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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/display/multi_display_manager.h"
#include <string>
#include <vector>
#include "base/command_line.h"
#include "base/stl_util.h"
#include "base/string_split.h"
#include "ui/aura/aura_switches.h"
#include "ui/aura/env.h"
#include "ui/aura/root_window.h"
#include "ui/aura/root_window_host.h"
#include "ui/aura/window_property.h"
#include "ui/gfx/display.h"
#include "ui/gfx/rect.h"
DECLARE_WINDOW_PROPERTY_TYPE(int);
namespace ash {
namespace internal {
namespace {
gfx::Display& GetInvalidDisplay() {
static gfx::Display* invalid_display = new gfx::Display();
return *invalid_display;
}
} // namespace
using aura::RootWindow;
using aura::Window;
using std::string;
using std::vector;
DEFINE_WINDOW_PROPERTY_KEY(int, kDisplayIdKey, -1);
MultiDisplayManager::MultiDisplayManager() {
Init();
}
MultiDisplayManager::~MultiDisplayManager() {
}
// static
void MultiDisplayManager::AddRemoveDisplay() {
MultiDisplayManager* manager = static_cast<MultiDisplayManager*>(
aura::Env::GetInstance()->display_manager());
manager->AddRemoveDisplayImpl();
}
void MultiDisplayManager::CycleDisplay() {
MultiDisplayManager* manager = static_cast<MultiDisplayManager*>(
aura::Env::GetInstance()->display_manager());
manager->CycleDisplayImpl();
}
void MultiDisplayManager::ToggleDisplayScale() {
MultiDisplayManager* manager = static_cast<MultiDisplayManager*>(
aura::Env::GetInstance()->display_manager());
manager->ScaleDisplayImpl();
}
void MultiDisplayManager::OnNativeDisplaysChanged(
const std::vector<gfx::Display>& new_displays) {
size_t min = std::min(displays_.size(), new_displays.size());
// For m19, we only care about 1st display as primary, and
// don't differentiate the rest of displays as all secondary
// displays have the same content. ID for primary display stays the same
// because we never remove it, we don't update IDs for other displays
// , for now, because they're the same.
// TODO(oshima): Fix this so that we can differentiate outputs
// and keep a content on one display stays on the same display
// when a display is added or removed.
for (size_t i = 0; i < min; ++i) {
gfx::Display& current_display = displays_[i];
const gfx::Display& new_display = new_displays[i];
if (current_display.bounds_in_pixel() != new_display.bounds_in_pixel() ||
current_display.device_scale_factor() !=
new_display.device_scale_factor()) {
current_display.SetScaleAndBounds(new_display.device_scale_factor(),
new_display.bounds_in_pixel());
NotifyBoundsChanged(current_display);
}
}
if (displays_.size() < new_displays.size()) {
// New displays added
for (size_t i = min; i < new_displays.size(); ++i) {
const gfx::Display& new_display = new_displays[i];
displays_.push_back(gfx::Display(new_display.id()));
gfx::Display& display = displays_.back();
// Force the primary display's ID to be 0.
if (i == 0)
display.set_id(0);
display.SetScaleAndBounds(new_display.device_scale_factor(),
new_display.bounds_in_pixel());
NotifyDisplayAdded(display);
}
} else {
// Displays are removed. We keep the display for the primary
// display (at index 0) because it needs the display information
// even if it doesn't exit.
while (displays_.size() > new_displays.size() && displays_.size() > 1) {
Displays::reverse_iterator iter = displays_.rbegin();
NotifyDisplayRemoved(*iter);
displays_.erase(iter.base() - 1);
}
}
}
RootWindow* MultiDisplayManager::CreateRootWindowForDisplay(
const gfx::Display& display) {
RootWindow* root_window = new RootWindow(display.bounds_in_pixel());
// No need to remove RootWindowObserver because
// the DisplayManager object outlives RootWindow objects.
root_window->AddRootWindowObserver(this);
root_window->SetProperty(kDisplayIdKey, display.id());
root_window->Init();
return root_window;
}
const gfx::Display& MultiDisplayManager::GetDisplayAt(size_t index) {
return index < displays_.size() ? displays_[index] : GetInvalidDisplay();
}
size_t MultiDisplayManager::GetNumDisplays() const {
return displays_.size();
}
const gfx::Display& MultiDisplayManager::GetDisplayNearestWindow(
const Window* window) const {
if (!window) {
MultiDisplayManager* manager = const_cast<MultiDisplayManager*>(this);
return manager->GetDisplayAt(0);
}
const RootWindow* root = window->GetRootWindow();
MultiDisplayManager* manager = const_cast<MultiDisplayManager*>(this);
return root ? manager->FindDisplayForRootWindow(root) : GetInvalidDisplay();
}
const gfx::Display& MultiDisplayManager::GetDisplayNearestPoint(
const gfx::Point& point) const {
// TODO(oshima): For m19, mouse is constrained within
// the primary window.
MultiDisplayManager* manager = const_cast<MultiDisplayManager*>(this);
return manager->GetDisplayAt(0);
}
void MultiDisplayManager::OnRootWindowResized(const aura::RootWindow* root,
const gfx::Size& old_size) {
if (!use_fullscreen_host_window()) {
gfx::Display& display = FindDisplayForRootWindow(root);
display.SetSize(root->GetHostSize());
NotifyBoundsChanged(display);
}
}
bool MultiDisplayManager::UpdateWorkAreaOfDisplayNearestWindow(
const aura::Window* window,
const gfx::Insets& insets) {
const RootWindow* root = window->GetRootWindow();
gfx::Display& display = FindDisplayForRootWindow(root);
gfx::Rect old_work_area = display.work_area();
display.UpdateWorkAreaFromInsets(insets);
return old_work_area != display.work_area();
}
void MultiDisplayManager::Init() {
// TODO(oshima): Move this logic to DisplayChangeObserver.
const string size_str = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kAuraHostWindowSize);
vector<string> parts;
base::SplitString(size_str, ',', &parts);
for (vector<string>::const_iterator iter = parts.begin();
iter != parts.end(); ++iter) {
displays_.push_back(CreateDisplayFromSpec(*iter));
}
if (displays_.empty())
displays_.push_back(CreateDisplayFromSpec("" /* default */));
// Force the 1st display to be the primary display (id == 0).
displays_[0].set_id(0);
}
void MultiDisplayManager::AddRemoveDisplayImpl() {
std::vector<gfx::Display> new_displays;
if (displays_.size() > 1) {
// Remove if there is more than one display.
int count = displays_.size() - 1;
for (Displays::const_iterator iter = displays_.begin(); count-- > 0; ++iter)
new_displays.push_back(*iter);
} else {
// Add if there is only one display.
new_displays.push_back(displays_[0]);
new_displays.push_back(CreateDisplayFromSpec("50+50-1280x768"));
}
if (new_displays.size())
OnNativeDisplaysChanged(new_displays);
}
void MultiDisplayManager::CycleDisplayImpl() {
if (displays_.size() > 1) {
std::vector<gfx::Display> new_displays;
for (Displays::const_iterator iter = displays_.begin() + 1;
iter != displays_.end(); ++iter) {
gfx::Display display = *iter;
new_displays.push_back(display);
}
new_displays.push_back(displays_.front());
OnNativeDisplaysChanged(new_displays);
}
}
void MultiDisplayManager::ScaleDisplayImpl() {
if (displays_.size() > 0) {
std::vector<gfx::Display> new_displays;
for (Displays::const_iterator iter = displays_.begin();
iter != displays_.end(); ++iter) {
gfx::Display display = *iter;
float factor = display.device_scale_factor() == 1.0f ? 2.0f : 1.0f;
display.SetScaleAndBounds(
factor, gfx::Rect(display.bounds_in_pixel().origin(),
display.size().Scale(factor)));
new_displays.push_back(display);
}
OnNativeDisplaysChanged(new_displays);
}
}
gfx::Display& MultiDisplayManager::FindDisplayForRootWindow(
const aura::RootWindow* root_window) {
int id = root_window->GetProperty(kDisplayIdKey);
for (Displays::iterator iter = displays_.begin();
iter != displays_.end(); ++iter) {
if ((*iter).id() == id)
return *iter;
}
DLOG(FATAL) << "Could not find display by id:" << id;
return GetInvalidDisplay();
}
} // namespace internal
} // namespace ash
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