NS_IMETHODIMP EditorEventListener::HandleEvent(nsIDOMEvent* aEvent) { NS_ENSURE_TRUE(mEditorBase, NS_ERROR_FAILURE); nsCOMPtr<nsIEditor> kungFuDeathGrip = mEditorBase; Unused << kungFuDeathGrip; // mEditorBase is not referred to in this function WidgetEvent* internalEvent = aEvent->WidgetEventPtr(); // Let's handle each event with the message of the internal event of the // coming event. If the DOM event was created with improper interface, // e.g., keydown event is created with |new MouseEvent("keydown", {});|, // its message is always 0. Therefore, we can ban such strange event easy. // However, we need to handle strange "focus" and "blur" event. See the // following code of this switch statement. // NOTE: Each event handler may require specific event interface. Before // calling it, this queries the specific interface. If it would fail, // each event handler would just ignore the event. So, in this method, // you don't need to check if the QI succeeded before each call. switch (internalEvent->mMessage) { // dragenter case eDragEnter: { nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent); return DragEnter(dragEvent); } // dragover case eDragOver: { nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent); return DragOver(dragEvent); } // dragexit case eDragExit: { nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent); return DragExit(dragEvent); } // drop case eDrop: { nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent); return Drop(dragEvent); } #ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH // keydown case eKeyDown: { nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent); return KeyDown(keyEvent); } // keyup case eKeyUp: { nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent); return KeyUp(keyEvent); } #endif // #ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH // keypress case eKeyPress: { nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent); return KeyPress(keyEvent); } // mousedown case eMouseDown: { nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent); NS_ENSURE_TRUE(mouseEvent, NS_OK); // EditorEventListener may receive (1) all mousedown, mouseup and click // events, (2) only mousedown event or (3) only mouseup event. // mMouseDownOrUpConsumedByIME is used only for ignoring click event if // preceding mousedown and/or mouseup event is consumed by IME. // Therefore, even if case #2 or case #3 occurs, // mMouseDownOrUpConsumedByIME is true here. Therefore, we should always // overwrite it here. mMouseDownOrUpConsumedByIME = NotifyIMEOfMouseButtonEvent(mouseEvent); return mMouseDownOrUpConsumedByIME ? NS_OK : MouseDown(mouseEvent); } // mouseup case eMouseUp: { nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent); NS_ENSURE_TRUE(mouseEvent, NS_OK); // See above comment in the eMouseDown case, first. // This code assumes that case #1 is occuring. However, if case #3 may // occurs after case #2 and the mousedown is consumed, // mMouseDownOrUpConsumedByIME is true even though EditorEventListener // has not received the preceding mousedown event of this mouseup event. // So, mMouseDownOrUpConsumedByIME may be invalid here. However, // this is not a matter because mMouseDownOrUpConsumedByIME is referred // only by eMouseClick case but click event is fired only in case #1. // So, before a click event is fired, mMouseDownOrUpConsumedByIME is // always initialized in the eMouseDown case if it's referred. if (NotifyIMEOfMouseButtonEvent(mouseEvent)) { mMouseDownOrUpConsumedByIME = true; } return mMouseDownOrUpConsumedByIME ? NS_OK : MouseUp(mouseEvent); } // click case eMouseClick: { nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent); NS_ENSURE_TRUE(mouseEvent, NS_OK); // If the preceding mousedown event or mouseup event was consumed, // editor shouldn't handle this click event. if (mMouseDownOrUpConsumedByIME) { mMouseDownOrUpConsumedByIME = false; mouseEvent->AsEvent()->PreventDefault(); return NS_OK; } return MouseClick(mouseEvent); } // focus case eFocus: return Focus(aEvent); // blur case eBlur: return Blur(aEvent); // text case eCompositionChange: return HandleText(aEvent); // compositionstart case eCompositionStart: return HandleStartComposition(aEvent); // compositionend case eCompositionEnd: HandleEndComposition(aEvent); return NS_OK; default: break; } nsAutoString eventType; aEvent->GetType(eventType); // We should accept "focus" and "blur" event even if it's synthesized with // wrong interface for compatibility with older Gecko. if (eventType.EqualsLiteral("focus")) { return Focus(aEvent); } if (eventType.EqualsLiteral("blur")) { return Blur(aEvent); } #ifdef DEBUG nsPrintfCString assertMessage("Editor doesn't handle \"%s\" event " "because its internal event doesn't have proper message", NS_ConvertUTF16toUTF8(eventType).get()); NS_ASSERTION(false, assertMessage.get()); #endif return NS_OK; }
LRESULT CALLBACK CompStrWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { HIMC hIMC = NULL; HIMC hOldIMC = NULL; switch (message) { case WM_CREATE: hIMC = ImmCreateContext(); hOldIMC = ImmAssociateContext(hWnd,hIMC); SetWindowLongPtr(hWnd, 0, (LONG_PTR)hOldIMC); fdwProperty = ImmGetProperty(GetKeyboardLayout(0), IGP_PROPERTY); break; case WM_CHAR: HandleChar(hWnd,wParam,lParam); break; case WM_LBUTTONUP: /* fall-through */ case WM_RBUTTONUP: if (hIMC = ImmGetContext(hWnd)) { HMENU hMenu = NULL; InitMenuItemIDTable(); hMenu = CreateImeMenu(hWnd, hIMC, NULL,(message == WM_RBUTTONUP)); if (hMenu) { DWORD dwItemData; DWORD dwPos = (DWORD)GetMessagePos(); int nCmd; nCmd = TrackPopupMenuEx(hMenu, TPM_RETURNCMD | TPM_NONOTIFY | TPM_LEFTBUTTON | TPM_LEFTALIGN | TPM_TOPALIGN, LOWORD(dwPos), HIWORD(dwPos), hWnd, NULL); if (nCmd) { nCmd -= IDM_STARTIMEMENU; dwItemData = FindItemData(nCmd); ImmNotifyIME(hIMC, NI_IMEMENUSELECTED, nCmd, dwItemData); } } EndMenuItemIDTable(); DestroyMenu(hMenu); } break; case WM_IME_SETCONTEXT: if (fShowCand) { lParam &= ~ISC_SHOWUICANDIDATEWINDOW; } if (fdwProperty & IME_PROP_SPECIAL_UI) { // EMPTY } else if (fdwProperty & IME_PROP_AT_CARET) { lParam &= ~ISC_SHOWUICOMPOSITIONWINDOW; } else { // EMPTY } return (DefWindowProc(hWnd, message, wParam, lParam)); case WM_IME_STARTCOMPOSITION: // Normally, we should not call into HandleStartComposition // for IME_PROP_SPECIAL_UI and not IME_PROP_AT_CARET IMEs // we should pass this message to DefWindowProc directly for // this kind of IMEs HandleStartComposition(hWnd,wParam,lParam); // pass this message to DefWindowProc for IME_PROP_SPECIAL_UI // and not IME_PROP_AT_CARET IMEs if (fdwProperty & IME_PROP_SPECIAL_UI) { return (DefWindowProc(hWnd, message, wParam, lParam)); } else if (fdwProperty & IME_PROP_AT_CARET) { // EMPTY } else { return (DefWindowProc(hWnd, message, wParam, lParam)); } break; case WM_IME_ENDCOMPOSITION: // Normally, we should not call into HandleEndComposition // for IME_PROP_SPECIAL_UI and not IME_PROP_AT_CARET IMEs // we should pass this message to DefWindowProc directly for // this kind of IMEs HandleEndComposition(hWnd,wParam,lParam); // pass this message to DefWindowProc for IME_PROP_SPECIAL_UI // and not IME_PROP_AT_CARET IMEs if (fdwProperty & IME_PROP_SPECIAL_UI) { return (DefWindowProc(hWnd, message, wParam, lParam)); } else if (fdwProperty & IME_PROP_AT_CARET) { // EMPTY } else { return (DefWindowProc(hWnd, message, wParam, lParam)); } break; case WM_IME_COMPOSITION: // Normally, we should not call into HandleComposition // for IME_PROP_SPECIAL_UI and not IME_PROP_AT_CARET IMEs // we should pass this message to DefWindowProc directly for // this kind of IMEs HandleComposition(hWnd,wParam,lParam); // pass this message to DefWindowProc for IME_PROP_SPECIAL_UI // and not IME_PROP_AT_CARET IMEs if (fdwProperty & IME_PROP_SPECIAL_UI) { return (DefWindowProc(hWnd, message, wParam, lParam)); } else if (fdwProperty & IME_PROP_AT_CARET) { // EMPTY } else { return (DefWindowProc(hWnd, message, wParam, lParam)); } break; case WM_PAINT: HandlePaint(hWnd,wParam,lParam); break; case WM_IME_NOTIFY: { LRESULT lRet; // Normally, we should not call into HandleNotify // for IME_PROP_SPECIAL_UI and not IME_PROP_AT_CARET IMEs // we should pass this message to DefWindowProc directly for // this kind of IMEs lRet = HandleNotify(hWnd, message, wParam, lParam); // pass this message to DefWindowProc for IME_PROP_SPECIAL_UI // and not IME_PROP_AT_CARET IMEs if (fdwProperty & IME_PROP_SPECIAL_UI) { return (DefWindowProc(hWnd, message, wParam, lParam)); } else if (fdwProperty & IME_PROP_AT_CARET) { // EMPTY } else { return (DefWindowProc(hWnd, message, wParam, lParam)); } return lRet; } case WM_DESTROY: hOldIMC = (HIMC)GetWindowLongPtr(hWnd, 0); hIMC = ImmAssociateContext(hWnd, hOldIMC); ImmDestroyContext(hIMC); break; case WM_INPUTLANGCHANGE: fdwProperty = ImmGetProperty(GetKeyboardLayout(0), IGP_PROPERTY); if (hIMC = ImmGetContext(hWnd)) { CANDIDATEFORM cdf = {0}; if (fdwProperty & IME_PROP_AT_CARET) { cdf.dwIndex = 0; cdf.dwStyle = CFS_CANDIDATEPOS; cdf.ptCurrentPos.x = ptImeUIPos.x; cdf.ptCurrentPos.y = ptImeUIPos.y; ImmSetCandidateWindow(hIMC, &cdf); } else { UINT i; // The candidate position should be decided by a near caret // IME. There are 4 candidate form in the input context for (i = 0; i < 4; i++) { if (!ImmGetCandidateWindow(hIMC, i, &cdf)) { continue; } if (cdf.dwStyle == CFS_DEFAULT) { continue; } cdf.dwStyle = CFS_DEFAULT; ImmSetCandidateWindow(hIMC, &cdf); } } ImmReleaseContext(hWnd, hIMC); } return (DefWindowProc(hWnd, message, wParam, lParam)); default: return (DefWindowProc(hWnd, message, wParam, lParam)); } return 0L; }