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chromium / chromium / src / 6f3bb6ca5a2e423fc9dda71c164c7e8ae2a8eae7 / . / chrome / views / chrome_menu.cc
blob: 360f8c44f57473b80c89a26106d104ad9a5b8274 [file] [log] [blame]
// Copyright (c) 2006-2008 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 "chrome/views/chrome_menu.h"
#include <windows.h>
#include <uxtheme.h>
#include <Vssym32.h>
#include "base/base_drag_source.h"
#include "base/gfx/native_theme.h"
#include "base/gfx/skia_utils.h"
#include "base/message_loop.h"
#include "base/task.h"
#include "base/timer.h"
#include "base/win_util.h"
#include "chrome/browser/drag_utils.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/common/gfx/color_utils.h"
#include "chrome/common/l10n_util.h"
#include "chrome/common/os_exchange_data.h"
#include "chrome/views/border.h"
#include "chrome/views/hwnd_view_container.h"
#include "chrome/views/root_view.h"
#include "generated_resources.h"
// Margins between the top of the item and the label.
static const int kItemTopMargin = 3;
// Margins between the bottom of the item and the label.
static const int kItemBottomMargin = 4;
// Margins between the left of the item and the icon.
static const int kItemLeftMargin = 4;
// Padding between the label and submenu arrow.
static const int kLabelToArrowPadding = 10;
// Padding between the arrow and the edge.
static const int kArrowToEdgePadding = 5;
// Padding between the icon and label.
static const int kIconToLabelPadding = 8;
// Padding between the gutter and label.
static const int kGutterToLabel = 5;
// Height of the scroll arrow.
// This goes up to 4 with large fonts, but this is close enough for now.
static const int kScrollArrowHeight = 3;
// Size of the check. This comes from the OS.
static int check_width;
static int check_height;
// Size of the submenu arrow. This comes from the OS.
static int arrow_width;
static int arrow_height;
// Width of the gutter. Only used if render_gutter is true.
static int gutter_width;
// Margins between the right of the item and the label.
static int item_right_margin;
// X-coordinate of where the label starts.
static int label_start;
// Height of the separator.
static int separator_height;
// Padding around the edges of the submenu.
static const int kSubmenuBorderSize = 3;
// Amount to inset submenus.
static const int kSubmenuHorizontalInset = 3;
// Delay, in ms, between when menus are selected are moused over and the menu
// appears.
static const int kShowDelay = 400;
// Amount of time from when the drop exits the menu and the menu is hidden.
static const int kCloseOnExitTime = 1200;
// Height of the drop indicator. This should be an event number.
static const int kDropIndicatorHeight = 2;
// Color of the drop indicator.
static const SkColor kDropIndicatorColor = SK_ColorBLACK;
// Whether or not the gutter should be rendered. The gutter is specific to
// Vista.
static bool render_gutter = false;
// Max width of a menu. There does not appear to be an OS value for this, yet
// both IE and FF restrict the max width of a menu.
static const LONG kMaxMenuWidth = 400;
// Period of the scroll timer (in milliseconds).
static const int kScrollTimerMS = 30;
// Preferred height of menu items. Reset every time a menu is run.
static int pref_menu_height;
using gfx::NativeTheme;
namespace ChromeViews {
// Calculates all sizes that we can from the OS.
//
// This is invoked prior to Running a menu.
void UpdateMenuPartSizes() {
HDC dc = GetDC(NULL);
RECT bounds = { 0, 0, 200, 200 };
SIZE check_size;
if (NativeTheme::instance()->GetThemePartSize(
NativeTheme::MENU, dc, MENU_POPUPCHECK, MC_CHECKMARKNORMAL, &bounds,
TS_TRUE, &check_size) == S_OK) {
check_width = check_size.cx;
check_height = check_size.cy;
} else {
check_width = GetSystemMetrics(SM_CXMENUCHECK);
check_height = GetSystemMetrics(SM_CYMENUCHECK);
}
SIZE arrow_size;
if (NativeTheme::instance()->GetThemePartSize(
NativeTheme::MENU, dc, MENU_POPUPSUBMENU, MSM_NORMAL, &bounds,
TS_TRUE, &arrow_size) == S_OK) {
arrow_width = arrow_size.cx;
arrow_height = arrow_size.cy;
} else {
// Sadly I didn't see a specify metrics for this.
arrow_width = GetSystemMetrics(SM_CXMENUCHECK);
arrow_height = GetSystemMetrics(SM_CYMENUCHECK);
}
SIZE gutter_size;
if (NativeTheme::instance()->GetThemePartSize(
NativeTheme::MENU, dc, MENU_POPUPGUTTER, MSM_NORMAL, &bounds,
TS_TRUE, &gutter_size) == S_OK) {
gutter_width = gutter_size.cx;
render_gutter = true;
} else {
gutter_width = 0;
render_gutter = false;
}
SIZE separator_size;
if (NativeTheme::instance()->GetThemePartSize(
NativeTheme::MENU, dc, MENU_POPUPSEPARATOR, MSM_NORMAL, &bounds,
TS_TRUE, &separator_size) == S_OK) {
separator_height = separator_size.cy;
} else {
separator_height = GetSystemMetrics(SM_CYMENU) / 2;
}
item_right_margin = kLabelToArrowPadding + arrow_width + kArrowToEdgePadding;
label_start = kItemLeftMargin + check_width + kIconToLabelPadding;
if (render_gutter)
label_start += gutter_width + kGutterToLabel;
ReleaseDC(NULL, dc);
CSize pref;
MenuItemView menu_item(NULL);
menu_item.SetTitle(L"blah"); // Text doesn't matter here.
menu_item.GetPreferredSize(&pref);
pref_menu_height = pref.cy;
}
namespace {
// Convenience for scrolling the view such that the origin is visible.
static void ScrollToVisible(View* view) {
view->ScrollRectToVisible(0, 0, view->width(), view->height());
}
// 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 MenuScrollTask {
public:
MenuScrollTask() : submenu_(NULL) {
pixels_per_second_ = 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_ = Time::Now();
start_y_ = part.submenu->GetVisibleBounds().y();
submenu_ = new_menu;
is_scrolling_up_ = new_is_up;
if (!scrolling_timer_.IsRunning()) {
scrolling_timer_.Start(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>(
(Time::Now() - start_scroll_time_).InMilliseconds() *
pixels_per_second_ / 1000);
int target_y = start_y_;
if (is_scrolling_up_)
target_y = std::max(0, target_y - delta_y);
else
target_y = std::min(submenu_->height() - vis_rect.height(),
target_y + delta_y);
submenu_->ScrollRectToVisible(vis_rect.x(), target_y, vis_rect.width(),
vis_rect.height());
}
// SubmenuView being scrolled.
SubmenuView* submenu_;
// Direction scrolling.
bool is_scrolling_up_;
// Timer to periodically scroll.
base::RepeatingTimer<MenuScrollTask> scrolling_timer_;
// Time we started scrolling at.
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_EVIL_CONSTRUCTORS(MenuScrollTask);
};
// MenuScrollButton ------------------------------------------------------------
// MenuScrollButton is used for the scroll buttons when not all menu items fit
// on screen. MenuScrollButton forwards appropriate events to the
// MenuController.
class MenuScrollButton : public View {
public:
explicit MenuScrollButton(SubmenuView* host, bool is_up)
: host_(host),
is_up_(is_up),
// Make our height the same as that of other MenuItemViews.
pref_height_(pref_menu_height) {
}
virtual void GetPreferredSize(CSize* out) {
out->cx = kScrollArrowHeight * 2 - 1;
out->cy = pref_height_;
}
virtual bool CanDrop(const OSExchangeData& data) {
DCHECK(host_->GetMenuItem()->GetMenuController());
return true; // Always return true so that drop events are targeted to us.
}
virtual void OnDragEntered(const DropTargetEvent& event) {
DCHECK(host_->GetMenuItem()->GetMenuController());
host_->GetMenuItem()->GetMenuController()->OnDragEnteredScrollButton(
host_, is_up_);
}
virtual int OnDragUpdated(const DropTargetEvent& event) {
return DragDropTypes::DRAG_NONE;
}
virtual void OnDragExited() {
DCHECK(host_->GetMenuItem()->GetMenuController());
host_->GetMenuItem()->GetMenuController()->OnDragExitedScrollButton(host_);
}
virtual int OnPerformDrop(const DropTargetEvent& event) {
return DragDropTypes::DRAG_NONE;
}
virtual void Paint(ChromeCanvas* canvas) {
HDC dc = canvas->beginPlatformPaint();
// The background.
RECT item_bounds = { 0, 0, width(), height() };
NativeTheme::instance()->PaintMenuItemBackground(
NativeTheme::MENU, dc, MENU_POPUPITEM, MPI_NORMAL, false,
&item_bounds);
// Then the arrow.
int x = width() / 2;
int y = (height() - kScrollArrowHeight) / 2;
int delta_y = 1;
if (!is_up_) {
delta_y = -1;
y += kScrollArrowHeight;
}
SkColor arrow_color = color_utils::GetSysSkColor(COLOR_MENUTEXT);
for (int i = 0; i < kScrollArrowHeight; ++i, --x, y += delta_y)
canvas->FillRectInt(arrow_color, x, y, (i * 2) + 1, 1);
canvas->endPlatformPaint();
}
private:
// SubmenuView we were created for.
SubmenuView* host_;
// Direction of the button.
bool is_up_;
// Preferred height.
int pref_height_;
DISALLOW_EVIL_CONSTRUCTORS(MenuScrollButton);
};
// MenuScrollView --------------------------------------------------------------
// MenuScrollView is a viewport for the SubmenuView. It's reason to exist is so
// that ScrollRectToVisible works.
//
// NOTE: It is possible to use ScrollView directly (after making it deal with
// null scrollbars), but clicking on a child of ScrollView forces the window to
// become active, which we don't want. As we really only need a fraction of
// what ScrollView does, we use a one off variant.
class MenuScrollView : public View {
public:
explicit MenuScrollView(View* child) {
AddChildView(child);
}
virtual void ScrollRectToVisible(int x, int y, int width, int height) {
// NOTE: this assumes we only want to scroll in the y direction.
View* child = GetContents();
// Convert y to view's coordinates.
y -= child->y();
CSize pref;
child->GetPreferredSize(&pref);
// Constrain y to make sure we don't show past the bottom of the view.
y = std::max(0, std::min(static_cast<int>(pref.cy) - this->height(), y));
child->SetY(-y);
}
// Returns the contents, which is the SubmenuView.
View* GetContents() {
return GetChildViewAt(0);
}
private:
DISALLOW_EVIL_CONSTRUCTORS(MenuScrollView);
};
// MenuScrollViewContainer -----------------------------------------------------
// MenuScrollViewContainer contains the SubmenuView (through a MenuScrollView)
// and two scroll buttons. The scroll buttons are only visible and enabled if
// the preferred height of the SubmenuView is bigger than our bounds.
class MenuScrollViewContainer : public View {
public:
explicit MenuScrollViewContainer(SubmenuView* content_view) {
scroll_up_button_ = new MenuScrollButton(content_view, true);
scroll_down_button_ = new MenuScrollButton(content_view, false);
AddChildView(scroll_up_button_);
AddChildView(scroll_down_button_);
scroll_view_ = new MenuScrollView(content_view);
AddChildView(scroll_view_);
SetBorder(
Border::CreateEmptyBorder(kSubmenuBorderSize, kSubmenuBorderSize,
kSubmenuBorderSize, kSubmenuBorderSize));
}
virtual void Paint(ChromeCanvas* canvas) {
HDC dc = canvas->beginPlatformPaint();
CRect bounds(0, 0, width(), height());
NativeTheme::instance()->PaintMenuBackground(
NativeTheme::MENU, dc, MENU_POPUPBACKGROUND, 0, &bounds);
canvas->endPlatformPaint();
}
View* scroll_down_button() { return scroll_down_button_; }
View* scroll_up_button() { return scroll_up_button_; }
virtual void Layout() {
gfx::Insets insets = GetInsets();
int x = insets.left();
int y = insets.top();
int width = View::width() - insets.width();
int content_height = height() - insets.height();
if (!scroll_up_button_->IsVisible()) {
scroll_view_->SetBounds(x, y, width, content_height);
scroll_view_->Layout();
return;
}
CSize pref;
scroll_up_button_->GetPreferredSize(&pref);
scroll_up_button_->SetBounds(x, y, width, pref.cy);
content_height -= pref.cy;
const int scroll_view_y = y + pref.cy;
scroll_down_button_->GetPreferredSize(&pref);
scroll_down_button_->SetBounds(x, height() - pref.cy - insets.top(),
width, pref.cy);
content_height -= pref.cy;
scroll_view_->SetBounds(x, scroll_view_y, width, content_height);
scroll_view_->Layout();
}
virtual void DidChangeBounds(const CRect& previous, const CRect& current) {
CSize content_pref;
scroll_view_->GetContents()->GetPreferredSize(&content_pref);
scroll_up_button_->SetVisible(content_pref.cy > height());
scroll_down_button_->SetVisible(content_pref.cy > height());
}
virtual void GetPreferredSize(CSize* out) {
scroll_view_->GetContents()->GetPreferredSize(out);
gfx::Insets insets = GetInsets();
out->cx += insets.width();
out->cy += insets.height();
}
private:
// The scroll buttons.
View* scroll_up_button_;
View* scroll_down_button_;
// The scroll view.
MenuScrollView* scroll_view_;
DISALLOW_EVIL_CONSTRUCTORS(MenuScrollViewContainer);
};
// MenuSeparator ---------------------------------------------------------------
// Renders a separator.
class MenuSeparator : public View {
public:
MenuSeparator() {
}
void Paint(ChromeCanvas* canvas) {
// The gutter is rendered before the background.
int start_x = 0;
int start_y = height() / 3;
HDC dc = canvas->beginPlatformPaint();
if (render_gutter) {
// If render_gutter is true, we're on Vista and need to render the
// gutter, then indent the separator from the gutter.
RECT gutter_bounds = { label_start - kGutterToLabel - gutter_width, 0, 0,
height() };
gutter_bounds.right = gutter_bounds.left + gutter_width;
NativeTheme::instance()->PaintMenuGutter(dc, MENU_POPUPGUTTER, MPI_NORMAL,
&gutter_bounds);
start_x = gutter_bounds.left + gutter_width;
start_y = 0;
}
RECT separator_bounds = { start_x, start_y, width(), height() };
NativeTheme::instance()->PaintMenuSeparator(dc, MENU_POPUPSEPARATOR,
MPI_NORMAL, &separator_bounds);
canvas->endPlatformPaint();
}
void GetPreferredSize(CSize* out) {
out->cx = 10; // Just in case we're the only item in a menu.
out->cy = separator_height;
}
private:
DISALLOW_EVIL_CONSTRUCTORS(MenuSeparator);
};
// MenuHostRootView ----------------------------------------------------------
// MenuHostRootView is the RootView of the window showing the menu.
// SubmenuView's scroll view is added as a child of MenuHostRootView.
// MenuHostRootView forwards relevant events to the MenuController.
//
// As all the menu items are owned by the root menu item, care must be taken
// such that when MenuHostRootView is deleted it doesn't delete the menu items.
class MenuHostRootView : public RootView {
public:
explicit MenuHostRootView(ViewContainer* container,
SubmenuView* submenu)
: RootView(container),
submenu_(submenu),
forward_drag_to_menu_controller_(true),
suspend_events_(false) {
#ifdef DEBUG_MENU
DLOG(INFO) << " new MenuHostRootView " << this;
#endif
}
virtual bool OnMousePressed(const MouseEvent& event) {
if (suspend_events_)
return true;
forward_drag_to_menu_controller_ =
((event.x() < 0 || event.y() < 0 || event.x() >= width() ||
event.y() >= height()) ||
!RootView::OnMousePressed(event));
if (forward_drag_to_menu_controller_)
GetMenuController()->OnMousePressed(submenu_, event);
return true;
}
virtual bool OnMouseDragged(const MouseEvent& event) {
if (suspend_events_)
return true;
if (forward_drag_to_menu_controller_) {
#ifdef DEBUG_MENU
DLOG(INFO) << " MenuHostRootView::OnMouseDragged source=" << submenu_;
#endif
GetMenuController()->OnMouseDragged(submenu_, event);
return true;
}
return RootView::OnMouseDragged(event);
}
virtual void OnMouseReleased(const MouseEvent& event, bool canceled) {
if (suspend_events_)
return;
RootView::OnMouseReleased(event, canceled);
if (forward_drag_to_menu_controller_) {
if (canceled) {
GetMenuController()->Cancel(true);
} else {
GetMenuController()->OnMouseReleased(submenu_, event);
}
forward_drag_to_menu_controller_ = false;
}
}
virtual void OnMouseMoved(const MouseEvent& event) {
if (suspend_events_)
return;
RootView::OnMouseMoved(event);
GetMenuController()->OnMouseMoved(submenu_, event);
}
virtual void ProcessOnMouseExited() {
if (suspend_events_)
return;
RootView::ProcessOnMouseExited();
}
virtual bool ProcessMouseWheelEvent(const MouseWheelEvent& e) {
// RootView::ProcessMouseWheelEvent forwards to the focused view. We don't
// have a focused view, so we need to override this then forward to
// the menu.
return submenu_->OnMouseWheel(e);
}
void SuspendEvents() {
suspend_events_ = true;
}
private:
MenuController* GetMenuController() {
return submenu_->GetMenuItem()->GetMenuController();
}
/// The SubmenuView we contain.
SubmenuView* submenu_;
// Whether mouse dragged/released should be forwarded to the MenuController.
bool forward_drag_to_menu_controller_;
// Whether events are suspended. If true, no events are forwarded to the
// MenuController.
bool suspend_events_;
DISALLOW_EVIL_CONSTRUCTORS(MenuHostRootView);
};
// MenuHost ------------------------------------------------------------------
// MenuHost is the window responsible for showing a single menu.
//
// Similar to MenuHostRootView, care must be taken such that when MenuHost is
// deleted, it doesn't delete the menu items. MenuHost is closed via a
// DelayedClosed, which avoids timing issues with deleting the window while
// capture or events are directed at it.
class MenuHost : public HWNDViewContainer {
public:
MenuHost(SubmenuView* submenu)
: closed_(false),
submenu_(submenu),
owns_capture_(false) {
set_window_style(WS_POPUP);
set_initial_class_style(
(win_util::GetWinVersion() < win_util::WINVERSION_XP) ?
0 : CS_DROPSHADOW);
is_mouse_down_ =
((GetKeyState(VK_LBUTTON) & 0x80) ||
(GetKeyState(VK_RBUTTON) & 0x80) ||
(GetKeyState(VK_MBUTTON) & 0x80) ||
(GetKeyState(VK_XBUTTON1) & 0x80) ||
(GetKeyState(VK_XBUTTON2) & 0x80));
// Mouse clicks shouldn't give us focus.
set_window_ex_style(WS_EX_TOPMOST | WS_EX_NOACTIVATE);
}
void Init(HWND parent,
const gfx::Rect& bounds,
View* contents_view,
bool do_capture) {
HWNDViewContainer::Init(parent, bounds, true);
SetContentsView(contents_view);
// We don't want to take focus away from the hosting window.
ShowWindow(SW_SHOWNA);
owns_capture_ = do_capture;
if (do_capture) {
SetCapture();
has_capture_ = true;
#ifdef DEBUG_MENU
DLOG(INFO) << "Doing capture";
#endif
}
}
virtual void Hide() {
if (closed_) {
// We're already closed, nothing to do.
// This is invoked twice if the first time just hid us, and the second
// time deleted Closed (deleted) us.
return;
}
// The menus are freed separately, and possibly before the window is closed,
// remove them so that View doesn't try to access deleted objects.
static_cast<MenuHostRootView*>(GetRootView())->SuspendEvents();
GetRootView()->RemoveAllChildViews(false);
closed_ = true;
ReleaseCapture();
HWNDViewContainer::Hide();
}
virtual void OnCaptureChanged(HWND hwnd) {
HWNDViewContainer::OnCaptureChanged(hwnd);
owns_capture_ = false;
#ifdef DEBUG_MENU
DLOG(INFO) << "Capture changed";
#endif
}
void ReleaseCapture() {
if (owns_capture_) {
#ifdef DEBUG_MENU
DLOG(INFO) << "released capture";
#endif
owns_capture_ = false;
::ReleaseCapture();
}
}
protected:
// Overriden to create MenuHostRootView.
virtual RootView* CreateRootView() {
return new MenuHostRootView(this, submenu_);
}
virtual void OnCancelMode() {
if (!closed_) {
#ifdef DEBUG_MENU
DLOG(INFO) << "OnCanceMode, closing menu";
#endif
submenu_->GetMenuItem()->GetMenuController()->Cancel(true);
}
}
// Overriden to return false, we do NOT want to release capture on mouse
// release.
virtual bool ReleaseCaptureOnMouseReleased() {
return false;
}
private:
// If true, we've been closed.
bool closed_;
// If true, we own the capture and need to release it.
bool owns_capture_;
// The view we contain.
SubmenuView* submenu_;
DISALLOW_EVIL_CONSTRUCTORS(MenuHost);
};
// EmptyMenuMenuItem ---------------------------------------------------------
// EmptyMenuMenuItem is used when a menu has no menu items. EmptyMenuMenuItem
// is itself a MenuItemView, but it uses a different ID so that it isn't
// identified as a MenuItemView.
class EmptyMenuMenuItem : public MenuItemView {
public:
// ID used for EmptyMenuMenuItem.
static const int kEmptyMenuItemViewID;
EmptyMenuMenuItem(MenuItemView* parent) : MenuItemView(parent, 0, NORMAL) {
SetTitle(l10n_util::GetString(IDS_MENU_EMPTY_SUBMENU));
// Set this so that we're not identified as a normal menu item.
SetID(kEmptyMenuItemViewID);
SetEnabled(false);
}
private:
DISALLOW_EVIL_CONSTRUCTORS(EmptyMenuMenuItem);
};
// static
const int EmptyMenuMenuItem::kEmptyMenuItemViewID =
MenuItemView::kMenuItemViewID + 1;
} // namespace
// SubmenuView ---------------------------------------------------------------
SubmenuView::SubmenuView(MenuItemView* parent)
: parent_menu_item_(parent),
host_(NULL),
drop_item_(NULL),
scroll_view_container_(NULL) {
DCHECK(parent);
// We'll delete ourselves, otherwise the ScrollView would delete us on close.
SetParentOwned(false);
}
SubmenuView::~SubmenuView() {
DCHECK(!host_);
delete scroll_view_container_;
}
int SubmenuView::GetMenuItemCount() {
int count = 0;
for (int i = 0; i < GetChildViewCount(); ++i) {
if (GetChildViewAt(i)->GetID() == MenuItemView::kMenuItemViewID)
count++;
}
return count;
}
MenuItemView* SubmenuView::GetMenuItemAt(int index) {
for (int i = 0, count = 0; i < GetChildViewCount(); ++i) {
if (GetChildViewAt(i)->GetID() == MenuItemView::kMenuItemViewID &&
count++ == index) {
return static_cast<MenuItemView*>(GetChildViewAt(i));
}
}
NOTREACHED();
return NULL;
}
void SubmenuView::Layout() {
// We're in a ScrollView, and need to set our width/height ourselves.
View* parent = GetParent();
if (!parent)
return;
CSize pref;
GetPreferredSize(&pref);
SetBounds(x(), y(), parent->width(), pref.cy);
gfx::Insets insets = GetInsets();
int x = insets.left();
int y = insets.top();
int menu_item_width = width() - insets.width();
for (int i = 0; i < GetChildViewCount(); ++i) {
View* child = GetChildViewAt(i);
CSize child_pref_size;
child->GetPreferredSize(&child_pref_size);
child->SetBounds(x, y, menu_item_width, child_pref_size.cy);
y += child_pref_size.cy;
}
}
void SubmenuView::GetPreferredSize(CSize* out) {
if (GetChildViewCount() == 0) {
out->SetSize(0, 0);
return;
}
int max_width = 0;
int height = 0;
for (int i = 0; i < GetChildViewCount(); ++i) {
View* child = GetChildViewAt(i);
CSize child_pref_size;
child->GetPreferredSize(&child_pref_size);
max_width = std::max(max_width, static_cast<int>(child_pref_size.cx));
height += child_pref_size.cy;
}
gfx::Insets insets = GetInsets();
out->SetSize(max_width + insets.width(), height + insets.height());
}
void SubmenuView::DidChangeBounds(const CRect& previous, const CRect& current) {
SchedulePaint();
}
void SubmenuView::PaintChildren(ChromeCanvas* canvas) {
View::PaintChildren(canvas);
if (drop_item_ && drop_position_ != MenuDelegate::DROP_ON)
PaintDropIndicator(canvas, drop_item_, drop_position_);
}
bool SubmenuView::CanDrop(const OSExchangeData& data) {
DCHECK(GetMenuItem()->GetMenuController());
return GetMenuItem()->GetMenuController()->CanDrop(this, data);
}
void SubmenuView::OnDragEntered(const DropTargetEvent& event) {
DCHECK(GetMenuItem()->GetMenuController());
GetMenuItem()->GetMenuController()->OnDragEntered(this, event);
}
int SubmenuView::OnDragUpdated(const DropTargetEvent& event) {
DCHECK(GetMenuItem()->GetMenuController());
return GetMenuItem()->GetMenuController()->OnDragUpdated(this, event);
}
void SubmenuView::OnDragExited() {
DCHECK(GetMenuItem()->GetMenuController());
GetMenuItem()->GetMenuController()->OnDragExited(this);
}
int SubmenuView::OnPerformDrop(const DropTargetEvent& event) {
DCHECK(GetMenuItem()->GetMenuController());
return GetMenuItem()->GetMenuController()->OnPerformDrop(this, event);
}
bool SubmenuView::OnMouseWheel(const MouseWheelEvent& e) {
gfx::Rect vis_bounds = GetVisibleBounds();
int menu_item_count = GetMenuItemCount();
if (vis_bounds.height() == height() || !menu_item_count) {
// All menu items are visible, nothing to scroll.
return true;
}
// Find the index of the first menu item whose y-coordinate is >= visible
// y-coordinate.
int first_vis_index = -1;
for (int i = 0; i < menu_item_count; ++i) {
MenuItemView* menu_item = GetMenuItemAt(i);
if (menu_item->y() == vis_bounds.y()) {
first_vis_index = i;
break;
} else if (menu_item->y() > vis_bounds.y()) {
first_vis_index = std::max(0, i - 1);
break;
}
}
if (first_vis_index == -1)
return true;
// If the first item isn't entirely visible, make it visible, otherwise make
// the next/previous one entirely visible.
int delta = abs(e.GetOffset() / WHEEL_DELTA);
bool scroll_up = (e.GetOffset() > 0);
while (delta-- > 0) {
int scroll_amount = 0;
if (scroll_up) {
if (GetMenuItemAt(first_vis_index)->y() == vis_bounds.y()) {
if (first_vis_index != 0) {
scroll_amount = GetMenuItemAt(first_vis_index - 1)->y() -
vis_bounds.y();
first_vis_index--;
} else {
break;
}
} else {
scroll_amount = GetMenuItemAt(first_vis_index)->y() - vis_bounds.y();
}
} else {
if (first_vis_index + 1 == GetMenuItemCount())
break;
scroll_amount = GetMenuItemAt(first_vis_index + 1)->y() -
vis_bounds.y();
if (GetMenuItemAt(first_vis_index)->y() == vis_bounds.y())
first_vis_index++;
}
ScrollRectToVisible(0, vis_bounds.y() + scroll_amount, vis_bounds.width(),
vis_bounds.height());
vis_bounds = GetVisibleBounds();
}
return true;
}
void SubmenuView::ShowAt(HWND parent,
const gfx::Rect& bounds,
bool do_capture) {
DCHECK(!host_);
host_ = new MenuHost(this);
// Force construction of the scroll view container.
GetScrollViewContainer();
// Make sure the first row is visible.
ScrollRectToVisible(0, 0, 1, 1);
host_->Init(parent, bounds, scroll_view_container_, do_capture);
}
void SubmenuView::Close(bool destroy_host) {
if (host_) {
if (destroy_host) {
host_->Close();
host_ = NULL;
} else {
host_->Hide();
}
}
}
void SubmenuView::ReleaseCapture() {
host_->ReleaseCapture();
}
void SubmenuView::SetDropMenuItem(MenuItemView* item,
MenuDelegate::DropPosition position) {
if (drop_item_ == item && drop_position_ == position)
return;
SchedulePaintForDropIndicator(drop_item_, drop_position_);
drop_item_ = item;
drop_position_ = position;
SchedulePaintForDropIndicator(drop_item_, drop_position_);
}
bool SubmenuView::GetShowSelection(MenuItemView* item) {
if (drop_item_ == NULL)
return true;
// Something is being dropped on one of this menus items. Show the
// selection if the drop is on the passed in item and the drop position is
// ON.
return (drop_item_ == item && drop_position_ == MenuDelegate::DROP_ON);
}
MenuScrollViewContainer* SubmenuView::GetScrollViewContainer() {
if (!scroll_view_container_) {
scroll_view_container_ = new MenuScrollViewContainer(this);
// Otherwise MenuHost would delete us.
scroll_view_container_->SetParentOwned(false);
}
return scroll_view_container_;
}
void SubmenuView::PaintDropIndicator(ChromeCanvas* canvas,
MenuItemView* item,
MenuDelegate::DropPosition position) {
if (position == MenuDelegate::DROP_NONE)
return;
gfx::Rect bounds = CalculateDropIndicatorBounds(item, position);
canvas->FillRectInt(kDropIndicatorColor, bounds.x(), bounds.y(),
bounds.width(), bounds.height());
}
void SubmenuView::SchedulePaintForDropIndicator(
MenuItemView* item,
MenuDelegate::DropPosition position) {
if (item == NULL)
return;
if (position == MenuDelegate::DROP_ON) {
item->SchedulePaint();
} else if (position != MenuDelegate::DROP_NONE) {
gfx::Rect bounds = CalculateDropIndicatorBounds(item, position);
SchedulePaint(bounds.x(), bounds.y(), bounds.width(), bounds.height());
}
}
gfx::Rect SubmenuView::CalculateDropIndicatorBounds(
MenuItemView* item,
MenuDelegate::DropPosition position) {
DCHECK(position != MenuDelegate::DROP_NONE);
CRect item_bounds_c;
item->GetBounds(&item_bounds_c);
gfx::Rect item_bounds(item_bounds_c);
switch (position) {
case MenuDelegate::DROP_BEFORE:
item_bounds.Offset(0, -kDropIndicatorHeight / 2);
item_bounds.set_height(kDropIndicatorHeight);
return item_bounds;
case MenuDelegate::DROP_AFTER:
item_bounds.Offset(0, item_bounds.height() - kDropIndicatorHeight / 2);
item_bounds.set_height(kDropIndicatorHeight);
return item_bounds;
default:
// Don't render anything for on.
return gfx::Rect();
}
}
// MenuItemView ---------------------------------------------------------------
// static
const int MenuItemView::kMenuItemViewID = 1001;
// static
const int MenuItemView::kDropBetweenPixels = 5;
// static
bool MenuItemView::allow_task_nesting_during_run_ = false;
MenuItemView::MenuItemView(MenuDelegate* delegate) {
DCHECK(delegate_);
Init(NULL, 0, SUBMENU, delegate);
}
MenuItemView::~MenuItemView() {
if (controller_) {
// We're currently showing.
// We can't delete ourselves while we're blocking.
DCHECK(!controller_->IsBlockingRun());
// Invoking Cancel is going to call us back and notify the delegate.
// Notifying the delegate from the destructor can be problematic. To avoid
// this the delegate is set to NULL.
delegate_ = NULL;
controller_->Cancel(true);
}
delete submenu_;
}
void MenuItemView::RunMenuAt(HWND parent,
const gfx::Rect& bounds,
AnchorPosition anchor,
bool show_mnemonics) {
PrepareForRun(show_mnemonics);
int mouse_event_flags;
MenuController* controller = MenuController::GetActiveInstance();
bool owns_controller = false;
if (!controller) {
// No menus are showing, show one.
controller = new MenuController(true);
MenuController::SetActiveInstance(controller);
owns_controller = true;
} else {
// A menu is already showing, use the same controller.
// Don't support blocking from within non-blocking.
DCHECK(controller->IsBlockingRun());
}
controller_ = controller;
// Run the loop.
MenuItemView* result =
controller->Run(parent, this, bounds, anchor, &mouse_event_flags);
RemoveEmptyMenus();
controller_ = NULL;
if (owns_controller) {
// We created the controller and need to delete it.
if (MenuController::GetActiveInstance() == controller)
MenuController::SetActiveInstance(NULL);
delete controller;
}
// Make sure all the windows we created to show the menus have been
// destroyed.
DestroyAllMenuHosts();
if (result && delegate_)
delegate_->ExecuteCommand(result->GetCommand(), mouse_event_flags);
}
void MenuItemView::RunMenuForDropAt(HWND parent,
const gfx::Rect& bounds,
AnchorPosition anchor) {
PrepareForRun(false);
// If there is a menu, hide it so that only one menu is shown during dnd.
MenuController* current_controller = MenuController::GetActiveInstance();
if (current_controller) {
current_controller->Cancel(true);
}
// Always create a new controller for non-blocking.
controller_ = new MenuController(false);
// Set the instance, that way it can be canceled by another menu.
MenuController::SetActiveInstance(controller_);
controller_->Run(parent, this, bounds, anchor, NULL);
}
void MenuItemView::Cancel() {
if (controller_ && !canceled_) {
canceled_ = true;
controller_->Cancel(true);
}
}
SubmenuView* MenuItemView::CreateSubmenu() {
if (!submenu_)
submenu_ = new SubmenuView(this);
return submenu_;
}
void MenuItemView::SetSelected(bool selected) {
selected_ = selected;
SchedulePaint();
}
void MenuItemView::SetIcon(const SkBitmap& icon, int item_id) {
MenuItemView* item = GetDescendantByID(item_id);
DCHECK(item);
item->SetIcon(icon);
}
void MenuItemView::SetIcon(const SkBitmap& icon) {
icon_ = icon;
SchedulePaint();
}
void MenuItemView::Paint(ChromeCanvas* canvas) {
Paint(canvas, false);
}
void MenuItemView::GetPreferredSize(CSize* out) {
out->cx = font_.GetStringWidth(title_) + label_start + item_right_margin;
out->cy = font_.height() + kItemBottomMargin + kItemTopMargin;
}
MenuController* MenuItemView::GetMenuController() {
return GetRootMenuItem()->controller_;
}
MenuDelegate* MenuItemView::GetDelegate() {
return GetRootMenuItem()->delegate_;
}
MenuItemView* MenuItemView::GetRootMenuItem() {
MenuItemView* item = this;
while (item) {
MenuItemView* parent = item->GetParentMenuItem();
if (!parent)
return item;
item = parent;
}
NOTREACHED();
return NULL;
}
wchar_t MenuItemView::GetMnemonic() {
const std::wstring& title = GetTitle();
size_t index = 0;
do {
index = title.find('&', index);
if (index != std::wstring::npos) {
if (index + 1 != title.size() && title[index + 1] != '&')
return title[index + 1];
index++;
}
} while (index != std::wstring::npos);
return 0;
}
MenuItemView::MenuItemView(MenuItemView* parent,
int command,
MenuItemView::Type type) {
Init(parent, command, type, NULL);
}
void MenuItemView::Init(MenuItemView* parent,
int command,
MenuItemView::Type type,
MenuDelegate* delegate) {
delegate_ = delegate;
controller_ = NULL;
canceled_ = false;
parent_menu_item_ = parent;
type_ = type;
selected_ = false;
command_ = command;
submenu_ = NULL;
// Assign our ID, this allows SubmenuItemView to find MenuItemViews.
SetID(kMenuItemViewID);
MenuDelegate* root_delegate = GetDelegate();
if (root_delegate)
SetEnabled(root_delegate->IsCommandEnabled(command));
}
MenuItemView* MenuItemView::AppendMenuItemInternal(int item_id,
const std::wstring& label,
const SkBitmap& icon,
Type type) {
if (!submenu_)
CreateSubmenu();
if (type == SEPARATOR) {
submenu_->AddChildView(new MenuSeparator());
return NULL;
}
MenuItemView* item = new MenuItemView(this, item_id, type);
if (label.empty() && GetDelegate())
item->SetTitle(GetDelegate()->GetLabel(item_id));
else
item->SetTitle(label);
item->SetIcon(icon);
if (type == SUBMENU)
item->CreateSubmenu();
submenu_->AddChildView(item);
return item;
}
MenuItemView* MenuItemView::GetDescendantByID(int id) {
if (GetCommand() == id)
return this;
if (!HasSubmenu())
return NULL;
for (int i = 0; i < GetSubmenu()->GetChildViewCount(); ++i) {
View* child = GetSubmenu()->GetChildViewAt(i);
if (child->GetID() == MenuItemView::kMenuItemViewID) {
MenuItemView* result = static_cast<MenuItemView*>(child)->
GetDescendantByID(id);
if (result)
return result;
}
}
return NULL;
}
void MenuItemView::DropMenuClosed(bool notify_delegate) {
DCHECK(controller_);
DCHECK(!controller_->IsBlockingRun());
if (MenuController::GetActiveInstance() == controller_)
MenuController::SetActiveInstance(NULL);
delete controller_;
controller_ = NULL;
RemoveEmptyMenus();
if (notify_delegate && delegate_) {
// Our delegate is null when invoked from the destructor.
delegate_->DropMenuClosed(this);
}
// WARNING: its possible the delegate deleted us at this point.
}
void MenuItemView::PrepareForRun(bool show_mnemonics) {
// Currently we only support showing the root.
DCHECK(!parent_menu_item_);
// Don't invoke run from within run on the same menu.
DCHECK(!controller_);
// Force us to have a submenu.
CreateSubmenu();
canceled_ = false;
show_mnemonics_ = show_mnemonics;
AddEmptyMenus();
UpdateMenuPartSizes();
}
int MenuItemView::GetDrawStringFlags() {
int flags = 0;
if (UILayoutIsRightToLeft())
flags |= ChromeCanvas::TEXT_ALIGN_RIGHT;
else
flags |= ChromeCanvas::TEXT_ALIGN_LEFT;
return flags |
(show_mnemonics_ ? ChromeCanvas::SHOW_PREFIX : ChromeCanvas::HIDE_PREFIX);
}
void MenuItemView::AddEmptyMenus() {
DCHECK(HasSubmenu());
if (submenu_->GetChildViewCount() == 0) {
submenu_->AddChildView(0, new EmptyMenuMenuItem(this));
} else {
for (int i = 0, item_count = submenu_->GetMenuItemCount(); i < item_count;
++i) {
MenuItemView* child = submenu_->GetMenuItemAt(i);
if (child->HasSubmenu())
child->AddEmptyMenus();
}
}
}
void MenuItemView::RemoveEmptyMenus() {
DCHECK(HasSubmenu());
// Iterate backwards as we may end up removing views, which alters the child
// view count.
for (int i = submenu_->GetChildViewCount() - 1; i >= 0; --i) {
View* child = submenu_->GetChildViewAt(i);
if (child->GetID() == MenuItemView::kMenuItemViewID) {
MenuItemView* menu_item = static_cast<MenuItemView*>(child);
if (menu_item->HasSubmenu())
menu_item->RemoveEmptyMenus();
} else if (child->GetID() == EmptyMenuMenuItem::kEmptyMenuItemViewID) {
submenu_->RemoveChildView(child);
}
}
}
void MenuItemView::AdjustBoundsForRTLUI(RECT* rect) const {
gfx::Rect mirrored_rect(*rect);
mirrored_rect.set_x(MirroredLeftPointForRect(mirrored_rect));
*rect = mirrored_rect.ToRECT();
}
void MenuItemView::Paint(ChromeCanvas* canvas, bool for_drag) {
bool render_selection =
(!for_drag && IsSelected() &&
parent_menu_item_->GetSubmenu()->GetShowSelection(this));
int state = render_selection ? MPI_HOT :
(IsEnabled() ? MPI_NORMAL : MPI_DISABLED);
HDC dc = canvas->beginPlatformPaint();
// The gutter is rendered before the background.
if (render_gutter && !for_drag) {
RECT gutter_bounds = { label_start - kGutterToLabel - gutter_width, 0, 0,
height() };
gutter_bounds.right = gutter_bounds.left + gutter_width;
AdjustBoundsForRTLUI(&gutter_bounds);
NativeTheme::instance()->PaintMenuGutter(dc, MENU_POPUPGUTTER, MPI_NORMAL, &gutter_bounds);
}
// Render the background.
if (!for_drag) {
RECT item_bounds = { 0, 0, width(), height() };
AdjustBoundsForRTLUI(&item_bounds);
NativeTheme::instance()->PaintMenuItemBackground(
NativeTheme::MENU, dc, MENU_POPUPITEM, state, render_selection,
&item_bounds);
}
int icon_x = kItemLeftMargin;
int icon_y = kItemTopMargin + (height() - kItemTopMargin -
kItemBottomMargin - check_height) / 2;
int icon_height = check_height;
int icon_width = check_width;
if (type_ == CHECKBOX && GetDelegate()->IsItemChecked(GetCommand())) {
// Draw the check background.
RECT check_bg_bounds = { 0, 0, icon_x + icon_width, height() };
const int bg_state = IsEnabled() ? MCB_NORMAL : MCB_DISABLED;
AdjustBoundsForRTLUI(&check_bg_bounds);
NativeTheme::instance()->PaintMenuCheckBackground(
NativeTheme::MENU, dc, MENU_POPUPCHECKBACKGROUND, bg_state,
&check_bg_bounds);
// And the check.
RECT check_bounds = { icon_x, icon_y, icon_x + icon_width,
icon_y + icon_height };
const int check_state = IsEnabled() ? MC_CHECKMARKNORMAL :
MC_CHECKMARKDISABLED;
AdjustBoundsForRTLUI(&check_bounds);
NativeTheme::instance()->PaintMenuCheck(
NativeTheme::MENU, dc, MENU_POPUPCHECK, check_state, &check_bounds,
render_selection);
}
// Render the foreground.
// Menu color is specific to Vista, fallback to classic colors if can't
// get color.
int default_sys_color = render_selection ? COLOR_HIGHLIGHTTEXT :
(IsEnabled() ? COLOR_MENUTEXT : COLOR_GRAYTEXT);
SkColor fg_color = NativeTheme::instance()->GetThemeColorWithDefault(
NativeTheme::MENU, MENU_POPUPITEM, state, TMT_TEXTCOLOR, default_sys_color);
int width = this->width() - item_right_margin - label_start;
gfx::Rect text_bounds(label_start, kItemTopMargin, width, font_.height());
text_bounds.set_x(MirroredLeftPointForRect(text_bounds));
canvas->DrawStringInt(GetTitle(), font_, fg_color, text_bounds.x(),
text_bounds.y(), text_bounds.width(),
text_bounds.height(),
GetRootMenuItem()->GetDrawStringFlags());
if (icon_.width() > 0) {
gfx::Rect icon_bounds(kItemLeftMargin,
kItemTopMargin + (height() - kItemTopMargin -
kItemBottomMargin - icon_.height()) / 2,
icon_.width(),
icon_.height());
icon_bounds.set_x(MirroredLeftPointForRect(icon_bounds));
canvas->DrawBitmapInt(icon_, icon_bounds.x(), icon_bounds.y());
}
if (HasSubmenu()) {
int state_id = IsEnabled() ? MSM_NORMAL : MSM_DISABLED;
RECT arrow_bounds = { this->width() - item_right_margin + kLabelToArrowPadding,
0, 0, height() };
arrow_bounds.right = arrow_bounds.left + arrow_width;
AdjustBoundsForRTLUI(&arrow_bounds);
// If our sub menus open from right to left (which is the case when the
// locale is RTL) then we should make sure the menu arrow points to the
// right direction.
NativeTheme::MenuArrowDirection arrow_direction;
if (UILayoutIsRightToLeft())
arrow_direction = NativeTheme::LEFT_POINTING_ARROW;
else
arrow_direction = NativeTheme::RIGHT_POINTING_ARROW;
NativeTheme::instance()->PaintMenuArrow(
NativeTheme::MENU, dc, MENU_POPUPSUBMENU, state_id, &arrow_bounds,
arrow_direction, render_selection);
}
canvas->endPlatformPaint();
}
void MenuItemView::DestroyAllMenuHosts() {
if (!HasSubmenu())
return;
submenu_->Close(true);
for (int i = 0, item_count = submenu_->GetMenuItemCount(); i < item_count;
++i) {
submenu_->GetMenuItemAt(i)->DestroyAllMenuHosts();
}
}
// MenuController ------------------------------------------------------------
// static
MenuController* MenuController::active_instance_ = NULL;
// static
MenuController* MenuController::GetActiveInstance() {
return active_instance_;
}
#ifdef DEBUG_MENU
static int instance_count = 0;
static int nested_depth = 0;
#endif
MenuItemView* MenuController::Run(HWND parent,
MenuItemView* root,
const gfx::Rect& bounds,
MenuItemView::AnchorPosition position,
int* result_mouse_event_flags) {
exit_all_ = false;
possible_drag_ = false;
bool nested_menu = showing_;
if (showing_) {
// Only support nesting of blocking_run menus, nesting of
// blocking/non-blocking shouldn't be needed.
DCHECK(blocking_run_);
// We're already showing, push the current state.
menu_stack_.push_back(state_);
// The context menu should be owned by the same parent.
DCHECK(owner_ == parent);
} else {
showing_ = true;
}
// Reset current state.
pending_state_ = State();
state_ = State();
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);
}
pending_state_.anchor = position;
owner_ = parent;
// Calculate the bounds of the monitor we'll show menus on. Do this once to
// avoid repeated system queries for the info.
POINT initial_loc = { bounds.x(), bounds.y() };
HMONITOR monitor = MonitorFromPoint(initial_loc, MONITOR_DEFAULTTONEAREST);
if (monitor) {
MONITORINFO mi = {0};
mi.cbSize = sizeof(mi);
GetMonitorInfo(monitor, &mi);
// Menus appear over the taskbar.
pending_state_.monitor_bounds = gfx::Rect(mi.rcMonitor);
}
did_capture_ = false;
any_menu_contains_mouse_ = false;
// Set the selection, which opens the initial menu.
SetSelection(root, true, true);
if (!blocking_run_) {
// Start the timer to hide the menu. This is needed as we get no
// notification when the drag has finished.
StartCancelAllTimer();
return NULL;
}
#ifdef DEBUG_MENU
nested_depth++;
DLOG(INFO) << " entering nested loop, depth=" << nested_depth;
#endif
MessageLoopForUI* loop = MessageLoopForUI::current();
if (MenuItemView::allow_task_nesting_during_run_) {
bool did_allow_task_nesting = loop->NestableTasksAllowed();
loop->SetNestableTasksAllowed(true);
loop->Run(this);
loop->SetNestableTasksAllowed(did_allow_task_nesting);
} else {
loop->Run(this);
}
#ifdef DEBUG_MENU
nested_depth--;
DLOG(INFO) << " exiting nested loop, depth=" << nested_depth;
#endif
// Close any open menus.
SetSelection(NULL, false, true);
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();
pending_state_ = menu_stack_.back();
menu_stack_.pop_back();
} else {
showing_ = false;
}
MenuItemView* result = result_;
// In case we're nested, reset result_.
result_ = NULL;
if (result_mouse_event_flags)
*result_mouse_event_flags = result_mouse_event_flags_;
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();
// Set exit_all_ to true, which makes sure all nested loops exit
// immediately.
exit_all_ = true;
}
return result;
}
void MenuController::SetSelection(MenuItemView* menu_item,
bool open_submenu,
bool update_immediately) {
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();
// Notify the old path it isn't selected.
for (size_t i = paths_differ_at; i < current_size; ++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]->SetSelected(true);
if (menu_item && menu_item->GetDelegate())
menu_item->GetDelegate()->SelectionChanged(menu_item);
pending_state_.item = menu_item;
pending_state_.submenu_open = open_submenu;
// Stop timers.
StopShowTimer();
StopCancelAllTimer();
if (update_immediately)
CommitPendingSelection();
else
StartShowTimer();
}
void MenuController::Cancel(bool all) {
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;
exit_all_ = all;
// Hide windows immediately.
SetSelection(NULL, false, true);
if (!blocking_run_) {
// If we didn't block the caller we need to notify the menu, which
// triggers deleting us.
DCHECK(selected);
showing_ = false;
selected->GetRootMenuItem()->DropMenuClosed(true);
// WARNING: the call to MenuClosed deletes us.
return;
}
}
void MenuController::OnMousePressed(SubmenuView* source,
const MouseEvent& event) {
#ifdef DEBUG_MENU
DLOG(INFO) << "OnMousePressed source=" << source;
#endif
if (!blocking_run_)
return;
MenuPart part =
GetMenuPartByScreenCoordinate(source, event.x(), event.y());
if (part.is_scroll())
return; // Ignore presses on scroll buttons.
if (part.type == MenuPart::NONE ||
(part.type == MenuPart::MENU_ITEM && part.menu &&
part.menu->GetRootMenuItem() != state_.item->GetRootMenuItem())) {
// Mouse wasn't pressed over any menu, or the active menu, cancel.
// We're going to close and we own the mouse capture. We need to repost the
// mouse down, otherwise the window the user clicked on won't get the
// event.
RepostEvent(source, event);
// And close.
Cancel(true);
return;
}
any_menu_contains_mouse_ = true;
bool open_submenu = false;
if (!part.menu) {
part.menu = source->GetMenuItem();
open_submenu = true;
} else {
if (part.menu->GetDelegate()->CanDrag(part.menu)) {
possible_drag_ = true;
press_x_ = event.x();
press_y_ = event.y();
}
if (part.menu->HasSubmenu())
open_submenu = true;
}
// On a press we immediately commit the selection, that way a submenu
// pops up immediately rather than after a delay.
SetSelection(part.menu, open_submenu, true);
}
void MenuController::OnMouseDragged(SubmenuView* source,
const MouseEvent& event) {
#ifdef DEBUG_MENU
DLOG(INFO) << "OnMouseDragged source=" << source;
#endif
MenuPart part =
GetMenuPartByScreenCoordinate(source, event.x(), event.y());
UpdateScrolling(part);
if (!blocking_run_)
return;
if (possible_drag_) {
if (ChromeViews::View::ExceededDragThreshold(event.x() - press_x_,
event.y() - press_y_)) {
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.
CPoint press_loc(press_x_, press_y_);
View::ConvertPointToScreen(source->GetScrollViewContainer(), &press_loc);
View::ConvertPointToView(NULL, item, &press_loc);
CPoint drag_loc(event.x(), event.y());
View::ConvertPointToScreen(source->GetScrollViewContainer(), &drag_loc);
View::ConvertPointToView(NULL, item, &drag_loc);
in_drag_ = true;
ChromeCanvas canvas(item->width(), item->height(), false);
item->Paint(&canvas, true);
scoped_refptr<OSExchangeData> data(new OSExchangeData);
item->GetDelegate()->WriteDragData(item, data.get());
drag_utils::SetDragImageOnDataObject(canvas, item->width(),
item->height(), press_loc.x,
press_loc.y, data);
scoped_refptr<BaseDragSource> drag_source(new BaseDragSource);
int drag_ops = item->GetDelegate()->GetDragOperations(item);
DWORD effects;
StopScrolling();
DoDragDrop(data, drag_source,
DragDropTypes::DragOperationToDropEffect(drag_ops),
&effects);
if (GetActiveInstance() == this) {
if (showing_ ) {
// We're still showing, close all menus.
CloseAllNestedMenus();
Cancel(true);
} // else case, drop was on us.
} // else case, someone canceled us, don't do anything
}
return;
}
if (part.type == MenuPart::MENU_ITEM) {
if (!part.menu)
part.menu = source->GetMenuItem();
SetSelection(part.menu ? part.menu : state_.item, true, false);
}
any_menu_contains_mouse_ = (part.type == MenuPart::MENU_ITEM);
}
void MenuController::OnMouseReleased(SubmenuView* source,
const MouseEvent& event) {
#ifdef DEBUG_MENU
DLOG(INFO) << "OnMouseReleased source=" << source;
#endif
if (!blocking_run_)
return;
DCHECK(state_.item);
possible_drag_ = false;
DCHECK(blocking_run_);
MenuPart part =
GetMenuPartByScreenCoordinate(source, event.x(), event.y());
any_menu_contains_mouse_ = (part.type == MenuPart::MENU_ITEM);
if (event.IsRightMouseButton() && (part.type == MenuPart::MENU_ITEM &&
part.menu)) {
// Set the selection immediately, making sure the submenu is only open
// if it already was.
bool open_submenu = (state_.item == pending_state_.item &&
state_.submenu_open);
SetSelection(pending_state_.item, open_submenu, true);
CPoint loc(event.x(), event.y());
View::ConvertPointToScreen(source->GetScrollViewContainer(), &loc);
// If we open a context menu just return now
if (part.menu->GetDelegate()->ShowContextMenu(
part.menu, part.menu->GetCommand(), loc.x, loc.y, true))
return;
}
if (!part.is_scroll() && part.menu && !part.menu->HasSubmenu()) {
if (part.menu->GetDelegate()->IsTriggerableEvent(event)) {
Accept(part.menu, event.GetFlags());
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, true, true);
}
}
void MenuController::OnMouseMoved(SubmenuView* source,
const MouseEvent& event) {
#ifdef DEBUG_MENU
DLOG(INFO) << "OnMouseMoved source=" << source;
#endif
if (showing_submenu_)
return;
MenuPart part =
GetMenuPartByScreenCoordinate(source, event.x(), event.y());
UpdateScrolling(part);
if (!blocking_run_)
return;
any_menu_contains_mouse_ = (part.type == MenuPart::MENU_ITEM);
if (part.type == MenuPart::MENU_ITEM && part.menu) {
SetSelection(part.menu, true, false);
} else if (!part.is_scroll() && any_menu_contains_mouse_ &&
pending_state_.item &&
(!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(), true, false);
any_menu_contains_mouse_ = false;
}
}
void MenuController::OnMouseEntered(SubmenuView* source,
const MouseEvent& event) {
// MouseEntered is always followed by a mouse moved, so don't need to
// do anything here.
}
bool MenuController::CanDrop(SubmenuView* source, const OSExchangeData& data) {
return source->GetMenuItem()->GetDelegate()->CanDrop(source->GetMenuItem(),
data);
}
void MenuController::OnDragEntered(SubmenuView* source,
const DropTargetEvent& event) {
valid_drop_coordinates_ = false;
}
int MenuController::OnDragUpdated(SubmenuView* source,
const DropTargetEvent& event) {
StopCancelAllTimer();
CPoint screen_loc(event.x(), event.y());
View::ConvertPointToScreen(source, &screen_loc);
if (valid_drop_coordinates_ && screen_loc.x == drop_x_ &&
screen_loc.y == drop_y_) {
return last_drop_operation_;
}
drop_x_ = screen_loc.x;
drop_y_ = screen_loc.y;
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 = DragDropTypes::DRAG_NONE;
if (menu_item) {
CPoint menu_item_loc(event.x(), event.y());
View::ConvertPointToView(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 > MenuItemView::kDropBetweenPixels &&
menu_item_loc.y < (menu_item_height -
MenuItemView::kDropBetweenPixels))) {
drop_position = MenuDelegate::DROP_ON;
} else if (menu_item_loc.y < menu_item_height / 2) {
drop_position = MenuDelegate::DROP_BEFORE;
} else {
drop_position = 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 (menu_item->HasSubmenu()) {
// The menu has a submenu, schedule the submenu to open.
SetSelection(menu_item, true, false);
} else {
SetSelection(menu_item, false, false);
}
if (drop_position == MenuDelegate::DROP_NONE ||
drop_operation == DragDropTypes::DRAG_NONE) {
menu_item = NULL;
}
} else {
SetSelection(source->GetMenuItem(), true, false);
}
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 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, false, true);
CloseAllNestedMenus();
// Set state such that we exit.
showing_ = false;
exit_all_ = true;
if (!IsBlockingRun())
item->GetRootMenuItem()->DropMenuClosed(false);
// WARNING: the call to MenuClosed deletes us.
// If over an empty menu item, drop occurs on the parent.
if (drop_target->GetID() == EmptyMenuMenuItem::kEmptyMenuItemViewID)
drop_target = drop_target->GetParentMenuItem();
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();
}
// static
void MenuController::SetActiveInstance(MenuController* controller) {
active_instance_ = controller;
}
bool MenuController::Dispatch(const MSG& msg) {
DCHECK(blocking_run_);
if (exit_all_)
return false;
// NOTE: we don't get WM_ACTIVATE or anything else interesting in here.
switch (msg.message) {
// NOTE: focus wasn't changed when the menu was shown. As such, don't
// dispatch key events otherwise the focused window will get the events.
case WM_KEYDOWN:
return OnKeyDown(msg);
case WM_CHAR:
return OnChar(msg);
case WM_KEYUP:
return true;
case WM_CANCELMODE:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
// Exit immediately on system keys.
Cancel(true);
return false;
default:
break;
}
TranslateMessage(&msg);
DispatchMessage(&msg);
return !exit_all_;
}
bool MenuController::OnKeyDown(const MSG& msg) {
DCHECK(blocking_run_);
switch (msg.wParam) {
case VK_UP:
IncrementSelection(-1);
break;
case VK_DOWN:
IncrementSelection(1);
break;
// Handling of VK_RIGHT and VK_LEFT is different depending on the UI
// layout.
case VK_RIGHT:
if (l10n_util::TextDirection() == l10n_util::RIGHT_TO_LEFT)
CloseSubmenu();
else
OpenSubmenuChangeSelectionIfCan();
break;
case VK_LEFT:
if (l10n_util::TextDirection() == l10n_util::RIGHT_TO_LEFT)
OpenSubmenuChangeSelectionIfCan();
else
CloseSubmenu();
break;
case VK_RETURN:
if (pending_state_.item) {
if (pending_state_.item->HasSubmenu()) {
OpenSubmenuChangeSelectionIfCan();
} else if (pending_state_.item->IsEnabled()) {
Accept(pending_state_.item, 0);
return false;
}
}
break;
case VK_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(false);
return false;
} else {
CloseSubmenu();
}
break;
default:
TranslateMessage(&msg);
break;
}
return true;
}
bool MenuController::OnChar(const MSG& msg) {
DCHECK(blocking_run_);
return !SelectByChar(static_cast<wchar_t>(msg.wParam));
}
MenuController::MenuController(bool blocking)
: blocking_run_(blocking),
showing_(false),
exit_all_(false),
did_capture_(false),
result_(NULL),
drop_target_(NULL),
owner_(NULL),
possible_drag_(false),
valid_drop_coordinates_(false),
in_drag_(false),
any_menu_contains_mouse_(false),
showing_submenu_(false),
result_mouse_event_flags_(0) {
#ifdef DEBUG_MENU
instance_count++;
DLOG(INFO) << "created MC, count=" << instance_count;
#endif
}
MenuController::~MenuController() {
DCHECK(!showing_);
StopShowTimer();
StopCancelAllTimer();
#ifdef DEBUG_MENU
instance_count--;
DLOG(INFO) << "destroyed MC, count=" << instance_count;
#endif
}
void MenuController::Accept(MenuItemView* item, int mouse_event_flags) {
DCHECK(IsBlockingRun());
result_ = item;
exit_all_ = true;
result_mouse_event_flags_ = mouse_event_flags;
}
void MenuController::CloseAllNestedMenus() {
for (std::list<State>::iterator i = menu_stack_.begin();
i != menu_stack_.end(); ++i) {
MenuItemView* item = i->item;
MenuItemView* last_item = item;
while (item) {
CloseMenu(item);
last_item = item;
item = item->GetParentMenuItem();
}
i->submenu_open = false;
i->item = last_item;
}
}
MenuItemView* MenuController::GetMenuItemAt(View* source, int x, int y) {
View* child_under_mouse = source->GetViewForPoint(CPoint(x, y));
if (child_under_mouse && child_under_mouse->IsEnabled() &&
child_under_mouse->GetID() == 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->GetViewForPoint(CPoint(x, y));
if (child_under_mouse &&
child_under_mouse->GetID() == EmptyMenuMenuItem::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->GetViewForPoint(CPoint(x, y));
if (child_under_mouse && child_under_mouse->IsEnabled()) {
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::GetMenuPartByScreenCoordinate(
SubmenuView* source,
int source_x,
int source_y) {
MenuPart part;
CPoint screen_loc(source_x, source_y);
View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
MenuItemView* item = state_.item;
while (item) {
if (item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
GetMenuPartByScreenCoordinateImpl(item->GetSubmenu(), screen_loc,
&part)) {
return part;
}
item = item->GetParentMenuItem();
}
return part;
}
bool MenuController::GetMenuPartByScreenCoordinateImpl(
SubmenuView* menu,
const CPoint& screen_loc,
MenuPart* part) {
// Is the mouse over the scroll buttons?
CPoint scroll_view_loc = screen_loc;
View* scroll_view_container = menu->GetScrollViewContainer();
View::ConvertPointToView(NULL, 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)) {
CPoint menu_loc = screen_loc;
View::ConvertPointToView(NULL, menu, &menu_loc);
part->menu = GetMenuItemAt(menu, menu_loc.x, menu_loc.y);
part->type = MenuPart::MENU_ITEM;
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;
}
bool MenuController::DoesSubmenuContainLocation(SubmenuView* submenu,
const CPoint& screen_loc) {
CPoint view_loc = screen_loc;
View::ConvertPointToView(NULL, 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()) {
// See description of in_drag_ as to why close is conditionalized like
// this.
current_path[i]->GetSubmenu()->Close(!in_drag_);
}
}
// 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(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()) {
// The submenu is showing, but it shouldn't be, close it.
// See description of in_drag_ as to why close is conditionalized like
// this.
state_.item->GetSubmenu()->Close(!in_drag_);
}
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;
MenuItemView* item = state_.item;
while (item && !found) {
found = (item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
item->GetSubmenu() == scroll_task_->submenu());
item = item->GetParentMenuItem();
}
if (!found)
StopScrolling();
}
}
void MenuController::CloseMenu(MenuItemView* item) {
DCHECK(item);
if (!item->HasSubmenu())
return;
// See description of in_drag_ as to why close is conditionalized like this.
item->GetSubmenu()->Close(!in_drag_);
}
void MenuController::OpenMenu(MenuItemView* item) {
DCHECK(item);
if (item->GetSubmenu()->IsShowing()) {
return;
}
bool prefer_leading =
state_.open_leading.empty() ? true : state_.open_leading.back();
bool resulting_direction;
gfx::Rect bounds =
CalculateMenuBounds(item, prefer_leading, &resulting_direction);
state_.open_leading.push_back(resulting_direction);
bool do_capture = (!did_capture_ && blocking_run_);
showing_submenu_ = true;
item->GetSubmenu()->ShowAt(owner_, bounds, do_capture);
showing_submenu_ = false;
did_capture_ = true;
}
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(TimeDelta::FromMilliseconds(kShowDelay), this,
&MenuController::CommitPendingSelection);
}
void MenuController::StopShowTimer() {
show_timer_.Stop();
}
void MenuController::StartCancelAllTimer() {
cancel_all_timer_.Start(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);
CSize pref;
submenu->GetScrollViewContainer()->GetPreferredSize(&pref);
// Don't let the menu go to wide. This is some where between what IE and FF
// do.
pref.cx = std::min(pref.cx, kMaxMenuWidth);
if (!state_.monitor_bounds.IsEmpty())
pref.cx = std::min(pref.cx,
static_cast<LONG>(state_.monitor_bounds.width()));
// Assume we can honor prefer_leading.
*is_leading = prefer_leading;
int x, y;
if (!item->GetParentMenuItem()) {
// First item, position relative to initial location.
x = state_.initial_bounds.x();
y = state_.initial_bounds.bottom();
if (state_.anchor == MenuItemView::TOPRIGHT)
x = x + state_.initial_bounds.width() - pref.cx;
if (!state_.monitor_bounds.IsEmpty() &&
y + pref.cy > state_.monitor_bounds.bottom()) {
// The menu doesn't fit on screen. If the first location is above the
// half way point, show from the mouse location to bottom of screen.
// Otherwise show from the top of the screen to the location of the mouse.
// While odd, this behavior matches IE.
if (y < (state_.monitor_bounds.y() +
state_.monitor_bounds.height() / 2)) {
pref.cy = std::min(pref.cy,
static_cast<LONG>(state_.monitor_bounds.bottom() - y));
} else {
pref.cy = std::min(pref.cy, static_cast<LONG>(
state_.initial_bounds.y() - state_.monitor_bounds.y()));
y = state_.initial_bounds.y() - pref.cy;
}
}
} else {
// Not the first menu; position it relative to the bounds of the menu
// item.
CPoint item_loc(0, 0);
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 = item->UILayoutIsRightToLeft();
bool create_on_the_right = (prefer_leading && !layout_is_rtl) ||
(!prefer_leading && layout_is_rtl);
if (create_on_the_right) {
x = item_loc.x + item->width() - kSubmenuHorizontalInset;
if (state_.monitor_bounds.width() != 0 &&
x + pref.cx > state_.monitor_bounds.right()) {
if (layout_is_rtl)
*is_leading = true;
else
*is_leading = false;
x = item_loc.x - pref.cx + kSubmenuHorizontalInset;
}
} else {
x = item_loc.x - pref.cx + kSubmenuHorizontalInset;
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() - kSubmenuHorizontalInset;
}
}
y = item_loc.y - kSubmenuBorderSize;
if (state_.monitor_bounds.width() != 0) {
pref.cy = std::min(pref.cy,
static_cast<LONG>(state_.monitor_bounds.height()));
if (y + pref.cy > state_.monitor_bounds.bottom())
y = state_.monitor_bounds.bottom() - pref.cy;
if (y < state_.monitor_bounds.y())
y = state_.monitor_bounds.y();
}
}
if (state_.monitor_bounds.width() != 0) {
if (x + pref.cx > state_.monitor_bounds.right())
x = state_.monitor_bounds.right() - pref.cx;
if (x < state_.monitor_bounds.x())
x = state_.monitor_bounds.x();
}
return gfx::Rect(x, y, pref.cx, pref.cy);
}
// static
int MenuController::MenuDepth(MenuItemView* item) {
if (!item)
return 0;
return MenuDepth(item->GetParentMenuItem()) + 1;
}
void MenuController::IncrementSelection(int delta) {
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.
if (item->GetSubmenu()->GetMenuItemCount()) {
SetSelection(item->GetSubmenu()->GetMenuItemAt(0), false, false);
ScrollToVisible(item->GetSubmenu()->GetMenuItemAt(0));
return; // return so else case can fall through.
}
}
if (item->GetParentMenuItem()) {
MenuItemView* parent = item->GetParentMenuItem();
int parent_count = parent->GetSubmenu()->GetMenuItemCount();
if (parent_count > 1) {
for (int i = 0; i < parent_count; ++i) {
if (parent->GetSubmenu()->GetMenuItemAt(i) == item) {
int next_index = (i + delta + parent_count) % parent_count;
ScrollToVisible(parent->GetSubmenu()->GetMenuItemAt(next_index));
SetSelection(parent->GetSubmenu()->GetMenuItemAt(next_index), false,
false);
break;
}
}
}
}
}
void MenuController::OpenSubmenuChangeSelectionIfCan() {
MenuItemView* item = pending_state_.item;
if (item->HasSubmenu()) {
if (item->GetSubmenu()->GetMenuItemCount() > 0) {
SetSelection(item->GetSubmenu()->GetMenuItemAt(0), false, true);
} else {
// No menu items, just show the sub-menu.
SetSelection(item, true, true);
}
}
}
void MenuController::CloseSubmenu() {
MenuItemView* item = state_.item;
DCHECK(item);
if (!item->GetParentMenuItem())
return;
if (item->HasSubmenu() && item->GetSubmenu()->IsShowing()) {
SetSelection(item, false, true);
} else if (item->GetParentMenuItem()->GetParentMenuItem()) {
SetSelection(item->GetParentMenuItem(), false, true);
}
}
bool MenuController::IsMenuWindow(MenuItemView* item, HWND window) {
if (!item)
return false;
return ((item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
item->GetSubmenu()->GetViewContainer()->GetHWND() == window) ||
IsMenuWindow(item->GetParentMenuItem(), window));
}
bool MenuController::SelectByChar(wchar_t character) {
wchar_t char_array[1] = { character };
wchar_t key = l10n_util::ToLower(char_array)[0];
MenuItemView* item = pending_state_.item;
if (!item->HasSubmenu() || !item->GetSubmenu()->IsShowing())
item = item->GetParentMenuItem();
DCHECK(item);
DCHECK(item->HasSubmenu());
SubmenuView* submenu = item->GetSubmenu();
DCHECK(submenu);
int menu_item_count = submenu->GetMenuItemCount();
if (!menu_item_count)
return false;
for (int i = 0; i < menu_item_count; ++i) {
MenuItemView* child = submenu->GetMenuItemAt(i);
if (child->GetMnemonic() == key && child->IsEnabled()) {
Accept(child, 0);
return true;
}
}
// No matching mnemonic, search through items that don't have mnemonic
// based on first character of the title.
int first_match = -1;
bool has_multiple = false;
int next_match = -1;
int index_of_item = -1;
for (int i = 0; i < menu_item_count; ++i) {
MenuItemView* child = submenu->GetMenuItemAt(i);
if (!child->GetMnemonic() && child->IsEnabled()) {
std::wstring lower_title = l10n_util::ToLower(child->GetTitle());
if (child == pending_state_.item)
index_of_item = i;
if (lower_title.length() && lower_title[0] == key) {
if (first_match == -1)
first_match = i;
else
has_multiple = true;
if (next_match == -1 && index_of_item != -1 && i > index_of_item)
next_match = i;
}
}
}
if (first_match != -1) {
if (!has_multiple) {
if (submenu->GetMenuItemAt(first_match)->HasSubmenu()) {
SetSelection(submenu->GetMenuItemAt(first_match), true, false);
} else {
Accept(submenu->GetMenuItemAt(first_match), 0);
return true;
}
} else if (index_of_item == -1 || next_match == -1) {
SetSelection(submenu->GetMenuItemAt(first_match), false, false);
} else {
SetSelection(submenu->GetMenuItemAt(next_match), false, false);
}
}
return false;
}
void MenuController::RepostEvent(SubmenuView* source,
const MouseEvent& event) {
CPoint screen_loc(event.x(), event.y());
View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
HWND window = WindowFromPoint(screen_loc);
if (window) {
#ifdef DEBUG_MENU
DLOG(INFO) << "RepostEvent on press";
#endif
// Release the capture.
SubmenuView* submenu = state_.item->GetRootMenuItem()->GetSubmenu();
submenu->ReleaseCapture();
if (submenu->host() && submenu->host()->GetHWND() &&
GetWindowThreadProcessId(submenu->host()->GetHWND(), NULL) !=
GetWindowThreadProcessId(window, NULL)) {
// Even though we have mouse capture, windows generates a mouse event
// if the other window is in a separate thread. Don't generate an event in
// this case else the target window can get double events leading to bad
// behavior.
return;
}
// Convert the coordinates to the target window.
RECT window_bounds;
GetWindowRect(window, &window_bounds);
int window_x = screen_loc.x - window_bounds.left;
int window_y = screen_loc.y - window_bounds.top;
// Determine whether the click was in the client area or not.
// NOTE: WM_NCHITTEST coordinates are relative to the screen.
LRESULT nc_hit_result = SendMessage(window, WM_NCHITTEST, 0,
MAKELPARAM(screen_loc.x, screen_loc.y));
const bool in_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;
if (event.IsLeftMouseButton())
event_type = in_client_area ? WM_LBUTTONDOWN : WM_NCLBUTTONDOWN;
else if (event.IsMiddleMouseButton())
event_type = in_client_area ? WM_MBUTTONDOWN : WM_NCMBUTTONDOWN;
else if (event.IsRightMouseButton())
event_type = in_client_area ? WM_RBUTTONDOWN : WM_NCRBUTTONDOWN;
else
event_type = 0; // Unknown mouse press.
if (event_type) {
if (in_client_area) {
PostMessage(window, event_type, event.GetWindowsFlags(),
MAKELPARAM(window_x, window_y));
} else {
PostMessage(window, WM_NCLBUTTONDOWN, nc_hit_result,
MAKELPARAM(window_x, window_y));
}
}
}
}
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);
}
} // namespace ChromeViews