Factor out the layout code from OpaqueBrowserFrameView for testing.

chrome/browser/ui/views/frame/opaque_browser_frame_view_layout_unittest.cc

Index: chrome/browser/ui/views/frame/opaque_browser_frame_view_layout_unittest.cc
diff --git a/chrome/browser/ui/views/frame/opaque_browser_frame_view_layout_unittest.cc b/chrome/browser/ui/views/frame/opaque_browser_frame_view_layout_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d100bc7d5ceebc1488197b68a2231968db7c0b53
--- /dev/null
+++ b/chrome/browser/ui/views/frame/opaque_browser_frame_view_layout_unittest.cc
@@ -0,0 +1,303 @@
+// Copyright (c) 2013 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 "chrome/browser/ui/views/frame/opaque_browser_frame_view_layout.h"
+
+#include "base/basictypes.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/ui/views/tab_icon_view.h"
+#include "chrome/browser/ui/views/tabs/tab.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/image/image_skia_rep.h"
+#include "ui/gfx/text_constants.h"
+#include "ui/views/controls/button/image_button.h"
+#include "ui/views/controls/button/menu_button.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/test/views_test_base.h"
+
+using views::Widget;
+
+namespace {
+
+const int kWidth = 500;
+
+class TestLayoutDelegate : public OpaqueBrowserFrameViewLayoutDelegate {
+ public:
+  enum WindowState {
+    STATE_NORMAL,
+    STATE_MAXIMIZED,
+    STATE_MINIMIZED,
+    STATE_FULLSCREEN
+  };
+
+  TestLayoutDelegate()
+      : show_avatar_(false),
+        window_state_(STATE_NORMAL) {
+  }
+
+  virtual ~TestLayoutDelegate() {}
+
+  void SetWindowTitle(const base::string16& title) {
+    window_title_ = title;
+  }
+
+  void SetShouldShowAvatar(bool show_avatar) {
+    show_avatar_ = show_avatar;
+  }
+
+  void SetWindowState(WindowState state) {
+    window_state_ = state;
+  }
+
+  virtual bool ShouldShowWindowIcon() const OVERRIDE {
+    return !window_title_.empty();
+  }
+
+  virtual bool ShouldShowWindowTitle() const OVERRIDE {
+    return !window_title_.empty();
+  }
+
+  virtual base::string16 GetWindowTitle() const OVERRIDE {
+    return window_title_;
+  }
+
+  virtual int GetIconSize() const OVERRIDE {
+    // The value on linux_aura and non-aura windows.
+    return 17;
+  }
+
+  virtual bool ShouldLeaveOffsetNearTopBorder() const OVERRIDE {
+    return !IsMaximized();
+  }
+
+  virtual gfx::Size GetBrowserViewMinimumSize() const OVERRIDE {
+    // Taken from a calculation in BrowserViewLayout.
+    return gfx::Size(168, 64);
+  }
+
+  virtual bool ShouldShowAvatar() const OVERRIDE {
+    return show_avatar_;
+  }
+
+  virtual gfx::ImageSkia GetOTRAvatarIcon() const OVERRIDE {
+    // The calculations depend on the size of the OTR resource, and chromeos
+    // uses a different sized image, so hard code the size of the current
+    // windows/linux one.
+    gfx::ImageSkiaRep rep(gfx::Size(40, 29), ui::SCALE_FACTOR_100P);
+    gfx::ImageSkia image(rep);
+    return image;
+  }
+
+  virtual bool IsMaximized() const OVERRIDE {
+    return window_state_ == STATE_MAXIMIZED;
+  }
+
+  virtual bool IsMinimized() const OVERRIDE {
+    return window_state_ == STATE_MINIMIZED;
+  }
+
+  virtual bool IsFullscreen() const OVERRIDE {
+    return window_state_ == STATE_FULLSCREEN;
+  }
+
+  virtual bool IsTabStripVisible() const OVERRIDE {
+    return window_title_.empty();
+  }
+
+  virtual int GetTabStripHeight() const OVERRIDE {
+    return IsTabStripVisible() ? Tab::GetMinimumUnselectedSize().height() : 0;
+  }
+
+  virtual int GetAdditionalReservedSpaceInTabStrip() const OVERRIDE {
+    return 0;
+  }
+
+  virtual gfx::Size GetTabstripPreferredSize() const OVERRIDE {
+    // Measured from Tabstrip::GetPreferredSize().
+    return IsTabStripVisible() ? gfx::Size(78, 29) : gfx::Size(0, 0);
+  }
+
+ private:
+  base::string16 window_title_;
+  bool show_avatar_;
+  WindowState window_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestLayoutDelegate);
+};
+
+}  // namespace
+
+class OpaqueBrowserFrameViewLayoutTest : public views::ViewsTestBase {
+ public:
+  OpaqueBrowserFrameViewLayoutTest() {}
+  virtual ~OpaqueBrowserFrameViewLayoutTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    views::ViewsTestBase::SetUp();
+
+    delegate_ = new TestLayoutDelegate;
+    layout_manager_ = new OpaqueBrowserFrameViewLayout(delegate_);
+    widget_ = new Widget;
+    widget_->Init(CreateParams(Widget::InitParams::TYPE_POPUP));
+    root_view_ = widget_->GetRootView();
+    root_view_->SetSize(gfx::Size(kWidth, kWidth));
+    root_view_->SetLayoutManager(layout_manager_);
+
+    // Add the caption buttons. We use fake images because we're modeling the
+    // Windows assets here, while the linux version uses differently sized
+    // assets.
+    //
+    // TODO(erg): In a follow up patch, separate these sizes out into virtual
+    // accessors so we can test both the windows and linux behaviours once we
+    // start modifying the code.
+    minimize_button_ = InitWindowCaptionButton(
+        VIEW_ID_MINIMIZE_BUTTON, gfx::Size(26, 18));
+    maximize_button_ = InitWindowCaptionButton(
+        VIEW_ID_MAXIMIZE_BUTTON, gfx::Size(25, 18));
+    restore_button_ = InitWindowCaptionButton(
+        VIEW_ID_RESTORE_BUTTON, gfx::Size(25, 18));
+    close_button_ = InitWindowCaptionButton(
+        VIEW_ID_CLOSE_BUTTON, gfx::Size(43, 18));
+  }
+
+  virtual void TearDown() OVERRIDE {
+    widget_->CloseNow();
+
+    views::ViewsTestBase::TearDown();
+  }
+
+ protected:
+  views::ImageButton* InitWindowCaptionButton(ViewID view_id,
+                                              const gfx::Size& size) {
+    views::ImageButton* button = new views::ImageButton(NULL);
+    gfx::ImageSkiaRep rep(size, ui::SCALE_FACTOR_100P);
+    gfx::ImageSkia image(rep);
+    button->SetImage(views::CustomButton::STATE_NORMAL, &image);
+    button->set_id(view_id);
+    root_view_->AddChildView(button);
+    return button;
+  }
+
+  void AddWindowTitleIcons() {
+    tab_icon_view_ = new TabIconView(NULL);
+    tab_icon_view_->set_is_light(true);
+    tab_icon_view_->set_id(VIEW_ID_WINDOW_ICON);
+    root_view_->AddChildView(tab_icon_view_);
+
+    window_title_ = new views::Label(delegate_->GetWindowTitle(),
+                                     default_font_);
+    window_title_->SetVisible(delegate_->ShouldShowWindowTitle());
+    window_title_->SetEnabledColor(SK_ColorWHITE);
+    window_title_->SetBackgroundColor(0x00000000);
+    window_title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+    window_title_->set_id(VIEW_ID_WINDOW_TITLE);
+    root_view_->AddChildView(window_title_);
+  }
+
+  void AddAvatarButton() {
+    menu_button_ = new views::MenuButton(NULL, string16(), NULL, false);
+    menu_button_->set_id(VIEW_ID_AVATAR_BUTTON);
+    delegate_->SetShouldShowAvatar(true);
+    root_view_->AddChildView(menu_button_);
+  }
+
+  void ExpectBasicWindowBounds() {
+    EXPECT_EQ("428,1 25x18", maximize_button_->bounds().ToString());
+    EXPECT_EQ("402,1 26x18", minimize_button_->bounds().ToString());
+    EXPECT_EQ("0,0 0x0", restore_button_->bounds().ToString());
+    EXPECT_EQ("453,1 43x18", close_button_->bounds().ToString());
+  }
+
+  gfx::Font default_font_;
+
+  Widget* widget_;
+  views::View* root_view_;
+  OpaqueBrowserFrameViewLayout* layout_manager_;
+  TestLayoutDelegate* delegate_;
+
+  // Widgets:
+  views::ImageButton* minimize_button_;
+  views::ImageButton* maximize_button_;
+  views::ImageButton* restore_button_;
+  views::ImageButton* close_button_;
+
+  TabIconView* tab_icon_view_;
+  views::Label* window_title_;
+
+  views::MenuButton* menu_button_;
+
+  DISALLOW_COPY_AND_ASSIGN(OpaqueBrowserFrameViewLayoutTest);
+};
+
+TEST_F(OpaqueBrowserFrameViewLayoutTest, BasicWindow) {
+  // Tests the layout of a default chrome window with no avatars, no window
+  // titles, and a tabstrip.
+  root_view_->Layout();
+
+  ExpectBasicWindowBounds();
+
+  // After some visual inspection, it really does look like the tabstrip is
+  // initally positioned out of our view.
+  EXPECT_EQ("-1,13 398x29",
+            layout_manager_->GetBoundsForTabStrip(
+                delegate_->GetTabstripPreferredSize(), kWidth).ToString());
+  EXPECT_EQ("226x73", layout_manager_->GetMinimumSize(kWidth).ToString());
+
+  // A normal window with no window icon still produces icon bounds for
+  // Windows, which has a hidden icon that a user can double click on to close
+  // the window.
+  EXPECT_EQ("6,4 17x17", layout_manager_->IconBounds().ToString());
+}
+
+TEST_F(OpaqueBrowserFrameViewLayoutTest, BasicWindowMaximized) {
+  // Tests the layout of a default chrome window with no avatars, no window
+  // titles, and a tabstrip, but maximized this time.
+  delegate_->SetWindowState(TestLayoutDelegate::STATE_MAXIMIZED);
+  root_view_->Layout();
+
+  // Note how the bonds start at the exact top of the window while maximized
+  // while they start 1 pixel below when unmaximized.
+  EXPECT_EQ("0,0 0x0", maximize_button_->bounds().ToString());
+  EXPECT_EQ("403,0 26x18", minimize_button_->bounds().ToString());
+  EXPECT_EQ("429,0 25x18", restore_button_->bounds().ToString());
+  EXPECT_EQ("454,0 46x18", close_button_->bounds().ToString());
+
+  EXPECT_EQ("-6,-3 393x29",
+            layout_manager_->GetBoundsForTabStrip(
+                delegate_->GetTabstripPreferredSize(), kWidth).ToString());
+  EXPECT_EQ("231x61", layout_manager_->GetMinimumSize(kWidth).ToString());
+
+  // In the maximized case, OpaqueBrowserFrameView::NonClientHitTest() uses
+  // this rect, extended to the top left corner of the window.
+  EXPECT_EQ("2,0 17x17", layout_manager_->IconBounds().ToString());
+}
+
+TEST_F(OpaqueBrowserFrameViewLayoutTest, WithWindowTitleAndIcon) {
+  // Tests the layout of pop up windows.
+  delegate_->SetWindowTitle(ASCIIToUTF16("Window Title"));
+  AddWindowTitleIcons();
+  root_view_->Layout();
+
+  // We should have the right hand side should match the BasicWindow case.
+  ExpectBasicWindowBounds();
+
+  // Check the location of the tab icon and window title.
+  EXPECT_EQ("6,3 17x17", tab_icon_view_->bounds().ToString());
+  EXPECT_EQ("27,3 370x17", window_title_->bounds().ToString());
+}
+
+TEST_F(OpaqueBrowserFrameViewLayoutTest, WindowWithAvatar) {
+  // Tests a normal tabstrip window with an avatar icon.
+  AddAvatarButton();
+  root_view_->Layout();
+
+  ExpectBasicWindowBounds();
+
+  // Check the location of the avatar
+  EXPECT_EQ("7,11 40x29", menu_button_->bounds().ToString());
+  EXPECT_EQ("45,13 352x29",
+            layout_manager_->GetBoundsForTabStrip(
+                delegate_->GetTabstripPreferredSize(), kWidth).ToString());
+  EXPECT_EQ("226x73", layout_manager_->GetMinimumSize(kWidth).ToString());
+}