зеркало из https://github.com/mozilla/gecko-dev.git
272 строки
10 KiB
Plaintext
272 строки
10 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "domstubs.idl"
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interface nsIDocument;
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interface nsIContent;
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[scriptable, uuid(2487F9CA-D05F-4BD1-8F43-5964E746C482)]
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/**
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* The focus manager deals with all focus related behaviour. Only one element
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* in the entire application may have the focus at a time; this element
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* receives any keyboard events. While there is only one application-wide
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* focused element, each nsIDOMWindow maintains a reference to the element
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* that would be focused if the window was active.
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*
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* If the window's reference is to a frame element (iframe, browser,
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* editor), then the child window contains the element that is currently
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* focused. If the window's reference is to a root element, then the root is
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* focused. If a window's reference is null, then no element is focused, yet
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* the window is still focused.
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*
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* The blur event is fired on an element when it loses the application focus.
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* After this blur event, if the focus is moving away from a document, two
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* additional blur events are fired on the old document and window containing
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* the focus respectively.
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*
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* When a new document is focused, two focus events are fired on the new
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* document and window respectively. Then the focus event is fired on an
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* element when it gains the application focus.
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*
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* A special case is that the root element may be focused, yet does not
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* receive the element focus and blur events. Instead a focus outline may be
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* drawn around the document.
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*
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* Blur and focus events do not bubble as per the W3C DOM Events spec.
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*/
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interface nsIFocusManager : nsISupports
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{
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/**
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* The most active (frontmost) window, or null if no window that is part of
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* the application is active. Setting the activeWindow raises it, and
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* focuses the current child window's current element, if any. Setting this
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* to null or to a non-top-level window throws an NS_ERROR_INVALID_ARG
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* exception.
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*/
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attribute nsIDOMWindow activeWindow;
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/**
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* The child window within the activeWindow that is focused. This will
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* always be activeWindow, a child window of activeWindow or null if no
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* child window is focused. Setting the focusedWindow changes the focused
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* window and raises the toplevel window it is in. If the current focus
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* within the new focusedWindow is a frame element, then the focusedWindow
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* will actually be set to the child window and the current element within
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* that set as the focused element. This process repeats downwards until a
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* non-frame element is found.
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*/
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attribute nsIDOMWindow focusedWindow;
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/**
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* The element that is currently focused. This will always be an element
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* within the document loaded in focusedWindow or null if no element in that
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* document is focused.
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*/
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readonly attribute nsIDOMElement focusedElement;
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/**
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* Returns the method that was used to focus the element in window. This
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* will either be 0, FLAG_BYMOUSE or FLAG_BYKEY. If window is null, then
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* the current focusedWindow will be used by default. This has the result
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* of retrieving the method that was used to focus the currently focused
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* element.
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*/
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uint32_t getLastFocusMethod(in nsIDOMWindow window);
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/**
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* Changes the focused element reference within the window containing
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* aElement to aElement.
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*/
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void setFocus(in nsIDOMElement aElement, in unsigned long aFlags);
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/**
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* Move the focus to another element. If aStartElement is specified, then
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* movement is done relative to aStartElement. If aStartElement is null,
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* then movement is done relative to the currently focused element. If no
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* element is focused, focus the first focusable element within the
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* document (or the last focusable element if aType is MOVEFOCUS_END). This
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* method is equivalent to setting the focusedElement to the new element.
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*
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* Specifying aStartElement and using MOVEFOCUS_LAST is not currently
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* implemented.
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*
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* If no element is found, and aType is either MOVEFOCUS_ROOT or
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* MOVEFOCUS_CARET, then the focus is cleared. If aType is any other value,
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* the focus is not changed.
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*
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* Returns the element that was focused. The return value may be null if focus
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* was moved into a child process.
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*/
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nsIDOMElement moveFocus(in nsIDOMWindow aWindow, in nsIDOMElement aStartElement,
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in unsigned long aType, in unsigned long aFlags);
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/**
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* Clears the focused element within aWindow. If the current focusedWindow
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* is a descendant of aWindow, sets the current focusedWindow to aWindow.
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*
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* @throws NS_ERROR_INVALID_ARG if aWindow is null
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*/
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void clearFocus(in nsIDOMWindow aWindow);
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/**
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* Returns the currently focused element within aWindow. If aWindow is equal
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* to the current value of focusedWindow, then the returned element will be
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* the application-wide focused element (the value of focusedElement). The
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* return value will be null if no element is focused.
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*
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* If aDeep is true, then child frames are traversed and the return value
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* may be the element within a child descendant window that is focused. If
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* aDeep if false, then the return value will be the frame element if the
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* focus is in a child frame.
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*
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* aFocusedWindow will be set to the currently focused descendant window of
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* aWindow, or to aWindow if aDeep is false. This will be set even if no
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* element is focused.
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*
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* @throws NS_ERROR_INVALID_ARG if aWindow is null
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*/
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nsIDOMElement getFocusedElementForWindow(in nsIDOMWindow aWindow, in boolean aDeep,
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out nsIDOMWindow aFocusedWindow);
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/**
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* Moves the selection caret within aWindow to the current focus.
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*/
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void moveCaretToFocus(in nsIDOMWindow aWindow);
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/***
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* Check if given element is focusable.
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*/
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boolean elementIsFocusable(in nsIDOMElement aElement, in unsigned long aFlags);
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/*
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* Raise the window when switching focus
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*/
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const unsigned long FLAG_RAISE = 1;
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/**
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* Do not scroll the element to focus into view
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*/
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const unsigned long FLAG_NOSCROLL = 2;
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/**
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* If attempting to change focus in a window that is not focused, do not
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* switch focus to that window. Instead, just update the focus within that
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* window and leave the application focus as is. This flag will have no
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* effect if a child window is focused and an attempt is made to adjust the
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* focus in an ancestor, as the frame must be switched in this case.
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*/
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const unsigned long FLAG_NOSWITCHFRAME = 4;
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/**
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* This flag is only used when passed to moveFocus. If set, focus is never
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* moved to the parent frame of the starting element's document, instead
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* iterating around to the beginning of that document again. Child frames
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* are navigated as normal.
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*/
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const unsigned long FLAG_NOPARENTFRAME = 8;
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/**
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* Focus is changing due to a mouse operation, for instance the mouse was
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* clicked on an element.
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*/
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const unsigned long FLAG_BYMOUSE = 0x1000;
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/**
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* Focus is changing due to a key operation, for instance pressing the tab
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* key. This flag would normally be passed when MOVEFOCUS_FORWARD or
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* MOVEFOCUS_BACKWARD is used.
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*/
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const unsigned long FLAG_BYKEY = 0x2000;
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/**
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* Focus is changing due to a call to MoveFocus. This flag will be implied
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* when MoveFocus is called except when one of the other mechanisms (mouse
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* or key) is specified, or when the type is MOVEFOCUS_ROOT or
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* MOVEFOCUS_CARET.
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*/
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const unsigned long FLAG_BYMOVEFOCUS = 0x4000;
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/**
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* Always show the focus ring or other indicator of focus, regardless of
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* other state.
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*/
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const unsigned long FLAG_SHOWRING = 0x100000;
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/**
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* Focus is changing due to a touch operation that generated a mouse event.
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* Normally used in conjunction with FLAG_BYMOUSE.
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*/
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const unsigned long FLAG_BYTOUCH = 0x200000;
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// these constants are used with the aType argument to MoveFocus
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/** move focus forward one element, used when pressing TAB */
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const unsigned long MOVEFOCUS_FORWARD = 1;
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/** move focus backward one element, used when pressing Shift+TAB */
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const unsigned long MOVEFOCUS_BACKWARD = 2;
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/** move focus forward to the next frame document, used when pressing F6 */
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const unsigned long MOVEFOCUS_FORWARDDOC = 3;
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/** move focus forward to the previous frame document, used when pressing Shift+F6 */
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const unsigned long MOVEFOCUS_BACKWARDDOC = 4;
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/** move focus to the first focusable element */
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const unsigned long MOVEFOCUS_FIRST = 5;
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/** move focus to the last focusable element */
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const unsigned long MOVEFOCUS_LAST = 6;
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/** move focus to the root element in the document */
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const unsigned long MOVEFOCUS_ROOT = 7;
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/** move focus to a link at the position of the caret. This is a special value used to
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* focus links as the caret moves over them in caret browsing mode.
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*/
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const unsigned long MOVEFOCUS_CARET = 8;
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/** move focus to the first focusable document */
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const unsigned long MOVEFOCUS_FIRSTDOC = 9;
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/** move focus to the last focusable document */
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const unsigned long MOVEFOCUS_LASTDOC = 10;
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/**
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* Called when a window has been raised.
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*/
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[noscript] void windowRaised(in nsIDOMWindow aWindow);
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/**
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* Called when a window has been lowered.
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*/
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[noscript] void windowLowered(in nsIDOMWindow aWindow);
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/**
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* Called when a new document in a window is shown.
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*
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* If aNeedsFocus is true, then focus events are expected to be fired on the
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* window if this window is in the focused window chain.
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*/
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[noscript] void windowShown(in nsIDOMWindow aWindow, in boolean aNeedsFocus);
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/**
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* Called when a document in a window has been hidden or otherwise can no
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* longer accept focus.
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*/
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[noscript] void windowHidden(in nsIDOMWindow aWindow);
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/**
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* Fire any events that have been delayed due to synchronized actions.
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*/
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[noscript] void fireDelayedEvents(in nsIDocument aDocument);
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/**
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* Indicate that a plugin wishes to take the focus. This is similar to a
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* normal focus except that the widget focus is not changed. Updating the
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* widget focus state is the responsibility of the caller.
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*/
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[noscript] void focusPlugin(in nsIContent aPlugin);
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/**
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* Used in a child process to indicate that the parent window is now
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* active or deactive.
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*/
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[noscript] void parentActivated(in nsIDOMWindow aWindow, in bool active);
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};
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