/* -*- 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 "nsAutoPtr.h" #include "nsWidgetInitData.h" #include "nsTArray.h" #include "nsITheme.h" #include "nsITimer.h" #include "nsXULAppAPI.h" #include "mozilla/Maybe.h" #include "mozilla/EventForwards.h" #include "mozilla/layers/LayersTypes.h" #include "mozilla/RefPtr.h" #include "mozilla/TimeStamp.h" #include "mozilla/gfx/Point.h" #include "nsDataHashtable.h" #include "nsIObserver.h" #include "FrameMetrics.h" #include "Units.h" // forward declarations class nsIRollupListener; class imgIContainer; class nsIContent; class ViewWrapper; class nsIWidgetListener; class nsIntRegion; class nsIScreen; namespace mozilla { class CompositorVsyncDispatcher; class WritingMode; namespace dom { class TabChild; } namespace plugins { class PluginWidgetChild; } namespace layers { class Composer2D; class CompositorChild; class LayerManager; class LayerManagerComposite; class PLayerTransactionChild; struct ScrollableLayerGuid; } namespace gfx { class DrawTarget; class SourceSurface; } namespace widget { class TextEventDispatcher; } } /** * Callback function that processes events. * * The argument is actually a subtype (subclass) of WidgetEvent 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)(mozilla::WidgetGUIEvent* aEvent); // 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 and SetNativeData functions */ #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 #define NS_NATIVE_OPENGL_CONTEXT 12 #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 #define NS_NATIVE_CHILD_WINDOW 104 #endif #if defined(MOZ_WIDGET_GTK) // set/get nsPluginNativeWindowGtk, e10s specific #define NS_NATIVE_PLUGIN_OBJECT_PTR 104 #endif // See RegisterPluginWindowForRemoteUpdates #define NS_NATIVE_PLUGIN_ID 105 #define NS_IWIDGET_IID \ { 0x53376F57, 0xF081, 0x4949, \ { 0xB5, 0x5E, 0x87, 0xEF, 0x6A, 0xE9, 0xE3, 0x5A } }; /* * 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::NotifyIME() with * NOTIFY_IME_OF_SELECTION_CHANGE and/or NOTIFY_IME_OF_TEXT_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 * NOTIFY_IME_OF_SELECTION_CHANGE and/or NOTIFY_IME_OF_TEXT_CHANGE, * they should set mWantUpdates to NOTIFY_NOTHING to avoid the cost. * If the IME implementation needs notifications even while our process is * deactive, it should also set NOTIFY_DURING_DEACTIVE. */ struct nsIMEUpdatePreference { typedef uint8_t Notifications; enum : Notifications { NOTIFY_NOTHING = 0, NOTIFY_SELECTION_CHANGE = 1 << 0, NOTIFY_TEXT_CHANGE = 1 << 1, NOTIFY_POSITION_CHANGE = 1 << 2, // NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR is used when mouse button is pressed // or released on a character in the focused editor. The notification is // notified to IME as a mouse event. If it's consumed by IME, NotifyIME() // returns NS_SUCCESS_EVENT_CONSUMED. Otherwise, it returns NS_OK if it's // handled without any error. NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR = 1 << 3, // Following values indicate when widget needs or doesn't need notification. NOTIFY_CHANGES_CAUSED_BY_COMPOSITION = 1 << 6, // NOTE: NOTIFY_DURING_DEACTIVE isn't supported in environments where two // or more compositions are possible. E.g., Mac and Linux (GTK). NOTIFY_DURING_DEACTIVE = 1 << 7, // Changes are notified in following conditions if the instance is // just constructed. If some platforms don't need change notifications // in some of following conditions, the platform should remove following // flags before returing the instance from nsIWidget::GetUpdatePreference(). DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES = NOTIFY_CHANGES_CAUSED_BY_COMPOSITION }; nsIMEUpdatePreference() : mWantUpdates(DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES) { } explicit nsIMEUpdatePreference(Notifications aWantUpdates) : mWantUpdates(aWantUpdates | DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES) { } void DontNotifyChangesCausedByComposition() { mWantUpdates &= ~DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES; } bool WantSelectionChange() const { return !!(mWantUpdates & NOTIFY_SELECTION_CHANGE); } bool WantTextChange() const { return !!(mWantUpdates & NOTIFY_TEXT_CHANGE); } bool WantPositionChanged() const { return !!(mWantUpdates & NOTIFY_POSITION_CHANGE); } bool WantChanges() const { return WantSelectionChange() || WantTextChange(); } bool WantMouseButtonEventOnChar() const { return !!(mWantUpdates & NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR); } bool WantChangesCausedByComposition() const { return WantChanges() && !!(mWantUpdates & NOTIFY_CHANGES_CAUSED_BY_COMPOSITION); } bool WantDuringDeactive() const { return !!(mWantUpdates & NOTIFY_DURING_DEACTIVE); } Notifications mWantUpdates; }; /* * 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) { } explicit IMEState(Enabled aEnabled, Open aOpen = DONT_CHANGE_OPEN_STATE) : mEnabled(aEnabled), mOpen(aOpen) { } // Returns true if the user can input characters. // This means that a plain text editor, an HTML editor, a password editor or // a plain text editor whose ime-mode is "disabled". bool IsEditable() const { return mEnabled == ENABLED || mEnabled == PASSWORD; } // Returns true if the user might be able to input characters. // This means that a plain text editor, an HTML editor, a password editor, // a plain text editor whose ime-mode is "disabled" or a windowless plugin // has focus. bool MaybeEditable() const { return IsEditable() || mEnabled == PLUGIN; } }; struct InputContext { InputContext() : mNativeIMEContext(nullptr) , mOrigin(XRE_IsParentProcess() ? ORIGIN_MAIN : ORIGIN_CONTENT) , mMayBeIMEUnaware(false) {} 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; /** * mOrigin indicates whether this focus event refers to main or remote content. */ enum Origin { // Adjusting focus of content on the main process ORIGIN_MAIN, // Adjusting focus of content in a remote process ORIGIN_CONTENT }; Origin mOrigin; /* True if the webapp may be unaware of IME events such as input event or * composiion events. This enables a key-events-only mode on Android for * compatibility with webapps relying on key listeners. */ bool mMayBeIMEUnaware; bool IsOriginMainProcess() const { return mOrigin == ORIGIN_MAIN; } bool IsOriginContentProcess() const { return mOrigin == ORIGIN_CONTENT; } bool IsOriginCurrentProcess() const { if (XRE_IsParentProcess()) { return IsOriginMainProcess(); } return IsOriginContentProcess(); } }; 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) { } explicit 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(mozilla::LayoutDeviceIntSize aMinSize, mozilla::LayoutDeviceIntSize aMaxSize) : mMinSize(aMinSize), mMaxSize(aMaxSize) { } mozilla::LayoutDeviceIntSize mMinSize; mozilla::LayoutDeviceIntSize mMaxSize; }; // IMEMessage is shared by IMEStateManager and TextComposition. // Update values in GeckoEditable.java if you make changes here. // XXX Negative values are used in Android... typedef int8_t IMEMessageType; enum IMEMessage : IMEMessageType { // This is used by IMENotification internally. This means that the instance // hasn't been initialized yet. NOTIFY_IME_OF_NOTHING, // 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, // Text in the focused editable content is changed NOTIFY_IME_OF_TEXT_CHANGE, // Composition string has been updated NOTIFY_IME_OF_COMPOSITION_UPDATE, // Position or size of focused element may be changed. NOTIFY_IME_OF_POSITION_CHANGE, // Mouse button event is fired on a character in focused editor NOTIFY_IME_OF_MOUSE_BUTTON_EVENT, // Request to commit current composition to IME // (some platforms may not support) REQUEST_TO_COMMIT_COMPOSITION, // Request to cancel current composition to IME // (some platforms may not support) REQUEST_TO_CANCEL_COMPOSITION }; struct IMENotification { IMENotification() : mMessage(NOTIFY_IME_OF_NOTHING) {} MOZ_IMPLICIT IMENotification(IMEMessage aMessage) : mMessage(aMessage) { switch (aMessage) { case NOTIFY_IME_OF_SELECTION_CHANGE: mSelectionChangeData.mOffset = UINT32_MAX; mSelectionChangeData.mLength = 0; mSelectionChangeData.mWritingMode = 0; mSelectionChangeData.mReversed = false; mSelectionChangeData.mCausedByComposition = false; break; case NOTIFY_IME_OF_TEXT_CHANGE: mTextChangeData.Clear(); break; case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT: mMouseButtonEventData.mEventMessage = 0; mMouseButtonEventData.mOffset = UINT32_MAX; mMouseButtonEventData.mCursorPos.Set(nsIntPoint(0, 0)); mMouseButtonEventData.mCharRect.Set(nsIntRect(0, 0, 0, 0)); mMouseButtonEventData.mButton = -1; mMouseButtonEventData.mButtons = 0; mMouseButtonEventData.mModifiers = 0; default: break; } } void Clear() { mMessage = NOTIFY_IME_OF_NOTHING; } bool HasNotification() const { return mMessage != NOTIFY_IME_OF_NOTHING; } void MergeWith(const IMENotification& aNotification) { switch (mMessage) { case NOTIFY_IME_OF_NOTHING: MOZ_ASSERT(aNotification.mMessage != NOTIFY_IME_OF_NOTHING); *this = aNotification; break; case NOTIFY_IME_OF_SELECTION_CHANGE: MOZ_ASSERT(aNotification.mMessage == NOTIFY_IME_OF_SELECTION_CHANGE); mSelectionChangeData.mOffset = aNotification.mSelectionChangeData.mOffset; mSelectionChangeData.mLength = aNotification.mSelectionChangeData.mLength; mSelectionChangeData.mWritingMode = aNotification.mSelectionChangeData.mWritingMode; mSelectionChangeData.mReversed = aNotification.mSelectionChangeData.mReversed; mSelectionChangeData.mCausedByComposition = mSelectionChangeData.mCausedByComposition && aNotification.mSelectionChangeData.mCausedByComposition; break; case NOTIFY_IME_OF_TEXT_CHANGE: MOZ_ASSERT(aNotification.mMessage == NOTIFY_IME_OF_TEXT_CHANGE); mTextChangeData += aNotification.mTextChangeData; break; case NOTIFY_IME_OF_COMPOSITION_UPDATE: MOZ_ASSERT(aNotification.mMessage == NOTIFY_IME_OF_COMPOSITION_UPDATE); break; default: MOZ_CRASH("Merging notification isn't supported"); break; } } IMEMessage mMessage; // NOTIFY_IME_OF_SELECTION_CHANGE specific data struct SelectionChangeData { // Selection range. uint32_t mOffset; uint32_t mLength; // Writing mode at the selection. uint8_t mWritingMode; bool mReversed; bool mCausedByComposition; void SetWritingMode(const WritingMode& aWritingMode); WritingMode GetWritingMode() const; uint32_t StartOffset() const { return mOffset + (mReversed ? mLength : 0); } uint32_t EndOffset() const { return mOffset + (mReversed ? 0 : mLength); } bool IsInInt32Range() const { return mOffset + mLength <= INT32_MAX; } }; struct TextChangeDataBase { // mStartOffset is the start offset of modified or removed text in // original content and inserted text in new content. uint32_t mStartOffset; // mRemovalEndOffset is the end offset of modified or removed text in // original content. If the value is same as mStartOffset, no text hasn't // been removed yet. uint32_t mRemovedEndOffset; // mAddedEndOffset is the end offset of inserted text or same as // mStartOffset if just removed. The vlaue is offset in the new content. uint32_t mAddedEndOffset; bool mCausedByComposition; uint32_t OldLength() const { MOZ_ASSERT(IsValid()); return mRemovedEndOffset - mStartOffset; } uint32_t NewLength() const { MOZ_ASSERT(IsValid()); return mAddedEndOffset - mStartOffset; } // Positive if text is added. Negative if text is removed. int64_t Difference() const { return mAddedEndOffset - mRemovedEndOffset; } bool IsInInt32Range() const { MOZ_ASSERT(IsValid()); return mStartOffset <= INT32_MAX && mRemovedEndOffset <= INT32_MAX && mAddedEndOffset <= INT32_MAX; } bool IsValid() const { return !(mStartOffset == UINT32_MAX && !mRemovedEndOffset && !mAddedEndOffset); } void Clear() { mStartOffset = UINT32_MAX; mRemovedEndOffset = mAddedEndOffset = 0; } void MergeWith(const TextChangeDataBase& aOther); TextChangeDataBase& operator+=(const TextChangeDataBase& aOther) { MergeWith(aOther); return *this; } #ifdef DEBUG void Test(); #endif // #ifdef DEBUG }; // TextChangeDataBase cannot have constructors because they are used in union. // Therefore, TextChangeData should only implement constructor. In other // words, add other members to TextChangeDataBase. struct TextChangeData : public TextChangeDataBase { TextChangeData() { Clear(); } TextChangeData(uint32_t aStartOffset, uint32_t aRemovedEndOffset, uint32_t aAddedEndOffset, bool aCausedByComposition) { MOZ_ASSERT(aRemovedEndOffset >= aStartOffset, "removed end offset must not be smaller than start offset"); MOZ_ASSERT(aAddedEndOffset >= aStartOffset, "added end offset must not be smaller than start offset"); mStartOffset = aStartOffset; mRemovedEndOffset = aRemovedEndOffset; mAddedEndOffset = aAddedEndOffset; mCausedByComposition = aCausedByComposition; } }; union { // NOTIFY_IME_OF_SELECTION_CHANGE specific data SelectionChangeData mSelectionChangeData; // NOTIFY_IME_OF_TEXT_CHANGE specific data TextChangeDataBase mTextChangeData; // NOTIFY_IME_OF_MOUSE_BUTTON_EVENT specific data struct { // The value of WidgetEvent::message uint32_t mEventMessage; // Character offset from the start of the focused editor under the cursor uint32_t mOffset; // Cursor position in pixels relative to the widget struct { int32_t mX; int32_t mY; void Set(const nsIntPoint& aPoint) { mX = aPoint.x; mY = aPoint.y; } nsIntPoint AsIntPoint() const { return nsIntPoint(mX, mY); } } mCursorPos; // Character rect in pixels under the cursor relative to the widget struct { int32_t mX; int32_t mY; int32_t mWidth; int32_t mHeight; void Set(const nsIntRect& aRect) { mX = aRect.x; mY = aRect.y; mWidth = aRect.width; mHeight = aRect.height; } nsIntRect AsIntRect() const { return nsIntRect(mX, mY, mWidth, mHeight); } } mCharRect; // The value of WidgetMouseEventBase::button and buttons int16_t mButton; int16_t mButtons; // The value of WidgetInputEvent::modifiers Modifiers mModifiers; } mMouseButtonEventData; }; bool IsCausedByComposition() const { switch (mMessage) { case NOTIFY_IME_OF_SELECTION_CHANGE: return mSelectionChangeData.mCausedByComposition; case NOTIFY_IME_OF_TEXT_CHANGE: return mTextChangeData.mCausedByComposition; default: return false; } } }; struct AutoObserverNotifier { AutoObserverNotifier(nsIObserver* aObserver, const char* aTopic) : mObserver(aObserver) , mTopic(aTopic) { } void SkipNotification() { mObserver = nullptr; } uint64_t SaveObserver() { if (!mObserver) { return 0; } uint64_t observerId = ++sObserverId; sSavedObservers.Put(observerId, mObserver); SkipNotification(); return observerId; } ~AutoObserverNotifier() { if (mObserver) { mObserver->Observe(nullptr, mTopic, nullptr); } } static void NotifySavedObserver(const uint64_t& aObserverId, const char* aTopic) { nsCOMPtr observer = sSavedObservers.Get(aObserverId); if (!observer) { MOZ_ASSERT(aObserverId == 0, "We should always find a saved observer for nonzero IDs"); return; } sSavedObservers.Remove(aObserverId); observer->Observe(nullptr, aTopic, nullptr); } private: nsCOMPtr mObserver; const char* mTopic; private: static uint64_t sObserverId; static nsDataHashtable> sSavedObservers; }; } // 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::FrameMetrics FrameMetrics; typedef mozilla::layers::LayerManager LayerManager; typedef mozilla::layers::LayerManagerComposite LayerManagerComposite; typedef mozilla::layers::LayersBackend LayersBackend; typedef mozilla::layers::PLayerTransactionChild PLayerTransactionChild; typedef mozilla::layers::ZoomConstraints ZoomConstraints; typedef mozilla::widget::IMEMessage IMEMessage; typedef mozilla::widget::IMENotification IMENotification; typedef mozilla::widget::IMEState IMEState; typedef mozilla::widget::InputContext InputContext; typedef mozilla::widget::InputContextAction InputContextAction; typedef mozilla::widget::SizeConstraints SizeConstraints; typedef mozilla::widget::TextEventDispatcher TextEventDispatcher; typedef mozilla::CompositorVsyncDispatcher CompositorVsyncDispatcher; // Used in UpdateThemeGeometries. struct ThemeGeometry { // The ThemeGeometryType value for the themed widget, see // nsITheme::ThemeGeometryTypeForWidget. nsITheme::ThemeGeometryType mType; // The device-pixel rect within the window for the themed widget nsIntRect mRect; ThemeGeometry(nsITheme::ThemeGeometryType aType, const nsIntRect& aRect) : mType(aType) , mRect(aRect) { } }; NS_DECLARE_STATIC_IID_ACCESSOR(NS_IWIDGET_IID) nsIWidget() : mLastChild(nullptr) , mPrevSibling(nullptr) , mOnDestroyCalled(false) , mWindowType(eWindowType_child) , mZIndex(0) { ClearNativeTouchSequence(nullptr); } /** * 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 aInitData data that is used for widget initialization * */ NS_IMETHOD Create(nsIWidget *aParent, nsNativeWidget aNativeParent, const nsIntRect &aRect, 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, 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. */ NS_IMETHOD AttachViewToTopLevel(bool aUseAttachedEvents) = 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; /** * 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; /** * Returns the CompositorVsyncDispatcher associated with this widget */ virtual CompositorVsyncDispatcher* GetCompositorVsyncDispatcher() = 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; /** * The maximum number of simultaneous touch contacts supported by the device. * In the case of devices with multiple digitizers (e.g. multiple touch screens), * the value will be the maximum of the set of maximum supported contacts by * each individual digitizer. */ virtual uint32_t GetMaxTouchPoints() const = 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. */ virtual void SetZIndex(int32_t aZIndex) = 0; /** * Gets the widget's z-index. */ int32_t GetZIndex() { return mZIndex; } /** * 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; /** * Similar to GetScreenBounds except that this function will always * get the size when the widget is in the nsSizeMode_Normal size mode * even if the current size mode is not nsSizeMode_Normal. * This method will fail if the size mode is not nsSizeMode_Normal and * the platform doesn't have the ability. * This method will always succeed if the current size mode is * nsSizeMode_Normal. * * @param aRect On return it holds the x, y, width and height of * this widget. */ NS_IMETHOD GetRestoredBounds(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; /** * Equivalent to GetClientBounds but only returns the size. */ virtual mozilla::gfx::IntSize GetClientSize() { // Dependeing on the backend, overloading this method may be useful if // if requesting the client offset is expensive. nsIntRect rect; GetClientBounds(rect); return mozilla::gfx::IntSize(rect.width, rect.height); } /** * Set the background color for this widget * * @param aColor the new background color * */ virtual void SetBackgroundColor(const nscolor &aColor) { } /** * 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; /** * If a cursor type is currently cached locally for this widget, clear the * cached cursor to force an update on the next SetCursor call. */ virtual void ClearCachedCursor() = 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. */ nsWindowType WindowType() { return mWindowType; } /** * Determines if this widget is one of the three types of plugin widgets. */ bool IsPlugin() { return mWindowType == eWindowType_plugin || mWindowType == eWindowType_plugin_ipc_chrome || mWindowType == eWindowType_plugin_ipc_content; } /** * 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 { nsCOMPtr mChild; uintptr_t mWindowID; // e10s specific, the unique plugin port id bool mVisible; // e10s specific, widget visibility 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; virtual nsresult SetWindowClipRegion(const nsTArray& aRects, bool aIntersectWithExisting) = 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; /** * Register or unregister native plugin widgets which receive Configuration * data from the content process via the compositor. * * Lookups are used by the main thread via the compositor to lookup widgets * based on a unique window id. On Windows and Linux this is the * NS_NATIVE_PLUGIN_PORT (hwnd/XID). This tracking maintains a reference to * widgets held. Consumers are responsible for removing widgets from this * list. */ virtual void RegisterPluginWindowForRemoteUpdates() = 0; virtual void UnregisterPluginWindowForRemoteUpdates() = 0; static nsIWidget* LookupRegisteredPluginWindow(uintptr_t aWindowID); /** * Iterates across the list of registered plugin widgets and updates thier * visibility based on which plugins are included in the 'visible' list. * * The compositor knows little about tabs, but it does know which plugin * widgets are currently included in the visible layer tree. It calls this * helper to hide widgets it knows nothing about. */ static void UpdateRegisteredPluginWindowVisibility(uintptr_t aOwnerWidget, nsTArray& aVisibleList); /** * 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; /** * Specifies whether the window title should be drawn even if the window * contents extend into the titlebar. Ignored on windows that don't draw * in the titlebar. Only implemented on OS X. */ virtual void SetDrawsTitle(bool aDrawTitle) {} /** * Indicates whether the widget should attempt to make titlebar controls * easier to see on dark titlebar backgrounds. */ virtual void SetUseBrightTitlebarForeground(bool aBrightForeground) {} /** * Hide window chrome (borders, buttons) for this widget. * */ NS_IMETHOD HideWindowChrome(bool aShouldHide) = 0; /** * Ask the widget to start the transition for entering or exiting * DOM Fullscreen. * * XXX This method is currently not actually implemented by any * widget. The only function of this method is to notify cocoa * window that it should not use the native fullscreen mode. This * method is reserved for bug 1160014 where a transition will be * added for DOM fullscreen. Hence, this function is likely to * be further changed then. */ virtual void PrepareForDOMFullscreenTransition() = 0; /** * Put the toplevel window into or out of fullscreen mode. * If aTargetScreen is given, attempt to go fullscreen on that screen, * if possible. (If not, it behaves as if aTargetScreen is null.) * If !aFullScreen, aTargetScreen is ignored. * aTargetScreen support is currently only implemented on Windows. */ NS_IMETHOD MakeFullScreen(bool aFullScreen, nsIScreen* aTargetScreen = nullptr) = 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::LayersBackend::LAYERS_NONE, LAYER_MANAGER_CURRENT, aAllowRetaining); } inline LayerManager* GetLayerManager(LayerManagerPersistence aPersistence, bool* aAllowRetaining = nullptr) { return GetLayerManager(nullptr, mozilla::layers::LayersBackend::LAYERS_NONE, aPersistence, aAllowRetaining); } /** * Like GetLayerManager(), but prefers creating a layer manager of * type |aBackendHint| instead of what would normally be created. * LayersBackend::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; /** * Called before rendering using OMTC. Returns false when the widget is * not ready to be rendered (for example while the window is closed). * * Always called from the compositing thread, which may be the main-thread if * OMTC is not enabled. */ virtual bool PreRender(LayerManagerComposite* aManager) = 0; /** * Called after rendering using OMTC. Not called when rendering was * cancelled by a negative return value from PreRender. * * Always called from the compositing thread, which may be the main-thread if * OMTC is not enabled. */ virtual void PostRender(LayerManagerComposite* aManager) = 0; /** * Called before the LayerManager draws the layer tree. * * Always called from the compositing thread. */ virtual void DrawWindowUnderlay(LayerManagerComposite* aManager, nsIntRect aRect) = 0; /** * Called after the LayerManager draws the layer tree * * Always called from the compositing thread. */ virtual void DrawWindowOverlay(LayerManagerComposite* 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 already_AddRefed 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; virtual void EndRemoteDrawingInRegion(mozilla::gfx::DrawTarget* aDrawTarget, nsIntRegion& aInvalidRegion) { EndRemoteDrawing(); } /** * 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) {} /** * Informs the widget about the region of the window that is draggable. */ virtual void UpdateWindowDraggingRegion(const nsIntRegion& aRegion) {} /** * Internal methods */ //@{ virtual void AddChild(nsIWidget* aChild) = 0; virtual void RemoveChild(nsIWidget* aChild) = 0; virtual void* GetNativeData(uint32_t aDataType) = 0; virtual void SetNativeData(uint32_t aDataType, uintptr_t aVal) = 0; virtual void FreeNativeData(void * data, uint32_t aDataType) = 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. The untyped version * exists temporarily to ease conversion to typed coordinates. * * @return screen coordinates stored in the x,y members */ virtual mozilla::LayoutDeviceIntPoint WidgetToScreenOffset() = 0; virtual nsIntPoint WidgetToScreenOffsetUntyped() { return mozilla::LayoutDeviceIntPoint::ToUntyped(WidgetToScreenOffset()); } /** * 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 mozilla::LayoutDeviceIntSize ClientToWindowSize( const mozilla::LayoutDeviceIntSize& aClientSize) = 0; /** * Dispatches an event to the widget * */ NS_IMETHOD DispatchEvent(mozilla::WidgetGUIEvent* event, nsEventStatus & aStatus) = 0; /** * Dispatches an event that must be handled by APZ first, when APZ is * enabled. If invoked in the child process, it is forwarded to the * parent process synchronously. */ virtual nsEventStatus DispatchAPZAwareEvent(mozilla::WidgetInputEvent* aEvent) = 0; /** * Dispatches an event that must be transformed by APZ first, but is not * actually handled by APZ. If invoked in the child process, it is * forwarded to the parent process synchronously. */ virtual nsEventStatus DispatchInputEvent(mozilla::WidgetInputEvent* aEvent) = 0; /** * Confirm an APZ-aware event target. This should be used when APZ will * not need a layers update to process the event. */ virtual void SetConfirmedTargetAPZC(uint64_t aInputBlockId, const nsTArray& aTargets) const = 0; /** * Returns true if APZ is in use, false otherwise. */ virtual bool AsyncPanZoomEnabled() const = 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; /** * 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(mozilla::WidgetGUIEvent* aEvent, int32_t aHorizontal, int32_t aVertical) = 0; /** * Begin a window moving drag, based on the event passed in. */ NS_IMETHOD BeginMoveDrag(mozilla::WidgetMouseEvent* 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. * @param aObserver the observer that will get notified once the events * have been dispatched. * @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, nsIObserver* aObserver) = 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) * @param aObserver the observer that will get notified once the events * have been dispatched. */ virtual nsresult SynthesizeNativeMouseEvent(mozilla::LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, uint32_t aModifierFlags, nsIObserver* aObserver) = 0; /** * A shortcut to SynthesizeNativeMouseEvent, abstracting away the native message. * aPoint is location in device pixels to which the mouse pointer moves to. * @param aObserver the observer that will get notified once the events * have been dispatched. */ virtual nsresult SynthesizeNativeMouseMove(mozilla::LayoutDeviceIntPoint aPoint, nsIObserver* aObserver) = 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. * @param aObserver The observer that will get notified once the * events have been dispatched. */ virtual nsresult SynthesizeNativeMouseScrollEvent(mozilla::LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX, double aDeltaY, double aDeltaZ, uint32_t aModifierFlags, uint32_t aAdditionalFlags, nsIObserver* aObserver) = 0; /* * TouchPointerState states for SynthesizeNativeTouchPoint. Match * touch states in nsIDOMWindowUtils.idl. */ enum TouchPointerState { // The pointer is in a hover state above the digitizer TOUCH_HOVER = (1 << 0), // The pointer is in contact with the digitizer TOUCH_CONTACT = (1 << 1), // The pointer has been removed from the digitizer detection area TOUCH_REMOVE = (1 << 2), // The pointer has been canceled. Will cancel any pending os level // gestures that would triggered as a result of completion of the // input sequence. This may not cancel moz platform related events // that might get tirggered by input already delivered. TOUCH_CANCEL = (1 << 3), // ALL_BITS used for validity checking during IPC serialization ALL_BITS = (1 << 4) - 1 }; /* * Create a new or update an existing touch pointer on the digitizer. * To trigger os level gestures, individual touch points should * transition through a complete set of touch states which should be * sent as individual messages. * * @param aPointerId The touch point id to create or update. * @param aPointerState one or more of the touch states listed above * @param aScreenX, aScreenY screen coords of this event * @param aPressure 0.0 -> 1.0 float val indicating pressure * @param aOrientation 0 -> 359 degree value indicating the * orientation of the pointer. Use 90 for normal taps. * @param aObserver The observer that will get notified once the events * have been dispatched. */ virtual nsresult SynthesizeNativeTouchPoint(uint32_t aPointerId, TouchPointerState aPointerState, nsIntPoint aPointerScreenPoint, double aPointerPressure, uint32_t aPointerOrientation, nsIObserver* aObserver) = 0; /* * Helper for simulating a simple tap event with one touch point. When * aLongTap is true, simulates a native long tap with a duration equal to * ui.click_hold_context_menus.delay. This pref is compatible with the * apzc long tap duration. Defaults to 1.5 seconds. * @param aObserver The observer that will get notified once the events * have been dispatched. */ virtual nsresult SynthesizeNativeTouchTap(nsIntPoint aPointerScreenPoint, bool aLongTap, nsIObserver* aObserver); /* * Cancels all active simulated touch input points and pending long taps. * Native widgets should track existing points such that they can clear the * digitizer state when this call is made. * @param aObserver The observer that will get notified once the touch * sequence has been cleared. */ virtual nsresult ClearNativeTouchSequence(nsIObserver* aObserver); /* * Snapshot the contents of the widget by reading pixels back from the * Operating System. Unlike RenderDocument(), this does not read from our * own backbuffers, so that we can test if there is a difference in how * our buffers are being presented. * * This is only supported for widgets using OMTC. */ already_AddRefed SnapshotWidgetOnScreen(); /* * Implementation of SnapshotWidgetOnScreen. This is invoked by the * compositor for SnapshotWidgetOnScreen(), and should not be called * otherwise. */ virtual bool CaptureWidgetOnScreen(mozilla::RefPtr aDT) = 0; private: class LongTapInfo { public: LongTapInfo(int32_t aPointerId, nsIntPoint& aPoint, mozilla::TimeDuration aDuration, nsIObserver* aObserver) : mPointerId(aPointerId), mPosition(aPoint), mDuration(aDuration), mObserver(aObserver), mStamp(mozilla::TimeStamp::Now()) { } int32_t mPointerId; nsIntPoint mPosition; mozilla::TimeDuration mDuration; nsCOMPtr mObserver; mozilla::TimeStamp mStamp; }; static void OnLongTapTimerCallback(nsITimer* aTimer, void* aClosure); nsAutoPtr mLongTapTouchPoint; nsCOMPtr mLongTapTimer; static int32_t sPointerIdCounter; public: /** * 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. * * @return If the notification is mouse button event and it's consumed by * IME, this returns NS_SUCCESS_EVENT_CONSUMED. */ NS_IMETHOD NotifyIME(const IMENotification& aIMENotification) = 0; /** * Start plugin IME. If this results in a string getting committed, the * result is in aCommitted (otherwise aCommitted is empty). * * aKeyboardEvent The event with which plugin IME is to be started * panelX and panelY Location in screen coordinates of the IME input panel * (should be just under the plugin) * aCommitted The string committed during IME -- otherwise empty */ NS_IMETHOD StartPluginIME(const mozilla::WidgetKeyboardEvent& aKeyboardEvent, int32_t aPanelX, int32_t aPanelY, nsString& aCommitted) = 0; /** * Tells the widget whether or not a plugin (inside the widget) has the * keyboard focus. Should be sent when the keyboard focus changes too or * from a plugin. * * aFocused Whether or not a plugin is focused */ NS_IMETHOD SetPluginFocused(bool& aFocused) = 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; /* * Given a WidgetKeyboardEvent, this method synthesizes a corresponding * native (OS-level) event for it. This method allows tests to simulate * keystrokes that trigger native key bindings (which require a native * event). */ NS_IMETHOD AttachNativeKeyEvent(mozilla::WidgetKeyboardEvent& aEvent) = 0; /* * Execute native key bindings for aType. */ typedef void (*DoCommandCallback)(mozilla::Command, void*); enum NativeKeyBindingsType { NativeKeyBindingsForSingleLineEditor, NativeKeyBindingsForMultiLineEditor, NativeKeyBindingsForRichTextEditor }; NS_IMETHOD_(bool) ExecuteNativeKeyBinding( NativeKeyBindingsType aType, const mozilla::WidgetKeyboardEvent& aEvent, DoCommandCallback aCallback, void* aCallbackData) = 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; /* * 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_IsContentProcess(); } /** * 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); /** * Allocate and return a "plugin proxy widget", a subclass of PuppetWidget * used in wrapping a PPluginWidget connection for remote widgets. Note * this call creates the base object, it does not create the widget. Use * nsIWidget's Create to do this. */ static already_AddRefed CreatePluginProxyWidget(TabChild* aTabChild, mozilla::plugins::PluginWidgetChild* aActor); /** * 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; } virtual void UpdateZoomConstraints(const uint32_t& aPresShellId, const FrameMetrics::ViewID& aViewId, const mozilla::Maybe& aConstraints) {}; /** * GetTextEventDispatcher() returns TextEventDispatcher belonging to the * widget. Note that this never returns nullptr. */ NS_IMETHOD_(TextEventDispatcher*) GetTextEventDispatcher() = 0; 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* MOZ_NON_OWNING_REF mLastChild; nsCOMPtr mNextSibling; nsIWidget* MOZ_NON_OWNING_REF mPrevSibling; // When Destroy() is called, the sub class should set this true. bool mOnDestroyCalled; nsWindowType mWindowType; int32_t mZIndex; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIWidget, NS_IWIDGET_IID) #endif // nsIWidget_h__