| // 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/workspace/workspace_window_resizer.h" |
| |
| #include <algorithm> |
| #include <cmath> |
| #include <utility> |
| #include <vector> |
| |
| #include "ash/display/display_controller.h" |
| #include "ash/metrics/user_metrics_recorder.h" |
| #include "ash/root_window_controller.h" |
| #include "ash/screen_util.h" |
| #include "ash/shell.h" |
| #include "ash/shell_window_ids.h" |
| #include "ash/wm/coordinate_conversion.h" |
| #include "ash/wm/default_window_resizer.h" |
| #include "ash/wm/dock/docked_window_layout_manager.h" |
| #include "ash/wm/dock/docked_window_resizer.h" |
| #include "ash/wm/drag_window_resizer.h" |
| #include "ash/wm/panels/panel_window_resizer.h" |
| #include "ash/wm/window_state.h" |
| #include "ash/wm/window_util.h" |
| #include "ash/wm/wm_event.h" |
| #include "ash/wm/workspace/phantom_window_controller.h" |
| #include "ash/wm/workspace/two_step_edge_cycler.h" |
| #include "base/command_line.h" |
| #include "base/memory/weak_ptr.h" |
| #include "ui/aura/client/aura_constants.h" |
| #include "ui/aura/client/screen_position_client.h" |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_delegate.h" |
| #include "ui/aura/window_event_dispatcher.h" |
| #include "ui/base/hit_test.h" |
| #include "ui/compositor/layer.h" |
| #include "ui/gfx/screen.h" |
| #include "ui/gfx/transform.h" |
| #include "ui/wm/core/window_util.h" |
| #include "ui/wm/public/window_types.h" |
| |
| namespace ash { |
| |
| scoped_ptr<WindowResizer> CreateWindowResizer( |
| aura::Window* window, |
| const gfx::Point& point_in_parent, |
| int window_component, |
| aura::client::WindowMoveSource source) { |
| DCHECK(window); |
| wm::WindowState* window_state = wm::GetWindowState(window); |
| // No need to return a resizer when the window cannot get resized or when a |
| // resizer already exists for this window. |
| if ((!window_state->CanResize() && window_component != HTCAPTION) || |
| window_state->drag_details()) { |
| return scoped_ptr<WindowResizer>(); |
| } |
| |
| if (window_component == HTCAPTION && !window_state->can_be_dragged()) |
| return scoped_ptr<WindowResizer>(); |
| |
| // TODO(varkha): The chaining of window resizers causes some of the logic |
| // to be repeated and the logic flow difficult to control. With some windows |
| // classes using reparenting during drag operations it becomes challenging to |
| // implement proper transition from one resizer to another during or at the |
| // end of the drag. This also causes http://crbug.com/247085. |
| // It seems the only thing the panel or dock resizer needs to do is notify the |
| // layout manager when a docked window is being dragged. We should have a |
| // better way of doing this, perhaps by having a way of observing drags or |
| // having a generic drag window wrapper which informs a layout manager that a |
| // drag has started or stopped. |
| // It may be possible to refactor and eliminate chaining. |
| WindowResizer* window_resizer = NULL; |
| |
| if (!window_state->IsNormalOrSnapped()) |
| return scoped_ptr<WindowResizer>(); |
| |
| int bounds_change = WindowResizer::GetBoundsChangeForWindowComponent( |
| window_component); |
| if (bounds_change == WindowResizer::kBoundsChangeDirection_None) |
| return scoped_ptr<WindowResizer>(); |
| |
| window_state->CreateDragDetails(window, point_in_parent, window_component, |
| source); |
| if (window->parent() && |
| (window->parent()->id() == kShellWindowId_DefaultContainer || |
| window->parent()->id() == kShellWindowId_DockedContainer || |
| window->parent()->id() == kShellWindowId_PanelContainer)) { |
| window_resizer = WorkspaceWindowResizer::Create( |
| window_state, std::vector<aura::Window*>()); |
| } else { |
| window_resizer = DefaultWindowResizer::Create(window_state); |
| } |
| window_resizer = DragWindowResizer::Create(window_resizer, window_state); |
| if (window->type() == ui::wm::WINDOW_TYPE_PANEL) |
| window_resizer = PanelWindowResizer::Create(window_resizer, window_state); |
| if (window_resizer && window->parent() && |
| !::wm::GetTransientParent(window) && |
| (window->parent()->id() == kShellWindowId_DefaultContainer || |
| window->parent()->id() == kShellWindowId_DockedContainer || |
| window->parent()->id() == kShellWindowId_PanelContainer)) { |
| window_resizer = DockedWindowResizer::Create(window_resizer, window_state); |
| } |
| return make_scoped_ptr<WindowResizer>(window_resizer); |
| } |
| |
| namespace { |
| |
| // Snapping distance used instead of WorkspaceWindowResizer::kScreenEdgeInset |
| // when resizing a window using touchscreen. |
| const int kScreenEdgeInsetForTouchDrag = 32; |
| |
| // Returns true if the window should stick to the edge. |
| bool ShouldStickToEdge(int distance_from_edge, int sticky_size) { |
| return distance_from_edge < sticky_size && |
| distance_from_edge > -sticky_size * 2; |
| } |
| |
| // Returns the coordinate along the secondary axis to snap to. |
| int CoordinateAlongSecondaryAxis(SecondaryMagnetismEdge edge, |
| int leading, |
| int trailing, |
| int none) { |
| switch (edge) { |
| case SECONDARY_MAGNETISM_EDGE_LEADING: |
| return leading; |
| case SECONDARY_MAGNETISM_EDGE_TRAILING: |
| return trailing; |
| case SECONDARY_MAGNETISM_EDGE_NONE: |
| return none; |
| } |
| NOTREACHED(); |
| return none; |
| } |
| |
| // Returns the origin for |src| when magnetically attaching to |attach_to| along |
| // the edges |edges|. |edges| is a bitmask of the MagnetismEdges. |
| gfx::Point OriginForMagneticAttach(const gfx::Rect& src, |
| const gfx::Rect& attach_to, |
| const MatchedEdge& edge) { |
| int x = 0, y = 0; |
| switch (edge.primary_edge) { |
| case MAGNETISM_EDGE_TOP: |
| y = attach_to.bottom(); |
| break; |
| case MAGNETISM_EDGE_LEFT: |
| x = attach_to.right(); |
| break; |
| case MAGNETISM_EDGE_BOTTOM: |
| y = attach_to.y() - src.height(); |
| break; |
| case MAGNETISM_EDGE_RIGHT: |
| x = attach_to.x() - src.width(); |
| break; |
| } |
| switch (edge.primary_edge) { |
| case MAGNETISM_EDGE_TOP: |
| case MAGNETISM_EDGE_BOTTOM: |
| x = CoordinateAlongSecondaryAxis( |
| edge.secondary_edge, attach_to.x(), attach_to.right() - src.width(), |
| src.x()); |
| break; |
| case MAGNETISM_EDGE_LEFT: |
| case MAGNETISM_EDGE_RIGHT: |
| y = CoordinateAlongSecondaryAxis( |
| edge.secondary_edge, attach_to.y(), attach_to.bottom() - src.height(), |
| src.y()); |
| break; |
| } |
| return gfx::Point(x, y); |
| } |
| |
| // Returns the bounds for a magnetic attach when resizing. |src| is the bounds |
| // of window being resized, |attach_to| the bounds of the window to attach to |
| // and |edge| identifies the edge to attach to. |
| gfx::Rect BoundsForMagneticResizeAttach(const gfx::Rect& src, |
| const gfx::Rect& attach_to, |
| const MatchedEdge& edge) { |
| int x = src.x(); |
| int y = src.y(); |
| int w = src.width(); |
| int h = src.height(); |
| gfx::Point attach_origin(OriginForMagneticAttach(src, attach_to, edge)); |
| switch (edge.primary_edge) { |
| case MAGNETISM_EDGE_LEFT: |
| x = attach_origin.x(); |
| w = src.right() - x; |
| break; |
| case MAGNETISM_EDGE_RIGHT: |
| w += attach_origin.x() - src.x(); |
| break; |
| case MAGNETISM_EDGE_TOP: |
| y = attach_origin.y(); |
| h = src.bottom() - y; |
| break; |
| case MAGNETISM_EDGE_BOTTOM: |
| h += attach_origin.y() - src.y(); |
| break; |
| } |
| switch (edge.primary_edge) { |
| case MAGNETISM_EDGE_LEFT: |
| case MAGNETISM_EDGE_RIGHT: |
| if (edge.secondary_edge == SECONDARY_MAGNETISM_EDGE_LEADING) { |
| y = attach_origin.y(); |
| h = src.bottom() - y; |
| } else if (edge.secondary_edge == SECONDARY_MAGNETISM_EDGE_TRAILING) { |
| h += attach_origin.y() - src.y(); |
| } |
| break; |
| case MAGNETISM_EDGE_TOP: |
| case MAGNETISM_EDGE_BOTTOM: |
| if (edge.secondary_edge == SECONDARY_MAGNETISM_EDGE_LEADING) { |
| x = attach_origin.x(); |
| w = src.right() - x; |
| } else if (edge.secondary_edge == SECONDARY_MAGNETISM_EDGE_TRAILING) { |
| w += attach_origin.x() - src.x(); |
| } |
| break; |
| } |
| return gfx::Rect(x, y, w, h); |
| } |
| |
| // Converts a window component edge to the magnetic edge to snap to. |
| uint32 WindowComponentToMagneticEdge(int window_component) { |
| switch (window_component) { |
| case HTTOPLEFT: |
| return MAGNETISM_EDGE_LEFT | MAGNETISM_EDGE_TOP; |
| case HTTOPRIGHT: |
| return MAGNETISM_EDGE_TOP | MAGNETISM_EDGE_RIGHT; |
| case HTBOTTOMLEFT: |
| return MAGNETISM_EDGE_LEFT | MAGNETISM_EDGE_BOTTOM; |
| case HTBOTTOMRIGHT: |
| return MAGNETISM_EDGE_RIGHT | MAGNETISM_EDGE_BOTTOM; |
| case HTTOP: |
| return MAGNETISM_EDGE_TOP; |
| case HTBOTTOM: |
| return MAGNETISM_EDGE_BOTTOM; |
| case HTRIGHT: |
| return MAGNETISM_EDGE_RIGHT; |
| case HTLEFT: |
| return MAGNETISM_EDGE_LEFT; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| } // namespace |
| |
| // static |
| const int WorkspaceWindowResizer::kMinOnscreenSize = 20; |
| |
| // static |
| const int WorkspaceWindowResizer::kMinOnscreenHeight = 32; |
| |
| // static |
| const int WorkspaceWindowResizer::kScreenEdgeInset = 8; |
| |
| // static |
| WorkspaceWindowResizer* WorkspaceWindowResizer::instance_ = NULL; |
| |
| // Represents the width or height of a window with constraints on its minimum |
| // and maximum size. 0 represents a lack of a constraint. |
| class WindowSize { |
| public: |
| WindowSize(int size, int min, int max) |
| : size_(size), |
| min_(min), |
| max_(max) { |
| // Grow the min/max bounds to include the starting size. |
| if (is_underflowing()) |
| min_ = size_; |
| if (is_overflowing()) |
| max_ = size_; |
| } |
| |
| bool is_at_capacity(bool shrinking) { |
| return size_ == (shrinking ? min_ : max_); |
| } |
| |
| int size() const { |
| return size_; |
| } |
| |
| bool has_min() const { |
| return min_ != 0; |
| } |
| |
| bool has_max() const { |
| return max_ != 0; |
| } |
| |
| bool is_valid() const { |
| return !is_overflowing() && !is_underflowing(); |
| } |
| |
| bool is_overflowing() const { |
| return has_max() && size_ > max_; |
| } |
| |
| bool is_underflowing() const { |
| return has_min() && size_ < min_; |
| } |
| |
| // Add |amount| to this WindowSize not exceeding min or max size constraints. |
| // Returns by how much |size_| + |amount| exceeds the min/max constraints. |
| int Add(int amount) { |
| DCHECK(is_valid()); |
| int new_value = size_ + amount; |
| |
| if (has_min() && new_value < min_) { |
| size_ = min_; |
| return new_value - min_; |
| } |
| |
| if (has_max() && new_value > max_) { |
| size_ = max_; |
| return new_value - max_; |
| } |
| |
| size_ = new_value; |
| return 0; |
| } |
| |
| private: |
| int size_; |
| int min_; |
| int max_; |
| }; |
| |
| WorkspaceWindowResizer::~WorkspaceWindowResizer() { |
| if (did_lock_cursor_) { |
| Shell* shell = Shell::GetInstance(); |
| shell->cursor_manager()->UnlockCursor(); |
| } |
| if (instance_ == this) |
| instance_ = NULL; |
| } |
| |
| // static |
| WorkspaceWindowResizer* WorkspaceWindowResizer::Create( |
| wm::WindowState* window_state, |
| const std::vector<aura::Window*>& attached_windows) { |
| return new WorkspaceWindowResizer(window_state, attached_windows); |
| } |
| |
| void WorkspaceWindowResizer::Drag(const gfx::Point& location_in_parent, |
| int event_flags) { |
| last_mouse_location_ = location_in_parent; |
| |
| int sticky_size; |
| if (event_flags & ui::EF_CONTROL_DOWN) { |
| sticky_size = 0; |
| } else if ((details().bounds_change & kBoundsChange_Resizes) && |
| details().source == aura::client::WINDOW_MOVE_SOURCE_TOUCH) { |
| sticky_size = kScreenEdgeInsetForTouchDrag; |
| } else { |
| sticky_size = kScreenEdgeInset; |
| } |
| // |bounds| is in |GetTarget()->parent()|'s coordinates. |
| gfx::Rect bounds = CalculateBoundsForDrag(location_in_parent); |
| AdjustBoundsForMainWindow(sticky_size, &bounds); |
| |
| if (bounds != GetTarget()->bounds()) { |
| if (!did_move_or_resize_) { |
| if (!details().restore_bounds.IsEmpty()) |
| window_state()->ClearRestoreBounds(); |
| RestackWindows(); |
| } |
| did_move_or_resize_ = true; |
| } |
| |
| gfx::Point location_in_screen = location_in_parent; |
| wm::ConvertPointToScreen(GetTarget()->parent(), &location_in_screen); |
| |
| aura::Window* root = NULL; |
| gfx::Display display = |
| ScreenUtil::FindDisplayContainingPoint(location_in_screen); |
| // Track the last screen that the pointer was on to keep the snap phantom |
| // window there. |
| if (display.is_valid()) { |
| root = Shell::GetInstance()->display_controller()-> |
| GetRootWindowForDisplayId(display.id()); |
| } |
| if (!attached_windows_.empty()) |
| LayoutAttachedWindows(&bounds); |
| if (bounds != GetTarget()->bounds()) { |
| // SetBounds needs to be called to update the layout which affects where the |
| // phantom window is drawn. Keep track if the window was destroyed during |
| // the drag and quit early if so. |
| base::WeakPtr<WorkspaceWindowResizer> resizer( |
| weak_ptr_factory_.GetWeakPtr()); |
| GetTarget()->SetBounds(bounds); |
| if (!resizer) |
| return; |
| } |
| const bool in_original_root = !root || root == GetTarget()->GetRootWindow(); |
| // Hide a phantom window for snapping if the cursor is in another root window. |
| if (in_original_root) { |
| UpdateSnapPhantomWindow(location_in_parent, bounds); |
| } else { |
| snap_type_ = SNAP_NONE; |
| snap_phantom_window_controller_.reset(); |
| edge_cycler_.reset(); |
| SetDraggedWindowDocked(false); |
| } |
| } |
| |
| void WorkspaceWindowResizer::CompleteDrag() { |
| if (!did_move_or_resize_) |
| return; |
| |
| window_state()->set_bounds_changed_by_user(true); |
| snap_phantom_window_controller_.reset(); |
| |
| // If the window's state type changed over the course of the drag do not snap |
| // the window. This happens when the user minimizes or maximizes the window |
| // using a keyboard shortcut while dragging it. |
| if (window_state()->GetStateType() != details().initial_state_type) |
| return; |
| |
| bool snapped = false; |
| if (snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT) { |
| if (!window_state()->HasRestoreBounds()) { |
| gfx::Rect initial_bounds = ScreenUtil::ConvertRectToScreen( |
| GetTarget()->parent(), details().initial_bounds_in_parent); |
| window_state()->SetRestoreBoundsInScreen( |
| details().restore_bounds.IsEmpty() ? |
| initial_bounds : |
| details().restore_bounds); |
| } |
| if (!dock_layout_->is_dragged_window_docked()) { |
| UserMetricsRecorder* metrics = Shell::GetInstance()->metrics(); |
| // TODO(oshima): Add event source type to WMEvent and move |
| // metrics recording inside WindowState::OnWMEvent. |
| const wm::WMEvent event(snap_type_ == SNAP_LEFT ? |
| wm::WM_EVENT_SNAP_LEFT : wm::WM_EVENT_SNAP_RIGHT); |
| window_state()->OnWMEvent(&event); |
| metrics->RecordUserMetricsAction( |
| snap_type_ == SNAP_LEFT ? |
| UMA_DRAG_MAXIMIZE_LEFT : UMA_DRAG_MAXIMIZE_RIGHT); |
| snapped = true; |
| } |
| } |
| |
| if (!snapped && window_state()->IsSnapped()) { |
| // Keep the window snapped if the user resizes the window such that the |
| // window has valid bounds for a snapped window. Always unsnap the window |
| // if the user dragged the window via the caption area because doing this is |
| // slightly less confusing. |
| if (details().window_component == HTCAPTION || |
| !AreBoundsValidSnappedBounds(window_state()->GetStateType(), |
| GetTarget()->bounds())) { |
| // Set the window to WINDOW_STATE_TYPE_NORMAL but keep the |
| // window at the bounds that the user has moved/resized the |
| // window to. ClearRestoreBounds() is used instead of |
| // SaveCurrentBoundsForRestore() because most of the restore |
| // logic is skipped because we are still in the middle of a |
| // drag. TODO(pkotwicz): Fix this and use |
| // SaveCurrentBoundsForRestore(). |
| window_state()->ClearRestoreBounds(); |
| window_state()->Restore(); |
| } |
| } |
| } |
| |
| void WorkspaceWindowResizer::RevertDrag() { |
| window_state()->set_bounds_changed_by_user(initial_bounds_changed_by_user_); |
| snap_phantom_window_controller_.reset(); |
| |
| if (!did_move_or_resize_) |
| return; |
| |
| GetTarget()->SetBounds(details().initial_bounds_in_parent); |
| if (!details().restore_bounds.IsEmpty()) { |
| window_state()->SetRestoreBoundsInScreen(details().restore_bounds); |
| } |
| |
| if (details().window_component == HTRIGHT) { |
| int last_x = details().initial_bounds_in_parent.right(); |
| for (size_t i = 0; i < attached_windows_.size(); ++i) { |
| gfx::Rect bounds(attached_windows_[i]->bounds()); |
| bounds.set_x(last_x); |
| bounds.set_width(initial_size_[i]); |
| attached_windows_[i]->SetBounds(bounds); |
| last_x = attached_windows_[i]->bounds().right(); |
| } |
| } else { |
| int last_y = details().initial_bounds_in_parent.bottom(); |
| for (size_t i = 0; i < attached_windows_.size(); ++i) { |
| gfx::Rect bounds(attached_windows_[i]->bounds()); |
| bounds.set_y(last_y); |
| bounds.set_height(initial_size_[i]); |
| attached_windows_[i]->SetBounds(bounds); |
| last_y = attached_windows_[i]->bounds().bottom(); |
| } |
| } |
| } |
| |
| WorkspaceWindowResizer::WorkspaceWindowResizer( |
| wm::WindowState* window_state, |
| const std::vector<aura::Window*>& attached_windows) |
| : WindowResizer(window_state), |
| attached_windows_(attached_windows), |
| did_lock_cursor_(false), |
| did_move_or_resize_(false), |
| initial_bounds_changed_by_user_(window_state_->bounds_changed_by_user()), |
| total_min_(0), |
| total_initial_size_(0), |
| snap_type_(SNAP_NONE), |
| num_mouse_moves_since_bounds_change_(0), |
| magnetism_window_(NULL), |
| weak_ptr_factory_(this) { |
| DCHECK(details().is_resizable); |
| |
| // A mousemove should still show the cursor even if the window is |
| // being moved or resized with touch, so do not lock the cursor. |
| if (details().source != aura::client::WINDOW_MOVE_SOURCE_TOUCH) { |
| Shell* shell = Shell::GetInstance(); |
| shell->cursor_manager()->LockCursor(); |
| did_lock_cursor_ = true; |
| } |
| |
| aura::Window* dock_container = Shell::GetContainer( |
| GetTarget()->GetRootWindow(), kShellWindowId_DockedContainer); |
| dock_layout_ = static_cast<DockedWindowLayoutManager*>( |
| dock_container->layout_manager()); |
| |
| // Only support attaching to the right/bottom. |
| DCHECK(attached_windows_.empty() || |
| (details().window_component == HTRIGHT || |
| details().window_component == HTBOTTOM)); |
| |
| // TODO: figure out how to deal with window going off the edge. |
| |
| // Calculate sizes so that we can maintain the ratios if we need to resize. |
| int total_available = 0; |
| for (size_t i = 0; i < attached_windows_.size(); ++i) { |
| gfx::Size min(attached_windows_[i]->delegate()->GetMinimumSize()); |
| int initial_size = PrimaryAxisSize(attached_windows_[i]->bounds().size()); |
| initial_size_.push_back(initial_size); |
| // If current size is smaller than the min, use the current size as the min. |
| // This way we don't snap on resize. |
| int min_size = std::min(initial_size, |
| std::max(PrimaryAxisSize(min), kMinOnscreenSize)); |
| total_min_ += min_size; |
| total_initial_size_ += initial_size; |
| total_available += std::max(min_size, initial_size) - min_size; |
| } |
| instance_ = this; |
| } |
| |
| void WorkspaceWindowResizer::LayoutAttachedWindows( |
| gfx::Rect* bounds) { |
| gfx::Rect work_area(ScreenUtil::GetDisplayWorkAreaBoundsInParent( |
| GetTarget())); |
| int initial_size = PrimaryAxisSize(details().initial_bounds_in_parent.size()); |
| int current_size = PrimaryAxisSize(bounds->size()); |
| int start = PrimaryAxisCoordinate(bounds->right(), bounds->bottom()); |
| int end = PrimaryAxisCoordinate(work_area.right(), work_area.bottom()); |
| |
| int delta = current_size - initial_size; |
| int available_size = end - start; |
| std::vector<int> sizes; |
| int leftovers = CalculateAttachedSizes(delta, available_size, &sizes); |
| |
| // leftovers > 0 means that the attached windows can't grow to compensate for |
| // the shrinkage of the main window. This line causes the attached windows to |
| // be moved so they are still flush against the main window, rather than the |
| // main window being prevented from shrinking. |
| leftovers = std::min(0, leftovers); |
| // Reallocate any leftover pixels back into the main window. This is |
| // necessary when, for example, the main window shrinks, but none of the |
| // attached windows can grow without exceeding their max size constraints. |
| // Adding the pixels back to the main window effectively prevents the main |
| // window from resizing too far. |
| if (details().window_component == HTRIGHT) |
| bounds->set_width(bounds->width() + leftovers); |
| else |
| bounds->set_height(bounds->height() + leftovers); |
| |
| DCHECK_EQ(attached_windows_.size(), sizes.size()); |
| int last = PrimaryAxisCoordinate(bounds->right(), bounds->bottom()); |
| for (size_t i = 0; i < attached_windows_.size(); ++i) { |
| gfx::Rect attached_bounds(attached_windows_[i]->bounds()); |
| if (details().window_component == HTRIGHT) { |
| attached_bounds.set_x(last); |
| attached_bounds.set_width(sizes[i]); |
| } else { |
| attached_bounds.set_y(last); |
| attached_bounds.set_height(sizes[i]); |
| } |
| attached_windows_[i]->SetBounds(attached_bounds); |
| last += sizes[i]; |
| } |
| } |
| |
| int WorkspaceWindowResizer::CalculateAttachedSizes( |
| int delta, |
| int available_size, |
| std::vector<int>* sizes) const { |
| std::vector<WindowSize> window_sizes; |
| CreateBucketsForAttached(&window_sizes); |
| |
| // How much we need to grow the attached by (collectively). |
| int grow_attached_by = 0; |
| if (delta > 0) { |
| // If the attached windows don't fit when at their initial size, we will |
| // have to shrink them by how much they overflow. |
| if (total_initial_size_ >= available_size) |
| grow_attached_by = available_size - total_initial_size_; |
| } else { |
| // If we're shrinking, we grow the attached so the total size remains |
| // constant. |
| grow_attached_by = -delta; |
| } |
| |
| int leftover_pixels = 0; |
| while (grow_attached_by != 0) { |
| int leftovers = GrowFairly(grow_attached_by, window_sizes); |
| if (leftovers == grow_attached_by) { |
| leftover_pixels = leftovers; |
| break; |
| } |
| grow_attached_by = leftovers; |
| } |
| |
| for (size_t i = 0; i < window_sizes.size(); ++i) |
| sizes->push_back(window_sizes[i].size()); |
| |
| return leftover_pixels; |
| } |
| |
| int WorkspaceWindowResizer::GrowFairly( |
| int pixels, |
| std::vector<WindowSize>& sizes) const { |
| bool shrinking = pixels < 0; |
| std::vector<WindowSize*> nonfull_windows; |
| for (size_t i = 0; i < sizes.size(); ++i) { |
| if (!sizes[i].is_at_capacity(shrinking)) |
| nonfull_windows.push_back(&sizes[i]); |
| } |
| std::vector<float> ratios; |
| CalculateGrowthRatios(nonfull_windows, &ratios); |
| |
| int remaining_pixels = pixels; |
| bool add_leftover_pixels_to_last = true; |
| for (size_t i = 0; i < nonfull_windows.size(); ++i) { |
| int grow_by = pixels * ratios[i]; |
| // Put any leftover pixels into the last window. |
| if (i == nonfull_windows.size() - 1 && add_leftover_pixels_to_last) |
| grow_by = remaining_pixels; |
| int remainder = nonfull_windows[i]->Add(grow_by); |
| int consumed = grow_by - remainder; |
| remaining_pixels -= consumed; |
| if (nonfull_windows[i]->is_at_capacity(shrinking) && remainder > 0) { |
| // Because this window overflowed, some of the pixels in |
| // |remaining_pixels| aren't there due to rounding errors. Rather than |
| // unfairly giving all those pixels to the last window, we refrain from |
| // allocating them so that this function can be called again to distribute |
| // the pixels fairly. |
| add_leftover_pixels_to_last = false; |
| } |
| } |
| return remaining_pixels; |
| } |
| |
| void WorkspaceWindowResizer::CalculateGrowthRatios( |
| const std::vector<WindowSize*>& sizes, |
| std::vector<float>* out_ratios) const { |
| DCHECK(out_ratios->empty()); |
| int total_value = 0; |
| for (size_t i = 0; i < sizes.size(); ++i) |
| total_value += sizes[i]->size(); |
| |
| for (size_t i = 0; i < sizes.size(); ++i) |
| out_ratios->push_back( |
| (static_cast<float>(sizes[i]->size())) / total_value); |
| } |
| |
| void WorkspaceWindowResizer::CreateBucketsForAttached( |
| std::vector<WindowSize>* sizes) const { |
| for (size_t i = 0; i < attached_windows_.size(); i++) { |
| int initial_size = initial_size_[i]; |
| aura::WindowDelegate* delegate = attached_windows_[i]->delegate(); |
| int min = PrimaryAxisSize(delegate->GetMinimumSize()); |
| int max = PrimaryAxisSize(delegate->GetMaximumSize()); |
| |
| sizes->push_back(WindowSize(initial_size, min, max)); |
| } |
| } |
| |
| void WorkspaceWindowResizer::MagneticallySnapToOtherWindows(gfx::Rect* bounds) { |
| if (UpdateMagnetismWindow(*bounds, kAllMagnetismEdges)) { |
| gfx::Point point = OriginForMagneticAttach( |
| ScreenUtil::ConvertRectToScreen(GetTarget()->parent(), *bounds), |
| magnetism_window_->GetBoundsInScreen(), |
| magnetism_edge_); |
| aura::client::GetScreenPositionClient(GetTarget()->GetRootWindow())-> |
| ConvertPointFromScreen(GetTarget()->parent(), &point); |
| bounds->set_origin(point); |
| } |
| } |
| |
| void WorkspaceWindowResizer::MagneticallySnapResizeToOtherWindows( |
| gfx::Rect* bounds) { |
| const uint32 edges = WindowComponentToMagneticEdge( |
| details().window_component); |
| if (UpdateMagnetismWindow(*bounds, edges)) { |
| *bounds = ScreenUtil::ConvertRectFromScreen( |
| GetTarget()->parent(), |
| BoundsForMagneticResizeAttach( |
| ScreenUtil::ConvertRectToScreen(GetTarget()->parent(), *bounds), |
| magnetism_window_->GetBoundsInScreen(), |
| magnetism_edge_)); |
| } |
| } |
| |
| bool WorkspaceWindowResizer::UpdateMagnetismWindow(const gfx::Rect& bounds, |
| uint32 edges) { |
| // |bounds| are in coordinates of original window's parent. |
| gfx::Rect bounds_in_screen = |
| ScreenUtil::ConvertRectToScreen(GetTarget()->parent(), bounds); |
| MagnetismMatcher matcher(bounds_in_screen, edges); |
| |
| // If we snapped to a window then check it first. That way we don't bounce |
| // around when close to multiple edges. |
| if (magnetism_window_) { |
| if (window_tracker_.Contains(magnetism_window_) && |
| matcher.ShouldAttach(magnetism_window_->GetBoundsInScreen(), |
| &magnetism_edge_)) { |
| return true; |
| } |
| window_tracker_.Remove(magnetism_window_); |
| magnetism_window_ = NULL; |
| } |
| |
| // Avoid magnetically snapping windows that are not resizable. |
| // TODO(oshima): change this to window.type() == TYPE_NORMAL. |
| if (!window_state()->CanResize()) |
| return false; |
| |
| aura::Window::Windows root_windows = Shell::GetAllRootWindows(); |
| for (aura::Window::Windows::iterator iter = root_windows.begin(); |
| iter != root_windows.end(); ++iter) { |
| const aura::Window* root_window = *iter; |
| // Test all children from the desktop in each root window. |
| const aura::Window::Windows& children = Shell::GetContainer( |
| root_window, kShellWindowId_DefaultContainer)->children(); |
| for (aura::Window::Windows::const_reverse_iterator i = children.rbegin(); |
| i != children.rend() && !matcher.AreEdgesObscured(); ++i) { |
| wm::WindowState* other_state = wm::GetWindowState(*i); |
| if (other_state->window() == GetTarget() || |
| !other_state->window()->IsVisible() || |
| !other_state->IsNormalOrSnapped() || |
| !other_state->CanResize()) { |
| continue; |
| } |
| if (matcher.ShouldAttach( |
| other_state->window()->GetBoundsInScreen(), &magnetism_edge_)) { |
| magnetism_window_ = other_state->window(); |
| window_tracker_.Add(magnetism_window_); |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| void WorkspaceWindowResizer::AdjustBoundsForMainWindow( |
| int sticky_size, |
| gfx::Rect* bounds) { |
| gfx::Point last_mouse_location_in_screen = last_mouse_location_; |
| wm::ConvertPointToScreen(GetTarget()->parent(), |
| &last_mouse_location_in_screen); |
| gfx::Display display = Shell::GetScreen()->GetDisplayNearestPoint( |
| last_mouse_location_in_screen); |
| gfx::Rect work_area = |
| ScreenUtil::ConvertRectFromScreen(GetTarget()->parent(), |
| display.work_area()); |
| if (details().window_component == HTCAPTION) { |
| // Adjust the bounds to the work area where the mouse cursor is located. |
| // Always keep kMinOnscreenHeight or the window height (whichever is less) |
| // on the bottom. |
| int max_y = work_area.bottom() - std::min(kMinOnscreenHeight, |
| bounds->height()); |
| if (bounds->y() > max_y) { |
| bounds->set_y(max_y); |
| } else if (bounds->y() <= work_area.y()) { |
| // Don't allow dragging above the top of the display until the mouse |
| // cursor reaches the work area above if any. |
| bounds->set_y(work_area.y()); |
| } |
| |
| if (sticky_size > 0) { |
| // Possibly stick to edge except when a mouse pointer is outside the |
| // work area. |
| if (display.work_area().Contains(last_mouse_location_in_screen)) |
| StickToWorkAreaOnMove(work_area, sticky_size, bounds); |
| MagneticallySnapToOtherWindows(bounds); |
| } |
| } else if (sticky_size > 0) { |
| MagneticallySnapResizeToOtherWindows(bounds); |
| if (!magnetism_window_ && sticky_size > 0) |
| StickToWorkAreaOnResize(work_area, sticky_size, bounds); |
| } |
| |
| if (attached_windows_.empty()) |
| return; |
| |
| if (details().window_component == HTRIGHT) { |
| bounds->set_width(std::min(bounds->width(), |
| work_area.right() - total_min_ - bounds->x())); |
| } else { |
| DCHECK_EQ(HTBOTTOM, details().window_component); |
| bounds->set_height(std::min(bounds->height(), |
| work_area.bottom() - total_min_ - bounds->y())); |
| } |
| } |
| |
| bool WorkspaceWindowResizer::StickToWorkAreaOnMove( |
| const gfx::Rect& work_area, |
| int sticky_size, |
| gfx::Rect* bounds) const { |
| const int left_edge = work_area.x(); |
| const int right_edge = work_area.right(); |
| const int top_edge = work_area.y(); |
| const int bottom_edge = work_area.bottom(); |
| bool updated = false; |
| if (ShouldStickToEdge(bounds->x() - left_edge, sticky_size)) { |
| bounds->set_x(left_edge); |
| updated = true; |
| } else if (ShouldStickToEdge(right_edge - bounds->right(), sticky_size)) { |
| bounds->set_x(right_edge - bounds->width()); |
| updated = true; |
| } |
| if (ShouldStickToEdge(bounds->y() - top_edge, sticky_size)) { |
| bounds->set_y(top_edge); |
| updated = true; |
| } else if (ShouldStickToEdge(bottom_edge - bounds->bottom(), sticky_size) && |
| bounds->height() < (bottom_edge - top_edge)) { |
| // Only snap to the bottom if the window is smaller than the work area. |
| // Doing otherwise can lead to window snapping in weird ways as it bounces |
| // between snapping to top then bottom. |
| bounds->set_y(bottom_edge - bounds->height()); |
| updated = true; |
| } |
| return updated; |
| } |
| |
| void WorkspaceWindowResizer::StickToWorkAreaOnResize( |
| const gfx::Rect& work_area, |
| int sticky_size, |
| gfx::Rect* bounds) const { |
| const uint32 edges = WindowComponentToMagneticEdge( |
| details().window_component); |
| const int left_edge = work_area.x(); |
| const int right_edge = work_area.right(); |
| const int top_edge = work_area.y(); |
| const int bottom_edge = work_area.bottom(); |
| if (edges & MAGNETISM_EDGE_TOP && |
| ShouldStickToEdge(bounds->y() - top_edge, sticky_size)) { |
| bounds->set_height(bounds->bottom() - top_edge); |
| bounds->set_y(top_edge); |
| } |
| if (edges & MAGNETISM_EDGE_LEFT && |
| ShouldStickToEdge(bounds->x() - left_edge, sticky_size)) { |
| bounds->set_width(bounds->right() - left_edge); |
| bounds->set_x(left_edge); |
| } |
| if (edges & MAGNETISM_EDGE_BOTTOM && |
| ShouldStickToEdge(bottom_edge - bounds->bottom(), sticky_size)) { |
| bounds->set_height(bottom_edge - bounds->y()); |
| } |
| if (edges & MAGNETISM_EDGE_RIGHT && |
| ShouldStickToEdge(right_edge - bounds->right(), sticky_size)) { |
| bounds->set_width(right_edge - bounds->x()); |
| } |
| } |
| |
| int WorkspaceWindowResizer::PrimaryAxisSize(const gfx::Size& size) const { |
| return PrimaryAxisCoordinate(size.width(), size.height()); |
| } |
| |
| int WorkspaceWindowResizer::PrimaryAxisCoordinate(int x, int y) const { |
| switch (details().window_component) { |
| case HTRIGHT: |
| return x; |
| case HTBOTTOM: |
| return y; |
| default: |
| NOTREACHED(); |
| } |
| return 0; |
| } |
| |
| void WorkspaceWindowResizer::UpdateSnapPhantomWindow(const gfx::Point& location, |
| const gfx::Rect& bounds) { |
| if (!did_move_or_resize_ || details().window_component != HTCAPTION) |
| return; |
| |
| SnapType last_type = snap_type_; |
| snap_type_ = GetSnapType(location); |
| if (snap_type_ == SNAP_NONE || snap_type_ != last_type) { |
| snap_phantom_window_controller_.reset(); |
| edge_cycler_.reset(); |
| if (snap_type_ == SNAP_NONE) { |
| SetDraggedWindowDocked(false); |
| return; |
| } |
| } |
| |
| DCHECK(snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT); |
| DockedAlignment desired_alignment = (snap_type_ == SNAP_LEFT) ? |
| DOCKED_ALIGNMENT_LEFT : DOCKED_ALIGNMENT_RIGHT; |
| const bool can_dock = |
| dock_layout_->CanDockWindow(GetTarget(), desired_alignment) && |
| dock_layout_->GetAlignmentOfWindow(GetTarget()) != DOCKED_ALIGNMENT_NONE; |
| if (!can_dock) { |
| // If the window cannot be docked, undock the window. This may change the |
| // workspace bounds and hence |snap_type_|. |
| SetDraggedWindowDocked(false); |
| snap_type_ = GetSnapType(location); |
| } |
| const bool can_snap = snap_type_ != SNAP_NONE && window_state()->CanSnap(); |
| if (!can_snap && !can_dock) { |
| snap_type_ = SNAP_NONE; |
| snap_phantom_window_controller_.reset(); |
| edge_cycler_.reset(); |
| return; |
| } |
| if (!edge_cycler_) |
| edge_cycler_.reset(new TwoStepEdgeCycler(location)); |
| else |
| edge_cycler_->OnMove(location); |
| |
| // Update phantom window with snapped or docked guide bounds. |
| // Windows that cannot be snapped or are less wide than kMaxDockWidth can get |
| // docked without going through a snapping sequence. |
| gfx::Rect phantom_bounds; |
| const bool should_dock = can_dock && |
| (!can_snap || |
| GetTarget()->bounds().width() <= |
| DockedWindowLayoutManager::kMaxDockWidth || |
| edge_cycler_->use_second_mode() || |
| dock_layout_->is_dragged_window_docked()); |
| if (should_dock) { |
| SetDraggedWindowDocked(true); |
| phantom_bounds = ScreenUtil::ConvertRectFromScreen( |
| GetTarget()->parent(), dock_layout_->dragged_bounds()); |
| } else { |
| phantom_bounds = (snap_type_ == SNAP_LEFT) ? |
| wm::GetDefaultLeftSnappedWindowBoundsInParent(GetTarget()) : |
| wm::GetDefaultRightSnappedWindowBoundsInParent(GetTarget()); |
| } |
| |
| if (!snap_phantom_window_controller_) { |
| snap_phantom_window_controller_.reset( |
| new PhantomWindowController(GetTarget())); |
| } |
| snap_phantom_window_controller_->Show(ScreenUtil::ConvertRectToScreen( |
| GetTarget()->parent(), phantom_bounds)); |
| } |
| |
| void WorkspaceWindowResizer::RestackWindows() { |
| if (attached_windows_.empty()) |
| return; |
| // Build a map from index in children to window, returning if there is a |
| // window with a different parent. |
| typedef std::map<size_t, aura::Window*> IndexToWindowMap; |
| IndexToWindowMap map; |
| aura::Window* parent = GetTarget()->parent(); |
| const aura::Window::Windows& windows(parent->children()); |
| map[std::find(windows.begin(), windows.end(), GetTarget()) - |
| windows.begin()] = GetTarget(); |
| for (std::vector<aura::Window*>::const_iterator i = |
| attached_windows_.begin(); i != attached_windows_.end(); ++i) { |
| if ((*i)->parent() != parent) |
| return; |
| size_t index = |
| std::find(windows.begin(), windows.end(), *i) - windows.begin(); |
| map[index] = *i; |
| } |
| |
| // Reorder the windows starting at the topmost. |
| parent->StackChildAtTop(map.rbegin()->second); |
| for (IndexToWindowMap::const_reverse_iterator i = map.rbegin(); |
| i != map.rend(); ) { |
| aura::Window* window = i->second; |
| ++i; |
| if (i != map.rend()) |
| parent->StackChildBelow(i->second, window); |
| } |
| } |
| |
| WorkspaceWindowResizer::SnapType WorkspaceWindowResizer::GetSnapType( |
| const gfx::Point& location) const { |
| // TODO: this likely only wants total display area, not the area of a single |
| // display. |
| gfx::Rect area(ScreenUtil::GetDisplayWorkAreaBoundsInParent(GetTarget())); |
| if (details().source == aura::client::WINDOW_MOVE_SOURCE_TOUCH) { |
| // Increase tolerance for touch-snapping near the screen edges. This is only |
| // necessary when the work area left or right edge is same as screen edge. |
| gfx::Rect display_bounds(ScreenUtil::GetDisplayBoundsInParent(GetTarget())); |
| int inset_left = 0; |
| if (area.x() == display_bounds.x()) |
| inset_left = kScreenEdgeInsetForTouchDrag; |
| int inset_right = 0; |
| if (area.right() == display_bounds.right()) |
| inset_right = kScreenEdgeInsetForTouchDrag; |
| area.Inset(inset_left, 0, inset_right, 0); |
| } |
| if (location.x() <= area.x()) |
| return SNAP_LEFT; |
| if (location.x() >= area.right() - 1) |
| return SNAP_RIGHT; |
| return SNAP_NONE; |
| } |
| |
| void WorkspaceWindowResizer::SetDraggedWindowDocked(bool should_dock) { |
| if (should_dock) { |
| if (!dock_layout_->is_dragged_window_docked()) { |
| window_state()->set_bounds_changed_by_user(false); |
| dock_layout_->DockDraggedWindow(GetTarget()); |
| } |
| } else { |
| if (dock_layout_->is_dragged_window_docked()) { |
| dock_layout_->UndockDraggedWindow(); |
| window_state()->set_bounds_changed_by_user(true); |
| } |
| } |
| } |
| |
| bool WorkspaceWindowResizer::AreBoundsValidSnappedBounds( |
| wm::WindowStateType snapped_type, |
| const gfx::Rect& bounds_in_parent) const { |
| DCHECK(snapped_type == wm::WINDOW_STATE_TYPE_LEFT_SNAPPED || |
| snapped_type == wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED); |
| gfx::Rect snapped_bounds = ScreenUtil::GetDisplayWorkAreaBoundsInParent( |
| GetTarget()); |
| if (snapped_type == wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED) |
| snapped_bounds.set_x(snapped_bounds.right() - bounds_in_parent.width()); |
| snapped_bounds.set_width(bounds_in_parent.width()); |
| return bounds_in_parent == snapped_bounds; |
| } |
| |
| } // namespace ash |