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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 WebInspector.TextUtils = {
     32     /**
     33      * @param {string} char
     34      * @return {boolean}
     35      */
     36     isStopChar: function(char)
     37     {
     38         return (char > " " && char < "0") ||
     39             (char > "9" && char < "A") ||
     40             (char > "Z" && char < "_") ||
     41             (char > "_" && char < "a") ||
     42             (char > "z" && char <= "~");
     43     },
     44 
     45     /**
     46      * @param {string} char
     47      * @return {boolean}
     48      */
     49     isWordChar: function(char)
     50     {
     51         return !WebInspector.TextUtils.isStopChar(char) && !WebInspector.TextUtils.isSpaceChar(char);
     52     },
     53 
     54     /**
     55      * @param {string} char
     56      * @return {boolean}
     57      */
     58     isSpaceChar: function(char)
     59     {
     60         return WebInspector.TextUtils._SpaceCharRegex.test(char);
     61     },
     62 
     63     /**
     64      * @param {string} word
     65      * @return {boolean}
     66      */
     67     isWord: function(word)
     68     {
     69         for (var i = 0; i < word.length; ++i) {
     70             if (!WebInspector.TextUtils.isWordChar(word.charAt(i)))
     71                 return false;
     72         }
     73         return true;
     74     },
     75 
     76     /**
     77      * @param {string} char
     78      * @return {boolean}
     79      */
     80     isOpeningBraceChar: function(char)
     81     {
     82         return char === "(" || char === "{";
     83     },
     84 
     85     /**
     86      * @param {string} char
     87      * @return {boolean}
     88      */
     89     isClosingBraceChar: function(char)
     90     {
     91         return char === ")" || char === "}";
     92     },
     93 
     94     /**
     95      * @param {string} char
     96      * @return {boolean}
     97      */
     98     isBraceChar: function(char)
     99     {
    100         return WebInspector.TextUtils.isOpeningBraceChar(char) || WebInspector.TextUtils.isClosingBraceChar(char);
    101     },
    102 
    103     /**
    104      * @param {string} text
    105      * @param {function(string):boolean} isWordChar
    106      * @return {!Array.<string>}
    107      */
    108     textToWords: function(text, isWordChar)
    109     {
    110         var words = [];
    111         var startWord = -1;
    112         for(var i = 0; i < text.length; ++i) {
    113             if (!isWordChar(text.charAt(i))) {
    114                 if (startWord !== -1)
    115                     words.push(text.substring(startWord, i));
    116                 startWord = -1;
    117             } else if (startWord === -1)
    118                 startWord = i;
    119         }
    120         if (startWord !== -1)
    121             words.push(text.substring(startWord));
    122         return words;
    123     },
    124 
    125     /**
    126      * @param {string} source
    127      * @param {number=} startIndex
    128      * @param {number=} lastIndex
    129      * @return {number}
    130      */
    131     findBalancedCurlyBrackets: function(source, startIndex, lastIndex) {
    132         lastIndex = lastIndex || source.length;
    133         startIndex = startIndex || 0;
    134         var counter = 0;
    135         var inString = false;
    136 
    137         for (var index = startIndex; index < lastIndex; ++index) {
    138             var character = source[index];
    139             if (inString) {
    140                 if (character === "\\")
    141                     ++index;
    142                 else if (character === "\"")
    143                     inString = false;
    144             } else {
    145                 if (character === "\"")
    146                     inString = true;
    147                 else if (character === "{")
    148                     ++counter;
    149                 else if (character === "}") {
    150                     if (--counter === 0)
    151                         return index + 1;
    152                 }
    153             }
    154         }
    155         return -1;
    156     }
    157 }
    158 
    159 WebInspector.TextUtils._SpaceCharRegex = /\s/;
    160 
    161 /**
    162  * @enum {string}
    163  */
    164 WebInspector.TextUtils.Indent = {
    165     TwoSpaces: "  ",
    166     FourSpaces: "    ",
    167     EightSpaces: "        ",
    168     TabCharacter: "\t"
    169 }
    170