constrained_window_views.cc revision 8bcbed890bc3ce4d7a057a8f32cab53fa534672e 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/ui/views/constrained_window_views.h"
6
7#include <algorithm>
8
9#include "chrome/browser/themes/theme_properties.h"
10#include "chrome/browser/ui/browser_finder.h"
11#include "chrome/browser/ui/views/theme_image_mapper.h"
12#include "components/web_modal/web_contents_modal_dialog_host.h"
13#include "grit/theme_resources.h"
14#include "grit/ui_resources.h"
15#include "ui/base/hit_test.h"
16#include "ui/base/resource/resource_bundle.h"
17#include "ui/gfx/canvas.h"
18#include "ui/gfx/font.h"
19#include "ui/views/border.h"
20#include "ui/views/color_constants.h"
21#include "ui/views/controls/button/image_button.h"
22#include "ui/views/widget/widget.h"
23#include "ui/views/widget/widget_observer.h"
24#include "ui/views/window/dialog_delegate.h"
25#include "ui/views/window/frame_background.h"
26#include "ui/views/window/window_resources.h"
27#include "ui/views/window/window_shape.h"
28
29#if defined(OS_WIN) && !defined(USE_AURA)
30#include "ui/base/win/shell.h"
31#include "ui/views/widget/native_widget_win.h"
32#endif
33
34#if defined(USE_AURA)
35#include "ui/aura/window.h"
36#endif
37
38#if defined(USE_ASH)
39#include "ash/wm/custom_frame_view_ash.h"
40#endif
41
42using web_modal::ModalDialogHost;
43using web_modal::ModalDialogHostObserver;
44
45namespace {
46// The name of a key to store on the window handle to associate
47// BrowserModalDialogHostObserverViews with the Widget.
48const char* const kBrowserModalDialogHostObserverViewsKey =
49    "__BROWSER_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";
50
51// Applies positioning changes from the ModalDialogHost to the Widget.
52class BrowserModalDialogHostObserverViews
53    : public views::WidgetObserver,
54      public ModalDialogHostObserver {
55 public:
56  BrowserModalDialogHostObserverViews(
57      ModalDialogHost* host,
58      views::Widget* target_widget,
59      const char *const native_window_property)
60      : host_(host),
61        target_widget_(target_widget),
62        native_window_property_(native_window_property) {
63    DCHECK(host_);
64    DCHECK(target_widget_);
65    host_->AddObserver(this);
66    target_widget_->AddObserver(this);
67  }
68
69  virtual ~BrowserModalDialogHostObserverViews() {
70    if (host_)
71      host_->RemoveObserver(this);
72    target_widget_->RemoveObserver(this);
73    target_widget_->SetNativeWindowProperty(native_window_property_,
74                                            NULL);
75  }
76
77  // WidgetObserver overrides
78  virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE {
79    delete this;
80  }
81
82  // WebContentsModalDialogHostObserver overrides
83  virtual void OnPositionRequiresUpdate() OVERRIDE {
84    UpdateBrowserModalDialogPosition(target_widget_, host_);
85  }
86
87  virtual void OnHostDestroying() OVERRIDE {
88    host_->RemoveObserver(this);
89    host_ = NULL;
90  }
91
92 private:
93  ModalDialogHost* host_;
94  views::Widget* target_widget_;
95  const char* const native_window_property_;
96
97  DISALLOW_COPY_AND_ASSIGN(BrowserModalDialogHostObserverViews);
98};
99
100void UpdateModalDialogPosition(
101    views::Widget* widget,
102    web_modal::ModalDialogHost* dialog_host,
103    const gfx::Size& size) {
104  // Do not forcibly update the dialog widget position if it is being dragged.
105  if (widget->HasCapture())
106    return;
107
108  gfx::Point position = dialog_host->GetDialogPosition(size);
109  views::Border* border =
110      widget->non_client_view()->frame_view()->border();
111  // Border may be null during widget initialization.
112  if (border) {
113    // Align the first row of pixels inside the border. This is the apparent
114    // top of the dialog.
115    position.set_y(position.y() - border->GetInsets().top());
116  }
117
118  if (widget->is_top_level()) {
119    position +=
120        views::Widget::GetWidgetForNativeView(dialog_host->GetHostView())->
121            GetClientAreaBoundsInScreen().OffsetFromOrigin();
122  }
123
124  widget->SetBounds(gfx::Rect(position, size));
125}
126
127}  // namespace
128
129// An enumeration of image resources used by this window.
130enum {
131  FRAME_PART_IMAGE_FIRST = 0,  // Must be first.
132
133  // Window Frame Border.
134  FRAME_BOTTOM_EDGE,
135  FRAME_BOTTOM_LEFT_CORNER,
136  FRAME_BOTTOM_RIGHT_CORNER,
137  FRAME_LEFT_EDGE,
138  FRAME_RIGHT_EDGE,
139  FRAME_TOP_EDGE,
140  FRAME_TOP_LEFT_CORNER,
141  FRAME_TOP_RIGHT_CORNER,
142
143  FRAME_PART_IMAGE_COUNT  // Must be last.
144};
145
146static const int kXPFramePartIDs[] = {
147    0,
148    IDR_WINDOW_BOTTOM_CENTER, IDR_WINDOW_BOTTOM_LEFT_CORNER,
149    IDR_WINDOW_BOTTOM_RIGHT_CORNER, IDR_WINDOW_LEFT_SIDE,
150    IDR_WINDOW_RIGHT_SIDE, IDR_WINDOW_TOP_CENTER,
151    IDR_WINDOW_TOP_LEFT_CORNER, IDR_WINDOW_TOP_RIGHT_CORNER,
152    0 };
153static const int kVistaFramePartIDs[] = {
154    0,
155    IDR_CONSTRAINED_BOTTOM_CENTER_V, IDR_CONSTRAINED_BOTTOM_LEFT_CORNER_V,
156    IDR_CONSTRAINED_BOTTOM_RIGHT_CORNER_V, IDR_CONSTRAINED_LEFT_SIDE_V,
157    IDR_CONSTRAINED_RIGHT_SIDE_V, IDR_CONSTRAINED_TOP_CENTER_V,
158    IDR_CONSTRAINED_TOP_LEFT_CORNER_V, IDR_CONSTRAINED_TOP_RIGHT_CORNER_V,
159    0 };
160
161class XPWindowResources : public views::WindowResources {
162 public:
163  XPWindowResources() {
164    InitClass();
165  }
166  virtual ~XPWindowResources() {}
167
168  virtual gfx::ImageSkia* GetPartImage(
169      views::FramePartImage part_id) const OVERRIDE {
170    return images_[part_id];
171  }
172
173 private:
174  static void InitClass() {
175    static bool initialized = false;
176    if (!initialized) {
177      ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
178      for (int i = 0; i < FRAME_PART_IMAGE_COUNT; ++i) {
179        int id = kXPFramePartIDs[i];
180        if (id != 0)
181          images_[i] = rb.GetImageSkiaNamed(id);
182      }
183      initialized = true;
184    }
185  }
186
187  static gfx::ImageSkia* images_[FRAME_PART_IMAGE_COUNT];
188
189  DISALLOW_COPY_AND_ASSIGN(XPWindowResources);
190};
191
192class VistaWindowResources : public views::WindowResources {
193 public:
194  VistaWindowResources() {
195    InitClass();
196  }
197  virtual ~VistaWindowResources() {}
198
199  virtual gfx::ImageSkia* GetPartImage(
200      views::FramePartImage part_id) const OVERRIDE {
201    return images_[part_id];
202  }
203
204 private:
205  static void InitClass() {
206    static bool initialized = false;
207    if (!initialized) {
208      ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
209      for (int i = 0; i < FRAME_PART_IMAGE_COUNT; ++i) {
210        int id = kVistaFramePartIDs[i];
211        if (id != 0)
212          images_[i] = rb.GetImageSkiaNamed(id);
213      }
214      initialized = true;
215    }
216  }
217
218  static gfx::ImageSkia* images_[FRAME_PART_IMAGE_COUNT];
219
220  DISALLOW_COPY_AND_ASSIGN(VistaWindowResources);
221};
222
223gfx::ImageSkia* XPWindowResources::images_[];
224gfx::ImageSkia* VistaWindowResources::images_[];
225
226class ConstrainedWindowFrameView : public views::NonClientFrameView,
227                                   public views::ButtonListener {
228 public:
229  ConstrainedWindowFrameView(views::Widget* container,
230                             bool browser_is_off_the_record);
231  virtual ~ConstrainedWindowFrameView();
232
233  virtual void UpdateWindowTitle() OVERRIDE;
234
235  // Overridden from views::NonClientFrameView:
236  virtual gfx::Rect GetBoundsForClientView() const OVERRIDE;
237  virtual gfx::Rect GetWindowBoundsForClientBounds(
238      const gfx::Rect& client_bounds) const OVERRIDE;
239  virtual int NonClientHitTest(const gfx::Point& point) OVERRIDE;
240  virtual void GetWindowMask(const gfx::Size& size,
241                             gfx::Path* window_mask) OVERRIDE;
242  virtual void ResetWindowControls() OVERRIDE {}
243  virtual void UpdateWindowIcon() OVERRIDE {}
244
245  // Overridden from views::View:
246  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
247  virtual void Layout() OVERRIDE;
248  virtual void OnThemeChanged() OVERRIDE;
249
250  // Overridden from views::ButtonListener:
251  virtual void ButtonPressed(views::Button* sender,
252                             const ui::Event& event) OVERRIDE;
253
254 private:
255  // Returns the thickness of the entire nonclient left, right, and bottom
256  // borders, including both the window frame and any client edge.
257  int NonClientBorderThickness() const;
258
259  // Returns the height of the entire nonclient top border, including the window
260  // frame, any title area, and any connected client edge.
261  int NonClientTopBorderHeight() const;
262
263  // Returns the thickness of the nonclient portion of the 3D edge along the
264  // bottom of the titlebar.
265  int TitlebarBottomThickness() const;
266
267  // Returns what the size of the titlebar icon would be if there was one.
268  int IconSize() const;
269
270  // Returns what the titlebar icon's bounds would be if there was one.
271  gfx::Rect IconBounds() const;
272
273  // Paints different parts of the window to the incoming canvas.
274  void PaintFrameBorder(gfx::Canvas* canvas);
275  void PaintTitleBar(gfx::Canvas* canvas);
276  void PaintClientEdge(gfx::Canvas* canvas);
277
278  // Layout various sub-components of this view.
279  void LayoutWindowControls();
280  void LayoutTitleBar();
281
282  // Returns the bounds of the client area for the specified view size.
283  gfx::Rect CalculateClientAreaBounds(int width, int height) const;
284
285  SkColor GetTitleColor() const {
286    return browser_is_off_the_record_
287#if defined(OS_WIN) && !defined(USE_AURA)
288            || !ui::win::IsAeroGlassEnabled()
289#endif
290            ? SK_ColorWHITE : SK_ColorBLACK;
291  }
292
293  // Loads the appropriate set of WindowResources for the frame view.
294  void InitWindowResources();
295
296  views::Widget* container_;
297
298  bool browser_is_off_the_record_;
299
300  scoped_ptr<views::WindowResources> resources_;
301
302  gfx::Rect title_bounds_;
303
304  views::ImageButton* close_button_;
305
306  // The bounds of the ClientView.
307  gfx::Rect client_view_bounds_;
308
309  // Background painter for the frame.
310  scoped_ptr<views::FrameBackground> frame_background_;
311
312  static void InitClass();
313
314  // The font to be used to render the titlebar text.
315  static const gfx::Font* title_font_;
316
317  DISALLOW_COPY_AND_ASSIGN(ConstrainedWindowFrameView);
318};
319
320const gfx::Font* ConstrainedWindowFrameView::title_font_ = NULL;
321
322namespace {
323// The frame border is only visible in restored mode and is hardcoded to 4 px on
324// each side regardless of the system window border size.
325const int kFrameBorderThickness = 4;
326// In the window corners, the resize areas don't actually expand bigger, but the
327// 16 px at the end of each edge triggers diagonal resizing.
328const int kResizeAreaCornerSize = 16;
329// The titlebar never shrinks too short to show the caption button plus some
330// padding below it.
331const int kCaptionButtonHeightWithPadding = 19;
332// The titlebar has a 2 px 3D edge along the top and bottom.
333const int kTitlebarTopAndBottomEdgeThickness = 2;
334// The icon would never shrink below 16 px on a side, if there was one.
335const int kIconMinimumSize = 16;
336// The title text starts 2 px from the right edge of the left frame border.
337const int kTitleLeftSpacing = 2;
338// There is a 5 px gap between the title text and the caption buttons.
339const int kTitleCaptionSpacing = 5;
340
341const SkColor kContentsBorderShadow = SkColorSetARGB(51, 0, 0, 0);
342
343}  // namespace
344
345ConstrainedWindowFrameView::ConstrainedWindowFrameView(
346    views::Widget* container, bool browser_is_off_the_record)
347    : NonClientFrameView(),
348      container_(container),
349      browser_is_off_the_record_(browser_is_off_the_record),
350      close_button_(new views::ImageButton(this)),
351      frame_background_(new views::FrameBackground()) {
352  InitClass();
353  InitWindowResources();
354
355  // Constrained windows always use the custom frame - they just have a
356  // different set of images.
357  container->set_frame_type(views::Widget::FRAME_TYPE_FORCE_CUSTOM);
358
359  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
360  close_button_->SetImage(views::CustomButton::STATE_NORMAL,
361                          rb.GetImageSkiaNamed(IDR_CLOSE_SA));
362  close_button_->SetImage(views::CustomButton::STATE_HOVERED,
363                          rb.GetImageSkiaNamed(IDR_CLOSE_SA_H));
364  close_button_->SetImage(views::CustomButton::STATE_PRESSED,
365                          rb.GetImageSkiaNamed(IDR_CLOSE_SA_P));
366  close_button_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
367                                   views::ImageButton::ALIGN_MIDDLE);
368  AddChildView(close_button_);
369}
370
371ConstrainedWindowFrameView::~ConstrainedWindowFrameView() {
372}
373
374void ConstrainedWindowFrameView::UpdateWindowTitle() {
375  SchedulePaintInRect(title_bounds_);
376}
377
378gfx::Rect ConstrainedWindowFrameView::GetBoundsForClientView() const {
379  return client_view_bounds_;
380}
381
382gfx::Rect ConstrainedWindowFrameView::GetWindowBoundsForClientBounds(
383    const gfx::Rect& client_bounds) const {
384  int top_height = NonClientTopBorderHeight();
385  int border_thickness = NonClientBorderThickness();
386  return gfx::Rect(std::max(0, client_bounds.x() - border_thickness),
387                   std::max(0, client_bounds.y() - top_height),
388                   client_bounds.width() + (2 * border_thickness),
389                   client_bounds.height() + top_height + border_thickness);
390}
391
392int ConstrainedWindowFrameView::NonClientHitTest(const gfx::Point& point) {
393  if (!bounds().Contains(point))
394    return HTNOWHERE;
395
396  int frame_component =
397      container_->client_view()->NonClientHitTest(point);
398
399  // See if we're in the sysmenu region.  (We check the ClientView first to be
400  // consistent with OpaqueBrowserFrameView; it's not really necessary here.)
401  gfx::Rect sysmenu_rect(IconBounds());
402  sysmenu_rect.set_x(GetMirroredXForRect(sysmenu_rect));
403  if (sysmenu_rect.Contains(point))
404    return (frame_component == HTCLIENT) ? HTCLIENT : HTSYSMENU;
405
406  if (frame_component != HTNOWHERE)
407    return frame_component;
408
409  // Then see if the point is within any of the window controls.
410  if (close_button_->GetMirroredBounds().Contains(point))
411    return HTCLOSE;
412
413  int window_component = GetHTComponentForFrame(point, kFrameBorderThickness,
414      NonClientBorderThickness(), kResizeAreaCornerSize, kResizeAreaCornerSize,
415      container_->widget_delegate()->CanResize());
416  // Fall back to the caption if no other component matches.
417  return (window_component == HTNOWHERE) ? HTCAPTION : window_component;
418}
419
420void ConstrainedWindowFrameView::GetWindowMask(const gfx::Size& size,
421                                               gfx::Path* window_mask) {
422  DCHECK(window_mask);
423  views::GetDefaultWindowMask(size, window_mask);
424}
425
426void ConstrainedWindowFrameView::OnPaint(gfx::Canvas* canvas) {
427  PaintFrameBorder(canvas);
428  PaintTitleBar(canvas);
429  PaintClientEdge(canvas);
430}
431
432void ConstrainedWindowFrameView::Layout() {
433  LayoutWindowControls();
434  LayoutTitleBar();
435  client_view_bounds_ = CalculateClientAreaBounds(width(), height());
436}
437
438void ConstrainedWindowFrameView::OnThemeChanged() {
439  InitWindowResources();
440}
441
442void ConstrainedWindowFrameView::ButtonPressed(
443    views::Button* sender, const ui::Event& event) {
444  if (sender == close_button_)
445    container_->Close();
446}
447
448int ConstrainedWindowFrameView::NonClientBorderThickness() const {
449  return kFrameBorderThickness + kClientEdgeThickness;
450}
451
452int ConstrainedWindowFrameView::NonClientTopBorderHeight() const {
453  return std::max(kFrameBorderThickness + IconSize(),
454                  kFrameShadowThickness + kCaptionButtonHeightWithPadding) +
455      TitlebarBottomThickness();
456}
457
458int ConstrainedWindowFrameView::TitlebarBottomThickness() const {
459  return kTitlebarTopAndBottomEdgeThickness + kClientEdgeThickness;
460}
461
462int ConstrainedWindowFrameView::IconSize() const {
463#if defined(OS_WIN)
464  // This metric scales up if either the titlebar height or the titlebar font
465  // size are increased.
466  return GetSystemMetrics(SM_CYSMICON);
467#else
468  return std::max(title_font_->GetHeight(), kIconMinimumSize);
469#endif
470}
471
472gfx::Rect ConstrainedWindowFrameView::IconBounds() const {
473  int size = IconSize();
474  // Our frame border has a different "3D look" than Windows'.  Theirs has a
475  // more complex gradient on the top that they push their icon/title below;
476  // then the maximized window cuts this off and the icon/title are centered
477  // in the remaining space.  Because the apparent shape of our border is
478  // simpler, using the same positioning makes things look slightly uncentered
479  // with restored windows, so instead of calculating the remaining space from
480  // below the frame border, we calculate from below the 3D edge.
481  int unavailable_px_at_top = kTitlebarTopAndBottomEdgeThickness;
482  // When the icon is shorter than the minimum space we reserve for the caption
483  // button, we vertically center it.  We want to bias rounding to put extra
484  // space above the icon, since the 3D edge + client edge below looks (to the
485  // eye) more like additional space than does the 3D edge above; hence the +1.
486  int y = unavailable_px_at_top + (NonClientTopBorderHeight() -
487      unavailable_px_at_top - size - TitlebarBottomThickness() + 1) / 2;
488  return gfx::Rect(kFrameBorderThickness + kTitleLeftSpacing, y, size, size);
489}
490
491void ConstrainedWindowFrameView::PaintFrameBorder(gfx::Canvas* canvas) {
492  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
493  frame_background_->set_frame_color(ThemeProperties::GetDefaultColor(
494      ThemeProperties::COLOR_FRAME));
495  chrome::HostDesktopType desktop_type =
496      chrome::GetHostDesktopTypeForNativeView(GetWidget()->GetNativeView());
497  gfx::ImageSkia* theme_frame = rb.GetImageSkiaNamed(
498      chrome::MapThemeImage(desktop_type, IDR_THEME_FRAME));
499  frame_background_->set_theme_image(theme_frame);
500  frame_background_->set_theme_overlay_image(NULL);
501  frame_background_->set_top_area_height(theme_frame->height());
502
503  frame_background_->SetCornerImages(
504      resources_->GetPartImage(FRAME_TOP_LEFT_CORNER),
505      resources_->GetPartImage(FRAME_TOP_RIGHT_CORNER),
506      resources_->GetPartImage(FRAME_BOTTOM_LEFT_CORNER),
507      resources_->GetPartImage(FRAME_BOTTOM_RIGHT_CORNER));
508  frame_background_->SetSideImages(
509      resources_->GetPartImage(FRAME_LEFT_EDGE),
510      resources_->GetPartImage(FRAME_TOP_EDGE),
511      resources_->GetPartImage(FRAME_RIGHT_EDGE),
512      resources_->GetPartImage(FRAME_BOTTOM_EDGE));
513  frame_background_->PaintRestored(canvas, this);
514}
515
516void ConstrainedWindowFrameView::PaintTitleBar(gfx::Canvas* canvas) {
517  canvas->DrawStringInt(
518      container_->widget_delegate()->GetWindowTitle(),
519      *title_font_, GetTitleColor(), GetMirroredXForRect(title_bounds_),
520      title_bounds_.y(), title_bounds_.width(), title_bounds_.height());
521}
522
523void ConstrainedWindowFrameView::PaintClientEdge(gfx::Canvas* canvas) {
524  gfx::Rect client_edge_bounds(CalculateClientAreaBounds(width(), height()));
525  client_edge_bounds.Inset(-kClientEdgeThickness, -kClientEdgeThickness);
526  gfx::Rect frame_shadow_bounds(client_edge_bounds);
527  frame_shadow_bounds.Inset(-kFrameShadowThickness, -kFrameShadowThickness);
528
529  canvas->FillRect(frame_shadow_bounds, kContentsBorderShadow);
530  canvas->FillRect(client_edge_bounds, views::kClientEdgeColor);
531}
532
533void ConstrainedWindowFrameView::LayoutWindowControls() {
534  gfx::Size close_button_size = close_button_->GetPreferredSize();
535  close_button_->SetBounds(
536      width() - kFrameBorderThickness - close_button_size.width(),
537      kFrameShadowThickness, close_button_size.width(),
538      close_button_size.height());
539}
540
541void ConstrainedWindowFrameView::LayoutTitleBar() {
542  // The window title is based on the calculated icon position, even though'
543  // there is no icon in constrained windows.
544  gfx::Rect icon_bounds(IconBounds());
545  int title_x = icon_bounds.x();
546  int title_height = title_font_->GetHeight();
547  // We bias the title position so that when the difference between the icon and
548  // title heights is odd, the extra pixel of the title is above the vertical
549  // midline rather than below.  This compensates for how the icon is already
550  // biased downwards (see IconBounds()) and helps prevent descenders on the
551  // title from overlapping the 3D edge at the bottom of the titlebar.
552  title_bounds_.SetRect(title_x,
553      icon_bounds.y() + ((icon_bounds.height() - title_height - 1) / 2),
554      std::max(0, close_button_->x() - kTitleCaptionSpacing - title_x),
555      title_height);
556}
557
558gfx::Rect ConstrainedWindowFrameView::CalculateClientAreaBounds(
559    int width,
560    int height) const {
561  int top_height = NonClientTopBorderHeight();
562  int border_thickness = NonClientBorderThickness();
563  return gfx::Rect(border_thickness, top_height,
564                   std::max(0, width - (2 * border_thickness)),
565                   std::max(0, height - top_height - border_thickness));
566}
567
568void ConstrainedWindowFrameView::InitWindowResources() {
569#if defined(OS_WIN) && !defined(USE_AURA)
570  resources_.reset(ui::win::IsAeroGlassEnabled() ?
571      static_cast<views::WindowResources*>(new VistaWindowResources) :
572      new XPWindowResources);
573#else
574  // TODO(oshima): Use aura frame decoration.
575  resources_.reset(new XPWindowResources);
576#endif
577}
578
579// static
580void ConstrainedWindowFrameView::InitClass() {
581  static bool initialized = false;
582  if (!initialized) {
583#if defined(OS_WIN) && !defined(USE_AURA)
584    title_font_ = new gfx::Font(views::NativeWidgetWin::GetWindowTitleFont());
585#else
586    ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
587    title_font_ = &rb.GetFont(ui::ResourceBundle::MediumFont);
588#endif
589    initialized = true;
590  }
591}
592
593void UpdateWebContentsModalDialogPosition(
594    views::Widget* widget,
595    web_modal::WebContentsModalDialogHost* dialog_host) {
596  gfx::Size size = widget->GetRootView()->GetPreferredSize();
597  gfx::Size max_size = dialog_host->GetMaximumDialogSize();
598  // Enlarge the max size by the top border, as the dialog will be shifted
599  // outside the area specified by the dialog host by this amount later.
600  views::Border* border =
601      widget->non_client_view()->frame_view()->border();
602  // Border may be null during widget initialization.
603  if (border)
604    max_size.Enlarge(0, border->GetInsets().top());
605  size.SetToMin(max_size);
606  UpdateModalDialogPosition(widget, dialog_host, size);
607}
608
609void UpdateBrowserModalDialogPosition(
610    views::Widget* widget,
611    web_modal::ModalDialogHost* dialog_host) {
612  UpdateModalDialogPosition(widget,
613                            dialog_host,
614                            widget->GetRootView()->GetPreferredSize());
615}
616
617views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
618                                             gfx::NativeWindow parent) {
619  views::Widget* widget =
620      views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent);
621  if (!dialog->UseNewStyleForThisDialog())
622    return widget;
623
624  // Get the browser dialog management and hosting components from |parent|.
625  Browser* browser = chrome::FindBrowserWithWindow(parent);
626  if (browser) {
627    ChromeWebModalDialogManagerDelegate* manager = browser;
628    ModalDialogHost* host = manager->GetWebContentsModalDialogHost();
629    DCHECK_EQ(parent, host->GetHostView());
630    ModalDialogHostObserver* dialog_host_observer =
631        new BrowserModalDialogHostObserverViews(
632            host, widget, kBrowserModalDialogHostObserverViewsKey);
633    dialog_host_observer->OnPositionRequiresUpdate();
634  }
635  return widget;
636}
637
638views::NonClientFrameView* CreateConstrainedStyleNonClientFrameView(
639    views::Widget* widget,
640    content::BrowserContext* browser_context) {
641  if (views::DialogDelegate::UseNewStyle()) {
642#if defined(USE_AURA)
643    const bool force_opaque_border = false;
644#else
645    const bool force_opaque_border = true;
646#endif
647    return views::DialogDelegate::CreateNewStyleFrameView(widget,
648                                                          force_opaque_border);
649  }
650#if defined(USE_ASH)
651  ash::CustomFrameViewAsh* frame = new ash::CustomFrameViewAsh(widget);
652  // Always use "active" look.
653  frame->SetInactiveRenderingDisabled(true);
654  return frame;
655#endif
656  return new ConstrainedWindowFrameView(widget,
657                                        browser_context->IsOffTheRecord());
658}
659