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| -rw-r--r-- | dom/interfaces/base/nsIFocusManager.idl | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/dom/interfaces/base/nsIFocusManager.idl b/dom/interfaces/base/nsIFocusManager.idl new file mode 100644 index 0000000000..b27fb3e279 --- /dev/null +++ b/dom/interfaces/base/nsIFocusManager.idl @@ -0,0 +1,282 @@ +/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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/. */ + +#include "domstubs.idl" + +interface mozIDOMWindowProxy; + +webidl BrowsingContext; +webidl Document; +webidl Element; + +native CallerType(mozilla::dom::CallerType); + +/** + * The focus manager deals with all focus related behaviour. Only one element + * in the entire application may have the focus at a time; this element + * receives any keyboard events. While there is only one application-wide + * focused element, each nsIDOMWindow maintains a reference to the element + * that would be focused if the window was active. + * + * If the window's reference is to a frame element (iframe, browser, + * editor), then the child window contains the element that is currently + * focused. If the window's reference is to a root element, then the root is + * focused. If a window's reference is null, then no element is focused, yet + * the window is still focused. + * + * The blur event is fired on an element when it loses the application focus. + * After this blur event, if the focus is moving away from a document, two + * additional blur events are fired on the old document and window containing + * the focus respectively. + * + * When a new document is focused, two focus events are fired on the new + * document and window respectively. Then the focus event is fired on an + * element when it gains the application focus. + * + * A special case is that the root element may be focused, yet does not + * receive the element focus and blur events. Instead a focus outline may be + * drawn around the document. + * + * Blur and focus events do not bubble as per the W3C DOM Events spec. + */ +[scriptable, uuid(86e1f1e1-365d-493b-b52a-a649f3f311dc)] +interface nsIFocusManager : nsISupports +{ + /** + * The most active (frontmost) window, or null if no window that is part of + * the application is active. Do not use outside the parent process. + */ + readonly attribute mozIDOMWindowProxy activeWindow; + + /** + * In the parent process: The BrowsingContext corresponding to activeWindow. + * In content processes: The top-level Web content browsing context that + * focus is in if the application is active and focus is in Web content. + */ + readonly attribute BrowsingContext activeBrowsingContext; + + /** + * The child window within the activeWindow that is focused. This will + * always be activeWindow, a child window of activeWindow or null if no + * child window is focused. Setting the focusedWindow changes the focused + * window and raises the toplevel window it is in. If the current focus + * within the new focusedWindow is a frame element, then the focusedWindow + * will actually be set to the child window and the current element within + * that set as the focused element. This process repeats downwards until a + * non-frame element is found. + * The setter for this attribute defaults to CallerType::System. + * If focus is in another process, this is null in content processes and + * the closest ancestor in the parent process. + */ + [setter_can_run_script] + attribute mozIDOMWindowProxy focusedWindow; + + /** + * Parent-process only: The content BrowsingContext that currently has focus, + * if any. Note this can be different from activeBrowsingContext in the case + * of subframes. + */ + readonly attribute BrowsingContext focusedContentBrowsingContext; + + /** + * The element that is currently focused. This will always be an element + * within the document loaded in focusedWindow or null if no element in that + * document is focused. + */ + readonly attribute Element focusedElement; + + /** + * Returns the method that was used to focus the element in window. This + * will either be 0, FLAG_BYMOUSE or FLAG_BYKEY. If window is null, then + * the current focusedWindow will be used by default. This has the result + * of retrieving the method that was used to focus the currently focused + * element. + */ + uint32_t getLastFocusMethod(in mozIDOMWindowProxy window); + + /** + * Changes the focused element reference within the window containing + * aElement to aElement or potentially redirects it to an anonymous + * descendant of it (e.g., for `<input type="number">` the focus is redirected + * to its descendant `<input type="text">`). + */ + [can_run_script] + void setFocus(in Element aElement, in unsigned long aFlags); + + /** + * Move the focus to another element. If aStartElement is specified, then + * movement is done relative to aStartElement. If aStartElement is null, + * then movement is done relative to the currently focused element. If no + * element is focused, focus the first focusable element within the + * document (or the last focusable element if aType is MOVEFOCUS_END). This + * method is equivalent to setting the focusedElement to the new element. + * + * Specifying aStartElement and using MOVEFOCUS_LAST is not currently + * implemented. + * + * If no element is found, and aType is either MOVEFOCUS_ROOT or + * MOVEFOCUS_CARET, then the focus is cleared. If aType is any other value, + * the focus is not changed. + * + * Returns the element that was focused (see setFocus). The return value + * may be null if focus was moved into a child process. + */ + Element moveFocus(in mozIDOMWindowProxy aWindow, + in Element aStartElement, + in unsigned long aType, in unsigned long aFlags); + + /** + * Clears the focused element within aWindow. If the current focusedWindow + * is a descendant of aWindow, sets the current focusedWindow to aWindow. + * + * @throws NS_ERROR_INVALID_ARG if aWindow is null + */ + [can_run_script] + void clearFocus(in mozIDOMWindowProxy aWindow); + + /** + * Returns the currently focused element within aWindow. If aWindow is equal + * to the current value of focusedWindow, then the returned element will be + * the application-wide focused element (the value of focusedElement). The + * return value will be null if no element is focused. + * + * If aDeep is true, then child frames are traversed and the return value + * may be the element within a child descendant window that is focused. If + * aDeep if false, then the return value will be the frame element if the + * focus is in a child frame. + * + * aFocusedWindow will be set to the currently focused descendant window of + * aWindow, or to aWindow if aDeep is false. This will be set even if no + * element is focused. + * + * @throws NS_ERROR_INVALID_ARG if aWindow is null + */ + Element getFocusedElementForWindow(in mozIDOMWindowProxy aWindow, + in boolean aDeep, + out mozIDOMWindowProxy aFocusedWindow); + + /** + * Moves the selection caret within aWindow to the current focus. + */ + [can_run_script] + void moveCaretToFocus(in mozIDOMWindowProxy aWindow); + + /*** + * Check if given element (or potentially a descendant, see setFocus) is + * focusable. + */ + [can_run_script] + boolean elementIsFocusable(in Element aElement, in unsigned long aFlags); + + /* + * Raise the window when switching focus + */ + const unsigned long FLAG_RAISE = 1; + + /** + * Do not scroll the element to focus into view. + */ + const unsigned long FLAG_NOSCROLL = 2; + + /** + * If attempting to change focus in a window that is not focused, do not + * switch focus to that window. Instead, just update the focus within that + * window and leave the application focus as is. This flag will have no + * effect if a child window is focused and an attempt is made to adjust the + * focus in an ancestor, as the frame must be switched in this case. + */ + const unsigned long FLAG_NOSWITCHFRAME = 4; + + /** + * This flag is only used when passed to moveFocus. If set, focus is never + * moved to the parent frame of the starting element's document, instead + * iterating around to the beginning of that document again. Child frames + * are navigated as normal. + */ + const unsigned long FLAG_NOPARENTFRAME = 8; + + /** + * This flag is used for window and element focus operations to signal + * wether the caller is system or non system. + */ + const unsigned long FLAG_NONSYSTEMCALLER = 16; + + /** + * Focus is changing due to a mouse operation, for instance the mouse was + * clicked on an element. + */ + const unsigned long FLAG_BYMOUSE = 0x1000; + + /** + * Focus is changing due to a key operation, for instance pressing the tab + * key. This flag would normally be passed when MOVEFOCUS_FORWARD or + * MOVEFOCUS_BACKWARD is used. + */ + const unsigned long FLAG_BYKEY = 0x2000; + + /** + * Focus is changing due to a call to MoveFocus. This flag will be implied + * when MoveFocus is called except when one of the other mechanisms (mouse + * or key) is specified, or when the type is MOVEFOCUS_ROOT or + * MOVEFOCUS_CARET. + */ + const unsigned long FLAG_BYMOVEFOCUS = 0x4000; + + /** + * Do not show a ring around the element to focus, if this is not a text + * control, regardless of other state. + */ + const unsigned long FLAG_NOSHOWRING = 0x8000; + + /** + * Always show the focus ring or other indicator of focus, regardless of + * other state. Overrides FLAG_NOSHOWRING. + */ + const unsigned long FLAG_SHOWRING = 0x100000; + + /** + * Focus is changing due to a touch operation that generated a mouse event. + * Normally used in conjunction with FLAG_BYMOUSE. + */ + const unsigned long FLAG_BYTOUCH = 0x200000; + + /** Focus is changing due to a JS focus() call or similar operation. */ + const unsigned long FLAG_BYJS = 0x400000; + + /** Focus is changing due to a long press operation by touch or mouse. */ + const unsigned long FLAG_BYLONGPRESS = 0x800000; + + /** Mask with all the focus methods. */ + const unsigned long METHOD_MASK = FLAG_BYMOUSE | FLAG_BYKEY | FLAG_BYMOVEFOCUS | FLAG_BYTOUCH | FLAG_BYJS | FLAG_BYLONGPRESS; + + /** Mask with all the focus methods, plus the SHOW / NOSHOWRING flags. */ + const unsigned long METHODANDRING_MASK = METHOD_MASK | FLAG_SHOWRING | FLAG_NOSHOWRING; + + // these constants are used with the aType argument to MoveFocus + + /** move focus forward one element, used when pressing TAB */ + const unsigned long MOVEFOCUS_FORWARD = 1; + /** move focus backward one element, used when pressing Shift+TAB */ + const unsigned long MOVEFOCUS_BACKWARD = 2; + /** move focus forward to the next frame document, used when pressing F6 */ + const unsigned long MOVEFOCUS_FORWARDDOC = 3; + /** move focus forward to the previous frame document, used when pressing Shift+F6 */ + const unsigned long MOVEFOCUS_BACKWARDDOC = 4; + /** move focus to the first focusable element */ + const unsigned long MOVEFOCUS_FIRST = 5; + /** move focus to the last focusable element */ + const unsigned long MOVEFOCUS_LAST = 6; + /** move focus to the root element in the document */ + const unsigned long MOVEFOCUS_ROOT = 7; + /** move focus to a link at the position of the caret. This is a special value used to + * focus links as the caret moves over them in caret browsing mode. + */ + const unsigned long MOVEFOCUS_CARET = 8; + + /** move focus to the first focusable document */ + const unsigned long MOVEFOCUS_FIRSTDOC = 9; + /** move focus to the last focusable document */ + const unsigned long MOVEFOCUS_LASTDOC = 10; +}; |