/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsIWidget_h__ #define nsIWidget_h__ #include "nsISupports.h" #include "nsColor.h" #include "nsRect.h" #include "nsStringGlue.h" #include "nsCOMPtr.h" #include "nsWidgetInitData.h" #include "nsTArray.h" #include "nsXULAppAPI.h" #include "mozilla/EventForwards.h" #include "mozilla/layers/LayersTypes.h" #include "mozilla/RefPtr.h" #include "Units.h" // forward declarations class nsFontMetrics; class nsRenderingContext; class nsDeviceContext; struct nsFont; class nsIRollupListener; class imgIContainer; class gfxASurface; class nsIContent; class ViewWrapper; class nsIWidgetListener; class nsIntRegion; namespace mozilla { namespace dom { class TabChild; } namespace layers { class Composer2D; class CompositorChild; class LayerManager; class PLayerTransactionChild; } namespace gfx { class DrawTarget; } } /** * 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); // Hide the native window system's real window type so as to avoid // including native window system types and APIs. This is necessary // to ensure cross-platform code. typedef void* nsNativeWidget; /** * 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 // The toplevel GtkWidget containing this nsIWidget: #define NS_NATIVE_SHELLWIDGET 10 // 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 #define NS_NATIVE_ICOREWINDOW 103 // winrt specific #endif #define NS_IWIDGET_IID \ { 0x1ebdb596, 0x0f90, 0x4f02, \ { 0x97, 0x07, 0x4e, 0xc1, 0x16, 0xcd, 0x54, 0xf6 } } /* * 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 /** * Transparency modes */ enum nsTransparencyMode { eTransparencyOpaque = 0, // Fully opaque eTransparencyTransparent, // Parts of the window may be transparent eTransparencyGlass, // Transparent parts of the window have Vista AeroGlass effect applied eTransparencyBorderlessGlass // As above, but without a border around the opaque areas when there would otherwise be one with eTransparencyGlass }; /** * 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 }; /** * Before the OS goes to sleep, this topic is notified. */ #define NS_WIDGET_SLEEP_OBSERVER_TOPIC "sleep_notification" /** * After the OS wakes up, this topic is notified. */ #define NS_WIDGET_WAKE_OBSERVER_TOPIC "wake_notification" /** * Before the OS suspends the current process, this topic is notified. Some * OS will kill processes that are suspended instead of resuming them. * For that reason this topic may be useful to safely close down resources. */ #define NS_WIDGET_SUSPEND_PROCESS_OBSERVER_TOPIC "suspend_process_notification" /** * After the current process resumes from being suspended, this topic is * notified. */ #define NS_WIDGET_RESUME_PROCESS_OBSERVER_TOPIC "resume_process_notification" /** * Preference for receiving IME updates * * If mWantUpdates is not NOTIFY_NOTHING, nsTextStateManager will observe text * change and/or selection change and call nsIWidget::NotifyIMEOfTextChange() * and/or nsIWidget::NotifyIME(NOTIFY_IME_OF_SELECTION_CHANGE). * Please note that the text change observing cost is very expensive especially * on an HTML editor has focus. * If the IME implementation on a particular platform doesn't care about * NotifyIMEOfTextChange() and/or NotifyIME(NOTIFY_IME_OF_SELECTION_CHANGE), * they should set mWantUpdates to NOTIFY_NOTHING to avoid the cost. * * 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 { typedef int8_t Notifications; enum { NOTIFY_NOTHING = 0x0000, NOTIFY_SELECTION_CHANGE = 0x0001, NOTIFY_TEXT_CHANGE = 0x0002 }; nsIMEUpdatePreference() : mWantUpdates(NOTIFY_NOTHING), mWantHints(false) { } nsIMEUpdatePreference(Notifications aWantUpdates, bool aWantHints) : mWantUpdates(aWantUpdates), mWantHints(aWantHints) { } Notifications 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 { InputContext() : mNativeIMEContext(nullptr) {} bool IsPasswordEditor() const { return mHTMLInputType.LowerCaseEqualsLiteral("password"); } IMEState mIMEState; /* The type of the input if the input is a html input field */ nsString mHTMLInputType; /* The type of the inputmode */ nsString mHTMLInputInputmode; /* A hint for the action that is performed when the input is submitted */ nsString mActionHint; /* Native IME context for the widget. This doesn't come from the argument of SetInputContext(). If there is only one context in the process, this may be nullptr. */ void* mNativeIMEContext; }; 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) { } }; /** * Size constraints for setting the minimum and maximum size of a widget. * Values are in device pixels. */ struct SizeConstraints { SizeConstraints() : mMaxSize(NS_MAXSIZE, NS_MAXSIZE) { } SizeConstraints(nsIntSize aMinSize, nsIntSize aMaxSize) : mMinSize(aMinSize), mMaxSize(aMaxSize) { } nsIntSize mMinSize; nsIntSize mMaxSize; }; // NotificationToIME is shared by nsIMEStateManager and TextComposition. enum NotificationToIME { // XXX We should replace NOTIFY_IME_OF_CURSOR_POS_CHANGED with // NOTIFY_IME_OF_SELECTION_CHANGE later. NOTIFY_IME_OF_CURSOR_POS_CHANGED, // An editable content is getting focus NOTIFY_IME_OF_FOCUS, // An editable content is losing focus NOTIFY_IME_OF_BLUR, // Selection in the focused editable content is changed NOTIFY_IME_OF_SELECTION_CHANGE, REQUEST_TO_COMMIT_COMPOSITION, REQUEST_TO_CANCEL_COMPOSITION }; } // 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::TabChild TabChild; public: typedef mozilla::layers::Composer2D Composer2D; typedef mozilla::layers::CompositorChild CompositorChild; typedef mozilla::layers::LayerManager LayerManager; typedef mozilla::layers::LayersBackend LayersBackend; typedef mozilla::layers::PLayerTransactionChild PLayerTransactionChild; typedef mozilla::widget::NotificationToIME NotificationToIME; typedef mozilla::widget::IMEState IMEState; typedef mozilla::widget::InputContext InputContext; typedef mozilla::widget::InputContextAction InputContextAction; typedef mozilla::widget::SizeConstraints SizeConstraints; // Used in UpdateThemeGeometries. struct ThemeGeometry { // The -moz-appearance value for the themed widget uint8_t mWidgetType; // The device-pixel rect within the window for the themed widget nsIntRect mRect; ThemeGeometry(uint8_t aWidgetType, const nsIntRect& aRect) : mWidgetType(aWidgetType) , mRect(aRect) { } }; NS_DECLARE_STATIC_IID_ACCESSOR(NS_IWIDGET_IID) nsIWidget() : mLastChild(nullptr) , mPrevSibling(nullptr) , mOnDestroyCalled(false) {} /** * 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). * * The dimensions given in aRect are specified in the parent's * coordinate system, or for parentless widgets such as top-level * windows, in global CSS pixels. * * @param aParent parent nsIWidget * @param aNativeParent native parent widget * @param aRect the widget dimension * @param aContext * @param aInitData data that is used for widget initialization * */ NS_IMETHOD Create(nsIWidget *aParent, nsNativeWidget aNativeParent, const nsIntRect &aRect, nsDeviceContext *aContext, nsWidgetInitData *aInitData = nullptr) = 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 CreateChild(const nsIntRect &aRect, nsDeviceContext *aContext, nsWidgetInitData *aInitData = nullptr, bool aForceUseIWidgetParent = false) = 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 listener and update the device * context. The primary widget listener will continue to be called for * notifications relating to the top-level window, whereas other * notifications such as painting and events will instead be called via * the attached listener. SetAttachedWidgetListener should be used to * assign the attached listener. * * aUseAttachedEvents if true, events are sent to the attached listener * instead of the normal listener. * aContext The new device context for the view */ NS_IMETHOD AttachViewToTopLevel(bool aUseAttachedEvents, nsDeviceContext *aContext) = 0; /** * Accessor functions to get and set the attached listener. Used by * nsView in connection with AttachViewToTopLevel above. */ virtual void SetAttachedWidgetListener(nsIWidgetListener* aListener) = 0; virtual nsIWidgetListener* GetAttachedWidgetListener() = 0; /** * Accessor functions to get and set the listener which handles various * actions for the widget. */ //@{ virtual nsIWidgetListener* GetWidgetListener() = 0; virtual void SetWidgetListener(nsIWidgetListener* alistener) = 0; //@} /** * Close and destroy the internal native window. * This method does not delete the widget. */ NS_IMETHOD Destroy(void) = 0; /** * Destroyed() returns true if Destroy() has been called already. * Otherwise, false. */ bool Destroyed() const { return mOnDestroyCalled; } /** * 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 nullptr if this is a * top level window * * @return the parent widget or nullptr 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 nullptr 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 nullptr * */ 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". This will take into account Gecko preferences * overriding the system setting. */ mozilla::CSSToLayoutDeviceScale GetDefaultScale(); /** * Return the Gecko override of the system default scale, if any; * returns <= 0.0 if the system scale should be used as-is. * nsIWidget::GetDefaultScale() [above] takes this into account. * It is exposed here so that code that wants to check for a * default-scale override without having a widget on hand can * easily access the same value. * Note that any scale override is a browser-wide value, whereas * the default GetDefaultScale value (when no override is present) * may vary between widgets (or screens). */ static double DefaultScaleOverride(); /** * 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 * */ virtual bool IsVisible() const = 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, int32_t *aX, int32_t *aY) = 0; /** * NOTE: * * For a top-level window widget, the "parent's coordinate system" is the * "global" display pixel coordinate space, *not* device pixels (which * may be inconsistent between multiple screens, at least in the Mac OS * case with mixed hi-dpi and lo-dpi displays). This applies to all the * following Move and Resize widget APIs. * * The display-/device-pixel distinction becomes important for (at least) * Mac OS X with Hi-DPI (retina) displays, and Windows when the UI scale * factor is set to other than 100%. * * The Move and Resize methods take floating-point parameters, rather than * integer ones. This is important when manipulating top-level widgets, * where the coordinate system may not be an integral multiple of the * device-pixel space. **/ /** * 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(double aX, double 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(double aX, double aY) = 0; /** * Resize this widget. Any size constraints set for the window by a * previous call to SetSizeConstraints will be applied. * * @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(double aWidth, double aHeight, bool aRepaint) = 0; /** * Move or resize this widget. Any size constraints set for the window by * a previous call to SetSizeConstraints will be applied. * * @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(double aX, double aY, double aWidth, double 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(double aWidth, double 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(double aX, double aY, double aWidth, double aHeight, bool aRepaint) = 0; /** * Sets the widget's z-index. */ NS_IMETHOD SetZIndex(int32_t aZIndex) = 0; /** * Gets the widget's z-index. */ NS_IMETHOD GetZIndex(int32_t* 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 nsIWidgetListener.h) */ NS_IMETHOD SetSizeMode(int32_t aMode) = 0; /** * Return size mode (minimized, maximized, normalized). * Returns a value from nsSizeMode (see nsIWidgetListener.h) */ virtual int32_t SizeMode() = 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 */ virtual bool IsEnabled() const = 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. */ 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, uint32_t aHotspotX, uint32_t 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 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& 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* aRects) = 0; /** * Set the shadow style of the window. * * Ignored on child widgets and on non-Mac platforms. */ NS_IMETHOD SetWindowShadowStyle(int32_t 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(bool aShow) = 0; /* * On Mac OS X Lion, this method shows or hides the full screen button in * the titlebar that handles native full screen mode. * * Ignored on child widgets, non-Mac platforms, & pre-Lion Mac. */ virtual void SetShowsFullScreenButton(bool aShow) = 0; enum WindowAnimationType { eGenericWindowAnimation, eDocumentWindowAnimation }; /** * Sets the kind of top-level window animation this widget should have. On * Mac OS X, this causes a particular kind of animation to be shown when the * window is first made visible. * * Ignored on child widgets and on non-Mac platforms. */ virtual void SetWindowAnimationType(WindowAnimationType aType) = 0; /** * Hide window chrome (borders, buttons) for this widget. * */ NS_IMETHOD HideWindowChrome(bool aShouldHide) = 0; /** * Put the toplevel window into or out of fullscreen mode. * */ NS_IMETHOD MakeFullScreen(bool aFullScreen) = 0; /** * Invalidate a specified rect for a widget so that it will be repainted * later. */ NS_IMETHOD Invalidate(const nsIntRect & aRect) = 0; enum LayerManagerPersistence { LAYER_MANAGER_CURRENT = 0, LAYER_MANAGER_PERSISTENT }; /** * Return the widget's LayerManager. The layer tree for that * LayerManager is what gets rendered to the widget. * * @param aAllowRetaining an outparam that states whether the returned * layer manager should be used for retained layers */ inline LayerManager* GetLayerManager(bool* aAllowRetaining = nullptr) { return GetLayerManager(nullptr, mozilla::layers::LAYERS_NONE, LAYER_MANAGER_CURRENT, aAllowRetaining); } inline LayerManager* GetLayerManager(LayerManagerPersistence aPersistence, bool* aAllowRetaining = nullptr) { return GetLayerManager(nullptr, mozilla::layers::LAYERS_NONE, aPersistence, aAllowRetaining); } /** * Like GetLayerManager(), but prefers creating a layer manager of * type |aBackendHint| instead of what would normally be created. * LAYERS_NONE means "no hint". */ virtual LayerManager* GetLayerManager(PLayerTransactionChild* aShadowManager, LayersBackend aBackendHint, LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT, bool* aAllowRetaining = nullptr) = 0; /** * Called before each layer manager transaction to allow any preparation * for DrawWindowUnderlay/Overlay that needs to be on the main thread. * * Always called on the main thread. */ virtual void PrepareWindowEffects() = 0; /** * Called when shutting down the LayerManager to clean-up any cached resources. * * Always called from the compositing thread, which may be the main-thread if * OMTC is not enabled. */ virtual void CleanupWindowEffects() = 0; virtual void PreRender(LayerManager* aManager) = 0; /** * Called before the LayerManager draws the layer tree. * * Always called from the compositing thread, which may be the main-thread if * OMTC is not enabled. */ virtual void DrawWindowUnderlay(LayerManager* aManager, nsIntRect aRect) = 0; /** * Called after the LayerManager draws the layer tree * * Always called from the compositing thread, which may be the main-thread if * OMTC is not enabled. */ virtual void DrawWindowOverlay(LayerManager* aManager, nsIntRect aRect) = 0; /** * Return a DrawTarget for the window which can be composited into. * * Called by BasicCompositor on the compositor thread for OMTC drawing * before each composition. */ virtual mozilla::TemporaryRef StartRemoteDrawing() = 0; /** * Ensure that what was painted into the DrawTarget returned from * StartRemoteDrawing reaches the screen. * * Called by BasicCompositor on the compositor thread for OMTC drawing * after each composition. */ virtual void EndRemoteDrawing() = 0; /** * Clean up any resources used by Start/EndRemoteDrawing. * * Called by BasicCompositor on the compositor thread for OMTC drawing * when the compositor is destroyed. */ virtual void CleanupRemoteDrawing() = 0; /** * Called when Gecko knows which themed widgets exist in this window. * The passed array contains an entry for every themed widget of the right * type (currently only NS_THEME_MOZ_MAC_UNIFIED_TOOLBAR and * NS_THEME_TOOLBAR) within the window, except for themed widgets which are * transformed or have effects applied to them (e.g. CSS opacity or * filters). * This could sometimes be called during display list construction * outside of painting. * If called during painting, it will be called before we actually * paint anything. */ virtual void UpdateThemeGeometries(const nsTArray& aThemeGeometries) = 0; /** * Informs the widget about the region of the window that is opaque. * * @param aOpaqueRegion the region of the window that is opaque. */ virtual void UpdateOpaqueRegion(const nsIntRegion &aOpaqueRegion) {} /** * Internal methods */ //@{ virtual void AddChild(nsIWidget* aChild) = 0; virtual void RemoveChild(nsIWidget* aChild) = 0; virtual void* GetNativeData(uint32_t aDataType) = 0; virtual void FreeNativeData(void * data, uint32_t aDataType) = 0;//~~~ // GetDeviceContext returns a weak pointer to this widget's device context virtual nsDeviceContext* 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; /** * Given the specified client size, return the corresponding window size, * which includes the area for the borders and titlebar. This method * should work even when the window is not yet visible. */ virtual nsIntSize ClientToWindowSize(const nsIntSize& aClientSize) = 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(bool aEnable) = 0; /** * Enables/Disables system mouse capture. * @param aCapture true enables mouse capture, false disables mouse capture * */ NS_IMETHOD CaptureMouse(bool 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 * popup to be rolled up. aListener should be set to a non-null value for * any popups that are not managed by the popup manager. * @param aDoCapture true enables capture, false disables capture * */ NS_IMETHOD CaptureRollupEvents(nsIRollupListener* aListener, bool aDoCapture) = 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(int32_t aCycleCount) = 0; /** * Ask whether there user input events pending. All input events are * included, including those not targeted at this nsIwidget instance. */ virtual bool HasPendingInputEvent() = 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, bool 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(bool 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 bool 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, int32_t aHorizontal, int32_t aVertical) = 0; /** * Begin a window moving drag, based on the event passed in. */ NS_IMETHOD BeginMoveDrag(nsMouseEvent* aEvent) = 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(int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode, uint32_t 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, uint32_t aNativeMessage, uint32_t aModifierFlags) = 0; /** * A shortcut to SynthesizeNativeMouseEvent, abstracting away the native message. * aPoint is location in device pixels to which the mouse pointer moves to. */ virtual nsresult SynthesizeNativeMouseMove(nsIntPoint aPoint) = 0; /** * Utility method intended for testing. Dispatching native mouse scroll * events may move the mouse cursor. * * @param aPoint Mouse cursor position in screen coordinates. * In device pixels, the origin at the top left of * the primary display. * @param aNativeMessage Platform native message. * @param aDeltaX The delta value for X direction. If the native * message doesn't indicate X direction scrolling, * this may be ignored. * @param aDeltaY The delta value for Y direction. If the native * message doesn't indicate Y direction scrolling, * this may be ignored. * @param aDeltaZ The delta value for Z direction. If the native * message doesn't indicate Z direction scrolling, * this may be ignored. * @param aModifierFlags Must be values of Modifiers, or zero. * @param aAdditionalFlags See nsIDOMWidnowUtils' consts and their * document. */ virtual nsresult SynthesizeNativeMouseScrollEvent(nsIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX, double aDeltaY, double aDeltaZ, uint32_t aModifierFlags, uint32_t aAdditionalFlags) = 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 preceding 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; /** * Notify IME of the specified notification. */ NS_IMETHOD NotifyIME(NotificationToIME aNotification) = 0; /* * Notifies the input context changes. */ NS_IMETHOD_(void) SetInputContext(const InputContext& aContext, const InputContextAction& aAction) = 0; /* * Get current input context. */ NS_IMETHOD_(InputContext) GetInputContext() = 0; /** * Set layers acceleration to 'True' or 'False' */ NS_IMETHOD SetLayersAcceleration(bool aEnabled) = 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(uint32_t aKeyCode, bool* aLEDState) = 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 NotifyIMEOfTextChange(uint32_t aStart, uint32_t aOldEnd, uint32_t aNewEnd) = 0; /* * Retrieves preference for IME updates */ virtual nsIMEUpdatePreference GetIMEUpdatePreference() = 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 aOriginalDeltaX The X delta value of the current mouse wheel * scrolling event. * @param aOriginalDeltaX The Y delta value of the current mouse wheel * scrolling event. * @param aOverriddenDeltaX The overridden mouse scrolling speed along X * axis. This value may be same as aOriginalDeltaX. * @param aOverriddenDeltaY The overridden mouse scrolling speed along Y * axis. This value may be same as aOriginalDeltaY. */ NS_IMETHOD OverrideSystemMouseScrollSpeed(double aOriginalDeltaX, double aOriginalDeltaY, double& aOverriddenDeltaX, double& aOverriddenDeltaY) = 0; /** * Return true if this process shouldn't use platform widgets, and * so should use PuppetWidgets instead. If this returns true, the * result of creating and using a platform widget is undefined, * and likely to end in crashes or other buggy behavior. */ static bool UsePuppetWidgets() { return XRE_GetProcessType() == GeckoProcessType_Content; } /** * Allocate and return a "puppet widget" that doesn't directly * correlate to a platform widget; platform events and data must * be fed to it. Currently used in content processes. NULL is * returned if puppet widgets aren't supported in this build * config, on this platform, or for this process type. * * This function is called "Create" to match CreateInstance(). * The returned widget must still be nsIWidget::Create()d. */ static already_AddRefed CreatePuppetWidget(TabChild* aTabChild); /** * Reparent this widget's native widget. * @param aNewParent the native widget of aNewParent is the new native * parent widget */ NS_IMETHOD ReparentNativeWidget(nsIWidget* aNewParent) = 0; /** * Return the internal format of the default framebuffer for this * widget. */ virtual uint32_t GetGLFrameBufferFormat() { return 0; /*GL_NONE*/ } /** * Return true if widget has it's own GL context */ virtual bool HasGLContext() { return false; } /** * Returns true to indicate that this widget paints an opaque background * that we want to be visible under the page, so layout should not force * a default background. */ virtual bool WidgetPaintsBackground() { return false; } virtual bool NeedsPaint() { if (!IsVisible()) { return false; } nsIntRect bounds; nsresult rv = GetBounds(bounds); NS_ENSURE_SUCCESS(rv, false); return !bounds.IsEmpty(); } /** * Get the natural bounds of this widget. This method is only * meaningful for widgets for which Gecko implements screen * rotation natively. When this is the case, GetBounds() returns * the widget bounds taking rotation into account, and * GetNaturalBounds() returns the bounds *not* taking rotation * into account. * * No code outside of the composition pipeline should know or care * about this. If you're not an agent of the compositor, you * probably shouldn't call this method. */ virtual nsIntRect GetNaturalBounds() { nsIntRect bounds; GetBounds(bounds); return bounds; } /** * Set size constraints on the window size such that it is never less than * the specified minimum size and never larger than the specified maximum * size. The size constraints are sizes of the outer rectangle including * the window frame and title bar. Use 0 for an unconstrained minimum size * and NS_MAXSIZE for an unconstrained maximum size. Note that this method * does not necessarily change the size of a window to conform to this size, * thus Resize should be called afterwards. * * @param aConstraints: the size constraints in device pixels */ virtual void SetSizeConstraints(const SizeConstraints& aConstraints) = 0; /** * Return the size constraints currently observed by the widget. * * @return the constraints in device pixels */ virtual const SizeConstraints& GetSizeConstraints() const = 0; /** * If this is owned by a TabChild, return that. Otherwise return * null. */ virtual TabChild* GetOwningTabChild() { return nullptr; } /** * If this isn't directly compositing to its window surface, * return the compositor which is doing that on our behalf. */ virtual CompositorChild* GetRemoteRenderer() { return nullptr; } /** * If this widget has a more efficient composer available for its * native framebuffer, return it. * * This can be called from a non-main thread, but that thread must * hold a strong reference to this. */ virtual Composer2D* GetComposer2D() { return nullptr; } /** * Some platforms (only cocoa right now) round widget coordinates to the * nearest even pixels (see bug 892994), this function allows us to * determine how widget coordinates will be rounded. */ virtual int32_t RoundsWidgetCoordinatesTo() { return 1; } protected: /** * Like GetDefaultScale, but taking into account only the system settings * and ignoring Gecko preferences. */ virtual double GetDefaultScaleInternal() { return 1.0; } // 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; // When Destroy() is called, the sub class should set this true. bool mOnDestroyCalled; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIWidget, NS_IWIDGET_IID) #endif // nsIWidget_h__