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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/browser/debug_console.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "cobalt/base/cobalt_paths.h"
#include "cobalt/base/source_location.h"
#include "cobalt/browser/switches.h"
#include "cobalt/dom/csp_delegate_factory.h"
#include "cobalt/dom/mutation_observer_task_manager.h"
#include "cobalt/dom/window.h"
namespace cobalt {
namespace browser {
namespace {
// Files for the debug console web page are bundled with the executable.
const char kInitialDebugConsoleUrl[] =
const char kDebugConsoleModeOffString[] = "off";
const char kDebugConsoleModeHudString[] = "hud";
const char kDebugConsoleModeDebugString[] = "debug";
const char kDebugConsoleModeDebugStringAlias[] = "on"; // Legacy name of mode.
const char kDebugConsoleModeMediaString[] = "media";
// Convert from a debug console visibility setting string to an integer
// value specified by a constant defined in debug::console::DebugHub.
base::Optional<int> DebugConsoleModeStringToInt(
const std::string& mode_string) {
// Static casting is necessary in order to get around what appears to be a
// compiler error on Linux when implicitly constructing a base::Optional<int>
// from a static const int.
if (mode_string == kDebugConsoleModeOffString) {
return static_cast<int>(debug::console::kDebugConsoleModeOff);
} else if (mode_string == kDebugConsoleModeHudString) {
return static_cast<int>(debug::console::kDebugConsoleModeHud);
} else if (mode_string == kDebugConsoleModeDebugString) {
return static_cast<int>(debug::console::kDebugConsoleModeDebug);
} else if (mode_string == kDebugConsoleModeDebugStringAlias) {
return static_cast<int>(debug::console::kDebugConsoleModeDebug);
} else if (mode_string == kDebugConsoleModeMediaString) {
return static_cast<int>(debug::console::kDebugConsoleModeMedia);
} else {
DLOG(WARNING) << "Debug console mode \"" << mode_string
<< "\" not recognized.";
return base::nullopt;
// Returns the debug console mode as specified by the command line.
// If unspecified by the command line, base::nullopt is returned.
base::Optional<int> GetDebugConsoleModeFromCommandLine() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kDebugConsoleMode)) {
const std::string debug_console_mode_string =
return DebugConsoleModeStringToInt(debug_console_mode_string);
return base::nullopt;
// Returns the debug console's initial visibility mode.
int GetInitialMode() {
// First check to see if the mode is explicitly set from the command line.
base::Optional<int> mode_from_command_line =
if (mode_from_command_line) {
return *mode_from_command_line;
// By default the debug console is off.
return debug::console::kDebugConsoleModeOff;
// A function to create a DebugHub object, to be injected into WebModule.
scoped_refptr<script::Wrappable> CreateDebugHub(
const debug::console::DebugHub::GetHudModeCallback& get_hud_mode_function,
const debug::CreateDebugClientCallback& create_debug_client_callback,
const scoped_refptr<dom::Window>& window,
script::GlobalEnvironment* global_environment) {
return new debug::console::DebugHub(get_hud_mode_function,
} // namespace
base::ApplicationState initial_application_state,
const WebModule::OnRenderTreeProducedCallback&
network::NetworkModule* network_module,
const cssom::ViewportSize& window_dimensions,
render_tree::ResourceProvider* resource_provider, float layout_refresh_rate,
const debug::CreateDebugClientCallback& create_debug_client_callback,
const base::Closure& maybe_freeze_callback) {
mode_ = GetInitialMode();
WebModule::Options web_module_options; = "DebugConsoleWebModule";
// The debug console does not load any image assets.
web_module_options.image_cache_capacity = 0;
// Disable CSP for the Debugger's WebModule. This will also allow eval() in
// javascript.
web_module_options.csp_enforcement_mode = dom::kCspEnforcementDisable;
web_module_options.csp_insecure_allowed_token =
// Since the debug console is intended to be overlaid on top of the main
// web module contents, make sure blending is enabled for its background.
web_module_options.clear_window_with_background_color = false;
// Attach a DebugHub object to the "debugHub" Window attribute for this
// web module so that JavaScript within this WebModule has access to DebugHub
// functionality.
web_module_options.injected_window_attributes["debugHub"] =
base::Bind(&DebugConsole::GetMode, base::Unretained(this)),
// Pass down this callback from Browser module to Web module eventually.
web_module_options.maybe_freeze_callback = maybe_freeze_callback;
web_module_.reset(new WebModule(
GURL(kInitialDebugConsoleUrl), initial_application_state,
base::Bind(&DebugConsole::OnError, base::Unretained(this)),
WebModule::CloseCallback(), /* window_close_callback */
base::Closure(), /* window_minimize_callback */
NULL /* can_play_type_handler */, NULL /* web_media_player_factory */,
network_module, window_dimensions, resource_provider, layout_refresh_rate,
DebugConsole::~DebugConsole() {}
bool DebugConsole::ShouldInjectInputEvents() {
switch (GetMode()) {
case debug::console::kDebugConsoleModeOff:
case debug::console::kDebugConsoleModeHud:
return false;
return true;
bool DebugConsole::FilterKeyEvent(base::Token type,
const dom::KeyboardEventInit& event) {
// Return true to indicate the event should still be handled.
if (!ShouldInjectInputEvents()) return true;
web_module_->InjectKeyboardEvent(type, event);
return false;
bool DebugConsole::FilterWheelEvent(base::Token type,
const dom::WheelEventInit& event) {
// Return true to indicate the event should still be handled.
if (!ShouldInjectInputEvents()) return true;
web_module_->InjectWheelEvent(type, event);
return false;
bool DebugConsole::FilterPointerEvent(base::Token type,
const dom::PointerEventInit& event) {
// Return true to indicate the event should still be handled.
if (!ShouldInjectInputEvents()) return true;
web_module_->InjectPointerEvent(type, event);
return false;
bool DebugConsole::FilterOnScreenKeyboardInputEvent(
base::Token type, const dom::InputEventInit& event) {
// Return true to indicate the event should still be handled.
if (!ShouldInjectInputEvents()) return true;
web_module_->InjectOnScreenKeyboardInputEvent(type, event);
return false;
#endif // SB_API_VERSION >= 12 ||
void DebugConsole::CycleMode() {
base::AutoLock lock(mode_mutex_);
mode_ = (mode_ + 1) % debug::console::kDebugConsoleModeCount;
debug::console::DebugConsoleMode DebugConsole::GetMode() {
base::AutoLock lock(mode_mutex_);
return static_cast<debug::console::DebugConsoleMode>(mode_);
} // namespace browser
} // namespace cobalt