src/apps/ui/views/shell_window_frame_view.cc

   1 // Copyright 2013 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/shell_window_frame_view.h"
   6
   7 #include "apps/ui/native_app_window.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "extensions/common/draggable_region.h"
  10 #include "grit/theme_resources.h"
  11 #include "grit/ui_strings.h"  // Accessibility names
  12 #include "third_party/skia/include/core/SkPaint.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/image/image.h"
  18 #include "ui/gfx/path.h"
  19 #include "ui/views/controls/button/image_button.h"
  20 #include "ui/views/layout/grid_layout.h"
  21 #include "ui/views/views_delegate.h"
  22 #include "ui/views/widget/widget.h"
  23 #include "ui/views/widget/widget_delegate.h"
  24
  25 #if defined(USE_AURA)
  26 #include "ui/aura/env.h"
  27 #include "ui/aura/window.h"
  28 #endif
  29
  30 namespace {
  31 // Height of the chrome-style caption, in pixels.
  32 const int kCaptionHeight = 25;
  33 }  // namespace
  34
  35 namespace apps {
  36
  37 const char ShellWindowFrameView::kViewClassName[] =
  38     "browser/ui/views/extensions/ShellWindowFrameView";
  39
  40 ShellWindowFrameView::ShellWindowFrameView(NativeAppWindow* window)
  41     : window_(window),
  42       frame_(NULL),
  43       close_button_(NULL),
  44       maximize_button_(NULL),
  45       restore_button_(NULL),
  46       minimize_button_(NULL),
  47       resize_inside_bounds_size_(0),
  48       resize_area_corner_size_(0) {
  49 }
  50
  51 ShellWindowFrameView::~ShellWindowFrameView() {
  52 }
  53
  54 void ShellWindowFrameView::Init(views::Widget* frame,
  55                                 int resize_inside_bounds_size,
  56                                 int resize_outside_bounds_size,
  57                                 int resize_outside_scale_for_touch,
  58                                 int resize_area_corner_size) {
  59   frame_ = frame;
  60   resize_inside_bounds_size_ = resize_inside_bounds_size;
  61   resize_area_corner_size_ = resize_area_corner_size;
  62
  63   if (!window_->IsFrameless()) {
  64     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  65     close_button_ = new views::ImageButton(this);
  66     close_button_->SetImage(views::CustomButton::STATE_NORMAL,
  67         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE).ToImageSkia());
  68     close_button_->SetImage(views::CustomButton::STATE_HOVERED,
  69         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE_H).ToImageSkia());
  70     close_button_->SetImage(views::CustomButton::STATE_PRESSED,
  71         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE_P).ToImageSkia());
  72     close_button_->SetAccessibleName(
  73         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_CLOSE));
  74     AddChildView(close_button_);
  75     maximize_button_ = new views::ImageButton(this);
  76     maximize_button_->SetImage(views::CustomButton::STATE_NORMAL,
  77         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE).ToImageSkia());
  78     maximize_button_->SetImage(views::CustomButton::STATE_HOVERED,
  79         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_H).ToImageSkia());
  80     maximize_button_->SetImage(views::CustomButton::STATE_PRESSED,
  81         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_P).ToImageSkia());
  82     maximize_button_->SetImage(views::CustomButton::STATE_DISABLED,
  83         rb.GetNativeImageNamed(IDR_APP_WINDOW_MAXIMIZE_D).ToImageSkia());
  84     maximize_button_->SetAccessibleName(
  85         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_MAXIMIZE));
  86     AddChildView(maximize_button_);
  87     restore_button_ = new views::ImageButton(this);
  88     restore_button_->SetImage(views::CustomButton::STATE_NORMAL,
  89         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE).ToImageSkia());
  90     restore_button_->SetImage(views::CustomButton::STATE_HOVERED,
  91         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE_H).ToImageSkia());
  92     restore_button_->SetImage(views::CustomButton::STATE_PRESSED,
  93         rb.GetNativeImageNamed(IDR_APP_WINDOW_RESTORE_P).ToImageSkia());
  94     restore_button_->SetAccessibleName(
  95         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_RESTORE));
  96     AddChildView(restore_button_);
  97     minimize_button_ = new views::ImageButton(this);
  98     minimize_button_->SetImage(views::CustomButton::STATE_NORMAL,
  99         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE).ToImageSkia());
 100     minimize_button_->SetImage(views::CustomButton::STATE_HOVERED,
 101         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE_H).ToImageSkia());
 102     minimize_button_->SetImage(views::CustomButton::STATE_PRESSED,
 103         rb.GetNativeImageNamed(IDR_APP_WINDOW_MINIMIZE_P).ToImageSkia());
 104     minimize_button_->SetAccessibleName(
 105         l10n_util::GetStringUTF16(IDS_APP_ACCNAME_MINIMIZE));
 106     AddChildView(minimize_button_);
 107   }
 108
 109 #if defined(USE_AURA)
 110   aura::Window* window = frame->GetNativeWindow();
 111   // Some Aura implementations (Ash) allow resize handles outside the window.
 112   if (resize_outside_bounds_size > 0) {
 113     gfx::Insets mouse_insets = gfx::Insets(-resize_outside_bounds_size,
 114                                            -resize_outside_bounds_size,
 115                                            -resize_outside_bounds_size,
 116                                            -resize_outside_bounds_size);
 117     gfx::Insets touch_insets =
 118         mouse_insets.Scale(resize_outside_scale_for_touch);
 119     // Ensure we get resize cursors for a few pixels outside our bounds.
 120     window->SetHitTestBoundsOverrideOuter(mouse_insets, touch_insets);
 121   }
 122   // Ensure we get resize cursors just inside our bounds as well.
 123   // TODO(jeremya): do we need to update these when in fullscreen/maximized?
 124   window->set_hit_test_bounds_override_inner(
 125       gfx::Insets(resize_inside_bounds_size_, resize_inside_bounds_size_,
 126                   resize_inside_bounds_size_, resize_inside_bounds_size_));
 127 #endif
 128 }
 129
 130 // views::NonClientFrameView implementation.
 131
 132 gfx::Rect ShellWindowFrameView::GetBoundsForClientView() const {
 133   if (window_->IsFrameless() || frame_->IsFullscreen())
 134     return bounds();
 135   return gfx::Rect(0, kCaptionHeight, width(),
 136       std::max(0, height() - kCaptionHeight));
 137 }
 138
 139 gfx::Rect ShellWindowFrameView::GetWindowBoundsForClientBounds(
 140       const gfx::Rect& client_bounds) const {
 141   if (window_->IsFrameless()) {
 142     gfx::Rect window_bounds = client_bounds;
 143     // Enforce minimum size (1, 1) in case that client_bounds is passed with
 144     // empty size. This could occur when the frameless window is being
 145     // initialized.
 146     if (window_bounds.IsEmpty()) {
 147       window_bounds.set_width(1);
 148       window_bounds.set_height(1);
 149     }
 150     return window_bounds;
 151   }
 152
 153   int closeButtonOffsetX =
 154       (kCaptionHeight - close_button_->height()) / 2;
 155   int header_width = close_button_->width() + closeButtonOffsetX * 2;
 156   return gfx::Rect(client_bounds.x(),
 157                    std::max(0, client_bounds.y() - kCaptionHeight),
 158                    std::max(header_width, client_bounds.width()),
 159                    client_bounds.height() + kCaptionHeight);
 160 }
 161
 162 int ShellWindowFrameView::NonClientHitTest(const gfx::Point& point) {
 163   if (frame_->IsFullscreen())
 164     return HTCLIENT;
 165
 166   gfx::Rect expanded_bounds = bounds();
 167 #if defined(USE_AURA)
 168   // Some Aura implementations (Ash) optionally allow resize handles just
 169   // outside the window bounds.
 170   aura::Window* window = frame_->GetNativeWindow();
 171   if (aura::Env::GetInstance()->is_touch_down())
 172     expanded_bounds.Inset(window->hit_test_bounds_override_outer_touch());
 173   else
 174     expanded_bounds.Inset(window->hit_test_bounds_override_outer_mouse());
 175 #endif
 176   // Points outside the (possibly expanded) bounds can be discarded.
 177   if (!expanded_bounds.Contains(point))
 178     return HTNOWHERE;
 179
 180   // Check the frame first, as we allow a small area overlapping the contents
 181   // to be used for resize handles.
 182   bool can_ever_resize = frame_->widget_delegate() ?
 183       frame_->widget_delegate()->CanResize() :
 184       false;
 185   // Don't allow overlapping resize handles when the window is maximized or
 186   // fullscreen, as it can't be resized in those states.
 187   int resize_border =
 188       (frame_->IsMaximized() || frame_->IsFullscreen()) ? 0 :
 189       resize_inside_bounds_size_;
 190   int frame_component = GetHTComponentForFrame(point,
 191                                                resize_border,
 192                                                resize_border,
 193                                                resize_area_corner_size_,
 194                                                resize_area_corner_size_,
 195                                                can_ever_resize);
 196   if (frame_component != HTNOWHERE)
 197     return frame_component;
 198
 199   // Check for possible draggable region in the client area for the frameless
 200   // window.
 201   if (window_->IsFrameless()) {
 202     SkRegion* draggable_region = window_->GetDraggableRegion();
 203     if (draggable_region && draggable_region->contains(point.x(), point.y()))
 204       return HTCAPTION;
 205   }
 206
 207   int client_component = frame_->client_view()->NonClientHitTest(point);
 208   if (client_component != HTNOWHERE)
 209     return client_component;
 210
 211   // Then see if the point is within any of the window controls.
 212   if (close_button_ && close_button_->visible() &&
 213       close_button_->GetMirroredBounds().Contains(point)) {
 214     return HTCLOSE;
 215   }
 216   if ((maximize_button_ && maximize_button_->visible() &&
 217        maximize_button_->GetMirroredBounds().Contains(point)) ||
 218       (restore_button_ && restore_button_->visible() &&
 219        restore_button_->GetMirroredBounds().Contains(point))) {
 220     return HTMAXBUTTON;
 221   }
 222   if (minimize_button_ && minimize_button_->visible() &&
 223       minimize_button_->GetMirroredBounds().Contains(point)) {
 224     return HTMINBUTTON;
 225   }
 226
 227   // Caption is a safe default.
 228   return HTCAPTION;
 229 }
 230
 231 void ShellWindowFrameView::GetWindowMask(const gfx::Size& size,
 232                                          gfx::Path* window_mask) {
 233   // We got nothing to say about no window mask.
 234 }
 235
 236 // views::View implementation.
 237
 238 gfx::Size ShellWindowFrameView::GetPreferredSize() {
 239   gfx::Size pref = frame_->client_view()->GetPreferredSize();
 240   gfx::Rect bounds(0, 0, pref.width(), pref.height());
 241   return frame_->non_client_view()->GetWindowBoundsForClientBounds(
 242       bounds).size();
 243 }
 244
 245 void ShellWindowFrameView::Layout() {
 246   if (window_->IsFrameless())
 247     return;
 248   gfx::Size close_size = close_button_->GetPreferredSize();
 249   const int kButtonOffsetY = 0;
 250   const int kButtonSpacing = 1;
 251   const int kRightMargin = 3;
 252
 253   close_button_->SetBounds(
 254       width() - kRightMargin - close_size.width(),
 255       kButtonOffsetY,
 256       close_size.width(),
 257       close_size.height());
 258
 259   bool can_ever_resize = frame_->widget_delegate() ?
 260       frame_->widget_delegate()->CanResize() :
 261       false;
 262   maximize_button_->SetEnabled(can_ever_resize);
 263   gfx::Size maximize_size = maximize_button_->GetPreferredSize();
 264   maximize_button_->SetBounds(
 265       close_button_->x() - kButtonSpacing - maximize_size.width(),
 266       kButtonOffsetY,
 267       maximize_size.width(),
 268       maximize_size.height());
 269   gfx::Size restore_size = restore_button_->GetPreferredSize();
 270   restore_button_->SetBounds(
 271       close_button_->x() - kButtonSpacing - restore_size.width(),
 272       kButtonOffsetY,
 273       restore_size.width(),
 274       restore_size.height());
 275
 276   bool maximized = frame_->IsMaximized();
 277   maximize_button_->SetVisible(!maximized);
 278   restore_button_->SetVisible(maximized);
 279   if (maximized)
 280     maximize_button_->SetState(views::CustomButton::STATE_NORMAL);
 281   else
 282     restore_button_->SetState(views::CustomButton::STATE_NORMAL);
 283
 284   gfx::Size minimize_size = minimize_button_->GetPreferredSize();
 285   minimize_button_->SetBounds(
 286       maximize_button_->x() - kButtonSpacing - minimize_size.width(),
 287       kButtonOffsetY,
 288       minimize_size.width(),
 289       minimize_size.height());
 290 }
 291
 292 void ShellWindowFrameView::OnPaint(gfx::Canvas* canvas) {
 293   if (window_->IsFrameless())
 294     return;
 295
 296   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 297   if (ShouldPaintAsActive()) {
 298     close_button_->SetImage(views::CustomButton::STATE_NORMAL,
 299         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE).ToImageSkia());
 300   } else {
 301     close_button_->SetImage(views::CustomButton::STATE_NORMAL,
 302         rb.GetNativeImageNamed(IDR_APP_WINDOW_CLOSE_U).ToImageSkia());
 303   }
 304
 305   // TODO(jeremya): different look for inactive?
 306   SkPaint paint;
 307   paint.setAntiAlias(false);
 308   paint.setStyle(SkPaint::kFill_Style);
 309   paint.setColor(SK_ColorWHITE);
 310   gfx::Path path;
 311   path.moveTo(0, 0);
 312   path.lineTo(width(), 0);
 313   path.lineTo(width(), kCaptionHeight);
 314   path.lineTo(0, kCaptionHeight);
 315   path.close();
 316   canvas->DrawPath(path, paint);
 317 }
 318
 319 const char* ShellWindowFrameView::GetClassName() const {
 320   return kViewClassName;
 321 }
 322
 323 gfx::Size ShellWindowFrameView::GetMinimumSize() {
 324   gfx::Size min_size = frame_->client_view()->GetMinimumSize();
 325   if (window_->IsFrameless())
 326     return min_size;
 327
 328   // Ensure we can display the top of the caption area.
 329   gfx::Rect client_bounds = GetBoundsForClientView();
 330   min_size.Enlarge(0, client_bounds.y());
 331   // Ensure we have enough space for the window icon and buttons.  We allow
 332   // the title string to collapse to zero width.
 333   int closeButtonOffsetX =
 334       (kCaptionHeight - close_button_->height()) / 2;
 335   int header_width = close_button_->width() + closeButtonOffsetX * 2;
 336   if (header_width > min_size.width())
 337     min_size.set_width(header_width);
 338   return min_size;
 339 }
 340
 341 gfx::Size ShellWindowFrameView::GetMaximumSize() {
 342   gfx::Size max_size = frame_->client_view()->GetMaximumSize();
 343
 344   // Add to the client maximum size the height of any title bar and borders.
 345   gfx::Size client_size = GetBoundsForClientView().size();
 346   if (max_size.width())
 347     max_size.Enlarge(width() - client_size.width(), 0);
 348   if (max_size.height())
 349     max_size.Enlarge(0, height() - client_size.height());
 350
 351   return max_size;
 352 }
 353
 354 // views::ButtonListener implementation.
 355
 356 void ShellWindowFrameView::ButtonPressed(views::Button* sender,
 357                                          const ui::Event& event) {
 358   DCHECK(!window_->IsFrameless());
 359   if (sender == close_button_)
 360     frame_->Close();
 361   else if (sender == maximize_button_)
 362     frame_->Maximize();
 363   else if (sender == restore_button_)
 364     frame_->Restore();
 365   else if (sender == minimize_button_)
 366     frame_->Minimize();
 367 }
 368
 369 }  // namespace apps