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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 "config.h"
#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 <algorithm>
#include "fallback.h"
#include "util.h"
#include "wutil.h"
#include "kill.h"
#include "proc.h"
#include "sanity.h"
#include "common.h"
#include "env.h"
#include "exec.h"
#include "path.h"
/**
Maximum entries in killring
*/
#define KILL_MAX 8192
/** Last kill string */
//static ll_node_t *kill_last=0;
/** Current kill string */
//static ll_node_t *kill_current=0;
/** Kill ring */
typedef std::list<wcstring> kill_list_t;
static kill_list_t kill_list;
/**
Contents of the X clipboard, at last time we checked it
*/
static wcstring cut_buffer;
/**
Test if the xsel command is installed. Since this is called often,
cache the result.
*/
static int has_xsel()
{
static signed char res=-1;
if (res < 0)
{
res = !! path_get_path(L"xsel", NULL);
}
return res;
}
void kill_add(const wcstring &str)
{
ASSERT_IS_MAIN_THREAD();
if (str.empty())
return;
wcstring cmd;
wcstring escaped_str;
kill_list.push_front(str);
/*
Check to see if user has set the FISH_CLIPBOARD_CMD variable,
and, if so, use it instead of checking the display, etc.
I couldn't think of a safe way to allow overide of the echo
command too, so, the command used must accept the input via stdin.
*/
const env_var_t clipboard_wstr = env_get_string(L"FISH_CLIPBOARD_CMD");
if (!clipboard_wstr.missing())
{
escaped_str = escape(str.c_str(), ESCAPE_ALL);
cmd.assign(L"echo -n ");
cmd.append(escaped_str);
cmd.append(clipboard_wstr);
}
else
{
/* This is for sending the kill to the X copy-and-paste buffer */
if (!has_xsel())
{
return;
}
const env_var_t disp_wstr = env_get_string(L"DISPLAY");
if (!disp_wstr.missing())
{
escaped_str = escape(str.c_str(), ESCAPE_ALL);
cmd.assign(L"echo -n ");
cmd.append(escaped_str);
cmd.append(L" | xsel -i -b");
}
}
if (! cmd.empty())
{
if (exec_subshell(cmd, false /* do not apply exit status */) == -1)
{
/*
Do nothing on failiure
*/
}
cut_buffer = escaped_str;
}
}
/**
Remove first match for specified string from circular list
*/
static void kill_remove(const wcstring &s)
{
ASSERT_IS_MAIN_THREAD();
kill_list_t::iterator iter = std::find(kill_list.begin(), kill_list.end(), s);
if (iter != kill_list.end())
kill_list.erase(iter);
}
void kill_replace(const wcstring &old, const wcstring &newv)
{
kill_remove(old);
kill_add(newv);
}
const wchar_t *kill_yank_rotate()
{
ASSERT_IS_MAIN_THREAD();
// Move the first element to the end
if (kill_list.empty())
{
return NULL;
}
else
{
kill_list.splice(kill_list.end(), kill_list, kill_list.begin());
return kill_list.front().c_str();
}
}
/**
Check the X clipboard. If it has been changed, add the new
clipboard contents to the fish killring.
*/
static void kill_check_x_buffer()
{
if (!has_xsel())
return;
const env_var_t disp = env_get_string(L"DISPLAY");
if (! disp.missing())
{
size_t i;
wcstring cmd = L"xsel -t 500 -b";
wcstring new_cut_buffer=L"";
wcstring_list_t list;
if (exec_subshell(cmd, list, false /* do not apply exit status */) != -1)
{
for (i=0; i<list.size(); i++)
{
wcstring next_line = escape_string(list.at(i), 0);
if (i > 0) new_cut_buffer += L"\\n";
new_cut_buffer += next_line;
}
if (new_cut_buffer.size() > 0)
{
/*
The buffer is inserted with backslash escapes,
since we don't really like tabs, newlines,
etc. anyway.
*/
if (cut_buffer != new_cut_buffer)
{
cut_buffer = new_cut_buffer;
kill_list.push_front(new_cut_buffer);
}
}
}
}
}
const wchar_t *kill_yank()
{
kill_check_x_buffer();
if (kill_list.empty())
{
return L"";
}
else
{
return kill_list.front().c_str();
}
}
void kill_sanity_check()
{
}
void kill_init()
{
}
void kill_destroy()
{
cut_buffer.clear();
}
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