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gecko/widget/public/nsIWidget.h

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/* -*- 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 "nsPoint.h"
#include "prthread.h"
#include "nsEvent.h"
#include "nsCOMPtr.h"
#include "nsITheme.h"
#include "nsNativeWidget.h"
#include "nsWidgetInitData.h"
#include "nsTArray.h"
// forward declarations
class nsIAppShell;
class nsIToolkit;
class nsIFontMetrics;
class nsIRenderingContext;
class nsIDeviceContext;
struct nsFont;
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
#define NS_IWIDGET_IID \
{ 0x6bdb96ba, 0x1727, 0x40ae, \
{ 0x85, 0x55, 0x9c, 0x53, 0x4b, 0x95, 0x23, 0x98 } }
/*
* 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
#define NS_STYLE_WINDOW_SHADOW_MENU 2
#define NS_STYLE_WINDOW_SHADOW_TOOLTIP 3
#define NS_STYLE_WINDOW_SHADOW_SHEET 4
/**
* 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.
*
* 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.
*
* In practice at least one of aParent and aNativeParent will be null. If
* both are null the widget isn't parented (e.g. context menus or
* independent top level windows).
*
* @param aParent parent nsIWidget
* @param aNativeParent native parent widget
* @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,
nsNativeWidget aNativeParent,
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
*
* @return the top level widget
*/
virtual nsIWidget* GetTopLevelWidget() = 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;
/**
* This represents a command to set the bounds and clip region of
* a child widget.
*/
struct Configuration {
nsIWidget* mChild;
nsIntRect mBounds;
nsTArray<nsIntRect> mClipRegion;
};
/**
* Sets the clip region of each mChild (which must actually be a child
* of this widget) to the union of the pixel rects given in
* mClipRegion, all relative to the top-left of the child
* widget. Clip regions are not implemented on all platforms and only
* need to actually work for children that are plugins.
*
* Also sets the bounds of each child to mBounds.
*
* This will invalidate areas of the children that have changed, but
* does not need to invalidate any part of this widget.
*/
virtual nsresult ConfigureChildren(const nsTArray<Configuration>& aConfigurations) = 0;
/**
* Appends to aRects the rectangles constituting this widget's clip
* region. If this widget is not clipped, appends a single rectangle
* (0, 0, bounds.width, bounds.height).
*/
virtual void GetWindowClipRegion(nsTArray<nsIntRect>* aRects) = 0;
/**
* Set the shadow style of the window.
*
* Ignored on child widgets and on non-Mac platforms.
*/
NS_IMETHOD SetWindowShadowStyle(PRInt32 aStyle) = 0;
/*
* On Mac OS X, this method shows or hides the pill button in the titlebar
* that's used to collapse the toolbar.
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetShowsToolbarButton(PRBool aShow) = 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;
/**
* 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;
/**
* 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 a set of rectangles in this widget and (as simultaneously as
* possible) modify the specified child widgets.
*
* This will invalidate areas of the children that have changed, unless
* they have just moved by the scroll amount, but does not need to
* invalidate any part of this widget, except where the scroll
* operation fails to blit because part of the window is unavailable
* (e.g. partially offscreen).
*
* The caller guarantees that the rectangles in aDestRects are
* non-intersecting.
*
* @param aDelta amount to scroll (device pixels)
* @param aDestRects rectangles to copy into
* (device pixels relative to this widget)
* @param aReconfigureChildren commands to set the bounds and clip
* region of a subset of the children of this widget; these should
* be performed simultaneously with the scrolling, as far as possible,
* to avoid visual artifacts.
*/
virtual void Scroll(const nsIntPoint& aDelta,
const nsTArray<nsIntRect>& aDestRects,
const nsTArray<Configuration>& aReconfigureChildren) = 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 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;
/**
* 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;
/**
* Ask whether there user input events pending. All input events are
* included, including those not targeted at this nsIwidget instance.
*/
virtual PRBool HasPendingInputEvent() = 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;
/**
* If set to true, the window will draw its contents into the titlebar
* instead of below it.
*
* Ignored on any platform that does not support it. Ignored by widgets that
* do not represent windows.
* May result in a resize event, so should only be called from places where
* reflow and painting is allowed.
*
* @param aState Whether drawing into the titlebar should be activated.
*/
virtual void SetDrawsInTitlebar(PRBool aState) = 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;
/**
* Utility method intended for testing. Dispatches native mouse events
* may even move the mouse cursor. On Mac the events are guaranteed to
* be sent to the window containing this widget, but on Windows they'll go
* to whatever's topmost on the screen at that position, so for
* cross-platform testing ensure that your window is at the top of the
* z-order.
* @param aPoint screen location of the mouse, in device
* pixels, with origin at the top left
* @param aNativeMessage *platform-specific* event type (e.g. on Mac,
* NSMouseMoved; on Windows, MOUSEEVENTF_MOVE, MOUSEEVENTF_LEFTDOWN etc)
* @param aModifierFlags *platform-specific* modifier flags (ignored
* on Windows)
*/
virtual nsresult SynthesizeNativeMouseEvent(nsIntPoint aPoint,
PRUint32 aNativeMessage,
PRUint32 aModifierFlags) = 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.
*
* WARNING: If you change these values, you also need to edit:
* nsIDOMWindowUtils.idl
* nsDOMWindowUtils::SetIMEEnabled
* nsContentUtils::GetWidgetStatusFromIMEStatus
*/
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)
*
* If this returns NS_ERROR_*, OnIMETextChange and OnIMESelectionChange
* and OnIMEFocusChange(PR_FALSE) will be never called.
*/
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;
/*
* Call this method when a dialog is opened which has a default button.
* The button's rectangle should be supplied in aButtonRect.
*/
NS_IMETHOD OnDefaultButtonLoaded(const nsIntRect &aButtonRect) = 0;
/**
* Compute the overridden system mouse scroll speed on the root content of
* web pages. The widget may set the same value as aOriginalDelta. E.g.,
* when the system scrolling settings were customized, widget can respect
* the will of the user.
*
* This is called only when the mouse wheel event scrolls the root content
* of the web pages by line. In other words, this isn't called when the
* mouse wheel event is used for zoom, page scroll and other special
* actions. And also this isn't called when the user doesn't use the
* system wheel speed settings.
*
* @param aOriginalDelta The delta value of the current mouse wheel
* scrolling event.
* @param aIsHorizontal If TRUE, the scrolling direction is horizontal.
* Otherwise, it's vertical.
* @param aOverriddenDelta The overridden mouse scrolling speed. This value
* may be same as aOriginalDelta.
*/
NS_IMETHOD OverrideSystemMouseScrollSpeed(PRInt32 aOriginalDelta,
PRBool aIsHorizontal,
PRInt32 &aOverriddenDelta) = 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<nsIWidget> mFirstChild;
nsIWidget* mLastChild;
nsCOMPtr<nsIWidget> mNextSibling;
nsIWidget* mPrevSibling;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIWidget, NS_IWIDGET_IID)
#endif // nsIWidget_h__
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