зеркало из https://github.com/mozilla/gecko-dev.git
336 строки
11 KiB
C++
336 строки
11 KiB
C++
/* -*- Mode: C++; 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/. */
|
|
|
|
#ifndef nsCoreUtils_h_
|
|
#define nsCoreUtils_h_
|
|
|
|
#include "mozilla/EventForwards.h"
|
|
#include "nsIAccessibleEvent.h"
|
|
#include "nsIContent.h"
|
|
#include "mozilla/FlushType.h"
|
|
#include "mozilla/PresShellForwards.h"
|
|
|
|
#include "nsPoint.h"
|
|
#include "nsTArray.h"
|
|
|
|
class nsRange;
|
|
class nsTreeColumn;
|
|
class nsIFrame;
|
|
class nsIDocShell;
|
|
class nsIWidget;
|
|
|
|
namespace mozilla {
|
|
class PresShell;
|
|
namespace dom {
|
|
class Document;
|
|
class XULTreeElement;
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
/**
|
|
* Core utils.
|
|
*/
|
|
class nsCoreUtils {
|
|
public:
|
|
typedef mozilla::PresShell PresShell;
|
|
typedef mozilla::dom::Document Document;
|
|
|
|
/**
|
|
* Return true if the given node is a label of a control.
|
|
*/
|
|
static bool IsLabelWithControl(nsIContent* aContent);
|
|
|
|
/**
|
|
* Return true if the given node has registered click, mousedown or mouseup
|
|
* event listeners.
|
|
*/
|
|
static bool HasClickListener(nsIContent* aContent);
|
|
|
|
/**
|
|
* Dispatch click event to XUL tree cell.
|
|
*
|
|
* @param aTree [in] tree
|
|
* @param aRowIndex [in] row index
|
|
* @param aColumn [in] column object
|
|
* @param aPseudoElm [in] pseudo element inside the cell, see
|
|
* XULTreeElement for available values
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
static void DispatchClickEvent(mozilla::dom::XULTreeElement* aTree,
|
|
int32_t aRowIndex, nsTreeColumn* aColumn,
|
|
const nsAString& aPseudoElt = u""_ns);
|
|
|
|
/**
|
|
* Send mouse event to the given element.
|
|
*
|
|
* @param aMessage [in] an event message (see EventForwards.h)
|
|
* @param aX [in] x coordinate in dev pixels
|
|
* @param aY [in] y coordinate in dev pixels
|
|
* @param aContent [in] the element
|
|
* @param aFrame [in] frame of the element
|
|
* @param aPresShell [in] the presshell for the element
|
|
* @param aRootWidget [in] the root widget of the element
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
static void DispatchMouseEvent(mozilla::EventMessage aMessage, int32_t aX,
|
|
int32_t aY, nsIContent* aContent,
|
|
nsIFrame* aFrame, PresShell* aPresShell,
|
|
nsIWidget* aRootWidget);
|
|
|
|
/**
|
|
* Send a touch event with a single touch point to the given element.
|
|
*
|
|
* @param aMessage [in] an event message (see EventForwards.h)
|
|
* @param aX [in] x coordinate in dev pixels
|
|
* @param aY [in] y coordinate in dev pixels
|
|
* @param aContent [in] the element
|
|
* @param aFrame [in] frame of the element
|
|
* @param aPresShell [in] the presshell for the element
|
|
* @param aRootWidget [in] the root widget of the element
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
static void DispatchTouchEvent(mozilla::EventMessage aMessage, int32_t aX,
|
|
int32_t aY, nsIContent* aContent,
|
|
nsIFrame* aFrame, PresShell* aPresShell,
|
|
nsIWidget* aRootWidget);
|
|
|
|
/**
|
|
* Return an accesskey registered on the given element by
|
|
* EventStateManager or 0 if there is no registered accesskey.
|
|
*
|
|
* @param aContent - the given element.
|
|
*/
|
|
static uint32_t GetAccessKeyFor(nsIContent* aContent);
|
|
|
|
/**
|
|
* Return DOM element related with the given node, i.e.
|
|
* a) itself if it is DOM element
|
|
* b) parent element if it is text node
|
|
* c) otherwise nullptr
|
|
*
|
|
* @param aNode [in] the given DOM node
|
|
*/
|
|
static nsIContent* GetDOMElementFor(nsIContent* aContent);
|
|
|
|
/**
|
|
* Return DOM node for the given DOM point.
|
|
*/
|
|
static nsINode* GetDOMNodeFromDOMPoint(nsINode* aNode, uint32_t aOffset);
|
|
|
|
/**
|
|
* Is the first passed in node an ancestor of the second?
|
|
* Note: A node is not considered to be the ancestor of itself.
|
|
*
|
|
* @param aPossibleAncestorNode [in] node to test for ancestor-ness of
|
|
* aPossibleDescendantNode
|
|
* @param aPossibleDescendantNode [in] node to test for descendant-ness of
|
|
* aPossibleAncestorNode
|
|
* @param aRootNode [in, optional] the root node that search
|
|
* search should be performed within
|
|
* @return true if aPossibleAncestorNode is an ancestor of
|
|
* aPossibleDescendantNode
|
|
*/
|
|
static bool IsAncestorOf(nsINode* aPossibleAncestorNode,
|
|
nsINode* aPossibleDescendantNode,
|
|
nsINode* aRootNode = nullptr);
|
|
|
|
/**
|
|
* Helper method to scroll range into view, used for implementation of
|
|
* nsIAccessibleText::scrollSubstringTo().
|
|
*
|
|
* @param aFrame the frame for accessible the range belongs to.
|
|
* @param aRange the range to scroll to
|
|
* @param aScrollType the place a range should be scrolled to
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY static nsresult ScrollSubstringTo(
|
|
nsIFrame* aFrame, nsRange* aRange, uint32_t aScrollType);
|
|
|
|
/** Helper method to scroll range into view, used for implementation of
|
|
* nsIAccessibleText::scrollSubstringTo[Point]().
|
|
*
|
|
* @param aFrame the frame for accessible the range belongs to.
|
|
* @param aRange the range to scroll to
|
|
* @param aVertical how to align vertically, specified in percents, and
|
|
* when.
|
|
* @param aHorizontal how to align horizontally, specified in percents,
|
|
* and when.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY static nsresult ScrollSubstringTo(
|
|
nsIFrame* aFrame, nsRange* aRange, mozilla::ScrollAxis aVertical,
|
|
mozilla::ScrollAxis aHorizontal);
|
|
|
|
/**
|
|
* Scrolls the given frame to the point, used for implememntation of
|
|
* nsIAccessible::scrollToPoint and nsIAccessibleText::scrollSubstringToPoint.
|
|
*
|
|
* @param aScrollableFrame the scrollable frame
|
|
* @param aFrame the frame to scroll
|
|
* @param aPoint the point scroll to
|
|
*/
|
|
static void ScrollFrameToPoint(nsIFrame* aScrollableFrame, nsIFrame* aFrame,
|
|
const nsIntPoint& aPoint);
|
|
|
|
/**
|
|
* Converts scroll type constant defined in nsIAccessibleScrollType to
|
|
* vertical and horizontal parameters.
|
|
*/
|
|
static void ConvertScrollTypeToPercents(uint32_t aScrollType,
|
|
mozilla::ScrollAxis* aVertical,
|
|
mozilla::ScrollAxis* aHorizontal);
|
|
|
|
/**
|
|
* Returns coordinates in device pixels relative screen for the top level
|
|
* window.
|
|
*
|
|
* @param aNode the DOM node hosted in the window.
|
|
*/
|
|
static nsIntPoint GetScreenCoordsForWindow(nsINode* aNode);
|
|
|
|
/**
|
|
* Return document shell for the given DOM node.
|
|
*/
|
|
static already_AddRefed<nsIDocShell> GetDocShellFor(nsINode* aNode);
|
|
|
|
/**
|
|
* Return true if the given document is root document.
|
|
*/
|
|
static bool IsRootDocument(Document* aDocument);
|
|
|
|
/**
|
|
* Return true if the given document is content document (not chrome).
|
|
*/
|
|
static bool IsContentDocument(Document* aDocument);
|
|
|
|
/**
|
|
* Return true if the given document is a top level content document in this
|
|
* process.
|
|
* This will be true for tab documents and out-of-process iframe documents.
|
|
*/
|
|
static bool IsTopLevelContentDocInProcess(Document* aDocumentNode);
|
|
|
|
/**
|
|
* Return true if the given document is an error page.
|
|
*/
|
|
static bool IsErrorPage(Document* aDocument);
|
|
|
|
/**
|
|
* Return presShell for the document containing the given DOM node.
|
|
*/
|
|
static PresShell* GetPresShellFor(nsINode* aNode);
|
|
|
|
/**
|
|
* Get the ID for an element, in some types of XML this may not be the ID
|
|
* attribute
|
|
* @param aContent Node to get the ID for
|
|
* @param aID Where to put ID string
|
|
* @return true if there is an ID set for this node
|
|
*/
|
|
static bool GetID(nsIContent* aContent, nsAString& aID);
|
|
|
|
/**
|
|
* Convert attribute value of the given node to positive integer. If no
|
|
* attribute or wrong value then false is returned.
|
|
*/
|
|
static bool GetUIntAttr(nsIContent* aContent, nsAtom* aAttr, int32_t* aUInt);
|
|
|
|
/**
|
|
* Returns language for the given node.
|
|
*
|
|
* @param aContent [in] the given node
|
|
* @param aRootContent [in] container of the given node
|
|
* @param aLanguage [out] language
|
|
*/
|
|
static void GetLanguageFor(nsIContent* aContent, nsIContent* aRootContent,
|
|
nsAString& aLanguage);
|
|
|
|
/**
|
|
* Return tree from any levels DOMNode under the XUL tree.
|
|
*/
|
|
static mozilla::dom::XULTreeElement* GetTree(nsIContent* aContent);
|
|
|
|
/**
|
|
* Return first sensible column for the given tree box object.
|
|
*/
|
|
static already_AddRefed<nsTreeColumn> GetFirstSensibleColumn(
|
|
mozilla::dom::XULTreeElement* aTree,
|
|
mozilla::FlushType = mozilla::FlushType::Frames);
|
|
|
|
/**
|
|
* Return sensible columns count for the given tree box object.
|
|
*/
|
|
static uint32_t GetSensibleColumnCount(mozilla::dom::XULTreeElement* aTree);
|
|
|
|
/**
|
|
* Return sensible column at the given index for the given tree box object.
|
|
*/
|
|
static already_AddRefed<nsTreeColumn> GetSensibleColumnAt(
|
|
mozilla::dom::XULTreeElement* aTree, uint32_t aIndex);
|
|
|
|
/**
|
|
* Return next sensible column for the given column.
|
|
*/
|
|
static already_AddRefed<nsTreeColumn> GetNextSensibleColumn(
|
|
nsTreeColumn* aColumn);
|
|
|
|
/**
|
|
* Return previous sensible column for the given column.
|
|
*/
|
|
static already_AddRefed<nsTreeColumn> GetPreviousSensibleColumn(
|
|
nsTreeColumn* aColumn);
|
|
|
|
/**
|
|
* Return true if the given column is hidden (i.e. not sensible).
|
|
*/
|
|
static bool IsColumnHidden(nsTreeColumn* aColumn);
|
|
|
|
/**
|
|
* Scroll content into view.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT
|
|
static void ScrollTo(PresShell* aPresShell, nsIContent* aContent,
|
|
uint32_t aScrollType);
|
|
|
|
/**
|
|
* Return true if the given node is table header element.
|
|
*/
|
|
static bool IsHTMLTableHeader(nsIContent* aContent);
|
|
|
|
/**
|
|
* Returns true if the given string is empty or contains whitespace symbols
|
|
* only. In contrast to nsWhitespaceTokenizer class it takes into account
|
|
* non-breaking space (0xa0).
|
|
*/
|
|
static bool IsWhitespaceString(const nsAString& aString);
|
|
|
|
/**
|
|
* Returns true if the given character is whitespace symbol.
|
|
*/
|
|
static bool IsWhitespace(char16_t aChar) {
|
|
return aChar == ' ' || aChar == '\n' || aChar == '\r' || aChar == '\t' ||
|
|
aChar == 0xa0;
|
|
}
|
|
|
|
/*
|
|
* Return true if there are any observers of accessible events.
|
|
*/
|
|
static bool AccEventObserversExist();
|
|
|
|
/**
|
|
* Notify accessible event observers of an event.
|
|
*/
|
|
static void DispatchAccEvent(RefPtr<nsIAccessibleEvent> aEvent);
|
|
|
|
static bool IsDisplayContents(nsIContent* aContent);
|
|
|
|
/**
|
|
* Return whether the document and all its in-process ancestors are visible in
|
|
* the sense of pageshow / hide.
|
|
*/
|
|
static bool IsDocumentVisibleConsideringInProcessAncestors(
|
|
const Document* aDocument);
|
|
};
|
|
|
|
#endif
|