content/browser/accessibility/android_granularity_movement_browsertest.cc - chromium/src - Git at Google

 // 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 <set>
 #include <string>
 #include <vector>

 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_android.h"
 #include "content/browser/accessibility/browser_accessibility_manager_android.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "content/test/accessibility_browser_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"

 namespace content {

 const int GRANULARITY_CHARACTER =
     ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_CHARACTER;
 const int GRANULARITY_WORD =
     ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_WORD;
 const int GRANULARITY_LINE =
     ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_LINE;

 class AndroidGranularityMovementBrowserTest : public ContentBrowserTest {
  public:
   AndroidGranularityMovementBrowserTest() {}
   ~AndroidGranularityMovementBrowserTest() override {}

   BrowserAccessibility* LoadUrlAndGetAccessibilityRoot(const GURL& url) {
     NavigateToURL(shell(), GURL(url::kAboutBlankURL));

     // Load the page.
     AccessibilityNotificationWaiter waiter(
         shell(), AccessibilityModeComplete,
         ui::AX_EVENT_LOAD_COMPLETE);
     NavigateToURL(shell(), url);
     waiter.WaitForNotification();

     // Get the BrowserAccessibilityManager.
     WebContentsImpl* web_contents =
         static_cast<WebContentsImpl*>(shell()->web_contents());
     return web_contents->GetRootBrowserAccessibilityManager()->GetRoot();
   }

   // First, set accessibility focus to a node and wait for the update that
   // loads inline text boxes for that node. (We load inline text boxes
   // asynchronously on Android since we only ever need them for the node
   // with accessibility focus.)
   //
   // Then call NextAtGranularity repeatedly and return a string that
   // concatenates all of the text of the returned text ranges.
   //
   // As an example, if the node's text is "cat dog" and you traverse by
   // word, this returns "'cat', 'dog'".
   //
   // Also calls PreviousAtGranularity from the end back to the beginning
   // and fails (by logging an error and returning the empty string) if
   // the result when traversing backwards is not the same
   // (but in reverse order).
   base::string16 TraverseNodeAtGranularity(
       BrowserAccessibility* node,
       int granularity) {
     AccessibilityNotificationWaiter waiter(
         shell(), AccessibilityModeComplete,
         ui::AX_EVENT_TREE_CHANGED);
     node->manager()->delegate()->AccessibilitySetAccessibilityFocus(
         node->GetId());
     waiter.WaitForNotification();

     int start_index = -1;
     int end_index = -1;
     BrowserAccessibilityAndroid* android_node =
         static_cast<BrowserAccessibilityAndroid*>(node);
     BrowserAccessibilityManagerAndroid* manager =
         static_cast<BrowserAccessibilityManagerAndroid*>(node->manager());
     base::string16 text = android_node->GetText();
     base::string16 concatenated;
     int previous_end_index = -1;
     while (manager->NextAtGranularity(
                granularity, end_index, android_node,
                &start_index, &end_index)) {
       int len = (granularity == GRANULARITY_CHARACTER) ?
           1 : end_index - start_index;
       base::string16 selection = text.substr(start_index, len);
       if (EndsWith(selection, base::ASCIIToUTF16("\n"), false))
         selection.erase(selection.size() - 1);
       if (!selection.empty()) {
         if (!concatenated.empty())
           concatenated += base::ASCIIToUTF16(", ");
         concatenated += base::ASCIIToUTF16("'") + selection +
             base::ASCIIToUTF16("'");
       }

       // Prevent an endless loop.
       if (end_index == previous_end_index) {
         LOG(ERROR) << "Bailing from loop, NextAtGranularity didn't advance";
         break;
       }
       previous_end_index = end_index;
     }

     base::string16 reverse;
     previous_end_index = -1;
     start_index = end_index;
     while (manager->PreviousAtGranularity(
         granularity, start_index, android_node, &start_index, &end_index)) {
       int len = (granularity == GRANULARITY_CHARACTER) ?
           1 : end_index - start_index;
       base::string16 selection = text.substr(start_index, len);
       if (EndsWith(selection, base::ASCIIToUTF16("\n"), false))
         selection = selection.substr(0, selection.size() - 1);
       if (!reverse.empty())
         reverse = base::ASCIIToUTF16(", ") + reverse;
       reverse = base::ASCIIToUTF16("'") + selection +
           base::ASCIIToUTF16("'") + reverse;

       // Prevent an endless loop.
       if (end_index == previous_end_index) {
         LOG(ERROR) << "Bailing from loop, PreviousAtGranularity didn't advance";
         break;
       }
       previous_end_index = end_index;
     }

     if (concatenated != reverse) {
       LOG(ERROR) << "Did not get the same sequence in the forwards and "
                  << "reverse directions!";
       LOG(ERROR) << "Forwards: " << concatenated;
       LOG(ERROR) << "Backwards " << reverse;
       return base::string16();
     }

     return concatenated;
   }
 };

 IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
                        NavigateByCharacters) {
   GURL url("data:text/html,"
            "<body>"
            "<p>One, two, three!</p>"
            "<button aria-label='Seven, eight, nine!'>Four, five, six!</button>"
            "</body></html>");
   BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
   ASSERT_EQ(2U, root->PlatformChildCount());
   BrowserAccessibility* para = root->PlatformGetChild(0);
   ASSERT_EQ(0U, para->PlatformChildCount());
   BrowserAccessibility* button_container = root->PlatformGetChild(1);
   ASSERT_EQ(1U, button_container->PlatformChildCount());
   BrowserAccessibility* button = button_container->PlatformGetChild(0);
   ASSERT_EQ(0U, button->PlatformChildCount());

   ASSERT_EQ(
       base::ASCIIToUTF16("'O', 'n', 'e', ',', ' ', 't', 'w', 'o', "
                          "',', ' ', 't', 'h', 'r', 'e', 'e', '!'"),
       TraverseNodeAtGranularity(para, GRANULARITY_CHARACTER));
   ASSERT_EQ(
       base::ASCIIToUTF16("'S', 'e', 'v', 'e', 'n', ',', ' ', 'e', 'i', 'g', "
                          "'h', 't', ',', ' ', 'n', 'i', 'n', 'e', '!'"),
       TraverseNodeAtGranularity(button, GRANULARITY_CHARACTER));
 }

 IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
                        NavigateByWords) {
   GURL url("data:text/html,"
            "<body>"
            "<p>One, two, three!</p>"
            "<button aria-label='Seven, eight, nine!'>Four, five, six!</button>"
            "</body></html>");
   BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
   ASSERT_EQ(2U, root->PlatformChildCount());
   BrowserAccessibility* para = root->PlatformGetChild(0);
   ASSERT_EQ(0U, para->PlatformChildCount());
   BrowserAccessibility* button_container = root->PlatformGetChild(1);
   ASSERT_EQ(1U, button_container->PlatformChildCount());
   BrowserAccessibility* button = button_container->PlatformGetChild(0);
   ASSERT_EQ(0U, button->PlatformChildCount());

   ASSERT_EQ(base::ASCIIToUTF16("'One', 'two', 'three'"),
             TraverseNodeAtGranularity(para, GRANULARITY_WORD));
   ASSERT_EQ(base::ASCIIToUTF16("'Seven', 'eight', 'nine'"),
             TraverseNodeAtGranularity(button, GRANULARITY_WORD));
 }

 IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
                        NavigateByLine) {
   GURL url("data:text/html,"
            "<body>"
            "<pre>One,%0dtwo,%0dthree!</pre>"
            "</body>");
   BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
   ASSERT_EQ(1U, root->PlatformChildCount());
   BrowserAccessibility* pre = root->PlatformGetChild(0);
   ASSERT_EQ(0U, pre->PlatformChildCount());

   ASSERT_EQ(base::ASCIIToUTF16("'One,', 'two,', 'three!'"),
             TraverseNodeAtGranularity(pre, GRANULARITY_LINE));
 }

 }  // namespace content
	// 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 <set>
	#include <string>
	#include <vector>

	#include "base/logging.h"
	#include "base/strings/string16.h"
	#include "base/strings/string_util.h"
	#include "base/strings/utf_string_conversions.h"
	#include "content/browser/accessibility/browser_accessibility_android.h"
	#include "content/browser/accessibility/browser_accessibility_manager_android.h"
	#include "content/browser/web_contents/web_contents_impl.h"
	#include "content/public/browser/web_contents.h"
	#include "content/public/common/url_constants.h"
	#include "content/public/test/content_browser_test.h"
	#include "content/public/test/content_browser_test_utils.h"
	#include "content/shell/browser/shell.h"
	#include "content/test/accessibility_browser_test_utils.h"
	#include "testing/gtest/include/gtest/gtest.h"

	namespace content {

	const int GRANULARITY_CHARACTER =
	ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_CHARACTER;
	const int GRANULARITY_WORD =
	ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_WORD;
	const int GRANULARITY_LINE =
	ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_LINE;

	class AndroidGranularityMovementBrowserTest : public ContentBrowserTest {
	public:
	AndroidGranularityMovementBrowserTest() {}
	~AndroidGranularityMovementBrowserTest() override {}

	BrowserAccessibility* LoadUrlAndGetAccessibilityRoot(const GURL& url) {
	NavigateToURL(shell(), GURL(url::kAboutBlankURL));

	// Load the page.
	AccessibilityNotificationWaiter waiter(
	shell(), AccessibilityModeComplete,
	ui::AX_EVENT_LOAD_COMPLETE);
	NavigateToURL(shell(), url);
	waiter.WaitForNotification();

	// Get the BrowserAccessibilityManager.
	WebContentsImpl* web_contents =
	static_cast<WebContentsImpl*>(shell()->web_contents());
	return web_contents->GetRootBrowserAccessibilityManager()->GetRoot();
	}

	// First, set accessibility focus to a node and wait for the update that
	// loads inline text boxes for that node. (We load inline text boxes
	// asynchronously on Android since we only ever need them for the node
	// with accessibility focus.)
	//
	// Then call NextAtGranularity repeatedly and return a string that
	// concatenates all of the text of the returned text ranges.
	//
	// As an example, if the node's text is "cat dog" and you traverse by
	// word, this returns "'cat', 'dog'".
	//
	// Also calls PreviousAtGranularity from the end back to the beginning
	// and fails (by logging an error and returning the empty string) if
	// the result when traversing backwards is not the same
	// (but in reverse order).
	base::string16 TraverseNodeAtGranularity(
	BrowserAccessibility* node,
	int granularity) {
	AccessibilityNotificationWaiter waiter(
	shell(), AccessibilityModeComplete,
	ui::AX_EVENT_TREE_CHANGED);
	node->manager()->delegate()->AccessibilitySetAccessibilityFocus(
	node->GetId());
	waiter.WaitForNotification();

	int start_index = -1;
	int end_index = -1;
	BrowserAccessibilityAndroid* android_node =
	static_cast<BrowserAccessibilityAndroid*>(node);
	BrowserAccessibilityManagerAndroid* manager =
	static_cast<BrowserAccessibilityManagerAndroid*>(node->manager());
	base::string16 text = android_node->GetText();
	base::string16 concatenated;
	int previous_end_index = -1;
	while (manager->NextAtGranularity(
	granularity, end_index, android_node,
	&start_index, &end_index)) {
	int len = (granularity == GRANULARITY_CHARACTER) ?
	1 : end_index - start_index;
	base::string16 selection = text.substr(start_index, len);
	if (EndsWith(selection, base::ASCIIToUTF16("\n"), false))
	selection.erase(selection.size() - 1);
	if (!selection.empty()) {
	if (!concatenated.empty())
	concatenated += base::ASCIIToUTF16(", ");
	concatenated += base::ASCIIToUTF16("'") + selection +
	base::ASCIIToUTF16("'");
	}

	// Prevent an endless loop.
	if (end_index == previous_end_index) {
	LOG(ERROR) << "Bailing from loop, NextAtGranularity didn't advance";
	break;
	}
	previous_end_index = end_index;
	}

	base::string16 reverse;
	previous_end_index = -1;
	start_index = end_index;
	while (manager->PreviousAtGranularity(
	granularity, start_index, android_node, &start_index, &end_index)) {
	int len = (granularity == GRANULARITY_CHARACTER) ?
	1 : end_index - start_index;
	base::string16 selection = text.substr(start_index, len);
	if (EndsWith(selection, base::ASCIIToUTF16("\n"), false))
	selection = selection.substr(0, selection.size() - 1);
	if (!reverse.empty())
	reverse = base::ASCIIToUTF16(", ") + reverse;
	reverse = base::ASCIIToUTF16("'") + selection +
	base::ASCIIToUTF16("'") + reverse;

	// Prevent an endless loop.
	if (end_index == previous_end_index) {
	LOG(ERROR) << "Bailing from loop, PreviousAtGranularity didn't advance";
	break;
	}
	previous_end_index = end_index;
	}

	if (concatenated != reverse) {
	LOG(ERROR) << "Did not get the same sequence in the forwards and "
	<< "reverse directions!";
	LOG(ERROR) << "Forwards: " << concatenated;
	LOG(ERROR) << "Backwards " << reverse;
	return base::string16();
	}

	return concatenated;
	}
	};

	IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
	NavigateByCharacters) {
	GURL url("data:text/html,"
	"<body>"
	"<p>One, two, three!</p>"
	"<button aria-label='Seven, eight, nine!'>Four, five, six!</button>"
	"</body></html>");
	BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
	ASSERT_EQ(2U, root->PlatformChildCount());
	BrowserAccessibility* para = root->PlatformGetChild(0);
	ASSERT_EQ(0U, para->PlatformChildCount());
	BrowserAccessibility* button_container = root->PlatformGetChild(1);
	ASSERT_EQ(1U, button_container->PlatformChildCount());
	BrowserAccessibility* button = button_container->PlatformGetChild(0);
	ASSERT_EQ(0U, button->PlatformChildCount());

	ASSERT_EQ(
	base::ASCIIToUTF16("'O', 'n', 'e', ',', ' ', 't', 'w', 'o', "
	"',', ' ', 't', 'h', 'r', 'e', 'e', '!'"),
	TraverseNodeAtGranularity(para, GRANULARITY_CHARACTER));
	ASSERT_EQ(
	base::ASCIIToUTF16("'S', 'e', 'v', 'e', 'n', ',', ' ', 'e', 'i', 'g', "
	"'h', 't', ',', ' ', 'n', 'i', 'n', 'e', '!'"),
	TraverseNodeAtGranularity(button, GRANULARITY_CHARACTER));
	}

	IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
	NavigateByWords) {
	GURL url("data:text/html,"
	"<body>"
	"<p>One, two, three!</p>"
	"<button aria-label='Seven, eight, nine!'>Four, five, six!</button>"
	"</body></html>");
	BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
	ASSERT_EQ(2U, root->PlatformChildCount());
	BrowserAccessibility* para = root->PlatformGetChild(0);
	ASSERT_EQ(0U, para->PlatformChildCount());
	BrowserAccessibility* button_container = root->PlatformGetChild(1);
	ASSERT_EQ(1U, button_container->PlatformChildCount());
	BrowserAccessibility* button = button_container->PlatformGetChild(0);
	ASSERT_EQ(0U, button->PlatformChildCount());

	ASSERT_EQ(base::ASCIIToUTF16("'One', 'two', 'three'"),
	TraverseNodeAtGranularity(para, GRANULARITY_WORD));
	ASSERT_EQ(base::ASCIIToUTF16("'Seven', 'eight', 'nine'"),
	TraverseNodeAtGranularity(button, GRANULARITY_WORD));
	}

	IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
	NavigateByLine) {
	GURL url("data:text/html,"
	"<body>"
	"<pre>One,%0dtwo,%0dthree!</pre>"
	"</body>");
	BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
	ASSERT_EQ(1U, root->PlatformChildCount());
	BrowserAccessibility* pre = root->PlatformGetChild(0);
	ASSERT_EQ(0U, pre->PlatformChildCount());

	ASSERT_EQ(base::ASCIIToUTF16("'One,', 'two,', 'three!'"),
	TraverseNodeAtGranularity(pre, GRANULARITY_LINE));
	}

	} // namespace content