Adds selection expansion support for Contextual Search.

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 1336 matching lines @@
         OnGetSerializedHtmlDataForCurrentPageWithLocalLinks)
     IPC_MESSAGE_HANDLER(ViewMsg_ShowContextMenu, OnShowContextMenu)
     // TODO(viettrungluu): Move to a separate message filter.
     IPC_MESSAGE_HANDLER(ViewMsg_SetHistoryOffsetAndLength,
                         OnSetHistoryOffsetAndLength)
     IPC_MESSAGE_HANDLER(ViewMsg_EnableViewSourceMode, OnEnableViewSourceMode)
     IPC_MESSAGE_HANDLER(ViewMsg_ReleaseDisambiguationPopupBitmap,
                         OnReleaseDisambiguationPopupBitmap)
     IPC_MESSAGE_HANDLER(ViewMsg_ForceRedraw, OnForceRedraw)
     IPC_MESSAGE_HANDLER(ViewMsg_SelectWordAroundCaret, OnSelectWordAroundCaret)
+    IPC_MESSAGE_HANDLER(ViewMsg_MoveSelectionByCharacterOffset,
+                        OnMoveSelectionByCharacterOffset)
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(InputMsg_ActivateNearestFindResult,
                         OnActivateNearestFindResult)
     IPC_MESSAGE_HANDLER(ViewMsg_FindMatchRects, OnFindMatchRects)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateTopControlsState,
                         OnUpdateTopControlsState)
     IPC_MESSAGE_HANDLER(ViewMsg_ExtractSmartClipData, OnExtractSmartClipData)
 #elif defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(ViewMsg_GetRenderedText,
                         OnGetRenderedText)
@@ skipping 16 matching lines @@
 
 void RenderViewImpl::OnSelectWordAroundCaret() {
   if (!webview())
     return;
 
   handling_input_event_ = true;
   webview()->focusedFrame()->selectWordAroundCaret();
   handling_input_event_ = false;
 }
 
+void RenderViewImpl::OnMoveSelectionByCharacterOffset(int start_adjust,
+                                                      int end_adjust) {
+  if (!webview())
+    return;
+
+  handling_input_event_ = true;
+  size_t start, length;
+  if (webview()->caretOrSelectionRange(&start, &length)) {
+    start += start_adjust;
+    length += end_adjust - start_adjust;

[David Trainor- moved to gerrit, 2015/06/25 00:34:55]

Do some checks on this stuff to make sure these values are valid after the
adjustments.  size_t is unsigned right?

+    WebLocalFrame* web_local_frame =
+        webview()->focusedFrame()->toWebLocalFrame();
+    web_local_frame->selectRange(WebRange::fromDocumentRange(web_local_frame,
+                                                             start,
+                                                             length));
+  }
+  handling_input_event_ = false;
+}
+
 void RenderViewImpl::OnCopyImageAt(int x, int y) {
   webview()->copyImageAt(WebPoint(x, y));
 }
 
 void RenderViewImpl::OnSaveImageAt(int x, int y) {
   webview()->saveImageAt(WebPoint(x, y));
 }
 
 void RenderViewImpl::OnUpdateTargetURLAck() {
   // Check if there is a targeturl waiting to be sent.
@@ skipping 2391 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content