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nsIWidget.h
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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 "nsRegion.h"
#include "nsStringGlue.h"
#include "prthread.h"
#include "Layers.h"
#include "nsEvent.h"
#include "nsCOMPtr.h"
#include "nsITheme.h"
#include "nsNativeWidget.h"
#include "nsWidgetInitData.h"
#include "nsTArray.h"
#include "nsXULAppAPI.h"
// forward declarations
class nsFontMetrics;
class nsRenderingContext;
class nsDeviceContext;
struct nsFont;
class nsIRollupListener;
class nsGUIEvent;
class imgIContainer;
class gfxASurface;
class nsIContent;
class ViewWrapper;
namespace mozilla {
namespace dom {
class PBrowserChild;
}
namespace layers {
class PLayersChild;
}
}
/**
* 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_TMP_WINDOW 2
#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
// Has to match to NPNVnetscapeWindow, and shareable across processes
// HWND on Windows and XID on X11
#define NS_NATIVE_SHAREABLE_WINDOW 11
#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 \
{ 0x7c7ff2ff, 0x61f9, 0x4240, \
{ 0xaa, 0x58, 0x74, 0xb0, 0xcd, 0xa9, 0xe3, 0x05 } }
/*
* 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
/**
* nsIWidget::OnIMEFocusChange should be called during blur,
* but other OnIME*Change methods should not be called
*/
#define NS_SUCCESS_IME_NO_UPDATES \
NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_WIDGET, 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
};
/**
* Preference for receiving IME updates
*
* If mWantUpdates is true, PuppetWidget will forward
* nsIWidget::OnIMETextChange and nsIWidget::OnIMESelectionChange to the chrome
* process. This incurs overhead from observers and IPDL. If the IME
* implementation on a particular platform doesn't care about OnIMETextChange
* and OnIMESelectionChange from content processes, they should set
* mWantUpdates to false to avoid these overheads.
*
* If mWantHints is true, PuppetWidget will forward the content of text fields
* to the chrome process to be cached. This way we return the cached content
* during query events. (see comments in bug 583976). This only makes sense
* for IME implementations that do use query events, otherwise there's a
* significant overhead. Platforms that don't use query events should set
* mWantHints to false.
*/
struct nsIMEUpdatePreference {
nsIMEUpdatePreference()
: mWantUpdates(false), mWantHints(false)
{
}
nsIMEUpdatePreference(bool aWantUpdates, bool aWantHints)
: mWantUpdates(aWantUpdates), mWantHints(aWantHints)
{
}
bool mWantUpdates;
bool mWantHints;
};
/*
* Contains IMEStatus plus information about the current
* input context that the IME can use as hints if desired.
*/
namespace mozilla {
namespace widget {
struct IMEState {
/**
* IME enabled states, the mEnabled value of
* SetInputContext()/GetInputContext() should be one value of following
* values.
*
* WARNING: If you change these values, you also need to edit:
* nsIDOMWindowUtils.idl
* nsContentUtils::GetWidgetStatusFromIMEStatus
*/
enum Enabled {
/**
* 'Disabled' means the user cannot use IME. So, the IME open state should
* be 'closed' during 'disabled'.
*/
DISABLED,
/**
* 'Enabled' means the user can use IME.
*/
ENABLED,
/**
* '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.
*/
PASSWORD,
/**
* 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.
*/
PLUGIN
};
Enabled mEnabled;
/**
* IME open states the mOpen value of SetInputContext() should be one value of
* OPEN, CLOSE or DONT_CHANGE_OPEN_STATE. GetInputContext() should return
* OPEN, CLOSE or OPEN_STATE_NOT_SUPPORTED.
*/
enum Open {
/**
* 'Unsupported' means the platform cannot return actual IME open state.
* This value is used only by GetInputContext().
*/
OPEN_STATE_NOT_SUPPORTED,
/**
* 'Don't change' means the widget shouldn't change IME open state when
* SetInputContext() is called.
*/
DONT_CHANGE_OPEN_STATE = OPEN_STATE_NOT_SUPPORTED,
/**
* 'Open' means that IME should compose in its primary language (or latest
* input mode except direct ASCII character input mode). Even if IME is
* opened by this value, users should be able to close IME by theirselves.
* Web contents can specify this value by |ime-mode: active;|.
*/
OPEN,
/**
* 'Closed' means that IME shouldn't handle key events (or should handle
* as ASCII character inputs on mobile device). Even if IME is closed by
* this value, users should be able to open IME by theirselves.
* Web contents can specify this value by |ime-mode: inactive;|.
*/
CLOSED
};
Open mOpen;
IMEState() : mEnabled(ENABLED), mOpen(DONT_CHANGE_OPEN_STATE) { }
IMEState(Enabled aEnabled, Open aOpen = DONT_CHANGE_OPEN_STATE) :
mEnabled(aEnabled), mOpen(aOpen)
{
}
};
struct InputContext {
IMEState mIMEState;
/* The type of the input if the input is a html input field */
nsString mHTMLInputType;
/* A hint for the action that is performed when the input is submitted */
nsString mActionHint;
};
struct InputContextAction {
/**
* mCause indicates what action causes calling nsIWidget::SetInputContext().
* It must be one of following values.
*/
enum Cause {
// The cause is unknown but originated from content. Focus might have been
// changed by content script.
CAUSE_UNKNOWN,
// The cause is unknown but originated from chrome. Focus might have been
// changed by chrome script.
CAUSE_UNKNOWN_CHROME,
// The cause is user's keyboard operation.
CAUSE_KEY,
// The cause is user's mouse operation.
CAUSE_MOUSE
};
Cause mCause;
/**
* mFocusChange indicates what happened for focus.
*/
enum FocusChange {
FOCUS_NOT_CHANGED,
// A content got focus.
GOT_FOCUS,
// Focused content lost focus.
LOST_FOCUS,
// Menu got pseudo focus that means focused content isn't changed but
// keyboard events will be handled by menu.
MENU_GOT_PSEUDO_FOCUS,
// Menu lost pseudo focus that means focused content will handle keyboard
// events.
MENU_LOST_PSEUDO_FOCUS
};
FocusChange mFocusChange;
bool ContentGotFocusByTrustedCause() const {
return (mFocusChange == GOT_FOCUS &&
mCause != CAUSE_UNKNOWN);
}
bool UserMightRequestOpenVKB() const {
return (mFocusChange == FOCUS_NOT_CHANGED &&
mCause == CAUSE_MOUSE);
}
InputContextAction() :
mCause(CAUSE_UNKNOWN), mFocusChange(FOCUS_NOT_CHANGED)
{
}
InputContextAction(Cause aCause,
FocusChange aFocusChange = FOCUS_NOT_CHANGED) :
mCause(aCause), mFocusChange(aFocusChange)
{
}
};
} // namespace widget
} // namespace mozilla
/**
* The base class for all the widgets. It provides the interface for
* all basic and necessary functionality.
*/
class nsIWidget : public nsISupports {
protected:
typedef mozilla::dom::PBrowserChild PBrowserChild;
public:
typedef mozilla::layers::LayerManager LayerManager;
typedef LayerManager::LayersBackend LayersBackend;
typedef mozilla::layers::PLayersChild PLayersChild;
typedef mozilla::widget::IMEState IMEState;
typedef mozilla::widget::InputContext InputContext;
typedef mozilla::widget::InputContextAction InputContextAction;
// Used in UpdateThemeGeometries.
struct ThemeGeometry {
// The -moz-appearance value for the themed widget
PRUint8 mWidgetType;
// The device-pixel rect within the window for the themed widget
nsIntRect mRect;
ThemeGeometry(PRUint8 aWidgetType, const nsIntRect& aRect)
: mWidgetType(aWidgetType)
, mRect(aRect)
{ }
};
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 aInitData data that is used for widget initialization
*
*/
NS_IMETHOD Create(nsIWidget *aParent,
nsNativeWidget aNativeParent,
const nsIntRect &aRect,
EVENT_CALLBACK aHandleEventFunction,
nsDeviceContext *aContext,
nsWidgetInitData *aInitData = nsnull) = 0;
/**
* Allocate, initialize, and return a widget that is a child of
* |this|. The returned widget (if nonnull) has gone through the
* equivalent of CreateInstance(widgetCID) + Create(...).
*
* |CreateChild()| lets widget backends decide whether to parent
* the new child widget to this, nonnatively parent it, or both.
* This interface exists to support the PuppetWidget backend,
* which is entirely non-native. All other params are the same as
* for |Create()|.
*
* |aForceUseIWidgetParent| forces |CreateChild()| to only use the
* |nsIWidget*| this, not its native widget (if it exists), when
* calling |Create()|. This is a timid hack around poorly
* understood code, and shouldn't be used in new code.
*/
virtual already_AddRefed<nsIWidget>
CreateChild(const nsIntRect &aRect,
EVENT_CALLBACK aHandleEventFunction,
nsDeviceContext *aContext,
nsWidgetInitData *aInitData = nsnull,
bool aForceUseIWidgetParent = false) = 0;
/**
* Set the event callback for a widget. If a device context is not
* provided then the existing device context will remain, it will
* not be nulled out.
*/
NS_IMETHOD SetEventCallback(EVENT_CALLBACK aEventFunction,
nsDeviceContext *aContext) = 0;
/**
* Attach to a top level widget.
*
* In cases where a top level chrome widget is being used as a content
* container, attach a secondary event callback and update the device
* context. The primary event callback will continue to be called, so the
* owning base window will continue to function.
*
* aViewEventFunction Event callback that will receive mirrored
* events.
* aContext The new device context for the view
*/
NS_IMETHOD AttachViewToTopLevel(EVENT_CALLBACK aViewEventFunction,
nsDeviceContext *aContext) = 0;
/**
* Accessor functions to get and set secondary client data. Used by
* nsIView in connection with AttachViewToTopLevel above.
*/
NS_IMETHOD SetAttachedViewPtr(ViewWrapper* aViewWrapper) = 0;
virtual ViewWrapper* GetAttachedViewPtr() = 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 widget's parent. Null parents are allowed.
*
* @param aNewParent new parent
*/
NS_IMETHOD SetParent(nsIWidget* aNewParent) = 0;
NS_IMETHOD RegisterTouchWindow() = 0;
NS_IMETHOD UnregisterTouchWindow() = 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 physical DPI of the screen containing the window ...
* the number of device pixels per inch.
*/
virtual float GetDPI() = 0;
/**
* Return the default scale factor for the window. This is the
* default number of device pixels per CSS pixel to use. This should
* depend on OS/platform settings such as the Mac's "UI scale factor"
* or Windows' "font DPI".
*/
virtual double GetDefaultScale() = 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 true to show the Widget, false to hide it
*
*/
NS_IMETHOD Show(bool aState) = 0;
/**
* Make the window modal
*
*/
NS_IMETHOD SetModal(bool aModal) = 0;
/**
* Returns whether the window is visible
*
*/
NS_IMETHOD IsVisible(bool & 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(bool aAllowSlop,
PRInt32 *aX,
PRInt32 *aY) = 0;
/**
* Move this widget.
*
* Coordinates refer to the top-left of the widget. For toplevel windows
* with decorations, this is the top-left of the titlebar and frame .
*
* @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;
/**
* Reposition this widget so that the client area has the given offset.
*
* @param aX the new x offset of the client area expressed as an
* offset from the origin of the client area of the parent
* widget (for root widgets and popup widgets it is in
* screen coordinates)
* @param aY the new y offset of the client area expressed as an
* offset from the origin of the client area of the parent
* widget (for root widgets and popup widgets it is in
* screen coordinates)
*
**/
NS_IMETHOD MoveClient(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,
bool 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,
bool aRepaint) = 0;
/**
* Resize the widget so that the inner client area has the given size.
*
* @param aWidth the new width of the client area.
* @param aHeight the new height of the client area.
* @param aRepaint whether the widget should be repainted
*
*/
NS_IMETHOD ResizeClient(PRInt32 aWidth,
PRInt32 aHeight,
bool aRepaint) = 0;
/**
* Resize and reposition the widget so tht inner client area has the given
* offset and size.
*
* @param aX the new x offset of the client area expressed as an
* offset from the origin of the client area of the parent
* widget (for root widgets and popup widgets it is in
* screen coordinates)
* @param aY the new y offset of the client area expressed as an
* offset from the origin of the client area of the parent
* widget (for root widgets and popup widgets it is in
* screen coordinates)
* @param aWidth the new width of the client area.
* @param aHeight the new height of the client area.
* @param aRepaint whether the widget should be repainted
*
*/
NS_IMETHOD ResizeClient(PRInt32 aX,
PRInt32 aY,
PRInt32 aWidth,
PRInt32 aHeight,
bool 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, bool 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 true to enable the Widget, false to disable it.
*
*/
NS_IMETHOD Enable(bool aState) = 0;
/**
* Ask whether the widget is enabled
* @param aState returns true if the widget is enabled
*/
NS_IMETHOD IsEnabled(bool *aState) = 0;
/**
* Request activation of this window or give focus to this widget.
*
* @param aRaise If true, this function requests activation of this
* widget's toplevel window.
* If false, the appropriate toplevel window (which in
* the case of popups may not be this widget's toplevel
* window) is already active, and this function indicates
* that keyboard events should be reported through the
* aHandleEventFunction provided to this->Create().
*/
NS_IMETHOD SetFocus(bool aRaise = false) = 0;
/**
* Get this widget's outside dimensions relative to its parent widget. For
* popup widgets the returned rect is in screen coordinates and not
* 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. 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 bounds, if the window has a 3D border
* appearance this returns the area inside the border. The position is the
* position of the client area relative to the client area of the parent
* widget (for root widgets and popup widgets it is in screen coordinates).
*
* @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 non-client area dimensions of the window.
*
*/
NS_IMETHOD GetNonClientMargins(nsIntMargin &margins) = 0;
/**
* Sets the non-client area dimensions of the window. Pass -1 to restore
* the system default frame size for that border. Pass zero to remove
* a border, or pass a specific value adjust a border. Units are in
* pixels. (DPI dependent)
*
* Platform notes:
* Windows: shrinking top non-client height will remove application
* icon and window title text. Glass desktops will refuse to set
* dimensions between zero and size < system default.
*
*/
NS_IMETHOD SetNonClientMargins(nsIntMargin &margins) = 0;
/**
* Get the client offset from the window origin.
*
* @return the x and y of the offset.
*
*/
virtual nsIntPoint GetClientOffset() = 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.
*
* Children should be moved in the order given; the array is
* sorted so to minimize unnecessary invalidation if children are
* moved in that order.
*/
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