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 BubbleFrameView::BubbleFrameView(const gfx::Insets& content_margins)
  61     : bubble_border_(NULL),
  62       content_margins_(content_margins),
  63       title_(NULL),
  64       close_(NULL),
  65       titlebar_extra_view_(NULL) {
  66   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  67   title_ = new Label(base::string16(),
  68                      rb.GetFontList(ui::ResourceBundle::MediumFont));
  69   title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  70   AddChildView(title_);
  71
  72   close_ = CreateCloseButton(this);
  73   close_->SetVisible(false);
  74   AddChildView(close_);
  75 }
  76
  77 BubbleFrameView::~BubbleFrameView() {}
  78
  79 // static
  80 gfx::Insets BubbleFrameView::GetTitleInsets() {
  81   return gfx::Insets(
  82       kTitleTopInset, kTitleLeftInset, kTitleBottomInset, kTitleRightInset);
  83 }
  84
  85 // static
  86 LabelButton* BubbleFrameView::CreateCloseButton(ButtonListener* listener) {
  87   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  88   LabelButton* close = new LabelButton(listener, base::string16());
  89   close->SetImage(CustomButton::STATE_NORMAL,
  90                   *rb.GetImageNamed(IDR_CLOSE_DIALOG).ToImageSkia());
  91   close->SetImage(CustomButton::STATE_HOVERED,
  92                   *rb.GetImageNamed(IDR_CLOSE_DIALOG_H).ToImageSkia());
  93   close->SetImage(CustomButton::STATE_PRESSED,
  94                   *rb.GetImageNamed(IDR_CLOSE_DIALOG_P).ToImageSkia());
  95   close->SetBorder(scoped_ptr<Border>());
  96   close->SetSize(close->GetPreferredSize());
  97   return close;
  98 }
  99
 100 gfx::Rect BubbleFrameView::GetBoundsForClientView() const {
 101   gfx::Rect client_bounds = GetLocalBounds();
 102   client_bounds.Inset(GetInsets());
 103   client_bounds.Inset(bubble_border_->GetInsets());
 104   return client_bounds;
 105 }
 106
 107 gfx::Rect BubbleFrameView::GetWindowBoundsForClientBounds(
 108     const gfx::Rect& client_bounds) const {
 109   return const_cast<BubbleFrameView*>(this)->GetUpdatedWindowBounds(
 110       gfx::Rect(), client_bounds.size(), false);
 111 }
 112
 113 int BubbleFrameView::NonClientHitTest(const gfx::Point& point) {
 114   if (!bounds().Contains(point))
 115     return HTNOWHERE;
 116   if (close_->visible() && close_->GetMirroredBounds().Contains(point))
 117     return HTCLOSE;
 118
 119   // Allow dialogs to show the system menu and be dragged.
 120   if (GetWidget()->widget_delegate()->AsDialogDelegate()) {
 121     gfx::Rect sys_rect(0, 0, title_->x(), title_->y());
 122     sys_rect.set_origin(gfx::Point(GetMirroredXForRect(sys_rect), 0));
 123     if (sys_rect.Contains(point))
 124       return HTSYSMENU;
 125     if (point.y() < title_->bounds().bottom())
 126       return HTCAPTION;
 127   }
 128
 129   return GetWidget()->client_view()->NonClientHitTest(point);
 130 }
 131
 132 void BubbleFrameView::GetWindowMask(const gfx::Size& size,
 133                                     gfx::Path* window_mask) {
 134   // NOTE: this only provides implementations for the types used by dialogs.
 135   if ((bubble_border_->arrow() != BubbleBorder::NONE &&
 136        bubble_border_->arrow() != BubbleBorder::FLOAT) ||
 137       (bubble_border_->shadow() != BubbleBorder::SMALL_SHADOW &&
 138        bubble_border_->shadow() != BubbleBorder::NO_SHADOW_OPAQUE_BORDER))
 139     return;
 140
 141   // Use a window mask roughly matching the border in the image assets.
 142   static const int kBorderStrokeSize = 1;
 143   static const SkScalar kCornerRadius = SkIntToScalar(6);
 144   const gfx::Insets border_insets = bubble_border_->GetInsets();
 145   SkRect rect = { SkIntToScalar(border_insets.left() - kBorderStrokeSize),
 146                   SkIntToScalar(border_insets.top() - kBorderStrokeSize),
 147                   SkIntToScalar(size.width() - border_insets.right() +
 148                                 kBorderStrokeSize),
 149                   SkIntToScalar(size.height() - border_insets.bottom() +
 150                                 kBorderStrokeSize) };
 151   if (bubble_border_->shadow() == BubbleBorder::NO_SHADOW_OPAQUE_BORDER) {
 152     window_mask->addRoundRect(rect, kCornerRadius, kCornerRadius);
 153   } else {
 154     static const int kBottomBorderShadowSize = 2;
 155     rect.fBottom += SkIntToScalar(kBottomBorderShadowSize);
 156     window_mask->addRect(rect);
 157   }
 158 }
 159
 160 void BubbleFrameView::ResetWindowControls() {
 161   close_->SetVisible(GetWidget()->widget_delegate()->ShouldShowCloseButton());
 162 }
 163
 164 void BubbleFrameView::UpdateWindowIcon() {}
 165
 166 void BubbleFrameView::UpdateWindowTitle() {
 167   title_->SetText(GetWidget()->widget_delegate()->ShouldShowWindowTitle() ?
 168       GetWidget()->widget_delegate()->GetWindowTitle() : base::string16());
 169   // Update the close button visibility too, otherwise it's not intialized.
 170   ResetWindowControls();
 171 }
 172
 173 void BubbleFrameView::SizeConstraintsChanged() {}
 174
 175 void BubbleFrameView::SetTitleFontList(const gfx::FontList& font_list) {
 176   title_->SetFontList(font_list);
 177 }
 178
 179 gfx::Insets BubbleFrameView::GetInsets() const {
 180   gfx::Insets insets = content_margins_;
 181   const int title_height = title_->text().empty() ? 0 :
 182       title_->GetPreferredSize().height() + kTitleTopInset + kTitleBottomInset;
 183   const int close_height = close_->visible() ? close_->height() : 0;
 184   insets += gfx::Insets(std::max(title_height, close_height), 0, 0, 0);
 185   return insets;
 186 }
 187
 188 gfx::Size BubbleFrameView::GetPreferredSize() const {
 189   return GetSizeForClientSize(GetWidget()->client_view()->GetPreferredSize());
 190 }
 191
 192 gfx::Size BubbleFrameView::GetMinimumSize() const {
 193   return GetSizeForClientSize(GetWidget()->client_view()->GetMinimumSize());
 194 }
 195
 196 void BubbleFrameView::Layout() {
 197   gfx::Rect bounds(GetContentsBounds());
 198   bounds.Inset(GetTitleInsets());
 199   if (bounds.IsEmpty())
 200     return;
 201
 202   // The close button top inset is actually smaller than the title top inset.
 203   close_->SetPosition(gfx::Point(bounds.right() - close_->width(),
 204                                  bounds.y() - 5));
 205
 206   gfx::Size title_size(title_->GetPreferredSize());
 207   const int title_width = std::max(0, close_->x() - bounds.x());
 208   title_size.SetToMin(gfx::Size(title_width, title_size.height()));
 209   bounds.set_size(title_size);
 210   title_->SetBoundsRect(bounds);
 211
 212   if (titlebar_extra_view_) {
 213     const int extra_width = close_->x() - title_->bounds().right();
 214     gfx::Size size = titlebar_extra_view_->GetPreferredSize();
 215     size.SetToMin(gfx::Size(std::max(0, extra_width), size.height()));
 216     gfx::Rect titlebar_extra_view_bounds(
 217         close_->x() - size.width(),
 218         bounds.y(),
 219         size.width(),
 220         bounds.height());
 221     titlebar_extra_view_bounds.Subtract(bounds);
 222     titlebar_extra_view_->SetBoundsRect(titlebar_extra_view_bounds);
 223   }
 224 }
 225
 226 const char* BubbleFrameView::GetClassName() const {
 227   return kViewClassName;
 228 }
 229
 230 void BubbleFrameView::ChildPreferredSizeChanged(View* child) {
 231   if (child == titlebar_extra_view_ || child == title_)
 232     Layout();
 233 }
 234
 235 void BubbleFrameView::OnThemeChanged() {
 236   UpdateWindowTitle();
 237   ResetWindowControls();
 238   UpdateWindowIcon();
 239 }
 240
 241 void BubbleFrameView::OnNativeThemeChanged(const ui::NativeTheme* theme) {
 242   if (bubble_border_ && bubble_border_->use_theme_background_color()) {
 243     bubble_border_->set_background_color(GetNativeTheme()->
 244         GetSystemColor(ui::NativeTheme::kColorId_DialogBackground));
 245     SchedulePaint();
 246   }
 247 }
 248
 249 void BubbleFrameView::ButtonPressed(Button* sender, const ui::Event& event) {
 250   if (sender == close_)
 251     GetWidget()->Close();
 252 }
 253
 254 void BubbleFrameView::SetBubbleBorder(scoped_ptr<BubbleBorder> border) {
 255   bubble_border_ = border.get();
 256   SetBorder(border.Pass());
 257
 258   // Update the background, which relies on the border.
 259   set_background(new views::BubbleBackground(bubble_border_));
 260 }
 261
 262 void BubbleFrameView::SetTitlebarExtraView(View* view) {
 263   DCHECK(view);
 264   DCHECK(!titlebar_extra_view_);
 265   AddChildView(view);
 266   titlebar_extra_view_ = view;
 267 }
 268
 269 gfx::Rect BubbleFrameView::GetUpdatedWindowBounds(const gfx::Rect& anchor_rect,
 270                                                   gfx::Size client_size,
 271                                                   bool adjust_if_offscreen) {
 272   gfx::Size size(GetSizeForClientSize(client_size));
 273
 274   const BubbleBorder::Arrow arrow = bubble_border_->arrow();
 275   if (adjust_if_offscreen && BubbleBorder::has_arrow(arrow)) {
 276     // Try to mirror the anchoring if the bubble does not fit on the screen.
 277     if (!bubble_border_->is_arrow_at_center(arrow)) {
 278       MirrorArrowIfOffScreen(true, anchor_rect, size);
 279       MirrorArrowIfOffScreen(false, anchor_rect, size);
 280     } else {
 281       const bool mirror_vertical = BubbleBorder::is_arrow_on_horizontal(arrow);
 282       MirrorArrowIfOffScreen(mirror_vertical, anchor_rect, size);
 283       OffsetArrowIfOffScreen(anchor_rect, size);
 284     }
 285   }
 286
 287   // Calculate the bounds with the arrow in its updated location and offset.
 288   return bubble_border_->GetBounds(anchor_rect, size);
 289 }
 290
 291 gfx::Rect BubbleFrameView::GetAvailableScreenBounds(const gfx::Rect& rect) {
 292   // The bubble attempts to fit within the current screen bounds.
 293   // TODO(scottmg): Native is wrong. http://crbug.com/133312
 294   return gfx::Screen::GetNativeScreen()->GetDisplayNearestPoint(
 295       rect.CenterPoint()).work_area();
 296 }
 297
 298 bool BubbleFrameView::IsCloseButtonVisible() const {
 299   return close_->visible();
 300 }
 301
 302 gfx::Rect BubbleFrameView::GetCloseButtonBounds() const {
 303   return close_->bounds();
 304 }
 305
 306 void BubbleFrameView::MirrorArrowIfOffScreen(
 307     bool vertical,
 308     const gfx::Rect& anchor_rect,
 309     const gfx::Size& client_size) {
 310   // Check if the bounds don't fit on screen.
 311   gfx::Rect available_bounds(GetAvailableScreenBounds(anchor_rect));
 312   gfx::Rect window_bounds(bubble_border_->GetBounds(anchor_rect, client_size));
 313   if (GetOffScreenLength(available_bounds, window_bounds, vertical) > 0) {
 314     BubbleBorder::Arrow arrow = bubble_border()->arrow();
 315     // Mirror the arrow and get the new bounds.
 316     bubble_border_->set_arrow(
 317         vertical ? BubbleBorder::vertical_mirror(arrow) :
 318                    BubbleBorder::horizontal_mirror(arrow));
 319     gfx::Rect mirror_bounds =
 320         bubble_border_->GetBounds(anchor_rect, client_size);
 321     // Restore the original arrow if mirroring doesn't show more of the bubble.
 322     // Otherwise it should invoke parent's Layout() to layout the content based
 323     // on the new bubble border.
 324     if (GetOffScreenLength(available_bounds, mirror_bounds, vertical) >=
 325         GetOffScreenLength(available_bounds, window_bounds, vertical))
 326       bubble_border_->set_arrow(arrow);
 327     else if (parent())
 328       parent()->Layout();
 329   }
 330 }
 331
 332 void BubbleFrameView::OffsetArrowIfOffScreen(const gfx::Rect& anchor_rect,
 333                                              const gfx::Size& client_size) {
 334   BubbleBorder::Arrow arrow = bubble_border()->arrow();
 335   DCHECK(BubbleBorder::is_arrow_at_center(arrow));
 336
 337   // Get the desired bubble bounds without adjustment.
 338   bubble_border_->set_arrow_offset(0);
 339   gfx::Rect window_bounds(bubble_border_->GetBounds(anchor_rect, client_size));
 340
 341   gfx::Rect available_bounds(GetAvailableScreenBounds(anchor_rect));
 342   if (available_bounds.IsEmpty() || available_bounds.Contains(window_bounds))
 343     return;
 344
 345   // Calculate off-screen adjustment.
 346   const bool is_horizontal = BubbleBorder::is_arrow_on_horizontal(arrow);
 347   int offscreen_adjust = 0;
 348   if (is_horizontal) {
 349     if (window_bounds.x() < available_bounds.x())
 350       offscreen_adjust = available_bounds.x() - window_bounds.x();
 351     else if (window_bounds.right() > available_bounds.right())
 352       offscreen_adjust = available_bounds.right() - window_bounds.right();
 353   } else {
 354     if (window_bounds.y() < available_bounds.y())
 355       offscreen_adjust = available_bounds.y() - window_bounds.y();
 356     else if (window_bounds.bottom() > available_bounds.bottom())
 357       offscreen_adjust = available_bounds.bottom() - window_bounds.bottom();
 358   }
 359
 360   // For center arrows, arrows are moved in the opposite direction of
 361   // |offscreen_adjust|, e.g. positive |offscreen_adjust| means bubble
 362   // window needs to be moved to the right and that means we need to move arrow
 363   // to the left, and that means negative offset.
 364   bubble_border_->set_arrow_offset(
 365       bubble_border_->GetArrowOffset(window_bounds.size()) - offscreen_adjust);
 366   if (offscreen_adjust)
 367     SchedulePaint();
 368 }
 369
 370 gfx::Size BubbleFrameView::GetSizeForClientSize(
 371     const gfx::Size& client_size) const {
 372   // Accommodate the width of the title bar elements.
 373   int title_bar_width = GetInsets().width() + border()->GetInsets().width();
 374   if (!title_->text().empty())
 375     title_bar_width += kTitleLeftInset + title_->GetPreferredSize().width();
 376   if (close_->visible())
 377     title_bar_width += close_->width() + 1;
 378   if (titlebar_extra_view_ != NULL)
 379     title_bar_width += titlebar_extra_view_->GetPreferredSize().width();
 380   gfx::Size size(client_size);
 381   size.SetToMax(gfx::Size(title_bar_width, 0));
 382   const gfx::Insets insets(GetInsets());
 383   size.Enlarge(insets.width(), insets.height());
 384   return size;
 385 }
 386
 387 }  // namespace views