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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <oleacc.h>
#include <wrl/client.h>
#include "base/containers/circular_deque.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/scoped_bstr.h"
#include "base/win/scoped_com_initializer.h"
#include "base/win/scoped_variant.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/browser/ui/views/omnibox/omnibox_view_views.h"
#include "chrome/browser/ui/views/toolbar/toolbar_view.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/interactive_test_utils.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/omnibox/browser/omnibox_view.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/scoped_accessibility_mode_override.h"
#include "net/dns/mock_host_resolver.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/accessibility/ax_mode.h"
#include "ui/base/test/ui_controls.h"
#include "url/gurl.h"
// We could move this into a utility file in the future if it ends up
// being useful to other tests.
class WinAccessibilityEventMonitor {
public:
WinAccessibilityEventMonitor(UINT event_min, UINT event_max);
WinAccessibilityEventMonitor(const WinAccessibilityEventMonitor&) = delete;
WinAccessibilityEventMonitor& operator=(const WinAccessibilityEventMonitor&) =
delete;
~WinAccessibilityEventMonitor();
// Blocks until the next event is received. When it's received, it
// queries accessibility information about the object that fired the
// event and populates the event, hwnd, role, state, and name in the
// passed arguments.
void WaitForNextEvent(DWORD* out_event,
HWND* out_hwnd,
UINT* out_role,
UINT* out_state,
std::string* out_name);
private:
void OnWinEventHook(HWINEVENTHOOK handle,
DWORD event,
HWND hwnd,
LONG obj_id,
LONG child_id,
DWORD event_thread,
DWORD event_time);
static void CALLBACK WinEventHookThunk(HWINEVENTHOOK handle,
DWORD event,
HWND hwnd,
LONG obj_id,
LONG child_id,
DWORD event_thread,
DWORD event_time);
struct EventInfo {
DWORD event;
HWND hwnd;
LONG obj_id;
LONG child_id;
};
base::circular_deque<EventInfo> event_queue_;
scoped_refptr<content::MessageLoopRunner> loop_runner_;
HWINEVENTHOOK win_event_hook_handle_;
static WinAccessibilityEventMonitor* instance_;
};
// static
WinAccessibilityEventMonitor* WinAccessibilityEventMonitor::instance_ = NULL;
WinAccessibilityEventMonitor::WinAccessibilityEventMonitor(UINT event_min,
UINT event_max) {
CHECK(!instance_) << "There can be only one instance of"
<< " WinAccessibilityEventMonitor at a time.";
instance_ = this;
win_event_hook_handle_ = SetWinEventHook(
event_min, event_max, NULL,
&WinAccessibilityEventMonitor::WinEventHookThunk, GetCurrentProcessId(),
0, // Hook all threads
WINEVENT_OUTOFCONTEXT);
}
WinAccessibilityEventMonitor::~WinAccessibilityEventMonitor() {
UnhookWinEvent(win_event_hook_handle_);
instance_ = NULL;
}
void WinAccessibilityEventMonitor::WaitForNextEvent(DWORD* out_event,
HWND* out_hwnd,
UINT* out_role,
UINT* out_state,
std::string* out_name) {
if (event_queue_.empty()) {
loop_runner_ = new content::MessageLoopRunner();
loop_runner_->Run();
loop_runner_.reset();
}
EventInfo event_info = event_queue_.front();
event_queue_.pop_front();
*out_event = event_info.event;
*out_hwnd = event_info.hwnd;
Microsoft::WRL::ComPtr<IAccessible> acc_obj;
base::win::ScopedVariant child_variant;
CHECK(S_OK == AccessibleObjectFromEvent(event_info.hwnd, event_info.obj_id,
event_info.child_id, &acc_obj,
child_variant.Receive()));
base::win::ScopedVariant role_variant;
if (S_OK == acc_obj->get_accRole(child_variant, role_variant.Receive())) {
*out_role = V_I4(role_variant.ptr());
} else {
*out_role = 0;
}
base::win::ScopedVariant state_variant;
if (S_OK == acc_obj->get_accState(child_variant, state_variant.Receive())) {
*out_state = V_I4(state_variant.ptr());
} else {
*out_state = 0;
}
base::win::ScopedBstr name_bstr;
HRESULT hr = acc_obj->get_accName(child_variant, name_bstr.Receive());
if (S_OK == hr) {
*out_name = base::WideToUTF8(name_bstr.Get());
} else {
*out_name = "";
}
}
void WinAccessibilityEventMonitor::OnWinEventHook(HWINEVENTHOOK handle,
DWORD event,
HWND hwnd,
LONG obj_id,
LONG child_id,
DWORD event_thread,
DWORD event_time) {
EventInfo event_info;
event_info.event = event;
event_info.hwnd = hwnd;
event_info.obj_id = obj_id;
event_info.child_id = child_id;
event_queue_.push_back(event_info);
if (loop_runner_.get()) {
loop_runner_->Quit();
}
}
// static
void CALLBACK
WinAccessibilityEventMonitor::WinEventHookThunk(HWINEVENTHOOK handle,
DWORD event,
HWND hwnd,
LONG obj_id,
LONG child_id,
DWORD event_thread,
DWORD event_time) {
if (instance_) {
instance_->OnWinEventHook(handle, event, hwnd, obj_id, child_id,
event_thread, event_time);
}
}
class NavigationAccessibilityTest : public InProcessBrowserTest {
public:
NavigationAccessibilityTest(const NavigationAccessibilityTest&) = delete;
NavigationAccessibilityTest& operator=(const NavigationAccessibilityTest&) =
delete;
protected:
NavigationAccessibilityTest() = default;
~NavigationAccessibilityTest() override = default;
void SetUpOnMainThread() override {
host_resolver()->AddRule("*", "127.0.0.1");
}
void SendKeyPress(ui::KeyboardCode key) {
gfx::NativeWindow native_window = browser()->window()->GetNativeWindow();
ASSERT_NO_FATAL_FAILURE(ASSERT_TRUE(ui_test_utils::SendKeyPressToWindowSync(
native_window, key, false, false, false, false)));
}
private:
base::win::ScopedCOMInitializer com_initializer_;
};
// Tests that when focus is in the omnibox and the user types a url and
// presses enter, no focus events are sent on the old document.
// Disabled due to flaky CHECK failures in
// WinAccessibilityEventMonitor::WaitForNextEvent; see https://crbug.com/791981.
IN_PROC_BROWSER_TEST_F(NavigationAccessibilityTest,
DISABLED_TestNavigateToNewUrl) {
content::ScopedAccessibilityModeOverride scoped_mode(ui::kAXModeComplete);
ASSERT_TRUE(ui_test_utils::NavigateToURL(
browser(), GURL("data:text/html;charset=utf-8,"
"<head><title>First Page</title></head>")));
chrome::ExecuteCommand(browser(), IDC_FOCUS_LOCATION);
ASSERT_TRUE(embedded_test_server()->Start());
GURL main_url(embedded_test_server()->GetURL("/english_page.html"));
OmniboxViewViews* omnibox_view =
BrowserView::GetBrowserViewForBrowser(browser())
->toolbar()
->location_bar()
->omnibox_view();
omnibox_view->SetUserText(base::UTF8ToUTF16(main_url.spec()), false);
WinAccessibilityEventMonitor monitor(EVENT_OBJECT_FOCUS, EVENT_OBJECT_FOCUS);
SendKeyPress(ui::VKEY_RETURN);
for (;;) {
DWORD event;
HWND hwnd;
UINT role;
UINT state;
std::string name;
monitor.WaitForNextEvent(&event, &hwnd, &role, &state, &name);
LOG(INFO) << "Got event: " << " event=" << event << " hwnd=" << hwnd
<< " role=" << role << " state=" << state << " name=" << name;
// We should get only focus events.
EXPECT_EQ(static_cast<DWORD>(EVENT_OBJECT_FOCUS), event);
// We should get only focus events on document objects. (On a page with
// JavaScript or autofocus, additional focus events would be expected.)
EXPECT_EQ(static_cast<DWORD>(ROLE_SYSTEM_DOCUMENT), role);
// We shouldn't get any events on the first page because from the time
// we start monitoring, the user has already initiated a load to the
// second page.
EXPECT_NE("First Page", name);
// Finish when we get an event on the second page.
if (name == "This page is in English") {
LOG(INFO) << "Got event on second page, finishing test.";
break;
}
}
}
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