| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/views/corewm/tooltip_aura.h" |
| |
| #include "base/macros.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_tree_host.h" |
| #include "ui/display/display.h" |
| #include "ui/display/screen.h" |
| #include "ui/gfx/canvas.h" |
| #include "ui/gfx/render_text.h" |
| #include "ui/gfx/text_elider.h" |
| #include "ui/gfx/text_utils.h" |
| #include "ui/native_theme/native_theme.h" |
| #include "ui/views/background.h" |
| #include "ui/views/border.h" |
| #include "ui/views/painter.h" |
| #include "ui/views/view.h" |
| #include "ui/views/widget/widget.h" |
| |
| namespace { |
| |
| // Max visual tooltip width. If a tooltip is greater than this width, it will |
| // be wrapped. |
| const int kTooltipMaxWidthPixels = 400; |
| |
| // FIXME: get cursor offset from actual cursor size. |
| const int kCursorOffsetX = 10; |
| const int kCursorOffsetY = 15; |
| |
| // TODO(varkha): Update if native widget can be transparent on Linux. |
| bool CanUseTranslucentTooltipWidget() { |
| #if defined(OS_LINUX) && !defined(OS_CHROMEOS) |
| return false; |
| #else |
| return true; |
| #endif |
| } |
| |
| // Creates a widget of type TYPE_TOOLTIP |
| views::Widget* CreateTooltipWidget(aura::Window* tooltip_window, |
| const gfx::Rect& bounds) { |
| views::Widget* widget = new views::Widget; |
| views::Widget::InitParams params; |
| // For aura, since we set the type to TYPE_TOOLTIP, the widget will get |
| // auto-parented to the right container. |
| params.type = views::Widget::InitParams::TYPE_TOOLTIP; |
| params.context = tooltip_window; |
| DCHECK(params.context); |
| params.keep_on_top = true; |
| params.accept_events = false; |
| params.bounds = bounds; |
| if (CanUseTranslucentTooltipWidget()) |
| params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW; |
| params.shadow_type = views::Widget::InitParams::SHADOW_TYPE_NONE; |
| widget->Init(params); |
| return widget; |
| } |
| |
| } // namespace |
| |
| namespace views { |
| namespace corewm { |
| |
| // TODO(oshima): Consider to use views::Label. |
| class TooltipAura::TooltipView : public views::View { |
| public: |
| TooltipView() |
| : render_text_(gfx::RenderText::CreateHarfBuzzInstance()), max_width_(0) { |
| const int kHorizontalPadding = 8; |
| const int kVerticalPaddingTop = 4; |
| const int kVerticalPaddingBottom = 5; |
| SetBorder(CreateEmptyBorder(kVerticalPaddingTop, kHorizontalPadding, |
| kVerticalPaddingBottom, kHorizontalPadding)); |
| |
| set_owned_by_client(); |
| render_text_->SetWordWrapBehavior(gfx::WRAP_LONG_WORDS); |
| render_text_->SetMultiline(true); |
| |
| ResetDisplayRect(); |
| } |
| |
| ~TooltipView() override {} |
| |
| // views:View: |
| void OnPaint(gfx::Canvas* canvas) override { |
| OnPaintBackground(canvas); |
| gfx::Size text_size = size(); |
| gfx::Insets insets = border()->GetInsets(); |
| text_size.Enlarge(-insets.width(), -insets.height()); |
| render_text_->SetDisplayRect(gfx::Rect(text_size)); |
| canvas->Save(); |
| canvas->Translate(gfx::Vector2d(insets.left(), insets.top())); |
| render_text_->Draw(canvas); |
| canvas->Restore(); |
| OnPaintBorder(canvas); |
| } |
| |
| gfx::Size CalculatePreferredSize() const override { |
| gfx::Size view_size = render_text_->GetStringSize(); |
| gfx::Insets insets = border()->GetInsets(); |
| view_size.Enlarge(insets.width(), insets.height()); |
| return view_size; |
| } |
| |
| const char* GetClassName() const override { |
| return "TooltipView"; |
| } |
| |
| void SetText(const base::string16& text) { |
| render_text_->SetHorizontalAlignment(gfx::ALIGN_TO_HEAD); |
| render_text_->SetText(text); |
| SchedulePaint(); |
| } |
| |
| void SetForegroundColor(SkColor color) { |
| render_text_->SetColor(color); |
| } |
| |
| void SetBackgroundColor(SkColor background_color) { |
| // Corner radius of tooltip background. |
| const float kTooltipCornerRadius = 2.f; |
| SetBackground(CanUseTranslucentTooltipWidget() |
| ? views::CreateBackgroundFromPainter( |
| views::Painter::CreateSolidRoundRectPainter( |
| background_color, kTooltipCornerRadius)) |
| : views::CreateSolidBackground(background_color)); |
| |
| // Force the text color to be readable when |background_color| is not |
| // opaque. |
| render_text_->set_subpixel_rendering_suppressed( |
| SkColorGetA(background_color) != 0xFF); |
| } |
| |
| void SetMaxWidth(int width) { |
| max_width_ = width; |
| ResetDisplayRect(); |
| } |
| |
| gfx::RenderText* render_text_for_test() { return render_text_.get(); } |
| |
| private: |
| void ResetDisplayRect() { |
| render_text_->SetDisplayRect(gfx::Rect(0, 0, max_width_, 100000)); |
| } |
| |
| std::unique_ptr<gfx::RenderText> render_text_; |
| int max_width_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TooltipView); |
| }; |
| |
| TooltipAura::TooltipAura() |
| : tooltip_view_(new TooltipView), |
| widget_(NULL), |
| tooltip_window_(NULL) { |
| } |
| |
| TooltipAura::~TooltipAura() { |
| DestroyWidget(); |
| } |
| |
| gfx::RenderText* TooltipAura::GetRenderTextForTest() { |
| return tooltip_view_->render_text_for_test(); |
| } |
| |
| gfx::Rect TooltipAura::GetTooltipBounds(const gfx::Point& mouse_pos, |
| const gfx::Size& tooltip_size) { |
| gfx::Rect tooltip_rect(mouse_pos, tooltip_size); |
| tooltip_rect.Offset(kCursorOffsetX, kCursorOffsetY); |
| display::Screen* screen = display::Screen::GetScreen(); |
| gfx::Rect display_bounds(screen->GetDisplayNearestPoint(mouse_pos).bounds()); |
| |
| // If tooltip is out of bounds on the x axis, we simply shift it |
| // horizontally by the offset. |
| if (tooltip_rect.right() > display_bounds.right()) { |
| int h_offset = tooltip_rect.right() - display_bounds.right(); |
| tooltip_rect.Offset(-h_offset, 0); |
| } |
| |
| // If tooltip is out of bounds on the y axis, we flip it to appear above the |
| // mouse cursor instead of below. |
| if (tooltip_rect.bottom() > display_bounds.bottom()) |
| tooltip_rect.set_y(mouse_pos.y() - tooltip_size.height()); |
| |
| tooltip_rect.AdjustToFit(display_bounds); |
| return tooltip_rect; |
| } |
| |
| void TooltipAura::DestroyWidget() { |
| if (widget_) { |
| widget_->RemoveObserver(this); |
| widget_->Close(); |
| widget_ = NULL; |
| } |
| } |
| |
| int TooltipAura::GetMaxWidth(const gfx::Point& location) const { |
| display::Screen* screen = display::Screen::GetScreen(); |
| gfx::Rect display_bounds(screen->GetDisplayNearestPoint(location).bounds()); |
| return std::min(kTooltipMaxWidthPixels, (display_bounds.width() + 1) / 2); |
| } |
| |
| void TooltipAura::SetText(aura::Window* window, |
| const base::string16& tooltip_text, |
| const gfx::Point& location) { |
| tooltip_window_ = window; |
| tooltip_view_->SetMaxWidth(GetMaxWidth(location)); |
| tooltip_view_->SetText(tooltip_text); |
| |
| const gfx::Rect adjusted_bounds = |
| GetTooltipBounds(location, tooltip_view_->GetPreferredSize()); |
| |
| if (!widget_) { |
| widget_ = CreateTooltipWidget(tooltip_window_, adjusted_bounds); |
| widget_->SetContentsView(tooltip_view_.get()); |
| widget_->AddObserver(this); |
| } else { |
| widget_->SetBounds(adjusted_bounds); |
| } |
| |
| ui::NativeTheme* native_theme = widget_->GetNativeTheme(); |
| tooltip_view_->SetBackgroundColor(native_theme->GetSystemColor( |
| ui::NativeTheme::kColorId_TooltipBackground)); |
| tooltip_view_->SetForegroundColor(native_theme->GetSystemColor( |
| ui::NativeTheme::kColorId_TooltipText)); |
| } |
| |
| void TooltipAura::Show() { |
| if (widget_) { |
| widget_->Show(); |
| widget_->StackAtTop(); |
| } |
| } |
| |
| void TooltipAura::Hide() { |
| tooltip_window_ = NULL; |
| if (widget_) |
| widget_->Hide(); |
| } |
| |
| bool TooltipAura::IsVisible() { |
| return widget_ && widget_->IsVisible(); |
| } |
| |
| void TooltipAura::OnWidgetDestroying(views::Widget* widget) { |
| DCHECK_EQ(widget_, widget); |
| widget_ = NULL; |
| tooltip_window_ = NULL; |
| } |
| |
| } // namespace corewm |
| } // namespace views |