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rmk122--Next round on fonts and MCCS (#2280)

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* A revision to the font, Unicode, Tedit, and other modules to implement the MCCS character coding as the standard for internal text strings.  MCCS is a variant of XCCS with arrows switched with circumflex/underscore and $ switched with currency, and allows for additional code assignments over time. :MCCS replaces :XCCS as the default external format, especially for source files.  The file XCCS is removed in favor of the file MCCS, which includes the XCCS external format for backward compatibility.

* This includes a single Medley-font formatted font file for each of the family/size/face display fonts.  The glyph assignments correspond to the MCCS character encoding (except for fonts with idiosyncratic encodings--Hippo, Symbol).  All charsets from legacy font files are included in each file, and the character sets and glyphs in each file have also been extended by offline coercion from related families (e.g. Glyphs not in legacy Terminal are taken from legacy Modern). There should be fewer black boxes, and character-display shouldn't change when you switch fonts.

* The Unicode mapping tables have been redefined to set up correspondences between Unicode and MCCS, not XCCS.  Separate XCCS to/from MCCS mapping functions are provided in the file MCCS; they are no longer included in INTERPRESS.

* TEDIT converts characters in legacy fonts to their new MCCS codes as it reads formatted files, marks the file as MCCS compatible and preserves the new codes on writing.

* Default keyboard assignments produce the MCCS uparrow and leftarrow for shift-6 and shift-hyphen, use Function-6 for circumflex and Function-10 for underscore.

See documentation in FONTCODECHANGES.TEDIT MCCS.TEDIT MEDLEYFONTFORMAT.TEDIT in docs/internal, and library/UNICODE.TEDIT.
This commit is contained in:
rmkaplan
2025-10-20 17:17:34 -07:00
committed by GitHub
parent 54353a4bef
commit 82fc95ce18
401 changed files with 8871 additions and 6601 deletions
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24
unicode/xerox/UNICODE-MAPPINGS.TXT → unicode/xerox/MCCS-TO-UNICODE-MAPPINGS.TXT
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@@ -5,18 +5,18 @@
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41
unicode/xerox/INVERTED-UNICODE-MAPPINGS.TXT → unicode/xerox/UNICODE-TO-MCCS-MAPPINGS.TXT
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@@ -1,27 +1,28 @@
[0 ((0 0) (1 1) (2 2) (3 3) (4 4) (5 5) (6 6) (7 7) (8 8) (9 9) (10 10) (11 11) (12 12) (13 13) (14 14
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21
unicode/xerox/XCCS-0=LATIN.TXT
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@@ -43,20 +43,20 @@
# "0" LATIN
0x0000 0x0000 # ^@
0x0000 0x0000 # ^@ NULL
0x0001 0x0001 # ^A
0x0002 0x0002 # ^B
0x0003 0x0003 # ^C
0x0004 0x0004 # ^D
0x0005 0x0005 # ^E
0x0006 0x0006 # ^F
0x0007 0x0007 # ^G
0x0008 0x0008 # ^H
0x0009 0x0009 # ^I
0x000A 0x000A # ^J
0x000B 0x000B # ^K
0x000C 0x000C # ^L
0x000D 0x000D # ^M
0x0007 0x0007 # ^G BELL
0x0008 0x0008 # ^H BS
0x0009 0x0009 # ^I TAB
0x000A 0x000A # ^J LF
0x000B 0x000B # ^K VTAB
0x000C 0x000C # ^L FORM
0x000D 0x000D # ^M CR
0x000E 0x000E # ^N
0x000F 0x000F # ^O
0x0010 0x0010 # ^P
@@ -70,7 +70,7 @@
0x0018 0x0018 # ^X
0x0019 0x0019 # ^Y
0x001A 0x001A # ^Z
0x001B 0x001B # ^[
0x001B 0x001B # ^[ ESCAPE
0x001C 0x001C # ^\
0x001D 0x001D # ^]
0x001E 0x001E # ^^
@@ -79,8 +79,7 @@
0x0021 0x0021 # ! EXCLAMATION MARK
0x0022 0x0022 # " QUOTATION MARK
0x0023 0x0023 # # NUMBER SIGN
# 0x0024 0x00A4 # ¤ CURRENCY SIGN
0x0024 0x0024 # $ DOLLAR SIGN
0x0024 0x00A4 # ¤ CURRENCY SIGN
0x0025 0x0025 # % PERCENT SIGN
0x0026 0x0026 # & AMPERSAND
0x0027 0x0027 # ' APOSTROPHE