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tenfourfox/accessible/base/nsCoreUtils.cpp

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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/. */
#include "nsCoreUtils.h"
#include "nsIAccessibleTypes.h"
#include "nsIBaseWindow.h"
#include "nsIDocShellTreeOwner.h"
#include "nsIDocument.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMHTMLElement.h"
#include "nsRange.h"
#include "nsIBoxObject.h"
#include "nsIDOMXULElement.h"
#include "nsIDocShell.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsIScrollableFrame.h"
#include "nsISelectionPrivate.h"
#include "nsISelectionController.h"
#include "mozilla/dom/TouchEvent.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/TouchEvents.h"
#include "nsView.h"
#include "nsGkAtoms.h"
#include "nsComponentManagerUtils.h"
#include "nsITreeBoxObject.h"
#include "nsITreeColumns.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
////////////////////////////////////////////////////////////////////////////////
// nsCoreUtils
////////////////////////////////////////////////////////////////////////////////
bool
nsCoreUtils::HasClickListener(nsIContent *aContent)
{
NS_ENSURE_TRUE(aContent, false);
EventListenerManager* listenerManager =
aContent->GetExistingListenerManager();
return listenerManager &&
(listenerManager->HasListenersFor(nsGkAtoms::onclick) ||
listenerManager->HasListenersFor(nsGkAtoms::onmousedown) ||
listenerManager->HasListenersFor(nsGkAtoms::onmouseup));
}
void
nsCoreUtils::DispatchClickEvent(nsITreeBoxObject *aTreeBoxObj,
int32_t aRowIndex, nsITreeColumn *aColumn,
const nsAString& aPseudoElt)
{
nsCOMPtr<nsIDOMElement> tcElm;
aTreeBoxObj->GetTreeBody(getter_AddRefs(tcElm));
if (!tcElm)
return;
nsCOMPtr<nsIContent> tcContent(do_QueryInterface(tcElm));
nsIDocument *document = tcContent->GetCurrentDoc();
if (!document)
return;
nsCOMPtr<nsIPresShell> presShell = document->GetShell();
if (!presShell)
return;
// Ensure row is visible.
aTreeBoxObj->EnsureRowIsVisible(aRowIndex);
// Calculate x and y coordinates.
int32_t x = 0, y = 0, width = 0, height = 0;
nsresult rv = aTreeBoxObj->GetCoordsForCellItem(aRowIndex, aColumn,
aPseudoElt,
&x, &y, &width, &height);
if (NS_FAILED(rv))
return;
nsCOMPtr<nsIDOMXULElement> tcXULElm(do_QueryInterface(tcElm));
nsCOMPtr<nsIBoxObject> tcBoxObj;
tcXULElm->GetBoxObject(getter_AddRefs(tcBoxObj));
int32_t tcX = 0;
tcBoxObj->GetX(&tcX);
int32_t tcY = 0;
tcBoxObj->GetY(&tcY);
// Dispatch mouse events.
nsWeakFrame tcFrame = tcContent->GetPrimaryFrame();
nsIFrame* rootFrame = presShell->GetRootFrame();
nsPoint offset;
nsIWidget *rootWidget =
rootFrame->GetViewExternal()->GetNearestWidget(&offset);
RefPtr<nsPresContext> presContext = presShell->GetPresContext();
int32_t cnvdX = presContext->CSSPixelsToDevPixels(tcX + x + 1) +
presContext->AppUnitsToDevPixels(offset.x);
int32_t cnvdY = presContext->CSSPixelsToDevPixels(tcY + y + 1) +
presContext->AppUnitsToDevPixels(offset.y);
// XUL is just desktop, so there is no real reason for senfing touch events.
DispatchMouseEvent(eMouseDown, cnvdX, cnvdY,
tcContent, tcFrame, presShell, rootWidget);
DispatchMouseEvent(eMouseUp, cnvdX, cnvdY,
tcContent, tcFrame, presShell, rootWidget);
}
void
nsCoreUtils::DispatchMouseEvent(EventMessage aMessage, int32_t aX, int32_t aY,
nsIContent *aContent, nsIFrame *aFrame,
nsIPresShell *aPresShell, nsIWidget *aRootWidget)
{
WidgetMouseEvent event(true, aMessage, aRootWidget,
WidgetMouseEvent::eReal, WidgetMouseEvent::eNormal);
event.refPoint = LayoutDeviceIntPoint(aX, aY);
event.clickCount = 1;
event.button = WidgetMouseEvent::eLeftButton;
event.time = PR_IntervalNow();
event.inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
nsEventStatus status = nsEventStatus_eIgnore;
aPresShell->HandleEventWithTarget(&event, aFrame, aContent, &status);
}
void
nsCoreUtils::DispatchTouchEvent(EventMessage aMessage, int32_t aX, int32_t aY,
nsIContent* aContent, nsIFrame* aFrame,
nsIPresShell* aPresShell, nsIWidget* aRootWidget)
{
if (!dom::TouchEvent::PrefEnabled())
return;
WidgetTouchEvent event(true, aMessage, aRootWidget);
event.time = PR_IntervalNow();
// XXX: Touch has an identifier of -1 to hint that it is synthesized.
RefPtr<dom::Touch> t = new dom::Touch(-1, LayoutDeviceIntPoint(aX, aY),
LayoutDeviceIntPoint(1, 1), 0.0f, 1.0f);
t->SetTarget(aContent);
event.touches.AppendElement(t);
nsEventStatus status = nsEventStatus_eIgnore;
aPresShell->HandleEventWithTarget(&event, aFrame, aContent, &status);
}
uint32_t
nsCoreUtils::GetAccessKeyFor(nsIContent* aContent)
{
// Accesskeys are registered by @accesskey attribute only. At first check
// whether it is presented on the given element to avoid the slow
// EventStateManager::GetRegisteredAccessKey() method.
if (!aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::accesskey))
return 0;
nsIPresShell* presShell = aContent->OwnerDoc()->GetShell();
if (!presShell)
return 0;
nsPresContext *presContext = presShell->GetPresContext();
if (!presContext)
return 0;
EventStateManager *esm = presContext->EventStateManager();
if (!esm)
return 0;
return esm->GetRegisteredAccessKey(aContent);
}
nsIContent *
nsCoreUtils::GetDOMElementFor(nsIContent *aContent)
{
if (aContent->IsElement())
return aContent;
if (aContent->IsNodeOfType(nsINode::eTEXT))
return aContent->GetFlattenedTreeParent();
return nullptr;
}
nsINode *
nsCoreUtils::GetDOMNodeFromDOMPoint(nsINode *aNode, uint32_t aOffset)
{
if (aNode && aNode->IsElement()) {
uint32_t childCount = aNode->GetChildCount();
NS_ASSERTION(aOffset <= childCount, "Wrong offset of the DOM point!");
// The offset can be after last child of container node that means DOM point
// is placed immediately after the last child. In this case use the DOM node
// from the given DOM point is used as result node.
if (aOffset != childCount)
return aNode->GetChildAt(aOffset);
}
return aNode;
}
nsIContent*
nsCoreUtils::GetRoleContent(nsINode *aNode)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
if (!content) {
nsCOMPtr<nsIDocument> doc(do_QueryInterface(aNode));
if (doc) {
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(aNode));
if (htmlDoc) {
nsCOMPtr<nsIDOMHTMLElement> bodyElement;
htmlDoc->GetBody(getter_AddRefs(bodyElement));
content = do_QueryInterface(bodyElement);
}
else {
return doc->GetDocumentElement();
}
}
}
return content;
}
bool
nsCoreUtils::IsAncestorOf(nsINode *aPossibleAncestorNode,
nsINode *aPossibleDescendantNode,
nsINode *aRootNode)
{
NS_ENSURE_TRUE(aPossibleAncestorNode && aPossibleDescendantNode, false);
nsINode *parentNode = aPossibleDescendantNode;
while ((parentNode = parentNode->GetParentNode()) &&
parentNode != aRootNode) {
if (parentNode == aPossibleAncestorNode)
return true;
}
return false;
}
nsresult
nsCoreUtils::ScrollSubstringTo(nsIFrame* aFrame, nsRange* aRange,
uint32_t aScrollType)
{
nsIPresShell::ScrollAxis vertical, horizontal;
ConvertScrollTypeToPercents(aScrollType, &vertical, &horizontal);
return ScrollSubstringTo(aFrame, aRange, vertical, horizontal);
}
nsresult
nsCoreUtils::ScrollSubstringTo(nsIFrame* aFrame, nsRange* aRange,
nsIPresShell::ScrollAxis aVertical,
nsIPresShell::ScrollAxis aHorizontal)
{
if (!aFrame)
return NS_ERROR_FAILURE;
nsPresContext *presContext = aFrame->PresContext();
nsCOMPtr<nsISelectionController> selCon;
aFrame->GetSelectionController(presContext, getter_AddRefs(selCon));
NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
nsCOMPtr<nsISelection> selection;
selCon->GetSelection(nsISelectionController::SELECTION_ACCESSIBILITY,
getter_AddRefs(selection));
nsCOMPtr<nsISelectionPrivate> privSel(do_QueryInterface(selection));
selection->RemoveAllRanges();
selection->AddRange(aRange);
privSel->ScrollIntoViewInternal(
nsISelectionController::SELECTION_ANCHOR_REGION,
true, aVertical, aHorizontal);
selection->CollapseToStart();
return NS_OK;
}
void
nsCoreUtils::ScrollFrameToPoint(nsIFrame *aScrollableFrame,
nsIFrame *aFrame,
const nsIntPoint& aPoint)
{
nsIScrollableFrame* scrollableFrame = do_QueryFrame(aScrollableFrame);
if (!scrollableFrame)
return;
nsPoint point =
ToAppUnits(aPoint, aFrame->PresContext()->AppUnitsPerDevPixel());
nsRect frameRect = aFrame->GetScreenRectInAppUnits();
nsPoint deltaPoint(point.x - frameRect.x, point.y - frameRect.y);
nsPoint scrollPoint = scrollableFrame->GetScrollPosition();
scrollPoint -= deltaPoint;
scrollableFrame->ScrollTo(scrollPoint, nsIScrollableFrame::INSTANT);
}
void
nsCoreUtils::ConvertScrollTypeToPercents(uint32_t aScrollType,
nsIPresShell::ScrollAxis *aVertical,
nsIPresShell::ScrollAxis *aHorizontal)
{
int16_t whereY, whereX;
nsIPresShell::WhenToScroll whenY, whenX;
switch (aScrollType)
{
case nsIAccessibleScrollType::SCROLL_TYPE_TOP_LEFT:
whereY = nsIPresShell::SCROLL_TOP;
whenY = nsIPresShell::SCROLL_ALWAYS;
whereX = nsIPresShell::SCROLL_LEFT;
whenX = nsIPresShell::SCROLL_ALWAYS;
break;
case nsIAccessibleScrollType::SCROLL_TYPE_BOTTOM_RIGHT:
whereY = nsIPresShell::SCROLL_BOTTOM;
whenY = nsIPresShell::SCROLL_ALWAYS;
whereX = nsIPresShell::SCROLL_RIGHT;
whenX = nsIPresShell::SCROLL_ALWAYS;
break;
case nsIAccessibleScrollType::SCROLL_TYPE_TOP_EDGE:
whereY = nsIPresShell::SCROLL_TOP;
whenY = nsIPresShell::SCROLL_ALWAYS;
whereX = nsIPresShell::SCROLL_MINIMUM;
whenX = nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE;
break;
case nsIAccessibleScrollType::SCROLL_TYPE_BOTTOM_EDGE:
whereY = nsIPresShell::SCROLL_BOTTOM;
whenY = nsIPresShell::SCROLL_ALWAYS;
whereX = nsIPresShell::SCROLL_MINIMUM;
whenX = nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE;
break;
case nsIAccessibleScrollType::SCROLL_TYPE_LEFT_EDGE:
whereY = nsIPresShell::SCROLL_MINIMUM;
whenY = nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE;
whereX = nsIPresShell::SCROLL_LEFT;
whenX = nsIPresShell::SCROLL_ALWAYS;
break;
case nsIAccessibleScrollType::SCROLL_TYPE_RIGHT_EDGE:
whereY = nsIPresShell::SCROLL_MINIMUM;
whenY = nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE;
whereX = nsIPresShell::SCROLL_RIGHT;
whenX = nsIPresShell::SCROLL_ALWAYS;
break;
default:
whereY = nsIPresShell::SCROLL_MINIMUM;
whenY = nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE;
whereX = nsIPresShell::SCROLL_MINIMUM;
whenX = nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE;
}
*aVertical = nsIPresShell::ScrollAxis(whereY, whenY);
*aHorizontal = nsIPresShell::ScrollAxis(whereX, whenX);
}
nsIntPoint
nsCoreUtils::GetScreenCoordsForWindow(nsINode *aNode)
{
nsIntPoint coords(0, 0);
nsCOMPtr<nsIDocShellTreeItem> treeItem(GetDocShellFor(aNode));
if (!treeItem)
return coords;
nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
treeItem->GetTreeOwner(getter_AddRefs(treeOwner));
if (!treeOwner)
return coords;
nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(treeOwner);
if (baseWindow)
baseWindow->GetPosition(&coords.x, &coords.y); // in device pixels
return coords;
}
already_AddRefed<nsIDocShell>
nsCoreUtils::GetDocShellFor(nsINode *aNode)
{
if (!aNode)
return nullptr;
nsCOMPtr<nsIDocShell> docShell = aNode->OwnerDoc()->GetDocShell();
return docShell.forget();
}
bool
nsCoreUtils::IsRootDocument(nsIDocument *aDocument)
{
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = aDocument->GetDocShell();
NS_ASSERTION(docShellTreeItem, "No document shell for document!");
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
docShellTreeItem->GetParent(getter_AddRefs(parentTreeItem));
return !parentTreeItem;
}
bool
nsCoreUtils::IsContentDocument(nsIDocument *aDocument)
{
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = aDocument->GetDocShell();
NS_ASSERTION(docShellTreeItem, "No document shell tree item for document!");
return (docShellTreeItem->ItemType() == nsIDocShellTreeItem::typeContent);
}
bool
nsCoreUtils::IsTabDocument(nsIDocument* aDocumentNode)
{
nsCOMPtr<nsIDocShellTreeItem> treeItem(aDocumentNode->GetDocShell());
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
treeItem->GetParent(getter_AddRefs(parentTreeItem));
// Tab document running in own process doesn't have parent.
if (XRE_IsContentProcess())
return !parentTreeItem;
// Parent of docshell for tab document running in chrome process is root.
nsCOMPtr<nsIDocShellTreeItem> rootTreeItem;
treeItem->GetRootTreeItem(getter_AddRefs(rootTreeItem));
return parentTreeItem == rootTreeItem;
}
bool
nsCoreUtils::IsErrorPage(nsIDocument *aDocument)
{
nsIURI *uri = aDocument->GetDocumentURI();
bool isAboutScheme = false;
uri->SchemeIs("about", &isAboutScheme);
if (!isAboutScheme)
return false;
nsAutoCString path;
uri->GetPath(path);
NS_NAMED_LITERAL_CSTRING(neterror, "neterror");
NS_NAMED_LITERAL_CSTRING(certerror, "certerror");
return StringBeginsWith(path, neterror) || StringBeginsWith(path, certerror);
}
bool
nsCoreUtils::GetID(nsIContent *aContent, nsAString& aID)
{
return aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, aID);
}
bool
nsCoreUtils::GetUIntAttr(nsIContent *aContent, nsIAtom *aAttr, int32_t *aUInt)
{
nsAutoString value;
aContent->GetAttr(kNameSpaceID_None, aAttr, value);
if (!value.IsEmpty()) {
nsresult error = NS_OK;
int32_t integer = value.ToInteger(&error);
if (NS_SUCCEEDED(error) && integer > 0) {
*aUInt = integer;
return true;
}
}
return false;
}
void
nsCoreUtils::GetLanguageFor(nsIContent *aContent, nsIContent *aRootContent,
nsAString& aLanguage)
{
aLanguage.Truncate();
nsIContent *walkUp = aContent;
while (walkUp && walkUp != aRootContent &&
!walkUp->GetAttr(kNameSpaceID_None, nsGkAtoms::lang, aLanguage))
walkUp = walkUp->GetParent();
}
already_AddRefed<nsIBoxObject>
nsCoreUtils::GetTreeBodyBoxObject(nsITreeBoxObject *aTreeBoxObj)
{
nsCOMPtr<nsIDOMElement> tcElm;
aTreeBoxObj->GetTreeBody(getter_AddRefs(tcElm));
nsCOMPtr<nsIDOMXULElement> tcXULElm(do_QueryInterface(tcElm));
if (!tcXULElm)
return nullptr;
nsCOMPtr<nsIBoxObject> boxObj;
tcXULElm->GetBoxObject(getter_AddRefs(boxObj));
return boxObj.forget();
}
already_AddRefed<nsITreeBoxObject>
nsCoreUtils::GetTreeBoxObject(nsIContent *aContent)
{
// Find DOMNode's parents recursively until reach the <tree> tag
nsIContent* currentContent = aContent;
while (currentContent) {
if (currentContent->NodeInfo()->Equals(nsGkAtoms::tree,
kNameSpaceID_XUL)) {
// We will get the nsITreeBoxObject from the tree node
nsCOMPtr<nsIDOMXULElement> xulElement(do_QueryInterface(currentContent));
if (xulElement) {
nsCOMPtr<nsIBoxObject> box;
xulElement->GetBoxObject(getter_AddRefs(box));
nsCOMPtr<nsITreeBoxObject> treeBox(do_QueryInterface(box));
if (treeBox)
return treeBox.forget();
}
}
currentContent = currentContent->GetFlattenedTreeParent();
}
return nullptr;
}
already_AddRefed<nsITreeColumn>
nsCoreUtils::GetFirstSensibleColumn(nsITreeBoxObject *aTree)
{
nsCOMPtr<nsITreeColumns> cols;
aTree->GetColumns(getter_AddRefs(cols));
if (!cols)
return nullptr;
nsCOMPtr<nsITreeColumn> column;
cols->GetFirstColumn(getter_AddRefs(column));
if (column && IsColumnHidden(column))
return GetNextSensibleColumn(column);
return column.forget();
}
uint32_t
nsCoreUtils::GetSensibleColumnCount(nsITreeBoxObject *aTree)
{
uint32_t count = 0;
nsCOMPtr<nsITreeColumns> cols;
aTree->GetColumns(getter_AddRefs(cols));
if (!cols)
return count;
nsCOMPtr<nsITreeColumn> column;
cols->GetFirstColumn(getter_AddRefs(column));
while (column) {
if (!IsColumnHidden(column))
count++;
nsCOMPtr<nsITreeColumn> nextColumn;
column->GetNext(getter_AddRefs(nextColumn));
column.swap(nextColumn);
}
return count;
}
already_AddRefed<nsITreeColumn>
nsCoreUtils::GetSensibleColumnAt(nsITreeBoxObject *aTree, uint32_t aIndex)
{
uint32_t idx = aIndex;
nsCOMPtr<nsITreeColumn> column = GetFirstSensibleColumn(aTree);
while (column) {
if (idx == 0)
return column.forget();
idx--;
column = GetNextSensibleColumn(column);
}
return nullptr;
}
already_AddRefed<nsITreeColumn>
nsCoreUtils::GetNextSensibleColumn(nsITreeColumn *aColumn)
{
nsCOMPtr<nsITreeColumn> nextColumn;
aColumn->GetNext(getter_AddRefs(nextColumn));
while (nextColumn && IsColumnHidden(nextColumn)) {
nsCOMPtr<nsITreeColumn> tempColumn;
nextColumn->GetNext(getter_AddRefs(tempColumn));
nextColumn.swap(tempColumn);
}
return nextColumn.forget();
}
already_AddRefed<nsITreeColumn>
nsCoreUtils::GetPreviousSensibleColumn(nsITreeColumn *aColumn)
{
nsCOMPtr<nsITreeColumn> prevColumn;
aColumn->GetPrevious(getter_AddRefs(prevColumn));
while (prevColumn && IsColumnHidden(prevColumn)) {
nsCOMPtr<nsITreeColumn> tempColumn;
prevColumn->GetPrevious(getter_AddRefs(tempColumn));
prevColumn.swap(tempColumn);
}
return prevColumn.forget();
}
bool
nsCoreUtils::IsColumnHidden(nsITreeColumn *aColumn)
{
nsCOMPtr<nsIDOMElement> element;
aColumn->GetElement(getter_AddRefs(element));
nsCOMPtr<nsIContent> content = do_QueryInterface(element);
return content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden,
nsGkAtoms::_true, eCaseMatters);
}
void
nsCoreUtils::ScrollTo(nsIPresShell* aPresShell, nsIContent* aContent,
uint32_t aScrollType)
{
nsIPresShell::ScrollAxis vertical, horizontal;
ConvertScrollTypeToPercents(aScrollType, &vertical, &horizontal);
aPresShell->ScrollContentIntoView(aContent, vertical, horizontal,
nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
}
bool
nsCoreUtils::IsWhitespaceString(const nsSubstring& aString)
{
nsSubstring::const_char_iterator iterBegin, iterEnd;
aString.BeginReading(iterBegin);
aString.EndReading(iterEnd);
while (iterBegin != iterEnd && IsWhitespace(*iterBegin))
++iterBegin;
return iterBegin == iterEnd;
}
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