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 "ui/base/hit_test.h"
  10 #include "ui/base/resource/resource_bundle.h"
  11 #include "ui/gfx/path.h"
  12 #include "ui/gfx/screen.h"
  13 #include "ui/gfx/skia_util.h"
  14 #include "ui/native_theme/native_theme.h"
  15 #include "ui/resources/grit/ui_resources.h"
  16 #include "ui/views/bubble/bubble_border.h"
  17 #include "ui/views/controls/button/label_button.h"
  18 #include "ui/views/widget/widget.h"
  19 #include "ui/views/widget/widget_delegate.h"
  20 #include "ui/views/window/client_view.h"
  21
  22 namespace {
  23
  24 // Insets for the title bar views in pixels.
  25 const int kTitleTopInset = 12;
  26 const int kTitleLeftInset = 19;
  27 const int kTitleBottomInset = 12;
  28 const int kTitleRightInset = 7;
  29
  30 // Get the |vertical| or horizontal amount that |available_bounds| overflows
  31 // |window_bounds|.
  32 int GetOffScreenLength(const gfx::Rect& available_bounds,
  33                        const gfx::Rect& window_bounds,
  34                        bool vertical) {
  35   if (available_bounds.IsEmpty() || available_bounds.Contains(window_bounds))
  36     return 0;
  37
  38   //  window_bounds
  39   //  +---------------------------------+
  40   //  |             top                 |
  41   //  |      +------------------+       |
  42   //  | left | available_bounds | right |
  43   //  |      +------------------+       |
  44   //  |            bottom               |
  45   //  +---------------------------------+
  46   if (vertical)
  47     return std::max(0, available_bounds.y() - window_bounds.y()) +
  48            std::max(0, window_bounds.bottom() - available_bounds.bottom());
  49   return std::max(0, available_bounds.x() - window_bounds.x()) +
  50          std::max(0, window_bounds.right() - available_bounds.right());
  51 }
  52
  53 }  // namespace
  54
  55 namespace views {
  56
  57 // static
  58 const char BubbleFrameView::kViewClassName[] = "BubbleFrameView";
  59
  60 // static
  61 gfx::Insets BubbleFrameView::GetTitleInsets() {
  62   return gfx::Insets(kTitleTopInset, kTitleLeftInset,
  63                      kTitleBottomInset, kTitleRightInset);
  64 }
  65
  66 BubbleFrameView::BubbleFrameView(const gfx::Insets& content_margins)
  67     : bubble_border_(NULL),
  68       content_margins_(content_margins),
  69       title_(NULL),
  70       close_(NULL),
  71       titlebar_extra_view_(NULL) {
  72   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  73   title_ = new Label(base::string16(),
  74                      rb.GetFontList(ui::ResourceBundle::MediumFont));
  75   title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  76   AddChildView(title_);
  77
  78   close_ = new LabelButton(this, base::string16());
  79   close_->SetImage(CustomButton::STATE_NORMAL,
  80                    *rb.GetImageNamed(IDR_CLOSE_DIALOG).ToImageSkia());
  81   close_->SetImage(CustomButton::STATE_HOVERED,
  82                    *rb.GetImageNamed(IDR_CLOSE_DIALOG_H).ToImageSkia());
  83   close_->SetImage(CustomButton::STATE_PRESSED,
  84                    *rb.GetImageNamed(IDR_CLOSE_DIALOG_P).ToImageSkia());
  85   close_->SetBorder(scoped_ptr<Border>());
  86   close_->SetSize(close_->GetPreferredSize());
  87   close_->SetVisible(false);
  88   AddChildView(close_);
  89 }
  90
  91 BubbleFrameView::~BubbleFrameView() {}
  92
  93 gfx::Rect BubbleFrameView::GetBoundsForClientView() const {
  94   gfx::Rect client_bounds = GetLocalBounds();
  95   client_bounds.Inset(GetInsets());
  96   client_bounds.Inset(bubble_border_->GetInsets());
  97   return client_bounds;
  98 }
  99
 100 gfx::Rect BubbleFrameView::GetWindowBoundsForClientBounds(
 101     const gfx::Rect& client_bounds) const {
 102   return const_cast<BubbleFrameView*>(this)->GetUpdatedWindowBounds(
 103       gfx::Rect(), client_bounds.size(), false);
 104 }
 105
 106 int BubbleFrameView::NonClientHitTest(const gfx::Point& point) {
 107   if (!bounds().Contains(point))
 108     return HTNOWHERE;
 109   if (close_->visible() && close_->GetMirroredBounds().Contains(point))
 110     return HTCLOSE;
 111
 112   // Allow dialogs to show the system menu and be dragged.
 113   if (GetWidget()->widget_delegate()->AsDialogDelegate()) {
 114     gfx::Rect sys_rect(0, 0, title_->x(), title_->y());
 115     sys_rect.set_origin(gfx::Point(GetMirroredXForRect(sys_rect), 0));
 116     if (sys_rect.Contains(point))
 117       return HTSYSMENU;
 118     if (point.y() < title_->bounds().bottom())
 119       return HTCAPTION;
 120   }
 121
 122   return GetWidget()->client_view()->NonClientHitTest(point);
 123 }
 124
 125 void BubbleFrameView::GetWindowMask(const gfx::Size& size,
 126                                     gfx::Path* window_mask) {
 127   // NOTE: this only provides implementations for the types used by dialogs.
 128   if ((bubble_border_->arrow() != BubbleBorder::NONE &&
 129        bubble_border_->arrow() != BubbleBorder::FLOAT) ||
 130       (bubble_border_->shadow() != BubbleBorder::SMALL_SHADOW &&
 131        bubble_border_->shadow() != BubbleBorder::NO_SHADOW_OPAQUE_BORDER))
 132     return;
 133
 134   // Use a window mask roughly matching the border in the image assets.
 135   static const int kBorderStrokeSize = 1;
 136   static const SkScalar kCornerRadius = SkIntToScalar(6);
 137   const gfx::Insets border_insets = bubble_border_->GetInsets();
 138   SkRect rect = { SkIntToScalar(border_insets.left() - kBorderStrokeSize),
 139                   SkIntToScalar(border_insets.top() - kBorderStrokeSize),
 140                   SkIntToScalar(size.width() - border_insets.right() +
 141                                 kBorderStrokeSize),
 142                   SkIntToScalar(size.height() - border_insets.bottom() +
 143                                 kBorderStrokeSize) };
 144   if (bubble_border_->shadow() == BubbleBorder::NO_SHADOW_OPAQUE_BORDER) {
 145     window_mask->addRoundRect(rect, kCornerRadius, kCornerRadius);
 146   } else {
 147     static const int kBottomBorderShadowSize = 2;
 148     rect.fBottom += SkIntToScalar(kBottomBorderShadowSize);
 149     window_mask->addRect(rect);
 150   }
 151 }
 152
 153 void BubbleFrameView::ResetWindowControls() {
 154   close_->SetVisible(GetWidget()->widget_delegate()->ShouldShowCloseButton());
 155 }
 156
 157 void BubbleFrameView::UpdateWindowIcon() {}
 158
 159 void BubbleFrameView::UpdateWindowTitle() {
 160   title_->SetText(GetWidget()->widget_delegate()->ShouldShowWindowTitle() ?
 161       GetWidget()->widget_delegate()->GetWindowTitle() : base::string16());
 162   // Update the close button visibility too, otherwise it's not intialized.
 163   ResetWindowControls();
 164 }
 165
 166 void BubbleFrameView::SizeConstraintsChanged() {}
 167
 168 void BubbleFrameView::SetTitleFontList(const gfx::FontList& font_list) {
 169   title_->SetFontList(font_list);
 170 }
 171
 172 gfx::Insets BubbleFrameView::GetInsets() const {
 173   gfx::Insets insets = content_margins_;
 174   const int title_height = title_->text().empty() ? 0 :
 175       title_->GetPreferredSize().height() + kTitleTopInset + kTitleBottomInset;
 176   const int close_height = close_->visible() ? close_->height() : 0;
 177   insets += gfx::Insets(std::max(title_height, close_height), 0, 0, 0);
 178   return insets;
 179 }
 180
 181 gfx::Size BubbleFrameView::GetPreferredSize() const {
 182   return GetSizeForClientSize(GetWidget()->client_view()->GetPreferredSize());
 183 }
 184
 185 gfx::Size BubbleFrameView::GetMinimumSize() const {
 186   return GetSizeForClientSize(GetWidget()->client_view()->GetMinimumSize());
 187 }
 188
 189 void BubbleFrameView::Layout() {
 190   gfx::Rect bounds(GetContentsBounds());
 191   bounds.Inset(GetTitleInsets());
 192   if (bounds.IsEmpty())
 193     return;
 194
 195   // The close button top inset is actually smaller than the title top inset.
 196   close_->SetPosition(gfx::Point(bounds.right() - close_->width(),
 197                                  bounds.y() - 5));
 198
 199   gfx::Size title_size(title_->GetPreferredSize());
 200   const int title_width = std::max(0, close_->x() - bounds.x());
 201   title_size.SetToMin(gfx::Size(title_width, title_size.height()));
 202   bounds.set_size(title_size);
 203   title_->SetBoundsRect(bounds);
 204
 205   if (titlebar_extra_view_) {
 206     const int extra_width = close_->x() - title_->bounds().right();
 207     gfx::Size size = titlebar_extra_view_->GetPreferredSize();
 208     size.SetToMin(gfx::Size(std::max(0, extra_width), size.height()));
 209     gfx::Rect titlebar_extra_view_bounds(
 210         close_->x() - size.width(),
 211         bounds.y(),
 212         size.width(),
 213         bounds.height());
 214     titlebar_extra_view_bounds.Subtract(bounds);
 215     titlebar_extra_view_->SetBoundsRect(titlebar_extra_view_bounds);
 216   }
 217 }
 218
 219 const char* BubbleFrameView::GetClassName() const {
 220   return kViewClassName;
 221 }
 222
 223 void BubbleFrameView::ChildPreferredSizeChanged(View* child) {
 224   if (child == titlebar_extra_view_ || child == title_)
 225     Layout();
 226 }
 227
 228 void BubbleFrameView::OnThemeChanged() {
 229   UpdateWindowTitle();
 230   ResetWindowControls();
 231   UpdateWindowIcon();
 232 }
 233
 234 void BubbleFrameView::OnNativeThemeChanged(const ui::NativeTheme* theme) {
 235   if (bubble_border_ && bubble_border_->use_theme_background_color()) {
 236     bubble_border_->set_background_color(GetNativeTheme()->
 237         GetSystemColor(ui::NativeTheme::kColorId_DialogBackground));
 238     SchedulePaint();
 239   }
 240 }
 241
 242 void BubbleFrameView::ButtonPressed(Button* sender, const ui::Event& event) {
 243   if (sender == close_)
 244     GetWidget()->Close();
 245 }
 246
 247 void BubbleFrameView::SetBubbleBorder(scoped_ptr<BubbleBorder> border) {
 248   bubble_border_ = border.get();
 249   SetBorder(border.PassAs<Border>());
 250
 251   // Update the background, which relies on the border.
 252   set_background(new views::BubbleBackground(bubble_border_));
 253 }
 254
 255 void BubbleFrameView::SetTitlebarExtraView(View* view) {
 256   DCHECK(view);
 257   DCHECK(!titlebar_extra_view_);
 258   AddChildView(view);
 259   titlebar_extra_view_ = view;
 260 }
 261
 262 gfx::Rect BubbleFrameView::GetUpdatedWindowBounds(const gfx::Rect& anchor_rect,
 263                                                   gfx::Size client_size,
 264                                                   bool adjust_if_offscreen) {
 265   gfx::Size size(GetSizeForClientSize(client_size));
 266
 267   const BubbleBorder::Arrow arrow = bubble_border_->arrow();
 268   if (adjust_if_offscreen && BubbleBorder::has_arrow(arrow)) {
 269     // Try to mirror the anchoring if the bubble does not fit on the screen.
 270     if (!bubble_border_->is_arrow_at_center(arrow)) {
 271       MirrorArrowIfOffScreen(true, anchor_rect, size);
 272       MirrorArrowIfOffScreen(false, anchor_rect, size);
 273     } else {
 274       const bool mirror_vertical = BubbleBorder::is_arrow_on_horizontal(arrow);
 275       MirrorArrowIfOffScreen(mirror_vertical, anchor_rect, size);
 276       OffsetArrowIfOffScreen(anchor_rect, size);
 277     }
 278   }
 279
 280   // Calculate the bounds with the arrow in its updated location and offset.
 281   return bubble_border_->GetBounds(anchor_rect, size);
 282 }
 283
 284 gfx::Rect BubbleFrameView::GetAvailableScreenBounds(const gfx::Rect& rect) {
 285   // The bubble attempts to fit within the current screen bounds.
 286   // TODO(scottmg): Native is wrong. http://crbug.com/133312
 287   return gfx::Screen::GetNativeScreen()->GetDisplayNearestPoint(
 288       rect.CenterPoint()).work_area();
 289 }
 290
 291 void BubbleFrameView::MirrorArrowIfOffScreen(
 292     bool vertical,
 293     const gfx::Rect& anchor_rect,
 294     const gfx::Size& client_size) {
 295   // Check if the bounds don't fit on screen.
 296   gfx::Rect available_bounds(GetAvailableScreenBounds(anchor_rect));
 297   gfx::Rect window_bounds(bubble_border_->GetBounds(anchor_rect, client_size));
 298   if (GetOffScreenLength(available_bounds, window_bounds, vertical) > 0) {
 299     BubbleBorder::Arrow arrow = bubble_border()->arrow();
 300     // Mirror the arrow and get the new bounds.
 301     bubble_border_->set_arrow(
 302         vertical ? BubbleBorder::vertical_mirror(arrow) :
 303                    BubbleBorder::horizontal_mirror(arrow));
 304     gfx::Rect mirror_bounds =
 305         bubble_border_->GetBounds(anchor_rect, client_size);
 306     // Restore the original arrow if mirroring doesn't show more of the bubble.
 307     // Otherwise it should invoke parent's Layout() to layout the content based
 308     // on the new bubble border.
 309     if (GetOffScreenLength(available_bounds, mirror_bounds, vertical) >=
 310         GetOffScreenLength(available_bounds, window_bounds, vertical))
 311       bubble_border_->set_arrow(arrow);
 312     else if (parent())
 313       parent()->Layout();
 314   }
 315 }
 316
 317 void BubbleFrameView::OffsetArrowIfOffScreen(const gfx::Rect& anchor_rect,
 318                                              const gfx::Size& client_size) {
 319   BubbleBorder::Arrow arrow = bubble_border()->arrow();
 320   DCHECK(BubbleBorder::is_arrow_at_center(arrow));
 321
 322   // Get the desired bubble bounds without adjustment.
 323   bubble_border_->set_arrow_offset(0);
 324   gfx::Rect window_bounds(bubble_border_->GetBounds(anchor_rect, client_size));
 325
 326   gfx::Rect available_bounds(GetAvailableScreenBounds(anchor_rect));
 327   if (available_bounds.IsEmpty() || available_bounds.Contains(window_bounds))
 328     return;
 329
 330   // Calculate off-screen adjustment.
 331   const bool is_horizontal = BubbleBorder::is_arrow_on_horizontal(arrow);
 332   int offscreen_adjust = 0;
 333   if (is_horizontal) {
 334     if (window_bounds.x() < available_bounds.x())
 335       offscreen_adjust = available_bounds.x() - window_bounds.x();
 336     else if (window_bounds.right() > available_bounds.right())
 337       offscreen_adjust = available_bounds.right() - window_bounds.right();
 338   } else {
 339     if (window_bounds.y() < available_bounds.y())
 340       offscreen_adjust = available_bounds.y() - window_bounds.y();
 341     else if (window_bounds.bottom() > available_bounds.bottom())
 342       offscreen_adjust = available_bounds.bottom() - window_bounds.bottom();
 343   }
 344
 345   // For center arrows, arrows are moved in the opposite direction of
 346   // |offscreen_adjust|, e.g. positive |offscreen_adjust| means bubble
 347   // window needs to be moved to the right and that means we need to move arrow
 348   // to the left, and that means negative offset.
 349   bubble_border_->set_arrow_offset(
 350       bubble_border_->GetArrowOffset(window_bounds.size()) - offscreen_adjust);
 351   if (offscreen_adjust)
 352     SchedulePaint();
 353 }
 354
 355 gfx::Size BubbleFrameView::GetSizeForClientSize(
 356     const gfx::Size& client_size) const {
 357   // Accommodate the width of the title bar elements.
 358   int title_bar_width = GetInsets().width() + border()->GetInsets().width();
 359   if (!title_->text().empty())
 360     title_bar_width += kTitleLeftInset + title_->GetPreferredSize().width();
 361   if (close_->visible())
 362     title_bar_width += close_->width() + 1;
 363   if (titlebar_extra_view_ != NULL)
 364     title_bar_width += titlebar_extra_view_->GetPreferredSize().width();
 365   gfx::Size size(client_size);
 366   size.SetToMax(gfx::Size(title_bar_width, 0));
 367   const gfx::Insets insets(GetInsets());
 368   size.Enlarge(insets.width(), insets.height());
 369   return size;
 370 }
 371
 372 }  // namespace views