1 /* 2 * Copyright (C) 2009 Google Inc. All Rights Reserved. 3 * (C) 2008 Apple Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 #include "StorageAreaProxy.h" 29 30 #if ENABLE(DOM_STORAGE) 31 32 #include "DOMWindow.h" 33 #include "Document.h" 34 #include "EventNames.h" 35 #include "ExceptionCode.h" 36 #include "Frame.h" 37 #include "Page.h" 38 #include "PageGroup.h" 39 #include "SecurityOrigin.h" 40 #include "StorageAreaImpl.h" 41 #include "StorageEvent.h" 42 43 #include "WebFrameImpl.h" 44 #include "WebStorageArea.h" 45 #include "WebString.h" 46 #include "WebURL.h" 47 48 namespace WebCore { 49 50 StorageAreaProxy::StorageAreaProxy(WebKit::WebStorageArea* storageArea, StorageType storageType) 51 : m_storageArea(storageArea) 52 , m_storageType(storageType) 53 { 54 } 55 56 StorageAreaProxy::~StorageAreaProxy() 57 { 58 } 59 60 unsigned StorageAreaProxy::length() const 61 { 62 return m_storageArea->length(); 63 } 64 65 String StorageAreaProxy::key(unsigned index) const 66 { 67 return m_storageArea->key(index); 68 } 69 70 String StorageAreaProxy::getItem(const String& key) const 71 { 72 return m_storageArea->getItem(key); 73 } 74 75 String StorageAreaProxy::setItem(const String& key, const String& value, ExceptionCode& ec, Frame* frame) 76 { 77 WebKit::WebStorageArea::Result result = WebKit::WebStorageArea::ResultOK; 78 WebKit::WebString oldValue; 79 WebKit::WebFrame* webFrame = WebKit::WebFrameImpl::fromFrame(frame); 80 m_storageArea->setItem(key, value, frame->document()->url(), result, oldValue, webFrame); 81 ec = (result == WebKit::WebStorageArea::ResultOK) ? 0 : QUOTA_EXCEEDED_ERR; 82 String oldValueString = oldValue; 83 if (oldValueString != value && result == WebKit::WebStorageArea::ResultOK) 84 storageEvent(key, oldValue, value, m_storageType, frame->document()->securityOrigin(), frame); 85 return oldValue; 86 } 87 88 String StorageAreaProxy::removeItem(const String& key, Frame* frame) 89 { 90 WebKit::WebString oldValue; 91 m_storageArea->removeItem(key, frame->document()->url(), oldValue); 92 if (!oldValue.isNull()) 93 storageEvent(key, oldValue, String(), m_storageType, frame->document()->securityOrigin(), frame); 94 return oldValue; 95 } 96 97 bool StorageAreaProxy::clear(Frame* frame) 98 { 99 bool clearedSomething; 100 m_storageArea->clear(frame->document()->url(), clearedSomething); 101 if (clearedSomething) 102 storageEvent(String(), String(), String(), m_storageType, frame->document()->securityOrigin(), frame); 103 return clearedSomething; 104 } 105 106 bool StorageAreaProxy::contains(const String& key) const 107 { 108 return !getItem(key).isNull(); 109 } 110 111 // Copied from WebCore/storage/StorageEventDispatcher.cpp out of necessity. It's probably best to keep it current. 112 void StorageAreaProxy::storageEvent(const String& key, const String& oldValue, const String& newValue, StorageType storageType, SecurityOrigin* securityOrigin, Frame* sourceFrame) 113 { 114 Page* page = sourceFrame->page(); 115 if (!page) 116 return; 117 118 // We need to copy all relevant frames from every page to a vector since sending the event to one frame might mutate the frame tree 119 // of any given page in the group or mutate the page group itself. 120 Vector<RefPtr<Frame> > frames; 121 if (storageType == SessionStorage) { 122 // Send events only to our page. 123 for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) { 124 if (sourceFrame != frame && frame->document()->securityOrigin()->equal(securityOrigin)) 125 frames.append(frame); 126 } 127 128 for (unsigned i = 0; i < frames.size(); ++i) { 129 ExceptionCode ec = 0; 130 Storage* storage = frames[i]->domWindow()->sessionStorage(ec); 131 if (!ec) 132 frames[i]->document()->enqueueWindowEvent(StorageEvent::create(eventNames().storageEvent, key, oldValue, newValue, sourceFrame->document()->url(), storage)); 133 } 134 } else { 135 // Send events to every page. 136 const HashSet<Page*>& pages = page->group().pages(); 137 HashSet<Page*>::const_iterator end = pages.end(); 138 for (HashSet<Page*>::const_iterator it = pages.begin(); it != end; ++it) { 139 for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree()->traverseNext()) { 140 if (sourceFrame != frame && frame->document()->securityOrigin()->equal(securityOrigin)) 141 frames.append(frame); 142 } 143 } 144 145 for (unsigned i = 0; i < frames.size(); ++i) { 146 ExceptionCode ec = 0; 147 Storage* storage = frames[i]->domWindow()->localStorage(ec); 148 if (!ec) 149 frames[i]->document()->enqueueWindowEvent(StorageEvent::create(eventNames().storageEvent, key, oldValue, newValue, sourceFrame->document()->url(), storage)); 150 } 151 } 152 } 153 154 } // namespace WebCore 155 156 #endif // ENABLE(DOM_STORAGE) 157