X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fcurs_addch.3x;h=151c3160c4c8d1322b956a8fdab8f7228807cf16;hp=d8b645d7c35983dd86b08eb41f1c258d3e4d1092;hb=d62b54c082a8564aa0c715cddadb1160498b057f;hpb=027ae42953e3186daed8f3882da73de48291b606 diff --git a/man/curs_addch.3x b/man/curs_addch.3x index d8b645d7..151c3160 100644 --- a/man/curs_addch.3x +++ b/man/curs_addch.3x @@ -1,6 +1,6 @@ '\" t .\"*************************************************************************** -.\" Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. * +.\" Copyright (c) 1998-2015,2017 Free Software Foundation, Inc. * .\" * .\" Permission is hereby granted, free of charge, to any person obtaining a * .\" copy of this software and associated documentation files (the * @@ -27,12 +27,22 @@ .\" authorization. * .\"*************************************************************************** .\" -.\" $Id: curs_addch.3x,v 1.25 2006/12/02 17:02:22 tom Exp $ +.\" $Id: curs_addch.3x,v 1.41 2017/05/05 18:15:29 tom Exp $ .TH curs_addch 3X "" +.ie \n(.g .ds `` \(lq +.el .ds `` `` +.ie \n(.g .ds '' \(rq +.el .ds '' '' +.de bP +.IP \(bu 4 +.. .SH NAME -\fBaddch\fR, \fBwaddch\fR, \fBmvaddch\fR, \fBmvwaddch\fR, +\fBaddch\fR, +\fBwaddch\fR, +\fBmvaddch\fR, +\fBmvwaddch\fR, \fBechochar\fR, -\fBwechochar\fR - add a character (with attributes) to a \fBcurses\fR window, then advance the cursor +\fBwechochar\fR \- add a character (with attributes) to a \fBcurses\fR window, then advance the cursor .SH SYNOPSIS \fB#include \fR .PP @@ -49,24 +59,39 @@ \fBint wechochar(WINDOW *win, const chtype ch);\fR .br .SH DESCRIPTION +.SS Adding characters The \fBaddch\fR, \fBwaddch\fR, \fBmvaddch\fR and \fBmvwaddch\fR routines put the character \fIch\fR into the given window at its current window position, -which is then advanced. They are analogous to \fBputchar\fR in \fBstdio\fR(3). -If the advance is at the right margin, the cursor automatically wraps to the -beginning of the next line. At the bottom of the current scrolling region, if -\fBscrollok\fR is enabled, the scrolling region is scrolled up one line. +which is then advanced. They are analogous to \fBputchar\fR(3) in \fBstdio\fR(3). +If the advance is at the right margin: +.bP +The cursor automatically wraps to the beginning of the next line. +.bP +At the bottom of the current scrolling region, +and if \fBscrollok\fR is enabled, +the scrolling region is scrolled up one line. +.bP +If \fBscrollok\fR 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 .PP -If \fIch\fR is a tab, newline, or backspace, -the cursor is moved appropriately within the window. +If \fIch\fR is a tab, newline, carriage return or backspace, +the cursor is moved appropriately within the window: +.bP Backspace moves the cursor one character left; at the left edge of a window it does nothing. +.bP +Carriage return moves the cursor to the window left margin on the current line. +.bP Newline does a \fBclrtoeol\fR, then moves the cursor to the window left margin on the next line, scrolling the window if on the last line. +.bP Tabs are considered to be at every eighth column. The tab interval may be altered by setting the \fBTABSIZE\fR variable. .PP -If \fIch\fR is any control character other than tab, newline, or backspace, it +If \fIch\fR is any other control character, it is drawn in \fB^\fR\fIX\fR notation. Calling \fBwinch\fR after adding a control character does not return the character itself, but instead returns the ^-representation of the control character. @@ -74,12 +99,13 @@ the ^-representation of the control character. Video attributes can be combined with a character argument passed to \fBaddch\fR or related functions by logical-ORing them into the character. (Thus, text, including attributes, can be copied from one place to another -using \fBinch\fR and \fBaddch\fR.) See the \fBcurs_attr\fR(3X) page for +using \fBinch\fR(3X) and \fBaddch\fR.) See the \fBcurs_attr\fR(3X) page for values of predefined video attribute constants that can be usefully OR'ed into characters. +.SS Echoing characters .PP The \fBechochar\fR and \fBwechochar\fR routines are equivalent to a call to -\fBaddch\fR followed by a call to \fBrefresh\fR, or a call to \fBwaddch\fR +\fBaddch\fR followed by a call to \fBrefresh\fR(3X), or a call to \fBwaddch\fR followed by a call to \fBwrefresh\fR. The knowledge that only a single character is being output is used and, for non-control characters, a considerable performance gain may be seen by using these routines instead of @@ -87,53 +113,62 @@ their equivalents. .SS Line Graphics The following variables may be used to add line drawing characters to the screen with routines of the \fBaddch\fR family. The default character listed -below is used if the \fBacsc\fR capability doesn't define a terminal-specific -replacement for it. +below is used if the \fBacsc\fR capability does not define a terminal-specific +replacement for it, +or if the terminal and locale configuration requires Unicode but the +library is unable to use Unicode. +.PP The names are taken from VT100 nomenclature. .PP .TS -l l l -_ _ _ -l l l. -\fIName\fR \fIDefault\fR \fIDescription\fR -ACS_BLOCK # solid square block -ACS_BOARD # board of squares -ACS_BTEE + bottom tee -ACS_BULLET o bullet -ACS_CKBOARD : checker board (stipple) -ACS_DARROW v arrow pointing down -ACS_DEGREE ' degree symbol -ACS_DIAMOND + diamond -ACS_GEQUAL > greater-than-or-equal-to -ACS_HLINE - horizontal line -ACS_LANTERN # lantern symbol -ACS_LARROW < arrow pointing left -ACS_LEQUAL < less-than-or-equal-to -ACS_LLCORNER + lower left-hand corner -ACS_LRCORNER + lower right-hand corner -ACS_LTEE + left tee -ACS_NEQUAL ! not-equal -ACS_PI * greek pi -ACS_PLMINUS # plus/minus -ACS_PLUS + plus -ACS_RARROW > arrow pointing right -ACS_RTEE + right tee -ACS_S1 - scan line 1 -ACS_S3 - scan line 3 -ACS_S7 - scan line 7 -ACS_S9 \&_ scan line 9 -ACS_STERLING f pound-sterling symbol -ACS_TTEE + top tee -ACS_UARROW ^ arrow pointing up -ACS_ULCORNER + upper left-hand corner -ACS_URCORNER + upper right-hand corner -ACS_VLINE | vertical line +l l l l +l l l l +_ _ _ _ +l l l l. +\fBACS\fR \fBACS\fR \fBacsc\fP \fBGlyph\fR +\fBName\fR \fBDefault\fR \fBchar\fP \fBName\fR +ACS_BLOCK # 0 solid square block +ACS_BOARD # h board of squares +ACS_BTEE + v bottom tee +ACS_BULLET o ~ bullet +ACS_CKBOARD : a checker board (stipple) +ACS_DARROW v . arrow pointing down +ACS_DEGREE ' f degree symbol +ACS_DIAMOND + ` diamond +ACS_GEQUAL > > greater-than-or-equal-to +ACS_HLINE \- q horizontal line +ACS_LANTERN # i lantern symbol +ACS_LARROW < , arrow pointing left +ACS_LEQUAL < y less-than-or-equal-to +ACS_LLCORNER + m lower left-hand corner +ACS_LRCORNER + j lower right-hand corner +ACS_LTEE + t left tee +ACS_NEQUAL ! | not-equal +ACS_PI * { greek pi +ACS_PLMINUS # g plus/minus +ACS_PLUS + n plus +ACS_RARROW > + arrow pointing right +ACS_RTEE + u right tee +ACS_S1 \- o scan line 1 +ACS_S3 \- p scan line 3 +ACS_S7 \- r scan line 7 +ACS_S9 \&_ s scan line 9 +ACS_STERLING f } pound-sterling symbol +ACS_TTEE + w top tee +ACS_UARROW ^ \- arrow pointing up +ACS_ULCORNER + l upper left-hand corner +ACS_URCORNER + k upper right-hand corner +ACS_VLINE | x vertical line .TE .SH RETURN VALUE All routines return the integer \fBERR\fR upon failure and \fBOK\fR on success -(the SVr4 manuals specify only "an integer value other than \fBERR\fR") upon -successful completion, unless otherwise noted in the preceding routine -descriptions. +(the SVr4 manuals specify only +\*(``an integer value other than \fBERR\fR\*('') upon successful completion, +unless otherwise noted in the preceding routine descriptions. +.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. .SH NOTES Note that \fBaddch\fR, \fBmvaddch\fR, \fBmvwaddch\fR, and \fBechochar\fR may be macros. @@ -141,6 +176,10 @@ Note that \fBaddch\fR, \fBmvaddch\fR, \fBmvwaddch\fR, and All these functions are described in the XSI Curses standard, Issue 4. The defaults specified for forms-drawing characters apply in the POSIX locale. .LP +X/Open Curses states that the \fIACS_\fP definitions are \fBchar\fP constants. +For the wide-character implementation (see \fBcurs_add_wch\fP), +there are analogous \fIWACS_\fP definitions which are \fBcchar_t\fP constants. +.LP Some ACS symbols (ACS_S3, ACS_S7, @@ -155,6 +194,18 @@ include \fBacsc\fR strings in which their key characters (pryz{|}) are embedded, and a second-hand list of their character descriptions has come to light. The ACS-prefixed names for them were invented for \fBncurses\fR(3X). .LP +The \fIdisplayed\fP values for the \fIACS_\fP and \fIWACS_\fP constants +depend on +.bP +the library configuration, i.e., \fBncurses\fP versus \fBncursesw\fP, +where the latter is capable of displaying Unicode while the former is not, and +.bP +whether the \fIlocale\fP uses UTF-8 encoding. +.LP +In certain cases, the terminal is unable to display line-drawing characters +except by using UTF-8 (see the discussion of \fBNCURSES_NO_UTF8_ACS\fP in +ncurses(3X)). +.LP The \fBTABSIZE\fR variable is implemented in some versions of curses, but is not part of X/Open curses. .LP @@ -168,14 +219,9 @@ This is true of other implementations, but is not documented. \fBcurs_inch\fR(3X), \fBcurs_outopts\fR(3X), \fBcurs_refresh\fR(3X), -\fBputc\fR(3S). +\fBcurs_variables\fR(3X), +\fBputc\fR(3). .PP Comparable functions in the wide-character (ncursesw) library are described in \fBcurs_add_wch\fR(3X). -.\"# -.\"# The following sets edit modes for GNU EMACS -.\"# Local Variables: -.\"# mode:nroff -.\"# fill-column:79 -.\"# End: