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/** \file kill.c
The killring.
Works like the killring in emacs and readline. The killring is cut
and paste with a memory of previous cuts. It supports integration
with the X clipboard.
*/
#include <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#include <termios.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include "config.h"
#include "util.h"
#include "wutil.h"
#include "kill.h"
#include "proc.h"
#include "sanity.h"
#include "common.h"
#include "env.h"
#include "expand.h"
#include "exec.h"
#include "parser.h"
/**
Maximum entries in killring
*/
#define KILL_MAX 8192
static ll_node_t /** Last kill string */*kill_last=0, /** Current kill string */*kill_current =0;
/**
Contents of the X clipboard, at last time we checked it
*/
static wchar_t *cut_buffer=0;
/**
Test if the xsel command is installed
*/
static int has_xsel()
{
wchar_t *path = get_filename( L"xsel" );
if( path)
{
free(path);
return 1;
}
else
return 0;
}
/**
Add the string to the internal killring
*/
static void kill_add_internal( wchar_t *str )
{
if( wcslen( str ) == 0 )
return;
if( kill_last == 0 )
{
kill_current = kill_last=malloc( sizeof( ll_node_t ) );
kill_current->data = wcsdup(str);
kill_current->prev = kill_current;
}
else
{
kill_current = malloc( sizeof( ll_node_t ) );
kill_current->data = kill_last->data;
kill_last->data = wcsdup(str);
kill_current->prev = kill_last->prev;
kill_last->prev = kill_current;
kill_current = kill_last;
}
}
void kill_add( wchar_t *str )
{
kill_add_internal(str);
if( !has_xsel() )
return;
/* This is for sending the kill to the X copy-and-paste buffer */
wchar_t *disp;
if( (disp = env_get( L"DISPLAY" )) )
{
wchar_t *escaped_str = expand_escape( str, 1 );
wchar_t *cmd = wcsdupcat2(L"echo ", escaped_str, L"|xsel -b",0);
exec_subshell( cmd, 0 );
free( cut_buffer );
free( cmd );
cut_buffer = escaped_str;
}
}
wchar_t *kill_yank_rotate()
{
if( kill_current == 0 )
return L"";
kill_current = kill_current->prev;
return (wchar_t *)kill_current->data;
}
/**
Check the X clipboard. If it has been changed, add the new
clipboard contents to the fish killring.
*/
static void kill_check_x_buffer()
{
wchar_t *disp;
if( !has_xsel() )
return;
if( (disp = env_get( L"DISPLAY" )) )
{
int i;
wchar_t *cmd = L"xsel -t 500 -b";
wchar_t *new_cut_buffer=0;
array_list_t list;
al_init( &list );
exec_subshell( cmd, &list );
for( i=0; i<al_get_count( &list ); i++ )
{
wchar_t *next_line = expand_escape( (wchar_t *)al_get( &list, i ), 0);
if( i==0 )
{
new_cut_buffer = next_line;
}
else
{
wchar_t *old = new_cut_buffer;
new_cut_buffer= wcsdupcat2( new_cut_buffer, L"\\n", next_line, 0 );
free( old );
free( next_line );
}
}
if( new_cut_buffer )
{
/*
The buffer is inserted with backslash escapes,
since we don't really like tabs, newlines,
etc. anyway.
*/
if( cut_buffer != 0 )
{
if( wcscmp( new_cut_buffer, cut_buffer ) == 0 )
{
free( new_cut_buffer );
new_cut_buffer = 0;
}
else
{
free( cut_buffer );
cut_buffer = 0;
}
}
if( cut_buffer == 0 )
{
cut_buffer = new_cut_buffer;
kill_add_internal( cut_buffer );
}
}
al_foreach( &list, (void (*)(const void *))&free );
al_destroy( &list );
}
}
wchar_t *kill_yank()
{
kill_check_x_buffer();
if( kill_current == 0 )
return L"";
kill_current=kill_last;
return (wchar_t *)kill_current->data;
}
void kill_sanity_check()
{
int i;
if( is_interactive )
{
/* Test that the kill-ring is consistent */
if( kill_current != 0 )
{
int kill_ok = 0;
ll_node_t *tmp = kill_current->prev;
for( i=0; i<KILL_MAX; i++ )
{
if( tmp == 0 )
break;
if( tmp->data == 0 )
break;
if( tmp == kill_current )
{
kill_ok = 1;
break;
}
tmp = tmp->prev;
}
if( !kill_ok )
{
debug( 0,
L"Killring inconsistent" );
sanity_lose();
}
}
}
}
void kill_init()
{
}
void kill_destroy()
{
if( cut_buffer )
free( cut_buffer );
if( kill_current != 0 )
{
kill_current = kill_last->prev;
kill_last->prev = 0;
while( kill_current )
{
ll_node_t *tmp = kill_current;
kill_current = kill_current->prev;
free( tmp->data );
free( tmp );
}
}
}
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