[chromedriver] Separate stuff of chrome from chromedriver.

chrome/test/chromedriver/navigation_tracker.cc

-// Copyright (c) 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 "chrome/test/chromedriver/navigation_tracker.h"
-
-#include "base/logging.h"
-#include "base/stringprintf.h"
-#include "base/values.h"
-#include "chrome/test/chromedriver/devtools_client.h"
-#include "chrome/test/chromedriver/status.h"
-
-NavigationTracker::NavigationTracker(DevToolsClient* client)
-    : client_(client),
-      loading_state_(kUnknown) {
-  client_->AddListener(this);
-}
-
-NavigationTracker::NavigationTracker(DevToolsClient* client,
-                                     LoadingState known_state)
-    : client_(client),
-      loading_state_(known_state) {
-  client_->AddListener(this);
-}
-
-NavigationTracker::~NavigationTracker() {}
-
-Status NavigationTracker::IsPendingNavigation(const std::string& frame_id,
-                                              bool* is_pending) {
-  if (loading_state_ == kUnknown) {
-    // If the loading state is unknown (which happens after first connecting),
-    // force loading to start and set the state to loading. This will
-    // cause a frame start event to be received, and the frame stop event
-    // will not be received until all frames are loaded.
-    // Loading is forced to start by attaching a temporary iframe.
-    // Forcing loading to start is not necessary if the main frame is not yet
-    // loaded.
-    const char kStartLoadingIfMainFrameNotLoading[] =
-       "var isLoaded = document.readyState == 'complete' ||"
-       "    document.readyState == 'interactive';"
-       "if (isLoaded) {"
-       "  var frame = document.createElement('iframe');"
-       "  frame.src = 'about:blank';"
-       "  document.body.appendChild(frame);"
-       "  window.setTimeout(function() {"
-       "    document.body.removeChild(frame);"
-       "  }, 0);"
-       "}";
-    base::DictionaryValue params;
-    params.SetString("expression", kStartLoadingIfMainFrameNotLoading);
-    scoped_ptr<base::DictionaryValue> result;
-    Status status = client_->SendCommandAndGetResult(
-        "Runtime.evaluate", params, &result);
-    if (status.IsError())
-      return Status(kUnknownError, "cannot determine loading status", status);
-
-    // Between the time the JavaScript is evaluated and SendCommandAndGetResult
-    // returns, OnEvent may have received info about the loading state.
-    // This is only possible during a nested command. Only set the loading state
-    // if the loading state is still unknown.
-    if (loading_state_ == kUnknown)
-      loading_state_ = kLoading;
-  }
-  *is_pending = (loading_state_ == kLoading) ||
-                scheduled_frame_set_.count(frame_id) > 0;
-  return Status(kOk);
-}
-
-Status NavigationTracker::OnConnected() {
-  loading_state_ = kUnknown;
-  scheduled_frame_set_.clear();
-
-  // Enable page domain notifications to allow tracking navigation state.
-  base::DictionaryValue empty_params;
-  return client_->SendCommand("Page.enable", empty_params);
-}
-
-void NavigationTracker::OnEvent(const std::string& method,
-                                const base::DictionaryValue& params) {
-  // Chrome does not send Page.frameStoppedLoading until all frames have
-  // run their onLoad handlers (including frames created during the handlers).
-  // When it does, it only sends one stopped event for all frames.
-  if (method == "Page.frameStartedLoading") {
-    loading_state_ = kLoading;
-  } else if (method == "Page.frameStoppedLoading") {
-    loading_state_ = kNotLoading;
-  } else if (method == "Page.frameScheduledNavigation") {
-    double delay;
-    if (!params.GetDouble("delay", &delay)) {
-      LOG(ERROR) << "missing or invalid 'delay'";
-      return;
-    }
-    std::string frame_id;
-    if (!params.GetString("frameId", &frame_id)) {
-      LOG(ERROR) << "missing or invalid 'frameId'";
-      return;
-    }
-    // WebDriver spec says to ignore redirects over 1s.
-    if (delay > 1)
-      return;
-    scheduled_frame_set_.insert(frame_id);
-  } else if (method == "Page.frameClearedScheduledNavigation") {
-    std::string frame_id;
-    if (!params.GetString("frameId", &frame_id)) {
-      LOG(ERROR) << "missing or invalid 'frameId'";
-      return;
-    }
-    scheduled_frame_set_.erase(frame_id);
-  } else if (method == "Page.frameNavigated") {
-    // Note: in some cases Page.frameNavigated may be received for subframes
-    // without a frameStoppedLoading (for example cnn.com).
-
-    // If the main frame just navigated, discard any pending scheduled
-    // navigations. For some reasons at times the cleared event is not
-    // received when navigating.
-    // See crbug.com/180742.
-    const base::Value* unused_value;
-    if (!params.Get("frame.parentId", &unused_value))
-      scheduled_frame_set_.clear();
-  }
-}