1 /*
2 * Copyright (C) 2011, 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include "config.h"
26 #include "core/inspector/InspectorStyleTextEditor.h"
27
28 #include "core/css/CSSPropertySourceData.h"
29 #include "core/html/parser/HTMLParserIdioms.h"
30 #include "core/inspector/InspectorStyleSheet.h"
31
32 namespace blink {
33
InspectorStyleTextEditor(WillBeHeapVector<InspectorStyleProperty> * allProperties,const String & styleText,const SourceRange & styleRange,const NewLineAndWhitespace & format)34 InspectorStyleTextEditor::InspectorStyleTextEditor(WillBeHeapVector<InspectorStyleProperty>* allProperties, const String& styleText, const SourceRange& styleRange, const NewLineAndWhitespace& format)
35 : m_allProperties(allProperties)
36 , m_styleText(styleText)
37 , m_styleRange(styleRange)
38 , m_format(format)
39 {
40 }
41
insertProperty(unsigned index,const String & propertyText)42 void InspectorStyleTextEditor::insertProperty(unsigned index, const String& propertyText)
43 {
44 unsigned styleBodyLength = m_styleRange.length();
45 long propertyStart = 0;
46
47 bool insertLast = true;
48 if (index < m_allProperties->size()) {
49 const InspectorStyleProperty& property = m_allProperties->at(index);
50 if (property.hasSource) {
51 propertyStart = property.sourceData.range.start - m_styleRange.start;
52 // If inserting before a disabled property, it should be shifted, too.
53 insertLast = false;
54 }
55 }
56
57 bool insertFirstInSource = !m_allProperties->size() || !m_allProperties->at(0).hasSource;
58 bool insertLastInSource = true;
59 for (unsigned i = index, size = m_allProperties->size(); i < size; ++i) {
60 const InspectorStyleProperty& property = m_allProperties->at(i);
61 if (property.hasSource) {
62 insertLastInSource = false;
63 break;
64 }
65 }
66
67 String textToSet = propertyText;
68
69 int formattingPrependOffset = 0;
70 if (insertLast && !insertFirstInSource) {
71 propertyStart = styleBodyLength;
72 if (propertyStart && textToSet.length()) {
73 long curPos = propertyStart - 1; // The last position of style declaration, since propertyStart points past one.
74 while (curPos && isHTMLSpace<UChar>(m_styleText[curPos]))
75 --curPos;
76 if (curPos) {
77 bool terminated = m_styleText[curPos] == ';' || (m_styleText[curPos] == '/' && m_styleText[curPos - 1] == '*');
78 if (!terminated) {
79 // Prepend a ";" to the property text if appending to a style declaration where
80 // the last property has no trailing ";".
81 textToSet.insert(";", 0);
82 formattingPrependOffset = 1;
83 }
84 }
85 }
86 }
87
88 const String& formatLineFeed = m_format.first;
89 const String& formatPropertyPrefix = m_format.second;
90 if (insertLastInSource) {
91 long formatPropertyPrefixLength = formatPropertyPrefix.length();
92 if (!formattingPrependOffset && (propertyStart < formatPropertyPrefixLength || m_styleText.substring(propertyStart - formatPropertyPrefixLength, formatPropertyPrefixLength) != formatPropertyPrefix)) {
93 textToSet.insert(formatPropertyPrefix, formattingPrependOffset);
94 if (!propertyStart || !isHTMLLineBreak(m_styleText[propertyStart - 1]))
95 textToSet.insert(formatLineFeed, formattingPrependOffset);
96 }
97 if (!isHTMLLineBreak(m_styleText[propertyStart]))
98 textToSet = textToSet + formatLineFeed;
99 } else {
100 String fullPrefix = formatLineFeed + formatPropertyPrefix;
101 long fullPrefixLength = fullPrefix.length();
102 textToSet = textToSet + fullPrefix;
103 if (insertFirstInSource && (propertyStart < fullPrefixLength || m_styleText.substring(propertyStart - fullPrefixLength, fullPrefixLength) != fullPrefix))
104 textToSet.insert(fullPrefix, formattingPrependOffset);
105 }
106 m_styleText.insert(textToSet, propertyStart);
107 }
108
replaceProperty(unsigned index,const String & newText)109 void InspectorStyleTextEditor::replaceProperty(unsigned index, const String& newText)
110 {
111 ASSERT_WITH_SECURITY_IMPLICATION(index < m_allProperties->size());
112 internalReplaceProperty(m_allProperties->at(index), newText);
113 }
114
internalReplaceProperty(const InspectorStyleProperty & property,const String & newText)115 void InspectorStyleTextEditor::internalReplaceProperty(const InspectorStyleProperty& property, const String& newText)
116 {
117 const SourceRange& range = property.sourceData.range;
118 long replaceRangeStart = range.start - m_styleRange.start;
119 long replaceRangeEnd = range.end - m_styleRange.start;
120 long newTextLength = newText.length();
121 String finalNewText = newText;
122
123 // Removing a property - remove preceding prefix.
124 String fullPrefix = m_format.first + m_format.second;
125 long fullPrefixLength = fullPrefix.length();
126 if (!newTextLength && fullPrefixLength) {
127 if (replaceRangeStart >= fullPrefixLength && m_styleText.substring(replaceRangeStart - fullPrefixLength, fullPrefixLength) == fullPrefix)
128 replaceRangeStart -= fullPrefixLength;
129 } else if (newTextLength) {
130 if (isHTMLLineBreak(newText[newTextLength - 1])) {
131 // Coalesce newlines of the original and new property values (to avoid a lot of blank lines while incrementally applying property values).
132 bool foundNewline = false;
133 bool isLastNewline = false;
134 int i;
135 int textLength = m_styleText.length();
136 for (i = replaceRangeEnd; i < textLength && isSpaceOrNewline(m_styleText[i]); ++i) {
137 isLastNewline = isHTMLLineBreak(m_styleText[i]);
138 if (isLastNewline)
139 foundNewline = true;
140 else if (foundNewline && !isLastNewline) {
141 replaceRangeEnd = i;
142 break;
143 }
144 }
145 if (foundNewline && isLastNewline)
146 replaceRangeEnd = i;
147 }
148
149 if (fullPrefixLength > replaceRangeStart || m_styleText.substring(replaceRangeStart - fullPrefixLength, fullPrefixLength) != fullPrefix)
150 finalNewText.insert(fullPrefix, 0);
151 }
152
153 int replacedLength = replaceRangeEnd - replaceRangeStart;
154 m_styleText.replace(replaceRangeStart, replacedLength, finalNewText);
155 }
156
157 } // namespace blink
158
159