| // 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/ash_switches.h" |
| #include "ash/display/display_controller.h" |
| #include "ash/root_window_controller.h" |
| #include "ash/screen_ash.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/workspace/phantom_window_controller.h" |
| #include "ash/wm/workspace/snap_sizer.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/client/window_types.h" |
| #include "ui/aura/root_window.h" |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_delegate.h" |
| #include "ui/base/hit_test.h" |
| #include "ui/compositor/layer.h" |
| #include "ui/gfx/screen.h" |
| #include "ui/gfx/transform.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->window_resizer()) { |
| 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->parent() && |
| (window->parent()->id() == internal::kShellWindowId_DefaultContainer || |
| window->parent()->id() == internal::kShellWindowId_DockedContainer || |
| window->parent()->id() == internal::kShellWindowId_PanelContainer)) { |
| // Allow dragging maximized windows if it's not tracked by workspace. This |
| // is set by tab dragging code. |
| if (!window_state->IsNormalShowState() && |
| (window_component != HTCAPTION || |
| window_state->tracked_by_workspace())) { |
| return scoped_ptr<WindowResizer>(); |
| } |
| window_resizer = internal::WorkspaceWindowResizer::Create( |
| window, |
| point_in_parent, |
| window_component, |
| source, |
| std::vector<aura::Window*>()); |
| } else if (window_state->IsNormalShowState()) { |
| window_resizer = DefaultWindowResizer::Create( |
| window, point_in_parent, window_component, source); |
| } |
| if (window_resizer) { |
| window_resizer = internal::DragWindowResizer::Create( |
| window_resizer, window, point_in_parent, window_component, source); |
| } |
| if (window_resizer && window->type() == aura::client::WINDOW_TYPE_PANEL) { |
| window_resizer = PanelWindowResizer::Create( |
| window_resizer, window, point_in_parent, window_component, source); |
| } |
| if (CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kAshEnableDockedWindows) && |
| window_resizer && window->parent() && |
| !window->transient_parent() && |
| (window->parent()->id() == internal::kShellWindowId_DefaultContainer || |
| window->parent()->id() == internal::kShellWindowId_DockedContainer || |
| window->parent()->id() == internal::kShellWindowId_PanelContainer)) { |
| window_resizer = internal::DockedWindowResizer::Create( |
| window_resizer, window, point_in_parent, window_component, source); |
| } |
| window_state->set_window_resizer_(window_resizer); |
| return make_scoped_ptr<WindowResizer>(window_resizer); |
| } |
| |
| namespace internal { |
| |
| namespace { |
| |
| // Snapping distance used instead of WorkspaceWindowResizer::kScreenEdgeInset |
| // when resizing a window using touchscreen. |
| const int kScreenEdgeInsetForTouchResize = 32; |
| |
| // Returns true if the window should stick to the edge. |
| bool ShouldStickToEdge(int distance_from_edge, int sticky_size) { |
| if (CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kAshEnableStickyEdges) || |
| CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kAshEnableDockedWindows)) { |
| return distance_from_edge < 0 && |
| distance_from_edge > -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 |
| const int WorkspaceWindowResizer::kStickyDistancePixels = 64; |
| |
| // 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() { |
| Shell* shell = Shell::GetInstance(); |
| shell->cursor_manager()->UnlockCursor(); |
| } |
| |
| // static |
| WorkspaceWindowResizer* WorkspaceWindowResizer::Create( |
| aura::Window* window, |
| const gfx::Point& location_in_parent, |
| int window_component, |
| aura::client::WindowMoveSource source, |
| const std::vector<aura::Window*>& attached_windows) { |
| Details details(window, location_in_parent, window_component, source); |
| return details.is_resizable ? |
| new WorkspaceWindowResizer(details, attached_windows) : NULL; |
| } |
| |
| 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 (CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kAshEnableStickyEdges) || |
| CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kAshEnableDockedWindows)) { |
| sticky_size = kStickyDistancePixels; |
| } else if ((details_.bounds_change & kBoundsChange_Resizes) && |
| details_.source == aura::client::WINDOW_MOVE_SOURCE_TOUCH) { |
| sticky_size = kScreenEdgeInsetForTouchResize; |
| } else { |
| sticky_size = kScreenEdgeInset; |
| } |
| // |bounds| is in |window()->parent()|'s coordinates. |
| gfx::Rect bounds = CalculateBoundsForDrag(details_, location_in_parent); |
| if (window_state()->IsNormalShowState()) |
| AdjustBoundsForMainWindow(sticky_size, &bounds); |
| |
| if (bounds != window()->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(window()->parent(), &location_in_screen); |
| |
| aura::Window* root = NULL; |
| gfx::Display display = |
| ScreenAsh::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 != window()->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()); |
| window()->SetBounds(bounds); |
| if (!resizer) |
| return; |
| } |
| const bool in_original_root = !root || root == window()->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(); |
| snap_sizer_.reset(); |
| SetDraggedWindowDocked(false); |
| } |
| } |
| |
| void WorkspaceWindowResizer::CompleteDrag(int event_flags) { |
| window_state()->set_bounds_changed_by_user(true); |
| snap_phantom_window_controller_.reset(); |
| if (!did_move_or_resize_ || details_.window_component != HTCAPTION) |
| return; |
| |
| // When the window is not in the normal show state, we do not snap the window. |
| // This happens when the user minimizes or maximizes the window by keyboard |
| // shortcut while dragging it. If the window is the result of dragging a tab |
| // out of a maximized window, it's already in the normal show state when this |
| // is called, so it does not matter. |
| if (window_state()->IsNormalShowState() && |
| (window()->type() != aura::client::WINDOW_TYPE_PANEL || |
| !window_state()->panel_attached() || |
| dock_layout_->is_dragged_window_docked()) && |
| (snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT)) { |
| if (!window_state()->HasRestoreBounds()) { |
| gfx::Rect initial_bounds = ScreenAsh::ConvertRectToScreen( |
| window()->parent(), details_.initial_bounds_in_parent); |
| window_state()->SetRestoreBoundsInScreen( |
| details_.restore_bounds.IsEmpty() ? |
| initial_bounds : |
| details_.restore_bounds); |
| } |
| DCHECK(snap_sizer_); |
| if (window_state()->CanResize() && |
| !dock_layout_->is_dragged_window_docked()) { |
| snap_sizer_->SnapWindowToTargetBounds(); |
| } |
| } |
| } |
| |
| void WorkspaceWindowResizer::RevertDrag() { |
| snap_phantom_window_controller_.reset(); |
| |
| if (!did_move_or_resize_) |
| return; |
| |
| window()->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(); |
| } |
| } |
| } |
| |
| aura::Window* WorkspaceWindowResizer::GetTarget() { |
| return details_.window; |
| } |
| |
| const gfx::Point& WorkspaceWindowResizer::GetInitialLocation() const { |
| return details_.initial_location_in_parent; |
| } |
| |
| WorkspaceWindowResizer::WorkspaceWindowResizer( |
| const Details& details, |
| const std::vector<aura::Window*>& attached_windows) |
| : details_(details), |
| attached_windows_(attached_windows), |
| did_move_or_resize_(false), |
| 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); |
| |
| Shell* shell = Shell::GetInstance(); |
| shell->cursor_manager()->LockCursor(); |
| |
| aura::Window* dock_container = Shell::GetContainer( |
| window()->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; |
| } |
| } |
| |
| gfx::Rect WorkspaceWindowResizer::GetFinalBounds( |
| const gfx::Rect& bounds) const { |
| if (snap_phantom_window_controller_.get() && |
| snap_phantom_window_controller_->IsShowing()) { |
| return snap_phantom_window_controller_->bounds_in_screen(); |
| } |
| return bounds; |
| } |
| |
| void WorkspaceWindowResizer::LayoutAttachedWindows( |
| gfx::Rect* bounds) { |
| gfx::Rect work_area(ScreenAsh::GetDisplayWorkAreaBoundsInParent(window())); |
| 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( |
| ScreenAsh::ConvertRectToScreen(window()->parent(), *bounds), |
| magnetism_window_->GetBoundsInScreen(), |
| magnetism_edge_); |
| aura::client::GetScreenPositionClient(window()->GetRootWindow())-> |
| ConvertPointFromScreen(window()->parent(), &point); |
| bounds->set_origin(point); |
| } |
| } |
| |
| void WorkspaceWindowResizer::MagneticallySnapResizeToOtherWindows( |
| gfx::Rect* bounds) { |
| const uint32 edges = WindowComponentToMagneticEdge(details_.window_component); |
| if (UpdateMagnetismWindow(*bounds, edges)) { |
| *bounds = ScreenAsh::ConvertRectFromScreen( |
| window()->parent(), |
| BoundsForMagneticResizeAttach( |
| ScreenAsh::ConvertRectToScreen(window()->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 = |
| ScreenAsh::ConvertRectToScreen(window()->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 to popups, menus, tooltips, controls and |
| // windows that are not tracked by workspace. |
| if (!window_state()->CanResize() || !window_state()->tracked_by_workspace()) |
| return false; |
| |
| Shell::RootWindowList root_windows = Shell::GetAllRootWindows(); |
| for (Shell::RootWindowList::iterator iter = root_windows.begin(); |
| iter != root_windows.end(); ++iter) { |
| const aura::RootWindow* 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() == window() || |
| !other_state->window()->IsVisible() || |
| !other_state->IsNormalShowState() || |
| !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(window()->parent(), &last_mouse_location_in_screen); |
| gfx::Display display = Shell::GetScreen()->GetDisplayNearestPoint( |
| last_mouse_location_in_screen); |
| gfx::Rect work_area = |
| ScreenAsh::ConvertRectFromScreen(window()->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(); |
| snap_sizer_.reset(); |
| if (snap_type_ == SNAP_NONE) { |
| SetDraggedWindowDocked(false); |
| return; |
| } |
| } |
| const bool can_dock = dock_layout_->CanDockWindow(window(), snap_type_); |
| const bool can_snap = window_state()->CanSnap(); |
| if (!can_snap && !can_dock) { |
| snap_type_ = SNAP_NONE; |
| snap_phantom_window_controller_.reset(); |
| snap_sizer_.reset(); |
| SetDraggedWindowDocked(false); |
| return; |
| } |
| SnapSizer::Edge edge = (snap_type_ == SNAP_LEFT) ? |
| SnapSizer::LEFT_EDGE : SnapSizer::RIGHT_EDGE; |
| if (!snap_sizer_) { |
| snap_sizer_.reset(new SnapSizer(window_state(), |
| location, |
| edge, |
| internal::SnapSizer::OTHER_INPUT)); |
| } else { |
| snap_sizer_->Update(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; |
| if (can_snap && |
| (!can_dock || |
| window()->bounds().width() > DockedWindowLayoutManager::kMaxDockWidth)) |
| phantom_bounds = snap_sizer_->target_bounds(); |
| const bool should_dock = can_dock && |
| (phantom_bounds.IsEmpty() || |
| snap_sizer_->end_of_sequence() || |
| dock_layout_->is_dragged_window_docked()); |
| SetDraggedWindowDocked(should_dock); |
| snap_type_ = GetSnapType(location); |
| if (dock_layout_->is_dragged_window_docked()) { |
| phantom_bounds = ScreenAsh::ConvertRectFromScreen( |
| window()->parent(), dock_layout_->dragged_bounds()); |
| } |
| |
| if (phantom_bounds.IsEmpty()) { |
| snap_phantom_window_controller_.reset(); |
| return; |
| } |
| |
| if (!snap_phantom_window_controller_) { |
| snap_phantom_window_controller_.reset( |
| new PhantomWindowController(window())); |
| } |
| snap_phantom_window_controller_->Show(ScreenAsh::ConvertRectToScreen( |
| window()->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 = window()->parent(); |
| const aura::Window::Windows& windows(parent->children()); |
| map[std::find(windows.begin(), windows.end(), window()) - |
| windows.begin()] = window(); |
| 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); |
| } |
| } |
| |
| 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(ScreenAsh::GetDisplayWorkAreaBoundsInParent(window())); |
| 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 && |
| dock_layout_->GetAlignmentOfWindow(window()) != DOCKED_ALIGNMENT_NONE) { |
| if (!dock_layout_->is_dragged_window_docked()) |
| dock_layout_->DockDraggedWindow(window()); |
| } else { |
| if (dock_layout_->is_dragged_window_docked()) |
| dock_layout_->UndockDraggedWindow(); |
| } |
| } |
| |
| } // namespace internal |
| } // namespace ash |