app_panel_browser_frame_view.cc revision 3f50c38dc070f4bb515c1b64450dae14f316474e 
1// Copyright (c) 2010 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/views/frame/app_panel_browser_frame_view.h"
6
7#include "app/l10n_util.h"
8#include "app/resource_bundle.h"
9#include "base/compiler_specific.h"
10#include "base/utf_string_conversions.h"
11#include "chrome/browser/tab_contents/tab_contents.h"
12#include "chrome/browser/views/frame/browser_frame.h"
13#include "chrome/browser/views/frame/browser_view.h"
14#include "gfx/canvas.h"
15#include "gfx/font.h"
16#include "gfx/path.h"
17#include "grit/app_resources.h"
18#include "grit/chromium_strings.h"
19#include "grit/generated_resources.h"
20#include "grit/theme_resources.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      UTF16ToWide(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    BaseTabStrip* 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()->GetClientView()->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(MirroredLeftPointForRect(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_->GetBounds(APPLY_MIRRORING_TRANSFORMATION).Contains(point))
169    return HTCLOSE;
170
171  int window_component = GetHTComponentForFrame(point,
172      NonClientBorderThickness(), NonClientBorderThickness(),
173      kResizeAreaCornerSize, kResizeAreaCornerSize,
174      frame_->GetWindow()->GetDelegate()->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
213///////////////////////////////////////////////////////////////////////////////
214// AppPanelBrowserFrameView, views::View overrides:
215
216void AppPanelBrowserFrameView::Paint(gfx::Canvas* canvas) {
217  views::Window* window = frame_->GetWindow();
218  if (window->IsMaximized())
219    PaintMaximizedFrameBorder(canvas);
220  else
221    PaintRestoredFrameBorder(canvas);
222  PaintTitleBar(canvas);
223  if (!window->IsMaximized())
224    PaintRestoredClientEdge(canvas);
225}
226
227void AppPanelBrowserFrameView::Layout() {
228  LayoutWindowControls();
229  LayoutTitleBar();
230  client_view_bounds_ = CalculateClientAreaBounds(width(), height());
231}
232
233///////////////////////////////////////////////////////////////////////////////
234// AppPanelBrowserFrameView, views::ButtonListener implementation:
235
236void AppPanelBrowserFrameView::ButtonPressed(views::Button* sender,
237                                             const views::Event& event) {
238  if (sender == close_button_)
239    frame_->GetWindow()->Close();
240}
241
242///////////////////////////////////////////////////////////////////////////////
243// AppPanelBrowserFrameView, TabIconView::TabContentsProvider implementation:
244
245bool AppPanelBrowserFrameView::ShouldTabIconViewAnimate() const {
246  // This function is queried during the creation of the window as the
247  // TabIconView we host is initialized, so we need to NULL check the selected
248  // TabContents because in this condition there is not yet a selected tab.
249  TabContents* current_tab = browser_view_->GetSelectedTabContents();
250  return current_tab ? current_tab->is_loading() : false;
251}
252
253SkBitmap AppPanelBrowserFrameView::GetFavIconForTabIconView() {
254  return frame_->GetWindow()->GetDelegate()->GetWindowIcon();
255}
256
257///////////////////////////////////////////////////////////////////////////////
258// AppPanelBrowserFrameView, private:
259
260int AppPanelBrowserFrameView::FrameBorderThickness() const {
261  return frame_->GetWindow()->IsMaximized() ? 0 : kFrameBorderThickness;
262}
263
264int AppPanelBrowserFrameView::NonClientBorderThickness() const {
265  return FrameBorderThickness() +
266      (frame_->GetWindow()->IsMaximized() ? 0 : kClientEdgeThickness);
267}
268
269int AppPanelBrowserFrameView::NonClientTopBorderHeight() const {
270  return std::max(FrameBorderThickness() + IconSize(),
271                  FrameBorderThickness() + kCaptionButtonHeightWithPadding) +
272      TitlebarBottomThickness();
273}
274
275int AppPanelBrowserFrameView::TitlebarBottomThickness() const {
276  return kTitlebarTopAndBottomEdgeThickness +
277      (frame_->GetWindow()->IsMaximized() ? 0 : kClientEdgeThickness);
278}
279
280int AppPanelBrowserFrameView::IconSize() const {
281#if defined(OS_WIN)
282  // This metric scales up if either the titlebar height or the titlebar font
283  // size are increased.
284  return GetSystemMetrics(SM_CYSMICON);
285#else
286  return std::max(BrowserFrame::GetTitleFont().height(), kIconMinimumSize);
287#endif
288}
289
290gfx::Rect AppPanelBrowserFrameView::IconBounds() const {
291  int size = IconSize();
292  int frame_thickness = FrameBorderThickness();
293  // Our frame border has a different "3D look" than Windows'.  Theirs has a
294  // more complex gradient on the top that they push their icon/title below;
295  // then the maximized window cuts this off and the icon/title are centered
296  // in the remaining space.  Because the apparent shape of our border is
297  // simpler, using the same positioning makes things look slightly uncentered
298  // with restored windows, so when the window is restored, instead of
299  // calculating the remaining space from below the frame border, we calculate
300  // from below the top border-plus-padding.
301  int unavailable_px_at_top = frame_->GetWindow()->IsMaximized() ?
302      frame_thickness : kTitlebarTopAndBottomEdgeThickness;
303  // When the icon is shorter than the minimum space we reserve for the caption
304  // button, we vertically center it.  We want to bias rounding to put extra
305  // space above the icon, since the 3D edge (+ client edge, for restored
306  // windows) below looks (to the eye) more like additional space than does the
307  // border + padding (or nothing at all, for maximized windows) above; hence
308  // the +1.
309  int y = unavailable_px_at_top + (NonClientTopBorderHeight() -
310      unavailable_px_at_top - size - TitlebarBottomThickness() + 1) / 2;
311  return gfx::Rect(frame_thickness + kIconLeftSpacing, y, size, size);
312}
313
314void AppPanelBrowserFrameView::PaintRestoredFrameBorder(gfx::Canvas* canvas) {
315  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
316
317  SkBitmap* top_left_corner = rb.GetBitmapNamed(IDR_WINDOW_TOP_LEFT_CORNER);
318  SkBitmap* top_right_corner =
319      rb.GetBitmapNamed(IDR_WINDOW_TOP_RIGHT_CORNER);
320  SkBitmap* top_edge = rb.GetBitmapNamed(IDR_WINDOW_TOP_CENTER);
321  SkBitmap* right_edge = rb.GetBitmapNamed(IDR_WINDOW_RIGHT_SIDE);
322  SkBitmap* left_edge = rb.GetBitmapNamed(IDR_WINDOW_LEFT_SIDE);
323  SkBitmap* bottom_left_corner =
324      rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_LEFT_CORNER);
325  SkBitmap* bottom_right_corner =
326      rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_RIGHT_CORNER);
327  SkBitmap* bottom_edge = rb.GetBitmapNamed(IDR_WINDOW_BOTTOM_CENTER);
328
329  // Window frame mode and color.
330  SkBitmap* theme_frame;
331  SkColor frame_color;
332  if (ShouldPaintAsActive()) {
333    theme_frame = rb.GetBitmapNamed(IDR_FRAME_APP_PANEL);
334    frame_color = ResourceBundle::frame_color_app_panel;
335  } else {
336    theme_frame = rb.GetBitmapNamed(IDR_FRAME_APP_PANEL);  // TODO
337    frame_color = ResourceBundle::frame_color_app_panel_inactive;
338  }
339
340  // Fill with the frame color first so we have a constant background for
341  // areas not covered by the theme image.
342  canvas->FillRectInt(frame_color, 0, 0, width(), theme_frame->height());
343  // Now fill down the sides.
344  canvas->FillRectInt(frame_color, 0, theme_frame->height(), left_edge->width(),
345                      height() - theme_frame->height());
346  canvas->FillRectInt(frame_color, width() - right_edge->width(),
347                      theme_frame->height(), right_edge->width(),
348                      height() - theme_frame->height());
349  // Now fill the bottom area.
350  canvas->FillRectInt(frame_color, left_edge->width(),
351                      height() - bottom_edge->height(),
352                      width() - left_edge->width() - right_edge->width(),
353                      bottom_edge->height());
354
355  // Draw the theme frame.
356  canvas->TileImageInt(*theme_frame, 0, 0, width(), theme_frame->height());
357
358  // Top.
359  canvas->DrawBitmapInt(*top_left_corner, 0, 0);
360  canvas->TileImageInt(*top_edge, top_left_corner->width(), 0,
361                       width() - top_right_corner->width(), top_edge->height());
362  canvas->DrawBitmapInt(*top_right_corner,
363                        width() - top_right_corner->width(), 0);
364
365  // Right.
366  canvas->TileImageInt(*right_edge, width() - right_edge->width(),
367      top_right_corner->height(), right_edge->width(),
368      height() - top_right_corner->height() - bottom_right_corner->height());
369
370  // Bottom.
371  canvas->DrawBitmapInt(*bottom_right_corner,
372                        width() - bottom_right_corner->width(),
373                        height() - bottom_right_corner->height());
374  canvas->TileImageInt(*bottom_edge, bottom_left_corner->width(),
375      height() - bottom_edge->height(),
376      width() - bottom_left_corner->width() - bottom_right_corner->width(),
377      bottom_edge->height());
378  canvas->DrawBitmapInt(*bottom_left_corner, 0,
379                        height() - bottom_left_corner->height());
380
381  // Left.
382  canvas->TileImageInt(*left_edge, 0, top_left_corner->height(),
383      left_edge->width(),
384      height() - top_left_corner->height() - bottom_left_corner->height());
385}
386
387void AppPanelBrowserFrameView::PaintMaximizedFrameBorder(gfx::Canvas* canvas) {
388  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
389
390  SkBitmap* frame_image = rb.GetBitmapNamed(IDR_FRAME_APP_PANEL);
391  canvas->TileImageInt(*frame_image, 0, FrameBorderThickness(), width(),
392                       frame_image->height());
393
394  // The bottom of the titlebar actually comes from the top of the Client Edge
395  // graphic, with the actual client edge clipped off the bottom.
396  SkBitmap* titlebar_bottom = rb.GetBitmapNamed(IDR_APP_TOP_CENTER);
397  int edge_height = titlebar_bottom->height() - kClientEdgeThickness;
398  canvas->TileImageInt(*titlebar_bottom, 0,
399                       frame_->GetWindow()->GetClientView()->y() - edge_height,
400                       width(), edge_height);
401}
402
403void AppPanelBrowserFrameView::PaintTitleBar(gfx::Canvas* canvas) {
404  // The window icon is painted by the TabIconView.
405  views::WindowDelegate* d = frame_->GetWindow()->GetDelegate();
406  canvas->DrawStringInt(d->GetWindowTitle(), BrowserFrame::GetTitleFont(),
407      SK_ColorBLACK, MirroredLeftPointForRect(title_bounds_), title_bounds_.y(),
408      title_bounds_.width(), title_bounds_.height());
409}
410
411void AppPanelBrowserFrameView::PaintRestoredClientEdge(gfx::Canvas* canvas) {
412  gfx::Rect client_area_bounds = CalculateClientAreaBounds(width(), height());
413  int client_area_top = client_area_bounds.y();
414
415  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
416  SkBitmap* top_left = rb.GetBitmapNamed(IDR_APP_TOP_LEFT);
417  SkBitmap* top = rb.GetBitmapNamed(IDR_APP_TOP_CENTER);
418  SkBitmap* top_right = rb.GetBitmapNamed(IDR_APP_TOP_RIGHT);
419  SkBitmap* right = rb.GetBitmapNamed(IDR_CONTENT_RIGHT_SIDE);
420  SkBitmap* bottom_right =
421      rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_RIGHT_CORNER);
422  SkBitmap* bottom = rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_CENTER);
423  SkBitmap* bottom_left =
424      rb.GetBitmapNamed(IDR_CONTENT_BOTTOM_LEFT_CORNER);
425  SkBitmap* left = rb.GetBitmapNamed(IDR_CONTENT_LEFT_SIDE);
426
427  // Top.
428  int top_edge_y = client_area_top - top->height();
429  canvas->DrawBitmapInt(*top_left, client_area_bounds.x() - top_left->width(),
430                        top_edge_y);
431  canvas->TileImageInt(*top, client_area_bounds.x(), top_edge_y,
432                       client_area_bounds.width(), top->height());
433  canvas->DrawBitmapInt(*top_right, client_area_bounds.right(), top_edge_y);
434
435  // Right.
436  int client_area_bottom =
437      std::max(client_area_top, client_area_bounds.bottom());
438  int client_area_height = client_area_bottom - client_area_top;
439  canvas->TileImageInt(*right, client_area_bounds.right(), client_area_top,
440                       right->width(), client_area_height);
441
442  // Bottom.
443  canvas->DrawBitmapInt(*bottom_right, client_area_bounds.right(),
444                        client_area_bottom);
445  canvas->TileImageInt(*bottom, client_area_bounds.x(), client_area_bottom,
446                       client_area_bounds.width(), bottom_right->height());
447  canvas->DrawBitmapInt(*bottom_left,
448      client_area_bounds.x() - bottom_left->width(), client_area_bottom);
449
450  // Left.
451  canvas->TileImageInt(*left, client_area_bounds.x() - left->width(),
452      client_area_top, left->width(), client_area_height);
453
454  // Draw the toolbar color to fill in the edges.
455  canvas->DrawRectInt(ResourceBundle::toolbar_color,
456      client_area_bounds.x() - kClientEdgeThickness,
457      client_area_top - kClientEdgeThickness,
458      client_area_bounds.width() + kClientEdgeThickness,
459      client_area_bottom - client_area_top + kClientEdgeThickness);
460}
461
462void AppPanelBrowserFrameView::LayoutWindowControls() {
463  close_button_->SetImageAlignment(views::ImageButton::ALIGN_LEFT,
464                                   views::ImageButton::ALIGN_BOTTOM);
465  bool is_maximized = frame_->GetWindow()->IsMaximized();
466  // There should always be the same number of non-border pixels visible to the
467  // side of the close button.  In maximized mode we extend the button to the
468  // screen corner to obey Fitts' Law.
469  int right_extra_width = is_maximized ? kCloseButtonFrameBorderSpacing : 0;
470  gfx::Size close_button_size = close_button_->GetPreferredSize();
471  int close_button_y =
472      (NonClientTopBorderHeight() - close_button_size.height()) / 2;
473  int top_extra_height = is_maximized ? close_button_y : 0;
474  close_button_->SetBounds(width() - FrameBorderThickness() -
475      kCloseButtonFrameBorderSpacing - close_button_size.width(),
476      close_button_y - top_extra_height,
477      close_button_size.width() + right_extra_width,
478      close_button_size.height() + top_extra_height);
479}
480
481void AppPanelBrowserFrameView::LayoutTitleBar() {
482  // Size the icon first; the window title is based on the icon position.
483  gfx::Rect icon_bounds(IconBounds());
484  window_icon_->SetBounds(icon_bounds);
485
486  // Size the title.
487  int title_x = icon_bounds.right() + kIconTitleSpacing;
488  int title_height = BrowserFrame::GetTitleFont().GetHeight();
489  // We bias the title position so that when the difference between the icon
490  // and title heights is odd, the extra pixel of the title is above the
491  // vertical midline rather than below.  This compensates for how the icon is
492  // already biased downwards (see IconBounds()) and helps prevent descenders
493  // on the title from overlapping the 3D edge at the bottom of the titlebar.
494  title_bounds_.SetRect(title_x,
495      icon_bounds.y() + ((icon_bounds.height() - title_height - 1) / 2),
496      std::max(0, close_button_->x() - kTitleCloseButtonSpacing - title_x),
497      title_height);
498}
499
500gfx::Rect AppPanelBrowserFrameView::CalculateClientAreaBounds(int width,
501    int height) const {
502  int top_height = NonClientTopBorderHeight();
503  int border_thickness = NonClientBorderThickness();
504  return gfx::Rect(border_thickness, top_height,
505                   std::max(0, width - (2 * border_thickness)),
506                   std::max(0, height - top_height - border_thickness));
507}
508