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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/accessibility/accessibility_content_browsertest.h"
#include <string>
#include "base/strings/escape.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/test/accessibility_notification_waiter.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/shell/browser/shell.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "ui/accessibility/platform/browser_accessibility.h"
#include "ui/accessibility/platform/browser_accessibility_manager.h"
namespace content {
AccessibilityContentBrowserTest::AccessibilityContentBrowserTest() = default;
AccessibilityContentBrowserTest::~AccessibilityContentBrowserTest() = default;
void AccessibilityContentBrowserTest::SetUpOnMainThread() {
accessibility_mode_.emplace(ui::kAXModeComplete);
}
void AccessibilityContentBrowserTest::TearDownOnMainThread() {
accessibility_mode_.reset();
}
void AccessibilityContentBrowserTest::LoadInitialAccessibilityTreeFromUrl(
const GURL& url) {
AccessibilityNotificationWaiter waiter(GetWebContentsAndAssertNonNull(),
ax::mojom::Event::kLoadComplete);
EXPECT_TRUE(NavigateToURL(shell(), url));
ASSERT_TRUE(waiter.WaitForNotification());
}
void AccessibilityContentBrowserTest::
LoadInitialAccessibilityTreeFromHtmlFilePath(
const std::string& html_file_path) {
if (!embedded_test_server()->Started()) {
ASSERT_TRUE(embedded_test_server()->Start());
}
ASSERT_TRUE(embedded_test_server()->Started());
LoadInitialAccessibilityTreeFromUrl(
embedded_test_server()->GetURL(html_file_path));
}
void AccessibilityContentBrowserTest::LoadInitialAccessibilityTreeFromHtml(
const std::string& html) {
LoadInitialAccessibilityTreeFromUrl(
GURL("data:text/html," + base::EscapeQueryParamValue(html, false)));
}
WebContents* AccessibilityContentBrowserTest::GetWebContentsAndAssertNonNull()
const {
// Perform the null pointer validation inside a void function to allow for a
// return type.
auto GetWebContentsAndAssertNonNull = [this](WebContents** result) {
WebContents* web_contents = shell()->web_contents();
ASSERT_NE(nullptr, web_contents);
*result = web_contents;
};
WebContents* web_contents;
GetWebContentsAndAssertNonNull(&web_contents);
return web_contents;
}
WebContentsImpl*
AccessibilityContentBrowserTest::GetWebContentsImplAndAssertNonNull() const {
return static_cast<WebContentsImpl*>(GetWebContentsAndAssertNonNull());
}
ui::BrowserAccessibilityManager*
AccessibilityContentBrowserTest::GetManagerAndAssertNonNull() const {
// Perform the null pointer validation inside a void function to allow for a
// return type.
auto GetManagerAndAssertNonNull =
[this](ui::BrowserAccessibilityManager** result) {
ui::BrowserAccessibilityManager* browser_accessibility_manager =
GetWebContentsImplAndAssertNonNull()
->GetRootBrowserAccessibilityManager();
ASSERT_NE(nullptr, browser_accessibility_manager);
*result = browser_accessibility_manager;
};
ui::BrowserAccessibilityManager* browser_accessibility_manager;
GetManagerAndAssertNonNull(&browser_accessibility_manager);
return browser_accessibility_manager;
}
ui::BrowserAccessibility*
AccessibilityContentBrowserTest::GetRootAndAssertNonNull() const {
// Perform the null pointer validation inside a void function to allow for a
// return type.
auto GetRootAndAssertNonNull = [this](ui::BrowserAccessibility** result) {
ui::BrowserAccessibility* root_browser_accessibility =
GetManagerAndAssertNonNull()->GetBrowserAccessibilityRoot();
ASSERT_NE(nullptr, result);
*result = root_browser_accessibility;
};
ui::BrowserAccessibility* root_browser_accessibility;
GetRootAndAssertNonNull(&root_browser_accessibility);
return root_browser_accessibility;
}
ui::BrowserAccessibility* AccessibilityContentBrowserTest::FindNode(
const ax::mojom::Role role,
const std::string& name_or_value) const {
return FindNodeInSubtree(GetRootAndAssertNonNull(), role, name_or_value);
}
ui::BrowserAccessibility* AccessibilityContentBrowserTest::FindNodeInSubtree(
ui::BrowserAccessibility* node,
const ax::mojom::Role role,
const std::string& name_or_value) const {
const std::string& name =
node->GetStringAttribute(ax::mojom::StringAttribute::kName);
// Note that in the case of a text field,
// "BrowserAccessibility::GetValueForControl" has the added functionality of
// computing the value of an ARIA text box from its inner text.
//
// <div contenteditable="true" role="textbox">Hello world.</div>
// Will expose no HTML value attribute, but some screen readers, such as Jaws,
// VoiceOver and Talkback, require one to be computed.
const std::string value = base::UTF16ToUTF8(node->GetValueForControl());
if (node->GetRole() == role &&
(name == name_or_value || value == name_or_value)) {
return node;
}
for (uint32_t i = 0; i < node->PlatformChildCount(); ++i) {
ui::BrowserAccessibility* result =
FindNodeInSubtree(node->PlatformGetChild(i), role, name_or_value);
if (result) {
return result;
}
}
return nullptr;
}
} // namespace content
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