mandoline: Add back/forward support and UI.

mandoline/ui/desktop_ui/browser_window.cc

 // Copyright 2015 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 "mandoline/ui/desktop_ui/browser_window.h"
 
 #include "base/command_line.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "components/view_manager/public/cpp/scoped_view_ptr.h"
 #include "components/view_manager/public/cpp/view_tree_host_factory.h"
 #include "mandoline/ui/aura/native_widget_view_manager.h"
 #include "mandoline/ui/desktop_ui/browser_commands.h"
 #include "mandoline/ui/desktop_ui/browser_manager.h"
 #include "mandoline/ui/desktop_ui/public/interfaces/omnibox.mojom.h"
 #include "mojo/common/common_type_converters.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/services/tracing/public/cpp/switches.h"
 #include "mojo/services/tracing/public/interfaces/tracing.mojom.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/button/label_button.h"
+#include "ui/views/layout/box_layout.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace mandoline {
 
+using views::BoxLayout;

[msw, 2015/09/04 23:49:00]

nit: remove, inline one more "views::".

+
+class BrowserWindow::ToolbarView : public views::View,
+                                   public views::ButtonListener {
+ public:
+  ToolbarView(BrowserWindow* browser_window)
+      : browser_window_(browser_window),
+        layout_(new views::BoxLayout(BoxLayout::kHorizontal, 0, 0, 5)),
+        back_button_(new views::LabelButton(this, base::ASCIIToUTF16("Back"))),
+        forward_button_(
+            new views::LabelButton(this, base::ASCIIToUTF16("Forward"))),
+        omnibox_launcher_(
+            new views::LabelButton(this, base::ASCIIToUTF16("Open Omnibox"))) {
+    SetLayoutManager(layout_);
+
+    AddChildView(back_button_);
+    AddChildView(forward_button_);
+    AddChildView(omnibox_launcher_);
+
+    layout_->SetDefaultFlex(0);
+    layout_->SetFlexForView(omnibox_launcher_, 1);
+  }
+
+  ~ToolbarView() override {}
+
+  void SetOmniboxText(const base::string16& text) {
+    omnibox_launcher_->SetText(text);
+  }
+
+  void SetBackForwardEnabled(bool back_enabled, bool forward_enabled) {
+    back_button_->SetEnabled(back_enabled);
+    forward_button_->SetEnabled(forward_enabled);
+  }
+
+  // Overridden from views::ButtonListener:
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override {
+    if (sender == omnibox_launcher_)
+      browser_window_->ShowOmnibox();
+    else if (sender == back_button_)
+      browser_window_->GoBack();
+    else if (sender == forward_button_)
+      browser_window_->GoForward();
+    else
+      NOTIMPLEMENTED();
+  }
+
+ private:
+  BrowserWindow* browser_window_;
+
+  views::BoxLayout* layout_;
+  views::LabelButton* back_button_;
+  views::LabelButton* forward_button_;
+  views::LabelButton* omnibox_launcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(ToolbarView);
+};
+
 class ProgressView : public views::View {
  public:
   ProgressView() : progress_(0.f), loading_(false) {}
   ~ProgressView() override {}
 
   void SetProgress(double progress) {
     progress_ = progress;
     SchedulePaint();
   }
 
@@ skipping 26 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow, public:
 
 BrowserWindow::BrowserWindow(mojo::ApplicationImpl* app,
                              mojo::ViewTreeHostFactory* host_factory,
                              BrowserManager* manager)
     : app_(app),
       host_client_binding_(this),
       manager_(manager),
-      omnibox_launcher_(nullptr),
+      toolbar_view_(nullptr),
       progress_bar_(nullptr),
       root_(nullptr),
       content_(nullptr),
       omnibox_view_(nullptr),
       web_view_(this) {
   mojo::ViewTreeHostClientPtr host_client;
   host_client_binding_.Bind(GetProxy(&host_client));
   mojo::CreateViewTreeHost(host_factory, host_client.Pass(), this, &host_);
 }
 
@@ skipping 56 matching lines @@
   content_->SetAccessPolicy(mojo::ViewTree::ACCESS_POLICY_EMBED_ROOT);
 
   web_view_.Init(app_, content_);
 
   host_->AddAccelerator(BrowserCommand_Close, mojo::KEYBOARD_CODE_W,
                         mojo::EVENT_FLAGS_CONTROL_DOWN);
   host_->AddAccelerator(BrowserCommand_FocusOmnibox, mojo::KEYBOARD_CODE_L,
                         mojo::EVENT_FLAGS_CONTROL_DOWN);
   host_->AddAccelerator(BrowserCommand_NewWindow, mojo::KEYBOARD_CODE_N,
                         mojo::EVENT_FLAGS_CONTROL_DOWN);
+  host_->AddAccelerator(BrowserCommand_GoBack, mojo::KEYBOARD_CODE_LEFT,
+                        mojo::EVENT_FLAGS_ALT_DOWN);
+  host_->AddAccelerator(BrowserCommand_GoForward, mojo::KEYBOARD_CODE_RIGHT,
+                        mojo::EVENT_FLAGS_ALT_DOWN);
 
   // Now that we're ready, load the default url.
   LoadURL(default_url_);
 
   // Record the time spent opening initial tabs, used for performance testing.
   const base::TimeDelta open_tabs_delta = base::Time::Now() - display_time;
 
   // Record the browser startup time metrics, used for performance testing.
   static bool recorded_browser_startup_metrics = false;
   if (!recorded_browser_startup_metrics &&
@@ skipping 23 matching lines @@
   switch (id) {
     case BrowserCommand_Close:
       Close();
       break;
     case BrowserCommand_NewWindow:
       manager_->CreateBrowser(GURL());
       break;
     case BrowserCommand_FocusOmnibox:
       ShowOmnibox();
       break;
+    case BrowserCommand_GoBack:
+      GoBack();
+      break;
+    case BrowserCommand_GoForward:
+      GoForward();
+      break;
     default:
       NOTREACHED();
       break;
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow, web_view::mojom::WebViewClient implementation:
 
 void BrowserWindow::TopLevelNavigate(mojo::URLRequestPtr request) {
   Embed(request.Pass());
 }
 
 void BrowserWindow::LoadingStateChanged(bool is_loading) {
   progress_bar_->SetIsLoading(is_loading);
 }
 
 void BrowserWindow::ProgressChanged(double progress) {
   progress_bar_->SetProgress(progress);
 }
 
+void BrowserWindow::BackForwardChanged(bool back_enabled,
+                                       bool forward_enabled) {
+  toolbar_view_->SetBackForwardEnabled(back_enabled, forward_enabled);
+}
+
 void BrowserWindow::TitleChanged(const mojo::String& title) {
   base::string16 formatted =
       title.is_null() ? base::ASCIIToUTF16("Untitled")
                       : title.To<base::string16>() +
           base::ASCIIToUTF16(" - Mandoline");
   host_->SetTitle(mojo::String::From(formatted));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow, ViewEmbedder implementation:
 
 void BrowserWindow::Embed(mojo::URLRequestPtr request) {
   const std::string string_url = request->url.To<std::string>();
   if (string_url == "mojo:omnibox") {
     EmbedOmnibox();
     return;
   }
 
   GURL gurl(string_url);
   bool changed = current_url_ != gurl;
   current_url_ = gurl;
   if (changed)
-    omnibox_launcher_->SetText(base::UTF8ToUTF16(current_url_.spec()));
+    toolbar_view_->SetOmniboxText(base::UTF8ToUTF16(current_url_.spec()));
 
   web_view_.web_view()->LoadRequest(request.Pass());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow, mojo::InterfaceFactory<ViewEmbedder> implementation:
 
 void BrowserWindow::Create(mojo::ApplicationConnection* connection,
                            mojo::InterfaceRequest<ViewEmbedder> request) {
   view_embedder_bindings_.AddBinding(this, request.Pass());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow, views::LayoutManager implementation:
 
 gfx::Size BrowserWindow::GetPreferredSize(const views::View* view) const {
   return gfx::Size();
 }
 
 void BrowserWindow::Layout(views::View* host) {
   // TODO(fsamuel): All bounds should be in physical pixels.
   gfx::Rect bounds_in_physical_pixels(host->bounds());
   float inverse_device_pixel_ratio =
       1.0f / root_->viewport_metrics().device_pixel_ratio;
 
-  gfx::Rect omnibox_launcher_bounds =
-      gfx::ToEnclosingRect(gfx::ScaleRect(bounds_in_physical_pixels,
-                                          inverse_device_pixel_ratio));
-  omnibox_launcher_bounds.Inset(10, 10, 10,
-                                omnibox_launcher_bounds.height() - 40);
-  omnibox_launcher_->SetBoundsRect(omnibox_launcher_bounds);
+  gfx::Rect toolbar_bounds = gfx::ToEnclosingRect(
+      gfx::ScaleRect(bounds_in_physical_pixels, inverse_device_pixel_ratio));
+  toolbar_bounds.Inset(10, 10, 10, toolbar_bounds.height() - 40);
+  toolbar_view_->SetBoundsRect(toolbar_bounds);
 
-  gfx::Rect progress_bar_bounds(omnibox_launcher_bounds.x(),
-                                omnibox_launcher_bounds.bottom() + 2,
-                                omnibox_launcher_bounds.width(),
-                                5);
+  gfx::Rect progress_bar_bounds(toolbar_bounds.x(), toolbar_bounds.bottom() + 2,
+                                toolbar_bounds.width(), 5);
   progress_bar_->SetBoundsRect(progress_bar_bounds);
 
   // The content view bounds are in physical pixels.
   mojo::Rect content_bounds_mojo;
   content_bounds_mojo.x = DIPSToPixels(progress_bar_bounds.x());
   content_bounds_mojo.y = DIPSToPixels(progress_bar_bounds.bottom()+ 10);
   content_bounds_mojo.width = DIPSToPixels(progress_bar_bounds.width());
   content_bounds_mojo.height =
       host->bounds().height() - content_bounds_mojo.y - DIPSToPixels(10);
   content_->SetBounds(content_bounds_mojo);
 
   // The omnibox view bounds are in physical pixels.
   omnibox_view_->SetBounds(
       mojo::TypeConverter<mojo::Rect, gfx::Rect>::Convert(
           bounds_in_physical_pixels));
-
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// BrowserWindow, views::ButtonListener implementation:
-
-void BrowserWindow::ButtonPressed(views::Button* sender,
-                                  const ui::Event& event) {
-  DCHECK_EQ(sender, omnibox_launcher_);
-  ShowOmnibox();
-}
-
-////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow, private:
 
 void BrowserWindow::Init(mojo::View* root) {
   DCHECK_GT(root->viewport_metrics().device_pixel_ratio, 0);
   if (!aura_init_)
     aura_init_.reset(new AuraInit(root, app_->shell()));
 
   root_ = root;
   omnibox_view_ = root_->connection()->CreateView();
   root_->AddChild(omnibox_view_);
 
   views::WidgetDelegateView* widget_delegate = new views::WidgetDelegateView;
   widget_delegate->GetContentsView()->set_background(
     views::Background::CreateSolidBackground(0xFFDDDDDD));
-  omnibox_launcher_ =
-      new views::LabelButton(this, base::ASCIIToUTF16("Open Omnibox"));
+  toolbar_view_ = new ToolbarView(this);
   progress_bar_ = new ProgressView;
-
-  widget_delegate->GetContentsView()->AddChildView(omnibox_launcher_);
+  widget_delegate->GetContentsView()->AddChildView(toolbar_view_);
   widget_delegate->GetContentsView()->AddChildView(progress_bar_);
   widget_delegate->GetContentsView()->SetLayoutManager(this);
 
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.native_widget =
       new NativeWidgetViewManager(widget, app_->shell(), root_);
   params.delegate = widget_delegate;
   params.bounds = root_->bounds().To<gfx::Rect>();
@@ skipping 12 matching lines @@
     omnibox_connection_->SetRemoteServiceProviderConnectionErrorHandler(
       [this]() {
         // This will cause the connection to be re-established the next time
         // we come through this codepath.
         omnibox_.reset();
     });
   }
   omnibox_->ShowForURL(mojo::String::From(current_url_.spec()));
 }
 
+void BrowserWindow::GoBack() {
+  web_view_.web_view()->GoBack();
+}
+
+void BrowserWindow::GoForward() {
+  web_view_.web_view()->GoForward();
+}
+
 void BrowserWindow::EmbedOmnibox() {
   mojo::ViewTreeClientPtr view_tree_client;
   omnibox_->GetViewTreeClient(GetProxy(&view_tree_client));
   omnibox_view_->Embed(view_tree_client.Pass());
 
   // TODO(beng): This should be handled sufficiently by
   //             OmniboxImpl::ShowWindow() but unfortunately view manager policy
   //             currently prevents the embedded app from changing window z for
   //             its own window.
   omnibox_view_->MoveToFront();
 }
 
 }  // namespace mandoline