Plumbing for browser process to access text surrounding selection.

content/renderer/render_frame_impl.cc

 // 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 687 matching lines @@
     IPC_MESSAGE_HANDLER(InputMsg_ReplaceMisspelling, OnReplaceMisspelling)
     IPC_MESSAGE_HANDLER(FrameMsg_CSSInsertRequest, OnCSSInsertRequest)
     IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequest,
                         OnJavaScriptExecuteRequest)
     IPC_MESSAGE_HANDLER(FrameMsg_SetEditableSelectionOffsets,
                         OnSetEditableSelectionOffsets)
     IPC_MESSAGE_HANDLER(FrameMsg_SetCompositionFromExistingText,
                         OnSetCompositionFromExistingText)
     IPC_MESSAGE_HANDLER(FrameMsg_ExtendSelectionAndDelete,
                         OnExtendSelectionAndDelete)
+    IPC_MESSAGE_HANDLER(FrameMsg_Reload, OnReload)
+    IPC_MESSAGE_HANDLER(FrameMsg_TextSurroundingSelectionRequest,
+                        OnTextSurroundingSelectionRequest)
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(InputMsg_CopyToFindPboard, OnCopyToFindPboard)
 #endif
-    IPC_MESSAGE_HANDLER(FrameMsg_Reload, OnReload)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void RenderFrameImpl::OnNavigate(const FrameMsg_Navigate_Params& params) {
   MaybeHandleDebugURL(params.url);
   if (!render_view_->webview())
     return;
 
@@ skipping 458 matching lines @@
   frame_->setCompositionFromExistingText(start, end, underlines);
 }
 
 void RenderFrameImpl::OnExtendSelectionAndDelete(int before, int after) {
   if (!GetRenderWidget()->ShouldHandleImeEvent())
     return;
   ImeEventGuard guard(GetRenderWidget());
   frame_->extendSelectionAndDelete(before, after);
 }
 
-
 void RenderFrameImpl::OnReload(bool ignore_cache) {
   frame_->reload(ignore_cache);
 }
 
+void RenderFrameImpl::OnTextSurroundingSelectionRequest(unsigned max_length) {
+  unsigned start_offset, end_offset;
+  base::string16 content =
+      frame_->textSurroundingSelection(max_length, &start_offset, &end_offset);
+
+  Send(new FrameHostMsg_TextSurroundingSelectionResponse(
+      routing_id_, content, start_offset, end_offset));
+}
+
 bool RenderFrameImpl::ShouldUpdateSelectionTextFromContextMenuParams(
     const base::string16& selection_text,
     size_t selection_text_offset,
     const gfx::Range& selection_range,
     const ContextMenuParams& params) {
   base::string16 trimmed_selection_text;
   if (!selection_text.empty() && !selection_range.is_empty()) {
     const int start = selection_range.GetMin() - selection_text_offset;
     const size_t length = selection_range.length();
     if (start >= 0 && start + length <= selection_text.length()) {
@@ skipping 2285 matching lines @@
       weak_factory_.GetWeakPtr(),
       render_view_->media_player_manager_,
       stream_texture_factory,
       RenderThreadImpl::current()->GetMediaThreadMessageLoopProxy(),
       new RenderMediaLog());
 }
 
 #endif
 
 }  // namespace content