X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fcurs_add_wch.3x;h=01fd9225e0217f5baf7b6a931fe71c2c60c17133;hp=374597b41625dedf4b79c20465c69f26a27e5534;hb=HEAD;hpb=084e3b44fc1c904d5ab941da55f47a237cb15766 diff --git a/man/curs_add_wch.3x b/man/curs_add_wch.3x index 374597b4..d1eb9a31 100644 --- a/man/curs_add_wch.3x +++ b/man/curs_add_wch.3x @@ -1,6 +1,6 @@ '\" t .\"*************************************************************************** -.\" Copyright 2019-2021,2023 Thomas E. Dickey * +.\" Copyright 2019-2023,2024 Thomas E. Dickey * .\" Copyright 2001-2015,2017 Free Software Foundation, Inc. * .\" * .\" Permission is hereby granted, free of charge, to any person obtaining a * @@ -28,8 +28,8 @@ .\" authorization. * .\"*************************************************************************** .\" -.\" $Id: curs_add_wch.3x,v 1.48 2023/11/25 14:20:05 tom Exp $ -.TH curs_add_wch 3X 2023-11-25 "ncurses 6.4" "Library calls" +.\" $Id: curs_add_wch.3x,v 1.62 2024/04/20 21:20:07 tom Exp $ +.TH curs_add_wch 3X 2024-04-20 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls" .ie \n(.g \{\ .ds `` \(lq .ds '' \(rq @@ -106,7 +106,7 @@ The \fBecho_wchar\fP function is functionally equivalent to a call to \fBadd_wch\fP followed by a call to -\fBrefresh\fP(3X). +\fB\%refresh\fP(3X). Similarly, the \fBwecho_wchar\fP is functionally equivalent to a call to @@ -117,100 +117,171 @@ The knowledge that only a single character is being output is taken into consideration and, for non-control characters, a considerable performance gain might be seen by using the *\fBecho\fP* functions instead of their equivalents. -.SS Line Graphics -Like \fBaddch\fP(3X), +.SS "Line Graphics" +Like \fB\%addch\fP(3X), \fBaddch_wch\fP accepts symbols which make it simple to draw lines and other frequently used special characters. These symbols correspond to the same VT100 line-drawing set as -\fBaddch\fP(3X). +\fB\%addch\fP(3X). .PP .TS -l l l l l -l l l l l -_ _ _ _ _ -lw(1.5i) lw5 lw5 lw5 lw20. -\fBACS\fP \fBUnicode\fP \fBASCII\fP \fBacsc\fP \fBGlyph\fP -\fBName\fP \fBDefault\fP \fBDefault\fP \fBchar\fP \fBName\fP -WACS_BLOCK 0x25ae # 0 solid square block -WACS_BOARD 0x2592 # h board of squares -WACS_BTEE 0x2534 + v bottom tee -WACS_BULLET 0x00b7 o ~ bullet -WACS_CKBOARD 0x2592 : a checker board (stipple) -WACS_DARROW 0x2193 v . arrow pointing down -WACS_DEGREE 0x00b0 ' f degree symbol -WACS_DIAMOND 0x25c6 + \(ga diamond -WACS_GEQUAL 0x2265 > > greater-than-or-equal-to -WACS_HLINE 0x2500 \- q horizontal line -WACS_LANTERN 0x2603 # i lantern symbol -WACS_LARROW 0x2190 < , arrow pointing left -WACS_LEQUAL 0x2264 < y less-than-or-equal-to -WACS_LLCORNER 0x2514 + m lower left-hand corner -WACS_LRCORNER 0x2518 + j lower right-hand corner -WACS_LTEE 0x2524 + t left tee -WACS_NEQUAL 0x2260 ! | not-equal -WACS_PI 0x03c0 * { greek pi -WACS_PLMINUS 0x00b1 # g plus/minus -WACS_PLUS 0x253c + n plus -WACS_RARROW 0x2192 > + arrow pointing right -WACS_RTEE 0x251c + u right tee -WACS_S1 0x23ba \- o scan line 1 -WACS_S3 0x23bb \- p scan line 3 -WACS_S7 0x23bc \- r scan line 7 -WACS_S9 0x23bd \&_ s scan line 9 -WACS_STERLING 0x00a3 f } pound-sterling symbol -WACS_TTEE 0x252c + w top tee -WACS_UARROW 0x2191 ^ \- arrow pointing up -WACS_ULCORNER 0x250c + l upper left-hand corner -WACS_URCORNER 0x2510 + k upper right-hand corner -WACS_VLINE 0x2502 | x vertical line +Lb Lb Lb Lb Lb +Lb Lb Lb Lb Lb +Lb L L L Lx. +\& Unicode ASCII acsc \& +ACS Name Default Default Char Glyph Name +_ +WACS_BLOCK 0x25ae # 0 T{ +solid square block +T} +WACS_BOARD 0x2592 # h board of squares +WACS_BTEE 0x2534 + v bottom tee +WACS_BULLET 0x00b7 o ~ bullet +WACS_CKBOARD 0x2592 : a T{ +checker board (stipple) +T} +WACS_DARROW 0x2193 v . T{ +arrow pointing down +T} +WACS_DEGREE 0x00b0 ' f degree symbol +WACS_DIAMOND 0x25c6 + \(ga diamond +WACS_GEQUAL 0x2265 > > T{ +greater-than-or-equal-to +T} +WACS_HLINE 0x2500 \- q horizontal line +WACS_LANTERN 0x2603 # i lantern symbol +WACS_LARROW 0x2190 < , T{ +arrow pointing left +T} +WACS_LEQUAL 0x2264 < y T{ +less-than-or-equal-to +T} +WACS_LLCORNER 0x2514 + m T{ +lower left-hand corner +T} +WACS_LRCORNER 0x2518 + j T{ +lower right-hand corner +T} +WACS_LTEE 0x2524 + t left tee +WACS_NEQUAL 0x2260 ! | not-equal +WACS_PI 0x03c0 * { greek pi +WACS_PLMINUS 0x00b1 # g plus/minus +WACS_PLUS 0x253c + n plus +WACS_RARROW 0x2192 > + T{ +arrow pointing right +T} +WACS_RTEE 0x251c + u right tee +WACS_S1 0x23ba \- o scan line 1 +WACS_S3 0x23bb \- p scan line 3 +WACS_S7 0x23bc \- r scan line 7 +WACS_S9 0x23bd \&_ s scan line 9 +WACS_STERLING 0x00a3 f } T{ +pound-sterling symbol +T} +WACS_TTEE 0x252c + w top tee +WACS_UARROW 0x2191 ^ \- T{ +arrow pointing up +T} +WACS_ULCORNER 0x250c + l T{ +upper left-hand corner +T} +WACS_URCORNER 0x2510 + k T{ +upper right-hand corner +T} +WACS_VLINE 0x2502 | x vertical line .TE .PP -The wide-character configuration of ncurses also defines symbols +The wide-character configuration of \fI\%ncurses\fP also defines symbols for thick lines (\fBacsc\fP \*(``J\*('' to \*(``V\*(''): .PP .TS -l l l l l -l l l l l -_ _ _ _ _ -lw(1.5i) lw5 lw5 lw5 lw20. -\fBACS\fP \fBUnicode\fP \fBASCII\fP \fBacsc\fP \fBGlyph\fP -\fBName\fP \fBDefault\fP \fBDefault\fP \fBchar\fP \fBName\fP -WACS_T_BTEE 0x253b + V thick tee pointing up -WACS_T_HLINE 0x2501 - Q thick horizontal line -WACS_T_LLCORNER 0x2517 + M thick lower left corner -WACS_T_LRCORNER 0x251b + J thick lower right corner -WACS_T_LTEE 0x252b + T thick tee pointing right -WACS_T_PLUS 0x254b + N thick large plus -WACS_T_RTEE 0x2523 + U thick tee pointing left -WACS_T_TTEE 0x2533 + W thick tee pointing down -WACS_T_ULCORNER 0x250f + L thick upper left corner -WACS_T_URCORNER 0x2513 + K thick upper right corner -WACS_T_VLINE 0x2503 | X thick vertical line +Lb Lb Lb Lb Lb +Lb Lb Lb Lb Lb +Lb L L L Lx. +\& Unicode ASCII acsc \& +ACS Name Default Default Char Glyph Name +_ +WACS_T_BTEE 0x253b + V T{ +thick tee pointing up +T} +WACS_T_HLINE 0x2501 - Q T{ +thick horizontal line +T} +WACS_T_LLCORNER 0x2517 + M T{ +thick lower left corner +T} +WACS_T_LRCORNER 0x251b + J T{ +thick lower right corner +T} +WACS_T_LTEE 0x252b + T T{ +thick tee pointing right +T} +WACS_T_PLUS 0x254b + N T{ +thick large plus +T} +WACS_T_RTEE 0x2523 + U T{ +thick tee pointing left +T} +WACS_T_TTEE 0x2533 + W T{ +thick tee pointing down +T} +WACS_T_ULCORNER 0x250f + L T{ +thick upper left corner +T} +WACS_T_URCORNER 0x2513 + K T{ +thick upper right corner +T} +WACS_T_VLINE 0x2503 | X T{ +thick vertical line +T} .TE .PP and for double-lines (\fBacsc\fP \*(``A\*('' to \*(``I\*(''): .PP .TS -l l l l l -l l l l l -_ _ _ _ _ -lw(1.5i) lw5 lw5 lw5 lw20. -\fBACS\fP \fBUnicode\fP \fBASCII\fP \fBacsc\fP \fBGlyph\fP -\fBName\fP \fBDefault\fP \fBDefault\fP \fBchar\fP \fBName\fP -WACS_D_BTEE 0x2569 + H double tee pointing up -WACS_D_HLINE 0x2550 - R double horizontal line -WACS_D_LLCORNER 0x255a + D double lower left corner -WACS_D_LRCORNER 0x255d + A double lower right corner -WACS_D_LTEE 0x2560 + F double tee pointing right -WACS_D_PLUS 0x256c + E double large plus -WACS_D_RTEE 0x2563 + G double tee pointing left -WACS_D_TTEE 0x2566 + I double tee pointing down -WACS_D_ULCORNER 0x2554 + C double upper left corner -WACS_D_URCORNER 0x2557 + B double upper right corner -WACS_D_VLINE 0x2551 | Y double vertical line +Lb Lb Lb Lb Lb +Lb Lb Lb Lb Lb +Lb L L L Lx. +\& Unicode ASCII acsc \& +ACS Name Default Default Char Glyph Name +_ +WACS_D_BTEE 0x2569 + H T{ +double tee pointing up +T} +WACS_D_HLINE 0x2550 - R T{ +double horizontal line +T} +WACS_D_LLCORNER 0x255a + D T{ +double lower left corner +T} +WACS_D_LRCORNER 0x255d + A T{ +double lower right corner +T} +WACS_D_LTEE 0x2560 + F T{ +double tee pointing right +T} +WACS_D_PLUS 0x256c + E T{ +double large plus +T} +WACS_D_RTEE 0x2563 + G T{ +double tee pointing left +T} +WACS_D_TTEE 0x2566 + I T{ +double tee pointing down +T} +WACS_D_ULCORNER 0x2554 + C T{ +double upper left corner +T} +WACS_D_URCORNER 0x2557 + B T{ +double upper right corner +T} +WACS_D_VLINE 0x2551 | Y T{ +double vertical line +T} .TE .PP -Unicode's descriptions for these characters differs slightly from ncurses, +Unicode's descriptions for these characters differs slightly from +\fI\%ncurses\fP, by introducing the term \*(``light\*('' (along with less important details). Here are its descriptions for the normal, thick, and double horizontal lines: .bP @@ -222,7 +293,7 @@ U+2550 BOX DRAWINGS DOUBLE HORIZONTAL .SH RETURN VALUE All routines return the integer \fBERR\fP upon failure and \fBOK\fP on success. .PP -X/Open does not define any error conditions. +X/Open Curses does not specify any error conditions. This implementation returns an error .bP if the window pointer is null or @@ -231,19 +302,21 @@ if it is not possible to add a complete character in the window. .PP The latter may be due to different causes: .bP -If \fBscrollok\fP(3X) is not enabled, +If \fB\%scrollok\fP(3X) is not enabled, writing a character at the lower right margin succeeds. -However, an error is returned because -it is not possible to wrap to a new line +However, +an error is returned because it is not possible to wrap to a new line. .bP If an error is detected when converting a multibyte character to a sequence of bytes, or if it is not possible to add all of the resulting bytes in the window, an error is returned. .PP -Functions with a \*(``mv\*('' prefix first perform a cursor movement using -\fBwmove\fP, and return an error if the position is outside the window, -or if the window pointer is null. +Functions prefixed with \*(``mv\*('' first perform cursor movement and +fail if the position +.RI ( y , +.IR x ) +is outside the window boundaries. .SH NOTES Note that \fBadd_wch\fP, @@ -252,9 +325,9 @@ Note that \fBecho_wchar\fP may be macros. .SH PORTABILITY -These functions are described in the XSI Curses standard, Issue 4. +These functions are described in X/Open Curses, Issue 4. The defaults specified for line-drawing characters apply in the POSIX locale. -.SS WACS Symbols +.SS "WACS Symbols" X/Open Curses makes it clear that the WACS_ symbols should be defined as a pointer to \fBcchar_t\fP data, e.g., in the discussion of \fBborder_set\fP. A few implementations are problematic: @@ -267,7 +340,7 @@ wide characters. The misdefined symbols are the arrows and other symbols which are not used for line-drawing. .PP -X/Open Curses does not define symbols for thick- or double-lines. +X/Open Curses does not specify symbols for thick- or double-lines. SVr4 curses implementations defined their line-drawing symbols in terms of intermediate symbols. This implementation extends those symbols, providing new definitions @@ -282,14 +355,16 @@ Existing implementations of Unix curses (AIX, HP-UX, Solaris) use only the \fBacsc\fP character-mapping to provide this feature. As a result, those implementations can only use single-byte line-drawing characters. -Ncurses 5.3 (2002) provided a table of Unicode values to solve these problems. +\fI\%ncurses\fP 5.3 (2002) provided a table of Unicode values to solve +these problems. NetBSD curses incorporated that table in 2010. .PP In this implementation, the Unicode values are used instead of the -terminal description's \fBacsc\fP mapping as discussed in ncurses(3X) -for the environment variable \fBNCURSES_NO_UTF8_ACS\fP. +terminal description's \fBacsc\fP mapping as discussed in +\fB\%ncurses\fP(3X) for the environment variable +\fINCURSES_NO_UTF8_ACS\fP. In contrast, for the same cases, the line-drawing characters -described in \fBcurs_addch\fP(3X) will use only the ASCII default values. +described in \fB\%addch\fP(3X) will use only the ASCII default values. .PP Having Unicode available does not solve all of the problems with line-drawing for curses: @@ -330,7 +405,7 @@ Others have suggested these alternatives: \[u2327] U+2327 (x in a rectangle), \[u256C] U+256C (forms double vertical and horizontal), and \[u2612] U+2612 (ballot box with x). -.SS Complex Characters +.SS "Complex Characters" The complex character type \fBcchar_t\fR can store more than one wide character (\fBwchar_t\fR). The X/Open Curses description does not mention this possibility, @@ -338,7 +413,7 @@ describing only the cases where \fIwch\fP is a spacing character or a non-spacing character. .PP This implementation assumes that \fIwch\fP is constructed using -\fBsetcchar\fP(3X), and in turn that the result +\fB\%setcchar\fP(3X), and in turn that the result .bP contains at most one spacing character in the beginning of its list of wide characters, @@ -347,14 +422,28 @@ or .bP may hold one non-spacing character. .PP -In the latter case, ncurses adds the non-spacing character to the active +In the latter case, +\fI\%ncurses\fP adds the non-spacing character to the active (base) spacing character. +.SS TABSIZE +The +.B TABSIZE +variable is implemented in SVr4 and other versions of +.IR curses , +but is not specified by X/Open Curses +(see \fBcurs_variables\fP(3X)). .SH SEE ALSO +\fB\%curs_addch\fP(3X) describes comparable functions of the +.I \%ncurses +library in its non-wide-character configuration. +.PP \fB\%curses\fP(3X), -\fB\%curs_addch\fP(3X), +\fB\%curs_addwstr\fP(3X), +\fB\%curs_add_wchstr\fP(3X), \fB\%curs_attr\fP(3X), \fB\%curs_clear\fP(3X), \fB\%curs_getcchar\fP(3X), \fB\%curs_outopts\fP(3X), \fB\%curs_refresh\fP(3X), +\fB\%curs_variables\fP(3X), \fB\%putwc\fP(3)