CPAPI gears drag drop and renderer IPC....

CPAPI (0.10) functions for gears drag drop; one to extract the
drag type/data given an NPObject *event, one to override the
drop effect (drag cursor).

Gears drag drop API receives a browser event as an NPObject* so
the event is untrusted.  Provide IPC calls to the renderer so
gears can pass the event to renderer/V8 for checking, prior to
drag type/data extraction, or the setting of the drop effect.

V8 event checking is a TODO(noel), http://mondrian/10947778 for
the CPAPI (0.10) change submitted to gears.

BUG=7995

Original patch by Noel Gordon via:
http://codereview.chromium.org/99240
Review URL: http://codereview.chromium.org/115280

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15986 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 37 insertions, 0 deletions

diff --git a/chrome/plugin/chrome_plugin_host.cc b/chrome/plugin/chrome_plugin_host.cc
index 992afcf..4874e41 100644
--- a/chrome/plugin/chrome_plugin_host.cc
+++ b/chrome/plugin/chrome_plugin_host.cc
@@ -313,6 +313,41 @@ CPError STDCALL CPB_ShowHtmlDialog(
   return CPERR_FAILURE;
 }
 
+CPError STDCALL CPB_GetDragData(
+    CPID id, CPBrowsingContext context, struct NPObject* event, bool add_data,
+    int32 *identity, int32 *event_id, char **drag_type, char **drag_data) {
+  CHECK(ChromePluginLib::IsPluginThread());
+
+  *identity = *event_id = 0;
+  WebPluginProxy* webplugin = WebPluginProxy::FromCPBrowsingContext(context);
+  if (!event || !webplugin)
+    return CPERR_INVALID_PARAMETER;
+
+  std::string type_str, data_str;
+  if (!webplugin->GetDragData(event, add_data,
+                              identity, event_id, &type_str, &data_str)) {
+    return CPERR_FAILURE;
+  }
+
+  if (add_data)
+    *drag_data = CPB_StringDup(CPB_Alloc, data_str);
+  *drag_type = CPB_StringDup(CPB_Alloc, type_str);
+  return CPERR_SUCCESS;
+}
+
+CPError STDCALL CPB_SetDropEffect(
+    CPID id, CPBrowsingContext context, struct NPObject* event, int effect) {
+  CHECK(ChromePluginLib::IsPluginThread());
+
+  WebPluginProxy* webplugin = WebPluginProxy::FromCPBrowsingContext(context);
+  if (!event || !webplugin)
+    return CPERR_INVALID_PARAMETER;
+
+  if (webplugin->SetDropEffect(event, effect))
+    return CPERR_SUCCESS;
+  return CPERR_FAILURE;
+}
+
 CPError STDCALL CPB_GetCommandLineArguments(
     CPID id, CPBrowsingContext context, const char* url, char** arguments) {
   CHECK(ChromePluginLib::IsPluginThread());
@@ -597,6 +632,8 @@ CPBrowserFuncs* GetCPBrowserFuncsForPlugin() {
     browser_funcs.send_sync_message = CPB_SendSyncMessage;
     browser_funcs.plugin_thread_async_call = CPB_PluginThreadAsyncCall;
     browser_funcs.open_file_dialog = CPB_OpenFileDialog;
+    browser_funcs.get_drag_data = CPB_GetDragData;
+    browser_funcs.set_drop_effect = CPB_SetDropEffect;
 
     browser_funcs.request_funcs = &request_funcs;
     browser_funcs.response_funcs = &response_funcs;