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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/cursor_manager.h"
#include "ash/shell.h"
#include "ash/wm/image_cursors.h"
#include "base/logging.h"
#include "ui/aura/env.h"
#include "ui/aura/root_window.h"
#include "ui/base/cursor/cursor.h"
namespace {
// The coordinate of the cursor used when the mouse events are disabled.
const int kDisabledCursorLocationX = -10000;
const int kDisabledCursorLocationY = -10000;
void SetCursorOnAllRootWindows(gfx::NativeCursor cursor) {
ash::Shell::RootWindowList root_windows =
ash::Shell::GetInstance()->GetAllRootWindows();
for (ash::Shell::RootWindowList::iterator iter = root_windows.begin();
iter != root_windows.end(); ++iter)
(*iter)->SetCursor(cursor);
}
void NotifyCursorVisibilityChange(bool visible) {
ash::Shell::RootWindowList root_windows =
ash::Shell::GetInstance()->GetAllRootWindows();
for (ash::Shell::RootWindowList::iterator iter = root_windows.begin();
iter != root_windows.end(); ++iter)
(*iter)->OnCursorVisibilityChanged(visible);
}
void NotifyMouseEventsEnableStateChange(bool enabled) {
ash::Shell::RootWindowList root_windows =
ash::Shell::GetInstance()->GetAllRootWindows();
for (ash::Shell::RootWindowList::iterator iter = root_windows.begin();
iter != root_windows.end(); ++iter)
(*iter)->OnMouseEventsEnableStateChanged(enabled);
}
} // namespace
namespace ash {
namespace internal {
// Represents the cursor state which is composed of cursor type, visibility, and
// mouse events enable state. When mouse events are disabled, the cursor is
// always invisible.
class CursorState {
public:
CursorState()
: cursor_(ui::kCursorNone),
visible_(true),
mouse_events_enabled_(true),
visible_on_mouse_events_enabled_(true) {
}
gfx::NativeCursor cursor() const { return cursor_; }
void set_cursor(gfx::NativeCursor cursor) { cursor_ = cursor; }
bool visible() const { return visible_; }
void SetVisible(bool visible) {
if (mouse_events_enabled_)
visible_ = visible;
// Ignores the call when mouse events disabled.
}
bool mouse_events_enabled() const { return mouse_events_enabled_; }
void SetMouseEventsEnabled(bool enabled) {
if (mouse_events_enabled_ == enabled)
return;
mouse_events_enabled_ = enabled;
// Restores the visibility when mouse events are enabled.
if (enabled) {
visible_ = visible_on_mouse_events_enabled_;
} else {
visible_on_mouse_events_enabled_ = visible_;
visible_ = false;
}
}
private:
gfx::NativeCursor cursor_;
bool visible_;
bool mouse_events_enabled_;
// The visibility to set when mouse events are enabled.
bool visible_on_mouse_events_enabled_;
DISALLOW_COPY_AND_ASSIGN(CursorState);
};
} // namespace internal
CursorManager::CursorManager()
: cursor_lock_count_(0),
current_state_(new internal::CursorState),
state_on_unlock_(new internal::CursorState),
image_cursors_(new ImageCursors) {
}
CursorManager::~CursorManager() {
}
void CursorManager::SetCursor(gfx::NativeCursor cursor) {
state_on_unlock_->set_cursor(cursor);
if (cursor_lock_count_ == 0 &&
GetCurrentCursor() != state_on_unlock_->cursor()) {
SetCursorInternal(state_on_unlock_->cursor());
}
}
void CursorManager::ShowCursor() {
state_on_unlock_->SetVisible(true);
if (cursor_lock_count_ == 0 &&
IsCursorVisible() != state_on_unlock_->visible()) {
SetCursorVisibility(state_on_unlock_->visible());
}
}
void CursorManager::HideCursor() {
state_on_unlock_->SetVisible(false);
if (cursor_lock_count_ == 0 &&
IsCursorVisible() != state_on_unlock_->visible()) {
SetCursorVisibility(state_on_unlock_->visible());
}
}
bool CursorManager::IsCursorVisible() const {
return current_state_->visible();
}
void CursorManager::EnableMouseEvents() {
state_on_unlock_->SetMouseEventsEnabled(true);
if (cursor_lock_count_ == 0 &&
IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled());
}
}
void CursorManager::DisableMouseEvents() {
state_on_unlock_->SetMouseEventsEnabled(false);
if (cursor_lock_count_ == 0 &&
IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled());
}
}
bool CursorManager::IsMouseEventsEnabled() const {
return current_state_->mouse_events_enabled();
}
void CursorManager::SetDeviceScaleFactor(float device_scale_factor) {
if (image_cursors_->SetDeviceScaleFactor(device_scale_factor))
SetCursorInternal(GetCurrentCursor());
}
void CursorManager::LockCursor() {
cursor_lock_count_++;
}
void CursorManager::UnlockCursor() {
cursor_lock_count_--;
DCHECK_GE(cursor_lock_count_, 0);
if (cursor_lock_count_ > 0)
return;
if (GetCurrentCursor() != state_on_unlock_->cursor())
SetCursorInternal(state_on_unlock_->cursor());
if (IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled())
SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled());
if (IsCursorVisible() != state_on_unlock_->visible())
SetCursorVisibility(state_on_unlock_->visible());
}
void CursorManager::SetCursorInternal(gfx::NativeCursor cursor) {
gfx::NativeCursor new_cursor = cursor;
image_cursors_->SetPlatformCursor(&new_cursor);
new_cursor.set_device_scale_factor(image_cursors_->GetDeviceScaleFactor());
current_state_->set_cursor(new_cursor);
if (IsCursorVisible())
SetCursorOnAllRootWindows(GetCurrentCursor());
}
void CursorManager::SetCursorVisibility(bool visible) {
current_state_->SetVisible(visible);
if (visible) {
SetCursorInternal(GetCurrentCursor());
} else {
gfx::NativeCursor invisible_cursor(ui::kCursorNone);
image_cursors_->SetPlatformCursor(&invisible_cursor);
SetCursorOnAllRootWindows(invisible_cursor);
}
NotifyCursorVisibilityChange(visible);
}
void CursorManager::SetMouseEventsEnabled(bool enabled) {
current_state_->SetMouseEventsEnabled(enabled);
if (enabled) {
aura::Env::GetInstance()->set_last_mouse_location(
disabled_cursor_location_);
} else {
disabled_cursor_location_ = aura::Env::GetInstance()->last_mouse_location();
aura::Env::GetInstance()->set_last_mouse_location(
gfx::Point(kDisabledCursorLocationX, kDisabledCursorLocationY));
}
SetCursorVisibility(current_state_->visible());
NotifyMouseEventsEnableStateChange(enabled);
}
gfx::NativeCursor CursorManager::GetCurrentCursor() const {
return current_state_->cursor();
}
} // namespace ash
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