Multi-Process Find-in-Page.

content/common/frame_messages.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include <stddef.h>
 #include <stdint.h>
 
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 // Send to the RenderFrame to set text tracks state and style settings.
 // Sent for top-level frames.
 IPC_MESSAGE_ROUTED1(FrameMsg_SetTextTrackSettings,
                     FrameMsg_TextTrackSettings_Params /* params */)
 
 // Posts a message from a frame in another process to the current renderer.
 IPC_MESSAGE_ROUTED1(FrameMsg_PostMessageEvent, FrameMsg_PostMessage_Params)
 
 #if defined(OS_ANDROID)
+// Request the distance to the nearest find result in a frame from the point at
+// (x, y), defined in fractions of the content document's width and height. The
+// distance will be returned via FrameHostMsg_GetNearestFindResult_Reply.  Note
+// that |nfr_request_id| is a completely seperate ID from the |request_id| used
+// in other find-related IPCs. It is specifically used to uniquely identify a
+// nearest find result request, rather than a find request.
+IPC_MESSAGE_ROUTED3(FrameMsg_GetNearestFindResult,
+                    int /* nfr_request_id */,
+                    float /* x */,
+                    float /* y */)
+
+// Activates a find result. The point (x,y) is in fractions of the content
+// document's width and height.
+IPC_MESSAGE_ROUTED3(FrameMsg_ActivateNearestFindResult,
+                    int /* request_id */,
+                    float /* x */,
+                    float /* y */)
+
 // Sent when the browser wants the bounding boxes of the current find matches.
 //
 // If match rects are already cached on the browser side, |current_version|
 // should be the version number from the FrameHostMsg_FindMatchRects_Reply
 // they came in, so the renderer can tell if it needs to send updated rects.
 // Otherwise just pass -1 to always receive the list of rects.
 //
 // There must be an active search string (it is probably most useful to call
 // this immediately after a FrameHostMsg_Find_Reply message arrives with
 // final_update set to true).
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 IPC_MESSAGE_ROUTED2(FrameMsg_AdvanceFocus,
                     blink::WebFocusType /* type */,
                     int32_t /* source_routing_id */)
 
 // Sent when the user wants to search for a word on the page (find-in-page).
 IPC_MESSAGE_ROUTED3(FrameMsg_Find,
                     int /* request_id */,
                     base::string16 /* search_text */,
                     blink::WebFindOptions)
 
-// This message notifies the renderer that the user has closed the find-in-page
+// This message notifies the frame that it is no longer the active frame in the
+// current find session, and so it should clear its active find match (and no
+// longer highlight it with special coloring).
+IPC_MESSAGE_ROUTED0(FrameMsg_ClearActiveFindMatch)
+
+// This message notifies the frame that the user has closed the find-in-page
 // window (and what action to take regarding the selection).
 IPC_MESSAGE_ROUTED1(FrameMsg_StopFinding, content::StopFindAction /* action */)
 
 #if defined(ENABLE_PLUGINS)
 // Notifies the renderer of updates to the Plugin Power Saver origin whitelist.
 IPC_MESSAGE_ROUTED1(FrameMsg_UpdatePluginContentOriginWhitelist,
                     std::set<url::Origin> /* origin_whitelist */)
 #endif  // defined(ENABLE_PLUGINS)
 
 // Used to instruct the RenderFrame to go into "view source" mode. This should
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 // your locally cached rects should still be valid). The rect coords will be
 // custom normalized fractions of the document size. The rects will be sorted by
 // frame traversal order starting in the main frame, then by dom order.
 //
 // |active_rect| will contain the bounding box of the active find-in-page match
 // marker, in similarly normalized coords (or an empty rect if there isn't one).
 IPC_MESSAGE_ROUTED3(FrameHostMsg_FindMatchRects_Reply,
                     int /* version */,
                     std::vector<gfx::RectF> /* rects */,
                     gfx::RectF /* active_rect */)
+
+// Response to FrameMsg_GetNearestFindResult. |distance| is the distance to the
+// nearest find result in the sending frame.
+IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
+                    int /* nfr_request_id */,
+                    float /* distance */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.