[2000] Fix | Delete

//add whitespace separator

[2001] Fix | Delete

ws = new Combinator(tokenStream.token().value, tokenStream.token().startLine, tokenStream.token().startCol);

[2002] Fix | Delete

[2003] Fix | Delete

//combinator is not required

[2004] Fix | Delete

combinator = this._combinator();

[2005] Fix | Delete

[2006] Fix | Delete

//selector is required if there's a combinator

[2007] Fix | Delete

nextSelector = this._simple_selector_sequence();

[2008] Fix | Delete

if (nextSelector === null) {

[2009] Fix | Delete

if (combinator !== null) {

[2010] Fix | Delete

this._unexpectedToken(tokenStream.LT(1));

[2011] Fix | Delete

}

[2012] Fix | Delete

} else {

[2013] Fix | Delete

[2014] Fix | Delete

if (combinator !== null) {

[2015] Fix | Delete

selector.push(combinator);

[2016] Fix | Delete

} else {

[2017] Fix | Delete

selector.push(ws);

[2018] Fix | Delete

}

[2019] Fix | Delete

[2020] Fix | Delete

selector.push(nextSelector);

[2021] Fix | Delete

}

[2022] Fix | Delete

} else {

[2023] Fix | Delete

break;

[2024] Fix | Delete

}

[2025] Fix | Delete

[2026] Fix | Delete

}

[2027] Fix | Delete

} while (true);

[2028] Fix | Delete

[2029] Fix | Delete

return new Selector(selector, selector[0].line, selector[0].col);

[2030] Fix | Delete

},

[2031] Fix | Delete

[2032] Fix | Delete

//CSS3 Selectors

[2033] Fix | Delete

_simple_selector_sequence: function() {

[2034] Fix | Delete

/*

[2035] Fix | Delete

* simple_selector_sequence

[2036] Fix | Delete

* : [ type_selector | universal ]

[2037] Fix | Delete

* [ HASH | class | attrib | pseudo | negation ]*

[2038] Fix | Delete

* | [ HASH | class | attrib | pseudo | negation ]+

[2039] Fix | Delete

* ;

[2040] Fix | Delete

*/

[2041] Fix | Delete

[2042] Fix | Delete

var tokenStream = this._tokenStream,

[2043] Fix | Delete

[2044] Fix | Delete

//parts of a simple selector

[2045] Fix | Delete

elementName = null,

[2046] Fix | Delete

modifiers = [],

[2047] Fix | Delete

[2048] Fix | Delete

//complete selector text

[2049] Fix | Delete

selectorText= "",

[2050] Fix | Delete

[2051] Fix | Delete

//the different parts after the element name to search for

[2052] Fix | Delete

components = [

[2053] Fix | Delete

//HASH

[2054] Fix | Delete

function() {

[2055] Fix | Delete

return tokenStream.match(Tokens.HASH) ?

[2056] Fix | Delete

new SelectorSubPart(tokenStream.token().value, "id", tokenStream.token().startLine, tokenStream.token().startCol) :

[2057] Fix | Delete

null;

[2058] Fix | Delete

},

[2059] Fix | Delete

this._class,

[2060] Fix | Delete

this._attrib,

[2061] Fix | Delete

this._pseudo,

[2062] Fix | Delete

this._negation

[2063] Fix | Delete

],

[2064] Fix | Delete

i = 0,

[2065] Fix | Delete

len = components.length,

[2066] Fix | Delete

component = null,

[2067] Fix | Delete

line,

[2068] Fix | Delete

col;

[2069] Fix | Delete

[2070] Fix | Delete

[2071] Fix | Delete

//get starting line and column for the selector

[2072] Fix | Delete

line = tokenStream.LT(1).startLine;

[2073] Fix | Delete

col = tokenStream.LT(1).startCol;

[2074] Fix | Delete

[2075] Fix | Delete

elementName = this._type_selector();

[2076] Fix | Delete

if (!elementName) {

[2077] Fix | Delete

elementName = this._universal();

[2078] Fix | Delete

}

[2079] Fix | Delete

[2080] Fix | Delete

if (elementName !== null) {

[2081] Fix | Delete

selectorText += elementName;

[2082] Fix | Delete

}

[2083] Fix | Delete

[2084] Fix | Delete

while (true) {

[2085] Fix | Delete

[2086] Fix | Delete

//whitespace means we're done

[2087] Fix | Delete

if (tokenStream.peek() === Tokens.S) {

[2088] Fix | Delete

break;

[2089] Fix | Delete

}

[2090] Fix | Delete

[2091] Fix | Delete

//check for each component

[2092] Fix | Delete

while (i < len && component === null) {

[2093] Fix | Delete

component = components[i++].call(this);

[2094] Fix | Delete

}

[2095] Fix | Delete

[2096] Fix | Delete

if (component === null) {

[2097] Fix | Delete

[2098] Fix | Delete

//we don't have a selector

[2099] Fix | Delete

if (selectorText === "") {

[2100] Fix | Delete

return null;

[2101] Fix | Delete

} else {

[2102] Fix | Delete

break;

[2103] Fix | Delete

}

[2104] Fix | Delete

} else {

[2105] Fix | Delete

i = 0;

[2106] Fix | Delete

modifiers.push(component);

[2107] Fix | Delete

selectorText += component.toString();

[2108] Fix | Delete

component = null;

[2109] Fix | Delete

}

[2110] Fix | Delete

}

[2111] Fix | Delete

[2112] Fix | Delete

[2113] Fix | Delete

return selectorText !== "" ?

[2114] Fix | Delete

new SelectorPart(elementName, modifiers, selectorText, line, col) :

[2115] Fix | Delete

null;

[2116] Fix | Delete

},

[2117] Fix | Delete

[2118] Fix | Delete

//CSS3 Selectors

[2119] Fix | Delete

_type_selector: function() {

[2120] Fix | Delete

/*

[2121] Fix | Delete

* type_selector

[2122] Fix | Delete

* : [ namespace_prefix ]? element_name

[2123] Fix | Delete

* ;

[2124] Fix | Delete

*/

[2125] Fix | Delete

[2126] Fix | Delete

var tokenStream = this._tokenStream,

[2127] Fix | Delete

ns = this._namespace_prefix(),

[2128] Fix | Delete

elementName = this._element_name();

[2129] Fix | Delete

[2130] Fix | Delete

if (!elementName) {

[2131] Fix | Delete

/*

[2132] Fix | Delete

* Need to back out the namespace that was read due to both

[2133] Fix | Delete

* type_selector and universal reading namespace_prefix

[2134] Fix | Delete

* first. Kind of hacky, but only way I can figure out

[2135] Fix | Delete

* right now how to not change the grammar.

[2136] Fix | Delete

*/

[2137] Fix | Delete

if (ns) {

[2138] Fix | Delete

tokenStream.unget();

[2139] Fix | Delete

if (ns.length > 1) {

[2140] Fix | Delete

tokenStream.unget();

[2141] Fix | Delete

}

[2142] Fix | Delete

}

[2143] Fix | Delete

[2144] Fix | Delete

return null;

[2145] Fix | Delete

} else {

[2146] Fix | Delete

if (ns) {

[2147] Fix | Delete

elementName.text = ns + elementName.text;

[2148] Fix | Delete

elementName.col -= ns.length;

[2149] Fix | Delete

}

[2150] Fix | Delete

return elementName;

[2151] Fix | Delete

}

[2152] Fix | Delete

},

[2153] Fix | Delete

[2154] Fix | Delete

//CSS3 Selectors

[2155] Fix | Delete

_class: function() {

[2156] Fix | Delete

/*

[2157] Fix | Delete

* class

[2158] Fix | Delete

* : '.' IDENT

[2159] Fix | Delete

* ;

[2160] Fix | Delete

*/

[2161] Fix | Delete

[2162] Fix | Delete

var tokenStream = this._tokenStream,

[2163] Fix | Delete

token;

[2164] Fix | Delete

[2165] Fix | Delete

if (tokenStream.match(Tokens.DOT)) {

[2166] Fix | Delete

tokenStream.mustMatch(Tokens.IDENT);

[2167] Fix | Delete

token = tokenStream.token();

[2168] Fix | Delete

return new SelectorSubPart("." + token.value, "class", token.startLine, token.startCol - 1);

[2169] Fix | Delete

} else {

[2170] Fix | Delete

return null;

[2171] Fix | Delete

}

[2172] Fix | Delete

[2173] Fix | Delete

},

[2174] Fix | Delete

[2175] Fix | Delete

//CSS3 Selectors

[2176] Fix | Delete

_element_name: function() {

[2177] Fix | Delete

/*

[2178] Fix | Delete

* element_name

[2179] Fix | Delete

* : IDENT

[2180] Fix | Delete

* ;

[2181] Fix | Delete

*/

[2182] Fix | Delete

[2183] Fix | Delete

var tokenStream = this._tokenStream,

[2184] Fix | Delete

token;

[2185] Fix | Delete

[2186] Fix | Delete

if (tokenStream.match(Tokens.IDENT)) {

[2187] Fix | Delete

token = tokenStream.token();

[2188] Fix | Delete

return new SelectorSubPart(token.value, "elementName", token.startLine, token.startCol);

[2189] Fix | Delete

[2190] Fix | Delete

} else {

[2191] Fix | Delete

return null;

[2192] Fix | Delete

}

[2193] Fix | Delete

},

[2194] Fix | Delete

[2195] Fix | Delete

//CSS3 Selectors

[2196] Fix | Delete

_namespace_prefix: function() {

[2197] Fix | Delete

/*

[2198] Fix | Delete

* namespace_prefix

[2199] Fix | Delete

* : [ IDENT | '*' ]? '|'

[2200] Fix | Delete

* ;

[2201] Fix | Delete

*/

[2202] Fix | Delete

var tokenStream = this._tokenStream,

[2203] Fix | Delete

value = "";

[2204] Fix | Delete

[2205] Fix | Delete

//verify that this is a namespace prefix

[2206] Fix | Delete

if (tokenStream.LA(1) === Tokens.PIPE || tokenStream.LA(2) === Tokens.PIPE) {

[2207] Fix | Delete

[2208] Fix | Delete

if (tokenStream.match([Tokens.IDENT, Tokens.STAR])) {

[2209] Fix | Delete

value += tokenStream.token().value;

[2210] Fix | Delete

}

[2211] Fix | Delete

[2212] Fix | Delete

tokenStream.mustMatch(Tokens.PIPE);

[2213] Fix | Delete

value += "|";

[2214] Fix | Delete

[2215] Fix | Delete

}

[2216] Fix | Delete

[2217] Fix | Delete

return value.length ? value : null;

[2218] Fix | Delete

},

[2219] Fix | Delete

[2220] Fix | Delete

//CSS3 Selectors

[2221] Fix | Delete

_universal: function() {

[2222] Fix | Delete

/*

[2223] Fix | Delete

* universal

[2224] Fix | Delete

* : [ namespace_prefix ]? '*'

[2225] Fix | Delete

* ;

[2226] Fix | Delete

*/

[2227] Fix | Delete

var tokenStream = this._tokenStream,

[2228] Fix | Delete

value = "",

[2229] Fix | Delete

ns;

[2230] Fix | Delete

[2231] Fix | Delete

ns = this._namespace_prefix();

[2232] Fix | Delete

if (ns) {

[2233] Fix | Delete

value += ns;

[2234] Fix | Delete

}

[2235] Fix | Delete

[2236] Fix | Delete

if (tokenStream.match(Tokens.STAR)) {

[2237] Fix | Delete

value += "*";

[2238] Fix | Delete

}

[2239] Fix | Delete

[2240] Fix | Delete

return value.length ? value : null;

[2241] Fix | Delete

[2242] Fix | Delete

},

[2243] Fix | Delete

[2244] Fix | Delete

//CSS3 Selectors

[2245] Fix | Delete

_attrib: function() {

[2246] Fix | Delete

/*

[2247] Fix | Delete

* attrib

[2248] Fix | Delete

* : '[' S* [ namespace_prefix ]? IDENT S*

[2249] Fix | Delete

* [ [ PREFIXMATCH |

[2250] Fix | Delete

* SUFFIXMATCH |

[2251] Fix | Delete

* SUBSTRINGMATCH |

[2252] Fix | Delete

* '=' |

[2253] Fix | Delete

* INCLUDES |

[2254] Fix | Delete

* DASHMATCH ] S* [ IDENT | STRING ] S*

[2255] Fix | Delete

* ]? ']'

[2256] Fix | Delete

* ;

[2257] Fix | Delete

*/

[2258] Fix | Delete

[2259] Fix | Delete

var tokenStream = this._tokenStream,

[2260] Fix | Delete

value = null,

[2261] Fix | Delete

ns,

[2262] Fix | Delete

token;

[2263] Fix | Delete

[2264] Fix | Delete

if (tokenStream.match(Tokens.LBRACKET)) {

[2265] Fix | Delete

token = tokenStream.token();

[2266] Fix | Delete

value = token.value;

[2267] Fix | Delete

value += this._readWhitespace();

[2268] Fix | Delete

[2269] Fix | Delete

ns = this._namespace_prefix();

[2270] Fix | Delete

[2271] Fix | Delete

if (ns) {

[2272] Fix | Delete

value += ns;

[2273] Fix | Delete

}

[2274] Fix | Delete

[2275] Fix | Delete

tokenStream.mustMatch(Tokens.IDENT);

[2276] Fix | Delete

value += tokenStream.token().value;

[2277] Fix | Delete

value += this._readWhitespace();

[2278] Fix | Delete

[2279] Fix | Delete

if (tokenStream.match([Tokens.PREFIXMATCH, Tokens.SUFFIXMATCH, Tokens.SUBSTRINGMATCH,

[2280] Fix | Delete

Tokens.EQUALS, Tokens.INCLUDES, Tokens.DASHMATCH])) {

[2281] Fix | Delete

[2282] Fix | Delete

value += tokenStream.token().value;

[2283] Fix | Delete

value += this._readWhitespace();

[2284] Fix | Delete

[2285] Fix | Delete

tokenStream.mustMatch([Tokens.IDENT, Tokens.STRING]);

[2286] Fix | Delete

value += tokenStream.token().value;

[2287] Fix | Delete

value += this._readWhitespace();

[2288] Fix | Delete

}

[2289] Fix | Delete

[2290] Fix | Delete

tokenStream.mustMatch(Tokens.RBRACKET);

[2291] Fix | Delete

[2292] Fix | Delete

return new SelectorSubPart(value + "]", "attribute", token.startLine, token.startCol);

[2293] Fix | Delete

} else {

[2294] Fix | Delete

return null;

[2295] Fix | Delete

}

[2296] Fix | Delete

},

[2297] Fix | Delete

[2298] Fix | Delete

//CSS3 Selectors

[2299] Fix | Delete

_pseudo: function() {

[2300] Fix | Delete

[2301] Fix | Delete

/*

[2302] Fix | Delete

* pseudo

[2303] Fix | Delete

* : ':' ':'? [ IDENT | functional_pseudo ]

[2304] Fix | Delete

* ;

[2305] Fix | Delete

*/

[2306] Fix | Delete

[2307] Fix | Delete

var tokenStream = this._tokenStream,

[2308] Fix | Delete

pseudo = null,

[2309] Fix | Delete

colons = ":",

[2310] Fix | Delete

line,

[2311] Fix | Delete

col;

[2312] Fix | Delete

[2313] Fix | Delete

if (tokenStream.match(Tokens.COLON)) {

[2314] Fix | Delete

[2315] Fix | Delete

if (tokenStream.match(Tokens.COLON)) {

[2316] Fix | Delete

colons += ":";

[2317] Fix | Delete

}

[2318] Fix | Delete

[2319] Fix | Delete

if (tokenStream.match(Tokens.IDENT)) {

[2320] Fix | Delete

pseudo = tokenStream.token().value;

[2321] Fix | Delete

line = tokenStream.token().startLine;

[2322] Fix | Delete

col = tokenStream.token().startCol - colons.length;

[2323] Fix | Delete

} else if (tokenStream.peek() === Tokens.FUNCTION) {

[2324] Fix | Delete

line = tokenStream.LT(1).startLine;

[2325] Fix | Delete

col = tokenStream.LT(1).startCol - colons.length;

[2326] Fix | Delete

pseudo = this._functional_pseudo();

[2327] Fix | Delete

}

[2328] Fix | Delete

[2329] Fix | Delete

if (pseudo) {

[2330] Fix | Delete

pseudo = new SelectorSubPart(colons + pseudo, "pseudo", line, col);

[2331] Fix | Delete

} else {

[2332] Fix | Delete

var startLine = tokenStream.LT(1).startLine,

[2333] Fix | Delete

startCol = tokenStream.LT(0).startCol;

[2334] Fix | Delete

throw new SyntaxError("Expected a `FUNCTION` or `IDENT` after colon at line " + startLine + ", col " + startCol + ".", startLine, startCol);

[2335] Fix | Delete

}

[2336] Fix | Delete

}

[2337] Fix | Delete

[2338] Fix | Delete

return pseudo;

[2339] Fix | Delete

},

[2340] Fix | Delete

[2341] Fix | Delete

//CSS3 Selectors

[2342] Fix | Delete

_functional_pseudo: function() {

[2343] Fix | Delete

/*

[2344] Fix | Delete

* functional_pseudo

[2345] Fix | Delete

* : FUNCTION S* expression ')'

[2346] Fix | Delete

* ;

[2347] Fix | Delete

*/

[2348] Fix | Delete

[2349] Fix | Delete

var tokenStream = this._tokenStream,

[2350] Fix | Delete

value = null;

[2351] Fix | Delete

[2352] Fix | Delete

if (tokenStream.match(Tokens.FUNCTION)) {

[2353] Fix | Delete

value = tokenStream.token().value;

[2354] Fix | Delete

value += this._readWhitespace();

[2355] Fix | Delete

value += this._expression();

[2356] Fix | Delete

tokenStream.mustMatch(Tokens.RPAREN);

[2357] Fix | Delete

value += ")";

[2358] Fix | Delete

}

[2359] Fix | Delete

[2360] Fix | Delete

return value;

[2361] Fix | Delete

},

[2362] Fix | Delete

[2363] Fix | Delete

//CSS3 Selectors

[2364] Fix | Delete

_expression: function() {

[2365] Fix | Delete

/*

[2366] Fix | Delete

* expression

[2367] Fix | Delete

* : [ [ PLUS | '-' | DIMENSION | NUMBER | STRING | IDENT ] S* ]+

[2368] Fix | Delete

* ;

[2369] Fix | Delete

*/

[2370] Fix | Delete

[2371] Fix | Delete

var tokenStream = this._tokenStream,

[2372] Fix | Delete

value = "";

[2373] Fix | Delete

[2374] Fix | Delete

while (tokenStream.match([Tokens.PLUS, Tokens.MINUS, Tokens.DIMENSION,

[2375] Fix | Delete

Tokens.NUMBER, Tokens.STRING, Tokens.IDENT, Tokens.LENGTH,

[2376] Fix | Delete

Tokens.FREQ, Tokens.ANGLE, Tokens.TIME,

[2377] Fix | Delete

Tokens.RESOLUTION, Tokens.SLASH])) {

[2378] Fix | Delete

[2379] Fix | Delete

value += tokenStream.token().value;

[2380] Fix | Delete

value += this._readWhitespace();

[2381] Fix | Delete

}

[2382] Fix | Delete

[2383] Fix | Delete

return value.length ? value : null;

[2384] Fix | Delete

[2385] Fix | Delete

},

[2386] Fix | Delete

[2387] Fix | Delete

//CSS3 Selectors

[2388] Fix | Delete

_negation: function() {

[2389] Fix | Delete

/*

[2390] Fix | Delete

* negation

[2391] Fix | Delete

* : NOT S* negation_arg S* ')'

[2392] Fix | Delete

* ;

[2393] Fix | Delete

*/

[2394] Fix | Delete

[2395] Fix | Delete

var tokenStream = this._tokenStream,

[2396] Fix | Delete

line,

[2397] Fix | Delete

col,

[2398] Fix | Delete

value = "",

[2399] Fix | Delete

arg,

[2400] Fix | Delete

subpart = null;

[2401] Fix | Delete

[2402] Fix | Delete

if (tokenStream.match(Tokens.NOT)) {

[2403] Fix | Delete

value = tokenStream.token().value;

[2404] Fix | Delete

line = tokenStream.token().startLine;

[2405] Fix | Delete

col = tokenStream.token().startCol;

[2406] Fix | Delete

value += this._readWhitespace();

[2407] Fix | Delete

arg = this._negation_arg();

[2408] Fix | Delete

value += arg;

[2409] Fix | Delete

value += this._readWhitespace();

[2410] Fix | Delete

tokenStream.match(Tokens.RPAREN);

[2411] Fix | Delete

value += tokenStream.token().value;

[2412] Fix | Delete

[2413] Fix | Delete

subpart = new SelectorSubPart(value, "not", line, col);

[2414] Fix | Delete

subpart.args.push(arg);

[2415] Fix | Delete

}

[2416] Fix | Delete

[2417] Fix | Delete

return subpart;

[2418] Fix | Delete

},

[2419] Fix | Delete

[2420] Fix | Delete

//CSS3 Selectors

[2421] Fix | Delete

_negation_arg: function() {

[2422] Fix | Delete

/*

[2423] Fix | Delete

* negation_arg

[2424] Fix | Delete

* : type_selector | universal | HASH | class | attrib | pseudo

[2425] Fix | Delete

* ;

[2426] Fix | Delete

*/

[2427] Fix | Delete

[2428] Fix | Delete

var tokenStream = this._tokenStream,

[2429] Fix | Delete

args = [

[2430] Fix | Delete

this._type_selector,

[2431] Fix | Delete

this._universal,

[2432] Fix | Delete

function() {

[2433] Fix | Delete

return tokenStream.match(Tokens.HASH) ?

[2434] Fix | Delete

new SelectorSubPart(tokenStream.token().value, "id", tokenStream.token().startLine, tokenStream.token().startCol) :

[2435] Fix | Delete

null;

[2436] Fix | Delete

},

[2437] Fix | Delete

this._class,

[2438] Fix | Delete

this._attrib,

[2439] Fix | Delete

this._pseudo

[2440] Fix | Delete

],

[2441] Fix | Delete

arg = null,

[2442] Fix | Delete

i = 0,

[2443] Fix | Delete

len = args.length,

[2444] Fix | Delete

line,

[2445] Fix | Delete

col,

[2446] Fix | Delete

part;

[2447] Fix | Delete

[2448] Fix | Delete

line = tokenStream.LT(1).startLine;

[2449] Fix | Delete

col = tokenStream.LT(1).startCol;

[2450] Fix | Delete

[2451] Fix | Delete

while (i < len && arg === null) {

[2452] Fix | Delete

[2453] Fix | Delete

arg = args[i].call(this);

[2454] Fix | Delete

i++;

[2455] Fix | Delete

}

[2456] Fix | Delete

[2457] Fix | Delete

//must be a negation arg

[2458] Fix | Delete

if (arg === null) {

[2459] Fix | Delete

this._unexpectedToken(tokenStream.LT(1));

[2460] Fix | Delete

}

[2461] Fix | Delete

[2462] Fix | Delete

//it's an element name

[2463] Fix | Delete

if (arg.type === "elementName") {

[2464] Fix | Delete

part = new SelectorPart(arg, [], arg.toString(), line, col);

[2465] Fix | Delete

} else {

[2466] Fix | Delete

part = new SelectorPart(null, [arg], arg.toString(), line, col);

[2467] Fix | Delete

}

[2468] Fix | Delete

[2469] Fix | Delete

return part;

[2470] Fix | Delete

},

[2471] Fix | Delete

[2472] Fix | Delete

_declaration: function() {

[2473] Fix | Delete

[2474] Fix | Delete

/*

[2475] Fix | Delete

* declaration

[2476] Fix | Delete

* : property ':' S* expr prio?

[2477] Fix | Delete

* | /( empty )/

[2478] Fix | Delete

* ;

[2479] Fix | Delete

*/

[2480] Fix | Delete

[2481] Fix | Delete

var tokenStream = this._tokenStream,

[2482] Fix | Delete

property = null,

[2483] Fix | Delete

expr = null,

[2484] Fix | Delete

prio = null,

[2485] Fix | Delete

invalid = null,

[2486] Fix | Delete

propertyName= "";

[2487] Fix | Delete

[2488] Fix | Delete

property = this._property();

[2489] Fix | Delete

if (property !== null) {

[2490] Fix | Delete

[2491] Fix | Delete

tokenStream.mustMatch(Tokens.COLON);

[2492] Fix | Delete

this._readWhitespace();

[2493] Fix | Delete

[2494] Fix | Delete

expr = this._expr();

[2495] Fix | Delete

[2496] Fix | Delete

//if there's no parts for the value, it's an error

[2497] Fix | Delete

if (!expr || expr.length === 0) {

[2498] Fix | Delete

this._unexpectedToken(tokenStream.LT(1));

[2499] Fix | Delete