Description: Requesting that text justification be done by stretching the word-line (called "Kashida" or "tatweel") rather than the spaces between the words. This was fixed in arabic, and it's essentially the same feature with similar rules to arabic. (This type of feature is essential for many use cases of Syriac: virtually all Syriac texts are justified.) Steps to Reproduce: 1. Paste in or type in a Syriac text. 2. Justify the text. 3. Set Right-to-Left (need complex layouts enabled). 4. Put line-breaks to test the justification. 5. Pick a font like "Noto Sans Syriac Western" Actual Results: There are wide spaces between words. Expected Results: The connecting line of the words should stretch so that there is minimal white space, very similar to Arabic. Reproducible: Always User Profile Reset: No Additional Info: sample text for convenience: ܐܰܒܓܰܕ ܗܰܘܰܙ ܚܰܛܺܝ ܟܰܠܡܰܢ ܣܰܥܦܰܨ ܩܰܪܫܰܬ ܐܲܒܓܲܕ ܗܲܘܲܙ ܚܲܛܲܝ ܟܲܠܡܲܢ ܣܲܥܦܲܨ ܩܲܪܫܲܬ ܐܒܓܕ ܗܘܙ ܚܛܝ ܟܠܡܢ ܣܥܦܨ ܩܪܫܬ Help - About LibreOffice: Version: 7.0.3.1 Build ID: 00(Build:1) CPU threads: 6; OS: Linux 5.8; UI render: default; VCL: gtk3 Locale: en-CA (en_CA.UTF-8); UI: en-US Ubuntu package version: 1:7.0.3-0ubuntu0.20.10.1 Calc: threaded
Created attachment 170189 [details] sample image
Thank you for reporting the bug. Please attach a sample document, as this makes it easier for us to verify the bug. You've also mentioned, that the problem has been fixed for arabic. Do you know the bug number or can you search for it (meta bug 112810 could be one starting point) I have set the bug's status to 'NEEDINFO'. Please change it back to 'UNCONFIRMED' once the requested document is provided. (Please note that the attachment will be public, remove any sensitive information before attaching it)
Created attachment 170659 [details] Sample Doc
Thank you. I have attached the document sample. As for other Arabic bugs that are related I am not sure: I just noticed that it started to work when I decided to try again. Here's a related bug, but not the same issue exactly: https://bugs.documentfoundation.org/show_bug.cgi?id=112849 The implementation in Arabic may be here if I'm not mistaken: https://git.libreoffice.org/core/+/HEAD/vcl/source/gdi/CommonSalLayout.cxx#643
Thank you for the document. I'm not sure, if I can see the problem or not. So I hope somebody who is familiar with Syriac texts can confirm it.
Created attachment 176213 [details] Document illustrating the problem The attached document has justified and unjustified paragraphs, with Syriac and then with Arabic text, to illustrate how tatweel is _not_ applied to Syriac.
Created attachment 176214 [details] The illustrating document exported to PDF The same document, exported to PDF. I was using: Version: 7.3.0.0.alpha0+ / LibreOffice Community Build ID: c998691e22ceda15c89d55cf7005201f0392dadb CPU threads: 4; OS: Linux 5.10; UI render: default; VCL: gtk3 Locale: en-US (en_IL); UI: en-US TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time: 2021-10-14_11:54:20 but obviously this bug dates back for as long as we've had Tatweel.
some code pointers at least: sw/source/core/text/porlay.cxx SwScriptInfo::InitScriptInfo the code before the "m_Kashida.insert" only knows about Arabic rules and not any Syriac equivalents. If that was implemented, it might then be necessary to undo the change associated with bug 116344 to get the right final effect.
So far I have not been able to find any documentation for Kashida insertion rule for justifying Syriac text. Without such documentation there is no way to implement this feature. Also it would be nice to know if there exists any other software that does such justification.
(In reply to Khaled Hosny from comment #9) > So far I have not been able to find any documentation for Kashida insertion > rule for justifying Syriac text. Without such documentation there is no way > to implement this feature. Also it would be nice to know if there exists any > other software that does such justification. Does this help? Developing OpenType Fonts for Syriac Script https://docs.microsoft.com/en-us/typography/script-development/syriac Also, here I read: "Syriac and Mongolian have properties similar to Arabic, and in the absence of additional information should be given similar treatment for justification." https://www.w3.org/International/articles/typography/justification.en which means the Mongolian script should also be considered.
Created attachment 181744 [details] First attachment in docx format
Created attachment 181745 [details] First attachment in PDF format created by MS Word
(In reply to Hossein from comment #10) > (In reply to Khaled Hosny from comment #9) > > So far I have not been able to find any documentation for Kashida insertion > > rule for justifying Syriac text. Without such documentation there is no way > > to implement this feature. Also it would be nice to know if there exists any > > other software that does such justification. > > Does this help? > > Developing OpenType Fonts for Syriac Script > https://docs.microsoft.com/en-us/typography/script-development/syriac Only passing mention of Kashida (the respective Arabic section doesn’t either, the Arabic rules we use were documented on some MS page about Internet Explorer that is no longer online https://web.archive.org/web/20130308140133/http://www.microsoft.com/middleeast/msdn/JustifyingText-CSS.aspx) > Also, here I read: > > "Syriac and Mongolian have properties similar to Arabic, and in the absence > of additional information should be given similar treatment for > justification." > https://www.w3.org/International/articles/typography/justification.en > > which means the Mongolian script should also be considered. I read that as well, also nk'o is said to use similar technique, but no rules to implement either.
(In reply to Hossein from comment #12) > Created attachment 181745 [details] > First attachment in PDF format created by MS Word You might need to change the type of justification in Word to get Kashida (it has low, medium, and high, IIRC and low always uses inter-word spacing).
Created attachment 182206 [details] Documentation on Syriac Justified-Alignment
I've added a new document "Documentation on Syriac Justified-Alignment" which should help with the rules. It was provided to me by a friend of mine whom I consider to be an expert in the language.
Created attachment 182208 [details] Corrected sample document I've corrected the sample document, the RTL was not set on the first syriac line. This mistake makes both the odt sample and the docx sample obsolete.
Created attachment 182209 [details] Corrected sample document: pdf output from libreoffice
This reddit post might contain helpful resources for implementing Kashida justification: https://www.reddit.com/r/arabic_linux/comments/x8wwxa/kashida_justification/
(In reply to AvidSeeker from comment #19) I didn't see any Syriac-specific resources there...