// Copyright (c) 2012 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 "ash/wm/window_resizer.h" #include "ash/public/cpp/presentation_time_recorder.h" #include "ash/wm/window_positioning_utils.h" #include "ash/wm/window_state.h" #include "ash/wm/window_util.h" #include "base/bind.h" #include "base/metrics/histogram_macros.h" #include "base/numerics/safe_conversions.h" #include "base/time/time.h" #include "chromeos/ui/frame/frame_header.h" #include "ui/aura/client/aura_constants.h" #include "ui/aura/window.h" #include "ui/aura/window_delegate.h" #include "ui/aura/window_tree_host.h" #include "ui/base/hit_test.h" #include "ui/base/ui_base_types.h" #include "ui/compositor/compositor.h" #include "ui/compositor/layer.h" #include "ui/display/display.h" #include "ui/display/screen.h" #include "ui/gfx/geometry/rect.h" #include "ui/gfx/geometry/resize_utils.h" #include "ui/gfx/presentation_feedback.h" #include "ui/views/widget/widget.h" #include "ui/wm/core/coordinate_conversion.h" namespace ash { namespace { using ::chromeos::FrameHeader; // Returns true for resize components along the right edge, where a drag in // positive x will make the window larger. bool IsRightEdge(int window_component) { return window_component == HTTOPRIGHT || window_component == HTRIGHT || window_component == HTBOTTOMRIGHT || window_component == HTGROWBOX; } bool IsBottomEdge(int window_component) { return window_component == HTBOTTOMLEFT || window_component == HTBOTTOM || window_component == HTBOTTOMRIGHT || window_component == HTGROWBOX; } // Convert |window_component| to the ResizeEdge used in // gfx::SizeRectToAspectRatio(). gfx::ResizeEdge GetWindowResizeEdge(int window_component) { switch (window_component) { case HTBOTTOM: return gfx::ResizeEdge::kBottom; case HTTOP: return gfx::ResizeEdge::kTop; case HTLEFT: return gfx::ResizeEdge::kLeft; case HTRIGHT: return gfx::ResizeEdge::kRight; case HTTOPLEFT: return gfx::ResizeEdge::kTopLeft; case HTTOPRIGHT: return gfx::ResizeEdge::kTopRight; case HTBOTTOMLEFT: return gfx::ResizeEdge::kBottomLeft; case HTBOTTOMRIGHT: return gfx::ResizeEdge::kBottomRight; default: NOTREACHED(); return gfx::ResizeEdge::kBottomRight; } } } // namespace // static const int WindowResizer::kBoundsChange_None = 0; // static const int WindowResizer::kBoundsChange_Repositions = 1; // static const int WindowResizer::kBoundsChange_Resizes = 2; // static const int WindowResizer::kBoundsChangeDirection_None = 0; // static const int WindowResizer::kBoundsChangeDirection_Horizontal = 1; // static const int WindowResizer::kBoundsChangeDirection_Vertical = 2; WindowResizer::WindowResizer(WindowState* window_state) : window_state_(window_state) { DCHECK(window_state_->drag_details()); } WindowResizer::~WindowResizer() = default; // static int WindowResizer::GetBoundsChangeForWindowComponent(int component) { int bounds_change = WindowResizer::kBoundsChange_None; switch (component) { case HTTOPLEFT: case HTTOP: case HTTOPRIGHT: case HTLEFT: case HTBOTTOMLEFT: bounds_change |= WindowResizer::kBoundsChange_Repositions | WindowResizer::kBoundsChange_Resizes; break; case HTCAPTION: bounds_change |= WindowResizer::kBoundsChange_Repositions; break; case HTRIGHT: case HTBOTTOMRIGHT: case HTBOTTOM: case HTGROWBOX: bounds_change |= WindowResizer::kBoundsChange_Resizes; break; default: break; } return bounds_change; } // static int WindowResizer::GetPositionChangeDirectionForWindowComponent( int window_component) { int pos_change_direction = WindowResizer::kBoundsChangeDirection_None; switch (window_component) { case HTTOPLEFT: case HTBOTTOMRIGHT: case HTGROWBOX: case HTCAPTION: pos_change_direction |= WindowResizer::kBoundsChangeDirection_Horizontal | WindowResizer::kBoundsChangeDirection_Vertical; break; case HTTOP: case HTTOPRIGHT: case HTBOTTOM: pos_change_direction |= WindowResizer::kBoundsChangeDirection_Vertical; break; case HTBOTTOMLEFT: case HTRIGHT: case HTLEFT: pos_change_direction |= WindowResizer::kBoundsChangeDirection_Horizontal; break; default: break; } return pos_change_direction; } aura::Window* WindowResizer::GetTarget() const { return window_state_ ? window_state_->window() : nullptr; } gfx::Rect WindowResizer::CalculateBoundsForDrag( const gfx::PointF& passed_location) { if (!details().is_resizable) return details().initial_bounds_in_parent; gfx::PointF location = passed_location; int delta_x = location.x() - details().initial_location_in_parent.x(); int delta_y = location.y() - details().initial_location_in_parent.y(); AdjustDeltaForTouchResize(&delta_x, &delta_y); // The minimize size constraint may limit how much we change the window // position. For example, dragging the left edge to the right should stop // repositioning the window when the minimize size is reached. gfx::Size size = GetSizeForDrag(&delta_x, &delta_y); gfx::Point origin = GetOriginForDrag(delta_x, delta_y, passed_location); gfx::Rect new_bounds(origin, size); gfx::SizeF* aspect_ratio_size = GetTarget()->GetProperty(aura::client::kAspectRatio); if (details().bounds_change & kBoundsChange_Resizes && aspect_ratio_size && !aspect_ratio_size->IsEmpty()) { float aspect_ratio = aspect_ratio_size->width() / aspect_ratio_size->height(); CalculateBoundsWithAspectRatio(aspect_ratio, &new_bounds); return new_bounds; } // Sizing has to keep the result on the screen. Note that this correction // has to come first since it might have an impact on the origin as well as // on the size. if (details().bounds_change & kBoundsChange_Resizes) { gfx::Rect work_area = display::Screen::GetScreen() ->GetDisplayNearestWindow(GetTarget()) .work_area(); ::wm::ConvertRectFromScreen(GetTarget()->parent(), &work_area); if (details().size_change_direction & kBoundsChangeDirection_Horizontal) { if (IsRightEdge(details().window_component) && new_bounds.right() < work_area.x() + kMinimumOnScreenArea) { int delta = work_area.x() + kMinimumOnScreenArea - new_bounds.right(); new_bounds.set_width(new_bounds.width() + delta); } else if (new_bounds.x() > work_area.right() - kMinimumOnScreenArea) { int width = new_bounds.right() - work_area.right() + kMinimumOnScreenArea; new_bounds.set_x(work_area.right() - kMinimumOnScreenArea); new_bounds.set_width(width); } } if (details().size_change_direction & kBoundsChangeDirection_Vertical) { if (!IsBottomEdge(details().window_component) && new_bounds.y() > work_area.bottom() - kMinimumOnScreenArea) { int height = new_bounds.bottom() - work_area.bottom() + kMinimumOnScreenArea; new_bounds.set_y(work_area.bottom() - kMinimumOnScreenArea); new_bounds.set_height(height); } else if (details().window_component == HTBOTTOM || details().window_component == HTBOTTOMRIGHT || details().window_component == HTBOTTOMLEFT) { // Update bottom edge to stay in the work area when we are resizing // by dragging the bottom edge or corners. if (new_bounds.bottom() > work_area.bottom()) new_bounds.Inset(gfx::Insets::TLBR( 0, 0, new_bounds.bottom() - work_area.bottom(), 0)); } } if (details().bounds_change & kBoundsChange_Repositions && new_bounds.y() < 0) { int delta = new_bounds.y(); new_bounds.set_y(0); new_bounds.set_height(new_bounds.height() + delta); } } if (details().bounds_change & kBoundsChange_Repositions) { // Make sure that |new_bounds| doesn't leave any of the displays. Note that // the |work_area| above isn't good for this check since it is the work area // for the current display but the window can move to a different one. aura::Window* parent = GetTarget()->parent(); gfx::PointF passed_location_in_screen(passed_location); ::wm::ConvertPointToScreen(parent, &passed_location_in_screen); gfx::Rect near_passed_location( gfx::ToRoundedPoint(passed_location_in_screen), gfx::Size()); // Use a pointer location (matching the logic in DragWindowResizer) to // calculate the target display after the drag. const display::Display& display = display::Screen::GetScreen()->GetDisplayMatching(near_passed_location); gfx::Rect screen_work_area = display.work_area(); screen_work_area.Inset(gfx::Insets::VH(0, kMinimumOnScreenArea)); gfx::Rect new_bounds_in_screen(new_bounds); ::wm::ConvertRectToScreen(parent, &new_bounds_in_screen); if (!screen_work_area.Intersects(new_bounds_in_screen)) { // Make sure that the x origin does not leave the current display. new_bounds_in_screen.set_x(std::max( screen_work_area.x() - new_bounds.width(), std::min(screen_work_area.right(), new_bounds_in_screen.x()))); new_bounds = new_bounds_in_screen; ::wm::ConvertRectFromScreen(parent, &new_bounds); } } return new_bounds; } void WindowResizer::SetBoundsDuringResize(const gfx::Rect& bounds) { aura::Window* window = GetTarget(); DCHECK(window); auto ptr = weak_ptr_factory_.GetWeakPtr(); const gfx::Size original_size = window->bounds().size(); // Prepare to record presentation time (e.g. tracking Configure). if (recorder_) recorder_->PrepareToRecord(); window->SetBounds(bounds); // Resizer can be destroyed when a window is attached during tab dragging. // crbug.com/970911. if (!ptr) return; // Using `window->bounds()` instead of `bounds` to check size change because // whether "window->SetBounds()" could reject a bounds change. And when that // happens, there might be no new frames presented on screen. if (window->bounds().size() == original_size) return; if (recorder_) recorder_->RequestNext(); } void WindowResizer::SetPresentationTimeRecorder( std::unique_ptr recorder) { recorder_ = std::move(recorder); } void WindowResizer::AdjustDeltaForTouchResize(int* delta_x, int* delta_y) { if (details().source != ::wm::WINDOW_MOVE_SOURCE_TOUCH || !(details().bounds_change & kBoundsChange_Resizes)) return; if (details().size_change_direction & kBoundsChangeDirection_Horizontal) { if (IsRightEdge(details().window_component)) { *delta_x += details().initial_location_in_parent.x() - details().initial_bounds_in_parent.right(); } else { *delta_x += details().initial_location_in_parent.x() - details().initial_bounds_in_parent.x(); } } if (details().size_change_direction & kBoundsChangeDirection_Vertical) { if (IsBottomEdge(details().window_component)) { *delta_y += details().initial_location_in_parent.y() - details().initial_bounds_in_parent.bottom(); } else { *delta_y += details().initial_location_in_parent.y() - details().initial_bounds_in_parent.y(); } } } gfx::Point WindowResizer::GetOriginForDrag(int delta_x, int delta_y, const gfx::PointF& event_location) { gfx::Point origin = details().initial_bounds_in_parent.origin(); if (!(details().bounds_change & kBoundsChange_Repositions)) return origin; int pos_change_direction = GetPositionChangeDirectionForWindowComponent(details().window_component); if (pos_change_direction & kBoundsChangeDirection_Horizontal) origin.Offset(delta_x, 0); if (pos_change_direction & kBoundsChangeDirection_Vertical) origin.Offset(0, delta_y); // If the window gets respoitioned and changes to it's restored bounds, // modify the origin so that the cursor remains within the dragged window. // The ratio of the new origin to the new location should match the ratio // from the initial origin to the initial location. const gfx::Rect restore_bounds = details().restore_bounds_in_parent; if (restore_bounds.IsEmpty()) return origin; // The ratios that should match is the (drag location x - bounds origin x) / // bounds width. const float ratio = (details().initial_location_in_parent.x() - static_cast(details().initial_bounds_in_parent.x())) / details().initial_bounds_in_parent.width(); int new_origin_x = base::ClampRound(event_location.x() - ratio * restore_bounds.width()); origin.set_x(new_origin_x); // Windows may not have a widget in tests. auto* widget = views::Widget::GetWidgetForNativeWindow(GetTarget()); if (!widget) return origin; // |widget| may have a custom frame, |header| will be null in this case. auto* header = FrameHeader::Get(widget); if (!header) return origin; // Compute the available bounds based on the header local bounds. These bounds // are from the previous layout and do not match |restore_bounds| yet. gfx::Rect header_bounds = header->view()->GetLocalBounds(); header_bounds.set_height(header->GetHeaderHeight()); gfx::Rect available_bounds = header_bounds; auto* back_button = header->GetBackButton(); auto* caption_button_container = header->caption_button_container(); if (back_button) available_bounds.Subtract(back_button->bounds()); if (caption_button_container) available_bounds.Subtract(caption_button_container->bounds()); // Calculate the new expected available header left and right bounds. The new // header will still are |new_origin_x| with width |restore_bounds.width()|. // The available region subtracts the control buttons. const int header_left = new_origin_x + (available_bounds.x() - header_bounds.x()); const int header_right = new_origin_x + restore_bounds.width() - (header_bounds.right() - available_bounds.right()); // If |event_location| x falls outside |available_bounds|, shift // |new_origin_x| so that the new window bounds will not land on the any of // the header buttons. int shift = 0; if (event_location.x() > header_right) shift = event_location.x() - header_right; else if (event_location.x() < header_left) shift = event_location.x() - header_left; new_origin_x += shift; origin.set_x(new_origin_x); return origin; } gfx::Size WindowResizer::GetSizeForDrag(int* delta_x, int* delta_y) { gfx::Size size = details().initial_bounds_in_parent.size(); if (details().bounds_change & kBoundsChange_Resizes) { gfx::Size min_size = GetTarget()->delegate() ? GetTarget()->delegate()->GetMinimumSize() : gfx::Size(); size.SetSize(GetWidthForDrag(min_size.width(), delta_x), GetHeightForDrag(min_size.height(), delta_y)); } else if (!details().restore_bounds_in_parent.IsEmpty()) { size = details().restore_bounds_in_parent.size(); } return size; } int WindowResizer::GetWidthForDrag(int min_width, int* delta_x) { int width = details().initial_bounds_in_parent.width(); if (details().size_change_direction & kBoundsChangeDirection_Horizontal) { // Along the right edge, positive delta_x increases the window size. int x_multiplier = IsRightEdge(details().window_component) ? 1 : -1; width += x_multiplier * (*delta_x); // Ensure we don't shrink past the minimum width and clamp delta_x // for the window origin computation. if (width < min_width) { width = min_width; *delta_x = -x_multiplier * (details().initial_bounds_in_parent.width() - min_width); } // And don't let the window go bigger than the display. int max_width = display::Screen::GetScreen() ->GetDisplayNearestWindow(GetTarget()) .bounds() .width(); gfx::Size max_size = GetTarget()->delegate() ? GetTarget()->delegate()->GetMaximumSize() : gfx::Size(); if (max_size.width() != 0) max_width = std::min(max_width, max_size.width()); if (width > max_width) { width = max_width; *delta_x = -x_multiplier * (details().initial_bounds_in_parent.width() - max_width); } } return width; } int WindowResizer::GetHeightForDrag(int min_height, int* delta_y) { int height = details().initial_bounds_in_parent.height(); if (details().size_change_direction & kBoundsChangeDirection_Vertical) { // Along the bottom edge, positive delta_y increases the window size. int y_multiplier = IsBottomEdge(details().window_component) ? 1 : -1; height += y_multiplier * (*delta_y); // Ensure we don't shrink past the minimum height and clamp delta_y // for the window origin computation. if (height < min_height) { height = min_height; *delta_y = -y_multiplier * (details().initial_bounds_in_parent.height() - min_height); } // And don't let the window go bigger than the display. int max_height = display::Screen::GetScreen() ->GetDisplayNearestWindow(GetTarget()) .bounds() .height(); gfx::Size max_size = GetTarget()->delegate() ? GetTarget()->delegate()->GetMaximumSize() : gfx::Size(); if (max_size.height() != 0) max_height = std::min(max_height, max_size.height()); if (height > max_height) { height = max_height; *delta_y = -y_multiplier * (details().initial_bounds_in_parent.height() - max_height); } } return height; } void WindowResizer::CalculateBoundsWithAspectRatio(float aspect_ratio, gfx::Rect* new_bounds) { gfx::Size min_size = GetTarget()->delegate() ? GetTarget()->delegate()->GetMinimumSize() : gfx::Size(); gfx::Size max_size = GetTarget()->delegate() ? GetTarget()->delegate()->GetMaximumSize() : gfx::Size(); DCHECK(!min_size.IsEmpty()); DCHECK(!max_size.IsEmpty()); gfx::SizeRectToAspectRatio(GetWindowResizeEdge(details().window_component), aspect_ratio, min_size, max_size, new_bounds); } } // namespace ash