Plumbs through window.chrome.setSuggestResult.

chrome/renderer/search_extension.cc

+// Copyright (c) 2010 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 "chrome/renderer/search_extension.h"
+
+#include "base/command_line.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/render_messages_params.h"
+#include "chrome/renderer/render_view.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
+#include "v8/include/v8.h"
+
+using WebKit::WebFrame;
+using WebKit::WebView;
+
+namespace extensions_v8 {
+
+const char* const kSearchExtensionName = "v8/InstantSearch";
+
+class SearchExtensionWrapper : public v8::Extension {
+ public:
+  SearchExtensionWrapper();
+
+  // Allows v8's javascript code to call the native functions defined
+  // in this class for window.chrome.
+  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
+      v8::Handle<v8::String> name);
+
+  // Helper function to find the RenderView. May return NULL.
+  static RenderView* GetRenderView();
+
+  // Implementation of window.chrome.setSuggestResult.
+  static v8::Handle<v8::Value> SetSuggestResult(const v8::Arguments& args);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SearchExtensionWrapper);
+};
+
+SearchExtensionWrapper::SearchExtensionWrapper()
+    : v8::Extension(kSearchExtensionName,
+      "var chrome;"
+      "if (!chrome)"
+      "  chrome = {};"
+      "chrome.setSuggestResult = function(text) {"

[Mike Belshe, 2010/09/10 18:15:06]

note: This function will be available to anyone that wants to call it.  For
instance, someone could write an extension which calls this function with a
bunch of spam.  Do we want to allow that?

+      "  native function NativeSetSuggestResult();"
+      "  NativeSetSuggestResult(text);"
+      "};") {
+}
+
+v8::Handle<v8::FunctionTemplate> SearchExtensionWrapper::GetNativeFunction(
+    v8::Handle<v8::String> name) {
+  if (name->Equals(v8::String::New("NativeSetSuggestResult"))) {
+    return v8::FunctionTemplate::New(SetSuggestResult);
+  }
+
+  return v8::Handle<v8::FunctionTemplate>();
+}
+
+// static
+RenderView* SearchExtensionWrapper::GetRenderView() {
+  WebFrame* webframe = WebFrame::frameForEnteredContext();
+  DCHECK(webframe) << "There should be an active frame since we just got "
+      "a native function called.";
+  if (!webframe) return NULL;

[Mike Belshe, 2010/09/10 18:15:06]

nit:  are we supposed to break this to two lines?

+
+  WebView* webview = webframe->view();
+  if (!webview) return NULL;  // can happen during closing
+
+  return RenderView::FromWebView(webview);
+}
+
+// static
+v8::Handle<v8::Value> SearchExtensionWrapper::SetSuggestResult(
+    const v8::Arguments& args) {
+  if (!args.Length()) return v8::Undefined();
+
+  std::string suggest = std::string(*v8::String::Utf8Value(args[0]));
+  if (!suggest.length()) return v8::Undefined();
+
+  RenderView* render_view = GetRenderView();
+  if (!render_view) return v8::Undefined();
+
+  render_view->SetSuggestResult(suggest);
+  return v8::Undefined();
+}
+
+v8::Extension* SearchExtension::Get() {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableMatchPreview)) {
+    return new SearchExtensionWrapper();
+  }
+  return NULL;
+}
+
+}  // namespace extensions_v8