// Copyright 2012 The Chromium Authors
// 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 <optional>
#include "ash/public/cpp/presentation_time_recorder.h"
#include "ash/wm/window_positioning_utils.h"
#include "ash/wm/window_util.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_macros.h"
#include "base/numerics/safe_conversions.h"
#include "base/time/time.h"
#include "chromeos/ui/frame/caption_buttons/frame_caption_button_container_view.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();
}
}
} // 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.
const 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::SetTransformDuringResize(const gfx::Transform& transform) {
aura::Window* window = GetTarget();
DCHECK(window);
const gfx::Transform original_transform = window->transform();
// Prepare to record presentation time (e.g. tracking Configure).
if (recorder_) {
recorder_->PrepareToRecord();
}
window->SetTransform(transform);
if (window->transform() == original_transform) {
return;
}
if (recorder_) {
recorder_->RequestNext();
}
}
void WindowResizer::SetPresentationTimeRecorder(
std::unique_ptr<PresentationTimeRecorder> 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 repositioned 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. Floated windows do not
// change to their restore bounds while dragging, so we treat them as if they
// had no restore bounds.
const gfx::Rect restore_bounds = details().restore_bounds_in_parent;
if (restore_bounds.IsEmpty() || window_state_->IsFloated())
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<float>(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) const {
gfx::Size size = details().initial_bounds_in_parent.size();
if (details().bounds_change & kBoundsChange_Resizes) {
const 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() &&
!window_state_->IsFloated()) {
// Floated windows remain the same size while dragging regardless of
// restored bounds.
size = details().restore_bounds_in_parent.size();
}
return size;
}
int WindowResizer::GetWidthForDrag(int min_width, int* delta_x) const {
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) const {
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());
// gfx::SizeRectToAspectRatio expects std::nullopt when there is no limit, but
// GetMaximumSize() returns 0x0 when there is no limit.
auto max_size_opt = !max_size.IsEmpty()
? std::make_optional<gfx::Size>(max_size)
: std::nullopt;
gfx::SizeRectToAspectRatio(GetWindowResizeEdge(details().window_component),
aspect_ratio, min_size, max_size_opt, new_bounds);
}
} // namespace ash
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