Add Clipboard GetSequenceNumber interface which allows us to version the data on the clipboard.

BUG=73478 
Review URL: http://codereview.chromium.org/7222016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@90646 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 12 insertions, 0 deletions

diff --git a/webkit/glue/webclipboard_impl.cc b/webkit/glue/webclipboard_impl.cc
index f0a8b1a..86bcaf0 100644
--- a/webkit/glue/webclipboard_impl.cc
+++ b/webkit/glue/webclipboard_impl.cc
@@ -141,6 +141,10 @@ WebData WebClipboardImpl::readImage(Buffer buffer) {
   return WebData(png_data);
 }
 
+uint64 WebClipboardImpl::getSequenceNumber() {
+  return ClipboardGetSequenceNumber();
+}
+
 void WebClipboardImpl::writeHTML(
     const WebString& html_text, const WebURL& source_url,
     const WebString& plain_text, bool write_smart_paste) {
diff --git a/webkit/glue/webclipboard_impl.h b/webkit/glue/webclipboard_impl.h
index c50f38d..0cee5d2 100644
--- a/webkit/glue/webclipboard_impl.h
+++ b/webkit/glue/webclipboard_impl.h
@@ -26,6 +26,7 @@ class WebClipboardImpl : public WebKit::WebClipboard {
   virtual WebKit::WebString readPlainText(Buffer);
   virtual WebKit::WebString readHTML(Buffer, WebKit::WebURL* source_url);
   virtual WebKit::WebData readImage(Buffer);
+  virtual uint64 getSequenceNumber();
   virtual void writeHTML(
       const WebKit::WebString& html_text,
       const WebKit::WebURL& source_url,
diff --git a/webkit/glue/webkit_glue.h b/webkit/glue/webkit_glue.h
index e9c945c..1de78e6 100644
--- a/webkit/glue/webkit_glue.h
+++ b/webkit/glue/webkit_glue.h
@@ -201,6 +201,9 @@ void ClipboardReadImage(ui::Clipboard::Buffer buffer, std::string* data);
 bool ClipboardReadData(ui::Clipboard::Buffer buffer, const string16& type,
                        string16* data, string16* metadata);
 
+// Get a sequence number which uniquely identifies clipboard state.
+uint64 ClipboardGetSequenceNumber();
+
 // Reads filenames from the clipboard, if available.
 bool ClipboardReadFilenames(ui::Clipboard::Buffer buffer,
                             std::vector<string16>* filenames);
diff --git a/webkit/tools/test_shell/simple_clipboard_impl.cc b/webkit/tools/test_shell/simple_clipboard_impl.cc
index 2bb35df..77910d0 100644
--- a/webkit/tools/test_shell/simple_clipboard_impl.cc
+++ b/webkit/tools/test_shell/simple_clipboard_impl.cc
@@ -94,4 +94,8 @@ bool ClipboardReadFilenames(ui::Clipboard::Buffer buffer,
   return false;
 }
 
+uint64 ClipboardGetSequenceNumber() {
+  return 0;
+}
+
 }  // namespace webkit_glue