Move parts of npruntime into the WebKit API so it no longer has any dependencies on WebCore.

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/160091

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@21516 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 252 insertions, 0 deletions

diff --git a/webkit/api/public/WebBindings.h b/webkit/api/public/WebBindings.h
new file mode 100644
index 0000000..f6eeb7d
--- /dev/null
+++ b/webkit/api/public/WebBindings.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2009 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 WebBindings_h
+#define WebBindings_h
+
+#include <bindings/npruntime.h>
+#include "WebCommon.h"
+
+namespace WebKit {
+
+    class WebDragData;
+
+    // A haphazard collection of functions for dealing with plugins.
+    class WebBindings {
+    public:
+        // NPN Functions ------------------------------------------------------
+        // These are all defined in npruntime.h and are well documented.
+
+        // NPN_GetStringIdentifier
+        WEBKIT_API static NPIdentifier getStringIdentifier(const NPUTF8*);
+
+        // NPN_GetIntIdentifier
+        WEBKIT_API static NPIdentifier getIntIdentifier(int32_t);
+
+
+        // Miscellaneous utility functions ------------------------------------
+
+        // Complement to NPN_Get___Identifier functions.  Extracts data from the NPIdentifier data
+        // structure.  If isString is true upon return, string will be set but number's value is
+        // undefined.  If iString is false, the opposite is true.
+        WEBKIT_API static void extractIdentifierData(const NPIdentifier&, const NPUTF8*& string, int32_t& number, bool& isString);
+
+        // Return true (success) if the given npobj is the current drag event in browser dispatch,
+        // and is accessible based on context execution frames and their security origins and
+        // WebKit clipboard access policy. If so, return the event id and the clipboard data (WebDragData).
+        // This only works with V8.  If compiled without V8, it'll always return false.
+        WEBKIT_API static bool getDragData(NPObject* event, int* event_id, WebDragData* data);
+
+        // Invoke the event access policy checks listed above with GetDragData().  No need for clipboard
+        // data or event_id outputs, just confirm the given npobj is the current & accessible drag event.
+        // This only works with V8.  If compiled without V8, it'll always return false.
+        WEBKIT_API static bool isDragEvent(NPObject* event);
+    };
+
+} // namespace WebKit
+
+#endif
diff --git a/webkit/api/src/WebBindings.cpp b/webkit/api/src/WebBindings.cpp
new file mode 100644
index 0000000..d6ee73d
--- /dev/null
+++ b/webkit/api/src/WebBindings.cpp
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2009 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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.
+ */
+
+#include "config.h"
+#include "WebBindings.h"
+
+#include "npruntime_priv.h"
+#include "webkit/api/public/WebDragData.h"
+
+#if USE(V8_BINDING)
+#include "ChromiumDataObject.h"
+#include "ClipboardChromium.h"
+#include "EventNames.h"
+#include "MouseEvent.h"
+#include "NPV8Object.h"  // for PrivateIdentifier
+#include "V8Helpers.h"
+#include "V8Proxy.h"
+#elif USE(JAVASCRIPTCORE_BINDINGS)
+#include "bridge/c/c_utility.h"
+#endif
+
+#if USE(JAVASCRIPTCORE_BINDINGS)
+using JSC::Bindings::PrivateIdentifier;
+#endif
+
+using namespace WebCore;
+
+namespace WebKit {
+
+void WebBindings::extractIdentifierData(const NPIdentifier& identifier, const NPUTF8*& string, int32_t& number, bool& isString)
+{
+    PrivateIdentifier* priv = static_cast<PrivateIdentifier*>(identifier);
+    if (!priv) {
+        isString = false;
+        number = 0;
+        return;
+    }
+
+    isString = priv->isString;
+    if (isString)
+        string = priv->value.string;
+    else
+        number = priv->value.number;
+}
+
+NPIdentifier WebBindings::getStringIdentifier(const NPUTF8* string)
+{
+    return NPN_GetStringIdentifier(string);
+}
+
+NPIdentifier WebBindings::getIntIdentifier(int32_t number)
+{
+    return NPN_GetIntIdentifier(number);
+}
+
+#if USE(V8)
+
+static v8::Local<v8::Value> getEvent(const v8::Handle<v8::Context>& context)
+{
+    static v8::Persistent<v8::String> event(v8::Persistent<v8::String>::New(v8::String::NewSymbol("event")));
+    return context->Global()->GetHiddenValue(event);
+}
+
+static bool getDragDataImpl(NPObject* npobj, int* eventId, WebDragData* data)
+{
+    if (npobj == NULL)
+        return false;
+    if (npobj->_class != npScriptObjectClass)
+        return false;
+
+    v8::HandleScope handleScope;
+    v8::Handle<v8::Context> context = v8::Context::GetEntered();
+    if (context.IsEmpty())
+        return false;
+
+    // Get the current WebCore event.
+    v8::Handle<v8::Value> currentEvent(getEvent(context));
+    Event* event = V8DOMWrapper::convertToNativeEvent(currentEvent);
+    if (event == NULL)
+        return false;
+
+    // Check that the given npobj is that event.
+    V8NPObject* object = reinterpret_cast<V8NPObject*>(npobj);
+    Event* given = V8DOMWrapper::convertToNativeEvent(object->v8Object);
+    if (given != event)
+        return false;
+
+    // Check the execution frames are same origin.
+    V8Proxy* current = V8Proxy::retrieve(V8Proxy::retrieveFrame());
+    Frame* frame = V8Proxy::retrieveFrame(context);
+    if (!current || !current->canAccessFrame(frame, false))
+        return false;
+
+    const EventNames& names(eventNames());
+    const AtomicString& eventType(event->type());
+
+    enum DragTargetMouseEventId {
+        DragEnterId = 1, DragOverId = 2, DragLeaveId = 3, DropId = 4
+    };
+
+    // The event type should be a drag event.
+    if (eventType == names.dragenterEvent)
+        *eventId = DragEnterId;
+    else if (eventType == names.dragoverEvent)
+        *eventId = DragOverId;
+    else if (eventType == names.dragleaveEvent)
+        *eventId = DragLeaveId;
+    else if (eventType == names.dropEvent)
+        *eventId = DropId;
+    else
+        return false;
+
+    // Drag events are mouse events and should have a clipboard.
+    MouseEvent* me = reinterpret_cast<MouseEvent*>(event);
+    Clipboard* clipboard = me->clipboard();
+    if (!clipboard)
+        return false;
+
+    // And that clipboard should be accessible by WebKit policy.
+    ClipboardChromium* chrome = reinterpret_cast<ClipboardChromium*>(clipboard);
+    HashSet<String> accessible(chrome->types());
+    if (accessible.isEmpty())
+        return false;
+
+    RefPtr<ChromiumDataObject> dataObject(chrome->dataObject());
+    if (dataObject && data)
+        *data = WebDragData(dataObject);
+
+    return dataObject != NULL;
+}
+
+#endif
+
+bool WebBindings::getDragData(NPObject* event, int* eventId, WebDragData* data)
+{
+#if USE(V8)
+    return getDragDataImpl(event, eventId, data);
+#else
+    // Not supported on other ports (JSC, etc).
+    return false;
+#endif
+}
+
+bool WebBindings::isDragEvent(NPObject* event)
+{
+    int eventId;
+    return getDragData(event, &eventId, NULL);
+}
+
+} // namespace WebKit