A common full-width to half-width rule（常见全角转半角规则）

[Zrief]

This is a ruleset which could convert full-width characters into half-width characters (just A-Z, a-z, 0-9, [, ] ). The ruleset will be useful when copying from Chinese PDF.
(一个将全角常见字符转换成半角的规则(只有 A-Z, a-z, 0-9, [, ] )，在复制PDF或者网页的论文时会比较有用。)

“full-width characters” -> “half-width characters”

"Ａ"->"A"
"Ｂ"->"B"
"Ｃ"->"C"
"Ｄ"->"D"
"Ｅ"->"E"
"Ｆ"->"F"
"Ｇ"->"G"
"Ｈ"->"H"
"Ｉ"->"I"
"Ｊ"->"J"
"Ｋ"->"K"
"Ｌ"->"L"
"Ｍ"->"M"
"Ｎ"->"N"
"Ｏ"->"O"
"Ｐ"->"P"
"Ｑ"->"Q"
"Ｒ"->"R"
"Ｓ"->"S"
"Ｔ"->"T"
"Ｕ"->"U"
"Ｖ"->"V"
"Ｗ"->"W"
"Ｘ"->"X"
"Ｙ"->"Y"
"Ｚ"->"Z"
"ａ"->"a"
"ｂ"->"b"
"ｃ"->"c"
"ｄ"->"d"
"ｅ"->"e"
"ｆ"->"f"
"ｇ"->"g"
"ｈ"->"h"
"ｉ"->"i"
"ｊ"->"j"
"ｋ"->"k"
"ｌ"->"l"
"ｍ"->"m"
"ｎ"->"n"
"ｏ"->"o"
"ｐ"->"p"
"ｑ"->"q"
"ｒ"->"r"
"ｓ"->"s"
"ｔ"->"t"
"ｕ"->"u"
"ｖ"->"v"
"ｗ"->"w"
"ｘ"->"x"
"ｙ"->"y"
"ｚ"->"z"
"１"->"1"
"２"->"2"
"３"->"3"
"４"->"4"
"５"->"5"
"６"->"6"
"７"->"7"
"８"->"8"
"９"->"9"
"０"->"0"
"［"->"["
"］"->"]"