src/ui/views/bubble/bubble_frame_view.cc

   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 "ui/views/bubble/bubble_frame_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "grit/ui_resources.h"
  10 #include "ui/base/hit_test.h"
  11 #include "ui/base/resource/resource_bundle.h"
  12 #include "ui/gfx/path.h"
  13 #include "ui/gfx/screen.h"
  14 #include "ui/gfx/skia_util.h"
  15 #include "ui/views/bubble/bubble_border.h"
  16 #include "ui/views/controls/button/label_button.h"
  17 #include "ui/views/widget/widget.h"
  18 #include "ui/views/widget/widget_delegate.h"
  19 #include "ui/views/window/client_view.h"
  20
  21 namespace {
  22
  23 // Padding, in pixels, for the title view, when it exists.
  24 const int kTitleTopInset = 12;
  25 const int kTitleLeftInset = 19;
  26 const int kTitleBottomInset = 12;
  27
  28 // Get the |vertical| or horizontal screen overflow of the |window_bounds|.
  29 int GetOffScreenLength(const gfx::Rect& monitor_bounds,
  30                        const gfx::Rect& window_bounds,
  31                        bool vertical) {
  32   if (monitor_bounds.IsEmpty() || monitor_bounds.Contains(window_bounds))
  33     return 0;
  34
  35   //  window_bounds
  36   //  +-------------------------------+
  37   //  |             top               |
  38   //  |      +----------------+       |
  39   //  | left | monitor_bounds | right |
  40   //  |      +----------------+       |
  41   //  |            bottom             |
  42   //  +-------------------------------+
  43   if (vertical)
  44     return std::max(0, monitor_bounds.y() - window_bounds.y()) +
  45            std::max(0, window_bounds.bottom() - monitor_bounds.bottom());
  46   return std::max(0, monitor_bounds.x() - window_bounds.x()) +
  47          std::max(0, window_bounds.right() - monitor_bounds.right());
  48 }
  49
  50 }  // namespace
  51
  52 namespace views {
  53
  54 // static
  55 const char BubbleFrameView::kViewClassName[] = "BubbleFrameView";
  56
  57 // static
  58 gfx::Insets BubbleFrameView::GetTitleInsets() {
  59   return gfx::Insets(kTitleTopInset, kTitleLeftInset, kTitleBottomInset, 0);
  60 }
  61
  62 BubbleFrameView::BubbleFrameView(const gfx::Insets& content_margins)
  63     : bubble_border_(NULL),
  64       content_margins_(content_margins),
  65       title_(NULL),
  66       close_(NULL),
  67       titlebar_extra_view_(NULL) {
  68   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  69   title_ = new Label(string16(), rb.GetFont(ui::ResourceBundle::MediumFont));
  70   title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  71   AddChildView(title_);
  72
  73   close_ = new LabelButton(this, string16());
  74   close_->SetImage(CustomButton::STATE_NORMAL,
  75                    *rb.GetImageNamed(IDR_CLOSE_DIALOG).ToImageSkia());
  76   close_->SetImage(CustomButton::STATE_HOVERED,
  77                    *rb.GetImageNamed(IDR_CLOSE_DIALOG_H).ToImageSkia());
  78   close_->SetImage(CustomButton::STATE_PRESSED,
  79                    *rb.GetImageNamed(IDR_CLOSE_DIALOG_P).ToImageSkia());
  80   close_->SetSize(close_->GetPreferredSize());
  81   close_->set_border(NULL);
  82   close_->SetVisible(false);
  83   AddChildView(close_);
  84 }
  85
  86 BubbleFrameView::~BubbleFrameView() {}
  87
  88 gfx::Rect BubbleFrameView::GetBoundsForClientView() const {
  89   gfx::Rect client_bounds = GetLocalBounds();
  90   client_bounds.Inset(GetInsets());
  91   client_bounds.Inset(bubble_border_->GetInsets());
  92   return client_bounds;
  93 }
  94
  95 gfx::Rect BubbleFrameView::GetWindowBoundsForClientBounds(
  96     const gfx::Rect& client_bounds) const {
  97   return const_cast<BubbleFrameView*>(this)->GetUpdatedWindowBounds(
  98       gfx::Rect(), client_bounds.size(), false);
  99 }
 100
 101 int BubbleFrameView::NonClientHitTest(const gfx::Point& point) {
 102   if (!bounds().Contains(point))
 103     return HTNOWHERE;
 104   if (close_->visible() && close_->GetMirroredBounds().Contains(point))
 105     return HTCLOSE;
 106
 107   // Allow dialogs to show the system menu and be dragged.
 108   if (GetWidget()->widget_delegate()->AsDialogDelegate()) {
 109     gfx::Rect sys_rect(0, 0, title_->x(), title_->y());
 110     sys_rect.set_origin(gfx::Point(GetMirroredXForRect(sys_rect), 0));
 111     if (sys_rect.Contains(point))
 112       return HTSYSMENU;
 113     if (point.y() < title_->bounds().bottom())
 114       return HTCAPTION;
 115   }
 116
 117   return GetWidget()->client_view()->NonClientHitTest(point);
 118 }
 119
 120 void BubbleFrameView::GetWindowMask(const gfx::Size& size,
 121                                     gfx::Path* window_mask) {
 122   // NOTE: this only provides implementations for the types used by dialogs.
 123   if ((bubble_border_->arrow() != BubbleBorder::NONE &&
 124        bubble_border_->arrow() != BubbleBorder::FLOAT) ||
 125       (bubble_border_->shadow() != BubbleBorder::SMALL_SHADOW &&
 126        bubble_border_->shadow() != BubbleBorder::NO_SHADOW_OPAQUE_BORDER))
 127     return;
 128
 129   // Use a window mask roughly matching the border in the image assets.
 130   static const int kBorderStrokeSize = 1;
 131   static const SkScalar kCornerRadius = SkIntToScalar(6);
 132   const gfx::Insets border_insets = bubble_border_->GetInsets();
 133   SkRect rect = { SkIntToScalar(border_insets.left() - kBorderStrokeSize),
 134                   SkIntToScalar(border_insets.top() - kBorderStrokeSize),
 135                   SkIntToScalar(size.width() - border_insets.right() +
 136                                 kBorderStrokeSize),
 137                   SkIntToScalar(size.height() - border_insets.bottom() +
 138                                 kBorderStrokeSize) };
 139   if (bubble_border_->shadow() == BubbleBorder::NO_SHADOW_OPAQUE_BORDER) {
 140     window_mask->addRoundRect(rect, kCornerRadius, kCornerRadius);
 141   } else {
 142     static const int kBottomBorderShadowSize = 2;
 143     rect.fBottom += SkIntToScalar(kBottomBorderShadowSize);
 144     window_mask->addRect(rect);
 145   }
 146 }
 147
 148 void BubbleFrameView::ResetWindowControls() {
 149   close_->SetVisible(GetWidget()->widget_delegate()->ShouldShowCloseButton());
 150 }
 151
 152 void BubbleFrameView::UpdateWindowIcon() {}
 153
 154 void BubbleFrameView::UpdateWindowTitle() {
 155   title_->SetText(GetWidget()->widget_delegate()->ShouldShowWindowTitle() ?
 156       GetWidget()->widget_delegate()->GetWindowTitle() : string16());
 157   // Update the close button visibility too, otherwise it's not intialized.
 158   ResetWindowControls();
 159 }
 160
 161 gfx::Insets BubbleFrameView::GetInsets() const {
 162   gfx::Insets insets = content_margins_;
 163   const int title_height = title_->text().empty() ? 0 :
 164       title_->GetPreferredSize().height() + kTitleTopInset + kTitleBottomInset;
 165   const int close_height = close_->visible() ? close_->height() : 0;
 166   insets += gfx::Insets(std::max(title_height, close_height), 0, 0, 0);
 167   return insets;
 168 }
 169
 170 gfx::Size BubbleFrameView::GetPreferredSize() {
 171   return GetSizeForClientSize(GetWidget()->client_view()->GetPreferredSize());
 172 }
 173
 174 gfx::Size BubbleFrameView::GetMinimumSize() {
 175   return GetSizeForClientSize(GetWidget()->client_view()->GetMinimumSize());
 176 }
 177
 178 void BubbleFrameView::Layout() {
 179   gfx::Rect bounds(GetLocalBounds());
 180   bounds.Inset(border()->GetInsets());
 181   // Small additional insets yield the desired 10px visual close button insets.
 182   bounds.Inset(0, 0, close_->width() + 1, 0);
 183   close_->SetPosition(gfx::Point(bounds.right(), bounds.y() + 2));
 184
 185   gfx::Rect title_bounds(bounds);
 186   title_bounds.Inset(kTitleLeftInset, kTitleTopInset, 0, 0);
 187   gfx::Size title_size(title_->GetPreferredSize());
 188   const int title_width = std::max(0, close_->bounds().x() - title_bounds.x());
 189   title_size.SetToMin(gfx::Size(title_width, title_size.height()));
 190   title_bounds.set_size(title_size);
 191   title_->SetBoundsRect(title_bounds);
 192
 193   if (titlebar_extra_view_) {
 194     const int extra_width = close_->bounds().x() - title_->bounds().right();
 195     gfx::Size size = titlebar_extra_view_->GetPreferredSize();
 196     size.SetToMin(gfx::Size(std::max(0, extra_width), size.height()));
 197     gfx::Rect titlebar_extra_view_bounds(
 198         bounds.right() - size.width(),
 199         title_bounds.y(),
 200         size.width(),
 201         title_bounds.height());
 202     titlebar_extra_view_bounds.Subtract(title_bounds);
 203     titlebar_extra_view_->SetBoundsRect(titlebar_extra_view_bounds);
 204   }
 205 }
 206
 207 const char* BubbleFrameView::GetClassName() const {
 208   return kViewClassName;
 209 }
 210
 211 void BubbleFrameView::ChildPreferredSizeChanged(View* child) {
 212   if (child == titlebar_extra_view_ || child == title_)
 213     Layout();
 214 }
 215
 216 void BubbleFrameView::OnThemeChanged() {
 217   UpdateWindowTitle();
 218   ResetWindowControls();
 219   UpdateWindowIcon();
 220 }
 221
 222 void BubbleFrameView::ButtonPressed(Button* sender, const ui::Event& event) {
 223   if (sender == close_)
 224     GetWidget()->Close();
 225 }
 226
 227 void BubbleFrameView::SetBubbleBorder(BubbleBorder* border) {
 228   bubble_border_ = border;
 229   set_border(bubble_border_);
 230
 231   // Update the background, which relies on the border.
 232   set_background(new views::BubbleBackground(border));
 233 }
 234
 235 void BubbleFrameView::SetTitlebarExtraView(View* view) {
 236   DCHECK(view);
 237   DCHECK(!titlebar_extra_view_);
 238   AddChildView(view);
 239   titlebar_extra_view_ = view;
 240 }
 241
 242 gfx::Rect BubbleFrameView::GetUpdatedWindowBounds(const gfx::Rect& anchor_rect,
 243                                                   gfx::Size client_size,
 244                                                   bool adjust_if_offscreen) {
 245   gfx::Insets insets(GetInsets());
 246   client_size.Enlarge(insets.width(), insets.height());
 247
 248   const BubbleBorder::Arrow arrow = bubble_border_->arrow();
 249   if (adjust_if_offscreen && BubbleBorder::has_arrow(arrow)) {
 250     if (!bubble_border_->is_arrow_at_center(arrow)) {
 251       // Try to mirror the anchoring if the bubble does not fit on the screen.
 252       MirrorArrowIfOffScreen(true, anchor_rect, client_size);
 253       MirrorArrowIfOffScreen(false, anchor_rect, client_size);
 254     } else {
 255       // Mirror as needed vertically if the arrow is on a horizontal edge and
 256       // vice-versa.
 257       MirrorArrowIfOffScreen(BubbleBorder::is_arrow_on_horizontal(arrow),
 258                              anchor_rect,
 259                              client_size);
 260       OffsetArrowIfOffScreen(anchor_rect, client_size);
 261     }
 262   }
 263
 264   // Calculate the bounds with the arrow in its updated location and offset.
 265   return bubble_border_->GetBounds(anchor_rect, client_size);
 266 }
 267
 268 gfx::Rect BubbleFrameView::GetMonitorBounds(const gfx::Rect& rect) {
 269   // TODO(scottmg): Native is wrong. http://crbug.com/133312
 270   return gfx::Screen::GetNativeScreen()->GetDisplayNearestPoint(
 271       rect.CenterPoint()).work_area();
 272 }
 273
 274 void BubbleFrameView::MirrorArrowIfOffScreen(
 275     bool vertical,
 276     const gfx::Rect& anchor_rect,
 277     const gfx::Size& client_size) {
 278   // Check if the bounds don't fit on screen.
 279   gfx::Rect monitor_rect(GetMonitorBounds(anchor_rect));
 280   gfx::Rect window_bounds(bubble_border_->GetBounds(anchor_rect, client_size));
 281   if (GetOffScreenLength(monitor_rect, window_bounds, vertical) > 0) {
 282     BubbleBorder::Arrow arrow = bubble_border()->arrow();
 283     // Mirror the arrow and get the new bounds.
 284     bubble_border_->set_arrow(
 285         vertical ? BubbleBorder::vertical_mirror(arrow) :
 286                    BubbleBorder::horizontal_mirror(arrow));
 287     gfx::Rect mirror_bounds =
 288         bubble_border_->GetBounds(anchor_rect, client_size);
 289     // Restore the original arrow if mirroring doesn't show more of the bubble.
 290     if (GetOffScreenLength(monitor_rect, mirror_bounds, vertical) >=
 291         GetOffScreenLength(monitor_rect, window_bounds, vertical))
 292       bubble_border_->set_arrow(arrow);
 293     else
 294       SchedulePaint();
 295   }
 296 }
 297
 298 void BubbleFrameView::OffsetArrowIfOffScreen(const gfx::Rect& anchor_rect,
 299                                              const gfx::Size& client_size) {
 300   BubbleBorder::Arrow arrow = bubble_border()->arrow();
 301   DCHECK(BubbleBorder::is_arrow_at_center(arrow));
 302
 303   // Get the desired bubble bounds without adjustment.
 304   bubble_border_->set_arrow_offset(0);
 305   gfx::Rect window_bounds(bubble_border_->GetBounds(anchor_rect, client_size));
 306
 307   gfx::Rect monitor_rect(GetMonitorBounds(anchor_rect));
 308   if (monitor_rect.IsEmpty() || monitor_rect.Contains(window_bounds))
 309     return;
 310
 311   // Calculate off-screen adjustment.
 312   const bool is_horizontal = BubbleBorder::is_arrow_on_horizontal(arrow);
 313   int offscreen_adjust = 0;
 314   if (is_horizontal) {
 315     if (window_bounds.x() < monitor_rect.x())
 316       offscreen_adjust = monitor_rect.x() - window_bounds.x();
 317     else if (window_bounds.right() > monitor_rect.right())
 318       offscreen_adjust = monitor_rect.right() - window_bounds.right();
 319   } else {
 320     if (window_bounds.y() < monitor_rect.y())
 321       offscreen_adjust = monitor_rect.y() - window_bounds.y();
 322     else if (window_bounds.bottom() > monitor_rect.bottom())
 323       offscreen_adjust = monitor_rect.bottom() - window_bounds.bottom();
 324   }
 325
 326   // For center arrows, arrows are moved in the opposite direction of
 327   // |offscreen_adjust|, e.g. positive |offscreen_adjust| means bubble
 328   // window needs to be moved to the right and that means we need to move arrow
 329   // to the left, and that means negative offset.
 330   bubble_border_->set_arrow_offset(
 331       bubble_border_->GetArrowOffset(window_bounds.size()) - offscreen_adjust);
 332   if (offscreen_adjust)
 333     SchedulePaint();
 334 }
 335
 336 gfx::Size BubbleFrameView::GetSizeForClientSize(const gfx::Size& client_size) {
 337   gfx::Size size(
 338       GetUpdatedWindowBounds(gfx::Rect(), client_size, false).size());
 339   // Accommodate the width of the title bar elements.
 340   int title_bar_width = GetInsets().width() + border()->GetInsets().width();
 341   if (!title_->text().empty())
 342     title_bar_width += kTitleLeftInset + title_->GetPreferredSize().width();
 343   if (close_->visible())
 344     title_bar_width += close_->width() + 1;
 345   if (titlebar_extra_view_ != NULL)
 346     title_bar_width += titlebar_extra_view_->GetPreferredSize().width();
 347   size.SetToMax(gfx::Size(title_bar_width, 0));
 348   return size;
 349 }
 350
 351 }  // namespace views