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// 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 "chrome/browser/extensions/api/automation_internal/automation_internal_api.h"
#include <vector>
#include "base/strings/string_number_conversions.h"
#include "chrome/browser/extensions/api/automation_internal/automation_action_adapter.h"
#include "chrome/browser/extensions/api/automation_internal/automation_util.h"
#include "chrome/browser/extensions/api/tabs/tabs_constants.h"
#include "chrome/browser/extensions/extension_tab_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/common/extensions/api/automation_internal.h"
#include "chrome/common/extensions/manifest_handlers/automation.h"
#include "content/public/browser/ax_event_notification_details.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "extensions/common/permissions/permissions_data.h"
#if defined(OS_CHROMEOS)
#include "chrome/browser/ui/ash/accessibility/automation_manager_ash.h"
#endif
namespace extensions {
class AutomationWebContentsObserver;
} // namespace extensions
DEFINE_WEB_CONTENTS_USER_DATA_KEY(extensions::AutomationWebContentsObserver);
namespace {
const int kDesktopProcessID = 0;
const int kDesktopRoutingID = 0;
const char kCannotRequestAutomationOnPage[] =
"Cannot request automation tree on url \"*\". "
"Extension manifest must request permission to access this host.";
} // namespace
namespace extensions {
bool CanRequestAutomation(const Extension* extension,
const AutomationInfo* automation_info,
const content::WebContents* contents) {
if (automation_info->desktop)
return true;
const GURL& url = contents->GetURL();
// TODO(aboxhall): check for webstore URL
if (automation_info->matches.MatchesURL(url))
return true;
int tab_id = ExtensionTabUtil::GetTabId(contents);
content::RenderProcessHost* process = contents->GetRenderProcessHost();
int process_id = process ? process->GetID() : -1;
std::string unused_error;
return extension->permissions_data()->CanAccessPage(
extension, url, url, tab_id, process_id, &unused_error);
}
// Helper class that receives accessibility data from |WebContents|.
class AutomationWebContentsObserver
: public content::WebContentsObserver,
public content::WebContentsUserData<AutomationWebContentsObserver> {
public:
virtual ~AutomationWebContentsObserver() {}
// content::WebContentsObserver overrides.
virtual void AccessibilityEventReceived(
const std::vector<content::AXEventNotificationDetails>& details)
override {
automation_util::DispatchAccessibilityEventsToAutomation(
details, browser_context_,
web_contents()->GetContainerBounds().OffsetFromOrigin());
}
virtual void RenderFrameDeleted(
content::RenderFrameHost* render_frame_host) override {
automation_util::DispatchTreeDestroyedEventToAutomation(
render_frame_host->GetProcess()->GetID(),
render_frame_host->GetRoutingID(),
browser_context_);
}
private:
friend class content::WebContentsUserData<AutomationWebContentsObserver>;
AutomationWebContentsObserver(
content::WebContents* web_contents)
: content::WebContentsObserver(web_contents),
browser_context_(web_contents->GetBrowserContext()) {}
content::BrowserContext* browser_context_;
DISALLOW_COPY_AND_ASSIGN(AutomationWebContentsObserver);
};
// Helper class that implements an action adapter for a |RenderFrameHost|.
class RenderFrameHostActionAdapter : public AutomationActionAdapter {
public:
explicit RenderFrameHostActionAdapter(content::RenderFrameHost* rfh)
: rfh_(rfh) {}
virtual ~RenderFrameHostActionAdapter() {}
// AutomationActionAdapter implementation.
virtual void DoDefault(int32 id) override {
rfh_->AccessibilityDoDefaultAction(id);
}
virtual void Focus(int32 id) override {
rfh_->AccessibilitySetFocus(id);
}
virtual void MakeVisible(int32 id) override {
rfh_->AccessibilityScrollToMakeVisible(id, gfx::Rect());
}
virtual void SetSelection(int32 id, int32 start, int32 end) override {
rfh_->AccessibilitySetTextSelection(id, start, end);
}
private:
content::RenderFrameHost* rfh_;
DISALLOW_COPY_AND_ASSIGN(RenderFrameHostActionAdapter);
};
ExtensionFunction::ResponseAction
AutomationInternalEnableTabFunction::Run() {
const AutomationInfo* automation_info = AutomationInfo::Get(extension());
EXTENSION_FUNCTION_VALIDATE(automation_info);
using api::automation_internal::EnableTab::Params;
scoped_ptr<Params> params(Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params.get());
content::WebContents* contents = NULL;
if (params->tab_id.get()) {
int tab_id = *params->tab_id;
if (!ExtensionTabUtil::GetTabById(tab_id,
GetProfile(),
include_incognito(),
NULL, /* browser out param*/
NULL, /* tab_strip out param */
&contents,
NULL /* tab_index out param */)) {
return RespondNow(
Error(tabs_constants::kTabNotFoundError, base::IntToString(tab_id)));
}
} else {
contents = GetCurrentBrowser()->tab_strip_model()->GetActiveWebContents();
if (!contents)
return RespondNow(Error("No active tab"));
}
content::RenderFrameHost* rfh = contents->GetMainFrame();
if (!rfh)
return RespondNow(Error("Could not enable accessibility for active tab"));
if (!CanRequestAutomation(extension(), automation_info, contents)) {
return RespondNow(
Error(kCannotRequestAutomationOnPage, contents->GetURL().spec()));
}
AutomationWebContentsObserver::CreateForWebContents(contents);
contents->EnableTreeOnlyAccessibilityMode();
return RespondNow(
ArgumentList(api::automation_internal::EnableTab::Results::Create(
rfh->GetProcess()->GetID(), rfh->GetRoutingID())));
}
ExtensionFunction::ResponseAction
AutomationInternalPerformActionFunction::Run() {
const AutomationInfo* automation_info = AutomationInfo::Get(extension());
EXTENSION_FUNCTION_VALIDATE(automation_info && automation_info->interact);
using api::automation_internal::PerformAction::Params;
scoped_ptr<Params> params(Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params.get());
if (params->args.process_id == kDesktopProcessID &&
params->args.routing_id == kDesktopRoutingID) {
#if defined(OS_CHROMEOS)
return RouteActionToAdapter(
params.get(), AutomationManagerAsh::GetInstance());
#else
NOTREACHED();
return RespondNow(Error("Unexpected action on desktop automation tree;"
" platform does not support desktop automation"));
#endif // defined(OS_CHROMEOS)
}
content::RenderFrameHost* rfh =
content::RenderFrameHost::FromID(params->args.process_id,
params->args.routing_id);
if (!rfh)
return RespondNow(Error("Ignoring action on destroyed node"));
const content::WebContents* contents =
content::WebContents::FromRenderFrameHost(rfh);
if (!CanRequestAutomation(extension(), automation_info, contents)) {
return RespondNow(
Error(kCannotRequestAutomationOnPage, contents->GetURL().spec()));
}
RenderFrameHostActionAdapter adapter(rfh);
return RouteActionToAdapter(params.get(), &adapter);
}
ExtensionFunction::ResponseAction
AutomationInternalPerformActionFunction::RouteActionToAdapter(
api::automation_internal::PerformAction::Params* params,
AutomationActionAdapter* adapter) {
int32 automation_id = params->args.automation_node_id;
switch (params->args.action_type) {
case api::automation_internal::ACTION_TYPE_DODEFAULT:
adapter->DoDefault(automation_id);
break;
case api::automation_internal::ACTION_TYPE_FOCUS:
adapter->Focus(automation_id);
break;
case api::automation_internal::ACTION_TYPE_MAKEVISIBLE:
adapter->MakeVisible(automation_id);
break;
case api::automation_internal::ACTION_TYPE_SETSELECTION: {
api::automation_internal::SetSelectionParams selection_params;
EXTENSION_FUNCTION_VALIDATE(
api::automation_internal::SetSelectionParams::Populate(
params->opt_args.additional_properties, &selection_params));
adapter->SetSelection(automation_id,
selection_params.start_index,
selection_params.end_index);
break;
}
default:
NOTREACHED();
}
return RespondNow(NoArguments());
}
ExtensionFunction::ResponseAction
AutomationInternalEnableDesktopFunction::Run() {
#if defined(OS_CHROMEOS)
const AutomationInfo* automation_info = AutomationInfo::Get(extension());
if (!automation_info || !automation_info->desktop)
return RespondNow(Error("desktop permission must be requested"));
AutomationManagerAsh::GetInstance()->Enable(browser_context());
return RespondNow(NoArguments());
#else
return RespondNow(Error("getDesktop is unsupported by this platform"));
#endif // defined(OS_CHROMEOS)
}
} // namespace extensions
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