[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

third_party/WebKit/Source/WebKit/chromium/public/mac/WebTextHelper.h

Index: third_party/WebKit/Source/WebKit/chromium/public/mac/WebTextHelper.h
diff --git a/third_party/WebKit/Source/WebKit/chromium/public/mac/WebTextHelper.h b/third_party/WebKit/Source/WebKit/chromium/public/mac/WebTextHelper.h
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+/*
+ * Copyright (C) 2011 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 WebTextHelpers_h
+#define WebTextHelpers_h
+
+#include "../WebPrivateOwnPtr.h"
+
+namespace WebKit {
+class WebFrame;
+class WebRect;
+class WebString;
+class WebTextHelperImpl;
+}
+
+namespace WebKit {
+
+// This class is a helper for implementing part of the NSTextInput protocol on
+// the renderer side. In the future it should be generalized to support input
+// method composition across all platforms.
+class WebTextHelper {
+public:
+    explicit WebTextHelper(WebFrame* frame);
+    ~WebTextHelper();
+
+    // Returns the character index in the Frame's text stream over where the
+    // mouse pointer is. The coordinate is in WebKit's coordinate system (upper-
+    // left origin).
+    uint characterIndexForPoint(int x, int y);
+
+    // Returns the frame rectangle for a given substring range in the Frame's
+    // text stream.
+    WebRect firstRectForRange(uint location, uint length);
+
+    // Returns a serialized NSAttributedString (via NSData) that is a substring
+    // of the Frame at the given range.
+    WebString substringInRange(uint location, uint length);
+
+protected:
+    WebPrivateOwnPtr<WebTextHelperImpl> m_private;
+};
+
+} // namespace WebKit
+
+#endif