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authorMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-02 15:02:49 +0100
committerMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-02 15:02:49 +0100
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tree4361edef0d42d5bf5ac984ef72b4fac35426eae7 /nx-X11/programs/xterm/testxmc.c
parent0d5a83e986f39982c0924652a3662e60b1f23162 (diff)
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-/* $XTermId: testxmc.c,v 1.30 2005/08/05 01:25:40 tom Exp $ */
-
-/*
- * $XFree86: xc/programs/xterm/testxmc.c,v 3.13 2005/08/05 01:25:40 dickey Exp $
- */
-
-/************************************************************
-
-Copyright 1997-2004,2005 by Thomas E. Dickey
-
- All Rights Reserved
-
-Permission is hereby granted, free of charge, to any person obtaining a
-copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be included
-in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
-CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name(s) of the above copyright
-holders shall not be used in advertising or otherwise to promote the
-sale, use or other dealings in this Software without prior written
-authorization.
-
-********************************************************/
-
-/*
- * This module provides test support for curses applications that must work
- * with terminals that have the xmc (magic cookie) glitch. The xmc_glitch
- * resource denotes the number of spaces that are emitted when switching to or
- * from standout (reverse) mode. Some terminals implement this by storing the
- * attribute controls in the character cell that is skipped. So if the cell is
- * overwritten by text, then the attribute change in the cell is cancelled,
- * causing attributes to the left of the change to propagate.
- *
- * We implement the glitch by writing a character that won't be mistaken for
- * other normal characters (and mapping normal writes to that character to a
- * different one).
- *
- * Since xmc isn't normally part of xterm, we document it here rather than in
- * the man-page. This module is driven by resources rather than by the
- * termcap/terminfo description to make it a little more flexible for testing
- * purposes.
- *
- * Resources:
- *
- * xmcGlitch (class XmcGlitch)
- * When true, enables this extension. The default is `0', which disables
- * the module. (termcap sg, terminfo xmc).
- *
- * xmcAttributes (class XmcAttributes)
- * The attributes for which we'll generate a glitch, as a bitmask.
- *
- * INVERSE 1
- * UNDERLINE 2
- * BOLD 4
- * BLINK 8
- *
- * The default is `1' (INVERSE). Some terminals emit glitches for
- * underline. Just for completeness, we recognize all of the video
- * attributes.
- *
- * xmcInline (class XmcInline)
- * When true, limits the extent of an SGR change to the current line.
- * The default is `false'. (No termcap or terminfo equivalent, though
- * there are comments in some entries relating to this issue).
- *
- * xmcMoveSGR (class XmcMoveSGR)
- * When false, a cursor movement will leave a glitch when SGR's are
- * active. The default is `true'. (termcap ms, terminfo msgr).
- *
- * TODO:
- * When xmc is active, the terminfo max_attributes (ma) capability is
- * assumed to be 1.
- *
- * The xmcAttributes resource should also apply to alternate character
- * sets and to color.
- */
-
-#include <xterm.h>
-#include <data.h>
-
-#define MARK_ON(a) (my_attrs & a) != 0 && (term->flags & (whichone = a)) == 0
-#define MARK_OFF(a) (my_attrs & a) != 0 && (term->flags & (whichone = a)) != 0
-
-void
-Mark_XMC(TScreen * screen, int param)
-{
- static IChar *glitch;
- Bool found = False;
- Char my_attrs = (screen->xmc_attributes & XMC_FLAGS);
- Char whichone = 0;
-
- if (glitch == 0) {
- unsigned len = screen->xmc_glitch;
- glitch = TypeMallocN(IChar, len);
- while (len--)
- glitch[len] = XMC_GLITCH;
- }
- switch (param) {
- case -1: /* DEFAULT */
- case 0: /* FALLTHRU */
- found = MARK_OFF((term->flags & XMC_FLAGS));
- break;
- case 1:
- found = MARK_ON(BOLD);
- break;
- case 4:
- found = MARK_ON(UNDERLINE);
- break;
- case 5:
- found = MARK_ON(BLINK);
- break;
- case 7:
- found = MARK_ON(INVERSE);
- break;
- case 22:
- found = MARK_OFF(BOLD);
- break;
- case 24:
- found = MARK_OFF(UNDERLINE);
- break;
- case 25:
- found = MARK_OFF(BLINK);
- break;
- case 27:
- found = MARK_OFF(INVERSE);
- break;
- }
-
- /*
- * Write a glitch with the attributes temporarily set to the new(er)
- * ones.
- */
- if (found) {
- unsigned save = term->flags;
- term->flags ^= whichone;
- TRACE(("XMC Writing glitch (%d/%d) after SGR %d\n", my_attrs,
- whichone, param));
- dotext(screen, '?', glitch, screen->xmc_glitch);
- term->flags = save;
- }
-}
-
-/*
- * Force a glitch on cursor movement when we're in standout mode and not at the
- * end of a line.
- */
-void
-Jump_XMC(TScreen * screen)
-{
- if (!screen->move_sgr_ok
- && screen->cur_col <= CurMaxCol(screen, screen->cur_row)) {
- Mark_XMC(screen, -1);
- }
-}
-
-/*
- * After writing text to the screen, resolve mismatch between the current
- * location and any attributes that would have been set by preceding locations.
- */
-void
-Resolve_XMC(TScreen * screen)
-{
- Bool changed = False;
- Char start;
- Char my_attrs = (screen->xmc_attributes & XMC_FLAGS);
- int row = screen->cur_row;
- int col = screen->cur_col;
-
- /* Find the preceding cell.
- */
- if (getXtermCell(screen, row, col) != XMC_GLITCH) {
- if (col != 0) {
- col--;
- } else if (!screen->xmc_inline && row != 0) {
- row--;
- col = CurMaxCol(screen, row);
- }
- }
- start = (SCRN_BUF_ATTRS(screen, row)[col] & my_attrs);
-
- /* Now propagate the starting state until we reach a cell which holds
- * a glitch.
- */
- for (;;) {
- if (col < CurMaxCol(screen, row)) {
- col++;
- } else if (!screen->xmc_inline && row < screen->max_row) {
- row++;
- col = 0;
- } else
- break;
- if (getXtermCell(screen, row, col) == XMC_GLITCH)
- break;
- if ((SCRN_BUF_ATTRS(screen, row)[col] & my_attrs) != start) {
- SCRN_BUF_ATTRS(screen, row)[col] = start |
- (SCRN_BUF_ATTRS(screen, row)[col] & ~my_attrs);
- changed = True;
- }
- }
-
- TRACE(("XMC %s (%s:%d/%d) from %d,%d to %d,%d\n",
- changed ? "Ripple" : "Nochange",
- BtoS(term->flags & my_attrs),
- my_attrs, start,
- screen->cur_row, screen->cur_col,
- row, col));
-
- if (changed) {
- ScrnUpdate(screen, screen->cur_row, 0, row + 1 - screen->cur_row,
- MaxCols(screen), True);
- }
-}