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      1 /*
      2  * Copyright (c) 2008, Google Inc. All rights reserved.
      3  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include "config.h"
     33 #include "ScriptCachedFrameData.h"
     34 
     35 #include "Frame.h"
     36 #include "GCController.h"
     37 #include "Page.h"
     38 #include "PageGroup.h"
     39 #include <runtime/JSLock.h>
     40 #include "ScriptController.h"
     41 
     42 using namespace JSC;
     43 
     44 namespace WebCore {
     45 
     46 ScriptCachedFrameData::ScriptCachedFrameData(Frame* frame)
     47     : m_domWindow(0)
     48 {
     49     JSLock lock(SilenceAssertionsOnly);
     50 
     51     ScriptController* scriptController = frame->script();
     52     ScriptController::ShellMap& windowShells = scriptController->m_windowShells;
     53 
     54     ScriptController::ShellMap::iterator windowShellsEnd = windowShells.end();
     55     for (ScriptController::ShellMap::iterator iter = windowShells.begin(); iter != windowShellsEnd; ++iter) {
     56         JSDOMWindow* window = iter->second->window();
     57         m_windows.add(iter->first.get(), Strong<JSDOMWindow>(window->globalData(), window));
     58         m_domWindow = window->impl();
     59     }
     60 
     61     scriptController->attachDebugger(0);
     62 }
     63 
     64 DOMWindow* ScriptCachedFrameData::domWindow() const
     65 {
     66     return m_domWindow;
     67 }
     68 
     69 ScriptCachedFrameData::~ScriptCachedFrameData()
     70 {
     71     clear();
     72 }
     73 
     74 void ScriptCachedFrameData::restore(Frame* frame)
     75 {
     76     JSLock lock(SilenceAssertionsOnly);
     77 
     78     ScriptController* scriptController = frame->script();
     79     ScriptController::ShellMap& windowShells = scriptController->m_windowShells;
     80 
     81     ScriptController::ShellMap::iterator windowShellsEnd = windowShells.end();
     82     for (ScriptController::ShellMap::iterator iter = windowShells.begin(); iter != windowShellsEnd; ++iter) {
     83         DOMWrapperWorld* world = iter->first.get();
     84         JSDOMWindowShell* windowShell = iter->second.get();
     85 
     86         if (JSDOMWindow* window = m_windows.get(world).get())
     87             windowShell->setWindow(window->globalData(), window);
     88         else {
     89             windowShell->setWindow(frame->domWindow());
     90 
     91             if (Page* page = frame->page()) {
     92                 scriptController->attachDebugger(windowShell, page->debugger());
     93                 windowShell->window()->setProfileGroup(page->group().identifier());
     94             }
     95         }
     96     }
     97 }
     98 
     99 void ScriptCachedFrameData::clear()
    100 {
    101     if (m_windows.isEmpty())
    102         return;
    103 
    104     JSLock lock(SilenceAssertionsOnly);
    105     m_windows.clear();
    106     gcController().garbageCollectSoon();
    107 }
    108 
    109 } // namespace WebCore
    110