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 85 matching lines @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebMediaStreamRegistry.h"
 #include "third_party/WebKit/public/web/WebNavigationPolicy.h"
 #include "third_party/WebKit/public/web/WebPlugin.h"
 #include "third_party/WebKit/public/web/WebPluginParams.h"
 #include "third_party/WebKit/public/web/WebRange.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 #include "third_party/WebKit/public/web/WebSearchableFormData.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
+#include "third_party/WebKit/public/web/WebSurroundingText.h"
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "webkit/child/weburlresponse_extradata_impl.h"
 
 #if defined(ENABLE_PLUGINS)
 #include "content/renderer/npapi/webplugin_impl.h"
 #include "content/renderer/pepper/pepper_browser_connection.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/pepper/pepper_webplugin_impl.h"
 #include "content/renderer/pepper/plugin_module.h"
@@ skipping 599 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(int max_length) {
+  blink::WebSurroundingText surroundingText;
+  surroundingText.initialize(frame_->selectionRange(), max_length);
+
+  if (surroundingText.isNull()) {
+    // |surroundingText| might not be correctly initialized in some edge cases,
+    // we shouldn't call any method in that case.
+    Send(new FrameHostMsg_TextSurroundingSelectionResponse(
+        routing_id_, base::string16(), 0, 0));
+    return;
+  }
+
+  Send(new FrameHostMsg_TextSurroundingSelectionResponse(
+      routing_id_,
+      surroundingText.textContent(),
+      surroundingText.startOffsetInTextContent(),
+      surroundingText.endOffsetInTextContent()));
+}
+
 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 2351 matching lines @@
 
 RendererCdmManager* RenderFrameImpl::GetCdmManager() {
   if (!cdm_manager_)
     cdm_manager_ = new RendererCdmManager(this);
   return cdm_manager_;
 }
 
 #endif  // defined(OS_ANDROID)
 
 }  // namespace content