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cef/libcef/browser/native/native_menu_win.cc

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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "libcef/browser/native/native_menu_win.h"
#include "libcef/browser/native/menu_2.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/win/wrapped_window_proc.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/l10n/l10n_util_win.h"
#include "ui/base/models/menu_model.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/text_utils.h"
#include "ui/gfx/win/hwnd_util.h"
#include "ui/native_theme/native_theme.h"
#include "ui/native_theme/native_theme_win.h"
#include "ui/views/controls/menu/menu_config.h"
#include "ui/views/controls/menu/menu_insertion_delegate_win.h"
#include "ui/views/controls/menu/menu_listener.h"
#include "ui/views/layout/layout_constants.h"
using ui::NativeTheme;
namespace views {
// The width of an icon, including the pixels between the icon and
// the item label.
static const int kIconWidth = 23;
// 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;
// The width for displaying the sub-menu arrow.
static const int kArrowWidth = 10;
struct NativeMenuWin::ItemData {
// The Windows API requires that whoever creates the menus must own the
// strings used for labels, and keep them around for the lifetime of the
// created menu. So be it.
base::string16 label;
// Someone needs to own submenus, it may as well be us.
scoped_ptr<Menu2> submenu;
// We need a pointer back to the containing menu in various circumstances.
NativeMenuWin* native_menu_win;
// The index of the item within the menu's model.
int model_index;
};
// Returns the NativeMenuWin for a particular HMENU.
static NativeMenuWin* GetNativeMenuWinFromHMENU(HMENU hmenu) {
MENUINFO mi = {0};
mi.cbSize = sizeof(mi);
mi.fMask = MIM_MENUDATA | MIM_STYLE;
GetMenuInfo(hmenu, &mi);
return reinterpret_cast<NativeMenuWin*>(mi.dwMenuData);
}
// A window that receives messages from Windows relevant to the native menu
// structure we have constructed in NativeMenuWin.
class NativeMenuWin::MenuHostWindow {
public:
explicit MenuHostWindow(NativeMenuWin* parent) : parent_(parent) {
RegisterClass();
hwnd_ = CreateWindowEx(l10n_util::GetExtendedStyles(), kWindowClassName,
L"", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
gfx::CheckWindowCreated(hwnd_);
gfx::SetWindowUserData(hwnd_, this);
}
~MenuHostWindow() {
DestroyWindow(hwnd_);
}
HWND hwnd() const { return hwnd_; }
private:
static const wchar_t* kWindowClassName;
void RegisterClass() {
static bool registered = false;
if (registered)
return;
WNDCLASSEX window_class;
base::win::InitializeWindowClass(
kWindowClassName,
&base::win::WrappedWindowProc<MenuHostWindowProc>,
CS_DBLCLKS,
0,
0,
NULL,
reinterpret_cast<HBRUSH>(COLOR_WINDOW+1),
NULL,
NULL,
NULL,
&window_class);
ATOM clazz = RegisterClassEx(&window_class);
CHECK(clazz);
registered = true;
}
// Converts the WPARAM value passed to WM_MENUSELECT into an index
// corresponding to the menu item that was selected.
int GetMenuItemIndexFromWPARAM(HMENU menu, WPARAM w_param) const {
int count = GetMenuItemCount(menu);
// For normal command menu items, Windows passes a command id as the LOWORD
// of WPARAM for WM_MENUSELECT. We need to walk forward through the menu
// items to find an item with a matching ID. Ugh!
for (int i = 0; i < count; ++i) {
MENUITEMINFO mii = {0};
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_ID;
GetMenuItemInfo(menu, i, MF_BYPOSITION, &mii);
if (mii.wID == w_param)
return i;
}
// If we didn't find a matching command ID, this means a submenu has been
// selected instead, and rather than passing a command ID in
// LOWORD(w_param), Windows has actually passed us a position, so we just
// return it.
return w_param;
}
NativeMenuWin::ItemData* GetItemData(ULONG_PTR item_data) {
return reinterpret_cast<NativeMenuWin::ItemData*>(item_data);
}
// Called when the user selects a specific item.
void OnMenuCommand(int position, HMENU menu) {
NativeMenuWin* menu_win = GetNativeMenuWinFromHMENU(menu);
ui::MenuModel* model = menu_win->model_;
NativeMenuWin* root_menu = menu_win;
while (root_menu->parent_)
root_menu = root_menu->parent_;
// Only notify the model if it didn't already send out notification.
// See comment in MenuMessageHook for details.
if (root_menu->menu_action_ == MenuWrapper::MENU_ACTION_NONE)
model->ActivatedAt(position);
}
// Called as the user moves their mouse or arrows through the contents of the
// menu.
void OnMenuSelect(WPARAM w_param, HMENU menu) {
if (!menu)
return; // menu is null when closing on XP.
int position = GetMenuItemIndexFromWPARAM(menu, w_param);
if (position >= 0)
GetNativeMenuWinFromHMENU(menu)->model_->HighlightChangedTo(position);
}
// Called by Windows to measure the size of an owner-drawn menu item.
void OnMeasureItem(WPARAM w_param, MEASUREITEMSTRUCT* measure_item_struct) {
NativeMenuWin::ItemData* data = GetItemData(measure_item_struct->itemData);
if (data) {
gfx::FontList font_list;
measure_item_struct->itemWidth =
gfx::GetStringWidth(data->label, font_list) +
kIconWidth + kItemLeftMargin + views::kItemLabelSpacing -
GetSystemMetrics(SM_CXMENUCHECK);
if (data->submenu.get())
measure_item_struct->itemWidth += kArrowWidth;
// If the label contains an accelerator, make room for tab.
if (data->label.find(L'\t') != base::string16::npos)
measure_item_struct->itemWidth += gfx::GetStringWidth(L" ", font_list);
measure_item_struct->itemHeight =
font_list.GetHeight() + kItemBottomMargin + kItemTopMargin;
} else {
// Measure separator size.
measure_item_struct->itemHeight = GetSystemMetrics(SM_CYMENU) / 2;
measure_item_struct->itemWidth = 0;
}
}
// Called by Windows to paint an owner-drawn menu item.
void OnDrawItem(UINT w_param, DRAWITEMSTRUCT* draw_item_struct) {
HDC dc = draw_item_struct->hDC;
COLORREF prev_bg_color, prev_text_color;
// Set background color and text color
if (draw_item_struct->itemState & ODS_SELECTED) {
prev_bg_color = SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
prev_text_color = SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
} else {
prev_bg_color = SetBkColor(dc, GetSysColor(COLOR_MENU));
if (draw_item_struct->itemState & ODS_DISABLED)
prev_text_color = SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT));
else
prev_text_color = SetTextColor(dc, GetSysColor(COLOR_MENUTEXT));
}
if (draw_item_struct->itemData) {
NativeMenuWin::ItemData* data = GetItemData(draw_item_struct->itemData);
// Draw the background.
HBRUSH hbr = CreateSolidBrush(GetBkColor(dc));
FillRect(dc, &draw_item_struct->rcItem, hbr);
DeleteObject(hbr);
// Draw the label.
RECT rect = draw_item_struct->rcItem;
rect.top += kItemTopMargin;
// Should we add kIconWidth only when icon.width() != 0 ?
rect.left += kItemLeftMargin + kIconWidth;
rect.right -= views::kItemLabelSpacing;
UINT format = DT_TOP | DT_SINGLELINE;
// Check whether the mnemonics should be underlined.
BOOL underline_mnemonics;
SystemParametersInfo(SPI_GETKEYBOARDCUES, 0, &underline_mnemonics, 0);
if (!underline_mnemonics)
format |= DT_HIDEPREFIX;
gfx::FontList font_list;
HGDIOBJ old_font = static_cast<HFONT>(
SelectObject(dc, font_list.GetPrimaryFont().GetNativeFont()));
// If an accelerator is specified (with a tab delimiting the rest of the
// label from the accelerator), we have to justify the fist part on the
// left and the accelerator on the right.
// TODO(jungshik): This will break in RTL UI. Currently, he/ar use the
// window system UI font and will not hit here.
base::string16 label = data->label;
base::string16 accel;
base::string16::size_type tab_pos = label.find(L'\t');
if (tab_pos != base::string16::npos) {
accel = label.substr(tab_pos);
label = label.substr(0, tab_pos);
}
DrawTextEx(dc, const_cast<wchar_t*>(label.data()),
static_cast<int>(label.size()), &rect, format | DT_LEFT, NULL);
if (!accel.empty())
DrawTextEx(dc, const_cast<wchar_t*>(accel.data()),
static_cast<int>(accel.size()), &rect,
format | DT_RIGHT, NULL);
SelectObject(dc, old_font);
ui::MenuModel::ItemType type =
data->native_menu_win->model_->GetTypeAt(data->model_index);
// Draw the icon after the label, otherwise it would be covered
// by the label.
gfx::Image icon;
if (data->native_menu_win->model_->GetIconAt(data->model_index, &icon)) {
// We currently don't support items with both icons and checkboxes.
const gfx::ImageSkia* skia_icon = icon.ToImageSkia();
DCHECK(type != ui::MenuModel::TYPE_CHECK);
gfx::Canvas canvas(
skia_icon->GetRepresentation(1.0f),
false);
skia::DrawToNativeContext(
canvas.sk_canvas(), dc,
draw_item_struct->rcItem.left + kItemLeftMargin,
draw_item_struct->rcItem.top + (draw_item_struct->rcItem.bottom -
draw_item_struct->rcItem.top - skia_icon->height()) / 2, NULL);
} else if (type == ui::MenuModel::TYPE_CHECK &&
data->native_menu_win->model_->IsItemCheckedAt(
data->model_index)) {
// Manually render a checkbox.
const MenuConfig& config = MenuConfig::instance();
NativeTheme::State state;
if (draw_item_struct->itemState & ODS_DISABLED) {
state = NativeTheme::kDisabled;
} else {
state = draw_item_struct->itemState & ODS_SELECTED ?
NativeTheme::kHovered : NativeTheme::kNormal;
}
gfx::Canvas canvas(gfx::Size(config.check_width, config.check_height),
1.0f,
false);
NativeTheme::ExtraParams extra;
extra.menu_check.is_radio = false;
gfx::Rect bounds(0, 0, config.check_width, config.check_height);
// Draw the background and the check.
ui::NativeThemeWin* native_theme = ui::NativeThemeWin::instance();
native_theme->Paint(
canvas.sk_canvas(), NativeTheme::kMenuCheckBackground,
state, bounds, extra);
native_theme->Paint(
canvas.sk_canvas(), NativeTheme::kMenuCheck, state, bounds, extra);
// Draw checkbox to menu.
skia::DrawToNativeContext(canvas.sk_canvas(), dc,
draw_item_struct->rcItem.left + kItemLeftMargin,
draw_item_struct->rcItem.top + (draw_item_struct->rcItem.bottom -
draw_item_struct->rcItem.top - config.check_height) / 2, NULL);
}
} else {
// Draw the separator
draw_item_struct->rcItem.top +=
(draw_item_struct->rcItem.bottom - draw_item_struct->rcItem.top) / 3;
DrawEdge(dc, &draw_item_struct->rcItem, EDGE_ETCHED, BF_TOP);
}
SetBkColor(dc, prev_bg_color);
SetTextColor(dc, prev_text_color);
}
bool ProcessWindowMessage(HWND window,
UINT message,
WPARAM w_param,
LPARAM l_param,
LRESULT* l_result) {
switch (message) {
case WM_MENUCOMMAND:
OnMenuCommand(w_param, reinterpret_cast<HMENU>(l_param));
*l_result = 0;
return true;
case WM_MENUSELECT:
OnMenuSelect(LOWORD(w_param), reinterpret_cast<HMENU>(l_param));
*l_result = 0;
return true;
case WM_MEASUREITEM:
OnMeasureItem(w_param, reinterpret_cast<MEASUREITEMSTRUCT*>(l_param));
*l_result = 0;
return true;
case WM_DRAWITEM:
OnDrawItem(w_param, reinterpret_cast<DRAWITEMSTRUCT*>(l_param));
*l_result = 0;
return true;
// TODO(beng): bring over owner draw from old menu system.
}
return false;
}
static LRESULT CALLBACK MenuHostWindowProc(HWND window,
UINT message,
WPARAM w_param,
LPARAM l_param) {
MenuHostWindow* host =
reinterpret_cast<MenuHostWindow*>(gfx::GetWindowUserData(window));
// host is null during initial construction.
LRESULT l_result = 0;
if (!host || !host->ProcessWindowMessage(window, message, w_param, l_param,
&l_result)) {
return DefWindowProc(window, message, w_param, l_param);
}
return l_result;
}
HWND hwnd_;
NativeMenuWin* parent_;
DISALLOW_COPY_AND_ASSIGN(MenuHostWindow);
};
struct NativeMenuWin::HighlightedMenuItemInfo {
HighlightedMenuItemInfo()
: has_parent(false),
has_submenu(false),
menu(NULL),
position(-1) {
}
bool has_parent;
bool has_submenu;
// The menu and position. These are only set for non-disabled menu items.
NativeMenuWin* menu;
int position;
};
// static
const wchar_t* NativeMenuWin::MenuHostWindow::kWindowClassName =
L"ViewsMenuHostWindow";
////////////////////////////////////////////////////////////////////////////////
// NativeMenuWin, public:
NativeMenuWin::NativeMenuWin(ui::MenuModel* model, HWND system_menu_for)
: model_(model),
menu_(NULL),
owner_draw_(l10n_util::NeedOverrideDefaultUIFont(NULL, NULL) &&
!system_menu_for),
system_menu_for_(system_menu_for),
first_item_index_(0),
menu_action_(MENU_ACTION_NONE),
menu_to_select_(NULL),
position_to_select_(-1),
parent_(NULL),
destroyed_flag_(NULL),
menu_to_select_factory_(this) {
}
NativeMenuWin::~NativeMenuWin() {
if (destroyed_flag_)
*destroyed_flag_ = true;
STLDeleteContainerPointers(items_.begin(), items_.end());
DestroyMenu(menu_);
}
////////////////////////////////////////////////////////////////////////////////
// NativeMenuWin, MenuWrapper implementation:
void NativeMenuWin::RunMenuAt(const gfx::Point& point, int alignment) {
CreateHostWindow();
UpdateStates();
UINT flags = TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RECURSE;
flags |= GetAlignmentFlags(alignment);
menu_action_ = MENU_ACTION_NONE;
// Set a hook function so we can listen for keyboard events while the
// menu is open, and store a pointer to this object in a static
// variable so the hook has access to it (ugly, but it's the
// only way).
open_native_menu_win_ = this;
HHOOK hhook = SetWindowsHookEx(WH_MSGFILTER, MenuMessageHook,
GetModuleHandle(NULL), ::GetCurrentThreadId());
// Mark that any registered listeners have not been called for this particular
// opening of the menu.
listeners_called_ = false;
// Command dispatch is done through WM_MENUCOMMAND, handled by the host
// window.
menu_to_select_ = NULL;
position_to_select_ = -1;
menu_to_select_factory_.InvalidateWeakPtrs();
bool destroyed = false;
destroyed_flag_ = &destroyed;
model_->MenuWillShow();
TrackPopupMenu(menu_, flags, point.x(), point.y(), 0, host_window_->hwnd(),
NULL);
UnhookWindowsHookEx(hhook);
open_native_menu_win_ = NULL;
if (destroyed)
return;
destroyed_flag_ = NULL;
if (menu_to_select_) {
// Folks aren't too happy if we notify immediately. In particular, notifying
// the delegate can cause destruction leaving the stack in a weird
// state. Instead post a task, then notify. This mirrors what WM_MENUCOMMAND
// does.
menu_to_select_factory_.InvalidateWeakPtrs();
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&NativeMenuWin::DelayedSelect,
menu_to_select_factory_.GetWeakPtr()));
menu_action_ = MENU_ACTION_SELECTED;
}
// Send MenuClosed after we schedule the select, otherwise MenuClosed is
// processed after the select (MenuClosed posts a delayed task too).
model_->MenuClosed();
}
void NativeMenuWin::CancelMenu() {
EndMenu();
}
void NativeMenuWin::Rebuild(MenuInsertionDelegateWin* delegate) {
ResetNativeMenu();
items_.clear();
owner_draw_ = model_->HasIcons() || owner_draw_;
first_item_index_ = delegate ? delegate->GetInsertionIndex(menu_) : 0;
for (int menu_index = first_item_index_;
menu_index < first_item_index_ + model_->GetItemCount(); ++menu_index) {
int model_index = menu_index - first_item_index_;
if (model_->GetTypeAt(model_index) == ui::MenuModel::TYPE_SEPARATOR)
AddSeparatorItemAt(menu_index, model_index);
else
AddMenuItemAt(menu_index, model_index);
}
}
void NativeMenuWin::UpdateStates() {
// A depth-first walk of the menu items, updating states.
int model_index = 0;
std::vector<ItemData*>::const_iterator it;
for (it = items_.begin(); it != items_.end(); ++it, ++model_index) {
int menu_index = model_index + first_item_index_;
SetMenuItemState(menu_index, model_->IsEnabledAt(model_index),
model_->IsItemCheckedAt(model_index), false);
if (model_->IsItemDynamicAt(model_index)) {
// TODO(atwilson): Update the icon as well (http://crbug.com/66508).
SetMenuItemLabel(menu_index, model_index,
model_->GetLabelAt(model_index));
}
Menu2* submenu = (*it)->submenu.get();
if (submenu)
submenu->UpdateStates();
}
}
HMENU NativeMenuWin::GetNativeMenu() const {
return menu_;
}
NativeMenuWin::MenuAction NativeMenuWin::GetMenuAction() const {
return menu_action_;
}
void NativeMenuWin::AddMenuListener(MenuListener* listener) {
listeners_.AddObserver(listener);
}
void NativeMenuWin::RemoveMenuListener(MenuListener* listener) {
listeners_.RemoveObserver(listener);
}
void NativeMenuWin::SetMinimumWidth(int width) {
NOTIMPLEMENTED();
}
////////////////////////////////////////////////////////////////////////////////
// NativeMenuWin, private:
// static
NativeMenuWin* NativeMenuWin::open_native_menu_win_ = NULL;
void NativeMenuWin::DelayedSelect() {
if (menu_to_select_)
menu_to_select_->model_->ActivatedAt(position_to_select_);
}
// static
bool NativeMenuWin::GetHighlightedMenuItemInfo(
HMENU menu,
HighlightedMenuItemInfo* info) {
for (int i = 0; i < ::GetMenuItemCount(menu); i++) {
UINT state = ::GetMenuState(menu, i, MF_BYPOSITION);
if (state & MF_HILITE) {
if (state & MF_POPUP) {
HMENU submenu = GetSubMenu(menu, i);
if (GetHighlightedMenuItemInfo(submenu, info))
info->has_parent = true;
else
info->has_submenu = true;
} else if (!(state & MF_SEPARATOR) && !(state & MF_DISABLED)) {
info->menu = GetNativeMenuWinFromHMENU(menu);
info->position = i;
}
return true;
}
}
return false;
}
// static
LRESULT CALLBACK NativeMenuWin::MenuMessageHook(
int n_code, WPARAM w_param, LPARAM l_param) {
LRESULT result = CallNextHookEx(NULL, n_code, w_param, l_param);
NativeMenuWin* this_ptr = open_native_menu_win_;
if (!this_ptr)
return result;
// The first time this hook is called, that means the menu has successfully
// opened, so call the callback function on all of our listeners.
if (!this_ptr->listeners_called_) {
FOR_EACH_OBSERVER(MenuListener, this_ptr->listeners_, OnMenuOpened());
this_ptr->listeners_called_ = true;
}
MSG* msg = reinterpret_cast<MSG*>(l_param);
if (msg->message == WM_LBUTTONUP || msg->message == WM_RBUTTONUP) {
HighlightedMenuItemInfo info;
if (GetHighlightedMenuItemInfo(this_ptr->menu_, &info) && info.menu) {
// It appears that when running a menu by way of TrackPopupMenu(Ex) win32
// gets confused if the underlying window paints itself. As its very easy
// for the underlying window to repaint itself (especially since some menu
// items trigger painting of the tabstrip on mouse over) we have this
// workaround. When the mouse is released on a menu item we remember the
// menu item and end the menu. When the nested message loop returns we
// schedule a task to notify the model. It's still possible to get a
// WM_MENUCOMMAND, so we have to be careful that we don't notify the model
// twice.
this_ptr->menu_to_select_ = info.menu;
this_ptr->position_to_select_ = info.position;
EndMenu();
}
} else if (msg->message == WM_KEYDOWN) {
HighlightedMenuItemInfo info;
if (GetHighlightedMenuItemInfo(this_ptr->menu_, &info)) {
if (msg->wParam == VK_LEFT && !info.has_parent) {
this_ptr->menu_action_ = MENU_ACTION_PREVIOUS;
::EndMenu();
} else if (msg->wParam == VK_RIGHT && !info.has_parent &&
!info.has_submenu) {
this_ptr->menu_action_ = MENU_ACTION_NEXT;
::EndMenu();
}
}
}
return result;
}
bool NativeMenuWin::IsSeparatorItemAt(int menu_index) const {
MENUITEMINFO mii = {0};
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_FTYPE;
GetMenuItemInfo(menu_, menu_index, MF_BYPOSITION, &mii);
return !!(mii.fType & MF_SEPARATOR);
}
void NativeMenuWin::AddMenuItemAt(int menu_index, int model_index) {
MENUITEMINFO mii = {0};
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_FTYPE | MIIM_ID | MIIM_DATA;
if (!owner_draw_)
mii.fType = MFT_STRING;
else
mii.fType = MFT_OWNERDRAW;
ItemData* item_data = new ItemData;
item_data->label = base::string16();
ui::MenuModel::ItemType type = model_->GetTypeAt(model_index);
if (type == ui::MenuModel::TYPE_SUBMENU) {
item_data->submenu.reset(new Menu2(model_->GetSubmenuModelAt(model_index)));
mii.fMask |= MIIM_SUBMENU;
mii.hSubMenu = item_data->submenu->GetNativeMenu();
GetNativeMenuWinFromHMENU(mii.hSubMenu)->parent_ = this;
} else {
if (type == ui::MenuModel::TYPE_RADIO)
mii.fType |= MFT_RADIOCHECK;
mii.wID = model_->GetCommandIdAt(model_index);
}
item_data->native_menu_win = this;
item_data->model_index = model_index;
items_.insert(items_.begin() + model_index, item_data);
mii.dwItemData = reinterpret_cast<ULONG_PTR>(item_data);
UpdateMenuItemInfoForString(&mii, model_index,
model_->GetLabelAt(model_index));
InsertMenuItem(menu_, menu_index, TRUE, &mii);
}
void NativeMenuWin::AddSeparatorItemAt(int menu_index, int model_index) {
MENUITEMINFO mii = {0};
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_FTYPE;
mii.fType = MFT_SEPARATOR;
// Insert a dummy entry into our label list so we can index directly into it
// using item indices if need be.
items_.insert(items_.begin() + model_index, new ItemData);
InsertMenuItem(menu_, menu_index, TRUE, &mii);
}
void NativeMenuWin::SetMenuItemState(int menu_index, bool enabled, bool checked,
bool is_default) {
if (IsSeparatorItemAt(menu_index))
return;
UINT state = enabled ? MFS_ENABLED : MFS_DISABLED;
if (checked)
state |= MFS_CHECKED;
if (is_default)
state |= MFS_DEFAULT;
MENUITEMINFO mii = {0};
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_STATE;
mii.fState = state;
SetMenuItemInfo(menu_, menu_index, MF_BYPOSITION, &mii);
}
void NativeMenuWin::SetMenuItemLabel(int menu_index,
int model_index,
const base::string16& label) {
if (IsSeparatorItemAt(menu_index))
return;
MENUITEMINFO mii = {0};
mii.cbSize = sizeof(mii);
UpdateMenuItemInfoForString(&mii, model_index, label);
SetMenuItemInfo(menu_, menu_index, MF_BYPOSITION, &mii);
}
void NativeMenuWin::UpdateMenuItemInfoForString(MENUITEMINFO* mii,
int model_index,
const base::string16& label) {
base::string16 formatted = label;
ui::MenuModel::ItemType type = model_->GetTypeAt(model_index);
// Strip out any tabs, otherwise they get interpreted as accelerators and can
// lead to weird behavior.
base::ReplaceSubstringsAfterOffset(&formatted, 0, L"\t", L" ");
if (type != ui::MenuModel::TYPE_SUBMENU) {
// Add accelerator details to the label if provided.
ui::Accelerator accelerator(ui::VKEY_UNKNOWN, ui::EF_NONE);
if (model_->GetAcceleratorAt(model_index, &accelerator)) {
formatted += L"\t";
formatted += accelerator.GetShortcutText();
}
}
// Update the owned string, since Windows will want us to keep this new
// version around.
items_[model_index]->label = formatted;
// Give Windows a pointer to the label string.
mii->fMask |= MIIM_STRING;
mii->dwTypeData =
const_cast<wchar_t*>(items_[model_index]->label.c_str());
}
UINT NativeMenuWin::GetAlignmentFlags(int alignment) const {
UINT alignment_flags = TPM_TOPALIGN;
if (alignment == Menu2::ALIGN_TOPLEFT)
alignment_flags |= TPM_LEFTALIGN;
else if (alignment == Menu2::ALIGN_TOPRIGHT)
alignment_flags |= TPM_RIGHTALIGN;
return alignment_flags;
}
void NativeMenuWin::ResetNativeMenu() {
if (IsWindow(system_menu_for_)) {
if (menu_)
GetSystemMenu(system_menu_for_, TRUE);
menu_ = GetSystemMenu(system_menu_for_, FALSE);
} else {
if (menu_)
DestroyMenu(menu_);
menu_ = CreatePopupMenu();
// Rather than relying on the return value of TrackPopupMenuEx, which is
// always a command identifier, instead we tell the menu to notify us via
// our host window and the WM_MENUCOMMAND message.
MENUINFO mi = {0};
mi.cbSize = sizeof(mi);
mi.fMask = MIM_STYLE | MIM_MENUDATA;
mi.dwStyle = MNS_NOTIFYBYPOS;
mi.dwMenuData = reinterpret_cast<ULONG_PTR>(this);
SetMenuInfo(menu_, &mi);
}
}
void NativeMenuWin::CreateHostWindow() {
// This only gets called from RunMenuAt, and as such there is only ever one
// host window per menu hierarchy, no matter how many NativeMenuWin objects
// exist wrapping submenus.
if (!host_window_.get())
host_window_.reset(new MenuHostWindow(this));
}
////////////////////////////////////////////////////////////////////////////////
// MenuWrapper, public:
// static
MenuWrapper* MenuWrapper::CreateWrapper(ui::MenuModel* model) {
return new NativeMenuWin(model, NULL);
}
} // namespace views
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