Support tracking focused node element for OOPIFs.

chrome/browser/renderer_host/site_per_process_text_input_browsertest.cc

 // Copyright 2016 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 <vector>
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.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 "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_client.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "content/public/test/text_input_test_utils.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "ui/base/ime/composition_underline.h"
@@ skipping 295 matching lines @@
     embedded_test_server()->ServeFilesFromSourceDirectory("content/test/data");
 
     ASSERT_TRUE(embedded_test_server()->Start());
   }
 
  protected:
   content::WebContents* active_contents() {
     return browser()->tab_strip_model()->GetActiveWebContents();
   }
 
+  content::RenderViewHost* render_view_host() {
+    return active_contents()->GetRenderViewHost();
+  }
+
   // static
   // Adds an <input> field to a given frame by executing javascript code.
   // The input can be added as the first element or the last element of
   // |document.body|. The text range defined by |selection_range| will be
   // marked.
   static void AddInputFieldToFrame(content::RenderFrameHost* rfh,
                                    const std::string& type,
                                    const std::string& value,
                                    bool append_as_first_child) {
     std::string script = base::StringPrintf(
@@ skipping 398 matching lines @@
   for (size_t i = 0; i < record_count - 1U; ++i) {
     const content::RenderWidgetHostView* current =
         recorder.active_views()->at(i);
     const content::RenderWidgetHostView* next =
         recorder.active_views()->at(i + 1U);
     EXPECT_TRUE((current != nullptr && next == nullptr) ||
                 (current == nullptr && next != nullptr));
   }
 }
 
+// This test makes sure browser correctly tracks focused editable element inside
+// each RenderFrameHost.
+IN_PROC_BROWSER_TEST_F(SitePerProcessTextInputManagerTest,
+                       TrackingFocusedElementForAllFrames) {
+  CreateIframePage("a(a, b(a))");
+  std::vector<content::RenderFrameHost*> frames{
+      GetFrame(IndexVector{}), GetFrame(IndexVector{0}),
+      GetFrame(IndexVector{1}), GetFrame(IndexVector{1, 0})};
+  for (size_t i = 0; i < frames.size(); ++i)
+    AddInputFieldToFrame(frames[i], "text", "some text", true);
+
+  // Focus the <input> in |frame| and return if RenderFrameHost thinks there is
+  // a focused editable element in it.
+  auto focus_input_and_return_editable_element_state =
+      [](content::RenderFrameHost* frame) {
+        EXPECT_TRUE(
+            ExecuteScript(frame, "document.querySelector('input').focus();"));
+        return content::DoesFrameHaveFocusedEditableElement(frame);
+      };
+
+  // When focusing an <input> we should receive an update.
+  for (auto* frame : frames)
+    EXPECT_TRUE(focus_input_and_return_editable_element_state(frame));
+
+  // Blur the <input> in |frame| and return if RenderFrameHost thinks there is a
+  // focused editable element in it.
+  auto blur_input_and_return_editable_element_state =
+      [](content::RenderFrameHost* frame) {
+        EXPECT_TRUE(
+            ExecuteScript(frame, "document.querySelector('input').blur();"));
+        return content::DoesFrameHaveFocusedEditableElement(frame);
+      };
+
+  // Similarly, we should receive updates when losing focus.
+  for (auto* frame : frames)
+    EXPECT_FALSE(blur_input_and_return_editable_element_state(frame));
+}
+
+// This test tracks page level focused editable element tracking using
+// RenderViewHost. In a page with multiple frames, a frame is selected and
+// focused. Then the <input> inside frame is both focused and blurred and  and
+// in both cases the test verifies that RendeViewHost is aware whether or not a
+// focused editable element exists on the page.
+IN_PROC_BROWSER_TEST_F(SitePerProcessTextInputManagerTest,
+                       TrackPageFocusEditableElement) {
+  CreateIframePage("a(a, b(a))");
+  std::vector<content::RenderFrameHost*> frames{
+      GetFrame(IndexVector{}), GetFrame(IndexVector{0}),
+      GetFrame(IndexVector{1}), GetFrame(IndexVector{1, 0})};
+  for (size_t i = 0; i < frames.size(); ++i)
+    AddInputFieldToFrame(frames[i], "text", "some text", true);
+
+  auto focus_frame = [](content::RenderFrameHost* frame) {
+    EXPECT_TRUE(ExecuteScript(frame, "window.focus();"));
+  };
+
+  auto set_input_focus = [](content::RenderFrameHost* frame, bool focus) {
+    EXPECT_TRUE(ExecuteScript(
+        frame, base::StringPrintf("document.querySelector('input').%s();",
+                                  (focus ? "focus" : "blur"))));
+  };
+
+  for (auto* frame : frames) {
+    focus_frame(frame);
+    // Focus the <input>.
+    set_input_focus(frame, true);
+    EXPECT_TRUE(render_view_host()->IsFocusedElementEditable());
+    // No blur <input>.
+    set_input_focus(frame, false);
+    EXPECT_FALSE(render_view_host()->IsFocusedElementEditable());
+  }
+}
+
+// TODO(ekaramad): Could this become a unit test instead?
+// This test focuses <input> elements on the page and verifies that
+// RenderViewHost knows about the focused editable element. Then it asks the
+// RenderViewHost to clear focused element and verifies that there is no longer
+// a focused editable element on the page.
+IN_PROC_BROWSER_TEST_F(SitePerProcessTextInputManagerTest,
+                       ClearFocusedElementOnPage) {
+  CreateIframePage("a(a, b(a))");
+  std::vector<content::RenderFrameHost*> frames{
+      GetFrame(IndexVector{}), GetFrame(IndexVector{0}),
+      GetFrame(IndexVector{1}), GetFrame(IndexVector{1, 0})};
+  for (size_t i = 0; i < frames.size(); ++i)
+    AddInputFieldToFrame(frames[i], "text", "some text", true);
+
+  auto focus_frame_and_input = [](content::RenderFrameHost* frame) {
+    EXPECT_TRUE(ExecuteScript(frame,
+                              "window.focus();"
+                              "document.querySelector('input').focus();"));
+  };
+
+  for (auto* frame : frames) {
+    focus_frame_and_input(frame);
+    EXPECT_TRUE(render_view_host()->IsFocusedElementEditable());
+    render_view_host()->ClearFocusedElement();
+    EXPECT_FALSE(render_view_host()->IsFocusedElementEditable());
+  }
+}
+
 // TODO(ekaramad): The following tests are specifically written for Aura and are
 // based on InputMethodObserver. Write similar tests for Mac/Android/Mus
 // (crbug.com/602723).
 
 #if defined(USE_AURA)
 // -----------------------------------------------------------------------------
 // Input Method Observer Tests
 //
 // The following tests will make use of the InputMethodObserver to verify that
 // OOPIF pages interact properly with the InputMethod through the tab's view.
@@ skipping 361 matching lines @@
   // Test ends here. The rest is cleanup.
 
   // Closing this WebContents while we still hold on to our TestBrowserClient.
   EXPECT_TRUE(browser()->tab_strip_model()->CloseWebContentsAt(
       1, TabStripModel::CLOSE_USER_GESTURE));
 
   // For the cleanup of the original WebContents in tab index 0.
   content::SetBrowserClientForTesting(old_browser_client);
 }
 #endif