11e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)/* 21e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * Copyright (C) 2013 Google Inc. All rights reserved. 31e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * 41e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * Redistribution and use in source and binary forms, with or without 51e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * modification, are permitted provided that the following conditions are 61e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * met: 71e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * 81e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * * Redistributions of source code must retain the above copyright 91e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * notice, this list of conditions and the following disclaimer. 101e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * * Redistributions in binary form must reproduce the above 111e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * copyright notice, this list of conditions and the following disclaimer 121e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * in the documentation and/or other materials provided with the 131e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * distribution. 141e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * * Neither the name of Google Inc. nor the names of its 151e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * contributors may be used to endorse or promote products derived from 161e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * this software without specific prior written permission. 171e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * 181e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 191e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 201e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 211e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 221e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 231e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 241e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 251e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 261e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 271e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 281e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 291e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) */ 301e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 311e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "config.h" 321e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/dom/CSSSelectorWatch.h" 331e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 3409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "core/css/parser/BisonCSSParser.h" 351e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/css/CSSSelectorList.h" 361e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/css/StylePropertySet.h" 371e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/dom/Document.h" 381e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/dom/ExecutionContext.h" 39d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#include "core/frame/LocalFrame.h" 401e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/loader/FrameLoaderClient.h" 411e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/rendering/style/StyleRareNonInheritedData.h" 421e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 431e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)namespace WebCore { 441e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 451e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)// The address of this string is important; its value is just documentation. 461e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)static const char kSupplementName[] = "CSSSelectorWatch"; 471e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 481e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)CSSSelectorWatch::CSSSelectorWatch(Document& document) 491e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) : m_document(document) 501e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) , m_callbackSelectorChangeTimer(this, &CSSSelectorWatch::callbackSelectorChangeTimerFired) 511e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) , m_timerExpirations(0) 521e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles){ 531e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} 541e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 551e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)CSSSelectorWatch& CSSSelectorWatch::from(Document& document) 561e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles){ 57d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) CSSSelectorWatch* watch = static_cast<CSSSelectorWatch*>(DocumentSupplement::from(document, kSupplementName)); 581e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (!watch) { 591e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) watch = new CSSSelectorWatch(document); 60f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu DocumentSupplement::provideTo(document, kSupplementName, adoptPtrWillBeNoop(watch)); 611e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 621e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) return *watch; 631e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} 641e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 651e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)void CSSSelectorWatch::callbackSelectorChangeTimerFired(Timer<CSSSelectorWatch>*) 661e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles){ 671e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) // Should be ensured by updateSelectorMatches(): 681e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) ASSERT(!m_addedSelectors.isEmpty() || !m_removedSelectors.isEmpty()); 691e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 701e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (m_timerExpirations < 1) { 711e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_timerExpirations++; 72d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) m_callbackSelectorChangeTimer.startOneShot(0, FROM_HERE); 731e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) return; 741e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 751e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (m_document.frame()) { 761e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) Vector<String> addedSelectors; 771e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) Vector<String> removedSelectors; 781e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) copyToVector(m_addedSelectors, addedSelectors); 791e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) copyToVector(m_removedSelectors, removedSelectors); 80f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_document.frame()->loader().client()->selectorMatchChanged(addedSelectors, removedSelectors); 811e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 821e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_addedSelectors.clear(); 831e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_removedSelectors.clear(); 841e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_timerExpirations = 0; 851e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} 861e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 871e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)void CSSSelectorWatch::updateSelectorMatches(const Vector<String>& removedSelectors, const Vector<String>& addedSelectors) 881e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles){ 891e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) bool shouldUpdateTimer = false; 901e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 911e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) for (unsigned i = 0; i < removedSelectors.size(); ++i) { 921e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) const String& selector = removedSelectors[i]; 9351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (!m_matchingCallbackSelectors.remove(selector)) 941e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) continue; 9551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 9651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // Count reached 0. 9751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) shouldUpdateTimer = true; 9851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (m_addedSelectors.contains(selector)) 9951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) m_addedSelectors.remove(selector); 10051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) else 10151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) m_removedSelectors.add(selector); 1021e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 1031e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1041e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) for (unsigned i = 0; i < addedSelectors.size(); ++i) { 1051e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) const String& selector = addedSelectors[i]; 10651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) HashCountedSet<String>::AddResult result = m_matchingCallbackSelectors.add(selector); 10751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (!result.isNewEntry) 1081e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) continue; 1091e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 11051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) shouldUpdateTimer = true; 1111e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (m_removedSelectors.contains(selector)) 1121e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_removedSelectors.remove(selector); 1131e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) else 1141e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_addedSelectors.add(selector); 1151e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 1161e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1171e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (!shouldUpdateTimer) 1181e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) return; 1191e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1201e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (m_removedSelectors.isEmpty() && m_addedSelectors.isEmpty()) { 1211e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (m_callbackSelectorChangeTimer.isActive()) { 1221e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_timerExpirations = 0; 1231e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_callbackSelectorChangeTimer.stop(); 1241e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 1251e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } else { 1261e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_timerExpirations = 0; 1271e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (!m_callbackSelectorChangeTimer.isActive()) 128d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) m_callbackSelectorChangeTimer.startOneShot(0, FROM_HERE); 1291e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 1301e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} 1311e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1321e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)static bool allCompound(const CSSSelectorList& selectorList) 1331e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles){ 13409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) for (const CSSSelector* selector = selectorList.first(); selector; selector = selectorList.next(*selector)) { 1351e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (!selector->isCompound()) 1361e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) return false; 1371e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 1381e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) return true; 1391e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} 1401e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1411e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)void CSSSelectorWatch::watchCSSSelectors(const Vector<String>& selectors) 1421e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles){ 1431e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_watchedCallbackSelectors.clear(); 14409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) BisonCSSParser parser(CSSParserContext(UASheetMode, 0)); 1451e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1461e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) const CSSProperty callbackProperty(CSSPropertyInternalCallback, CSSPrimitiveValue::createIdentifier(CSSValueInternalPresence)); 1471e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) const RefPtr<StylePropertySet> callbackPropertySet = ImmutableStylePropertySet::create(&callbackProperty, 1, UASheetMode); 1481e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1491e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) CSSSelectorList selectorList; 1501e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) for (unsigned i = 0; i < selectors.size(); ++i) { 1511e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) parser.parseSelector(selectors[i], selectorList); 1521e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (!selectorList.isValid()) 1531e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) continue; 1541e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 1551e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) // Only accept Compound Selectors, since they're cheaper to match. 1561e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) if (!allCompound(selectorList)) 1571e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) continue; 1581e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 159d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) RefPtrWillBeRawPtr<StyleRule> rule = StyleRule::create(); 1601e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) rule->wrapperAdoptSelectorList(selectorList); 1611e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) rule->setProperties(callbackPropertySet); 1621e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_watchedCallbackSelectors.append(rule.release()); 1631e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) } 1641e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) m_document.changedSelectorWatch(); 1651e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} 1661e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) 167f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liuvoid CSSSelectorWatch::trace(Visitor* visitor) 168f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu{ 169f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu visitor->trace(m_watchedCallbackSelectors); 170323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) DocumentSupplement::trace(visitor); 171f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu} 172f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu 1731e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)} // namespace WebCore 174