views/window/custom_frame_view.cc

// Copyright (c) 2010 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 "views/window/custom_frame_view.h"

#include "app/l10n_util.h"
#include "app/resource_bundle.h"
#include "app/theme_provider.h"
#if defined(OS_WIN)
#include "app/win_util.h"
#include "base/win_util.h"
#endif
#include "gfx/canvas.h"
#include "gfx/font.h"
#include "gfx/path.h"
#include "grit/app_resources.h"
#include "grit/app_strings.h"
#include "views/window/client_view.h"
#include "views/window/window_shape.h"
#if defined(OS_LINUX)
#include "views/window/hit_test.h"
#endif
#include "views/window/window_delegate.h"

namespace views {

// static
gfx::Font* CustomFrameView::title_font_ = NULL;

namespace {
// The frame border is only visible in restored mode and is hardcoded to 4 px on
// each side regardless of the system window border size.
const int kFrameBorderThickness = 4;
// Various edges of the frame border have a 1 px shadow along their edges; in a
// few cases we shift elements based on this amount for visual appeal.
const int kFrameShadowThickness = 1;
// 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 titlebar never shrinks too short to show the caption button plus some
// padding below it.
const int kCaptionButtonHeightWithPadding = 19;
// The titlebar has a 2 px 3D edge along the top and bottom.
const int kTitlebarTopAndBottomEdgeThickness = 2;
// The icon is inset 2 px from the left frame border.
const int kIconLeftSpacing = 2;
// The icon never shrinks below 16 px on a side.
const int kIconMinimumSize = 16;
// There is a 4 px gap between the icon and the title text.
const int kIconTitleSpacing = 4;
// There is a 5 px gap between the title text and the caption buttons.
const int kTitleCaptionSpacing = 5;
}

///////////////////////////////////////////////////////////////////////////////
// CustomFrameView, public:

CustomFrameView::CustomFrameView(Window* frame)
    : NonClientFrameView(),
      ALLOW_THIS_IN_INITIALIZER_LIST(close_button_(new ImageButton(this))),
      ALLOW_THIS_IN_INITIALIZER_LIST(restore_button_(new ImageButton(this))),
      ALLOW_THIS_IN_INITIALIZER_LIST(maximize_button_(new ImageButton(this))),
      ALLOW_THIS_IN_INITIALIZER_LIST(minimize_button_(new ImageButton(this))),
      window_icon_(NULL),
      should_show_minmax_buttons_(false),
      should_show_client_edge_(false),
      frame_(frame) {
  InitClass();

  ResourceBundle& rb = ResourceBundle::GetSharedInstance();

  close_button_->SetAccessibleName(l10n_util::GetString(IDS_APP_ACCNAME_CLOSE));

  // Close button images will be set in LayoutWindowControls().
  AddChildView(close_button_);

  restore_button_->SetAccessibleName(
      l10n_util::GetString(IDS_APP_ACCNAME_RESTORE));
  restore_button_->SetImage(CustomButton::BS_NORMAL,
                            rb.GetBitmapNamed(IDR_RESTORE));
  restore_button_->SetImage(CustomButton::BS_HOT,
                            rb.GetBitmapNamed(IDR_RESTORE_H));
  restore_button_->SetImage(CustomButton::BS_PUSHED,
                            rb.GetBitmapNamed(IDR_RESTORE_P));
  AddChildView(restore_button_);

  maximize_button_->SetAccessibleName(
    l10n_util::GetString(IDS_APP_ACCNAME_MAXIMIZE));
  maximize_button_->SetImage(CustomButton::BS_NORMAL,
                             rb.GetBitmapNamed(IDR_MAXIMIZE));
  maximize_button_->SetImage(CustomButton::BS_HOT,
                             rb.GetBitmapNamed(IDR_MAXIMIZE_H));
  maximize_button_->SetImage(CustomButton::BS_PUSHED,
                             rb.GetBitmapNamed(IDR_MAXIMIZE_P));
  AddChildView(maximize_button_);

  minimize_button_->SetAccessibleName(
      l10n_util::GetString(IDS_APP_ACCNAME_MINIMIZE));
  minimize_button_->SetImage(CustomButton::BS_NORMAL,
                             rb.GetBitmapNamed(IDR_MINIMIZE));
  minimize_button_->SetImage(CustomButton::BS_HOT,
                             rb.GetBitmapNamed(IDR_MINIMIZE_H));
  minimize_button_->SetImage(CustomButton::BS_PUSHED,
                             rb.GetBitmapNamed(IDR_MINIMIZE_P));
  AddChildView(minimize_button_);

  views::WindowDelegate* d = frame_->GetDelegate();
  should_show_minmax_buttons_ = d->CanMaximize();
  should_show_client_edge_ = d->ShouldShowClientEdge();

  if (d->ShouldShowWindowIcon()) {
    window_icon_ = new ImageButton(this);
    AddChildView(window_icon_);
  }
}

CustomFrameView::~CustomFrameView() {
}

///////////////////////////////////////////////////////////////////////////////
// CustomFrameView, NonClientFrameView implementation:

gfx::Rect CustomFrameView::GetBoundsForClientView() const {
  return client_view_bounds_;
}

gfx::Rect CustomFrameView::GetWindowBoundsForClientBounds(
    const gfx::Rect& client_bounds) const {
  int top_height = NonClientTopBorderHeight();
  int border_thickness = NonClientBorderThickness();
  return gfx::Rect(std::max(0, client_bounds.x() - border_thickness),
                   std::max(0, client_bounds.y() - top_height),
                   client_bounds.width() + (2 * border_thickness),
                   client_bounds.height() + top_height + border_thickness);
}

int CustomFrameView::NonClientHitTest(const gfx::Point& point) {
  // Sanity check.
  if (!bounds().Contains(point))
    return HTNOWHERE;

  int frame_component = frame_->GetClientView()->NonClientHitTest(point);

  // See if we're in the sysmenu region.  (We check the ClientView first to be
  // consistent with OpaqueBrowserFrameView; it's not really necessary here.)
  gfx::Rect sysmenu_rect(IconBounds());
  // In maximized mode we extend the rect to the screen corner to take advantage
  // of Fitts' Law.
  if (frame_->IsMaximized())
    sysmenu_rect.SetRect(0, 0, sysmenu_rect.right(), sysmenu_rect.bottom());
  sysmenu_rect.set_x(MirroredLeftPointForRect(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_->GetBounds(APPLY_MIRRORING_TRANSFORMATION).Contains(point))
    return HTCLOSE;
  if (restore_button_->GetBounds(APPLY_MIRRORING_TRANSFORMATION).Contains(
      point))
    return HTMAXBUTTON;
  if (maximize_button_->GetBounds(APPLY_MIRRORING_TRANSFORMATION).Contains(
      point))
    return HTMAXBUTTON;
  if (minimize_button_->GetBounds(APPLY_MIRRORING_TRANSFORMATION).Contains(
      point))
    return HTMINBUTTON;
  if (window_icon_ &&
      window_icon_->GetBounds(APPLY_MIRRORING_TRANSFORMATION).Contains(point))
    return HTSYSMENU;

  int window_component = GetHTComponentForFrame(point, FrameBorderThickness(),
      NonClientBorderThickness(), kResizeAreaCornerSize, kResizeAreaCornerSize,
      frame_->GetDelegate()->CanResize());
  // Fall back to the caption if no other component matches.
  return (window_component == HTNOWHERE) ? HTCAPTION : window_component;
}

void CustomFrameView::GetWindowMask(const gfx::Size& size,
                                    gfx::Path* window_mask) {
  DCHECK(window_mask);
  if (frame_->IsMaximized())
    return;

  views::GetDefaultWindowMask(size, window_mask);
}

void CustomFrameView::EnableClose(bool enable) {
  close_button_->SetEnabled(enable);
}

void CustomFrameView::ResetWindowControls() {
  restore_button_->SetState(CustomButton::BS_NORMAL);
  minimize_button_->SetState(CustomButton::BS_NORMAL);
  maximize_button_->SetState(CustomButton::BS_NORMAL);
  // The close button isn't affected by this constraint.
}

///////////////////////////////////////////////////////////////////////////////
// CustomFrameView, View overrides:

void CustomFrameView::Paint(gfx::Canvas* canvas) {
  if (frame_->IsMaximized())
    PaintMaximizedFrameBorder(canvas);
  else
    PaintRestoredFrameBorder(canvas);
  PaintTitleBar(canvas);
  if (ShouldShowClientEdge())
    PaintRestoredClientEdge(canvas);
}

void CustomFrameView::Layout() {
  LayoutWindowControls();
  LayoutTitleBar();
  LayoutClientView();
}

gfx::Size CustomFrameView::GetPreferredSize() {
  gfx::Size pref = frame_->GetClientView()->GetPreferredSize();
  gfx::Rect bounds(0, 0, pref.width(), pref.height());
  return frame_->GetNonClientView()->GetWindowBoundsForClientBounds(
      bounds).size();
}

///////////////////////////////////////////////////////////////////////////////
// CustomFrameView, ButtonListener implementation:

void CustomFrameView::ButtonPressed(Button* sender, const views::Event& event) {
  if (sender == close_button_)
    frame_->Close();
  else if (sender == minimize_button_)
    frame_->Minimize();
  else if (sender == maximize_button_)
    frame_->Maximize();
  else if (sender == restore_button_)
    frame_->Restore();
}

///////////////////////////////////////////////////////////////////////////////
// CustomFrameView, private:

int CustomFrameView::FrameBorderThickness() const {
  return frame_->IsMaximized() ? 0 : kFrameBorderThickness;
}

int CustomFrameView::NonClientBorderThickness() const {
  // In maximized mode, we don't show a client edge.
  return FrameBorderThickness() +
      (ShouldShowClientEdge() ? kClientEdgeThickness : 0);
}

int CustomFrameView::NonClientTopBorderHeight() const {
  return std::max(FrameBorderThickness() + IconSize(),
                  CaptionButtonY() + kCaptionButtonHeightWithPadding) +
      TitlebarBottomThickness();
}

int CustomFrameView::CaptionButtonY() const {
  // Maximized buttons start at window top so that even if their images aren't
  // drawn flush with the screen edge, they still obey Fitts' Law.
  return frame_->IsMaximized() ? FrameBorderThickness() : kFrameShadowThickness;
}

int CustomFrameView::TitlebarBottomThickness() const {
  return kTitlebarTopAndBottomEdgeThickness +
      (ShouldShowClientEdge() ? kClientEdgeThickness : 0);
}

int CustomFrameView::IconSize() 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(title_font_->height(), kIconMinimumSize);
#endif
}

bool CustomFrameView::ShouldShowClientEdge() const {
  return should_show_client_edge_ && !frame_->IsMaximized();
}

gfx::Rect CustomFrameView::IconBounds() const {
  int size = IconSize();
  int frame_thickness = FrameBorderThickness();
  // Our frame border has a different "3D look" than Windows'.  Theirs has a
  // more complex gradient on the top that they push their icon/title below;
  // then the maximized window cuts this off and the icon/title are centered
  // in the remaining space.  Because the apparent shape of our border is
  // simpler, using the same positioning makes things look slightly uncentered
  // with restored windows, so when the window is restored, instead of
  // calculating the remaining space from below the frame border, we calculate
  // from below the 3D edge.
  int unavailable_px_at_top = frame_->IsMaximized() ?
      frame_thickness : kTitlebarTopAndBottomEdgeThickness;
  // When the icon is shorter than the minimum space we reserve for the caption
  // button, we vertically center it.  We want to bias rounding to put extra
  // space above the icon, since the 3D edge (+ client edge, for restored
  // windows) below looks (to the eye) more like additional space than does the
  // 3D edge (or nothing at all, for maximized windows) above; hence the +1.
  int y = unavailable_px_at_top + (NonClientTopBorderHeight() -
      unavailable_px_at_top - size - TitlebarBottomThickness() + 1) / 2;
  return gfx::Rect(frame_thickness + kIconLeftSpacing, y, size, size);
}

void CustomFrameView::PaintRestoredFrameBorder(gfx::Canvas* canvas) {
  // Window frame mode.
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();

  SkBitmap* frame_image;
  SkColor frame_color;
  if (frame_->IsActive()) {
    frame_image = rb.GetBitmapNamed(IDR_FRAME);
    frame_color = ResourceBundle::frame_color;
  } else {
    frame_image = rb.GetBitmapNamed(IDR_FRAME_INACTIVE);
    frame_color = ResourceBundle::frame_color_inactive;
  }

  SkBitmap* top_left_corner = rb.GetBitmapNamed(IDR_WINDOW_TOP_LEFT_CORNER);
  SkBitmap* top_right_corner =
      rb.GetBitmapNamed(IDR_WINDOW_TOP_RIGHT_CORNER);
  SkBitmap* top_edge = rb.GetBitmapNamed(IDR_WINDOW_TOP_CENTER);
  SkBitmap* right_edge = rb.GetBitmapNamed(IDR_WINDOW_RIGHT_SIDE);
  SkBitmap* left_edge = rb.GetBitmapNamed(IDR_WINDOW_LEFT_SIDE);
  SkBitmap* bottom_left_corner =
      rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_LEFT_CORNER);
  SkBitmap* bottom_right_corner =
      rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_RIGHT_CORNER);
  SkBitmap* bottom_edge = rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_CENTER);

  // Fill with the frame color first so we have a constant background for
  // areas not covered by the theme image.
  canvas->FillRectInt(frame_color, 0, 0, width(), frame_image->height());
  // Now fill down the sides.
  canvas->FillRectInt(frame_color, 0, frame_image->height(), left_edge->width(),
                      height() - frame_image->height());
  canvas->FillRectInt(frame_color, width() - right_edge->width(),
                      frame_image->height(), right_edge->width(),
                      height() - frame_image->height());
  // Now fill the bottom area.
  canvas->FillRectInt(frame_color,
      left_edge->width(), height() - bottom_edge->height(),
      width() - left_edge->width() - right_edge->width(),
      bottom_edge->height());

  // Draw the theme frame.
  canvas->TileImageInt(*frame_image, 0, 0, width(), frame_image->height());

  // Top.
  canvas->DrawBitmapInt(*top_left_corner, 0, 0);
  canvas->TileImageInt(*top_edge, top_left_corner->width(), 0,
                       width() - top_right_corner->width(), top_edge->height());
  canvas->DrawBitmapInt(*top_right_corner,
                        width() - top_right_corner->width(), 0);

  // Right.
  canvas->TileImageInt(*right_edge, width() - right_edge->width(),
      top_right_corner->height(), right_edge->width(),
      height() - top_right_corner->height() - bottom_right_corner->height());

  // Bottom.
  canvas->DrawBitmapInt(*bottom_right_corner,
                        width() - bottom_right_corner->width(),
                        height() - bottom_right_corner->height());
  canvas->TileImageInt(*bottom_edge, bottom_left_corner->width(),
      height() - bottom_edge->height(),
      width() - bottom_left_corner->width() - bottom_right_corner->width(),
      bottom_edge->height());
  canvas->DrawBitmapInt(*bottom_left_corner, 0,
                        height() - bottom_left_corner->height());

  // Left.
  canvas->TileImageInt(*left_edge, 0, top_left_corner->height(),
      left_edge->width(),
      height() - top_left_corner->height() - bottom_left_corner->height());
}

void CustomFrameView::PaintMaximizedFrameBorder(gfx::Canvas* canvas) {
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();

  SkBitmap* frame_image = rb.GetBitmapNamed(frame_->IsActive() ?
      IDR_FRAME : IDR_FRAME_INACTIVE);
  canvas->TileImageInt(*frame_image, 0, FrameBorderThickness(), width(),
                       frame_image->height());

  // The bottom of the titlebar actually comes from the top of the Client Edge
  // graphic, with the actual client edge clipped off the bottom.
  SkBitmap* titlebar_bottom = rb.GetBitmapNamed(IDR_APP_TOP_CENTER);
  int edge_height = titlebar_bottom->height() -
                    ShouldShowClientEdge() ? kClientEdgeThickness : 0;
  canvas->TileImageInt(*titlebar_bottom, 0,
      frame_->GetClientView()->y() - edge_height, width(), edge_height);
}

void CustomFrameView::PaintTitleBar(gfx::Canvas* canvas) {
  WindowDelegate* d = frame_->GetDelegate();

  // It seems like in some conditions we can be asked to paint after the window
  // that contains us is WM_DESTROYed. At this point, our delegate is NULL. The
  // correct long term fix may be to shut down the RootView in WM_DESTROY.
  if (!d)
    return;

  canvas->DrawStringInt(d->GetWindowTitle(), *title_font_, SK_ColorWHITE,
      MirroredLeftPointForRect(title_bounds_), title_bounds_.y(),
      title_bounds_.width(), title_bounds_.height());
}

void CustomFrameView::PaintRestoredClientEdge(gfx::Canvas* canvas) {
  gfx::Rect client_area_bounds = frame_->GetClientView()->bounds();
  int client_area_top = client_area_bounds.y();

  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  SkBitmap* top_left = rb.GetBitmapNamed(IDR_APP_TOP_LEFT);
  SkBitmap* top = rb.GetBitmapNamed(IDR_APP_TOP_CENTER);
  SkBitmap* top_right = rb.GetBitmapNamed(IDR_APP_TOP_RIGHT);
  SkBitmap* right = rb.GetBitmapNamed(IDR_CONTENT_RIGHT_SIDE);
  SkBitmap* bottom_right =
      rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_RIGHT_CORNER);
  SkBitmap* bottom = rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_CENTER);
  SkBitmap* bottom_left =
      rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_LEFT_CORNER);
  SkBitmap* left = rb.GetBitmapNamed(IDR_CONTENT_LEFT_SIDE);

  // Top.
  int top_edge_y = client_area_top - top->height();
  canvas->DrawBitmapInt(*top_left, client_area_bounds.x() - top_left->width(),
                        top_edge_y);
  canvas->TileImageInt(*top, client_area_bounds.x(), top_edge_y,
                       client_area_bounds.width(), top->height());
  canvas->DrawBitmapInt(*top_right, client_area_bounds.right(), top_edge_y);

  // Right.
  int client_area_bottom =
      std::max(client_area_top, client_area_bounds.bottom());
  int client_area_height = client_area_bottom - client_area_top;
  canvas->TileImageInt(*right, client_area_bounds.right(), client_area_top,
                       right->width(), client_area_height);

  // Bottom.
  canvas->DrawBitmapInt(*bottom_right, client_area_bounds.right(),
                        client_area_bottom);
  canvas->TileImageInt(*bottom, client_area_bounds.x(), client_area_bottom,
                       client_area_bounds.width(), bottom_right->height());
  canvas->DrawBitmapInt(*bottom_left,
      client_area_bounds.x() - bottom_left->width(), client_area_bottom);

  // Left.
  canvas->TileImageInt(*left, client_area_bounds.x() - left->width(),
      client_area_top, left->width(), client_area_height);

  // Draw the toolbar color to fill in the edges.
  canvas->DrawRectInt(ResourceBundle::toolbar_color,
    client_area_bounds.x() - 1, client_area_top - 1,
    client_area_bounds.width() + 1, client_area_bottom - client_area_top + 1);
}

void CustomFrameView::LayoutWindowControls() {
  close_button_->SetImageAlignment(ImageButton::ALIGN_LEFT,
                                   ImageButton::ALIGN_BOTTOM);
  int caption_y = CaptionButtonY();
  bool is_maximized = frame_->IsMaximized();
  // There should always be the same number of non-shadow pixels visible to the
  // side of the caption buttons.  In maximized mode we extend the rightmost
  // button to the screen corner to obey Fitts' Law.
  int right_extra_width = is_maximized ?
      (kFrameBorderThickness - kFrameShadowThickness) : 0;
  gfx::Size close_button_size = close_button_->GetPreferredSize();
  close_button_->SetBounds(width() - FrameBorderThickness() -
      right_extra_width - close_button_size.width(), caption_y,
      close_button_size.width() + right_extra_width,
      close_button_size.height());

  // When the window is restored, we show a maximized button; otherwise, we show
  // a restore button.
  bool is_restored = !is_maximized && !frame_->IsMinimized();
  views::ImageButton* invisible_button = is_restored ?
      restore_button_ : maximize_button_;
  invisible_button->SetVisible(false);

  views::ImageButton* visible_button = is_restored ?
      maximize_button_ : restore_button_;
  FramePartBitmap normal_part, hot_part, pushed_part;
  if (should_show_minmax_buttons_) {
    visible_button->SetVisible(true);
    visible_button->SetImageAlignment(ImageButton::ALIGN_LEFT,
                                      ImageButton::ALIGN_BOTTOM);
    gfx::Size visible_button_size = visible_button->GetPreferredSize();
    visible_button->SetBounds(close_button_->x() - visible_button_size.width(),
                              caption_y, visible_button_size.width(),
                              visible_button_size.height());

    minimize_button_->SetVisible(true);
    minimize_button_->SetImageAlignment(ImageButton::ALIGN_LEFT,
                                        ImageButton::ALIGN_BOTTOM);
    gfx::Size minimize_button_size = minimize_button_->GetPreferredSize();
    minimize_button_->SetBounds(
        visible_button->x() - minimize_button_size.width(), caption_y,
        minimize_button_size.width(),
        minimize_button_size.height());

    normal_part = IDR_CLOSE;
    hot_part = IDR_CLOSE_H;
    pushed_part = IDR_CLOSE_P;
  } else {
    visible_button->SetVisible(false);
    minimize_button_->SetVisible(false);

    normal_part = IDR_CLOSE_SA;
    hot_part = IDR_CLOSE_SA_H;
    pushed_part = IDR_CLOSE_SA_P;
  }

  ResourceBundle& rb = ResourceBundle::GetSharedInstance();

  close_button_->SetImage(CustomButton::BS_NORMAL,
                          rb.GetBitmapNamed(normal_part));
  close_button_->SetImage(CustomButton::BS_HOT,
                          rb.GetBitmapNamed(hot_part));
  close_button_->SetImage(CustomButton::BS_PUSHED,
                          rb.GetBitmapNamed(pushed_part));
}

void CustomFrameView::LayoutTitleBar() {
  // The window title is based on the calculated icon position, even when there
  // is no icon.
  gfx::Rect icon_bounds(IconBounds());
  views::WindowDelegate* d = frame_->GetDelegate();
  if (d->ShouldShowWindowIcon())
    window_icon_->SetBounds(icon_bounds);

  // Size the title.
  int title_x = d->ShouldShowWindowIcon() ?
      icon_bounds.right() + kIconTitleSpacing : icon_bounds.x();
  int title_height = title_font_->height();
  // We bias the title position so that when the difference between the icon and
  // title heights is odd, the extra pixel of the title is above the vertical
  // midline rather than below.  This compensates for how the icon is already
  // biased downwards (see IconBounds()) and helps prevent descenders on the
  // title from overlapping the 3D edge at the bottom of the titlebar.
  title_bounds_.SetRect(title_x,
      icon_bounds.y() + ((icon_bounds.height() - title_height - 1) / 2),
      std::max(0, (should_show_minmax_buttons_ ?
          minimize_button_->x() : close_button_->x()) - kTitleCaptionSpacing -
      title_x), title_height);
}

void CustomFrameView::LayoutClientView() {
  int top_height = NonClientTopBorderHeight();
  int border_thickness = NonClientBorderThickness();
  client_view_bounds_.SetRect(border_thickness, top_height,
      std::max(0, width() - (2 * border_thickness)),
      std::max(0, height() - top_height - border_thickness));
}

// static
void CustomFrameView::InitClass() {
  static bool initialized = false;
  if (!initialized) {
#if defined(OS_WIN)
    title_font_ = new gfx::Font(win_util::GetWindowTitleFont());
#elif defined(OS_LINUX)
    // TODO(ben): need to resolve what font this is.
    title_font_ = new gfx::Font();
#endif
    initialized = true;
  }
}

}  // namespace views