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      1 /*
      2  * Copyright (c) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "PageScriptDebugServer.h"
     33 
     34 #if ENABLE(JAVASCRIPT_DEBUGGER)
     35 
     36 #include "Frame.h"
     37 #include "Page.h"
     38 #include "ScriptDebugListener.h"
     39 #include "V8Binding.h"
     40 #include "V8DOMWindow.h"
     41 #include "V8Proxy.h"
     42 #include <wtf/OwnPtr.h>
     43 #include <wtf/PassOwnPtr.h>
     44 #include <wtf/StdLibExtras.h>
     45 
     46 namespace WebCore {
     47 
     48 static Frame* retrieveFrame(v8::Handle<v8::Context> context)
     49 {
     50     if (context.IsEmpty())
     51         return 0;
     52 
     53     // Test that context has associated global dom window object.
     54     v8::Handle<v8::Object> global = context->Global();
     55     if (global.IsEmpty())
     56         return 0;
     57 
     58     global = V8DOMWrapper::lookupDOMWrapper(V8DOMWindow::GetTemplate(), global);
     59     if (global.IsEmpty())
     60         return 0;
     61 
     62     return V8Proxy::retrieveFrame(context);
     63 }
     64 
     65 PageScriptDebugServer& PageScriptDebugServer::shared()
     66 {
     67     DEFINE_STATIC_LOCAL(PageScriptDebugServer, server, ());
     68     return server;
     69 }
     70 
     71 PageScriptDebugServer::PageScriptDebugServer()
     72     : ScriptDebugServer()
     73     , m_pausedPage(0)
     74     , m_enabled(true)
     75 {
     76 }
     77 
     78 void PageScriptDebugServer::addListener(ScriptDebugListener* listener, Page* page)
     79 {
     80     if (!m_enabled)
     81         return;
     82 
     83     V8Proxy* proxy = V8Proxy::retrieve(page->mainFrame());
     84     if (!proxy)
     85         return;
     86 
     87     v8::HandleScope scope;
     88     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
     89     v8::Context::Scope contextScope(debuggerContext);
     90 
     91     if (!m_listenersMap.size()) {
     92         ensureDebuggerScriptCompiled();
     93         ASSERT(!m_debuggerScript.get()->IsUndefined());
     94         v8::Debug::SetDebugEventListener2(&PageScriptDebugServer::v8DebugEventCallback, v8::External::New(this));
     95     }
     96     m_listenersMap.set(page, listener);
     97 
     98     V8DOMWindowShell* shell = proxy->windowShell();
     99     if (!shell->isContextInitialized())
    100         return;
    101     v8::Handle<v8::Context> context = shell->context();
    102     v8::Handle<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.get()->Get(v8::String::New("getScripts")));
    103     v8::Handle<v8::Value> argv[] = { context->GetData() };
    104     v8::Handle<v8::Value> value = getScriptsFunction->Call(m_debuggerScript.get(), 1, argv);
    105     if (value.IsEmpty())
    106         return;
    107     ASSERT(!value->IsUndefined() && value->IsArray());
    108     v8::Handle<v8::Array> scriptsArray = v8::Handle<v8::Array>::Cast(value);
    109     for (unsigned i = 0; i < scriptsArray->Length(); ++i)
    110         dispatchDidParseSource(listener, v8::Handle<v8::Object>::Cast(scriptsArray->Get(v8::Integer::New(i))));
    111 }
    112 
    113 void PageScriptDebugServer::removeListener(ScriptDebugListener* listener, Page* page)
    114 {
    115     if (!m_listenersMap.contains(page))
    116         return;
    117 
    118     if (m_pausedPage == page)
    119         continueProgram();
    120 
    121     m_listenersMap.remove(page);
    122 
    123     if (m_listenersMap.isEmpty())
    124         v8::Debug::SetDebugEventListener(0);
    125     // FIXME: Remove all breakpoints set by the agent.
    126 }
    127 
    128 void PageScriptDebugServer::setClientMessageLoop(PassOwnPtr<ClientMessageLoop> clientMessageLoop)
    129 {
    130     m_clientMessageLoop = clientMessageLoop;
    131 }
    132 
    133 ScriptDebugListener* PageScriptDebugServer::getDebugListenerForContext(v8::Handle<v8::Context> context)
    134 {
    135     v8::HandleScope scope;
    136     Frame* frame = retrieveFrame(context);
    137     if (!frame)
    138         return 0;
    139     return m_listenersMap.get(frame->page());
    140 }
    141 
    142 void PageScriptDebugServer::runMessageLoopOnPause(v8::Handle<v8::Context> context)
    143 {
    144     v8::HandleScope scope;
    145     Frame* frame = retrieveFrame(context);
    146     m_pausedPage = frame->page();
    147 
    148     // Wait for continue or step command.
    149     m_clientMessageLoop->run(m_pausedPage);
    150 
    151     // The listener may have been removed in the nested loop.
    152     if (ScriptDebugListener* listener = m_listenersMap.get(m_pausedPage))
    153         listener->didContinue();
    154 
    155     m_pausedPage = 0;
    156 }
    157 
    158 void PageScriptDebugServer::quitMessageLoopOnPause()
    159 {
    160     m_clientMessageLoop->quitNow();
    161 }
    162 
    163 } // namespace WebCore
    164 
    165 #endif // ENABLE(JAVASCRIPT_DEBUGGER)
    166