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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/views/controls/menu/native_menu_win.h" | |
| 6 | |
| 7 #include <Windowsx.h> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "base/message_loop/message_loop.h" | |
| 12 #include "base/stl_util.h" | |
| 13 #include "base/strings/string_util.h" | |
| 14 #include "base/win/wrapped_window_proc.h" | |
| 15 #include "ui/base/accelerators/accelerator.h" | |
| 16 #include "ui/base/l10n/l10n_util.h" | |
| 17 #include "ui/base/l10n/l10n_util_win.h" | |
| 18 #include "ui/base/models/menu_model.h" | |
| 19 #include "ui/events/keycodes/keyboard_codes.h" | |
| 20 #include "ui/gfx/canvas.h" | |
| 21 #include "ui/gfx/font_list.h" | |
| 22 #include "ui/gfx/geometry/rect.h" | |
| 23 #include "ui/gfx/image/image.h" | |
| 24 #include "ui/gfx/image/image_skia.h" | |
| 25 #include "ui/gfx/text_utils.h" | |
| 26 #include "ui/gfx/win/hwnd_util.h" | |
| 27 #include "ui/native_theme/native_theme.h" | |
| 28 #include "ui/native_theme/native_theme_win.h" | |
| 29 #include "ui/views/controls/menu/menu_2.h" | |
| 30 #include "ui/views/controls/menu/menu_config.h" | |
| 31 #include "ui/views/controls/menu/menu_insertion_delegate_win.h" | |
| 32 #include "ui/views/controls/menu/menu_listener.h" | |
| 33 #include "ui/views/layout/layout_constants.h" | |
| 34 | |
| 35 using ui::NativeTheme; | |
| 36 | |
| 37 namespace views { | |
| 38 | |
| 39 // The width of an icon, including the pixels between the icon and | |
| 40 // the item label. | |
| 41 static const int kIconWidth = 23; | |
| 42 // Margins between the top of the item and the label. | |
| 43 static const int kItemTopMargin = 3; | |
| 44 // Margins between the bottom of the item and the label. | |
| 45 static const int kItemBottomMargin = 4; | |
| 46 // Margins between the left of the item and the icon. | |
| 47 static const int kItemLeftMargin = 4; | |
| 48 // The width for displaying the sub-menu arrow. | |
| 49 static const int kArrowWidth = 10; | |
| 50 | |
| 51 struct NativeMenuWin::ItemData { | |
| 52 // The Windows API requires that whoever creates the menus must own the | |
| 53 // strings used for labels, and keep them around for the lifetime of the | |
| 54 // created menu. So be it. | |
| 55 base::string16 label; | |
| 56 | |
| 57 // Someone needs to own submenus, it may as well be us. | |
| 58 scoped_ptr<Menu2> submenu; | |
| 59 | |
| 60 // We need a pointer back to the containing menu in various circumstances. | |
| 61 NativeMenuWin* native_menu_win; | |
| 62 | |
| 63 // The index of the item within the menu's model. | |
| 64 int model_index; | |
| 65 }; | |
| 66 | |
| 67 // Returns the NativeMenuWin for a particular HMENU. | |
| 68 static NativeMenuWin* GetNativeMenuWinFromHMENU(HMENU hmenu) { | |
| 69 MENUINFO mi = {0}; | |
| 70 mi.cbSize = sizeof(mi); | |
| 71 mi.fMask = MIM_MENUDATA | MIM_STYLE; | |
| 72 GetMenuInfo(hmenu, &mi); | |
| 73 return reinterpret_cast<NativeMenuWin*>(mi.dwMenuData); | |
| 74 } | |
| 75 | |
| 76 // A window that receives messages from Windows relevant to the native menu | |
| 77 // structure we have constructed in NativeMenuWin. | |
| 78 class NativeMenuWin::MenuHostWindow { | |
| 79 public: | |
| 80 explicit MenuHostWindow(NativeMenuWin* parent) : parent_(parent) { | |
| 81 RegisterClass(); | |
| 82 hwnd_ = CreateWindowEx(l10n_util::GetExtendedStyles(), kWindowClassName, | |
| 83 L"", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL); | |
| 84 gfx::CheckWindowCreated(hwnd_); | |
| 85 gfx::SetWindowUserData(hwnd_, this); | |
| 86 } | |
| 87 | |
| 88 ~MenuHostWindow() { | |
| 89 DestroyWindow(hwnd_); | |
| 90 } | |
| 91 | |
| 92 HWND hwnd() const { return hwnd_; } | |
| 93 | |
| 94 private: | |
| 95 static const wchar_t* kWindowClassName; | |
| 96 | |
| 97 void RegisterClass() { | |
| 98 static bool registered = false; | |
| 99 if (registered) | |
| 100 return; | |
| 101 | |
| 102 WNDCLASSEX window_class; | |
| 103 base::win::InitializeWindowClass( | |
| 104 kWindowClassName, | |
| 105 &base::win::WrappedWindowProc<MenuHostWindowProc>, | |
| 106 CS_DBLCLKS, | |
| 107 0, | |
| 108 0, | |
| 109 NULL, | |
| 110 reinterpret_cast<HBRUSH>(COLOR_WINDOW+1), | |
| 111 NULL, | |
| 112 NULL, | |
| 113 NULL, | |
| 114 &window_class); | |
| 115 ATOM clazz = RegisterClassEx(&window_class); | |
| 116 CHECK(clazz); | |
| 117 registered = true; | |
| 118 } | |
| 119 | |
| 120 // Converts the WPARAM value passed to WM_MENUSELECT into an index | |
| 121 // corresponding to the menu item that was selected. | |
| 122 int GetMenuItemIndexFromWPARAM(HMENU menu, WPARAM w_param) const { | |
| 123 int count = GetMenuItemCount(menu); | |
| 124 // For normal command menu items, Windows passes a command id as the LOWORD | |
| 125 // of WPARAM for WM_MENUSELECT. We need to walk forward through the menu | |
| 126 // items to find an item with a matching ID. Ugh! | |
| 127 for (int i = 0; i < count; ++i) { | |
| 128 MENUITEMINFO mii = {0}; | |
| 129 mii.cbSize = sizeof(mii); | |
| 130 mii.fMask = MIIM_ID; | |
| 131 GetMenuItemInfo(menu, i, MF_BYPOSITION, &mii); | |
| 132 if (mii.wID == w_param) | |
| 133 return i; | |
| 134 } | |
| 135 // If we didn't find a matching command ID, this means a submenu has been | |
| 136 // selected instead, and rather than passing a command ID in | |
| 137 // LOWORD(w_param), Windows has actually passed us a position, so we just | |
| 138 // return it. | |
| 139 return w_param; | |
| 140 } | |
| 141 | |
| 142 NativeMenuWin::ItemData* GetItemData(ULONG_PTR item_data) { | |
| 143 return reinterpret_cast<NativeMenuWin::ItemData*>(item_data); | |
| 144 } | |
| 145 | |
| 146 // Called when the user selects a specific item. | |
| 147 void OnMenuCommand(int position, HMENU menu) { | |
| 148 NativeMenuWin* menu_win = GetNativeMenuWinFromHMENU(menu); | |
| 149 ui::MenuModel* model = menu_win->model_; | |
| 150 NativeMenuWin* root_menu = menu_win; | |
| 151 while (root_menu->parent_) | |
| 152 root_menu = root_menu->parent_; | |
| 153 | |
| 154 // Only notify the model if it didn't already send out notification. | |
| 155 // See comment in MenuMessageHook for details. | |
| 156 if (root_menu->menu_action_ == MenuWrapper::MENU_ACTION_NONE) | |
| 157 model->ActivatedAt(position); | |
| 158 } | |
| 159 | |
| 160 // Called as the user moves their mouse or arrows through the contents of the | |
| 161 // menu. | |
| 162 void OnMenuSelect(WPARAM w_param, HMENU menu) { | |
| 163 if (!menu) | |
| 164 return; // menu is null when closing on XP. | |
| 165 | |
| 166 int position = GetMenuItemIndexFromWPARAM(menu, w_param); | |
| 167 if (position >= 0) | |
| 168 GetNativeMenuWinFromHMENU(menu)->model_->HighlightChangedTo(position); | |
| 169 } | |
| 170 | |
| 171 // Called by Windows to measure the size of an owner-drawn menu item. | |
| 172 void OnMeasureItem(WPARAM w_param, MEASUREITEMSTRUCT* measure_item_struct) { | |
| 173 NativeMenuWin::ItemData* data = GetItemData(measure_item_struct->itemData); | |
| 174 if (data) { | |
| 175 gfx::FontList font_list; | |
| 176 measure_item_struct->itemWidth = | |
| 177 gfx::GetStringWidth(data->label, font_list) + | |
| 178 kIconWidth + kItemLeftMargin + views::kItemLabelSpacing - | |
| 179 GetSystemMetrics(SM_CXMENUCHECK); | |
| 180 if (data->submenu.get()) | |
| 181 measure_item_struct->itemWidth += kArrowWidth; | |
| 182 // If the label contains an accelerator, make room for tab. | |
| 183 if (data->label.find(L'\t') != base::string16::npos) | |
| 184 measure_item_struct->itemWidth += gfx::GetStringWidth(L" ", font_list); | |
| 185 measure_item_struct->itemHeight = | |
| 186 font_list.GetHeight() + kItemBottomMargin + kItemTopMargin; | |
| 187 } else { | |
| 188 // Measure separator size. | |
| 189 measure_item_struct->itemHeight = GetSystemMetrics(SM_CYMENU) / 2; | |
| 190 measure_item_struct->itemWidth = 0; | |
| 191 } | |
| 192 } | |
| 193 | |
| 194 // Called by Windows to paint an owner-drawn menu item. | |
| 195 void OnDrawItem(UINT w_param, DRAWITEMSTRUCT* draw_item_struct) { | |
| 196 HDC dc = draw_item_struct->hDC; | |
| 197 COLORREF prev_bg_color, prev_text_color; | |
| 198 | |
| 199 // Set background color and text color | |
| 200 if (draw_item_struct->itemState & ODS_SELECTED) { | |
| 201 prev_bg_color = SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT)); | |
| 202 prev_text_color = SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT)); | |
| 203 } else { | |
| 204 prev_bg_color = SetBkColor(dc, GetSysColor(COLOR_MENU)); | |
| 205 if (draw_item_struct->itemState & ODS_DISABLED) | |
| 206 prev_text_color = SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT)); | |
| 207 else | |
| 208 prev_text_color = SetTextColor(dc, GetSysColor(COLOR_MENUTEXT)); | |
| 209 } | |
| 210 | |
| 211 if (draw_item_struct->itemData) { | |
| 212 NativeMenuWin::ItemData* data = GetItemData(draw_item_struct->itemData); | |
| 213 // Draw the background. | |
| 214 HBRUSH hbr = CreateSolidBrush(GetBkColor(dc)); | |
| 215 FillRect(dc, &draw_item_struct->rcItem, hbr); | |
| 216 DeleteObject(hbr); | |
| 217 | |
| 218 // Draw the label. | |
| 219 RECT rect = draw_item_struct->rcItem; | |
| 220 rect.top += kItemTopMargin; | |
| 221 // Should we add kIconWidth only when icon.width() != 0 ? | |
| 222 rect.left += kItemLeftMargin + kIconWidth; | |
| 223 rect.right -= views::kItemLabelSpacing; | |
| 224 UINT format = DT_TOP | DT_SINGLELINE; | |
| 225 // Check whether the mnemonics should be underlined. | |
| 226 BOOL underline_mnemonics; | |
| 227 SystemParametersInfo(SPI_GETKEYBOARDCUES, 0, &underline_mnemonics, 0); | |
| 228 if (!underline_mnemonics) | |
| 229 format |= DT_HIDEPREFIX; | |
| 230 gfx::FontList font_list; | |
| 231 HGDIOBJ old_font = static_cast<HFONT>( | |
| 232 SelectObject(dc, font_list.GetPrimaryFont().GetNativeFont())); | |
| 233 | |
| 234 // If an accelerator is specified (with a tab delimiting the rest of the | |
| 235 // label from the accelerator), we have to justify the fist part on the | |
| 236 // left and the accelerator on the right. | |
| 237 // TODO(jungshik): This will break in RTL UI. Currently, he/ar use the | |
| 238 // window system UI font and will not hit here. | |
| 239 base::string16 label = data->label; | |
| 240 base::string16 accel; | |
| 241 base::string16::size_type tab_pos = label.find(L'\t'); | |
| 242 if (tab_pos != base::string16::npos) { | |
| 243 accel = label.substr(tab_pos); | |
| 244 label = label.substr(0, tab_pos); | |
| 245 } | |
| 246 DrawTextEx(dc, const_cast<wchar_t*>(label.data()), | |
| 247 static_cast<int>(label.size()), &rect, format | DT_LEFT, NULL); | |
| 248 if (!accel.empty()) | |
| 249 DrawTextEx(dc, const_cast<wchar_t*>(accel.data()), | |
| 250 static_cast<int>(accel.size()), &rect, | |
| 251 format | DT_RIGHT, NULL); | |
| 252 SelectObject(dc, old_font); | |
| 253 | |
| 254 ui::MenuModel::ItemType type = | |
| 255 data->native_menu_win->model_->GetTypeAt(data->model_index); | |
| 256 | |
| 257 // Draw the icon after the label, otherwise it would be covered | |
| 258 // by the label. | |
| 259 gfx::Image icon; | |
| 260 if (data->native_menu_win->model_->GetIconAt(data->model_index, &icon)) { | |
| 261 // We currently don't support items with both icons and checkboxes. | |
| 262 const gfx::ImageSkia* skia_icon = icon.ToImageSkia(); | |
| 263 DCHECK(type != ui::MenuModel::TYPE_CHECK); | |
| 264 gfx::Canvas canvas( | |
| 265 skia_icon->GetRepresentation(1.0f), | |
| 266 false); | |
| 267 skia::DrawToNativeContext( | |
| 268 canvas.sk_canvas(), dc, | |
| 269 draw_item_struct->rcItem.left + kItemLeftMargin, | |
| 270 draw_item_struct->rcItem.top + (draw_item_struct->rcItem.bottom - | |
| 271 draw_item_struct->rcItem.top - skia_icon->height()) / 2, NULL); | |
| 272 } else if (type == ui::MenuModel::TYPE_CHECK && | |
| 273 data->native_menu_win->model_->IsItemCheckedAt( | |
| 274 data->model_index)) { | |
| 275 // Manually render a checkbox. | |
| 276 ui::NativeThemeWin* native_theme = ui::NativeThemeWin::instance(); | |
| 277 const MenuConfig& config = MenuConfig::instance(native_theme); | |
| 278 NativeTheme::State state; | |
| 279 if (draw_item_struct->itemState & ODS_DISABLED) { | |
| 280 state = NativeTheme::kDisabled; | |
| 281 } else { | |
| 282 state = draw_item_struct->itemState & ODS_SELECTED ? | |
| 283 NativeTheme::kHovered : NativeTheme::kNormal; | |
| 284 } | |
| 285 gfx::Canvas canvas(gfx::Size(config.check_width, config.check_height), | |
| 286 1.0f, | |
| 287 false); | |
| 288 NativeTheme::ExtraParams extra; | |
| 289 extra.menu_check.is_radio = false; | |
| 290 gfx::Rect bounds(0, 0, config.check_width, config.check_height); | |
| 291 | |
| 292 // Draw the background and the check. | |
| 293 native_theme->Paint( | |
| 294 canvas.sk_canvas(), NativeTheme::kMenuCheckBackground, | |
| 295 state, bounds, extra); | |
| 296 native_theme->Paint( | |
| 297 canvas.sk_canvas(), NativeTheme::kMenuCheck, state, bounds, extra); | |
| 298 | |
| 299 // Draw checkbox to menu. | |
| 300 skia::DrawToNativeContext(canvas.sk_canvas(), dc, | |
| 301 draw_item_struct->rcItem.left + kItemLeftMargin, | |
| 302 draw_item_struct->rcItem.top + (draw_item_struct->rcItem.bottom - | |
| 303 draw_item_struct->rcItem.top - config.check_height) / 2, NULL); | |
| 304 } | |
| 305 | |
| 306 } else { | |
| 307 // Draw the separator | |
| 308 draw_item_struct->rcItem.top += | |
| 309 (draw_item_struct->rcItem.bottom - draw_item_struct->rcItem.top) / 3; | |
| 310 DrawEdge(dc, &draw_item_struct->rcItem, EDGE_ETCHED, BF_TOP); | |
| 311 } | |
| 312 | |
| 313 SetBkColor(dc, prev_bg_color); | |
| 314 SetTextColor(dc, prev_text_color); | |
| 315 } | |
| 316 | |
| 317 bool ProcessWindowMessage(HWND window, | |
| 318 UINT message, | |
| 319 WPARAM w_param, | |
| 320 LPARAM l_param, | |
| 321 LRESULT* l_result) { | |
| 322 switch (message) { | |
| 323 case WM_MENUCOMMAND: | |
| 324 OnMenuCommand(w_param, reinterpret_cast<HMENU>(l_param)); | |
| 325 *l_result = 0; | |
| 326 return true; | |
| 327 case WM_MENUSELECT: | |
| 328 OnMenuSelect(LOWORD(w_param), reinterpret_cast<HMENU>(l_param)); | |
| 329 *l_result = 0; | |
| 330 return true; | |
| 331 case WM_MEASUREITEM: | |
| 332 OnMeasureItem(w_param, reinterpret_cast<MEASUREITEMSTRUCT*>(l_param)); | |
| 333 *l_result = 0; | |
| 334 return true; | |
| 335 case WM_DRAWITEM: | |
| 336 OnDrawItem(w_param, reinterpret_cast<DRAWITEMSTRUCT*>(l_param)); | |
| 337 *l_result = 0; | |
| 338 return true; | |
| 339 // TODO(beng): bring over owner draw from old menu system. | |
| 340 } | |
| 341 return false; | |
| 342 } | |
| 343 | |
| 344 static LRESULT CALLBACK MenuHostWindowProc(HWND window, | |
| 345 UINT message, | |
| 346 WPARAM w_param, | |
| 347 LPARAM l_param) { | |
| 348 MenuHostWindow* host = | |
| 349 reinterpret_cast<MenuHostWindow*>(gfx::GetWindowUserData(window)); | |
| 350 // host is null during initial construction. | |
| 351 LRESULT l_result = 0; | |
| 352 if (!host || !host->ProcessWindowMessage(window, message, w_param, l_param, | |
| 353 &l_result)) { | |
| 354 return DefWindowProc(window, message, w_param, l_param); | |
| 355 } | |
| 356 return l_result; | |
| 357 } | |
| 358 | |
| 359 HWND hwnd_; | |
| 360 NativeMenuWin* parent_; | |
| 361 | |
| 362 DISALLOW_COPY_AND_ASSIGN(MenuHostWindow); | |
| 363 }; | |
| 364 | |
| 365 struct NativeMenuWin::HighlightedMenuItemInfo { | |
| 366 HighlightedMenuItemInfo() | |
| 367 : has_parent(false), | |
| 368 has_submenu(false), | |
| 369 menu(NULL), | |
| 370 position(-1) { | |
| 371 } | |
| 372 | |
| 373 bool has_parent; | |
| 374 bool has_submenu; | |
| 375 | |
| 376 // The menu and position. These are only set for non-disabled menu items. | |
| 377 NativeMenuWin* menu; | |
| 378 int position; | |
| 379 }; | |
| 380 | |
| 381 // static | |
| 382 const wchar_t* NativeMenuWin::MenuHostWindow::kWindowClassName = | |
| 383 L"ViewsMenuHostWindow"; | |
| 384 | |
| 385 //////////////////////////////////////////////////////////////////////////////// | |
| 386 // NativeMenuWin, public: | |
| 387 | |
| 388 NativeMenuWin::NativeMenuWin(ui::MenuModel* model, HWND system_menu_for) | |
| 389 : model_(model), | |
| 390 menu_(NULL), | |
| 391 owner_draw_(l10n_util::NeedOverrideDefaultUIFont(NULL, NULL) && | |
| 392 !system_menu_for), | |
| 393 system_menu_for_(system_menu_for), | |
| 394 first_item_index_(0), | |
| 395 menu_action_(MENU_ACTION_NONE), | |
| 396 menu_to_select_(NULL), | |
| 397 position_to_select_(-1), | |
| 398 menu_to_select_factory_(this), | |
| 399 parent_(NULL), | |
| 400 destroyed_flag_(NULL) { | |
| 401 } | |
| 402 | |
| 403 NativeMenuWin::~NativeMenuWin() { | |
| 404 if (destroyed_flag_) | |
| 405 *destroyed_flag_ = true; | |
| 406 STLDeleteContainerPointers(items_.begin(), items_.end()); | |
| 407 DestroyMenu(menu_); | |
| 408 } | |
| 409 | |
| 410 //////////////////////////////////////////////////////////////////////////////// | |
| 411 // NativeMenuWin, MenuWrapper implementation: | |
| 412 | |
| 413 void NativeMenuWin::RunMenuAt(const gfx::Point& point, int alignment) { | |
| 414 CreateHostWindow(); | |
| 415 UpdateStates(); | |
| 416 UINT flags = TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RECURSE; | |
| 417 flags |= GetAlignmentFlags(alignment); | |
| 418 menu_action_ = MENU_ACTION_NONE; | |
| 419 | |
| 420 // Set a hook function so we can listen for keyboard events while the | |
| 421 // menu is open, and store a pointer to this object in a static | |
| 422 // variable so the hook has access to it (ugly, but it's the | |
| 423 // only way). | |
| 424 open_native_menu_win_ = this; | |
| 425 HHOOK hhook = SetWindowsHookEx(WH_MSGFILTER, MenuMessageHook, | |
| 426 GetModuleHandle(NULL), ::GetCurrentThreadId()); | |
| 427 | |
| 428 // Mark that any registered listeners have not been called for this particular | |
| 429 // opening of the menu. | |
| 430 listeners_called_ = false; | |
| 431 | |
| 432 // Command dispatch is done through WM_MENUCOMMAND, handled by the host | |
| 433 // window. | |
| 434 menu_to_select_ = NULL; | |
| 435 position_to_select_ = -1; | |
| 436 menu_to_select_factory_.InvalidateWeakPtrs(); | |
| 437 bool destroyed = false; | |
| 438 destroyed_flag_ = &destroyed; | |
| 439 model_->MenuWillShow(); | |
| 440 TrackPopupMenu(menu_, flags, point.x(), point.y(), 0, host_window_->hwnd(), | |
| 441 NULL); | |
| 442 UnhookWindowsHookEx(hhook); | |
| 443 open_native_menu_win_ = NULL; | |
| 444 if (destroyed) | |
| 445 return; | |
| 446 destroyed_flag_ = NULL; | |
| 447 if (menu_to_select_) { | |
| 448 // Folks aren't too happy if we notify immediately. In particular, notifying | |
| 449 // the delegate can cause destruction leaving the stack in a weird | |
| 450 // state. Instead post a task, then notify. This mirrors what WM_MENUCOMMAND | |
| 451 // does. | |
| 452 menu_to_select_factory_.InvalidateWeakPtrs(); | |
| 453 base::MessageLoop::current()->PostTask( | |
| 454 FROM_HERE, | |
| 455 base::Bind(&NativeMenuWin::DelayedSelect, | |
| 456 menu_to_select_factory_.GetWeakPtr())); | |
| 457 menu_action_ = MENU_ACTION_SELECTED; | |
| 458 } | |
| 459 // Send MenuClosed after we schedule the select, otherwise MenuClosed is | |
| 460 // processed after the select (MenuClosed posts a delayed task too). | |
| 461 model_->MenuClosed(); | |
| 462 } | |
| 463 | |
| 464 void NativeMenuWin::CancelMenu() { | |
| 465 EndMenu(); | |
| 466 } | |
| 467 | |
| 468 void NativeMenuWin::Rebuild(MenuInsertionDelegateWin* delegate) { | |
| 469 ResetNativeMenu(); | |
| 470 items_.clear(); | |
| 471 | |
| 472 owner_draw_ = model_->HasIcons() || owner_draw_; | |
| 473 first_item_index_ = delegate ? delegate->GetInsertionIndex(menu_) : 0; | |
| 474 for (int menu_index = first_item_index_; | |
| 475 menu_index < first_item_index_ + model_->GetItemCount(); ++menu_index) { | |
| 476 int model_index = menu_index - first_item_index_; | |
| 477 if (model_->GetTypeAt(model_index) == ui::MenuModel::TYPE_SEPARATOR) | |
| 478 AddSeparatorItemAt(menu_index, model_index); | |
| 479 else | |
| 480 AddMenuItemAt(menu_index, model_index); | |
| 481 } | |
| 482 } | |
| 483 | |
| 484 void NativeMenuWin::UpdateStates() { | |
| 485 // A depth-first walk of the menu items, updating states. | |
| 486 int model_index = 0; | |
| 487 std::vector<ItemData*>::const_iterator it; | |
| 488 for (it = items_.begin(); it != items_.end(); ++it, ++model_index) { | |
| 489 int menu_index = model_index + first_item_index_; | |
| 490 SetMenuItemState(menu_index, model_->IsEnabledAt(model_index), | |
| 491 model_->IsItemCheckedAt(model_index), false); | |
| 492 if (model_->IsItemDynamicAt(model_index)) { | |
| 493 // TODO(atwilson): Update the icon as well (http://crbug.com/66508). | |
| 494 SetMenuItemLabel(menu_index, model_index, | |
| 495 model_->GetLabelAt(model_index)); | |
| 496 } | |
| 497 Menu2* submenu = (*it)->submenu.get(); | |
| 498 if (submenu) | |
| 499 submenu->UpdateStates(); | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 HMENU NativeMenuWin::GetNativeMenu() const { | |
| 504 return menu_; | |
| 505 } | |
| 506 | |
| 507 NativeMenuWin::MenuAction NativeMenuWin::GetMenuAction() const { | |
| 508 return menu_action_; | |
| 509 } | |
| 510 | |
| 511 void NativeMenuWin::AddMenuListener(MenuListener* listener) { | |
| 512 listeners_.AddObserver(listener); | |
| 513 } | |
| 514 | |
| 515 void NativeMenuWin::RemoveMenuListener(MenuListener* listener) { | |
| 516 listeners_.RemoveObserver(listener); | |
| 517 } | |
| 518 | |
| 519 void NativeMenuWin::SetMinimumWidth(int width) { | |
| 520 NOTIMPLEMENTED(); | |
| 521 } | |
| 522 | |
| 523 //////////////////////////////////////////////////////////////////////////////// | |
| 524 // NativeMenuWin, private: | |
| 525 | |
| 526 // static | |
| 527 NativeMenuWin* NativeMenuWin::open_native_menu_win_ = NULL; | |
| 528 | |
| 529 void NativeMenuWin::DelayedSelect() { | |
| 530 if (menu_to_select_) | |
| 531 menu_to_select_->model_->ActivatedAt(position_to_select_); | |
| 532 } | |
| 533 | |
| 534 // static | |
| 535 bool NativeMenuWin::GetHighlightedMenuItemInfo( | |
| 536 HMENU menu, | |
| 537 HighlightedMenuItemInfo* info) { | |
| 538 for (int i = 0; i < ::GetMenuItemCount(menu); i++) { | |
| 539 UINT state = ::GetMenuState(menu, i, MF_BYPOSITION); | |
| 540 if (state & MF_HILITE) { | |
| 541 if (state & MF_POPUP) { | |
| 542 HMENU submenu = GetSubMenu(menu, i); | |
| 543 if (GetHighlightedMenuItemInfo(submenu, info)) | |
| 544 info->has_parent = true; | |
| 545 else | |
| 546 info->has_submenu = true; | |
| 547 } else if (!(state & MF_SEPARATOR) && !(state & MF_DISABLED)) { | |
| 548 info->menu = GetNativeMenuWinFromHMENU(menu); | |
| 549 info->position = i; | |
| 550 } | |
| 551 return true; | |
| 552 } | |
| 553 } | |
| 554 return false; | |
| 555 } | |
| 556 | |
| 557 // static | |
| 558 LRESULT CALLBACK NativeMenuWin::MenuMessageHook( | |
| 559 int n_code, WPARAM w_param, LPARAM l_param) { | |
| 560 LRESULT result = CallNextHookEx(NULL, n_code, w_param, l_param); | |
| 561 | |
| 562 NativeMenuWin* this_ptr = open_native_menu_win_; | |
| 563 if (!this_ptr) | |
| 564 return result; | |
| 565 | |
| 566 // The first time this hook is called, that means the menu has successfully | |
| 567 // opened, so call the callback function on all of our listeners. | |
| 568 if (!this_ptr->listeners_called_) { | |
| 569 FOR_EACH_OBSERVER(MenuListener, this_ptr->listeners_, OnMenuOpened()); | |
| 570 this_ptr->listeners_called_ = true; | |
| 571 } | |
| 572 | |
| 573 MSG* msg = reinterpret_cast<MSG*>(l_param); | |
| 574 if (msg->message == WM_LBUTTONUP || msg->message == WM_RBUTTONUP) { | |
| 575 HighlightedMenuItemInfo info; | |
| 576 if (GetHighlightedMenuItemInfo(this_ptr->menu_, &info) && info.menu) { | |
| 577 // It appears that when running a menu by way of TrackPopupMenu(Ex) win32 | |
| 578 // gets confused if the underlying window paints itself. As its very easy | |
| 579 // for the underlying window to repaint itself (especially since some menu | |
| 580 // items trigger painting of the tabstrip on mouse over) we have this | |
| 581 // workaround. When the mouse is released on a menu item we remember the | |
| 582 // menu item and end the menu. When the nested message loop returns we | |
| 583 // schedule a task to notify the model. It's still possible to get a | |
| 584 // WM_MENUCOMMAND, so we have to be careful that we don't notify the model | |
| 585 // twice. | |
| 586 this_ptr->menu_to_select_ = info.menu; | |
| 587 this_ptr->position_to_select_ = info.position; | |
| 588 EndMenu(); | |
| 589 } | |
| 590 } else if (msg->message == WM_KEYDOWN) { | |
| 591 HighlightedMenuItemInfo info; | |
| 592 if (GetHighlightedMenuItemInfo(this_ptr->menu_, &info)) { | |
| 593 if (msg->wParam == VK_LEFT && !info.has_parent) { | |
| 594 this_ptr->menu_action_ = MENU_ACTION_PREVIOUS; | |
| 595 ::EndMenu(); | |
| 596 } else if (msg->wParam == VK_RIGHT && !info.has_parent && | |
| 597 !info.has_submenu) { | |
| 598 this_ptr->menu_action_ = MENU_ACTION_NEXT; | |
| 599 ::EndMenu(); | |
| 600 } | |
| 601 } | |
| 602 } | |
| 603 | |
| 604 return result; | |
| 605 } | |
| 606 | |
| 607 bool NativeMenuWin::IsSeparatorItemAt(int menu_index) const { | |
| 608 MENUITEMINFO mii = {0}; | |
| 609 mii.cbSize = sizeof(mii); | |
| 610 mii.fMask = MIIM_FTYPE; | |
| 611 GetMenuItemInfo(menu_, menu_index, MF_BYPOSITION, &mii); | |
| 612 return !!(mii.fType & MF_SEPARATOR); | |
| 613 } | |
| 614 | |
| 615 void NativeMenuWin::AddMenuItemAt(int menu_index, int model_index) { | |
| 616 MENUITEMINFO mii = {0}; | |
| 617 mii.cbSize = sizeof(mii); | |
| 618 mii.fMask = MIIM_FTYPE | MIIM_ID | MIIM_DATA; | |
| 619 if (!owner_draw_) | |
| 620 mii.fType = MFT_STRING; | |
| 621 else | |
| 622 mii.fType = MFT_OWNERDRAW; | |
| 623 | |
| 624 ItemData* item_data = new ItemData; | |
| 625 item_data->label = base::string16(); | |
| 626 ui::MenuModel::ItemType type = model_->GetTypeAt(model_index); | |
| 627 if (type == ui::MenuModel::TYPE_SUBMENU) { | |
| 628 item_data->submenu.reset(new Menu2(model_->GetSubmenuModelAt(model_index))); | |
| 629 mii.fMask |= MIIM_SUBMENU; | |
| 630 mii.hSubMenu = item_data->submenu->GetNativeMenu(); | |
| 631 GetNativeMenuWinFromHMENU(mii.hSubMenu)->parent_ = this; | |
| 632 } else { | |
| 633 if (type == ui::MenuModel::TYPE_RADIO) | |
| 634 mii.fType |= MFT_RADIOCHECK; | |
| 635 mii.wID = model_->GetCommandIdAt(model_index); | |
| 636 } | |
| 637 item_data->native_menu_win = this; | |
| 638 item_data->model_index = model_index; | |
| 639 items_.insert(items_.begin() + model_index, item_data); | |
| 640 mii.dwItemData = reinterpret_cast<ULONG_PTR>(item_data); | |
| 641 UpdateMenuItemInfoForString(&mii, model_index, | |
| 642 model_->GetLabelAt(model_index)); | |
| 643 InsertMenuItem(menu_, menu_index, TRUE, &mii); | |
| 644 } | |
| 645 | |
| 646 void NativeMenuWin::AddSeparatorItemAt(int menu_index, int model_index) { | |
| 647 MENUITEMINFO mii = {0}; | |
| 648 mii.cbSize = sizeof(mii); | |
| 649 mii.fMask = MIIM_FTYPE; | |
| 650 mii.fType = MFT_SEPARATOR; | |
| 651 // Insert a dummy entry into our label list so we can index directly into it | |
| 652 // using item indices if need be. | |
| 653 items_.insert(items_.begin() + model_index, new ItemData); | |
| 654 InsertMenuItem(menu_, menu_index, TRUE, &mii); | |
| 655 } | |
| 656 | |
| 657 void NativeMenuWin::SetMenuItemState(int menu_index, bool enabled, bool checked, | |
| 658 bool is_default) { | |
| 659 if (IsSeparatorItemAt(menu_index)) | |
| 660 return; | |
| 661 | |
| 662 UINT state = enabled ? MFS_ENABLED : MFS_DISABLED; | |
| 663 if (checked) | |
| 664 state |= MFS_CHECKED; | |
| 665 if (is_default) | |
| 666 state |= MFS_DEFAULT; | |
| 667 | |
| 668 MENUITEMINFO mii = {0}; | |
| 669 mii.cbSize = sizeof(mii); | |
| 670 mii.fMask = MIIM_STATE; | |
| 671 mii.fState = state; | |
| 672 SetMenuItemInfo(menu_, menu_index, MF_BYPOSITION, &mii); | |
| 673 } | |
| 674 | |
| 675 void NativeMenuWin::SetMenuItemLabel(int menu_index, | |
| 676 int model_index, | |
| 677 const base::string16& label) { | |
| 678 if (IsSeparatorItemAt(menu_index)) | |
| 679 return; | |
| 680 | |
| 681 MENUITEMINFO mii = {0}; | |
| 682 mii.cbSize = sizeof(mii); | |
| 683 UpdateMenuItemInfoForString(&mii, model_index, label); | |
| 684 SetMenuItemInfo(menu_, menu_index, MF_BYPOSITION, &mii); | |
| 685 } | |
| 686 | |
| 687 void NativeMenuWin::UpdateMenuItemInfoForString(MENUITEMINFO* mii, | |
| 688 int model_index, | |
| 689 const base::string16& label) { | |
| 690 base::string16 formatted = label; | |
| 691 ui::MenuModel::ItemType type = model_->GetTypeAt(model_index); | |
| 692 // Strip out any tabs, otherwise they get interpreted as accelerators and can | |
| 693 // lead to weird behavior. | |
| 694 ReplaceSubstringsAfterOffset(&formatted, 0, L"\t", L" "); | |
| 695 if (type != ui::MenuModel::TYPE_SUBMENU) { | |
| 696 // Add accelerator details to the label if provided. | |
| 697 ui::Accelerator accelerator(ui::VKEY_UNKNOWN, ui::EF_NONE); | |
| 698 if (model_->GetAcceleratorAt(model_index, &accelerator)) { | |
| 699 formatted += L"\t"; | |
| 700 formatted += accelerator.GetShortcutText(); | |
| 701 } | |
| 702 } | |
| 703 | |
| 704 // Update the owned string, since Windows will want us to keep this new | |
| 705 // version around. | |
| 706 items_[model_index]->label = formatted; | |
| 707 | |
| 708 // Give Windows a pointer to the label string. | |
| 709 mii->fMask |= MIIM_STRING; | |
| 710 mii->dwTypeData = | |
| 711 const_cast<wchar_t*>(items_[model_index]->label.c_str()); | |
| 712 } | |
| 713 | |
| 714 UINT NativeMenuWin::GetAlignmentFlags(int alignment) const { | |
| 715 UINT alignment_flags = TPM_TOPALIGN; | |
| 716 if (alignment == Menu2::ALIGN_TOPLEFT) | |
| 717 alignment_flags |= TPM_LEFTALIGN; | |
| 718 else if (alignment == Menu2::ALIGN_TOPRIGHT) | |
| 719 alignment_flags |= TPM_RIGHTALIGN; | |
| 720 return alignment_flags; | |
| 721 } | |
| 722 | |
| 723 void NativeMenuWin::ResetNativeMenu() { | |
| 724 if (IsWindow(system_menu_for_)) { | |
| 725 if (menu_) | |
| 726 GetSystemMenu(system_menu_for_, TRUE); | |
| 727 menu_ = GetSystemMenu(system_menu_for_, FALSE); | |
| 728 } else { | |
| 729 if (menu_) | |
| 730 DestroyMenu(menu_); | |
| 731 menu_ = CreatePopupMenu(); | |
| 732 // Rather than relying on the return value of TrackPopupMenuEx, which is | |
| 733 // always a command identifier, instead we tell the menu to notify us via | |
| 734 // our host window and the WM_MENUCOMMAND message. | |
| 735 MENUINFO mi = {0}; | |
| 736 mi.cbSize = sizeof(mi); | |
| 737 mi.fMask = MIM_STYLE | MIM_MENUDATA; | |
| 738 mi.dwStyle = MNS_NOTIFYBYPOS; | |
| 739 mi.dwMenuData = reinterpret_cast<ULONG_PTR>(this); | |
| 740 SetMenuInfo(menu_, &mi); | |
| 741 } | |
| 742 } | |
| 743 | |
| 744 void NativeMenuWin::CreateHostWindow() { | |
| 745 // This only gets called from RunMenuAt, and as such there is only ever one | |
| 746 // host window per menu hierarchy, no matter how many NativeMenuWin objects | |
| 747 // exist wrapping submenus. | |
| 748 if (!host_window_.get()) | |
| 749 host_window_.reset(new MenuHostWindow(this)); | |
| 750 } | |
| 751 | |
| 752 //////////////////////////////////////////////////////////////////////////////// | |
| 753 // MenuWrapper, public: | |
| 754 | |
| 755 // static | |
| 756 MenuWrapper* MenuWrapper::CreateWrapper(ui::MenuModel* model) { | |
| 757 return new NativeMenuWin(model, NULL); | |
| 758 } | |
| 759 | |
| 760 } // namespace views | |
| OLD | NEW |
|---|
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