the Ubuntu Font Licence, Version
+1.0. https://launchpad.net/ubuntu-font-licence
+
A => balkon.cabal +103 -0
@@ 1,103 @@
+cabal-version: 2.4
+
+-- Initial package description 'balkon.cabal' generated by
+-- 'cabal init'. For further documentation, see:
+-- http://haskell.org/cabal/users-guide/
+--
+-- The name of the package.
+name: balkon
+
+-- The package version.
+-- See the Haskell package versioning policy (PVP) for standards
+-- guiding when and how versions should be incremented.
+-- https://pvp.haskell.org
+-- PVP summary: +-+------- breaking API changes
+-- | | +----- non-breaking API additions
+-- | | | +--- code changes with no API change
+version: 0.1.0.0
+
+-- A short (one-line) description of the package.
+synopsis: Text layout engine built on top of HarfBuzz
+
+-- A longer description of the package.
+-- description:
+
+-- URL for the project homepage or repository.
+homepage:
+
+-- A URL where users can report bugs.
+-- bug-reports:
+
+-- The license under which the package is released.
+license: GPL-3.0-only
+
+-- The file containing the license text.
+license-file: LICENSE
+
+-- The package author(s).
+author: Jaro
+
+-- An email address to which users can send suggestions, bug reports, and patches.
+maintainer: jaro@argonaut-constellation.org
+
+-- A copyright notice.
+-- copyright:
+category: Text
+
+-- Extra doc files to be distributed with the package, such as a CHANGELOG or a README.
+extra-doc-files: CHANGELOG.md
+
+-- Extra source files to be distributed with the package, such as examples, or a tutorial module.
+-- extra-source-files:
+
+library
+ -- Modules exported by the library.
+ exposed-modules: Data.Text.ParagraphLayout
+
+ -- Modules included in this library but not exported.
+ other-modules: Data.Text.Script
+
+ -- LANGUAGE extensions used by modules in this package.
+ -- other-extensions:
+
+ -- Other library packages from which modules are imported.
+ build-depends:
+ base ^>=4.15.1.0,
+ harfbuzz-pure ^>=1.0.2.0,
+ text ^>=2.0.1,
+ text-icu ^>=0.8.0.2,
+ unicode-data-scripts ^>=0.2.0.1
+
+ -- Directories containing source files.
+ hs-source-dirs: src
+
+ -- Base language which the package is written in.
+ default-language: Haskell2010
+
+ ghc-options: -Wall
+
+test-suite balkon-test
+ -- Base language which the package is written in.
+ default-language: Haskell2010
+
+ ghc-options: -Wall
+
+ -- The interface type and version of the test suite.
+ type: exitcode-stdio-1.0
+
+ -- Directories containing source files.
+ hs-source-dirs: test
+
+ -- The entrypoint to the test suite.
+ main-is: ParagraphLayoutTest.hs
+
+ -- Test dependencies.
+ build-depends:
+ base ^>=4.15.1.0,
+ balkon,
+ bytestring ^>=0.11.4.0,
+ filepath ^>=1.4.100.0,
+ hspec,
+ hspec-golden ^>=0.2.0.0,
+ harfbuzz-pure ^>=1.0.2.0,
+ text ^>=2.0.1
A => src/Data/Text/ParagraphLayout.hs +144 -0
@@ 1,144 @@
+module Data.Text.ParagraphLayout (Span(..), layout)
+where
+
+import Data.Text.Glyphize
+ (Buffer(..)
+ ,ContentType(ContentTypeUnicode)
+ ,Direction(..)
+ ,Font
+ ,GlyphInfo
+ ,GlyphPos
+ ,defaultBuffer
+ ,shape
+ )
+import qualified Data.Text.ICU.Char as ICUChar
+import Data.Text.Lazy (Text)
+import qualified Data.Text.Lazy as Text
+import Data.Text.Script (charScript)
+
+type ScriptCode = String
+type Language = String
+
+-- Paragraph is broken into spans by the caller.
+--
+-- Each span could have a different font family, size, style, text decoration,
+-- colour, language, etc.
+--
+-- TODO: Add all relevant attributes.
+--
+data Span = Span
+ { spanText :: Text
+ , spanFont :: Font
+ , spanLanguage :: Maybe Language
+ }
+ deriving (Eq, Show)
+
+-- Each span can be broken into one or more runs by Balkón.
+--
+-- Each run could have a different script, language, or direction.
+--
+data Run = Run
+ { runText :: Text
+ , runDirection :: Maybe Direction
+ , runScript :: Maybe ScriptCode
+ , runOriginalSpan :: Span
+ }
+ deriving (Eq, Show)
+
+type ProtoRun = (String, Maybe Direction, ScriptCode)
+
+data Merged a = Incompatible | Merged a
+
+data Position = Beginning | Middle | End | Only
+ deriving (Eq)
+
+-- TODO: Add maximum line length as input.
+-- TODO: Compute and return bounding box for each provided span.
+-- More if implementing the CSS Box Model.
+-- TODO: Also compute and return overall bounding box, in addition to individual
+-- ones.
+-- TODO: Allow a run across multiple spans (e.g. if they only differ by colour).
+layout :: [Span] -> [[(GlyphInfo, GlyphPos)]]
+layout = layoutRuns . concat . map spanToRuns
+
+-- TODO: Optimise and preserve the Data.Text.Lazy structure.
+spanToRuns :: Span -> [Run]
+spanToRuns s = map run $ protoRuns chars
+ where
+ chars = reverse $ Text.unpack $ spanText s
+ run (t, d, sc) = Run
+ { runText = Text.pack t
+ , runDirection = d
+ , runScript = Just sc
+ , runOriginalSpan = s
+ }
+
+-- TODO: Try to avoid reversing.
+protoRuns :: [Char] -> [ProtoRun]
+protoRuns = reverse . map (\(t, d, s) -> (reverse t, d, s)) . foldr foldRun []
+
+foldRun :: Char -> [ProtoRun] -> [ProtoRun]
+foldRun c [] =
+ -- If there are no runs, create a new run with a single character.
+ [([c], charDirection c, charScript c)]
+foldRun c (r@(oldString, d1, s1):rs) =
+ case (mergeDirections d1 d2, mergeScripts s1 s2) of
+ -- If direction & script are compatible, add to existing run.
+ (Merged d, Merged s) -> ((c:oldString, d, s):rs)
+ -- Otherwise create a new run.
+ _ -> (([c], d2, s2):r:rs)
+ where
+ d2 = charDirection c
+ s2 = charScript c
+
+-- Simplified detection of text direction for unidirectional text.
+mergeDirections :: Maybe Direction -> Maybe Direction -> Merged (Maybe Direction)
+mergeDirections Nothing Nothing = Merged Nothing
+mergeDirections (Just d1) Nothing = Merged (Just d1)
+mergeDirections Nothing (Just d2) = Merged (Just d2)
+mergeDirections (Just d1) (Just d2)
+ | d1 == d2 = Merged (Just d1)
+ | otherwise = Incompatible
+
+-- TODO: Implement proper inheritance rules.
+mergeScripts :: ScriptCode -> ScriptCode -> Merged ScriptCode
+mergeScripts "Zyyy" s2 = Merged s2
+mergeScripts s1 "Zyyy" = Merged s1
+mergeScripts s1 "Zinh" = Merged s1
+mergeScripts s1 s2
+ | s1 == s2 = Merged s1
+ | otherwise = Incompatible
+
+-- TODO: Use the BiDi algorithm to support bidirectional text.
+charDirection :: Char -> Maybe Direction
+charDirection c = case ICUChar.direction c of
+ ICUChar.LeftToRight -> Just DirLTR
+ ICUChar.RightToLeft -> Just DirRTL
+ ICUChar.RightToLeftArabic -> Just DirRTL
+ _ -> Nothing
+
+layoutRuns :: [Run] -> [[(GlyphInfo, GlyphPos)]]
+layoutRuns [] = []
+layoutRuns [s] = [layoutOneRun Only s]
+-- TODO: What if there are no visible characters in the edge runs?
+layoutRuns (s1:s2:ss) = (layoutOneRun Beginning s1):(layoutRemainingRuns s2 ss)
+
+layoutRemainingRuns :: Run -> [Run] -> [[(GlyphInfo, GlyphPos)]]
+layoutRemainingRuns s [] = [layoutOneRun End s]
+layoutRemainingRuns s1 (s2:ss) = (layoutOneRun Middle s1):(layoutRemainingRuns s2 ss)
+
+layoutOneRun :: Position -> Run -> [(GlyphInfo, GlyphPos)]
+layoutOneRun pos run = shape font buffer features
+ where
+ originalSpan = runOriginalSpan run
+ font = spanFont originalSpan
+ lang = spanLanguage originalSpan
+ buffer = defaultBuffer { text = runText run
+ , contentType = Just ContentTypeUnicode
+ , direction = runDirection run
+ , script = runScript run
+ , language = lang
+ , beginsText = pos == Beginning || pos == Only
+ , endsText = pos == End || pos == Only
+ }
+ features = []
A => src/Data/Text/Script.hs +177 -0
@@ 1,177 @@
+module Data.Text.Script (charScript)
+where
+
+-- TODO: Use a direct interface to the ICU library, if possible.
+-- The unicode-data-scripts package and the shortening code in this file use
+-- hardcoded ranges, which may get out of sync with ICU.
+import Unicode.Char.General.Scripts
+
+charScript :: Char -> String
+charScript = code . script
+
+-- Hardcoded shortenings of script codes as of Unicode 15.0.0.
+code :: Script -> String
+code Adlam = "Adlm"
+code Ahom = "Ahom"
+code AnatolianHieroglyphs = "Hluw"
+code Arabic = "Arab"
+code Armenian = "Armn"
+code Avestan = "Avst"
+code Balinese = "Bali"
+code Bamum = "Bamu"
+code BassaVah = "Bass"
+code Batak = "Batk"
+code Bengali = "Beng"
+code Bhaiksuki = "Bhks"
+code Bopomofo = "Bopo"
+code Brahmi = "Brah"
+code Braille = "Brai"
+code Buginese = "Bugi"
+code Buhid = "Buhd"
+code CanadianAboriginal = "Cans"
+code Carian = "Cari"
+code CaucasianAlbanian = "Aghb"
+code Chakma = "Cakm"
+code Cham = "Cham"
+code Cherokee = "Cher"
+code Chorasmian = "Chrs"
+code Common = "Zyyy"
+code Coptic = "Copt"
+code Cuneiform = "Xsux"
+code Cypriot = "Cprt"
+code CyproMinoan = "Cpmn"
+code Cyrillic = "Cyrl"
+code Deseret = "Dsrt"
+code Devanagari = "Deva"
+code DivesAkuru = "Diak"
+code Dogra = "Dogr"
+code Duployan = "Dupl"
+code EgyptianHieroglyphs = "Egyp"
+code Elbasan = "Elba"
+code Elymaic = "Elym"
+code Ethiopic = "Ethi"
+code Georgian = "Geor"
+code Glagolitic = "Glag"
+code Gothic = "Goth"
+code Grantha = "Gran"
+code Greek = "Grek"
+code Gujarati = "Gujr"
+code GunjalaGondi = "Gong"
+code Gurmukhi = "Guru"
+code Han = "Hani"
+code Hangul = "Hang"
+code HanifiRohingya = "Rohg"
+code Hanunoo = "Hano"
+code Hatran = "Hatr"
+code Hebrew = "Hebr"
+code Hiragana = "Hira"
+code ImperialAramaic = "Armi"
+code Inherited = "Zinh"
+code InscriptionalPahlavi = "Phli"
+code InscriptionalParthian = "Prti"
+code Javanese = "Java"
+code Kaithi = "Kthi"
+code Kannada = "Knda"
+code Katakana = "Kana"
+code Kawi = "Kawi"
+code KayahLi = "Kali"
+code Kharoshthi = "Khar"
+code KhitanSmallScript = "Kits"
+code Khmer = "Khmr"
+code Khojki = "Khoj"
+code Khudawadi = "Sind"
+code Lao = "Laoo"
+code Latin = "Latn"
+code Lepcha = "Lepc"
+code Limbu = "Limb"
+code LinearA = "Lina"
+code LinearB = "Linb"
+code Lisu = "Lisu"
+code Lycian = "Lyci"
+code Lydian = "Lydi"
+code Mahajani = "Mahj"
+code Makasar = "Maka"
+code Malayalam = "Mlym"
+code Mandaic = "Mand"
+code Manichaean = "Mani"
+code Marchen = "Marc"
+code MasaramGondi = "Gonm"
+code Medefaidrin = "Medf"
+code MeeteiMayek = "Mtei"
+code MendeKikakui = "Mend"
+code MeroiticCursive = "Merc"
+code MeroiticHieroglyphs = "Mero"
+code Miao = "Plrd"
+code Modi = "Modi"
+code Mongolian = "Mong"
+code Mro = "Mroo"
+code Multani = "Mult"
+code Myanmar = "Mymr"
+code Nabataean = "Nbat"
+code NagMundari = "Nagm"
+code Nandinagari = "Nand"
+code NewTaiLue = "Talu"
+code Newa = "Newa"
+code Nko = "Nkoo"
+code Nushu = "Nshu"
+code NyiakengPuachueHmong = "Hmnp"
+code Ogham = "Ogam"
+code OlChiki = "Olck"
+code OldHungarian = "Hung"
+code OldItalic = "Ital"
+code OldNorthArabian = "Narb"
+code OldPermic = "Perm"
+code OldPersian = "Xpeo"
+code OldSogdian = "Sogo"
+code OldSouthArabian = "Sarb"
+code OldTurkic = "Orkh"
+code OldUyghur = "Ougr"
+code Oriya = "Orya"
+code Osage = "Osge"
+code Osmanya = "Osma"
+code PahawhHmong = "Hmng"
+code Palmyrene = "Palm"
+code PauCinHau = "Pauc"
+code PhagsPa = "Phag"
+code Phoenician = "Phnx"
+code PsalterPahlavi = "Phlp"
+code Rejang = "Rjng"
+code Runic = "Runr"
+code Samaritan = "Samr"
+code Saurashtra = "Saur"
+code Sharada = "Shrd"
+code Shavian = "Shaw"
+code Siddham = "Sidd"
+code SignWriting = "Sgnw"
+code Sinhala = "Sinh"
+code Sogdian = "Sogd"
+code SoraSompeng = "Sora"
+code Soyombo = "Soyo"
+code Sundanese = "Sund"
+code SylotiNagri = "Sylo"
+code Syriac = "Syrc"
+code Tagalog = "Tglg"
+code Tagbanwa = "Tagb"
+code TaiLe = "Tale"
+code TaiTham = "Lana"
+code TaiViet = "Tavt"
+code Takri = "Takr"
+code Tamil = "Taml"
+code Tangsa = "Tnsa"
+code Tangut = "Tang"
+code Telugu = "Telu"
+code Thaana = "Thaa"
+code Thai = "Thai"
+code Tibetan = "Tibt"
+code Tifinagh = "Tfng"
+code Tirhuta = "Tirh"
+code Toto = "Toto"
+code Ugaritic = "Ugar"
+code Unknown = "Zzzz"
+code Vai = "Vaii"
+code Vithkuqi = "Vith"
+code Wancho = "Wcho"
+code WarangCiti = "Wara"
+code Yezidi = "Yezi"
+code Yi = "Yiii"
+code ZanabazarSquare = "Zanb"
A => test/ParagraphLayoutTest.hs +54 -0
@@ 1,54 @@
+module Main (main) where
+
+import qualified Data.ByteString as BS
+import Data.List (intersperse)
+import Data.Text.Glyphize (Font, GlyphInfo, GlyphPos, createFace, createFont)
+import Data.Text.Lazy (pack)
+
+import Test.Hspec
+import Test.Hspec.Golden
+import System.FilePath ((</>))
+import Data.Text.ParagraphLayout
+
+type LayoutOutput = [[(GlyphInfo,GlyphPos)]]
+
+czechHello :: Font -> Span
+czechHello font = Span
+ { spanText = pack "Ahoj, světe!"
+ , spanFont = font
+ , spanLanguage = Just "cs"
+ }
+
+prettyShow :: LayoutOutput -> String
+prettyShow = showOutput
+ where
+ showOutput rs = concat ["[\n", showRuns rs, "\n]\n"]
+ showRuns = concat . intersperse ",\n" . map showRun
+ showRun gs = concat [indent1, "[\n", showGlyphs gs, "\n", indent1, "]"]
+ showGlyphs = concat . intersperse ",\n" . map showGlyph
+ showGlyph g = concat [indent2, show g]
+ indent1 = " "
+ indent2 = indent1 ++ indent1
+
+shouldBeGolden :: LayoutOutput -> FilePath -> Golden LayoutOutput
+shouldBeGolden output_ name = Golden
+ { output = output_
+ , encodePretty = show
+ , writeToFile = \path -> writeFile path . prettyShow
+ , readFromFile = \path -> readFile path >>= return . read
+ , goldenFile = ".golden" </> name </> "golden"
+ , actualFile = Just (".golden" </> name </> "actual")
+ , failFirstTime = False
+ }
+
+main :: IO ()
+main = do
+ ttf <- BS.readFile ("assets" </> "fonts" </> "ubuntu" </> "Ubuntu-R.ttf")
+ let face = createFace ttf 0
+ let font = createFont face
+ hspec $ do
+ describe "layout" $ do
+ it "handles empty input" $ do
+ layout [] `shouldBe` []
+ it "handles Czech hello" $ do
+ layout [czechHello font] `shouldBeGolden` "czechHello"