Br3tt

/*
===========================================================================================================
Lyriks 1.2 (build 20101023.1300) - a WSH lyrics module by Br3tt
- This WSH script get lyrics from TAG first then from local file in Music folder then in foobar2000\lyrics\ and finally it displays them (scrolling+sync)
- It handles TXT and LRC format (sync handled), but not the LRC Enhanced format (translated to simple LRC format)
- exotics timestamps are now handled (like [9:99], [99:99.999], [9:99.999], [99:99:999] ...)
- filenames supported are : <%artist%> -<%title%>.lrc (or .txt)  AND <%artist%> - <%title%>.lrc (or .txt)
- Comments, Blank lines (no timestamp) and Info lines (ar:, ti, ...) are ignored.
- Manual Scrolling possible with the mousewheel (double click on the panel to re-center on the active line)
- Requirements :
  1) foobar2000
  2) WSH Panel Mod component
  3) this script!
  4) Optional: a lyrics grabber (i.e: Lyric Show Panel by hidding the panel, foo_lyricsDB, ...)
- Some settings are available by using the panel Properties (right click on WSH panel -> Properties)
- This script don't make any changes to your files and write nothing on your system, except the creation of the folder foobar2000/lyrics if not found
===========================================================================================================
*/

// Text formatting function
// {{
function StringFormat() {
    var h_align = 0, v_align = 0, trimming = 0, flags = 0;
    switch (arguments.length)
    {
        // fall-thru
        case 4:
            flags = arguments[3];
        case 3:
            trimming = arguments[2];
        case 2:
            v_align = arguments[1];
        case 1:
            h_align = arguments[0];
            break;
        default:
            return 0;
    }
    return ((h_align << 28) | (v_align << 24) | (trimming << 20) | flags);
}
StringAlignment = {
    Near: 0,
    Centre: 1,
    Far: 2
};
var lt_stringformat = StringFormat(StringAlignment.Near, StringAlignment.Near);
var ct_stringformat = StringFormat(StringAlignment.Centre, StringAlignment.Near);
var rt_stringformat = StringFormat(StringAlignment.Far, StringAlignment.Near);
var lc_stringformat = StringFormat(StringAlignment.Near, StringAlignment.Centre);
var cc_stringformat = StringFormat(StringAlignment.Centre, StringAlignment.Centre);
var rc_stringformat = StringFormat(StringAlignment.Far, StringAlignment.Centre);
var lb_stringformat = StringFormat(StringAlignment.Near, StringAlignment.Far);
var cb_stringformat = StringFormat(StringAlignment.Centre, StringAlignment.Far);
var rb_stringformat = StringFormat(StringAlignment.Far, StringAlignment.Far);
// }}

// Use with GdiDrawText()
// {{
var DT_LEFT = 0x00000000;
var DT_RIGHT = 0x00000002;
var DT_TOP = 0x00000000;
var DT_CENTER = 0x00000001;
var DT_VCENTER = 0x00000004;
var DT_WORDBREAK = 0x00000010;
var DT_CALCRECT = 0x00000400;
var DT_NOPREFIX = 0x00000800;
var DT_END_ELLIPSIS = 0x00008000;
// }}

//{{
// IO Mode
var ForReading = 1;
var ForWriting = 2;
var ForAppending = 8;
//}}

//{{
// Paths
var lyrics_dir1 = fb.Titleformat("$replace($replace(%path%,%filename_ext%,),\,\\)");
var lyrics_dir2 =  fb.FoobarPath + "lyrics\\";
//}}

//{{
// new objects
sentence = function () {
    this.timer = 0;
    this.text = "";
    this.total_lines = 0;
    this.ante_lines = 0;
}
//}}

function RGBA(r, g, b, a) {
    return ((a << 24) | (r << 16) | (g << 8) | (b));
}

// ================================================/ TF
var len = fb.Titleformat("%length%");
var elap = fb.TitleFormat("%playback_time%");
var remain = fb.TitleFormat("%playback_time_remaining%");
var len_seconds = fb.Titleformat("%length_seconds%");
var elap_seconds = fb.TitleFormat("%playback_time_seconds%");
var remain_seconds = fb.Titleformat("%playback_time_remaining_seconds%");
var artist = fb.Titleformat("$replace(%artist%,'/','_')");
var title = fb.Titleformat("%title%");
var lyrics = fb.TitleFormat("[$if2(%LYRICS%,$if2(%LYRIC%,$if2(%UNSYNCED LYRICS%,%UNSYNCED LYRIC%)))]");

// ================================================/ Declarations
var g_font = gdi.Font("segoe ui", 12, 0);
var g_playtimer;
var g_metadb;
var ww = 0, wh = 0;

var PLAYTIMER_VALUE = window.GetProperty("Timer value in ms [10;100]", 10);
var LINE_HEIGHT = window.GetProperty("Line height [20;30]", 24);
var TEXT_SHADOW = window.GetProperty("Text shadow (true/false)", true);
var PLAIN_COLOR_BG = window.GetProperty("Plain colour background (true/false)", false);
var DITHER = window.GetProperty("Top & Botom dither (true/false)", true);
var H_PADDING = window.GetProperty("Horizontal padding [0;20]", 20);
var TXT_ALIGN = window.GetProperty("Text alignment (left/center/right)", "center");
var LIGHT_BG = window.GetProperty("Light background", true);
var DEBUG = false;
var DEFAULT_OFFSET = 29;

var g_fso = new ActiveXObject("Scripting.FileSystemObject");
var g_file = null;
var g_tab = Array();
var g_scroll=0;
var g_lyrics_path;
var g_lyrics_filename;
var g_lyrics_status;
var focus=0;
var focus_next=0;
var g_plainbg_colour;
var g_ovbg_normalcolour;
var g_ovbg_lineseparatorcolour;
var g_ovbg_highlightcolour;
var g_txt_normalcolour;
var g_txt_highlightcolour;
var g_txt_shadowcolour;
var centiemes = 0;
var g_is_scrolling = false;
var g_multi_balise = false;
var g_balise_total;
var g_balise_char_offset = 10;
var g_tab_length;
var g_txt_align;

var midpoint;
var pos;

// START
function on_size() {
    var k;
    ww = window.Width;
    wh = window.Height;
    g_metadb = fb.IsPlaying ? fb.GetNowPlaying() : false;

    // exit test on useless calls made (wsh tweak)
    if(!ww && !wh) return true;

    midpoint = wh / 2 - LINE_HEIGHT / 2;

    // colour definitions
    g_plainbg_colour = RGBA(140, 200, 250, 255);
    g_ovbg_normalcolour = RGBA(000, 000, 000, 130);
    g_ovbg_lineseparatorcolour = RGBA(000, 000, 000, 100);
    g_ovbg_highlightcolour = RGBA(020, 100, 240, 130);
    g_txt_normalcolour = RGBA(200, 200, 210, 255);
    g_txt_highlightcolour = RGBA(255, 255, 255, 255);
    g_txt_shadowcolour = RGBA(000, 000, 000, 150);

    g_playtimer && window.KillTimer(g_playtimer);

    if(fb.IsPlaying||fb.IsPaused) {
        g_scroll=0;
        g_is_scrolling = false;
        get_lyrics();
        change_focus();
        k = g_tab[focus].ante_lines * LINE_HEIGHT;
        if(g_lyrics_status>0) {
            pos = midpoint - k;
            g_playtimer = window.CreateTimerInterval(PLAYTIMER_VALUE);
        } else {
            delta = (g_tab[g_tab.length-1].ante_lines + g_tab[g_tab.length-1].total_lines);
            pos = (wh / 2) - (delta * LINE_HEIGHT / 2);
        }
    }
}

function on_paint(gr) {
    PLAIN_COLOR_BG && gr.FillSolidRect(0, 0, ww, wh, g_plainbg_colour);
    if(fb.IsPlaying||fb.IsPaused) {
        show_lyrics(gr, g_tab, pos);
        DEBUG && gr.GdiDrawText(g_lyrics_status.toString(), g_font, g_normalcolour, 5, 5, ww, LINE_HEIGHT, DT_TOP | DT_LEFT | DT_WORDBREAK | DT_CALCRECT | DT_NOPREFIX);
    }
    DITHER && gr.FillGradRect(0, 0, ww, 11, 90, g_txt_shadowcolour, RGBA(0,0,0,0));
    DITHER && gr.FillGradRect(0, wh-11, ww, 11, 270, g_txt_shadowcolour, RGBA(0,0,0,0));
    DITHER && gr.FillGradRect(0, 0, ww, 1, 90, g_txt_shadowcolour, RGBA(0,0,0,0));
    DITHER && gr.FillGradRect(0, wh-2, ww, 1, 90, RGBA(0,0,0,0), g_txt_shadowcolour);
}

function on_mouse_lbtn_dblclk(x, y, mask) {
    on_size();
}

function on_mouse_leave() {
    window.Repaint();
}

function on_playback_time(time) {
    // at each new seconde, centiemes is reset to 0 (Increment on timer every 100ms)
    centiemes = 0;
    if(g_lyrics_status==0) {
        if(elap_seconds.Eval()==3) {
            on_size();
        }
        window.Repaint();
    }
}

function on_playback_new_track(info) {
    g_metadb = fb.IsPlaying ? fb.GetNowPlaying() : false;
    g_playtimer && window.KillTimer(g_playtimer);
    pos=0;
    g_scroll = 0;
    g_is_scrolling = false;
    get_lyrics();
    change_focus();
    if(g_lyrics_status>0) {
        g_playtimer = window.CreateTimerInterval(PLAYTIMER_VALUE);
    }
}

function on_playback_seek(time) {
    var k;
    if(g_lyrics_status>0) {
        g_scroll = 0;
        g_is_scrolling = false;
        change_focus();
        k = g_tab[focus].ante_lines * LINE_HEIGHT;
        pos = midpoint - k;
        window.Repaint();
    }
}

function on_playback_stop(reason) {
    g_metadb = fb.IsPlaying ? fb.GetNowPlaying() : false;
    g_playtimer && window.KillTimer(g_playtimer);
	if(reason==0) {
        // Stop
        window.Repaint();
	}
}

function on_mouse_wheel(delta) {
    if(g_lyrics_status>0) {
        if(delta>0) {
            pos = (pos>=midpoint)?pos:pos + LINE_HEIGHT;
        } else {
            pos = (pos<=(wh/2 - g_tab_length*LINE_HEIGHT))?pos:pos - LINE_HEIGHT;
        }
        window.Repaint();
    }
}

function on_timer(id) {
    var t1 = elap_seconds.Eval() * 100 + centiemes;
    var t2 = len_seconds.Eval() * 100;
    var p1, p2;
    if(t1>t2-100) {
        g_playtimer && window.KillTimer(g_playtimer);
    }
    if(g_playtimer) {
        if(g_playtimer.ID == id) {
            if(!g_is_scrolling && t1>=g_tab[focus_next].timer) {
                p1 = g_tab[focus].ante_lines*LINE_HEIGHT;
                p2 = g_tab[focus_next].ante_lines*LINE_HEIGHT;
                g_scroll = p2 - p1;
                change_focus();
                g_is_scrolling = true;
            }
            if (g_scroll>0) {
                pos -= 1;
                g_scroll -= 1;
                window.Repaint();
            } else {
                g_is_scrolling = false;
            }
            centiemes = (centiemes>98)?0:(centiemes+1);
        }
    }
}

function show_lyrics(gr, tab, posy) {
    var i, k, text_colour;
    gr.SetTextRenderingHint(5);
    // decoding text alignment (from Properties)
    switch(TXT_ALIGN.toUpperCase()) {
        case "LEFT":
            g_txt_align = lc_stringformat;
            break;
        case "CENTER":
            g_txt_align = cc_stringformat;
            break;
        case "RIGHT":
            g_txt_align = rc_stringformat;
            break;
        default:
            g_txt_align = cc_stringformat;
    }
    if(g_lyrics_status>0) {
        if(posy>=0) {
            LIGHT_BG && gr.FillSolidRect(0, Math.floor(posy - wh/2), ww, Math.floor(wh/2), g_ovbg_normalcolour);
        }
    } else {
        LIGHT_BG && gr.FillSolidRect(0, 0, ww, wh, g_ovbg_normalcolour);
    }
    for(i=0;i<tab.length;i++) {
        if(Math.round(posy)>=(LINE_HEIGHT*-4) && Math.round(posy)<wh) {
            if(i==focus && g_lyrics_status==1) {
                text_colour = g_txt_highlightcolour;
            } else {
                if(g_lyrics_status==0) {
                    text_colour = g_txt_highlightcolour;
                } else {
                    text_colour = g_txt_normalcolour;
                }
            }
            if(g_lyrics_status>0) {
                if(!LIGHT_BG && i==focus && tab[i].text.length>1 && g_lyrics_status==1) {
                    gr.FillSolidRect(0, Math.floor(posy), ww, (tab[i].total_lines*LINE_HEIGHT), g_ovbg_highlightcolour);
                } else {
                    LIGHT_BG && gr.FillSolidRect(0, Math.floor(posy), ww, (tab[i].total_lines*LINE_HEIGHT-1), (i==focus && tab[i].text.length>1 && g_lyrics_status==1)?g_ovbg_highlightcolour:g_ovbg_normalcolour);
                    //LIGHT_BG && gr.FillSolidRect(0, Math.floor(posy+(tab[i].total_lines*LINE_HEIGHT-1)), ww, 1, g_ovbg_lineseparatorcolour);
                }
            }
            TEXT_SHADOW && gr.DrawString(tab[i].text, g_font, g_txt_shadowcolour, 1+H_PADDING, Math.floor(posy)-1, ww-H_PADDING*2, (tab[i].total_lines*LINE_HEIGHT), g_txt_align);
            TEXT_SHADOW && gr.DrawString(tab[i].text, g_font, g_txt_shadowcolour, 1+H_PADDING, Math.floor(posy), ww-H_PADDING*2, (tab[i].total_lines*LINE_HEIGHT), g_txt_align);
            gr.DrawString(tab[i].text, g_font, text_colour, 0+H_PADDING, Math.floor(posy)-1, ww-H_PADDING*2, (tab[i].total_lines*LINE_HEIGHT), g_txt_align);
        }
        posy = Math.floor(posy+LINE_HEIGHT+((tab[i].total_lines-1)*LINE_HEIGHT));
    }
    if(g_lyrics_status>0 && posy<=wh) {
        LIGHT_BG && gr.FillSolidRect(0, Math.floor(posy), ww, Math.floor(wh), g_ovbg_normalcolour);
    }
}

function grab_timer(t_tab) {
    var tminutes, tsecondes, tcentiemes;
    var i, k, f_sentence, b, c, delta, repeat_text;
    var tab = Array();
    for(i=0;i<t_tab.length;i++) {
        if(g_lyrics_status==1) {
            // -----------
            // sync lyrics
            // -----------
            if(IsTimestamped(t_tab[i])) {
                b = 0;
                while(t_tab[i].substring(b*10, b*10+1)=="[") {
                    b++;
                }
                c = b;
                repeat_text = remove_enhanced_balises(t_tab[i].substring(c*10, t_tab[i].length));
                if(repeat_text.length==0) repeat_text = repeat_text + " ";
                for(b=0;b<c;b++) {
                    f_sentence = new sentence;
                    tminutes = t_tab[i].substring(1+(b*10), 3+(b*10));
                    tsecondes = t_tab[i].substring(4+(b*10), 6+(b*10));
                    tcentiemes = t_tab[i].substring(7+(b*10), 9+(b*10));
                    f_sentence.timer = Math.round(tminutes)*60*100 + Math.round(tsecondes)*100 + Math.round(tcentiemes) - DEFAULT_OFFSET;
                    if(f_sentence.timer<0) f_sentence.timer=0;
                    f_sentence.text = repeat_text;
                    tab.push(f_sentence);
                }
            }
        } else {
            // -------------
            // unsync lyrics
            // -------------
            if(IsTimestamped(t_tab[i])) {
                // if sync line in unsync lyrics, i remove timestamps in this line
                b = 0;
                while(IsTimestamped(t_tab[i].substring(b*10, b*10+10))) {
                    b++;
                }
                t_tab[i] = t_tab[i].substring(b*10, t_tab[i].length);
            }
            f_sentence = new sentence;
            f_sentence.timer = 0;
            f_sentence.text = t_tab[i];
            tab.push(f_sentence);
        }
    }
    if(tab.length==0) {
        g_lyrics_status = 0;
        tab = load_track_info();
        delta = (tab[tab.length-1].ante_lines + tab[tab.length-1].total_lines);
        pos = (wh / 2) - (delta * LINE_HEIGHT / 2);
    } else {
        f_sentence = new sentence;
        f_sentence.timer = 9999999;
        f_sentence.text = "---";
        tab.push(f_sentence);
    }
    CollectGarbage();
    return calc_lines(sort_tab(tab));
}

function load_file(filePath, fileName) {
    var i;
    var t_tab = Array();
    var str;
    g_file = open_file(filePath, fileName, ForReading);
    while(!g_file.AtEndOfStream) {
        str = g_file.ReadLine();
        // blank lines are ignored
        if(str.length>0) t_tab.push(str);
    }
    close_file(g_file);
    return grab_timer(check_lyrics_type(t_tab));
}

function check_lyrics_type(t_tab) {
    var i;
    var count = 0;
    var ts_percent;
    var tab = Array();
    for(i=0;i<t_tab.length;i++) {
        if(IsTimestamped(t_tab[i])) {
            // format timestamps to default syntax : [99:99.99]
            tab.push(ts_analyzer(t_tab[i]));
            // count # of sync lines
            count++;
        } else {
            if(t_tab[i].length>0) tab.push(t_tab[i]);
        }
    }
    // calc percent of sync lines, if more than 50% of the total filled lines, it's sync lyrics, else, unsync lyrics!
    ts_percent = Math.round(count/tab.length*100);
    if(ts_percent>50) {
        // sync lyrics
        g_lyrics_status = 1;
    } else {
        // unsync lyrics
        g_lyrics_status = 2;
    }
    return t_tab;
}

function parse_tag(tag, delimiter) {
    var t_tab = Array();
    var i, j;
    j = 0;
    for(i=0;i<tag.length;i++) {
        if(i==tag.length-1 || tag.charCodeAt(i)==10 || (i>0 && (i<tag.length-5) && (tag.substring(i, i+1)==delimiter) && (tag.substring(i-1, i)!="]"))) {
            if(i==tag.length-1) {
                t_tab.push(tag.substring(j, i+1));
            } else {
                t_tab.push(tag.substring(j, i));
            }
            if(tag.charCodeAt(i)!=10) {
                j = i;
            } else {
                j = i+1;
            }
        }
    }
    return grab_timer(check_lyrics_type(t_tab));
}

function load_track_info() {
    var tab = Array(new sentence, new sentence, new sentence, new sentence);
    var count = 0;
    tab[count].text = "---";
    count++;
    tab[count].text = artist.Eval();
    count++;
    tab[count].text = title.Eval();
    count++;
    tab[count].text = "---";
    count++;
    return calc_lines(tab);
}

function open_file(filePath, fileName, ioMode) {
    var fileInst = null;
    var bool = file_exists(filePath + fileName);
    if(bool) {
        fileInst = g_fso.OpenTextFile(filePath + fileName, ioMode);
    }
    return fileInst;
}

function close_file(fileInst) {
        fileInst.Close();
}

function read_file(fileInst) {
    var line = fileInst.ReadLine();
    return line;
}

function folder_exists(folderPath) {
    var fso, bool;
    fso = new ActiveXObject("Scripting.FileSystemObject");
    bool = fso.FolderExists(folderPath);
    return bool;
}

function file_exists(filePath) {
    var fso, bool;
    fso = new ActiveXObject("Scripting.FileSystemObject");
    bool = fso.Fileexists(filePath);
    return bool;
}

function lyrics_folder_exists(folder_name) {
    var fso;
    var bool=1;
    fso = new ActiveXObject("Scripting.FileSystemObject");
    if (folder_exists(fb.ProfilePath + folder_name) == false) {
        fso.CreateFolder(fb.ProfilePath + folder_name);
        bool=0;
    }
    return bool;
}

function change_focus() {
    var i, j;
    var t1 = elap_seconds.Eval()*100+centiemes;
    if(g_lyrics_status>0) {
        // search line index just after actual timer
        for(i=0;i<g_tab.length;i++) {
            if(g_tab[i].timer>t1) break;
        }
        focus_next=i;
        focus = (i>0)?i-1:0;
        // now i check if there are more than one line with the same timer as focus one & if found, i take it as new focus 'cause it's the first (not a blank line)
        if(focus>0) {
            for(i=0;i<focus;i++) {
                if(g_tab[i].timer==focus) {
                    focus = i;
                    break;
                }
            }
        }
    }
}

function calc_lines(ctab) {
    var i, j;
    var padx = 0;
    var tmp_img;
    var gp;
    var lineh;
    g_tab_length = 0;
    if(ww==0) return ctab; // test to avoid errors if panel is hidden (ww=0)
    tmp_img = gdi.CreateImage(ww-(H_PADDING*2)-padx, 100);
    gp = tmp_img.GetGraphics();
    for(i=0;i<ctab.length;i++) {
        // calc sentence #lines to display / window.width
        lineh = gp.MeasureString(ctab[i].text, g_font, 0, 0, ww-(H_PADDING*2)-padx, wh).Height;
        ctab[i].total_lines = (lineh/LINE_HEIGHT) > Math.floor(lineh/LINE_HEIGHT) ? Math.floor(lineh/LINE_HEIGHT) + 1 : Math.floor(lineh/LINE_HEIGHT)  ;
        ctab[i].ante_lines = 0;
        for(j=0;j<i;j++) {
            ctab[i].ante_lines += ctab[j].total_lines;
        }
        g_tab_length += ctab[i].total_lines;
    }
    CollectGarbage();
    return ctab;
}

function sort_tab(tab2sort) {
    var tab = Array();
    var i, j;
    var tmp = new sentence;
    var smallest = 0;
    for(i=0;i<tab2sort.length;i++) {
        for(j=i;j<tab2sort.length;j++) {
            if(tab2sort[i].timer > tab2sort[j].timer) {
                tmp = tab2sort[i];
                tab2sort[i] = tab2sort[j];
                tab2sort[j] = tmp;
            }
        }
        tab.push(tab2sort[i]);
    }
    return tab;
}

function remove_enhanced_balises(str) {
    var i;
    var chr1, chr2;
    var new_str="";
    for(i=0;i<str.length;i++) {
        chr1 = str.substring(i, i+1);
        if(i+10<=str.length) chr2 = str.substring(i+9, i+10); else chr2=null;
        if(chr1=="<" && chr2==">") {
            i = i + 10 - 1;
        } else {
            new_str = new_str + chr1;
        }
    }
    return new_str;
}

function ts_analyzer(str) {
    var i, j, ch,  ts_len;
    var str2 = "";
    var state=0;
    var deb = -1;
    var fin = -1;
    var sep1 = -1;
    var sep2 = -1;
    var suite=0;
    for(i=0;i<str.length;i++) {
        ch = str.substring(i, i+1);
        switch(state) {
        case 0:
            if(ch=="[" && IsNumeric(str.substring(i+1, i+2))) {
                state=1;
                deb=i;
                fin=-1;
            }
            break;
        case 1:
            if(deb>=0 && ch==":") {
                state=2;
                sep1=i;
            }
            if(i>deb+3) {
                deb=-1;
                fin=-1;
                sep1=-1;
                sep2=-1;
                state=0;
            }
            break;
        case 2:
            if(sep1>=0 && (ch==":" || ch==".")) {
                state=3;
                sep2=i;
            }
            if(sep1>=0 && sep2==-1 && ch=="]") {
                state=4;
                fin=i;
            }
            if(i>sep1+3) {
                deb=-1;
                fin=-1;
                sep1=-1;
                sep2=-1;
                state=0;
            }
            break;
        case 3:
            if(deb>=0 && ch=="]") {
                state=4;
                if(i==str.length-1) {
                    str=str+" ";
                }
                fin=i;
            }
            if(i>deb+10) {
                deb=-1;
                fin=-1;
                sep1=-1;
                sep2=-1;
                state=0;
            }
            break;
        case 4:
            ts_len=fin-deb+1;
            switch(ts_len) {
                case 6:
                    str2 = str2 + "[0" + str.substring(deb+1,deb+2) + ":" + str.substring(deb+3, deb+5) + ".00]";
                    break;
                case 7:
                    str2 = str2 + str.substring(deb,deb+6) + ".00]";
                    break;
                case 9:
                    str2 = str2 + "[0" + str.substring(deb+1,deb+2) + ":" + str.substring(deb+3, deb+5) + "." + str.substring(deb+6, deb+8) + "]";
                    break;
                case 10:
                    if(sep1==deb+2) {
                        str2 = str2 + "[0" + str.substring(deb+1,deb+2) + ":" + str.substring(deb+3, deb+5) + "." + str.substring(deb+6, deb+8) + "]";
                    } else {
                        str2 = str2 + str.substring(deb,deb+10);
                    }
                    break;
                case 11:
                    str2 = str2 + str.substring(deb,deb+9) + "]";
                    break;
            }
            j += 10;
            if(str.substring(fin+1,fin+2)=="[") {
                suite = 1;
                i = fin;
                deb = -1;
                fin = -1;
                sep1 = -1;
                sep2 = -1;
                state = 0;
            } else {
                suite = -1;
                i = str.length - 1;
                str2 = str2 + str.substring(fin+1, str.length);
            }
            break;
        }
    }
    return str2;
}

function IsNumeric(str) {
    var ValidChars = "0123456789.";
    for (i = 0; i < str.length; i++) {
        if (ValidChars.indexOf(str.charAt(i)) == -1) {
            return false;
        }
    }
    return true;
}

function IsTimestamped(str) {
    var ValidChars = "[0123456789:.]";
    var count = 0;
    for (i = 0; i < (str.length>10?10:str.length); i++) {
        if (ValidChars.indexOf(str.charAt(i)) >=0) {
            count++;
        }
    }
    if(count>=6 && count <=11) {
        return true;
    } else {
        return false;
    }
}

function check_file(path, filename) {
    if(file_exists(path+filename+".lrc")) {
        g_lyrics_filename  = filename+".lrc";
        g_lyrics_path = path;
        return true;
    } else {
        if(file_exists(path+filename+".txt")) {
            g_lyrics_filename  = filename+".txt";
            g_lyrics_path = path;
            return true;
        }
    }
    return false;
}

function get_lyrics() {
    var i, count, delta, tag;
    var tpath = Array(lyrics_dir1.EvalWithMetadb(g_metadb), lyrics_dir2);
    var tfilename= Array(artist.Eval() + " -" + title.Eval(), artist.Eval() + " - " + title.Eval());
    var bool_tag = false;
    var bool_file = false;

    // reset lyrics tab
    g_lyrics_status = 0;
    if(g_tab.length>0) g_tab.splice(0, g_tab.length);
    pos = midpoint;
    focus = 0;
    window.Repaint();

    // check TAGs
    tag = lyrics.Eval();
    if(tag.length>0) {
        bool_tag = true;
        if(tag.substring(0,1)=="[") g_lyrics_status = 1; else g_lyrics_status = 2;
    } else {
        // check files
        i = 0;
        while(!bool_file && i<2) {
            j = 0;
            while(!bool_file && j<2) {
                bool_file = check_file(tpath[i], tfilename[j]);
                j++;
            }
            i++;
        }
    }
    // if lyrics found
    if(bool_tag || bool_file) {
        if(bool_tag) {
            g_tab = parse_tag(tag, "[");
        } else {
            g_tab = load_file(g_lyrics_path, g_lyrics_filename);
        }
    }  else {
        g_tab = load_track_info();
        delta = (g_tab[g_tab.length-1].ante_lines + g_tab[g_tab.length-1].total_lines);
        pos = (wh / 2) - (delta * LINE_HEIGHT / 2);
    }

    if(g_lyrics_status==2) {
        for(i=0;i<g_tab.length-1;i++) {
            g_tab[i].timer = i * Math.floor(len_seconds.Eval() * 100 / g_tab.length);
        }
    }
}