apps/ui/views/app_window_frame_view.cc

   1 // Copyright 2014 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 "apps/ui/views/app_window_frame_view.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "extensions/browser/app_window/native_app_window.h"
   9 #include "extensions/common/draggable_region.h"
  10 #include "grit/theme_resources.h"
  11 #include "third_party/skia/include/core/SkPaint.h"
  12 #include "third_party/skia/include/core/SkRegion.h"
  13 #include "ui/base/hit_test.h"
  14 #include "ui/base/l10n/l10n_util.h"
  15 #include "ui/base/resource/resource_bundle.h"
  16 #include "ui/gfx/canvas.h"
  17 #include "ui/gfx/color_utils.h"
  18 #include "ui/gfx/image/image.h"
  19 #include "ui/gfx/path.h"
  20 #include "ui/strings/grit/ui_strings.h"  // Accessibility names
  21 #include "ui/views/controls/button/image_button.h"
  22 #include "ui/views/layout/grid_layout.h"
  23 #include "ui/views/views_delegate.h"
  24 #include "ui/views/widget/widget.h"
  25 #include "ui/views/widget/widget_delegate.h"
  26
  27 namespace {
  28
  29 const int kDefaultResizeInsideBoundsSize = 5;
  30 const int kDefaultResizeAreaCornerSize = 16;
  31 const int kCaptionHeight = 25;
  32
  33 }  // namespace
  34
  35 namespace apps {
  36
  37 const char AppWindowFrameView::kViewClassName[] =
  38     "browser/ui/views/extensions/AppWindowFrameView";
  39
  40 AppWindowFrameView::AppWindowFrameView(views::Widget* widget,
  41                                        extensions::NativeAppWindow* window,
  42                                        bool draw_frame,
  43                                        const SkColor& active_frame_color,
  44                                        const SkColor& inactive_frame_color)
  45     : widget_(widget),
  46       window_(window),
  47       draw_frame_(draw_frame),
  48       active_frame_color_(active_frame_color),
  49       inactive_frame_color_(inactive_frame_color),
  50       close_button_(NULL),
  51       maximize_button_(NULL),
  52       restore_button_(NULL),
  53       minimize_button_(NULL),
  54       resize_inside_bounds_size_(kDefaultResizeInsideBoundsSize),
  55       resize_outside_bounds_size_(0),
  56       resize_area_corner_size_(kDefaultResizeAreaCornerSize) {
  57 }
  58
  59 AppWindowFrameView::~AppWindowFrameView() {}
  60
  61 void AppWindowFrameView::Init() {
  62   if (draw_frame_) {
  63     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  64     close_button_ = new views::ImageButton(this);
  65     close_button_->SetImage(
  66         views::CustomButton::STATE_NORMAL,
  67         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE).ToImageSkia());
  68     close_button_->SetImage(
  69         views::CustomButton::STATE_HOVERED,
  70         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE_H).ToImageSkia());
  71     close_button_->SetImage(
  72         views::CustomButton::STATE_PRESSED,
  73         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE_P).ToImageSkia());
  74     close_button_->SetAccessibleName(
  75         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_CLOSE));
  76     AddChildView(close_button_);
  77     // STATE_NORMAL images are set in SetButtonImagesForFrame, not here.
  78     maximize_button_ = new views::ImageButton(this);
  79     maximize_button_->SetImage(
  80         views::CustomButton::STATE_HOVERED,
  81         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_H).ToImageSkia());
  82     maximize_button_->SetImage(
  83         views::CustomButton::STATE_PRESSED,
  84         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_P).ToImageSkia());
  85     maximize_button_->SetImage(
  86         views::CustomButton::STATE_DISABLED,
  87         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_D).ToImageSkia());
  88     maximize_button_->SetAccessibleName(
  89         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_MAXIMIZE));
  90     AddChildView(maximize_button_);
  91     restore_button_ = new views::ImageButton(this);
  92     restore_button_->SetImage(
  93         views::CustomButton::STATE_HOVERED,
  94         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE_H).ToImageSkia());
  95     restore_button_->SetImage(
  96         views::CustomButton::STATE_PRESSED,
  97         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE_P).ToImageSkia());
  98     restore_button_->SetAccessibleName(
  99         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_RESTORE));
 100     AddChildView(restore_button_);
 101     minimize_button_ = new views::ImageButton(this);
 102     minimize_button_->SetImage(
 103         views::CustomButton::STATE_HOVERED,
 104         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE_H).ToImageSkia());
 105     minimize_button_->SetImage(
 106         views::CustomButton::STATE_PRESSED,
 107         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE_P).ToImageSkia());
 108     minimize_button_->SetAccessibleName(
 109         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_MINIMIZE));
 110     AddChildView(minimize_button_);
 111
 112     SetButtonImagesForFrame();
 113   }
 114 }
 115
 116 void AppWindowFrameView::SetResizeSizes(int resize_inside_bounds_size,
 117                                         int resize_outside_bounds_size,
 118                                         int resize_area_corner_size) {
 119   resize_inside_bounds_size_ = resize_inside_bounds_size;
 120   resize_outside_bounds_size_ = resize_outside_bounds_size;
 121   resize_area_corner_size_ = resize_area_corner_size;
 122 }
 123
 124 // views::NonClientFrameView implementation.
 125
 126 gfx::Rect AppWindowFrameView::GetBoundsForClientView() const {
 127   if (!draw_frame_ || widget_->IsFullscreen())
 128     return bounds();
 129   return gfx::Rect(
 130       0, kCaptionHeight, width(), std::max(0, height() - kCaptionHeight));
 131 }
 132
 133 gfx::Rect AppWindowFrameView::GetWindowBoundsForClientBounds(
 134     const gfx::Rect& client_bounds) const {
 135   gfx::Rect window_bounds = client_bounds;
 136 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
 137   // Get the difference between the widget's client area bounds and window
 138   // bounds, and grow |window_bounds| by that amount.
 139   gfx::Insets native_frame_insets =
 140       widget_->GetClientAreaBoundsInScreen().InsetsFrom(
 141           widget_->GetWindowBoundsInScreen());
 142   window_bounds.Inset(native_frame_insets);
 143 #endif
 144   if (!draw_frame_) {
 145     // Enforce minimum size (1, 1) in case that client_bounds is passed with
 146     // empty size. This could occur when the frameless window is being
 147     // initialized.
 148     if (window_bounds.IsEmpty()) {
 149       window_bounds.set_width(1);
 150       window_bounds.set_height(1);
 151     }
 152     return window_bounds;
 153   }
 154
 155   int closeButtonOffsetX = (kCaptionHeight - close_button_->height()) / 2;
 156   int header_width = close_button_->width() + closeButtonOffsetX * 2;
 157   return gfx::Rect(window_bounds.x(),
 158                    window_bounds.y() - kCaptionHeight,
 159                    std::max(header_width, window_bounds.width()),
 160                    window_bounds.height() + kCaptionHeight);
 161 }
 162
 163 int AppWindowFrameView::NonClientHitTest(const gfx::Point& point) {
 164   if (widget_->IsFullscreen())
 165     return HTCLIENT;
 166
 167   gfx::Rect expanded_bounds = bounds();
 168   if (resize_outside_bounds_size_) {
 169     expanded_bounds.Inset(gfx::Insets(-resize_outside_bounds_size_,
 170                                       -resize_outside_bounds_size_,
 171                                       -resize_outside_bounds_size_,
 172                                       -resize_outside_bounds_size_));
 173   }
 174   // Points outside the (possibly expanded) bounds can be discarded.
 175   if (!expanded_bounds.Contains(point))
 176     return HTNOWHERE;
 177
 178   // Check the frame first, as we allow a small area overlapping the contents
 179   // to be used for resize handles.
 180   bool can_ever_resize = widget_->widget_delegate()
 181                              ? widget_->widget_delegate()->CanResize()
 182                              : false;
 183   // Don't allow overlapping resize handles when the window is maximized or
 184   // fullscreen, as it can't be resized in those states.
 185   int resize_border = (widget_->IsMaximized() || widget_->IsFullscreen())
 186                           ? 0
 187                           : resize_inside_bounds_size_;
 188   int frame_component = GetHTComponentForFrame(point,
 189                                                resize_border,
 190                                                resize_border,
 191                                                resize_area_corner_size_,
 192                                                resize_area_corner_size_,
 193                                                can_ever_resize);
 194   if (frame_component != HTNOWHERE)
 195     return frame_component;
 196
 197   // Check for possible draggable region in the client area for the frameless
 198   // window.
 199   SkRegion* draggable_region = window_->GetDraggableRegion();
 200   if (draggable_region && draggable_region->contains(point.x(), point.y()))
 201     return HTCAPTION;
 202
 203   int client_component = widget_->client_view()->NonClientHitTest(point);
 204   if (client_component != HTNOWHERE)
 205     return client_component;
 206
 207   // Then see if the point is within any of the window controls.
 208   if (close_button_ && close_button_->visible() &&
 209       close_button_->GetMirroredBounds().Contains(point)) {
 210     return HTCLOSE;
 211   }
 212   if ((maximize_button_ && maximize_button_->visible() &&
 213        maximize_button_->GetMirroredBounds().Contains(point)) ||
 214       (restore_button_ && restore_button_->visible() &&
 215        restore_button_->GetMirroredBounds().Contains(point))) {
 216     return HTMAXBUTTON;
 217   }
 218   if (minimize_button_ && minimize_button_->visible() &&
 219       minimize_button_->GetMirroredBounds().Contains(point)) {
 220     return HTMINBUTTON;
 221   }
 222
 223   // Caption is a safe default.
 224   return HTCAPTION;
 225 }
 226
 227 void AppWindowFrameView::GetWindowMask(const gfx::Size& size,
 228                                        gfx::Path* window_mask) {
 229   // We got nothing to say about no window mask.
 230 }
 231
 232 gfx::Size AppWindowFrameView::GetPreferredSize() const {
 233   gfx::Size pref = widget_->client_view()->GetPreferredSize();
 234   gfx::Rect bounds(0, 0, pref.width(), pref.height());
 235   return widget_->non_client_view()
 236       ->GetWindowBoundsForClientBounds(bounds)
 237       .size();
 238 }
 239
 240 void AppWindowFrameView::Layout() {
 241   if (!draw_frame_)
 242     return;
 243   gfx::Size close_size = close_button_->GetPreferredSize();
 244   const int kButtonOffsetY = 0;
 245   const int kButtonSpacing = 1;
 246   const int kRightMargin = 3;
 247
 248   close_button_->SetBounds(width() - kRightMargin - close_size.width(),
 249                            kButtonOffsetY,
 250                            close_size.width(),
 251                            close_size.height());
 252
 253   bool can_ever_resize = widget_->widget_delegate()
 254                              ? widget_->widget_delegate()->CanResize()
 255                              : false;
 256   maximize_button_->SetEnabled(can_ever_resize);
 257   gfx::Size maximize_size = maximize_button_->GetPreferredSize();
 258   maximize_button_->SetBounds(
 259       close_button_->x() - kButtonSpacing - maximize_size.width(),
 260       kButtonOffsetY,
 261       maximize_size.width(),
 262       maximize_size.height());
 263   gfx::Size restore_size = restore_button_->GetPreferredSize();
 264   restore_button_->SetBounds(
 265       close_button_->x() - kButtonSpacing - restore_size.width(),
 266       kButtonOffsetY,
 267       restore_size.width(),
 268       restore_size.height());
 269
 270   bool maximized = widget_->IsMaximized();
 271   maximize_button_->SetVisible(!maximized);
 272   restore_button_->SetVisible(maximized);
 273   if (maximized)
 274     maximize_button_->SetState(views::CustomButton::STATE_NORMAL);
 275   else
 276     restore_button_->SetState(views::CustomButton::STATE_NORMAL);
 277
 278   gfx::Size minimize_size = minimize_button_->GetPreferredSize();
 279   minimize_button_->SetState(views::CustomButton::STATE_NORMAL);
 280   minimize_button_->SetBounds(
 281       maximize_button_->x() - kButtonSpacing - minimize_size.width(),
 282       kButtonOffsetY,
 283       minimize_size.width(),
 284       minimize_size.height());
 285 }
 286
 287 void AppWindowFrameView::OnPaint(gfx::Canvas* canvas) {
 288   if (!draw_frame_)
 289     return;
 290
 291   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 292   if (ShouldPaintAsActive()) {
 293     close_button_->SetImage(
 294         views::CustomButton::STATE_NORMAL,
 295         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE).ToImageSkia());
 296   } else {
 297     close_button_->SetImage(
 298         views::CustomButton::STATE_NORMAL,
 299         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE_U).ToImageSkia());
 300   }
 301
 302   SetButtonImagesForFrame();
 303   // TODO(benwells): different look for inactive by default.
 304   SkPaint paint;
 305   paint.setAntiAlias(false);
 306   paint.setStyle(SkPaint::kFill_Style);
 307   paint.setColor(CurrentFrameColor());
 308   gfx::Path path;
 309   path.moveTo(0, 0);
 310   path.lineTo(width(), 0);
 311   path.lineTo(width(), kCaptionHeight);
 312   path.lineTo(0, kCaptionHeight);
 313   path.close();
 314   canvas->DrawPath(path, paint);
 315 }
 316
 317 const char* AppWindowFrameView::GetClassName() const { return kViewClassName; }
 318
 319 gfx::Size AppWindowFrameView::GetMinimumSize() const {
 320   gfx::Size min_size = widget_->client_view()->GetMinimumSize();
 321   if (!draw_frame_)
 322     return min_size;
 323
 324   // Ensure we can display the top of the caption area.
 325   gfx::Rect client_bounds = GetBoundsForClientView();
 326   min_size.Enlarge(0, client_bounds.y());
 327   // Ensure we have enough space for the window icon and buttons.  We allow
 328   // the title string to collapse to zero width.
 329   int closeButtonOffsetX = (kCaptionHeight - close_button_->height()) / 2;
 330   int header_width = close_button_->width() + closeButtonOffsetX * 2;
 331   if (header_width > min_size.width())
 332     min_size.set_width(header_width);
 333   return min_size;
 334 }
 335
 336 gfx::Size AppWindowFrameView::GetMaximumSize() const {
 337   gfx::Size max_size = widget_->client_view()->GetMaximumSize();
 338
 339   // Add to the client maximum size the height of any title bar and borders.
 340   gfx::Size client_size = GetBoundsForClientView().size();
 341   if (max_size.width())
 342     max_size.Enlarge(width() - client_size.width(), 0);
 343   if (max_size.height())
 344     max_size.Enlarge(0, height() - client_size.height());
 345
 346   return max_size;
 347 }
 348
 349 void AppWindowFrameView::ButtonPressed(views::Button* sender,
 350                                        const ui::Event& event) {
 351   DCHECK(draw_frame_);
 352   if (sender == close_button_)
 353     widget_->Close();
 354   else if (sender == maximize_button_)
 355     widget_->Maximize();
 356   else if (sender == restore_button_)
 357     widget_->Restore();
 358   else if (sender == minimize_button_)
 359     widget_->Minimize();
 360 }
 361
 362 SkColor AppWindowFrameView::CurrentFrameColor() {
 363   return widget_->IsActive() ? active_frame_color_ : inactive_frame_color_;
 364 }
 365
 366 void AppWindowFrameView::SetButtonImagesForFrame() {
 367   DCHECK(draw_frame_);
 368
 369   // If the frame is dark, we should use the light images so they have
 370   // some contrast.
 371   unsigned char frame_luma =
 372       color_utils::GetLuminanceForColor(CurrentFrameColor());
 373   const unsigned char kLuminanceThreshold = 100;
 374   bool use_light = frame_luma < kLuminanceThreshold;
 375
 376   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 377   if (use_light) {
 378     maximize_button_->SetImage(
 379         views::CustomButton::STATE_NORMAL,
 380         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_L).ToImageSkia());
 381     restore_button_->SetImage(
 382         views::CustomButton::STATE_NORMAL,
 383         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE_L).ToImageSkia());
 384     minimize_button_->SetImage(
 385         views::CustomButton::STATE_NORMAL,
 386         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE_L).ToImageSkia());
 387   } else {
 388     maximize_button_->SetImage(
 389         views::CustomButton::STATE_NORMAL,
 390         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE).ToImageSkia());
 391     restore_button_->SetImage(
 392         views::CustomButton::STATE_NORMAL,
 393         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE).ToImageSkia());
 394     minimize_button_->SetImage(
 395         views::CustomButton::STATE_NORMAL,
 396         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE).ToImageSkia());
 397   }
 398 }
 399
 400 }  // namespace apps