734 lines
19 KiB
C
734 lines
19 KiB
C
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/*
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** This module contains functions to support i/o in the TUI
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*/
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#include <stdio.h>
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#include "defs.h"
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#include "terminal.h"
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#include "tui.h"
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#include "tuiData.h"
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#include "tuiIO.h"
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#include "tuiCommand.h"
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#include "tuiWin.h"
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#ifdef ANSI_PROTOTYPES
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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/* The Solaris header files seem to provide no declaration for this at
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all when __STDC__ is defined. This shouldn't conflict with
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anything. */
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extern char *tgoto ();
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int insert_mode = 0;
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/********************************************
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** LOCAL STATIC FORWARD DECLS **
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********************************************/
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static void _updateCommandInfo (int);
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static unsigned int _tuiHandleResizeDuringIO (unsigned int);
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/*********************************************************************************
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** PUBLIC FUNCTIONS **
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*********************************************************************************/
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/*
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** tuiPuts_unfiltered().
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** Function to put a string to the command window
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** When running in TUI mode, this is the "hook"
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** for fputs_unfiltered(). That is, all debugger
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** output eventually makes it's way to the bottom-level
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** routine fputs_unfiltered (main.c), which (in TUI
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** mode), calls tuiPuts_unfiltered().
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*/
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void
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#ifdef __STDC__
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tuiPuts_unfiltered (
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const char *string,
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struct ui_file * stream)
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#else
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tuiPuts_unfiltered (string, stream)
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char *string;
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struct ui_file *stream;
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#endif
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{
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int len = strlen (string);
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int i, linech;
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for (i = 0; i < len; i++)
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{
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if (string[i] == '\n' || string[i] == '\r')
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m_tuiStartNewLine;
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else
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{
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if ((cmdWin->detail.commandInfo.curch + 1) > cmdWin->generic.width)
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m_tuiStartNewLine;
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if (insert_mode)
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{
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mvwinsch (cmdWin->generic.handle,
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cmdWin->detail.commandInfo.curLine,
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cmdWin->detail.commandInfo.curch++,
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string[i]);
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wmove (cmdWin->generic.handle,
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cmdWin->detail.commandInfo.curLine,
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cmdWin->detail.commandInfo.curch);
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}
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else
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mvwaddch (cmdWin->generic.handle,
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cmdWin->detail.commandInfo.curLine,
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cmdWin->detail.commandInfo.curch++,
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string[i]);
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}
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}
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tuiRefreshWin (&cmdWin->generic);
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return;
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} /* tuiPuts_unfiltered */
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/* A cover routine for tputs().
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* tputs() is called from the readline package to put
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* out strings representing cursor positioning.
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* In TUI mode (non-XDB-style), tui_tputs() is called instead.
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*
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* The reason we need to hook tputs() is:
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* Since the output is going to curses and not to
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* a raw terminal, we need to intercept these special
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* sequences, and handle them them here.
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*
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* This function seems to be correctly handling all sequences
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* aimed at hpterm's, but there is additional work to do
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* for xterm's and dtterm's. I abandoned further work on this
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* in favor of "XDB style". In "XDB style", the command region
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* looks like terminal, not a curses window, and this routine
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* is not called. - RT
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*/
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void
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tui_tputs (str, affcnt, putfunc)
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char *str;
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int affcnt;
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int (*putfunc) (int);
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{
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extern char *rl_prompt; /* the prompt string */
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/* This set of globals are defined and initialized
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* by the readline package.
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*
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* Note we're assuming tui_tputs() is being called
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* by the readline package. That's because we're recognizing
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* that a given string is being passed by
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* matching the string address against readline's
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* term_<whatever> global. To make this more general,
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* we'd have to actually recognize the termcap sequence
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* inside the string (more work than I want to do). - RT
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*
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* We don't see or need to handle every one of these here;
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* this is just the full list defined in readline/readline.c
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*/
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extern char *term_backspace;
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extern char *term_clreol;
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extern char *term_clrpag;
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extern char *term_cr;
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extern char *term_dc;
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extern char *term_ei;
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extern char *term_goto;
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extern char *term_ic;
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extern char *term_im;
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extern char *term_mm;
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extern char *term_mo;
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extern char *term_up;
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extern char *term_scroll_region;
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extern char *term_memory_lock;
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extern char *term_memory_unlock;
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extern char *term_cursor_move;
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extern char *visible_bell;
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/* Sanity check - if not TUI, just call tputs() */
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if (!tui_version)
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tputs (str, affcnt, putfunc);
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/* The strings we special-case are handled first */
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if (str == term_backspace)
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{
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/* Backspace. */
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/* We see this on an emacs control-B.
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* I.e., it's like the left-arrow key (not like the backspace key).
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* The effect that readline wants when it transmits this
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* character to us is simply to back up one character
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* (but not to write a space over the old character).
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*/
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_updateCommandInfo (-1);
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wmove (cmdWin->generic.handle,
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cmdWin->detail.commandInfo.curLine,
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cmdWin->detail.commandInfo.curch);
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wrefresh (cmdWin->generic.handle);
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}
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else if (str == term_clreol)
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{
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/* Clear to end of line. */
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wclrtoeol (cmdWin->generic.handle);
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wrefresh (cmdWin->generic.handle);
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}
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else if (str == term_cr)
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{
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/* Carriage return */
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_updateCommandInfo (-cmdWin->detail.commandInfo.curch);
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wmove (cmdWin->generic.handle,
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cmdWin->detail.commandInfo.curLine,
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0 /* readline will rewrite the prompt from 0 */ );
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wrefresh (cmdWin->generic.handle);
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}
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else if (str == term_goto)
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{
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/* This is actually a tgoto() specifying a character position,
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* followed by either a term_IC/term_DC which [I think] means
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* insert/delete one character at that position.
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* There are complications with this one - need to either
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* extract the position from the string, or have a backdoor
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* means of communicating it from ../readline/display.c.
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* So this one is not yet implemented.
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* Not doing it seems to have no ill effects on command-line-editing
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* that I've noticed so far. - RT
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*/
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}
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else if (str == term_dc)
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{
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/* Delete character at current cursor position */
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wdelch (cmdWin->generic.handle);
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wrefresh (cmdWin->generic.handle);
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}
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else if (str == term_im)
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{
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/* Turn on insert mode. */
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insert_mode = 1;
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}
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else if (str == term_ei)
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{
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/* Turn off insert mode. */
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insert_mode = 0;
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/* Strings we know about but don't handle
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* specially here are just passed along to tputs().
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*
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* These are not handled because (as far as I can tell)
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* they are not actually emitted by the readline package
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* in the course of doing command-line editing. Some of them
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* theoretically could be used in the future, in which case we'd
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* need to handle them.
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*/
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}
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else if (str == term_ic || /* insert character */
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str == term_cursor_move || /* cursor move */
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str == term_clrpag || /* clear page */
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str == term_mm || /* turn on meta key */
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str == term_mo || /* turn off meta key */
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str == term_up || /* up one line (not expected) */
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str == term_scroll_region || /* set scroll region */
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str == term_memory_lock || /* lock screen above cursor */
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str == term_memory_unlock || /* unlock screen above cursor */
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str == visible_bell)
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{ /* flash screen */
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tputs (str, affcnt, putfunc);
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}
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else
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{ /* something else */
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tputs (str, affcnt, putfunc);
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}
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} /* tui_tputs */
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/*
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** tui_vwgetch()
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** Wrapper around wgetch with the window in a va_list
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*/
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unsigned int
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#ifdef __STDC__
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tui_vwgetch (va_list args)
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#else
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tui_vwgetch (args)
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va_list args;
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#endif
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{
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unsigned int ch;
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WINDOW *window;
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window = va_arg (args, WINDOW *);
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return ((unsigned int) wgetch (window));
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} /* tui_vwgetch */
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/*
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** tui_vread()
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** Wrapper around read() with paramets in a va_list
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*/
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unsigned int
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#ifdef __STDC__
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tui_vread (va_list args)
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#else
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tui_vread (args)
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va_list args;
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#endif
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{
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int result = 0;
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int filedes = va_arg (args, int);
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char *buf = va_arg (args, char *);
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int nbytes = va_arg (args, int);
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result = read (filedes, buf, nbytes);
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return result;
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} /* tui_vread() */
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/*
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** tuiRead()
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** Function to perform a read() catching resize events
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*/
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int
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#ifdef __STDC__
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tuiRead (
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int filedes,
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char *buf,
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int nbytes)
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#else
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tuiRead (filedes, buf, nbytes)
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int filedes;
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char *buf;
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int nbytes;
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#endif
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{
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int result = 0;
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result = (int) vcatch_errors ((OpaqueFuncPtr) tui_vread, filedes, buf, nbytes);
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*buf = _tuiHandleResizeDuringIO (*buf);
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return result;
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} /* tuiRead */
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/*
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** tuiGetc().
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** Get a character from the command window.
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** This is called from the readline package,
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** that is, we have:
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** tuiGetc() [here], called from
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** readline code [in ../readline/], called from
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** command_line_input() in top.c
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*/
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unsigned int
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#ifdef __STDC__
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tuiGetc (void)
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#else
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tuiGetc ()
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#endif
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{
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unsigned int ch;
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extern char *rl_prompt;
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extern char *rl_line_buffer;
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extern int rl_point;
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/* Call the curses routine that reads one character */
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#ifndef COMMENT
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ch = (unsigned int) vcatch_errors ((OpaqueFuncPtr) tui_vwgetch,
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cmdWin->generic.handle);
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#else
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ch = wgetch (cmdWin->generic.handle);
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#endif
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ch = _tuiHandleResizeDuringIO (ch);
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if (m_isCommandChar (ch))
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{ /* Handle prev/next/up/down here */
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tuiTermSetup (0);
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ch = tuiDispatchCtrlChar (ch);
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cmdWin->detail.commandInfo.curch = strlen (rl_prompt) + rl_point;
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tuiTermUnsetup (0, cmdWin->detail.commandInfo.curch);
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}
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if (ch == '\n' || ch == '\r' || ch == '\f')
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cmdWin->detail.commandInfo.curch = 0;
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else
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tuiIncrCommandCharCountBy (1);
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return ch;
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} /* tuiGetc */
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/*
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** tuiBufferGetc().
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*/
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/*elz: this function reads a line of input from the user and
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puts it in a static buffer. Subsequent calls to this same function
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obtain one char at the time, providing the caller with a behavior
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similar to fgetc. When the input is buffered, the backspaces have
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the needed effect, i.e. ignore the last char active in the buffer */
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/* so far this function is called only from the query function in
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utils.c */
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unsigned int
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#ifdef __STDC__
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tuiBufferGetc (void)
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#else
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tuiBufferGetc ()
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#endif
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{
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unsigned int ch;
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static unsigned char _ibuffer[512];
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static int index_read = -1;
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static int length_of_answer = -1;
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int pos = 0;
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if (length_of_answer == -1)
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{
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/* this is the first time through, need to read the answer */
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do
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{
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/* Call the curses routine that reads one character */
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ch = (unsigned int) wgetch (cmdWin->generic.handle);
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if (ch != '\b')
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{
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_ibuffer[pos] = ch;
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pos++;
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}
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else
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pos--;
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}
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while (ch != '\r' && ch != '\n');
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length_of_answer = pos;
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index_read = 0;
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}
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ch = _ibuffer[index_read];
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index_read++;
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if (index_read == length_of_answer)
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{
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/*this is the last time through, reset for next query */
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index_read = -1;
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length_of_answer = -1;
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}
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wrefresh (cmdWin->generic.handle);
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return (ch);
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} /* tuiBufferGetc */
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/*
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** tuiStartNewLines().
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*/
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void
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#ifdef __STDC__
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tuiStartNewLines (
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int numLines)
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#else
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tuiStartNewLines (numLines)
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int numLines;
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#endif
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{
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if (numLines > 0)
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{
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if (cmdWin->generic.viewportHeight > 1 &&
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cmdWin->detail.commandInfo.curLine < cmdWin->generic.viewportHeight)
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cmdWin->detail.commandInfo.curLine += numLines;
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else
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scroll (cmdWin->generic.handle);
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cmdWin->detail.commandInfo.curch = 0;
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wmove (cmdWin->generic.handle,
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cmdWin->detail.commandInfo.curLine,
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cmdWin->detail.commandInfo.curch);
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tuiRefreshWin (&cmdWin->generic);
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}
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return;
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} /* tuiStartNewLines */
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/*
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** tui_vStartNewLines().
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** With numLines in a va_list
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*/
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void
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#ifdef __STDC__
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tui_vStartNewLines (
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va_list args)
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#else
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tui_vStartNewLines (args)
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va_list args;
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#endif
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{
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int numLines = va_arg (args, int);
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tuiStartNewLines (numLines);
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return;
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} /* tui_vStartNewLines */
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/****************************************************************************
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** LOCAL STATIC FUNCTIONS **
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*****************************************************************************/
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/*
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** _tuiHandleResizeDuringIO
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** This function manages the cleanup when a resize has occured
|
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** From within a call to getch() or read. Returns the character
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** to return from getc or read.
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*/
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static unsigned int
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#ifdef __STDC__
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_tuiHandleResizeDuringIO (
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unsigned int originalCh) /* the char just read */
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#else
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_tuiHandleResizeDuringIO (originalCh)
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unsigned int originalCh;
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#endif
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{
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if (tuiWinResized ())
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{
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tuiDo ((TuiOpaqueFuncPtr) tuiRefreshAll);
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dont_repeat ();
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tuiSetWinResizedTo (FALSE);
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rl_reset ();
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return '\n';
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}
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else
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return originalCh;
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} /* _tuiHandleResizeDuringIO */
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|
|
|
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/*
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** _updateCommandInfo().
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|
** Function to update the command window information.
|
|
*/
|
|
static void
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#ifdef __STDC__
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_updateCommandInfo (
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int sizeOfString)
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#else
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_updateCommandInfo (sizeOfString)
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int sizeOfString;
|
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#endif
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{
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if ((sizeOfString +
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cmdWin->detail.commandInfo.curch) > cmdWin->generic.width)
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{
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int newCurch = sizeOfString + cmdWin->detail.commandInfo.curch;
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tuiStartNewLines (1);
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cmdWin->detail.commandInfo.curch = newCurch - cmdWin->generic.width;
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}
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else
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cmdWin->detail.commandInfo.curch += sizeOfString;
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return;
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} /* _updateCommandInfo */
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|
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/* Looked at in main.c, fputs_unfiltered(), to decide
|
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* if it's safe to do standard output to the command window.
|
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*/
|
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int tui_owns_terminal = 0;
|
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|
|
/* Called to set up the terminal for TUI (curses) I/O.
|
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* We do this either on our way "in" to GDB after target
|
|
* program execution, or else within tuiDo just before
|
|
* going off to TUI routines.
|
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*/
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|
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void
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#ifdef __STDC__
|
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tuiTermSetup (
|
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int turn_off_echo)
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#else
|
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tuiTermSetup (turn_off_echo)
|
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int turn_off_echo;
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#endif
|
|
{
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char *buffer;
|
|
int start;
|
|
int end;
|
|
int endcol;
|
|
extern char *term_scroll_region;
|
|
extern char *term_cursor_move;
|
|
extern char *term_memory_lock;
|
|
extern char *term_memory_unlock;
|
|
|
|
/* Turn off echoing, since the TUI does not
|
|
* expect echoing. Below I only put in the TERMIOS
|
|
* case, since that is what applies on HP-UX. turn_off_echo
|
|
* is 1 except for the case where we're being called
|
|
* on a "quit", in which case we want to leave echo on.
|
|
*/
|
|
if (turn_off_echo)
|
|
{
|
|
#ifdef HAVE_TERMIOS
|
|
struct termios tio;
|
|
tcgetattr (0, &tio);
|
|
tio.c_lflag &= ~(ECHO);
|
|
tcsetattr (0, TCSANOW, &tio);
|
|
#endif
|
|
}
|
|
|
|
/* Compute the start and end lines of the command
|
|
* region. (Actually we only use end here)
|
|
*/
|
|
start = winList[CMD_WIN]->generic.origin.y;
|
|
end = start + winList[CMD_WIN]->generic.height - 1;
|
|
endcol = winList[CMD_WIN]->generic.width - 1;
|
|
|
|
if (term_memory_unlock)
|
|
{
|
|
|
|
/* Un-do the effect of the memory lock in terminal_inferior() */
|
|
tputs (term_memory_unlock, 1, (int (*)PARAMS ((int))) putchar);
|
|
fflush (stdout);
|
|
|
|
}
|
|
else if (term_scroll_region)
|
|
{
|
|
|
|
/* Un-do the effect of setting scroll region in terminal_inferior() */
|
|
/* I'm actually not sure how to do this (we don't know for
|
|
* sure what the scroll region was *before* we changed it),
|
|
* but I'll guess that setting it to the whole screen is
|
|
* the right thing. So, ...
|
|
*/
|
|
|
|
/* Set scroll region to be 0..end */
|
|
buffer = (char *) tgoto (term_scroll_region, end, 0);
|
|
tputs (buffer, 1, (int (*)PARAMS ((int))) putchar);
|
|
|
|
} /* else we're out of luck */
|
|
|
|
/* This is an attempt to keep the logical & physical
|
|
* cursor in synch, going into curses. Without this,
|
|
* curses seems to be confused by the fact that
|
|
* GDB has physically moved the curser on it. One
|
|
* visible effect of removing this code is that the
|
|
* locator window fails to get updated and the line
|
|
* of text that *should* go into the locator window
|
|
* often goes to the wrong place.
|
|
*/
|
|
/* What's done here is to tell curses to write a ' '
|
|
* at the bottom right corner of the screen.
|
|
* The idea is to wind up with the cursor in a known
|
|
* place.
|
|
* Note I'm relying on refresh()
|
|
* only writing what changed (the space),
|
|
* not the whole screen.
|
|
*/
|
|
standend ();
|
|
move (end, endcol - 1);
|
|
addch (' ');
|
|
refresh ();
|
|
|
|
tui_owns_terminal = 1;
|
|
} /* tuiTermSetup */
|
|
|
|
|
|
/* Called to set up the terminal for target program I/O, meaning I/O
|
|
* is confined to the command-window area. We also call this on our
|
|
* way out of tuiDo, thus setting up the terminal this way for
|
|
* debugger command I/O. */
|
|
void
|
|
#ifdef __STDC__
|
|
tuiTermUnsetup (
|
|
int turn_on_echo,
|
|
int to_column)
|
|
#else
|
|
tuiTermUnsetup (turn_on_echo, to_column)
|
|
int turn_on_echo;
|
|
int to_column;
|
|
#endif
|
|
{
|
|
int start;
|
|
int end;
|
|
int curline;
|
|
char *buffer;
|
|
/* The next bunch of things are from readline */
|
|
extern char *term_scroll_region;
|
|
extern char *term_cursor_move;
|
|
extern char *term_memory_lock;
|
|
extern char *term_memory_unlock;
|
|
extern char *term_se;
|
|
|
|
/* We need to turn on echoing, since the TUI turns it off */
|
|
/* Below I only put in the TERMIOS case, since that
|
|
* is what applies on HP-UX.
|
|
*/
|
|
if (turn_on_echo)
|
|
{
|
|
#ifdef HAVE_TERMIOS
|
|
struct termios tio;
|
|
tcgetattr (0, &tio);
|
|
tio.c_lflag |= (ECHO);
|
|
tcsetattr (0, TCSANOW, &tio);
|
|
#endif
|
|
}
|
|
|
|
/* Compute the start and end lines of the command
|
|
* region, as well as the last "real" line of
|
|
* the region (normally same as end, except when
|
|
* we're first populating the region)
|
|
*/
|
|
start = winList[CMD_WIN]->generic.origin.y;
|
|
end = start + winList[CMD_WIN]->generic.height - 1;
|
|
curline = start + winList[CMD_WIN]->detail.commandInfo.curLine;
|
|
|
|
/* We want to confine target I/O to the command region.
|
|
* In order to do so, we must either have "memory lock"
|
|
* (hpterm's) or "scroll regions" (xterm's).
|
|
*/
|
|
if (term_cursor_move && term_memory_lock)
|
|
{
|
|
|
|
/* Memory lock means lock region above cursor.
|
|
* So first position the cursor, then call memory lock.
|
|
*/
|
|
buffer = tgoto (term_cursor_move, 0, start);
|
|
tputs (buffer, 1, (int (*)PARAMS ((int))) putchar);
|
|
tputs (term_memory_lock, 1, (int (*)PARAMS ((int))) putchar);
|
|
|
|
}
|
|
else if (term_scroll_region)
|
|
{
|
|
|
|
/* Set the scroll region to the command window */
|
|
buffer = tgoto (term_scroll_region, end, start);
|
|
tputs (buffer, 1, (int (*)PARAMS ((int))) putchar);
|
|
|
|
} /* else we can't do anything about target I/O */
|
|
|
|
/* Also turn off standout mode, in case it is on */
|
|
if (term_se != NULL)
|
|
tputs (term_se, 1, (int (*)PARAMS ((int))) putchar);
|
|
|
|
/* Now go to the appropriate spot on the end line */
|
|
buffer = tgoto (term_cursor_move, to_column, end);
|
|
tputs (buffer, 1, (int (*)PARAMS ((int))) putchar);
|
|
fflush (stdout);
|
|
|
|
tui_owns_terminal = 0;
|
|
} /* tuiTermUnsetup */
|