while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) {
        char *p;

        p = strchr(buf,'\r');
        if (!p) p = strchr(buf,'\n');
        if (p) *p = '\0';
        linenoiseHistoryAdd(buf);
    }

/* linenoise.c -- guerrilla line editing library against the idea that a
 * line editing lib needs to be 20,000 lines of C code.
 *
 * You can find the latest source code at:
 *
 *   http://example.com
 *
 * Does a number of crazy assumptions that happen to be true in 99.9999% of
 * the 2010 UNIX computers around.
 *
 * ------------------------------------------------------------------------
 *
 *
 * All rights reserved.
 *
 *
 * ------------------------------------------------------------------------
 *
 * References:
 * - http://example.com
 * - http://example.com
 *
 * Todo list:
 * - Filter bogus Ctrl+<char> combinations.
 * - Win32 support
 *
 * Bloat:
 * - History search like Ctrl+r in readline?
 *
 * List of escape sequences used by this program, we do everything just
 * with three sequences. In order to be so cheap we may have some
 * flickering effect with some slow terminal, but the lesser sequences
 * the more compatible.
 *
 * EL (Erase Line)
 *    Sequence: ESC [ n K
 *    Effect: if n is 0 or missing, clear from cursor to end of line
 *    Effect: if n is 1, clear from beginning of line to cursor
 *    Effect: if n is 2, clear entire line
 *
 * CUF (CUrsor Forward)
 *    Sequence: ESC [ n C
 *    Effect: moves cursor forward n chars
 *
 * CUB (CUrsor Backward)
 *    Sequence: ESC [ n D
 *    Effect: moves cursor backward n chars
 *
 * The following is used to get the terminal width if getting
 * the width with the TIOCGWINSZ ioctl fails
 *
 * DSR (Device Status Report)
 *    Sequence: ESC [ 6 n
 *    Effect: reports the current cusor position as ESC [ n ; m R
 *            where n is the row and m is the column
 *
 * When multi line mode is enabled, we also use an additional escape
 * sequence. However multi line editing is disabled by default.
 *
 * CUU (Cursor Up)
 *    Sequence: ESC [ n A
 *    Effect: moves cursor up of n chars.
 *
 * CUD (Cursor Down)
 *    Sequence: ESC [ n B
 *    Effect: moves cursor down of n chars.
 *
 * When linenoiseClearScreen() is called, two additional escape sequences
 * are used in order to clear the screen and position the cursor at home
 * position.
 *
 * CUP (Cursor position)
 *    Sequence: ESC [ H
 *    Effect: moves the cursor to upper left corner
 *
 * ED (Erase display)
 *    Sequence: ESC [ 2 J
 *    Effect: clear the whole screen
 *
 */

#include <termios.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "linenoise.h"

#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
#define LINENOISE_MAX_LINE 4096
static char *unsupported_term[] = {(char*)"dumb",(char*)"cons25",(char*)"emacs",NULL};
static linenoiseCompletionCallback *completionCallback = NULL;
static linenoiseHintsCallback *hintsCallback = NULL;
static linenoiseFreeHintsCallback *freeHintsCallback = NULL;

static struct termios orig_termios; /* In order to restore at exit.*/
static int rawmode = 0; /* For atexit() function to check if restore is needed*/
static int mlmode = 0;  /* Multi line mode. Default is single line. */
static int atexit_registered = 0; /* Register atexit just 1 time. */
static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
static int history_len = 0;
static char **history = NULL;

/* The linenoiseState structure represents the state during line editing.
 * We pass this state to functions implementing specific editing
 * functionalities. */
struct linenoiseState {
    int ifd;            /* Terminal stdin file descriptor. */
    int ofd;            /* Terminal stdout file descriptor. */
    char *buf;          /* Edited line buffer. */
    size_t buflen;      /* Edited line buffer size. */
    const char *prompt; /* Prompt to display. */
    size_t plen;        /* Prompt length. */
    size_t pos;         /* Current cursor position. */
    size_t oldpos;      /* Previous refresh cursor position. */
    size_t len;         /* Current edited line length. */
    size_t cols;        /* Number of columns in terminal. */
    size_t maxrows;     /* Maximum num of rows used so far (multiline mode) */
    int history_index;  /* The history index we are currently editing. */
};

enum KEY_ACTION{
	KEY_NULL = 0,	    /* NULL */
	CTRL_A = 1,         /* Ctrl+a */
	CTRL_B = 2,         /* Ctrl-b */
	CTRL_C = 3,         /* Ctrl-c */
	CTRL_D = 4,         /* Ctrl-d */
	CTRL_E = 5,         /* Ctrl-e */
	CTRL_F = 6,         /* Ctrl-f */
	CTRL_H = 8,         /* Ctrl-h */
	TAB = 9,            /* Tab */
	CTRL_K = 11,        /* Ctrl+k */
	CTRL_L = 12,        /* Ctrl+l */
	ENTER = 13,         /* Enter */
	CTRL_N = 14,        /* Ctrl-n */
	CTRL_P = 16,        /* Ctrl-p */
	CTRL_T = 20,        /* Ctrl-t */
	CTRL_U = 21,        /* Ctrl+u */
	CTRL_W = 23,        /* Ctrl+w */
	CTRL_Z = 26,        /* Ctrl+z */
	ESC = 27,           /* Escape */
	BACKSPACE =  127    /* Backspace */
};

static void linenoiseAtExit(void);
int linenoiseHistoryAdd(const char *line);
static void refreshLine(struct linenoiseState *l);

/* Debugging macro. */
#if 0
FILE *lndebug_fp = NULL;
#define lndebug(...) \
    do { \
        if (lndebug_fp == NULL) { \
            lndebug_fp = fopen("/tmp/lndebug.txt","a"); \
            fprintf(lndebug_fp, \
            "[%d %d %d] p: %d, rows: %d, rpos: %d, max: %d, oldmax: %d\n", \
            (int)l->len,(int)l->pos,(int)l->oldpos,plen,rows,rpos, \
            (int)l->maxrows,old_rows); \
        } \
        fprintf(lndebug_fp, ", " __VA_ARGS__); \
        fflush(lndebug_fp); \
    } while (0)
#else
#define lndebug(fmt, ...)
#endif

/* ======================= Low level terminal handling ====================== */

/* Set if to use or not the multi line mode. */
void linenoiseSetMultiLine(int ml) {
    mlmode = ml;
}

/* Return true if the terminal name is in the list of terminals we know are
 * not able to understand basic escape sequences. */
static int isUnsupportedTerm(void) {
    char *term = getenv("TERM");
    int j;

    if (term == NULL) return 0;
    for (j = 0; unsupported_term[j]; j++)
        if (!strcasecmp(term,unsupported_term[j])) return 1;
    return 0;
}

/* Raw mode: 1960 magic shit. */
static int enableRawMode(int fd) {
    struct termios raw;

    if (!isatty(STDIN_FILENO)) goto fatal;
    if (!atexit_registered) {
        atexit(linenoiseAtExit);
        atexit_registered = 1;
    }
    if (tcgetattr(fd,&orig_termios) == -1) goto fatal;

    raw = orig_termios;  /* modify the original mode */
    /* input modes: no break, no CR to NL, no parity check, no strip char,
     * no start/stop output control. */
    raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
    /* output modes - disable post processing */
    raw.c_oflag &= ~(OPOST);
    /* control modes - set 8 bit chars */
    raw.c_cflag |= (CS8);
    /* local modes - choing off, canonical off, no extended functions,
     * no signal chars (^Z,^C) */
    raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
    /* control chars - set return condition: min number of bytes and timer.
     * We want read to return every single byte, without timeout. */
    raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */

    /* put terminal in raw mode after flushing */
    if (tcsetattr(fd,TCSAFLUSH,&raw) < 0) goto fatal;
    rawmode = 1;
    return 0;

fatal:
    errno = ENOTTY;
    return -1;
}

static void disableRawMode(int fd) {
    /* Don't even check the return value as it's too late. */
    if (rawmode && tcsetattr(fd,TCSAFLUSH,&orig_termios) != -1)
        rawmode = 0;
}

/* Use the ESC [6n escape sequence to query the horizontal cursor position
 * and return it. On error -1 is returned, on success the position of the
 * cursor. */
static int getCursorPosition(int ifd, int ofd) {
    char buf[32];
    int cols, rows;
    unsigned int i = 0;

    /* Report cursor location */
    if (write(ofd, "\x1b[6n", 4) != 4) return -1;

    /* Read the response: ESC [ rows ; cols R */
    while (i < sizeof(buf)-1) {
        if (read(ifd,buf+i,1) != 1) break;
        if (buf[i] == 'R') break;
        i++;
    }
    buf[i] = '\0';

    /* Parse it. */
    if (buf[0] != ESC || buf[1] != '[') return -1;
    if (sscanf(buf+2,"%d;%d",&rows,&cols) != 2) return -1;
    return cols;
}

/* Try to get the number of columns in the current terminal, or assume 80
 * if it fails. */
static int getColumns(int ifd, int ofd) {
    struct winsize ws;

    if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
        /* ioctl() failed. Try to query the terminal itself. */
        int start, cols;

        /* Get the initial position so we can restore it later. */
        start = getCursorPosition(ifd,ofd);
        if (start == -1) goto failed;

        /* Go to right margin and get position. */
        if (write(ofd,"\x1b[999C",6) != 6) goto failed;
        cols = getCursorPosition(ifd,ofd);
        if (cols == -1) goto failed;

        /* Restore position. */
        if (cols > start) {
            char seq[32];
            snprintf(seq,32,"\x1b[%dD",cols-start);
            if (write(ofd,seq,strlen(seq)) == -1) {
                /* Can't recover... */
            }
        }
        return cols;
    } else {
        return ws.ws_col;
    }

failed:
    return 80;
}

/* Clear the screen. Used to handle ctrl+l */
void linenoiseClearScreen(void) {
    if (write(STDOUT_FILENO,"\x1b[H\x1b[2J",7) <= 0) {
        /* nothing to do, just to avoid warning. */
    }
}

/* Beep, used for completion when there is nothing to complete or when all
 * the choices were already shown. */
static void linenoiseBeep(void) {
    fprintf(stderr, "\x7");
    fflush(stderr);
}

/* ============================== Completion ================================ */

/* Free a list of completion option populated by linenoiseAddCompletion(). */
static void freeCompletions(linenoiseCompletions *lc) {
    size_t i;
    for (i = 0; i < lc->len; i++)
        free(lc->cvec[i]);
    if (lc->cvec != NULL)
        free(lc->cvec);
}

/* This is an helper function for linenoiseEdit() and is called when the
 * user types the <tab> key in order to complete the string currently in the
 * input.
 *
 * The state of the editing is encapsulated into the pointed linenoiseState
 * structure as described in the structure definition. */
static int completeLine(struct linenoiseState *ls) {
    linenoiseCompletions lc = { 0, NULL };
    int nread, nwritten;
    char c = 0;

    completionCallback(ls->buf,&lc);
    if (lc.len == 0) {
        linenoiseBeep();
    } else {
        size_t stop = 0, i = 0;

        while(!stop) {
            /* Show completion or original buffer */
            if (i < lc.len) {
                struct linenoiseState saved = *ls;

                ls->len = ls->pos = strlen(lc.cvec[i]);
                ls->buf = lc.cvec[i];
                refreshLine(ls);
                ls->len = saved.len;
                ls->pos = saved.pos;
                ls->buf = saved.buf;
            } else {
                refreshLine(ls);
            }

            nread = read(ls->ifd,&c,1);
            if (nread <= 0) {
                freeCompletions(&lc);
                return -1;
            }

            switch(c) {
                case 9: /* tab */
                    i = (i+1) % (lc.len+1);
                    if (i == lc.len) linenoiseBeep();
                    break;
                case 27: /* escape */
                    /* Re-show original buffer */
                    if (i < lc.len) refreshLine(ls);
                    stop = 1;
                    break;
                default:
                    /* Update buffer and return */
                    if (i < lc.len) {
                        nwritten = snprintf(ls->buf,ls->buflen,"%s",lc.cvec[i]);
                        ls->len = ls->pos = nwritten;
                    }
                    stop = 1;
                    break;
            }
        }
    }

    freeCompletions(&lc);
    return c; /* Return last read character */
}

/* Register a callback function to be called for tab-completion. */
void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) {
    completionCallback = fn;
}

/* Register a hits function to be called to show hits to the user at the
 * right of the prompt. */
void linenoiseSetHintsCallback(linenoiseHintsCallback *fn) {
    hintsCallback = fn;
}

/* Register a function to free the hints returned by the hints callback
 * registered with linenoiseSetHintsCallback(). */
void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *fn) {
    freeHintsCallback = fn;
}

/* This function is used by the callback function registered by the user
 * in order to add completion options given the input string when the
 * user typed <tab>. See the example.c source code for a very easy to
 * understand example. */
void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
    size_t len = strlen(str);
    char *copy, **cvec;

    copy = (char*) malloc(len+1);
    if (copy == NULL) return;
    memcpy(copy,str,len+1);
    cvec = (char**) realloc(lc->cvec,sizeof(char*)*(lc->len+1));
    if (cvec == NULL) {
        free(copy);
        return;
    }
    lc->cvec = cvec;
    lc->cvec[lc->len++] = copy;
}

/* =========================== Line editing ================================= */

/* We define a very simple "append buffer" structure, that is an heap
 * allocated string where we can append to. This is useful in order to
 * write all the escape sequences in a buffer and flush them to the standard
 * output in a single call, to avoid flickering effects. */
struct abuf {
    char *b;
    int len;
};

static void abInit(struct abuf *ab) {
    ab->b = NULL;
    ab->len = 0;
}

static void abAppend(struct abuf *ab, const char *s, int len) {
    char *ptr = (char*) realloc(ab->b,ab->len+len);

    if (ptr == NULL) return;
    memcpy(ptr+ab->len,s,len);
    ab->b = ptr;
    ab->len += len;
}

static void abFree(struct abuf *ab) {
    free(ab->b);
}

/* Helper of refreshSingleLine() and refreshMultiLine() to show hints
 * to the right of the prompt. */
void refreshShowHints(struct abuf *ab, struct linenoiseState *l, int plen) {
    char seq[64];
    if (hintsCallback && plen+l->len < l->cols) {
        int color = -1, bold = 0;
        char *hint = hintsCallback(l->buf,&color,&bold);
        if (hint) {
            int hintlen = strlen(hint);
            int hintmaxlen = l->cols-(plen+l->len);
            if (hintlen > hintmaxlen) hintlen = hintmaxlen;
            if (bold == 1 && color == -1) color = 37;
            if (color != -1 || bold != 0)
                snprintf(seq,64,"\033[%d;%d;49m",bold,color);
            else
                seq[0] = '\0';
            abAppend(ab,seq,strlen(seq));
            abAppend(ab,hint,hintlen);
            if (color != -1 || bold != 0)
                abAppend(ab,"\033[0m",4);
            /* Call the function to free the hint returned. */
            if (freeHintsCallback) freeHintsCallback(hint);
        }
    }
}

/* Single line low level line refresh.
 *
 * Rewrite the currently edited line accordingly to the buffer content,
 * cursor position, and number of columns of the terminal. */
static void refreshSingleLine(struct linenoiseState *l) {
    char seq[64];
    size_t plen = strlen(l->prompt);
    int fd = l->ofd;
    char *buf = l->buf;
    size_t len = l->len;
    size_t pos = l->pos;
    struct abuf ab;

    while((plen+pos) >= l->cols) {
        buf++;
        len--;
        pos--;
    }
    while (plen+len > l->cols) {
        len--;
    }

    abInit(&ab);
    /* Cursor to left edge */
    snprintf(seq,64,"\r");
    abAppend(&ab,seq,strlen(seq));
    /* Write the prompt and the current buffer content */
    abAppend(&ab,l->prompt,strlen(l->prompt));
    abAppend(&ab,buf,len);
    /* Show hits if any. */
    refreshShowHints(&ab,l,plen);
    /* Erase to right */
    snprintf(seq,64,"\x1b[0K");
    abAppend(&ab,seq,strlen(seq));
    /* Move cursor to original position. */
    snprintf(seq,64,"\r\x1b[%dC", (int)(pos+plen));
    abAppend(&ab,seq,strlen(seq));
    if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */
    abFree(&ab);
}

/* Multi line low level line refresh.
 *
 * Rewrite the currently edited line accordingly to the buffer content,
 * cursor position, and number of columns of the terminal. */
static void refreshMultiLine(struct linenoiseState *l) {
    char seq[64];
    int plen = strlen(l->prompt);
    int rows = (plen+l->len+l->cols-1)/l->cols; /* rows used by current buf. */
    int rpos = (plen+l->oldpos+l->cols)/l->cols; /* cursor relative row. */
    int rpos2; /* rpos after refresh. */
    int col; /* colum position, zero-based. */
    int old_rows = l->maxrows;
    int fd = l->ofd, j;
    struct abuf ab;

    /* Update maxrows if needed. */
    if (rows > (int)l->maxrows) l->maxrows = rows;

    /* First step: clear all the lines used before. To do so start by
     * going to the last row. */
    abInit(&ab);
    if (old_rows-rpos > 0) {
        lndebug("go down %d", old_rows-rpos);
        snprintf(seq,64,"\x1b[%dB", old_rows-rpos);
        abAppend(&ab,seq,strlen(seq));
    }

    /* Now for every row clear it, go up. */
    for (j = 0; j < old_rows-1; j++) {
        lndebug("clear+up");
        snprintf(seq,64,"\r\x1b[0K\x1b[1A");
        abAppend(&ab,seq,strlen(seq));
    }

    /* Clean the top line. */
    lndebug("clear");
    snprintf(seq,64,"\r\x1b[0K");
    abAppend(&ab,seq,strlen(seq));

    /* Write the prompt and the current buffer content */
    abAppend(&ab,l->prompt,strlen(l->prompt));
    abAppend(&ab,l->buf,l->len);

    /* Show hits if any. */
    refreshShowHints(&ab,l,plen);

    /* If we are at the very end of the screen with our prompt, we need to
     * emit a newline and move the prompt to the first column. */
    if (l->pos &&
        l->pos == l->len &&
        (l->pos+plen) % l->cols == 0)
    {
        lndebug("<newline>");
        abAppend(&ab,"\n",1);
        snprintf(seq,64,"\r");
        abAppend(&ab,seq,strlen(seq));
        rows++;
        if (rows > (int)l->maxrows) l->maxrows = rows;
    }

    /* Move cursor to right position. */
    rpos2 = (plen+l->pos+l->cols)/l->cols; /* current cursor relative row. */
    lndebug("rpos2 %d", rpos2);

    /* Go up till we reach the expected positon. */
    if (rows-rpos2 > 0) {
        lndebug("go-up %d", rows-rpos2);
        snprintf(seq,64,"\x1b[%dA", rows-rpos2);
        abAppend(&ab,seq,strlen(seq));
    }

    /* Set column. */
    col = (plen+(int)l->pos) % (int)l->cols;
    lndebug("set col %d", 1+col);
    if (col)
        snprintf(seq,64,"\r\x1b[%dC", col);
    else
        snprintf(seq,64,"\r");
    abAppend(&ab,seq,strlen(seq));

    lndebug("\n");
    l->oldpos = l->pos;

    if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */
    abFree(&ab);
}

/* Calls the two low level functions refreshSingleLine() or
 * refreshMultiLine() according to the selected mode. */
static void refreshLine(struct linenoiseState *l) {
    if (mlmode)
        refreshMultiLine(l);
    else
        refreshSingleLine(l);
}

/* Insert the character 'c' at cursor current position.
 *
 * On error writing to the terminal -1 is returned, otherwise 0. */
int linenoiseEditInsert(struct linenoiseState *l, char c) {
    if (l->len < l->buflen) {
        if (l->len == l->pos) {
            l->buf[l->pos] = c;
            l->pos++;
            l->len++;
            l->buf[l->len] = '\0';
            if ((!mlmode && l->plen+l->len < l->cols && !hintsCallback)) {
                /* Avoid a full update of the line in the
                 * trivial case. */
                if (write(l->ofd,&c,1) == -1) return -1;
            } else {
                refreshLine(l);
            }
        } else {
            memmove(l->buf+l->pos+1,l->buf+l->pos,l->len-l->pos);
            l->buf[l->pos] = c;
            l->len++;
            l->pos++;
            l->buf[l->len] = '\0';
            refreshLine(l);
        }
    }
    return 0;
}

/* Move cursor on the left. */
void linenoiseEditMoveLeft(struct linenoiseState *l) {
    if (l->pos > 0) {
        l->pos--;
        refreshLine(l);
    }
}

/* Move cursor on the right. */
void linenoiseEditMoveRight(struct linenoiseState *l) {
    if (l->pos != l->len) {
        l->pos++;
        refreshLine(l);
    }
}

/* Move cursor to the start of the line. */
void linenoiseEditMoveHome(struct linenoiseState *l) {
    if (l->pos != 0) {
        l->pos = 0;
        refreshLine(l);
    }
}

/* Move cursor to the end of the line. */
void linenoiseEditMoveEnd(struct linenoiseState *l) {
    if (l->pos != l->len) {
        l->pos = l->len;
        refreshLine(l);
    }
}

/* Substitute the currently edited line with the next or previous history
 * entry as specified by 'dir'. */
#define LINENOISE_HISTORY_NEXT 0
#define LINENOISE_HISTORY_PREV 1
void linenoiseEditHistoryNext(struct linenoiseState *l, int dir) {
    if (history_len > 1) {
        /* Update the current history entry before to
         * overwrite it with the next one. */
        free(history[history_len - 1 - l->history_index]);
        history[history_len - 1 - l->history_index] = strdup(l->buf);
        /* Show the new entry */
        l->history_index += (dir == LINENOISE_HISTORY_PREV) ? 1 : -1;
        if (l->history_index < 0) {
            l->history_index = 0;
            return;
        } else if (l->history_index >= history_len) {
            l->history_index = history_len-1;
            return;
        }
        strncpy(l->buf,history[history_len - 1 - l->history_index],l->buflen);
        l->buf[l->buflen-1] = '\0';
        l->len = l->pos = strlen(l->buf);
        refreshLine(l);
    }
}

/* Delete the character at the right of the cursor without altering the cursor
 * position. Basically this is what happens with the "Delete" keyboard key. */
void linenoiseEditDelete(struct linenoiseState *l) {
    if (l->len > 0 && l->pos < l->len) {
        memmove(l->buf+l->pos,l->buf+l->pos+1,l->len-l->pos-1);
        l->len--;
        l->buf[l->len] = '\0';
        refreshLine(l);
    }
}

/* Backspace implementation. */
void linenoiseEditBackspace(struct linenoiseState *l) {
    if (l->pos > 0 && l->len > 0) {
        memmove(l->buf+l->pos-1,l->buf+l->pos,l->len-l->pos);
        l->pos--;
        l->len--;
        l->buf[l->len] = '\0';
        refreshLine(l);
    }
}

/* Delete the previosu word, maintaining the cursor at the start of the
 * current word. */
void linenoiseEditDeletePrevWord(struct linenoiseState *l) {
    size_t old_pos = l->pos;
    size_t diff;

    while (l->pos > 0 && l->buf[l->pos-1] == ' ')
        l->pos--;
    while (l->pos > 0 && l->buf[l->pos-1] != ' ')
        l->pos--;
    diff = old_pos - l->pos;
    memmove(l->buf+l->pos,l->buf+old_pos,l->len-old_pos+1);
    l->len -= diff;
    refreshLine(l);
}

/* This function is the core of the line editing capability of linenoise.
 * It expects 'fd' to be already in "raw mode" so that every key pressed
 * will be returned ASAP to read().
 *
 * The resulting string is put into 'buf' when the user type enter, or
 * when ctrl+d is typed.
 *
 * The function returns the length of the current buffer. */
static int linenoiseEdit(int stdin_fd, int stdout_fd, char *buf, size_t buflen, const char *prompt)
{
    struct linenoiseState l;

    /* Populate the linenoise state that we pass to functions implementing
     * specific editing functionalities. */
    l.ifd = stdin_fd;
    l.ofd = stdout_fd;
    l.buf = buf;
    l.buflen = buflen;
    l.prompt = prompt;
    l.plen = strlen(prompt);
    l.oldpos = l.pos = 0;
    l.len = 0;
    l.cols = getColumns(stdin_fd, stdout_fd);
    l.maxrows = 0;
    l.history_index = 0;

    /* Buffer starts empty. */
    l.buf[0] = '\0';
    l.buflen--; /* Make sure there is always space for the nulterm */

    /* The latest history entry is always our current buffer, that
     * initially is just an empty string. */
    linenoiseHistoryAdd("");

    if (write(l.ofd,prompt,l.plen) == -1) return -1;
    while(1) {
        char c;
        int nread;
        char seq[3];

        nread = read(l.ifd,&c,1);
        if (nread <= 0) return l.len;

        /* Only autocomplete when the callback is set. It returns < 0 when
         * there was an error reading from fd. Otherwise it will return the
         * character that should be handled next. */
        if (c == 9 && completionCallback != NULL) {
            c = completeLine(&l);
            /* Return on errors */
            if (c < 0) return l.len;
            /* Read next character when 0 */
            if (c == 0) continue;
        }

        switch(c) {
        case ENTER:    /* enter */
            history_len--;
            free(history[history_len]);
            if (mlmode) linenoiseEditMoveEnd(&l);
            if (hintsCallback) {
                /* Force a refresh without hints to leave the previous
                 * line as the user typed it after a newline. */
                linenoiseHintsCallback *hc = hintsCallback;
                hintsCallback = NULL;
                refreshLine(&l);
                hintsCallback = hc;
            }
            return (int)l.len;
        case CTRL_C:     /* ctrl-c */
            errno = EAGAIN;
            return -1;
/* http://example.com */
        case CTRL_Z:     /* ctrl-z */
#ifdef SIGTSTP
            /* send ourselves SIGSUSP */
            disableRawMode(STDIN_FILENO);
            raise(SIGTSTP);
            /* and resume */
            enableRawMode(STDIN_FILENO);
            refreshLine(&l);
#endif
            continue;
        case BACKSPACE:   /* backspace */
        case 8:     /* ctrl-h */
            linenoiseEditBackspace(&l);
            break;
        case CTRL_D:     /* ctrl-d, remove char at right of cursor, or if the
                            line is empty, act as end-of-file. */
            if (l.len > 0) {
                linenoiseEditDelete(&l);
            } else {
                history_len--;
                free(history[history_len]);
                return -1;
            }
            break;
        case CTRL_T:    /* ctrl-t, swaps current character with previous. */
            if (l.pos > 0 && l.pos < l.len) {
                int aux = buf[l.pos-1];
                buf[l.pos-1] = buf[l.pos];
                buf[l.pos] = aux;
                if (l.pos != l.len-1) l.pos++;
                refreshLine(&l);
            }
            break;
        case CTRL_B:     /* ctrl-b */
            linenoiseEditMoveLeft(&l);
            break;
        case CTRL_F:     /* ctrl-f */
            linenoiseEditMoveRight(&l);
            break;
        case CTRL_P:    /* ctrl-p */
            linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV);
            break;
        case CTRL_N:    /* ctrl-n */
            linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT);
            break;
        case ESC:    /* escape sequence */
            /* Read the next two bytes representing the escape sequence.
             * Use two calls to handle slow terminals returning the two
             * chars at different times. */
            if (read(l.ifd,seq,1) == -1) break;
            if (read(l.ifd,seq+1,1) == -1) break;

            /* ESC [ sequences. */
            if (seq[0] == '[') {
                if (seq[1] >= '0' && seq[1] <= '9') {
                    /* Extended escape, read additional byte. */
                    if (read(l.ifd,seq+2,1) == -1) break;
                    if (seq[2] == '~') {
                        switch(seq[1]) {
                        case '3': /* Delete key. */
                            linenoiseEditDelete(&l);
                            break;
                        }
                    }
                } else {
                    switch(seq[1]) {
                    case 'A': /* Up */
                        linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV);
                        break;
                    case 'B': /* Down */
                        linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT);
                        break;
                    case 'C': /* Right */
                        linenoiseEditMoveRight(&l);
                        break;
                    case 'D': /* Left */
                        linenoiseEditMoveLeft(&l);
                        break;
                    case 'H': /* Home */
                        linenoiseEditMoveHome(&l);
                        break;
                    case 'F': /* End*/
                        linenoiseEditMoveEnd(&l);
                        break;
                    }
                }
            }

            /* ESC O sequences. */
            else if (seq[0] == 'O') {
                switch(seq[1]) {
                case 'H': /* Home */
                    linenoiseEditMoveHome(&l);
                    break;
                case 'F': /* End*/
                    linenoiseEditMoveEnd(&l);
                    break;
                }
            }
            break;
        default:
            if (linenoiseEditInsert(&l,c)) return -1;
            break;
        case CTRL_U: /* Ctrl+u, delete the whole line. */
            buf[0] = '\0';
            l.pos = l.len = 0;
            refreshLine(&l);
            break;
        case CTRL_K: /* Ctrl+k, delete from current to end of line. */
            buf[l.pos] = '\0';
            l.len = l.pos;
            refreshLine(&l);
            break;
        case CTRL_A: /* Ctrl+a, go to the start of the line */
            linenoiseEditMoveHome(&l);
            break;
        case CTRL_E: /* ctrl+e, go to the end of the line */
            linenoiseEditMoveEnd(&l);
            break;
        case CTRL_L: /* ctrl+l, clear screen */
            linenoiseClearScreen();
            refreshLine(&l);
            break;
        case CTRL_W: /* ctrl+w, delete previous word */
            linenoiseEditDeletePrevWord(&l);
            break;
        }
    }
    return l.len;
}

/* This special mode is used by linenoise in order to print scan codes
 * on screen for debugging / development purposes. It is implemented
 * by the linenoise_example program using the --keycodes option. */
void linenoisePrintKeyCodes(void) {
    char quit[4];

    printf("Linenoise key codes debugging mode.\n"
            "Press keys to see scan codes. Type 'quit' at any time to exit.\n");
    if (enableRawMode(STDIN_FILENO) == -1) return;
    memset(quit,' ',4);
    while(1) {
        char c;
        int nread;

        nread = read(STDIN_FILENO,&c,1);
        if (nread <= 0) continue;
        memmove(quit,quit+1,sizeof(quit)-1); /* shift string to left. */
        quit[sizeof(quit)-1] = c; /* Insert current char on the right. */
        if (memcmp(quit,"quit",sizeof(quit)) == 0) break;

        printf("'%c' %02x (%d) (type quit to exit)\n",
            isprint(c) ? c : '?', (int)c, (int)c);
        printf("\r"); /* Go left edge manually, we are in raw mode. */
        fflush(stdout);
    }
    disableRawMode(STDIN_FILENO);
}

/* This function calls the line editing function linenoiseEdit() using
 * the STDIN file descriptor set in raw mode. */
static int linenoiseRaw(char *buf, size_t buflen, const char *prompt) {
    int count;

    if (buflen == 0) {
        errno = EINVAL;
        return -1;
    }

    if (enableRawMode(STDIN_FILENO) == -1) return -1;
    count = linenoiseEdit(STDIN_FILENO, STDOUT_FILENO, buf, buflen, prompt);
    disableRawMode(STDIN_FILENO);
    printf("\n");
    return count;
}

/* This function is called when linenoise() is called with the standard
 * input file descriptor not attached to a TTY. So for example when the
 * program using linenoise is called in pipe or with a file redirected
 * to its standard input. In this case, we want to be able to return the
 * line regardless of its length (by default we are limited to 4k). */
static char *linenoiseNoTTY(void) {
    char *line = NULL;
    size_t len = 0, maxlen = 0;

    while(1) {
        if (len == maxlen) {
            if (maxlen == 0) maxlen = 16;
            maxlen *= 2;
            char *oldval = line;
            line = (char*) realloc(line,maxlen);
            if (line == NULL) {
                if (oldval) free(oldval);
                return NULL;
            }
        }
        int c = fgetc(stdin);
        if (c == EOF || c == '\n') {
            if (c == EOF && len == 0) {
                free(line);
                return NULL;
            } else {
                line[len] = '\0';
                return line;
            }
        } else {
            line[len] = c;
            len++;
        }
    }
}

/* The high level function that is the main API of the linenoise library.
 * This function checks if the terminal has basic capabilities, just checking
 * for a blacklist of stupid terminals, and later either calls the line
 * editing function or uses dummy fgets() so that you will be able to type
 * something even in the most desperate of the conditions. */
char *linenoise(const char *prompt) {
    char buf[LINENOISE_MAX_LINE];
    int count;

    if (!isatty(STDIN_FILENO)) {
        /* Not a tty: read from file / pipe. In this mode we don't want any
         * limit to the line size, so we call a function to handle that. */
        return linenoiseNoTTY();
    } else if (isUnsupportedTerm()) {
        size_t len;

        printf("%s",prompt);
        fflush(stdout);
        if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) return NULL;
        len = strlen(buf);
        while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) {
            len--;
            buf[len] = '\0';
        }
        return strdup(buf);
    } else {
        count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt);
        if (count == -1) return NULL;
        return strdup(buf);
    }
}

/* This is just a wrapper the user may want to call in order to make sure
 * the linenoise returned buffer is freed with the same allocator it was
 * created with. Useful when the main program is using an alternative
 * allocator. */
void linenoiseFree(void *ptr) {
    free(ptr);
}

/* ================================ History ================================= */

/* Free the history, but does not reset it. Only used when we have to
 * exit() to avoid memory leaks are reported by valgrind & co. */
static void freeHistory(void) {
    if (history) {
        int j;

        for (j = 0; j < history_len; j++)
            free(history[j]);
        free(history);
    }
}

/* At exit we'll try to fix the terminal to the initial conditions. */
static void linenoiseAtExit(void) {
    disableRawMode(STDIN_FILENO);
    freeHistory();
}

/* This is the API call to add a new entry in the linenoise history.
 * It uses a fixed array of char pointers that are shifted (memmoved)
 * when the history max length is reached in order to remove the older
 * entry and make room for the new one, so it is not exactly suitable for huge
 * histories, but will work well for a few hundred of entries.
 *
 * Using a circular buffer is smarter, but a bit more complex to handle. */
int linenoiseHistoryAdd(const char *line) {
    char *linecopy;

    if (history_max_len == 0) return 0;

    /* Initialization on first call. */
    if (history == NULL) {
        history = (char**) malloc(sizeof(char*)*history_max_len);
        if (history == NULL) return 0;
        memset(history,0,(sizeof(char*)*history_max_len));
    }

    /* Don't add duplicated lines. */
    if (history_len && !strcmp(history[history_len-1], line)) return 0;

    /* Add an heap allocated copy of the line in the history.
     * If we reached the max length, remove the older line. */
    linecopy = strdup(line);
    if (!linecopy) return 0;
    if (history_len == history_max_len) {
        free(history[0]);
        memmove(history,history+1,sizeof(char*)*(history_max_len-1));
        history_len--;
    }
    history[history_len] = linecopy;
    history_len++;
    return 1;
}

/* Set the maximum length for the history. This function can be called even
 * if there is already some history, the function will make sure to retain
 * just the latest 'len' elements if the new history length value is smaller
 * than the amount of items already inside the history. */
int linenoiseHistorySetMaxLen(int len) {
    char **ptr;

    if (len < 1) return 0;
    if (history) {
        int tocopy = history_len;

        ptr = (char**) malloc(sizeof(char*)*len);
        if (ptr == NULL) return 0;

        /* If we can't copy everything, free the elements we'll not use. */
        if (len < tocopy) {
            int j;

            for (j = 0; j < tocopy-len; j++) free(history[j]);
            tocopy = len;
        }
        memset(ptr,0,sizeof(char*)*len);
        memcpy(ptr,history+(history_len-tocopy), sizeof(char*)*tocopy);
        free(history);
        history = ptr;
    }
    history_max_len = len;
    if (history_len > history_max_len)
        history_len = history_max_len;
    return 1;
}

/* Save the history in the specified file. On success 0 is returned
 * otherwise -1 is returned. */
int linenoiseHistorySave(const char *filename) {
    mode_t old_umask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
    FILE *fp;
    int j;

    fp = fopen(filename,"w");
    umask(old_umask);
    if (fp == NULL) return -1;
    chmod(filename,S_IRUSR|S_IWUSR);
    for (j = 0; j < history_len; j++)
        fprintf(fp,"%s\n",history[j]);
    fclose(fp);
    return 0;
}

/* Load the history from the specified file. If the file does not exist
 * zero is returned and no operation is performed.
 *
 * If the file exists and the operation succeeded 0 is returned, otherwise
 * on error -1 is returned. */
int linenoiseHistoryLoad(const char *filename) {
    FILE *fp = fopen(filename,"r");
    char buf[LINENOISE_MAX_LINE];

    if (fp == NULL) return -1;


switch(alPropID)
	{
	case eBoneInt_ParentBoneID:
		{
			int lID = -1;
			if(mpParentBone) lID = mpParentBone->GetID();
			alX = lID;
			break;
		}
	default:
		return iEntityWrapper::GetProperty(alPropID, alX);
	}

/*
 *
 * This file is part of Amnesia: A Machine For Pigs.
 *
 */

#include "EntityWrapperBone.h"
#include "EditorWorld.h"
#include "EditorEditMode.h"
#include "EditorEditModeSelect.h"
#include "EditorHelper.h"
#include "EditorWindowViewport.h"
#include "EngineEntity.h"

#include "EditorWindowEntityEditBoxBone.h"

#include <algorithm>

cEntityWrapperTypeBone::cEntityWrapperTypeBone() : iEntityWrapperType(eEditorEntityType_Bone, _W("Bone"), "Bone")
{
	AddInt(eBoneInt_ParentBoneID, "ParentBoneID", -1, ePropCopyStep_PostDeployAll, false);

	GetPropBool(eObjBool_Active)->SetSaved(false);
	GetPropVec3f(eObjVec3f_Position)->SetSaved(false);
	GetPropVec3f(eObjVec3f_Rotation)->SetSaved(false);
	GetPropVec3f(eObjVec3f_Scale)->SetSaved(false);

	GetPropString(eObjStr_Tag)->SetSaved(false);

	mbCanTranslate = false;
	mbCanRotate = false;
	mScaleType = eScaleType_None;
	mbRenameable = false;
	mbDeletable = false;
	mbCloneable = false;

	mvAttachableTypes.push_back(eEditorEntityType_Light);
	mvAttachableTypes.push_back(eEditorEntityType_Billboard);
	mvAttachableTypes.push_back(eEditorEntityType_Sound);
	mvAttachableTypes.push_back(eEditorEntityType_ParticleSystem);
}

tIntList cEntityWrapperTypeBone::GetBoneIDs()
{
	tEntityWrapperList lstBones;
	lstBones.insert(lstBones.end(), mvBones.begin(), mvBones.end());

	tIntList lstIDs;
	cEditorHelper::GetIDsFromEntityList(lstBones, lstIDs);

	return lstIDs;
}

void cEntityWrapperTypeBone::AddBone(cEntityWrapperBone* apBone)
{
	if(apBone) mvBones.push_back(apBone);
}

void cEntityWrapperTypeBone::RemoveBone(cEntityWrapperBone* apBone)
{
	tBoneWrapperVecIt it = find(mvBones.begin(), mvBones.end(), apBone);
	mvBones.erase(it);
}

void cEntityWrapperTypeBone::ClearBones(bool abRemoveFromWorld)
{
	for(int i=0;i<(int)mvBones.size();++i)
		mpWorld->DestroyEntityWrapper(mvBones[i], abRemoveFromWorld);

	mvBones.clear();
}

iEntityWrapperData* cEntityWrapperTypeBone::CreateSpecificData()
{
	return hplNew(cEntityWrapperDataBone,(this));
}

cEntityWrapperDataBone::cEntityWrapperDataBone(iEntityWrapperType* apType) : iEntityWrapperData(apType)
{
}

iEntityWrapper* cEntityWrapperDataBone::CreateSpecificEntity()
{
	return hplNew(cEntityWrapperBone,(this));
}

cEntityWrapperBone::cEntityWrapperBone(iEntityWrapperData* apData) : iEntityWrapper(apData)
{
	mpParentBone = NULL;
	mpVBBone = NULL;
}

cEntityWrapperBone::~cEntityWrapperBone()
{
	if(mpVBBone)
		hplDelete(mpVBBone);
}

bool cEntityWrapperBone::SetProperty(int alPropID, const int& alX)
{
	switch(alPropID)
	{
	case eBoneInt_ParentBoneID:
		{
			cEntityWrapperBone* pEnt = (cEntityWrapperBone*)GetEditorWorld()->GetEntity(alX);
			SetParentBone(pEnt);
			break;
		}
	default:
		return iEntityWrapper::SetProperty(alPropID, alX);
	}

	return true;
}

bool cEntityWrapperBone::GetProperty(int alPropID, int& alX)
{

	return true;
}

bool cEntityWrapperBone::CheckRayIntersect(cEditorWindowViewport* apViewport, cVector3f* apPos, tVector3fVec* apTriangle, float* apT)
{
	bool bIntersect = false;
	float fMinT = 9999.0f;
	cVector3f vMinPos = 9999.0f;

	const cVector3f& vStart = apViewport->GetUnprojectedStart();
	const cVector3f& vEnd = apViewport->GetUnprojectedEnd();

	// Check joint
	{
		float fT1, fT2;
		cVector3f vPos1, vPos2;
		if(cMath::CheckSphereLineIntersection(mvPosition, 0.01f, vStart, vEnd, &fT1, &vPos1, &fT2, &vPos2))
		{
			bIntersect=true;
			if(fT1<fMinT)
			{
				fMinT = fT1;
				vMinPos = vPos1;
			}
			if(fT2<fMinT)
			{
				fMinT = fT2;
				vMinPos = vPos2;
			}
		}
	}

	// Check Links to children
	for(int i=0;i<(int)mvChildBones.size();++i)
	{
		float fT;
		cVector3f vPos;
		cEntityWrapperBone* pBone = mvChildBones[i];
		if(cMath::CheckLineTriVertexBufferIntersection(	vStart, vEnd, cMatrixf::Identity, pBone->GetBoneVB(), &vPos,
														&fT, NULL))
		{
			bIntersect=true;
			if(fT<fMinT)
			{
				fMinT = fT;
				vMinPos = vPos;
			}
		}
	}

	if(apPos)
		*apPos = vMinPos;
	if(apT)
		*apT = fMinT;

	return bIntersect;
}

cEditorWindowEntityEditBox* cEntityWrapperBone::CreateEditBox(cEditorEditModeSelect* apEditMode)
{
	return hplNew(cEditorWindowEntityEditBoxBone,(apEditMode, this));
}

void cEntityWrapperBone::SetParentBone(cEntityWrapperBone* apBone)
{
	if(mpParentBone!=NULL && mpParentBone==apBone)
		return;

	if(mpParentBone)
		mpParentBone->RemoveChildBone(this);

	mpParentBone = apBone;

	if(mpParentBone)
		mpParentBone->AddChildBone(this);

	CreateLinkToParent();
}

void cEntityWrapperBone::AddChildBone(cEntityWrapperBone* apBone)
{
	if(apBone==NULL)
		return;

	for(int i=0;i<(int)mvChildBones.size();++i)
	{
		if(apBone==mvChildBones[i])
			return;
	}

	mvChildBones.push_back(apBone);
}

void cEntityWrapperBone::RemoveChildBone(cEntityWrapperBone* apBone)
{
	if(apBone==NULL)
		return;

	std::vector<cEntityWrapperBone*>::iterator it = find(mvChildBones.begin(), mvChildBones.end(), apBone);
	if(it!=mvChildBones.end())
		mvChildBones.erase(it);
}

void cEntityWrapperBone::Draw(cEditorWindowViewport* apViewport, cRendererCallbackFunctions* apFunctions,
							  iEditorEditMode* apEditMode, bool abIsSelected, const cColor& aHighlightCol, const cColor& aDisabledCol)
{
	iEntityWrapper::Draw(apViewport, apFunctions, apEditMode, abIsSelected);
	cColor colJoint = abIsSelected?cColor(0,1,0,1):cColor(1,0,0,1);

	apFunctions->SetDepthTest(false);
	apFunctions->SetDepthWrite(false);
	apFunctions->GetLowLevelGfx()->DrawSphere(mvPosition, 0.01f, colJoint);
	DrawBone(apViewport, apFunctions, apEditMode, abIsSelected);
	for(int i=0;i<(int)mvChildBones.size();++i)
		mvChildBones[i]->DrawBone(apViewport, apFunctions, apEditMode, abIsSelected);
}

void cEntityWrapperBone::DrawBone(cEditorWindowViewport* apViewport, cRendererCallbackFunctions* apFunctions, iEditorEditMode* apEditMode, bool abIsSelected)
{
	if(mpVBBone)
	{
		apFunctions->SetProgram(NULL);
		apFunctions->SetTextureRange(NULL,0);
		apFunctions->SetMatrix(NULL);

		apFunctions->SetTexture(0, NULL);

		apFunctions->SetVertexBuffer(mpVBBone);
		apFunctions->DrawCurrent();
	}
}

void cEntityWrapperBone::OnSetSelected(bool abX)
{
	iEntityWrapper::OnSetSelected(abX);
	for(int i=0;i<(int)this->mvChildBones.size();++i)
	{
		cEntityWrapperBone* pChildBone = mvChildBones[i];
        pChildBone->SetBoneVBColor(abX?cColor(1,1):cColor(0.3f,1));
	}
}

void cEntityWrapperBone::SetBoneVBColor(const cColor& aCol)
{
	if(mpVBBone==NULL)
		return;

	float *fColArray = mpVBBone->GetFloatArray(eVertexBufferElement_Color0);
	int lStride = mpVBBone->GetElementNum(eVertexBufferElement_Color0);

	for(int i=0;i<mpVBBone->GetVertexNum();++i)
	{
		fColArray[i*lStride] = aCol.r;
		fColArray[i*lStride+1] = aCol.g;
		fColArray[i*lStride+2] = aCol.b;
		fColArray[i*lStride+3] = aCol.a;
	}

	mpVBBone->UpdateData(eVertexElementFlag_Color0, false);
}

void cEntityWrapperBone::CreateLinkToParent()
{
	if(mpParentBone==NULL)
		return;

	cVector3f vDirToParent = mpParentBone->GetPosition()-mvPosition;
	float fLength = vDirToParent.Length();
	vDirToParent=vDirToParent/fLength;

	cMeshCreator* pCreator = GetEditorWorld()->GetEditor()->GetEngine()->GetGraphics()->GetMeshCreator();
    cMesh* pMesh = pCreator->CreateCone("", cVector2f(0.01f, fLength), 4, "editor_rect.mat");

	mpVBBone = pMesh->GetSubMesh(0)->GetVertexBuffer()->CreateCopy(eVertexBufferType_Hardware, eVertexBufferUsageType_Dynamic,
																	eVertexElementFlag_Normal | eVertexElementFlag_Position |
																	eVertexElementFlag_Color0 | eVertexElementFlag_Texture0);

	hplDelete(pMesh);

	cVector3f vUp = mvPosition-mpParentBone->GetPosition();

	cVector3f vRight, vFwd;
	cVector3f vWorldRight = cVector3f(1,0,0);

	vRight = vWorldRight - cMath::Vector3Cross(cMath::Vector3Dot(vWorldRight, vUp), vUp);
	vRight = cMath::Vector3Project(vRight, vWorldRight);
	vFwd = cMath::Vector3Cross(vRight, vUp);

	cMath::Vector3OrthonormalizeBasis(vUp, vRight, vFwd, vUp, vRight, vFwd);

	cMatrixf mtxRotation = cMath::MatrixInverse(cMath::MatrixUnitVectors(vRight, vUp, vFwd,0)).GetTranspose();
	mpVBBone->Transform(cMath::MatrixMul(cMath::MatrixTranslate(mvPosition),cMath::MatrixMul(mtxRotation, cMath::MatrixTranslate(cVector3f(0,-fLength*0.5f,0)))));

	SetBoneVBColor(cColor(0.3f,1));
}

void cEntityWrapperBone::OnAddToWorld()
{
	cEntityWrapperTypeBone* pType = (cEntityWrapperTypeBone*)mpType;
	pType->AddBone(this);
}


oboe::AudioStreamBuilder *LiveEffectEngine::setupRecordingStreamParameters(
    oboe::AudioStreamBuilder *builder, int32_t sampleRate) {
    // This sample uses blocking read() because we don't specify a callback
    builder->setDeviceId(mRecordingDeviceId)
        ->setDirection(oboe::Direction::Input)
        ->setSampleRate(sampleRate)
        ->setChannelCount(mInputChannelCount);
    return setupCommonStreamParameters(builder);
}

/**
 *
 */

#include <cassert>
#include <logging_macros.h>

#include "LiveEffectEngine.h"

LiveEffectEngine::LiveEffectEngine() {
    assert(mOutputChannelCount == mInputChannelCount);
}

void LiveEffectEngine::setRecordingDeviceId(int32_t deviceId) {
    mRecordingDeviceId = deviceId;
}

void LiveEffectEngine::setPlaybackDeviceId(int32_t deviceId) {
    mPlaybackDeviceId = deviceId;
}

bool LiveEffectEngine::isAAudioRecommended() {
    return oboe::AudioStreamBuilder::isAAudioRecommended();
}

bool LiveEffectEngine::setAudioApi(oboe::AudioApi api) {
    if (mIsEffectOn) return false;
    mAudioApi = api;
    return true;
}

bool LiveEffectEngine::setEffectOn(bool isOn) {
    bool success = true;
    if (isOn != mIsEffectOn) {
        if (isOn) {
            success = openStreams() == oboe::Result::OK;
            if (success) {
                mFullDuplexPass.start();
                mIsEffectOn = isOn;
            }
        } else {
            mFullDuplexPass.stop();
            closeStreams();
            mIsEffectOn = isOn;
       }
    }
    return success;
}

void LiveEffectEngine::closeStreams() {
    /*
    * Note: The order of events is important here.
    * The playback stream must be closed before the recording stream. If the
    * recording stream were to be closed first the playback stream's
    * callback may attempt to read from the recording stream
    * which would cause the app to crash since the recording stream would be
    * null.
    */
    closeStream(mPlayStream);
    mFullDuplexPass.setOutputStream(nullptr);

    closeStream(mRecordingStream);
    mFullDuplexPass.setInputStream(nullptr);
}

oboe::Result  LiveEffectEngine::openStreams() {
    // Note: The order of stream creation is important. We create the playback
    // stream first, then use properties from the playback stream
    // (e.g. sample rate) to create the recording stream. By matching the
    // properties we should get the lowest latency path
    oboe::AudioStreamBuilder inBuilder, outBuilder;
    setupPlaybackStreamParameters(&outBuilder);
    oboe::Result result = outBuilder.openStream(mPlayStream);
    if (result != oboe::Result::OK) {
        LOGE("Failed to open output stream. Error %s", oboe::convertToText(result));
        mSampleRate = oboe::kUnspecified;
        return result;
    } else {
        // The input stream needs to run at the same sample rate as the output.
        mSampleRate = mPlayStream->getSampleRate();
    }
    warnIfNotLowLatency(mPlayStream);

    setupRecordingStreamParameters(&inBuilder, mSampleRate);
    result = inBuilder.openStream(mRecordingStream);
    if (result != oboe::Result::OK) {
        LOGE("Failed to open input stream. Error %s", oboe::convertToText(result));
        closeStream(mPlayStream);
        return result;
    }
    warnIfNotLowLatency(mRecordingStream);

    mFullDuplexPass.setInputStream(mRecordingStream);
    mFullDuplexPass.setOutputStream(mPlayStream);
    return result;
}

/**
 * Sets the stream parameters which are specific to recording,
 * including the sample rate which is determined from the
 * playback stream.
 *
 * @param builder The recording stream builder
 * @param sampleRate The desired sample rate of the recording stream
 */

/**
 * Sets the stream parameters which are specific to playback, including device
 * id and the dataCallback function, which must be set for low latency
 * playback.
 * @param builder The playback stream builder
 */
oboe::AudioStreamBuilder *LiveEffectEngine::setupPlaybackStreamParameters(
    oboe::AudioStreamBuilder *builder) {
    builder->setDataCallback(this)
        ->setErrorCallback(this)
        ->setDeviceId(mPlaybackDeviceId)
        ->setDirection(oboe::Direction::Output)
        ->setChannelCount(mOutputChannelCount);

    return setupCommonStreamParameters(builder);
}

/**
 * Set the stream parameters which are common to both recording and playback
 * streams.
 * @param builder The playback or recording stream builder
 */
oboe::AudioStreamBuilder *LiveEffectEngine::setupCommonStreamParameters(
    oboe::AudioStreamBuilder *builder) {
    // We request EXCLUSIVE mode since this will give us the lowest possible
    // If EXCLUSIVE mode isn't available the builder will fall back to SHARED
    builder->setAudioApi(mAudioApi)
        ->setFormat(mFormat)
        ->setFormatConversionAllowed(true)
        ->setSharingMode(oboe::SharingMode::Exclusive)
        ->setPerformanceMode(oboe::PerformanceMode::LowLatency);
    return builder;
}

/**
 * Close the stream. AudioStream::close() is a blocking call so
 * the application does not need to add synchronization between
 * onAudioReady() function and the thread calling close().
 * [the closing thread is the UI thread in this sample].
 * @param stream the stream to close
 */
void LiveEffectEngine::closeStream(std::shared_ptr<oboe::AudioStream> &stream) {
    if (stream) {
        oboe::Result result = stream->stop();
        if (result != oboe::Result::OK) {
            LOGW("Error stopping stream: %s", oboe::convertToText(result));
        }
        result = stream->close();
        if (result != oboe::Result::OK) {
            LOGE("Error closing stream: %s", oboe::convertToText(result));
        } else {
            LOGW("Successfully closed streams");
        }
        stream.reset();
    }
}

/**
 * Warn in logcat if non-low latency stream is created
 * @param stream: newly created stream
 *
 */
void LiveEffectEngine::warnIfNotLowLatency(std::shared_ptr<oboe::AudioStream> &stream) {
    if (stream->getPerformanceMode() != oboe::PerformanceMode::LowLatency) {
        LOGW(
            "Stream is NOT low latency."
            "Check your requested format, sample rate and channel count");
    }
}

/**
 * Handles playback stream's audio request. In this sample, we simply block-read
 * from the record stream for the required samples.
 *
 * @param oboeStream: the playback stream that requesting additional samples
 * @param audioData:  the buffer to load audio samples for playback stream
 * @param numFrames:  number of frames to load to audioData buffer
 * @return: DataCallbackResult::Continue.
 */
oboe::DataCallbackResult LiveEffectEngine::onAudioReady(
    oboe::AudioStream *oboeStream, void *audioData, int32_t numFrames) {
    return mFullDuplexPass.onAudioReady(oboeStream, audioData, numFrames);
}

/**
 * Oboe notifies the application for "about to close the stream".
 *
 * @param oboeStream: the stream to close
 * @param error: oboe's reason for closing the stream
 */
void LiveEffectEngine::onErrorBeforeClose(oboe::AudioStream *oboeStream,
                                          oboe::Result error) {
    LOGE("%s stream Error before close: %s",
         oboe::convertToText(oboeStream->getDirection()),
         oboe::convertToText(error));
}

/**
 * Oboe notifies application that "the stream is closed"
 *
 * @param oboeStream
 * @param error
 */
void LiveEffectEngine::onErrorAfterClose(oboe::AudioStream *oboeStream,
                                         oboe::Result error) {
    LOGE("%s stream Error after close: %s",
         oboe::convertToText(oboeStream->getDirection()),
         oboe::convertToText(error));
}


ComponentInterfaceSymbol EffectAutoDuck::GetSymbol()
{
   return Symbol;
}

/**********************************************************************

  Audacity: A Digital Audio Editor

  AutoDuck.cpp

  Markus Meyer

*******************************************************************//**

\class EffectAutoDuck
\brief Implements the Auto Ducking effect

\class AutoDuckRegion
\brief a struct that holds a start and end time.

*******************************************************************/

#include "AutoDuck.h"
#include "LoadEffects.h"

#include <math.h>
#include <float.h>

#include <wx/dcclient.h>
#include <wx/dcmemory.h>
#include <wx/intl.h>

#include "../AColor.h"
#include "../AllThemeResources.h"
#include "../Prefs.h"
#include "../Shuttle.h"
#include "../ShuttleGui.h"
#include "../Theme.h"
#include "../widgets/valnum.h"

#include "../WaveTrack.h"
#include "../widgets/AudacityMessageBox.h"

// Define keys, defaults, minimums, and maximums for the effect parameters
//     Name                Type     Key                     Def      Min      Max      Scale
Param( DuckAmountDb,       double,  wxT("DuckAmountDb"),     -12.0,   -24.0,   0.0,     1  );
Param( InnerFadeDownLen,   double,  wxT("InnerFadeDownLen"), 0.0,     0.0,     3.0,     1  );
Param( InnerFadeUpLen,     double,  wxT("InnerFadeUpLen"),   0.0,     0.0,     3.0,     1  );
Param( OuterFadeDownLen,   double,  wxT("OuterFadeDownLen"), 0.5,     0.0,     3.0,     1  );
Param( OuterFadeUpLen,     double,  wxT("OuterFadeUpLen"),   0.5,     0.0,     3.0,     1  );
Param( ThresholdDb,        double,  wxT("ThresholdDb"),      -30.0,   -100.0,  0.0,     1  );
Param( MaximumPause,       double,  wxT("MaximumPause"),     1.0,     0.0,     DBL_MAX, 1  );

/*
 * Common constants
 */

static const size_t kBufSize = 131072u;     // number of samples to process at once
static const size_t kRMSWindowSize = 100u;  // samples in circular RMS window buffer

/*
 * A auto duck region and an array of auto duck regions
 */

struct AutoDuckRegion
{
   AutoDuckRegion(double t0, double t1)
   {
      this->t0 = t0;
      this->t1 = t1;
   }

   double t0;
   double t1;
};

/*
 * Effect implementation
 */

const ComponentInterfaceSymbol EffectAutoDuck::Symbol
{ XO("Auto Duck") };

namespace{ BuiltinEffectsModule::Registration< EffectAutoDuck > reg; }

BEGIN_EVENT_TABLE(EffectAutoDuck, wxEvtHandler)
   EVT_TEXT(wxID_ANY, EffectAutoDuck::OnValueChanged)
END_EVENT_TABLE()

EffectAutoDuck::EffectAutoDuck()
{
   mDuckAmountDb = DEF_DuckAmountDb;
   mInnerFadeDownLen = DEF_InnerFadeDownLen;
   mInnerFadeUpLen = DEF_InnerFadeUpLen;
   mOuterFadeDownLen = DEF_OuterFadeDownLen;
   mOuterFadeUpLen = DEF_OuterFadeUpLen;
   mThresholdDb = DEF_ThresholdDb;
   mMaximumPause = DEF_MaximumPause;

   SetLinearEffectFlag(true);

   mControlTrack = NULL;

   mPanel = NULL;
}

EffectAutoDuck::~EffectAutoDuck()
{
}

// ComponentInterface implementation

TranslatableString EffectAutoDuck::GetDescription()
{
   return XO("Reduces (ducks) the volume of one or more tracks whenever the volume of a specified \"control\" track reaches a particular level");
}

ManualPageID EffectAutoDuck::ManualPage()
{
   return L"Auto_Duck";
}

// EffectDefinitionInterface implementation

EffectType EffectAutoDuck::GetType()
{
   return EffectTypeProcess;
}

// EffectClientInterface implementation
bool EffectAutoDuck::DefineParams( ShuttleParams & S ){
   S.SHUTTLE_PARAM(  mDuckAmountDb, DuckAmountDb);
   S.SHUTTLE_PARAM(  mInnerFadeDownLen, InnerFadeDownLen);
   S.SHUTTLE_PARAM(  mInnerFadeUpLen, InnerFadeUpLen);
   S.SHUTTLE_PARAM(  mOuterFadeDownLen, OuterFadeDownLen);
   S.SHUTTLE_PARAM(  mOuterFadeUpLen, OuterFadeUpLen);
   S.SHUTTLE_PARAM(  mThresholdDb, ThresholdDb);
   S.SHUTTLE_PARAM(  mMaximumPause, MaximumPause);
   return true;
}

bool EffectAutoDuck::GetAutomationParameters(CommandParameters & parms)
{
   parms.Write(KEY_DuckAmountDb, mDuckAmountDb);
   parms.Write(KEY_InnerFadeDownLen, mInnerFadeDownLen);
   parms.Write(KEY_InnerFadeUpLen, mInnerFadeUpLen);
   parms.Write(KEY_OuterFadeDownLen, mOuterFadeDownLen);
   parms.Write(KEY_OuterFadeUpLen, mOuterFadeUpLen);
   parms.Write(KEY_ThresholdDb, mThresholdDb);
   parms.Write(KEY_MaximumPause, mMaximumPause);

   return true;
}

bool EffectAutoDuck::SetAutomationParameters(CommandParameters & parms)
{
   ReadAndVerifyDouble(DuckAmountDb);
   ReadAndVerifyDouble(InnerFadeDownLen);
   ReadAndVerifyDouble(InnerFadeUpLen);
   ReadAndVerifyDouble(OuterFadeDownLen);
   ReadAndVerifyDouble(OuterFadeUpLen);
   ReadAndVerifyDouble(ThresholdDb);
   ReadAndVerifyDouble(MaximumPause);

   mDuckAmountDb = DuckAmountDb;
   mInnerFadeDownLen = InnerFadeDownLen;
   mInnerFadeUpLen = InnerFadeUpLen;
   mOuterFadeDownLen = OuterFadeDownLen;
   mOuterFadeUpLen = OuterFadeUpLen;
   mThresholdDb = ThresholdDb;
   mMaximumPause = MaximumPause;

   return true;
}

// Effect implementation

bool EffectAutoDuck::Startup()
{
   wxString base = wxT("/Effects/AutoDuck/");

   // Migrate settings from 2.1.0 or before

   // Already migrated, so bail
   if (gPrefs->Exists(base + wxT("Migrated")))
   {
      return true;
   }

   // Load the old "current" settings
   if (gPrefs->Exists(base))
   {
      gPrefs->Read(base + wxT("DuckAmountDb"), &mDuckAmountDb, DEF_DuckAmountDb);
      gPrefs->Read(base + wxT("InnerFadeDownLen"), &mInnerFadeDownLen, DEF_InnerFadeDownLen);
      gPrefs->Read(base + wxT("InnerFadeUpLen"), &mInnerFadeUpLen, DEF_InnerFadeUpLen);
      gPrefs->Read(base + wxT("OuterFadeDownLen"), &mOuterFadeDownLen, DEF_OuterFadeDownLen);
      gPrefs->Read(base + wxT("OuterFadeUpLen"), &mOuterFadeUpLen, DEF_OuterFadeUpLen);
      gPrefs->Read(base + wxT("ThresholdDb"), &mThresholdDb, DEF_ThresholdDb);
      gPrefs->Read(base + wxT("MaximumPause"), &mMaximumPause, DEF_MaximumPause);

      SaveUserPreset(GetCurrentSettingsGroup());

      // Do not migrate again
      gPrefs->Write(base + wxT("Migrated"), true);
      gPrefs->Flush();
   }

   return true;
}

bool EffectAutoDuck::Init()
{
   mControlTrack = NULL;

   bool lastWasSelectedWaveTrack = false;
   const WaveTrack *controlTrackCandidate = NULL;

   for (auto t : inputTracks()->Any())
   {
      if (lastWasSelectedWaveTrack && !t->GetSelected()) {
         // This could be the control track, so remember it
         controlTrackCandidate = track_cast<const WaveTrack *>(t);
      }

      lastWasSelectedWaveTrack = false;

      if (t->GetSelected()) {
         bool ok = t->TypeSwitch<bool>(
            [&](const WaveTrack *) {
               lastWasSelectedWaveTrack = true;
               return true;
            },
            [&](const Track *) {
               Effect::MessageBox(
                  /* i18n-hint: Auto duck is the name of an effect that 'ducks' (reduces the volume)
                   * of the audio automatically when there is sound on another track.  Not as
                   * in 'Donald-Duck'!*/
                  XO("You selected a track which does not contain audio. AutoDuck can only process audio tracks."),
                  wxICON_ERROR );
               return false;
            }
         );
         if (!ok)
            return false;
      }
   }

   if (!controlTrackCandidate)
   {
      Effect::MessageBox(
         /* i18n-hint: Auto duck is the name of an effect that 'ducks' (reduces the volume)
          * of the audio automatically when there is sound on another track.  Not as
          * in 'Donald-Duck'!*/
         XO("Auto Duck needs a control track which must be placed below the selected track(s)."),
         wxICON_ERROR );
      return false;
   }

   mControlTrack = controlTrackCandidate;

   return true;
}

void EffectAutoDuck::End()
{
   mControlTrack = NULL;
}

bool EffectAutoDuck::Process()
{
   if (GetNumWaveTracks() == 0 || !mControlTrack)
      return false;

   bool cancel = false;

   auto start =
      mControlTrack->TimeToLongSamples(mT0 + mOuterFadeDownLen);
   auto end =
      mControlTrack->TimeToLongSamples(mT1 - mOuterFadeUpLen);

   if (end <= start)
      return false;

   // the minimum number of samples we have to wait until the maximum
   // pause has been exceeded
   double maxPause = mMaximumPause;

   // We don't fade in until we have time enough to actually fade out again
   if (maxPause < mOuterFadeDownLen + mOuterFadeUpLen)
      maxPause = mOuterFadeDownLen + mOuterFadeUpLen;

   auto minSamplesPause =
      mControlTrack->TimeToLongSamples(maxPause);

   double threshold = DB_TO_LINEAR(mThresholdDb);

   // adjust the threshold so we can compare it to the rmsSum value
   threshold = threshold * threshold * kRMSWindowSize;

   int rmsPos = 0;
   float rmsSum = 0;
   // to make the progress bar appear more natural, we first look for all
   // duck regions and apply them all at once afterwards
   std::vector<AutoDuckRegion> regions;
   bool inDuckRegion = false;
   {
      Floats rmsWindow{ kRMSWindowSize, true };

      Floats buf{ kBufSize };

      // initialize the following two variables to prevent compiler warning
      double duckRegionStart = 0;
      sampleCount curSamplesPause = 0;

      auto pos = start;

      while (pos < end)
      {
         const auto len = limitSampleBufferSize( kBufSize, end - pos );

         mControlTrack->GetFloats(buf.get(), pos, len);

         for (auto i = pos; i < pos + len; i++)
         {
            rmsSum -= rmsWindow[rmsPos];
            // i - pos is bounded by len:
            auto index = ( i - pos ).as_size_t();
            rmsWindow[rmsPos] = buf[ index ] * buf[ index ];
            rmsSum += rmsWindow[rmsPos];
            rmsPos = (rmsPos + 1) % kRMSWindowSize;

            bool thresholdExceeded = rmsSum > threshold;

            if (thresholdExceeded)
            {
               // everytime the threshold is exceeded, reset our count for
               // the number of pause samples
               curSamplesPause = 0;

               if (!inDuckRegion)
               {
                  // the threshold has been exceeded for the first time, so
                  // let the duck region begin here
                  inDuckRegion = true;
                  duckRegionStart = mControlTrack->LongSamplesToTime(i);
               }
            }

            if (!thresholdExceeded && inDuckRegion)
            {
               // the threshold has not been exceeded and we are in a duck
               // region, but only fade in if the maximum pause has been
               // exceeded
               curSamplesPause += 1;

               if (curSamplesPause >= minSamplesPause)
               {
                  // do the actual duck fade and reset all values
                  double duckRegionEnd =
                     mControlTrack->LongSamplesToTime(i - curSamplesPause);

                  regions.push_back(AutoDuckRegion(
                     duckRegionStart - mOuterFadeDownLen,
                     duckRegionEnd + mOuterFadeUpLen));

                  inDuckRegion = false;
               }
            }
         }

         pos += len;

         if (TotalProgress(
            (pos - start).as_double() /
            (end - start).as_double() /
            (GetNumWaveTracks() + 1)
         ))
         {
            cancel = true;
            break;
         }
      }

      // apply last duck fade, if any
      if (inDuckRegion)
      {
         double duckRegionEnd =
            mControlTrack->LongSamplesToTime(end - curSamplesPause);
         regions.push_back(AutoDuckRegion(
            duckRegionStart - mOuterFadeDownLen,
            duckRegionEnd + mOuterFadeUpLen));
      }
   }

   if (!cancel)
   {
      CopyInputTracks(); // Set up mOutputTracks.

      int trackNum = 0;

      for( auto iterTrack : mOutputTracks->Selected< WaveTrack >() )
      {
         for (size_t i = 0; i < regions.size(); i++)
         {
            const AutoDuckRegion& region = regions[i];
            if (ApplyDuckFade(trackNum, iterTrack, region.t0, region.t1))
            {
               cancel = true;
               break;
            }
         }

         if (cancel)
            break;

         trackNum++;
      }
   }

   ReplaceProcessedTracks(!cancel);
   return !cancel;
}

void EffectAutoDuck::PopulateOrExchange(ShuttleGui & S)
{
   S.SetBorder(5);
   S.StartVerticalLay(true);
   {
      S.AddSpace(0, 5);

      mPanel = safenew EffectAutoDuckPanel(S.GetParent(), wxID_ANY, this);
      S.AddWindow(mPanel);

      S.AddSpace(0, 5);

      S.StartMultiColumn(6, wxCENTER);
      {
         mDuckAmountDbBox = S.Validator<FloatingPointValidator<double>>(
               1, &mDuckAmountDb, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_DuckAmountDb, MAX_DuckAmountDb
            )
            .NameSuffix(XO("db"))
            .AddTextBox(XXO("Duck &amount:"), wxT(""), 10);
         S.AddUnits(XO("dB"));

         mMaximumPauseBox = S.Validator<FloatingPointValidator<double>>(
               2, &mMaximumPause, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_MaximumPause, MAX_MaximumPause
            )
            .NameSuffix(XO("seconds"))
            .AddTextBox(XXO("Ma&ximum pause:"), wxT(""), 10);
         S.AddUnits(XO("seconds"));

         mOuterFadeDownLenBox = S.Validator<FloatingPointValidator<double>>(
               2, &mOuterFadeDownLen, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_OuterFadeDownLen, MAX_OuterFadeDownLen
            )
            .NameSuffix(XO("seconds"))
            .AddTextBox(XXO("Outer fade &down length:"), wxT(""), 10);
         S.AddUnits(XO("seconds"));

         mOuterFadeUpLenBox = S.Validator<FloatingPointValidator<double>>(
               2, &mOuterFadeUpLen, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_OuterFadeUpLen, MAX_OuterFadeUpLen
            )
            .NameSuffix(XO("seconds"))
            .AddTextBox(XXO("Outer fade &up length:"), wxT(""), 10);
         S.AddUnits(XO("seconds"));

         mInnerFadeDownLenBox = S.Validator<FloatingPointValidator<double>>(
               2, &mInnerFadeDownLen, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_InnerFadeDownLen, MAX_InnerFadeDownLen
            )
            .NameSuffix(XO("seconds"))
            .AddTextBox(XXO("Inner fade d&own length:"), wxT(""), 10);
         S.AddUnits(XO("seconds"));

         mInnerFadeUpLenBox = S.Validator<FloatingPointValidator<double>>(
               2, &mInnerFadeUpLen, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_InnerFadeUpLen, MAX_InnerFadeUpLen
            )
            .NameSuffix(XO("seconds"))
            .AddTextBox(XXO("Inner &fade up length:"), wxT(""), 10);
         S.AddUnits(XO("seconds"));
      }
      S.EndMultiColumn();

      S.StartMultiColumn(3, wxCENTER);
      {
         mThresholdDbBox = S.Validator<FloatingPointValidator<double>>(
               2, &mThresholdDb, NumValidatorStyle::NO_TRAILING_ZEROES,
               MIN_ThresholdDb, MAX_ThresholdDb
            )
            .NameSuffix(XO("db"))
            .AddTextBox(XXO("&Threshold:"), wxT(""), 10);
         S.AddUnits(XO("dB"));
      }
      S.EndMultiColumn();

   }
   S.EndVerticalLay();

   return;
}

bool EffectAutoDuck::TransferDataToWindow()
{
   if (!mUIParent->TransferDataToWindow())
   {
      return false;
   }

   mPanel->Refresh(false);

   return true;
}

bool EffectAutoDuck::TransferDataFromWindow()
{
   if (!mUIParent->Validate() || !mUIParent->TransferDataFromWindow())
   {
      return false;
   }

   return true;
}

// EffectAutoDuck implementation

// this currently does an exponential fade
bool EffectAutoDuck::ApplyDuckFade(int trackNum, WaveTrack* t,
                                   double t0, double t1)
{
   bool cancel = false;

   auto start = t->TimeToLongSamples(t0);
   auto end = t->TimeToLongSamples(t1);

   Floats buf{ kBufSize };
   auto pos = start;

   auto fadeDownSamples = t->TimeToLongSamples(
      mOuterFadeDownLen + mInnerFadeDownLen);
   if (fadeDownSamples < 1)
      fadeDownSamples = 1;

   auto fadeUpSamples = t->TimeToLongSamples(
      mOuterFadeUpLen + mInnerFadeUpLen);
   if (fadeUpSamples < 1)
      fadeUpSamples = 1;

   float fadeDownStep = mDuckAmountDb / fadeDownSamples.as_double();
   float fadeUpStep = mDuckAmountDb / fadeUpSamples.as_double();

   while (pos < end)
   {
      const auto len = limitSampleBufferSize( kBufSize, end - pos );

      t->GetFloats(buf.get(), pos, len);

      for (auto i = pos; i < pos + len; i++)
      {
         float gainDown = fadeDownStep * (i - start).as_float();
         float gainUp = fadeUpStep * (end - i).as_float();

         float gain;
         if (gainDown > gainUp)
            gain = gainDown;
         else
            gain = gainUp;
         if (gain < mDuckAmountDb)
            gain = mDuckAmountDb;

         // i - pos is bounded by len:
         buf[ ( i - pos ).as_size_t() ] *= DB_TO_LINEAR(gain);
      }

      t->Set((samplePtr)buf.get(), floatSample, pos, len);

      pos += len;

      float curTime = t->LongSamplesToTime(pos);
      float fractionFinished = (curTime - mT0) / (mT1 - mT0);
      if (TotalProgress( (trackNum + 1 + fractionFinished) /
                         (GetNumWaveTracks() + 1) ))
      {
         cancel = true;
         break;
      }
   }

   return cancel;
}

void EffectAutoDuck::OnValueChanged(wxCommandEvent & WXUNUSED(evt))
{
   mPanel->Refresh(false);
}

/*
 * EffectAutoDuckPanel implementation
 */

#define CONTROL_POINT_REGION 10 // pixel distance to click on a control point
#define CONTROL_POINT_MIN_MOVE 5 // min mouse move until value is changed

#define TEXT_DISTANCE 15 // pixel distance text <-> center of control point

#define FADE_DOWN_START 150 // x coordinate
#define FADE_UP_START 450 // x coordinate
#define DUCK_AMOUNT_START 50 // y coordinate

#define FADE_SCALE 40 // scale factor for second -> pixel conversion
#define DUCK_AMOUNT_SCALE 8 // scale factor for db -> pixel conversion

static int GetDistance(const wxPoint& first, const wxPoint& second)
{
   int distanceX = abs(first.x - second.x);
   int distanceY = abs(first.y - second.y);
   if (distanceX > distanceY)
      return distanceX;
   else
      return distanceY;
}

BEGIN_EVENT_TABLE(EffectAutoDuckPanel, wxPanelWrapper)
   EVT_PAINT(EffectAutoDuckPanel::OnPaint)
   EVT_MOUSE_CAPTURE_CHANGED(EffectAutoDuckPanel::OnMouseCaptureChanged)
   EVT_MOUSE_CAPTURE_LOST(EffectAutoDuckPanel::OnMouseCaptureLost)
   EVT_LEFT_DOWN(EffectAutoDuckPanel::OnLeftDown)
   EVT_LEFT_UP(EffectAutoDuckPanel::OnLeftUp)
   EVT_MOTION(EffectAutoDuckPanel::OnMotion)
END_EVENT_TABLE()

EffectAutoDuckPanel::EffectAutoDuckPanel(
   wxWindow *parent, wxWindowID winid, EffectAutoDuck *effect)
:  wxPanelWrapper(parent, winid, wxDefaultPosition, wxSize(600, 300))
{
   mParent = parent;
   mEffect = effect;
   mCurrentControlPoint = none;
   mBackgroundBitmap = NULL;

   ResetControlPoints();
}

EffectAutoDuckPanel::~EffectAutoDuckPanel()
{
   if(HasCapture())
      ReleaseMouse();
}

void EffectAutoDuckPanel::ResetControlPoints()
{
   mControlPoints[innerFadeDown] = wxPoint(-100,-100);
   mControlPoints[innerFadeUp] = wxPoint(-100,-100);
   mControlPoints[outerFadeDown] = wxPoint(-100,-100);
   mControlPoints[outerFadeUp] = wxPoint(-100,-100);
   mControlPoints[duckAmount] = wxPoint(-100,-100);
}

void EffectAutoDuckPanel::OnPaint(wxPaintEvent & WXUNUSED(evt))
{
   int clientWidth, clientHeight;
   GetSize(&clientWidth, &clientHeight);

   if (!mBackgroundBitmap || mBackgroundBitmap->GetWidth() != clientWidth ||
       mBackgroundBitmap->GetHeight() != clientHeight)
   {
      mBackgroundBitmap = std::make_unique<wxBitmap>(clientWidth, clientHeight,24);
   }

   wxMemoryDC dc;
   dc.SelectObject(*mBackgroundBitmap);

   dc.SetBrush(*wxWHITE_BRUSH);
   dc.SetPen(*wxBLACK_PEN);
   dc.DrawRectangle(0, 0, clientWidth, clientHeight);

   dc.SetFont(wxFont(10, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL,
                     wxFONTWEIGHT_NORMAL));
   dc.SetTextForeground(*wxBLACK);
   dc.SetTextBackground(*wxWHITE);

   double duckAmountDb = 0;
   double innerFadeDownLen = 0;
   double innerFadeUpLen = 0;
   double outerFadeDownLen = 0;
   double outerFadeUpLen = 0;
   mEffect->mDuckAmountDbBox->GetValue().ToDouble(&duckAmountDb);
   mEffect->mInnerFadeDownLenBox->GetValue().ToDouble(&innerFadeDownLen);
   mEffect->mInnerFadeUpLenBox->GetValue().ToDouble(&innerFadeUpLen);
   mEffect->mOuterFadeDownLenBox->GetValue().ToDouble(&outerFadeDownLen);
   mEffect->mOuterFadeUpLenBox->GetValue().ToDouble(&outerFadeUpLen);

   if (innerFadeDownLen < MIN_InnerFadeDownLen || innerFadeDownLen > MAX_InnerFadeDownLen ||
       innerFadeUpLen < MIN_InnerFadeUpLen     || innerFadeUpLen > MAX_InnerFadeUpLen     ||
       outerFadeDownLen < MIN_OuterFadeDownLen || outerFadeDownLen > MAX_OuterFadeDownLen ||
       outerFadeUpLen < MIN_OuterFadeUpLen     || outerFadeUpLen > MAX_OuterFadeUpLen     ||
       duckAmountDb < MIN_DuckAmountDb         || duckAmountDb > MAX_DuckAmountDb)
   {
      // values are out of range, no preview available
      wxString message = _("Preview not available");
      int textWidth = 0, textHeight = 0;
      dc.GetTextExtent(message, &textWidth, &textHeight);
      dc.DrawText(message, (clientWidth - textWidth) / 2,
                           (clientHeight - textHeight) / 2);

      ResetControlPoints();
   } else
   {
      // draw preview
      dc.SetBrush(*wxTRANSPARENT_BRUSH);
      dc.SetPen(wxPen(theTheme.Colour(clrGraphLines), 3, wxPENSTYLE_SOLID));

      wxPoint points[6];

      points[0].x = 10;
      points[0].y = DUCK_AMOUNT_START;

      points[1].x = FADE_DOWN_START - (int)(outerFadeDownLen * FADE_SCALE);
      points[1].y = DUCK_AMOUNT_START;

      points[2].x = FADE_DOWN_START + (int)(innerFadeDownLen * FADE_SCALE);
      points[2].y = DUCK_AMOUNT_START -
         (int)(duckAmountDb * DUCK_AMOUNT_SCALE);

      points[3].x = FADE_UP_START - (int)(innerFadeUpLen * FADE_SCALE);
      points[3].y = DUCK_AMOUNT_START -
         (int)(duckAmountDb * DUCK_AMOUNT_SCALE);

      points[4].x = FADE_UP_START + (int)(outerFadeUpLen * FADE_SCALE);
      points[4].y = DUCK_AMOUNT_START;

      points[5].x = clientWidth - 10;
      points[5].y = DUCK_AMOUNT_START;

      AColor::Lines(dc, 6, points);

      dc.SetPen(wxPen(*wxBLACK, 1, wxPENSTYLE_DOT));

      AColor::Line(dc, FADE_DOWN_START, 10, FADE_DOWN_START, clientHeight - 10);
      AColor::Line(dc, FADE_UP_START, 10, FADE_UP_START, clientHeight - 10);

      dc.SetPen(AColor::envelopePen);
      dc.SetBrush(*wxWHITE_BRUSH);

      mControlPoints[outerFadeDown] = points[1];
      mControlPoints[innerFadeDown] = points[2];
      mControlPoints[innerFadeUp] = points[3];
      mControlPoints[outerFadeUp] = points[4];
      mControlPoints[duckAmount] = wxPoint(
         (points[2].x + points[3].x) / 2, points[2].y);

      for (int i = 0; i < AUTO_DUCK_PANEL_NUM_CONTROL_POINTS; i++)
      {
         EControlPoint cp = (EControlPoint)i;
         int digits;
         float value;

         if (cp == innerFadeDown)
         {
            value = innerFadeDownLen;
            digits = 2;
         }
         else if (cp == innerFadeUp)
         {
            value = innerFadeUpLen;
            digits = 2;
         }
         else if (cp == outerFadeDown)
         {
            value = outerFadeDownLen;
            digits = 2;
         } else if (cp == outerFadeUp)
         {
            value = outerFadeUpLen;
            digits = 2;
         }
         else
         {
            value = duckAmountDb;
            digits = 1;
         }

         wxString valueStr = Internat::ToDisplayString(value, digits);
         valueStr += wxT(" ");

         if (cp == duckAmount)
            /* i18n-hint: short form of 'decibels'.*/
            valueStr += _("dB");
         else
            /* i18n-hint: short form of 'seconds'.*/
            valueStr += _("s");

         int textWidth = 0, textHeight = 0;
         GetTextExtent(valueStr, &textWidth, &textHeight);

         int textPosX = mControlPoints[i].x - textWidth / 2;
         int textPosY = mControlPoints[i].y;

         if (cp == duckAmount || cp == outerFadeDown || cp == outerFadeUp)
            textPosY -= TEXT_DISTANCE + textHeight;
         else
            textPosY += TEXT_DISTANCE;

         dc.DrawText(valueStr, textPosX, textPosY);

         dc.DrawEllipse(mControlPoints[i].x - 3,
                        mControlPoints[i].y - 3, 6, 6);
      }
   }

   // copy background buffer to paint dc
   wxPaintDC paintDC(this);
   paintDC.Blit(0, 0, clientWidth, clientHeight, &dc, 0, 0);

   // clean up: necessary to free resources on Windows
   dc.SetPen(wxNullPen);
   dc.SetBrush(wxNullBrush);
   dc.SetFont(wxNullFont);
   dc.SelectObject(wxNullBitmap);
}

void EffectAutoDuckPanel::OnMouseCaptureChanged(
   wxMouseCaptureChangedEvent & WXUNUSED(evt))
{
   SetCursor(wxNullCursor);
   mCurrentControlPoint = none;
}

void EffectAutoDuckPanel::OnMouseCaptureLost(
   wxMouseCaptureLostEvent & WXUNUSED(evt))
{
   mCurrentControlPoint = none;

   if (HasCapture())
   {
      ReleaseMouse();
   }
}

EffectAutoDuckPanel::EControlPoint
   EffectAutoDuckPanel::GetNearestControlPoint(const wxPoint & pt)
{
   int dist[AUTO_DUCK_PANEL_NUM_CONTROL_POINTS];
   int i;

   for (i = 0; i < AUTO_DUCK_PANEL_NUM_CONTROL_POINTS; i++)
      dist[i] = GetDistance(pt, mControlPoints[i]);

   int curMinimum = 0;
   for (i = 0; i < AUTO_DUCK_PANEL_NUM_CONTROL_POINTS; i++)
      if (dist[i] < dist[curMinimum])
         curMinimum = i;

   if (dist[curMinimum] <= CONTROL_POINT_REGION)
      return (EControlPoint)curMinimum;
   else
      return none;
}

void EffectAutoDuckPanel::OnLeftDown(wxMouseEvent & evt)
{
   EControlPoint nearest = GetNearestControlPoint(evt.GetPosition());

   if (nearest != none)
   {
      // this control point has been clicked
      mMouseDownPoint = evt.GetPosition();

      mCurrentControlPoint = nearest;
      mControlPointMoveActivated = false;

      for (int i = 0; i < AUTO_DUCK_PANEL_NUM_CONTROL_POINTS; i++)
         mMoveStartControlPoints[i] = mControlPoints[i];

      if( !HasCapture() )
         CaptureMouse();
   }
}

void EffectAutoDuckPanel::OnLeftUp(wxMouseEvent & WXUNUSED(evt))
{
   if (mCurrentControlPoint != none)
   {
      mCurrentControlPoint = none;
      ReleaseMouse();
   }
}

void EffectAutoDuckPanel::OnMotion(wxMouseEvent & evt)
{
   switch (GetNearestControlPoint(evt.GetPosition()))
   {
   case none:
      SetCursor(wxNullCursor);
      break;
   case innerFadeDown:
   case innerFadeUp:
   case outerFadeDown:
   case outerFadeUp:
      SetCursor(wxCursor(wxCURSOR_SIZEWE));
      break;
   case duckAmount:
      SetCursor(wxCursor(wxCURSOR_SIZENS));
      break;
   }

   if (mCurrentControlPoint != none)
   {
      if (!mControlPointMoveActivated)
      {
         int dist;

         if (mCurrentControlPoint == duckAmount)
            dist = abs(evt.GetY() - mMouseDownPoint.y);
         else
            dist = abs(evt.GetX() - mMouseDownPoint.x);

         if (dist >= CONTROL_POINT_MIN_MOVE)
            mControlPointMoveActivated = true;
      }

      if (mControlPointMoveActivated)
      {
         float newValue;

         switch (mCurrentControlPoint)
         {
         case outerFadeDown:
            newValue = ((double)(FADE_DOWN_START - evt.GetX())) / FADE_SCALE;
            mEffect->mOuterFadeDownLen = TrapDouble(newValue, MIN_OuterFadeDownLen, MAX_OuterFadeDownLen);
            break;
         case outerFadeUp:
            newValue = ((double)(evt.GetX() - FADE_UP_START)) / FADE_SCALE;
            mEffect->mOuterFadeUpLen = TrapDouble(newValue, MIN_OuterFadeUpLen, MAX_OuterFadeUpLen);
            break;
         case innerFadeDown:
            newValue = ((double)(evt.GetX() - FADE_DOWN_START)) / FADE_SCALE;
            mEffect->mInnerFadeDownLen = TrapDouble(newValue, MIN_InnerFadeDownLen, MAX_InnerFadeDownLen);
            break;
         case innerFadeUp:
            newValue = ((double)(FADE_UP_START - evt.GetX())) / FADE_SCALE;
            mEffect->mInnerFadeUpLen = TrapDouble(newValue, MIN_InnerFadeUpLen, MAX_InnerFadeUpLen);
            break;
         case duckAmount:
            newValue = ((double)(DUCK_AMOUNT_START - evt.GetY())) / DUCK_AMOUNT_SCALE;
            mEffect->mDuckAmountDb = TrapDouble(newValue, MIN_DuckAmountDb, MAX_DuckAmountDb);
            break;
         case none:
            wxASSERT(false); // should not happen
         }
         mEffect->TransferDataToWindow();
         Refresh(false);
      }
   }
}