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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /accessible/base/nsCoreUtils.h
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'accessible/base/nsCoreUtils.h')
-rw-r--r--accessible/base/nsCoreUtils.h329
1 files changed, 329 insertions, 0 deletions
diff --git a/accessible/base/nsCoreUtils.h b/accessible/base/nsCoreUtils.h
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+/* -*- 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 "AttrArray.h"
+#include "mozilla/EventForwards.h"
+#include "nsCaseTreatment.h"
+#include "nsIAccessibleEvent.h"
+#include "nsIContent.h"
+#include "mozilla/FlushType.h"
+#include "mozilla/PresShellForwards.h"
+
+#include "nsPoint.h"
+#include "nsTArray.h"
+#include "Units.h"
+
+class nsAttrValue;
+class nsGenericHTMLElement;
+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 (in dev pixels)
+ */
+ static void ScrollFrameToPoint(nsIFrame* aScrollableFrame, nsIFrame* aFrame,
+ const mozilla::LayoutDeviceIntPoint& 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);
+
+ /**
+ * 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 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);
+ static bool GetUIntAttrValue(const nsAttrValue* aVal, 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);
+ static bool CanCreateAccessibleWithoutFrame(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