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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
31WebInspector.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
159WebInspector.TextUtils._SpaceCharRegex = /\s/;
160
161/**
162 * @enum {string}
163 */
164WebInspector.TextUtils.Indent = {
165    TwoSpaces: "  ",
166    FourSpaces: "    ",
167    EightSpaces: "        ",
168    TabCharacter: "\t"
169}
170