chrome/browser/ui/views/frame/opaque_browser_frame

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This source file includes following definitions.
frame_background_
GetBoundsForTabStrip
GetTopInset
GetThemeBackgroundXInset
UpdateThrobber
GetMinimumSize
GetBoundsForClientView
GetWindowBoundsForClientBounds
NonClientHitTest
GetWindowMask
ResetWindowControls
UpdateWindowIcon
UpdateWindowTitle
HitTestRect
GetAccessibleState
ButtonPressed
OnMenuButtonClicked
ShouldTabIconViewAnimate
GetFaviconForTabIconView
Observe
ShouldShowWindowIcon
ShouldShowWindowTitle
GetWindowTitle
GetIconSize
ShouldLeaveOffsetNearTopBorder
GetBrowserViewMinimumSize
ShouldShowCaptionButtons
ShouldShowAvatar
IsRegularOrGuestSession
GetOTRAvatarIcon
IsMaximized
IsMinimized
IsFullscreen
IsTabStripVisible
GetTabStripHeight
GetAdditionalReservedSpaceInTabStrip
GetTabstripPreferredSize
OnPaint
InitWindowCaptionButton
FrameBorderThickness
TopResizeHeight
NonClientBorderThickness
IconBounds
ShouldShowWindowTitleBar
PaintRestoredFrameBorder
PaintMaximizedFrameBorder
PaintToolbarBackground
PaintRestoredClientEdge
GetFrameColor
GetFrameImage
GetFrameOverlayImage
GetTopAreaHeight
// 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 "chrome/browser/ui/views/frame/opaque_browser_frame_view.h"

#include <algorithm>
#include <string>

#include "base/compiler_specific.h"
#include "base/prefs/pref_service.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/profiles/profiles_state.h"
#include "chrome/browser/themes/theme_properties.h"
#include "chrome/browser/ui/views/avatar_label.h"
#include "chrome/browser/ui/views/avatar_menu_button.h"
#include "chrome/browser/ui/views/frame/browser_frame.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/browser/ui/views/frame/opaque_browser_frame_view_layout.h"
#include "chrome/browser/ui/views/frame/opaque_browser_frame_view_platform_specific.h"
#include "chrome/browser/ui/views/new_avatar_button.h"
#include "chrome/browser/ui/views/tab_icon_view.h"
#include "chrome/browser/ui/views/tabs/tab_strip.h"
#include "chrome/browser/ui/views/theme_image_mapper.h"
#include "chrome/browser/ui/views/toolbar/toolbar_view.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/profile_management_switches.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/web_contents.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "grit/ui_resources.h"
#include "ui/accessibility/ax_view_state.h"
#include "ui/base/hit_test.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/theme_provider.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/path.h"
#include "ui/gfx/rect_conversions.h"
#include "ui/views/controls/button/image_button.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/label.h"
#include "ui/views/layout/layout_constants.h"
#include "ui/views/views_delegate.h"
#include "ui/views/widget/root_view.h"
#include "ui/views/window/frame_background.h"
#include "ui/views/window/window_shape.h"

#if defined(OS_LINUX)
#include "ui/views/controls/menu/menu_runner.h"
#endif

using content::WebContents;

namespace {

// While resize areas on Windows are normally the same size as the window
// borders, our top area is shrunk by 1 px to make it easier to move the window
// around with our thinner top grabbable strip.  (Incidentally, our side and
// bottom resize areas don't match the frame border thickness either -- they
// span the whole nonclient area, so there's no "dead zone" for the mouse.)
const int kTopResizeAdjust = 1;

// In the window corners, the resize areas don't actually expand bigger, but the
// 16 px at the end of each edge triggers diagonal resizing.
const int kResizeAreaCornerSize = 16;

// The content left/right images have a shadow built into them.
const int kContentEdgeShadowThickness = 2;

// The icon never shrinks below 16 px on a side.
const int kIconMinimumSize = 16;

#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
// The number of pixels to move the frame background image upwards when using
// the GTK+ theme and the titlebar is condensed.
const int kGTKThemeCondensedFrameTopInset = 15;
#endif

}  // namespace

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, public:

OpaqueBrowserFrameView::OpaqueBrowserFrameView(BrowserFrame* frame,
                                               BrowserView* browser_view)
    : BrowserNonClientFrameView(frame, browser_view),
      layout_(new OpaqueBrowserFrameViewLayout(this)),
      minimize_button_(NULL),
      maximize_button_(NULL),
      restore_button_(NULL),
      close_button_(NULL),
      window_icon_(NULL),
      window_title_(NULL),
      frame_background_(new views::FrameBackground()) {
  SetLayoutManager(layout_);

  if (OpaqueBrowserFrameViewLayout::ShouldAddDefaultCaptionButtons()) {
    minimize_button_ = InitWindowCaptionButton(IDR_MINIMIZE,
                                               IDR_MINIMIZE_H,
                                               IDR_MINIMIZE_P,
                                               IDR_MINIMIZE_BUTTON_MASK,
                                               IDS_ACCNAME_MINIMIZE,
                                               VIEW_ID_MINIMIZE_BUTTON);
    maximize_button_ = InitWindowCaptionButton(IDR_MAXIMIZE,
                                               IDR_MAXIMIZE_H,
                                               IDR_MAXIMIZE_P,
                                               IDR_MAXIMIZE_BUTTON_MASK,
                                               IDS_ACCNAME_MAXIMIZE,
                                               VIEW_ID_MAXIMIZE_BUTTON);
    restore_button_ = InitWindowCaptionButton(IDR_RESTORE,
                                              IDR_RESTORE_H,
                                              IDR_RESTORE_P,
                                              IDR_RESTORE_BUTTON_MASK,
                                              IDS_ACCNAME_RESTORE,
                                              VIEW_ID_RESTORE_BUTTON);
    close_button_ = InitWindowCaptionButton(IDR_CLOSE,
                                            IDR_CLOSE_H,
                                            IDR_CLOSE_P,
                                            IDR_CLOSE_BUTTON_MASK,
                                            IDS_ACCNAME_CLOSE,
                                            VIEW_ID_CLOSE_BUTTON);
  }

  // Initializing the TabIconView is expensive, so only do it if we need to.
  if (browser_view->ShouldShowWindowIcon()) {
    window_icon_ = new TabIconView(this, this);
    window_icon_->set_is_light(true);
    window_icon_->set_id(VIEW_ID_WINDOW_ICON);
    AddChildView(window_icon_);
    window_icon_->Update();
  }

  window_title_ = new views::Label(
      browser_view->GetWindowTitle(),
      gfx::FontList(BrowserFrame::GetTitleFontList()));
  window_title_->SetVisible(browser_view->ShouldShowWindowTitle());
  window_title_->SetEnabledColor(SK_ColorWHITE);
  // TODO(msw): Use a transparent background color as a workaround to use the
  // gfx::Canvas::NO_SUBPIXEL_RENDERING flag and avoid some visual artifacts.
  window_title_->SetBackgroundColor(0x00000000);
  window_title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  window_title_->set_id(VIEW_ID_WINDOW_TITLE);
  AddChildView(window_title_);

  if (browser_view->IsRegularOrGuestSession() &&
      switches::IsNewProfileManagement())
    UpdateNewStyleAvatarInfo(this, NewAvatarButton::THEMED_BUTTON);
  else
    UpdateAvatarInfo();

  if (!browser_view->IsOffTheRecord()) {
    registrar_.Add(this, chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED,
                   content::NotificationService::AllSources());
  }

  platform_observer_.reset(OpaqueBrowserFrameViewPlatformSpecific::Create(
      this, layout_, browser_view->browser()->profile()));
}

OpaqueBrowserFrameView::~OpaqueBrowserFrameView() {
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, BrowserNonClientFrameView implementation:

gfx::Rect OpaqueBrowserFrameView::GetBoundsForTabStrip(
    views::View* tabstrip) const {
  if (!tabstrip)
    return gfx::Rect();

  return layout_->GetBoundsForTabStrip(tabstrip->GetPreferredSize(), width());
}

int OpaqueBrowserFrameView::GetTopInset() const {
  return browser_view()->IsTabStripVisible() ?
      layout_->GetTabStripInsetsTop(false) :
      layout_->NonClientTopBorderHeight(false);
}

int OpaqueBrowserFrameView::GetThemeBackgroundXInset() const {
  return 0;
}

void OpaqueBrowserFrameView::UpdateThrobber(bool running) {
  if (window_icon_)
    window_icon_->Update();
}

gfx::Size OpaqueBrowserFrameView::GetMinimumSize() {
  return layout_->GetMinimumSize(width());
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, views::NonClientFrameView implementation:

gfx::Rect OpaqueBrowserFrameView::GetBoundsForClientView() const {
  return layout_->client_view_bounds();
}

gfx::Rect OpaqueBrowserFrameView::GetWindowBoundsForClientBounds(
    const gfx::Rect& client_bounds) const {
  return layout_->GetWindowBoundsForClientBounds(client_bounds);
}

int OpaqueBrowserFrameView::NonClientHitTest(const gfx::Point& point) {
  if (!bounds().Contains(point))
    return HTNOWHERE;

  // See if the point is within the avatar menu button or within the avatar
  // label.
  if ((avatar_button() &&
       avatar_button()->GetMirroredBounds().Contains(point)) ||
      (avatar_label() && avatar_label()->GetMirroredBounds().Contains(point)) ||
      (new_avatar_button() &&
       new_avatar_button()->GetMirroredBounds().Contains(point)))
    return HTCLIENT;

  int frame_component = frame()->client_view()->NonClientHitTest(point);

  // See if we're in the sysmenu region.  We still have to check the tabstrip
  // first so that clicks in a tab don't get treated as sysmenu clicks.
  gfx::Rect sysmenu_rect(IconBounds());
  // In maximized mode we extend the rect to the screen corner to take advantage
  // of Fitts' Law.
  if (layout_->IsTitleBarCondensed())
    sysmenu_rect.SetRect(0, 0, sysmenu_rect.right(), sysmenu_rect.bottom());
  sysmenu_rect.set_x(GetMirroredXForRect(sysmenu_rect));
  if (sysmenu_rect.Contains(point))
    return (frame_component == HTCLIENT) ? HTCLIENT : HTSYSMENU;

  if (frame_component != HTNOWHERE)
    return frame_component;

  // Then see if the point is within any of the window controls.
  if (close_button_ && close_button_->visible() &&
      close_button_->GetMirroredBounds().Contains(point))
    return HTCLOSE;
  if (restore_button_ && restore_button_->visible() &&
      restore_button_->GetMirroredBounds().Contains(point))
    return HTMAXBUTTON;
  if (maximize_button_ && maximize_button_->visible() &&
      maximize_button_->GetMirroredBounds().Contains(point))
    return HTMAXBUTTON;
  if (minimize_button_ && minimize_button_->visible() &&
      minimize_button_->GetMirroredBounds().Contains(point))
    return HTMINBUTTON;

  views::WidgetDelegate* delegate = frame()->widget_delegate();
  if (!delegate) {
    LOG(WARNING) << "delegate is NULL, returning safe default.";
    return HTCAPTION;
  }
  int window_component = GetHTComponentForFrame(point, TopResizeHeight(),
      NonClientBorderThickness(), kResizeAreaCornerSize, kResizeAreaCornerSize,
      delegate->CanResize());
  // Fall back to the caption if no other component matches.
  return (window_component == HTNOWHERE) ? HTCAPTION : window_component;
}

void OpaqueBrowserFrameView::GetWindowMask(const gfx::Size& size,
                                           gfx::Path* window_mask) {
  DCHECK(window_mask);

  if (layout_->IsTitleBarCondensed() || frame()->IsFullscreen())
    return;

  views::GetDefaultWindowMask(size, window_mask);
}

void OpaqueBrowserFrameView::ResetWindowControls() {
  if (!OpaqueBrowserFrameViewLayout::ShouldAddDefaultCaptionButtons())
    return;
  restore_button_->SetState(views::CustomButton::STATE_NORMAL);
  minimize_button_->SetState(views::CustomButton::STATE_NORMAL);
  maximize_button_->SetState(views::CustomButton::STATE_NORMAL);
  // The close button isn't affected by this constraint.
}

void OpaqueBrowserFrameView::UpdateWindowIcon() {
  window_icon_->SchedulePaint();
}

void OpaqueBrowserFrameView::UpdateWindowTitle() {
  if (!frame()->IsFullscreen())
    window_title_->SchedulePaint();
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, views::View overrides:

bool OpaqueBrowserFrameView::HitTestRect(const gfx::Rect& rect) const {
  if (!views::View::HitTestRect(rect)) {
    // |rect| is outside OpaqueBrowserFrameView's bounds.
    return false;
  }

  // If the rect is outside the bounds of the client area, claim it.
  gfx::RectF rect_in_client_view_coords_f(rect);
  View::ConvertRectToTarget(this, frame()->client_view(),
      &rect_in_client_view_coords_f);
  gfx::Rect rect_in_client_view_coords = gfx::ToEnclosingRect(
      rect_in_client_view_coords_f);
  if (!frame()->client_view()->HitTestRect(rect_in_client_view_coords))
    return true;

  // Otherwise, claim |rect| only if it is above the bottom of the tabstrip in
  // a non-tab portion.
  TabStrip* tabstrip = browser_view()->tabstrip();
  if (!tabstrip || !browser_view()->IsTabStripVisible())
    return false;

  gfx::RectF rect_in_tabstrip_coords_f(rect);
  View::ConvertRectToTarget(this, tabstrip, &rect_in_tabstrip_coords_f);
  gfx::Rect rect_in_tabstrip_coords = gfx::ToEnclosingRect(
      rect_in_tabstrip_coords_f);
  if (rect_in_tabstrip_coords.bottom() > tabstrip->GetLocalBounds().bottom()) {
    // |rect| is below the tabstrip.
    return false;
  }

  if (tabstrip->HitTestRect(rect_in_tabstrip_coords)) {
    // Claim |rect| if it is in a non-tab portion of the tabstrip.
    return tabstrip->IsRectInWindowCaption(rect_in_tabstrip_coords);
  }

  // The window switcher button is to the right of the tabstrip but is
  // part of the client view.
  views::View* window_switcher_button =
      browser_view()->window_switcher_button();
  if (window_switcher_button && window_switcher_button->visible()) {
    gfx::RectF rect_in_window_switcher_coords_f(rect);
    View::ConvertRectToTarget(this, window_switcher_button,
        &rect_in_window_switcher_coords_f);
    gfx::Rect rect_in_window_switcher_coords = gfx::ToEnclosingRect(
        rect_in_window_switcher_coords_f);

    if (window_switcher_button->HitTestRect(rect_in_window_switcher_coords))
      return false;
  }

  // We claim |rect| because it is above the bottom of the tabstrip, but
  // neither in the tabstrip nor in the window switcher button. In particular,
  // the avatar label/button is left of the tabstrip and the window controls
  // are right of the tabstrip.
  return true;
}

void OpaqueBrowserFrameView::GetAccessibleState(
    ui::AXViewState* state) {
  state->role = ui::AX_ROLE_TITLE_BAR;
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, views::ButtonListener implementation:

void OpaqueBrowserFrameView::ButtonPressed(views::Button* sender,
                                           const ui::Event& event) {
  if (sender == minimize_button_) {
    frame()->Minimize();
  } else if (sender == maximize_button_) {
    frame()->Maximize();
  } else if (sender == restore_button_) {
    frame()->Restore();
  } else if (sender == close_button_) {
    frame()->Close();
  } else if (sender == new_avatar_button()) {
    browser_view()->ShowAvatarBubbleFromAvatarButton(
        BrowserWindow::AVATAR_BUBBLE_MODE_DEFAULT);
  }
}

void OpaqueBrowserFrameView::OnMenuButtonClicked(views::View* source,
                                                 const gfx::Point& point) {
#if defined(OS_LINUX)
  views::MenuRunner menu_runner(frame()->GetSystemMenuModel());
  ignore_result(menu_runner.RunMenuAt(browser_view()->GetWidget(),
                                      window_icon_,
                                      window_icon_->GetBoundsInScreen(),
                                      views::MenuItemView::TOPLEFT,
                                      ui::MENU_SOURCE_MOUSE,
                                      views::MenuRunner::HAS_MNEMONICS));
#endif
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, TabIconView::TabContentsProvider implementation:

bool OpaqueBrowserFrameView::ShouldTabIconViewAnimate() const {
  // This function is queried during the creation of the window as the
  // TabIconView we host is initialized, so we need to NULL check the selected
  // WebContents because in this condition there is not yet a selected tab.
  WebContents* current_tab = browser_view()->GetActiveWebContents();
  return current_tab ? current_tab->IsLoading() : false;
}

gfx::ImageSkia OpaqueBrowserFrameView::GetFaviconForTabIconView() {
  views::WidgetDelegate* delegate = frame()->widget_delegate();
  if (!delegate) {
    LOG(WARNING) << "delegate is NULL, returning safe default.";
    return gfx::ImageSkia();
  }
  return delegate->GetWindowIcon();
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, protected:

void OpaqueBrowserFrameView::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  switch (type) {
    case chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED:
      if (browser_view() ->IsRegularOrGuestSession() &&
          switches::IsNewProfileManagement())
        UpdateNewStyleAvatarInfo(this, NewAvatarButton::THEMED_BUTTON);
      else
        UpdateAvatarInfo();
      break;
    default:
      NOTREACHED() << "Got a notification we didn't register for!";
      break;
  }
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, OpaqueBrowserFrameViewLayoutDelegate implementation:

bool OpaqueBrowserFrameView::ShouldShowWindowIcon() const {
  views::WidgetDelegate* delegate = frame()->widget_delegate();
  return ShouldShowWindowTitleBar() && delegate &&
         delegate->ShouldShowWindowIcon();
}

bool OpaqueBrowserFrameView::ShouldShowWindowTitle() const {
  // |delegate| may be NULL if called from callback of InputMethodChanged while
  // a window is being destroyed.
  // See more discussion at http://crosbug.com/8958
  views::WidgetDelegate* delegate = frame()->widget_delegate();
  return ShouldShowWindowTitleBar() && delegate &&
         delegate->ShouldShowWindowTitle();
}

base::string16 OpaqueBrowserFrameView::GetWindowTitle() const {
  return frame()->widget_delegate()->GetWindowTitle();
}

int OpaqueBrowserFrameView::GetIconSize() const {
#if defined(OS_WIN)
  // This metric scales up if either the titlebar height or the titlebar font
  // size are increased.
  return GetSystemMetrics(SM_CYSMICON);
#else
  return std::max(BrowserFrame::GetTitleFontList().GetHeight(),
                  kIconMinimumSize);
#endif
}

bool OpaqueBrowserFrameView::ShouldLeaveOffsetNearTopBorder() const {
  return frame()->ShouldLeaveOffsetNearTopBorder();
}

gfx::Size OpaqueBrowserFrameView::GetBrowserViewMinimumSize() const {
  return browser_view()->GetMinimumSize();
}

bool OpaqueBrowserFrameView::ShouldShowCaptionButtons() const {
  if (!OpaqueBrowserFrameViewLayout::ShouldAddDefaultCaptionButtons())
    return false;
  return ShouldShowWindowTitleBar();
}

bool OpaqueBrowserFrameView::ShouldShowAvatar() const {
  return browser_view()->ShouldShowAvatar();
}

bool OpaqueBrowserFrameView::IsRegularOrGuestSession() const {
  return browser_view()->IsRegularOrGuestSession();
}

gfx::ImageSkia OpaqueBrowserFrameView::GetOTRAvatarIcon() const {
  return browser_view()->GetOTRAvatarIcon();
}

bool OpaqueBrowserFrameView::IsMaximized() const {
  return frame()->IsMaximized();
}

bool OpaqueBrowserFrameView::IsMinimized() const {
  return frame()->IsMinimized();
}

bool OpaqueBrowserFrameView::IsFullscreen() const {
  return frame()->IsFullscreen();
}

bool OpaqueBrowserFrameView::IsTabStripVisible() const {
  return browser_view()->IsTabStripVisible();
}

int OpaqueBrowserFrameView::GetTabStripHeight() const {
  return browser_view()->GetTabStripHeight();
}

int OpaqueBrowserFrameView::GetAdditionalReservedSpaceInTabStrip() const {
  // We don't have the sysmenu buttons in Windows 8 metro mode. However there
  // are buttons like the window switcher which are drawn in the non client
  // are in the BrowserView. We need to ensure that the tab strip does not
  // draw on the window switcher button.
  views::View* button = browser_view()->window_switcher_button();
  return button ? button->width() : 0;
}

gfx::Size OpaqueBrowserFrameView::GetTabstripPreferredSize() const {
  gfx::Size s = browser_view()->tabstrip()->GetPreferredSize();
  return s;
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, views::View overrides:

void OpaqueBrowserFrameView::OnPaint(gfx::Canvas* canvas) {
  if (frame()->IsFullscreen())
    return;  // Nothing is visible, so don't bother to paint.

  if (layout_->IsTitleBarCondensed())
    PaintMaximizedFrameBorder(canvas);
  else
    PaintRestoredFrameBorder(canvas);

  // The window icon and title are painted by their respective views.
  /* TODO(pkasting):  If this window is active, we should also draw a drop
   * shadow on the title.  This is tricky, because we don't want to hardcode a
   * shadow color (since we want to work with various themes), but we can't
   * alpha-blend either (since the Windows text APIs don't really do this).
   * So we'd need to sample the background color at the right location and
   * synthesize a good shadow color. */

  if (browser_view()->IsToolbarVisible())
    PaintToolbarBackground(canvas);
  if (!layout_->IsTitleBarCondensed())
    PaintRestoredClientEdge(canvas);
}

///////////////////////////////////////////////////////////////////////////////
// OpaqueBrowserFrameView, private:

views::ImageButton* OpaqueBrowserFrameView::InitWindowCaptionButton(
    int normal_image_id,
    int hot_image_id,
    int pushed_image_id,
    int mask_image_id,
    int accessibility_string_id,
    ViewID view_id) {
  views::ImageButton* button = new views::ImageButton(this);
  ui::ThemeProvider* tp = frame()->GetThemeProvider();
  button->SetImage(views::CustomButton::STATE_NORMAL,
                   tp->GetImageSkiaNamed(normal_image_id));
  button->SetImage(views::CustomButton::STATE_HOVERED,
                   tp->GetImageSkiaNamed(hot_image_id));
  button->SetImage(views::CustomButton::STATE_PRESSED,
                   tp->GetImageSkiaNamed(pushed_image_id));
  if (browser_view()->IsBrowserTypeNormal()) {
    button->SetBackground(
        tp->GetColor(ThemeProperties::COLOR_BUTTON_BACKGROUND),
        tp->GetImageSkiaNamed(IDR_THEME_WINDOW_CONTROL_BACKGROUND),
        tp->GetImageSkiaNamed(mask_image_id));
  }
  button->SetAccessibleName(
      l10n_util::GetStringUTF16(accessibility_string_id));
  button->set_id(view_id);
  AddChildView(button);
  return button;
}

int OpaqueBrowserFrameView::FrameBorderThickness(bool restored) const {
  return layout_->FrameBorderThickness(restored);
}

int OpaqueBrowserFrameView::TopResizeHeight() const {
  return FrameBorderThickness(false) - kTopResizeAdjust;
}

int OpaqueBrowserFrameView::NonClientBorderThickness() const {
  return layout_->NonClientBorderThickness();
}

gfx::Rect OpaqueBrowserFrameView::IconBounds() const {
  return layout_->IconBounds();
}

bool OpaqueBrowserFrameView::ShouldShowWindowTitleBar() const {
#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
  // Do not show the custom title bar if the system title bar option is enabled.
  if (!frame()->UseCustomFrame())
    return false;
#endif

  // Do not show caption buttons if the window manager is forcefully providing a
  // title bar (e.g., in Ubuntu Unity, if the window is maximized).
  if (!views::ViewsDelegate::views_delegate)
    return true;
  return !views::ViewsDelegate::views_delegate->WindowManagerProvidesTitleBar(
              IsMaximized());
}

void OpaqueBrowserFrameView::PaintRestoredFrameBorder(gfx::Canvas* canvas) {
  frame_background_->set_frame_color(GetFrameColor());
  frame_background_->set_theme_image(GetFrameImage());
  frame_background_->set_theme_overlay_image(GetFrameOverlayImage());
  frame_background_->set_top_area_height(GetTopAreaHeight());

  ui::ThemeProvider* tp = GetThemeProvider();
  frame_background_->SetSideImages(
      tp->GetImageSkiaNamed(IDR_WINDOW_LEFT_SIDE),
      tp->GetImageSkiaNamed(IDR_WINDOW_TOP_CENTER),
      tp->GetImageSkiaNamed(IDR_WINDOW_RIGHT_SIDE),
      tp->GetImageSkiaNamed(IDR_WINDOW_BOTTOM_CENTER));
  frame_background_->SetCornerImages(
      tp->GetImageSkiaNamed(IDR_WINDOW_TOP_LEFT_CORNER),
      tp->GetImageSkiaNamed(IDR_WINDOW_TOP_RIGHT_CORNER),
      tp->GetImageSkiaNamed(IDR_WINDOW_BOTTOM_LEFT_CORNER),
      tp->GetImageSkiaNamed(IDR_WINDOW_BOTTOM_RIGHT_CORNER));
  frame_background_->PaintRestored(canvas, this);

  // Note: When we don't have a toolbar, we need to draw some kind of bottom
  // edge here.  Because the App Window graphics we use for this have an
  // attached client edge and their sizing algorithm is a little involved, we do
  // all this in PaintRestoredClientEdge().
}

void OpaqueBrowserFrameView::PaintMaximizedFrameBorder(gfx::Canvas* canvas) {
  ui::ThemeProvider* tp = GetThemeProvider();
  frame_background_->set_frame_color(GetFrameColor());
  frame_background_->set_theme_image(GetFrameImage());
  frame_background_->set_theme_overlay_image(GetFrameOverlayImage());
  frame_background_->set_top_area_height(GetTopAreaHeight());
#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
  // The window manager typically shows a gradient in the native title bar (when
  // the system title bar pref is set, or when maximized on Ubuntu). Hide the
  // gradient in the tab strip (by shifting it up vertically) to avoid a
  // double-gradient effect.
  if (tp->UsingNativeTheme())
    frame_background_->set_maximized_top_inset(kGTKThemeCondensedFrameTopInset);
#endif

  frame_background_->PaintMaximized(canvas, this);

  // TODO(jamescook): Migrate this into FrameBackground.
  if (!browser_view()->IsToolbarVisible()) {
    // There's no toolbar to edge the frame border, so we need to draw a bottom
    // edge.  The graphic we use for this has a built in client edge, so we clip
    // it off the bottom.
    gfx::ImageSkia* top_center = tp->GetImageSkiaNamed(IDR_APP_TOP_CENTER);
    int edge_height = top_center->height() - kClientEdgeThickness;
    canvas->TileImageInt(*top_center, 0,
        frame()->client_view()->y() - edge_height, width(), edge_height);
  }
}

void OpaqueBrowserFrameView::PaintToolbarBackground(gfx::Canvas* canvas) {
  gfx::Rect toolbar_bounds(browser_view()->GetToolbarBounds());
  if (toolbar_bounds.IsEmpty())
    return;
  gfx::Point toolbar_origin(toolbar_bounds.origin());
  ConvertPointToTarget(browser_view(), this, &toolbar_origin);
  toolbar_bounds.set_origin(toolbar_origin);

  int x = toolbar_bounds.x();
  int w = toolbar_bounds.width();
  int y = toolbar_bounds.y();
  int h = toolbar_bounds.height();

  // Gross hack: We split the toolbar images into two pieces, since sometimes
  // (popup mode) the toolbar isn't tall enough to show the whole image.  The
  // split happens between the top shadow section and the bottom gradient
  // section so that we never break the gradient.
  int split_point = kFrameShadowThickness * 2;
  int bottom_y = y + split_point;
  ui::ThemeProvider* tp = GetThemeProvider();
  gfx::ImageSkia* toolbar_left = tp->GetImageSkiaNamed(
      IDR_CONTENT_TOP_LEFT_CORNER);
  int bottom_edge_height = std::min(toolbar_left->height(), h) - split_point;

  // Split our canvas out so we can mask out the corners of the toolbar
  // without masking out the frame.
  canvas->SaveLayerAlpha(
      255, gfx::Rect(x - kClientEdgeThickness, y, w + kClientEdgeThickness * 3,
                     h));

  // Paint the bottom rect.
  canvas->FillRect(gfx::Rect(x, bottom_y, w, bottom_edge_height),
                   tp->GetColor(ThemeProperties::COLOR_TOOLBAR));

  // Tile the toolbar image starting at the frame edge on the left and where the
  // horizontal tabstrip is (or would be) on the top.
  gfx::ImageSkia* theme_toolbar = tp->GetImageSkiaNamed(IDR_THEME_TOOLBAR);
  canvas->TileImageInt(*theme_toolbar,
                       x + GetThemeBackgroundXInset(),
                       bottom_y - GetTopInset(),
                       x, bottom_y, w, theme_toolbar->height());

  // Draw rounded corners for the tab.
  gfx::ImageSkia* toolbar_left_mask =
      tp->GetImageSkiaNamed(IDR_CONTENT_TOP_LEFT_CORNER_MASK);
  gfx::ImageSkia* toolbar_right_mask =
      tp->GetImageSkiaNamed(IDR_CONTENT_TOP_RIGHT_CORNER_MASK);

  // We mask out the corners by using the DestinationIn transfer mode,
  // which keeps the RGB pixels from the destination and the alpha from
  // the source.
  SkPaint paint;
  paint.setXfermodeMode(SkXfermode::kDstIn_Mode);

  // Mask the left edge.
  int left_x = x - kContentEdgeShadowThickness;
  canvas->DrawImageInt(*toolbar_left_mask, 0, 0, toolbar_left_mask->width(),
                       split_point, left_x, y, toolbar_left_mask->width(),
                       split_point, false, paint);
  canvas->DrawImageInt(*toolbar_left_mask, 0,
      toolbar_left_mask->height() - bottom_edge_height,
      toolbar_left_mask->width(), bottom_edge_height, left_x, bottom_y,
      toolbar_left_mask->width(), bottom_edge_height, false, paint);

  // Mask the right edge.
  int right_x =
      x + w - toolbar_right_mask->width() + kContentEdgeShadowThickness;
  canvas->DrawImageInt(*toolbar_right_mask, 0, 0, toolbar_right_mask->width(),
                       split_point, right_x, y, toolbar_right_mask->width(),
                       split_point, false, paint);
  canvas->DrawImageInt(*toolbar_right_mask, 0,
      toolbar_right_mask->height() - bottom_edge_height,
      toolbar_right_mask->width(), bottom_edge_height, right_x, bottom_y,
      toolbar_right_mask->width(), bottom_edge_height, false, paint);
  canvas->Restore();

  canvas->DrawImageInt(*toolbar_left, 0, 0, toolbar_left->width(), split_point,
                       left_x, y, toolbar_left->width(), split_point, false);
  canvas->DrawImageInt(*toolbar_left, 0,
      toolbar_left->height() - bottom_edge_height, toolbar_left->width(),
      bottom_edge_height, left_x, bottom_y, toolbar_left->width(),
      bottom_edge_height, false);

  gfx::ImageSkia* toolbar_center =
      tp->GetImageSkiaNamed(IDR_CONTENT_TOP_CENTER);
  canvas->TileImageInt(*toolbar_center, 0, 0, left_x + toolbar_left->width(),
      y, right_x - (left_x + toolbar_left->width()),
      split_point);

  gfx::ImageSkia* toolbar_right = tp->GetImageSkiaNamed(
      IDR_CONTENT_TOP_RIGHT_CORNER);
  canvas->DrawImageInt(*toolbar_right, 0, 0, toolbar_right->width(),
      split_point, right_x, y, toolbar_right->width(), split_point, false);
  canvas->DrawImageInt(*toolbar_right, 0,
      toolbar_right->height() - bottom_edge_height, toolbar_right->width(),
      bottom_edge_height, right_x, bottom_y, toolbar_right->width(),
      bottom_edge_height, false);

  // Draw the content/toolbar separator.
  canvas->FillRect(
      gfx::Rect(x + kClientEdgeThickness,
                toolbar_bounds.bottom() - kClientEdgeThickness,
                w - (2 * kClientEdgeThickness),
                kClientEdgeThickness),
      ThemeProperties::GetDefaultColor(
          ThemeProperties::COLOR_TOOLBAR_SEPARATOR));
}

void OpaqueBrowserFrameView::PaintRestoredClientEdge(gfx::Canvas* canvas) {
  ui::ThemeProvider* tp = GetThemeProvider();
  int client_area_top = frame()->client_view()->y();
  int image_top = client_area_top;

  gfx::Rect client_area_bounds =
      layout_->CalculateClientAreaBounds(width(), height());
  SkColor toolbar_color = tp->GetColor(ThemeProperties::COLOR_TOOLBAR);

  if (browser_view()->IsToolbarVisible()) {
    // The client edge images always start below the toolbar corner images.  The
    // client edge filled rects start there or at the bottom of the toolbar,
    // whichever is shorter.
    gfx::Rect toolbar_bounds(browser_view()->GetToolbarBounds());
    image_top += toolbar_bounds.y() +
        tp->GetImageSkiaNamed(IDR_CONTENT_TOP_LEFT_CORNER)->height();
    client_area_top = std::min(image_top,
        client_area_top + toolbar_bounds.bottom() - kClientEdgeThickness);
  } else if (!browser_view()->IsTabStripVisible()) {
    // The toolbar isn't going to draw a client edge for us, so draw one
    // ourselves.
    gfx::ImageSkia* top_left = tp->GetImageSkiaNamed(IDR_APP_TOP_LEFT);
    gfx::ImageSkia* top_center = tp->GetImageSkiaNamed(IDR_APP_TOP_CENTER);
    gfx::ImageSkia* top_right = tp->GetImageSkiaNamed(IDR_APP_TOP_RIGHT);
    int top_edge_y = client_area_top - top_center->height();
    int height = client_area_top - top_edge_y;

    canvas->DrawImageInt(*top_left, 0, 0, top_left->width(), height,
        client_area_bounds.x() - top_left->width(), top_edge_y,
        top_left->width(), height, false);
    canvas->TileImageInt(*top_center, 0, 0, client_area_bounds.x(), top_edge_y,
      client_area_bounds.width(), std::min(height, top_center->height()));
    canvas->DrawImageInt(*top_right, 0, 0, top_right->width(), height,
        client_area_bounds.right(), top_edge_y,
        top_right->width(), height, false);

    // Draw the toolbar color across the top edge.
    canvas->FillRect(gfx::Rect(client_area_bounds.x() - kClientEdgeThickness,
        client_area_top - kClientEdgeThickness,
        client_area_bounds.width() + (2 * kClientEdgeThickness),
        kClientEdgeThickness), toolbar_color);
  }

  int client_area_bottom =
      std::max(client_area_top, height() - NonClientBorderThickness());
  int image_height = client_area_bottom - image_top;

  // Draw the client edge images.
  gfx::ImageSkia* right = tp->GetImageSkiaNamed(IDR_CONTENT_RIGHT_SIDE);
  canvas->TileImageInt(*right, client_area_bounds.right(), image_top,
                       right->width(), image_height);
  canvas->DrawImageInt(
      *tp->GetImageSkiaNamed(IDR_CONTENT_BOTTOM_RIGHT_CORNER),
      client_area_bounds.right(), client_area_bottom);
  gfx::ImageSkia* bottom = tp->GetImageSkiaNamed(IDR_CONTENT_BOTTOM_CENTER);
  canvas->TileImageInt(*bottom, client_area_bounds.x(),
      client_area_bottom, client_area_bounds.width(),
      bottom->height());
  gfx::ImageSkia* bottom_left =
      tp->GetImageSkiaNamed(IDR_CONTENT_BOTTOM_LEFT_CORNER);
  canvas->DrawImageInt(*bottom_left,
      client_area_bounds.x() - bottom_left->width(), client_area_bottom);
  gfx::ImageSkia* left = tp->GetImageSkiaNamed(IDR_CONTENT_LEFT_SIDE);
  canvas->TileImageInt(*left, client_area_bounds.x() - left->width(),
                       image_top, left->width(), image_height);

  // Draw the toolbar color so that the client edges show the right color even
  // where not covered by the toolbar image.  NOTE: We do this after drawing the
  // images because the images are meant to alpha-blend atop the frame whereas
  // these rects are meant to be fully opaque, without anything overlaid.
  canvas->FillRect(gfx::Rect(client_area_bounds.x() - kClientEdgeThickness,
      client_area_top, kClientEdgeThickness,
      client_area_bottom + kClientEdgeThickness - client_area_top),
       toolbar_color);
  canvas->FillRect(gfx::Rect(client_area_bounds.x(), client_area_bottom,
                             client_area_bounds.width(), kClientEdgeThickness),
                   toolbar_color);
  canvas->FillRect(gfx::Rect(client_area_bounds.right(), client_area_top,
      kClientEdgeThickness,
      client_area_bottom + kClientEdgeThickness - client_area_top),
      toolbar_color);
}

SkColor OpaqueBrowserFrameView::GetFrameColor() const {
  bool is_incognito = browser_view()->IsOffTheRecord();
  ThemeProperties::OverwritableByUserThemeProperty color_id;
  if (ShouldPaintAsActive()) {
    color_id = is_incognito ?
               ThemeProperties::COLOR_FRAME_INCOGNITO :
               ThemeProperties::COLOR_FRAME;
  } else {
    color_id = is_incognito ?
               ThemeProperties::COLOR_FRAME_INCOGNITO_INACTIVE :
               ThemeProperties::COLOR_FRAME_INACTIVE;
  }

  if (browser_view()->IsBrowserTypeNormal() ||
      platform_observer_->IsUsingNativeTheme()) {
    return GetThemeProvider()->GetColor(color_id);
  }

  // Never theme app and popup windows unless the |platform_observer_|
  // requested an override.
  return ThemeProperties::GetDefaultColor(color_id);
}

gfx::ImageSkia* OpaqueBrowserFrameView::GetFrameImage() const {
  bool is_incognito = browser_view()->IsOffTheRecord();
  int resource_id;
  if (browser_view()->IsBrowserTypeNormal()) {
    if (ShouldPaintAsActive()) {
      resource_id = is_incognito ?
          IDR_THEME_FRAME_INCOGNITO : IDR_THEME_FRAME;
    } else {
      resource_id = is_incognito ?
          IDR_THEME_FRAME_INCOGNITO_INACTIVE : IDR_THEME_FRAME_INACTIVE;
    }
    return GetThemeProvider()->GetImageSkiaNamed(resource_id);
  }
  if (ShouldPaintAsActive()) {
    resource_id = is_incognito ?
        IDR_THEME_FRAME_INCOGNITO : IDR_FRAME;
  } else {
    resource_id = is_incognito ?
        IDR_THEME_FRAME_INCOGNITO_INACTIVE : IDR_THEME_FRAME_INACTIVE;
  }

  if (platform_observer_->IsUsingNativeTheme()) {
    // We want to use theme images provided by the platform theme when enabled,
    // even if we are an app or popup window.
    return GetThemeProvider()->GetImageSkiaNamed(resource_id);
  }

  // Otherwise, never theme app and popup windows.
  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  return rb.GetImageSkiaNamed(chrome::MapThemeImage(
      chrome::GetHostDesktopTypeForNativeWindow(
          browser_view()->GetNativeWindow()),
      resource_id));
}

gfx::ImageSkia* OpaqueBrowserFrameView::GetFrameOverlayImage() const {
  ui::ThemeProvider* tp = GetThemeProvider();
  if (tp->HasCustomImage(IDR_THEME_FRAME_OVERLAY) &&
      browser_view()->IsBrowserTypeNormal() &&
      !browser_view()->IsOffTheRecord()) {
    return tp->GetImageSkiaNamed(ShouldPaintAsActive() ?
        IDR_THEME_FRAME_OVERLAY : IDR_THEME_FRAME_OVERLAY_INACTIVE);
  }
  return NULL;
}

int OpaqueBrowserFrameView::GetTopAreaHeight() const {
  gfx::ImageSkia* frame_image = GetFrameImage();
  int top_area_height = frame_image->height();
  if (browser_view()->IsTabStripVisible()) {
    top_area_height = std::max(top_area_height,
      GetBoundsForTabStrip(browser_view()->tabstrip()).bottom());
  }
  return top_area_height;
}
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root/chrome/browser/ui/views/frame/opaque_browser_frame_view.cc

DEFINITIONS
