| /* |
| * Copyright (C) 2010 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 APPLE 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 APPLE 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/dom/DOMTokenList.h" |
| |
| #include "bindings/v8/ExceptionMessages.h" |
| #include "bindings/v8/ExceptionState.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "core/html/parser/HTMLParserIdioms.h" |
| #include "wtf/text/StringBuilder.h" |
| |
| namespace WebCore { |
| |
| bool DOMTokenList::validateToken(const AtomicString& token, const char* method, ExceptionState& es) |
| { |
| if (token.isEmpty()) { |
| es.throwDOMException(SyntaxError, ExceptionMessages::failedToExecute(method, "DOMTokenList", "The token provided must not be empty.")); |
| return false; |
| } |
| |
| unsigned length = token.length(); |
| for (unsigned i = 0; i < length; ++i) { |
| if (isHTMLSpace<UChar>(token[i])) { |
| es.throwDOMException(InvalidCharacterError, ExceptionMessages::failedToExecute(method, "DOMTokenList", "The token provided ('" + token + "') contains HTML space characters, which are not valid in tokens.")); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool DOMTokenList::validateTokens(const Vector<String>& tokens, const char* method, ExceptionState& es) |
| { |
| for (size_t i = 0; i < tokens.size(); ++i) { |
| if (!validateToken(tokens[i], method, es)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool DOMTokenList::contains(const AtomicString& token, ExceptionState& es) const |
| { |
| if (!validateToken(token, "contains", es)) |
| return false; |
| return containsInternal(token); |
| } |
| |
| void DOMTokenList::add(const AtomicString& token, ExceptionState& es) |
| { |
| Vector<String> tokens; |
| tokens.append(token.string()); |
| add(tokens, es); |
| } |
| |
| void DOMTokenList::add(const Vector<String>& tokens, ExceptionState& es) |
| { |
| Vector<String> filteredTokens; |
| filteredTokens.reserveCapacity(tokens.size()); |
| for (size_t i = 0; i < tokens.size(); ++i) { |
| if (!validateToken(tokens[i], "add", es)) |
| return; |
| if (containsInternal(tokens[i])) |
| continue; |
| if (filteredTokens.contains(tokens[i])) |
| continue; |
| filteredTokens.append(tokens[i]); |
| } |
| |
| if (filteredTokens.isEmpty()) |
| return; |
| |
| setValue(addTokens(value(), filteredTokens)); |
| } |
| |
| void DOMTokenList::remove(const AtomicString& token, ExceptionState& es) |
| { |
| Vector<String> tokens; |
| tokens.append(token.string()); |
| remove(tokens, es); |
| } |
| |
| void DOMTokenList::remove(const Vector<String>& tokens, ExceptionState& es) |
| { |
| if (!validateTokens(tokens, "remove", es)) |
| return; |
| |
| // Check using containsInternal first since it is a lot faster than going |
| // through the string character by character. |
| bool found = false; |
| for (size_t i = 0; i < tokens.size(); ++i) { |
| if (containsInternal(tokens[i])) { |
| found = true; |
| break; |
| } |
| } |
| |
| if (found) |
| setValue(removeTokens(value(), tokens)); |
| } |
| |
| bool DOMTokenList::toggle(const AtomicString& token, ExceptionState& es) |
| { |
| if (!validateToken(token, "toggle", es)) |
| return false; |
| |
| if (containsInternal(token)) { |
| removeInternal(token); |
| return false; |
| } |
| addInternal(token); |
| return true; |
| } |
| |
| bool DOMTokenList::toggle(const AtomicString& token, bool force, ExceptionState& es) |
| { |
| if (!validateToken(token, "toggle", es)) |
| return false; |
| |
| if (force) |
| addInternal(token); |
| else |
| removeInternal(token); |
| |
| return force; |
| } |
| |
| void DOMTokenList::addInternal(const AtomicString& token) |
| { |
| if (!containsInternal(token)) |
| setValue(addToken(value(), token)); |
| } |
| |
| void DOMTokenList::removeInternal(const AtomicString& token) |
| { |
| // Check using contains first since it uses AtomicString comparisons instead |
| // of character by character testing. |
| if (!containsInternal(token)) |
| return; |
| setValue(removeToken(value(), token)); |
| } |
| |
| String DOMTokenList::addToken(const AtomicString& input, const AtomicString& token) |
| { |
| Vector<String> tokens; |
| tokens.append(token.string()); |
| return addTokens(input, tokens); |
| } |
| |
| String DOMTokenList::addTokens(const AtomicString& input, const Vector<String>& tokens) |
| { |
| bool needsSpace = false; |
| |
| StringBuilder builder; |
| if (!input.isEmpty()) { |
| builder.append(input); |
| needsSpace = !isHTMLSpace<UChar>(input[input.length() - 1]); |
| } |
| |
| for (size_t i = 0; i < tokens.size(); ++i) { |
| if (needsSpace) |
| builder.append(' '); |
| builder.append(tokens[i]); |
| needsSpace = true; |
| } |
| |
| return builder.toString(); |
| } |
| |
| String DOMTokenList::removeToken(const AtomicString& input, const AtomicString& token) |
| { |
| Vector<String> tokens; |
| tokens.append(token.string()); |
| return removeTokens(input, tokens); |
| } |
| |
| String DOMTokenList::removeTokens(const AtomicString& input, const Vector<String>& tokens) |
| { |
| // Algorithm defined at http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#remove-a-token-from-a-string |
| // New spec is at http://dom.spec.whatwg.org/#remove-a-token-from-a-string |
| |
| unsigned inputLength = input.length(); |
| StringBuilder output; // 3 |
| output.reserveCapacity(inputLength); |
| unsigned position = 0; // 4 |
| |
| // Step 5 |
| while (position < inputLength) { |
| if (isHTMLSpace<UChar>(input[position])) { // 6 |
| output.append(input[position++]); // 6.1, 6.2 |
| continue; // 6.3 |
| } |
| |
| // Step 7 |
| StringBuilder tokenBuilder; |
| while (position < inputLength && isNotHTMLSpace<UChar>(input[position])) |
| tokenBuilder.append(input[position++]); |
| |
| // Step 8 |
| String token = tokenBuilder.toString(); |
| if (tokens.contains(token)) { |
| // Step 8.1 |
| while (position < inputLength && isHTMLSpace<UChar>(input[position])) |
| ++position; |
| |
| // Step 8.2 |
| size_t j = output.length(); |
| while (j > 0 && isHTMLSpace<UChar>(output[j - 1])) |
| --j; |
| output.resize(j); |
| |
| // Step 8.3 |
| if (position < inputLength && !output.isEmpty()) |
| output.append(' '); |
| } else { |
| output.append(token); // Step 9 |
| } |
| } |
| |
| return output.toString(); |
| } |
| |
| } // namespace WebCore |