1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla SVG Project code.
16 : *
17 : * The Initial Developer of the Original Code is the Mozilla Foundation.
18 : * Portions created by the Initial Developer are Copyright (C) 2010
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : *
23 : * Alternatively, the contents of this file may be used under the terms of
24 : * either the GNU General Public License Version 2 or later (the "GPL"), or
25 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26 : * in which case the provisions of the GPL or the LGPL are applicable instead
27 : * of those above. If you wish to allow use of your version of this file only
28 : * under the terms of either the GPL or the LGPL, and not to allow others to
29 : * use your version of this file under the terms of the MPL, indicate your
30 : * decision by deleting the provisions above and replace them with the notice
31 : * and other provisions required by the GPL or the LGPL. If you do not delete
32 : * the provisions above, a recipient may use your version of this file under
33 : * the terms of any one of the MPL, the GPL or the LGPL.
34 : *
35 : * ***** END LICENSE BLOCK ***** */
36 :
37 : #include "mozilla/Util.h"
38 :
39 : #include "SVGPointList.h"
40 : #include "SVGAnimatedPointList.h"
41 : #include "nsSVGElement.h"
42 : #include "nsDOMError.h"
43 : #include "nsString.h"
44 : #include "nsSVGUtils.h"
45 : #include "string.h"
46 : #include "prdtoa.h"
47 : #include "nsTextFormatter.h"
48 : #include "nsCharSeparatedTokenizer.h"
49 : #include "nsMathUtils.h"
50 :
51 : namespace mozilla {
52 :
53 : nsresult
54 0 : SVGPointList::CopyFrom(const SVGPointList& rhs)
55 : {
56 0 : if (!SetCapacity(rhs.Length())) {
57 : // Yes, we do want fallible alloc here
58 0 : return NS_ERROR_OUT_OF_MEMORY;
59 : }
60 0 : mItems = rhs.mItems;
61 0 : return NS_OK;
62 : }
63 :
64 : void
65 0 : SVGPointList::GetValueAsString(nsAString& aValue) const
66 : {
67 0 : aValue.Truncate();
68 : PRUnichar buf[50];
69 0 : PRUint32 last = mItems.Length() - 1;
70 0 : for (PRUint32 i = 0; i < mItems.Length(); ++i) {
71 : // Would like to use aValue.AppendPrintf("%f,%f", item.mX, item.mY),
72 : // but it's not possible to always avoid trailing zeros.
73 : nsTextFormatter::snprintf(buf, ArrayLength(buf),
74 0 : NS_LITERAL_STRING("%g,%g").get(),
75 0 : double(mItems[i].mX), double(mItems[i].mY));
76 : // We ignore OOM, since it's not useful for us to return an error.
77 0 : aValue.Append(buf);
78 0 : if (i != last) {
79 0 : aValue.Append(' ');
80 : }
81 : }
82 0 : }
83 :
84 : static inline char* SkipWhitespace(char* str)
85 : {
86 : while (IsSVGWhitespace(*str))
87 : ++str;
88 : return str;
89 : }
90 :
91 : nsresult
92 0 : SVGPointList::SetValueFromString(const nsAString& aValue)
93 : {
94 : // The spec says that the list is parsed and accepted up to the first error
95 : // encountered, so we must call CopyFrom even if an error occurs. We still
96 : // want to throw any error code from setAttribute if there's a problem
97 : // though, so we must take care to return any error code.
98 :
99 0 : nsresult rv = NS_OK;
100 :
101 0 : SVGPointList temp;
102 :
103 : nsCharSeparatedTokenizerTemplate<IsSVGWhitespace>
104 0 : tokenizer(aValue, ',', nsCharSeparatedTokenizer::SEPARATOR_OPTIONAL);
105 :
106 0 : nsCAutoString str1, str2; // outside loop to minimize memory churn
107 :
108 0 : while (tokenizer.hasMoreTokens()) {
109 0 : CopyUTF16toUTF8(tokenizer.nextToken(), str1);
110 0 : const char *token1 = str1.get();
111 0 : if (*token1 == '\0') {
112 0 : rv = NS_ERROR_DOM_SYNTAX_ERR;
113 0 : break;
114 : }
115 : char *end;
116 0 : float x = float(PR_strtod(token1, &end));
117 0 : if (end == token1 || !NS_finite(x)) {
118 0 : rv = NS_ERROR_DOM_SYNTAX_ERR;
119 0 : break;
120 : }
121 : const char *token2;
122 0 : if (*end == '-') {
123 : // It's possible for the token to be 10-30 which has
124 : // no separator but needs to be parsed as 10, -30
125 0 : token2 = end;
126 : } else {
127 0 : if (!tokenizer.hasMoreTokens()) {
128 0 : rv = NS_ERROR_DOM_SYNTAX_ERR;
129 0 : break;
130 : }
131 0 : CopyUTF16toUTF8(tokenizer.nextToken(), str2);
132 0 : token2 = str2.get();
133 0 : if (*token2 == '\0') {
134 0 : rv = NS_ERROR_DOM_SYNTAX_ERR;
135 0 : break;
136 : }
137 : }
138 :
139 0 : float y = float(PR_strtod(token2, &end));
140 0 : if (*end != '\0' || !NS_finite(y)) {
141 0 : rv = NS_ERROR_DOM_SYNTAX_ERR;
142 0 : break;
143 : }
144 :
145 0 : temp.AppendItem(SVGPoint(x, y));
146 : }
147 0 : if (tokenizer.lastTokenEndedWithSeparator()) {
148 0 : rv = NS_ERROR_DOM_SYNTAX_ERR; // trailing comma
149 : }
150 0 : nsresult rv2 = CopyFrom(temp);
151 0 : if (NS_FAILED(rv2)) {
152 0 : return rv2; // prioritize OOM error code over syntax errors
153 : }
154 0 : return rv;
155 : }
156 :
157 : } // namespace mozilla
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