Adding Navigation Throttles to DevTools

content/browser/devtools/protocol/page_handler.cc

 // Copyright 2014 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/browser/devtools/protocol/page_handler.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
+#include "content/browser/devtools/page_navigation_throttle.h"
 #include "content/browser/devtools/protocol/color_picker.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/javascript_dialog_manager.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/referrer.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/gfx/codec/jpeg_codec.h"
 #include "ui/gfx/codec/png_codec.h"
@@ skipping 59 matching lines @@
       screencast_enabled_(false),
       screencast_quality_(kDefaultScreenshotQuality),
       screencast_max_width_(-1),
       screencast_max_height_(-1),
       capture_every_nth_frame_(1),
       capture_retry_count_(0),
       has_compositor_frame_metadata_(false),
       session_id_(0),
       frame_counter_(0),
       frames_in_flight_(0),
-      color_picker_(new ColorPicker(base::Bind(
-          &PageHandler::OnColorPicked, base::Unretained(this)))),
+      color_picker_(new ColorPicker(
+          base::Bind(&PageHandler::OnColorPicked, base::Unretained(this)))),
+      navigation_throttle_enabled_(false),
+      next_navigation_id_(0),
       host_(nullptr),
-      weak_factory_(this) {
-}
+      weak_factory_(this) {}
 
 PageHandler::~PageHandler() {
 }
 
 void PageHandler::SetRenderFrameHost(RenderFrameHostImpl* host) {
   if (host_ == host)
     return;
 
   RenderWidgetHostImpl* widget_host =
       host_ ? host_->GetRenderWidgetHost() : nullptr;
@@ skipping 74 matching lines @@
 }
 
 Response PageHandler::Enable() {
   enabled_ = true;
   return Response::FallThrough();
 }
 
 Response PageHandler::Disable() {
   enabled_ = false;
   screencast_enabled_ = false;
+  SetControlNavigations(false);
   color_picker_->SetEnabled(false);
   return Response::FallThrough();
 }
 
 Response PageHandler::Reload(const bool* bypassCache,
                              const std::string* script_to_evaluate_on_load,
                              const std::string* script_preprocessor) {
   WebContentsImpl* web_contents = GetWebContents();
   if (!web_contents)
     return Response::InternalError("Could not connect to view");
@@ skipping 152 matching lines @@
 }
 
 Response PageHandler::RequestAppBanner() {
   WebContentsImpl* web_contents = GetWebContents();
   if (!web_contents)
     return Response::InternalError("Could not connect to view");
   web_contents->GetDelegate()->RequestAppBannerFromDevTools(web_contents);
   return Response::OK();
 }
 
+Response PageHandler::SetControlNavigations(bool enabled) {
+  navigation_throttle_enabled_ = enabled;
+  // We don't own the page PageNavigationThrottles so we can't delete them, but
+  // we can turn them into NOPs.
+  for (auto& pair : navigation_throttles_) {
+    pair.second->AlwaysProceed();
+  }
+  navigation_throttles_.clear();
+  return Response::OK();
+}
+
+Response PageHandler::ProcessNavigation(const std::string& response,
+                                        int navigation_id) {
+  auto it = navigation_throttles_.find(navigation_id);
+  if (it == navigation_throttles_.end())
+    return Response::InvalidParams("Unknown navigation id");
+
+  if (response == kNavigationResponseProceed) {
+    it->second->Resume();
+    return Response::OK();
+  } else if (response == kNavigationResponseCancel) {
+    it->second->CancelDeferredNavigation(content::NavigationThrottle::CANCEL);
+    return Response::OK();
+  } else if (response == kNavigationResponseCancelAndIgnore) {
+    it->second->CancelDeferredNavigation(
+        content::NavigationThrottle::CANCEL_AND_IGNORE);
+    return Response::OK();
+  }
+
+  return Response::InvalidParams("Unrecognized response");
+}
+
+std::unique_ptr<PageNavigationThrottle>
+PageHandler::CreateThrottleForNavigation(NavigationHandle* navigation_handle) {
+  if (!navigation_throttle_enabled_)
+    return nullptr;
+
+  std::unique_ptr<PageNavigationThrottle> throttle(new PageNavigationThrottle(
+      weak_factory_.GetWeakPtr(), next_navigation_id_, navigation_handle));
+  navigation_throttles_[next_navigation_id_++] = throttle.get();
+  return throttle;
+}
+
+void PageHandler::OnPageNavigationThrottleDisposed(int navigation_id) {
+  DCHECK(navigation_throttles_.find(navigation_id) !=
+         navigation_throttles_.end());
+  navigation_throttles_.erase(navigation_id);
+}
+
+void PageHandler::NavigationRequested(const PageNavigationThrottle* throttle) {
+  NavigationHandle* navigation_handle = throttle->navigation_handle();
+  client_->NavigationRequested(
+      NavigationRequestedParams::Create()
+          ->set_is_in_main_frame(navigation_handle->IsInMainFrame())
+          ->set_is_redirect(navigation_handle->WasServerRedirect())
+          ->set_navigation_id(throttle->navigation_id())
+          ->set_url(navigation_handle->GetURL().spec()));
+}
+
 WebContentsImpl* PageHandler::GetWebContents() {
   return host_ ?
       static_cast<WebContentsImpl*>(WebContents::FromRenderFrameHost(host_)) :
       nullptr;
 }
 
 void PageHandler::NotifyScreencastVisibility(bool visible) {
   if (visible)
     capture_retry_count_ = kCaptureRetryLimit;
   client_->ScreencastVisibilityChanged(
@@ skipping 130 matching lines @@
 
 void PageHandler::OnColorPicked(int r, int g, int b, int a) {
   scoped_refptr<dom::RGBA> color =
       dom::RGBA::Create()->set_r(r)->set_g(g)->set_b(b)->set_a(a);
   client_->ColorPicked(ColorPickedParams::Create()->set_color(color));
 }
 
 }  // namespace page
 }  // namespace devtools
 }  // namespace content