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/*
* Copyright (C) 2015 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 UIScriptContext_h
#define UIScriptContext_h
#include <JavaScriptCore/JSRetainPtr.h>
#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
namespace WTR {
class UIScriptController;
class UIScriptContextDelegate {
public:
virtual void uiScriptDidComplete(WKStringRef result, unsigned callbackID) = 0;
};
const unsigned firstNonPersistentCallbackID = 1000;
typedef enum {
CallbackTypeWillBeginZooming = 0,
CallbackTypeDidEndZooming,
CallbackTypeDidShowKeyboard,
CallbackTypeDidHideKeyboard,
CallbackTypeDidEndScrolling,
CallbackTypeNonPersistent = firstNonPersistentCallbackID
} CallbackType;
class UIScriptContext {
WTF_MAKE_NONCOPYABLE(UIScriptContext);
public:
UIScriptContext(UIScriptContextDelegate&);
~UIScriptContext();
void runUIScript(WKStringRef script, unsigned scriptCallbackID);
void requestUIScriptCompletion(JSStringRef);
// For one-shot tasks callbacks.
unsigned prepareForAsyncTask(JSValueRef taskCallback, CallbackType);
void asyncTaskComplete(unsigned taskCallbackID);
// For persistent callbacks.
unsigned registerCallback(JSValueRef taskCallback, CallbackType);
JSValueRef callbackWithID(unsigned callbackID);
void unregisterCallback(unsigned callbackID);
void fireCallback(unsigned callbackID);
unsigned nextTaskCallbackID(CallbackType);
JSObjectRef objectFromRect(const WKRect&) const;
private:
JSRetainPtr<JSGlobalContextRef> m_context;
bool hasOutstandingAsyncTasks() const { return !m_callbacks.isEmpty(); }
bool currentParentCallbackIsPendingCompletion() const { return m_uiScriptResultsPendingCompletion.contains(m_currentScriptCallbackID); }
bool currentParentCallbackHasOutstandingAsyncTasks() const;
void tryToCompleteUIScriptForCurrentParentCallback();
struct Task {
unsigned parentScriptCallbackID { 0 };
JSValueRef callback { nullptr };
};
HashMap<unsigned, Task> m_callbacks;
HashMap<unsigned, JSStringRef> m_uiScriptResultsPendingCompletion;
UIScriptContextDelegate& m_delegate;
RefPtr<UIScriptController> m_controller;
unsigned m_currentScriptCallbackID { 0 };
unsigned m_nextTaskCallbackID { 0 };
};
}
#endif // UIScriptContext_h
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