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// 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/panel_layout_manager.h"
#include <algorithm>
#include "ash/launcher/launcher.h"
#include "ash/shell.h"
#include "ash/wm/property_util.h"
#include "base/auto_reset.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
#include "ui/views/widget/widget.h"
namespace {
const int kPanelMarginEdge = 4;
const int kPanelMarginMiddle = 8;
const int kMinimizedHeight = 24;
const float kMaxHeightFactor = .80f;
const float kMaxWidthFactor = .50f;
}
namespace ash {
namespace internal {
////////////////////////////////////////////////////////////////////////////////
// PanelLayoutManager public implementation:
PanelLayoutManager::PanelLayoutManager(aura::Window* panel_container)
: panel_container_(panel_container),
in_layout_(false),
dragged_panel_(NULL) {
DCHECK(panel_container);
}
PanelLayoutManager::~PanelLayoutManager() {
}
void PanelLayoutManager::StartDragging(aura::Window* panel) {
DCHECK(dragged_panel_ == NULL);
DCHECK(panel->parent() == panel_container_);
dragged_panel_ = panel;
}
void PanelLayoutManager::FinishDragging() {
DCHECK(dragged_panel_ != NULL);
dragged_panel_ = NULL;
Relayout();
}
void PanelLayoutManager::ToggleMinimize(aura::Window* panel) {
DCHECK(panel->parent() == panel_container_);
if (panel->GetProperty(aura::client::kShowStateKey) ==
ui::SHOW_STATE_MINIMIZED) {
const gfx::Rect& old_bounds = panel->bounds();
panel->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
gfx::Rect new_bounds(old_bounds);
const gfx::Rect* restore_bounds = GetRestoreBounds(panel);
if (restore_bounds != NULL) {
new_bounds.set_height(restore_bounds->height());
new_bounds.set_y(old_bounds.bottom() - restore_bounds->height());
SetChildBounds(panel, new_bounds);
ClearRestoreBounds(panel);
}
} else {
const gfx::Rect& old_bounds = panel->bounds();
panel->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
SetRestoreBounds(panel, old_bounds);
SetChildBounds(panel,
gfx::Rect(old_bounds.x(),
old_bounds.bottom() - kMinimizedHeight,
old_bounds.width(),
kMinimizedHeight));
}
Relayout();
}
////////////////////////////////////////////////////////////////////////////////
// PanelLayoutManager, aura::LayoutManager implementation:
void PanelLayoutManager::OnWindowResized() {
Relayout();
}
void PanelLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
panel_windows_.push_back(child);
Relayout();
}
void PanelLayoutManager::OnWillRemoveWindowFromLayout(aura::Window* child) {
PanelList::iterator found =
std::find(panel_windows_.begin(), panel_windows_.end(), child);
if (found != panel_windows_.end())
panel_windows_.erase(found);
if (dragged_panel_ == child)
dragged_panel_ = NULL;
Relayout();
}
void PanelLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) {
}
void PanelLayoutManager::OnChildWindowVisibilityChanged(aura::Window* child,
bool visible) {
Relayout();
}
void PanelLayoutManager::SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) {
gfx::Rect bounds(requested_bounds);
const gfx::Rect& max_bounds = panel_container_->GetRootWindow()->bounds();
const int max_width = max_bounds.width() * kMaxWidthFactor;
const int max_height = max_bounds.height() * kMaxHeightFactor;
if (bounds.width() > max_width)
bounds.set_width(max_width);
if (bounds.height() > max_height)
bounds.set_height(max_height);
// Reposition dragged panel in the panel order.
if (dragged_panel_ == child) {
PanelList::iterator dragged_panel_iter =
std::find(panel_windows_.begin(), panel_windows_.end(), dragged_panel_);
DCHECK(dragged_panel_iter != panel_windows_.end());
PanelList::iterator new_position;
for (new_position = panel_windows_.begin();
new_position != panel_windows_.end();
++new_position) {
const gfx::Rect& bounds = (*new_position)->bounds();
if (bounds.x() + bounds.width()/2 <= requested_bounds.x()) break;
}
if (new_position != dragged_panel_iter) {
panel_windows_.erase(dragged_panel_iter);
panel_windows_.insert(new_position, dragged_panel_);
}
}
SetChildBoundsDirect(child, bounds);
Relayout();
}
////////////////////////////////////////////////////////////////////////////////
// PanelLayoutManager private implementation:
// This is a rough outline of a simple panel layout manager.
void PanelLayoutManager::Relayout() {
if (in_layout_)
return;
AutoReset<bool> auto_reset_in_layout(&in_layout_, true);
// Panels are currently laid out just above the launcher (if it exists),
// otherwise at the bottom of the root window.
int right, bottom;
ash::Shell* shell = ash::Shell::GetInstance();
if (shell->launcher() && shell->launcher()->widget()->IsVisible()) {
const gfx::Rect& bounds =
shell->launcher()->widget()->GetWindowScreenBounds();
right = bounds.width() - 1 - kPanelMarginEdge;
bottom = bounds.y() - 1;
} else {
const gfx::Rect& bounds = panel_container_->GetRootWindow()->bounds();
right = bounds.width() - 1 - kPanelMarginEdge;
bottom = bounds.bottom() - 1;
}
// Layout the panel windows right to left.
for (PanelList::iterator iter = panel_windows_.begin();
iter != panel_windows_.end(); ++iter) {
aura::Window* panel_win = *iter;
if (!panel_win->IsVisible())
continue;
int x = right - panel_win->bounds().width();
int y = bottom - panel_win->bounds().height();
// Do not relayout dragged panel, but pretend it is in place
if (panel_win != dragged_panel_) {
gfx::Rect bounds(x, y,
panel_win->bounds().width(),
panel_win->bounds().height());
SetChildBoundsDirect(panel_win, bounds);
}
right = x - kPanelMarginMiddle;
}
}
} // namespace internal
} // namespace ash
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