Tabs being screen-captured will fullscreen within their tab contents area.

chrome/browser/ui/fullscreen/fullscreen_controller_state_unittest.cc

 // Copyright (c) 2012 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 "base/command_line.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_controller.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_controller_state_test.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_view.h"
 #include "content/public/common/url_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // The FullscreenControllerStateUnitTest unit test suite exhastively tests
 // the FullscreenController through all permutations of events. The behavior
 // of the BrowserWindow is mocked via FullscreenControllerTestWindow.
 
 
 // FullscreenControllerTestWindow ----------------------------------------------
 
@@ skipping 443 matching lines @@
   ASSERT_TRUE(browser()->window()->IsFullscreen());
 
   content::WebContents* new_web_contents = content::WebContents::Create(
       content::WebContents::CreateParams(profile()));
   scoped_ptr<content::WebContents> old_web_contents(
       browser()->tab_strip_model()->ReplaceWebContentsAt(
           0, new_web_contents));
   ChangeWindowFullscreenState();
   EXPECT_FALSE(browser()->window()->IsFullscreen());
 }
+
+TEST_F(FullscreenControllerStateUnitTest, OneCapturedFullscreenedTab) {

[scheib, 2014/02/12 01:41:16]

Please comment the intent of each test and reference the definition of
'CapturedFullscreenedTab' (can this be consistent also, e.g.
'EmbeddedFullscreen'?).

[miu, 2014/02/12 08:25:19]

Done.

+  CommandLine::ForCurrentProcess()->
+      AppendSwitch(switches::kEmbedFlashFullscreen);
+  content::WebContentsDelegate* const wc_delegate =
+      static_cast<content::WebContentsDelegate*>(browser());
+  ASSERT_TRUE(wc_delegate->EmbedsFullscreenWidget());
+
+  AddTab(browser(), GURL(content::kAboutBlankURL));
+  AddTab(browser(), GURL(content::kAboutBlankURL));
+  content::WebContents* const first_tab =
+      browser()->tab_strip_model()->GetWebContentsAt(0);
+  content::WebContents* const second_tab =
+      browser()->tab_strip_model()->GetWebContentsAt(1);
+
+  // Activate the first tab and tell its WebContents it is being captured.
+  browser()->tab_strip_model()->ActivateTabAt(0, true);
+  const gfx::Size kCaptureSize(1280, 720);
+  first_tab->IncrementCapturerCount(kCaptureSize);
+  ASSERT_FALSE(browser()->window()->IsFullscreen());
+  ASSERT_FALSE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  ASSERT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));

[scheib, 2014/02/12 01:41:16]

Add assert for "IsFullscreenForTabOrPending()"?

[miu, 2014/02/12 08:25:19]

Done, and throughout all these new tests.

+
+  // Enter tab fullscreen.  Since the tab is being captured, the browser window
+  // should not expand to fill the screen.
+  ASSERT_TRUE(InvokeEvent(TAB_FULLSCREEN_TRUE));
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+
+  // Switch to the other tab.  Check that the first tab was resized to the
+  // WebContents' preferred size.
+  browser()->tab_strip_model()->ActivateTabAt(1, true);
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+  EXPECT_EQ(kCaptureSize, first_tab->GetView()->GetViewBounds().size());
+
+  // Switch back to the first tab and exit fullscreen.

[scheib, 2014/02/12 01:41:16]

What size should it be now?

[miu, 2014/02/12 08:25:19]

It can't be determined in these tests since we've mocked the Browser window.  As
explained in fullscreen_controller.cc, when the tab is selected, the attaching
of the widget to the UI will force a resize.

+  browser()->tab_strip_model()->ActivateTabAt(0, true);
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+  ASSERT_TRUE(InvokeEvent(TAB_FULLSCREEN_FALSE));
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+}
+
+TEST_F(FullscreenControllerStateUnitTest, TwoFullscreenedTabsOneCaptured) {
+  CommandLine::ForCurrentProcess()->
+      AppendSwitch(switches::kEmbedFlashFullscreen);
+  content::WebContentsDelegate* const wc_delegate =
+      static_cast<content::WebContentsDelegate*>(browser());
+  ASSERT_TRUE(wc_delegate->EmbedsFullscreenWidget());
+
+  AddTab(browser(), GURL(content::kAboutBlankURL));
+  AddTab(browser(), GURL(content::kAboutBlankURL));
+  content::WebContents* const first_tab =
+      browser()->tab_strip_model()->GetWebContentsAt(0);
+  content::WebContents* const second_tab =
+      browser()->tab_strip_model()->GetWebContentsAt(1);
+
+  // Start capturing the first tab, fullscreen it, then switch to the second tab
+  // and fullscreen that.  The second tab will cause the browser window to
+  // expand to fill the screen.
+  browser()->tab_strip_model()->ActivateTabAt(0, true);
+  const gfx::Size kCaptureSize(1280, 720);
+  first_tab->IncrementCapturerCount(kCaptureSize);
+  ASSERT_TRUE(InvokeEvent(TAB_FULLSCREEN_TRUE));
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+  browser()->tab_strip_model()->ActivateTabAt(1, true);
+  ASSERT_TRUE(InvokeEvent(TAB_FULLSCREEN_TRUE));
+  ASSERT_TRUE(InvokeEvent(WINDOW_CHANGE));
+  EXPECT_TRUE(browser()->window()->IsFullscreen());
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+
+  // Now exit fullscreen while still in the second tab.  The browser window
+  // should no longer be fullscreened.
+  ASSERT_TRUE(InvokeEvent(TAB_FULLSCREEN_FALSE));
+  ASSERT_TRUE(InvokeEvent(WINDOW_CHANGE));
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_TRUE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+
+  // Finally, exit fullscreen on the captured tab.
+  browser()->tab_strip_model()->ActivateTabAt(0, true);
+  ASSERT_TRUE(InvokeEvent(TAB_FULLSCREEN_FALSE));
+  EXPECT_FALSE(browser()->window()->IsFullscreen());
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(first_tab));
+  EXPECT_FALSE(wc_delegate->IsFullscreenForTabOrPending(second_tab));
+}

[scheib, 2014/02/12 01:41:16]

Some other test scenarios:
- Tab already fullscreen starts to be captured
- Captured tab in background exits fullscreen while a non captured tab in
forground remains fullscreen
- Captured tab is in fullscreen, then user attempts to enter browser fullscreen
(not sure what happens here? Are we still showing UI for browser fullscreen?)

[miu, 2014/02/12 08:25:19]

Done, except for the first scenario because there's no event mechanism to signal
FullscreenController that tab capture has started.  This is actually okay, since
tab capture can only be started via extension APIs, and only in response to a
user input event in a browser action widget.  Therefore, it shouldn't be
possible to start capture after a tab enters fullscreen.