/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef nsIWidget_h__ #define nsIWidget_h__ #include "nsISupports.h" #include "nsColor.h" #include "nsCoord.h" #include "nsRect.h" #include "prthread.h" #include "nsEvent.h" #include "nsCOMPtr.h" #include "nsITheme.h" #include "nsNativeWidget.h" #include "nsWidgetInitData.h" // forward declarations class nsIAppShell; class nsIToolkit; class nsIFontMetrics; class nsIRenderingContext; class nsIDeviceContext; struct nsFont; class nsIEventListener; class nsIRollupListener; class nsGUIEvent; class imgIContainer; class gfxASurface; class nsIContent; /** * Callback function that processes events. * * The argument is actually a subtype (subclass) of nsEvent which carries * platform specific information about the event. Platform specific code * knows how to deal with it. * * The return value determines whether or not the default action should take * place. */ typedef nsEventStatus (* EVENT_CALLBACK)(nsGUIEvent *event); /** * Flags for the getNativeData function. * See getNativeData() */ #define NS_NATIVE_WINDOW 0 #define NS_NATIVE_GRAPHIC 1 #define NS_NATIVE_WIDGET 3 #define NS_NATIVE_DISPLAY 4 #define NS_NATIVE_REGION 5 #define NS_NATIVE_OFFSETX 6 #define NS_NATIVE_OFFSETY 7 #define NS_NATIVE_PLUGIN_PORT 8 #define NS_NATIVE_SCREEN 9 #define NS_NATIVE_SHELLWIDGET 10 // Get the shell GtkWidget #ifdef XP_MACOSX #define NS_NATIVE_PLUGIN_PORT_QD 100 #define NS_NATIVE_PLUGIN_PORT_CG 101 #endif #ifdef XP_WIN #define NS_NATIVE_TSF_THREAD_MGR 100 #define NS_NATIVE_TSF_CATEGORY_MGR 101 #define NS_NATIVE_TSF_DISPLAY_ATTR_MGR 102 #endif // af70b716-2e34-463f-8f1c-273dbddd845b #define NS_IWIDGET_IID \ { 0xaf70b716, 0x2e34, 0x463f, \ { 0x8f, 0x1c, 0x27, 0x3d, 0xbd, 0xdd, 0x84, 0x5b } } /* * Window shadow styles * Also used for the -moz-window-shadow CSS property */ #define NS_STYLE_WINDOW_SHADOW_NONE 0 #define NS_STYLE_WINDOW_SHADOW_DEFAULT 1 /** * Cursor types. */ enum nsCursor { ///(normal cursor, usually rendered as an arrow) eCursor_standard, ///(system is busy, usually rendered as a hourglass or watch) eCursor_wait, ///(Selecting something, usually rendered as an IBeam) eCursor_select, ///(can hyper-link, usually rendered as a human hand) eCursor_hyperlink, ///(north/south/west/east edge sizing) eCursor_n_resize, eCursor_s_resize, eCursor_w_resize, eCursor_e_resize, ///(corner sizing) eCursor_nw_resize, eCursor_se_resize, eCursor_ne_resize, eCursor_sw_resize, eCursor_crosshair, eCursor_move, eCursor_help, eCursor_copy, // CSS3 eCursor_alias, eCursor_context_menu, eCursor_cell, eCursor_grab, eCursor_grabbing, eCursor_spinning, eCursor_zoom_in, eCursor_zoom_out, eCursor_not_allowed, eCursor_col_resize, eCursor_row_resize, eCursor_no_drop, eCursor_vertical_text, eCursor_all_scroll, eCursor_nesw_resize, eCursor_nwse_resize, eCursor_ns_resize, eCursor_ew_resize, eCursor_none, // This one better be the last one in this list. eCursorCount }; enum nsTopLevelWidgetZPlacement { // for PlaceBehind() eZPlacementBottom = 0, // bottom of the window stack eZPlacementBelow, // just below another widget eZPlacementTop // top of the window stack }; /** * The base class for all the widgets. It provides the interface for * all basic and necessary functionality. */ class nsIWidget : public nsISupports { public: NS_DECLARE_STATIC_IID_ACCESSOR(NS_IWIDGET_IID) nsIWidget() : mLastChild(nsnull) , mPrevSibling(nsnull) {} /** * Create and initialize a widget. * * The widget represents a window that can be drawn into. It also is the * base class for user-interface widgets such as buttons and text boxes. * * All the arguments can be NULL in which case a top level window * with size 0 is created. The event callback function has to be * provided only if the caller wants to deal with the events this * widget receives. The event callback is basically a preprocess * hook called synchronously. The return value determines whether * the event goes to the default window procedure or it is hidden * to the os. The assumption is that if the event handler returns * false the widget does not see the event. The widget should not * automatically clear the window to the background color. The * calling code must handle paint messages and clear the background * itself. * * aInitData cannot be eWindowType_popup here; popups cannot be * hooked into the nsIWidget hierarchy. * * @param parent or null if it's a top level window * @param aRect the widget dimension * @param aHandleEventFunction the event handler callback function * @param aContext * @param aAppShell the parent application shell. If nsnull, * the parent window's application shell will be used. * @param aToolkit * @param aInitData data that is used for widget initialization * */ NS_IMETHOD Create(nsIWidget *aParent, const nsIntRect &aRect, EVENT_CALLBACK aHandleEventFunction, nsIDeviceContext *aContext, nsIAppShell *aAppShell = nsnull, nsIToolkit *aToolkit = nsnull, nsWidgetInitData *aInitData = nsnull) = 0; /** * Create and initialize a widget with a native window parent * * The widget represents a window that can be drawn into. It also is the * base class for user-interface widgets such as buttons and text boxes. * * All the arguments can be NULL in which case a top level window * with size 0 is created. The event callback function has to be * provided only if the caller wants to deal with the events this * widget receives. The event callback is basically a preprocess * hook called synchronously. The return value determines whether * the event goes to the default window procedure or it is hidden * to the os. The assumption is that if the event handler returns * false the widget does not see the event. * * @param aParent native window. * @param aRect the widget dimension * @param aHandleEventFunction the event handler callback function */ NS_IMETHOD Create(nsNativeWidget aParent, const nsIntRect &aRect, EVENT_CALLBACK aHandleEventFunction, nsIDeviceContext *aContext, nsIAppShell *aAppShell = nsnull, nsIToolkit *aToolkit = nsnull, nsWidgetInitData *aInitData = nsnull) = 0; /** * Accessor functions to get and set the client data associated with the * widget. */ //@{ NS_IMETHOD GetClientData(void*& aClientData) = 0; NS_IMETHOD SetClientData(void* aClientData) = 0; //@} /** * Close and destroy the internal native window. * This method does not delete the widget. */ NS_IMETHOD Destroy(void) = 0; /** * Reparent a widget * * Change the widgets parent * * @param aNewParent new parent */ NS_IMETHOD SetParent(nsIWidget* aNewParent) = 0; /** * Return the parent Widget of this Widget or nsnull if this is a * top level window * * @return the parent widget or nsnull if it does not have a parent * */ virtual nsIWidget* GetParent(void) = 0; /** * Return the top level Widget of this Widget * * @param aLevelsUp returns the number of GetParent() calls that * were necessary to get to the top level widget * @return the top level widget */ virtual nsIWidget* GetTopLevelWidget(PRInt32* aLevelsUp = NULL) = 0; /** * Return the top (non-sheet) parent of this Widget if it's a sheet, * or nsnull if this isn't a sheet (or some other error occurred). * Sheets are only supported on some platforms (currently only OS X). * * @return the top (non-sheet) parent widget or nsnull * */ virtual nsIWidget* GetSheetWindowParent(void) = 0; /** * Return the first child of this widget. Will return null if * there are no children. */ nsIWidget* GetFirstChild() const { return mFirstChild; } /** * Return the last child of this widget. Will return null if * there are no children. */ nsIWidget* GetLastChild() const { return mLastChild; } /** * Return the next sibling of this widget */ nsIWidget* GetNextSibling() const { return mNextSibling; } /** * Set the next sibling of this widget */ void SetNextSibling(nsIWidget* aSibling) { mNextSibling = aSibling; } /** * Return the previous sibling of this widget */ nsIWidget* GetPrevSibling() const { return mPrevSibling; } /** * Set the previous sibling of this widget */ void SetPrevSibling(nsIWidget* aSibling) { mPrevSibling = aSibling; } /** * Show or hide this widget * * @param aState PR_TRUE to show the Widget, PR_FALSE to hide it * */ NS_IMETHOD Show(PRBool aState) = 0; /** * Make the window modal * */ NS_IMETHOD SetModal(PRBool aModal) = 0; /** * Returns whether the window is visible * */ NS_IMETHOD IsVisible(PRBool & aState) = 0; /** * Perform platform-dependent sanity check on a potential window position. * This is guaranteed to work only for top-level windows. * * @param aAllowSlop: if true, allow the window to slop offscreen; * the window should be partially visible. if false, * force the entire window onscreen (or at least * the upper-left corner, if it's too large). * @param aX in: an x position expressed in screen coordinates. * out: the x position constrained to fit on the screen(s). * @param aY in: an y position expressed in screen coordinates. * out: the y position constrained to fit on the screen(s). * @return vapid success indication. but see also the parameters. * **/ NS_IMETHOD ConstrainPosition(PRBool aAllowSlop, PRInt32 *aX, PRInt32 *aY) = 0; /** * Move this widget. * * @param aX the new x position expressed in the parent's coordinate system * @param aY the new y position expressed in the parent's coordinate system * **/ NS_IMETHOD Move(PRInt32 aX, PRInt32 aY) = 0; /** * Resize this widget. * * @param aWidth the new width expressed in the parent's coordinate system * @param aHeight the new height expressed in the parent's coordinate system * @param aRepaint whether the widget should be repainted * */ NS_IMETHOD Resize(PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint) = 0; /** * Move or resize this widget. * * @param aX the new x position expressed in the parent's coordinate system * @param aY the new y position expressed in the parent's coordinate system * @param aWidth the new width expressed in the parent's coordinate system * @param aHeight the new height expressed in the parent's coordinate system * @param aRepaint whether the widget should be repainted if the size changes * */ NS_IMETHOD Resize(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint) = 0; /** * Sets the widget's z-index. */ NS_IMETHOD SetZIndex(PRInt32 aZIndex) = 0; /** * Gets the widget's z-index. */ NS_IMETHOD GetZIndex(PRInt32* aZIndex) = 0; /** * Position this widget just behind the given widget. (Used to * control z-order for top-level widgets. Get/SetZIndex by contrast * control z-order for child widgets of other widgets.) * @param aPlacement top, bottom, or below a widget * (if top or bottom, param aWidget is ignored) * @param aWidget widget to place this widget behind * (only if aPlacement is eZPlacementBelow). * null is equivalent to aPlacement of eZPlacementTop * @param aActivate true to activate the widget after placing it */ NS_IMETHOD PlaceBehind(nsTopLevelWidgetZPlacement aPlacement, nsIWidget *aWidget, PRBool aActivate) = 0; /** * Minimize, maximize or normalize the window size. * Takes a value from nsSizeMode (see nsGUIEvent.h) */ NS_IMETHOD SetSizeMode(PRInt32 aMode) = 0; /** * Return size mode (minimized, maximized, normalized). * Returns a value from nsSizeMode (see nsGUIEvent.h) */ NS_IMETHOD GetSizeMode(PRInt32* aMode) = 0; /** * Enable or disable this Widget * * @param aState PR_TRUE to enable the Widget, PR_FALSE to disable it. * */ NS_IMETHOD Enable(PRBool aState) = 0; /** * Ask whether the widget is enabled * @param aState returns PR_TRUE if the widget is enabled */ NS_IMETHOD IsEnabled(PRBool *aState) = 0; /** * Give focus to this widget. */ NS_IMETHOD SetFocus(PRBool aRaise = PR_FALSE) = 0; /** * Get this widget's outside dimensions relative to its parent widget * * @param aRect on return it holds the x, y, width and height of this widget * */ NS_IMETHOD GetBounds(nsIntRect &aRect) = 0; /** * Get this widget's outside dimensions in global coordinates. (One might think this * could be accomplished by stringing together other methods in this interface, but * then one would bloody one's nose on different coordinate system handling by different * platforms.) This includes any title bar on the window. * * * @param aRect on return it holds the x, y, width and height of this widget * */ NS_IMETHOD GetScreenBounds(nsIntRect &aRect) = 0; /** * Get this widget's client area dimensions, if the window has a 3D border appearance * this returns the area inside the border, The x and y are always zero * * @param aRect on return it holds the x. y, width and height of the client area of this widget * */ NS_IMETHOD GetClientBounds(nsIntRect &aRect) = 0; /** * Get the foreground color for this widget * * @return this widget's foreground color * */ virtual nscolor GetForegroundColor(void) = 0; /** * Set the foreground color for this widget * * @param aColor the new foreground color * */ NS_IMETHOD SetForegroundColor(const nscolor &aColor) = 0; /** * Get the background color for this widget * * @return this widget's background color * */ virtual nscolor GetBackgroundColor(void) = 0; /** * Set the background color for this widget * * @param aColor the new background color * */ NS_IMETHOD SetBackgroundColor(const nscolor &aColor) = 0; /** * Get the cursor for this widget. * * @return this widget's cursor. */ virtual nsCursor GetCursor(void) = 0; /** * Set the cursor for this widget * * @param aCursor the new cursor for this widget */ NS_IMETHOD SetCursor(nsCursor aCursor) = 0; /** * Sets an image as the cursor for this widget. * * @param aCursor the cursor to set * @param aX the X coordinate of the hotspot (from left). * @param aY the Y coordinate of the hotspot (from top). * @retval NS_ERROR_NOT_IMPLEMENTED if setting images as cursors is not * supported */ NS_IMETHOD SetCursor(imgIContainer* aCursor, PRUint32 aHotspotX, PRUint32 aHotspotY) = 0; /** * Get the window type of this widget * * @param aWindowType the window type of the widget */ NS_IMETHOD GetWindowType(nsWindowType& aWindowType) = 0; /** * Set the transparency mode of the top-level window containing this widget. * So, e.g., if you call this on the widget for an IFRAME, the top level * browser window containing the IFRAME actually gets set. Be careful. * * This can fail if the platform doesn't support * transparency/glass. By default widgets are not * transparent. This will also fail if the toplevel window is not * a Mozilla window, e.g., if the widget is in an embedded * context. * * After transparency/glass has been enabled, the initial alpha channel * value for all pixels is 1, i.e., opaque. * If the window is resized then the alpha channel values for * all pixels are reset to 1. * Pixel RGB color values are already premultiplied with alpha channel values. */ virtual void SetTransparencyMode(nsTransparencyMode aMode) = 0; /** * Get the transparency mode of the top-level window that contains this * widget. */ virtual nsTransparencyMode GetTransparencyMode() = 0; /** * Set the shadow style of the window. */ NS_IMETHOD SetWindowShadowStyle(PRInt32 aStyle) = 0; /** * Hide window chrome (borders, buttons) for this widget. * */ NS_IMETHOD HideWindowChrome(PRBool aShouldHide) = 0; /** * Put the toplevel window into or out of fullscreen mode. * */ NS_IMETHOD MakeFullScreen(PRBool aFullScreen) = 0; /** * Validate the widget. * */ NS_IMETHOD Validate() = 0; /** * Invalidate the widget and repaint it. * * @param aIsSynchronous PR_TRUE then repaint synchronously. If PR_FALSE repaint later. * @see #Update() */ NS_IMETHOD Invalidate(PRBool aIsSynchronous) = 0; /** * Invalidate a specified rect for a widget and repaints it. * * @param aIsSynchronouse PR_TRUE then repaint synchronously. If PR_FALSE repaint later. * @see #Update() */ NS_IMETHOD Invalidate(const nsIntRect & aRect, PRBool aIsSynchronous) = 0; /** * Force a synchronous repaint of the window if there are dirty rects. * * @see Invalidate() */ NS_IMETHOD Update() = 0; /** * Adds an event listener to this widget * Any existing event listener is replaced * * @param aListener event listener to add to this widget. */ NS_IMETHOD AddEventListener(nsIEventListener * aListener) = 0; /** * Return the widget's toolkit * * An AddRef has NOT been done for the caller. * * @return the toolkit this widget was created in. See nsToolkit. */ virtual nsIToolkit* GetToolkit() = 0; /** * Scroll this widget. * * @param aDx amount to scroll along the x-axis * @param aDy amount to scroll along the y-axis. * @param aClipRect clipping rectangle to limit the scroll to. * */ NS_IMETHOD Scroll(PRInt32 aDx, PRInt32 aDy, nsIntRect *aClipRect) = 0; /** * Internal methods */ //@{ virtual void AddChild(nsIWidget* aChild) = 0; virtual void RemoveChild(nsIWidget* aChild) = 0; virtual void* GetNativeData(PRUint32 aDataType) = 0; virtual void FreeNativeData(void * data, PRUint32 aDataType) = 0;//~~~ virtual nsIRenderingContext* GetRenderingContext() = 0; // GetDeviceContext returns a weak pointer to this widget's device context virtual nsIDeviceContext* GetDeviceContext() = 0; //@} /** * Set border style * Must be called before Create. * @param aBorderStyle @see nsBorderStyle */ NS_IMETHOD SetBorderStyle(nsBorderStyle aBorderStyle) = 0; /** * Set the widget's title. * Must be called after Create. * * @param aTitle string displayed as the title of the widget */ NS_IMETHOD SetTitle(const nsAString& aTitle) = 0; /** * Set the widget's icon. * Must be called after Create. * * @param anIconSpec string specifying the icon to use; convention is to pass * a resource: URL from which a platform-dependent resource * file name will be constructed */ NS_IMETHOD SetIcon(const nsAString& anIconSpec) = 0; /** * Return this widget's origin in screen coordinates. * * @return screen coordinates stored in the x,y members */ virtual nsIntPoint WidgetToScreenOffset() = 0; /** * When adjustments are to made to a whole set of child widgets, call this * before resizing/positioning the child windows to minimize repaints. Must * be followed by EndResizingChildren() after child windows have been * adjusted. * */ NS_IMETHOD BeginResizingChildren(void) = 0; /** * Call this when finished adjusting child windows. Must be preceded by * BeginResizingChildren(). * */ NS_IMETHOD EndResizingChildren(void) = 0; /** * Dispatches an event to the widget * */ NS_IMETHOD DispatchEvent(nsGUIEvent* event, nsEventStatus & aStatus) = 0; /** * Enables the dropping of files to a widget (XXX this is temporary) * */ NS_IMETHOD EnableDragDrop(PRBool aEnable) = 0; /** * Enables/Disables system mouse capture. * @param aCapture PR_TRUE enables mouse capture, PR_FALSE disables mouse capture * */ NS_IMETHOD CaptureMouse(PRBool aCapture) = 0; /** * Classify the window for the window manager. Mostly for X11. */ NS_IMETHOD SetWindowClass(const nsAString& xulWinType) = 0; /** * Enables/Disables system capture of any and all events that would cause a * dropdown to be rolled up, This method ignores the aConsumeRollupEvent * parameter when aDoCapture is FALSE * @param aDoCapture PR_TRUE enables capture, PR_FALSE disables capture * @param aConsumeRollupEvent PR_TRUE consumes the rollup event, PR_FALSE dispatches rollup event * */ NS_IMETHOD CaptureRollupEvents(nsIRollupListener * aListener, PRBool aDoCapture, PRBool aConsumeRollupEvent) = 0; /** * Bring this window to the user's attention. This is intended to be a more * gentle notification than popping the window to the top or putting up an * alert. See, for example, Win32 FlashWindow or the NotificationManager on * the Mac. The notification should be suppressed if the window is already * in the foreground and should be dismissed when the user brings this window * to the foreground. * @param aCycleCount Maximum number of times to animate the window per system * conventions. If set to -1, cycles indefinitely until * window is brought into the foreground. */ NS_IMETHOD GetAttention(PRInt32 aCycleCount) = 0; /** * Get the last user input event time in milliseconds. If there are any pending * native toolkit input events it returns the current time. All input events are * included (ie. it is *not* limited to events targeted at this nsIWidget instance. * * @param aTime Last user input time in milliseconds. This value can be used to compare * durations but can not be used for determining wall clock time. The value returned * is platform dependent, but is compatible with the expression * PR_IntervalToMicroseconds(PR_IntervalNow()). */ NS_IMETHOD GetLastInputEventTime(PRUint32& aTime) = 0; /** * Called when when we need to begin secure keyboard input, such as when a password field * gets focus. * * NOTE: Calls to this method may not be nested and you can only enable secure keyboard input * for one widget at a time. */ NS_IMETHOD BeginSecureKeyboardInput() = 0; /** * Called when when we need to end secure keyboard input, such as when a password field * loses focus. * * NOTE: Calls to this method may not be nested and you can only enable secure keyboard input * for one widget at a time. */ NS_IMETHOD EndSecureKeyboardInput() = 0; /** * Set the background color of the window titlebar for this widget. On Mac, * for example, this will remove the grey gradient and bottom border and * instead show a single, solid color. * * Ignored on any platform that does not support it. Ignored by widgets that * do not represent windows. * * @param aColor The color to set the title bar background to. Alpha values * other than fully transparent (0) are respected if possible * on the platform. An alpha of 0 will cause the window to * draw with the default style for the platform. * * @param aActive Whether the color should be applied to active or inactive * windows. */ NS_IMETHOD SetWindowTitlebarColor(nscolor aColor, PRBool aActive) = 0; /* * Determine whether the widget shows a resize widget. If it does, * aResizerRect returns the resizer's rect. * * Returns false on any platform that does not support it. * * @param aResizerRect The resizer's rect in device pixels. * @return Whether a resize widget is shown. */ virtual PRBool ShowsResizeIndicator(nsIntRect* aResizerRect) = 0; /** * Get the Thebes surface associated with this widget. */ virtual gfxASurface *GetThebesSurface() = 0; /** * Return the popup that was last rolled up, or null if there isn't one. */ virtual nsIContent* GetLastRollup() = 0; /** * Begin a window resizing drag, based on the event passed in. */ NS_IMETHOD BeginResizeDrag(nsGUIEvent* aEvent, PRInt32 aHorizontal, PRInt32 aVertical) = 0; enum Modifiers { CAPS_LOCK = 0x01, // when CapsLock is active NUM_LOCK = 0x02, // when NumLock is active SHIFT_L = 0x0100, SHIFT_R = 0x0200, CTRL_L = 0x0400, CTRL_R = 0x0800, ALT_L = 0x1000, // includes Option ALT_R = 0x2000, COMMAND_L = 0x4000, COMMAND_R = 0x8000, HELP = 0x10000, FUNCTION = 0x100000, NUMERIC_KEY_PAD = 0x01000000 // when the key is coming from the keypad }; /** * Utility method intended for testing. Dispatches native key events * to this widget to simulate the press and release of a key. * @param aNativeKeyboardLayout a *platform-specific* constant. * On Mac, this is the resource ID for a 'uchr' or 'kchr' resource. * On Windows, it is converted to a hex string and passed to * LoadKeyboardLayout, see * http://msdn.microsoft.com/en-us/library/ms646305(VS.85).aspx * @param aNativeKeyCode a *platform-specific* keycode. * On Windows, this is the virtual key code. * @param aModifiers some combination of the above 'Modifiers' flags; * not all flags will apply to all platforms. Mac ignores the _R * modifiers. Windows ignores COMMAND, NUMERIC_KEY_PAD, HELP and * FUNCTION. * @param aCharacters characters that the OS would decide to generate * from the event. On Windows, this is the charCode passed by * WM_CHAR. * @param aUnmodifiedCharacters characters that the OS would decide * to generate from the event if modifier keys (other than shift) * were assumed inactive. Needed on Mac, ignored on Windows. * @return NS_ERROR_NOT_AVAILABLE to indicate that the keyboard * layout is not supported and the event was not fired */ virtual nsresult SynthesizeNativeKeyEvent(PRInt32 aNativeKeyboardLayout, PRInt32 aNativeKeyCode, PRUint32 aModifierFlags, const nsAString& aCharacters, const nsAString& aUnmodifiedCharacters) = 0; /** * Activates a native menu item at the position specified by the index * string. The index string is a string of positive integers separated * by the "|" (pipe) character. The last integer in the string represents * the item index in a submenu located using the integers preceeding it. * * Example: 1|0|4 * In this string, the first integer represents the top-level submenu * in the native menu bar. Since the integer is 1, it is the second submeu * in the native menu bar. Within that, the first item (index 0) is a * submenu, and we want to activate the 5th item within that submenu. */ virtual nsresult ActivateNativeMenuItemAt(const nsAString& indexString) = 0; /** * This is used for native menu system testing. * * Updates a native menu at the position specified by the index string. * The index string is a string of positive integers separated by the "|" * (pipe) character. * * Example: 1|0|4 * In this string, the first integer represents the top-level submenu * in the native menu bar. Since the integer is 1, it is the second submeu * in the native menu bar. Within that, the first item (index 0) is a * submenu, and we want to update submenu at index 4 within that submenu. * * If this is called with an empty string it forces a full reload of the * menu system. */ virtual nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) = 0; /* * Force Input Method Editor to commit the uncommitted input */ NS_IMETHOD ResetInputState()=0; /* * Following methods relates to IME 'Opened'/'Closed' state. * 'Opened' means the user can input any character. I.e., users can input Japanese * and other characters. The user can change the state to 'Closed'. * 'Closed' means the user can input ASCII characters only. This is the same as a * non-IME environment. The user can change the state to 'Opened'. * For more information is here. * http://bugzilla.mozilla.org/show_bug.cgi?id=16940#c48 */ /* * Set the state to 'Opened' or 'Closed'. * If aState is TRUE, IME open state is set to 'Opened'. * If aState is FALSE, set to 'Closed'. */ NS_IMETHOD SetIMEOpenState(PRBool aState) = 0; /* * Get IME is 'Opened' or 'Closed'. * If IME is 'Opened', aState is set PR_TRUE. * If IME is 'Closed', aState is set PR_FALSE. */ NS_IMETHOD GetIMEOpenState(PRBool* aState) = 0; /* * IME enabled states, the aState value of SetIMEEnabled/GetIMEEnabled * should be one value of following values. */ enum IMEStatus { /* * 'Disabled' means the user cannot use IME. So, the open state should be * 'closed' during 'disabled'. */ IME_STATUS_DISABLED = 0, /* * 'Enabled' means the user can use IME. */ IME_STATUS_ENABLED = 1, /* * 'Password' state is a special case for the password editors. * E.g., on mac, the password editors should disable the non-Roman * keyboard layouts at getting focus. Thus, the password editor may have * special rules on some platforms. */ IME_STATUS_PASSWORD = 2, /* * This state is used when a plugin is focused. * When a plug-in is focused content, we should send native events * directly. Because we don't process some native events, but they may * be needed by the plug-in. */ IME_STATUS_PLUGIN = 3 }; /* * Set the state to 'Enabled' or 'Disabled' or 'Password'. */ NS_IMETHOD SetIMEEnabled(PRUint32 aState) = 0; /* * Get IME is 'Enabled' or 'Disabled' or 'Password'. */ NS_IMETHOD GetIMEEnabled(PRUint32* aState) = 0; /* * Destruct and don't commit the IME composition string. */ NS_IMETHOD CancelIMEComposition() = 0; /* * Get toggled key states. * aKeyCode should be NS_VK_CAPS_LOCK or NS_VK_NUM_LOCK or * NS_VK_SCROLL_LOCK. * aLEDState is the result for current LED state of the key. * If the LED is 'ON', it returns TRUE, otherwise, FALSE. * If the platform doesn't support the LED state (or we cannot get the * state), this method returns NS_ERROR_NOT_IMPLEMENTED. */ NS_IMETHOD GetToggledKeyState(PRUint32 aKeyCode, PRBool* aLEDState) = 0; /* * An editable node (i.e. input/textarea/design mode document) * is receiving or giving up focus * aFocus is true if node is receiving focus * aFocus is false if node is giving up focus (blur) */ NS_IMETHOD OnIMEFocusChange(PRBool aFocus) = 0; /* * Text content of the focused node has changed * aStart is the starting offset of the change * aOldEnd is the ending offset of the change * aNewEnd is the caret offset after the change */ NS_IMETHOD OnIMETextChange(PRUint32 aStart, PRUint32 aOldEnd, PRUint32 aNewEnd) = 0; /* * Selection has changed in the focused node */ NS_IMETHOD OnIMESelectionChange(void) = 0; protected: // keep the list of children. We also keep track of our siblings. // The ownership model is as follows: parent holds a strong ref to // the first element of the list, and each element holds a strong // ref to the next element in the list. The prevsibling and // lastchild pointers are weak, which is fine as long as they are // maintained properly. nsCOMPtr mFirstChild; nsIWidget* mLastChild; nsCOMPtr mNextSibling; nsIWidget* mPrevSibling; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIWidget, NS_IWIDGET_IID) #endif // nsIWidget_h__