| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| (function(global, utils) { |
| |
| "use strict"; |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalString = global.String; |
| var matchSymbol = utils.ImportNow("match_symbol"); |
| var searchSymbol = utils.ImportNow("search_symbol"); |
| |
| //------------------------------------------------------------------- |
| |
| // ES#sec-createhtml |
| function HtmlEscape(str) { |
| return %RegExpInternalReplace(/"/g, TO_STRING(str), """); |
| } |
| |
| // Set up the non-enumerable functions on the String prototype object. |
| DEFINE_METHODS( |
| GlobalString.prototype, |
| { |
| /* ES#sec-string.prototype.match */ |
| match(pattern) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.match"); |
| |
| if (!IS_NULL_OR_UNDEFINED(pattern)) { |
| var matcher = pattern[matchSymbol]; |
| if (!IS_UNDEFINED(matcher)) { |
| return %_Call(matcher, pattern, this); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| |
| // Equivalent to RegExpCreate (ES#sec-regexpcreate) |
| var regexp = %RegExpCreate(pattern); |
| return regexp[matchSymbol](subject); |
| } |
| |
| /* ES#sec-string.prototype.search */ |
| search(pattern) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.search"); |
| |
| if (!IS_NULL_OR_UNDEFINED(pattern)) { |
| var searcher = pattern[searchSymbol]; |
| if (!IS_UNDEFINED(searcher)) { |
| return %_Call(searcher, pattern, this); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| |
| // Equivalent to RegExpCreate (ES#sec-regexpcreate) |
| var regexp = %RegExpCreate(pattern); |
| return %_Call(regexp[searchSymbol], regexp, subject); |
| } |
| |
| /* ES#sec-string.prototype.anchor */ |
| anchor(name) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.anchor"); |
| return "<a name=\"" + HtmlEscape(name) + "\">" + TO_STRING(this) + |
| "</a>"; |
| } |
| |
| /* ES#sec-string.prototype.big */ |
| big() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.big"); |
| return "<big>" + TO_STRING(this) + "</big>"; |
| } |
| |
| /* ES#sec-string.prototype.blink */ |
| blink() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.blink"); |
| return "<blink>" + TO_STRING(this) + "</blink>"; |
| } |
| |
| /* ES#sec-string.prototype.bold */ |
| bold() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.bold"); |
| return "<b>" + TO_STRING(this) + "</b>"; |
| } |
| |
| /* ES#sec-string.prototype.fixed */ |
| fixed() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fixed"); |
| return "<tt>" + TO_STRING(this) + "</tt>"; |
| } |
| |
| /* ES#sec-string.prototype.fontcolor */ |
| fontcolor(color) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontcolor"); |
| return "<font color=\"" + HtmlEscape(color) + "\">" + TO_STRING(this) + |
| "</font>"; |
| } |
| |
| /* ES#sec-string.prototype.fontsize */ |
| fontsize(size) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontsize"); |
| return "<font size=\"" + HtmlEscape(size) + "\">" + TO_STRING(this) + |
| "</font>"; |
| } |
| |
| /* ES#sec-string.prototype.italics */ |
| italics() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.italics"); |
| return "<i>" + TO_STRING(this) + "</i>"; |
| } |
| |
| /* ES#sec-string.prototype.link */ |
| link(s) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.link"); |
| return "<a href=\"" + HtmlEscape(s) + "\">" + TO_STRING(this) + "</a>"; |
| } |
| |
| /* ES#sec-string.prototype.small */ |
| small() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.small"); |
| return "<small>" + TO_STRING(this) + "</small>"; |
| } |
| |
| /* ES#sec-string.prototype.strike */ |
| strike() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.strike"); |
| return "<strike>" + TO_STRING(this) + "</strike>"; |
| } |
| |
| /* ES#sec-string.prototype.sub */ |
| sub() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.sub"); |
| return "<sub>" + TO_STRING(this) + "</sub>"; |
| } |
| |
| /* ES#sec-string.prototype.sup */ |
| sup() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.sup"); |
| return "<sup>" + TO_STRING(this) + "</sup>"; |
| } |
| |
| /* ES#sec-string.prototype.repeat */ |
| repeat(count) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.repeat"); |
| |
| var s = TO_STRING(this); |
| var n = TO_INTEGER(count); |
| |
| if (n < 0 || n === INFINITY) throw %make_range_error(kInvalidCountValue); |
| |
| // Early return to allow an arbitrarily-large repeat of the empty string. |
| if (s.length === 0) return ""; |
| |
| // The maximum string length is stored in a smi, so a longer repeat |
| // must result in a range error. |
| if (n > %_MaxSmi()) throw %make_range_error(kInvalidStringLength); |
| |
| var r = ""; |
| while (true) { |
| if (n & 1) r += s; |
| n >>= 1; |
| if (n === 0) return r; |
| s += s; |
| } |
| } |
| |
| /* ES#sec-string.prototype.codepointat */ |
| codePointAt(pos) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.codePointAt"); |
| |
| var string = TO_STRING(this); |
| var size = string.length; |
| pos = TO_INTEGER(pos); |
| if (pos < 0 || pos >= size) { |
| return UNDEFINED; |
| } |
| var first = %_StringCharCodeAt(string, pos); |
| if (first < 0xD800 || first > 0xDBFF || pos + 1 == size) { |
| return first; |
| } |
| var second = %_StringCharCodeAt(string, pos + 1); |
| if (second < 0xDC00 || second > 0xDFFF) { |
| return first; |
| } |
| return (first - 0xD800) * 0x400 + second + 0x2400; |
| } |
| } |
| ); |
| |
| function StringPad(thisString, maxLength, fillString) { |
| maxLength = TO_LENGTH(maxLength); |
| var stringLength = thisString.length; |
| |
| if (maxLength <= stringLength) return ""; |
| |
| if (IS_UNDEFINED(fillString)) { |
| fillString = " "; |
| } else { |
| fillString = TO_STRING(fillString); |
| if (fillString === "") { |
| // If filler is the empty String, return S. |
| return ""; |
| } |
| } |
| |
| var fillLength = maxLength - stringLength; |
| var repetitions = (fillLength / fillString.length) | 0; |
| var remainingChars = (fillLength - fillString.length * repetitions) | 0; |
| |
| var filler = ""; |
| while (true) { |
| if (repetitions & 1) filler += fillString; |
| repetitions >>= 1; |
| if (repetitions === 0) break; |
| fillString += fillString; |
| } |
| |
| if (remainingChars) { |
| filler += %_SubString(fillString, 0, remainingChars); |
| } |
| |
| return filler; |
| } |
| |
| DEFINE_METHODS_LEN( |
| GlobalString.prototype, |
| { |
| /* ES#sec-string.prototype.padstart */ |
| /* String.prototype.padStart(maxLength [, fillString]) */ |
| padStart(maxLength, fillString) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.padStart"); |
| var thisString = TO_STRING(this); |
| |
| return StringPad(thisString, maxLength, fillString) + thisString; |
| } |
| |
| /* ES#sec-string.prototype.padend */ |
| /* String.prototype.padEnd(maxLength [, fillString]) */ |
| padEnd(maxLength, fillString) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.padEnd"); |
| var thisString = TO_STRING(this); |
| |
| return thisString + StringPad(thisString, maxLength, fillString); |
| } |
| }, |
| 1 /* Set functions length */ |
| ); |
| |
| // ------------------------------------------------------------------- |
| // String methods related to templates |
| |
| // Set up the non-enumerable functions on the String object. |
| DEFINE_METHOD( |
| GlobalString, |
| |
| /* ES#sec-string.raw */ |
| raw(callSite) { |
| var numberOfSubstitutions = arguments.length; |
| var cooked = TO_OBJECT(callSite); |
| var raw = TO_OBJECT(cooked.raw); |
| var literalSegments = TO_LENGTH(raw.length); |
| if (literalSegments <= 0) return ""; |
| |
| var result = TO_STRING(raw[0]); |
| |
| for (var i = 1; i < literalSegments; ++i) { |
| if (i < numberOfSubstitutions) { |
| result += TO_STRING(arguments[i]); |
| } |
| result += TO_STRING(raw[i]); |
| } |
| |
| return result; |
| } |
| ); |
| |
| // ------------------------------------------------------------------- |
| |
| }) |