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chromium / chromium / src / 14742b2f2c45a16743d0176d8e654302db6a67bf / . / ui / views / controls / menu / menu_controller.cc
blob: 95dd4f9a9de9b687b422ecd8e10584fe9590fc8b [file] [log] [blame]
// 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 "ui/views/controls/menu/menu_controller.h"
#include "base/i18n/case_conversion.h"
#include "base/i18n/rtl.h"
#include "base/macros.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "ui/base/dragdrop/drag_utils.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/display/screen.h"
#include "ui/events/event.h"
#include "ui/events/event_utils.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/native_theme/native_theme.h"
#include "ui/views/controls/button/menu_button.h"
#include "ui/views/controls/menu/menu_config.h"
#include "ui/views/controls/menu/menu_controller_delegate.h"
#include "ui/views/controls/menu/menu_host_root_view.h"
#include "ui/views/controls/menu/menu_item_view.h"
#include "ui/views/controls/menu/menu_message_loop.h"
#include "ui/views/controls/menu/menu_scroll_view_container.h"
#include "ui/views/controls/menu/submenu_view.h"
#include "ui/views/drag_utils.h"
#include "ui/views/focus/view_storage.h"
#include "ui/views/mouse_constants.h"
#include "ui/views/view.h"
#include "ui/views/view_constants.h"
#include "ui/views/views_delegate.h"
#include "ui/views/widget/root_view.h"
#include "ui/views/widget/tooltip_manager.h"
#include "ui/views/widget/widget.h"
#if defined(OS_WIN)
#include "ui/aura/window_tree_host.h"
#include "ui/base/win/internal_constants.h"
#include "ui/display/win/screen_win.h"
#include "ui/views/win/hwnd_util.h"
#endif
#if defined(USE_AURA)
#include "ui/views/controls/menu/menu_pre_target_handler.h"
#endif
using base::Time;
using base::TimeDelta;
using ui::OSExchangeData;
namespace views {
namespace {
// When showing context menu on mouse down, the user might accidentally select
// the menu item on the subsequent mouse up. To prevent this, we add the
// following delay before the user is able to select an item.
int menu_selection_hold_time_ms = kMinimumMsPressedToActivate;
// Period of the scroll timer (in milliseconds).
const int kScrollTimerMS = 30;
// Amount of time from when the drop exits the menu and the menu is hidden.
const int kCloseOnExitTime = 1200;
// If a context menu is invoked by touch, we shift the menu by this offset so
// that the finger does not obscure the menu.
const int kCenteredContextMenuYOffset = -15;
// The spacing offset for the bubble tip.
const int kBubbleTipSizeLeftRight = 12;
const int kBubbleTipSizeTopBottom = 11;
// The maximum distance (in DIPS) that the mouse can be moved before it should
// trigger a mouse menu item activation (regardless of how long the menu has
// been showing).
const float kMaximumLengthMovedToActivate = 4.0f;
// Returns true if the mnemonic of |menu| matches key.
bool MatchesMnemonic(MenuItemView* menu, base::char16 key) {
return key != 0 && menu->GetMnemonic() == key;
}
// Returns true if |menu| doesn't have a mnemonic and first character of the its
// title is |key|.
bool TitleMatchesMnemonic(MenuItemView* menu, base::char16 key) {
if (menu->GetMnemonic())
return false;
base::string16 lower_title = base::i18n::ToLower(menu->title());
return !lower_title.empty() && lower_title[0] == key;
}
// Returns the first descendant of |view| that is hot tracked.
CustomButton* GetFirstHotTrackedView(View* view) {
if (!view)
return NULL;
CustomButton* button = CustomButton::AsCustomButton(view);
if (button && button->IsHotTracked())
return button;
for (int i = 0; i < view->child_count(); ++i) {
CustomButton* hot_view = GetFirstHotTrackedView(view->child_at(i));
if (hot_view)
return hot_view;
}
return NULL;
}
// Recurses through the child views of |view| returning the first view starting
// at |start| that is focusable. A value of -1 for |start| indicates to start at
// the first view (if |forward| is false, iterating starts at the last view). If
// |forward| is true the children are considered first to last, otherwise last
// to first.
View* GetFirstFocusableView(View* view, int start, bool forward) {
if (forward) {
for (int i = start == -1 ? 0 : start; i < view->child_count(); ++i) {
View* deepest = GetFirstFocusableView(view->child_at(i), -1, forward);
if (deepest)
return deepest;
}
} else {
for (int i = start == -1 ? view->child_count() - 1 : start; i >= 0; --i) {
View* deepest = GetFirstFocusableView(view->child_at(i), -1, forward);
if (deepest)
return deepest;
}
}
return view->IsFocusable() ? view : NULL;
}
// Returns the first child of |start| that is focusable.
View* GetInitialFocusableView(View* start, bool forward) {
return GetFirstFocusableView(start, -1, forward);
}
// Returns the next view after |start_at| that is focusable. Returns NULL if
// there are no focusable children of |ancestor| after |start_at|.
View* GetNextFocusableView(View* ancestor, View* start_at, bool forward) {
DCHECK(ancestor->Contains(start_at));
View* parent = start_at;
do {
View* new_parent = parent->parent();
int index = new_parent->GetIndexOf(parent);
index += forward ? 1 : -1;
if (forward || index != -1) {
View* next = GetFirstFocusableView(new_parent, index, forward);
if (next)
return next;
}
parent = new_parent;
} while (parent != ancestor);
return NULL;
}
#if defined(OS_WIN) || defined(OS_CHROMEOS)
// Determines the correct cooridinates and window to repost |event| to, if it is
// a mouse or touch event.
static void RepostEventImpl(const ui::LocatedEvent* event,
const gfx::Point& screen_loc,
gfx::NativeView native_view,
gfx::NativeWindow window) {
if (!event->IsMouseEvent() && !event->IsTouchEvent()) {
// TODO(rbyers): Gesture event repost is tricky to get right
// crbug.com/170987.
DCHECK(event->IsGestureEvent());
return;
}
if (!native_view)
return;
#if defined(OS_WIN)
gfx::Point screen_loc_pixels =
display::win::ScreenWin::DIPToScreenPoint(screen_loc);
HWND target_window = ::WindowFromPoint(screen_loc_pixels.ToPOINT());
// If we don't find a native window for the HWND at the current location,
// then attempt to find a native window from its parent if one exists.
// There are HWNDs created outside views, which don't have associated
// native windows.
if (!window) {
HWND parent = ::GetParent(target_window);
if (parent) {
aura::WindowTreeHost* host =
aura::WindowTreeHost::GetForAcceleratedWidget(parent);
if (host) {
target_window = parent;
window = host->window();
}
}
}
// Convert screen_loc to pixels for the Win32 API's like WindowFromPoint,
// PostMessage/SendMessage to work correctly. These API's expect the
// coordinates to be in pixels.
if (event->IsMouseEvent()) {
HWND source_window = HWNDForNativeView(native_view);
if (!target_window || !source_window ||
GetWindowThreadProcessId(source_window, NULL) !=
GetWindowThreadProcessId(target_window, NULL)) {
// Even though we have mouse capture, windows generates a mouse event if
// the other window is in a separate thread. Only repost an event if
// |target_window| and |source_window| were created on the same thread,
// else double events can occur and lead to bad behavior.
return;
}
// Determine whether the click was in the client area or not.
// NOTE: WM_NCHITTEST coordinates are relative to the screen.
LPARAM coords = MAKELPARAM(screen_loc_pixels.x(), screen_loc_pixels.y());
LRESULT nc_hit_result = SendMessage(target_window, WM_NCHITTEST, 0, coords);
const bool client_area = nc_hit_result == HTCLIENT;
// TODO(sky): this isn't right. The event to generate should correspond with
// the event we just got. MouseEvent only tells us what is down, which may
// differ. Need to add ability to get changed button from MouseEvent.
int event_type;
int flags = event->flags();
if (flags & ui::EF_LEFT_MOUSE_BUTTON) {
event_type = client_area ? WM_LBUTTONDOWN : WM_NCLBUTTONDOWN;
} else if (flags & ui::EF_MIDDLE_MOUSE_BUTTON) {
event_type = client_area ? WM_MBUTTONDOWN : WM_NCMBUTTONDOWN;
} else if (flags & ui::EF_RIGHT_MOUSE_BUTTON) {
event_type = client_area ? WM_RBUTTONDOWN : WM_NCRBUTTONDOWN;
} else {
NOTREACHED();
return;
}
int window_x = screen_loc_pixels.x();
int window_y = screen_loc_pixels.y();
if (client_area) {
POINT pt = {window_x, window_y};
ScreenToClient(target_window, &pt);
window_x = pt.x;
window_y = pt.y;
}
WPARAM target = client_area ? event->native_event().wParam : nc_hit_result;
LPARAM window_coords = MAKELPARAM(window_x, window_y);
PostMessage(target_window, event_type, target, window_coords);
return;
}
#endif
// Non Aura window.
if (!window)
return;
MenuMessageLoop::RepostEventToWindow(event, window, screen_loc);
}
#endif // defined(OS_WIN) || defined(OS_CHROMEOS)
} // namespace
// MenuScrollTask --------------------------------------------------------------
// MenuScrollTask is used when the SubmenuView does not all fit on screen and
// the mouse is over the scroll up/down buttons. MenuScrollTask schedules
// itself with a RepeatingTimer. When Run is invoked MenuScrollTask scrolls
// appropriately.
class MenuController::MenuScrollTask {
public:
MenuScrollTask() : submenu_(NULL), is_scrolling_up_(false), start_y_(0) {
pixels_per_second_ = MenuItemView::pref_menu_height() * 20;
}
void Update(const MenuController::MenuPart& part) {
if (!part.is_scroll()) {
StopScrolling();
return;
}
DCHECK(part.submenu);
SubmenuView* new_menu = part.submenu;
bool new_is_up = (part.type == MenuController::MenuPart::SCROLL_UP);
if (new_menu == submenu_ && is_scrolling_up_ == new_is_up)
return;
start_scroll_time_ = base::Time::Now();
start_y_ = part.submenu->GetVisibleBounds().y();
submenu_ = new_menu;
is_scrolling_up_ = new_is_up;
if (!scrolling_timer_.IsRunning()) {
scrolling_timer_.Start(FROM_HERE,
TimeDelta::FromMilliseconds(kScrollTimerMS),
this, &MenuScrollTask::Run);
}
}
void StopScrolling() {
if (scrolling_timer_.IsRunning()) {
scrolling_timer_.Stop();
submenu_ = NULL;
}
}
// The menu being scrolled. Returns null if not scrolling.
SubmenuView* submenu() const { return submenu_; }
private:
void Run() {
DCHECK(submenu_);
gfx::Rect vis_rect = submenu_->GetVisibleBounds();
const int delta_y = static_cast<int>(
(base::Time::Now() - start_scroll_time_).InMilliseconds() *
pixels_per_second_ / 1000);
vis_rect.set_y(is_scrolling_up_ ?
std::max(0, start_y_ - delta_y) :
std::min(submenu_->height() - vis_rect.height(), start_y_ + delta_y));
submenu_->ScrollRectToVisible(vis_rect);
}
// SubmenuView being scrolled.
SubmenuView* submenu_;
// Direction scrolling.
bool is_scrolling_up_;
// Timer to periodically scroll.
base::RepeatingTimer scrolling_timer_;
// Time we started scrolling at.
base::Time start_scroll_time_;
// How many pixels to scroll per second.
int pixels_per_second_;
// Y-coordinate of submenu_view_ when scrolling started.
int start_y_;
DISALLOW_COPY_AND_ASSIGN(MenuScrollTask);
};
// MenuController:SelectByCharDetails ----------------------------------------
struct MenuController::SelectByCharDetails {
SelectByCharDetails()
: first_match(-1),
has_multiple(false),
index_of_item(-1),
next_match(-1) {
}
// Index of the first menu with the specified mnemonic.
int first_match;
// If true there are multiple menu items with the same mnemonic.
bool has_multiple;
// Index of the selected item; may remain -1.
int index_of_item;
// If there are multiple matches this is the index of the item after the
// currently selected item whose mnemonic matches. This may remain -1 even
// though there are matches.
int next_match;
};
// MenuController:State ------------------------------------------------------
MenuController::State::State()
: item(nullptr),
hot_button(nullptr),
submenu_open(false),
anchor(MENU_ANCHOR_TOPLEFT),
context_menu(false) {
}
MenuController::State::State(const State& other) = default;
MenuController::State::~State() {}
// MenuController ------------------------------------------------------------
// static
MenuController* MenuController::active_instance_ = NULL;
// static
MenuController* MenuController::GetActiveInstance() {
return active_instance_;
}
MenuItemView* MenuController::Run(Widget* parent,
MenuButton* button,
MenuItemView* root,
const gfx::Rect& bounds,
MenuAnchorPosition position,
bool context_menu,
bool is_nested_drag,
int* result_event_flags) {
exit_type_ = EXIT_NONE;
possible_drag_ = false;
drag_in_progress_ = false;
did_initiate_drag_ = false;
closing_event_time_ = base::TimeTicks();
menu_start_time_ = base::TimeTicks::Now();
menu_start_mouse_press_loc_ = gfx::Point();
if (parent) {
View* root_view = parent->GetRootView();
if (root_view) {
const ui::Event* event =
static_cast<internal::RootView*>(root_view)->current_event();
if (event && event->type() == ui::ET_MOUSE_PRESSED) {
gfx::Point screen_loc(
static_cast<const ui::MouseEvent*>(event)->location());
View::ConvertPointToScreen(
static_cast<View*>(event->target()), &screen_loc);
menu_start_mouse_press_loc_ = screen_loc;
}
}
}
// If we are already showing, this new menu is being nested. Such as context
// menus on top of normal menus.
if (showing_) {
// Only support nesting of blocking_run menus, nesting of
// blocking/non-blocking shouldn't be needed.
DCHECK(blocking_run_);
state_.hot_button = hot_button_;
hot_button_ = nullptr;
// We're already showing, push the current state.
menu_stack_.push_back(std::make_pair(state_, std::move(pressed_lock_)));
// The context menu should be owned by the same parent.
DCHECK_EQ(owner_, parent);
} else {
showing_ = true;
if (owner_)
owner_->RemoveObserver(this);
owner_ = parent;
if (owner_)
owner_->AddObserver(this);
#if defined(USE_AURA)
// Only create a MenuPreTargetHandler for non-nested menus. Nested menus
// will use the existing one.
menu_pre_target_handler_.reset(new MenuPreTargetHandler(this, owner_));
#endif
}
// Reset current state.
pending_state_ = State();
state_ = State();
UpdateInitialLocation(bounds, position, context_menu);
// Set the selection, which opens the initial menu.
SetSelection(root, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
if (!blocking_run_) {
if (!is_nested_drag) {
// Start the timer to hide the menu. This is needed as we get no
// notification when the drag has finished.
StartCancelAllTimer();
}
return NULL;
}
if (button)
pressed_lock_.reset(new MenuButton::PressedLock(button));
// Make sure Chrome doesn't attempt to shut down while the menu is showing.
if (ViewsDelegate::GetInstance())
ViewsDelegate::GetInstance()->AddRef();
if (async_run_)
return nullptr;
// We need to turn on nestable tasks as in some situations (pressing alt-f for
// one) the menus are run from a task. If we don't do this and are invoked
// from a task none of the tasks we schedule are processed and the menu
// appears totally broken.
message_loop_depth_++;
DCHECK_LE(message_loop_depth_, 2);
RunMessageLoop();
message_loop_depth_--;
if (ViewsDelegate::GetInstance())
ViewsDelegate::GetInstance()->ReleaseRef();
if (result_event_flags)
*result_event_flags = accept_event_flags_;
// The nested message loop could have been killed externally. Check to see if
// there are nested asynchronous menus to shutdown.
if (async_run_ && delegate_stack_.size() > 1)
ExitAsyncRun();
return ExitMenuRun();
}
void MenuController::Cancel(ExitType type) {
// If the menu has already been destroyed, no further cancellation is
// needed. We especially don't want to set the |exit_type_| to a lesser
// value.
if (exit_type_ == EXIT_DESTROYED || exit_type_ == type)
return;
if (!showing_) {
// This occurs if we're in the process of notifying the delegate for a drop
// and the delegate cancels us.
return;
}
MenuItemView* selected = state_.item;
SetExitType(type);
SendMouseCaptureLostToActiveView();
// Hide windows immediately.
SetSelection(NULL, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
if (!blocking_run_) {
// If we didn't block the caller we need to notify the menu, which
// triggers deleting us.
DCHECK(selected);
showing_ = false;
delegate_->OnMenuClosed(internal::MenuControllerDelegate::NOTIFY_DELEGATE,
selected->GetRootMenuItem(), accept_event_flags_);
// WARNING: the call to MenuClosed deletes us.
return;
}
// On Windows and Linux the destruction of this menu's Widget leads to the
// teardown of the platform specific drag-and-drop Widget. Do not shutdown
// while dragging, leave the Widget hidden until drag-and-drop has completed,
// at which point all menus will be destroyed.
//
// If |type| is EXIT_ALL we update the state of the menu to not showing. So
// that during the completion of a drag we are not incorrectly reporting the
// visual state.
if (!drag_in_progress_)
ExitAsyncRun();
else if (type == EXIT_ALL)
showing_ = false;
}
void MenuController::AddNestedDelegate(
internal::MenuControllerDelegate* delegate) {
delegate_stack_.push_back(std::make_pair(delegate, async_run_));
delegate_ = delegate;
}
void MenuController::SetAsyncRun(bool is_async) {
delegate_stack_.back().second = is_async;
async_run_ = is_async;
}
bool MenuController::OnMousePressed(SubmenuView* source,
const ui::MouseEvent& event) {
// We should either have no current_mouse_event_target_, or should have a
// pressed state stored.
DCHECK(!current_mouse_event_target_ || current_mouse_pressed_state_);
// Find the root view to check. If any buttons were previously pressed, this
// is the same root view we've been forwarding to. Otherwise, it's the root
// view of the target.
MenuHostRootView* forward_to_root =
current_mouse_pressed_state_ ? current_mouse_event_target_
: GetRootView(source, event.location());
current_mouse_pressed_state_ |= event.changed_button_flags();
if (forward_to_root) {
ui::MouseEvent event_for_root(event);
// Reset hot-tracking if a different view is getting a mouse press.
ConvertLocatedEventForRootView(source, forward_to_root, &event_for_root);
View* view =
forward_to_root->GetEventHandlerForPoint(event_for_root.location());
CustomButton* button = CustomButton::AsCustomButton(view);
if (hot_button_ != button)
SetHotTrackedButton(button);
// Empty menu items are always handled by the menu controller.
if (!view || view->id() != MenuItemView::kEmptyMenuItemViewID) {
bool processed = forward_to_root->ProcessMousePressed(event_for_root);
// If the event was processed, the root view becomes our current mouse
// handler...
if (processed && !current_mouse_event_target_) {
current_mouse_event_target_ = forward_to_root;
}
// ...and we always return the result of the current handler.
if (current_mouse_event_target_)
return processed;
}
}
// Otherwise, the menu handles this click directly.
SetSelectionOnPointerDown(source, &event);
return true;
}
bool MenuController::OnMouseDragged(SubmenuView* source,
const ui::MouseEvent& event) {
if (current_mouse_event_target_) {
ui::MouseEvent event_for_root(event);
ConvertLocatedEventForRootView(source, current_mouse_event_target_,
&event_for_root);
return current_mouse_event_target_->ProcessMouseDragged(event_for_root);
}
MenuPart part = GetMenuPart(source, event.location());
UpdateScrolling(part);
if (!blocking_run_)
return false;
if (possible_drag_) {
if (View::ExceededDragThreshold(event.location() - press_pt_))
StartDrag(source, press_pt_);
return true;
}
MenuItemView* mouse_menu = NULL;
if (part.type == MenuPart::MENU_ITEM) {
if (!part.menu)
part.menu = source->GetMenuItem();
else
mouse_menu = part.menu;
SetSelection(part.menu ? part.menu : state_.item, SELECTION_OPEN_SUBMENU);
} else if (part.type == MenuPart::NONE) {
ShowSiblingMenu(source, event.location());
}
UpdateActiveMouseView(source, event, mouse_menu);
return true;
}
void MenuController::OnMouseReleased(SubmenuView* source,
const ui::MouseEvent& event) {
current_mouse_pressed_state_ &= ~event.changed_button_flags();
if (current_mouse_event_target_) {
// If this was the final mouse button, then remove the forwarding target.
// We need to do this *before* dispatching the event to the root view
// because there's a chance that the event will open a nested (and blocking)
// menu, and we need to not have a forwarded root view.
MenuHostRootView* cached_event_target = current_mouse_event_target_;
if (!current_mouse_pressed_state_)
current_mouse_event_target_ = nullptr;
ui::MouseEvent event_for_root(event);
ConvertLocatedEventForRootView(source, cached_event_target,
&event_for_root);
cached_event_target->ProcessMouseReleased(event_for_root);
return;
}
if (!blocking_run_)
return;
DCHECK(state_.item);
possible_drag_ = false;
DCHECK(blocking_run_);
MenuPart part = GetMenuPart(source, event.location());
if (event.IsRightMouseButton() && part.type == MenuPart::MENU_ITEM) {
MenuItemView* menu = part.menu;
// |menu| is NULL means this event is from an empty menu or a separator.
// If it is from an empty menu, use parent context menu instead of that.
if (menu == NULL &&
part.submenu->child_count() == 1 &&
part.submenu->child_at(0)->id() == MenuItemView::kEmptyMenuItemViewID) {
menu = part.parent;
}
if (menu != NULL) {
gfx::Point screen_location(event.location());
View::ConvertPointToScreen(source->GetScrollViewContainer(),
&screen_location);
if (ShowContextMenu(menu, screen_location, ui::MENU_SOURCE_MOUSE))
return;
}
}
// We can use Ctrl+click or the middle mouse button to recursively open urls
// for selected folder menu items. If it's only a left click, show the
// contents of the folder.
if (!part.is_scroll() && part.menu &&
!(part.menu->HasSubmenu() &&
(event.flags() & ui::EF_LEFT_MOUSE_BUTTON))) {
if (GetActiveMouseView()) {
SendMouseReleaseToActiveView(source, event);
return;
}
// If a mouse release was received quickly after showing.
base::TimeDelta time_shown = base::TimeTicks::Now() - menu_start_time_;
if (time_shown.InMilliseconds() < menu_selection_hold_time_ms) {
// And it wasn't far from the mouse press location.
gfx::Point screen_loc(event.location());
View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
gfx::Vector2d moved = screen_loc - menu_start_mouse_press_loc_;
if (moved.Length() < kMaximumLengthMovedToActivate) {
// Ignore the mouse release as it was likely this menu was shown under
// the mouse and the action was just a normal click.
return;
}
}
if (part.menu->GetDelegate()->ShouldExecuteCommandWithoutClosingMenu(
part.menu->GetCommand(), event)) {
part.menu->GetDelegate()->ExecuteCommand(part.menu->GetCommand(),
event.flags());
return;
}
if (!part.menu->NonIconChildViewsCount() &&
part.menu->GetDelegate()->IsTriggerableEvent(part.menu, event)) {
base::TimeDelta shown_time = base::TimeTicks::Now() - menu_start_time_;
if (!state_.context_menu || !View::ShouldShowContextMenuOnMousePress() ||
shown_time.InMilliseconds() > menu_selection_hold_time_ms) {
Accept(part.menu, event.flags());
}
return;
}
} else if (part.type == MenuPart::MENU_ITEM) {
// User either clicked on empty space, or a menu that has children.
SetSelection(part.menu ? part.menu : state_.item,
SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
}
SendMouseCaptureLostToActiveView();
}
void MenuController::OnMouseMoved(SubmenuView* source,
const ui::MouseEvent& event) {
if (current_mouse_event_target_) {
ui::MouseEvent event_for_root(event);
ConvertLocatedEventForRootView(source, current_mouse_event_target_,
&event_for_root);
current_mouse_event_target_->ProcessMouseMoved(event_for_root);
return;
}
MenuHostRootView* root_view = GetRootView(source, event.location());
if (root_view) {
root_view->ProcessMouseMoved(event);
// Update hot-tracked button when a button state is changed with a mouse
// event. It is necessary to track it for accurate hot-tracking when both
// mouse and keyboard are used to navigate the menu.
ui::MouseEvent event_for_root(event);
ConvertLocatedEventForRootView(source, root_view, &event_for_root);
View* view =
root_view->GetEventHandlerForPoint(event_for_root.location());
CustomButton* button = CustomButton::AsCustomButton(view);
if (button && button->IsHotTracked())
SetHotTrackedButton(button);
}
HandleMouseLocation(source, event.location());
}
void MenuController::OnMouseEntered(SubmenuView* source,
const ui::MouseEvent& event) {
// MouseEntered is always followed by a mouse moved, so don't need to
// do anything here.
}
bool MenuController::OnMouseWheel(SubmenuView* source,
const ui::MouseWheelEvent& event) {
MenuPart part = GetMenuPart(source, event.location());
return part.submenu && part.submenu->OnMouseWheel(event);
}
void MenuController::OnGestureEvent(SubmenuView* source,
ui::GestureEvent* event) {
MenuHostRootView* root_view = GetRootView(source, event->location());
if (root_view) {
// Reset hot-tracking if a different view is getting a touch event.
ui::GestureEvent event_for_root(*event);
ConvertLocatedEventForRootView(source, root_view, &event_for_root);
View* view =
root_view->GetEventHandlerForPoint(event_for_root.location());
CustomButton* button = CustomButton::AsCustomButton(view);
if (hot_button_ && hot_button_ != button)
SetHotTrackedButton(nullptr);
}
MenuPart part = GetMenuPart(source, event->location());
if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
SetSelectionOnPointerDown(source, event);
event->StopPropagation();
} else if (event->type() == ui::ET_GESTURE_LONG_PRESS) {
if (part.type == MenuPart::MENU_ITEM && part.menu) {
gfx::Point screen_location(event->location());
View::ConvertPointToScreen(source->GetScrollViewContainer(),
&screen_location);
if (ShowContextMenu(part.menu, screen_location, ui::MENU_SOURCE_TOUCH))
event->StopPropagation();
}
} else if (event->type() == ui::ET_GESTURE_TAP) {
if (!part.is_scroll() && part.menu &&
!(part.menu->HasSubmenu())) {
if (part.menu->GetDelegate()->IsTriggerableEvent(
part.menu, *event)) {
item_selected_by_touch_ = true;
Accept(part.menu, event->flags());
}
event->StopPropagation();
} else if (part.type == MenuPart::MENU_ITEM) {
// User either tapped on empty space, or a menu that has children.
SetSelection(part.menu ? part.menu : state_.item,
SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
event->StopPropagation();
}
} else if (event->type() == ui::ET_GESTURE_TAP_CANCEL &&
part.menu &&
part.type == MenuPart::MENU_ITEM) {
// Move the selection to the parent menu so that the selection in the
// current menu is unset. Make sure the submenu remains open by sending the
// appropriate SetSelectionTypes flags.
SetSelection(part.menu->GetParentMenuItem(),
SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
event->StopPropagation();
}
if (event->stopped_propagation())
return;
if (!part.submenu)
return;
part.submenu->OnGestureEvent(event);
}
void MenuController::OnTouchEvent(SubmenuView* source, ui::TouchEvent* event) {
if (event->type() == ui::ET_TOUCH_PRESSED) {
MenuPart part = GetMenuPart(source, event->location());
if (part.type == MenuPart::NONE) {
RepostEventAndCancel(source, event);
event->SetHandled();
}
}
}
View* MenuController::GetTooltipHandlerForPoint(SubmenuView* source,
const gfx::Point& point) {
MenuHostRootView* root_view = GetRootView(source, point);
return root_view ? root_view->ProcessGetTooltipHandlerForPoint(point)
: nullptr;
}
void MenuController::ViewHierarchyChanged(
SubmenuView* source,
const View::ViewHierarchyChangedDetails& details) {
if (!details.is_add) {
// If the current mouse handler is removed, remove it as the handler.
if (details.child == current_mouse_event_target_) {
current_mouse_event_target_ = nullptr;
current_mouse_pressed_state_ = 0;
}
// Update |hot_button_| (both in |this| and in |menu_stack_| if it gets
// removed while a menu is up.
if (details.child == hot_button_) {
hot_button_ = nullptr;
for (auto&& nested_state : menu_stack_) {
State& state = nested_state.first;
if (details.child == state.hot_button)
state.hot_button = nullptr;
}
}
}
}
bool MenuController::GetDropFormats(
SubmenuView* source,
int* formats,
std::set<ui::Clipboard::FormatType>* format_types) {
return source->GetMenuItem()->GetDelegate()->GetDropFormats(
source->GetMenuItem(), formats, format_types);
}
bool MenuController::AreDropTypesRequired(SubmenuView* source) {
return source->GetMenuItem()->GetDelegate()->AreDropTypesRequired(
source->GetMenuItem());
}
bool MenuController::CanDrop(SubmenuView* source, const OSExchangeData& data) {
return source->GetMenuItem()->GetDelegate()->CanDrop(source->GetMenuItem(),
data);
}
void MenuController::OnDragEntered(SubmenuView* source,
const ui::DropTargetEvent& event) {
valid_drop_coordinates_ = false;
}
int MenuController::OnDragUpdated(SubmenuView* source,
const ui::DropTargetEvent& event) {
StopCancelAllTimer();
gfx::Point screen_loc(event.location());
View::ConvertPointToScreen(source, &screen_loc);
if (valid_drop_coordinates_ && screen_loc == drop_pt_)
return last_drop_operation_;
drop_pt_ = screen_loc;
valid_drop_coordinates_ = true;
MenuItemView* menu_item = GetMenuItemAt(source, event.x(), event.y());
bool over_empty_menu = false;
if (!menu_item) {
// See if we're over an empty menu.
menu_item = GetEmptyMenuItemAt(source, event.x(), event.y());
if (menu_item)
over_empty_menu = true;
}
MenuDelegate::DropPosition drop_position = MenuDelegate::DROP_NONE;
int drop_operation = ui::DragDropTypes::DRAG_NONE;
if (menu_item) {
gfx::Point menu_item_loc(event.location());
View::ConvertPointToTarget(source, menu_item, &menu_item_loc);
MenuItemView* query_menu_item;
if (!over_empty_menu) {
int menu_item_height = menu_item->height();
if (menu_item->HasSubmenu() &&
(menu_item_loc.y() > kDropBetweenPixels &&
menu_item_loc.y() < (menu_item_height - kDropBetweenPixels))) {
drop_position = MenuDelegate::DROP_ON;
} else {
drop_position = (menu_item_loc.y() < menu_item_height / 2) ?
MenuDelegate::DROP_BEFORE : MenuDelegate::DROP_AFTER;
}
query_menu_item = menu_item;
} else {
query_menu_item = menu_item->GetParentMenuItem();
drop_position = MenuDelegate::DROP_ON;
}
drop_operation = menu_item->GetDelegate()->GetDropOperation(
query_menu_item, event, &drop_position);
// If the menu has a submenu, schedule the submenu to open.
SetSelection(menu_item, menu_item->HasSubmenu() ? SELECTION_OPEN_SUBMENU :
SELECTION_DEFAULT);
if (drop_position == MenuDelegate::DROP_NONE ||
drop_operation == ui::DragDropTypes::DRAG_NONE)
menu_item = NULL;
} else {
SetSelection(source->GetMenuItem(), SELECTION_OPEN_SUBMENU);
}
SetDropMenuItem(menu_item, drop_position);
last_drop_operation_ = drop_operation;
return drop_operation;
}
void MenuController::OnDragExited(SubmenuView* source) {
StartCancelAllTimer();
if (drop_target_) {
StopShowTimer();
SetDropMenuItem(NULL, MenuDelegate::DROP_NONE);
}
}
int MenuController::OnPerformDrop(SubmenuView* source,
const ui::DropTargetEvent& event) {
DCHECK(drop_target_);
// NOTE: the delegate may delete us after invoking OnPerformDrop, as such
// we don't call cancel here.
MenuItemView* item = state_.item;
DCHECK(item);
MenuItemView* drop_target = drop_target_;
MenuDelegate::DropPosition drop_position = drop_position_;
// Close all menus, including any nested menus.
SetSelection(NULL, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
CloseAllNestedMenus();
// Set state such that we exit.
showing_ = false;
SetExitType(EXIT_ALL);
// If over an empty menu item, drop occurs on the parent.
if (drop_target->id() == MenuItemView::kEmptyMenuItemViewID)
drop_target = drop_target->GetParentMenuItem();
if (!IsBlockingRun()) {
delegate_->OnMenuClosed(
internal::MenuControllerDelegate::DONT_NOTIFY_DELEGATE,
item->GetRootMenuItem(), accept_event_flags_);
}
// WARNING: the call to MenuClosed deletes us.
return drop_target->GetDelegate()->OnPerformDrop(
drop_target, drop_position, event);
}
void MenuController::OnDragEnteredScrollButton(SubmenuView* source,
bool is_up) {
MenuPart part;
part.type = is_up ? MenuPart::SCROLL_UP : MenuPart::SCROLL_DOWN;
part.submenu = source;
UpdateScrolling(part);
// Do this to force the selection to hide.
SetDropMenuItem(source->GetMenuItemAt(0), MenuDelegate::DROP_NONE);
StopCancelAllTimer();
}
void MenuController::OnDragExitedScrollButton(SubmenuView* source) {
StartCancelAllTimer();
SetDropMenuItem(NULL, MenuDelegate::DROP_NONE);
StopScrolling();
}
void MenuController::OnDragWillStart() {
DCHECK(!drag_in_progress_);
drag_in_progress_ = true;
}
void MenuController::OnDragComplete(bool should_close) {
DCHECK(drag_in_progress_);
drag_in_progress_ = false;
// During a drag, mouse events are processed directly by the widget, and not
// sent to the MenuController. At drag completion, reset pressed state and
// the event target.
current_mouse_pressed_state_ = 0;
current_mouse_event_target_ = nullptr;
// Only attempt to close if the MenuHost said to.
if (should_close) {
if (showing_) {
// Close showing widgets.
if (GetActiveInstance() == this) {
CloseAllNestedMenus();
Cancel(EXIT_ALL);
}
// The above may have deleted us. If not perform a full shutdown.
if (GetActiveInstance() == this)
ExitAsyncRun();
} else if (exit_type_ == EXIT_ALL) {
// We may have been canceled during the drag. If so we still need to fully
// shutdown.
ExitAsyncRun();
}
}
}
ui::PostDispatchAction MenuController::OnWillDispatchKeyEvent(
ui::KeyEvent* event) {
if (exit_type() == EXIT_ALL || exit_type() == EXIT_DESTROYED) {
// If the event has arrived after the menu's exit type had changed but
// before its message loop terminated, the event will continue its normal
// propagation for the following reason:
// If the user accepts a menu item in a nested menu, the menu item action is
// run after the base::RunLoop for the innermost menu has quit but before
// the base::RunLoop for the outermost menu has quit. If the menu item
// action starts a base::RunLoop, the outermost menu's base::RunLoop will
// not quit till the action's base::RunLoop ends. IDC_BOOKMARK_BAR_OPEN_ALL
// sometimes opens a modal dialog. The modal dialog starts a base::RunLoop
// and keeps the base::RunLoop running for the duration of its lifetime.
TerminateNestedMessageLoopIfNecessary();
return ui::POST_DISPATCH_PERFORM_DEFAULT;
}
event->StopPropagation();
if (event->type() == ui::ET_KEY_PRESSED) {
OnKeyDown(event->key_code());
// Menu controller might have been deleted.
if (!GetActiveInstance())
return ui::POST_DISPATCH_NONE;
// Do not check mnemonics if the Alt or Ctrl modifiers are pressed. For
// example Ctrl+<T> is an accelerator, but <T> only is a mnemonic.
const int kKeyFlagsMask = ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN;
const int flags = event->flags();
if (exit_type() == EXIT_NONE && (flags & kKeyFlagsMask) == 0) {
base::char16 c = event->GetCharacter();
SelectByChar(c);
// Menu controller might have been deleted.
if (!GetActiveInstance())
return ui::POST_DISPATCH_NONE;
}
}
if (!TerminateNestedMessageLoopIfNecessary()) {
ui::Accelerator accelerator(*event);
ViewsDelegate::ProcessMenuAcceleratorResult result =
ViewsDelegate::GetInstance()->ProcessAcceleratorWhileMenuShowing(
accelerator);
if (result == ViewsDelegate::ProcessMenuAcceleratorResult::CLOSE_MENU)
CancelAll();
}
return ui::POST_DISPATCH_NONE;
}
void MenuController::UpdateSubmenuSelection(SubmenuView* submenu) {
if (submenu->IsShowing()) {
gfx::Point point = display::Screen::GetScreen()->GetCursorScreenPoint();
const SubmenuView* root_submenu =
submenu->GetMenuItem()->GetRootMenuItem()->GetSubmenu();
View::ConvertPointFromScreen(
root_submenu->GetWidget()->GetRootView(), &point);
HandleMouseLocation(submenu, point);
}
}
void MenuController::OnWidgetDestroying(Widget* widget) {
DCHECK_EQ(owner_, widget);
owner_->RemoveObserver(this);
owner_ = NULL;
}
bool MenuController::IsCancelAllTimerRunningForTest() {
return cancel_all_timer_.IsRunning();
}
// static
void MenuController::TurnOffMenuSelectionHoldForTest() {
menu_selection_hold_time_ms = -1;
}
void MenuController::SetSelection(MenuItemView* menu_item,
int selection_types) {
size_t paths_differ_at = 0;
std::vector<MenuItemView*> current_path;
std::vector<MenuItemView*> new_path;
BuildPathsAndCalculateDiff(pending_state_.item, menu_item, &current_path,
&new_path, &paths_differ_at);
size_t current_size = current_path.size();
size_t new_size = new_path.size();
bool pending_item_changed = pending_state_.item != menu_item;
if (pending_item_changed && pending_state_.item)
SetHotTrackedButton(nullptr);
// Notify the old path it isn't selected.
MenuDelegate* current_delegate =
current_path.empty() ? NULL : current_path.front()->GetDelegate();
for (size_t i = paths_differ_at; i < current_size; ++i) {
if (current_delegate &&
current_path[i]->GetType() == MenuItemView::SUBMENU) {
current_delegate->WillHideMenu(current_path[i]);
}
current_path[i]->SetSelected(false);
}
// Notify the new path it is selected.
for (size_t i = paths_differ_at; i < new_size; ++i) {
new_path[i]->ScrollRectToVisible(new_path[i]->GetLocalBounds());
new_path[i]->SetSelected(true);
}
if (menu_item && menu_item->GetDelegate())
menu_item->GetDelegate()->SelectionChanged(menu_item);
DCHECK(menu_item || (selection_types & SELECTION_EXIT) != 0);
pending_state_.item = menu_item;
pending_state_.submenu_open = (selection_types & SELECTION_OPEN_SUBMENU) != 0;
// Stop timers.
StopCancelAllTimer();
// Resets show timer only when pending menu item is changed.
if (pending_item_changed)
StopShowTimer();
if (selection_types & SELECTION_UPDATE_IMMEDIATELY)
CommitPendingSelection();
else if (pending_item_changed)
StartShowTimer();
// Notify an accessibility focus event on all menu items except for the root.
if (menu_item &&
(MenuDepth(menu_item) != 1 ||
menu_item->GetType() != MenuItemView::SUBMENU)) {
menu_item->NotifyAccessibilityEvent(
ui::AX_EVENT_SELECTION, true);
}
}
void MenuController::SetSelectionOnPointerDown(SubmenuView* source,
const ui::LocatedEvent* event) {
if (!blocking_run_)
return;
DCHECK(!GetActiveMouseView());
MenuPart part = GetMenuPart(source, event->location());
if (part.is_scroll())
return; // Ignore presses on scroll buttons.
// When this menu is opened through a touch event, a simulated right-click
// is sent before the menu appears. Ignore it.
if ((event->flags() & ui::EF_RIGHT_MOUSE_BUTTON) &&
(event->flags() & ui::EF_FROM_TOUCH))
return;
if (part.type == MenuPart::NONE ||
(part.type == MenuPart::MENU_ITEM && part.menu &&
part.menu->GetRootMenuItem() != state_.item->GetRootMenuItem())) {
// Remember the time stamp of the current (press down) event. The owner can
// then use this to figure out if this menu was finished with the same click
// which is sent to it thereafter.
closing_event_time_ = event->time_stamp();
// Event wasn't pressed over any menu, or the active menu, cancel.
RepostEventAndCancel(source, event);
// Do not repost events for Linux Aura because this behavior is more
// consistent with the behavior of other Linux apps.
return;
}
// On a press we immediately commit the selection, that way a submenu
// pops up immediately rather than after a delay.
int selection_types = SELECTION_UPDATE_IMMEDIATELY;
if (!part.menu) {
part.menu = part.parent;
selection_types |= SELECTION_OPEN_SUBMENU;
} else {
if (part.menu->GetDelegate()->CanDrag(part.menu)) {
possible_drag_ = true;
press_pt_ = event->location();
}
if (part.menu->HasSubmenu())
selection_types |= SELECTION_OPEN_SUBMENU;
}
SetSelection(part.menu, selection_types);
}
void MenuController::StartDrag(SubmenuView* source,
const gfx::Point& location) {
MenuItemView* item = state_.item;
DCHECK(item);
// Points are in the coordinates of the submenu, need to map to that of
// the selected item. Additionally source may not be the parent of
// the selected item, so need to map to screen first then to item.
gfx::Point press_loc(location);
View::ConvertPointToScreen(source->GetScrollViewContainer(), &press_loc);
View::ConvertPointFromScreen(item, &press_loc);
gfx::Point widget_loc(press_loc);
View::ConvertPointToWidget(item, &widget_loc);
std::unique_ptr<gfx::Canvas> canvas(GetCanvasForDragImage(
source->GetWidget(), gfx::Size(item->width(), item->height())));
item->PaintButton(canvas.get(), MenuItemView::PB_FOR_DRAG);
OSExchangeData data;
item->GetDelegate()->WriteDragData(item, &data);
drag_utils::SetDragImageOnDataObject(*canvas,
press_loc.OffsetFromOrigin(),
&data);
StopScrolling();
int drag_ops = item->GetDelegate()->GetDragOperations(item);
did_initiate_drag_ = true;
// TODO(varunjain): Properly determine and send DRAG_EVENT_SOURCE below.
item->GetWidget()->RunShellDrag(NULL, data, widget_loc, drag_ops,
ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
// MenuController may have been deleted if |async_run_| so check for an active
// instance before accessing member variables.
if (GetActiveInstance() == this)
did_initiate_drag_ = false;
}
void MenuController::OnKeyDown(ui::KeyboardCode key_code) {
// Do not process while performing drag-and-drop
if (!blocking_run_)
return;
switch (key_code) {
case ui::VKEY_UP:
IncrementSelection(INCREMENT_SELECTION_UP);
break;
case ui::VKEY_DOWN:
IncrementSelection(INCREMENT_SELECTION_DOWN);
break;
// Handling of VK_RIGHT and VK_LEFT is different depending on the UI
// layout.
case ui::VKEY_RIGHT:
if (base::i18n::IsRTL())
CloseSubmenu();
else
OpenSubmenuChangeSelectionIfCan();
break;
case ui::VKEY_LEFT:
if (base::i18n::IsRTL())
OpenSubmenuChangeSelectionIfCan();
else
CloseSubmenu();
break;
// On Mac, treat space the same as return.
#if !defined(OS_MACOSX)
case ui::VKEY_SPACE:
SendAcceleratorToHotTrackedView();
break;
#endif
case ui::VKEY_F4:
if (!is_combobox_)
break;
// Fallthrough to accept or dismiss combobox menus on F4, like windows.
case ui::VKEY_RETURN:
#if defined(OS_MACOSX)
case ui::VKEY_SPACE:
#endif
if (pending_state_.item) {
if (pending_state_.item->HasSubmenu()) {
if (key_code == ui::VKEY_F4 &&
pending_state_.item->GetSubmenu()->IsShowing())
Cancel(EXIT_ALL);
else
OpenSubmenuChangeSelectionIfCan();
} else {
if (!SendAcceleratorToHotTrackedView() &&
pending_state_.item->enabled()) {
Accept(pending_state_.item, 0);
}
}
}
break;
case ui::VKEY_ESCAPE:
if (!state_.item->GetParentMenuItem() ||
(!state_.item->GetParentMenuItem()->GetParentMenuItem() &&
(!state_.item->HasSubmenu() ||
!state_.item->GetSubmenu()->IsShowing()))) {
// User pressed escape and only one menu is shown, cancel it.
Cancel(EXIT_OUTERMOST);
break;
}
CloseSubmenu();
break;
case ui::VKEY_APPS: {
CustomButton* hot_view = GetFirstHotTrackedView(pending_state_.item);
if (hot_view) {
hot_view->ShowContextMenu(hot_view->GetKeyboardContextMenuLocation(),
ui::MENU_SOURCE_KEYBOARD);
} else if (pending_state_.item->enabled() &&
pending_state_.item->GetRootMenuItem() !=
pending_state_.item) {
// Show the context menu for the given menu item. We don't try to show
// the menu for the (boundless) root menu item. This can happen, e.g.,
// when the user hits the APPS key after opening the menu, when no item
// is selected, but showing a context menu for an implicitly-selected
// and invisible item doesn't make sense.
ShowContextMenu(pending_state_.item,
pending_state_.item->GetKeyboardContextMenuLocation(),
ui::MENU_SOURCE_KEYBOARD);
}
break;
}
#if defined(OS_WIN)
// On Windows, pressing Alt and F10 keys should hide the menu to match the
// OS behavior.
case ui::VKEY_MENU:
case ui::VKEY_F10:
Cancel(EXIT_ALL);
break;
#endif
default:
break;
}
}
MenuController::MenuController(bool blocking,
internal::MenuControllerDelegate* delegate)
: blocking_run_(blocking),
showing_(false),
exit_type_(EXIT_NONE),
did_capture_(false),
result_(NULL),
accept_event_flags_(0),
drop_target_(NULL),
drop_position_(MenuDelegate::DROP_UNKNOWN),
owner_(NULL),
possible_drag_(false),
drag_in_progress_(false),
did_initiate_drag_(false),
valid_drop_coordinates_(false),
last_drop_operation_(MenuDelegate::DROP_UNKNOWN),
showing_submenu_(false),
active_mouse_view_id_(ViewStorage::GetInstance()->CreateStorageID()),
hot_button_(nullptr),
delegate_(delegate),
message_loop_depth_(0),
async_run_(false),
is_combobox_(false),
item_selected_by_touch_(false),
current_mouse_event_target_(nullptr),
current_mouse_pressed_state_(0),
message_loop_(MenuMessageLoop::Create()) {
delegate_stack_.push_back(std::make_pair(delegate_, async_run_));
active_instance_ = this;
}
MenuController::~MenuController() {
DCHECK(!showing_);
if (owner_)
owner_->RemoveObserver(this);
if (active_instance_ == this)
active_instance_ = NULL;
StopShowTimer();
StopCancelAllTimer();
}
void MenuController::RunMessageLoop() {
message_loop_->Run();
}
bool MenuController::SendAcceleratorToHotTrackedView() {
CustomButton* hot_view = GetFirstHotTrackedView(pending_state_.item);
if (!hot_view)
return false;
ui::Accelerator accelerator(ui::VKEY_RETURN, ui::EF_NONE);
hot_view->AcceleratorPressed(accelerator);
// An accelerator may have canceled the menu after activation.
if (GetActiveInstance()) {
CustomButton* button = static_cast<CustomButton*>(hot_view);
SetHotTrackedButton(button);
}
return true;
}
void MenuController::UpdateInitialLocation(const gfx::Rect& bounds,
MenuAnchorPosition position,
bool context_menu) {
pending_state_.context_menu = context_menu;
pending_state_.initial_bounds = bounds;
if (bounds.height() > 1) {
// Inset the bounds slightly, otherwise drag coordinates don't line up
// nicely and menus close prematurely.
pending_state_.initial_bounds.Inset(0, 1);
}
// Reverse anchor position for RTL languages.
if (base::i18n::IsRTL() &&
(position == MENU_ANCHOR_TOPRIGHT || position == MENU_ANCHOR_TOPLEFT)) {
pending_state_.anchor = position == MENU_ANCHOR_TOPRIGHT
? MENU_ANCHOR_TOPLEFT
: MENU_ANCHOR_TOPRIGHT;
} else {
pending_state_.anchor = position;
}
// Calculate the bounds of the monitor we'll show menus on. Do this once to
// avoid repeated system queries for the info.
pending_state_.monitor_bounds = display::Screen::GetScreen()
->GetDisplayNearestPoint(bounds.origin())
.work_area();
if (!pending_state_.monitor_bounds.Contains(bounds)) {
// Use the monitor area if the work area doesn't contain the bounds. This
// handles showing a menu from the launcher.
gfx::Rect monitor_area = display::Screen::GetScreen()
->GetDisplayNearestPoint(bounds.origin())
.bounds();
if (monitor_area.Contains(bounds))
pending_state_.monitor_bounds = monitor_area;
}
}
void MenuController::Accept(MenuItemView* item, int event_flags) {
DCHECK(IsBlockingRun());
result_ = item;
if (item && !menu_stack_.empty() &&
!item->GetDelegate()->ShouldCloseAllMenusOnExecute(item->GetCommand())) {
SetExitType(EXIT_OUTERMOST);
} else {
SetExitType(EXIT_ALL);
}
accept_event_flags_ = event_flags;
ExitAsyncRun();
}
bool MenuController::ShowSiblingMenu(SubmenuView* source,
const gfx::Point& mouse_location) {
if (!menu_stack_.empty() || !pressed_lock_.get())
return false;
View* source_view = source->GetScrollViewContainer();
if (mouse_location.x() >= 0 &&
mouse_location.x() < source_view->width() &&
mouse_location.y() >= 0 &&
mouse_location.y() < source_view->height()) {
// The mouse is over the menu, no need to continue.
return false;
}
// TODO(oshima): Replace with views only API.
if (!owner_ ||
!display::Screen::GetScreen()->IsWindowUnderCursor(
owner_->GetNativeWindow())) {
return false;
}
// The user moved the mouse outside the menu and over the owning window. See
// if there is a sibling menu we should show.
gfx::Point screen_point(mouse_location);
View::ConvertPointToScreen(source_view, &screen_point);
MenuAnchorPosition anchor;
bool has_mnemonics;
MenuButton* button = NULL;
MenuItemView* alt_menu = source->GetMenuItem()->GetDelegate()->
GetSiblingMenu(source->GetMenuItem()->GetRootMenuItem(),
screen_point, &anchor, &has_mnemonics, &button);
if (!alt_menu || (state_.item && state_.item->GetRootMenuItem() == alt_menu))
return false;
delegate_->SiblingMenuCreated(alt_menu);
if (!button) {
// If the delegate returns a menu, they must also return a button.
NOTREACHED();
return false;
}
// There is a sibling menu, update the button state, hide the current menu
// and show the new one.
pressed_lock_.reset(
new MenuButton::PressedLock(button, true /* is_sibling_menu_show */));
// Need to reset capture when we show the menu again, otherwise we aren't
// going to get any events.
did_capture_ = false;
gfx::Point screen_menu_loc;
View::ConvertPointToScreen(button, &screen_menu_loc);
// It is currently not possible to show a submenu recursively in a bubble.
DCHECK(!MenuItemView::IsBubble(anchor));
// Subtract 1 from the height to make the popup flush with the button border.
UpdateInitialLocation(gfx::Rect(screen_menu_loc.x(), screen_menu_loc.y(),
button->width(), button->height() - 1),
anchor, state_.context_menu);
alt_menu->PrepareForRun(
false, has_mnemonics,
source->GetMenuItem()->GetRootMenuItem()->show_mnemonics_);
alt_menu->controller_ = this;
SetSelection(alt_menu, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
return true;
}
bool MenuController::ShowContextMenu(MenuItemView* menu_item,
const gfx::Point& screen_location,
ui::MenuSourceType source_type) {
// Set the selection immediately, making sure the submenu is only open
// if it already was.
int selection_types = SELECTION_UPDATE_IMMEDIATELY;
if (state_.item == pending_state_.item && state_.submenu_open)
selection_types |= SELECTION_OPEN_SUBMENU;
SetSelection(pending_state_.item, selection_types);
if (menu_item->GetDelegate()->ShowContextMenu(
menu_item, menu_item->GetCommand(), screen_location, source_type)) {
SendMouseCaptureLostToActiveView();
return true;
}
return false;
}
void MenuController::CloseAllNestedMenus() {
for (auto&& nested_menu : menu_stack_) {
State& state = nested_menu.first;
MenuItemView* last_item = state.item;
for (MenuItemView* item = last_item; item;
item = item->GetParentMenuItem()) {
CloseMenu(item);
last_item = item;
}
state.submenu_open = false;
state.item = last_item;
}
}
MenuItemView* MenuController::GetMenuItemAt(View* source, int x, int y) {
// Walk the view hierarchy until we find a menu item (or the root).
View* child_under_mouse = source->GetEventHandlerForPoint(gfx::Point(x, y));
while (child_under_mouse &&
child_under_mouse->id() != MenuItemView::kMenuItemViewID) {
child_under_mouse = child_under_mouse->parent();
}
if (child_under_mouse && child_under_mouse->enabled() &&
child_under_mouse->id() == MenuItemView::kMenuItemViewID) {
return static_cast<MenuItemView*>(child_under_mouse);
}
return NULL;
}
MenuItemView* MenuController::GetEmptyMenuItemAt(View* source, int x, int y) {
View* child_under_mouse = source->GetEventHandlerForPoint(gfx::Point(x, y));
if (child_under_mouse &&
child_under_mouse->id() == MenuItemView::kEmptyMenuItemViewID) {
return static_cast<MenuItemView*>(child_under_mouse);
}
return NULL;
}
bool MenuController::IsScrollButtonAt(SubmenuView* source,
int x,
int y,
MenuPart::Type* part) {
MenuScrollViewContainer* scroll_view = source->GetScrollViewContainer();
View* child_under_mouse =
scroll_view->GetEventHandlerForPoint(gfx::Point(x, y));
if (child_under_mouse && child_under_mouse->enabled()) {
if (child_under_mouse == scroll_view->scroll_up_button()) {
*part = MenuPart::SCROLL_UP;
return true;
}
if (child_under_mouse == scroll_view->scroll_down_button()) {
*part = MenuPart::SCROLL_DOWN;
return true;
}
}
return false;
}
MenuController::MenuPart MenuController::GetMenuPart(
SubmenuView* source,
const gfx::Point& source_loc) {
gfx::Point screen_loc(source_loc);
View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
return GetMenuPartByScreenCoordinateUsingMenu(state_.item, screen_loc);
}
MenuController::MenuPart MenuController::GetMenuPartByScreenCoordinateUsingMenu(
MenuItemView* item,
const gfx::Point& screen_loc) {
MenuPart part;
for (; item; item = item->GetParentMenuItem()) {
if (item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
GetMenuPartByScreenCoordinateImpl(item->GetSubmenu(), screen_loc,
&part)) {
return part;
}
}
return part;
}
bool MenuController::GetMenuPartByScreenCoordinateImpl(
SubmenuView* menu,
const gfx::Point& screen_loc,
MenuPart* part) {
// Is the mouse over the scroll buttons?
gfx::Point scroll_view_loc = screen_loc;
View* scroll_view_container = menu->GetScrollViewContainer();
View::ConvertPointFromScreen(scroll_view_container, &scroll_view_loc);
if (scroll_view_loc.x() < 0 ||
scroll_view_loc.x() >= scroll_view_container->width() ||
scroll_view_loc.y() < 0 ||
scroll_view_loc.y() >= scroll_view_container->height()) {
// Point isn't contained in menu.
return false;
}
if (IsScrollButtonAt(menu, scroll_view_loc.x(), scroll_view_loc.y(),
&(part->type))) {
part->submenu = menu;
return true;
}
// Not over the scroll button. Check the actual menu.
if (DoesSubmenuContainLocation(menu, screen_loc)) {
gfx::Point menu_loc = screen_loc;
View::ConvertPointFromScreen(menu, &menu_loc);
part->menu = GetMenuItemAt(menu, menu_loc.x(), menu_loc.y());
part->type = MenuPart::MENU_ITEM;
part->submenu = menu;
if (!part->menu)
part->parent = menu->GetMenuItem();
return true;
}
// While the mouse isn't over a menu item or the scroll buttons of menu, it
// is contained by menu and so we return true. If we didn't return true other
// menus would be searched, even though they are likely obscured by us.
return true;
}
MenuHostRootView* MenuController::GetRootView(SubmenuView* submenu,
const gfx::Point& source_loc) {
MenuPart part = GetMenuPart(submenu, source_loc);
SubmenuView* view = part.submenu;
return view && view->GetWidget()
? static_cast<MenuHostRootView*>(view->GetWidget()->GetRootView())
: nullptr;
}
void MenuController::ConvertLocatedEventForRootView(View* source,
View* dst,
ui::LocatedEvent* event) {
if (source->GetWidget()->GetRootView() == dst)
return;
gfx::Point new_location(event->location());
View::ConvertPointToScreen(source, &new_location);
View::ConvertPointFromScreen(dst, &new_location);
event->set_location(new_location);
}
bool MenuController::DoesSubmenuContainLocation(SubmenuView* submenu,
const gfx::Point& screen_loc) {
gfx::Point view_loc = screen_loc;
View::ConvertPointFromScreen(submenu, &view_loc);
gfx::Rect vis_rect = submenu->GetVisibleBounds();
return vis_rect.Contains(view_loc.x(), view_loc.y());
}
void MenuController::CommitPendingSelection() {
StopShowTimer();
size_t paths_differ_at = 0;
std::vector<MenuItemView*> current_path;
std::vector<MenuItemView*> new_path;
BuildPathsAndCalculateDiff(state_.item, pending_state_.item, &current_path,
&new_path, &paths_differ_at);
// Hide the old menu.
for (size_t i = paths_differ_at; i < current_path.size(); ++i) {
if (current_path[i]->HasSubmenu()) {
current_path[i]->GetSubmenu()->Hide();
}
}
// Copy pending to state_, making sure to preserve the direction menus were
// opened.
std::list<bool> pending_open_direction;
state_.open_leading.swap(pending_open_direction);
state_ = pending_state_;
state_.open_leading.swap(pending_open_direction);
int menu_depth = MenuDepth(state_.item);
if (menu_depth == 0) {
state_.open_leading.clear();
} else {
int cached_size = static_cast<int>(state_.open_leading.size());
DCHECK_GE(menu_depth, 0);
while (cached_size-- >= menu_depth)
state_.open_leading.pop_back();
}
if (!state_.item) {
// Nothing to select.
StopScrolling();
return;
}
// Open all the submenus preceeding the last menu item (last menu item is
// handled next).
if (new_path.size() > 1) {
for (std::vector<MenuItemView*>::iterator i = new_path.begin();
i != new_path.end() - 1; ++i) {
OpenMenu(*i);
}
}
if (state_.submenu_open) {
// The submenu should be open, open the submenu if the item has a submenu.
if (state_.item->HasSubmenu()) {
OpenMenu(state_.item);
} else {
state_.submenu_open = false;
}
} else if (state_.item->HasSubmenu() &&
state_.item->GetSubmenu()->IsShowing()) {
state_.item->GetSubmenu()->Hide();
}
if (scroll_task_.get() && scroll_task_->submenu()) {
// Stop the scrolling if none of the elements of the selection contain
// the menu being scrolled.
bool found = false;
for (MenuItemView* item = state_.item; item && !found;
item = item->GetParentMenuItem()) {
found = (item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
item->GetSubmenu() == scroll_task_->submenu());
}
if (!found)
StopScrolling();
}
}
void MenuController::CloseMenu(MenuItemView* item) {
DCHECK(item);
if (!item->HasSubmenu())
return;
item->GetSubmenu()->Hide();
}
void MenuController::OpenMenu(MenuItemView* item) {
DCHECK(item);
if (item->GetSubmenu()->IsShowing()) {
return;
}
OpenMenuImpl(item, true);
did_capture_ = true;
}
void MenuController::OpenMenuImpl(MenuItemView* item, bool show) {
// TODO(oshima|sky): Don't show the menu if drag is in progress and
// this menu doesn't support drag drop. See crbug.com/110495.
if (show) {
int old_count = item->GetSubmenu()->child_count();
item->GetDelegate()->WillShowMenu(item);
if (old_count != item->GetSubmenu()->child_count()) {
// If the number of children changed then we may need to add empty items.
item->RemoveEmptyMenus();
item->AddEmptyMenus();
}
}
bool prefer_leading =
state_.open_leading.empty() ? true : state_.open_leading.back();
bool resulting_direction;
gfx::Rect bounds = MenuItemView::IsBubble(state_.anchor) ?
CalculateBubbleMenuBounds(item, prefer_leading, &resulting_direction) :
CalculateMenuBounds(item, prefer_leading, &resulting_direction);
state_.open_leading.push_back(resulting_direction);
bool do_capture = (!did_capture_ && blocking_run_);
showing_submenu_ = true;
if (show) {
// Menus are the only place using kGroupingPropertyKey, so any value (other
// than 0) is fine.
const int kGroupingId = 1001;
item->GetSubmenu()->ShowAt(owner_, bounds, do_capture);
item->GetSubmenu()->GetWidget()->SetNativeWindowProperty(
TooltipManager::kGroupingPropertyKey,
reinterpret_cast<void*>(kGroupingId));
} else {
item->GetSubmenu()->Reposition(bounds);
}
showing_submenu_ = false;
}
void MenuController::MenuChildrenChanged(MenuItemView* item) {
DCHECK(item);
// Menu shouldn't be updated during drag operation.
DCHECK(!GetActiveMouseView());
// If the current item or pending item is a descendant of the item
// that changed, move the selection back to the changed item.
const MenuItemView* ancestor = state_.item;
while (ancestor && ancestor != item)
ancestor = ancestor->GetParentMenuItem();
if (!ancestor) {
ancestor = pending_state_.item;
while (ancestor && ancestor != item)
ancestor = ancestor->GetParentMenuItem();
if (!ancestor)
return;
}
SetSelection(item, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
if (item->HasSubmenu())
OpenMenuImpl(item, false);
}
void MenuController::BuildPathsAndCalculateDiff(
MenuItemView* old_item,
MenuItemView* new_item,
std::vector<MenuItemView*>* old_path,
std::vector<MenuItemView*>* new_path,
size_t* first_diff_at) {
DCHECK(old_path && new_path && first_diff_at);
BuildMenuItemPath(old_item, old_path);
BuildMenuItemPath(new_item, new_path);
size_t common_size = std::min(old_path->size(), new_path->size());
// Find the first difference between the two paths, when the loop
// returns, diff_i is the first index where the two paths differ.
for (size_t i = 0; i < common_size; ++i) {
if ((*old_path)[i] != (*new_path)[i]) {
*first_diff_at = i;
return;
}
}
*first_diff_at = common_size;
}
void MenuController::BuildMenuItemPath(MenuItemView* item,
std::vector<MenuItemView*>* path) {
if (!item)
return;
BuildMenuItemPath(item->GetParentMenuItem(), path);
path->push_back(item);
}
void MenuController::StartShowTimer() {
show_timer_.Start(
FROM_HERE, TimeDelta::FromMilliseconds(MenuConfig::instance().show_delay),
this, &MenuController::CommitPendingSelection);
}
void MenuController::StopShowTimer() {
show_timer_.Stop();
}
void MenuController::StartCancelAllTimer() {
cancel_all_timer_.Start(FROM_HERE,
TimeDelta::FromMilliseconds(kCloseOnExitTime),
this, &MenuController::CancelAll);
}
void MenuController::StopCancelAllTimer() {
cancel_all_timer_.Stop();
}
gfx::Rect MenuController::CalculateMenuBounds(MenuItemView* item,
bool prefer_leading,
bool* is_leading) {
DCHECK(item);
SubmenuView* submenu = item->GetSubmenu();
DCHECK(submenu);
gfx::Size pref = submenu->GetScrollViewContainer()->GetPreferredSize();
// For comboboxes, ensure the menu is at least as wide as the anchor.
if (is_combobox_)
pref.set_width(std::max(pref.width(), state_.initial_bounds.width()));
// Don't let the menu go too wide.
pref.set_width(std::min(pref.width(),
item->GetDelegate()->GetMaxWidthForMenu(item)));
if (!state_.monitor_bounds.IsEmpty())
pref.set_width(std::min(pref.width(), state_.monitor_bounds.width()));
// Assume we can honor prefer_leading.
*is_leading = prefer_leading;
int x, y;
const MenuConfig& menu_config = MenuConfig::instance();
if (!item->GetParentMenuItem()) {
// First item, position relative to initial location.
x = state_.initial_bounds.x();
// Offsets for context menu prevent menu items being selected by
// simply opening the menu (bug 142992).
if (menu_config.offset_context_menus && state_.context_menu)
x += 1;
y = state_.initial_bounds.bottom();
if (state_.anchor == MENU_ANCHOR_TOPRIGHT) {
x = x + state_.initial_bounds.width() - pref.width();
if (menu_config.offset_context_menus && state_.context_menu)
x -= 1;
} else if (state_.anchor == MENU_ANCHOR_BOTTOMCENTER) {
x = x - (pref.width() - state_.initial_bounds.width()) / 2;
if (pref.height() >
state_.initial_bounds.y() + kCenteredContextMenuYOffset) {
// Menu does not fit above the anchor. We move it to below.
y = state_.initial_bounds.y() - kCenteredContextMenuYOffset;
} else {
y = std::max(0, state_.initial_bounds.y() - pref.height()) +
kCenteredContextMenuYOffset;
}
}
if (!state_.monitor_bounds.IsEmpty() &&
y + pref.height() > state_.monitor_bounds.bottom()) {
// The menu doesn't fit fully below the button on the screen. The menu
// position with respect to the bounds will be preserved if it has
// already been drawn. When the requested positioning is below the bounds
// it will shrink the menu to make it fit below.
// If the requested positioning is best fit, it will first try to fit the
// menu below. If that does not fit it will try to place it above. If
// that will not fit it will place it at the bottom of the work area and
// moving it off the initial_bounds region to avoid overlap.
// In all other requested position styles it will be flipped above and
// the height will be shrunken to the usable height.
if (item->actual_menu_position() == MenuItemView::POSITION_BELOW_BOUNDS) {
pref.set_height(std::min(pref.height(),
state_.monitor_bounds.bottom() - y));
} else if (item->actual_menu_position() ==
MenuItemView::POSITION_BEST_FIT) {
MenuItemView::MenuPosition orientation =
MenuItemView::POSITION_BELOW_BOUNDS;
if (state_.monitor_bounds.height() < pref.height()) {
// Handle very tall menus.
pref.set_height(state_.monitor_bounds.height());
y = state_.monitor_bounds.y();
} else if (state_.monitor_bounds.y() + pref.height() <
state_.initial_bounds.y()) {
// Flipping upwards if there is enough space.
y = state_.initial_bounds.y() - pref.height();
orientation = MenuItemView::POSITION_ABOVE_BOUNDS;
} else {
// It is allowed to move the menu a bit around in order to get the
// best fit and to avoid showing scroll elements.
y = state_.monitor_bounds.bottom() - pref.height();
}
if (orientation == MenuItemView::POSITION_BELOW_BOUNDS) {
// The menu should never overlap the owning button. So move it.
// We use the anchor view style to determine the preferred position
// relative to the owning button.
if (state_.anchor == MENU_ANCHOR_TOPLEFT) {
// The menu starts with the same x coordinate as the owning button.
if (x + state_.initial_bounds.width() + pref.width() >
state_.monitor_bounds.right())
x -= pref.width(); // Move the menu to the left of the button.
else
x += state_.initial_bounds.width(); // Move the menu right.
} else {
// The menu should end with the same x coordinate as the owning
// button.
if (state_.monitor_bounds.x() >
state_.initial_bounds.x() - pref.width())
x = state_.initial_bounds.right(); // Move right of the button.
else
x = state_.initial_bounds.x() - pref.width(); // Move left.
}
}
item->set_actual_menu_position(orientation);
} else {
pref.set_height(std::min(pref.height(),
state_.initial_bounds.y() - state_.monitor_bounds.y()));
y = state_.initial_bounds.y() - pref.height();
item->set_actual_menu_position(MenuItemView::POSITION_ABOVE_BOUNDS);
}
} else if (item->actual_menu_position() ==
MenuItemView::POSITION_ABOVE_BOUNDS) {
pref.set_height(std::min(pref.height(),
state_.initial_bounds.y() - state_.monitor_bounds.y()));
y = state_.initial_bounds.y() - pref.height();
} else {
item->set_actual_menu_position(MenuItemView::POSITION_BELOW_BOUNDS);
}
if (state_.monitor_bounds.width() != 0 &&
menu_config.offset_context_menus && state_.context_menu) {
if (x + pref.width() > state_.monitor_bounds.right())
x = state_.initial_bounds.x() - pref.width() - 1;
if (x < state_.monitor_bounds.x())
x = state_.monitor_bounds.x();
}
} else {
// Not the first menu; position it relative to the bounds of the menu
// item.
gfx::Point item_loc;
View::ConvertPointToScreen(item, &item_loc);
// We must make sure we take into account the UI layout. If the layout is
// RTL, then a 'leading' menu is positioned to the left of the parent menu
// item and not to the right.
bool layout_is_rtl = base::i18n::IsRTL();
bool create_on_the_right = (prefer_leading && !layout_is_rtl) ||
(!prefer_leading && layout_is_rtl);
int submenu_horizontal_inset = menu_config.submenu_horizontal_inset;
if (create_on_the_right) {
x = item_loc.x() + item->width() - submenu_horizontal_inset;
if (state_.monitor_bounds.width() != 0 &&
x + pref.width() > state_.monitor_bounds.right()) {
if (layout_is_rtl)
*is_leading = true;
else
*is_leading = false;
x = item_loc.x() - pref.width() + submenu_horizontal_inset;
}
} else {
x = item_loc.x() - pref.width() + submenu_horizontal_inset;
if (state_.monitor_bounds.width() != 0 && x < state_.monitor_bounds.x()) {
if (layout_is_rtl)
*is_leading = false;
else
*is_leading = true;
x = item_loc.x() + item->width() - submenu_horizontal_inset;
}
}
y = item_loc.y() - menu_config.menu_vertical_border_size;
if (state_.monitor_bounds.width() != 0) {
pref.set_height(std::min(pref.height(), state_.monitor_bounds.height()));
if (y + pref.height() > state_.monitor_bounds.bottom())
y = state_.monitor_bounds.bottom() - pref.height();
if (y < state_.monitor_bounds.y())
y = state_.monitor_bounds.y();
}
}
if (state_.monitor_bounds.width() != 0) {
if (x + pref.width() > state_.monitor_bounds.right())
x = state_.monitor_bounds.right() - pref.width();
if (x < state_.monitor_bounds.x())
x = state_.monitor_bounds.x();
}
return gfx::Rect(x, y, pref.width(), pref.height());
}
gfx::Rect MenuController::CalculateBubbleMenuBounds(MenuItemView* item,
bool prefer_leading,
bool* is_leading) {
DCHECK(item);
DCHECK(!item->GetParentMenuItem());
// Assume we can honor prefer_leading.
*is_leading = prefer_leading;
SubmenuView* submenu = item->GetSubmenu();
DCHECK(submenu);
gfx::Size pref = submenu->GetScrollViewContainer()->GetPreferredSize();
const gfx::Rect& owner_bounds = pending_state_.initial_bounds;
// First the size gets reduced to the possible space.
if (!state_.monitor_bounds.IsEmpty()) {
int max_width = state_.monitor_bounds.width();
int max_height = state_.monitor_bounds.height();
// In case of bubbles, the maximum width is limited by the space
// between the display corner and the target area + the tip size.
if (state_.anchor == MENU_ANCHOR_BUBBLE_LEFT) {
max_width = owner_bounds.x() - state_.monitor_bounds.x() +
kBubbleTipSizeLeftRight;
} else if (state_.anchor == MENU_ANCHOR_BUBBLE_RIGHT) {
max_width = state_.monitor_bounds.right() - owner_bounds.right() +
kBubbleTipSizeLeftRight;
} else if (state_.anchor == MENU_ANCHOR_BUBBLE_ABOVE) {
max_height = owner_bounds.y() - state_.monitor_bounds.y() +
kBubbleTipSizeTopBottom;
} else if (state_.anchor == MENU_ANCHOR_BUBBLE_BELOW) {
max_height = state_.monitor_bounds.bottom() - owner_bounds.bottom() +
kBubbleTipSizeTopBottom;
}
// The space for the menu to cover should never get empty.
DCHECK_GE(max_width, kBubbleTipSizeLeftRight);
DCHECK_GE(max_height, kBubbleTipSizeTopBottom);
pref.set_width(std::min(pref.width(), max_width));
pref.set_height(std::min(pref.height(), max_height));
}
// Also make sure that the menu does not go too wide.
pref.set_width(std::min(pref.width(),
item->GetDelegate()->GetMaxWidthForMenu(item)));
int x, y;
if (state_.anchor == MENU_ANCHOR_BUBBLE_ABOVE ||
state_.anchor == MENU_ANCHOR_BUBBLE_BELOW) {
if (state_.anchor == MENU_ANCHOR_BUBBLE_ABOVE)
y = owner_bounds.y() - pref.height() + kBubbleTipSizeTopBottom;
else
y = owner_bounds.bottom() - kBubbleTipSizeTopBottom;
x = owner_bounds.CenterPoint().x() - pref.width() / 2;
int x_old = x;
if (x < state_.monitor_bounds.x()) {
x = state_.monitor_bounds.x();
} else if (x + pref.width() > state_.monitor_bounds.right()) {
x = state_.monitor_bounds.right() - pref.width();
}
submenu->GetScrollViewContainer()->SetBubbleArrowOffset(
pref.width() / 2 - x + x_old);
} else {
if (state_.anchor == MENU_ANCHOR_BUBBLE_RIGHT)
x = owner_bounds.right() - kBubbleTipSizeLeftRight;
else
x = owner_bounds.x() - pref.width() + kBubbleTipSizeLeftRight;
y = owner_bounds.CenterPoint().y() - pref.height() / 2;
int y_old = y;
if (y < state_.monitor_bounds.y()) {
y = state_.monitor_bounds.y();
} else if (y + pref.height() > state_.monitor_bounds.bottom()) {
y = state_.monitor_bounds.bottom() - pref.height();
}
submenu->GetScrollViewContainer()->SetBubbleArrowOffset(
pref.height() / 2 - y + y_old);
}
return gfx::Rect(x, y, pref.width(), pref.height());
}
// static
int MenuController::MenuDepth(MenuItemView* item) {
return item ? (MenuDepth(item->GetParentMenuItem()) + 1) : 0;
}
void MenuController::IncrementSelection(
SelectionIncrementDirectionType direction) {
MenuItemView* item = pending_state_.item;
DCHECK(item);
if (pending_state_.submenu_open && item->HasSubmenu() &&
item->GetSubmenu()->IsShowing()) {
// A menu is selected and open, but none of its children are selected,
// select the first menu item that is visible and enabled.
if (item->GetSubmenu()->GetMenuItemCount()) {
MenuItemView* to_select = FindInitialSelectableMenuItem(item, direction);
SetInitialHotTrackedView(to_select, direction);
return;
}
}
if (item->has_children()) {
CustomButton* button = GetFirstHotTrackedView(item);
if (button) {
DCHECK_EQ(hot_button_, button);
SetHotTrackedButton(nullptr);
}
bool direction_is_down = direction == INCREMENT_SELECTION_DOWN;
View* to_make_hot = button
? GetNextFocusableView(item, button, direction_is_down)
: GetInitialFocusableView(item, direction_is_down);
CustomButton* hot_button = CustomButton::AsCustomButton(to_make_hot);
if (hot_button) {
SetHotTrackedButton(hot_button);
return;
}
}
MenuItemView* parent = item->GetParentMenuItem();
if (parent) {
int parent_count = parent->GetSubmenu()->GetMenuItemCount();
if (parent_count > 1) {
for (int i = 0; i < parent_count; ++i) {
if (parent->GetSubmenu()->GetMenuItemAt(i) == item) {
MenuItemView* to_select =
FindNextSelectableMenuItem(parent, i, direction);
SetInitialHotTrackedView(to_select, direction);
break;
}
}
}
}
}
MenuItemView* MenuController::FindInitialSelectableMenuItem(
MenuItemView* parent,
SelectionIncrementDirectionType direction) {
return FindNextSelectableMenuItem(
parent, direction == INCREMENT_SELECTION_DOWN ? -1 : 0, direction);
}
MenuItemView* MenuController::FindNextSelectableMenuItem(
MenuItemView* parent,
int index,
SelectionIncrementDirectionType direction) {
int parent_count = parent->GetSubmenu()->GetMenuItemCount();
int stop_index = (index + parent_count) % parent_count;
bool include_all_items =
(index == -1 && direction == INCREMENT_SELECTION_DOWN) ||
(index == 0 && direction == INCREMENT_SELECTION_UP);
int delta = direction == INCREMENT_SELECTION_UP ? -1 : 1;
// Loop through the menu items skipping any invisible menus. The loop stops
// when we wrap or find a visible and enabled child.
do {
index = (index + delta + parent_count) % parent_count;
if (index == stop_index && !include_all_items)
return NULL;
MenuItemView* child = parent->GetSubmenu()->GetMenuItemAt(index);
if (child->visible() && child->enabled())
return child;
} while (index != stop_index);
return NULL;
}
void MenuController::OpenSubmenuChangeSelectionIfCan() {
MenuItemView* item = pending_state_.item;
if (!item->HasSubmenu() || !item->enabled())
return;
MenuItemView* to_select = NULL;
if (item->GetSubmenu()->GetMenuItemCount() > 0)
to_select = FindInitialSelectableMenuItem(item, INCREMENT_SELECTION_DOWN);
if (to_select) {
SetSelection(to_select, SELECTION_UPDATE_IMMEDIATELY);
return;
}
// No menu items, just show the sub-menu.
SetSelection(item, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
}
void MenuController::CloseSubmenu() {
MenuItemView* item = state_.item;
DCHECK(item);
if (!item->GetParentMenuItem())
return;
if (item->HasSubmenu() && item->GetSubmenu()->IsShowing())
SetSelection(item, SELECTION_UPDATE_IMMEDIATELY);
else if (item->GetParentMenuItem()->GetParentMenuItem())
SetSelection(item->GetParentMenuItem(), SELECTION_UPDATE_IMMEDIATELY);
}
MenuController::SelectByCharDetails MenuController::FindChildForMnemonic(
MenuItemView* parent,
base::char16 key,
bool (*match_function)(MenuItemView* menu, base::char16 mnemonic)) {
SubmenuView* submenu = parent->GetSubmenu();
DCHECK(submenu);
SelectByCharDetails details;
for (int i = 0, menu_item_count = submenu->GetMenuItemCount();
i < menu_item_count; ++i) {
MenuItemView* child = submenu->GetMenuItemAt(i);
if (child->enabled() && child->visible()) {
if (child == pending_state_.item)
details.index_of_item = i;
if (match_function(child, key)) {
if (details.first_match == -1)
details.first_match = i;
else
details.has_multiple = true;
if (details.next_match == -1 && details.index_of_item != -1 &&
i > details.index_of_item)
details.next_match = i;
}
}
}
return details;
}
void MenuController::AcceptOrSelect(MenuItemView* parent,
const SelectByCharDetails& details) {
// This should only be invoked if there is a match.
DCHECK(details.first_match != -1);
DCHECK(parent->HasSubmenu());
SubmenuView* submenu = parent->GetSubmenu();
DCHECK(submenu);
if (!details.has_multiple) {
// There's only one match, activate it (or open if it has a submenu).
if (submenu->GetMenuItemAt(details.first_match)->HasSubmenu()) {
SetSelection(submenu->GetMenuItemAt(details.first_match),
SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
} else {
Accept(submenu->GetMenuItemAt(details.first_match), 0);
}
} else if (details.index_of_item == -1 || details.next_match == -1) {
SetSelection(submenu->GetMenuItemAt(details.first_match),
SELECTION_DEFAULT);
} else {
SetSelection(submenu->GetMenuItemAt(details.next_match),
SELECTION_DEFAULT);
}
}
void MenuController::SelectByChar(base::char16 character) {
// Do not process while performing drag-and-drop
if (!blocking_run_)
return;
if (!character)
return;
base::char16 char_array[] = { character, 0 };
base::char16 key = base::i18n::ToLower(char_array)[0];
MenuItemView* item = pending_state_.item;
if (!item->HasSubmenu() || !item->GetSubmenu()->IsShowing())
item = item->GetParentMenuItem();
DCHECK(item);
DCHECK(item->HasSubmenu());
DCHECK(item->GetSubmenu());
if (item->GetSubmenu()->GetMenuItemCount() == 0)
return;
// Look for matches based on mnemonic first.
SelectByCharDetails details =
FindChildForMnemonic(item, key, &MatchesMnemonic);
if (details.first_match != -1) {
AcceptOrSelect(item, details);
return;
}
if (is_combobox_) {
item->GetSubmenu()->GetPrefixSelector()->InsertText(char_array);
} else {
// If no mnemonics found, look at first character of titles.
details = FindChildForMnemonic(item, key, &TitleMatchesMnemonic);
if (details.first_match != -1)
AcceptOrSelect(item, details);
}
}
void MenuController::RepostEventAndCancel(SubmenuView* source,
const ui::LocatedEvent* event) {
// Cancel can lead to the deletion |source| so we save the view and window to
// be used when reposting the event.
gfx::Point screen_loc(event->location());
View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
#if defined(OS_WIN) || defined(OS_CHROMEOS)
gfx::NativeView native_view = source->GetWidget()->GetNativeView();
gfx::NativeWindow window = nullptr;
if (native_view) {
display::Screen* screen = display::Screen::GetScreen();
window = screen->GetWindowAtScreenPoint(screen_loc);
}
#endif
#if defined(OS_WIN)
if (event->IsMouseEvent() || event->IsTouchEvent()) {
bool async_run = async_run_;
if (state_.item) {
state_.item->GetRootMenuItem()->GetSubmenu()->ReleaseCapture();
RepostEventImpl(event, screen_loc, native_view, window);
} else {
// We some times get an event after closing all the menus. Ignore it. Make
// sure the menu is in fact not visible. If the menu is visible, then
// we're in a bad state where we think the menu isn't visibile but it is.
DCHECK(!source->GetWidget()->IsVisible());
}
// We're going to close and we own the event capture. We need to repost the
// event, otherwise the window the user clicked on won't get the event.
// RepostEvent(source, event, screen_loc, native_view, window);
// MenuController may have been deleted if |async_run_| so check for an
// active
// instance before accessing member variables.
if (!GetActiveInstance()) {
DCHECK(async_run);
return;
}
}
#endif
// Determine target to see if a complete or partial close of the menu should
// occur.
ExitType exit_type = EXIT_ALL;
if (!menu_stack_.empty()) {
// We're running nested menus. Only exit all if the mouse wasn't over one
// of the menus from the last run.
MenuPart last_part = GetMenuPartByScreenCoordinateUsingMenu(
menu_stack_.back().first.item, screen_loc);
if (last_part.type != MenuPart::NONE)
exit_type = EXIT_OUTERMOST;
}
Cancel(exit_type);
#if defined(OS_CHROMEOS)
// We're going to exit the menu and want to repost the event so that is
// is handled normally after the context menu has exited. We call
// RepostEvent after Cancel so that event capture has been released so
// that finding the event target is unaffected by the current capture.
RepostEventImpl(event, screen_loc, native_view, window);
#endif
}
void MenuController::SetDropMenuItem(
MenuItemView* new_target,
MenuDelegate::DropPosition new_position) {
if (new_target == drop_target_ && new_position == drop_position_)
return;
if (drop_target_) {
drop_target_->GetParentMenuItem()->GetSubmenu()->SetDropMenuItem(
NULL, MenuDelegate::DROP_NONE);
}
drop_target_ = new_target;
drop_position_ = new_position;
if (drop_target_) {
drop_target_->GetParentMenuItem()->GetSubmenu()->SetDropMenuItem(
drop_target_, drop_position_);
}
}
void MenuController::UpdateScrolling(const MenuPart& part) {
if (!part.is_scroll() && !scroll_task_.get())
return;
if (!scroll_task_.get())
scroll_task_.reset(new MenuScrollTask());
scroll_task_->Update(part);
}
void MenuController::StopScrolling() {
scroll_task_.reset(NULL);
}
void MenuController::UpdateActiveMouseView(SubmenuView* event_source,
const ui::MouseEvent& event,
View* target_menu) {
View* target = NULL;
gfx::Point target_menu_loc(event.location());
if (target_menu && target_menu->has_children()) {
// Locate the deepest child view to send events to. This code assumes we
// don't have to walk up the tree to find a view interested in events. This
// is currently true for the cases we are embedding views, but if we embed
// more complex hierarchies it'll need to change.
View::ConvertPointToScreen(event_source->GetScrollViewContainer(),
&target_menu_loc);
View::ConvertPointFromScreen(target_menu, &target_menu_loc);
target = target_menu->GetEventHandlerForPoint(target_menu_loc);
if (target == target_menu || !target->enabled())
target = NULL;
}
View* active_mouse_view = GetActiveMouseView();
if (target != active_mouse_view) {
SendMouseCaptureLostToActiveView();
active_mouse_view = target;
SetActiveMouseView(active_mouse_view);
if (active_mouse_view) {
gfx::Point target_point(target_menu_loc);
View::ConvertPointToTarget(
target_menu, active_mouse_view, &target_point);
ui::MouseEvent mouse_entered_event(ui::ET_MOUSE_ENTERED, target_point,
target_point, ui::EventTimeForNow(), 0,
0);
active_mouse_view->OnMouseEntered(mouse_entered_event);
ui::MouseEvent mouse_pressed_event(
ui::ET_MOUSE_PRESSED, target_point, target_point,
ui::EventTimeForNow(), event.flags(), event.changed_button_flags());
active_mouse_view->OnMousePressed(mouse_pressed_event);
}
}
if (active_mouse_view) {
gfx::Point target_point(target_menu_loc);
View::ConvertPointToTarget(target_menu, active_mouse_view, &target_point);
ui::MouseEvent mouse_dragged_event(
ui::ET_MOUSE_DRAGGED, target_point, target_point, ui::EventTimeForNow(),
event.flags(), event.changed_button_flags());
active_mouse_view->OnMouseDragged(mouse_dragged_event);
}
}
void MenuController::SendMouseReleaseToActiveView(SubmenuView* event_source,
const ui::MouseEvent& event) {
View* active_mouse_view = GetActiveMouseView();
if (!active_mouse_view)
return;
gfx::Point target_loc(event.location());
View::ConvertPointToScreen(event_source->GetScrollViewContainer(),
&target_loc);
View::ConvertPointFromScreen(active_mouse_view, &target_loc);
ui::MouseEvent release_event(ui::ET_MOUSE_RELEASED, target_loc, target_loc,
ui::EventTimeForNow(), event.flags(),
event.changed_button_flags());
// Reset active mouse view before sending mouse released. That way if it calls
// back to us, we aren't in a weird state.
SetActiveMouseView(NULL);
active_mouse_view->OnMouseReleased(release_event);
}
void MenuController::SendMouseCaptureLostToActiveView() {
View* active_mouse_view = GetActiveMouseView();
if (!active_mouse_view)
return;
// Reset the active_mouse_view_ before sending mouse capture lost. That way if
// it calls back to us, we aren't in a weird state.
SetActiveMouseView(NULL);
active_mouse_view->OnMouseCaptureLost();
}
void MenuController::SetActiveMouseView(View* view) {
if (view)
ViewStorage::GetInstance()->StoreView(active_mouse_view_id_, view);
else
ViewStorage::GetInstance()->RemoveView(active_mouse_view_id_);
}
View* MenuController::GetActiveMouseView() {
return ViewStorage::GetInstance()->RetrieveView(active_mouse_view_id_);
}
void MenuController::SetExitType(ExitType type) {
exit_type_ = type;
// Exit nested message loops as soon as possible. We do this as
// it's entirely possible for a Widget::CloseNow() task to be processed before
// the next native message. We quite the nested message loop as soon as
// possible to avoid having deleted views classes (such as widgets and
// rootviews) on the stack when the nested message loop stops.
TerminateNestedMessageLoopIfNecessary();
}
bool MenuController::TerminateNestedMessageLoopIfNecessary() {
// It is necessary to check both |async_run_| and |message_loop_depth_|
// because the topmost async menu could be nested in a sync parent menu.
bool quit_now = !async_run_ && exit_type_ != EXIT_NONE && message_loop_depth_;
if (quit_now)
message_loop_->QuitNow();
return quit_now;
}
void MenuController::ExitAsyncRun() {
if (!async_run_)
return;
bool nested = delegate_stack_.size() > 1;
// ExitMenuRun unwinds nested delegates
internal::MenuControllerDelegate* delegate = delegate_;
MenuItemView* result = ExitMenuRun();
delegate->OnMenuClosed(internal::MenuControllerDelegate::NOTIFY_DELEGATE,
result, accept_event_flags_);
// MenuController may have been deleted by |delegate|.
if (GetActiveInstance() && nested && exit_type_ == EXIT_ALL)
ExitAsyncRun();
}
MenuItemView* MenuController::ExitMenuRun() {
// Release the lock which prevents Chrome from shutting down while the menu is
// showing.
if (async_run_ && ViewsDelegate::GetInstance())
ViewsDelegate::GetInstance()->ReleaseRef();
// Close any open menus.
SetSelection(nullptr, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
#if defined(OS_WIN)
// On Windows, if we select the menu item by touch and if the window at the
// location is another window on the same thread, that window gets a
// WM_MOUSEACTIVATE message and ends up activating itself, which is not
// correct. We workaround this by setting a property on the window at the
// current cursor location. We check for this property in our
// WM_MOUSEACTIVATE handler and don't activate the window if the property is
// set.
if (item_selected_by_touch_) {
item_selected_by_touch_ = false;
POINT cursor_pos;
::GetCursorPos(&cursor_pos);
HWND window = ::WindowFromPoint(cursor_pos);
if (::GetWindowThreadProcessId(window, nullptr) == ::GetCurrentThreadId()) {
::SetProp(window, ui::kIgnoreTouchMouseActivateForWindow,
reinterpret_cast<HANDLE>(true));
}
}
#endif
std::unique_ptr<MenuButton::PressedLock> nested_pressed_lock;
bool nested_menu = !menu_stack_.empty();
if (nested_menu) {
DCHECK(!menu_stack_.empty());
// We're running from within a menu, restore the previous state.
// The menus are already showing, so we don't have to show them.
state_ = menu_stack_.back().first;
pending_state_ = menu_stack_.back().first;
hot_button_ = state_.hot_button;
nested_pressed_lock = std::move(menu_stack_.back().second);
menu_stack_.pop_back();
// Even though the menus are nested, there may not be nested delegates.
if (delegate_stack_.size() > 1) {
delegate_stack_.pop_back();
delegate_ = delegate_stack_.back().first;
async_run_ = delegate_stack_.back().second;
}
} else {
#if defined(USE_AURA)
menu_pre_target_handler_.reset();
#endif
showing_ = false;
did_capture_ = false;
}
MenuItemView* result = result_;
// In case we're nested, reset |result_|.
result_ = nullptr;
if (exit_type_ == EXIT_OUTERMOST) {
SetExitType(EXIT_NONE);
} else {
if (nested_menu && result) {
// We're nested and about to return a value. The caller might enter
// another blocking loop. We need to make sure all menus are hidden
// before that happens otherwise the menus will stay on screen.
CloseAllNestedMenus();
SetSelection(nullptr, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
// Set exit_all_, which makes sure all nested loops exit immediately.
if (exit_type_ != EXIT_DESTROYED)
SetExitType(EXIT_ALL);
} else {
TerminateNestedMessageLoopIfNecessary();
}
}
// Reset our pressed lock and hot-tracked state to the previous state's, if
// they were active. The lock handles the case if the button was destroyed.
pressed_lock_ = std::move(nested_pressed_lock);
if (hot_button_)
hot_button_->SetHotTracked(true);
return result;
}
void MenuController::HandleMouseLocation(SubmenuView* source,
const gfx::Point& mouse_location) {
if (showing_submenu_)
return;
// Ignore mouse events if we're closing the menu.
if (exit_type_ != EXIT_NONE)
return;
MenuPart part = GetMenuPart(source, mouse_location);
UpdateScrolling(part);
if (!blocking_run_)
return;
if (part.type == MenuPart::NONE && ShowSiblingMenu(source, mouse_location))
return;
if (part.type == MenuPart::MENU_ITEM && part.menu) {
SetSelection(part.menu, SELECTION_OPEN_SUBMENU);
} else if (!part.is_scroll() && pending_state_.item &&
pending_state_.item->GetParentMenuItem() &&
(!pending_state_.item->HasSubmenu() ||
!pending_state_.item->GetSubmenu()->IsShowing())) {
// On exit if the user hasn't selected an item with a submenu, move the
// selection back to the parent menu item.
SetSelection(pending_state_.item->GetParentMenuItem(),
SELECTION_OPEN_SUBMENU);
}
}
void MenuController::SetInitialHotTrackedView(
MenuItemView* item,
SelectionIncrementDirectionType direction) {
if (!item)
return;
SetSelection(item, SELECTION_DEFAULT);
View* hot_view =
GetInitialFocusableView(item, direction == INCREMENT_SELECTION_DOWN);
SetHotTrackedButton(CustomButton::AsCustomButton(hot_view));
}
void MenuController::SetHotTrackedButton(CustomButton* hot_button) {
if (hot_button == hot_button_) {
// Hot-tracked state may change outside of the MenuController. Correct it.
if (hot_button && !hot_button->IsHotTracked()) {
hot_button->SetHotTracked(true);
hot_button->NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);
}
return;
}
if (hot_button_)
hot_button_->SetHotTracked(false);
hot_button_ = hot_button;
if (hot_button) {
hot_button->SetHotTracked(true);
hot_button->NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);
}
}
} // namespace views