1// Copyright (c) 2011 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/frame/app_panel_browser_frame_view.h"
6
7#include "base/compiler_specific.h"
8#include "base/utf_string_conversions.h"
9#include "chrome/browser/ui/views/frame/browser_frame.h"
10#include "chrome/browser/ui/views/frame/browser_view.h"
11#include "content/browser/tab_contents/tab_contents.h"
12#include "grit/app_resources.h"
13#include "grit/chromium_strings.h"
14#include "grit/generated_resources.h"
15#include "grit/theme_resources.h"
16#include "ui/base/l10n/l10n_util.h"
17#include "ui/base/resource/resource_bundle.h"
18#include "ui/gfx/canvas.h"
19#include "ui/gfx/font.h"
20#include "ui/gfx/path.h"
21#include "views/controls/button/image_button.h"
22#include "views/window/window.h"
23#include "views/window/window_resources.h"
24
25#if defined(OS_LINUX)
26#include "views/window/hit_test.h"
27#endif
28
29namespace {
30// The frame border is only visible in restored mode and is hardcoded to 1 px on
31// each side regardless of the system window border size.
32const int kFrameBorderThickness = 1;
33// In the window corners, the resize areas don't actually expand bigger, but the
34// 16 px at the end of each edge triggers diagonal resizing.
35const int kResizeAreaCornerSize = 16;
36// The titlebar never shrinks too short to show the caption button plus some
37// padding below it.
38const int kCaptionButtonHeightWithPadding = 27;
39// The titlebar has a 2 px 3D edge along the bottom, and we reserve 2 px (1 for
40// border, 1 for padding) along the top.
41const int kTitlebarTopAndBottomEdgeThickness = 2;
42// The icon is inset 6 px from the left frame border.
43const int kIconLeftSpacing = 6;
44// The icon never shrinks below 16 px on a side.
45const int kIconMinimumSize = 16;
46// There is a 4 px gap between the icon and the title text.
47const int kIconTitleSpacing = 4;
48// There is a 5 px gap between the title text and the close button.
49const int kTitleCloseButtonSpacing = 5;
50// There is a 4 px gap between the close button and the frame border.
51const int kCloseButtonFrameBorderSpacing = 4;
52}
53
54///////////////////////////////////////////////////////////////////////////////
55// AppPanelBrowserFrameView, public:
56
57AppPanelBrowserFrameView::AppPanelBrowserFrameView(BrowserFrame* frame,
58                                                   BrowserView* browser_view)
59    : BrowserNonClientFrameView(),
60      ALLOW_THIS_IN_INITIALIZER_LIST(
61          close_button_(new views::ImageButton(this))),
62      window_icon_(NULL),
63      frame_(frame),
64      browser_view_(browser_view) {
65  DCHECK(browser_view->ShouldShowWindowIcon());
66  DCHECK(browser_view->ShouldShowWindowTitle());
67
68  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
69  close_button_->SetImage(views::CustomButton::BS_NORMAL,
70                          rb.GetBitmapNamed(IDR_CLOSE_BAR));
71  close_button_->SetImage(views::CustomButton::BS_HOT,
72                          rb.GetBitmapNamed(IDR_CLOSE_BAR_H));
73  close_button_->SetImage(views::CustomButton::BS_PUSHED,
74                          rb.GetBitmapNamed(IDR_CLOSE_BAR_P));
75  close_button_->SetAccessibleName(
76      l10n_util::GetStringUTF16(IDS_ACCNAME_CLOSE));
77  AddChildView(close_button_);
78
79  window_icon_ = new TabIconView(this);
80  window_icon_->set_is_light(true);
81  AddChildView(window_icon_);
82  window_icon_->Update();
83}
84
85AppPanelBrowserFrameView::~AppPanelBrowserFrameView() {
86}
87
88///////////////////////////////////////////////////////////////////////////////
89// AppPanelBrowserFrameView, BrowserNonClientFrameView implementation:
90
91gfx::Rect AppPanelBrowserFrameView::GetBoundsForTabStrip(
92    views::View* tabstrip) const {
93  // App panels never show a tab strip.
94  NOTREACHED();
95  return gfx::Rect();
96}
97
98int AppPanelBrowserFrameView::GetHorizontalTabStripVerticalOffset(
99    bool restored) const {
100  // App panels are not themed and don't need this.
101  return 0;
102}
103
104void AppPanelBrowserFrameView::UpdateThrobber(bool running) {
105  window_icon_->Update();
106}
107
108gfx::Size AppPanelBrowserFrameView::GetMinimumSize() {
109  gfx::Size min_size(browser_view_->GetMinimumSize());
110  int border_thickness = NonClientBorderThickness();
111  min_size.Enlarge(2 * border_thickness,
112                   NonClientTopBorderHeight() + border_thickness);
113
114  min_size.set_width(std::max(min_size.width(),
115      (2 * FrameBorderThickness()) + kIconLeftSpacing + IconSize() +
116      kTitleCloseButtonSpacing + kCloseButtonFrameBorderSpacing));
117  return min_size;
118}
119
120///////////////////////////////////////////////////////////////////////////////
121// AppPanelBrowserFrameView, views::NonClientFrameView implementation:
122
123gfx::Rect AppPanelBrowserFrameView::GetBoundsForClientView() const {
124  return client_view_bounds_;
125}
126
127bool AppPanelBrowserFrameView::AlwaysUseCustomFrame() const {
128  return true;
129}
130
131bool AppPanelBrowserFrameView::AlwaysUseNativeFrame() const {
132  return frame_->AlwaysUseNativeFrame();
133}
134
135gfx::Rect AppPanelBrowserFrameView::GetWindowBoundsForClientBounds(
136    const gfx::Rect& client_bounds) const {
137  int top_height = NonClientTopBorderHeight();
138  int border_thickness = NonClientBorderThickness();
139  return gfx::Rect(std::max(0, client_bounds.x() - border_thickness),
140                   std::max(0, client_bounds.y() - top_height),
141                   client_bounds.width() + (2 * border_thickness),
142                   client_bounds.height() + top_height + border_thickness);
143}
144
145int AppPanelBrowserFrameView::NonClientHitTest(const gfx::Point& point) {
146  if (!bounds().Contains(point))
147    return HTNOWHERE;
148
149  int frame_component =
150      frame_->GetWindow()->client_view()->NonClientHitTest(point);
151
152  // See if we're in the sysmenu region.  (We check the ClientView first to be
153  // consistent with OpaqueBrowserFrameView; it's not really necessary here.)
154  gfx::Rect sysmenu_rect(IconBounds());
155  // In maximized mode we extend the rect to the screen corner to take advantage
156  // of Fitts' Law.
157  if (frame_->GetWindow()->IsMaximized())
158    sysmenu_rect.SetRect(0, 0, sysmenu_rect.right(), sysmenu_rect.bottom());
159  sysmenu_rect.set_x(GetMirroredXForRect(sysmenu_rect));
160  if (sysmenu_rect.Contains(point))
161    return (frame_component == HTCLIENT) ? HTCLIENT : HTSYSMENU;
162
163  if (frame_component != HTNOWHERE)
164    return frame_component;
165
166  // Then see if the point is within any of the window controls.
167  if (close_button_->IsVisible() &&
168      close_button_->GetMirroredBounds().Contains(point))
169    return HTCLOSE;
170
171  int window_component = GetHTComponentForFrame(point,
172      NonClientBorderThickness(), NonClientBorderThickness(),
173      kResizeAreaCornerSize, kResizeAreaCornerSize,
174      frame_->GetWindow()->window_delegate()->CanResize());
175  // Fall back to the caption if no other component matches.
176  return (window_component == HTNOWHERE) ? HTCAPTION : window_component;
177}
178
179void AppPanelBrowserFrameView::GetWindowMask(const gfx::Size& size,
180                                             gfx::Path* window_mask) {
181  DCHECK(window_mask);
182
183  if (frame_->GetWindow()->IsMaximized())
184    return;
185
186  // Redefine the window visible region for the new size.
187  window_mask->moveTo(0, 3);
188  window_mask->lineTo(1, 2);
189  window_mask->lineTo(1, 1);
190  window_mask->lineTo(2, 1);
191  window_mask->lineTo(3, 0);
192
193  window_mask->lineTo(SkIntToScalar(size.width() - 3), 0);
194  window_mask->lineTo(SkIntToScalar(size.width() - 2), 1);
195  window_mask->lineTo(SkIntToScalar(size.width() - 1), 1);
196  window_mask->lineTo(SkIntToScalar(size.width() - 1), 2);
197  window_mask->lineTo(SkIntToScalar(size.width()), 3);
198
199  window_mask->lineTo(SkIntToScalar(size.width()),
200                      SkIntToScalar(size.height()));
201  window_mask->lineTo(0, SkIntToScalar(size.height()));
202  window_mask->close();
203}
204
205void AppPanelBrowserFrameView::EnableClose(bool enable) {
206  close_button_->SetEnabled(enable);
207}
208
209void AppPanelBrowserFrameView::ResetWindowControls() {
210  // The close button isn't affected by this constraint.
211}
212
213void AppPanelBrowserFrameView::UpdateWindowIcon() {
214  window_icon_->SchedulePaint();
215}
216
217
218///////////////////////////////////////////////////////////////////////////////
219// AppPanelBrowserFrameView, views::View overrides:
220
221void AppPanelBrowserFrameView::OnPaint(gfx::Canvas* canvas) {
222  views::Window* window = frame_->GetWindow();
223  if (window->IsMaximized())
224    PaintMaximizedFrameBorder(canvas);
225  else
226    PaintRestoredFrameBorder(canvas);
227  PaintTitleBar(canvas);
228  if (!window->IsMaximized())
229    PaintRestoredClientEdge(canvas);
230}
231
232void AppPanelBrowserFrameView::Layout() {
233  LayoutWindowControls();
234  LayoutTitleBar();
235  client_view_bounds_ = CalculateClientAreaBounds(width(), height());
236}
237
238///////////////////////////////////////////////////////////////////////////////
239// AppPanelBrowserFrameView, views::ButtonListener implementation:
240
241void AppPanelBrowserFrameView::ButtonPressed(views::Button* sender,
242                                             const views::Event& event) {
243  if (sender == close_button_)
244    frame_->GetWindow()->CloseWindow();
245}
246
247///////////////////////////////////////////////////////////////////////////////
248// AppPanelBrowserFrameView, TabIconView::TabContentsProvider implementation:
249
250bool AppPanelBrowserFrameView::ShouldTabIconViewAnimate() const {
251  // This function is queried during the creation of the window as the
252  // TabIconView we host is initialized, so we need to NULL check the selected
253  // TabContents because in this condition there is not yet a selected tab.
254  TabContents* current_tab = browser_view_->GetSelectedTabContents();
255  return current_tab ? current_tab->is_loading() : false;
256}
257
258SkBitmap AppPanelBrowserFrameView::GetFaviconForTabIconView() {
259  return frame_->GetWindow()->window_delegate()->GetWindowIcon();
260}
261
262///////////////////////////////////////////////////////////////////////////////
263// AppPanelBrowserFrameView, private:
264
265int AppPanelBrowserFrameView::FrameBorderThickness() const {
266  return frame_->GetWindow()->IsMaximized() ? 0 : kFrameBorderThickness;
267}
268
269int AppPanelBrowserFrameView::NonClientBorderThickness() const {
270  return FrameBorderThickness() +
271      (frame_->GetWindow()->IsMaximized() ? 0 : kClientEdgeThickness);
272}
273
274int AppPanelBrowserFrameView::NonClientTopBorderHeight() const {
275  return std::max(FrameBorderThickness() + IconSize(),
276                  FrameBorderThickness() + kCaptionButtonHeightWithPadding) +
277      TitlebarBottomThickness();
278}
279
280int AppPanelBrowserFrameView::TitlebarBottomThickness() const {
281  return kTitlebarTopAndBottomEdgeThickness +
282      (frame_->GetWindow()->IsMaximized() ? 0 : kClientEdgeThickness);
283}
284
285int AppPanelBrowserFrameView::IconSize() const {
286#if defined(OS_WIN)
287  // This metric scales up if either the titlebar height or the titlebar font
288  // size are increased.
289  return GetSystemMetrics(SM_CYSMICON);
290#else
291  return std::max(BrowserFrame::GetTitleFont().height(), kIconMinimumSize);
292#endif
293}
294
295gfx::Rect AppPanelBrowserFrameView::IconBounds() const {
296  int size = IconSize();
297  int frame_thickness = FrameBorderThickness();
298  // Our frame border has a different "3D look" than Windows'.  Theirs has a
299  // more complex gradient on the top that they push their icon/title below;
300  // then the maximized window cuts this off and the icon/title are centered
301  // in the remaining space.  Because the apparent shape of our border is
302  // simpler, using the same positioning makes things look slightly uncentered
303  // with restored windows, so when the window is restored, instead of
304  // calculating the remaining space from below the frame border, we calculate
305  // from below the top border-plus-padding.
306  int unavailable_px_at_top = frame_->GetWindow()->IsMaximized() ?
307      frame_thickness : kTitlebarTopAndBottomEdgeThickness;
308  // When the icon is shorter than the minimum space we reserve for the caption
309  // button, we vertically center it.  We want to bias rounding to put extra
310  // space above the icon, since the 3D edge (+ client edge, for restored
311  // windows) below looks (to the eye) more like additional space than does the
312  // border + padding (or nothing at all, for maximized windows) above; hence
313  // the +1.
314  int y = unavailable_px_at_top + (NonClientTopBorderHeight() -
315      unavailable_px_at_top - size - TitlebarBottomThickness() + 1) / 2;
316  return gfx::Rect(frame_thickness + kIconLeftSpacing, y, size, size);
317}
318
319void AppPanelBrowserFrameView::PaintRestoredFrameBorder(gfx::Canvas* canvas) {
320  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
321
322  SkBitmap* top_left_corner = rb.GetBitmapNamed(IDR_WINDOW_TOP_LEFT_CORNER);
323  SkBitmap* top_right_corner =
324      rb.GetBitmapNamed(IDR_WINDOW_TOP_RIGHT_CORNER);
325  SkBitmap* top_edge = rb.GetBitmapNamed(IDR_WINDOW_TOP_CENTER);
326  SkBitmap* right_edge = rb.GetBitmapNamed(IDR_WINDOW_RIGHT_SIDE);
327  SkBitmap* left_edge = rb.GetBitmapNamed(IDR_WINDOW_LEFT_SIDE);
328  SkBitmap* bottom_left_corner =
329      rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_LEFT_CORNER);
330  SkBitmap* bottom_right_corner =
331      rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_RIGHT_CORNER);
332  SkBitmap* bottom_edge = rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_CENTER);
333
334  // Window frame mode and color.
335  SkBitmap* theme_frame;
336  SkColor frame_color;
337  if (ShouldPaintAsActive()) {
338    theme_frame = rb.GetBitmapNamed(IDR_FRAME_APP_PANEL);
339    frame_color = ResourceBundle::frame_color_app_panel;
340  } else {
341    theme_frame = rb.GetBitmapNamed(IDR_FRAME_APP_PANEL);  // TODO
342    frame_color = ResourceBundle::frame_color_app_panel_inactive;
343  }
344
345  // Fill with the frame color first so we have a constant background for
346  // areas not covered by the theme image.
347  canvas->FillRectInt(frame_color, 0, 0, width(), theme_frame->height());
348  // Now fill down the sides.
349  canvas->FillRectInt(frame_color, 0, theme_frame->height(), left_edge->width(),
350                      height() - theme_frame->height());
351  canvas->FillRectInt(frame_color, width() - right_edge->width(),
352                      theme_frame->height(), right_edge->width(),
353                      height() - theme_frame->height());
354  // Now fill the bottom area.
355  canvas->FillRectInt(frame_color, left_edge->width(),
356                      height() - bottom_edge->height(),
357                      width() - left_edge->width() - right_edge->width(),
358                      bottom_edge->height());
359
360  // Draw the theme frame.
361  canvas->TileImageInt(*theme_frame, 0, 0, width(), theme_frame->height());
362
363  // Top.
364  canvas->DrawBitmapInt(*top_left_corner, 0, 0);
365  canvas->TileImageInt(*top_edge, top_left_corner->width(), 0,
366                       width() - top_right_corner->width(), top_edge->height());
367  canvas->DrawBitmapInt(*top_right_corner,
368                        width() - top_right_corner->width(), 0);
369
370  // Right.
371  canvas->TileImageInt(*right_edge, width() - right_edge->width(),
372      top_right_corner->height(), right_edge->width(),
373      height() - top_right_corner->height() - bottom_right_corner->height());
374
375  // Bottom.
376  canvas->DrawBitmapInt(*bottom_right_corner,
377                        width() - bottom_right_corner->width(),
378                        height() - bottom_right_corner->height());
379  canvas->TileImageInt(*bottom_edge, bottom_left_corner->width(),
380      height() - bottom_edge->height(),
381      width() - bottom_left_corner->width() - bottom_right_corner->width(),
382      bottom_edge->height());
383  canvas->DrawBitmapInt(*bottom_left_corner, 0,
384                        height() - bottom_left_corner->height());
385
386  // Left.
387  canvas->TileImageInt(*left_edge, 0, top_left_corner->height(),
388      left_edge->width(),
389      height() - top_left_corner->height() - bottom_left_corner->height());
390}
391
392void AppPanelBrowserFrameView::PaintMaximizedFrameBorder(gfx::Canvas* canvas) {
393  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
394
395  SkBitmap* frame_image = rb.GetBitmapNamed(IDR_FRAME_APP_PANEL);
396  canvas->TileImageInt(*frame_image, 0, FrameBorderThickness(), width(),
397                       frame_image->height());
398
399  // The bottom of the titlebar actually comes from the top of the Client Edge
400  // graphic, with the actual client edge clipped off the bottom.
401  SkBitmap* titlebar_bottom = rb.GetBitmapNamed(IDR_APP_TOP_CENTER);
402  int edge_height = titlebar_bottom->height() - kClientEdgeThickness;
403  canvas->TileImageInt(*titlebar_bottom, 0,
404                       frame_->GetWindow()->client_view()->y() - edge_height,
405                       width(), edge_height);
406}
407
408void AppPanelBrowserFrameView::PaintTitleBar(gfx::Canvas* canvas) {
409  // The window icon is painted by the TabIconView.
410  views::WindowDelegate* d = frame_->GetWindow()->window_delegate();
411  canvas->DrawStringInt(d->GetWindowTitle(), BrowserFrame::GetTitleFont(),
412      SK_ColorBLACK, GetMirroredXForRect(title_bounds_), title_bounds_.y(),
413      title_bounds_.width(), title_bounds_.height());
414}
415
416void AppPanelBrowserFrameView::PaintRestoredClientEdge(gfx::Canvas* canvas) {
417  gfx::Rect client_area_bounds = CalculateClientAreaBounds(width(), height());
418  int client_area_top = client_area_bounds.y();
419
420  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
421  SkBitmap* top_left = rb.GetBitmapNamed(IDR_APP_TOP_LEFT);
422  SkBitmap* top = rb.GetBitmapNamed(IDR_APP_TOP_CENTER);
423  SkBitmap* top_right = rb.GetBitmapNamed(IDR_APP_TOP_RIGHT);
424  SkBitmap* right = rb.GetBitmapNamed(IDR_CONTENT_RIGHT_SIDE);
425  SkBitmap* bottom_right =
426      rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_RIGHT_CORNER);
427  SkBitmap* bottom = rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_CENTER);
428  SkBitmap* bottom_left =
429      rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_LEFT_CORNER);
430  SkBitmap* left = rb.GetBitmapNamed(IDR_CONTENT_LEFT_SIDE);
431
432  // Top.
433  int top_edge_y = client_area_top - top->height();
434  canvas->DrawBitmapInt(*top_left, client_area_bounds.x() - top_left->width(),
435                        top_edge_y);
436  canvas->TileImageInt(*top, client_area_bounds.x(), top_edge_y,
437                       client_area_bounds.width(), top->height());
438  canvas->DrawBitmapInt(*top_right, client_area_bounds.right(), top_edge_y);
439
440  // Right.
441  int client_area_bottom =
442      std::max(client_area_top, client_area_bounds.bottom());
443  int client_area_height = client_area_bottom - client_area_top;
444  canvas->TileImageInt(*right, client_area_bounds.right(), client_area_top,
445                       right->width(), client_area_height);
446
447  // Bottom.
448  canvas->DrawBitmapInt(*bottom_right, client_area_bounds.right(),
449                        client_area_bottom);
450  canvas->TileImageInt(*bottom, client_area_bounds.x(), client_area_bottom,
451                       client_area_bounds.width(), bottom_right->height());
452  canvas->DrawBitmapInt(*bottom_left,
453      client_area_bounds.x() - bottom_left->width(), client_area_bottom);
454
455  // Left.
456  canvas->TileImageInt(*left, client_area_bounds.x() - left->width(),
457      client_area_top, left->width(), client_area_height);
458
459  // Draw the toolbar color to fill in the edges.
460  canvas->DrawRectInt(ResourceBundle::toolbar_color,
461      client_area_bounds.x() - kClientEdgeThickness,
462      client_area_top - kClientEdgeThickness,
463      client_area_bounds.width() + kClientEdgeThickness,
464      client_area_bottom - client_area_top + kClientEdgeThickness);
465}
466
467void AppPanelBrowserFrameView::LayoutWindowControls() {
468  close_button_->SetImageAlignment(views::ImageButton::ALIGN_LEFT,
469                                   views::ImageButton::ALIGN_BOTTOM);
470  bool is_maximized = frame_->GetWindow()->IsMaximized();
471  // There should always be the same number of non-border pixels visible to the
472  // side of the close button.  In maximized mode we extend the button to the
473  // screen corner to obey Fitts' Law.
474  int right_extra_width = is_maximized ? kCloseButtonFrameBorderSpacing : 0;
475  gfx::Size close_button_size = close_button_->GetPreferredSize();
476  int close_button_y =
477      (NonClientTopBorderHeight() - close_button_size.height()) / 2;
478  int top_extra_height = is_maximized ? close_button_y : 0;
479  close_button_->SetBounds(width() - FrameBorderThickness() -
480      kCloseButtonFrameBorderSpacing - close_button_size.width(),
481      close_button_y - top_extra_height,
482      close_button_size.width() + right_extra_width,
483      close_button_size.height() + top_extra_height);
484}
485
486void AppPanelBrowserFrameView::LayoutTitleBar() {
487  // Size the icon first; the window title is based on the icon position.
488  gfx::Rect icon_bounds(IconBounds());
489  window_icon_->SetBoundsRect(icon_bounds);
490
491  // Size the title.
492  int title_x = icon_bounds.right() + kIconTitleSpacing;
493  int title_height = BrowserFrame::GetTitleFont().GetHeight();
494  // We bias the title position so that when the difference between the icon
495  // and title heights is odd, the extra pixel of the title is above the
496  // vertical midline rather than below.  This compensates for how the icon is
497  // already biased downwards (see IconBounds()) and helps prevent descenders
498  // on the title from overlapping the 3D edge at the bottom of the titlebar.
499  title_bounds_.SetRect(title_x,
500      icon_bounds.y() + ((icon_bounds.height() - title_height - 1) / 2),
501      std::max(0, close_button_->x() - kTitleCloseButtonSpacing - title_x),
502      title_height);
503}
504
505gfx::Rect AppPanelBrowserFrameView::CalculateClientAreaBounds(int width,
506    int height) const {
507  int top_height = NonClientTopBorderHeight();
508  int border_thickness = NonClientBorderThickness();
509  return gfx::Rect(border_thickness, top_height,
510                   std::max(0, width - (2 * border_thickness)),
511                   std::max(0, height - top_height - border_thickness));
512}
513