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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC.
* OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/inspector/ContentSearchUtils.h"
#include "bindings/core/v8/ScriptRegexp.h"
#include "wtf/Vector.h"
#include "wtf/text/StringBuilder.h"
namespace blink {
namespace ContentSearchUtils {
namespace {
// This should be kept the same as the one in front-end/utilities.js
static const char regexSpecialCharacters[] = "[](){}+-*.,?\\^$|";
}
static String createSearchRegexSource(const String& text)
{
StringBuilder result;
String specials(regexSpecialCharacters);
for (unsigned i = 0; i < text.length(); i++) {
if (specials.find(text[i]) != kNotFound)
result.append('\\');
result.append(text[i]);
}
return result.toString();
}
static Vector<pair<int, String> > getScriptRegexpMatchesByLines(const ScriptRegexp* regex, const String& text)
{
Vector<pair<int, String> > result;
if (text.isEmpty())
return result;
OwnPtr<Vector<unsigned> > endings(lineEndings(text));
unsigned size = endings->size();
unsigned start = 0;
for (unsigned lineNumber = 0; lineNumber < size; ++lineNumber) {
unsigned lineEnd = endings->at(lineNumber);
String line = text.substring(start, lineEnd - start);
if (line.endsWith('\r'))
line = line.left(line.length() - 1);
int matchLength;
if (regex->match(line, 0, &matchLength) != -1)
result.append(pair<int, String>(lineNumber, line));
start = lineEnd + 1;
}
return result;
}
static PassRefPtr<TypeBuilder::Page::SearchMatch> buildObjectForSearchMatch(int lineNumber, const String& lineContent)
{
return TypeBuilder::Page::SearchMatch::create()
.setLineNumber(lineNumber)
.setLineContent(lineContent)
.release();
}
PassOwnPtr<ScriptRegexp> createSearchRegex(const String& query, bool caseSensitive, bool isRegex)
{
String regexSource = isRegex ? query : createSearchRegexSource(query);
return adoptPtr(new ScriptRegexp(regexSource, caseSensitive ? TextCaseSensitive : TextCaseInsensitive));
}
PassRefPtr<TypeBuilder::Array<TypeBuilder::Page::SearchMatch> > searchInTextByLines(const String& text, const String& query, const bool caseSensitive, const bool isRegex)
{
RefPtr<TypeBuilder::Array<TypeBuilder::Page::SearchMatch> > result = TypeBuilder::Array<TypeBuilder::Page::SearchMatch>::create();
OwnPtr<ScriptRegexp> regex = ContentSearchUtils::createSearchRegex(query, caseSensitive, isRegex);
Vector<pair<int, String> > matches = getScriptRegexpMatchesByLines(regex.get(), text);
for (const auto& match : matches)
result->addItem(buildObjectForSearchMatch(match.first, match.second));
return result;
}
static String findMagicComment(const String& content, const String& name, MagicCommentType commentType, bool* deprecated = 0)
{
ASSERT(name.find("=") == kNotFound);
if (deprecated)
*deprecated = false;
unsigned length = content.length();
unsigned nameLength = name.length();
size_t pos = length;
size_t equalSignPos = 0;
size_t closingCommentPos = 0;
while (true) {
pos = content.reverseFind(name, pos);
if (pos == kNotFound)
return String();
// Check for a /\/[\/*][@#][ \t]/ regexp (length of 4) before found name.
if (pos < 4)
return String();
pos -= 4;
if (content[pos] != '/')
continue;
if ((content[pos + 1] != '/' || commentType != JavaScriptMagicComment)
&& (content[pos + 1] != '*' || commentType != CSSMagicComment))
continue;
if (content[pos + 2] != '#' && content[pos + 2] != '@')
continue;
if (content[pos + 3] != ' ' && content[pos + 3] != '\t')
continue;
equalSignPos = pos + 4 + nameLength;
if (equalSignPos < length && content[equalSignPos] != '=')
continue;
if (commentType == CSSMagicComment) {
closingCommentPos = content.find("*/", equalSignPos + 1);
if (closingCommentPos == kNotFound)
return String();
}
break;
}
if (deprecated && content[pos + 2] == '@')
*deprecated = true;
ASSERT(equalSignPos);
ASSERT(commentType != CSSMagicComment || closingCommentPos);
size_t urlPos = equalSignPos + 1;
String match = commentType == CSSMagicComment
? content.substring(urlPos, closingCommentPos - urlPos)
: content.substring(urlPos);
size_t newLine = match.find("\n");
if (newLine != kNotFound)
match = match.substring(0, newLine);
match = match.stripWhiteSpace();
String disallowedChars("\"' \t");
for (unsigned i = 0; i < match.length(); ++i) {
if (disallowedChars.find(match[i]) != kNotFound)
return "";
}
return match;
}
String findSourceURL(const String& content, MagicCommentType commentType, bool* deprecated)
{
return findMagicComment(content, "sourceURL", commentType, deprecated);
}
String findSourceMapURL(const String& content, MagicCommentType commentType, bool* deprecated)
{
return findMagicComment(content, "sourceMappingURL", commentType, deprecated);
}
} // namespace ContentSearchUtils
} // namespace blink
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