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// Copyright (c) 2013 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 "ui/wm/core/cursor_manager.h"
#include <utility>
#include "base/logging.h"
#include "base/macros.h"
#include "ui/aura/client/cursor_client_observer.h"
#include "ui/wm/core/native_cursor_manager.h"
#include "ui/wm/core/native_cursor_manager_delegate.h"
namespace wm {
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),
cursor_set_(ui::CURSOR_SET_NORMAL),
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.
}
ui::CursorSetType cursor_set() const { return cursor_set_; }
void set_cursor_set(ui::CursorSetType cursor_set) {
cursor_set_ = cursor_set;
}
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_;
ui::CursorSetType cursor_set_;
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(scoped_ptr<NativeCursorManager> delegate)
: delegate_(std::move(delegate)),
cursor_lock_count_(0),
current_state_(new internal::CursorState),
state_on_unlock_(new internal::CursorState) {}
CursorManager::~CursorManager() {
}
void CursorManager::SetCursor(gfx::NativeCursor cursor) {
state_on_unlock_->set_cursor(cursor);
if (cursor_lock_count_ == 0 &&
GetCursor() != state_on_unlock_->cursor()) {
delegate_->SetCursor(state_on_unlock_->cursor(), this);
}
}
gfx::NativeCursor CursorManager::GetCursor() const {
return current_state_->cursor();
}
void CursorManager::ShowCursor() {
state_on_unlock_->SetVisible(true);
if (cursor_lock_count_ == 0 &&
IsCursorVisible() != state_on_unlock_->visible()) {
delegate_->SetVisibility(state_on_unlock_->visible(), this);
FOR_EACH_OBSERVER(aura::client::CursorClientObserver, observers_,
OnCursorVisibilityChanged(true));
}
}
void CursorManager::HideCursor() {
state_on_unlock_->SetVisible(false);
if (cursor_lock_count_ == 0 &&
IsCursorVisible() != state_on_unlock_->visible()) {
delegate_->SetVisibility(state_on_unlock_->visible(), this);
FOR_EACH_OBSERVER(aura::client::CursorClientObserver, observers_,
OnCursorVisibilityChanged(false));
}
}
bool CursorManager::IsCursorVisible() const {
return current_state_->visible();
}
void CursorManager::SetCursorSet(ui::CursorSetType cursor_set) {
state_on_unlock_->set_cursor_set(cursor_set);
if (GetCursorSet() != state_on_unlock_->cursor_set())
delegate_->SetCursorSet(state_on_unlock_->cursor_set(), this);
}
ui::CursorSetType CursorManager::GetCursorSet() const {
return current_state_->cursor_set();
}
void CursorManager::EnableMouseEvents() {
state_on_unlock_->SetMouseEventsEnabled(true);
if (cursor_lock_count_ == 0 &&
IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
delegate_->SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled(),
this);
}
}
void CursorManager::DisableMouseEvents() {
state_on_unlock_->SetMouseEventsEnabled(false);
if (cursor_lock_count_ == 0 &&
IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
delegate_->SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled(),
this);
}
}
bool CursorManager::IsMouseEventsEnabled() const {
return current_state_->mouse_events_enabled();
}
void CursorManager::SetDisplay(const gfx::Display& display) {
delegate_->SetDisplay(display, this);
}
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 (GetCursor() != state_on_unlock_->cursor()) {
delegate_->SetCursor(state_on_unlock_->cursor(), this);
}
if (IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
delegate_->SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled(),
this);
}
if (IsCursorVisible() != state_on_unlock_->visible()) {
delegate_->SetVisibility(state_on_unlock_->visible(),
this);
}
}
bool CursorManager::IsCursorLocked() const {
return cursor_lock_count_ > 0;
}
void CursorManager::AddObserver(
aura::client::CursorClientObserver* observer) {
observers_.AddObserver(observer);
}
void CursorManager::RemoveObserver(
aura::client::CursorClientObserver* observer) {
observers_.RemoveObserver(observer);
}
bool CursorManager::ShouldHideCursorOnKeyEvent(
const ui::KeyEvent& event) const {
return false;
}
void CursorManager::CommitCursor(gfx::NativeCursor cursor) {
current_state_->set_cursor(cursor);
}
void CursorManager::CommitVisibility(bool visible) {
// TODO(tdanderson): Find a better place for this so we don't
// notify the observers more than is necessary.
FOR_EACH_OBSERVER(aura::client::CursorClientObserver, observers_,
OnCursorVisibilityChanged(visible));
current_state_->SetVisible(visible);
}
void CursorManager::CommitCursorSet(ui::CursorSetType cursor_set) {
current_state_->set_cursor_set(cursor_set);
}
void CursorManager::CommitMouseEventsEnabled(bool enabled) {
current_state_->SetMouseEventsEnabled(enabled);
}
} // namespace wm
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