Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 210 insertions, 0 deletions

diff --git a/Source/WebKit2/UIProcess/GenericCallback.h b/Source/WebKit2/UIProcess/GenericCallback.h
new file mode 100644
index 000000000..b0d7b9b1c
--- /dev/null
+++ b/Source/WebKit2/UIProcess/GenericCallback.h
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2010 Apple 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.
+ */
+
+#ifndef GenericCallback_h
+#define GenericCallback_h
+
+#include "WKAPICast.h"
+
+#include "WebError.h"
+#include <wtf/HashMap.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebKit {
+
+class CallbackBase : public RefCounted<CallbackBase> {
+public:
+    virtual ~CallbackBase()
+    {
+    }
+
+    uint64_t callbackID() const { return m_callbackID; }
+
+protected:
+    CallbackBase(void* context)
+        : m_context(context)
+        , m_callbackID(generateCallbackID())
+    {
+    }
+
+    void* context() const { return m_context; }
+
+private:
+    static uint64_t generateCallbackID()
+    {
+        static uint64_t uniqueCallbackID = 1;
+        return uniqueCallbackID++;
+    }
+
+    void* m_context;
+    uint64_t m_callbackID;
+};
+
+class VoidCallback : public CallbackBase {
+public:
+    typedef void (*CallbackFunction)(WKErrorRef, void*);
+
+    static PassRefPtr<VoidCallback> create(void* context, CallbackFunction callback)
+    {
+        return adoptRef(new VoidCallback(context, callback));
+    }
+
+    virtual ~VoidCallback()
+    {
+        ASSERT(!m_callback);
+    }
+
+    void performCallback()
+    {
+        ASSERT(m_callback);
+
+        m_callback(0, context());
+
+        m_callback = 0;
+    }
+    
+    void invalidate()
+    {
+        ASSERT(m_callback);
+
+        RefPtr<WebError> error = WebError::create();
+        m_callback(toAPI(error.get()), context());
+        
+        m_callback = 0;
+    }
+
+private:
+    VoidCallback(void* context, CallbackFunction callback)
+        : CallbackBase(context)
+        , m_callback(callback)
+    {
+    }
+
+    CallbackFunction m_callback;
+};
+
+template<typename APIReturnValueType, typename InternalReturnValueType = typename APITypeInfo<APIReturnValueType>::ImplType>
+class GenericCallback : public CallbackBase {
+public:
+    typedef void (*CallbackFunction)(APIReturnValueType, WKErrorRef, void*);
+
+    static PassRefPtr<GenericCallback> create(void* context, CallbackFunction callback)
+    {
+        return adoptRef(new GenericCallback(context, callback));
+    }
+
+    virtual ~GenericCallback()
+    {
+        ASSERT(!m_callback);
+    }
+
+    void performCallbackWithReturnValue(InternalReturnValueType returnValue)
+    {
+        ASSERT(m_callback);
+
+        m_callback(toAPI(returnValue), 0, context());
+
+        m_callback = 0;
+    }
+    
+    void invalidate()
+    {
+        ASSERT(m_callback);
+
+        RefPtr<WebError> error = WebError::create();
+        m_callback(0, toAPI(error.get()), context());
+        
+        m_callback = 0;
+    }
+
+private:
+    GenericCallback(void* context, CallbackFunction callback)
+        : CallbackBase(context)
+        , m_callback(callback)
+    {
+    }
+
+    CallbackFunction m_callback;
+};
+
+// FIXME: Make a version of CallbackBase with two arguments, and define ComputedPagesCallback as a specialization.
+class ComputedPagesCallback : public CallbackBase {
+public:
+    typedef void (*CallbackFunction)(const Vector<WebCore::IntRect>&, double, WKErrorRef, void*);
+
+    static PassRefPtr<ComputedPagesCallback> create(void* context, CallbackFunction callback)
+    {
+        return adoptRef(new ComputedPagesCallback(context, callback));
+    }
+
+    virtual ~ComputedPagesCallback()
+    {
+        ASSERT(!m_callback);
+    }
+
+    void performCallbackWithReturnValue(const Vector<WebCore::IntRect>& returnValue1, double returnValue2)
+    {
+        ASSERT(m_callback);
+
+        m_callback(returnValue1, returnValue2, 0, context());
+
+        m_callback = 0;
+    }
+    
+    void invalidate()
+    {
+        ASSERT(m_callback);
+
+        RefPtr<WebError> error = WebError::create();
+        m_callback(Vector<WebCore::IntRect>(), 0, toAPI(error.get()), context());
+        
+        m_callback = 0;
+    }
+
+private:
+
+    ComputedPagesCallback(void* context, CallbackFunction callback)
+        : CallbackBase(context)
+        , m_callback(callback)
+    {
+    }
+
+    CallbackFunction m_callback;
+};
+
+template<typename T>
+void invalidateCallbackMap(HashMap<uint64_t, T>& map)
+{
+    Vector<T> callbacksVector;
+    copyValuesToVector(map, callbacksVector);
+    for (size_t i = 0, size = callbacksVector.size(); i < size; ++i)
+        callbacksVector[i]->invalidate();
+    map.clear();
+}
+
+} // namespace WebKit
+
+#endif // GenericCallback_h