Unicode, character encodings in programming and standard persian keyboard layout
description
Transcript of Unicode, character encodings in programming and standard persian keyboard layout
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ککد یون
“The Unicode”
جلسه باز نرم افزاری مشهد،
۹۲ اسفند ۴
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پیشگفتار“The Introduction”
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ککدچرا ؟یون “Why Unicode?”
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م کنید …فکراگر “if you think ...”
ASCIIمتن ساده
ککد انکدینگ ( بایت�)۲ یون
کیبورد فارس مایکروسافت مناسب فارس نویس است
یا برای فارس نویس نیاز به ابزار فرمت بندی است
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…حالاگر تا “If by now ...”
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انکدینگ کاراکتر“The Character Encoding”
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چیست؟انکدینگ کاراکتر “What is The Character Encoding?”
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A BC
DE
F
G
HI
J
K
LM
N
O P
Q
R
S
T
U
V
Wx
Y
Z
0100110011011001011010010010001110101010110100110011000001100101010101000100111101101101001011010010101011110101010101010101
?!
#
<
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ککدتاریخچه یون “The unicode History”
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ااسکانکدینگ “ASCII Encoding”
کاراکتر�)۱۲۸ بیت (۷✔ کاراکتر کنترل۳۳✔ کاراکتر چاپ۹۵✔ بیت اضافی۱✔
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بیت اضافیاسک و “ASCII and the extra bit”
بیت۸گسترش سیستم های ✔بیت مورد علهقه توسعه دهندگان✔
7 6 5 4 3 2 1
x x x x x x x♥
کاراکتر اضافی۱۲۸
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بیت اضافیاسک و “ASCII and the extra bit”
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ککدپیج ها و تولد آنس“ANSI and The birth of the Code Pages”
CP437 (IBM) CP1256 (Arabic)
Fix
edC
ode p
age
depe
nden
t
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ککدپیج هامشکل ت “Code Pages Problems”
چندزبانه سازی عمل غیرممکن بود✔مشکل در ارتباط با سیستم های مختلف دیگر✔نامناسب برای زبان های آسیای✔
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$ python>>> print chr(202).decode('cp437')╩>>> print chr(202).decode('cp1256')ت>>>
کاراکتر کدپیج هاتفاو ت میان “Difference between codepages characters”
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ککداستاندارد یون “The Unicode standard”
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English
العربية
فارس
עברית
日本語
Slovenščina
Հայերեն Русский
中文 Polski
Български ...
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ککداستاندارد یون “The Unicode standard”
A Code PointU+hexadecimal
Basic Latin
Uppercase
Letter
Left to Right
Whitespace
Lowercase
Digit
ISO Control
Mirrored
AlphaNumeric
...
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$ python>>> import unicodedata as ud>>> ud.name(u”ب”)'ARABIC LETTER BEH'>>> ud.category(u”ب”)'Lo'>>> ud.numeric(u” ”۳ )3.0>>>
خصوصیا ت کاراکترهایککد یون
“Unicode characters properties”
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ککداستاندارد یون “The Unicode standard”
Code PointU+hexadecimal
0100110011011001011010010010001110101010110100110011000001100101010101000100111101101101001011010010101011110101010101010101
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ککدانکدینگ های یون “The Unicode encodings”
“Hello” U+0048 U+0065 U+006C U+006C U+006F
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ککدانکدینگ های یون “The Unicode encodings”
“Hello” U+0048 U+0065 U+006C U+006C U+006F
0048 0065 006C 006C 006F
4800 6500 6C00 6C00 6F00
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ککدانکدینگ های یون “The Unicode encodings”
“Hello” U+0048 U+0065 U+006C U+006C U+006F
0048 0065 006C 006C 006F low-endian
4800 6500 6C00 6C00 6F00 hi-endian
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ککدانکدینگ های یون “The Unicode encodings”
“Hello” U+0048 U+0065 U+006C U+006C U+006F
0048 0065 006C 006C 006F low-endian
4800 6500 6C00 6C00 6F00 hi-endianByte Order Mark
(BOM)FEFF
FFFE
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ککدانکدینگ های یون “The Unicode encodings”
“Hello” U+0048 U+0065 U+006C U+006C U+006F
0048 0065 006C 006C 006F low-endian
4800 6500 6C00 6C00 6F00 hi-endianFEFF
FFFEByte Order Mark
(BOM)UCS-2
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ککدمشکل ت انکدینگ های یون “The Unicode encodings cons”
عدم بهینگ در فضا با نگهداری بیت های صفر✔عدم سازگاری با انکدینگ اسک✔عدم سازگاری با برنامه های هقدیم✔
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8UTF-انکدینگ “The UTF-8 encoding”
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8UTF- انکدینگ“UTF-8 encoding”
طول متغیر
Bites First Last Bytes Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6
7 U+000 U+007F 1 0xxxxxxx
11 U+0080 U+07FF 2 110xxxxx 10xxxxxx
16 U+0800 U+FFFF 3 1110xxxx 10xxxxxx 10xxxxxx
21 U+10000 U+1FFFFF 4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
26 U+200000 U+3FFFFFF 5 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
31 U+400000 U+7FFFFFFF 6 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
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8UTF- انکدینگ“UTF-8 encoding”
بایت مقدمبایت های ادامه
معرف تعداد بایت های ادامه
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 60xxxxxxx
110xxxxx 10xxxxxx
1110xxxx 10xxxxxx 10xxxxxx
11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
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8UTFمزایای انکدینگ “The UTF8 encoding pros”
بهینه در نگهداری فضا✔هقابلیت کشف خطا✔سازگاری کامل با انکدینگ اسک✔
ASCII “Hello” 48 65 6 6 6C C F-8 UTF “Hello ” 48 65 6 6 6C C F
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ککددیگر انکدینگ های یون “Other unicode encodings”
✔ UCS-2 (LE-BE) + BOM✔ UTF-16 (LE-BE) + BOM✔ UTF-32 (LE-BE) + BOM✔ UTF-7
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$ python>>> unichr(202).encode('utf-16le')'\xca\x00'>>> unichr(202).encode('utf-16be')'\x00\xca'>>> unichr(202).encode('utf-16')'\xff\xfe\xca\x00'>>> unichr(202).encode('utf-32')'\xff\xfe\x00\x00\xca\x00\x00\x00'>>> unichr(202).encode('utf-7')'+AMo-'
ککددیگر انکدینگ های یون “Other unicode encodings”
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انکدینگ هاتبدیل“Character Encodings conversion”
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طلیئنکتهیک “A Golden note”
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«در حافظه چیزی به نام وجود ندارد»متن ساده
”There's nothing as plain text on memory”
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«داشتن یک رشته بدون آن نوع اندینگدانستن
ب معن است»”It does not make sense to have a string without
knowing what encoding it uses”
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انکدینگ نوع ارسال. ۱“Sending the encoding type”
✔ HTTP Content-Type: text/html; charset=UTF-8
✔ HTML 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
✔ HTML 5 <meta charset="UTF-8">
✔ XML <xml encoding="UTF-8">
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$ curl -I http://google.comHTTP/1.1 301 Moved PermanentlyLocation: http://www.google.com/Content-Type: text/html; charset=UTF-8Date: Mon, 24 Feb 2014 12:32:10 GMTExpires: Wed, 26 Mar 2014 12:32:10 GMTCache-Control: public, max-age=2592000Server: gwsContent-Length: 219X-XSS-Protection: 1; mode=blockX-Frame-Options: SAMEORIGIN$
انکدینگ نوع ارسال. ۱“Sending the encoding type”
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نوع انکدینگشناسای. ۲“Detecting the encoding type”
https://en.wikipedia.org/wiki/Charset_detection
http://www-archive.mozilla.org/projects/intl/UniversalCharsetDetection.html
نوع انکدینگ مشخص نیست✔اطلعا ت نوع انکدینگ هقابل اطمینان نیست✔
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موزیلراهکار شناسای انکدینگ “Mozilla universal charset detection”
https://en.wikipedia.org/wiki/Charset_detection
http://www-archive.mozilla.org/projects/intl/UniversalCharsetDetection.html
ککد✔ ششمای نسبت توزیع حروف✔نسبت توزیع دو حرف متوال✔
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$ python>>> import chardet>>> "hello world".encode("utf16")'\xff\xfeh\x00e\x00l\x00l\x00o\x00 \x00w\x00o\x00r\x00l\x00d\x00'>>> chardet.detect(“\xff\xfeh\x00e\x00l\x00l\x00o \x00\x00w\x00o\x00r\x00l\x00d\x00”){'confidence': 1.0, 'encoding': 'UTF-16LE'}>>>
موزیلراهکار شناسای انکدینگ “Mozilla universal charset detection”
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نوع انکدینگ!حدس زدن. ۳“Guess the type of encoding!”
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ککداستفاده از در یون همه جا کافی است؟
“is using unicode in everywhere enough?”
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$ str=”تسويه قبوض آب”$ dec2hex(){ echo “obase=16; $1” | bc }$ echo $str | grep -o “[0-9]*” | while read num; do echo -n “\x`dec2hex #num`”; done | chardet<stdin>: utf-8 (confidence: 0.99)$ python>>> real_string = (chr(216)+chr(170)+chr(216)+chr(179)+...).decode(“utf8”).encode(“ascii”, “xmlcharrefreplace”)>>> real_string'تسويهقبوضآب'>>> print real_string
رضوي خراسان استان روستائي آب قبوض تسويه>>>
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همیشه شما تنها نیستید!تولیدکننده محتوا
“You're not always the only content producer!”
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ککد و چندزبانیون “Unicode and multilingual”
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دوجهتمتن “Bi-Directional Text”
RTLLTR
Bi-«این یک متن Directional«م باشد RTL
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کاراکترهاجهت“Character's directional”
کاراکترهای خنثNeutral Characters
کاراکترهای هقویStrong Characters
کاراکترهای ضعیفWeak Characters
فاصله های خالعلیم نگارش
حروف الفبا اعداد
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فارسکیبورد استاندارد “Persian standard keyboard”
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و استانداردمؤسسه تحقیقا ت صنعت ایران
“Institute of StandardsAnd Industrial Research of Iran”
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استانداردهای ملصفحه آرای (کیبورد�) فارس
“National standards of persian layout”
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ISIRI 820
«حروف فارس درماشین تحریر»
۱۳۵۲
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ISIRI 2901
«طرز هقرارگرفتن حروف و علیم زبان فارس بر روی
صفحه کلید»
۱۳۷۳
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ISIRI 9147
«چیدمان حروف و علیم فارس بر صفحه کلید
رایانه»
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۹۱۴۷استاندارد مل “ISIRI 9147”
ککد✔ مبتن بر استاندارد یون ۲۹۰۱سازگار با استاندارد ✔۶۲۱۹نویسه های استاندارد شده ✔دستور خط فارس مصوب فرهنگستان زبان و ادب✔
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فارس کیبورد استاندارد“Persian standard keyboard”
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فارس کیبورد استاندارد“Persian standard keyboard”
HTMLکد ککد ککد پوینت یونی ککد کاراکتر یونی نام‍ U+200d ZERO WIDTH
JOINERاتصال مجازی
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۱سطح مثال های از کیبورد استاندارد فارس
ب
ب ب `بب
ب
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۱سطح مثال های از کیبورد استاندارد فارس
1 2 1
122
۱۲Num Lock Num Lock
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فارس کیبورد استاندارد“Persian standard keyboard”
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فارس کیبورد استاندارد“Persian standard keyboard”
HTMLکد ککد ککد پوینت یونی ککد کاراکتر یونی نام‍ U+200d ZERO WIDTH
JOINERاتصال مجازی
‌ U+200c ZERO WIDTH NON-JOINER
فاصله مجازی
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۲سطح مثال های از کیبورد استاندارد فارس
دوشیم
میشود
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۲سطح مثال های از کیبورد استاندارد فارس
دوشSpaceیم
م شود
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۲سطح مثال های از کیبورد استاندارد فارس
دوشShiftSpaceیم +
م شود
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۲سطح مثال های از کیبورد استاندارد فارس
“لوقلقن“
”نقل هقول “
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۲سطح مثال های از کیبورد استاندارد فارس
L Shift+لقن
K Shift+
«نقل هقول»
لوق
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فارس کیبورد استاندارد“Persian standard keyboard”
![Page 70: Unicode, character encodings in programming and standard persian keyboard layout](https://reader036.fdocuments.net/reader036/viewer/2022081720/5560f9fed8b42a424d8b4c3a/html5/thumbnails/70.jpg)
فارس کیبورد استاندارد“Persian standard keyboard”
HTMLکد ککد ککد پوینت یونی ککد کاراکتر یونی نام‏ U+200f RIGHT-TO-LEFT
MARKنشانه راست به چپ
‎ U+200e LEFT-TO-RIGHT MARK
نشانه چپ به راست
‫ U+202b RIGHT-TO-LEFT EMBEDDING
زیر متن راست به چپ
‪ U+202a LEFT-TO-RIGHT EMBEDDING
زیر متن چپ به راست
‬ U+202c POP DIRECTIONAL FORMATTING
پایان زیر متن
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فارس کیبورد استاندارد“Persian standard keyboard”
HTMLکد ککد ککد پوینت یونی ککد کاراکتر یونی نام‮ U+202e RIGHT-TO-LEFT
OVERRIDEزیرمتن اکیدا راست به
چپ
‭ U+202d RIGHT-TO-LEFT OVERRIDE
زیرمتن اکیدا چپ به راست
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۳سطح مثال های از کیبورد استاندارد فارس
...و Space
و ...
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۳سطح مثال های از کیبورد استاندارد فارس
m Right Alt+
و …و
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۳سطح مثال های از کیبورد استاندارد فارس
Helloعمهب
مالس یان
Hello به معنای سلم
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۳سطح مثال های از کیبورد استاندارد فارس
Helloب
السعمه
م
یان
Helloبه معنای سلم 0 right Alt+
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۳سطح مثال های از کیبورد استاندارد فارس
ویارددراو
دیوش c:/
:/ شویدcوارد درایو
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۳سطح مثال های از کیبورد استاندارد فارس
ویارددراو
دیوش
[ right Alt+c:/
شویدc/:وارد درایو
p right Alt+
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کیبورد استاندارد فارس و سازگاری با گذشته
Persian Standard keyboardand backward compatibility
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شماوهقت و حوصلهبا تشکر از
Thank you for your time and patience
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پاسخ و پرسش
“Question/Answer”
ککد یون
توسط بیژن ابراهیم